CN220185497U

CN220185497U - Hydraulic cylinder piston

Info

Publication number: CN220185497U
Application number: CN202321187107.2U
Authority: CN
Inventors: 杨辉; 张志献; 李正凤
Original assignee: Yangzhou Yongfa Pneumatic Hydraulic Equipment Co ltd
Current assignee: Yangzhou Yongfa Pneumatic Hydraulic Equipment Co ltd
Priority date: 2023-05-17
Filing date: 2023-05-17
Publication date: 2023-12-15
Anticipated expiration: 2033-05-17

Abstract

The utility model belongs to the technical field of hydraulic cylinder pistons, and particularly relates to a hydraulic cylinder piston which comprises a piston body, wherein a piston rod is connected to the upper end of the interior of the piston body in a threaded manner, an anti-collision device is arranged at the bottom of the piston body and comprises a buffer unit and a connecting unit, the buffer unit is arranged at the bottom of the piston body, the connecting unit is arranged at the bottom of the buffer unit, supporting blocks are fixedly arranged on the left side and the right side of the bottom of the piston body, a connecting rod is fixedly arranged on one side, adjacent to the two supporting blocks, of the piston body, and a sealing device is arranged on the outer surface of the piston body. This pneumatic cylinder piston avoids the piston to take place too big collision with the hydraulic cylinder body in the use through setting up buffer stop, causes the damage to the piston, influences the life of piston, has solved the piston and has taken place the collision with the hydraulic cylinder body easily in the use that proposes among the prior art to influence the life problem of piston, improve the device leakproofness through setting up sealing device, avoid fluid to reveal.

Description

Hydraulic cylinder piston

Technical Field

The utility model relates to the technical field of hydraulic cylinder pistons, in particular to a hydraulic cylinder piston.

Background

The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The device has simple structure and reliable operation. When it is used to realize reciprocating motion, it can eliminate speed reducer, and has no transmission clearance and smooth motion, so that it can be widely used in hydraulic systems of various machines. The output force of the hydraulic cylinder is in direct proportion to the effective area of the piston and the pressure difference between two sides of the effective area of the piston; the hydraulic cylinder basically consists of a cylinder barrel, a cylinder cover, a piston rod, a sealing device, a buffer device and an exhaust device. The structure of the piston often has a very important influence on the quality of the hydraulic cylinder.

However, in the use process of the existing hydraulic cylinder, the piston has poor sealing effect along with the abrasion of the sealing ring, and the defect of difficult replacement of the sealing ring exists.

As disclosed in chinese patent CN213270544U, when the sealing ring is damaged, the positioning ring is rotated to remove the positioning ring, the sealing disc is removed, the old sealing ring is removed, a new sealing ring is installed, and the sealing disc with the new sealing ring installed is connected to the piston body, and the sealing disc is abutted to the outer wall of the piston rod through the arc block, so as to prevent the piston rod from being separated from the piston body due to rotation.

However, the piston is easy to collide with the hydraulic cylinder body in the use process, so that the service life of the piston is influenced.

For this reason, it is highly desirable to provide a hydraulic cylinder piston.

Disclosure of Invention

The utility model aims to provide a hydraulic cylinder piston, which solves the problem that the piston is easy to collide with a hydraulic cylinder body in the using process in the background technology, so that the service life of the piston is influenced.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the hydraulic cylinder piston comprises a piston body, wherein a piston rod is connected to the upper end of the inner portion of the piston body in a threaded mode, and an anti-collision device is arranged at the bottom of the piston body.

The anti-collision device comprises a buffer unit and a connecting unit, wherein the buffer unit is arranged at the bottom of the piston body, and the connecting unit is arranged at the bottom of the buffer unit.

The buffer unit comprises supporting blocks, connecting rods, springs, sliding blocks and first rotating shafts, wherein the supporting blocks are fixedly arranged on the left side and the right side of the bottom of the piston body, the connecting rods are fixedly arranged on the adjacent sides of the two supporting blocks, the springs are sleeved on the left side and the right side of the outer surfaces of the connecting rods, the sliding blocks are slidably connected on the outer surfaces of the connecting rods and are located at one ends of the springs away from the supporting blocks, and the first rotating shafts are fixedly arranged at the lower ends inside the sliding blocks.

Preferably, the connecting unit comprises a first connecting piece, a second rotating shaft, a fixing plate, a pressing plate and a buffer rod, wherein the first connecting piece is rotationally connected to the outer surface of the first rotating shaft on the left side, the second connecting piece is rotationally connected to the outer surface of the first rotating shaft on the right side, the second rotating shaft penetrates through the lower ends in the first connecting piece and the second connecting piece, the buffer rod is fixedly installed at the bottom of the piston body, the pressing plate is fixedly installed at the bottom of the buffer rod, and one side, close to the piston body, of the pressing plate is fixedly installed at the front end and the rear end of the second rotating shaft.

Preferably, the outer surface of the piston body is provided with a sealing device, the sealing device comprises a sealing ring, an O-shaped ring, a gray ring and a dirt receiving ring, the sealing ring is arranged at the upper end inside the piston body, the O-shaped ring is sleeved at the upper end of the outer surface of the piston body, the gray ring is sleeved at the middle part of the outer surface of the piston body, and the dirt receiving ring is sleeved at the lower end of the outer surface of the piston body.

Preferably, the sealing groove is formed in the upper end of the inner portion of the piston body, the sealing ring is installed in the sealing groove, and a gap at the joint of the piston rod and the piston body is sealed through the sealing ring, so that fluid is prevented from entering the gap.

Preferably, the standing groove the same with O shape circle size has been seted up to piston body surface upper end, and the placing of O shape circle of being convenient for prevents that fluid from revealing between piston body and pneumatic cylinder, the mounting groove equal with the check round shape has been seted up at piston body surface middle part, and the installation of check round of being convenient for improves the leakproofness of piston through the check round, the dirt groove that receives that is the same with dirt round shape is seted up to piston body surface lower extreme, adsorbs the impurity in the fluid.

Preferably, the lower end of the first connecting piece is located outside the lower end of the second connecting piece, so that the first connecting piece and the second connecting piece can rotate around the second rotating shaft conveniently.

Preferably, the piston body is internally provided with a thread groove, and the piston rod is conveniently installed on the piston body through the thread groove.

Compared with the prior art, the utility model has the beneficial effects that:

1. this pneumatic cylinder piston avoids the piston to take place too big collision with the hydraulic cylinder body in the use through setting up buffer stop, causes the damage to the piston, influences the life of piston, has solved the piston and has collided with the hydraulic cylinder body easily in the use that proposes among the background art to influence the life problem of piston.

2. This pneumatic cylinder piston improves the device leakproofness through setting up sealing device, avoids fluid to reveal.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a seal arrangement according to the present utility model;

FIG. 3 is a schematic view of an anti-collision device according to the present utility model;

fig. 4 is a schematic structural view of an anti-collision device according to the present utility model.

In the figure: 1. a piston body; 2. a piston rod; 301. a support block; 302. a connecting rod; 303. a spring; 304. a slide block; 305. a first rotating shaft; 306. a first connector; 307. a second connector; 308. a second rotating shaft; 309. a fixing plate; 310. a pressing plate; 311. a buffer rod; 401. a seal ring; 402. an O-ring; 403. a Gelai circle; 404. and (5) a dirt receiving ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides a pneumatic cylinder piston, includes piston body 1, and piston body 1 inside upper end threaded connection has piston rod 2, and piston body 1 is inside to be seted up in the screw thread groove, is convenient for install on piston body 1 piston rod 2 through the screw thread groove, and piston body 1's material is carbon fiber reinforced metal matrix composite, and piston body 1 bottom is provided with buffer stop.

The anti-collision device comprises a buffer unit and a connecting unit, wherein the buffer unit is arranged at the bottom of the piston body 1, and the connecting unit is arranged at the bottom of the buffer unit.

The buffer unit comprises supporting blocks 301, connecting rods 302, springs 303, sliding blocks 304 and first rotating shafts 305, wherein the supporting blocks 301 are fixedly arranged on the left side and the right side of the bottom of the piston body 1, the connecting rods 302 are fixedly arranged on the adjacent sides of the two supporting blocks 301, the springs 303 are sleeved on the left side and the right side of the outer surface of the connecting rods 302, the springs 303 are extruded through the sliding blocks 304, so that the impact on the piston body 1 is reduced, the service life of the piston body 1 is prolonged, the sliding blocks 304 are slidably connected on the outer surface of the connecting rods 302 and are located at one ends, far away from the supporting blocks 301, of the springs 303, and the first rotating shafts 305 are fixedly arranged at the lower ends inside the sliding blocks 304.

The connecting unit comprises a first connecting piece 306, a second connecting piece 307, a second rotating shaft 308, a fixing plate 309, a pressing plate 310 and a buffer rod 311, wherein the first connecting piece 306 is rotationally connected to the outer surface of the left first rotating shaft 305, the second connecting piece 307 is rotationally connected to the outer surface of the right first rotating shaft 305, the lower end of the first connecting piece 306 is positioned at the outer side of the lower end of the second connecting piece 307, the first connecting piece 306 and the second connecting piece 307 are conveniently rotated around the second rotating shaft 308, the second rotating shaft 308 penetrates through the inner lower ends of the first connecting piece 306 and the second connecting piece 307, the buffer rod 311 is fixedly arranged at the bottom of the piston body 1, the pressing plate 310 is supported by the pressing plate 310, the pressing plate 310 is fixedly arranged at the bottom of the buffer rod 311, and the fixing plate 309 is fixedly arranged at the front end and the rear end of the second rotating shaft 308, which is close to one side of the pressing plate 310 of the piston body 1.

The piston body 1 surface is provided with sealing device, sealing device includes sealing washer 401, O shape circle 402, gray circle 403, and receive dirty circle 404, sealing washer 401 installs in the inside upper end of piston body 1, the seal groove has been seted up to the inside upper end of piston body 1, sealing washer 401 installs inside the seal groove, seal the gap of piston rod 2 and piston body 1 junction through sealing washer 401, avoid the fluid to get into the gap, O shape circle 402 cup joints in piston body 1 surface upper end, the standing groove the same with O shape circle 402 size has been seted up to piston body 1 surface upper end, be convenient for the placement of O shape circle 402, prevent that the fluid from revealing between piston body 1 and pneumatic cylinder, gray circle 403 cup joints in piston body 1 surface middle part, the mounting groove equal with gray circle 403 shape has been seted up at piston body 1 surface middle part, be convenient for the installation of gray circle 403, improve the leakproofness of piston through gray circle 403, receive dirty circle 404 cup joints in piston body 1 surface lower extreme, piston body 1 surface lower extreme has seted up and has received dirty groove the same shape with receiving dirty circle 404, adsorb the impurity in the fluid.

When the piston body 1 collides with the hydraulic cylinder body in use, the buffer rod 311 is extruded through the pressing plate 310, and meanwhile, the sliding block 304 is pushed to extrude the spring 303 through the rotation of the first connecting piece 306 and the second connecting piece 307 around the second rotating shaft 308, so that the impact on the piston body 1 is reduced, and the service life of the piston body 1 is prolonged.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

Claims

1. Hydraulic cylinder piston, comprising a piston body (1), characterized in that: the upper end of the interior of the piston body (1) is in threaded connection with a piston rod (2), and an anti-collision device is arranged at the bottom of the piston body (1);

the anti-collision device comprises a buffer unit and a connecting unit, wherein the buffer unit is arranged at the bottom of the piston body (1), and the connecting unit is arranged at the bottom of the buffer unit;

the buffer unit comprises supporting blocks (301), connecting rods (302), springs (303), sliding blocks (304) and first rotating shafts (305), wherein the supporting blocks (301) are fixedly installed on the left side and the right side of the bottom of a piston body (1), the connecting rods (302) are fixedly installed on one side, adjacent to the two supporting blocks (301), of each connecting rod, the springs (303) are sleeved on the left side and the right side of the outer surfaces of the connecting rods (302), the sliding blocks (304) are slidably connected to the outer surfaces of the connecting rods (302) and located at one ends, far away from the supporting blocks (301), of the springs (303), and the first rotating shafts (305) are fixedly installed at the lower ends inside the sliding blocks (304).

2. A hydraulic cylinder piston as claimed in claim 1, wherein: the connecting unit comprises a first connecting piece (306), a second connecting piece (307), a second rotating shaft (308), a fixing plate (309), a pressing plate (310) and a buffer rod (311), wherein the first connecting piece (306) is rotationally connected to the outer surface of the left first rotating shaft (305), the second connecting piece (307) is rotationally connected to the outer surface of the right first rotating shaft (305), the second rotating shaft (308) penetrates through the inner lower ends of the first connecting piece (306) and the second connecting piece (307), the buffer rod (311) is fixedly arranged at the bottom of the piston body (1), the pressing plate (310) is fixedly arranged at the bottom of the buffer rod (311), and one side, close to the piston body (1), of the fixing plate (309) is fixedly arranged at the front end and the rear end of the second rotating shaft (308).

3. A hydraulic cylinder piston as claimed in claim 1, wherein: the sealing device comprises a sealing ring (401), an O-shaped ring (402), a Gelai ring (403) and a dirt receiving ring (404), wherein the sealing ring (401) is arranged at the upper end inside the piston body (1), the O-shaped ring (402) is sleeved at the upper end of the outer surface of the piston body (1), the Gelai ring (403) is sleeved at the middle of the outer surface of the piston body (1), and the dirt receiving ring (404) is sleeved at the lower end of the outer surface of the piston body (1).

4. A hydraulic cylinder piston according to claim 3, wherein: a sealing groove is formed in the upper end of the interior of the piston body (1), and the sealing ring (401) is installed in the sealing groove.

5. A hydraulic cylinder piston according to claim 3, wherein: the novel sewage treatment device is characterized in that a placing groove with the same size as the O-shaped ring (402) is formed in the upper end of the outer surface of the piston body (1), a mounting groove with the same shape as the Gelai ring (403) is formed in the middle of the outer surface of the piston body (1), and a sewage containing groove with the same shape as the sewage containing ring (404) is formed in the lower end of the outer surface of the piston body (1).

6. A hydraulic cylinder piston as claimed in claim 2, wherein: the lower end of the first connecting piece (306) is positioned outside the lower end of the second connecting piece (307).

7. A hydraulic cylinder piston as claimed in claim 1, wherein: the piston body (1) is internally provided with a thread groove.