CN213176247U

CN213176247U - Floating buffering structure used on hydraulic cylinder

Info

Publication number: CN213176247U
Application number: CN202021024618.9U
Authority: CN
Inventors: 武裕; 张海斌
Original assignee: Zhangjiakou Yuhenglida Hydraulic Equipment Co Ltd
Current assignee: Zhangjiakou Yuhenglida Hydraulic Equipment Co Ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-05-11
Anticipated expiration: 2030-06-05

Abstract

The utility model relates to a pneumatic cylinder technical field specifically discloses a use buffer structure that floats on pneumatic cylinder, including the cylinder, be provided with unsteady cushion collar, piston and piston rod in the cylinder, the left end of unsteady cushion collar is the piston, the right-hand member of unsteady cushion collar is the piston rod step, and unsteady cushion collar is arranged in between piston and the piston rod step, and it has dozens of silk movements at the axial, can rotate around the axis simultaneously, the uide bushing is established and is arranged in the right side of cylinder, be provided with the buffer hole in the uide bushing. The utility model discloses can reduce the processing degree of difficulty of cushion collar, also no longer sensitive to the clearance between pneumatic cylinder piston and cylinder, uide bushing and the cylinder simultaneously, cushion effectually.

Description

Floating buffering structure used on hydraulic cylinder

Technical Field

The utility model relates to a pneumatic cylinder technical field, in particular to use buffer structure that floats on pneumatic cylinder.

Background

In the hydraulic cylinder, when the piston moves to both ends of the stroke in the case where the moving speed of the piston is relatively high, a relatively large impact is generated. To reduce this impact, the prior art solution has been to provide a damping structure at either or both ends of the cylinder to reduce the impact. The buffering is divided into fixed buffering and adjustable buffering. In the mode of fixing the buffer, the buffer hole and the buffer cone are not arranged on one part, so the processing precision (particularly the form and position precision) of the buffer part is higher (the common buffer gap is only a few threads). If the coaxiality error of the buffer hole and the buffer cone is slightly larger, the buffer hole and the buffer cone can be pulled to affect the buffer effect, and the hydraulic cylinder can be pulled to be even scrapped.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to defects such as the above-mentioned of prior art, a use buffer structure that floats on the pneumatic cylinder is provided, can reduce the processing degree of difficulty of cushion collar, also is no longer sensitive to the clearance between pneumatic cylinder piston and cylinder, uide bushing and the cylinder simultaneously, and buffering effect is good.

In order to solve the technical problem, the technical scheme of the utility model is that:

the utility model provides an use buffer structure that floats on pneumatic cylinder, includes the cylinder, be provided with unsteady cushion collar, piston and piston rod in the cylinder, unsteady cushion collar is arranged in between piston and the piston rod step, and it has dozens of silks' activity volume in axial and radial, can rotate around the axis simultaneously, the uide bushing is established in the right side of cylinder, be provided with the cushion hole in the uide bushing.

Preferably, the left end of the piston is provided with a nut, and the nut presses the piston on the piston rod.

Preferably, a cylindrical hole is formed in the floating buffer sleeve, and the floating buffer sleeve is sleeved on the piston rod.

Preferably, two chambers, namely a rodless chamber and a rod chamber, which are not communicated with each other, are formed in the cylinder barrel due to the existence of the piston and the sealing ring, the rodless chamber is positioned on the left side of the piston, and the rod chamber is positioned on the right side of the piston.

Preferably, the left end of the floating buffer sleeve is provided with a cylindrical surface, and the right end of the floating buffer sleeve is provided with a conical surface.

Preferably, the rod chamber communicates with the buffer hole.

Adopt above-mentioned technical scheme, the utility model provides a pair of use buffer structure that floats on pneumatic cylinder has following beneficial effect: when the piston and the floating buffer sleeve move rightwards to reach the left end face of the guide sleeve, the conical part on the right side of the floating buffer sleeve firstly enters the buffer hole of the guide sleeve, the cylindrical part of the floating buffer sleeve enters and is automatically aligned, the pull injury of the floating buffer sleeve and the cylindrical part caused by the coaxiality error is avoided, the hydraulic oil is not leaked through the gap between the floating buffer sleeve and the piston rod to further influence the buffer effect, the processing difficulty of the buffer sleeve can be reduced, meanwhile, the gap between the piston and the cylinder barrel of the hydraulic cylinder and the gap between the guide sleeve and the cylinder barrel are not sensitive any more, and the buffer effect is good.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure, 1-nut, 2-piston, 3-floating buffer sleeve, 4-piston rod, 5-guide sleeve, 6-cylinder barrel, 7-rodless cavity, 8-rod cavity, 9-buffer hole, 31-cylinder hole, 32-cylinder surface and 33-cone surface.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

As shown in fig. 1, in the structure diagram of the utility model, this use buffer structure that floats on pneumatic cylinder includes cylinder 6, is provided with unsteady cushion collar 3, piston 2 and piston rod 4 in this cylinder 6, and this unsteady cushion collar 3 is arranged in between the step of piston 2 and piston rod 4, and it has dozens of activities of silk in the axial with radially, can rotate around the axis simultaneously, and this uide bushing 5 sets up in the right side of this cylinder 6, is provided with buffering hole 9 in this uide bushing 5. It can be understood that the left end of the piston 2 is provided with a nut 1, and the nut 1 presses the piston 2 against the piston rod 4; a cylindrical hole 31 is arranged in the floating buffer sleeve 3, and the floating buffer sleeve 3 is sleeved on the piston rod 4; two chambers, namely a rodless chamber 7 and a rod chamber 8, which are not communicated with each other are formed in the cylinder barrel 6 due to the existence of the piston and the sealing ring, the rodless chamber 7 is positioned on the left side of the piston 2, and the rod chamber 8 is positioned on the right side of the piston 2; the left end of the floating buffer sleeve 3 is provided with a cylindrical surface 32, and the right end of the floating buffer sleeve 3 is provided with a conical surface 33; the rod chamber 8 communicates with the buffer hole 9.

Specifically, the floating cushion collar 3 is a sleeve-like component, the inner hole of which is a cylindrical hole 31, the right end of the outer part of which is a conical surface 33, and the left end of which is a cylindrical surface 32. The inner hole of the piston rod is smaller than the nominal diameter of the piston rod 4 and larger than the step for installing the piston 2, and is sleeved on one step of the piston rod 4, and a gap of 0.2-0.3 mm is reserved between the inner hole and the step. The outer diameter of the guide sleeve is matched with an inner hole (a buffer hole 9) at the left end of the guide sleeve 5, and a proper gap (a buffer gap designed according to the use requirement of the hydraulic cylinder) is reserved. The axial size of the floating buffer sleeve 3 is slightly smaller than the length of a step for mounting the floating buffer sleeve on the piston rod 4, and the floating buffer sleeve 3 can still freely move in a clearance range after the piston 2 is tightly pressed on the piston rod 4 by the nut 1. When the piston 2 together with the floating buffer sleeve 3 moves rightwards to reach the left end face of the guide sleeve 5, the conical part on the right side of the floating buffer sleeve 3 firstly enters the buffer hole 9 of the guide sleeve 5, and the cylindrical part of the floating buffer sleeve 3 enters and is automatically aligned. Not worrying about the two at this moment because the pulling that the axiality error caused, also not worrying about hydraulic oil and running off and then influence the buffering effect through the clearance of unsteady cushion collar 3 and piston rod 4 because the pneumatic cylinder has the pressure of pole chamber 8 to be greater than the inside pressure of buffer hole 9 of uide bushing 5 far away this moment, and the right-hand member face of unsteady cushion collar 3 hugs closely on the step terminal surface of piston rod 4 this moment.

It can be understood that the utility model relates to a rationally, the structure is unique, can reduce the processing degree of difficulty of the cushion collar 3 that floats, and general lathe can all process, and is also insensitive again to the clearance between pneumatic cylinder piston 2 and cylinder 6, uide bushing 5 and the cylinder 6 simultaneously to reach the purpose of fine buffering effect.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. The utility model provides an use buffer structure that floats on pneumatic cylinder, includes the cylinder, its characterized in that: the floating buffer sleeve is arranged between the piston and the piston rod step, has dozens of threads of movement in the axial direction and the radial direction and can rotate around an axis, the guide sleeve is arranged on the right side of the cylinder barrel, and the guide sleeve is internally provided with a buffer hole.

2. The floating cushion structure for use on a hydraulic cylinder of claim 1, wherein: and a nut is arranged at the left end of the piston and tightly presses the piston on the piston rod.

3. The floating cushion structure for use on a hydraulic cylinder of claim 1, wherein: a cylindrical hole is formed in the floating buffer sleeve, and the floating buffer sleeve is sleeved on the piston rod.

4. The floating cushion structure for use on a hydraulic cylinder of claim 1, wherein: a rodless cavity and a rod cavity which are not communicated with each other are formed in the cylinder barrel due to the existence of the piston and the sealing ring, the rodless cavity is positioned on the left side of the piston, and the rod cavity is positioned on the right side of the piston.

5. The floating cushion structure for use on a hydraulic cylinder of claim 1, wherein: the left end of the floating buffer sleeve is provided with a cylindrical surface, and the right end of the floating buffer sleeve is provided with a conical surface.

6. The floating cushion structure for use on a hydraulic cylinder of claim 4, wherein: the rod cavity is communicated with the buffer hole.