阅读说明：本技术 一种新型弹簧缓冲装置的液压缸 (Novel spring buffering device ) 是由 贺湘宇 谭丽莎 肖广鑫 胡薜礼 于 2019-10-25 设计创作，主要内容包括：本发明提供一种新型弹簧缓冲装置的液压缸,包括液压缸、缓冲装置；所述液压缸包括缸底、缸筒、空心活塞杆、缸盖、第一油口、紧固六角螺母、活塞、第二油口、导向套；所述缓冲装置包括缓冲缸底、缓冲缸筒、缓冲缸盖、缓冲活塞、缓冲弹簧。本发明能够部分或全部吸收液压缸运动所产生的冲击能量。(The invention provides a hydraulic cylinder of a novel spring buffer device, which comprises a hydraulic cylinder and a buffer device; the hydraulic cylinder comprises a cylinder bottom, a cylinder barrel, a hollow piston rod, a cylinder cover, a first oil port, a fastening hexagon nut, a piston, a second oil port and a guide sleeve; the buffer device comprises a buffer cylinder bottom, a buffer cylinder barrel, a buffer cylinder cover, a buffer piston and a buffer spring. The invention can partially or completely absorb the impact energy generated by the movement of the hydraulic cylinder.)

1. The utility model provides a novel spring buffering device's pneumatic cylinder which characterized in that: comprises a hydraulic cylinder (10) and a buffer device (20);

the hydraulic cylinder (10) comprises a cylinder bottom (11), a cylinder barrel (12), a hollow piston rod (13), a cylinder cover (14), a first oil port (15), a fastening hexagon nut (16), a piston (17), a second oil port (18) and a guide sleeve (19); the piston (17) is mounted on the hollow piston rod (13) by a fastening hexagonal nut (16); the cylinder bottom (11), the cylinder barrel (12) and the cylinder cover (14) are sequentially connected to form a hydraulic cylinder cavity, and the guide sleeve (19) is fixed inside the hydraulic cylinder cavity, abuts against the cylinder cover (14) and is used for supporting the hollow piston rod (13); the piston (17) can freely slide in the hydraulic cylinder cavity and push the hollow piston rod (13) to extend out of or retract into the hydraulic cylinder cavity along the guide sleeve (19) and the cylinder cover (14);

the buffer device (20) comprises a buffer cylinder bottom (21), a buffer cylinder barrel (22), a buffer cylinder cover (23), a buffer piston (24) and a buffer spring (25); the buffer cylinder bottom (21), the buffer cylinder barrel (22) and the buffer cylinder cover (23) are sequentially connected to form a buffer cavity; the buffer piston (24) can freely slide in the buffer cavity; the buffer spring (25) is arranged in the buffer cavity and is respectively connected with the buffer piston (24) and the buffer cylinder cover (23);

the hollow piston rod (13) in the hydraulic cylinder (10) is connected with the buffer cylinder bottom (21) in the buffer device (20) through threads.

2. The hydraulic cylinder of the novel spring buffer device as claimed in claim 1, wherein: the buffer spring (25) can adopt a high-strength spring.

3. The hydraulic cylinder of the novel spring buffer device as claimed in claim 1, wherein: the buffer spring (25) can adopt a nitrogen spring.

Technical Field

The invention relates to a hydraulic cylinder, in particular to a hydraulic cylinder of a novel spring buffer device.

Background

The hydraulic cylinder is an important linear executing element in a hydraulic transmission system and mainly comprises a piston, a piston rod, a cylinder barrel, a cylinder cover and other parts. When the hydraulic cylinder drives the component with larger mass to do rapid reciprocating motion, the moving component has great kinetic energy. Therefore, when the piston moves to the end of the hydraulic cylinder, it collides with the cylinder head, and shock and noise are generated. Such mechanical impact not only can cause damage to the hydraulic cylinder itself, but can also cause damage to other connected mechanical components.

In order to reduce or even completely absorb the harmful impact, the invention designs a novel hydraulic cylinder of a spring buffering device. When the piston moves to the end part of the hydraulic cylinder, the piston can extrude hydraulic oil at the end part of the hydraulic cylinder, and the part of the hydraulic oil flows into the buffering cylinder through the oil passage in the piston rod and acts on a buffering cylinder spring connected with the piston of the buffering cylinder to absorb part or all of impact energy.

Disclosure of Invention

The utility model provides a novel spring buffering device's pneumatic cylinder which characterized in that: comprises a hydraulic cylinder and a buffer device; the hydraulic cylinder comprises a cylinder bottom, a cylinder barrel, a hollow piston rod, a cylinder cover, a first oil port, a fastening hexagon nut, a piston, a second oil port and a guide sleeve; the piston is mounted on the hollow piston rod through a fastening hexagon nut; the cylinder bottom, the cylinder barrel and the cylinder cover are sequentially connected to form a hydraulic cylinder cavity, and the guide sleeve is fixed inside the hydraulic cylinder cavity, abuts against the cylinder cover and is used for supporting the hollow piston rod; the piston can freely slide in the hydraulic cylinder cavity and push the hollow piston rod to extend out of or retract into the hydraulic cylinder cavity along the guide sleeve and the cylinder cover; the buffer device comprises a buffer cylinder bottom, a buffer cylinder barrel, a buffer cylinder cover, a buffer piston and a buffer spring; the buffer cylinder bottom, the buffer cylinder barrel and the buffer cylinder cover are sequentially connected to form a buffer cavity; the buffer piston can freely slide in the buffer cavity; the buffer spring is arranged in the buffer cavity and is respectively connected with the buffer piston and the buffer cylinder cover; the hollow piston rod in the hydraulic cylinder is connected with the bottom of the buffer cylinder in the buffer device through threads.

Preferably, the buffer spring may be a high-strength spring.

Preferably, the buffer spring may be a nitrogen spring.

Other aspects, objects, and advantages of the invention will become apparent from the following description taken in conjunction with the accompanying drawings.

Drawings

Fig. 1 is a full sectional view of the present invention.

Figure 2 is a schematic view of the chamber of the present invention.

The reference numbers are as follows:

10-a hydraulic cylinder; 11-cylinder bottom; 12-a cylinder barrel; 13-a hollow piston rod; 14-a cylinder cover; 15-a first oil port; 16-fastening a hexagon nut; 17-a piston; 18-a second oil port; 19-a guide sleeve; 20-a buffer device; 21-buffer cylinder bottom; 22-a buffer cylinder; 23-buffering the cylinder cover; 24-a buffer piston; 25-a buffer spring; 41-rodless cavity of the hydraulic cylinder; 42-the hydraulic cylinder has a rod cavity; 43-hollow piston rod oil duct; 44-a buffer oil chamber; 45-buffer spring chamber.

Detailed Description

As shown in fig. 1, a hydraulic cylinder of a novel spring buffer device comprises a hydraulic cylinder 10 and a buffer device 20; the hydraulic cylinder comprises a cylinder bottom 11, a cylinder barrel 12, a hollow piston rod 13, a cylinder cover 14, a first oil port 15, a fastening hexagon nut 16, a piston 17, a second oil port 18 and a guide sleeve 19; the piston 17 is mounted on the hollow piston rod 13 by tightening a hexagonal nut 16; the cylinder bottom 11, the cylinder barrel 12 and the cylinder cover 14 are sequentially connected to form a hydraulic cylinder cavity, and the guide sleeve 19 is fixed inside the hydraulic cylinder cavity, abuts against the cylinder cover 14 and is used for supporting the hollow piston rod 13; the piston 17 can freely slide in the hydraulic cylinder cavity and push the hollow piston rod 13 to extend out of or retract into the hydraulic cylinder cavity along the guide sleeve 19 and the cylinder cover 14; the buffer device 20 comprises a buffer cylinder bottom 21, a buffer cylinder 22, a buffer cylinder cover 23, a buffer piston 24 and a buffer spring 25; the buffer cylinder bottom 21, the buffer cylinder barrel 22 and the buffer cylinder cover 23 are sequentially connected to form a buffer cavity; the buffer piston 24 can slide freely in the buffer cavity; the buffer spring 25 is arranged in the buffer cavity and is respectively connected with the buffer piston 24 and the buffer cylinder cover 23; the hollow piston rod 13 in the hydraulic cylinder 10 is connected with the buffer cylinder bottom 21 in the buffer device 20 through threads.

The buffer spring 25 may be a high-strength spring.

The buffer spring 25 may be a nitrogen spring.

As shown in fig. 2, the specific working principle of the present invention is described as follows:

firstly, the first oil port 15 and the second oil port 18 are closed simultaneously, hydraulic oil enters a hydraulic cylinder rod cavity 42 of the hydraulic cylinder 10 through the second oil port 18, the piston 17 and the hollow piston rod 13 are pushed to move towards a hydraulic cylinder rodless cavity 41 together, and the hydraulic oil in the hydraulic cylinder rodless cavity 41 flows out of the hydraulic cylinder through the first oil port 15;

in the second step, when the piston 17 and the hollow piston rod 13 move together to approach the end of the cylinder bottom 11, the first oil port 15 and the second oil port 18 are simultaneously closed;

thirdly, the piston 17 and the hollow piston rod 13 continue to move due to inertia, and the extrusion hydraulic oil enters the buffer oil cavity 44 through the hollow piston rod oil channel 43 to push the buffer piston 24 to move towards the buffer spring cavity 45, so as to compress the buffer spring 25 and absorb the impact energy generated by the piston 17 and the hollow piston rod 13.