CN213870535U

CN213870535U - Hydraulic cylinder capable of accurately controlling buffering performance

Info

Publication number: CN213870535U
Application number: CN202023063028.XU
Authority: CN
Inventors: 苏建宁; 李雪山; 李盛; 张松; 刘辉; 王志国; 宋贵彬; 林志海
Original assignee: Yantai Future Automatic Equipments Co ltd
Current assignee: Yantai Future Automatic Equipments Co ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-08-03
Anticipated expiration: 2030-12-18

Abstract

The utility model discloses a hydraulic cylinder for accurately controlling the buffering performance, which comprises a cylinder body, a rear cover, a guide sleeve, a piston rod, a rodless cavity oil port and a rod cavity oil port; two hole sealing rings are arranged on the piston, two communicated throttling holes are arranged in the piston, the first throttling hole is positioned between the two hole sealing rings, and the second throttling hole is positioned below the first hole sealing ring; first hole is with sealing washer motion surpassed behind the pole chamber hydraulic fluid port first orifice with have the pole chamber hydraulic fluid port to communicate with each other, the utility model discloses buffer structure is simple, and the processing of being convenient for just can realize the buffer function of pneumatic cylinder under the condition that does not need plus buffering plunger, the position that accurate control buffering speed and buffering begin, and working property is reliable and stable. The utility model has the advantages of simple structure, it is economical and practical, the accurate controllable, the buffering effect of buffer position is stable.

Description

Hydraulic cylinder capable of accurately controlling buffering performance

Technical Field

The utility model relates to a pneumatic cylinder of accurate control shock-absorbing capacity belongs to pneumatic cylinder technical field.

Background

At present, in the technical field of hydraulic pressure, a buffer structure of a hydraulic cylinder is mainly that a buffer plunger is arranged at the front end and the rear end of a piston, and a buffer groove matched with the buffer plunger is designed in an end cover. When the piston moves to the tail end of the stroke, the buffering plunger piston enters the buffering groove of the end cover, and oil liquid flows out through the buffering gap between the buffering plunger piston and the buffering groove of the end cover, so that the buffering effect is achieved. However, the hydraulic cylinder is often poor in buffering effect because the welding or assembly error of the end cover causes the buffering clearance to be small and large. Further, at the moment when the damper plunger is disengaged from the damper groove, abnormal noise is generated due to the instantaneous increase of the oil chamber space.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough and provide a pneumatic cylinder of accurate control shock-absorbing capacity.

The utility model provides a technical scheme as follows: a hydraulic cylinder capable of accurately controlling the buffering performance comprises a cylinder body, a rear cover fixed at one end of the cylinder body, a guide sleeve fixed at the other end of the cylinder body, a piston in the cylinder body, and a piston rod, wherein one end of the piston rod penetrates through a guide hole of the guide sleeve and is arranged in the cylinder body and connected with the piston; the piston is provided with a first hole sealing ring and a second hole sealing ring, a first throttling hole and a second throttling hole are arranged in the piston, the first throttling hole is positioned between the first hole sealing ring and the second hole sealing ring, and the second throttling hole is positioned below the first hole sealing ring and communicated with the first throttling hole; the first orifice on the piston is communicated with the oil port of the rod cavity after the first hole on the piston exceeds the oil port of the rod cavity by the movement of the sealing ring.

Furthermore, a first O-shaped ring, a second O-shaped ring and an O-shaped ring retainer ring are arranged on the guide sleeve, a shaft sealing ring, a Stent seal and a dust ring are arranged in the guide sleeve, a guide ring is arranged in the guide sleeve, and a third O-shaped ring is arranged in the piston.

The utility model has the advantages that: the utility model discloses a be equipped with buffering with first hole sealing washer and buffering orifice on the piston, after the buffering passes through the pole chamber hydraulic fluid port with first hole sealing washer on the cylinder body, fluid in the cylinder body can only flow through the orifice on the piston, and the flow of fluid is restricted to reach buffer function. The utility model discloses buffer structure is simple, and the processing of being convenient for just can realize the buffer function of pneumatic cylinder under the condition that does not need plus buffering plunger, simultaneously can be through the big or small accurate control buffer speed of control orifice diameter, and the position through the sealing washer is used in the adjustment buffering comes the position that the accurate control buffering began, and working property is reliable and stable. The utility model has the advantages of simple structure, it is economical and practical, the accurate controllable, the buffering effect of buffer position is stable.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of an orifice portion of a piston according to the present invention;

fig. 3 is a schematic structural diagram of the starting buffering position of the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be made with reference to the accompanying drawings:

as shown in fig. 1 to 3, a hydraulic cylinder for precisely controlling damping performance includes a rear cover 1, a cylinder body 2, a piston 3, a piston rod 4, a guide sleeve 6, and a single lug rod 7. The rear cover 1 is welded and fixed at one end of the cylinder body 2, the guide sleeve 6 is fixedly assembled at the other end of the cylinder body 2, the piston 3 and the piston rod 4 are arranged in the cylinder body 2, a guide hole matched with the piston rod 4 is arranged in the guide sleeve 6, one end of the piston rod 4 passes through the guide hole of the guide sleeve 6 and then is arranged in the cylinder body 2, and is fixedly connected with the piston 3 through a locking nut 18 and a set screw 19; the other end of the piston rod 4 is connected with a single ear connecting rod 7. The piston 3 divides the cylinder body 2 into a rodless cavity 20 and a rod cavity 21, and a rodless cavity oil port 5-1 for communicating the rodless cavity 20 and a rod cavity oil port 5-2 for communicating the rod cavity 21 are arranged on the outer wall of the cylinder body 2.

Wherein, the guide sleeve 6 is provided with a first O-shaped ring 10, a second O-shaped ring 13 and an O-shaped ring retainer ring 14 for sealing the gap between the guide sleeve 6 and the cylinder body 2, the guide sleeve 6 is provided with a shaft seal ring 9, a Stent seal 12 and a dust ring 8 for sealing the gap between the piston rod 4 and the guide sleeve 6, and the guide sleeve 6 is provided with a guide ring 11 for supporting and guiding the piston rod 4. The piston 3 is provided with a first hole seal 15 and a second hole seal 17 for sealing a gap between the piston 3 and the cylinder 2, and the piston 3 is provided with a third O-ring 16 for sealing a gap between the piston 3 and the piston rod 4.

As shown in FIG. 2, a first orifice 3-1 and a second orifice 3-2 are provided in the piston 3, the first orifice 3-1 is located between the first hole seal ring 15 and the second hole seal ring 17, and the second orifice 3-2 is located below the first hole seal ring 15 and communicates with the first orifice 3-1. When the first hole on the piston 3 moves beyond the rod chamber port 5-2 with the seal ring 15, the first orifice 3-1 communicates with the rod chamber port 5-2.

The working principle is as follows: when oil is injected from the rodless cavity oil port 5-1 to push the piston 3 to move, when the piston moves to the position that the first hole sealing ring 15 passes through the rod cavity oil port 5-2, namely the position shown in figure 3, the hole sealing ring 15 seals the gap between the piston 3 and the cylinder body 2, the oil in the rod cavity 21 can only flow out through the second throttle hole 3-2 and the first throttle hole 3-1 on the piston 3 and the rod cavity oil port 5-2, and the oil outlet flow of the rod cavity 21 is limited, so that the buffer function is realized. The diameter of the first throttling hole 3-1 can be adjusted according to actual needs to accurately control the buffering speed, and the position of the buffering starting position is accurately controlled by the position of the sealing ring 15 or the oil port 5-2 of the rod cavity of the adjusting hole.

It should be understood that parts of the specification not set forth in detail are well within the prior art. The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art are intended to fall within the scope of the present invention as defined by the claims.

Claims

1. A hydraulic cylinder capable of accurately controlling the buffering performance comprises a cylinder body (2), a rear cover (1) fixed at one end of the cylinder body (2), a guide sleeve (6) fixed at the other end of the cylinder body (2), a piston (3) in the cylinder body (2), and a piston rod (4) with one end penetrating through a guide hole of the guide sleeve (6) and arranged in the cylinder body (2) and connected with the piston (3), and is characterized in that a rodless cavity oil port (5-1) used for communicating a rodless cavity (20) and a rod cavity oil port (5-2) used for communicating a rod cavity (21) are arranged on the cylinder body (2); a first hole sealing ring (15) and a second hole sealing ring (17) are arranged on the piston (3), a first throttling hole (3-1) and a second throttling hole (3-2) are arranged in the piston (3), the first throttling hole (3-1) is positioned between the first hole sealing ring (15) and the second hole sealing ring (17), and the second throttling hole (3-2) is positioned below the first hole sealing ring (15) and communicated with the first throttling hole (3-1); the first hole on the piston (3) is communicated with the rod cavity oil port (5-2) through the first throttle hole (3-1) after the first hole moves beyond the rod cavity oil port (5-2) through the sealing ring (15).

2. The hydraulic cylinder capable of accurately controlling the buffering performance according to claim 1, wherein the guide sleeve (6) is provided with a first O-shaped ring (10), a second O-shaped ring (13) and an O-shaped ring retainer ring (14), the guide sleeve (6) is internally provided with a shaft sealing ring (9), a Stent seal (12) and a dust ring (8), the guide sleeve (6) is internally provided with a guide ring (11), and the piston (3) is internally provided with a third O-shaped ring (16).