Automobile reducer

Patent metadata

Field	Value
Publication number	US-2016201760-A1
Application number	US-201614988679-A
Country	US
Kind code	A1
Filing date	Jan 5, 2016
Priority date	Jan 12, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

The present disclosure provides an automobile reducer including a worm shaft bearing coupled to an end of a worm shaft meshing with a worm wheel, the end lying opposite a portion of the worm shaft coupled to a motor shaft; a bush coupled to an outer peripheral surface of the worm shaft bearing, the bush having an incision formed by incising one side of the bush; a damper coupled to an outer peripheral surface of the bush inside a housing so as to force the bush against the worm shaft bearing and to elastically support between the housing and the worm shaft bearing; and a clearance compensation mechanism penetrating the damper and pressurizing the bush towards the worm wheel. The automobile reducer can accurately assist the driver's steering wheel manipulation.

First claim

What is claimed is:

1 . An automobile reducer comprising:
a worm shaft bearing coupled to an end of a worm shaft meshing with a worm wheel, the end lying opposite a portion of the worm shaft coupled to a motor shaft; a bush coupled to an outer peripheral surface of the worm shaft bearing, the bush having an incision formed by incising one side of the bush; a damper coupled to an outer peripheral surface of the bush inside a housing so as to elastically support between the housing and the bush; and a clearance compensation mechanism penetrating the damper and pressurizing the bush towards the worm wheel.

2 . The automobile reducer of claim 1 , wherein the housing has a penetration hole formed such that the clearance compensation mechanism penetrates and is installed, and the clearance compensation mechanism comprises an elastic member, which penetrates the damper and elastically supports the bush towards the worm wheel, and an adjustment member, which is screw-coupled to the penetration hole so as to adjust an elastic force of the elastic member.

3 . The automobile reducer of claim 2 , wherein the damper has a communication hole formed in a position corresponding to the penetration hole, the communication hole communicating with the penetration hole.

4 . The automobile reducer of claim 2 , wherein the clearance compensation mechanism is provided with a pressurization member between the elastic member and the bush, and the elastic member elastically supports the pressurization member towards the worm wheel.

5 . The automobile reducer of claim 1 , wherein the damper has slits formed in the shape of recesses on one or both of outer and inner peripheral surfaces so as to extend from one side end to the other side end while being spaced from each other in a circumferential direction.

6 . The automobile reducer of claim 1 , wherein the damper has slits formed in the shape of recesses on both of inner and outer peripheral surfaces while being spaced from each other in a circumferential direction, and the slits formed on the inner peripheral surface are positioned between respective slits formed on the outer peripheral surface.

7 . The automobile reducer of claim 1 , wherein the bush has a groove formed in the shape of a recess along a circumferential periphery between one side and the other side end, and the damper is coupled to the groove.

8 . The automobile reducer of claim 1 , wherein a coupling groove is formed on an inner peripheral surface of the housing in the shape of a recess along a periphery, and an outer peripheral surface of the damper is supported in the coupling groove and damped.

9 . The automobile reducer of claim 1 , wherein an inner peripheral surface of the housing in a position, in which the worm shaft bearing, the bush, and the damper are coupled, is formed in the shape of an ellipse elongated towards or away from the worm wheel such that the worm shaft bearing can move towards or away from the worm wheel.

10 . The automobile reducer of claim 1 , wherein the clearance compensation mechanism is a leaf spring elastically supporting between an inner peripheral surface of the housing and an outer peripheral surface of the bush.

11 . The automobile reducer of claim 10 , wherein the clearance compensation mechanism comprises a support portion, which supports the inner peripheral surface of the housing, and bent portions, which are bent from both sides of the support portion so as to elastically support the bush.

12 . The automobile reducer of claim 11 , wherein the bent portions are elastically deformed and coupled between the housing and the bush so as to elastically support the bush in a direction that defines a predetermined angle with regard to a direction in which the worm shaft and the worm wheel mesh with each other.

13 . The automobile reducer of claim 12 , wherein an insertion hole is formed on the damper, the bent portions being inserted into the insertion hole, such that the bush can be elastically supported.

Assignees

• Mando Corp

Inventors

• Kwon Hyun Bi

Classifications

• H02K7/1166

  comprising worm and worm-wheel (structural association with bearings specially adapted for worm gear drives H02K7/081) · CPC title

• B62D3/04

  of worm type · CPC title

• F16H55/24 Primary

  Special devices for taking up backlash · CPC title

• F16H1/16 Primary

  comprising worm and worm-wheel · CPC title

• F16H2057/0213

  Support of worm gear shafts · CPC title