CN213360625U

CN213360625U - High-sealing rotary oil cylinder

Info

Publication number: CN213360625U
Application number: CN202022231933.5U
Authority: CN
Inventors: 江海良; 浦佳贤
Original assignee: Wuxi Shenghui Hydraulic Pneumatic Components Co ltd
Current assignee: Wuxi Shenghui Hydraulic Pneumatic Components Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-06-04
Anticipated expiration: 2030-10-09

Abstract

The application relates to a high-tightness rotary oil cylinder, which relates to the technical field of rotary oil cylinders and mainly adopts the technical scheme that the rotary oil cylinder comprises a cylinder body and a piston rod arranged in the cylinder body, wherein the cylinder body is hollow, an oil pressure cavity is formed between the end wall of the piston rod and the inner side wall of the cylinder body, an oil supply hole communicated with the oil pressure cavity is formed in the cylinder body, and a sealing component used for sealing the oil pressure cavity is arranged on the piston rod; when the piston rod moves, the sealing assembly continuously keeps sealing on the oil pressure cavity, the possibility that the hydraulic oil enters the oil pressure cavity to leak is reduced, and the possibility that the oil pressure in the oil pressure cavity is reduced.

Description

High-sealing rotary oil cylinder

Technical Field

The application relates to the technical field of rotary oil cylinders, in particular to a high-sealing rotary oil cylinder.

Background

The rotary oil cylinder is a device which utilizes hydraulic pressure to generate high torque, the device has high power and can be accurately controlled, and the rotary oil cylinder is widely applied to the fields which require limited rotary motion and have high torque.

The utility model discloses an authorization publication number is CN 211314717U's used rotatory hydro-cylinder of die casting die, including the cylinder, front end housing and rear end cap are installed respectively to the cylinder both ends, and the slip is equipped with the piston in the cylinder, and the one end that the piston is close to the front end housing is equipped with the piston rod, is equipped with first hydraulic fluid port and second hydraulic fluid port on the curb plate of cylinder respectively.

To the correlation technique among the above-mentioned, the inventor thinks that hydraulic oil gets into in the cylinder through the second hydraulic fluid port, promotes the piston and removes, and the piston promotes the piston rod again and stretches out, and piston rod are moving the in-process repeatedly, constantly rubs with the inside wall of cylinder, and in the long-term use process, produce the gap easily between piston and piston rod and the cylinder, lead to hydraulic oil to leak, and the oil pressure reduces.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that hydraulic oil leaks and leads to the oil pressure to reduce, this application provides a high leakproofness gyration hydro-cylinder.

The application provides a high leakproofness rotary cylinder adopts following technical scheme:

the utility model provides a high leakproofness rotary cylinder, includes the cylinder body and sets up the piston rod in the cylinder body, the cavity sets up in the cylinder body, the end wall of piston rod with form the oil pressure cavity between the inside wall of cylinder body, be equipped with the oil feed hole that is linked together with the oil pressure cavity on the cylinder body, be equipped with the seal assembly who is used for sealing the oil pressure cavity on the piston rod.

Through adopting above-mentioned technical scheme, at the during operation, through the oil feeding hole to the injection hydraulic oil in the oil pressure cavity, the oil pressure increase in the oil feeding cavity to promote the piston rod and remove, at the piston rod removal in-process, last to keep sealed to the oil pressure cavity through seal assembly, reduce the possibility that takes place to leak behind hydraulic oil gets into the oil pressure cavity, reduce the possibility that the oil pressure in the oil pressure cavity dropped.

Optionally, seal assembly including set up the push rod of connection on the piston rod that slides, articulate the connecting rod on the push rod and set up the sealed pad on the piston rod, be equipped with the seal groove on the piston rod, sealed pad is filled in the seal groove, sealed side with the inside wall of cylinder body is inconsistent, the inside sealed cavity that is equipped with of piston rod, the one end of push rod is located sealed cavity, the other end stretches out sealed cavity and stretches into in the oil pressure cavity, the connecting rod is located sealed cavity, the one end that the push rod was kept away from to the connecting rod stretches into in the seal groove, the connecting rod stretch into one end in the seal groove with sealed pad is inconsistent.

Through adopting above-mentioned technical scheme, when the oil pressure increase in the oil pressure cavity, when the piston rod removed, the push rod stretched into simultaneously in the sealed cavity, thereby the push rod promoted in the connecting rod stretched into the seal groove, thereby the connecting rod promoted sealed the pad and stretched out the seal groove, when the piston rod removed, sealed the inside wall inconsistent with the cylinder body, thereby keep the sealed in the oil pressure cavity, with this reduction piston rod at the removal in-process, take place wearing and tearing and lead to the oil pressure cavity to take place the possibility of leaking between the inside wall of piston rod and cylinder body.

Optionally, one end of the push rod extending into the oil pressure cavity is fixedly connected with a pressing plate, and the cross-sectional area of the pressing plate is larger than that of the push rod.

Through adopting above-mentioned technical scheme, the clamp plate increases the area of contact between push rod and the hydraulic oil, and the lifting surface area of increase push rod is favorable to the push rod to remove smoothly.

Optionally, a partition plate is annularly arranged on the circumferential wall of the pressure plate, and an isolation groove for inserting the partition plate is arranged on the piston rod.

Through adopting above-mentioned technical scheme, when the push rod removed, the division board inserted in the isolation groove to this separation hydraulic oil and push rod reduce the possibility that hydraulic oil passes through the push rod and gets into in the sealed cavity.

Optionally, the isolation groove is filled with a friction pad, and a side surface of the friction pad is attached to a side surface of the isolation plate.

Through adopting above-mentioned technical scheme, the friction pad reduces the possibility that division board and the groove lateral wall direct contact of isolation groove, reduces the possibility that takes place wearing and tearing between division board and the isolation groove, reduces the possibility that hydraulic oil gets into in the isolation groove.

Optionally, a top plate is arranged on the end wall of the connecting rod, and the side surface of the top plate is abutted to the sealing gasket.

Through adopting above-mentioned technical scheme, the roof increases the area of contact between connecting rod and the sealed pad, is favorable to the ejector pin to promote smoothly that sealed pad stretches out the seal groove.

Optionally, a sealing spring is fixedly arranged on the side face of the top plate, and one end, far away from the top plate, of the sealing spring is abutted to the side face of the sealing gasket.

Through adopting above-mentioned technical scheme, sealing spring lasts the extrusion sealed pad, keeps laminating between the inside wall of sealed pad and cylinder body, reduces the possibility that the leakproofness reduces between piston rod and the cylinder body inside wall.

Optionally, a guide groove is formed in the sealed cavity, and the push rod is connected in the guide groove in a sliding manner.

By adopting the technical scheme, when the push rod moves, the guide groove limits the moving direction of the push rod, and the possibility of the push rod shifting in the moving process is reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in the working process, hydraulic oil is injected into the oil pressure cavity through the oil supply hole, the oil pressure in the oil supply cavity is increased, and the piston rod is pushed to move;

2. the pressure plate increases the contact area between the hydraulic oil and the push rod, which is beneficial to increasing the stress area of the push rod, so that the push rod is smoothly pushed to move when the hydraulic pressure in the oil pressure cavity is increased;

3. the contact area between the connecting rod and the sealing gasket is increased by the top plate, and when the connecting rod moves, friction between the friction gasket and the inner side wall of the cylinder body is extruded, so that the sealing performance between the piston rod and the inner side wall of the cylinder body is further improved.

Drawings

Fig. 1 is a schematic view of the overall structure of a high-tightness slewing cylinder in the embodiment.

FIG. 2 is a schematic sectional view showing the structure of the cylinder, the piston rod, the rotary gear, the transmission teeth and the seal assembly according to the embodiment.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Description of reference numerals: 1. a cylinder body; 11. a piston rod; 111. a transmission tooth; 112. sealing the cavity; 113. a guide groove; 114. a sealing groove; 115. an isolation trench; 116. a friction pad; 12. connecting blocks; 13. a rotating gear; 14. an oil pressure cavity; 15. an oil supply hole; 16. a transmission notch; 2. a seal assembly; 21. a push rod; 211. pressing a plate; 212. a separator plate; 22. a connecting rod; 221. a top plate; 222. a seal spring; 23. and a gasket.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses high leakproofness gyration hydro-cylinder.

Referring to fig. 1 and 2, the high-sealing rotary oil cylinder includes a cylinder body 1, a piston rod 11, a connecting block 12 and a rotary gear 13, the cylinder body 1 is hollow, the piston rod 11 is connected in the cylinder body 1 in a sliding manner, an oil pressure cavity 14 is formed between an end wall of the piston rod 11 and an inner side wall of the cylinder body 1, two oil pressure cavities 14 are provided, the piston rod 11 is located between the two oil pressure cavities 14, the cylinder body 1 is provided with oil supply holes 15 communicated with the oil pressure cavities 14, the number of the oil supply holes 15 is four, the four oil supply holes 15 are arranged in pairs in an opposite manner, the two oil supply holes 15 correspond to one oil pressure cavity 14, the connecting block 12 is welded on the bottom wall of the cylinder body 1, the rotary gear 13 is rotatably connected in the connecting block 12, one side of the cylinder body 1, which is close to the rotary, the transmission teeth 111 are meshed with the rotating gear 13, two sealing assemblies 2 for sealing the oil pressure cavity 14 are arranged at one end, close to the oil pressure cavity 14, of the piston rod 11, and the two sealing assemblies 2 correspond to the two oil pressure cavities 14 one by one; when the hydraulic oil pump works, hydraulic oil is injected into the oil pressure cavity 14 through the oil supply hole 15, enters the oil pressure cavity 14 to increase oil pressure, so that the end wall of the piston rod 11 is extruded to push the piston rod 11 to move, and the hydraulic oil in the other oil pressure cavity 14 is converged through the oil supply hole 15 to discharge the hydraulic oil; when the piston rod 11 moves, the piston rod 11 drives the transmission teeth 111 to move, and further drives the rotating gear 13 to rotate, so that the steps are repeated continuously, and the rotating gear 13 can be driven to rotate repeatedly.

Referring to fig. 2, during the movement of the piston rod 11, the sealing assembly 2 maintains the sealing of the sealing cavity 112, thereby reducing the possibility of a gap between the piston rod 11 and the inner side wall of the cylinder 1 during the repeated movement, reducing the possibility of leakage of the hydraulic oil in the oil pressure cavity 14 through the gap, reducing the possibility of reduction of the oil pressure in the oil pressure cavity 14, and reducing the possibility of abnormal slippage of the piston rod 11.

Referring to fig. 3, the sealing assembly 2 includes a push rod 21, connecting rods 22 and a sealing gasket 23, a sealing cavity 112 is disposed in one side of the piston rod 11 close to the oil pressure cavity 14, the push rod 21 is slidably connected to an end wall of the piston rod 11, the push rod 21 is disposed along an axial direction of the piston rod 11, one end of the push rod 21 is disposed in the sealing cavity 112, the other end is disposed in the oil pressure cavity 14, a guide groove 113 is disposed in the sealing cavity 112, the push rod 21 is slidably connected to the guide groove 113, the guide groove 113 is disposed along the axial direction of the piston rod 11, an end wall of the connecting rod 22 is hinged to a side surface of the push rod 21, two connecting rods 22 are disposed, the push rod 21 is disposed between two connecting rods 22, the connecting rods 22 are disposed along a radial direction of the piston rod 11, a sealing groove 114 is disposed on an outer side wall of the piston rod 11, the sealing gasket, the cross-sectional area of the top plate 221 is larger than that of the connecting rod 22, one side, away from the connecting rod 22, of the top plate 221 is fixedly connected with three sealing springs 222, one end, away from the top plate 221, of each sealing spring 222 is abutted to the side face of the corresponding sealing gasket 23, and the three piston rods 11 are uniformly distributed along the circumferential direction of the sealing groove 114; after the oil pressure in the oil pressure cavity 14 is increased, before the piston rod 11 is pushed to move, the push rod 21 is pushed to extend into the sealing cavity 112, the guide groove 113 limits the moving direction of the push rod 21, the push rod 21 pushes the connecting rod 22 to extend into the sealing groove 114, the connecting rod 22 pushes the top plate 221 to move, the top plate 221 pushes the sealing spring 222 to generate compression deformation, the sealing spring 222 pushes the sealing gasket 23 to extend out of the sealing groove 114 to be abutted to the inner side wall of the cylinder body 1, therefore, when the piston rod 11 moves, the sealing gasket 23 continuously keeps sealing the oil pressure cavity 14, and the possibility of leakage of hydraulic oil is reduced.

Referring to fig. 3, a pressing plate 211 is welded to one end of the push rod 21 located in the oil pressure cavity 14, the cross-sectional area of the pressing plate 211 is larger than that of the push rod 21, an isolation plate 212 is annularly arranged on the peripheral wall of the pressing plate 211, an isolation groove 115 into which the isolation plate 212 is inserted is arranged on the end wall of the piston rod 11, a friction pad 116 is adhered in the isolation groove 115, and the friction pad 116 is attached to the side surface of the isolation plate 212; the pressure plate 211 increases the contact area between the push rod 21 and the hydraulic oil, which is beneficial to smoothly pushing the push rod 21 to move when the oil pressure in the oil pressure cavity 14 is increased, and meanwhile, the isolation plate 212 is inserted into the isolation groove 115, so that the possibility that the hydraulic oil enters the sealed cavity 112 is reduced; the friction pad 116 fills the gap between the isolator plate 212 and the isolator slot 115, reducing the likelihood of hydraulic oil entering the isolator slot 115.

The implementation principle of a high leakproofness rotary cylinder of the embodiment of this application does: when the hydraulic oil cylinder works, hydraulic oil is injected into the oil pressure cavity 14 through the oil supply hole 15, the oil pressure in the oil pressure cavity 14 is increased, the piston rod 11 is smoothly pushed to move after the oil pressure is increased, the sealing performance of the piston rod 11 on the oil pressure cavity 14 is kept through the sealing assembly 2 in the moving process of the piston rod 11, the possibility that a gap is generated between the piston rod 11 and the inner side wall of the cylinder body 1 in the moving process is reduced, and the possibility that the oil pressure is reduced due to leakage of the hydraulic oil in the oil pressure cavity 14 is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a high leakproofness rotary cylinder which characterized in that: the oil cylinder comprises a cylinder body (1) and a piston rod (11) arranged in the cylinder body (1), wherein the cylinder body (1) is hollow, an oil pressure cavity (14) is formed between the end wall of the piston rod (11) and the inner side wall of the cylinder body (1), an oil supply hole (15) communicated with the oil pressure cavity (14) is formed in the cylinder body (1), and a sealing assembly (2) used for sealing the oil pressure cavity (14) is arranged on the piston rod (11);

the sealing component (2) comprises a push rod (21) which is connected with the piston rod (11) in a sliding way, a connecting rod (22) which is hinged on the push rod (21) and a sealing gasket (23) which is arranged on the piston rod (11), a sealing groove (114) is arranged on the piston rod (11), the sealing gasket (23) is filled in the sealing groove (114), the side surface of the sealing gasket (23) is abutted against the inner side wall of the cylinder body (1), a sealed cavity (112) is arranged in the piston rod (11), one end of the push rod (21) is positioned in the sealed cavity (112), the other end of the push rod extends out of the sealed cavity (112) and into the oil pressure cavity (14), the connecting rod (22) is positioned in the sealing cavity (112), one end of the connecting rod (22) far away from the push rod (21) extends into the sealing groove (114), one end of the connecting rod (22) extending into the sealing groove (114) is abutted to the sealing gasket (23).

2. The high-tightness rotary cylinder according to claim 1, characterized in that: one end of the push rod (21) extending into the oil pressure cavity (14) is fixedly connected with a pressing plate (211), and the cross sectional area of the pressing plate (211) is larger than that of the push rod (21).

3. The high-tightness rotary cylinder according to claim 2, characterized in that: the peripheral wall of the pressure plate (211) is provided with a partition plate (212) in a surrounding mode, and the piston rod (11) is provided with a partition groove (115) for inserting the partition plate (212).

4. The high-tightness rotary cylinder according to claim 3, characterized in that: the isolation groove (115) is filled with a friction pad (116), and the side surface of the friction pad (116) is attached to the side surface of the isolation plate (212).

5. The high-tightness rotary cylinder according to claim 1, characterized in that: the end wall of the connecting rod (22) is provided with a top plate (221), and the side surface of the top plate (221) is abutted to the sealing gasket (23).

6. The high-tightness rotary cylinder according to claim 5, characterized in that: and a sealing spring (222) is fixedly arranged on the side surface of the top plate (221), and one end, far away from the top plate (221), of the sealing spring (222) is abutted against the side surface of the sealing gasket (23).

7. The high-tightness rotary cylinder according to claim 1, characterized in that: a guide groove (113) is formed in the sealed cavity (112), and the push rod (21) is connected in the guide groove (113) in a sliding mode.