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Oil pressure damper piston rod anti-loosing device for high-speed motor car

A technology for hydraulic shock absorbers and high-speed motor vehicles, which is applied in the direction of shock absorbers, shock absorbers, springs/shock absorbers, etc., and can solve problems such as the length occupied by nuts, the unfavorable overall structural layout, and the lack of special process management. To achieve the effect of reliable thread locking and improving production efficiency

Pending Publication Date: 2019-04-19
深圳市业成实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The second is to use the anti-loosening method of applying pre-tightening force on the threaded end, and the anti-loosening effect is reliable, and no special process management is adopted during this period.
However, compared with the first method, the length of the rod end used in this method is longer, and the nut will occupy a certain length. For the design of the hydraulic shock absorber, it is not conducive to the layout of the overall structure

Method used

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  • Oil pressure damper piston rod anti-loosing device for high-speed motor car
  • Oil pressure damper piston rod anti-loosing device for high-speed motor car

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A threaded hole with a 15° slope is processed at the end of the piston rod, and a 3.5mm deep and 1.5mm wide groove is milled symmetrically at the rod end at 90°. After the piston assembly is assembled into the piston rod, the extrusion screw is tightened so that The rod end of the piston rod expands under the pressure of the extruding screw, which plays a role of anti-loosening by changing the diameter. This method does not need to be glued and locked, and avoids complicated chemical reactions and parameter control required for curing. Since the inner hole is added at the rod end, the length of the piston rod will not be increased, which is effective. Under the condition that the oil pressure shock absorber does not increase the base length, the problem of anti-loosening of the thread is solved.

[0023] After the piston assembly is installed at the installation end of the piston rod, use a special piston wrench to preliminarily tighten the piston assembly so that the e...

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PUM

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Abstract

The invention relates to an oil pressure damper piston rod anti-loosing device for a high-speed motor car. The oil pressure damper piston rod anti-loosing device comprises a piston and an interferencescrew, wherein a beveled threaded hole part with a certain angle is arranged on the piston rod; grooves are formed in the bottom of the beveled threaded hole part; and the interference screw is equipped with a beveled threaded part and a cylindrical part in a matching manner, so that the expansive deformation of the piston rod can be caused during the screwing-in process of the interference screw. By the adoption of the oil pressure damper piston rod anti-loosing device provided by the invention, the production efficiency is improved and the threaded locking reliability at the piston rod endis ensured.

Description

technical field [0001] The invention belongs to the technical field of high-speed motor vehicles, and in particular relates to a piston rod anti-loosening device of an oil pressure shock absorber for high-speed motor vehicles. Background technique [0002] At present, there are two kinds of anti-loosening structures. One is to tighten the front thread of the piston assembly and the front end of the piston rod while applying thread locking glue on the thread pair to prevent loosening. Loctite 243 anaerobic thread lock is usually used. Glue curing, glue curing conditions and temperature, thread clearance, surface cleanliness, and time have relatively strict requirements, so this glue application process is included in a special process for management to ensure that the glue is cured and the looseness between threads is guaranteed. [0003] The second is to adopt the anti-loosening method of applying pre-tightening force by the nut at the threaded end, and the anti-loosening ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F9/32F16B39/284
CPCF16B39/284F16F9/3228
Inventor 黄建伟吴旭吴彤
Owner 深圳市业成实业有限公司