CN211259197U

CN211259197U - Buffer hydraulic oil cylinder

Info

Publication number: CN211259197U
Application number: CN201922301024.1U
Authority: CN
Inventors: 马华锦; 王开春; 程龙财
Original assignee: Jiangsu Lixueda Hydraulic Co ltd
Current assignee: Jiangsu Lixueda Hydraulic Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-08-14
Anticipated expiration: 2029-12-19

Abstract

The utility model relates to a hydraulic cylinder field, in particular to buffer hydraulic cylinder. The cylinder body, the cylinder body is the cavity tube-shape, and one end seal mounting has the gland, and the other end welding has the cylinder bottom, the inside piston rod that is equipped with of cylinder body, the gland inboard is equipped with a set of lip seal that the lip is relative, the cylinder body lateral wall open have with have the first hydraulic fluid port of pole chamber UNICOM, the cylinder bottom be equipped with the second hydraulic fluid port of no pole chamber UNICOM, the gland be located have the pole chamber side still be equipped with the coaxial buffer spring of piston rod, the bottom that the cylinder body is located no pole chamber one side also is equipped with a buffer spring. The utility model discloses a buffer spring plays the cushioning effect for the device can obtain effectual buffering protection when the operation, prolongs this hydraulic cylinder's life. The sealing buffer block plays a role in sealing and buffering, hard contact between the piston rod and the gland and between the piston rod and the cylinder bottom is avoided, noise is reduced, and the service life of the device is prolonged.

Description

Buffer hydraulic oil cylinder

Technical Field

The utility model relates to a hydraulic cylinder field, in particular to buffer hydraulic cylinder.

Background

The hydraulic oil cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and makes linear reciprocating motion (or swinging motion). It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. The output force of the hydraulic oil cylinder is in direct proportion to the effective area of the piston and the pressure difference between the two sides of the piston; the hydraulic oil cylinder basically comprises a cylinder barrel, a cylinder cover, a piston rod, a sealing device, a buffering device and an exhaust device.

However, in a hydraulic transmission system, when the mass of a moving part is large and the moving speed is high, the moving part has a large momentum due to the inertia effect, and in a hydraulic oil cylinder, when a piston moves to the terminal end of a cylinder barrel, hard collision often occurs with an end cover or the bottom of the cylinder barrel, so that large impact and noise are generated, the mechanical precision is seriously affected, and even a destructive accident can be caused by long-term collision.

Disclosure of Invention

The utility model aims at overcoming the defect that prior art exists, provide one kind and have buffer function, and avoid piston and cylinder cap or the direct rigid contact in cylinder bottom, the buffer hydraulic cylinder of noise reduction.

Realize the utility model discloses the technical scheme of purpose is:

the utility model provides a buffer hydraulic cylinder, includes the cylinder body, the cylinder body is the cavity tube-shape, and one end seal mounting has the gland, and the other end welding has the cylinder bottom, the inside piston rod that is equipped with of cylinder body, the gland inboard is equipped with a set of lip seal that the lip is relative, the cylinder body lateral wall open have with have the first hydraulic fluid port of pole chamber UNICOM, the cylinder bottom be equipped with the second hydraulic fluid port of no pole chamber UNICOM, the gland be located have pole chamber side still be equipped with the coaxial buffer spring of piston rod, the bottom that the cylinder body is located no pole chamber one side also is equipped with a buffer spring.

Preferably, a circle of sealing buffer blocks are further arranged on the periphery of the pressing cover, which is located on the side of the rod cavity and is in contact with the cylinder body.

Preferably, the bottom of the cylinder body is also provided with a circle of sealing buffer blocks.

Preferably, the cross section of the sealing buffer block is C-shaped, one side of the gland and the cylinder bottom, which is positioned inside the hydraulic oil cylinder, is respectively provided with a circle of outwards-protruding platforms, and the sealing buffer block is clamped on the platforms by means of self elasticity.

Preferably, the buffer spring is fixed on the gland and the cylinder bottom by welding.

After the technical scheme is adopted, the utility model discloses following positive effect has:

(1) the utility model discloses a buffer spring plays the cushioning effect for the device can obtain effectual buffering protection when the operation, prolongs this hydraulic cylinder's life.

(2) The utility model discloses a sealed buffer block has played, and the effect of sealed and buffering has avoided the rigid contact of piston rod with gland and cylinder bottom, and noise abatement has also prolonged the life of device.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

Fig. 1 is an axial cross-sectional view of the present invention;

the reference number in the attached drawings is 1-cylinder body; 2-pressing the cover; 3-a piston rod; 4-lip-shaped sealing ring; 5-a first oil port; 6-a second oil port; 7-a buffer spring; 8-sealing the buffer block; 9-cylinder bottom; 10-a platform;

Detailed Description

(example 1)

See fig. 1, the utility model discloses have cylinder body 1, cylinder body 1 is the cavity tube-shape, and one end seal mounting has gland 2, and the other end welding has cylinder bottom 9, 1 inside piston rod 3 that is equipped with of cylinder body, 2 inboards of gland are equipped with a set of lip seal 4 that the lip is relative, 1 lateral wall of cylinder body open have with have the first hydraulic fluid port 5 of pole chamber UNICOM, cylinder bottom 9 be equipped with the second hydraulic fluid port 6 of no pole chamber UNICOM, gland 2 be located have the pole chamber side still be equipped with 3 coaxial buffer spring 7 of piston rod, the bottom that cylinder body 1 is located no pole chamber one side also is equipped with a buffer spring 7. The buffer spring 7 is fixed on the gland 2 and the cylinder bottom 9 through welding. The section of the sealing buffer block 8 is C-shaped, one side of the gland 2 and one side of the cylinder bottom 9, which are positioned inside the hydraulic oil cylinder, are respectively provided with a circle of outwards protruding platforms 10, and the sealing buffer block 8 is clamped on the platforms 10 by means of self elasticity.

The utility model discloses a theory of operation does:

when the hydraulic oil cylinder works, the buffer springs 7 on the gland 2 and the cylinder bottom 9 can play a role in buffering when the piston rod 3 reciprocates too close to the gland 2 and the cylinder bottom 9. When the inertia of the piston rod 3 is too large and is out of control, the piston rod does not make hard contact with the gland 2 or the cylinder bottom 9, the sealing buffer block 8 is used for buffering, the safety of equipment is protected, and the sealing buffer block 8 also plays a role in buffering.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A damping hydraulic oil cylinder is characterized in that: including cylinder body (1), cylinder body (1) is the cavity tube-shape, and one end seal mounting has gland (2), and the other end welding has cylinder bottom (9), cylinder body (1) inside is equipped with a piston rod (3), gland (2) inboard is equipped with a set of lip seal (4) that the lip is relative, cylinder body (1) lateral wall open have with first hydraulic fluid port (5) that have rod chamber UNICOM, cylinder bottom (9) be equipped with second hydraulic fluid port (6) that do not have rod chamber UNICOM, gland (2) be located have the rod chamber side still be equipped with coaxial buffer spring (7) of piston rod (3), the bottom that cylinder body (1) is located no rod chamber one side also is equipped with a buffer spring (7).

2. The buffer hydraulic cylinder according to claim 1, wherein: the gland (2) is positioned at the side of the rod cavity and is provided with a circle of sealing buffer blocks (8) in a circle contacting with the cylinder body (1).

3. A buffer hydraulic cylinder according to claim 1 or 2, characterised in that: the bottom of the cylinder body (1) is also provided with a circle of sealing buffer blocks (8).

4. A cushioned hydraulic ram as claimed in claim 3, wherein: the section of the sealing buffer block (8) is C-shaped, a circle of platform (10) protruding outwards is arranged on one side, located inside the hydraulic oil cylinder, of the gland (2) and the cylinder bottom (9), and the sealing buffer block (8) is clamped on the platform (10) by means of self elasticity.

5. The buffer hydraulic cylinder according to claim 1, wherein: the buffer spring (7) is fixed on the gland (2) and the cylinder bottom (9) through welding.