CN215444581U

CN215444581U - Spring oil cylinder with double springs and low acting force

Info

Publication number: CN215444581U
Application number: CN202121169073.5U
Authority: CN
Inventors: 包志恒
Original assignee: Zhejiang Rouken Hydraulic Technology Co ltd
Current assignee: Zhejiang Rouken Hydraulic Technology Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-01-07
Anticipated expiration: 2031-05-28

Abstract

The utility model discloses a double-spring low-acting-force spring oil cylinder which comprises a cylinder body, an internal spring and a piston oil seal, wherein the external spring is arranged on the periphery of the cylinder body, a cylinder seat is arranged at the lower end of the cylinder body, the internal spring is arranged at the bottom end in the cylinder body, a piston is arranged at the upper end of the internal spring and is arranged in the cylinder body, a piston rod is arranged at the upper end of the piston and penetrates through the cylinder body upwards, a piston oil seal is arranged on the periphery of the middle part of the piston, a first wear-resisting ring is arranged below the piston oil seal, and a second wear-resisting ring is arranged above the piston oil seal. According to the utility model, through the design of the cylinder base, the external spring, the end cover, the internal spring and other structures, the oil cylinder does not need to be reset by hydraulic pressure, the overlarge return acting force of the piston rod of the oil cylinder can be effectively avoided, the piston rod is easier to reset, the two springs are respectively arranged inside and outside the cylinder body, and the piston rod is assisted to reset, so that the oil cylinder is more stable and labor-saving.

Description

Spring oil cylinder with double springs and low acting force

Technical Field

The utility model belongs to the technical field of hydraulic oil cylinders, and particularly relates to a spring oil cylinder with double springs and low acting force.

Background

The hydraulic oil cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion or swinging motion. Simple structure and reliable operation. When the reciprocating motion is realized by using the reciprocating motion device, a speed reducing device can be omitted, no transmission gap exists, the motion is stable, and the reciprocating motion device is widely applied to hydraulic systems of various machines. The spring oil cylinder with double springs and low acting force is one kind of hydraulic oil cylinder, and has double springs to assist the piston in resetting.

But the double spring needs the double piston pole to cooperate in the spring cylinder of the low effort of current double spring, and big spring housing is worked in little spring outside, and the spring dislocation easily breaks down, and the structure is complicated, and stability is not enough, and the wearability of piston is not enough in the spring cylinder of the low effort of current double spring in addition, and life is shorter, and stability is not enough, provides a spring cylinder of the low effort of double spring for this.

SUMMERY OF THE UTILITY MODEL

Aiming at the situation, in order to overcome the defects of the prior art, the utility model provides the spring oil cylinder with the double springs and low acting force, which effectively solves the problems that the double springs need double piston rods to be matched in the existing spring oil cylinder with the double springs and low acting force, a large spring sleeve works outside a small spring, the spring is easy to break due to dislocation, the structure is complex, and the stability is insufficient.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a spring cylinder of low effort of double spring, includes cylinder body, built-in spring and piston oil blanket, the cylinder body periphery is provided with external spring, and the cylinder body lower extreme is provided with the cylinder base, and the bottom is provided with built-in spring in the cylinder body, and built-in spring upper end is provided with the piston, and in the cylinder body was arranged in to the piston, the piston upper end had the piston rod, and the piston rod upwards passes through out the cylinder body, and piston middle part periphery is provided with the piston oil blanket, and piston oil blanket below is provided with first wear ring, and piston oil blanket top is provided with the wear ring of second.

Preferably, the lower end of the built-in spring is lapped with the middle part of the upper end of the cylinder seat, the upper end of the built-in spring is lapped with the lower end of the piston, and the built-in spring is clamped between the piston and the cylinder seat.

Preferably, the piston oil seal, the first wear-resisting ring and the second wear-resisting ring are fixed with the outer wall of the piston through clamping grooves, and the piston oil seal, the first wear-resisting ring and the second wear-resisting ring are connected with the inner wall of the cylinder body in a sliding mode.

Preferably, a guide sleeve is fixed on the position, connected with the piston rod, of the inner wall of the cylinder body through a clamping groove, an in-cylinder oil seal fixed with the inner wall of the cylinder body through the clamping groove is arranged above the guide sleeve, and a dustproof oil seal is connected to the middle of the upper end of the cylinder body through the clamping groove.

Preferably, uide bushing, in-cylinder oil blanket and dustproof oil blanket all with piston rod sliding connection, the shaping of piston rod upper end has the end cover, and the shaping of end cover upper end middle part has the connector.

Preferably, the cylinder base is formed at the lower end of the cylinder body, the lower end of the external spring is in lap joint with the periphery of the upper end of the cylinder base, the upper end of the external spring is in lap joint with the end cover, the external spring is clamped between the cylinder base and the end cover, and the inner wall of the external spring is in sliding connection with the outer wall of the cylinder body.

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

1) in the spring oil cylinder with the double springs and the low acting force, the oil cylinder is reset without depending on hydraulic pressure through the design of structures such as the cylinder seat, the external spring, the end cover, the internal spring and the like, so that the return acting force of an oil cylinder piston rod can be effectively prevented from being too large, the piston rod is easier to reset, the two springs are respectively arranged inside and outside the cylinder body, and meanwhile, the auxiliary piston rod is used for resetting, so that the oil cylinder is more stable and labor-saving, and the problems that the double springs need to be matched by the double piston rods in the existing spring oil cylinder with the double springs and the low acting force, the large spring is sleeved outside the small spring to work, the spring is easy to break down due to dislocation, the structure is complex, and the stability is insufficient are solved;

2) in the spring cylinder of this low effort of double spring, through the setting of first wear ring and second wear ring, make the wear resistance of piston promote greatly, and then make the life of piston increase greatly, make the stability and the life of spring cylinder all obtain promoting, solved the wearability of piston not enough in the spring cylinder of the low effort of current double spring, life is shorter, the not enough problem of stability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a connection structure of a cylinder body, a piston rod, a dust-proof oil seal and an end cover in the utility model;

FIG. 3 is a front cross-sectional view of the cylinder block of the present invention;

in the figure: 1. a cylinder body; 2. an external spring; 3. a cylinder base; 4. a built-in spring; 5. a piston; 6. a piston oil seal; 7. a first wear ring; 8. a second wear ring; 9. a piston rod; 10. a guide sleeve; 11. an in-cylinder oil seal; 12. a dustproof oil seal; 13. an end cap; 14. a connecting head.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In this embodiment, as shown in fig. 1-3, the present invention includes a cylinder body 1, an internal spring 4 and a piston oil seal 6, the external spring 2 is disposed on the periphery of the cylinder body 1, a cylinder base 3 is disposed at the lower end of the cylinder body 1, the internal spring 4 is disposed at the inner bottom end of the cylinder body 1, a piston 5 is disposed at the upper end of the internal spring 4, the piston 5 is disposed in the cylinder body 1, a piston rod 9 is disposed at the upper end of the piston 5, the piston rod 9 penetrates through the cylinder body 1 upward, the piston oil seal 6 is disposed on the periphery of the middle portion of the piston 5, a first wear-resistant ring 7 is disposed below the piston oil seal 6, and a second wear-resistant ring 8 is disposed above the piston oil seal 6.

In this embodiment, the lower end of the inner spring 4 is overlapped with the middle of the upper end of the cylinder base 3, the upper end of the inner spring 4 is overlapped with the lower end of the piston 5, and the inner spring 4 is clamped between the piston 5 and the cylinder base 3.

Hydraulic oil is loaded in the cylinder body 1 between the piston 5 and the cylinder seat 3, the lower end of the cylinder seat 3 is connected with hydraulic equipment such as a hydraulic pump and the like so as to increase or decrease the hydraulic oil in the cylinder body 1, and the built-in spring 4 can be reset by the aid of the piston 5 pressed downwards by the cylinder seat 3.

In this embodiment, the piston oil seal 6, the first wear-resistant ring 7 and the second wear-resistant ring 8 are all fixed to the outer wall of the piston 5 through the clamping grooves, and the piston oil seal 6, the first wear-resistant ring 7 and the second wear-resistant ring 8 are all connected with the inner wall of the cylinder body 1 in a sliding mode.

The piston oil seal 6 can improve the sealing performance of the piston 5, and the first wear-resisting ring 7 and the second wear-resisting ring 8 can greatly improve the wear resistance of the piston 5, so that the service life of the piston 5 is longer.

In this embodiment, a guide sleeve 10 is fixed on the position where the inner wall of the cylinder body 1 is connected with the piston rod 9 through a clamping groove, an in-cylinder oil seal 11 fixed with the inner wall of the cylinder body 1 through the clamping groove is arranged above the guide sleeve 10, and a dustproof oil seal 12 is connected to the middle part of the upper end of the cylinder body 1 through the clamping groove.

Piston rod 9 and piston 5 move in step, and uide bushing 10 wear resistance is splendid, can play wear-resisting and direction effect between cylinder body 1 and piston rod 9, and the interior oil blanket 11 of jar can promote the sealing performance between piston rod 9 and the cylinder body 1, and dustproof oil blanket 12 can prevent that external dust etc. from getting into in the cylinder body 1.

In this embodiment, the guide sleeve 10, the in-cylinder oil seal 11 and the dustproof oil seal 12 are all slidably connected to the piston rod 9, an end cover 13 is formed at the upper end of the piston rod 9, and a connector 14 is formed in the middle of the upper end of the end cover 13.

The external spring 2 is clamped between the cylinder base 3 and the end cover 13, and the external spring 2 can assist the pressed end cover 13 to reset by the aid of the cylinder base 3.

In this embodiment, the cylinder base 3 is formed at the lower end of the cylinder body 1, the lower end of the external spring 2 is in peripheral lap joint with the upper end of the cylinder base 3, the upper end of the external spring 2 is in lap joint with the end cover 13, the external spring 2 is clamped and pressed between the cylinder base 3 and the end cover 13, and the inner wall of the external spring 2 is in sliding connection with the outer wall of the cylinder body 1.

The cylinder base 3 and the cylinder body 1 are integrally formed, and the cylinder base 3 provides support for the external spring 2.

The working principle is as follows: the hydraulic cylinder has the advantages that hydraulic oil is loaded in the cylinder body 1 between the piston 5 and the cylinder seat 3, the lower end of the cylinder seat 3 is connected with hydraulic equipment such as a hydraulic pump and the like, so that the hydraulic oil is added into or reduced from the cylinder body 1, when the end cover 13 is pressed down, the hydraulic oil in the cylinder body 1, the built-in spring 4 and the external spring 2 can play a role in buffering, when the hydraulic cylinder resets or lifts and pushes other objects, the built-in spring 4 and the external spring 2 can reset by means of the piston 5 and the end cover 13 which are pressed down under the assistance of the cylinder seat 3, the hydraulic cylinder does not need to reset by means of hydraulic pressure, the return acting force of a piston rod 9 of the hydraulic cylinder can be effectively avoided being too large, and the piston rod 9 is enabled to reset more easily.

It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a spring cylinder of low effort of double spring, includes cylinder body, innerspring and piston oil seal, its characterized in that: the cylinder body periphery is provided with external spring, and the cylinder body lower extreme is provided with the cylinder seat, and the bottom is provided with built-in spring in the cylinder body, and built-in spring upper end is provided with the piston, and the cylinder body is arranged in to the piston, and the piston upper end has the piston rod, and the piston rod upwards passes through the cylinder body, and the piston middle part periphery is provided with the piston oil blanket, and the piston oil blanket below is provided with first wear ring, and the piston oil blanket top is provided with the second wear ring.

2. The dual spring low force spring cylinder of claim 1, wherein: the lower end of the built-in spring is lapped with the middle part of the upper end of the cylinder seat, the upper end of the built-in spring is lapped with the lower end of the piston, and the built-in spring is clamped between the piston and the cylinder seat.

3. The dual spring low force spring cylinder of claim 1, wherein: piston oil blanket, first wear-resisting ring and second wear-resisting ring all pass through the draw-in groove with the piston outer wall fixed, piston oil blanket, first wear-resisting ring and second wear-resisting ring all with cylinder body inner wall sliding connection.

4. The dual spring low force spring cylinder of claim 1, wherein: the guide sleeve is fixed on the position, connected with the piston rod, of the inner wall of the cylinder body through the clamping groove, the in-cylinder oil seal fixed with the inner wall of the cylinder body through the clamping groove is arranged above the guide sleeve, and the middle of the upper end of the cylinder body is connected with the dustproof oil seal through the clamping groove.

5. The dual spring low force spring cylinder of claim 4, wherein: the guide sleeve, the in-cylinder oil seal and the dustproof oil seal are all in sliding connection with the piston rod, an end cover is formed at the upper end of the piston rod, and a connector is formed in the middle of the upper end of the end cover.

6. The dual spring low force spring cylinder of claim 5, wherein: the cylinder base is formed at the lower end of the cylinder body, the lower end of the external spring is in lap joint with the periphery of the upper end of the cylinder base, the upper end of the external spring is in lap joint with the end cover, the external spring is clamped and pressed between the cylinder base and the end cover, and the inner wall of the external spring is in sliding connection with the outer wall of the cylinder body.