Buffer type long-service-life hydraulic oil cylinder

Abstract

The utility model provides a buffering type long-life hydraulic oil cylinder which comprises a cylinder barrel, a rear end cover, a front end cover, a piston, a piston rod and an oil inlet and outlet connector, the front end cover and the rear end cover are arranged at the front end and the rear end of the cylinder barrel respectively, the piston rod is arranged in the cylinder barrel in a penetrating mode, and the piston is fixed at the end, inside the cylinder barrel, of the piston rod. The two oil inlet and outlet connectors are fixed to the peripheral wall of the cylinder barrel and communicated with the interior of the cylinder barrel, a buffering device is arranged in the cylinder barrel and fixed to the side wall of the piston, and when the piston rod bears too large external pressure and drastically contracts, the buffering device can be used for buffering the piston rod. The buffer device can be used for buffering, so that the piston rod and the cylinder barrel are effectively prevented from being damaged due to rapid collision between the piston rod and the rear end cover, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a buffer-type long-life hydraulic oil cylinder. Background Art

[0002] The hydraulic cylinder is generally composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. Its function is to convert hydraulic energy into mechanical energy. It is an energy conversion device that converts hydraulic energy into mechanical energy of reciprocating linear motion. The traditional buffer hydraulic cylinder can basically meet people's use needs;

[0003] The existing Chinese patent document CN202221218655.2 discloses an anti-leakage device for a hydraulic cylinder, including a hydraulic cylinder body, a lever is arranged in the hydraulic cylinder body, a first oil seal is fixedly connected to the right side of the hydraulic cylinder body, a sealing shell is fixedly connected to the right side of the hydraulic cylinder body, a sealing block is arranged in the sealing shell, and a fixed cover is arranged on the outer side of the right end of the sealing block. In the utility model, by arranging the hydraulic cylinder body, sealing shell, sealing block, first oil seal, sealing sleeve and second oil seal, the outer side of the lever can be conveniently sealed in multiple ways, so that the sealing effect is better, oil leakage is prevented, and the use of the hydraulic cylinder is more stable. By arranging the fixed cover and dustproof cotton plate, dust can be prevented from entering the sealing shell when the lever is retracted into the hydraulic cylinder body, and dust can be prevented from damaging the first oil seal, the sealing sleeve and the second oil seal, so that the service life of the cylinder is extended.

[0004] However, the above patent has certain defects when used. The device lacks a buffer device, and the buffer effect is poor, which makes the pressure of the hydraulic cylinder too high, thereby shortening the service life of the hydraulic cylinder.

[0005] For this reason, a buffer-type long-life hydraulic cylinder is proposed here to solve the above-mentioned problems. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a buffer-type long-life hydraulic cylinder.

[0007] The utility model is implemented by the following technical solutions:

[0008] A buffer-type long-life hydraulic oil cylinder, comprising a cylinder barrel, a rear end cover, a front end cover, a piston, a piston rod and an oil inlet and outlet joint, wherein the front end cover and the rear end cover are respectively arranged at the front and rear ends of the cylinder barrel, the piston rod is inserted into the cylinder barrel, the piston is fixed to one end of the piston rod inside the cylinder barrel, two oil inlet and outlet joints are provided, which are respectively fixed on the outer peripheral wall of the cylinder barrel and are connected with the inside of the cylinder barrel, and a buffer device is provided inside the cylinder barrel, and the buffer device is fixed on the side wall of the piston;

[0009] The buffer device includes a buffer block, a buffer shell, a buffer spring and a slide plate. The buffer shell is fixed on the side wall of the piston close to the rear end cover. A cavity is provided inside the buffer shell. The slide plate is arranged in the cavity. The spring is arranged between the slide plate and the cavity. One end of the buffer block is fixed on the side wall of the slide plate.

[0010] A buffer spring is arranged inside the cylinder, and two buffer springs are arranged, one of the buffer springs is arranged at the front end cover, and the other is arranged at the rear end cover.

[0011] A dust cover is arranged on the outer peripheral wall of the front end cover, one end of the dust cover is fixed on the front end cover, and the other end is fixed on the front end of the piston rod, and the dust cover is retractable.

[0012] The front end cover and the rear end cover are respectively provided with mounting holes, and a plurality of mounting holes are provided. The front end cover and the rear end cover are fixedly connected to the cylinder barrel by screws.

[0013] The front end cover and the rear end cover are respectively provided with earrings, and the earrings are divided into front earrings and rear earrings. The front earrings are fixed on the front end cover, and the rear earrings are fixed on the rear end cover.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. By setting a buffer device inside the cylinder, when the piston rod is subjected to excessive external pressure and the piston rod contracts sharply, the buffer device can be used for buffering, effectively preventing the piston rod from colliding quickly with the rear end cover, thereby causing damage to the piston rod and the cylinder, and extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0017] Figure 2 It is an exploded schematic diagram of the overall three-dimensional structure of the utility model;

[0018] Figure 3 It is a front structural schematic diagram of the utility model;

[0019] Figure 4 yes Figure 3 Schematic diagram of the AA section structure;

[0020] Figure 5 yes Figure 4 A schematic diagram of the structure enlargement in the middle;

[0021] In the figure: 1, cylinder barrel; 11, oil inlet and outlet joints; 2, front earring; 3, rear earring; 4, dust cover; 5, rear end cover; 51, mounting hole; 6, front end cover; 7, piston rod; 8, piston; 9, buffer spring; 10, buffer block; 101, slide plate; 102, buffer shell; 103, cavity. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0023] The utility model is further described below in conjunction with the accompanying drawings.

[0024] like Figures 1 to 5 As shown, a buffer-type long-life hydraulic cylinder comprises a cylinder barrel 1, a rear end cover 5, a front end cover 6, a piston 8, a piston rod 7 and an oil inlet and outlet joint 11, wherein the front end cover 6 and the rear end cover 5 are respectively arranged at the front and rear ends of the cylinder barrel 1, the piston rod 7 is passed through the cylinder barrel 1, the piston 8 is fixed to one end of the piston rod 7 inside the cylinder barrel 1, two oil inlet and outlet joints 11 are provided, which are respectively fixed on the outer peripheral wall of the cylinder barrel 1 and are connected with the inside of the cylinder barrel 1, a buffer device is provided inside the cylinder barrel 1, and the buffer device is fixed on the side wall of the piston 8; sealing rings are provided on the outer peripheral walls of the piston 8, the front end cover 6 and the rear end cover 5, and the setting of the sealing ring enhances the sealing performance between the piston 8, the front end cover 6 and the rear end cover 5 and the cylinder barrel 1 to prevent leakage of hydraulic oil.

[0025] The buffer device includes a buffer block 10, a buffer shell 102, a buffer spring 9 and a slide plate 101. The buffer shell 102 is fixed on the side wall of the piston 8 close to the rear end cover 5. A cavity 103 is provided inside the buffer shell 102. The slide plate 101 is arranged in the cavity 103. The spring is arranged between the slide plate 101 and the cavity 103. One end of the buffer block 10 is fixed on the side wall of the slide plate 101.

[0026] A buffer spring 9 is provided inside the cylinder 1. Two buffer springs 9 are provided, one of which is provided at the front end cover 6 and the other is provided at the rear end cover 5. When the buffer spring 9 contacts the piston 8, the buffer spring 9 is squeezed to provide shock absorption and buffering, thereby effectively preventing the piston 8 from making rigid contact with the front end cover 6 and the rear end cover 5, thereby protecting the device.

[0027] A dust cover 4 is provided on the outer peripheral wall of the front end cover 6, one end of the dust cover 4 is fixed on the front end cover 6, and the other end is fixed to the front end of the piston rod 7. The dust cover 4 is retractable and can follow the piston rod 7 to effectively prevent dust from contaminating the interior of the hydraulic cylinder.

[0028] The front end cover 6 and the rear end cover 5 are respectively provided with mounting holes 51, and there are multiple mounting holes 51. The front end cover 6 and the rear end cover 5 are fixedly connected to the cylinder barrel 1 by screws. The front and rear end covers 5 are connected to the cylinder barrel 1 by screws and can be detachably installed and maintained, which greatly facilitates maintenance and installation personnel and improves work efficiency.

[0029] The front end cover 6 and the rear end cover 5 are respectively provided with earrings, and the earrings are divided into front earrings 2 and rear earrings 3. The front earrings 2 are fixed on the front end cover 6, and the rear earrings 3 are fixed on the rear end cover 5.

[0030] The working principle of the utility model is as follows: when the hydraulic cylinder is suddenly subjected to external pressure, the external pressure is too large, the piston rod 7 suddenly retracts quickly, the buffer block 10 contacts the rear end cover 5, and the buffer block 10 drives the slide plate 101 to move into the buffer shell 102, and after contacting the buffer spring 9 inside the cavity 103, the buffer spring 9 absorbs part of the impact force and buffers the entire piston rod 7;

[0031] When the piston 8 moves toward the rear end cover 5, the buffer spring 9 in the cylinder 1 also contacts the piston 8 to provide shock absorption and buffering, thereby effectively avoiding damage to the piston 8 assembly caused by excessive pressure in the cylinder and extending the service life of the device.

[0032] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A buffer-type long-life hydraulic cylinder, comprising a cylinder barrel (1), a rear end cover (5), a front end cover (6), a piston (8), a piston rod (7) and an oil inlet and outlet joint (11), wherein the front end cover (6) and the rear end cover (5) are respectively arranged at the front and rear ends of the cylinder barrel (1), the piston rod (7) is inserted into the cylinder barrel (1), the piston (8) is fixed to one end of the piston rod (7) inside the cylinder barrel (1), and two oil inlet and outlet joints (11) are provided, which are respectively fixed on the outer peripheral wall of the cylinder barrel (1) and are connected to the inside of the cylinder barrel (1), characterized in that: A buffer device is provided inside the cylinder (1), and the buffer device is fixed on the side wall of the piston (8); The buffer device comprises a buffer block (10), a buffer shell (102), a buffer spring (9) and a slide plate (101); the buffer shell (102) is fixed on the side wall of the piston (8) close to the rear end cover (5); a cavity (103) is provided inside the buffer shell (102); the slide plate (101) is arranged in the cavity (103); the spring is arranged between the slide plate (101) and the cavity (103); and one end of the buffer block (10) is fixed on the side wall of the slide plate (101).

2. A buffer-type long-life hydraulic cylinder according to claim 1, characterized in that: A buffer spring (9) is arranged inside the cylinder (1), and two buffer springs (9) are arranged, one of which is arranged at the front end cover (6) and the other is arranged at the rear end cover (5).

3. A buffer-type long-life hydraulic cylinder according to claim 2, characterized in that: A dust cover (4) is provided on the outer peripheral wall of the front end cover (6), one end of the dust cover (4) is fixed on the front end cover (6), and the other end is fixed on the front end of the piston rod (7), and the dust cover (4) is retractable.

4. The buffer-type long-life hydraulic cylinder according to claim 3 is characterized in that: The front end cover (6) and the rear end cover (5) are respectively provided with mounting holes (51), and a plurality of mounting holes (51) are provided. The front end cover (6) and the rear end cover (5) are fixedly connected to the cylinder barrel (1) by means of screws.

5. The buffer-type long-life hydraulic cylinder according to claim 4, characterized in that: The front end cover (6) and the rear end cover (5) are respectively provided with earrings, and the earrings are divided into front earrings (2) and rear earrings (3). The front earrings (2) are fixed on the front end cover (6), and the rear earrings (3) are fixed on the rear end cover (5).

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