KR20110086358A - Anti- rattle assembly in motor driven power steering - Google Patents

Anti- rattle assembly in motor driven power steering Download PDF

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Publication number
KR20110086358A
KR20110086358A KR1020100006044A KR20100006044A KR20110086358A KR 20110086358 A KR20110086358 A KR 20110086358A KR 1020100006044 A KR1020100006044 A KR 1020100006044A KR 20100006044 A KR20100006044 A KR 20100006044A KR 20110086358 A KR20110086358 A KR 20110086358A
Authority
KR
South Korea
Prior art keywords
motor housing
rattle
fixed
cover
bearing hole
Prior art date
Application number
KR1020100006044A
Other languages
Korean (ko)
Inventor
오영기
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020100006044A priority Critical patent/KR20110086358A/en
Publication of KR20110086358A publication Critical patent/KR20110086358A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0403—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by constructional features, e.g. common housing for motor and gear box
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
    • B62D5/046—Controlling the motor
    • B62D5/0472—Controlling the motor for damping vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/05—Reducing production costs, e.g. by redesign
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2304/00—Optimising design; Manufacturing; Testing
    • B60Y2304/07—Facilitating assembling or mounting

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

PURPOSE: An anti-rattle assembly of a motor driven power steering system is provided to reduce an assembling process by performing two actions simultaneously with one assembly process using a plug portion having a dual function, to shorten the manufacturing time of a product by unifying in one component, and to secure cost competitiveness and to improve the quality of a component. CONSTITUTION: An anti-rattle assembly of a motor driven power steering system comprises a pressure member pressing vertically a bearing located in an inner boss of a motor housing(4), an anti-rattle spring applying elastic load to the pressure member, and a plug cover(8) pressing the anti-rattle spring from the outside of the motor housing and covering the inner boss of the motor housing to cut off the penetration of external impurities.

Description

Anti-rattle assembly in Motor Driven Power Steering

The present invention relates to an electric steering apparatus, and more particularly to an anti-rattle mechanism with a reduced number of parts.

In general, MDPS (Motor Driven Power Steering), which is an electric steering device, is a method of assisting steering power by motor power without using hydraulic pressure.

To this end, the MDPS is provided with a motor that is ECU-controlled to generate power, a worm shaft that is rotated through the motor, and a worm wheel that is engaged with the worm wheel, thereby transferring the rotational force of the worm wheel to the gearbox. It transmits and assists steering power.

As described above, MDPS has no choice but to generate rattle noise, which is a metallic noise caused by interdental gaps caused by a chimamo and other factors, by using an interlocking worm shaft and a worm wheel.

The anti-rattle mechanism prevents rattle noise by pressing the worm shaft toward the worm wheel, and is usually implemented by using an elastic force through an anti-rattle spring.

To this end, in the above manner, the plug member is provided to support the anti-rattle spring pressed against the worm shaft side, and a bearing cover is provided so that foreign matter or impact does not flow into the bearing supporting the worm shaft end.

The anti-rattle mechanism, which is installed in a narrow space in the housing that accommodates the worm shaft and the worm wheel, has an advantage when the quantity of parts constituting the anti-rattle mechanism is smaller when considering assembly and productivity.

However, in the structure in which the anti-rattle spring is applied as described above, the anti-rattle spring must be elastically supported by the plug member, and the foreign material or impact should be blocked by the bearing cover, so that separate assembly processes are required, and the resulting sample Excessive manufacturing time and excessive management parts contribute to lowering MDPS cost competitiveness.

Accordingly, the present invention has been invented in view of the above, and by providing a dual function to the plug portion forming the exterior, simultaneously implementing two functions in one process, reducing the assembly process, shortening the product manufacturing time and reducing the management parts. It is an object of the present invention to provide an anti-rattle mechanism of an electric steering apparatus that can secure not only quality but also cost competitiveness.

The present invention for achieving the above object, a state in which the anti-rattle mechanism of the electric steering apparatus is fixed on one side of the upper side of the motor housing, the other side of the opening of the bearing hole drilled in the side portion of the motor housing The end is characterized in that it comprises a plug cover that is fitted into the lower portion of the bearing hole fixed.

The plug cover is an anti-elastic load applied to the fixed end fixed to the outer portion of the motor housing by the fixing member and the pressing member is inserted into the bearing hole of the inner boss of the motor housing to press the bearing for supporting the end of the worm shaft A spring pressing end integrally connected to the fixed end to support the rattle spring, a cover integrally connected to the spring pressing end to cover the bearing hole side, and an end portion of the cover to be fixed to the lower portion of the bearing hole It consists of an extended insertion end.

The insertion end is fitted to the fitting projection protruding upward to have a groove shape using a motor housing in the lower portion of the bearing hole.

According to the present invention, it is possible to reduce the assembly process by implementing two functions in one assembly process by using the plug portion having a dual function, it is integrated into one component to shorten the time to manufacture the product and the quantity of management parts This not only secures cost competitiveness but also improves the quality of parts.

1 is an external configuration of the anti-rattle mechanism mounted to the worm shaft portion of the electric steering apparatus according to the present invention, Figure 2 is an internal configuration according to FIG.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

Figure 1 shows the external configuration of the anti-rattle mechanism mounted to the worm shaft portion of the electric steering apparatus according to the present invention.

As illustrated, the motor unit constituting the MDPS (Motor Driven Power Steering), which is an electric steering device, uses a worm shaft 1 engaged with the worm wheel 2 to transmit power and protect the internal components 4. )

The worm shaft 1 is engaged with the worm wheel 2 in an elongated shape that is rotated by receiving motor power, and the shaft end portion thereof is supported by a bearing 3 positioned inwardly of the motor housing 4. Have

An inner boss 4a having a bearing hole 4b communicated to the outside of the motor housing 4 protrudes into an inner space, and a bearing fixed inward of the bearing hole 4b of the inner boss 4a. 3) to support the shaft end of the worm shaft (1).

In addition, the bearing (3) part has an anti-rattle mechanism (5), the anti-rattle mechanism (5) to maintain the engagement between the worm shaft (1) and the worm wheel (2) by the load to press the bearing (3) side Prevents rattle noise

2 shows a configuration diagram of the anti-rattle mechanism according to the present embodiment.

As shown, the anti-rattle mechanism 5 has a pressing member 6 for vertically pressing the bearing 3 located on the inner boss 4a side of the motor housing 4 and the pressing member 6. The anti-rattle spring (7) applying elastic load and the anti-rattle spring (7) from the outside of the motor housing (4), and press the inner boss (4a) side of the motor housing (4) to block foreign foreign matter penetration It consists of a plug cover (8).

The anti-rattle spring 7 is accommodated in the inner space of the outer boss 4c protruding toward the inner boss 4a of the motor housing 4, and the outer boss 4c is another outer portion of the motor housing 4. Compared to the protruding appearance is protruding.

In the present embodiment, the plug cover 8 has a size and a length that can cover the side portion forming the inner boss 4a at the upper portion forming the appearance of the motor housing 4, and is made of a flexible material that is easy to bend. .

The plug cover 8 has a fixed end 8a fixed by a fixing member 9 fastened to an upper exterior part of the motor housing 4 to form one end portion, and prevents the anti-rattle spring 7 from blocking the motor. The multifunctional extension end which blocks together the bearing hole 4b which drilled in the side part of the housing 4 forms the shape which continued integrally with the said fixed end 8a.

The multifunctional extension end is composed of a spring pressing end 8b, which has a step from the fixed end 8a, and a cover 8c extending again at the end of the spring pressing end 8b.

The step of the spring pressing end 8b is due to the appearance that the outer boss 4c of the motor housing 4 protrudes so as to protrude from the other exterior portions of the motor housing 4.

The cover 8c is formed to have a size capable of completely covering the bearing hole 4b drilled in the side portion of the motor housing 4.

In the present embodiment, the cover 8c is fixed in various ways, but it is preferable that the cover 8c is fixed using the motor housing 4 without using a separate means.

To this end, in this embodiment, the insertion end (8d) protruding to the end of the cover (8c) is formed to extend, and the fitting jaw is formed in the side portion of the motor housing (4) to form a groove below the bearing hole (4b) Make (4d) extend upwards.

As described above, the plug cover 8 applied to the anti-rattle mechanism 5 according to the present embodiment is fastened to the upper exterior portion of the motor housing 4 by fastening the fixing end 8a together with the fixing member 9 such as a screw. It is possible to secure the fixing force of the plug cover (8).

When the fixing end 8a of the plug cover 8 is fixed with the fixing member 9, the end of the multifunctional extension end extending from the fixing end 8a is folded to the side of the motor housing 4, and then the end thereof. The insertion end 8d formed at the side is fitted into the fitting jaw 4d formed at the side of the motor housing 4.

As shown in FIG. 1 only by the assembly process, the plug cover 8 is fixed to the motor housing 4, and the spring pressing end 8b is supported while blocking the anti-rattle spring 7 side. The cover 8c side can block the bearing 3 exposed to the outside from the outside.

In particular, in the present embodiment, the cover 8c portion that blocks the bearing 3 from the outside does not use the same method as caulking, and the motor housing 4 has an insertion end 8d formed at the end of the cover 8c. Since it is fitted toward the fitting jaw (4d) formed on the side portion of the, it is possible to greatly improve the ease of assembly without applying a complicated and difficult caulking process.

1: Worm shaft 2: Worm wheel
3: bearing 4: motor housing
4a: inner boss 4b: bearing hole
4c: outer boss 4d: fitting jaw
5: anti-rattle mechanism 6: pressing member
7: anti-rattle spring 8: plug cover
8a: Fixed End 8b: Spring Pressing End
8c: Cover 8d: Insertion End
9: fixing member

Claims (3)

One end is fixed at the upper side of the motor housing, the other side is composed of a plug cover which is fixed to the lower end of the bearing hole while the end is covered with the opening of the bearing hole drilled in the side portion of the motor housing Anti-rattle mechanism of the electric steering apparatus, characterized in that.
The method of claim 1, wherein the plug cover is fixed to the outer end of the motor housing fixed to the fixing member, and the pressing member is inserted into the bearing hole of the inner boss of the motor housing to press the bearing for supporting the end of the worm shaft A spring pressing end integrally connected to the fixed end, a cover integrally formed at the spring pressing end to cover the bearing hole side, and a lower portion of the bearing hole to be fixed to support the anti-rattle spring applying an elastic load; Anti-rattle mechanism of the electric steering apparatus, characterized in that the insertion end extending from the end of the cover.
The anti-rattle mechanism of the electric steering apparatus according to claim 2, wherein the insertion end is fitted to a fitting jaw protruding upwardly to have a groove shape by using a motor housing under the bearing hole.
KR1020100006044A 2010-01-22 2010-01-22 Anti- rattle assembly in motor driven power steering KR20110086358A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100006044A KR20110086358A (en) 2010-01-22 2010-01-22 Anti- rattle assembly in motor driven power steering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100006044A KR20110086358A (en) 2010-01-22 2010-01-22 Anti- rattle assembly in motor driven power steering

Publications (1)

Publication Number Publication Date
KR20110086358A true KR20110086358A (en) 2011-07-28

Family

ID=44922779

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100006044A KR20110086358A (en) 2010-01-22 2010-01-22 Anti- rattle assembly in motor driven power steering

Country Status (1)

Country Link
KR (1) KR20110086358A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150047300A (en) 2013-10-24 2015-05-04 현대모비스 주식회사 Anti Rattle Device of Moter Driving Power Steering

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150047300A (en) 2013-10-24 2015-05-04 현대모비스 주식회사 Anti Rattle Device of Moter Driving Power Steering

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