21results about How to "Reduced concentricity requirements" patented technology

The utility model discloses an electric steamer with an outer water tank, which comprises a base, a steamer assembly arranged on the base and the outer water tank, a steam generating cavity is arranged in the base, a water outlet is arranged on the wall of the outer water tank, a water inlet is arranged on the wall of the steam generating cavity, a connecting pipe is arranged between the water outlet and the water inlet, and the outer water tank is arranged on the outer water tank. The connecting pipe is a flexible sealing pipe, one end of the flexible sealing pipe is connected with the wall of the outer water tank in a sealed mode, and the other end of the flexible sealing pipe is connected with the wall of the steam generating cavity in a sealed mode. According to the electric steamer, the flexible sealing pipe is connected between the outer water tank and the wall portion of the steam generating cavity in a sealed mode, sealing reliability can be guaranteed, a sealing ring is omitted, meanwhile, the machining difficulty of the outer water tank is lowered, the requirement for the coaxiality of the connecting pipe, the water outlet and the water inlet is lowered, the error-tolerant rate deviation is high, and the service life of the electric steamer is prolonged. And the connecting pipe is easy to disassemble and assemble.

The invention relates to a range extender unit and a range extender module for a vehicle. The range extender unit includes: a motor; a torsional vibration damper (10) which is coaxially arranged on the radial inner side of the electric machine, one end (12) of the torsional vibration damper (10) being connected to a rotor (9) of the electric machine in a rotationally fixed manner; a housing (1) surrounding the electric machine and the torsion damper (10); and a transmission shaft (15) which is arranged coaxially on the radial inner side of the torsion damper (10), the transmission shaft (15) being connected in a rotationally fixed manner to the other end (11) of the torsion damper (10), and an axial end of the transmission shaft (15) extending out of the housing (1), said axial end being formed with a face spline (17). The range extender module comprises a controller and the range extender unit.

The present invention relates to the technical field of three-dimensional parking garages, and specifically to a wire rope traction three-dimensional parking garage lifting system; it solves the technical problems that the chain and sprocket are easily separated during high-speed transmission in the existing super-high-rise three-dimensional parking garage lifting system, and the noise is large during high-speed operation, and the transmission stability is poor. The technical solution of the present invention is: a wire rope traction three-dimensional parking garage lifting system, including a frame, a power transmission system, and two combined wheel trains; the power transmission system includes a reduction motor and a main shaft connected at both ends thereof; the combined wheel train includes a traction wheel, a first support pulley, a second support pulley, a third support pulley, a guide wheel train, a first wire rope, and a second wire rope; one end of the first wire rope is connected to the elevator, and the other end is connected to the counterweight mechanism after passing through the second support pulley, the traction wheel, the first support pulley, and the first guide wheel train; the second wire rope is connected in the same way as the first wire rope.

The invention relates to the technical field of motors, in particular to a permanent magnet synchronous motor, and aims to solve the technical problems that the assembly difficulty is increased, the assembly efficiency is reduced and the assembly quality of a motor is unstable due to the fact that a bearing outer ring of a self-aligning bearing is difficult to centralize in the prior art. The permanent magnet synchronous motor comprises a rotor assembly and a stator assembly. The rotor assembly comprises a motor shaft and an elastic centering bearing arranged on the motor shaft in a sleeving mode. The elastic centering bearing comprises a bearing body and an annular elastic piece arranged on the bearing body in a sleeving mode. According to the permanent magnet synchronous motor, an elastic piece expansion automatic righting mode is adopted, the requirement of motor assembly for the coaxiality of the stator assembly and the rotor assembly is lowered, the motor assembly quality stability is improved, the assembly difficulty is lowered, and the assembly efficiency is improved. The technical problems that the assembling difficulty is increased, the assembling efficiency is reduced and the assembling quality of the motor is unstable due to the fact that the bearing outer ring of the self-aligning bearing is difficult to centralize in an existing permanent magnet synchronous motor are solved.

The invention belongs to the technical field of aviation airborne electric compressors, and relates to a radial air foil bearing mounting structure for an airborne electric compressor. Comprising a motor shell, a damping rubber ring, a bearing sleeve, a steel sleeve, a sealing ring, a metal gasket, an anti-loosening gasket, an elastic clamping ring, a stop pin, an air entraining nozzle, a shaft, a motor stator, a motor rotor, an impeller, an interference pin, a fastening screw and an anti-loosening gasket. A notch in the steel sleeve is of an inverted horn-shaped structure with the small outside and the large inside, it is guaranteed that the lap joint foil can freely move and rotate and adapt to rotor deflection during work, meanwhile, a sealing ring between the steel sleeve and the bearing sleeve can be used for vibration reduction in the airborne environment, misalignment installation errors of front and rear radial bearings and the rotor are reduced, and the requirement for the coaxiality of all assemblies is lowered; the sealing ring is used for sealing the radial air bearing, and the actual gap between the sealing ring and the rotor can be flexibly selected according to the cooling flow and the internal pressure maintaining requirement of the bearing.

The present invention discloses a solenoid valve capable of improving control accuracy, which relates to the field of solenoid valves and aims to solve the problem that the existing solenoid valve adds a magnetic isolation gasket between the armature and the magnetic pole to control the stroke, which affects the control accuracy of the solenoid valve. The key points of its technical solution include a magnetic sleeve, an armature is slidably arranged inside the magnetic sleeve, and a magnetic pole is arranged at its end, the magnetic pole includes a closing part and a plug-in part, the closing part contacts the end of the magnetic sleeve, the plug-in part is embedded in the magnetic sleeve, a large spring in a compressed state is arranged between the plug-in part and the armature, and a clearance groove cooperating with the large spring is respectively provided on the plug-in part and the armature; the end face of the plug-in part opposite to the armature is provided with a plurality of protrusions that can contact the end face of the armature. The present invention can reduce the number of parts, reduce assembly costs, assembly errors and processing difficulties, and thus improve the control accuracy of the solenoid valve.

This invention relates to an electronic expansion valve, comprising a drive assembly, a screw, a valve needle, a valve seat, a bearing, and a valve needle spring. The valve seat has a fluid passage. The drive assembly drives the screw to rotate and move axially. The valve needle has an axial mounting hole inside, and its upper part has a bearing cavity to accommodate the bearing. The lower end of the screw extends into the axial mounting hole and is rotatably connected to the bearing, allowing for axial sliding. A screw retaining ring is provided at its lower end, and a screw annular protrusion is provided on its outer periphery. The valve needle spring is sleeved on the screw and confined between the screw annular protrusion and the upper end face of the valve needle. Downward movement of the screw compresses the valve needle spring through the screw annular protrusion, pushing the valve needle downward. Upward movement of the screw pushes the valve needle upward through the screw retaining ring against the bearing, thereby achieving stable axial movement of the valve needle to precisely control the opening and closing of the fluid passage. This structure achieves pure axial transmission through the bearing, effectively preventing the valve needle from rotating and vibrating with the screw. The compact layout of the valve needle spring significantly shortens the axial dimension of the valve body, improving transmission reliability and service life.

The present invention discloses a coupling and a power transmission device, which relate to the field of mechanical transmission and are used to optimize the structure and performance of the coupling. The coupling includes a first sleeve, a second sleeve and a rope. The first sleeve has a first mounting hole and a plurality of recessed parts, the central axis of the first mounting hole is along the central axis of the first sleeve, and the plurality of recessed parts surround the first mounting hole. The second sleeve is installed in the first mounting hole, and a groove is provided at the first end of the second sleeve. The two ends of the rope are located in the recessed part, and the middle of the rope is stuck in the groove to transmit torque between the first sleeve and the second sleeve. In the coupling provided by the above technical solution, there is no radial limiting structure between the first sleeve and the second sleeve, which greatly reduces the requirements for the coaxiality of the first connecting shaft and the second connecting shaft, so that the first connecting shaft and the second connecting shaft can still effectively transmit torque even if there is a large coaxiality deviation.

The utility model discloses a plunger press-fitting device with a floating positioning sleeve, which comprises a pressure head fixedly arranged on a sliding rod of a press machine, and is characterized in that the floating positioning sleeve sliding up and down along the pressure head is sleeved on the outer side of the pressure head, a sliding limiting groove is arranged on the pressure head along the axial direction, and a limiting screw is arranged corresponding to the sliding limiting groove; annular grooves are formed in the positions, close to the upper end and the lower end of the floating positioning sleeve, of the floating positioning sleeve, elastic rings are sleeved with the annular grooves, at least three holes communicated with an inner cavity of the floating positioning sleeve are evenly distributed in the groove bottom of each annular groove in the circumferential direction, steel balls abutting against the outer wall of the pressing head are installed in the holes, and pressing blocks are installed in the holes in the outer sides of the steel balls. The outer side of the pressing block abuts against the inner wall of the elastic ring. A reset spring is arranged at the upper end of the floating positioning sleeve. Press fitting work of the plunger can be efficiently and accurately completed, and meanwhile the problems of scratching and damage possibly occurring in a traditional method are solved.

The utility model relates to a kind of double-motor driving device for golf bag car.The double-motor driving device for golf bag car includes drive motor, reduction assembly and shell, the shell includes the main part fixed with drive motor and the extension part located at the both sides of main part, the reduction assembly includes worm gear structure and worm structure in main part, the worm structure is located at drive motor output end, the both ends of worm gear structure are provided with first shaft part and second shaft part respectively, the first shaft part and second shaft part are rotatably fixed with shell by first bearing, the extension part in both sides is rotatably fixed with a linkage shaft by two second bearings respectively, the end of first shaft part extends into extension part and is linked with the inner end of output end by coupling, one second bearing is located at the outer end of extension part, and the other second bearing is adjacent to the coupling.The utility model has the advantages of lower production requirements, easy assembly and higher stability during use.

The utility model discloses an auxiliary rotating device, which comprises a gear motor and a torque sensor, the gear motor is connected with one end of the torque sensor, the other end of the torque sensor is connected with a cross slider through a cross slider shaft, the cross slider is connected with a chuck support, a chuck is arranged on the chuck support, and the chuck is connected with the cross slider through a cross slider shaft. The chuck is connected with a rotating disc through a bearing, and when the gear motor works, the rotating disc can be driven to rotate through the torque sensor, the crosshead shoe shaft, the crosshead shoe, the chuck support and the chuck. The auxiliary rotating device provided by the utility model can provide rotating power for the collecting ring to simulate a field rotating environment, can provide rotating power with larger torque, and is provided with the torque sensor, so that torque transmission fluctuation can be detected in real time.

This invention provides a heavy-duty braking device and a heavy-duty climbing machine, relating to the field of heavy-duty braking technology. The heavy-duty braking device includes a column brake plate arranged along the axial direction of a column, an electromagnetic brake that can be locked onto the column brake plate, and a horizontal connecting seat, a horizontal pin, a rotary connecting seat, a rotary pin, and a load connecting seat connected in sequence to the electromagnetic brake. The load connecting seat is connected to the load. This invention allows the load to rotate around the rotary pin with the load connecting seat, and also to move relative to the horizontal connecting seat along the length of the horizontal pin, along with the load connecting seat, the rotary pin, and the rotary connecting seat. This changes the center of gravity of the load, which can change with the straightness and concentricity deviation of the column brake plate to adapt to changes in the straightness and concentricity of the column. During braking, the load remains symmetrical with respect to the column, reducing the impact of the load on the column. It also has lower requirements for the straightness and concentricity of the column, reducing the manufacturing cost of the column.

This application relates to the field of mechanical testing tooling technology, and in particular to a locking force testing tooling and measurement method, comprising a support body with an annular groove coaxially formed thereon; a rear support, with a first ball bearing sleeve disposed between the rear support and the support body, the first ball bearing sleeve being rolledly connected to the inner circumference of the rear support; a second ball bearing sleeve, coaxially sleeved and connected to the outer circumference of the rear support; a front support, connected to the rear support at the end away from the annular groove, and a third ball bearing sleeve coaxially sleeved and connected to the outer circumference of the front support; a tension / compression sensor, located in the inner cavity of the rear support, with one end connected to the support body and the other end connected to a force application unit; and a recording and display unit. This application has the advantages of reducing friction during the locking force measurement process, ensuring the coaxiality of the tooling and the object to be measured, improving the accuracy of the measurement data, reducing the weight of the testing tooling, and facilitating installation, handling, and carrying.

The utility model provides a split type oil duct connector which can solve the problems that when an existing connecting pipe is used for connecting two oil ducts in a sealed mode, the requirement for the coaxiality of two oil duct openings is high, and abrasion and local oil leakage occur after long-term operation. The connector comprises an oil guide core, an oil guide device, an elastic part support and an elastic part, one end of the oil guide core is provided with an arc-shaped mounting groove, a first oil passing hole is formed in the oil guide core, the side wall of the oil guide core is provided with an annular boss, one end of the boss is provided with a convex ring, and the end face of one end of the oil guide device is arc-shaped and used for being matched with the mounting groove in a concave-convex mode so that the oil guide device can rotate relative to the oil guide core. A second oil passing hole is formed in the oil guide device, the oil guide core is sleeved with the elastic piece support, the section of one axial side of the elastic piece support is in an L shape, the annular face with the smallest inner diameter is in clearance fit with the outer surface of the oil guide core, and the outer surface of the elastic piece support is in clearance fit with the inner wall of the convex ring. And an annular mounting cavity for sleeving the elastic piece is formed among the inner wall of the elastic piece support, the outer wall of the oil guide core, the end face of one end of the boss and the inner wall of the convex ring.

The flexible transmission mechanism belongs to the field of transmission mechanisms, and includes: an input connector for connecting a driving device; an output connector for connecting a load device; a plurality of retaining frames arranged at a certain interval between the input connector and the output connector; a plurality of core ropes, the two ends of which are respectively connected to the input connector and the output connector, and the main body of each core rope is connected in series with a plurality of retaining frames; a plurality of elastic members, and the input connector and the adjacent retaining frame, the output connector and the adjacent retaining frame, and the adjacent retaining frames are all connected by at least one elastic member. The flexible transmission mechanism realizes flexible transmission from the input connector to the output connector, reduces the coaxiality requirements and processing accuracy requirements for the input connector and the output connector, and can realize long-distance transmission by increasing the number of retaining frames. The overall structure is simple and compact, and a larger load range can be achieved.

The invention belongs to the technical field of hydraulic pressure, and discloses a balance valve element, a balance valve and a fluid control assembly. The balance valve element comprises a valve element body and a one-way valve assembly, an oil inlet flow channel is formed in the valve element body, the one-way valve assembly comprises a limiting part and a one-way valve element, the limiting part is arranged at the oil inlet end of the oil inlet flow channel, the one-way valve element is arranged in the oil inlet flow channel in a sliding mode and elastically connected with the valve element body, and the one-way valve element can be selectively separated from or abut against the limiting part. The one-way valve assembly is integrated in the valve element body, the axial size of the balance valve element is reduced, the whole balance valve element structure is more compact, the requirement for the coaxiality of the valve element body and the one-way valve assembly in the machining process is lowered, and the machining efficiency is improved.

The utility model discloses a card feeding structure of an immunoassay analyzer, which belongs to the technical field of immunoassay and detection and comprises a support plate, a slide rail and a power device are arranged on the support plate, a card seat is slidably arranged on the slide rail, the power device comprises a servo motor, a screw rod is connected onto the servo motor and is parallel to the slide rail, and the slide rail is connected with the card seat. The lead screw is sleeved with a movable lead screw sleeve, the lead screw sleeve is fixedly connected with the clamping base, the lead screw sleeve is connected with a buffering chuck, a protruding clamping column is arranged in the center of the buffering chuck, a lead screw hole is formed in the lead screw sleeve, a clamping column groove is formed in the lead screw hole, the clamping column is arranged in the clamping column groove in a sleeved mode, and the clamping column groove is elastically connected with the clamping column through a rubber pad. In the moving process of the card feeding structure, even if eccentric rotation exists in the lead screw, the eccentric rotation is buffered through the rubber pad, the lead screw sleeve is prevented from directly acting on the card seat, the movement of the card seat is only subjected to pushing force instead of the eccentric force of the lead screw, and the card seat is prevented from being blocked in the moving process.

The present invention discloses a liquid nitrogen biological container with a multi-degree-of-freedom centering shaft structure, which belongs to the technical field of biological containers, and includes an inner container, wherein the inner container is provided with an outer shell, a tray is provided inside the inner container, the tray is fixedly connected with a shaft, an inner centering structure connected to the inner top wall of the inner container is provided on the shaft, a tray sleeve is provided outside the shaft, the tray sleeve is fixedly connected with the tray, and a bottom centering structure connected to the inner bottom wall of the inner container is provided on the tray sleeve, and an outer centering structure connected to the outer shell is provided on the shaft outside the outer shell. By providing the inner centering structure, the bottom centering structure and the outer centering structure, the coaxiality requirements in the welding and manufacturing process of the product can be greatly reduced, and the coaxiality requirements can be achieved by adjusting the position of the shaft.

The utility model discloses a fast adjustable mechanism for a bottom plate assembly of an FSEC racing car, which comprises the following components: the bottom plate assembly which comprises a bottom plate and a pedal mechanism which is mounted at the top of the bottom plate; the gas spring comprises a pressure rod and a pressure cylinder; the pressure rod can axially move relative to the pressure cylinder; wherein the gas spring is arranged along the longitudinal direction of the vehicle body; the free end of the pressure cylinder is fixedly connected to the bottom of the bottom plate, and the free end of the pressure rod is hinged to a frame. The two unthreaded shafts are arranged in the longitudinal direction of the vehicle body, and the two unthreaded shafts are located below the bottom plate and arranged on the two sides of the gas spring correspondingly; wherein the two ends of the optical shaft are fixedly connected to the frame respectively; and the two groups of linear sliding blocks are fixedly mounted at the bottom of the bottom plate and are mounted on the two optical shafts in a one-to-one correspondence and matching manner.

The invention provides a lateral suction locking mechanism with torque, which comprises a rack, a tightening gun, a sleeve assembly and a telescopic control assembly, a positioning shaft sleeve is arranged on the rack, one end of the sleeve assembly is connected to the output end of the tightening gun, the other end of the sleeve assembly penetrates through the positioning shaft sleeve and is used for holding a screw, and the tightening gun is used for controlling the sleeve assembly to rotate; therefore, the screw is assembled on the workpiece. Wherein the sleeve assembly is provided with a telescopic part, the telescopic control assembly is connected with the telescopic part and used for controlling the telescopic part to stretch out and draw back relative to the positioning shaft sleeve, the telescopic control assembly is provided with an elastic unit, and when the telescopic control assembly controls the telescopic part to contract, the elastic unit can be synchronously extruded and contracted; and the elastic unit can provide torque for the telescopic part, so that the sleeve assembly can press the screw on the workpiece, the screw can be conveniently locked, and the assembly precision is higher.

The utility model discloses a multichannel flexible piston sleeve pipette which comprises a shell, a driving mechanism, a plurality of pistons, a sleeve assembly and a coaxiality self-adaptive fine adjustment mechanism, the sleeve assembly is fixed to the shell and comprises a plurality of channels. The first end of the piston is in transmission connection with the driving mechanism through the coaxiality self-adaptive fine adjustment mechanism; the second ends of the pistons are inserted into the sleeve assembly from the first ends of the channels in a one-to-one correspondence mode. According to the multi-channel flexible piston sleeve pipette disclosed by the utility model, the installation difficulty of the piston can be greatly reduced, the connection precision requirement between the piston and the driving mechanism is reduced, and the coaxiality of the piston and the sleeve assembly can be ensured.