阅读说明：本技术 一种浮动活塞缓冲油缸 (Floating piston buffer oil cylinder ) 是由 丁博文 于 2021-10-25 设计创作，主要内容包括：本发明涉及一种浮动活塞缓冲油缸,主要由运动体、浮动活塞组件和缸体(300)组成；运动体主要由运动体缸体(100)、活塞端盖(110)组成；浮动活塞组件设置在运动体缸体内；运动体缸体(100)右端和带有节流阀(111)的活塞端盖(110)装配,运动体缸体(100)内部具有1个等径圆柱腔体,该腔体由左向右被浮动活塞组件分成3个腔室,分别是气腔(001)、活塞补偿腔(002)和调节小腔(003)；运动体(100)右部与缸体(300)连接；运动体(100)外径同缸体(300)内径配合。本发明可提高缓冲油缸中气体的密封性；补偿腔中的液压油可以提高浮动活塞组件的润滑性,降低活塞体滑块密封圈和活塞体密封圈的磨损,提高浮动活塞组件寿命。(The invention relates to a floating piston buffer oil cylinder, which mainly comprises a moving body, a floating piston assembly and a cylinder body (300); the moving body mainly comprises a moving body cylinder body (100) and a piston end cover (110); the floating piston assembly is arranged in the moving body cylinder; the right end of the moving body cylinder body (100) is assembled with a piston end cover (110) with a throttle valve (111), 1 equal-diameter cylindrical cavity is arranged in the moving body cylinder body (100), and the cavity is divided into 3 cavities from left to right by a floating piston assembly, namely an air cavity (001), a piston compensation cavity (002) and a small adjusting cavity (003); the right part of the moving body (100) is connected with the cylinder body (300); the outer diameter of the moving body (100) is matched with the inner diameter of the cylinder body (300). The invention can improve the air tightness of the buffer oil cylinder; the hydraulic oil in the compensation cavity can improve the lubricity of the floating piston assembly, reduce the abrasion of the piston body sliding block sealing ring and the piston body sealing ring and prolong the service life of the floating piston assembly.)

1. The utility model provides a floating piston cushion cylinder which characterized in that: mainly comprises a moving body, a floating piston assembly and a cylinder body (300); the moving body mainly comprises a moving body cylinder body (100) and a piston end cover (110); the floating piston assembly is arranged in the moving body cylinder; the right end of the moving body cylinder body (100) is assembled with a piston end cover (110) with a throttle valve (111), 1 equal-diameter cylindrical cavity is arranged in the moving body cylinder body (100), and the cavity is divided into 3 cavities from left to right by a floating piston assembly, namely an air cavity (001), a piston compensation cavity (002) and a small adjusting cavity (003); the right part of the moving body (100) is connected with the cylinder body (300); the outer diameter of the moving body (100) is matched with the inner diameter of the cylinder body (300).

2. The floating piston cushion cylinder of claim 1, wherein: the floating piston assembly mainly comprises a floating piston body (200), a piston body press ring (203), a piston body seal ring (202), a piston body slide block (201), a piston body slide block seal ring (204), a piston body elastic element (205), a piston body end cover (206) and a one-way valve (208); the floating piston body (200) is composed of two coaxial cylinders, wherein the right end of a large cylinder connected with a small cylinder is provided with a step, a piston body sealing ring (202) is arranged on the step, a piston body pressing ring (203) is arranged on the right side of the sealing ring, the small cylinder is provided with a T-shaped hole (207), a piston body end cover (206), a piston body elastic element (205) and a piston body sliding block (201) which are connected in sequence are arranged on the small cylinder, the piston body end cover is positioned at the right end of the small cylinder, one end of the T-shaped hole (207) is connected with a check valve (208) positioned at the right end of the small cylinder, and the other end of the T-shaped hole is communicated with the right surface of the large cylinder.

3. The floating piston cushion cylinder of claim 1, wherein: wherein the left end of the moving body cylinder (100) is provided with a connecting structure (101) for connecting with an external moving mechanism.

4. The floating piston cushion cylinder of claim 1, wherein: the air cavity (001) is connected with a moving body air injection nozzle (102) through an air injection channel (103).

5. The floating piston cushion cylinder of claim 4, wherein: the moving body gas injection nozzle (102) is connected with a gas injection valve.

6. The floating piston cushion cylinder of claim 1, wherein: the outer surface of the right end of the moving body (100) is hermetically connected with the inner wall of the cylinder body (300) to divide the cylinder body into a left cavity and a right cavity; the left end of the left cavity of the cylinder body (300) is sequentially provided with a sealing ring (301), a movable retainer ring (302), a pressure-assisting elastic element (303) and a fixed retainer ring (304).

7. The floating piston cushion cylinder of claim 6, wherein: a left cavity is formed between the left end of the inner cavity of the cylinder body (300) and the boss at the right end of the moving body (100).

8. The floating piston cushion cylinder of claim 6, wherein: the left cavity is communicated with an oil inlet (305) at the left part of the cylinder body (300).

9. The floating piston cushion cylinder of claim 6, wherein: an oil inlet (306) is arranged at the right end of the cylinder body (300) and is communicated with a cavity body (004) of the floating piston body through a right cavity.

10. The floating piston cushion cylinder of any one of claims 1-9, wherein: high-pressure gas is filled in a gas cavity (001) at the left side of the floating piston assembly.

Technical Field

The invention belongs to the technical field of oil cylinders, and particularly relates to a floating piston buffer oil cylinder.

Background

The traditional oil cylinder realizes gas sealing by a piston, a gas cavity and an oil cavity are respectively arranged on two sides of the piston, generally, through structural design, when the oil cylinder is in a stable working state, the pressure of oil in the oil cavity is higher than that of gas in the gas cavity, and the gas in the gas cavity can be reliably sealed.

However, when the oil chamber is in a non-working state for a long time, hydraulic oil in the oil chamber flows back under the action of gravity and the like, gas appears in the oil chamber, the pressure is reduced, the gas tightness in the gas chamber is reduced, and gas leakage of the gas chamber can be caused.

Disclosure of Invention

The invention provides a floating piston buffer oil cylinder, which aims to solve the technical problems that: high sealing performance can be maintained even in the case where the hydraulic oil is totally returned.

In order to solve the technical problems, the invention provides a floating piston buffer oil cylinder which is characterized in that: mainly composed of a moving body, a floating piston assembly and a cylinder 300; the moving body mainly comprises a moving body cylinder body 100 and a piston end cover 110; the floating piston assembly is arranged in the moving body cylinder; the right end of the moving body cylinder 100 is assembled with a piston end cover 110 with a throttle valve 111, the moving body cylinder 100 is internally provided with 1 equal-diameter cylindrical cavity which is divided into 3 cavities by a floating piston assembly from left to right, namely an air cavity 001, a piston compensation cavity 002 and an adjusting small cavity 003; the right part of the moving body 100 is connected with the cylinder 300; the outer diameter of the moving body 100 is matched with the inner diameter of the cylinder 300.

Has the advantages that: (1) the invention can improve the air tightness of the buffer oil cylinder; (2) the hydraulic oil in the compensation cavity 002 can improve the lubricity of the floating piston assembly, reduce the abrasion of the piston body sliding block sealing ring 204 and the piston body sealing ring 202, and improve the service life of the floating piston assembly.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

Fig. 2 is a schematic diagram of the working process of the present invention.

Detailed Description

In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention is provided.

The invention provides a floating piston buffer oil cylinder which mainly comprises a moving body, a floating piston assembly and a cylinder body 300; the moving body mainly comprises a moving body cylinder body 100 and a piston end cover 110;

the floating piston assembly is arranged in the moving body cylinder; the floating piston assembly consists of a floating piston body 200, a piston body press ring 203, a piston body sealing ring 202, a piston body sliding block 201, a piston body sliding block sealing ring 204, a piston body elastic element 205, a piston body end cover 206 and a one-way valve 208; the floating piston body 200 consists of two coaxial cylinders, wherein the right end of the connection of the large cylinder and the small cylinder is provided with a step, a piston body sealing ring 202 is arranged on the step, a piston body pressing ring 203 is arranged on the right side of the sealing ring, and after the assembly is finished, the inner diameter of the piston body sealing ring 202 is reduced under the compression of the step of the floating piston body 200 and the piston body pressing ring 203, the outer diameter is increased, and the sealing performance is improved; the small cylinder is provided with a T-shaped hole 207, the small cylinder is provided with a piston body end cover 206, a piston body elastic element 205 and a piston body sliding block 201 which are connected in sequence, the piston body end cover is positioned at the right end of the small cylinder, one end of the T-shaped hole 207 is connected with a check valve 208 positioned at the right end of the small cylinder, and the other end of the T-shaped hole is communicated with the right surface of the large cylinder.

The left end of the moving body cylinder 100 is provided with a connecting structure 101 for connecting with an external moving mechanism, the right end of the moving body cylinder is assembled with a piston end cover 110 with a throttle valve 111, 1 constant-diameter cylindrical cavity is arranged in the moving body cylinder 100, and the cavity is divided into 3 cavities from left to right by a floating piston assembly, namely an air cavity 001, a piston compensation cavity 002 and an adjusting small cavity 003;

the space between the right end face of the piston body sliding block 201 and the piston end cover 110 is an adjusting small cavity 003, and the space between the left end face of the piston body sliding block 201 and the right end face of the large cylinder is a piston compensation cavity 002; the left end surface of the large cylinder is communicated with the air cavity 001; the air cavity 001 is connected to a moving body air injection nozzle 102 through an air injection channel 103. The moving body insufflation nozzle 102 is connected to an insufflation valve. The throttle valve 111 is used to control the flow rate of the hydraulic oil flowing into the small chamber 003.

The right part of the moving body 100 is connected with the cylinder 300;

the outer diameter of the moving body 100 is matched with the inner diameter of the cylinder body 300, and the moving body and the cylinder body are sealed by sealing rings 301 and 104;

wherein, the outer surface of the right end of the moving body 100 is hermetically connected with the inner wall of the cylinder body 300 through a sealing ring 104, and the cylinder body is divided into a left cavity and a right cavity; the left end of the left cavity 307 of the cylinder body 300 is sequentially provided with a sealing ring 301, a movable retainer ring 302, a pressure-assisting elastic element 303 and a fixed retainer ring 304; the fixed retainer ring 304 is fixed at the left end of the inner cavity of the cylinder body 300; a left cavity is formed between the left end of the inner cavity of the cylinder body 300 and the boss at the right end of the moving body 100, and the left cavity 307 is communicated with an oil inlet 305 at the left part of the cylinder body 300; the right end of the cylinder body 300 is provided with an oil inlet 306 which is communicated with a cavity 004 of the floating piston body through a right cavity.

After the oil cylinder is assembled, oil entering through the oil inlet 305 enables the pressure-assisted elastic element 303 to be in a pressed state, the movable retainer ring 302 extrudes the sealing ring 301 to enable the sealing ring to be extruded and deformed, and the inner diameter is reduced so as to improve the sealing degree.

The working process is as follows:

high-pressure gas is arranged in the air cavity 001 on the left side of the floating piston assembly, when an external system needs the floating piston buffer oil cylinder to work, hydraulic oil flows into the cavity 004 of the floating piston buffer oil cylinder through the oil inlet 306, so that the cavity 004 of the buffer oil cylinder and the small adjusting cavity 003 are filled with the hydraulic oil, at the moment, the hydraulic oil enters the piston compensation cavity 002 through the check valve 208 and the T-shaped hole 207 due to pressure difference, and the pressure difference is formed at the two ends of the piston body sliding block 201, so that the elastic element 205 of the piston body is compressed. Finally, the system reaches mechanical balance. At this time, the hydraulic oil in the compensation chamber 002 has a higher pressure than the high-pressure gas in the gas chamber 001, and thus has an excellent sealing performance. At this time, if the hydraulic oil in the floating piston buffer cylinder cavity 004 flows back, the hydraulic oil still exists in the piston compensation cavity 002 due to the action of the check valve 208, and the piston body elastic element 205 is still in a compressed state. The pressure relationship between the two sides of the piston assembly remains unchanged, i.e. the hydraulic oil in the compensation chamber 002 has a higher pressure than the high pressure gas in the gas chamber 001, and still has excellent sealing performance.

In addition, the hydraulic oil in the compensation cavity 002 also has a lubricating effect, so that the service lives of the piston body sliding block sealing ring 204 and the piston body sealing ring 202 can be effectively prolonged.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.