CN209959609U

CN209959609U - Buffer structure of oil cylinder

Info

Publication number: CN209959609U
Application number: CN201920502021.1U
Authority: CN
Inventors: 汪立平; 刘洁琼; 袁飞; 刘国敏; 王碧坤; 魏春冲
Original assignee: Jiangsu Hengli Hydraulic Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Co Ltd
Priority date: 2019-04-15
Filing date: 2019-04-15
Publication date: 2020-01-17
Anticipated expiration: 2029-04-15

Abstract

The utility model discloses a buffer structure of hydro-cylinder, including cylinder, cylinder bottom and the piston rod of setting in the cylinder, be equipped with back cushion collar and nut on the tip of piston rod in proper order, back cushion collar movable sleeve is established on the piston rod and is controlled about on the piston rod by oil pressure power, the right side of back cushion collar is located to the nut and drops from the piston rod with restriction back cushion collar. In this way, the utility model discloses the buffer structure of hydro-cylinder can simplify the locate mode of back cushion collar, simple structure, long service life, safe and reliable.

Description

Buffer structure of oil cylinder

Technical Field

The utility model relates to a hydro-cylinder field especially relates to a buffer structure of hydro-cylinder.

Background

The excavator oil cylinder has the characteristics of severe working environment, complex working condition, frequent actuation, large load, high running speed and the like. In order to avoid the strong impact of the oil cylinder at the stroke end and ensure the stable operation of the system, the requirement on the rear buffer is usually higher. The rear buffer part of the oil cylinder is most prone to failure, so that the buffer effect is poor, and the normal operation of the oil cylinder is influenced.

The rear buffering structure commonly used at present comprises a clamping ring, a rear buffering sleeve, a buffering ring and a baffle ring. When the rear buffer sleeve performs buffering, oil is mainly released through a gap between the cylinder bottom and the rear buffer sleeve, a flat wire on the rear buffer sleeve and an opening of the buffer ring. Because the structure contains more parts, the influence factors on the buffering effect are increased correspondingly, and the failure modes are increased correspondingly. The failure modes mainly comprise the falling of the clamping ring, the expansion deformation of the buffer sleeve, the breakage of the baffle ring and the like. Therefore, in order to reduce the occurrence of failure and ensure the normal operation of the oil cylinder, the optimization of the rear buffer structure form is necessary.

Disclosure of Invention

The utility model discloses the main technical problem who solves provides a buffer structure of hydro-cylinder, can simplify the locate mode of back cushion collar, simple structure, long service life, safe and reliable.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a buffer structure of hydro-cylinder, includes cylinder, the cylinder bottom and sets up the piston rod in the cylinder, be equipped with back cushion collar and nut on the tip of piston rod in proper order, back cushion collar activity cover is established on the piston rod and is controlled on the piston rod by the hydraulic pressure power and move, the nut is located the right side of back cushion collar and is come off from the piston rod in order to restrict the back cushion collar.

In a preferred embodiment of the present invention, the rear cushion cover moves to the right to make the right end face of the rear cushion cover fit with the left end face of the nut.

In a preferred embodiment of the present invention, the rear cushion cover has at least one flat wire, and the flat wire has a pressure relief hole.

In a preferred embodiment of the present invention, a buffer hole is provided in the cylinder bottom, the rear buffer sleeve enters the cylinder bottom to form a gap between the outer surface of the rear buffer sleeve and the cylinder bottom, and the gap, the flat wire and the pressure relief hole form an oil passage.

In a preferred embodiment of the present invention, the rear cushion cover has a smaller outer diameter from left to right.

In a preferred embodiment of the present invention, the right end of the piston rod has a first step structure and a second step structure, the rear cushion sleeve is disposed on the first step structure, the nut is tightly connected to the second step structure, and the first step structure is higher than the second step structure.

The utility model has the advantages that: the utility model discloses the buffer structure of hydro-cylinder can simplify the locate mode of back cushion collar, simple structure, long service life, safe and reliable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic structural view of a preferred embodiment of a buffer structure of an oil cylinder of the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

the parts in the drawings are numbered as follows: 1. the cylinder barrel, 2, the cylinder bottom, 3, the piston rod, 4, the back cushion collar, 5, the nut, 6, the flat wire, 7, the pressure relief hole, 8, the cushion hole, 9, the first step structure, 10, the second step structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, a buffering structure of an oil cylinder includes a cylinder barrel 1, a cylinder bottom 2 and a piston rod 3 disposed in the cylinder barrel 1, a rear buffering sleeve 4 and a nut 5 are sequentially disposed on an end portion of the piston rod 3, the rear buffering sleeve 4 is movably sleeved on the piston rod 3 and moves left and right on the piston rod 3 under oil pressure, and the nut 5 is disposed on a right side of the rear buffering sleeve 4 to limit the rear buffering sleeve 4 from falling off the piston rod 3.

In addition, the rear cushion cover 4 moves rightward so that the right end surface thereof is fitted to the left end surface of the nut 5.

In addition, the rear buffer sleeve 4 is provided with at least one flat wire 6, the flat wire 6 is provided with a pressure relief hole 7, and the pressure relief hole 7 is formed in the flat wire 6, so that the positioning and the processing are convenient.

In addition, a buffer hole 8 is formed in the cylinder bottom 2, when the rear buffer sleeve 4 enters the buffer hole 8, the rear buffer sleeve 4 is attached to the end face of the nut 5 under the action of oil pressure, the rear buffer sleeve 4 enters the cylinder bottom 2, so that a gap is formed between the outer surface of the rear buffer sleeve 4 and the cylinder bottom 2, and the gap, the flat wire 6 and the pressure relief hole 7 form an oil liquid passage for pressure relief.

In addition, the rear cushion cover 4 has an outer diameter gradually decreasing from left to right.

In addition, the right-hand member of piston rod 3 has first stair structure 9 and second stair structure 10, and back cushion collar 4 is established on first stair structure 9, and nut 5 fastening connection is on second stair structure 10, and first stair structure 9 is higher than second stair structure 10.

Be different from prior art, the utility model discloses the buffer structure of hydro-cylinder changes the location form of back cushion collar into fixation nut location by keeping off the ring location, and current buffer structure keeps off the ring location for the use, and a deep trouth has been processed on the back cushion collar, and this leads to the terminal wall thickness of back cushion collar very thin, meets the abominable operating mode and takes place to warp very easily, influences the buffering effect. The utility model provides a buffer structure of hydro-cylinder has cancelled the deep groove, has increased the terminal wall thickness of back cushion collar, has reduced the probability that takes place to warp.

The size of the opening of the buffer ring in the original structure is difficult to control, and the openings of the buffer rings in the same batch cannot be guaranteed to be completely the same. The optimized structure cancels a buffer ring, and is changed into a structure for releasing pressure through a pressure release hole, the size of the hole diameter can be accurately controlled by the pressure release hole, and the stable control of the buffer effect of the oil cylinders in the same batch is realized; the clamping ring and the baffle ring in the original structure are eliminated, the factors influencing the buffering effect are reduced, and the probability of failure occurrence is reduced.

The utility model discloses the buffer structure of hydro-cylinder can simplify the locate mode of back cushion collar, simple structure, long service life, safe and reliable.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.

Claims

1. The utility model provides a buffer structure of hydro-cylinder, includes cylinder, the cylinder bottom and sets up the piston rod in the cylinder, its characterized in that, be equipped with back cushion collar and nut on the tip of piston rod in proper order, back cushion collar movable sleeve is established on the piston rod and is controlled on the piston rod by the hydraulic pressure and move, the nut is located the right side of back cushion collar and is come off from the piston rod in order to restrict the back cushion collar.

2. The buffer structure of the oil cylinder as claimed in claim 1, wherein the rear buffer sleeve moves rightwards to make the right end surface of the rear buffer sleeve fit with the left end surface of the nut.

3. The buffer structure of the oil cylinder according to claim 1 or 2, wherein the rear buffer sleeve is provided with at least one flat wire, and the flat wire is provided with a pressure relief hole.

4. The buffer structure of the oil cylinder according to claim 3, wherein a buffer hole is arranged in the cylinder bottom, the rear buffer sleeve enters the cylinder bottom to enable a gap to be formed between the outer surface of the rear buffer sleeve and the cylinder bottom, and the gap, the flat wire and the pressure relief hole form an oil passage.

5. The buffer structure of the oil cylinder as claimed in claim 4, wherein the outer diameter of the rear buffer sleeve is gradually reduced from left to right.

6. The buffer structure of the oil cylinder as claimed in claim 5, wherein the right end of the piston rod is provided with a first step structure and a second step structure, the rear buffer sleeve is sleeved on the first step structure, the nut is tightly connected on the second step structure, and the first step structure is higher than the second step structure.