阅读说明：本技术 一种多级液压缸 (Multistage hydraulic cylinder ) 是由 王博文 于 2019-09-25 设计创作，主要内容包括：本发明公开了一种多级液压缸包括缸筒、第一活塞、第二活塞、第三活塞、其中第一活塞套在第二活塞内、第二活塞套在第一活塞内、第三活塞套在第二活塞内、第三活塞上面设有夹物架且对称分布于第三活塞上端、缸筒上设有固定装置且对称分布于缸筒表面、缸筒上设有出油管和进油管。结构简单,可以传动更长的距离,没有传动间隙,运动平稳。(The invention discloses a multistage hydraulic cylinder which comprises a cylinder barrel, a first piston, a second piston and a third piston, wherein the first piston is sleeved in the second piston, the second piston is sleeved in the first piston, the third piston is sleeved in the second piston, a rack is arranged on the third piston and symmetrically distributed at the upper end of the third piston, a fixing device is arranged on the cylinder barrel and symmetrically distributed on the surface of the cylinder barrel, and an oil outlet pipe and an oil inlet pipe are arranged on the cylinder barrel. The structure is simple, the transmission can be carried out for a longer distance, no transmission gap exists, and the motion is stable.)

1. A multi-stage hydraulic cylinder, comprising: including cylinder (1), be equipped with first piston (2) in cylinder (1), be equipped with second piston (3) in first piston (2), be equipped with third piston (4) in second piston (3), be equipped with above third piston (4) and press from both sides thing frame (5) and symmetric distribution in third piston upper end, be equipped with fixing device (6) and symmetric distribution on cylinder (1) surface on cylinder (1) be equipped with out oil pipe (7) and advance oil pipe (8) on cylinder (1).

2. The multi-stage hydraulic cylinder of claim 1, wherein: the first piston (2) is positioned inside the cylinder barrel (1) and can move up and down.

3. The multi-stage hydraulic cylinder of claim 1, wherein: the second piston (3) is positioned inside the first piston (2) and can move up and down.

4. The multi-stage hydraulic cylinder of claim 1, wherein: the third piston (4) is positioned inside the second piston (3) and can move up and down.

5. The multi-stage hydraulic cylinder of claim 1, wherein: the object clamping frame (5) is connected with the third piston (4) in a welding mode.

6. The multi-stage hydraulic cylinder of claim 1, wherein: the fixing devices (6) are eight in total and are connected with the cylinder barrel (1) in a welding mode.

7. The multi-stage hydraulic cylinder of claim 1, wherein: the oil outlet pipe (7) is connected with the cylinder barrel (1) in a welding mode.

8. The multi-stage hydraulic cylinder of claim 1, wherein: the oil inlet pipe (8) is connected with the cylinder barrel (1) in a welding mode.

Technical Field

The invention relates to the field of hydraulic transmission, in particular to a multi-stage hydraulic cylinder.

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion (or swinging motion), and has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. However, the existing hydraulic cylinder cannot meet the requirements of some machines, so that a multi-stage hydraulic cylinder transmission device is improved on the basis of the existing hydraulic cylinder.

Disclosure of Invention

The invention aims to overcome the technical defects and provide a multi-stage hydraulic cylinder.

In order to solve the technical problem, the technical scheme provided by the invention is that the multi-stage hydraulic cylinder comprises the following components: the oil cylinder comprises a cylinder barrel, a first piston is arranged in the cylinder barrel, a second piston is arranged in the first piston, a third piston is arranged in the second piston, a clamping frame is arranged above the third piston and symmetrically distributed at the upper end of the third piston, a fixing device is arranged on the cylinder barrel, the fixing device and the fixing device are symmetrically distributed on the surface of the cylinder barrel, and an oil outlet pipe and an oil inlet pipe are arranged on the cylinder barrel.

As a modification, the first piston is located inside the cylinder and can move up and down.

As a modification, the second piston is located inside the first piston and can move up and down.

As a modification, the third piston is located inside the second piston and can move up and down.

As an improvement, the clamping frame and the third piston are connected in a welding mode.

As a modification, the first fixing device is eight in number and is welded with the cylinder barrel.

As an improvement, the oil outlet pipe is connected with the cylinder barrel in a welding mode.

As an improvement, the oil inlet pipe is connected with the cylinder barrel in a welding mode.

Compared with the prior art, the invention has the advantages that: the structure is simple, the transmission can be carried out for a longer distance, no transmission gap exists, and the motion is stable.

Drawings

Fig. 1 is a schematic view of a first construction of a multi-stage hydraulic cylinder of the present invention.

Fig. 2 is a second structural schematic diagram of a multi-stage hydraulic cylinder of the present invention.

Fig. 3 is a bottom view of a multi-stage hydraulic cylinder of the present invention.

As shown in the figure: 1. the device comprises a cylinder barrel, 2, a first piston, 3, a second piston, 4, a third piston, 5, a clamping frame, 6, a fixing device, 7, an oil outlet pipe, 8 and an oil inlet pipe.

Detailed Description

The multi-stage hydraulic cylinder of the present invention will be described in further detail with reference to the accompanying drawings.

With reference to the attached drawings 1-3, the multistage hydraulic cylinder comprises a cylinder barrel 1, wherein a first piston 2 is arranged in the cylinder barrel 1, a second piston 3 is arranged in the first piston 2, a third piston 4 is arranged in the second piston 3, a clamping frame 5 is arranged on the third piston 4 and symmetrically distributed at the upper end of the third piston, a fixing device 6 is arranged on the cylinder barrel 1 and symmetrically distributed on the surface of the cylinder barrel 1, and an oil outlet pipe 7 and an oil inlet pipe 8 are arranged on the cylinder barrel 1.

The first piston 2 is located inside the cylinder 1 and can move up and down.

The second piston 3 is located inside the first piston 2 and can move up and down.

The third piston 4 is located inside the second piston 3 and can move up and down.

The object clamping frame 5 and the third piston 4 are connected through welding.

The fixing devices 6 are eight in total and are welded with the cylinder barrel 1.

The oil outlet pipe 7 is connected with the cylinder barrel 1 in a welding mode.

The oil inlet pipe 8 is connected with the cylinder barrel 1 in a welding mode.

When the hydraulic cylinder is implemented specifically, the oil is fed through the oil inlet pipe to increase the pressure in the hydraulic cylinder, the piston in the hydraulic cylinder extends outwards, the extending sequence is from large to small, and when the hydraulic cylinder retracts in a no-load mode, the oil is discharged through the oil outlet pipe, the pressure in the hydraulic cylinder is reduced, the piston in the hydraulic cylinder retracts inwards, and the sequence is generally from small to large. The telescopic cylinder can realize longer stroke, has shorter length when retracting, has more compact structure and can more effectively convert energy.

The working principle of the invention is as follows: when the hydraulic cylinder works, the oil is fed through the oil inlet pipe to increase the pressure in the hydraulic cylinder, and a piston in the hydraulic cylinder extends outwards; the oil outlet pipe discharges oil, the pressure in the hydraulic cylinder is reduced, the piston in the hydraulic cylinder contracts inwards, and hydraulic energy is converted into mechanical energy.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.