CN218177598U

CN218177598U - Hydraulic cylinder piston sealing device

Info

Publication number: CN218177598U
Application number: CN202221963727.6U
Authority: CN
Inventors: 闫闵
Original assignee: Qingdao Ankai Power Co ltd
Current assignee: Qingdao Ankai Power Co ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-12-30
Anticipated expiration: 2032-07-28

Abstract

The utility model discloses a hydraulic cylinder piston sealing device, including the hydraulic stem, the both sides rotation at the inside top of hydraulic stem is provided with the pivot, the bottom of pivot is provided with first gear, the inboard top of hydraulic stem is provided with the both sides slip at support ring top and is provided with the buffer beam, the inside top of buffer beam is provided with the spring, the bottom and the support ring fixed connection of spring, the intermediate position department at the inside top of hydraulic stem slides and is provided with the piston rod, the bottom of piston rod is provided with the piston, the intermediate position department at piston top slides and is provided with annular frame. The utility model discloses the sealing washer is equipped with through the endotheca at the annular groove to the device for when the sealing washer reappeared wearing and tearing, can extrude the top of sealing washer through extrusion ring downstream, make the lateral wall expansion of sealing washer, the lateral wall of sealing washer tightly contacts with the inside wall of hydraulic stem, improves the leakproofness of piston.

Description

Hydraulic cylinder piston sealing device

Technical Field

The utility model relates to a sealing device technical field specifically is a pneumatic cylinder piston sealing device.

Background

The hydraulic cylinder is an important power transmission element in a hydraulic transmission system, and the working performance, efficiency and service life of the hydraulic cylinder are directly affected by the sealing performance of the hydraulic cylinder, and even the normal work of the whole machine. The seal between the piston of the hydraulic cylinder and the inner wall of the cylinder barrel is a key seal in the hydraulic cylinder, and directly determines whether the typical fault of leakage in the hydraulic cylinder can occur.

The existing hydraulic rod piston grinding device has the defects that:

1. when the hydraulic cylinder works, the piston continuously rubs on the inner side wall in the hydraulic cylinder, and the hydraulic cylinder can extrude the piston at the working moment, so that the piston can be continuously abraded and deformed, and the piston is not tightly sealed;

2. meanwhile, when the hydraulic cylinder moves and the piston moves to the tail end, the piston can impact the end cover of the hydraulic cylinder, and the end cover seals the top end of the hydraulic cylinder to form a gap.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pneumatic cylinder piston sealing device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a hydraulic cylinder piston sealing device, includes the hydraulic stem, the both sides at the inside top of hydraulic stem are rotated and are provided with the pivot, the bottom of pivot is provided with first gear, the inboard top of hydraulic stem is provided with the both sides slip at support ring top and is provided with the buffer beam, the inside top of buffer beam is provided with the spring, the bottom and the support ring fixed connection of spring, the intermediate position department at the inside top of hydraulic stem slides and is provided with the piston rod, the bottom of piston rod is provided with the piston, the intermediate position department at piston top slides and is provided with annular frame, the inboard and the outside of annular frame are provided with first annular rack and second annular rack respectively, the outside of piston is provided with seal assembly.

Preferably, seal assembly includes annular groove, extrusion ring, threaded rod, second gear, internal thread sleeve pipe and sealing washer, the annular groove is located the outside of piston, the inboard cover of annular groove is equipped with the sealing washer, the both sides at the inside top of annular groove are rotated and are provided with the threaded rod, and are two sets of the bottom of threaded rod is provided with the extrusion ring, the outside threaded connection of threaded rod has the internal thread sleeve pipe, the sheathed tube outside of internal thread is provided with the second gear.

Preferably, the top of the inner side of the sealing ring and the bottom of the inner side of the extrusion ring are obliquely arranged, and the extrusion ring is positioned at the top of the sealing ring.

Preferably, the bottom of the two sides of the internal thread sleeve is provided with a supporting sliding rod, the two sides of the top of the piston are provided with annular sliding grooves, and the supporting sliding rods are matched with the annular sliding grooves.

Preferably, the second annular rack and the second gear are located at the same horizontal position, and the second annular rack and the second gear are meshed with each other.

Preferably, an annular supporting groove is formed in the middle of the top of the interior of the piston, and the annular frame and the annular supporting groove slide mutually.

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

1. the sealing ring is arranged through the inner sleeve of the annular groove, so that when the sealing ring is worn again, the sealing ring can move downwards through the extrusion ring to extrude the top of the sealing ring, the outer side wall of the sealing ring is expanded, the outer side wall of the sealing ring is tightly contacted with the inner side wall of the hydraulic rod, and the sealing property of the piston is improved.

2. When the piston moves, the piston moves to the tail end of the hydraulic rod, the buffer rod can be in contact with the piston at first to push the buffer rod, and the buffer rod stretches the spring, so that the elastic force generated by the spring buffers the impact force, and the impact of the piston on the end cover is reduced.

Drawings

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

fig. 2 is an enlarged schematic view of the structure at a in fig. 1 according to the present invention;

fig. 3 is an enlarged schematic view of the structure at B of fig. 1 according to the present invention.

In the figure: 1. a hydraulic rod; 2. a piston; 3. a seal assembly; 31. an annular groove; 32. an extrusion ring; 33. a threaded rod; 34. a second gear; 35. an internally threaded sleeve; 36. a seal ring; 4. a first annular rack; 5. an annular frame; 6. a rotating shaft; 7. a piston rod; 8. a first gear; 9. a spring; 10. a support ring; 11. a buffer rod; 12. a second annular rack.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides an embodiment: the utility model provides a hydraulic cylinder piston sealing device, including hydraulic stem 1, the both sides at 1 inside top of hydraulic stem are rotated and are provided with pivot 6, the bottom of pivot 6 is provided with first gear 8, the top of 1 inboard of hydraulic stem is provided with the both sides slip of support ring 10 top and is provided with buffer beam 11, the inside top of buffer beam 11 is provided with spring 9, spring 9's bottom and support ring 10 fixed connection, the intermediate position department at 1 inside top of hydraulic stem slides and is provided with piston rod 7, the bottom of piston rod 7 is provided with piston 2, the intermediate position department at 2 tops of piston slides and is provided with annular frame 5, the intermediate position department at 2 inside tops of piston is provided with the annular and supports the groove, annular frame 5 supports the groove reciprocal sliding with the annular, the inboard and the outside of annular frame 5 are provided with first annular rack 4 and second annular rack 12 respectively, the outside of piston 2 is provided with seal assembly 3.

Further, seal assembly 3 includes annular groove 31, extrusion ring 32, threaded rod 33, second gear 34, internal thread sleeve 35 and sealing washer 36, and annular groove 31 is located the outside of piston 2, and the inboard cover of annular groove 31 is equipped with sealing washer 36, and the both sides rotation at the inside top of annular groove 31 is provided with threaded rod 33, and the bottom of two sets of threaded rods 33 is provided with extrusion ring 32, and the outside threaded connection of threaded rod 33 has internal thread sleeve 35, and the outside of internal thread sleeve 35 is provided with second gear 34.

Further, the top of the inner side of the sealing ring 36 and the bottom of the inner side of the squeezing ring 32 are obliquely arranged, and the squeezing ring 32 is positioned at the top of the sealing ring 36.

Further, the bottom of the two sides of the internal thread sleeve 35 is provided with a supporting slide bar, the two sides of the top of the piston 2 are provided with annular slide grooves, and the supporting slide bars are matched with the annular slide grooves.

Further, the second annular rack 12 and the second gear 34 are located at the same horizontal position, and the second annular rack 12 and the second gear 34 are engaged with each other.

The working principle is as follows: when the sealing ring 36 is used for a period of time and is worn, the piston 2 is moved to the top, so that two groups of first gears 8 fall in the annular frame 5 and are meshed with the first annular rack 4, two groups of rotating shafts 6 are rotated to drive the first gears 8, the first gears 8 simultaneously drive the annular frame 5 and the second annular rack 12 to rotate, the second annular rack 12 drives the internal thread sleeve 35 to rotate through the second gear 34, the threaded rod 33 drives the extrusion ring 32 to move downwards under the action of threads, the bevel edge of the extrusion ring 32 is in contact with the bevel edge of the sealing ring 36, the extrusion ring 32 supports and expands the sealing ring 36, and the sealing ring 36 is in closer contact with the side wall of the hydraulic rod 1;

meanwhile, in the moving process of the piston 2, when the piston 2 moves to the top, the buffer rod 11 is firstly contacted with the piston 2, the piston 2 pushes the buffer rod 11 to move upwards, the buffer rod 11 pulls the spring 9 to generate elastic force, the elastic force generated by the spring 9 buffers the impact force of the piston 2, and the impact of the piston 2 on an end cover is reduced.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a hydraulic cylinder piston sealing device, includes hydraulic stem (1), its characterized in that: the utility model discloses a hydraulic pressure pole, including hydraulic stem (1), buffer rod (7), piston rod (2), piston (2), both sides of the inside top of hydraulic stem (1) are rotated and are provided with pivot (6), the bottom of pivot (6) is provided with first gear (8), the top of hydraulic stem (1) inboard is provided with the both sides at support ring (10) top and slides and is provided with buffer beam (11), the inside top of buffer beam (11) is provided with spring (9), the bottom and support ring (10) fixed connection of spring (9), the intermediate position department at the inside top of hydraulic stem (1) slides and is provided with piston rod (7), the bottom of piston rod (7) is provided with piston (2), the intermediate position department at piston (2) top slides and is provided with annular frame (5), the inboard and the outside of annular frame (5) are provided with first annular rack (4) and second annular rack (12) respectively, the outside of piston (2) is provided with seal assembly (3).

2. A hydraulic cylinder piston seal assembly as claimed in claim 1, wherein: seal assembly (3) include annular groove (31), extrusion ring (32), threaded rod (33), second gear (34), internal thread sleeve pipe (35) and sealing washer (36), annular groove (31) are located the outside of piston (2), the inboard cover of annular groove (31) is equipped with sealing washer (36), the both sides rotation at the inside top of annular groove (31) is provided with threaded rod (33), and is two sets of the bottom of threaded rod (33) is provided with extrusion ring (32), the outside threaded connection of threaded rod (33) has internal thread sleeve pipe (35), the outside of internal thread sleeve pipe (35) is provided with second gear (34).

3. A hydraulic cylinder piston seal assembly as claimed in claim 2 in which: the top of the inner side of the sealing ring (36) and the bottom of the inner side of the extrusion ring (32) are obliquely arranged, and the extrusion ring (32) is located at the top of the sealing ring (36).

4. A hydraulic cylinder piston seal assembly as claimed in claim 2, wherein: the bottom of internal thread sleeve pipe (35) both sides is provided with the support slide bar, the both sides at piston (2) top are provided with annular spout, and support slide bar and the mutual adaptation of annular spout.

5. A hydraulic cylinder piston seal assembly as claimed in claim 1, wherein: the second annular rack (12) and the second gear (34) are located at the same horizontal position, and the second annular rack (12) and the second gear (34) are meshed with each other.

6. A hydraulic cylinder piston seal assembly as claimed in claim 1 in which: an annular supporting groove is formed in the middle of the top of the interior of the piston (2), and the annular frame (5) and the annular supporting groove slide mutually.