KR19990033586A - Anti-abrasion structure of automobile brake lining - Google Patents

Abstract

The present invention relates to an anti-abrasion structure of an automobile brake lining, the present invention is a problem of the prior art, that is, the contact surface of the anchor plate in contact with the lower surface of the first and second shoe is formed to be inclined at a constant angle, 1, The secondary shoe is moved to the rotational direction of the drum by the rotational force of the drum, and it is designed to solve the problems such as shortening of the brake lining, deterioration of braking force, and operation noise caused by wearing only a certain part of the brake lining. .

The present invention is the first and second shoes 20A and 20B which are extended to the left and right sides by the wheel cylinder 12 which is operated hydraulically during braking of the vehicle so that the rotating drum 50 and the brake lining 60 come into close contact with each other. The protrusions 22A and 22B are formed to be curved at each lower end surface of the c), and the grooves 32A and 32B are formed on both sides of the anchor plate 30 so that the protrusions 22A and 22B are inserted and closely contacted with each other. Both ends of the lower return spring 40 are fixed to the lower portions of the primary and secondary shoes 20A and 20B so that the protrusions 22A and 22B inserted into the groove portions 32A and 32B can be firmly adhered to each other. By operating the wheel cylinder 12, the primary and secondary shoes 20A and 20B are not moved by the rotational force of the drum 50, and the primary and secondary shoes 20A and 20B are always in vertical contact. , Useful invention that can extend the life by preventing the wear lining of the brake lining 60, minimizing the friction noise by the wear wear to be.

Description

Anti-abrasion structure of automobile brake lining

The present invention relates to an anti-abrasion structure of a brake lining for an automobile, and in particular, a protrusion is formed to be curved at a lower end surface of the first and second shoe that extends left and right, respectively, by the operation of a wheel cylinder during braking of the automobile. Concave grooves are formed on both sides of the anchor plate so that the protrusions of the secondary shoe are inserted into close contact with each other, and fixing holes for fixing both ends of the lower return spring are formed on each lower front surface of the first and second shoe. Brate lining attached to the outer side of the primary and secondary shoes during operation of the primary and secondary shoes by engaging the curved projections of the primary and secondary shoes inserted into the grooves so that they are coupled to the recesses and closely contact each other by the lower return springs. It is possible to make constant contact with the inner circumferential surface of the drum at a uniform pressure, thereby preventing the abrasion of the brake lining and extending the life of the lining. Prevent uneven wear relates to the structure of the automobile brake linings for which various noise can be minimized by Moe.

In general, a brake device of a vehicle is a device used to maintain a parking state at the same time as decelerating or stopping a driving vehicle, and such a brake system mainly uses friction force.

That is, the wheel cylinder actuated by hydraulic pressure expands the first and second shoes to the left and the right, so that the brake lining attached to the outer surface of each shoe contacts the inner circumferential surface of the drum rotating with the wheel to obtain braking force. .

There are many kinds of such friction braking devices, but the trailing shoe type that leads to the lower side of the first and second shoes on both sides of the anchor plate located at the bottom of the back plate, and the upper part of the shoe extends to the left and right sides during braking. As described above, when the wheel cylinders are operated, the first and second shoes are simultaneously extended to the left and right around the anchor plate, thereby obtaining a large braking force when moving forward and backward.

However, this conventional riding trailing shoe type has a contact pressure for the first and second shoe to move in the rotational direction of the drum by contacting the brake lining while the brake drum rotates during operation of the wheel cylinder. It occurred unevenly, causing the brake linings to wear out unevenly.

That is, as shown in FIG. 1, when the wheel cylinder C is operated when the drum A rotates in the direction of the arrow B, the primary shoe D and the secondary shoe E are respectively. The first and second shoe (D, E) is extended to the left and right, at this time is the force to move in the direction of the arrow (F) by the rotational force of the drum (A), which is in close contact with the inner peripheral surface of the drum (A) As shown in the brake linings G and H, the lower end G-1 of the lining G of the primary shoe D and the upper end H-1 of the lining H of the secondary shoe E are excessive. Wear, and the upper end (G-2) of the lining (G) of the primary shoe (D) is worn a small amount, the lower end (H-2) of the lining (H) of the secondary shoe (E) is hardly contacted. .

As described above, the phenomenon in which the brake linings G and H are unweared is shown in FIG. 2, in which the lower end surfaces of the first and second shoe shoes D and E come into contact with each other. 1) is formed to be inclined at a predetermined angle so that the lower end surfaces of the first and second shoes D and E slide on the contact surface I-1 of the anchor plate I due to the rotational force of the drum A. This is because the lower return spring J, which pulls the lower ends of the first and second shoes D and E, is in contact with the curved lower surface of the anchor plate I and is pulled out. It is a phenomenon that occurs because the shoe (D, E) can not be combined firmly.

The present invention has been made in order to solve the problems of the prior art as described above, the technical problem of the present invention is the lower surface of the first and second shoe is extended to the left and right by the wheel cylinder actuated hydraulically during braking of the vehicle By deforming the coupling part of the anchor plate, the wear lining of the brake lining can be prevented, thereby extending the life of the brake lining, minimizing the noise caused by the wear and tear, and preventing the braking of the brake lining for the automobile which can improve the braking force. To provide structure.

The technical problem of the present invention as described above is a wheel cylinder for extending the first and second shoes to the left and right by hydraulic pressure during braking of the vehicle, the anchor plate which the bottom surface of the first and second shoes contact, and the 1 A lower return spring having both ends fixed to a lower portion of the secondary shoe, a brake lining attached to an outer surface of the first and second shoe, and in close contact with an inner surface of the brake drum, and the first and second shoe and the wheel cylinder are installed. In the brake device for a vehicle comprising a back plate which is formed, a curved protrusion is formed on each lower end surface of the first and second shoe, and both ends of the lower return spring are fixed to each lower front surface of the first and second shoe. And a groove formed on both sides of the anchor plate such that the fixing holes are drilled, and the protrusions of the primary and secondary shoes extending to the left and right sides of the wheel cylinder are inserted and in close contact with each other. It is achieved by providing a wear protection structure of the brake lining for the.

1 is a view showing a brake device according to the prior art.

Figure 2 is a view showing a portion of the anchor plate contacting the lower end of the first and second shoe of the brake device according to the prior art.

Figure 3 is an enlarged view of the main portion showing the wear protection structure of the brake lining according to the present invention.

4 is a view showing an installation state of the present invention.

<Explanation of symbols for main parts of drawing>

10 back plate 12 wheel cylinder

20A, 20B: 1st and 2nd shoe 22A, 22B: protrusion

24A, 24B: Fixing hole 30: Anchor plate

32A, 32B: groove 40: lower return spring

50: brake drum 60: brake lining

Referring to the configuration and operation of the present invention having the features as described above in detail based on the accompanying drawings as follows.

In the accompanying drawings, Figure 3 is a view showing the wear-resistant structure of the brake lining according to the present invention, Figure 4 is a view showing the installation state of the present invention.

As shown in the accompanying drawings, the present invention is a wheel cylinder 12 for extending the first and second shoe 20A, 20B to the left and right by hydraulic pressure during braking of the vehicle, and the first and second shoe ( Anchor plate 30 to which the lower end surfaces of 20A and 20B are in contact with each other, a lower return spring 40 having both ends fixed to lower portions of the first and second shoe 20A and 20B, and the first and second shoe ( Brake lining 60 attached to the outer surface of the 20A, 20B and in close contact with the inner surface of the brake drum 50, and the back plate on which the primary and secondary shoes 20A, 20B and the wheel cylinder 12 are installed ( 10) In the brake device for an automobile composed of 10), the first and second shoe 20A, 20B having curved projections 22A, 22B formed on each lower end surface, and fixing holes 24A, 24B formed on each lower front surface. ), An anchor plate 30 having grooves 32A and 32B formed on both sides thereof so that the protrusions 22A and 22B of the first and second shoe 20A and 20B are inserted and in close contact with each other, and the anchor plate 30 is provided. Groove of It is composed of a lower return spring 40, both ends of which are fixed to fixing holes 24A, 24B formed on the lower front surface of the first and second shoe 20A, 20B, in which the protrusions 22A, 22B are inserted in the 32A, 32B. will be.

Hereinafter, reference numeral 1 denotes a first arrow, and 2 denotes a second arrow.

The operation of the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, in order to install the anti-abrasion structure of the brake lining according to the present invention to the brake device, the primary and secondary shoes 20A, which are extended left and right by wheel cylinders 12 mounted on the back plate 10, Each lower end surface of 20B) is curved to form hemispherical protrusions 22A and 22B.

When protrusions 22A and 22B are formed at the lower end surfaces of the first and second shoe 20A and 20B, fixing holes 24A and 24B are formed in each lower front surface of the first and second shoe 20A and 20B. Form.

This is for fixing both ends of the lower return spring (40).

When the protrusions 22A and 22B are formed at the lower end surfaces of the first and second shoe 20A and 20B, and fixing holes 24A and 24B are formed at both ends of the lower return spring 40 on the lower front surface. Grooves 32A and 32B are formed on both sides of the anchor plate 30 so that the protrusions 22A and 22B can be inserted therein.

In this state, the protrusions 22A and 22B formed on the lower ends of the first and second shoe 20A and 20B are respectively inserted into the recesses 32A and 32B of the anchor plate 30.

At this time, the grooves 32A and 32B and the protrusions 22A and 22B are formed in the same half arc shape, so that when the protrusions 22A and 22B are inserted into the grooves 32A and 32B, mutual contact is made. Done.

When the protrusions 22A and 22B of the primary and secondary shoes 20A and 20B are inserted into the recesses 32A and 32B of the anchor plate 30, the protrusions of the primary and secondary shoes 20A and 20B ( Both ends of the lower return spring 40 are fixed to the fixing holes 24A and 24B of the primary and secondary shoes 20A and 20B so that the 22A and 22B are tightly coupled to the groove portions 32A and 32B. do.

Thus, the protrusions 22A and 22B formed on the lower ends of the first and second shoe 20A and 20B are inserted into the recesses 32A and 32B of the anchor plate 30, and the protrusions 22A and 22B are The lower return spring 40 may be coupled to the grooves 32A and 32B more firmly.

As described above, the driver brakes the vehicle in a state in which the protrusions 22A and 22B of the first and second shoe 20A and 20B are in close contact with the recesses 32A and 32B of the anchor plate 30. When the brake pedal (not shown) is pressed, the first and second shoe 20A and 20B are respectively extended left and right by wheel cylinders 12 that are hydraulically operated. 20A and 20B have upper ends extending left and right about the anchor plate 30.

This is because the projections 22A and 22B of the lower surfaces of the first and second shoe 20A and 20B are inserted into the recesses 32A and 32B of the anchor plate 30 and are coupled by the lower return spring 40. to be.

At this time, if the brake drum 50 rotates in the direction of the first arrow 1, the primary shoe 20A and the secondary shoe 20B are respectively rotated in the direction of the second arrow 2 by the rotational force of the drum 50. This phenomenon is because the curved projections 22A and 22B of the first and second shoe 20A and 20B are inserted into the recesses 32A and 32B of the curved anchor plate 30. The first and second shoes 20A and 20B are prevented from moving, and the upper and lower secondary shoes 20A and 20B extend at uniform contact pressures around the anchor plate 30.

That is, since the protrusions 22A and 22B and the recesses 32A and 32B are coupled like a ball joint, the protrusions 22A and 22B are applied to the first and second shoe 20A and 20B in any direction. ) Is always in vertical contact with the recesses 32A and 32B of the anchor plate 30 so that it is not detached, and the primary and secondary shoes 20A and 20B extended by the wheel cylinder 12 are uniform in pressure. As a result, the brake lining 60 is brought into close contact with the inner circumferential surface of the drum 50.

As described above, the first and second shoe 20A, 20B is formed by the coupling of the protrusions 22A, 22B formed on the bottom surface thereof with the recesses 32A, 32B of the anchor plate 30. Regardless of the rotational force, by expanding to a uniform pressure, the brake lining 60 attached to the outer circumferential surfaces of the primary and secondary shoes 20A and 20B may be worn uniformly.

On the other hand, in the anti-abrasion structure of the brake lining 60 according to the present invention, even if the brake drum 50 is rotated in the direction opposite to the first arrow 1, the same result as described above can be obtained.

In other words, the car can perform its functions regardless of whether the car is moving forward or backward.

The anti-abrasion structure of the brake lining for an automobile according to the present invention is extended to the left and right sides by a wheel cylinder actuated by hydraulic pressure during braking of the vehicle, and each lower surface of each of the first and second shoe to which the rotating drum and the brake lining come into close contact with each other. The protrusions are formed to be curved, and the grooves are formed on both sides of the anchor plate so that the protrusions are inserted into and closely contact each other. It is fixed to the lower part of the car shoe and prevents the wear of the brake lining by preventing the first and second shoe from being moved by the rotational force of the drum while the wheel cylinder is operated, and also making the first and second shoe always in vertical contact. It is possible to extend the life and to minimize the noise caused by uneven wear.

Claims (1)

Anchor plate to which the wheel cylinder 12 which extends the primary and secondary shoes 20A and 20B to the left and right sides by hydraulic pressure during braking of the vehicle and the lower surfaces of the primary and secondary shoes 20A and 20B are in contact with each other. 30, a lower return spring 40 having both ends fixed to the lower portions of the first and second shoe 20A, 20B, and the outer side of the first and second shoe 20A, 20B and a brake drum. In the brake device for automobiles which consists of the brake lining 60 in close contact with the inner surface of the 50, and the back plate 10 in which the said 1st and 2nd shoe 20A, 20B and the wheel cylinder 12 are installed, The said Curved protrusions 22A and 22B are formed on the lower end faces of the first and second shoe 20A and 20B, and the lower return spring 40 is formed on each lower front surface of the first and second shoe 20A and 20B. Perforations of the fixing holes 24A and 24B fixed at both ends thereof, and protrusions 22A and 22B of the primary and secondary shoes 20A and 20B are extended to the left and right sides when the wheel cylinder 12 is operated. The anchor play Imbalanced abrasion preventive structure of the vehicle for the brake lining, characterized in that on both sides of the root 30 is formed with a groove (32A, 32B).