Hydraulic buffer with good buffering effect

Abstract

The utility model discloses a hydraulic buffer with good buffering effect, which comprises a cylinder body, a sleeve fixed in the cylinder body and a piston rod arranged in the sleeve in a sliding mode, a spring assembly is arranged in the sleeve and abuts against the piston rod, the spring assembly comprises an air bag casing pipe and a spring, and the air bag casing pipe is connected with the piston rod in a sliding mode. A plurality of corrugated parts are arranged on the outer wall and the inner wall of the air bag sleeve from top to bottom, a cavity for containing a spring is formed in the air bag sleeve, and cavities are formed in the corrugated parts and communicated with the cavity. The spring is effectively protected through the cavity, then hydraulic oil is prevented from corroding the spring, after the corrugated part is compressed, gas in the cavity is extruded and compressed, the corrugated part achieves the elastic effect, the buffering capacity of the product is improved in cooperation with the elastic force of the spring, and the product has the advantages that the protection function is achieved, and the buffering performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to buffer technology field especially relates to a hydraulic buffer with good buffering effect. BACKGROUND

[0002] The hydraulic buffer is composed of an axle as a pressure bearing part, hydraulic oil as a buffer medium, a spring as a reset part and an outer tube as a shell. The buffer and reset process of the hydraulic buffer is based on the principle of multiple orifice throttling and spring reset, which is novel in design, compact and reasonable in structure, good in sealing and reliable in operation.

[0003] The existing hydraulic buffer has some air left in the cylinder after adding hydraulic oil and sealing during the production process. Acidic substances and precipitates will be produced after the oxidation of the hydraulic oil, which will erode the metal spring and cause the spring to deform. Therefore, the applicant has made beneficial design and found a method to solve the above problems. The technical scheme to be introduced below is generated in this background. SUMMARY

[0004] The utility model discloses to overcome the shortcoming of the prior art, and provide a product with protection function and improved buffering performance.

[0005] A hydraulic buffer with good buffering effect, comprising a cylinder body, a sleeve fixed in the cylinder body, and a piston rod slidingly arranged in the sleeve, wherein the sleeve is provided with a spring assembly abutting against the piston rod, the spring assembly comprises an air bag sleeve and a spring, the outer wall and the inner wall of the air bag sleeve are provided with a plurality of wrinkle parts from top to bottom, the air bag sleeve is provided with a spring-containing cavity, and the wrinkle parts are provided with cavities and are communicated with the cavity.

[0006] Preferably, the cylinder body is provided with a sealing washer, the piston rod is provided with a rod portion, and the rod portion penetrates through the sealing washer and the end face of the cylinder body, and a sealing ring is arranged between the rod portion and the cylinder body.

[0007] Preferably, the rod portion is provided with a bump cap.

[0008] Preferably, the sleeve is provided with a threaded portion, the threaded portion is threadedly connected to the inner wall of the cylinder body and abuts against the sealing washer, the threaded portion is uniformly provided with a plurality of oil leakage holes with a circular dot as the center, and the inner wall of the sleeve is uniformly provided with a plurality of oil discharge holes and oil return holes with a circular dot as the center.

[0009] Preferably, a space for the flow of hydraulic oil is arranged between the sleeve and the cylinder body and between the wrinkle parts and the sleeve.

[0010] Preferably, a blocking cover is provided at the inlet of the cylinder body, and the blocking cover is provided with a limiting portion and a convex column. The limiting portion is sleeved in the airbag sleeve, and the convex column is inserted between the sleeve and the airbag sleeve. Beneficial effects

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] (1) The utility model effectively protects the spring through the cavity, thereby isolating the spring from being corroded by hydraulic oil. Moreover, since the space in the cavity is sealed, the possibility of oxidation corrosion is greatly reduced, thereby increasing the service life of the spring and giving the product the advantage of protective function.

[0013] (2) The utility model has a plurality of wrinkles and a matching cavity. When the wrinkles are compressed, the gas in the cavity is squeezed and compressed, so that the wrinkles can realize elastic action and cooperate with the elastic force of the spring, so that the product has the advantage of improved cushioning performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the side cross-sectional structure of a hydraulic buffer with good buffering effect according to the utility model;

[0015] Figure 2 For this utility model Figure 1 A partial enlarged view of a hydraulic buffer with good buffering effect;

[0016] Figure 3 For this utility model Figure 1 A partial enlarged view B of a hydraulic buffer with good buffering effect;

[0017] The corresponding relationship between the illustration labels and component names in the figure is as follows:

[0018] Figure numerals: 1. cylinder body; 2. sleeve; 3. piston rod; 4. spring assembly; 5. sealing gasket; 6. sealing ring; 7. plugging cover; 21. threaded portion; 22. oil drain hole; 23. oil drain hole; 24. oil return hole; 31. rod portion; 32. anti-collision cap; 41. airbag sleeve; 42. spring; 411. wrinkled portion; 412. cavity; 413. chamber; 71. limiting portion; 72. boss. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In the description of the utility model, it needs to be understood that the orientation or position relation indicated by the terms such as ''up'', ''down'', ''left'', ''right'' in the specification is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0021] In the embodiments of the utility model, ''and / or'' is only a description of the association relation of the associated objects, which indicates that there can be three kinds of relations, for example, A and / or B can indicate that there are three cases of A alone, A and B together and B alone.In addition, the character '' / '' in this paper generally indicates that the front and rear associated objects are in an ''or'' relation.

[0022] Reference example Figures 1 to 3 A hydraulic buffer with good buffering effect, comprising a cylinder body 1, a sleeve 2 fixed in the cylinder body 1, and a piston rod 3 slidingly arranged in the sleeve 2, a spring 42 assembly 4 is arranged in the sleeve 2 and abuts against the piston rod 3, the spring 42 assembly 4 comprises a gas bag sleeve 41 and a spring 42, the outer wall and the inner wall of the gas bag sleeve 41 are provided with a plurality of wrinkle parts 411 from top to bottom, the gas bag sleeve 41 is provided with a cavity 412 accommodating the spring 42, the wrinkle part 411 is provided with a cavity 413 in communication with the cavity 412, the spring 42 is effectively protected through the cavity 412, thereby isolating the hydraulic oil from corroding the spring 42, and since the space in the cavity 412 is sealed, the possibility of oxidation corrosion is greatly reduced, thereby improving the service life of the spring 42; through the plurality of wrinkle parts 411 and the matching cavity 413, when the wrinkle part 411 is compressed, the gas in the cavity 412 is extruded and compressed, so that the wrinkle part 411 realizes elastic action, and the spring force of the spring 42 is matched to increase the buffering capacity of the product.

[0023] It is worth mentioning that the cylinder body 1 is provided with a sealing gasket 5, the piston rod 3 is provided with a rod portion 31 and penetrates through the sealing gasket 5 and the end face of the cylinder body 1, and a sealing ring 6 is arranged between the rod portion 31 and the cylinder body 1, the sealing gasket 5 prevents the hydraulic oil in the cylinder body 1 from leaking out, and the sealing ring 6 has the same effect as the sealing gasket 5;

[0024] It is worth mentioning that the rod portion 31 is provided with a bump cap 32, the bump cap 32 effectively absorbs the impact energy generated when the moving part stops or changes direction by increasing the collision contact area with the object.

[0025] It is worth mentioning that the sleeve 2 is provided with a threaded part 21 which is screwed to the inner wall of the cylinder body 1 and abuts against the sealing washer 5, the threaded part 21 is uniformly distributed with a plurality of oil leakage holes 22 with a circular dot as the center, the inner wall of the sleeve 2 is uniformly distributed with a plurality of oil discharge holes 23 and oil return holes 24 with a circular dot as the center, when the anti-collision cap 32 is impacted, the impact force drives the piston rod 3 to move towards the limiting part 71, the piston rod 3 extrudes the hydraulic oil in the sleeve 2 to discharge from the oil discharge holes 23 to the space between the sleeve 2 and the cylinder body 1, the hydraulic oil enters the sleeve 2 between the piston rod 3 and the sealing washer 5 through the oil return holes 24, and the hydraulic oil also plays a buffering role in the discharging process, the spring 42 assembly 4 further absorbs the impact energy, thereby improving the buffering performance, when the impact force is buffered, the spring 42 assembly 4 releases the elastic force to the piston rod 3 to drive it to reset, the hydraulic oil returns to the sleeve 2 through the oil return holes 24 and the oil leakage holes 22, and a reciprocating process is formed.

[0026] It is worth mentioning that the space between the sleeve 2 and the cylinder body 1 and the space between the crimping part 411 and the sleeve 2 are provided for the flow of hydraulic oil.

[0027] It is worth mentioning that the inlet of the cylinder body 1 is provided with a plug cover 7 which is provided with a limiting part 71 and a protruding column 72, the limiting part 71 is sleeved in the air bag sleeve 41, the protruding column 72 is inserted between the sleeve 2 and the air bag sleeve 41, the plug cover 7 not only provides support for the spring 42 assembly 4, but also prevents hydraulic oil from leaking, limits the retraction distance of the piston rod 3 through the limiting part 71, thereby protecting the spring 42 assembly 4 from excessive compression, and forms a labyrinth seal by inserting the protruding column 72 between the sleeve 2 and the air bag sleeve 41.

[0028] The above design scheme can make the product have the advantages of protection function and improved buffering performance.

[0029] The above content is a further detailed description of the utility model in combination with the specific embodiment, and cannot be determined that the specific embodiment of the utility model is limited to these descriptions, and for ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a plurality of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection range determined by the claims of the utility model.

Claims

1. A hydraulic buffer with good buffering effect, comprising a cylinder (1), a sleeve (2) fixed in the cylinder (1), and a piston rod (3) slidably arranged in the sleeve (2), wherein a spring (42) assembly (4) is provided in the sleeve (2) and abuts against the piston rod (3), characterized in that: The spring (42) assembly (4) comprises a gas bag sleeve (41) and a spring (42), outer and inner walls of the gas bag sleeve (41) are provided with a plurality of wrinkle parts (411) from top to bottom, the gas bag sleeve (41) is provided with a cavity (412) for accommodating the spring (42), the wrinkle part (411) is provided with a cavity (413) and is communicated with the cavity (412).

2. Hydraulic damper with good cushioning effect according to claim 1, characterized in that The cylinder (1) is provided with a sealing washer (5), the piston rod (3) is provided with a rod part (31) and passes through the sealing washer (5) and the end surface of the cylinder (1), and the sealing washer (6) is arranged between the rod part (31) and the cylinder (1).

3. Hydraulic damper with good cushioning effect according to claim 2, characterized in that The rod part (31) is provided with a bump cap (32).

4. The hydraulic damper with improved cushioning effect according to claim 2, characterized in that: The sleeve (2) is provided with a threaded part (21), the threaded part (21) is threadedly connected to the inner wall of the cylinder (1) and abuts against the sealing washer (5), a plurality of oil leakage holes (22) are uniformly distributed on the threaded part (21) with a circular point as an axis, a plurality of oil discharge holes (23) and oil return holes (24) are uniformly distributed on the inner wall of the sleeve (2) with a circular point as an axis.

5. The hydraulic damper with improved cushioning effect according to claim 1, characterized in that: The sleeve (2) and the cylinder (1) and the wrinkle part (411) and the sleeve (2) are provided with a spacing for the flow of hydraulic oil.

6. The hydraulic damper with improved cushioning effect according to claim 1, characterized in that: The inlet of the cylinder (1) is provided with a plug cover (7), the plug cover (7) is provided with a limiting part (71) and a convex column (72), the limiting part (71) is sleeved in the gas bag sleeve (41), and the convex column (72) is inserted between the sleeve (2) and the gas bag sleeve (41).

Images