KR20170011647A - Drum brake for vehicle - Google Patents

Drum brake for vehicle Download PDF

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Publication number
KR20170011647A
KR20170011647A KR1020150104597A KR20150104597A KR20170011647A KR 20170011647 A KR20170011647 A KR 20170011647A KR 1020150104597 A KR1020150104597 A KR 1020150104597A KR 20150104597 A KR20150104597 A KR 20150104597A KR 20170011647 A KR20170011647 A KR 20170011647A
Authority
KR
South Korea
Prior art keywords
pinion
slot
pair
brake
sleeve
Prior art date
Application number
KR1020150104597A
Other languages
Korean (ko)
Inventor
권기혁
안상각
김재현
정대식
Original Assignee
이래오토모티브시스템 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 이래오토모티브시스템 주식회사 filed Critical 이래오토모티브시스템 주식회사
Priority to KR1020150104597A priority Critical patent/KR20170011647A/en
Publication of KR20170011647A publication Critical patent/KR20170011647A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/42—Slack adjusters mechanical non-automatic
    • F16D65/46—Slack adjusters mechanical non-automatic with screw-thread and nut
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
    • F16D51/18—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
    • F16D51/20—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

A drum brake for an automobile according to an embodiment of the present invention includes a backing plate fixed to a vehicle body, a pair of brake shoe pivotally mounted on the backing plate, and a sleeve portion having opposite ends supported by the pair of brake shoes, And teeth formed on one side of the sleeve so as to be inclined in one direction along the circumference of the outer circumference and forming a vertical plane in the other direction, and a slot is formed on the other side to rotate the slope side An external force is applied to the teeth to rotate the sleeve so as to move the sleeve to the pair of brake shoes or to separate the sleeve from the pair of brake shoe And includes a pinion. According to the present invention, the pinion is supported by the pressing tool to form a slot through which the force is transmitted, the pinion is rotated in the forward direction through the teeth, and the pinion is rotated in the reverse direction through the slot, It is possible to rotate the pinion in the opposite direction sufficiently even in a narrow space. Further, since the slot stably supports the pressing tool to prevent the pressing tool from slipping or being separated from the pinion, Can be prevented.

Description

[0001] DRUM BRAKE FOR VEHICLE [0002]

The present invention relates to a drum brake for an automobile.

Generally, the drum brake is provided with a gap adjusting device for adjusting the gap by enlarging the outer diameter of the brake shoe in order to adjust the gap between the drum and the brake shoe.

The gap regulating device is disposed between the pair of brake shoes to press the pair of brake shoes outward to adjust the gap between the drum and the brake shoes.

More specifically, the gap adjusting device includes a sleeve coupled to each of the pair of brake shoe, and a pinion, which is formed in a hollow tubular shape inside and hollowed to the sleeve and rotatably moves the sleeve outwardly or inwardly.

That is, the operator can rotate the pinion clockwise or counterclockwise to adjust the gap between the pair of brake shoe and the drum by causing the threaded sleeve to be opened outward or narrowed inward.

At this time, teeth are formed on the periphery of the pinion, and the teeth are formed in different shapes on one side and the other side.

More specifically, one side of the tooth is formed as an inclined surface, and the other side of the tooth facing one side is formed as a vertical surface.

Therefore, when the brake drum is detached and mounted, the operator can rotate the pinion to the inclined surface side or rotate the pinion to the vertical surface side, thereby enlarging or reducing the outer diameter of the pair of brake shoes.

However, in the conventional brake drum, it is relatively easy to rotate the pinion to the inclined surface side, but there is a problem that it is practically difficult to rotate the pinion to the vertical surface side.

In other words, when rotating the pinion to the inclined surface side, the operator can press the vertical surface of the tooth to rotate the teeth. On the other hand, when the pinion is rotated to the vertical surface side, the inclined surface is pressed, It is difficult to precisely pressurize the workpiece. In addition, since the actual size of the pinion is small and the work space is narrow, the operator has a limitation in rotating the pinion to the vertical surface side.

In addition, the operator presses the inclined surface of the pinion using a rod-shaped tool in order to rotate the pinion in a narrow work space in a narrow working space, which causes the tool to slide from the inclined surface during pressing, There is a problem that the parts are damaged.

Korean Patent Publication No. 10-0534255

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to improve the structure of a pinion, so that a tool is stably supported on the pinion to easily rotate the pinion in a clockwise or counterclockwise direction A drum brake for an automobile.

According to an aspect of the present invention, there is provided an automotive drum brake including a backing plate fixed to a vehicle body, a pair of brake shoe pivotably mounted on the backing plate, And a tooth is formed on one side of the sleeve so as to form an inclined surface in one direction along the circumference of the outer circumference and forms a vertical surface in the other direction and a slot is formed on the other side of the sleeve, And when the rotation is required to the vertical surface side, an external force is applied to the slot to move the sleeve portion toward the pair of brake shoes, And a pinion spaced from the pair of brake shoe.

The slot may be formed to have a predetermined depth recessed from the side end in the longitudinal direction and open at one side, and a vertical support surface may be formed at a portion of the slot where the external force is applied.

The slots may be formed along the periphery of the other side of the pinion.

And a pressing tool inserted into the slot to press the pinion to rotate the pinion toward the vertical surface.

According to the present invention, the pinion is supported by the pressing tool to form a slot through which the force is transmitted, the pinion is rotated in the forward direction through the teeth, and the pinion is rotated in the reverse direction through the slot, It is possible to rotate the pinion in the opposite direction sufficiently even in a narrow space. Further, since the slot stably supports the pressing tool to prevent the pressing tool from slipping or being separated from the pinion, Can be prevented.

Further, the present invention can be applied to all drum brakes having sleeve portions of different specifications, and further, the shape or the quantity of the slots can be changed in the pinion, and the pinion can be classified and classified easily by specification.

1 is a schematic view of an automotive drum brake according to an embodiment of the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
3 is a perspective view showing a pinion of an automotive drum brake according to an embodiment of the present invention.
4 is a view schematically showing a state in which the pressing tool is seated in the slot.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line II-II in FIG. 1 for a vehicle according to an embodiment of the present invention. Fig. 4 is a schematic view showing a state in which the pressing tool is seated in the slot. Fig. 4 is a perspective view showing the pinion of the drum brake.

 Referring to FIG. 1, an automotive drum brake (hereinafter referred to as " automobile drum brake ") according to an embodiment of the present invention includes an inner surface of a drum (not shown) An apparatus for generating a braking force by pressing a lining 126 of a brake shoe 120 includes a backing plate 110 fixed to a vehicle body.

The backing plate 110 is formed in the shape of a circular disk and fixed to the vehicle body, and is equipped with a brake shoe 120 and a wheel cylinder 130, which will be described later, as shown in Fig.

In addition, the automotive drum brake includes a pair of brake shoes 120 mounted on the backing plate 110.

The brake shoe 120 is disposed on the left and right sides of the front surface of the backing plate 110, respectively, and functions to reduce the rotational force of the brake shoe 120 by compressing the drum shoe.

More in detail. The brake shoe 120 is pivotally mounted on the backing plate 110 so as to be selectively in contact with the inner surface of the drum and is provided with a pair of rims 122 A web 124, and a lining 126, as shown in FIG.

The rim 122 may be formed to have a predetermined thickness to serve as a frame, and the outer surface of the rim 122 may be formed to have a curved shape protruding outward. The web 124 is formed to extend in a direction perpendicular to the rim 122 and may serve to increase the rigidity to prevent deformation of the brake shoe 120 pressed on the drum.

In addition, the automotive drum brake may include a wheel cylinder 130.

The wheel cylinder 130 is mounted on the backing plate 110 so as to contact one end of the brake shoe 120 and can drive the brake shoe 120.

More specifically, when hydraulic pressure is applied to the wheel cylinder 130 from a master cylinder (not shown), the piston (not shown) of the wheel cylinder 130 protrudes to the outside to push out the brake shoe 120. So that the brake shoe 120 can be pressed onto the drum.

In addition, the automotive drum brake may include a return spring 180.

The return spring 180 is mounted on the lower end of the wheel cylinder 130 so as to be connected to the end of the pair of brake shoes 120 and includes a pair of brake shoes 120 Can be returned to the original position.

The drum brake of the present invention may include an anchor block 140 and a fixing spring 190.

1, the anchor block 140 is mounted on the backing plate 110 to fix the other end of the brake shoe 120 so that only one end of the brake shoe 120 is located outside . That is, one side of the brake shoe 120 is rotated outward by the wheel cylinder 130 and the other side is fixed by the anchor block 140 so that one side of the brake shoe 120 is connected to the wheel cylinder 130, To the drum.

The fixing spring 190 is mounted on the brake shoe 120 in parallel with the anchor block 140 and closely contacts the brake shoe 120 so as to be fixed to the anchor block 140. Therefore, one end of the brake shoe 120 can be opened by the fixing spring 190.

The drum brake of the present invention includes a sleeve portion 150 having both ends thereof held in contact with a pair of brake shoe 120.

1, the sleeve portion 150 is mounted on the brake shoe 120 to support a pair of brake shoe 120, and the brake shoe 120 is brought into close contact with the drum so as to contact the drum and the brake shoe 120 The gap formed between the lining 126 can be adjusted.

More specifically, the sleeve portion 150 is divided into one side and the other side, and each of the divided side and the other side can support a pair of brake shoe 120.

Illustratively, the plurality of divided sleeve portions 150 are threaded on the outer circumferential surface so that the pair of brake shoe 120 can be moved forward or rearward in accordance with the rotation of the pinion 160 Or screwed to the pinion 160 via a separate rotating shaft on which a thread is formed. However, the fastening structure of the sleeve unit 150 and the pinion 160 is not limited thereto, and may be changed into various structures and shapes within the scope of performing the same function.

In addition, the automotive drum brake includes a pinion 160 rotatably coupled to the sleeve portion 150.

1 and 2, the pinion 160 is rotatably coupled to the sleeve portion 150 to move the sleeve portion 150 toward the pair of brake shoe 120 through rotation, And can be separated from the brake shoe 120.

The pinion 160 is formed in a plurality of ring shapes having different diameters and is formed to be stepped along the axial direction. On one side where the diameter of the pinion 160 is relatively large, the inclined surfaces 161a And forming a vertical surface 161b in the other direction. A slot 163 is formed on the other side where the diameter is relatively small as compared with one side.

The slot 163 is formed in a shape that is recessed at a predetermined depth from the side end in the longitudinal direction of the pinion 160 and is open at one side. Of the portions where the slot 163 is formed, A vertical support surface 163a on which the tool is supported can be formed.

Illustratively, the portion (vertical support surface 163a) to which the pressing tool is abutted and abutted can be formed as a vertical surface so that the force transmitted from the pressing tool can be accurately transmitted to the pinion 160 without loss.

The slots 163 may be formed along the periphery of the outer surface of the other side of the pinion 160 and may be changed in depth and shape depending on the size, shape, structure, etc. of the sleeve 150 .

Therefore, when the pinion 160 needs to extend the outer diameter of the pair of brake shoes 120, that is, when the pinion 160 needs to be rotated toward the slope 161a, the teeth 161 (vertical surface 161b) When it is necessary to reduce the outer diameter of the pair of brake shoe 120, that is, to rotate the pinion 160 toward the vertical surface 161b, the slot 163 (the vertical support surface 163a) An external force is applied to rotate.

On the other hand, the automotive drum brake further includes a pressing tool.

3 and 4, the pressing tool is formed in a rod shape and is formed into a shape such that an end thereof can contact the vertical support surface 163a of the slot 163, and is inserted into the slot 163 to rotate the pinion 160 The pinion 160 can be rotated to the side of the vertical surface 161b of the tooth 161 by pressurization.

As described above, according to the present invention, the pinion 160 is supported by the pressing tool 170 to form a slot 163 through which the pinion 160 is rotated in the forward direction through the teeth 161, The outer diameter of the pair of brake shoe 120 can be easily expanded or reduced by rotating the pinion 160 in the reverse direction through the pinions 160 and 163 so that the pinion 160 can be rotated sufficiently in the reverse direction In addition, the slot 163 stably supports the pressing tool 170 to prevent the pressing tool 170 from slipping or being detached from the pinion 160, thereby preventing breakage of peripheral parts.

Further, the present invention can be applied to all the drum brakes having the sleeve unit 150 having different specifications, and further, the shape or the quantity of the slots 163 may be changed in the pinion 160 so that the pinion 160 is classified It can be easy.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes and modifications to the scope of the invention.

110. Backing plate
120. Brake Shoe
122. Rim 124. Web
126. Linings
Wheel cylinder
140. Anchor block
150. Sleeve portion
160. Pinion
161. Tooth
161a. Inclined surface 161b. Vertical plane
163. Slots
163a. Vertical support surface
170. Pressurization tool
180. Return spring
190. Fixing spring

Claims (4)

A backing plate fixed to the vehicle body,
A pair of brake shoes pivotally mounted on the backing plate,
A sleeve portion having both ends held in contact with the pair of brake shoes, respectively, and
A tooth is formed on one side of the sleeve portion so as to form a slope in one direction along a circumference of the circumference and forms a vertical surface in the other direction, and a slot is formed on the other side. When rotation is required to the slope side And when the rotation is required to the vertical surface side, an external force is applied to the slot to move the sleeve portion toward the pair of brake shoes, or a pinion for separating the sleeve from the pair of brake shoe
Wherein the drum brake is a drum brake. The method of claim 1,
Wherein the slot is formed in a shape that is recessed at a predetermined depth from a side end in the longitudinal direction and opened at one side,
And a vertical support surface is formed at a portion where the external force is applied to the slot formed portion. The method of claim 1,
The slot
And a plurality of teeth are formed along the periphery of the other outer peripheral surface of the pinion. The method of claim 1,
And a pressing tool inserted into the slot to press the pinion to rotate the pinion toward the vertical surface.
KR1020150104597A 2015-07-23 2015-07-23 Drum brake for vehicle KR20170011647A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150104597A KR20170011647A (en) 2015-07-23 2015-07-23 Drum brake for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150104597A KR20170011647A (en) 2015-07-23 2015-07-23 Drum brake for vehicle

Publications (1)

Publication Number Publication Date
KR20170011647A true KR20170011647A (en) 2017-02-02

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ID=58154249

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150104597A KR20170011647A (en) 2015-07-23 2015-07-23 Drum brake for vehicle

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018199596A3 (en) * 2017-04-26 2018-12-20 이강찬 Rotation link for operation machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100534255B1 (en) 2003-10-13 2005-12-08 기아자동차주식회사 Brake-shoe Structure of Drum Brake

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100534255B1 (en) 2003-10-13 2005-12-08 기아자동차주식회사 Brake-shoe Structure of Drum Brake

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018199596A3 (en) * 2017-04-26 2018-12-20 이강찬 Rotation link for operation machine

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