62results about How to "Play the role of cushioning and damping" patented technology

The invention discloses low-water-absorption-rate expansion vibration-damping glue, belongs to the technical field of expansion vibration-damping glue, and mainly solves the problem of high water absorption rate of the expansion vibration-damping glue in the prior art. The low-water-absorption-rate expansion vibration-damping glue is mainly characterized by including 10-40 parts of liquid polybutadiene; 0-10 parts of solid rubber; 0-20 parts of a softener; 0-10 parts of a tackifier; 0-10 parts of sulfur; 0-10 parts of a promoter; 0.1-3 parts of an antioxidant; 0.1-10 parts of an active agent; 0-3 parts of a foaming agent; 0-15 parts of parts of a film forming agent and 10-50 parts of a filler. The low-water-absorption-rate expansion vibration-damping glue has the advantages of significant reduction of water absorption rate of cured expansion vibration-damping glue with other properties remained basically unchanged, and can be widely used in bonding and filling between stiffening beams and outside plates of welding assembly line auto-body cover panels, and can play the role of buffering and vibration-damping.

The invention discloses a heavy-load grinding wheel. The heavy-load grinding wheel comprises the following components in percentage by weight: sintered corundum, fused alumina zirconia, brown fused alumina, a coupler, phenol-formaldehyde resin powder, elastic polyvinyl chloride powder, cryolite powder, light calcium carbonate micro powder and impregnation chopped glass fibers and is prepared by a hot pressing molding process. The elastic polyvinyl chloride resin powder is mixed in a grinding material, so that the tenacity and the shock absorbing effect of the grinding wheel are improved, and the probability of sheet blasting is greatly reduced. On the other hand, elastic polyvinyl chloride has excellent flame resistance, so that burning of grinding heat to phenol-formaldehyde resin is reduced, the bonding ability of the phenol-formaldehyde resin to the grinding material is improved, and the grinding ratio of the grinding wheel is improved. The coupler is used for modifying the surface of the phenol-formaldehyde resin, so that the interface bonding force between the organic resin and the inorganic grinding material is stronger, and the rotation strength of the grinding wheel is improved. Furthermore, due to the adoption of the impregnation chopped glass fibers, the dissolving ability of the phenol-formaldehyde resin is favorably enhanced, and the rotation strength of the grinding wheel is further improved.

The invention relates to a vibration-damping temperature-insulation elemental-plate-type ballast-less track structure. The structure comprises a trisection asphalt grading macadam base layer, a rubbermodified asphalt layer and a track panel layer which are laid from bottom to top in sequence; the trisection asphalt grading macadam base layer comprises a grading macadam layer, an asphalt macadam mixture layer, and asphalt concrete mixture layer; the grading macadam layer is laid on filling and a soil base layer. According to the vibration-damping temperature-insulation elemental-plate-type ballast-less track structure, the structure stability of frozen soil can be effectively guaranteed, and the track panel layer can disperse upper loading and make upper loading evenly transmitted downwards; the rubber modified asphalt layer can lower influence of vibration generated by a high speed running train on a lower structural layer, and the effects of buffer and vibration damping are achieved;the void content of the trisection asphalt grading macadam base layer gradually increases from top to bottom, the void content of an upper-layer mixture and a middle-layer mixture is relatively low,the influence of the temperature on a frozen soil layer is insulated, and meanwhile the waterproof effect can also be achieved; the elemental-plate-type track structure is adopted and has the advantages of specific force transmission mode, excellent smoothness and stability, quick repairing and the like.

The invention provides a maritime floating platform; the whole internal structure of a main hull adopts a honey comb structure arrayed; each hollow hexagonal tube uses a seal welded mode; the side of the hollow hexagonal tube contacted with sea water and the welding gap are processed by waterproof coating; the integral structure has changeful shapes, such as diamond, square, and irregular shapes; as long as each hollow hexagonal tube is ensured to be the integrity structure, the hull is increased with two layers again; the middle layer is taken as a cabin and used for storehouses, crew cabins and the like; the upper most layer is designed to be a platform and can be used as machine running and a parking apron of a super marine; the platform can be applied to the military purposes.

The invention discloses a buffer device of a textile machine. The buffer device comprises a top plate, an upper supporting plate, a lower supporting plate and a bottom plate. Top plate spring fixing rods are fixedly welded to the lower side of the top plate. The upper supporting plate is arranged on the lower side of the top plate. Upper supporting plate spring fixing rods are fixedly welded to the upper end of the upper supporting plate. First first-stage springs are fixedly installed between the top plate spring fixing rods and the upper supporting plate spring fixing rods. The lower supporting plate is fixedly connected to the lower side of the upper supporting plate through second-stage springs. Second first-stage springs are fixedly arranged on the lower side of the lower supporting plate. First telescopic rods are arranged on the upper side of the bottom plate. Second telescopic rods are inserted into the upper sides of the first telescopic rods. The second telescopic rods and the first telescopic rods are stainless steel cylinders, and the upper ends of the first telescopic rods are hollow. The buffer device of the textile machine is simple in structure, convenient to use and practical and can achieve the buffer function effectively, meet different requirements and reduce noise pollution.

The invention relates to a locking device for the hammer head of a crusher. The inventin aims to provide the locking device for the hammer head of the crusher to solve the problems of looseness and dropping off of the hammer head of the crusher, so that the requirements of continuously crushing to to-be-crushed objects with diffrent crushing grain grades are met. The locking device for the hammer head of the crusher comprises a fixing seat and a big bolt, after passing through the through hole on the fixing seat, the big bolt is used for fixing a cutter tooth on a cutter tooth base through threaded connection, the device further comprises a spring, a safe bearing plate and at least two small bolts, the through hole on the fixing seat is a stepped hole, the spring is sleeved on the big bolt, one end of the spring is in contact with the stepped surface of the stepped hole, the other end of the spring is in contact with the bolt head of the big bolt, a big bolt fastener hole is formed on the safe padding plate, the big bolt fastener hole is hexagonal, the safe bearing plate is fixedly mounted on the fixing seat through small bolts, and the bolt head of the big bolt is positioned inside the big bolt fastener hole.

The invention discloses a manufacturing method for a heavy-load grinding wheel. The method includes the following steps that 1) raw materials are taken and mixed to obtain molding materials; 2) the molding materials are put in an inner cavity of a die and uniformly spread, and prepressing pre-profiling is carried out; 3) pre-profiling blanks are put in a drying tunnel to be preheated for 1-2 hours to reach the temperature of 115-120 DEG C; 4) preheated pre-profiling blanks are placed in the die to continue to be heated to the temperature of 195 DEG C-200 DEG C, and the grinding wheel is formed through hot pressing; 5) the hot press molding grinding wheel is placed in a drying oven heated to the temperature of 200 DEG C to be solidified for 12 hours and then naturally cooled to the room temperature to be taken out, and a finished product is manufactured. According to the method, toughness of the heavy-load grinding wheel can be improved, cutting heat is reduced, and the cutting ratio is increased.

The invention discloses a movable jaw crusher which aims to solve the defects in current crusher equipment that moving is inconvenient; assembly time for the equipment is long; and an exploitation process is affected. The movable jaw crusher comprises a jaw crusher body, a frame, a material feeder and a conveying mechanism, wherein a traction base is arranged on the front end of the frame; a plurality of wheels are arranged on the frame; the lower end of the frame is provided with a plurality of jacks and a plurality of supports; the lower end of each support is detachably connected with a base; the jaw crusher body and the material feeder are both arranged on the frame; the material discharging opening of the material feeder is arranged corresponding to the material feeding opening of the jaw crusher body; the lower end of the material discharging opening of the material feeder is connected with a fine material outlet; the lower end of the jaw crusher body is provided with a material outlet; and the fine material outlet and the material outlet both face to the conveying mechanism. The movable jaw crusher is of an integral structure; moving is convenient and rapid; assembly at an exploitation site is convenient; and the exploitation process is ensured.

A shoulder damping fastener is disclosed, which comprises a cushion plate and an anchor bolt. A through hole is formed in the cushion plate, the anchor bolt passes through the through hole to fix thecushion plate on the rail foundation; At least two elastic strip seat are arranged on that upper surface of the backing plate; The backing plate is provided with a limiting shoulder for limiting the lateral displacement between the backing plate and the track foundation, and the limiting shoulder is cooperatively connected with a groove arranged on the track foundation. The invention can be applied to the field of rail transit, and the application of the invention can effectively overcome the defects in the prior art, can effectively reduce the overall cost of the fastener and can effectivelyshorten the length of the anchor bolt. Furthermore, the vibration damping technology effect of the double-layer elastomer can be realized.

The invention discloses a stamping and material-taking high-stability mechanical arm. The stamping and material-taking high-stability mechanical arm comprises a base part, a vertical movement module, a swing arm rotary module, a horizontal movement module and an execution end rotary module. The vertical movement module is fixed to a bottom plate to drive the other movement modules to move up and down, and the swing arm rotary module is installed on a driving installation plate and a driven installation plate to drive the horizontal movement module and the execution end rotary module to perform rotary movement; and the horizontal movement module is connected with a harmonic-wave speed reducer to drive the execution end rotary module to perform translation, and the execution end rotary module is installed on a second driving sliding block to drive an execution end rotary shaft and a sucker to rotate. The stamping and material-taking high-stability mechanical arm is steady in transmission, high in stability, compact in structure, high in movement accuracy and large in load.

The invention discloses an automobile silencer inlet pipe assembly and an arrangement structure thereof. The automobile silencer inlet pipe assembly is formed by an inlet pipe, a first bellows, a connecting pipe, a second bellows and an outlet pipe which are connected in sequence. The inlet end of the inlet pipe is provided with a first flange used for being connected with a three-way catalytic converter, and the outlet end of the outlet pipe is provided with a second flange used for being connected with a silencer. The first bellows is arranged below an engine oil pan and a transmission shaft, and the second bellows is arranged above the rear of an auxiliary frame. According to the automobile silencer inlet pipe assembly, vibration generated by an engine and the silencer is effectively eliminated, reliability of a whole exhaust system is improved, and spatial safety distances of the exhaust system and parts such as the engine oil pan, the transmission shaft and the silencer and the heat damage requirements are met.

The invention provides a coupling. The coupling comprises a driving installation end connected with a driving shaft, a driven installation end connected with a driven shaft, as well as a connecting part connected with the driving installation end and the driven installation end, wherein the driving installation end and the driven installation end are respectively provided with a spline, and the periphery circle of the connecting part is provided with a spiral through groove. According to the coupling provided by the invention, the driving installation end and the driven installation end are respectively provided with the spline and are connected with the driving shaft and the driven shaft through the splines, thus being convenient and reliable; the periphery circle of the connecting part connecting the driving installation end and the driven installation end is provided with the spiral through groove, so as to enable the coupling to have a certain elasticity, and when the coupling is under certain impact, the coupling has a certain buffering vibration attenuation action; and the coupling with the elasticity can compensate the coaxiality of the driving shaft and the driven shaft, and when the driving shaft and the driven shaft have an eccentricity phenomenon, the coupling is not twisted off right away. The invention also provides a drive gear box.

The invention relates to a hydro-pneumatic suspension and a mining dump truck. The hydro-pneumatic suspension comprises a cylinder barrel, a cylinder bottom, a piston rod, a first piston, a second piston and an elastic piece, wherein the cylinder barrel is pre-filled with oil gas; the cylinder bottom is arranged at the end part of the cylinder barrel; the first end of the piston rod is movably arranged in the cylinder barrel, and the second end of the piston rod is located outside the cylinder barrel; the first piston is arranged in the cylinder barrel and connected to the first end of the piston rod; the second piston is arranged in the cylinder barrel and located between the first piston and the cylinder bottom; and the elastic piece is connected with the second piston and the cylinder bottom. According to the hydro-pneumatic suspension, double buffering and vibration reduction are achieved through the oil gas and the elastic piece, the reliability is high, and the problem that a vehicle cannot run normally under the conditions of oil gas leakage and vibration reduction failure of a hydro-pneumatic suspension with single oil gas vibration reduction is solved.

The invention discloses an agricultural unmanned aerial vehicle suitable for multi-terrain landing, and relates to the technical field of agricultural unmanned aerial vehicles, according to the technical scheme, the agricultural unmanned aerial vehicle comprises a vehicle body, four sets of undercarriage folding and unfolding grooves are formed in the bottom of the vehicle body, and the two sets of undercarriage folding and unfolding grooves on the same side are distributed in a staggered mode; a first rotating shaft is fixedly installed on the inner wall of each undercarriage folding and unfolding groove, the inner walls of the four undercarriage folding and unfolding grooves are rotationally connected with undercarriages, each undercarriage comprises an outer supporting rod, an electric telescopic rod, a supporting seat, a shock-proof spring and an inner supporting rod, and a driving assembly is fixedly installed at the bottom of each inner supporting rod. And the length of the inner supporting rod is conveniently adjusted through the electric telescopic rod, so that the ground flatness condition during landing of the agricultural unmanned aerial vehicle is conveniently adapted by adjusting different heights of the four sets of undercarriages, the surface of the vehicle body is kept horizontal, and the operation safety of the vehicle body is improved.

A wire saw (100) comprises an installation seat (10), a driving assembly (20), a travelling cutting unloading assembly (30) and a wire collecting assembly (40). The travelling cutting unloading assembly (30) comprises a travelling support (31), a lifting mechanism (32), a diamond string bead wire (33), at least one driven wheel (34) and an unloading mechanism (35), the travelling support comprises a rotary arm (310) and a first supporting arm (311) rotatably connected with the rotary arm (310), and the unloading mechanism comprises a restoring piece (351); and one end of the restoring piece (351) is connected to the travelling support (31), and the other end of the restoring piece (351) is connected to rotary arm (310). When external force acts on the driven wheels (34), the restoring piece (351) is driven by the rotary arm (310) to rotate from an initial area to a rotary area to remove acting force on the driven wheels (34) through the unloading restoring piece (351), the rotary arm (310) is returned to the initial area through the unloading restoring piece (351), and in this way, the problem that components of the wire saw (100) are damaged due to falling off of a cutted object is solved.

The invention discloses a multi-dimensional buffer spherical suspension device. The multi-dimensional buffer spherical suspension device comprises a cab bottom plate, a carframe plate, a suspension ball and a bracket plate, wherein the cab bottom plate is welded to the bottom position of a cab, four corner suspension points are all provided with perforations d3, the perforation d3 is an unthreadedhole, the bracket plate is welded and mounted on the bottom plate position of the cab at the bottom of the four corner suspension point, and vertical plates on both sides of the bracket plate are fixedly welded to the bottom plate position of the cab through fillet welds. According to the multi-dimensional buffer spherical suspension device, a main dimension spring cooperates with a suspension sleeve to bear the main direction vibration fluctuation, an auxiliary dimension spring cooperates with the suspension sleeve to bear the vibration fluctuation of the full-side azimuth dimension, and theentire buffer device can be pre-adjusted according to a load spectrum. The spherical contact between the suspension ball, a suspension pad and a fixed suspension groove increases the buffer damping contact area and improves the buffer damping performance of the entire suspension structure under various working environments.

The invention belongs to the technical field of motors, and particularly relates to a permanent magnet brushless direct current motor. The permanent magnet brushless direct current motor comprises a motor shell, wherein a rotor assembly is arranged in the motor shell and arranged outside a rotating shaft in a sleeving mode to drive the rotating shaft to rotate around the axis of the rotating shaft; a sliding groove cavity is formed in the lower end face of the motor shell, and mounting plates are arranged on the two sides of the sliding cavity; a T-shaped sliding groove is formed in the bottomend face of the mounting plate, and a plurality of connecting holes are formed in the mounting plate; a fixed base is slidably inserted into the sliding cavity, and the upper end faces of the two sides of the fixed base make sliding contact with the lower surface of the mounting plate; I-shaped sliding strips are arranged on the upper end faces of the two sides of the fixed base, and the upper ends of the I-shaped sliding strips are inserted into the T-shaped sliding groove in a sliding mode; a damping cavity is formed in the fixed base, and a damping spring is arranged in the damping cavityin the vertical direction; an elastic buffer column is inserted into the damping spring; the fixed base is made of a closed-cell foamed aluminum material; and the damping spring arranged in the fixedbase can play a role in buffering and damping the brushless direct current motor.

The invention provides a high-rotating-speed starting clutch based on internal engagement of a bevel gear. The high-rotating-speed starting clutch based on internal engagement of the bevel gear comprises a flywheel, an internal bevel gear is welded to the flywheel structure, and the internal bevel gear and the flywheel structure move synchronously. The internal bevel gear can be engaged with the bevel gear under the closing effect of the clutch. The bevel gear is welded to a platen, and the bevel gear and the platen move synchronously. A shock absorber spring is located on the shock absorption portion in a shock absorber. The shock absorber is hollow, and the shaft is sleeved with the shock absorber. A diaphragm spring is mounted between the platen and a clutch cover, arranged on the shaft in a sleeving mode and makes contact with the protruding end of the platen. A release bearing is connected to the clutch cover and arranged on the shaft in a sleeving mode. The shock absorber is provided with a limiting pin. A driving rod is mounted on the platen, and a bearing and punching rod matched with the driving rod is mounted on a flywheel. According to the high-rotating-speed starting clutch, the clutch can be started at a high rotating speed finally based on internal engagement of the bevel gear and the clutch principle and through tight combination of all components; and the high-rotating-speed starting clutch has the characteristics that faults of a control system are reduced, the maintenance cost is low, the structure is simple, and the control stability is good.

The invention discloses a photovoltaic assembly protecting device convenient to mount. The photovoltaic assembly protecting device comprises a base, a placement frame, an electric push rod, a fixed rod, a support plate, a vertical rod, a draining slot, a cover plate, first rotating rods, fixed rods, connecting rods, second rotating rods, a fixed frame, a solar panel, pulleys, first springs, limiting rods, screw rods, second springs and a push plate. The photovoltaic assembly protecting device is simple in structure and convenient to operate; the solar cell can be flatly spread through the rotation of the rotating rods, so that the absorption of optical energy is promoted; after the cover plate is opened, light is reflected to the solar panel through a light reflection mirror, so that the conversion efficiency of the optical energy is improved; and by utilizing a folding manner, the solar panel is not corroded by rainwater in severe weather; by virtue of the sliding connection between the fixed frame and the placement frame, the mounting of the solar panel is promoted; and by virtue of the elastic potential energy of the springs, the damage caused by shaking to the solar panel is avoided, and the buffering and damping effects are achieved, so that the normal work of the solar panel is promoted.

The present invention relates to a low VOC content expansion vibration-reduction rubber, and belongs to the technical field of expansion vibration-reduction. A purpose of the present invention is mainly to solve the problem of high VOC content in the existing expansion vibration-reduction rubber. The low VOC content expansion vibration-reduction rubber is mainly characterized by comprising 10-40 parts of liquid polybutadiene, 2-10 parts of a solid rubber, 5-15 parts of a plasticizer, 3-10 parts of sulfur, 2-10 parts of an accelerator, 0.1-3 parts of an antioxidant, 1-10 parts of an activator, 0.5-3 parts of a foaming agent, 0-1 part of a pigment, and 30-60 parts of a filler. According to the present invention, the VOC content of the expansion vibration-reduction rubber after curing can be significantly reduced while other performances are basically unchanged, the low VOC content expansion vibration-reduction rubber can be widely used for welding and filling between the outer plate and the strengthening beam of the welding wire vehicle body covering member so as to provide the buffer vibration-reduction effect, and volatiles and precipitates do not exist so as not to cause adverse effects on the vehicle body compartment odor.

The invention relates to a vibration-damping temperature-insulation elemental-plate-type ballast-less track structure. The structure comprises a trisection asphalt grading macadam base layer, a rubbermodified asphalt layer and a track panel layer which are laid from bottom to top in sequence; the trisection asphalt grading macadam base layer comprises a grading macadam layer, an asphalt macadam mixture layer, and asphalt concrete mixture layer; the grading macadam layer is laid on filling and a soil base layer. According to the vibration-damping temperature-insulation elemental-plate-type ballast-less track structure, the structure stability of frozen soil can be effectively guaranteed, and the track panel layer can disperse upper loading and make upper loading evenly transmitted downwards; the rubber modified asphalt layer can lower influence of vibration generated by a high speed running train on a lower structural layer, and the effects of buffer and vibration damping are achieved;the void content of the trisection asphalt grading macadam base layer gradually increases from top to bottom, the void content of an upper-layer mixture and a middle-layer mixture is relatively low,the influence of the temperature on a frozen soil layer is insulated, and meanwhile the waterproof effect can also be achieved; the elemental-plate-type track structure is adopted and has the advantages of specific force transmission mode, excellent smoothness and stability, quick repairing and the like.

The invention discloses a reverse marking device for a box-type furnace production line. The reverse marking device comprises a stand column, a material sheet supporting mechanism, a marking mechanismand a double material sheet detection mechanism; the material sheet supporting mechanism comprises a marking table fixing base and a marking plate, and the marking table fixing base is fixedly installed on the top of the stand column; the marking mechanism comprises an impact cylinder, a marking head and a print head used for printing marks, the marking head is connected with a piston rod of theimpact cylinder, the print head is arranged on the upper surface of the marking head, and a cylinder body of the impact cylinder is installed on the stand column through a fixing support plate; and the double material sheet detection mechanism comprises a thickness measuring head and a thickness measuring cylinder. According to the reverse marking device for the box-type furnace production line, the structure is simple, operation is convenient, the size is small, the occupied space is small, the lower surface of a material sheet can be marked without turning the material sheet, the marking efficiency of the material sheet is improved, the hot molding precision of the material sheet can not be influenced, and meanwhile the cost of the box-type furnace production line is reduced.

The invention discloses a flexible gear for a harmonic reducer and a manufacturing method therefor. The flexible gear comprises a thin-wall cup body and a flexible ring; the flexible ring is arranged on one side of an opening of the thin-wall cup body; an outer gear ring is arranged on the side face of the outer circumference of the thin-wall cup body; cavities are evenly formed in the flexible ring; elastic bodies are arranged in the cavities; through holes communicating with the cavities are evenly formed in the end face of the flexible ring; and plugs are arranged in the through holes. The method comprises the steps of pouring device installation, pouring molding, cooling demolding, end cover installation, and heat treatment. A wave generator can directly act on the flexible ring, and the flexible ring drives the outer gear ring and the thin-wall cup body to rotate, so that the service life of the flexible gear can be prolonged, the flexible gear is not prone to damage, and long-term operation under various complex conditions is met; the manufacturing method is simple in step, synchronous pouring molding of multiple flexible gears can be achieved, the machining efficiency is improved, the machining precision and quality of the flexible gear can be improved, the strength of the flexible gear is improved, and the service life is prolonged.

The invention provides a vibration reduction compressor comprising a cylinder body, an adjusting screw plug and a positioning gear. A cylinder hole is formed in the cylinder body, and a high-pressure vibration reduction cavity extending from the end face of the positioning gear to the interior of the positioning gear is formed in the end, close to the adjusting screw plug, of the positioning gear. A throttling device communicating with the cylinder hole and the high-pressure vibration reduction cavity and making gas in the cylinder hole enter the high-pressure vibration reduction cavity is arranged in the cylinder body. By forming the high-pressure vibration reduction cavity and arranging the throttling device, one gas suction and exhaust process is achieved every time a piston of the compressor runs by a circle. During exhaust, most of the high-pressure gas mixed with high-pressure refrigerant and oil in the cylinder hole is exhausted through an exhaust port, a small part of the gas enters the high-pressure vibration reduction cavity of the positioning gear through the throttling device, and therefore the pressure of the high-pressure vibration reduction cavity is gradually increased, the positioning gear can be pushed to be far away from the adjusting screw plug, and the buffering and vibration reduction effects are achieved. No mechanical noise can be generated, and therefore, the noise reduction effect is achieved.

The invention provides a combined foldable and extendable suspension type six-wheel vehicle-mounted mechanism, relating to a foldable and extendable six-wheel vehicle-mounted mechanism. By adopting the mechanism, the problem that a probe vehicle can not simultaneously have a good folding function and superior mobility performance at present is solved. The mechanism is characterized in that a second rod, a sixth rod, a seventh rod and a third rod form a closed rectangle; one end of a fourth rod is hinged with the middle of the sixth rod and the other end thereof is hinged with the middle of the third rod; the second rod and the fourth rod are arranged in parallel; one end of the seventh rod is hinged with one end of a ninth rod by a second rotary locking device; the other end of the ninth rod is hinged with a second wheel; the side wall of the fourth rod is fixedly connected with one end of a guide rail; the guide rail and a slider are locked by a locking pin; the side wall of the slider is fixedly connected with the side wall of a tenth rod; and the tenth rod, an eleventh rod, a twelfth rod, a thirteenth rod and an extension spring form a spring constrained quadrilateral mechanism. The mechanism is used for planetary exploration.

The invention relates to an oil-gas suspension and a mining dump truck. Wherein, the oil-pneumatic suspension includes: a cylinder, which is pre-filled with oil and gas; a cylinder bottom, which is arranged at the end of the cylinder; a piston rod, whose first end is movably arranged in the cylinder, and whose second end Located outside the cylinder; the first piston is located in the cylinder and connected to the first end of the piston rod; the second piston is located in the cylinder and is located in the first piston and the cylinder bottom; and an elastic member connecting the second piston and the cylinder bottom. The oil-pneumatic suspension provided by the invention is double-buffered and damped by oil-gas and elastic parts, and has high reliability, which solves the problem that the vehicle cannot run normally under the condition of oil-gas leakage and vibration-damping failure of the oil-pneumatic suspension with single oil-gas damping.

The invention relates to a small cement concrete oscillation mixer. A mixing shaft penetrating through a mixing drum is arranged in the mixing drum, and the two ends of the mixing shaft are nested in oscillators; the oscillators are nested in the side wall of the mixing drum, and one end of the mixing shaft is connected with a motor through a steel wire soft shaft; the two ends of the steel wire soft shaft are fixedly provided with couplings, and a plurality of mixing blades are fixedly arranged on the mixing shaft. The two ends of the mixing shaft are provided with the oscillators, so that the device changes with a certain frequency and a certain amplitude band, and the frequency and the amplitude constantly change; the mixing shaft slightly swings left and right due to uneven force of the blades, and the noise is reduced; a mixed material is evenly mixed, concrete is fully and quickly mixed and the content of gas of the concrete is increased, and the quickly mixed material is evenly mixed. The motor is used, so that energy is saved. The device is suitable for large-area popularization and use.

The invention provides a bogie for a track maintenance machine and the track maintenance machine. The bogie for the track maintenance machinery comprises a framework, a swing bolster, a swing bolster platform, a lifting rod and a traction pull rod, wherein the side bearing and a central pin seat are arranged on the swing bolster; the side bearing is in contact with a train body so as to support the train body; the central pin seat is provided with a vertical pin hole; a central pin of the train body is threaded in the pin hole; the swing bolster platform is arranged at the bottom of the swing bolster; a first spring device, which is vertically arranged, is connected between the swing bolster platform and the swing bolster; the lifting rod is vertically arranged, connected between the swing bolster platform and the framework and is used for enabling the swing bolster platform to swing relative to the framework; and the traction pull rod is arranged in a longitudinal direction of the framework and is connected between the swing bolster and the framework. According to the invention, the stability and comfort of the track maintenance machine during high speed running can be improved.

The invention discloses a hydraulic rock drill anti-air strike buffer system, which includes a cylinder body, and a reciprocating piston is arranged in the cylinder body, and is characterized in that a buffer device for buffering the impact force of the piston stroke is arranged on the piston. The rear of the cylinder body is provided with a return stroke buffer device for buffering the impact force of the piston return stroke. The present invention adopts a wear-resistant material for the middle piston, and the surface is chrome-plated, which enhances the wear resistance and corrosion resistance of the piston; , the entire front cavity of the piston will be filled with cushioning and vibration reduction during the impact of the piston. The setting of the buffer ring can prevent the piston from directly contacting the front sleeve when the impact occurs. The effect of cushioning and vibration reduction is achieved under the double action of disc spring and disc spring.

The invention discloses a controllable self-protecting small tethered ejection release mechanism, which comprises a satellite simulator, an ejection separation module, a tether cutting module, a tension control module, a bobbin base module and a base platform, and can effectively simulate tethered satellites The entire release process of the star includes ejection separation, tension control, tether cutting, state measurement and buffering and vibration reduction; the unique ejection drive structure is adopted, which makes the ejection part smaller than the previous research, and the reliability performance is also significantly improved. When a special situation occurs, the electric heating material cutter in the tether cutting module can cut the tether faster and more effectively; the braking method adopted in the tension control module can control the tension of the tether more effectively and smoothly; the spool base module can effectively Non-contact detection of the length and speed of the tether, and at the same time, it can play a good role in buffering and damping at the end of the release.