46results about How to "Guaranteed fit clearance" patented technology

The invention relates to a water-cooled engine body, in particular to an air cylinder body of a wet-type cylinder liner engine. The air cylinder body comprises a cylinder body and a cylinder liner, and is characterized in that an upper positioning belt and a lower positioning belt are arranged on the cylinder liner; the inner surface of the cylinder body is provided with a convex ring; a cooling water channel formed between the lower positioning belt and the convex ring is used as a first cooling chamber; the cooling water channel formed between the convex ring and the upper positioning belt is used as a second cooling chamber; the cooling water channel formed over the upper positioning belt is used as a third cooling chamber; the cross-sectional area of the second cooling chamber is less than that of the first cooling chamber; and the cross-sectional area of the third cooling chamber is less than that of the second cooling chamber. The invention has the advantages that the air cylinder body can raise the flow velocity of cooling liquid, increase the flow rate of the cooling liquid, raise the heat dissipation rate of a high-temperature area, ensure that the whole cylinder liner is uniform in temperature, guarantee normal fit clearances among parts of the cylinder body and guarantee the normal work of the engine.

The invention relates to a central oil distributor for a rotary machine tool, comprising an oil distributor casing and a mandrel arranged in the oil distributor casing, wherein a blowing and cleaning mechanism, an oil cylinder clamping mechanism, an oil cylinder loosening mechanism, an auxiliary support mechanism, a tapered pin locking mechanism and a tapered pin loosening mechanism are arranged on the mandrel from top to bottom. The central oil distributor disclosed by the invention has the beneficial effects of realizing various functional requirements of the machine tool, reducing the costas much as possible, improving the machining manufacturability of parts, improving the precision of the parts and being convenient for operation and maintenance.

The motorcycle tail lamp base comprises the base body with sealed slot outside the base with protruding light block rib. It can be installed from inside the covering piece to outside, through setting a ring of extending light block rib to avoid the impurities inside the vehicle to effectively solve the issue of light leakage to ensure the convenience for light bulb change.

The invention discloses a ground wire assembly comprising a main rod body and an auxiliary rod body which are arranged in parallel. The top end of the main rod body is provided with a fixing head restraint matched with a wiring terminal. The top end of the auxiliary rod body is provided with a movable head restraint clamped and matched with the fixing head restraint. A guiding aperture is arranged in the fixing head restraint along an axial direction of the main rod body. The tail end of the movable head restraint is movably inserted in the guiding aperture and is in hinged connection with the auxiliary rod body. The middle portion of the main rod body is provided with an adjusting gear in a rotatable mode. The axis of the adjusting gear is perpendicular to the axis of the main rod body. A matched surface between the tail end of the auxiliary rod body and the main rod body is provided with a tooth bar engaged with the adjusting gear in a matched mode. The connection structure of the ground wire assembly is safe and reliable, and the operation process is simple to perform.

The invention discloses a cooling pump of a machine tool. An impeller is in a full-open vortex long-blade structure; the blade length is 1 / 6-1 / 4 of the outer diameter D2 of the impeller; an axial clearance d1 between the impeller and a pump body is 0.1-0.3mm; annular bulges are arranged on a pump cover and used for adjusting an axial clearance d2 between the pump cover and the impeller to be 0.1-0.3mm; a water inlet is formed in the pump body, and takes a cut-water position A as a starting point circumferentially; and a radial position of the water inlet corresponds to a blade area of the impeller. According to the cooling pump of the machine tool, the novel vortex impeller is strictly matched with the pump cover and the end face of the pump body, and the matched clearances between the impeller and the pump cover and between the impeller and the pump cover are ensured, so that a small-flow and high-lift cooling liquid conveying requirement is met; the efficiency is improved; a distance from the water inlet to the bottom of a cooling liquid box can be shortened with the increasing of a lift; a use ratio of cooling liquid is increased; the characteristic requirements on the efficiency, small flow and high lift are met; and the cooling pump can be widely applied to cooling of the machine tool.

The invention discloses a laser repair method for a hub tenon tooth of a heavy-duty gas turbine. The laser repair method comprises the following steps: 1, detecting damage situations; 2, determining maintenance contents; 3, formulating a process scheme; 4, pre-treating a damaged part, detecting a tongue-and-groove damage surface, and determining the maintenance process sequence; 5, protecting a non-laser cladding surface; 6, performing laser cladding processing; and 7, performing examination after repair. The process parameters of laser cladding and the ratio of all element ingredients in a powder material are optimally designed to clad crack-free and impurity-free compactly-textured wear-resistant alloy powder in the hub tenon tooth tongue-and-groove of the heavy-duty gas turbine, so that the service life of the heavy-duty gas turbine is prolonged.

The invention discloses a stator iron core overlaying welding mold. A stator iron core comprises a stator upper pull ring, a stator lower pull ring, a stator punching piece and multiple stator pull plates; the stator punching piece is arranged between the stator upper pull ring and the stator lower pull ring; the multiple stator pull plates are uniformly distributed at the outer periphery of the stator punching piece; the welding mold comprises an upper pressing plate, a lower pressing plate, an inner mold and an outer mold; the inner mold and the outer mold are arranged between the upper pressing plate and the lower pressing plate; the outer mold comprises multiple fan-shaped blocks; the fan-shaped blocks are as many as the stator pull plates; the inner surfaces and the outer surfaces ofthe fan-shaped blocks are arcs; the multiple fan-shaped blocks are uniformly arranged at the outer periphery of the inner mold; limiting pieces are arranged at the outer peripheries of the multiple fan-shaped blocks; the outer surface of the inner mold is an inner mold conical surface; the inner surfaces of the fan-shaped blocks are outer mold conical surfaces matched with the inner mold conical surface; and the outer surfaces of the fan-shaped blocks are matched with the inner surface of the stator punching piece. The reversible deformation is only applied to welding deformation positions ofthe stator pull plates, so that the welding deformation is effectively counteracted, and the inner circle roundness of the stator iron core can be guaranteed.

The invention discloses a liquid expansion mandrel, which comprises a mandrel. The mandrel includes a mounting section and a liquid expansion control section respectively located at two ends, and a workpiece clamping section is arranged between the installation section and the liquid expansion control section. A collar for limiting the workpiece is provided between the workpiece clamping section and the installation section; a liquid expansion center hole is provided in the mandrel, and a liquid expansion thin film is set on the workpiece clamping section. A wall sleeve, a liquid expansion communication hole is provided between the liquid expansion center hole and the liquid expansion thin-walled sleeve; the entrance of the liquid expansion center hole is located on the end surface of the liquid expansion control section, and the liquid expansion center The hole includes a small diameter section corresponding to the workpiece clamping section and a large diameter section corresponding to the liquid expansion control section, the liquid expansion communication hole communicates with the small diameter section, and the large diameter section is provided with There is a piston for controlling the hydraulic expansion pressure. The liquid-expanding mandrel of the invention can not only ensure the matching clearance between the workpiece and the mandrel, but also fix the position of the workpiece on the mandrel.

The invention discloses a full-automatic cover folding and carton sealing machine which comprises a rack assembly, a cover folding assembly and a carton sealing assembly. The folding assembly is installed on the front portion of the rack assembly and comprises a paging part, a front-back folding part and two-side folding parts, the paging part is installed on the front portion of the folding assembly, paging plates are arranged on the left side and the right side of the paging part, and the paging plates are suitable for limiting the angle between the carton left side wing and the carton right side wing; the front-back folding part is installed in the middle of the folding assembly and suitable for folding the front side wing and the rear side wing of the carton. The two-side folding part is installed on the rear portion of the folding assembly, two-side folding mechanisms are rotatably arranged on the left side and the right side of the two-side folding part, and the two-side folding mechanisms are suitable for turning over a carton left side wing and a carton right side wing; and the gluing assembly is mounted between the front and rear folding parts and the two side folding parts, and the gluing assembly is suitable for spraying hot melt glue on the front side wing and the rear side wing of the carton. The full-automatic cover folding and carton sealing machine is efficient and stable.

The invention relates to a thin-wall part precision turning machining method and a positioning clamp, in particular to a positioning clamp and a machining method of a gyroscope motor dynamic pressure air bearing rotor cover. The positioning clamp comprises a spherical surface positioning mandrel, a positioning lantern ring, an anti-vibration pad and a back supporting seat. The spherical positioning mandrel is a step shaft with center holes formed in the two end faces, and comprises a clamping section, a large thread section, a second guide cylindrical section, a spherical positioning section, a spherical table end face, a first guide cylindrical section and a small thread section from left to right in sequence. The machining method comprises the steps of first-step machining of the rotor cover, machining of a series of spherical positioning mandrels, machining of a positioning lantern ring and a back supporting seat, selection of a proper spherical positioning mandrel, turning of the rotor cover and the like. The problems that an existing machining method is poor in positioning precision and low in machining efficiency, and the concave spherical surface is crushed are solved, damage to the concave spherical surface is avoided by limiting six degrees of freedom, and the machining precision of the rotor cover is guaranteed.

The invention relates to a slide block guiding device for a powder hydraulic machine. The slide block guiding device comprises a guide rail which is vertically and fixedly arranged on the inner side face of a vertical post and a baffle block which is arranged on the side face of a slide block, wherein the guide rail and the baffle block are provided with a first wedge surface and a second wedge surface with consistent oblique angles respectively; and a guide plate which is fixedly arranged on the baffle block is arranged between the two wedge surfaces. The slide block guiding device is characterized by further comprising an adjusting block, wherein the adjusting block and the baffle block are provided with a third wedge surface and a fourth wedge surface with consistent oblique angles respectively; and the third wedge surface is tightly pressed on the fourth wedge surface through a jack screw and a pull screw which are connected to the side face of the slide block. Due to the adoption of the structure, compared with the baffle block guide rail structure in the prior art, the slide block guiding device has the characteristics of convenience for adjusting and saving in time because the guide rail is taken as a positioning benchmark and the fit clearance along the entire travel of the guide rail can be ensured by adjusting the clearance between the guide plate and the guide rail at a certain space position; and moreover, the adjusting block and the baffle block are contacted with each other through the wedge surfaces, so that parallel movement of the baffle block along the side face of the slide block is ensured during adjusting, and the consistence of the fit clearance between the guide plate and the guide rail is further ensured.

The invention belongs to the technical field of pump supplies, in particular to a guide shell structure for water pumps. The guide shell structure comprises a plurality of guide blades; the left and right of and the outside of the guide blades are fixed through a left cover and a right cover; the inner sides of the guide blades are fixed through inner braces so that the guide blades are evenly distributed between the left cover and the right cover; a left shell and a right shell are provided outside the left cover and the right cover; an impeller ring seat is fitted to the upper ends of the left and right covers; a moving impeller ring is arranged on the impeller ring seat; an impeller ring cover is disposed above the moving impeller ring and is fitted to the impeller ring seat; an inner sleeve seat is welded to the inner braces; guide blade sleeves are embedded in the inner sleeve seat. The guide shell structure has the advantages that a fit gap between the impeller ring and an impeller in the guide shell can be effectively guaranteed, coaxiality of the impeller is also ensured after a pump shaft is mounted, and operating efficiency of a pump can be relatively improved and ensured.

The invention discloses a matching structure of a door protection plate and an inner triangular block and an assembling process of the matching structure. The matching structure comprises a door metalplate, a door guard plate, an inner triangular block and a screw, wherein a threaded hole is formed in the door metal plate, a cylindrical hole is formed in the middle of the upper end of the door guard, the screw penetrates through the cylindrical hole and is screwed in the threaded hole so as to enable the door guard plate to be tightly matched with the door metal plate, a cross-shaped positioning hole is formed beside the cylindrical hole, a first clamping groove and a second clamping groove are formed in the two sides of the upper end of the door guard plate, a third clamping groove is formed in the side edge of the door guard plate, a cross-shaped positioning pin is arranged in the middle of the lower end of the inner triangular block, a first inserting buckle and a second insertingbuckle are arranged on the two sides of the cross-shaped positioning pin respectively, a third inserting buckle is arranged on the side edge of the lower end of the inner triangular block, the inner triangular block is connected with the door guard plate in a matched mode, the cross-shaped positioning pin is inserted into the cross-shaped positioning hole for positioning, the first inserting buckle is inserted into the first clamping groove for clamping, the second inserting buckle is inserted into the second clamping groove for clamping, the third inserting buckle is inserted into the third clamping groove for clamping, and the position degree of the door guard plate in the Y direction is ensured; and the position degree of the inner triangular block in the X direction or the Z directionis ensured.

The invention relates to a sealing structure between a stator and a rotor of an aero-engine. The sealing structure is fixed on a stator piece and comprises an annular mandrel, brushing wires, a hoop ring, an annular pressing plate and an annular supporting plate; the multiple strands of brushing wires are wounded around the annular mandrel, the tail ends of the brushing wires face the inner side of the annular mandrel, the hoop ring is bent into an arc shape to fix the brushing wires on the annular mandrel, and the annular supporting plate and the annular pressing plate are assembled togetherto form an annular cavity; and an annular groove opening is formed in the inner circumferential surface of the annular cavity, the annular mandrel, the brushing wires and the hoop ring are assembled in the annular cavity, and the brushing wires stretch out from the annular groove opening. According to the sealing structure between the stator and the rotor of the aero-engine, the air leakage rate between the rotor and the stator can be effectively reduced, performance of the engine original design state is kept, and safety and reliability of engine work are improved.

The invention discloses a block type energy-saving DC ceiling fan motor. A core is a split structure, the structure of a ceiling fan motor is made to be more reasonable through an improved matching structure, production is more convenient, and energy saving and environmental protection are achieved. The ceiling fan motor includes a housing assembled by an upper housing and a lower housing, whereina plastic ring is mounted inside the housing, an inner wall of the plastic ring is fixedly equipped with an iron ring, a magnet is fixed to an inner wall of the iron ring through a fixing ring, a core is fixedly mounted at the iron ring center, the core is respectively fixed with an upper winding frame and a lower winding frame up and down, the core is assembled from four one fourth arc-shaped core bodies, a shaft penetrating through the center of the housing is further included, the shaft penetrates through a rear bottom end of the upper housing and is rotatably mounted on a bearing, the bearing is fixedly mounted at the center of the lower housing, the position where the shaft penetrates through is further equipped with the bearing, a control board is driven in a multi-power mode, and the more convenient wider use environment is provided for a user.

The invention discloses a ground wire assembly comprising a main rod body and an auxiliary rod body which are arranged in parallel. The top end of the main rod body is provided with a fixing head restraint matched with a wiring terminal. The top end of the auxiliary rod body is provided with a movable head restraint clamped and matched with the fixing head restraint. A guiding aperture is arranged in the fixing head restraint along an axial direction of the main rod body. The tail end of the movable head restraint is movably inserted in the guiding aperture and is in hinged connection with the auxiliary rod body. The middle portion of the main rod body is provided with an adjusting gear in a rotatable mode. The axis of the adjusting gear is perpendicular to the axis of the main rod body. A matched surface between the tail end of the auxiliary rod body and the main rod body is provided with a tooth bar engaged with the adjusting gear in a matched mode. The connection structure of the ground wire assembly is safe and reliable, and the operation process is simple to perform.

The invention relates to a precision turning processing method and a positioning fixture for thin-walled parts, in particular to a positioning fixture and a processing method for a rotor cover of a dynamic pressure air bearing of a gyro motor. The positioning fixture includes a spherical positioning mandrel, a positioning collar, a vibration damping pad, and a back-facing support seat. The spherical positioning mandrel is a stepped shaft with top holes provided on both ends, and includes a clamping section, a large thread section, a second guide cylinder section, a spherical positioning section, a ball table end face, and a first guide cylinder arranged in sequence from left to right. segments and small thread segments. The processing method includes the steps of the first step processing of the rotor cover, processing a series of spherical positioning mandrels, processing the positioning collar and the back support seat, selecting a suitable spherical positioning mandrel, and turning the rotor cover. The invention solves the problems of poor positioning accuracy, low processing efficiency, and crushing of the concave spherical surface in the existing processing methods, avoids the damage of the concave spherical surface by limiting 6 degrees of freedom, and ensures the processing accuracy of the rotor cover.

The invention discloses a detachable goods shelf cross beam. According to the technical scheme, the detachable goods shelf cross beam is characterized by comprising a cross beam pipe, the two ends ofthe cross beam pipe are detachably connected with buckle plates, the buckle plates are provided with inserting parts inserted into an inner cavity of the cross beam pipe, the inserting parts are matched with the inner wall of the cross beam pipe, and fixing structures are arranged between the inserting parts and the cross beam pipe. According to the detachable goods shelf cross beam, the weighingstrength of the goods shelf cross beam is ensured while the cross beam pipe and the buckle plates are convenient to disassemble and assemble, and the carrying size of the goods shelf cross beam is reduced.

The invention provides an eccentric sleeve mechanism with a support bearing. The mechanism comprises an outer sleeve, an eccentric inner sleeve, an upper roller bearing, a lower roller bearing and a large bevel gear; the outer sleeve is fixedly mounted at the bottom of a cone machine frame; the eccentric inner sleeve is movably mounted in the outer sleeve through the upper roller bearing and the lower roller bearing; and the large bevel gear for driving the eccentric sleeve mechanism is mounted at the bottom of the eccentric inner sleeve. The mechanism is characterized by further comprising anupper end cover, a plane bearing, a bottom end cover and adjusting gaskets; the bottom end cover is fixedly mounted at the bottom of the outer sleeve; the plane bearing for supporting the eccentric inner sleeve is mounted on the upper end surface of the bottom end cover; and multiple adjusting gaskets for adjusting a gear matching gap are mounted in the connected place of the outer sleeve with the cone machine frame. The mechanism can guarantee the stability of the eccentric sleeve in the rotary moving process, so that the stability of the gear gap between the large bevel gear and the drivingbevel gear is improved, and the stop time in the production process and the maintenance cost are reduced.

The invention provides a motor stator, a motor and a compressor, the motor stator comprises a plurality of punching sheets which are overlapped and buckled, the edge of each punching sheet is provided with n grooves at intervals, and the opening of each groove faces the outer side of the motor stator, so that a non-contact gap is formed between the motor stator and a motor shell; and a buckling point is correspondingly arranged on the inner side of each groove. The U-shaped groove is formed in the outer circle of the iron core of the motor stator, so that a non-contact gap is formed between the iron core and the motor shell, that is, the motor shell is not in hard contact with the buckling point on the punching sheet through a tangible structure, and therefore extrusion stress generated when the motor stator and the motor shell are assembled through a hot jacket cannot be transmitted to the buckling point, and the reliability of the motor stator is improved. Therefore, the buckling points are not loosened or deformed, the stability of the overall structure of the stator is ensured, and the fit clearance between the inner circle of the stator core and the rotor is kept.

The invention discloses an automatic control surface changing speed reducing mechanism with feedback for a pneumatic test. Two cover plates in the mechanism respectively form a mounting cavity which is through up and down on the front and rear surfaces of the left and right supports; a shifting fork is mounted in the cavity through a rotating shaft; the upper end of the shifting fork is matched with a nut on a screw rod; the tail end of the shifting fork is matched with a ball socket of a spherical push rod through a ball head, the lower end of the spherical push rod is connected with a control surface mounting base through a movable shaft, the control surface mounting base is movably connected to the lower ends of the left support and the right support through a fixed shaft, and the center of the ball head is located between the center of the movable shaft and the center of the fixed shaft. A motor drives the screw rod to rotate forwardly and reversely, the nut linearly moves along the screw rod and drives the shifting fork to rotate forwardly and reversely around the rotating shaft, the lower end of the shifting fork drives the spherical push rod to push and pull the control surface mounting base, and the control surface mounting base angularly deflects around the fixed shaft. According to the invention, the conversion from high rotating speed and low torque to low rotating speed and high torque of the motor in a variable-control-surface steering engine can be realized in a limited space.