CN212717465U

CN212717465U - Oil cylinder with multistage cooperation

Info

Publication number: CN212717465U
Application number: CN202021131557.6U
Authority: CN
Inventors: 周春
Original assignee: Kunshan Qilit Oil Cylinder Hydraulic Equipment Co ltd
Current assignee: Kunshan Qilit Oil Cylinder Hydraulic Equipment Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-03-16
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses an oil cylinder with multistage fit, which comprises a cylinder body, a piston rod arranged in an oil cylinder cavity of the cylinder body, and a piston fixedly connected with the piston rod, wherein a connecting section in threaded connection with the piston is arranged at one end of the piston rod facing the piston; a taper section is arranged on one side of the connecting section, which is far away from the end part of the piston rod, and a taper part matched with the taper section is arranged on the inner side of the piston; and a first annular groove is formed in one side of the taper section, which is far away from the connecting section, the first annular groove is opposite to a second annular groove in the piston, and a buckle ring spring for hermetically connecting the annular grooves is arranged between the first annular groove and the second annular groove. The oil cylinder can prevent the piston rod and the piston from loosening, realize the precise matching of the piston rod and the piston and avoid the phenomenon of leakage and oil leakage in the clearance between the piston and the piston rod.

Description

Oil cylinder with multistage cooperation

Technical Field

The utility model relates to a hydro-cylinder field especially relates to a hydro-cylinder with multistage complex.

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion, has simple structure and reliable work, can omit a speed reducer when realizing reciprocating motion, has no transmission clearance and moves stably, and is widely applied to hydraulic systems of various machines.

In the use process of the oil cylinder, the conditions that the piston and the piston rod are loosened, the sliding screw thread of the piston rod falls off and is damaged and the like are easily caused. Hydraulic oil is leaked in a gap formed by connecting the piston and the piston rod, the service life of the oil cylinder is influenced, and potential safety hazards exist.

Disclosure of Invention

The utility model aims at providing a hydro-cylinder with multistage complex, this hydro-cylinder can prevent not hard up of piston rod and piston, realizes the precision fit of piston rod and piston, avoids piston and piston rod complex clearance the phenomenon of seepage oil leak to appear.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an oil cylinder with multistage matching comprises a cylinder body, a piston rod arranged in an oil cylinder cavity of the cylinder body, and a piston fixedly connected with the piston rod, wherein a connecting section in threaded connection with the piston is arranged at one end, facing the piston, of the piston rod; a taper section is arranged on one side of the connecting section, which is far away from the end part of the piston rod, and a taper part matched with the taper section is arranged on the inner side of the piston; and a first annular groove is formed in one side of the taper section, which is far away from the connecting section, the first annular groove is opposite to a second annular groove in the piston, and a buckle ring spring for hermetically connecting the annular grooves is arranged between the first annular groove and the second annular groove.

In the above technical solution, a projection area of the taper section on a projection plane perpendicular to an axis of the piston rod is gradually enlarged from a side facing the connecting section to a side of the first annular groove.

In the above technical solution, the connection section includes a first connection section located at the end of the piston rod, and a second connection section located at one side of the first connection section away from the end of the piston rod, and a diameter of the second connection section is greater than a diameter of the first connection section.

In the above technical scheme, a blind hole is arranged in the piston, and the connecting section, the taper section and the retainer ring are arranged in the blind hole.

In the above technical scheme, the connecting section is provided with an external thread, and the blind hole is internally provided with an internal thread matched with the external thread.

In the above technical scheme, the side wall of the piston is provided with a plurality of grooves, and the grooves are internally provided with wear-resistant rings or sealing rings.

In the above technical solution, the wear-resistant ring and the sealing ring are arranged at an interval.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

1. the utility model discloses in the piston rod towards the one end of piston set gradually with piston threaded connection's linkage segment, with the tapering section that the piston is sealed, and the buckle spring that the cooperation is connected, it is not hard up between piston and piston rod to have avoided, the smooth thread tooth of piston rod drops the damage, and has guaranteed the sealing connection of piston and piston rod, prevents that the phenomenon of seepage oil leak from appearing in piston and piston connection gap.

2. The linkage segment includes first linkage segment and second linkage segment, sets up multistage threaded connection, has strengthened its joint strength.

3. The anti-theft structure is formed by arranging the retaining ring spring in the first annular groove and the second annular groove and connecting the piston rod with the piston, the piston rod and the piston are fixedly connected, and the piston rod and the piston cannot be separated under the condition that the piston rod and the piston are not damaged.

Drawings

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

fig. 2 is a schematic structural view of the piston rod of the present invention;

fig. 3 is an enlarged schematic view of the piston structure of the present invention.

Wherein: 1. a cylinder body; 2. a piston; 3. a taper section; 4. a taper portion; 5. a first annular groove; 6. a second annular groove; 7. a buckle ring spring; 8. a first connection section; 9. a second connection section; 10. blind holes; 11. a groove; 12. a wear ring; 13. a seal ring; 14. a piston rod.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

the first embodiment is as follows: referring to fig. 1 to 3, an oil cylinder with multistage matching comprises a cylinder body 1, a piston rod 14 arranged in an oil cylinder cavity of the cylinder body 1, and a piston 2 fixedly connected with the piston rod 14, wherein a connecting section in threaded connection with the piston 2 is arranged at one end, facing the piston 2, of the piston rod 14; a taper section 3 is arranged on one side of the end part of the connecting section, which is far away from the piston rod 14, and a taper part 4 matched with the taper section 3 is arranged on the inner side of the piston 2; a first annular groove 5 is arranged on one side of the taper section 3, which is far away from the connecting section, the first annular groove 5 is opposite to a second annular groove 6 in the piston 2, and a retaining ring spring 7 for sealing and connecting the annular grooves is arranged between the first annular groove 5 and the second annular groove 6.

The connecting section in threaded connection with the piston 2, the taper section 3 sealed with the piston 2 and the buckle spring 7 connected in a matched mode are sequentially arranged at one end, facing the piston 2, of the piston rod 14, looseness between the piston 2 and the piston rod 14 is avoided, sliding threads of the piston rod 14 fall off and are damaged, sealing connection between the piston 2 and the piston rod 14 is guaranteed, and the phenomenon of leakage and oil leakage of a connecting gap between the piston 2 and the piston rod 14 is prevented.

Referring to fig. 2, the side surface of the tapered section 3 is a conical surface, and when a plane perpendicular to the axis of the piston rod 14 is taken as a projection plane, the projection area of the tapered section 3 on the projection plane gradually increases from a side toward the connecting section to a side toward the first annular groove 5.

In order to enhance the connection strength, the connection section comprises a first connection section 8 positioned at the end part of the piston rod 14 and a second connection section 9 arranged at one side of the first connection section 8, which is far away from the end part of the piston rod 14, wherein the diameter of the second connection section 9 is larger than that of the first connection section 8. The first connecting section 8 and the second connecting section 9 are both in threaded connection with the piston 2.

Referring to fig. 3, a blind hole 10 is formed in the piston 2, and after the piston rod 14 is tightly connected to the piston 2, the connecting section, the tapered section 3 and the first annular groove 5 are disposed in the blind hole.

The connecting section is provided with an external thread, and an internal thread matched with the external thread is arranged in the blind hole 10. Specifically, the first connecting section 8 and the second connecting section 9 are both provided with external threads.

Referring to fig. 1, a plurality of grooves 11 are formed in the side wall of the piston 2, and wear-resistant rings 12 or sealing rings 13 are disposed in the grooves 11. The wear-resistant ring 12 is arranged at a distance from the seal 13.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a hydro-cylinder with multistage complex, includes the cylinder body, set up the piston rod in the hydro-cylinder intracavity of cylinder body, and with piston rod fixed connection's piston, its characterized in that: a connecting section in threaded connection with the piston is arranged at one end, facing the piston, of the piston rod; a taper section is arranged on one side of the connecting section, which is far away from the end part of the piston rod, and a taper part matched with the taper section is arranged on the inner side of the piston; and a first annular groove is formed in one side of the taper section, which is far away from the connecting section, the first annular groove is opposite to a second annular groove in the piston, and a buckle ring spring for hermetically connecting the annular grooves is arranged between the first annular groove and the second annular groove.

2. The cylinder with multi-stage fit of claim 1, wherein: the projection area of the taper section on the projection plane perpendicular to the axis of the piston rod is gradually enlarged from one side of the connecting section to one side of the first annular groove.

3. The cylinder with multi-stage fit of claim 1, wherein: the connecting section comprises a first connecting section positioned at the end part of the piston rod and a second connecting section arranged at one side of the first connecting section, which is deviated from the end part of the piston rod, and the diameter of the second connecting section is larger than that of the first connecting section.

4. The cylinder with multi-stage fit of claim 1, wherein: a blind hole is formed in the piston, and the connecting section, the taper section and the first annular groove are arranged in the blind hole.

5. The cylinder with multi-stage fit of claim 4, wherein: the connecting section is provided with external threads, and internal threads matched with the external threads are arranged in the blind hole.

6. The cylinder with multi-stage fit of claim 1, wherein: the side wall of the piston is provided with a plurality of grooves, and wear-resisting rings or sealing rings are arranged in the grooves.

7. The cylinder with multi-stage fit of claim 6, wherein: the wear-resisting ring and the sealing ring are arranged at intervals.