CN201851580U

CN201851580U - Piston for shock absorber of automobile

Info

Publication number: CN201851580U
Application number: CN2010205850175U
Authority: CN
Inventors: 徐信国
Original assignee: NINGBO NINGJIANG POWDER-METALLURGY Co Ltd
Current assignee: NINGBO NINGJIANG POWDER-METALLURGY Co Ltd
Priority date: 2010-10-27
Filing date: 2010-10-27
Publication date: 2011-06-01
Anticipated expiration: 2020-10-27

Abstract

The utility model discloses a piston for a shock absorber of an automobile, which comprises an outer ring oil hole (1), an inner ring oil hole (2) and a piston skirt inner side wall (3) and is characterized in that a notch groove (4) corresponding to the position of the outer ring oil hole (1) is formed on the piston skirt inner side wall (3). With the adoption of the piston with the structure, the radial distance between the outer ring oil hole (1) and the piston skirt inner side wall (3) is enlarged; and when the piston pressure molding mould is manufactured, the thickness of the mould is increased, so that the damage caused by too thin outer wall of the mould and the fragmentation of the mould during in the pressure molding process are effectively avoided. Furthermore, the piston is not required to be machined, and the four outer ring oil holes are formed after being pressed through the mould at one time, so that the machining cost of products is lowered, an the consistence of the products is further improved.

Description

The vehicle shock absorber piston

Technical field:

The utility model relates to a kind of auto parts, specifically is a kind of vehicle shock absorber piston.

Background technique:

Vehicle shock absorber is a kind of damping member, it is one of important composition element of automobile suspension system, be the rapid wear accessory in the automobile using process, smoothness, travelling comfort, Security, steering operation and passing ability to vehicle driving play conclusive effect, and wherein piston is one of strength member in the vehicle shock absorber.Piston has fundamental influence to the vibration damper usability, and the oil leaking hole that is arranged on the piston then is that damping force produces an indispensable part.As shown in Figure 1, 2, oil leaking hole on the piston that the prior art vehicle shock absorber is used generally comprises 4 outer ring oilholes 1 ' and 4 inner ring oilholes 2 ', structure in view of product itself, the metallurgical DESIGNED FEATURE of while combining powder, when the structure of design compaction piston forming mould, mold joint must be fixed on piston skirt madial wall 3 ' locates, again since 4 outer ring oilholes and piston skirt madial wall 3 ' join substantially, so the mould of made oilhole place, 4 outer rings will become extremely thin a little less than, even make the mould outer wall directly damaged, thereby cause mould can't make production.Therefore, 4 oilholes in outer ring can only adopt follow-up machining, but employing machining can increase the fabricating cost of product again, and its conformity is also relatively poor.

The model utility content:

Technical problem to be solved in the utility model is to provide a kind of consistency of product good, the vehicle shock absorber piston that the production cost is low.

For solving the problems of the technologies described above, the vehicle shock absorber piston that the utility model provides comprises the outer ring oilhole, the inner ring oilhole, and piston skirt madial wall, described piston skirt madial wall are provided with and the corresponding gap slot of outer ring oil-hole location.

Adopt said structure, thereby strengthened the radial distance between outer ring oilhole and the piston skirt madial wall, when making the piston press-moulding die, be equivalent to mould many herein radial projection outwards, increased the thickness of mould herein, thereby mould is cracked when effectively having avoided mould outer wall too weak and the breakage that causes and compression moulding.And, need not machining, 4 oilholes in outer ring can adopt a compression moulding of mould, thereby have reduced the machining cost of product, have more improved consistency of product.

As improvement, described gap slot is the circular arc cutaway groove; As further improvement, the center of circle of the circular arc camber line place of described gap slot circle overlaps with the center of circle of outer ring oilhole.Adopt said structure, when making corresponding mould, be easy to processing.

Description of drawings:

Fig. 1 is the automobile absorber of a prior art structure of piston schematic representation.

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

As shown in the figure: 1 ', outer ring oilhole, 2 ', the inner ring oilhole, 3 ', the piston skirt madial wall.

Fig. 3 is an automobile absorber of the present utility model structure of piston schematic representation.

Fig. 4 is the sectional view of B-B direction among Fig. 3.

As shown in the figure: 1, outer ring oilhole, 2, the inner ring oilhole, 3, the piston skirt madial wall, 4, gap slot.

Embodiment:

Below in conjunction with the drawings and specific embodiments, the utility model is described further:

Automobile absorber piston of the present utility model as shown in Figure 3, Figure 4 comprises outer ring oilhole 1, and inner ring oilhole 2, piston skirt madial wall 3, described piston skirt madial wall 3 are provided with and the corresponding gap slot 4 in outer ring oilhole 1 position; Described gap slot 4 is the circular arc cutaway groove; The center of circle of the circular arc camber line place circle of described gap slot 4 overlaps with the center of circle of outer ring oilhole 1, the employing said structure has increased the radial distance between outer ring oilhole 1 and the piston skirt madial wall 3, when making the piston compacting tool set, just can increase the wall thickness of mould herein, thereby increased the intensity of mould, effectively avoided the breakage of mould, need not following adopted machining outer ring oilhole again, provide cost savings, increased consistency of product.

Claims

1. a vehicle shock absorber piston comprises outer ring oilhole (1), inner ring oilhole (2), and piston skirt madial wall (3) is characterized in that: described piston skirt madial wall (3) is provided with and the corresponding gap slot in outer ring oilhole (1) position (4).

2. vehicle shock absorber piston according to claim 1 is characterized in that: described gap slot (4) is the circular arc cutaway groove.

3. vehicle shock absorber piston according to claim 2 is characterized in that: the center of circle of the circular arc camber line place circle of described gap slot (4) overlaps with the center of circle of outer ring oilhole (1).