CN201982570U

CN201982570U - Piston pipe with damping hole

Info

Publication number: CN201982570U
Application number: CN2011200553711U
Authority: CN
Inventors: 张兴海; 蒋绍泉; 韩华
Original assignee: Chongqing Sokon Automobile Industry Group Co Ltd
Current assignee: Chongqing Yuan Innovation Technology Group Co Ltd
Priority date: 2011-03-04
Filing date: 2011-03-04
Publication date: 2011-09-21
Anticipated expiration: 2021-03-04

Abstract

The utility model discloses a piston pipe with a damping hole. The damping hole (2) is formed on the pipe wall of the piston pipe (1) and is punched through a hemispherical punch; the subdivision surface of the hemispherical punch is perpendicular to the axial line of the piston pipe (1); and the punching depth of the hemispherical punch on the pipe wall of the piston pipe (1) is H, the thickness of the pipe wall of the piston pipe (1) is L, the radius of the hemispherical punch is R, and H is greater than L and is less than or equal to R. Through the change of the shape structure of the damping hole, the opening direction of the damping hole is opposite to the backflow direction of oil liquid, so that the oil liquid compensation effect of the damping hole is greatly improved during the compression process of a shock absorber; and the piston pipe with the damping hole has the advantages of simple structure, convenience in manufacture, good flow intercepting effect, stability in damping, and effectively avoids the problem that idle running is generated due to insufficient oil liquid in a recovery cavity of the shock absorber.

Description

The piston tube of band damping hole

Technical field

The utility model relates to a kind of piston tube that has damping hole that is used for vibration damper.

Background technique

Figure 5 shows that the piston tube of traditional band damping hole, its damping hole 2 is horizontally installed on the tube wall of piston tube 1, the axis normal of the axis of damping hole 2 and piston tube 1.In the vibration damper compression process, the opening direction of piston tube damping hole is vertical with fluid backflow direction (as shown by arrows), the fluid DeGrain that dams, having only a small amount of fluid to add to vibration damper through damping hole restores in the chamber, cause and restore chamber fluid deficiency, the damping instability, thus produce idle running.

The model utility content

The utility model improves at above-mentioned technical problem, a kind of piston tube of the band damping hole that dams effective is provided, in the compression process of vibration damper, there is enough fluid to add to vibration damper and restores in the chamber, thereby avoid restoring the not enough idle running that produces of chamber inner fluid because of vibration damper through damping hole.

For solving above technical problem, a kind of piston tube that the utility model provides with damping hole, described damping hole (2) is opened on the tube wall of described piston tube (1), key is: described damping hole (2) is to be stamped to form by the hemisphere drift, the split surface of this hemisphere drift is perpendicular to the axis of described piston tube (1), the press depth of described hemisphere drift on piston tube (1) tube wall is H, the pipe thickness of described piston tube (1) is L, the radius of described hemisphere drift is R, then L＜H≤R.

As preferably, the press depth H of described hemisphere drift on described piston tube (1) tube wall is the twice of the pipe thickness L of described piston tube (1), i.e. H=2L.

The utility model is by the shape and structure of change damping hole, make the opening direction of damping hole relative with fluid backflow direction, increased the fluid compensation effect of damping hole in the vibration damper compression process greatly, have advantages such as simple in structure, easily manufactured, that effective, the damping of damming is stable, make vibration damper in compression process, there is enough fluid to add to vibration damper and restores in the chamber, thereby avoided effectively restoring the not enough problem that produces idle running of chamber inner fluid because of vibration damper through damping hole.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the B-B sectional view of Fig. 1.

Fig. 4 is a working state figure of the present utility model.

Fig. 5 is the piston tube of traditional band damping hole.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

A kind of piston tube with damping hole as shown in Figure 1 has damping hole 2 and oil inlet hole 3 on the tube wall of piston tube 1, oil inlet hole 3 is positioned at the right side of damping hole 2, and the axis normal of oil inlet hole 3 is in the axis of piston tube 1.Damping hole 2 is to be stamped to form by the hemisphere drift, and the hemisphere drift is half of spherical drift commonly used, is about to spherical drift be divided into two by split surface, and the split surface of this hemisphere drift is perpendicular to the axis of piston tube 1.The press depth of hemisphere drift on piston tube 1 tube wall is H, and the pipe thickness of piston tube 1 is L, and the radius of hemisphere drift is R, then requires L＜H≤R.During work, fluid in oil inlet hole 3 enters piston tube 1, fluid backflow direction as shown by arrows, the opening direction of the damping hole 2 that is stamped to form is relative with fluid backflow direction.

Wherein the press depth H of hemisphere drift on piston tube 1 tube wall be greater than the pipe thickness L of piston tube 1, is in order to guarantee that the hemisphere drift can go out an opening on the tube wall of piston tube 1, to form the passage that fluid refluxes; Simultaneously, the radius that the press depth H of hemisphere drift on piston tube 1 tube wall is less than or equal to the hemisphere drift is R, is in order to guarantee that damping hole 2 integral body are circular arc, is convenient to form the streamline passage that fluid is smooth and easy to be passed through.

Fig. 2 is the A-A sectional view of Fig. 1, and Fig. 3 is the B-B sectional view of Fig. 1, and in conjunction with Fig. 1, Fig. 2, Fig. 3 as can be known, the damping hole 2 on piston tube 1 tube wall is hemisphere.

As preferably, the press depth H of hemisphere drift on piston tube 1 tube wall is the twice of the pipe thickness L of piston tube 1, i.e. H=2L.Pipe thickness L as piston tube 1 is 10mm, and the press depth H of hemisphere drift on piston tube 1 tube wall is 20mm, and the radius R of hemisphere drift is 20mm.

Shown in Figure 4, vibration damper is made up of piston tube 1, breeches pipe 4, end tube 5, buffer spring 6, damping spring 7, compression chamber 8 and recovery chamber 9 etc.Breeches pipe 4 moves downward, and compression shock absorption spring 7, the part fluid in the compression chamber 8 flow into through the valve body slit and restore in the chamber 9, and the oil inlet hole 3 of other fluid in the compression chamber 8 on piston tube 1 flows in the piston tube 1, and the flow direction of two-part fluid is shown in arrow among the figure.Because the opening direction of damping hole 2 is relative with the fluid backflow direction in the piston tube 1 on the piston tube 1, the fluid effect of damming is obvious, can finely make fluid add to vibration damper and restore in the chamber 9 by damping hole 2, avoided effectively vibration damper in recuperation because the fluid deficiency of restoring in the chamber 9 produces idle running.

Claims

1. piston tube with damping hole, described damping hole (2) is opened on the tube wall of described piston tube (1), it is characterized in that: described damping hole (2) is to be stamped to form by the hemisphere drift, the split surface of this hemisphere drift is perpendicular to the axis of described piston tube (1), the press depth of described hemisphere drift on piston tube (1) tube wall is H, the pipe thickness of described piston tube (1) is L, and the radius of described hemisphere drift is R, then L＜H≤R.

2. according to the piston tube of the described band damping hole of claim 1, it is characterized in that: the press depth H of described hemisphere drift on described piston tube (1) tube wall is the twice of the pipe thickness L of described piston tube (1), i.e. H=2L.