Leak-proof device for hydraulic oil cylinder

Abstract

The utility model discloses a leakproof device for a hydraulic oil cylinder, which relates to the technical field of hydraulic oil cylinders, and comprises a sealing component, a dust removal component is arranged at the upper end of the sealing component, a cylinder body is arranged at the lower end of the sealing component, a rod body is arranged in the cylinder body, and a sealing component is arranged in the rod body. According to the scheme, the problems that when a rod body of an existing hydraulic oil cylinder is retracted, oil leakage of the cylinder body is easily caused by dust contamination, dust is easily accumulated on a dustproof cotton plate after the rod body is cleaned through the dustproof cotton plate, the dust is easily removed, and the dust removal efficiency is improved are solved. The problems that a rod body and a pushing object need to be disassembled during disassembly and cleaning, then a dustproof cotton plate is taken down from the direction of the rod body for replacement, time and labor are wasted, the replacement flexibility is poor, the surface of the rod body is prone to being rubbed and damaged when the dustproof cotton plate is taken down, and the later use sealing performance is poor are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic cylinder technical field, concretely is a kind of anti-leakage device for hydraulic cylinder. BACKGROUND

[0002] Hydraulic cylinder is the hydraulic energy into mechanical energy, do linear reciprocating motion hydraulic actuator, by back and forth to push oil, so its sealing performance is very important;

[0003] For example, the Chinese authorized patent (a kind of anti-leakage device for hydraulic cylinder) with the announcement number CN218151754U): including hydraulic cylinder main body, the hydraulic cylinder main body is equipped with lever, the hydraulic cylinder main body right side is fixedly connected with first oil seal, the hydraulic cylinder main body right side is fixedly connected with sealing shell, the sealing shell is equipped with sealing block, the sealing block right end outside is equipped with fixed cover, in the utility model, by setting up the hydraulic cylinder main body, sealing shell, sealing block, first oil seal, sealing sleeve and second oil seal, the lever outside can be conveniently sealed multiple, make sealing effect better, prevent oil leakage, make hydraulic cylinder use more stable, by setting up fixed cover and dustproof cotton board, can prevent the dust from entering sealing shell when lever is retracted in hydraulic cylinder main body, prevent dust from causing damage to first oil seal, sealing sleeve and second oil seal, make cylinder service life longer.

[0004] However, the rod body of existing hydraulic cylinder is easy to cause cylinder leakage due to dust contamination when being retracted, after cleaning by dustproof cotton board, dust is easy to accumulate on the dustproof cotton board, and the rod body and pushing body need to be disassembled for cleaning, then the dustproof cotton board is taken off from the rod body direction for replacement, which is time-consuming and laborious, leads to poor replacement flexibility, and the rod body surface is also easy to be rubbed and damaged when being taken off, leading to poor sealing performance in later use;Therefore, it does not meet the existing demand, and for this, we propose an anti-leakage device for hydraulic cylinder. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing an anti-leakage device for hydraulic cylinder to solve the problems that the rod body of existing hydraulic cylinder is easy to cause cylinder leakage due to dust contamination when being retracted, dust is easy to accumulate on the dustproof cotton board after cleaning by dustproof cotton board, the rod body and pushing body need to be disassembled for cleaning, then the dustproof cotton board is taken off from the rod body direction for replacement, which is time-consuming and laborious, leads to poor replacement flexibility, and the rod body surface is also easy to be rubbed and damaged when being taken off, leading to poor sealing performance in later use.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A kind of anti-leakage device for hydraulic oil cylinder, comprising: sealing assembly, the upper end of the sealing assembly is provided with dust removal assembly, the lower end of the sealing assembly is provided with cylinder body, the inside of the cylinder body is provided with stem, the dust removal assembly includes first fixed sleeve and second fixed sleeve, the lower end of the first fixed sleeve and second fixed sleeve is provided with support base, dustproof cotton board is arranged between the upper end of the support base and the top end of the first fixed sleeve and second fixed sleeve.

[0007] Preferably, the center of the first fixed sleeve and the second fixed sleeve after merging forms a moving groove, and the stem moves up and down along the moving groove.

[0008] Preferably, the first fixed sleeve and the second fixed sleeve are provided with connecting plates at both ends, and the connecting plates are provided with single-head fasteners on one side.

[0009] Preferably, the sealing assembly includes a sealing seat, an outer thread is arranged on the top outer wall of the sealing seat, and the dust removal assembly is threadedly connected with the sealing seat through the outer thread.

[0010] Preferably, the center of the sealing seat is provided with an up-and-down-through stem groove, and the stem moves up and down along the stem groove, the inner wall of the stem groove is provided with a first limiting groove, the lower side of the first limiting groove is provided with a second limiting groove, the inside of the first limiting groove is provided with a first sealing ring, the inside of the second limiting groove is provided with a second sealing ring, and the first sealing ring and the second sealing ring both surround the stem and are in close contact with the stem.

[0011] Preferably, a fixed outer ring is welded on the bottom outer surface of the sealing seat, and a fixed seat is welded on the outer wall of the cylinder body, and the fixed outer ring is threadedly fixed with the fixed seat through a threaded fastener.

[0012] Preferably, a first embedded groove is arranged on the top surface of the cylinder body, a second embedded groove is arranged on the outside of the first embedded groove, and a sealing strip is embedded in the inside of the first embedded groove and the second embedded groove.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The utility model discloses a sealing assembly and dust removal assembly are set up, through the sealing structure of cylinder body self, sealing strip, the first sealing ring and second sealing ring of sealing assembly, dustproof cotton board play multiple sealing effect, thereby improve the anti -leakage effect, and through the mode of dismounting from both sides of first fixed sleeve and second fixed sleeve, realize quick replacement dustproof cotton board, do not need to dismount the rod body and push the object, improve the convenience of replacement, also can not rub and damage the rod body surface when dismounting, improve the protectivity and the leakproofness of secondary use again, solve the rod body of the existing hydraulic oil cylinder when retraction, easy because of the dust that sticks to cause the cylinder body to leak, after cleaning through dustproof cotton board, dustproof cotton board is easy to accumulate dust, need to dismount the rod body and push the object when dismounting and clean, then take down dustproof cotton board from the rod body direction and replace, time -consuming and labor -intensive, lead to the poor replacement flexibility, and also easy to rub and damage the rod body surface when taking down, lead to the problem of poor sealing performance in the later period.

[0015] Through setting the external thread on the top end outer wall of the sealing seat, the dust removal assembly is connected with the sealing seat through the external thread, the connection sealing performance of the dust removal assembly and the sealing assembly is improved, the top end position of the sealing seat is avoided from being polluted by dust to cause leakage, the sealing performance of the sealing assembly is improved, and the anti-leakage effect of the hydraulic oil cylinder is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic view of the utility model;

[0017] Figure 2 It is the top end surface structure schematic view of the utility model's cylinder body;

[0018] Figure 3 It is the split structure schematic view of the utility model's sealing assembly and dust removal assembly;

[0019] Figure 4 It is the cross section structure schematic view of the utility model's sealing seat;

[0020] In the drawing: 1, sealing assembly;2, dust removal assembly;3, rod body;4, cylinder body;5, first embedded groove;6, second embedded groove;7, sealing strip;8, fixed seat;9, first fixed sleeve;10, second fixed sleeve;11, connecting plate;12, single head fastener;13, moving groove;14, support base;15, dustproof cotton board;16, sealing seat;17, external thread;18, fixed outer ring;19, threaded fastener;20, rod body groove;21, first limit groove;22, second limit groove;23, first sealing ring;24, second sealing ring. DETAILED DESCRIPTION

[0021] Clearly, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Please refer to Figures 1-4 The utility model provides an embodiment: a kind of anti-leakage device for hydraulic cylinder, comprising: sealing assembly 1, the upper end of sealing assembly 1 is provided with dust removal component 2, the lower end of sealing assembly 1 is provided with cylinder body 4, the inside of cylinder body 4 is provided with stem 3, dust removal component 2 includes first fixed sleeve 9 and second fixed sleeve 10, the lower end of first fixed sleeve 9 and second fixed sleeve 10 is provided with support base 14, dustproof cotton board 15 is provided between the top of first fixed sleeve 9 and second fixed sleeve 10 and the upper end of support base 14, sealing seat 16 is included in sealing assembly 1, the top outer wall of sealing seat 16 is provided with external thread 17, and dust removal component 2 is connected with sealing seat 16 by external thread 17, stem slot 20 that passes up and down is provided at the center of sealing seat 16, and stem 3 moves up and down along stem slot 20, the inner wall of stem slot 20 is provided with first limiting slot 21, second limiting slot 22 is provided below first limiting slot 21, first sealing ring 23 is provided in the inside of first limiting slot 21, second sealing ring 24 is provided in the inside of second limiting slot 22, and first sealing ring 23 and second sealing ring 24 are all around stem 3, and are in close contact with stem 3, the top surface of cylinder body 4 is provided with first embedded groove 5, the outside of first embedded groove 5 is provided with second embedded groove 6, and sealing strip 7 is embedded in the inside of first embedded groove 5 and second embedded groove 6.

[0023] Through the sealing structure of cylinder body 4 itself, sealing strip 7, the first sealing ring 23 and the second sealing ring 24 of sealing assembly 1, dustproof cotton board 15 plays multiple sealing effect, thereby improve the anti-leakage effect, and through the mode of disassembling from both sides of first fixed sleeve 9 and second fixed sleeve 10, realize quick replacement of dustproof cotton board 15, without disassembling stem 3 and pusher, improve the convenience of replacement, also will not rub and damage the surface of stem 3 when disassembling, improve the protection and the sealing property of reusing.

[0024] Please refer to Figure 1 , 3 The center of first fixed sleeve 9 and second fixed sleeve 10 after merging forms moving slot 13, and stem 3 moves up and down along moving slot 13, both ends of first fixed sleeve 9 and second fixed sleeve 10 are provided with connecting plate 11, one side of connecting plate 11 is provided with single-head fastener 12, to facilitate the disassembly and replacement of dustproof cotton board 15 of first fixed sleeve 9 and second fixed sleeve 10.

[0025] Please refer to Figure 1 , 2, 3, the bottom end outer surface of the sealing seat 16 is welded with the fixed outer ring 18, the outer wall of the cylinder body 4 is welded with the fixed seat 8, and the fixed outer ring 18 is screwed with the fixed seat 8 through the threaded fastener 19, so that the sealing assembly 1 is fixed with the cylinder body 4, and the leakage prevention effect is improved through the sealing assembly 1.

[0026] Working principle: when in use, the sealing assembly 1 is sleeved outside the rod body 3 through the rod body groove 20, and is screwed with the fixed seat 8 through the threaded fastener 19 outside the fixed outer ring 18, so that the sealing assembly 1 is fixed with the cylinder body 4, the sealing strip 7 is embedded in the first embedded groove 5 and the second embedded groove 6, the sealing property of the sealing assembly 1 and the cylinder body 4 is improved, and the leakage prevention effect is improved.

[0027] The first fixed sleeve 9 and the second fixed sleeve 10 are sleeved outside the rod body 3 from both sides and are in contact with the rod body 3 through the dustproof cotton board 15, the first fixed sleeve 9 and the second fixed sleeve 10 are fixed by relying on the single-head fastener 12 outside the connecting plate 11, the dust removal assembly 2 is screwed with the sealing seat 16 through the external thread 17, the connection sealing property of the dust removal assembly 2 and the sealing assembly 1 is improved, so that the sealing property of the sealing assembly 1 is improved, and dust pollution is avoided.

[0028] When the rod body 3 moves, the first sealing ring 23 and the second sealing ring 24 of the sealing assembly 1 play a two-stage sealing protection, so that the sealing property is improved, and when the rod body 3 moves back, the dust on the surface is cleaned by the dustproof cotton board 15, so that the dust is prevented from entering the inside of the sealing seat 16 and the cylinder body 4, and the sealing property is improved again, the dustproof cotton board 15 plays a multiple sealing effect through the sealing structure of the cylinder body 4, the sealing strip 7, the first sealing ring 23 and the second sealing ring 24 of the sealing assembly 1 and the dustproof cotton board 15, so that the leakage prevention effect is improved, and the dustproof cotton board 15 is quickly replaced through the dismounting mode from both sides of the first fixed sleeve 9 and the second fixed sleeve 10, the rod body 3 and the pushing body do not need to be dismounted, the convenience of replacement is improved, the surface of the rod body 3 is not rubbed and damaged during dismounting, the protection property and the sealing property of re-use are improved.

[0029] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point, the embodiments should be regarded as exemplary and non-restrictive, the scope of the utility model is defined by the appended claims instead of the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure mark in the claims should not be regarded as limiting the involved claims.

Claims

1. A leakage prevention device for hydraulic cylinders comprising a sealing assembly (1), characterized in that: The upper end of the sealing assembly (1) is provided with a dust removal assembly (2), the lower end of the sealing assembly (1) is provided with a cylinder body (4), the inside of the cylinder body (4) is provided with a rod body (3), the dust removal assembly (2) comprises a first fixed sleeve (9) and a second fixed sleeve (10), the lower end of the first fixed sleeve (9) and the second fixed sleeve (10) is provided with a supporting base (14), and the upper end of the supporting base (14) is provided between the top end of the first fixed sleeve (9) and the second fixed sleeve (10).

2. A leakage-proof device for a hydraulic cylinder according to claim 1, characterized in that: The center of the first fixed sleeve (9) and the second fixed sleeve (10) after merging forms a moving groove (13), and the rod body (3) moves up and down along the moving groove (13).

3. The leakage-proof device for hydraulic cylinder according to claim 1, characterized in that: Both ends of the first fixed sleeve (9) and the second fixed sleeve (10) are provided with a connecting plate (11), one side of the connecting plate (11) is provided with a single-head fastener (12).

4. The leakage-proof device for hydraulic cylinder according to claim 1, characterized in that: The sealing assembly (1) comprises a sealing seat (16), the top outer wall of the sealing seat (16) is provided with an external thread (17), and the dust removal assembly (2) is screwed with the sealing seat (16) through the external thread (17).

5. A leakage-proof device for a hydraulic cylinder according to claim 4, characterized in that: The center of the sealing seat (16) is provided with an up-and-down-through rod body groove (20), and the rod body (3) moves up and down along the rod body groove (20), the inner wall of the rod body groove (20) is provided with a first limiting groove (21), the lower side of the first limiting groove (21) is provided with a second limiting groove (22), the inside of the first limiting groove (21) is provided with a first sealing ring (23), the inside of the second limiting groove (22) is provided with a second sealing ring (24), and the first sealing ring (23) and the second sealing ring (24) are both around the rod body (3) and in close contact with the rod body (3).

6. A leakage-proof device for a hydraulic cylinder according to claim 4, characterized in that: The bottom outer surface of the sealing seat (16) is welded with a fixed outer ring (18), the outer wall of the cylinder body (4) is welded with a fixed seat (8), and the fixed outer ring (18) is screwed with the fixed seat (8) through a threaded fastener (19).

7. The leakage-proof device for hydraulic cylinder according to claim 1, characterized in that: The top surface of the cylinder body (4) is provided with a first embedded groove (5), the outside of the first embedded groove (5) is provided with a second embedded groove (6), and the inside of the first embedded groove (5) and the second embedded groove (6) is embedded with a sealing strip (7).

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