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Worm wheel for electric power steering apparatus and method for manufacturing the same

An electric power steering, worm gear technology, applied in power steering mechanism, steering mechanism, mechanical steering gear, etc., can solve the problems of deterioration of molding performance, deterioration of durability of parts, deformation of rack rod and steering shaft, etc., to increase mechanical durability. performance and friction characteristics, stable long-term use, and the effect of increasing moldability

Inactive Publication Date: 2013-09-11
HL MANDO CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, when the worm wheel of the speed reducer is made of synthetic resin, its moldability deteriorates and material cost increases
Further, since the worm shaft, worm wheel, and steering shaft rotating together are engaged with each other, a torque load and vibration generated by frequent rotation are largely transmitted, deteriorating durability of parts or damaging parts in severe cases
[0011] In particular, when the vehicle is running on an uneven road, the load transmitted by the wheels through the rack bar and the steering shaft may increase instantaneously, causing the rack bar and the steering shaft to deform or damage their shape, which is difficult for the driver. , which may cause a security incident

Method used

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  • Worm wheel for electric power steering apparatus and method for manufacturing the same
  • Worm wheel for electric power steering apparatus and method for manufacturing the same
  • Worm wheel for electric power steering apparatus and method for manufacturing the same

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Embodiment Construction

[0028] Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings. In the following description, the same elements will be given the same reference numerals even though they appear in different drawings. In addition, in the following description process of the present invention, if the introduction of those known functions or incompatible configurations may make the relationship of matters of the present invention unclear, then they will be ignored.

[0029] In addition, terms such as first, second, A, B, (a), (b) and the like may be used when describing components of the present invention. These terms are not intended to be used to define a substance, order or sequence of the corresponding component, but are used only to distinguish a corresponding component from other components. It should be noted that when a component is described in a specification as being "connected", "coupled" or "joined" with another c...

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Abstract

Disclosed is a worm wheel of a reducer of an electric power steering apparatus which is manufactured by integrally injection-molding a hub, a boss, and a gear forming part, thereby making it possible to increase a forming performance of the worm wheel and reduce an amount of material, and increasing a mechanical durability and frictional characteristics of the worm wheel to allow the reducer to be stably used for a long time, and a method for manufacturing the same.

Description

technical field [0001] The present invention relates to a worm gear used in an electric power steering device and a method for manufacturing the worm gear, especially, the worm gear of a reducer of an electric power steering device is formed by integral injection molding of a hub, a boss And a gear, so this can increase the formability of the worm gear, reduce the total amount of material, and increase the mechanical durability and friction characteristics of the worm gear, so that the reducer can be used stably for a long time. The invention also relates to a method for manufacturing said worm wheel. Background technique [0002] Generally, a power steering device installed on a vehicle includes an electric power steering device, the steering force of which is adjusted by a motor. In the electric power steering device, an electronic control unit accurately drives the motor according to the vehicle running conditions sensed by various sensors, such as a speed sensor and a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62D3/04
CPCB29C45/1459B29C45/1671B29C45/2708B29L2015/003B62D5/0409F16H55/06F16H55/22F16H2055/065Y10T74/1987B62D3/04B62D5/24F16H55/17
Inventor 金成守安熙哲
Owner HL MANDO CORP
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