16results about How to "Convenient preload" patented technology

The utility model provides a presser foot structure of a multi-needle machine, and belongs to the technical field of sewing machines. The problem of how to improve the sewing quality of the multi-needle machine is solved. The presser foot structure of the multi-needle machine comprises a connecting base, a presser foot plate with a plurality of needle holes and a presser foot support fixedly connected with the connecting base, the presser foot plate is located below the presser foot support, the two side edges of the presser foot plate are hinged to the presser foot support, and a torsional spring is arranged between the presser foot plate and the presser foot support. The bottom face of the presser foot plate inclines relative to the horizontal plane in the front-back direction and is high in front and low in back, and the presser foot plate can swing relative to the presser foot support and reset through elastic force of the torsion spring. The presser foot is simple, reasonable and stable in structure, the presser foot plate has mechanical elasticity, stable and reliable pressing force can be provided for cloth with different thicknesses, the cloth is not prone to loosening, the pressing effect is good, and the sewing quality of the multi-needle machine is greatly improved.

The present invention discloses a polytetrafluoroethylene two-color spiral heat shrinkable tube and a preparation method thereof; the method mainly comprises: (1) mixing two-color materials A and B; (2) preforming two-color blanks; (3) extruding paste; (4) drying, sintering, cooling; (5) heat treatment; (6) inflation. The two-color blanks adopt a detachable barrel, and after compaction, a uniform two-color blank dividing line parallel to the axis is obtained. The overall process is simple and efficient, and the prepared two-color spiral heat shrinkable tube has good dimensional stability, relatively uniform pitch, strong and lasting tinting power, and can be used with an endoscope or other equipment to effectively improve the navigation and positioning of medical staff in endoscopic medical treatment and reduce the pain of patients.

The invention belongs to the field of vibration sensors, and provides a high-sensitivity piezoelectric vibration sensor, which comprises a shell, one end of the shell is provided with a fixing structure, the other end of the shell is provided with a mounting cavity, the interior of the mounting cavity is rotatably connected with a positioning column, the outer side of the positioning column is sleeved with an annular piezoelectric ceramic piece, and the annular piezoelectric ceramic piece is connected with the mounting cavity. One end of the positioning column is fixedly connected with a pre-tightening screw rod, and the pre-tightening screw rod is sleeved with a universal mass block assembly. When the pretightening force of the universal mass block assembly on the annular piezoelectric ceramic piece is adjusted, the push pipe is pushed to enable the extrusion pipe to leave the side face of the elastic ring piece and the middle of the elastic ring piece to bulge, so that the limitation of the outer teeth on the adjusting head is relieved, the adjusting head can be rotated at the moment, the adjusting head drives the pretightening screw to rotate, and the pretightening force of the annular piezoelectric ceramic piece is adjusted. The pre-tightening force of the pre-tightening nut can be adjusted by hands without using tools, and the device is more convenient to adjust the pre-tightening force and simpler to operate.

The invention discloses a piezoelectric ceramic tubular motor, and relates to the technical field of piezoelectric ceramic motors, the piezoelectric ceramic tubular motor comprises a piezoelectric ceramic tube body, a first hollow stator and a second hollow stator, the lower part of the piezoelectric ceramic tube body is fixedly connected with the first hollow stator in a gluing manner, and the middle part of the first hollow stator is provided with a first through hole; and the upper portion of the piezoelectric ceramic tube body is fixedly connected with a second hollow stator in a gluing mode, a second through hole is formed in the middle of the second hollow stator, the lower portion of the first hollow stator is integrally connected with the bottom end of a rotor, and the outer end of a screw rod is in threaded connection with a rectangular block. According to the piezoelectric ceramic tubular motor, the first hollow stator is integrally connected with the bottom end of the rotor, the rotating rod is only attached to the second through hole when rotating and does not make contact with the piezoelectric ceramic tube body and the first hollow stator, friction between the stator and the rotor is reduced, and the pre-tightening force between the stator and the rotor can be adjusted by selecting the slots of different heights.

The invention discloses a structural design and optimization method for an X-ray tube anode target disc fastening nut, and the method comprises the steps: obtaining the fastening design requirements of an X-ray tube anode target disc, and constructing a parameterized model of the anode target disc and the fastening nut; constructing a simulation analysis model according to the parameterized model of the anode target disc and the fastening nut and the design allowable pre-tightening force of the bolt; determining a simulation analysis result according to the simulation analysis model, wherein the simulation analysis result comprises the simulation pressure intensity of the pressing contact surface of the fastening nut and the simulation structure stress of the fastening nut; if the simulation analysis result does not meet the fastening design requirement, simulation variables, including the simulation inner diameter and the simulation outer diameter of the fastening nut, of the fastening nut are set according to the parameterized model, simulation variable value searching is conducted in simulation intervals of the simulation inner diameter and the simulation outer diameter, and value searching results are obtained; and the optimized size, the optimized pre-tightening force and the optimized pressing force of the fastening nut are determined according to the value searching result.

The present invention discloses a Ferris wheel drive pre-tightening rapid control device and method thereof, which relates to the first field of Ferris wheel drive control, and comprises a mounting frame, the top of the mounting frame is provided with a sleeve rod, the outer side of the sleeve rod is sleeved with a wheel frame, one end of the wheel frame is provided with a track, one side of the wheel frame is provided with an upper box body above the track, and one side of the wheel frame is provided with a lower box body below the track. The present invention provides a pull plate, a round tube, and a sleeve, and when multiple groups of wheel discs of the Ferris wheel need to be urgently pre-tightened, the pull plate is pulled by the round tube, and the bottom end of the pull plate rotates around the second pin shaft, so that the pull plate drives the first pin shaft to rotate around the second pin shaft, and the second pin shaft drives the outer fixed mounting sleeve plate to move, thereby driving the balance cylinder below the mounting sleeve plate to move up and down, thereby changing the pressure inside the balance cylinder, thereby changing the tension in the balance spring, and thereby changing the pressure between the wheel disc and the track.

The utility model provides a high crustal stress soft rock large deformation tunnel pre-stressed anchor rod structure which comprises a pre-stressed anchor rod, a grouting pipe is fixed on one side of the pre-stressed anchor rod, a slurry return pipe is fixed on the other side of the pre-stressed anchor rod, and the pre-stressed anchor rod comprises a first anchoring section and a second anchoring section. A grout stopping ring is arranged at the joint of the first anchoring section and the second anchoring section, a lathing thread is arranged at the end, away from the grout stopping ring, of the second anchoring section, and by arranging the first anchoring section, the grout stopping ring and the lathing thread, pre-tightening force can be conveniently applied to the pre-stressed anchor rod after installation, so that the friction effect between different rock stratums can be increased, surrounding rock within the anchoring range is clamped, and the anchoring effect is improved. A bearing structure is formed, and the stability of tunnel surrounding rock is improved; the single pre-stressed anchor rods are reasonably distributed in the surrounding rock, stressed areas are overlapped and interact with one another, the surrounding rock within a certain range is reinforced, and deformation and development of plastic zones are effectively reduced; and grouting and secondary grouting can be carried out, so that the pre-stressed anchor rod is more stable, and the anchoring survival rate is improved.

The utility model relates to the technical field of glass production, and provides a temporary transfer gripping device for conference screen panel glass production, which comprises a gripping assembly and an electric push rod, the gripping assembly comprises a base, a support seat, a top seat, a cylinder and a delivery pipe, the support seat is fixed at the top end of the base, the top seat is fixed at the top end of the support seat, and the electric push rod is fixed at the top end of the cylinder. An air cylinder is installed on one side of the top end of the top base. According to the device, the grabbing structure is arranged, one end of the connecting pipe and one end of the conveying pipe are mutually fixed through the flange plate, the suction cup and the flow dividing base are in threaded connection, and the suction cup is rotated, so that the suction cup and the flow dividing base are mutually separated, and the suction cup is convenient to replace; according to the temporary transferring and grabbing device for conference screen panel glass production, when a suction cup and a flow dividing base are fixed to each other, air leakage is prevented under the action of a sealing ring, the function that the suction cup of the temporary transferring and grabbing device is convenient to replace is achieved, and therefore the applicability of the temporary transferring and grabbing device for conference screen panel glass production in use is improved.

This invention relates to the field of controllers, specifically an electronic controller, comprising a housing, within which an energy storage element is disposed; the energy storage element is connected to the housing via a mounting unit; the mounting unit includes an anti-detachment unit and / or a limiting unit; the anti-detachment unit prevents the energy storage element from detaching from the housing; the limiting unit prevents the energy storage element from moving within the housing; this invention, through the installation unit, improves the stability and accuracy of the energy storage element's installation within the housing, while also facilitating the installation of the energy storage element; through the combined use of the anti-detachment unit and the limiting unit, the opposing blocking mechanism in the anti-detachment unit applies a backward pressing force to the columnar energy storage element; thereby achieving the fixed stability of the columnar energy storage element; the limiting unit provides axial limiting for the columnar energy storage element, preventing its movement within the housing.

The invention provides a method for extruding a tube blank when preparing a polytetrafluoroethylene two-color spiral tube. The method comprises the following steps: two semi-circular ring column cylinder bodies with semi-circular ring column tube blanks of different colors arranged therein are detachably enclosed to form a cylinder, the cylinder is detachably connected to a frame of an extrusion device, and a piston rod is driven to move in the cylinder by an extrusion oil cylinder so as to extrude a two-color circular ring column tube blank composed of two semi-circular ring column tube blanks of different colors out of the cylinder, and the operation is efficient and quick. Specific steps: put the semi-circular column tube blank A into the semi-circular column cylinder body A, put the semi-circular column tube blank B into the semi-circular column cylinder body B, the cylinder body A and the cylinder body B are connected and surrounded to form a circular column cylinder, the semi-circular column tube blank A and the semi-circular column tube blank B form a circular column tube blank, and the core rod in the extrusion device passes through the center of the circular column tube blank; the cylinder body A and the cylinder body B are detachably connected together; the cylinder is detachably connected to the frame; a piston matching the cylinder is slidably set on the core rod; the piston moves along the core rod in the cylinder to extrude the tube blank from the cylinder.

The invention provides a pipe hoop stepping conveying mechanism and an operation method thereof.The pipe hoop stepping conveying mechanism comprises a fixing plate, a moving assembly, a driving gear set, a driven gear set, a one-way bearing, a chain wheel assembly and a carrier, the moving assembly is arranged on the fixing plate, and the moving assembly is meshed with the driving gear set to drive the driving gear set to rotate; a driven gear set in meshing transmission with the driving gear set is arranged on one side of the driving gear set, a one-way bearing is installed on the driven gear set, a chain wheel assembly is installed on the driven gear set, and a carrier is installed on the chain wheel assembly. The movement assembly is arranged to drive the gear set to rotate so as to drive the chain wheel assembly to drive the carrier to move so as to transport the pipe hoop, and the one-way bearing is arranged to keep intermittent stepping transmission of the chain wheel assembly and the carrier, so that the transported pipe hoop is conveniently pre-tightened, and the retention time is provided for pre-tightening of the pipe hoop; the whole structure is compact, operation is stable, the carrier can circularly run in a reciprocating mode, the stepping range adjusting range is large, and adjustment is more convenient.

The utility model relates to the technical field of plate-and-frame filter presses, and provides a quick plate-and-frame filter press for production of gall-and-bat, which comprises a fixed frame and a hydraulic cylinder, the hydraulic cylinder is arranged on one side in the fixed frame, supports are uniformly fixed on two sides of the bottom end of the fixed frame, a push plate is fixed on one side of the hydraulic cylinder, and a baffle is fixed on the other side of the hydraulic cylinder. And pre-pressing structures are uniformly arranged on one side of the push plate. Through the arrangement of the sweeping structure, when slag cakes fall into the storage box, an electric push rod is started, the electric push rod can drive a moving plate to move, the slag cakes in the storage box are discharged, meanwhile, the moving plate can drive a sliding block to slide in a sliding groove, and under the action of the sliding block, the stability of the moving plate during moving is improved; the movable plate can also drive the bristles to move to sweep the bottom end of the interior of the storage box, so that the function that the device is convenient to sweep is realized, and the applicability of the rapid plate-and-frame filter press for the production of the Danba in use is improved.

The present invention relates to a crystal grinding machine, including a frame, a workbench arranged on the frame, a slide plate arranged on the workbench, a first driving mechanism for driving the slide plate to slide on the workbench, a fixture for clamping a workpiece to be processed, a plurality of grinding discs arranged corresponding to the fixture, and a second driving mechanism for driving the grinding disc to rotate. The fixture is detachably mounted on the slide plate, the grinding disc is rotatably mounted on the workbench, the fixture has a plurality of stations, each station is provided with a mounting mechanism for clamping the workpiece to be processed, and each mounting mechanism is arranged corresponding to a grinding disc. After adopting the technical solution of the present invention, the workpiece on the fixture is driven to move by the slide plate, and the workpiece is polished by the rotation of the grinding disc. In the present invention, the fixture is detachably mounted on the slide plate, the fixture has a plurality of mounting stations, and a plurality of workpieces can be clamped at one time, thereby improving the processing efficiency of the workpiece. In addition, the present invention has the advantage of convenient disassembly and assembly of the workpiece by designing a fixture with a specific structure, which can improve the processing efficiency of the workpiece and improve the polishing effect.

The utility model discloses a glass lifter transmission mechanism which comprises a base, a line wheel cover and a driving motor, a line wheel groove and a wiring groove are formed in the base, a driving wheel is rotationally arranged in the line wheel groove, the line wheel cover covers the line wheel groove, a first screw connector is arranged on the side, close to an output shaft of the driving motor, of the line wheel cover, and a second screw connector is arranged on the side, close to the output shaft of the driving motor, of the line wheel cover. One side of the wire wheel groove is provided with a first screw interface, the other side of the wire wheel groove is provided with a second screw interface, and a distance difference exists between the distance from the first screw interface to the center of the wire wheel groove and the distance from the second screw interface to the center of the wire wheel groove; the first connecting port and the second connecting port are symmetrically arranged relative to the central axis, the third connecting port and the fourth connecting port are symmetrically arranged relative to the central axis, the first connecting port is arranged corresponding to the position of the first screw interface, and the third connecting port is arranged corresponding to the position of the second screw interface. The base structure is simple in structure, left-right universality of the base structure can be achieved, production and machining cost is reduced, and economic benefits are improved.

This utility model relates to a press-fitting device for a support component on a shock absorber, including a fixture mounted on a workbench and a press-fitting component mounted on the workbench. The press-fitting component includes a sliding component located directly above the fixture, a transmission component that drives the sliding component to move up and down, a positioning component mounted in the middle of the sliding component and sliding vertically on the sliding component, and a clamping component mounted below the sliding component. This solves the technical problem that in existing shock absorber assembly, multiple components are in a movable state during pre-assembly, and the shock absorption effect fluctuates due to errors in the assembly position of the components during the press-fitting process.