CN210240178U - Piston rod buffer device - Google Patents

Abstract

The utility model relates to a piston rod buffer device, which comprises a piston rod and a cylinder bottom; a buffer cavity is arranged on the cylinder bottom; a piston is sleeved on the piston rod, a bearing sleeve and a spacing ring are sequentially sleeved on the side wall of the front end of the piston rod, and one side end face of the bearing sleeve is abutted to one side end face of the spacing ring; an annular groove is arranged at the front end of the spacer ring and close to the front end face of the piston rod, an elastic check ring is arranged in the annular groove, and the end face of the elastic check ring is abutted against the end face of the other side of the spacer ring; the outer diameter of the bearing sleeve is larger than that of the space ring, and the outer diameter of the space ring is larger than that of the elastic retainer ring; when the piston rod enters the cavity of the buffer cavity, the spacer ring and the bearing sleeve are abutted against the inner wall of the buffer cavity in sequence; the piston rod is provided with the space ring to play a primary buffering role, the bearing sleeve is arranged to play a secondary buffering role, and the elastic retainer ring is arranged to facilitate the replacement of the bearing sleeve and the space ring component; the buffer of piston rod can be realized, the change of part can be made things convenient for again.

Description

Piston rod buffer device

Technical Field

The utility model relates to a buffer specifically is a piston rod buffer.

Background

The piston rod is the device that will get into the outer device of cylinder bottom buffer chamber oil discharge to the cylinder bottom, as shown in figure 1, old-fashioned buffering form is the fixed buffering step of piston rod, gets into the cylinder bottom buffer chamber, if pull in the use, changes spare part and need change whole piston rod, and the cost is higher, how can provide a change more convenient, the low buffer device of cost of maintenance becomes the problem that the researcher of this company urgently needed to solve.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: how to provide a buffer device which is convenient to replace and low in maintenance cost;

in order to solve the above problem, the utility model adopts the following scheme:

the utility model relates to a piston rod buffer device, which comprises a piston rod and a cylinder bottom;

a buffer cavity is arranged on the cylinder bottom;

the buffer cavity is used for discharging oil entering the cylinder bottom out of the cylinder bottom through the movement of the piston rod.

The piston rod is sleeved with a piston, a bearing sleeve and a spacing ring are sequentially sleeved on the side wall of the front end of the piston rod, and one side end face of the bearing sleeve is abutted to one side end face of the spacing ring;

the piston is closely attached to the wall of the stroke cavity and used for discharging oil out of the cylinder body, one end of the bearing sleeve abuts against the space ring, and the other end of the bearing sleeve abuts against the side wall of the step of the piston rod.

An annular groove is formed in the position, close to the front end face of the piston rod, of the front end of the space ring, an elastic check ring is arranged in the annular groove, and the end face of the elastic check ring abuts against the end face of the other side of the space ring;

a circlip is arranged in the annular groove and abuts against the end face of the spacer ring, namely the circlip is arranged in the annular groove, and the spacer ring and the bearing sleeve are sequentially arranged between the circlip and the side wall of the step of the piston rod, so that the spacer ring and the bearing sleeve are fixed on the piston rod.

The outer diameter of the bearing sleeve is larger than that of the space ring, and the outer diameter of the space ring is larger than that of the elastic retainer ring;

that is to say, when the piston rod moved, the circlip that is used for fixed spacer, bearing housing can not contact with the cushion chamber inner wall, and the spacer firstly contacts with cushion chamber inner wall and plays the cushioning effect, and secondly the great bearing housing of internal diameter plays the effect of secondary buffering to avoid the piston rod to pull in the motion process.

In addition, when the spacer ring or the bearing sleeve part needs to be replaced, the elastic check ring in the annular groove is taken out, and the spacer ring or the bearing sleeve is taken out along the axial direction of the piston rod to be conveniently replaced.

When the piston rod enters the cavity of the buffer cavity, the spacer ring and the bearing sleeve are abutted against the inner wall of the buffer cavity in sequence.

The utility model has the advantages that the piston rod buffering device has the advantages that the spacing ring is arranged on the piston rod to play a primary buffering role, the bearing sleeve is arranged to play a secondary buffering role, and the elastic retaining ring is arranged to facilitate the replacement of the bearing sleeve and the spacing ring component; the buffer of piston rod can be realized, the change of part can be made things convenient for again.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic view of a conventional piston rod construction;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is an enlarged view of the utility model at A;

in the figure: 1-piston rod, 2-piston, 3-cylinder bottom, 4-bearing sleeve, 5-spacer ring, 6-elastic retainer ring and 7-buffer cavity.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 2, the utility model relates to a piston rod buffering device, which comprises a piston rod 1 and a cylinder bottom 2;

the cylinder bottom 2 is provided with a buffer cavity 7;

the buffer cavity is used for discharging oil entering the cylinder bottom out of the cylinder bottom through the movement of the piston rod.

As shown in fig. 3, a piston 3 is sleeved on a piston rod 1, a bearing sleeve 4 and a space ring 5 are sequentially sleeved on the side wall of the front end of the piston rod 1, and one side end face of the bearing sleeve 4 is abutted against one side end face of the space ring 5;

the piston is closely attached to the wall of the stroke cavity and used for discharging oil out of the cylinder body, one end of the bearing sleeve abuts against the space ring, and the other end of the bearing sleeve abuts against the side wall of the step of the piston rod.

An annular groove is arranged at the front end of the spacer ring 5 and close to the front end face of the piston rod 1, an elastic check ring 6 is arranged in the annular groove, and the end face of the elastic check ring 6 abuts against the end face of the other side of the spacer ring 5;

a circlip is arranged in the annular groove and abuts against the end face of the spacer ring, namely the circlip is arranged in the annular groove, and the spacer ring and the bearing sleeve are sequentially arranged between the circlip and the side wall of the step of the piston rod, so that the spacer ring and the bearing sleeve are fixed on the piston rod.

The outer diameter of the bearing sleeve 4 is larger than that of the space ring 5, and the outer diameter of the space ring 5 is larger than that of the elastic retainer ring 6;

that is to say, when the piston rod moved, the circlip that is used for fixed spacer, bearing housing can not contact with the cushion chamber inner wall, and the spacer firstly contacts with cushion chamber inner wall and plays the cushioning effect, and secondly the great bearing housing of internal diameter plays the effect of secondary buffering to avoid the piston rod to pull in the motion process.

In addition, when the spacer ring or the bearing sleeve part needs to be replaced, the elastic check ring in the annular groove is taken out, and the spacer ring or the bearing sleeve is taken out along the axial direction of the piston rod to be conveniently replaced.

When the piston rod 1 enters the cavity of the buffer cavity 7, the spacer ring 5 and the bearing sleeve 4 are abutted against the inner wall of the buffer cavity 7 in sequence.

The utility model relates to a piston rod buffering device, which is characterized in that a space ring is arranged on a piston rod to play a primary buffering role, a bearing sleeve is arranged to play a secondary buffering role, and an elastic retainer ring is arranged to facilitate the replacement of the bearing sleeve and the space ring component; the buffer of piston rod can be realized, the change of part can be made things convenient for again.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (1)

1. A piston rod buffer device is characterized in that: comprises a piston rod and a cylinder bottom;

a buffer cavity is arranged on the cylinder bottom;

the piston rod is sleeved with a piston, a bearing sleeve and a spacing ring are sequentially sleeved on the side wall of the front end of the piston rod, and one side end face of the bearing sleeve is abutted to one side end face of the spacing ring;

an annular groove is formed in the position, close to the front end face of the piston rod, of the front end of the space ring, an elastic check ring is arranged in the annular groove, and the end face of the elastic check ring abuts against the end face of the other side of the space ring;

the outer diameter of the bearing sleeve is larger than that of the space ring, and the outer diameter of the space ring is larger than that of the elastic retainer ring;

when the piston rod enters the cavity of the buffer cavity, the spacer ring and the bearing sleeve are abutted against the inner wall of the buffer cavity in sequence.

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