67results about How to "Change the amount of compression" patented technology

The invention relates to a shock absorber which comprises a lower supporting seat, an upper supporting seat, a joint, a lower elastic piece and an adjusting piece, wherein the upper supporting seat is tightly pressed towards the lower supporting seat; the joint comprises a core block and a supporting rod, the core block is arranged between the upper supporting seat and the lower supporting seat, and the supporting rod extends out of the core block and penetrates through the upper supporting seat; the lower elastic piece is arranged between the core block and the lower supporting seat, and the adjusting piece is used for adjusting the distance between the upper supporting seat and the lower supporting seat. The stiffness valve of the shock absorber can be adjusted on an installation site so that the demand for different shock absorbing stiffness is met, and the adaptability of the shock absorber is stronger than that of a common shock absorber. Meanwhile, after the shock absorber is used for a long time, the stiffness variation of the shock absorber caused by the aging and creep deformation of the lower elastic piece can be corrected by readjusting the distance between the upper supporting seat and the lower supporting seat, and therefore the service life of the shock absorber is relatively prolonged.

The invention discloses a transmission shaft vibration absorber, and relates to the field of automobiles. The transmission shaft vibration absorber is designed to enable the matching frequency of the vibration absorber to be adjusted conveniently. The transmission shaft vibration absorber comprises an annular rubber block and a quality block arranged outside the annular rubber block, wherein a plurality of through holes are formed in the circumferential direction of the quality block, adjusting bolts are fastened in the through holes, springs are further arranged between the adjusting bolts and the rubber block, one end of each spring is connected with the annular rubber block in a butting mode, and the other end of the corresponding spring is connected with the corresponding adjusting bolt in a butting mode. The transmission shaft vibration absorber can be used in automobile manufacturing.

The invention discloses an edge cutting device capable of effectively preventing cloth from wrinkling, and relates to the technical field of cloth processing. To solve the wrinkle problem, specifically, the edge cutting device comprises a material guide mechanism and a cutting mechanism, wherein the material guide mechanism comprises two vertical plates fixed to the ground, as well as an adjustable clamping assembly, a damping clamping assembly and a tensioning assembly which are arranged on the outer walls of the vertical plates, the adjustable clamping assembly comprises pressing springs andfirst ejector pins, the tensioning assembly comprises tensioning springs and a tensioning roll, a tensioning frame is fixedly installed on the outer wall of each vertical plate, and a first sliding groove is formed in the inner wall of each tensioning frame. According to the edge cutting device, the damping clamping assembly and the tensioning assembly are arranged, when a conveying assembly is used for conveying, the damping clamping assembly can provide moving damping force for rotation of a cloth roll, due to the damping force, the two tensioning springs are pressed, thus downward tensionforce is generated for the cloth, so that the whole cloth is in a tension state, then wrinkles are avoided, and further, the size accuracy of a cutting assembly during cutting is guaranteed.

The invention discloses a yarn guiding device with a dust removing function, and relates to the technical field of textile. The problem of self-adaptive tension adjustment is solved. The yarn guidingdevice with the dust removing function specifically comprises a base, a workbench is connected to the outer wall of the top of the base through a lifting mechanism, and a self-adaptive adjustable damping mechanism and a yarn guiding mechanism are arranged on the outer wall of the top of the workbench; and the self-adaptive adjustable damping mechanism comprises an outer cover, a friction wheel andfour friction assemblies, the outer cover is rotationally connected with a third supporting plate through a rotating shaft, and the third supporting plate is fixed to the outer wall of the top of theworkbench through bolts. According to the yarn guiding device with the dust removing function, a friction plate is in sliding connection with the outer cover through a third sliding rod, the outer cover is in transmission fit with the yarn guiding mechanism, when the yarn feeding speed is increased, the rotating speed of the outer cover is increased, a transition plate is relatively fixed, the friction plate is subjected to outward centrifugal force to balance the elastic force of second springs at the moment, therefore, tension is reduced, and the purpose of self-adaptively adjusting the tension according to the yarn feeding speed is achieved.

The invention discloses a gas pressure reduction valve which comprises a valve body. The valve body is provided with an inlet channel and an outlet channel. A pressure reduction part is arranged in the valve body and comprises a valve core and a valve seat, the valve body is further in threaded connection with a pressure base, and a first spring is arranged between the pressure base and the valve core. The gas pressure reduction valve further comprises a regulating valve and a piston cavity, a piston is further arranged in the piston cavity, one side of the piston close to the valve core is provided with a connecting rod, and an outlet connecting pipe is further provided with a discharge valve. One side of the valve core close to the inlet channel is further fixedly connected with a guide rod, the pressure base or the valve body is provided with a hole in clearance fit with the guide rod, a gap between the hole and the guide rod is not larger than 0.5 mm, and the gap is axially sealed through at least one O-shaped ring. A second spring with the two ends in contact with the valve seat and the piston respectively are further arranged between the valve seat and the piston. The gas pressure reduction valve is simple in structure, long in service life and high in air outlet pressure regulation precision.

The invention discloses a gas valve structure, which comprises a valve body, an inlet channel and an outlet channel are arranged on the valve body, a decompression part is arranged in the valve body, the decompression part includes a valve core and a valve seat, and the valve body also has a A pressure seat is threadedly connected, a first spring is arranged between the pressure seat and the valve core, and a regulating valve and a piston chamber are also included. A piston is also arranged in the piston chamber, and a connecting rod is provided on the side of the piston close to the valve core. A discharge valve is also arranged on the outlet connecting pipe; a second spring with two ends in contact with the valve seat and the piston is also arranged between the valve seat and the piston. The invention has simple structure and high accuracy of regulating the outlet pressure.

A ball screw pair failure testing experiment table comprises an experiment table machine base, two supporting bases are arranged on the machine base, a standard ball nut supporting base and a to-be-tested ball nut supporting base are arranged between the two supporting bases, the ball nut supporting bases are respectively provided with two guide rail sliding holes and a ball nut mounting hole, guide rails are arranged in the guide rail sliding holes respectively, two ends of the guide rails are connected with the two supporting bases respectively, a standard ball nut is arranged in the standard ball nut mounting hole, two protrusions are arranged on the standard ball nut supporting base, the to-be-tested ball nut mounting hole is used for allowing a to-be-tested ball nut to be mounted, the two ball nuts are respectively in threaded connection with a ball screw, two springs are arranged between the two ball nut supporting bases, two ends of the two springs are connected with the standard ball nut supporting base and the to-be-tested ball nut supporting base respectively, two motors are arranged on the machine base and drive the two ball screws to rotate, and the two nut supporting bases move linearly.

The invention provides a quasi-zero stiffness vibration isolator with an energy recovery function, and belongs to the technical field of vibration isolation. The quasi-zero stiffness vibration isolator comprises a shell, a gear cam shaft and a rack shaft are connected into the shell, the axes of the gear cam shaft and the rack shaft are perpendicular, and the gear cam shaft is matched with the rack shaft. A slideway symmetrical about the axis of the gear cam shaft is arranged on the outer side of the shell, and a sliding column is embedded into the slideway, makes contact with an auxiliary spring and further makes contact with the cam end of the gear cam shaft; the adjusting mechanism is arranged at one end of the shell and makes contact with the rack shaft through a main spring. A gear pair is connected to the end, away from the cam, of the gear cam shaft and fixedly connected with an electric generator. The elastic direction of the auxiliary spring providing the negative stiffness isparallel to the elastic direction of a positive spring providing the positive stiffness, so that the transverse size of the vibration isolator is greatly reduced, and the vibration isolator can be applied to places with high space requirements; movement can be transmitted to the electric generator through gear transmission to achieve power generation, and energy recovery is achieved.

The invention discloses a self-stabilization single-face thin film restrictor with a prepressure adjusting function. The problem of adjusting prepressure of the single-face thin film restrictor and the problem that prepressure cannot adapt to the working condition are solved, the effect of adjusting prepressure of the restrictor is achieved, and therefore the restrictor is capable of meeting the application requirement of working condition changes. Prepressure fluctuation can be automatically stabilized to stably control the throttling gap and realize the ideal throttling ratio. According to the technical scheme, the self-stabilization single-face thin film restrictor comprises an upper valve body and a lower valve body, an elastic thin film is arranged between the upper valve body and the lower valve body, a prepressure cavity is formed between the bottom of the upper valve body and the elastic thin film and communicated with a throttling conical hole, an adjusting stud is arranged in the throttling conical hole, an upper oil outlet hole is formed in the adjusting stud, and a throttling conical valve is arranged in the upper oil outlet hole through an elastic element in a supported mode; a throttling cavity is formed between the bottom of the lower valve body and the elastic thin film, a throttling table is arranged at the top of the lower valve body, and the throttling cavity is communicated with a lower oil outlet hole through a throttling gap between the throttling table and the elastic thin film.

The invention provides a hidden type top-bottom hinge. The hidden type top-bottom hinge comprises a first component, a second component and a connecting force arm, wherein the two ends of the connecting force arm are hinged to the first component and the second component correspondingly; the connecting force arm comprises a first force arm body and a second force arm body; the first component comprises a hinge box, an installation frame, a transmission shaft, a damping assembly and a spring assembly; the installation frame is arranged in the hinge box; the transmission shaft, the damping assembly and the spring assembly are all positioned on the installation frame; the first force arm body abuts against the damping assembly through the transmission shaft so as to be used for providing buffering force for closed rotation of the connecting force arm when the first component and the second component are closed; and the second force arm body abuts against the spring assembly through the transmission shaft so as to be used for providing restoring force for closed rotation of the connecting force arm when the included angle between the first component and the second component is within apreset range, and therefore the closing speed of a door leaf or a window is moderate and stable.

The invention discloses a movable centre mechanism of a numerical control worm grinding wheel gear grinding machine. The movable centre mechanism of the numerical control worm grinding wheel gear grinding machine comprises a centre body and a centre shaft. The centre body comprises a centre base, a cover plate, an upper end cover and a lower end cover. The centre base, the cover plate, the upper end cover and the lower end cover are fixed together, and a cavity is formed among the centre base, the cover plate, the upper end cover and the lower end cover. The upper portion of the centre shaft is arranged in the cavity. The lower portion of the centre shaft penetrates out of the lower end cover. A Morse centre is installed on the centre shaft. A right-angle face is arranged on the upper portion of the center shaft. A first plate type rolling column chain and an inclined inlaid strip are arranged between each of the two straight faces of the right-angle face and the inner wall of the centre base. The bevels of the inclined inlaid strips are matched with the bevel of the inner wall of the centre base. The upper end cover and the lower end cover are both in a threaded connection with a first jackscrew. First locking nuts are arranged on the first jackscrews. The length of the inclined inlaid strips is smaller than the height of the cavity. The first plate type rolling column chains are shorter than the inclined inlaid strips. A tight ejecting mechanism is arranged on the cover plate. By means of the movable centre mechanism, the radial position of a centre and the pressing force of the centre on a workpiece can be precisely adjusted, adjustment is convenient, and adjusting precision is high.

The invention relates to a capping head. The capping head comprises an installation base and a lifting block which is matched with the installation base, the lower half portion of the lifting block is movably arranged in the installation base, a cap obtaining head is arranged on the bottom of the installation base, a positioning step which is matched with the installation base is arranged on the bottom of the lifting block, an adjusting block is arranged on the outer side of the upper half portion of the lifting block in a surrounding mode, the upper end of the adjusting block is connected with the lifting block, the vertical position of the adjusting block can be adjusted, a cavity is defined by the lifting block, the installation base and the adjusting block, a spring is arranged in the cavity, and the two ends of the spring abut against the adjusting block and the installation base respectively. The capping head is applicable to capping machines with pressure needing to be regulated.

The invention relates to the field of machining equipment, in particular to a grinding machine tail seat structure. The grinding machine tail seat structure comprises a casing, a sleeve and a center, wherein the sleeve is arranged in the casing, the center is arranged at one end of the sleeve, the tail part of the casing is provided with a rotating shaft, a shaft sleeve linked with the rotating shaft is connected onto the rotating shaft in a sleeving way, the grinding machine tail seat structure also comprises a shifting rod, one end of the shifting rod is fixedly arranged at the shaft sleeve, the other end of the shifting rod is fixedly arranged at the sleeve, a handle is also arranged on the rotating shaft, the tail part of the casing is provided with a lead screw, one end of the lead screw is embedded into the casing and is connected with the other end of the sleeve, the other end of the lead screw is arranged at the outside of the casing and is connected with the handle, a screw nut and a spring are connected onto the lead screw in a sleeving way, the screw nut is fixedly arranged on the casing through a pin element, one end of the spring is fixedly arranged at the screw nut, and the other end of the spring is fixedly arranged at the lead screw. The grinding machine tail seat structure adopting the technical scheme has the advantage that the pre-tightening force can be automatically adjusted.

The invention discloses a new energy automobile battery protection device, and relates to the technical field of new energy batteries. the invention aims to solve the life problem; the device specifically comprises a shell, a battery placement mechanism is arranged in the shell, the battery placement mechanism comprises four sets of damping assemblies, a placement base and a clamping assembly, thefour sets of damping assemblies are arranged at the four corners of the bottom of the placement base correspondingly, and each set of damping assembly comprises three sets of damping rods and six sets of universal ball structures; the top and the bottom of each set of damping rods are movably connected to the inner wall of the bottom of the shell and the outer wall of the bottom of the placementbase through universal ball structures respectively, the three sets of damping rods form a triangular pyramid structure, each damping rod comprises a first sleeve and a second sleeve, and the inner wall of the first sleeve and the inner wall of the second sleeve are movably connected with the same piston rod. According to the device, a spring II can be effectively prevented from being subjected tonon-axial displacement and spiral torque, the spring II can be well protected, and the service life thereof is prolonged.

The invention provides a crankshaft balance weight fan blade chamfering mechanism. The crankshaft balance weight fan blade chamfering mechanism comprises a cutting unit and a flexible cutter receding unit located behind the cutting unit. The cutting unit comprises a square-column-shaped cutter body, a positioning block fixed to the front side face of the cutter body, two cutters and a rolling piece, wherein the two cutters are symmetrically fixed to the upper portion of the left side face and the upper portion of the right side face of the cutter body in the horizontal direction, the rolling piece is installed at the front end of the top end of the positioning block through a pin shaft, and the rolling face of the rolling piece protrudes out of the front side face of the positioning block and is located in front of cutter blades. The flexible cutter receding unit comprises a cutter holder, an ejector block installed in the cutter holder, a compressed spring, a baffle and an adjusting threaded rod fixedly connected with the baffle, wherein the bottom end of the cutter holder is hinged to the bottom end of the cutter body. The chamfering mechanism has the advantages of being easy to install, convenient to use, high in machining precision and capable of reducing the loss of the cutters and waste products; the chamfering mechanism is used for conducting chamfering on a crankshaft balance weight fan blade, the machining cost can be greatly reduced, the product quality can be fully guaranteed, and the obvious economic benefits are achieved.

The invention relates to an anti-vibration impact-resistant rear part vibration isolator. The anti-vibration impact-resistant rear part vibration isolator comprises a shell and a central shaft, wherein a set of buffer adjustment device is arranged between each of the two ends of the central shaft and the corresponding inner wall of a hollow cavity; each buffer adjustment device comprises a rotary cover which covers the opening part of one end of the hollow cavity of the shell, a locking nut which is fixedly connected with the corresponding end part of the central shaft through threads and an open ring, a conical ring, a damping slide sheet, a spring sleeve, a first main spring and a complex spring which are sequentially in butt joint and pressing fit in a mutual match manner through the rotary cover, the locking nut and the inner wall of the shell; when the vibration isolator vibrates horizontally, the damping force of a damper is linear, so that a better vibration isolation effect is achieved; and during impact, the damping force of the damper is non-linear, so that a better buffering effect is achieved.

The invention discloses an intelligent assembling device based on a robot assembly line, relates to the technical field of intelligent assembling devices, and solves the problem that the quality of assembled products is uneven due to the fact that the assembling torque cannot be adjusted when assembling is carried out on an existing bottle cap and a bottle body. The intelligent assembling device based on the robot assembly line comprises a mounting part, and a supporting stand column is fixedly connected to one side of the top face of a working platform. A material distributing disc can regularly and circularly rotate a mechanical arm under the action of a grooved wheel mechanism of a driving assembly to place bottle body and bottle cap at the bottom of an assembling body, the assembling body achieves assembling of the bottle body and the bottle cap under the cooperation action of a linkage assembling assembly and a driven assembling assembly, the screwing torque of the assembling body can be adjusted, when the screwing torque is larger than the set torque of the assembling body, the assembling body can idle to protect the bottle body and the bottle cap from being abraded, use is stable, and the operation is easy and convenient.

The invention discloses a thrust plate reliability test device, which is characterized in that the thrust plate reliability test device comprises a tool clutch cover, a release bearing assembly, a positioning assembly and a thrust adjusting assembly, a positioning hole is formed in the middle of the tool clutch cover, a round hole is formed in the center of the release bearing assembly, one end of the release bearing assembly is provided with two symmetrical limiting ends and four symmetrical spring circular grooves, the positioning assembly is installed in the middle of the tool clutch cover, the thrust adjusting assembly is distributed on the left portion of the positioning assembly, the release bearing assembly is installed on the right portion of the positioning assembly, and the thrust adjusting assembly is matched with the release bearing assembly. The thrust plate reliability test device has the advantages of being compact in structure, easy to install, adjustable in stress, capable of being connected with an engine for real operation test and accurate in test result.