CN201547173U

CN201547173U - Piston used for automobile shock absorber

Info

Publication number: CN201547173U
Application number: CN2009202014041U
Authority: CN
Inventors: 石文光; 竺春光
Original assignee: Ningbo Yinzhou Tuofa Powder Metallurgy Factory
Current assignee: Ningbo Yinzhou Tuofa Powder Metallurgy Factory
Priority date: 2009-11-27
Filing date: 2009-11-27
Publication date: 2010-08-11
Anticipated expiration: 2019-11-27

Abstract

The utility model discloses a piston used for an automobile shock absorber, comprising a piston body provided with a damping hole. The piston body is formed by rolling a first piston body (5) and a second piston body (6); a damping hole on the first piston body (5) consists of an outer ring damping hole I (3) and an inner ring damping hole I (4); a damping hole on the second piston body (6) consists of an outer ring damping hole II (7) and an inner ring damping hole II (8); the outer ring damping hole I (3), the outer ring damping hole II (7), the inner ring damping hole I (4) and the inner ring damping hole II (8) respectively comprise an axial part and an inclined part which are integrated into a whole; the inclined part of the outer ring damping hole I (3) is communicated with the inclined part of the inner ring damping hole II (8); and the inclined part of the outer ring damping hole II (7) is communicated with the inclined part of the inner ring damping hole I (4). The utility model not only can avoid burring at the periphery of the damping hole, but also can greatly reduce the manufacturing cost.

Description

The automobile absorber piston

Technical field:

The utility model relates to a kind of piston, specifically is a kind of automobile absorber piston.

Background technique:

Automobile absorber is one of important composition element of automobile suspension system, it all is installed between vehicle frame and the vehicle bridge usually, its working principle is: when being subjected to vibration relative movement to occur between vehicle frame and vehicle bridge, piston in the vehicle shock absorber moves up and down, fluid in the vibration damper cylinder body just enters in another cavity through the damping hole that piston is provided with from a cavity that is separated by piston repeatedly, at this moment, friction formed a damping force to vibration in friction between damping hole hole wall and fluid and fluid were intermolecular, make automobile vibrational energy be converted into fluid heat energy, absorb by the vibration damper cylinder body at last and be dispersed in the atmosphere.

When making above-mentioned pistons work can and fluid between produce suitable damping force, avoid damping force excessive (or too small) and cause the link in the automobile absorber to damage, the prior art automobile absorber all can be designed to the form of inclined hole usually with the damping hole on the piston, as depicted in figs. 1 and 2, this piston comprises piston only 1, and described piston only 1 is provided with a plurality of damping holes 2; Fluid can pass through piston only with the type of flow that tilts under the guiding of damping hole 2 when above-mentioned pistons work, thereby reaches the purpose that produces suitable damping force.Though piston of the prior art is being brought into play important effect in automobile absorber, but, still there is a deficiency in it in actual application: because above-mentioned damping hole is to be distributed on the piston only in the mode that tilts, therefore it causes the people can't be with its together moulding compacting when the moulding piston only, usually can only be after piston only compression moulding, adopt the mode of machining that damping hole is made again, and machining is easy to cause the periphery place of damping hole to produce burr, the generation of burr makes people must not no longer increase by one deburring operation, operation increase the manufacture cost that has increased the prior art piston undoubtedly greatly.

The model utility content:

The technical problems to be solved in the utility model is to provide a kind of damping hole periphery place that not only can avoid to produce burr, and can reduce the automobile absorber piston of manufacture cost greatly.

Technical solution of the present utility model is, a kind of automobile absorber piston with following structure is provided, and it comprises piston only; Described piston only is provided with damping hole; Described piston only is formed by first piston body and the compacting of second piston only; Damping hole on the described first piston body comprises outer ring damping hole I and inner ring damping hole I; The radial distance at described outer ring damping hole I and first piston body center is greater than the radial distance at inner ring damping hole I and first piston body center; Damping hole on described second piston only comprises outer ring damping hole II and inner ring damping hole II; The radial distance at the described outer ring damping hole II and the second piston only center is greater than the radial distance at the inner ring damping hole II and the second piston only center; Described outer ring damping hole I, outer ring damping hole II, inner ring damping hole I and inner ring damping hole II include and are holistic axial component and incline section; The incline section of described outer ring damping hole I communicates with the incline section of inner ring damping hole II; The incline section of described outer ring damping hole II communicates with the incline section of inner ring damping hole I.

After adopting above structure, compared with prior art, the utlity model has following advantage: unlike the prior art, the utility model not only is divided into piston only first piston body and two parts of second piston only, but also being included, outer ring damping hole I on the described first piston body and the outer ring damping hole II on the inner ring damping hole I and second piston only and inner ring damping hole II be holistic axial component and incline section, though described outer ring damping hole I, inner ring damping hole I, has incline section on outer ring damping hole II and the inner ring damping hole II, but the incline section in the utility model is different from inclined hole of the prior art again, because this incline section is that the axis of part vertically is outward-dipping, therefore, it is to a powder pressing forming did not influence, in other words, outer ring damping hole I in the utility model and inner ring damping hole I can be with the disposable powder compression mouldings of first piston body, and outer ring damping hole II and inner ring damping hole II also can be suppressed into the utility model automobile absorber piston with the first piston body and second piston only at last again with the disposable powder compression moulding of second piston only; In addition, just because of in the utility model the incline section of stating outer ring damping hole I communicate with the incline section of inner ring damping hole II; The incline section of described outer ring damping hole II communicates with the incline section of inner ring damping hole I, and fluid can pass through piston with the type of flow that tilts when therefore having guaranteed pistons work under the guiding of damping hole, thereby reaches the purpose that produces suitable damping force.In sum, the utility model not only can avoid damping hole periphery place to produce burr because removing machining from, and can reduce manufacture cost of the present utility model greatly.

Description of drawings:

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

Fig. 2 is the sectional structure schematic representation along " A-A " line among Fig. 1.

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

Fig. 4 is the structural representation of looking up of Fig. 3.

Fig. 5 is the sectional structure schematic representation along " B-B " line among Fig. 4.

Fig. 6 is the decomposition texture schematic representation of Fig. 3.

Shown in the figure, 1, piston only, 2, damping hole, 3, outer ring damping hole I, 4, inner ring damping hole I, 5, the first piston body, 6, second piston only, 7, outer ring damping hole II, 8, inner ring damping hole II.

Embodiment:

The utility model is described in further detail below in conjunction with the drawings and specific embodiments:

As Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, in this embodiment, the utility model automobile absorber comprises piston only with piston; Described piston only is provided with damping hole; Described piston only is formed by

first piston body

5 and 6 compactings of second piston only; Damping hole on the described first piston body 5 comprises four outer ring damping hole I3 and four inner ring damping hole I4; The radial distance at described outer ring damping hole I3 and first piston body 5 centers is greater than the radial distance at inner ring damping hole I4 and first piston body 5 centers; Damping hole on described second piston only 6 comprises four outer ring damping hole II7 and four inner ring damping hole II8; The radial distance at described outer ring damping hole II7 and second piston only, 6 centers is greater than the radial distance at inner ring damping hole II8 and second piston only, 6 centers; Described outer ring damping hole I3, outer ring damping hole II7, inner ring damping hole I4 and inner ring damping hole II8 include and are holistic axial component and incline section; Corresponding one by one the communicating of incline section of the incline section of described four outer ring damping hole I3 and four inner ring damping hole II8; Corresponding one by one the communicating of incline section of the incline section of described four outer ring damping hole II7 and four inner ring damping hole I4.

Claims

1. automobile absorber piston, it comprises piston only; Described piston only is provided with damping hole, it is characterized in that: described piston only is formed by first piston body (5) and second piston only (6) compacting; Damping hole on the described first piston body (5) comprises outer ring damping hole I (3) and inner ring damping hole I (4); The radial distance at described outer ring damping hole I (3) and first piston body (5) center is greater than the radial distance of inner ring damping hole I (4) with first piston body (5) center; Damping hole on described second piston only (6) comprises outer ring damping hole II (7) and inner ring damping hole II (8); The radial distance at described outer ring damping hole II (7) and second piston only (6) center is greater than the radial distance of inner ring damping hole II (8) with second piston only (6) center; Described outer ring damping hole I (3), outer ring damping hole II (7), inner ring damping hole I (4) and inner ring damping hole II (8) include and are holistic axial component and incline section; The incline section of described outer ring damping hole I (3) communicates with the incline section of inner ring damping hole II (8); The incline section of described outer ring damping hole II (7) communicates with the incline section of inner ring damping hole I (4).