CN213270550U - Buffer device for hydraulic cylinder - Google Patents

Abstract

The utility model discloses a buffer device for a hydraulic cylinder, which comprises a cylinder body, a piston rod, a piston, a cylinder cover, a cylinder bottom, a buffer structure for buffering the piston and a sealing structure for sealing the inside of the cylinder body, one side of the top end of the cylinder body is provided with an oil hole, the piston rod is arranged in the cylinder body, the top end of the piston rod penetrates through the cylinder body, and one end of the piston penetrating through the cylinder body is provided with an ear ring which is fixed at the top end of the piston rod through a locking nut, the piston is arranged at the bottom of one end of the piston rod positioned in the cylinder body, and the piston is provided with a plurality of clamping grooves, the cylinder cover is arranged in the cylinder body and is sleeved at one end of the piston rod different from the piston, the cylinder bottom is installed in the one end bottom that the cylinder body is different from the cylinder cap, buffer structure installs in the piston and is located one side of cylinder body and the bottom of cylinder cap, seal structure installs in the inside of cylinder cap and on the draw-in groove. The utility model discloses it is sealed effectual, stronger to the cushioning effect of piston.

Description

Buffer device for hydraulic cylinder

Technical Field

The utility model relates to a buffer technical field specifically is a buffer for hydraulic cylinder.

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion, has simple structure and reliable operation, can avoid a speed reducer when the hydraulic cylinder is used for realizing reciprocating motion, has no transmission clearance and moves stably, thereby being widely applied to hydraulic systems of various machines.

However, the existing hydraulic cylinder has a low buffering effect on the piston, the piston reciprocates in the cylinder body to generate impact force on two ends of the cylinder body, and the cylinder body is easily damaged, so that the normal use of the hydraulic cylinder is affected, and in the long-time use process of the hydraulic cylinder, due to the fact that the piston rod reciprocates on two sides inside and outside the cylinder body, dust in the air outside the cylinder body easily enters the cylinder body, the piston rod is abraded, and power oil in the cylinder body is polluted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a buffer for hydraulic cylinder to solve among the above-mentioned background art and need guarantee the bearing capacity of stock at the use of stock, need carry out the bearing capacity to the stock before the use and carry out pressure test, current pressure test only utilizes the test and calculates the result, but the data that reachs when using are not accurate enough, can not reachd comparatively actual structure simultaneously, lead to the data that detect not actual enough.

In order to achieve the above object, the utility model provides a following technical scheme: a buffer device for a hydraulic cylinder comprises a cylinder body, a piston rod, a piston, a cylinder cover, a cylinder bottom, a buffer structure for buffering the piston and a sealing structure for sealing the inside of the cylinder body, one side of the top end of the cylinder body is provided with an oil hole, the piston rod is arranged in the cylinder body, the top end of the piston rod penetrates through the cylinder body, and one end of the piston penetrating through the cylinder body is provided with an ear ring which is fixed at the top end of the piston rod through a locking nut, the piston is arranged at the bottom of one end of the piston rod positioned in the cylinder body, and the piston is provided with a plurality of clamping grooves, the cylinder cover is arranged in the cylinder body and is sleeved at one end of the piston rod different from the piston, the cylinder bottom is installed in the one end bottom that the cylinder body is different from the cylinder cap, buffer structure installs in the piston and is located one side of cylinder body and the bottom of cylinder cap, seal structure installs in the inside of cylinder cap and on the draw-in groove.

Preferably, buffer structure includes first blotter, second blotter and buffering plunger, first blotter is installed in the bottom of cylinder cap, the second blotter is installed in the bottom of cylinder body, buffering plunger is installed in the bottom of piston and corresponding with the second blotter, and the effectual impact force that produces the piston cushions cylinder cap and cylinder end, reduces the damage degree of cylinder cap and cylinder end.

Preferably, the sealing structure comprises a piston rod sealing ring and a piston sealing ring, the piston rod sealing ring is sleeved on the top end of the piston rod and located on the inner side of the cylinder cover, the piston sealing ring is installed in the clamping groove, the sealing performance inside the cylinder body is improved, and the energy conversion rate inside the cylinder body is improved.

Preferably, the inner side of the earring is provided with an earring lining ring, so that the earring is effectively protected, and the abrasion degree of the earring is reduced.

Preferably, the dustproof ring is installed at the inside top of the cylinder body, and is sleeved on the piston rod, and is located between the piston rod sealing ring and the top of the cylinder body, so that dust outside the cylinder body can be effectively prevented from entering the cylinder body.

Preferably, the piston is provided with the anti-fouling ring and the anti-wear ring in the clamping grooves on the two sides of the piston sealing ring respectively, so that the stain on the bottom of the cylinder is effectively prevented from entering the cylinder body, the anti-wear ring protects the piston, and the piston is prevented from being worn.

The utility model provides a buffer for hydraulic cylinder possesses following beneficial effect:

(1) the utility model discloses a be provided with buffer structure, the piston is reciprocating motion's in-process in the cylinder body, when the position of cylinder cap is beaten to the piston, cushion the piston through first blotter, reduce the power of piston, thereby reduce the impact force to the cylinder cap, make to the cylinder bottom when the piston motion, the impact force of the flexible effect through buffering plunger reduction piston, and when buffering plunger and second blotter clash the contact, the second blotter cushions the impact force that buffering plunger transmitted, make the impact force greatly reduced to the cylinder bottom of piston, effectually protect to the cylinder bottom.

(2) The utility model discloses a be provided with dust ring, piston rod sealing washer and piston seal circle, can avoid the dust to get into the inside damage that causes the piston rod of cylinder body with the dust separation of cylinder body outside air in the outside of cylinder body through the dust ring, can effectually strengthen the inside leakproofness of cylinder body through piston rod sealing washer and piston seal circle, avoid the inside motor oil of cylinder body to reveal.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is a schematic view of the position of the slot of the present invention;

fig. 4 is an enlarged schematic view of a portion a in fig. 2 according to the present invention.

In the figure: 1. a cylinder body; 2. a piston rod; 3. a piston; 4. a cylinder cover; 5. a cylinder bottom; 6. an oil hole; 7. locking the nut; 8. a card slot; 9. a first cushion pad; 10. a second cushion pad; 11. a buffer plunger; 12. a piston rod seal ring; 13. a piston seal ring; 14. an ear ring; 15. the earring is lined with a ring; 16. a dust ring; 17. an antifouling ring; 18. an antiwear ring.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1-4, the utility model provides a technical scheme: a buffer device for a hydraulic cylinder comprises a cylinder body 1, a piston rod 2, a piston 3, a cylinder cover 4, a cylinder bottom 5, a buffer structure for buffering the piston 3 and a sealing structure for sealing the inside of the cylinder body 1, wherein an oil hole 6 is formed in one side of the top end of the cylinder body 1, the piston rod 2 is installed inside the cylinder body 1, the top end of the piston rod 2 penetrates through the cylinder body 1, an ear ring 14 is installed on one end of the piston 3, which penetrates through the cylinder body 1, the ear ring 14 is fixed on the top end of the piston rod 2 through a locking nut 7, the piston 3 is installed at the bottom of one end of the piston rod 2, which is positioned inside the cylinder body 1, a plurality of clamping grooves 8 are formed in the piston 3, the cylinder cover 4 is installed inside the cylinder body 1 and is sleeved at one end of the piston rod 2, which is different from the piston 3, the cylinder bottom 5 is installed at the bottom of one end of the, the sealing structure is arranged in the cylinder cover 4 and on the clamping groove 8.

Buffer structure includes first blotter 9, second blotter 10 and buffering plunger 11, first blotter 9 is installed in the bottom of cylinder cap 4, second blotter 10 is installed in the bottom of cylinder body 1, buffering plunger 11 is installed in the bottom of piston 3 and corresponding with second blotter 10, and the effectual impact force that produces piston 3 cushions cylinder cap 4 and cylinder body 1, reduces the damage degree of cylinder cap 4 and cylinder bottom 5.

The sealing structure comprises a piston rod sealing ring 12 and a piston sealing ring 13, the piston rod sealing ring 12 is sleeved on the top end of the piston rod 2 and located on the inner side of the cylinder cover 4, the piston sealing ring 13 is installed in the clamping groove 8, the sealing performance inside the cylinder body 1 is effectively improved, and the energy conversion rate is improved.

An earring lining ring 15 is arranged on the inner side of the earring 14, so that the earring 14 is effectively protected, and the abrasion of the earring 14 is reduced.

The inside top department of cylinder body 1 installs dust ring 16, dust ring 16 cup joints on piston rod 2, just dust ring 16 is located between piston rod sealing ring 12 and the 1 top of cylinder body, and the effectual dust to in the air carries out the separation, avoids the dust in the air to enter into inside cylinder body 1, produces the damage to piston rod 2.

The piston 3 is located and installs antifouling ring 17 and ring 18 that wear-resistants in the draw-in groove 8 of piston seal ring 13's both sides respectively, and the effectual spot that prevents cylinder bottom 5 department gets into inside the cylinder body 1 to and protect piston 3, avoid piston 3 wearing and tearing.

The working principle is that an operator installs an oil pipe at the oil hole 6, oil is conveyed to the inside of the cylinder body 1 through the oil hole 6 and the oil in the cylinder body 1 is output, when the oil is conveyed in the cylinder body 1, the piston 3 moves towards the cylinder bottom 5, the impact force of the piston 3 on the cylinder bottom 5 is reduced through the telescopic action of the buffer plunger 11 at the bottom of the piston 3, meanwhile, when the buffer plunger 11 is in contact with the second buffer pad 10, the second buffer pad 10 buffers the impact force transmitted by the buffer plunger 11, the impact force of the piston 3 on the cylinder bottom 5 is rapidly reduced, the cylinder bottom 5 is effectively protected, the piston 3 is protected by the anti-wear ring 18 in the moving process, the piston 3 is prevented from being worn, the piston sealing ring 13 blocks the power oil in the cylinder body 1, the oil is prevented from leaking to the cylinder bottom 5 from the piston 3, the anti-fouling ring 17 can prevent the stains at the cylinder bottom 5 from entering the inside of the, carry away the messenger when oil pipe with the oil in the cylinder body 1, piston 3 moves to 1 top of cylinder body, move 4 departments of cylinder cap when piston 3, first blotter 9 cushions the impact force of piston 3, reduce the impact of piston 3 to cylinder cap 4, piston rod 2 moves under the effect of piston 3, the dust ring 16 on 4 tops of cylinder cap is effectual prevents that the dust in the 1 outside air of cylinder body from entering into inside the cylinder body 1, piston rod sealing ring 12 and 13 interact of piston sealing ring, strengthen the inside sealed degree of cylinder body 1, the effectual energy conversion rate that improves.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a buffer for hydraulic cylinder, includes cylinder body (1), piston rod (2), piston (3), cylinder cap (4), cylinder bottom (5), is used for carrying out the buffer structure who cushions piston (3) and is used for carrying out sealed seal structure, its characterized in that to cylinder body (1) inside: the oil hole (6) is formed in one side of the top end of the cylinder body (1), the piston rod (2) is installed inside the cylinder body (1), the top end of the piston rod (2) penetrates through the cylinder body (1), the piston (3) penetrates through one end of the cylinder body (1) and is provided with the lug ring (14), the lug ring (14) is fixed to the top end of the piston rod (2) through the locking nut (7), the piston (3) is installed at the bottom of one end, located inside the cylinder body (1), of the piston rod (2), the piston (3) is provided with the clamping grooves (8), the cylinder cover (4) is installed inside the cylinder body (1) and is sleeved at one end, different from the piston (3), of the cylinder bottom (1), different from the bottom of the cylinder cover (4), the buffer structure is installed at one side, located on the cylinder body (1), of the bottom of the cylinder cover (4), of the piston (3), the sealing structure is arranged in the cylinder cover (4) and on the clamping groove (8).

2. The shock absorber for the hydraulic cylinder according to claim 1, wherein: the buffer structure comprises a first buffer cushion (9), a second buffer cushion (10) and a buffer plunger (11), wherein the first buffer cushion (9) is installed at the bottom of the cylinder cover (4), the second buffer cushion (10) is installed at the bottom of the cylinder body (1), and the buffer plunger (11) is installed at the bottom of the piston (3) and corresponds to the second buffer cushion (10).

3. The shock absorber for the hydraulic cylinder according to claim 1, wherein: the sealing structure comprises a piston rod sealing ring (12) and a piston sealing ring (13), the piston rod sealing ring (12) is sleeved on the top end of the piston rod (2) and located on the inner side of the cylinder cover (4), and the piston sealing ring (13) is installed in the clamping groove (8).

4. The shock absorber for the hydraulic cylinder according to claim 1, wherein: an earring lining ring (15) is arranged on the inner side of the earring (14).

5. The shock absorber for the hydraulic cylinder according to claim 1, wherein: the inside top department of cylinder body (1) installs dust ring (16), dust ring (16) cup joint on piston rod (2), just dust ring (16) are located between piston rod sealing washer (12) and cylinder body (1) top.

6. The shock absorber for the hydraulic cylinder according to claim 1, wherein: and an antifouling ring (17) and an antiwear ring (18) are respectively arranged in clamping grooves (8) on two sides of the piston sealing ring (13) on the piston (3).

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