CN219911363U - Hydraulic lower pull rod limiting device - Google Patents

Abstract

The utility model discloses a hydraulic lower pull rod limiting device, which relates to the technical field of hydraulic equipment and comprises a sliding column and a sealing cylinder, wherein a limiting plate is fixedly connected to the inner side wall of the sealing cylinder, a buffer ring is arranged on the outer side of the limiting plate, a fixed block is fixedly connected to the side wall of the buffer ring, and a gradual change sliding groove is formed in the side wall of the limiting plate.

Description

Hydraulic lower pull rod limiting device

Technical Field

The utility model relates to the technical field of hydraulic equipment, in particular to a hydraulic lower pull rod limiting device.

Background

Hydraulic is a term for the mechanical and electromechanical industries. Hydraulic pressure may be transmitted in a power transmission manner, referred to as hydraulic transmission. Hydraulic pressure can also be used as a control mode, which is called hydraulic control, and hydraulic transmission and pneumatic transmission are called fluid transmission, which are an emerging technology developed according to the hydrostatic pressure transmission principle proposed by pascal of 17 th century, the connecting rod operated by the hydraulic principle is a telescopic rod which can be further divided into an upper ejector rod and a lower pull rod according to different movement directions.

In the prior art, as disclosed in chinese patent CN212708780U, a "hydraulic lower pull rod limiting device" includes lower pull rods located on the left and right sides and lower pull rod supports for connecting the lower pull rods. Wherein, the outside of the lower pull rod at one side is provided with a limit oil cylinder assembly. The limiting oil cylinder assembly comprises a limiting oil cylinder, a limiting oil cylinder support, a limiting connecting plate and a limiting connecting seat. The limiting oil cylinder support is fixed on the tractor, one end of the limiting oil cylinder is connected to the limiting oil cylinder support, the other end of the limiting oil cylinder is fixedly provided with a limiting connecting fork, the limiting connecting seat is fixed on the lower pull rod, two ends of the limiting connecting plate are respectively hinged with the limiting connecting fork and the limiting connecting seat through limiting connecting pins, and the limiting connecting plate, the limiting connecting fork and the limiting connecting seat can respectively rotate around the limiting connecting pins in the horizontal direction.

But among the prior art, the hydraulic control direction of motion of pull-down rod is down, advances oil through the oil circuit of upper side and provides driving force, and when other objects of pull-down rod control downwardly moving, need the stroke that moves through stop device control object, satisfies actual industrial production demand, and current stop device is generally hard spacing, and after the piston moved spacing point, it just cushioned stroke is little to make the impact effort that the piston received big, leads to the piston yielding, has reduced the life of pull-down rod.

Disclosure of Invention

The utility model aims to solve the problems that in the prior art, after a piston moves to a limiting point, the buffer stroke is small, so that the impact acting force applied to the piston is large, the piston is easy to deform, and the service life of a pull-down rod is shortened.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a pull rod stop device under fluid pressure type, includes sliding column and seal cylinder, the inside wall fixedly connected with limiting plate of seal cylinder, the limiting plate outside is provided with the buffer ring, the lateral wall fixedly connected with fixed block of buffer ring, the gradual change spout has been seted up to the lateral wall of limiting plate, the inside wall sliding connection of gradual change spout has the sliding block, the sliding block with rotate between the fixed block and be connected with the dwang.

Preferably, the side wall of the limiting plate is provided with a round hole, and the inner side wall of the round hole is connected with a connecting column in a sliding manner.

Preferably, one end of the connecting column is fixedly connected with a limiting ring, and the other end of the connecting column is fixedly connected with the side wall of the buffer ring.

Preferably, one end of the sliding column is fixedly connected with a piston, and the other end of the sliding column is fixedly connected with a pull ring.

Preferably, the outer side wall of the pull ring is fixedly connected with a rubber sleeve, and the outer side wall of the sealing cylinder is fixedly connected with an oil delivery pipe.

Preferably, the outer side wall of the piston is in sliding connection with the inner side wall of the sealing cylinder.

Preferably, one end of the sealing cylinder is fixedly connected with a fixing seat, and one end of the sealing cylinder is fixedly connected with a telescopic ring.

Compared with the prior art, the utility model has the advantages and positive effects that:

1. according to the utility model, the buffer ring moves the limiting ring through tight lap joint between the piston and the buffer ring, the gap between the buffer ring and the limiting plate is reduced, the sliding block driven by the rotating rod slides, the sliding block slides in the gradual change sliding groove, the gradual change sliding groove is an inward contracted sliding groove, the gradual change sliding groove moves towards the center more, the gap of the inner side wall of the gradual change sliding groove is smaller, the friction force between the sliding block and the gradual change sliding groove is larger, and the sliding block slides from one end of the gradual change sliding groove to the other end of the gradual change sliding groove, so that the buffering effect on the limiting of the buffer ring is realized, and the effect of soft limiting is realized.

2. According to the utility model, the rubber sleeve is arranged on the inner side wall of the pull ring, so that the holding comfort is improved, the two oil delivery pipes are arranged on the outer side of the sealing cylinder, one oil delivery pipe is used for oil feeding, and the other oil delivery pipe is used for oil feeding, so that the piston can move in a portable manner in the sealing cylinder, and the connecting column is arranged between the limiting ring and the buffering ring, so that the limiting position of the connecting column and the limiting plate is limited, and the moving stability of the buffering ring is improved.

Drawings

Fig. 1 is a schematic perspective view of a hydraulic lower pull rod limiting device according to the present utility model;

fig. 2 is a schematic diagram of the internal structure of a seal cylinder in a hydraulic lower pull rod limiting device according to the present utility model;

FIG. 3 is a schematic view showing a structure of a buffer ring in a hydraulic lower pull rod limiting device according to the present utility model;

fig. 4 is a schematic diagram of the outer side structure of a limiting plate in a hydraulic lower pull rod limiting device according to the present utility model.

Legend description: 1. a sliding column; 2. a sealing cylinder; 3. an oil delivery pipe; 4. a pull ring; 5. a fixing seat; 6. a telescopic ring; 7. a piston; 8. a limiting ring; 9. a limiting plate; 10. a buffer ring; 11. a connecting column; 12. a round hole; 13. a rotating lever; 14. a sliding block; 15. gradual change chute; 16. and a fixed block.

Description of the embodiments

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.

Examples

As shown in fig. 1-4, the utility model provides a hydraulic lower pull rod limiting device, which comprises a sliding column 1 and a sealing cylinder 2, wherein the inner side wall of the sealing cylinder 2 is fixedly connected with a limiting plate 9, the outer side of the limiting plate 9 is provided with a buffer ring 10, the side wall of the buffer ring 10 is fixedly connected with a fixed block 16, the side wall of the limiting plate 9 is provided with a gradual change chute 15, the inner side wall of the gradual change chute 15 is slidably connected with a sliding block 14, and a rotating rod 13 is rotatably connected between the sliding block 14 and the fixed block 16.

The specific setting and action of this embodiment will be described in detail below, when in use, the sliding column 1 slides inside the sealing cylinder 2 through the piston 7, the sliding column 1 pulls downwards, after the sliding column 1 drives the piston 7 to return upwards, the piston 7 and the buffer ring 10 are tightly lapped, the buffer ring 10 drives the stop collar 8 to move, and the gap between the buffer ring 10 and the stop plate 9 is reduced, thereby the rotating rod 13 turns over to one side, the sliding block 14 of the rotating rod 13 slides, the sliding block 14 slides inside the gradual change sliding groove 15, the gradual change sliding groove 15 is an inward contracted sliding groove, the gradual change sliding groove 15 moves towards the center, the smaller the gap between the inner side wall of the gradual change sliding groove 15 is, the larger the friction force between the sliding block 14 and the gradual change sliding groove 15 is, and the buffering action of limiting the buffer ring 10 is realized in the process that the sliding block 14 slides from one end of the gradual change sliding groove 15 to the other end.

Examples

As shown in fig. 1-4, a circular hole 12 is formed in the side wall of the limiting plate 9, and a connecting column 11 is connected to the inner side wall of the circular hole 12 in a sliding manner. One end of the connecting column 11 is fixedly connected with the limiting ring 8, and the other end of the connecting column 11 is fixedly connected with the side wall of the buffer ring 10. One end fixedly connected with piston 7 of slip post 1, the other end fixedly connected with pull ring 4 of slip post 1. The outer side wall of the pull ring 4 is fixedly connected with a rubber sleeve, and the outer side wall of the sealing cylinder 2 is fixedly connected with an oil delivery pipe 3. The outer side wall of the piston 7 is in sliding connection with the inner side wall of the sealing cylinder 2. One end fixedly connected with fixing base 5 of sealed section of thick bamboo 2, one end fixedly connected with expansion ring 6 of sealed section of thick bamboo 2.

The effect that its whole embodiment reached is, through installing fixing base 5 in the one end of seal tube 2, install expansion ring 6 at the other end of seal tube 2, expansion ring 6 starts spacing effect to sliding column 1, fixing base 5 passes through screw fixed connection, through setting up the rubber sleeve at the inside wall of pull ring 4, the comfort level of holding is improved to the improvement hand, through setting up two oil delivery pipes 3 in the outside of seal tube 2, one oil delivery pipe 3 advances oil, another oil delivery pipe 3 advances oil to make piston 7 can portable removal in the inside of seal tube 2, through setting up spliced pole 11 between spacing ring 8 and cushion collar 10, spliced pole 11 and limiting plate 9 limit position, the stability of cushion collar 10 removal has been promoted.

The application method and the working principle of the device are as follows: when the sliding column 1 is pulled downwards, oil is fed through one oil conveying pipe, oil is fed through the other oil conveying pipe, then the sliding column 1 returns upwards, oil is fed through the one oil conveying pipe, and oil is fed through the other oil conveying pipe;

after the sliding column 1 drives the piston 7 to return upwards, the piston 7 and the buffer ring 10 are tightly overlapped, the buffer ring 10 drives the limiting ring 8 to move, the gap between the buffer ring 10 and the limiting plate 9 is reduced, the sliding block 14 of the rotating rod 13 slides, the sliding block 14 slides in the gradual change sliding groove 15, and the sliding block 14 slides from one end of the gradual change sliding groove 15 to the other end, so that the limiting buffer effect of the buffer ring 10 is realized.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims (7)

1. The utility model provides a fluid pressure type pull rod stop device down, includes slip post (1) and seal cylinder (2), its characterized in that: the utility model discloses a sealing device for a sealed cylinder, including sealed section of thick bamboo (2), inside wall fixedly connected with limiting plate (9), limiting plate (9) outside is provided with buffer ring (10), lateral wall fixedly connected with fixed block (16) of buffer ring (10), gradual change spout (15) have been seted up to the lateral wall of limiting plate (9), the inside wall sliding connection of gradual change spout (15) has sliding block (14), sliding block (14) with rotate between fixed block (16) and be connected with dwang (13).

2. The hydraulic drop bar retention device of claim 1, wherein: the side wall of limiting plate (9) has seted up round hole (12), the inside wall sliding connection of round hole (12) has spliced pole (11).

3. A hydraulic drop bar stop as defined in claim 2, wherein: one end of the connecting column (11) is fixedly connected with a limiting ring (8), and the other end of the connecting column (11) is fixedly connected with the side wall of the buffer ring (10).

4. The hydraulic drop bar retention device of claim 1, wherein: one end of the sliding column (1) is fixedly connected with a piston (7), and the other end of the sliding column (1) is fixedly connected with a pull ring (4).

5. The hydraulic drop bar retention device of claim 4, wherein: the outer side wall of the pull ring (4) is fixedly connected with a rubber sleeve, and the outer side wall of the sealing cylinder (2) is fixedly connected with an oil delivery pipe (3).

6. The hydraulic drop bar retention device of claim 4, wherein: the outer side wall of the piston (7) is in sliding connection with the inner side wall of the sealing cylinder (2).

7. The hydraulic drop bar retention device of claim 1, wherein: one end fixedly connected with fixing base (5) of seal section of thick bamboo (2), one end fixedly connected with expansion ring (6) of seal section of thick bamboo (2).