CN217873533U

CN217873533U - Mechanical shock absorption buffer structure for hydraulic cylinder

Info

Publication number: CN217873533U
Application number: CN202221983689.0U
Authority: CN
Inventors: 郭彦斌; 张强; 孙朗朗; 陈希
Original assignee: Xuzhou XCMG Hydraulics Co Ltd
Current assignee: Xuzhou XCMG Hydraulics Co Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-11-22
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a mechanical shock absorption buffer structure for a hydraulic cylinder; the device comprises a guide sleeve, a cylinder barrel, a piston rod, a T-shaped support, a spring and a piston; the guide sleeve is arranged on the cylinder barrel through a bolt; the piston rod is connected with the cylinder barrel in a sliding manner through the guide sleeve; the spring penetrates through the right end of the piston rod; the piston rod is provided with a T-shaped support; a groove is formed in the left end face of the piston; the right end of the spring is placed in the piston groove, and the left end of the spring is positioned by the T-shaped support; compared with hydraulic throttling buffering, the hydraulic throttling buffering structure has the advantages that instantaneous pressure increase is avoided during buffering, and the service lives of a hydraulic cylinder base body and a sealing piece can be prolonged; compared with hydraulic throttling buffering, the hydraulic throttling buffering device has the advantages of no processing requirement of a static clearance, simple structure and low cost.

Description

Mechanical shock absorption buffer structure for hydraulic cylinder

Technical Field

The utility model relates to a mechanical type shock attenuation buffer structure for pneumatic cylinder belongs to hydraulic cylinder technical field.

Background

The hydraulic cylinder piston rod speed generally all can set up buffering damping device under the very fast condition of functioning speed. At present, the buffering devices at home and abroad generally achieve the buffering purpose by generating a throttling effect through hydraulic oil. However, throttling buffering has two significant disadvantages:

1. the oil pressure in the buffer area is increased, and the service life of the structural base body and the sealing element is influenced.

2. The processing and control difficulty of the buffer gap is large.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides a mechanical shock absorption buffer structure for a hydraulic cylinder, which can not bring instantaneous pressure increase during buffering relative to hydraulic throttling buffering, and can prolong the service life of a hydraulic cylinder base body and a sealing element; compared with hydraulic throttling buffering, the hydraulic throttling buffering device has the advantages of no processing requirement of a static clearance, simple structure and low cost.

In order to realize the purpose, the utility model discloses a technical scheme is: a mechanical shock absorption buffer structure for a hydraulic cylinder comprises a guide sleeve, a cylinder barrel, a piston rod, a T-shaped support, a spring and a piston;

the guide sleeve is arranged on the cylinder barrel through a bolt;

the piston rod is connected with the cylinder barrel in a sliding manner through the guide sleeve;

the spring penetrates through the right end of the piston rod;

the piston rod is provided with a T-shaped support;

a groove is formed in the left end face of the piston;

the right end of the spring is placed in the piston groove, and the left end of the spring is positioned by the T-shaped support.

Furthermore, the T-shaped support is made of cast iron or copper.

Furthermore, a spiral oil groove is formed in an inner hole, matched with the piston rod, of the T-shaped support, and 6-8 gaps are formed in the periphery of the outer circle of the top of the support.

The beneficial effects of the utility model are that:

1. compared with hydraulic throttling buffering, the structure can not increase the pressure instantly when buffering, and can prolong the service life of the hydraulic cylinder base body and the sealing piece.

2. Compared with hydraulic throttling buffering, the hydraulic throttling buffering device has the advantages of no processing requirement of a static clearance, simple structure and low cost.

Drawings

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

in the figure: 1. a guide sleeve; 2. a cylinder barrel; 3. a piston rod; 4. a T-shaped support; 5. a spring; 6. a piston; 7. and a spiral oil groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail through the accompanying drawings and embodiments. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.

As shown in fig. 1, a mechanical shock absorption buffer structure for a hydraulic cylinder comprises a guide sleeve 1, a cylinder barrel 2, a piston rod 3, a T-shaped support 4, a spring 5 and a piston 6; the guide sleeve 1 is arranged on the cylinder barrel 2 through a bolt; the piston rod 3 is connected with the cylinder barrel 2 in a sliding way through the guide sleeve 1; the spring 5 penetrates the right end of the piston rod 3; a T-shaped support 4 is arranged on the piston rod 3; a groove is arranged on the left end face of the piston 6; the right end of the spring 5 is placed in the piston groove, and the left end of the spring 5 is positioned by the T-shaped support 4; the T-shaped support 4 is made of cast iron or copper.

A spiral oil groove 7 is formed in an inner hole, matched with the piston rod, of the T-shaped support 4, and 6-8 gaps are formed in the periphery of the outer circle of the top of the support.

The piston rod 3 extends out under the action of oil pressure, when the stroke is nearly finished, the T-shaped support 4 is contacted with the guide sleeve 1 to compress the spring 5, and the kinetic energy of the piston rod 3 in the process of forward stroke is counteracted under the counter-acting force of the spring 5. At the moment, the piston rod 3 decelerates and continues to move forwards, the T-shaped support 4 moves relative to the piston rod 3, and the T-shaped support 4 is made of cast iron or aluminum bronze materials, and hydraulic oil is stored in an internal oil groove, so that the abrasion of the support is slowed down on the premise that the piston rod is protected from being scratched.

During the movement of the T-shaped support 4 relative to the piston rod 3, the hydraulic oil stored in the closed cavity between the support and the piston 6 is communicated with the external hydraulic oil through the gap A.

The mechanical buffer structure can be applied to occasions where the motion speed of the piston rod is high, the impact is required to be reduced at the tail end, and the work is frequent. The buffer device is suitable for working under the working condition that the requirement of accurate buffering is not required. The buffer does not bring instantaneous pressure increase, the service life of the hydraulic cylinder base body and the sealing element can be prolonged, the structure is simple, and the processing cost is lower.

Compared with hydraulic throttling buffering, the structure can not increase the pressure instantly when buffering, and can prolong the service life of the hydraulic cylinder base body and the sealing element; compared with hydraulic throttling buffering, the hydraulic throttling buffering device has the advantages of no processing requirement of a static clearance, simple structure and low cost.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, which is intended to cover any modifications, equivalent substitutions or improvements made within the spirit and scope of the present invention.

Claims

1. A mechanical shock absorption buffer structure for a hydraulic cylinder is characterized by comprising a guide sleeve (1), a cylinder barrel (2), a piston rod (3), a T-shaped support (4), a spring (5) and a piston (6);

the guide sleeve (1) is arranged on the cylinder barrel (2) through a bolt;

the piston rod (3) is connected with the cylinder barrel (2) in a sliding manner through the guide sleeve (1);

the spring (5) penetrates into the right end of the piston rod (3);

the piston rod (3) is provided with a T-shaped support (4);

a groove is formed in the left end face of the piston (6);

the right end of the spring (5) is placed in a groove of the piston (6), and the left end of the spring (5) is positioned by the T-shaped support (4).

2. The mechanical shock absorption and buffering structure for the hydraulic cylinder as claimed in claim 1, wherein the T-shaped support (4) is made of cast iron or copper.

3. The mechanical shock absorption and buffering structure for the hydraulic cylinder as claimed in claim 2, wherein a screw oil groove (7) is formed in an inner hole where the T-shaped support (4) is matched with the piston rod, and 6-8 gaps are formed in one circle of the outer circle of the top of the support.