CN217381115U

CN217381115U - Buffer structure for hollow rod oil cylinder

Info

Publication number: CN217381115U
Application number: CN202220998896.7U
Authority: CN
Inventors: 张金枝; 吴琼; 吴日委
Original assignee: Xiamen Yinhua Machinery Co ltd
Current assignee: Xiamen Yinhua Machinery Co ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-09-06
Anticipated expiration: 2032-04-27

Abstract

A buffer structure for a hollow rod oil cylinder comprises a hollow piston rod, a piston, a buffer pin, a spring, a gasket and a cylinder bottom which are matched with each other; wherein, the piston is arranged in the hollow piston rod, and a channel formed in the middle of the piston is communicated with the inner cavity of the hollow piston rod; the cylinder bottom is provided with a step-shaped buffer hole, a buffer pin is fixed at the tail end of the piston, the head end of the buffer pin extends into the buffer hole, and a through hole formed in the middle of the buffer pin is communicated with a channel in the middle of the piston; the fixed gasket and the spring are sleeved in the buffer pin, the spring is fixed between the tail end face of the piston and the fixed gasket, and the outer end face of the fixed gasket is matched with the stepped face of the buffer hole for limiting, so that the problem of impact generated when the piston rod is contracted in place is solved; meanwhile, the required buffer stroke can be adjusted by adjusting the lengths of the buffer pin and the spring and the related size of the matched cylinder bottom according to actual requirements.

Description

Buffer structure for hollow rod oil cylinder

The technical field is as follows:

the utility model belongs to hydraulic cylinder buffer structure relates to a novel buffer gear's of empty core rod hydro-cylinder design, is particularly suitable for lift cylinder bottom end buffer adjustment's correlation structure.

Background art:

at present, in engineering machinery products, due to continuous upgrading of the products, the requirements on a hydraulic system are higher and higher. For example, in the case of sanitation machines, the working mechanism is required to be smooth and impact-free due to the working property, which requires a hydraulic cylinder on the working mechanism to have a good damping effect. When the piston rod drives the piston to move to the bottom end of the cylinder by means of self-weight when the piston rod finishes the stroke, the piston rod has great kinetic energy, and when the piston rod is contracted in place, great impact force can be generated, so that the piston in the oil cylinder is easy to fall off or a structural member for supporting the oil cylinder is damaged, and the service life of the oil cylinder is greatly shortened.

The utility model has the following contents:

in view of the above problems in the prior art, an object of the present invention is to provide a novel buffer mechanism for an air-core rod cylinder, which is suitable for a hydraulic cylinder through which oil can be introduced into an air-core rod inner cavity, and has a compact structure and convenient operation.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a buffer structure for a hollow rod oil cylinder comprises a hollow piston rod, a piston, a buffer pin, a spring, a gasket and a cylinder bottom which are matched with each other; wherein, the piston is arranged in the hollow piston rod, and a channel formed in the middle of the piston is communicated with the inner cavity of the hollow piston rod; the cylinder bottom is provided with a step-shaped buffer hole, a buffer pin is fixed at the tail end of the piston, the head end of the buffer pin extends into the buffer hole, and a through hole formed in the middle of the buffer pin is communicated with a channel in the middle of the piston; the fixed gasket and the spring are sleeved in the buffer pin, the spring is fixed between the tail end face of the piston and the fixed gasket, and the outer end face of the fixed gasket is matched with the stepped face of the buffer hole for limiting.

Further, the outer end of the buffer pin extends outwards to form a step-shaped end face.

Furthermore, an elliptical sealing ring is arranged at the matching position of the piston and the buffer pin.

By adopting the technical scheme, the utility model adopts a novel buffer structure to solve the problem of impact generated when the piston rod is contracted in place; meanwhile, the required buffer stroke can be adjusted by adjusting the lengths of the buffer pin and the spring and the relevant size of the matched cylinder bottom according to actual requirements.

Description of the drawings:

the invention is described in detail below with reference to the accompanying drawings:

FIG. 1 is a schematic view of a buffering structure at the bottom end of a cylinder of the present invention;

fig. 2 is the schematic diagram of the structure of the hollow rod cylinder of the present invention.

The specific implementation mode is as follows:

the following detailed description of the present invention is made with reference to the accompanying drawings and examples:

fig. 1 and fig. 2 show a buffering structure for a hollow rod cylinder, which is an embodiment of the present invention, and includes a hollow piston rod 1, a piston 2, a buffering pin 3, a spring 4, a gasket 5, and a cylinder bottom 6, which are mutually engaged; wherein, the piston 2 is arranged in the hollow piston rod 1, and a channel 21 formed in the middle of the piston 2 is communicated with the inner cavity of the hollow piston rod 1; the cylinder bottom 5 is provided with a step-shaped buffer hole 61, the buffer pin 3 is fixed at the tail end of the piston 2, the end of the buffer pin extends into the buffer hole 61, and a through hole 31 formed in the middle of the buffer pin 3 is communicated with a channel 21 in the middle of the piston 2; the fixed gasket 5 and the spring 4 are sleeved in the buffer pin 3, the top of the spring 4 is arranged between the tail end face of the piston 2 and the fixed gasket 5, and the outer end face of the fixed gasket 5 is matched and limited with the step face of the buffer hole 61.

Further, the outer end of the buffer pin 3 extends outward to form a step-shaped end surface 32. An elliptic sealing ring 7 is arranged at the matching part of the piston 2 and the buffer pin 3.

During installation, after the piston is installed in the piston rod, the fixing gasket and the spring are sequentially installed in the buffer pin, and finally the installed buffer pin is screwed into the piston.

The working principle is that when the piston rod drives the piston and the installed buffering structure to contract to a position close to the cylinder bottom, the hollow buffering pin firstly enters the buffering hole at the cylinder bottom, the descending speed of the piston rod is slowed down due to the change of the oil passing area, and when the piston collides with the cylinder bottom, no impact force is generated, so that the service life of the oil cylinder is protected.

The utility model adopts a novel buffer structure to solve the impact problem generated when the piston rod is contracted in place; meanwhile, the required buffer stroke can be adjusted by adjusting the lengths of the buffer pin and the spring and the relevant size of the matched cylinder bottom according to actual requirements.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a buffer structure for hollow rod hydro-cylinder which characterized in that: the device comprises a hollow piston rod, a piston, a buffer pin, a spring, a gasket and a cylinder bottom which are matched with each other; wherein, the piston is arranged in the hollow piston rod, and a channel formed in the middle of the piston is communicated with the inner cavity of the hollow piston rod; the cylinder bottom is provided with a step-shaped buffer hole, a buffer pin is fixed at the tail end of the piston, the head end of the buffer pin extends into the buffer hole, and a through hole formed in the middle of the buffer pin is communicated with a channel in the middle of the piston; the fixed gasket and the spring are sleeved in the buffer pin, the spring is fixed between the tail end face of the piston and the fixed gasket, and the outer end face of the fixed gasket is matched with the stepped face of the buffer hole for limiting.

2. The cushion structure for the hollow rod cylinder according to claim 1, wherein: the outer end of the buffer pin extends outwards to form a step-shaped end face.

3. A cushion structure for a hollow rod cylinder as claimed in claim 1 or 2, wherein: an elliptic sealing ring is arranged at the matching position of the piston and the buffer pin.