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Piston valve for motor car damper

A shock absorber, piston valve technology, applied in shock absorbers, springs/shock absorbers, shock absorbers, etc., can solve the problems of low use frequency of shock absorbers, slow load of shock absorbers, and small damping force, etc. Achieve the effect of increasing Rockwell hardness, improving flexural strength and high density

Inactive Publication Date: 2017-02-01
NINGBO RUIFENG AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing shock absorber piston valve structure includes an integrally formed valve body, a mounting hole is opened in the middle of the valve body, and a valve hole penetrating the valve body is opened on the surface periphery of the valve body, and the valve hole is a through hole. , The shape of this valve hole causes some technical problems. This kind of hole causes the frequency of the shock absorber to be low, the damping force is small, the load of the shock absorber is slow, and the response is slow, which leads to poor shock absorption effect of the shock absorber. , the body bumps more violently

Method used

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  • Piston valve for motor car damper
  • Piston valve for motor car damper
  • Piston valve for motor car damper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Powder mixing: water-atomized iron powder (50-120 μm water-atomized iron powder accounts for 30% of the total mass of water-atomized iron powder, and the balance is water-atomized iron powder with a particle size of 10-30 μm), copper powder, The colloidal graphite is uniformly mixed and pressed at 760MPa and 94°C for 10s to obtain the iron-based powder alloy piston valve blank.

[0043] Sintering: The iron-based powder alloy piston valve blank is sintered at 1150° C. for 40 minutes in a mixed gas of hydrogen and nitrogen (the volume percentage of hydrogen and nitrogen is 2%:98%) to obtain a semi-finished iron-based powder alloy piston valve.

[0044] The iron-based powder alloy piston valve semi-finished product is successively subjected to resonance grinding, oil immersion, rolling, cleaning, heat treatment, cleaning, and oil immersion to obtain the iron-based powder alloy piston valve substrate. Among them, the abrasive used in resonance grinding is silica abrasive, a...

Embodiment 2

[0047] Powder mixing: water-atomized iron powder (50-120 μm water-atomized iron powder accounts for 40% of the total mass of water-atomized iron powder, and the balance is water-atomized iron powder with a particle size of 10-30 μm), copper powder, The colloidal graphite is uniformly mixed and pressed at 750MPa and 92°C for 16s to obtain the iron-based powder alloy piston valve blank.

[0048] Sintering: The iron-based powder alloy piston valve blank was sintered at 1160° C. for 50 minutes in a mixed gas of hydrogen and nitrogen (the volume percentage of hydrogen and nitrogen was 3%:97%) to obtain a semi-finished iron-based powder alloy piston valve.

[0049] The fixed block semi-finished product and the movable block semi-finished product are respectively subjected to resonance grinding, oil immersion, rolling, cleaning, heat treatment, cleaning, and oil immersion respectively to obtain fixed block finished products and movable block finished products. Among them, the abrasiv...

Embodiment 3

[0052] Powder mixing: water-atomized iron powder (50-120 μm water-atomized iron powder accounts for 20% of the total mass of water-atomized iron powder, and the balance is water-atomized iron powder with a particle size of 10-30 μm), copper powder, The colloidal graphite was mixed evenly, and pressed at 770MPa and 96°C for 5s to obtain the iron-based powder alloy piston valve blank.

[0053] Sintering: The iron-based powder alloy piston valve blank was sintered at 1120° C. for 60 minutes in a mixed gas of hydrogen and nitrogen (the volume percentage of hydrogen and nitrogen was 3.8%:96.2%) to obtain a semi-finished iron-based powder alloy piston valve.

[0054] The fixed block semi-finished product and the movable block semi-finished product are respectively subjected to resonance grinding, oil immersion, rolling, cleaning, heat treatment, cleaning, and oil immersion respectively to obtain fixed block finished products and movable block finished products. Among them, the abras...

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Abstract

The invention provides a piston valve for a motor car damper, and belongs to the technical field of dampers. The piston valve comprises an upper valve body and a lower valve body connected with the upper valve body. An upper mounting hole is formed in the middle of the upper valve body. Three first inwards-bent holes are formed in the upper valve body. Three first outwards-bent holes are formed in the periphery of the upper valve body. A lower mounting hole is formed in the middle of the lower valve body. Three second inwards-bent holes are formed in the lower valve body. Second outwards-bent holes are evenly formed in the periphery of the lower valve body. The first inwards-bent holes communicate with the second inwards-bent holes. The first outwards-bent holes communicate with the second outwards-bent holes. The piston valve for the motor car damper is made from powder metallurgical sintered steel. The powder metallurgical sintered steel is mainly composed of 0.3-0.6% of C, 1.5-3.9% of Cu and the balance Fe. The powder metallurgical sintered steel adopts iron-based powder alloy as a basal body, and is obtained through infiltration treatment with a copper infiltration agent. By adopting the structure, the inclined load of the damper is faster, the response is rapider, the damping effect is good, and the service life is long.

Description

technical field [0001] The invention belongs to the technical field of shock absorbers, and relates to a piston valve used for shock absorbers of motor vehicles. Background technique [0002] The existing shock absorber piston valve structure includes an integrally formed valve body, a mounting hole is opened in the middle of the valve body, and a valve hole penetrating the valve body is opened on the surface periphery of the valve body, and the valve hole is a through hole. , The shape of this valve hole causes some technical problems. This kind of hole causes the frequency of the shock absorber to be low, the damping force is small, the load of the shock absorber is slow, and the response is slow, which leads to poor shock absorption effect of the shock absorber. , the body bumps more severe. [0003] To sum up, in order to solve the technical problems of the above-mentioned piston valves, it is necessary to design a piston valve with fast load and quick response for the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F9/32F16F9/34B22F1/00B22F3/02B22F3/10B22F5/00C21D1/18C22C38/16C23C10/22
CPCF16F9/34B22F1/0003B22F3/02B22F3/1007B22F5/00B22F2999/00C21D1/18C22C38/16C23C10/22F16F9/3214B22F2201/013B22F2201/02
Inventor 邬建尧
Owner NINGBO RUIFENG AUTO PARTS
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