182results about How to "Solve the difficulty of disassembly" patented technology

The invention relates to a pipeline delivery pump, which is suitable for the pipeline delivery of crude oil and natural gas and the sea water transportation in long distance in the field of desalination of sea water. The pump comprises a pump body, an impeller, a shaft, a left bearing device and a right bearing device; the impeller is arranged on the shaft in the pump body; two ends of the shaft extending out of the pump body are respectively provided with the left and right bearing devices which are connected with the pump body; the shaft end of the right bearing is connected with the outputshaft of a motor; two ends of the shaft are respectively provided with an axial hole; a shaft platform is arranged on the shafts of the first bearings of the left and right beating devices; and a circular groove is arranged in the middle of the shaft platform; and any part of the circumference of the circle groove is provided with a radial hole communicated with the axial hole. In the invention, the problems of difficult disassemble of the pipeline delivery pump bearing and unbalanced axial force are solved, and the bearing is extremely convenient and rapid to disassemble and maintain, a great amount of time is saved, and the work efficiency is greatly improved; and in addition, the impact of the axial force to the bearing is reduced and the service life of the bearing is improved by improving the structure of the bearing device.

The invention discloses a special disassembly tool for withdrawing a bolt. The special tool comprises a thread removing drill used for being connected with and hooking the bolt, and the cutting edge of the thread removing drill are provided with three parts which achieve the effects of drilling and centering, bolt hooking and rotation torque increasing respectively. The other end of the thread removing drill is placed in a hole of a rotary connecting rod, and a locking nut on the rotary connecting rod is used for conducting fastening and locating on the thread removing drill. The rotary connecting rod is in directional connection with a clamping handle through a connecting nut and threads and is used for limiting the rotary connecting rod. A stop steel ball, a pressure adjusting spring and a pressure adjusting nut are installed on the clamping handle. Through adjustment of the pressure adjusting nut, the pressure adjusting spring can generate positive pressure on the stop steel ball. The stop steel ball and the rotary connecting rod are matched in thread. The special disassembly tool for withdrawing the bolt is convenient to use, is not limited by disassembly places or the sizes of workpieces and can be used for disassembling bolts of various specifications by changing the specification of the thread removing drill. The special disassembly tool for withdrawing the bolt is compact in structure, has the self-locking overload protection function and can conduct overload protection on operators.

The invention relates to the technical field of construction equipment, in particular to a nut quick-disassembling tool suitable for a small-spacing construction space. The nut quick-disassembling tool suitable for the small-spacing construction space comprises a rack, a motor, a belt, a supporting wheel and a driving wheel, wherein the supporting wheel and the driving wheel are arranged on the rack; the motor is in driving connection with the driving wheel; and the belt is arranged on the supporting wheel and the driving wheel and is opened by the supporting wheel and the driving wheel so asto form a space for a nut to sleeve in. During use, the belt sleeves the nut, the tool is started to outwards pulled, the motor is utilized for driving the belt, and the nut is rotated through a friction force of the belt and the nut, so that a disassembling function is realized, and the nut quick-disassembling tool suitable for the small-spacing construction space is particularly suitable to be used for the situation that the spacing between the nut and a peripheral solid object is too small.

The invention discloses an assembled paying-off pulley. The assembled paying-off pulley comprises a pulley body and a rubber liner arranged on the pulley body, wherein the pulley body mainly comprises at least two sliding pulley blocks; adjacent sliding blocks are connected with each other through threads; the rubber liner is in interference fit with a pulley groove of the pulley body; and moreover, the contact surface between the pulley groove and the rubber liner is a combination surface with roughness. According to the assembled paying-off pulley, the rubber liner is in interference fit with the pulley body, and the rubber liner is sleeved on the pulley body instead of being formed by hot-pressing and bonding, so that the rubber liner is convenient to replace after being damaged, and can be replaced manually without using related equipment; and troubles of replacing by entrusting a specialized manufacturer are avoided, and furthermore, the replacement of the pulley can be finished at a construction site.

The present invention is an electromagnetic shielding device which is set on a printer circuit board. The electromagnetic shielding device includes a covering part and a conductive rubber casing. The covering part is composed of one conductive material, and includes a covering board and sidewall connecting to the covering board around. The sidewall extends to the printed circuit board, and has a inside surface, an outside surface relative to the inside surface, and at least one throughout hole. The conductive rubber casing covers the inside and outside surfaces of the sidewall, and fills the throughout hole with part of itself which fixes the casing on the sidewall. The conductive rubber casing also contacts to the printed circuit board, establishing an electrical connect with an earth terminal of the circuit board. The covering part and conductive rubber casing forms an enclosure space to envelop the electrical components integrated on the printed circuit board, and keep them from the disturbance of electromagnetic wave.

The invention provides a construction structure and a construction method for mounting a large-diameter steel pipe through adopting a shield tunnel. The construction structure comprises a steel pipe mounting tunnel formed by shield construction, the steel pipe and a concrete supporting structure, wherein the concrete supporting structure comprises a concrete pouring platform, an arc-shaped concrete base and a plurality of steel supports. The construction method is characterized in that before the steel pipe is transported, a track at the bottom of the shield tunnel is removed and cleared away,then concrete is poured to form the horizontal supporting platform, then the steel pipe is transported into the shield tunnel through trackless transportation equipment, and erected through the steelsupports, then a formwork is constructed again, steel bars are laid, and then the concrete is poured to form the arc-shaped concrete base covering the lower part of the steel pipe. According to the construction method, the shield tunnel is used for pipeline mounting, the influence on an urban building in the steel pipe burying process is avoided, the concrete pouring platform is adopted for steelpipe transportation, the disassembling and mounting process of the track is avoided, the construction process is simplified, the overall construction is convenient, and the construction period is greatly shortened.

The invention discloses a quick disassembly and assembly device for a heavy-duty vehicle track. A sleeve disassembling screw corresponding to an end coupling fixing screw is sleeved on an output shaft of a doubling spanner; and a pull claw bracket only provided with an internal thread is screwed on a hydraulic cylinder, one end of each of two pull claws is connected to the pull claw bracket, and the other ends of the pull claws are connected by using threads through a pull block with a proper size respectively and arranged on a track end coupling; and during working, a thin ejection rod fixed on an ejection piston rod provided with the hydraulic cylinder is ejected from a screw hole of the end coupling, and then the rear end of the hydraulic cylinder is shaken to add hydraulic oil into an ejection cylinder so as to push the ejection piston rod to advance and eject a blocking pressure block on the end coupling. The other pull claw bracket only provided with an internal thread is screwed on a hydraulic cylinder, one end of each of two pull claws is connected to the pull claw bracket, and the other ends of the pull claws are connected by using threads through a connecting pull plate with a proper size respectively; and during working, the ejection end provided with hydraulic cylinder is ejected on two shaft pins of the track through two symmetrical ejection rods, the connecting pull plate is inserted into a gap between two track plates, two ends of the connecting pull plate are connected to the two pull claws through bolts, and then the rear end of the hydraulic cylinder is shaken to add hydraulic oil into the ejection cylinder so as to push the ejection piston rod to advance and fulfill the purpose of pulling out the end coupling.

The invention provides an electric operating mechanism of a circuit breaker. The electric operating mechanism comprises a housing, a transmission shaft, a driving device, a striking device, a position detection device and an electric control device, wherein the position detection device comprises a switch-on position detection device, a switch-off position detection device and a free position detection device; the switch-on position detection device and the switch-off position detection device are arranged on the two sides around the transmission shaft; and the free position detection device is arranged at the driving device far away from the transmission shaft. Distribution of the position detection devices is relatively disperse; the position detection devices are free from false detection when a first detection object and a second detection object are respectively detected; and a detection range is large due to the arrangement manner of the position detection devices.

The invention relates to a front cover decorating element for an automobile, which comprises a front cover decorating element body. The upper end of the front cover decorating element body is provided with a sealing strip, and the front cover decorating element body is connected with the sealing strip mutually by adopting a hook pressing structure. The hook pressing structure forms an upward bent lug boss at the upper edge of the front cover decorating element body, a downward bent hook groove is correspondingly formed at the edge of the sealing strip, and the hook groove is mutually hooked with the lug boss; and a groove is formed on the front cover decorating element body close to the back of the upper edge, a protrusion is correspondingly formed on the inner lateral surface of the sealing strip, and the protrusion is pressed in the groove. Compared with the prior art, the decorating element has the advantages of simpler structural manufacturing technique, lower production cost, and quite convenient after-sales service and replacement.

The invention discloses a structure capable of mounting and dismounting a balancing weight automatically by a tower crane. The structure comprises a lifting mechanism (11), a lifting pulley (12), an automatic balancing weight device (14) and a steel wire rope (13), wherein the lifting mechanism is installed on a balance arm (16); the automatic balancing weight device (14) comprises a support (21), a first upper pulley (22) and a second upper pulley (23) which are installed on the support (21), a lower pulley (24) which is positioned below the first upper pulley (22) and the second upper pulley (23) and is connected with a balancing weight (15); the steel wire rope (13) starts from the lifting mechanism (11), sequentially bypasses the lifting pulley (12), the second upper pulley (23), the lower pulley (24) and the first upper pulley (22), winds back and is fixed on the lifting mechanism (11). The lifting mechanism of the tower crane acts as a power source, so that the balancing weight can be stably and conveniently mounted and dismounted.

An automatic powder discharging water jet capable of realizing one-way filtering and high-low pressure water flow conversion comprises a rod and a drill bit. A screw conveyer is arranged on the outer wall of the rod, the drill bit is connected with the rod, a center channel is formed in the rod and used for circulation of water flow, a plurality of jet flow sprayers penetrating the side wall of the rod are arranged at the tail end of the rod, female connectors are arranged at two ends of the rod, annular limit projections are arranged at the connecting positions of the tail of the center channel and the female connectors, the rod is connected with the drill bit through a rod-shaped connector with a center through hole, the tail end of the connector is connected with the head end of the rod in a screwed manner, a one-way valve is arranged in the through hole at the tail end of the connector, water flow unidirectionally flows into the drill bit through the one-way valve, the head end of the connector is inserted into the drill bit through a rod-shaped connection portion, a filter screen is arranged in a center through hole of the head end of the connector, a limit pin for fixing the drill bit is arranged on the side wall of the rod-shaped connection portion, a high-low pressure water flow conversion mechanism is arranged on the rod and positioned in the center channel among the connectors and the annular limit projections. The water jet is simple in structure and high in efficiency.

The invention discloses a torque control type nut. The torque control type nut comprises a nut inner bushing and a nut jacket, wherein the nut inner bushing is made of a material in which low-carbon steel is subjected to hot dip galvanizing on the surface, the nut jacket is made of a POM material, the outer border of the cross section of the nut jacket is in the shape of a regular polygon, the inner border of the cross section of the nut jacket is round, the inner wall face of the nut inner bushing is provided with a thread structure, the outer border of the cross section of the nut inner bushing is round, two symmetrical first ridges are arranged on the inner wall face of the nut jacket, at least one pair of grooves are formed in the outer wall face of the nut inner bushing, the first ridges are arranged on the axis of the nut inner bushing, the grooves are formed in the axis of the nut inner bushing, and each first ridge is arranged in the corresponding groove. A spanner special for the torque control type nut comprises a hand holding handle, wherein a first spanner head is arranged at one end of the hand holding handle, a second spanner head is arranged at the other end of the hand holding handle, a first sleeving hole is formed in the first spanner head, a second sleeving hole is formed in the second spanner head, the inner wall face of the first sleeving hole is a hole in the shape of a regular polygon, the second sleeving hole is a round hole, and a pair of second ridges are arranged on the inner wall face of the round hole. The torque control type nut and the spanner special for the torque control type nut have the advantages that bolts are prevented from getting loose, and the antitheft function is achieved.

A thermal correcting connection assembly comprises a connection rod, a cotter pin, a clamping hoop, a clamping ring and an adjusting pad, wherein the clamping hoop is embedded in an installing groovein the upper end of the connection rod in a sleeved manner, and the clamping ring is arranged on the peripheral surface of the clamping loop in a sleeving manner; and the cotter pin penetrates the clamping ring, the clamping loop and the connection rod to fixedly connect the clamping ring, the clamping loop and the connection rod. The interval between the thermal correcting connection assembly andthe surface of a connected piece is adjusted through the adjusting pad. During thermal correcting, the thermal correcting connection assembly is inserted into a connection hole of the thermal correcting tool to be connected with the thermal correcting tool, the adjusting gasket is selected according to the actual distance between the installing groove of the connection rod and the work face of the thermal correcting tool, the clamping hoop is installed in the installing groove of the connection rod, the outer side of the clamping loop is sleeved with the clamping ring so that the clamping loop can be fixed, finally, the cotter pin is inserted into a through hole of the clamping ring, the clamping hoop and the connection rod, and the clamping ring, the clamping hoop and the connection rodare connected into a whole. The thermal correcting connection assembly achieves the purpose of connection of the thermal correcting tool, the disassembling difficulty, caused by thermal correcting, ofthe thermal correcting tool can be avoided, the production efficiency is improved, and the production cost is reduced.

The invention discloses an assembling and disassembling tool for a switching-on spring of a vacuum circuit breaker. The assembling and disassembling tool comprises a horizontal rod; a U-shaped fork is arranged at the front end of the horizontal rod; an operation rod is hinged to the horizontal rod and provided with a supporting block. A groove is formed in the operation rod in the axial direction, and the lower end of the supporting block is arranged in the groove and fastened by a bolt. A first insulation sleeve is arranged at the rear end of the horizontal rod, a second insulation sleeve is arranged at the rear end of the operation rod, and a third insulation sleeve is arranged outside the supporting rod. The problem that in the coil replacement process, an outer switching-on spring is difficult to assemble and disassemble is avoided, and working efficiency is improved. By applying the lever mechanics principle and combining with a handcart framework structure, single-person operation can be achieved, and working efficiency is improved by many times. The safety factor is high, and the accidents of spring collapsing and spring sliding can be completely prevented.

The present invention relates to a new energy vehicle battery box. The box comprises a bottom shell and an upper cover positioned and clamped on the bottom shell. The space formed by the bottom shelland the upper cover is provided with at least three sandwich plates used for placing new energy batteries. The front side of the bottom shell is provided with a positive electrode interface and a negative electrode interface, the surrounding of the bottom shell is provided with installing bars, and the installing bars are provided with positioning holes. The center position of the front side of the bottom shell is provided with a maintenance switch frame, the left side and the right side of the bottom shell are provided with heat-dissipation windows separately, the surrounding of the inner bottom of the bottom shell is provided with position-limitation holes, and the bottom shell is provided with positioning columns matched with the upper cover. The upper cover is provided with installingholes matched with the positioning holes on the installing bars, the lower end of each sandwich plate is provided with installing columns clamped with the position-limitation holes, wherein the installing columns are matched with the position-limitation holes, and each sandwich plate is provided with hot resistance wires. The box can improve the heat-dissipation capacity of the battery box, when the temperature is too low, the box can provide proper heat for the batteries, the problem of difficulty of battery disassembly and assembly is solved, and the space utilization rate of the battery boxis improved.

The invention relates to a plug of wire terminal, which arranges first plug at the frame of heat radiator. Wherein, the first plug is connected to the wire of motor stator of heat radiator and fixed on then frame; the side edge of first plug has clamping pins around; the part of frame relative to the clamping pins has clamping returning holes fixing the clamping pins. The invention can confirm the fixing position of first and second plugs, and the terminal can quickly detach.

The invention discloses a fastener disassembly spanner. The fastener disassembly spanner comprises a first holding rod taking the shape of a hollow pipe, a swing rod hinged to one end of the first holding rod, a ratchet mechanism arranged at the other end of the first holding rod and provided with a clamping port capable of clamping a fastener, and a stay wire connected to the ratchet mechanism by one end and connected with the swing rod by the other end after penetrating through the first holding rod so as to enable the ratchet mechanism to perform an intermittent equidirectional movement through the swing rod. The swing rod and the ratchet mechanism connected through the stay wire are respectively arranged at the two ends of the first holding rod, so that the clamping port on the ratchet mechanism can disassemble the fastener; the structure is reliable; the operation is convenient and flexible; on the one hand, the trouble of incapability of smoothly disassembling the fastener by a general spanner due to the operation space limitations in the maintenance and production process can be removed; and on the other hand, the disassembly difficulty caused by the working body limitations of operators is effectively solved; and the fastener disassembly spanner can be suitable for various complex environments.

The invention provides an integrated touchpad fixing device. The central axis of the C surface of the notebook is arranged perpendicular to the horizontal plane. Fixing piece, the limit fixing piece is fixed together with the touch circuit board through solid glue, and the touchpad is fixed by adding solid glue. It is time-consuming and labor-intensive to complete the assembly process. In addition, the design makes the button feedback soft during the use of the user, which solves the problem of difficult disassembly of the traditional notebook computer, and the addition of the limit fixing piece realizes the fixation of the touchpad. It solves the problem that the solid glue is in direct contact with the casing during the installation process. In addition, the touchpad film is added to facilitate the protection of the touchpad, thereby preventing the damage of the touchpad.

The invention is set up on a PCB. The electromagnetic shielding device comprises a frame and a cap. Said frame sits on the PCB and is made of metal material. Said cap is made of electroconductive rubber. The combination of the frame and the cap forms a sealed room to cover the electronic components on the PCB.

The invention discloses a vacuum heat insulation pipeline plug-in type connector and a connecting method thereof. The vacuum heat insulation pipeline plug-in type connector comprises a female plug and a male plug, wherein the female plug comprises an outer pipe and an inner pipe; a heat insulation material is wound on the interlayer of the outer pipe and the inner pipe; the male plug comprises a first outer pipe, a second outer pipe and an inner pipe; the heat insulation material is wound on the interlayer of the first outer pipe and the inner pipe; the interlayer of the outer pipe and the inner pipe of the female plug is communicated with the interlayer of connected pipe sections, and vacuumized; the interlayer of the first outer pipe and the inner pipe of the male plug is communicated with the interlayer of the connected pipe sections, and vacuumized; the second outer pipe of the male plug is plugged into the inner pipe of the female plug; and pipe section sealing sections of the female plug and the male plug are matched with each other by using materials with different heat expansion and cold contraction coefficients. In the mode, the vacuum heat insulation pipeline plug-in type connector is high in sealing performance and heat insulation performance under cryogenic working conditions; the simple and convenient plug-in type connection of vacuum heat insulation pipe sections is effectively realized; and the vacuum heat insulation pipeline plug-in type connector is great in economic benefit and using value.

The invention discloses a combined vertical wear-resistant roller which comprises a conical grinding roller body. A plurality of through grooves extending in the axial direction are distributed in the outer circumference face of the grinding roller body. Hook grooves are formed in positions, close to the small end of the grinding roller body, in the through grooves. An annular baffle is arranged at the large-opening end of the outer circumference face of the grinding roller body. Two positioning through holes corresponding to each through groove are formed in the annular baffle, wherein a bolt is inserted in one positioning through hole, and the head of the bolt is located in the corresponding through groove. A plurality of sector wear-resistant blocks are distributed on the outer circumference face of the grinding roller body. The lower surfaces of the small ends of the sector wear-resistant blocks are provided with hooks which extend downwards and are matched with the hook grooves. The large ends of the sector wear-resistant blocks are provided with limited posts and bolt clamping grooves. The hooks of the sector wear-resistant blocks are hooked in the hook grooves. The limited posts of the sector wear-resistant blocks are inserted in the positioning through holes. The heads of the bolts stretch in the bolt clamping grooves and are locked through nuts. The machining difficulty of the wear-resistant blocks is lowered, the yield is increased, and cost is reduced.

The invention relates to automobile exhaust treatment equipment for pollution abatement and an automobile exhaust treatment method. The automobile exhaust treatment equipment comprises an exhaust pipe, fixed mechanisms, a connecting pipe and a treatment mechanism. The fixed mechanisms are mounted on the right side of the exhaust pipe. The connecting pipe is mounted on the right side faces of the fixed mechanisms. The treatment mechanism is mounted on the right side face of the connecting pipe. The three fixed mechanisms are evenly arranged in the circumferential direction of the exhaust pipe.Each fixed mechanism comprises a fixed barrel. The fixed barrels are mounted at the right end of the side wall of the exhaust pipe. The inner side wall of each fixed barrel is in a step shape from left to right, and the step on the rightmost side of the inner side wall of each fixed barrel is of an arc structure. A limiting electric push rod is mounted on the right side of the inner side wall of each fixed barrel. According to the automobile exhaust treatment equipment for pollution abatement and the automobile exhaust treatment method, the problems that equipment mounting and demounting difficulty exists in automobile exhaust treatment equipment under the existing technical conditions, and a filter screen of the treatment equipment is short in service life, frequent in replacement and high in use cost can be solved; the function of automobile exhaust treatment can be achieved; and the advantages that the exhaust treatment equipment is convenient to mount and demount, and a filter screen is long in service life and low in use cost are achieved.

The invention relates to a dismounting device for an internal rubber mixer rotor bearing. The dismounting device comprises a frame, a lifting screw, an oil cylinder, a hydraulic pump, a master jaw body, a master jaw, jaws and hooks, wherein the frame is provided with a sliding groove, the lifting screw is mounted on the frame, the oil cylinder is fixedly connected with the bottom of the lifting screw through a sliding plate, the hydraulic pump is used for driving the oil cylinder to actuate, the master jaw body sleeves the front end of the oil cylinder, the three master jaws are uniformly distributed on the outer surface of the master jaw body and are provided with hollow groove bodies, the three jaws are in sliding connection with the hollow groove bodies of the three master jaws respectively, and the three hooks are respectively mounted at the front end of the three jaws. The dismounting device has the beneficial effects that the bearing dismounting efficiency during replacing and assembling an internal rubber mixer rotor bearing can be improved; the height and the diameter can be regulated, so that the dismounting device can be used by internal rubber mixers of different types; a three-jaw structure is uniformly distributed at the peripheral direction of the bearing during dismounting, so that the stress is uniform, and the bearing cannot be damaged.

The invention relates to a quick connecting mechanism used for a robot modular joint. The mechanism comprises a shell. The shell is matched with a flange. An internal conical surface is arranged on the shell in the circumferential direction. An external conical surface matched with the internal conical surface is arranged on the flange in the circumferential direction, and the taper of the external conical surface is the same as that of the internal conical surface. A plurality of fitting screws are arranged between the shell and the flange, are perpendicular to the generatrix direction of theinternal conical surface and provide pretightening force so that the internal conical surface and the external conical surface can be in tight fit. By adopting the matched conical surfaces and the screws for fastening, the problems of positioning and direct shear on the screws, arising from adopting of radial screws for connecting can be avoided, the problems of difficult mounting and low efficiency caused by connecting by means of axial screws can be solved, and the problem of a complex machining process caused by end tooth connecting can be avoided.

The invention provides a battery pack structure and an electric vehicle, and relates to the technical field of a battery structure of the electric vehicle. The battery pack structure comprises a negative electrode aluminum row, a lower supporting frame, a cell, an upper supporting frame and a positive electrode aluminum row, wherein the negative electrode aluminum row is fixedly connected with the lower supporting frame; the lower supporting frame is fixedly connected with the upper supporting frame; the upper supporting frame is fixedly connected with the positive electrode aluminum row; and the cell is fixedly mounted between the lower supporting frame and the upper supporting frame. According to the scheme, the cell and the positive electrode aluminum row and the negative electrode aluminum row are in tight contact, so that small deformation and low cost are realized; and meanwhile, the assembling difficulty and detaching difficulty of the battery pack are lowered, and relatively low vibration resistance and relatively low contact resistance are realized.

The invention discloses a power take-off at the rear end of an engine, which includes a power take-off input end, a power take-off output end and a power take-off housing. A bearing cavity for installing a bearing is arranged inside the power take-off housing. The power take-off housing can be embedded in the flywheel housing and can be detachably connected with the flywheel housing, and the part of the power take-off housing embedded in the flywheel housing is provided with the bearing cavity Connected lubricating oil passage. Since its housing can be embedded in the flywheel housing and is detachably connected with the flywheel housing, it effectively solves the problem of difficult disassembly and assembly of the power take-off at the rear end of the engine at present. The part of the flywheel housing is also provided with a lubricating oil channel that communicates with the bearing cavity in the PTO housing, so as to realize direct lubrication inside the PTO. Compared with the current way of using external oil channels to lubricate the internal bearings of the PTO, Not only the installation space inside the engine is saved, but also the production cost is reduced.

The invention discloses a new energy battery cover plate convenient in assembling. The new energy battery cover plate comprises a cover plate body, wherein the bottom of the cover plate body is provided with a groove; a first anti-explosion diaphragm is fixed in a groove opening; the cover plate body is also provided with a buffer hole; the buffer hole is communicated with the inner side of the groove; the surface, which is in contact with the inner part of the groove, of the buffer hole is provided with a second anti-explosion diaphragm; the first anti-explosion diaphragm and the second anti-explosion diaphragm surround the inner part of the groove to form an anti-explosion buffer cavity; the bottom surface of the cover plate body is also provided with one ring of annular convex strip; the outer wall of the annular convex strip is provided with a thread. According to the new energy battery cover plate, the problems that a traditional new energy battery cover plate is difficult in installation and disassembling and a pressure-relief anti-explosion function can not be performed on the new energy battery.

The invention discloses a control system of a Rome rod curtain opening and closing device. The control system comprises an MCU module, a wireless radio frequency module, an illumination sampling module, a driving module and a detection module. The MCU module is connected with the wireless radio frequency module, the detection module, the illumination sampling module and the driving module. The control system has the following advantages that the control system has the mode of automatically opening and closing according to the sensed illumination intensity, under the mode, when the light is sensed to be weak, the curtain opening and closing device is controlled to operate in the forward direction, open the curtain and improve the indoor light intensity, and when the light is sensed to be strong, the curtain opening and closing device is controlled to operate in the reverse direction and close the curtain, and reduce the indoor light intensity. in addition, the opening and closing degree of the curtain can be controlled according to the sensed light intensity, the curtain can be controlled to be partially closed to be completely closed from weak light to strong light, the curtain can be controlled to be partially opened to be completely opened from strong light to weak light, and the indoor light is ensured to be at the proper degree to the maximum extent.

The invention discloses a power takeoff at the rear end of an engine. The power takeoff comprises a power takeoff input end, a power takeoff output end and a power takeoff housing, wherein a bearing cavity, in which a bearing can be mounted, is formed in the power takeoff housing; the power takeoff housing can be arranged on a flywheel housing in an embedded manner, and is in detachable connection with the flywheel housing; a lubricating oil channel communicated with the bearing cavity is arranged at the part, embedded in the flywheel housing, of the power takeoff housing. As the power takeoff housing can be arranged on the flywheel housing in an embedded manner, and is in detachable connection with the flywheel housing, the problem that the power takeoff at the rear end of the engine is difficult to dismount and mount in the prior art is solved; as the lubricating oil channel communicated with the bearing cavity in the power takeoff housing is arranged at the part, embedded in the flywheel housing, of the power takeoff housing, the interior of the power takeoff can be lubricated directly; compared with the conventional method in which the bearing in the power takeoff is lubricated by adopting a circumscribed oil passage, not only the inner mounting space of the engine but also the production cost are reduced.