CN215109807U - Multi-stage hydraulic cylinder - Google Patents

Abstract

The utility model discloses a multistage hydraulic cylinder, which comprises a base and a cylinder body, wherein a piston plate and a multistage hydraulic column are arranged in the cylinder body, oil inlet interfaces are arranged on two sides of the cylinder body, a buffer component is arranged in the cylinder body and comprises a buffer plate, a limiting groove, a limiting plate, a folding rod, a buffer spring, an adjusting groove and adjusting blocks, the adjusting groove is symmetrically arranged on the lower surface of the piston plate and is provided with the adjusting blocks in a sliding manner, the two ends of the top of the folding rod are respectively hinged on the two adjusting blocks, the two ends of the bottom of the folding rod are hinged on the limiting plate, the buffer spring is arranged between the folding rods, the buffer plate is arranged in the cylinder body, the upper surface of the buffer plate is provided with the limiting groove matched with the limiting plate, when the hydraulic cylinder is reset, the limiting plate firstly enters the limiting groove, then the piston plate continuously descends to compress the folding rod, and the adjustment of the buffer spring is carried out, reduce the impact force, improve stability, also reduce the influence to the cylinder body.

Description

Multi-stage hydraulic cylinder

Technical Field

The utility model relates to a pneumatic cylinder field specifically is a multistage pneumatic cylinder.

Background

In the existing life, the single-action hydraulic cylinder is a piston type hydraulic cylinder which is provided with a piston column on one side of a piston and can only supply pressure oil to one side of the piston, when the hydraulic cylinder works at a high speed, if the piston directly collides with an end cover of the hydraulic cylinder, the end cover can be damaged under the action of inertia force and hydraulic pressure, and a larger impact load can be generated to generate adverse effect on a hydraulic system. At this moment, a buffer device is required to be installed in the hydraulic cylinder, the speed of the piston can be reduced when the piston reaches the stroke end by using the buffer device, and great damage to the end cover is avoided.

The commonly used buffer device is designed to seal part of oil in an oil discharge cavity within a certain distance before a piston reaches a terminal, and the oil is discharged through a small throttling hole, so that proper buffer pressure is generated, and the aim of speed reduction is fulfilled.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multistage pneumatic cylinder to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a multistage pneumatic cylinder, includes base and cylinder body, is provided with piston plate and multistage hydraulic pressure post in the cylinder body, and both sides are provided with the oil feed interface, be provided with the buffering subassembly in the cylinder body, the buffering subassembly includes buffer board, spacing groove, limiting plate, folding rod, buffer spring, adjustment tank and regulating block, and the adjustment tank symmetry is seted up at piston plate lower surface, and all slides and is provided with the regulating block, folding rod top both ends articulate respectively on two regulating blocks, and the bottom both ends articulate on the limiting plate, buffer spring sets up between the folding rod, the buffer board is installed in the cylinder body and the upper surface seted up with limiting plate matched with spacing groove.

As a further aspect of the present invention: and the oil inlet interface is provided with an electromagnetic valve and a heater.

As a further aspect of the present invention: buffer board and cylinder body inner wall sliding contact and below are provided with auxiliary assembly, auxiliary assembly includes damping spring, fixed plate, telescopic link, mounting panel and sealing washer, and fixed plate and mounting panel fixed mounting are in the cylinder body, and telescopic link and mounting panel fixed connection just are provided with the sealing washer, the telescopic link includes sleeve, loop bar and connecting spring, and the sleeve activity runs through the fixed plate, loop bar lower extreme fixed mounting in cylinder body bottom and with mounting panel fixed connection, the upper end is established in the sleeve through connecting spring movable sleeve, damping spring fixed mounting is at the fixed plate upper surface.

As a further aspect of the present invention: the lifting groove has been seted up to fixed plate top lateral wall, and slidable mounting has the lifter plate in the lifting groove, be provided with auxiliary spring between lifter plate and the fixed plate, the lifter plate upper surface is located damping spring upper end below.

As a further aspect of the present invention: and the bottom of the base is provided with an anti-slip pad.

Compared with the prior art, the beneficial effects of the utility model are that:

through setting up the buffering subassembly, when carrying out the pneumatic cylinder and reseing, at first the limiting plate gets into the spacing inslot, and the piston plate continues to descend the compression folding rod immediately, through buffer spring's regulation, reduces the impact force, improves stability, also reduces the influence to the cylinder body.

Drawings

Fig. 1 is a schematic structural diagram of a multi-stage hydraulic cylinder.

Fig. 2 is a schematic structural diagram of a cushion assembly in a multi-stage hydraulic cylinder.

Fig. 3 is an enlarged view of a structure at a in the multistage hydraulic cylinder.

Fig. 4 is a schematic structural view of a telescopic rod in a multi-stage hydraulic cylinder.

In the figure: 1. a base; 2. a cylinder body; 3. a piston plate; 4. a multi-stage hydraulic column; 5. an oil inlet interface; 6. an electromagnetic valve; 7. a heater; 8. a buffer plate; 9. a limiting groove; 10. a limiting plate; 11. a folding bar; 12. a buffer spring; 13. an adjustment groove; 14. an adjusting block; 15. a damping spring; 16. a lifting groove; 17. a lifting plate; 18. an auxiliary spring; 19. a fixing plate; 20. a telescopic rod; 2001. a sleeve; 2002. a loop bar; 2003. a connecting spring; 21. mounting a plate; 22. a non-slip mat; 23. and (5) sealing rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that, if there is a directional indication (such as up, down, left, right, front, and back) in the embodiment of the present invention, it is only used to explain the relative position relationship between the components, the motion situation, etc. in a certain specific posture, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if a description of "first", "second", etc. is referred to in the present invention, it is used for descriptive purposes only and not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Example 1

Referring to fig. 1-4, in the embodiment of the present invention, a multi-stage hydraulic cylinder includes a base 1 and a cylinder body 2, a piston plate 3 and a multi-stage hydraulic column 4 are disposed in the cylinder body 2, and oil inlet ports 5 are disposed on both sides of the piston plate, a buffer assembly is disposed in the cylinder body 2, the specific type of the buffer assembly is not limited, in this embodiment, preferably, the buffer assembly includes a buffer plate 8, a limiting groove 9, a limiting plate 10, a folding rod 11, a buffer spring 12, an adjusting groove 13 and adjusting blocks 14, the adjusting groove 13 is symmetrically disposed on the lower surface of the piston plate 3, and is slidably disposed with the adjusting blocks 14, the top ends of the folding rod 11 are respectively hinged to the two adjusting blocks 14, and the bottom ends are hinged to the limiting plate 10, the buffer spring 12 is disposed between the folding rods 11, the buffer plate 8 is mounted in the cylinder body 2, and the upper surface of the buffer plate is provided with the limiting groove 9 matching with the limiting plate 10, when the hydraulic cylinder is reset, the limiting plate 10 enters the limiting groove 9, the piston plate 3 continuously descends to compress the folding rod 11, the impact force is reduced through the adjustment of the buffer spring 12, the stability is improved, and the influence on the cylinder body 2 is also reduced.

Specifically, be provided with solenoid valve 6 and heater 7 on the oil feed interface 5, improve the practicality.

Specifically, in order to improve the buffering effect, the buffering plate 8 is in sliding contact with the inner wall of the cylinder body 2, and an auxiliary assembly is arranged below the buffering plate, and the specific type of the auxiliary assembly is not limited, in this embodiment, preferably, the auxiliary assembly includes a damping spring 15, a fixing plate 19, an expansion rod 20, a mounting plate 21 and a sealing ring 23, the fixing plate 19 and the mounting plate 21 are fixedly mounted in the cylinder body 2, the expansion rod 20 is fixedly connected with the mounting plate 21 and provided with the sealing ring 23, the expansion rod 20 includes a sleeve 2001, a loop bar 2002 and a connecting spring 2003, the sleeve 2001 movably penetrates through the fixing plate 19, the lower end of the loop bar 2002 is fixedly mounted at the bottom of the cylinder body 2 and fixedly connected with the mounting plate 21, the upper end of the loop bar is movably sleeved in the sleeve 2001 through the connecting spring 2003, and the damping spring 15 is fixedly mounted on the upper surface of the fixing plate 19.

Specifically, lifting groove 16 has been seted up to fixed plate 19 top lateral wall, and slidable mounting has lifter plate 17 in lifting groove 16, be provided with auxiliary spring 18 between lifter plate 17 and the fixed plate 19, lifter plate 17 upper surface is located damping spring 15 upper end below.

The utility model discloses a theory of operation is:

when the hydraulic cylinder is reset, the limiting plate 10 enters the limiting groove 9, the piston plate 3 continuously descends to compress the folding rod 11, the impact force is reduced through the adjustment of the buffer spring 12, the stability is improved, and the influence on the cylinder body 2 is also reduced.

Example 2

In order to improve the practicability, the embodiment is further improved on the basis of the embodiment 1, and the improvement is that: the bottom of the base 1 is provided with an anti-slip pad 22, so that the stability is improved during working.

In summary, by providing the buffering assembly, when the hydraulic cylinder is reset, the limiting plate 10 enters the limiting groove 9, and then the piston plate 3 continues to descend to compress the folding rod 11, so that the impact force is reduced through the adjustment of the buffering spring 12, the stability is improved, and the influence on the cylinder body 2 is also reduced.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (5)

1. A multi-stage hydraulic cylinder comprises a base (1) and a cylinder body (2), wherein a piston plate (3) and a multi-stage hydraulic column (4) are arranged in the cylinder body (2), oil inlet connectors (5) are arranged on two sides of the cylinder body, it is characterized in that a buffer component is arranged in the cylinder body (2), the buffer component comprises a buffer plate (8), a limit groove (9), a limit plate (10), a folding rod (11), a buffer spring (12), an adjusting groove (13) and an adjusting block (14), the adjusting groove (13) is symmetrically arranged on the lower surface of the piston plate (3), and are all provided with adjusting blocks (14) in a sliding way, both ends of the top of the folding rod (11) are respectively hinged on the two adjusting blocks (14), and both ends of the bottom are hinged on the limit plates (10), the buffer spring (12) is arranged between the folding rods (11), the buffer plate (8) is installed in the cylinder body (2), and the upper surface of the buffer plate is provided with a limiting groove (9) matched with the limiting plate (10).

2. The multi-stage hydraulic cylinder according to claim 1, wherein the oil inlet interface (5) is provided with a solenoid valve (6) and a heater (7).

3. Multistage hydraulic cylinder according to claim 1, characterized in that the damping plate (8) is in sliding contact with the inner wall of the cylinder body (2) and below which an auxiliary assembly is arranged, the auxiliary assembly comprises a damping spring (15), a fixing plate (19), a telescopic rod (20), a mounting plate (21) and a sealing ring (23), the fixing plate (19) and the mounting plate (21) are fixedly mounted in the cylinder body (2), the telescopic rod (20) is fixedly connected with the mounting plate (21) and is provided with the sealing ring (23), the telescopic rod (20) comprises a sleeve (2001), a sleeve rod (2002) and a connecting spring (2003), the sleeve (2001) movably penetrates through the fixing plate (19), the lower end of the sleeve rod (2002) is fixedly arranged at the bottom of the cylinder body (2) and fixedly connected with the mounting plate (21), the upper end of the sleeve rod is movably sleeved in the sleeve (2001) through the connecting spring (2003), the damping spring (15) is fixedly arranged on the upper surface of the fixing plate (19).

4. The multistage hydraulic cylinder according to claim 3, wherein a lifting groove (16) is formed in the side wall above the fixing plate (19), a lifting plate (17) is slidably mounted in the lifting groove (16), an auxiliary spring (18) is arranged between the lifting plate (17) and the fixing plate (19), and the upper surface of the lifting plate (17) is located below the upper end of the damping spring (15).

5. Multistage hydraulic cylinder according to claim 1, characterized in that the base (1) is provided at its bottom with a non-slip mat (22).

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