KR100433925B1 - Apparatus for scorching of a brake shoe for drum brake - Google Patents

Abstract

The present invention is a coaching treatment apparatus for a brake shoe for drum brake brakes for scouring the friction material 16 of the brake shoe 10 with the friction material 16 attached to the outer surface of the back plate 12 having the mounting plate 14 It is about. According to the present invention, the mounting plate 24 is disposed in the center of the base 22 and the mounting plate 14 of the brake shoe 10 can be placed on the outer circumferential surface side opposite to the drive shaft 24 in the radial direction. A mounting plate arrangement surface 30 having a shape corresponding to the outline of (14) and having a pin hole 32 for fixing the mounting plate 14 is formed, and the shaft extension portion 38 is formed above the drive shaft 24. Formed by the jig coupling pin 44 is extended to the lower side and the relay plate 40 is fixed to the cam coupling pin 46 is extended to the upper side, the cam coupling pin of the relay plate 40 on the shaft extension portion 38 The elliptical cam plate 52 having the pin holes 54 and 54 'into which the 46 is inserted is coupled, and brake shoes 10 are provided at both sides of the shoe batch jig 28 at the same height as the upper surface of the base 22. Heat treatment blocks 62 and 62 'having an arc-shaped heat treatment inner peripheral surface 58 corresponding to a circle formed by the main surface of the friction material 16) The heat treatment blocks 62 and 62 'are supported by the compression spring 68 toward the shoe batch jig 28, and rollers 70 and 70' are placed in the upper center of the heat treatment blocks 62 and 62 '. The main surface of the cam plate 52 is in contact with each other.

Description

Scoring treatment device for drum brake brake shoe {APPARATUS FOR SCORCHING OF A BRAKE SHOE FOR DRUM BRAKE}

The present invention relates to a scouring treatment apparatus for a brake shoe for drum brake. In particular, the present invention relates to a scouring treatment apparatus for a brake shoe for drum brake brake shoes that heat-treats the surface of the arc-shaped lining friction material of the brake shoe for drum brakes so that effective initial frictional energy can be generated at the beginning of use of the brake shoe.

In general, the brake pad for disc brakes has its friction material in contact with a flat brake disc surface, and the surface of the friction material has a flat surface. In general, the friction material is made of a composite material of an organic material and an inorganic material. On the other hand, such a friction material is made of a composite material of an organic material and an inorganic material as described above, and among the materials constituting the surface layer of the friction material in such a composite material, the organic material greatly reduces the friction rate during the initial friction process, so the surface of the friction material is heat treated. It is preferable to remove by. In the manufacture of such friction material, the surface is heat-treated to burn and carbonize and remove the organic material, which is called scorching treatment. In the case of a disc brake pad having a flat surface of the friction material, after the brake pad is manufactured, the surface of the friction material is disposed by placing the surface of the friction material in contact with the heated block on the heated plane, and then moving the surface of the friction material by relatively moving the friction material of the heating block and the brake pad. Scoring treatment by heat treatment is performed. Since the friction pad is scorched by the heat generated by the continuous friction with the brake disc when the brake pad is coated on the surface of the friction material, this scouring treatment causes the initial friction energy to be generated immediately after manufacture of the brake. The contact efficiency of the brake disc and the brake pad during the initial driving is to make the response as soon as possible.

In the above example, the surface of the friction material can be applied to the scouring process of the brake pad for disc brake. However, the brake shoes for drum brakes, which are in close contact with the inner circumferential surface of the cylindrical drum of the drum brake and can be braked, have a flat surface of the arc-shaped friction material because the lining friction material is formed in an arc shape and the surface thereof is also an arc shape. Scoring is not possible on merchant heating blocks.

In view of the above, the present invention has been made in view of the above, and the scouring treatment to heat-treat the surface of the arc-shaped friction material of the brake shoe for the drum brake to effectively generate the initial friction energy in the initial use of the brake shoe It is an object of the present invention to provide a scouring treatment apparatus for brake shoes for drum brakes.

To this end, in the present invention, there is provided a coaching treatment apparatus for a brake shoe for a drum brake for scouring a friction material of a brake shoe with a friction material attached to an outer surface of a back plate having a mounting plate. According to the present invention, the pin hole for fixing the mounting plate has a shape corresponding to the outer shape of the mounting plate so that the drive shaft is disposed in the center of the base and the mounting plate of the brake shoe can be placed on the outer peripheral surface side opposite to the drive shaft in the radial direction. The mounting plate arrangement surface is formed, the shaft extension part is formed on the upper side of the drive shaft, and the jig coupling pin is extended to the lower side, and the relay plate on which the cam coupling pin is extended is fixed to the upper side, and the cam coupling pin of the relay plate is on the upper side of the shaft extension part. The elliptical cam plate is formed with an inserted pin hole, and at the same height as the upper surface of the base, both sides of the shoe batch jig have an arc-shaped heat treatment inner circumferential surface corresponding to a circle formed by the main surface of the friction material of the brake shoe. Heat treatment block is placed and the heat treatment block is supported by the compression spring toward the shoe batch jig side. Ipseol the roller in the central portion to the main surface of the cam plate is arranged to be in contact.

Referring to the present invention in more detail based on the accompanying drawings as follows.

1 is a perspective view of a brake shoe for a drum brake.

2 is a cross-sectional view of the same.

Figure 3 is a plan view showing the scouring treatment apparatus of the brake shoe for drum brake of the present invention by separating the semi-circular heat treatment block cam.

Figure 4 is a partially exploded perspective view of the device of the present invention in which the brake shoe for the drum brake is disposed on the main surface, and disassembled and displayed the shoe batch jig to rotate it.

FIG. 5 is a plan view similar to FIG. 3 showing a semicircular heat treatment block in close contact with the outer surface of the brake shoe by operation of a cam;

Figure 6 is a front view showing a state in which the semi-circular heat treatment block is separated from the outer surface of the brake shoe by the operation of the cam in partial cross section.

Figure 7 is a front view showing a state in which the semi-circular heat treatment block is in close contact with the outer surface of the brake shoe by the operation of the cam and the relay plate is coupled to the shoe batch jig in a partial cross section.

8 is a cross-sectional view taken along line VIII-VIII of FIG. 6 showing a semicircular heat treatment block separated from the outer surface of the brake shoe by the operation of the cam;

Fig. 9 is a sectional view similar to Fig. 8 in which the semicircular heat treatment block is in close contact with the outer surface of the brake shoe by the operation of the cam.

Explanation of Signs of Major Parts of Drawings

10 ... Breakshoe 12 ... Backplate

14 ... mounting plate 16 ... friction material

24 ... Drive shaft 28 ... Shoe batch jig

38 ... shaft extension 40 ... relay board

44 ... Jig coupling pin 46 ... Cam coupling pin

52 ... Campan 54, 54 '... Pinball

58. Heat treatment inner circumference 62, 62 '... Heat treatment block

Fig. 1 shows a brake shoe 10 for a drum brake to be scorched by the apparatus of the present invention. The brake shoe 10 extends perpendicularly to the center of the arcuate back plate 12 and the inner circumferential surface of the back plate 12 so as to be mounted on a brake actuating element (not shown). And an arcuate friction material 16 constituting a lining which is a substantial braking means is attached to the outer surface of the back plate 12. This type of brake shoe 10 is well known, and it is also well known that the mounting plate 14 has a shape and mounting means according to the structure of the brake actuating element to which it is fixed. In the example of the present invention, the mounting plate 14 has one mounting hole 18 and one mounting hole 20 as mounting means, but the mounting means of the mounting plate 14 is designed as a brake pad. It may be configured in various ways. However, in the present invention, for the sake of explanation, a single mounting hole 18 and a mounting hole 20 are described.

The apparatus of the present invention heat treats the surface of the arc-shaped friction material 16 of the brake shoe 10 to undergo scorching.

3, 4 and 6, the configuration of the coaching brake treating apparatus for the drum brake of the present invention will be described.

In the center of the fixed base 22, a drive shaft 24 capable of rotating and lifting by an electric motor (not shown) and a solenoid operating mechanism (also not shown) is disposed. On the base 22, a shoe arrangement jig 28 is mounted on the drive shaft 24, through which the two brake shoes 10 are disposed, which are coupled via the shaft hole 26 and are opposed to the outer circumferential surface in the radial direction.

As shown in Fig. 4, the shoe batch jig 28 has a disk shape as a whole, and the mounting plate 14 of the brake shoe 10 is placed at a radially opposite position where two brake shoes 10 are arranged. The mounting plate placement surface 30 is formed in the middle of the main surface of the shoe placement jig 28 so that the mounting plate 14 can be fitted. A pin hole 32 is formed at a position corresponding to the mounting hole 18 of the mounting plate 14, and the mounting plate 20 has a pin hole 32 at the position corresponding to the mounting hole 20. The fixing protrusion 34 to be inserted is formed.

The brake shoe 10 fixed to the shoe placement jig 28 is fixed to the mounting hole 14 when the mounting plate 14 is fixed to the mounting placement surface 30 so that the mounting hole 18 matches the pin hole 32. 34 is inserted into the attachment hole 20, and the outer surface of the friction material 16 is arrange | positioned so that it may protrude outward from the main surface of the shoe batch jig 28. As shown in FIG.

An axial extension 38 extends above the drive shaft 24 extending upward through the shaft hole 26 of the shoe batch jig 28. The disc-shaped relay plate 40 is fixed to the shaft extension portion 38. The pin assembly 48, 48 ′ with the jig coupling pin 44 extending downward and the cam coupling pin 46 extending upward is helically coupled near the periphery of the relay plate 40.

On the upper side of the relay plate 40, an elliptical cam plate 52 is coupled to the upper shaft extension 38 of the drive shaft 24 through a central through hole 50, and the cam plate 52 is mounted on the relay plate 40. Pin holes 54 and 54 'to which the cam coupling pins 46 of the assembled pin assemblies 48 and 48' can be inserted and coupled are formed, and between the relay plate 40 and the cam plate 52 is extended. A coil spring 56 inserted into 38 is interposed.

On both sides of the shoe batch jig 28 at the same height as the upper surface of the base 22, the surface coincides with a circle formed by the main surface of the friction material 16 of the brake shoe 10 disposed on the shoe batch jig 28. Heat treatment blocks 62 and 62 'having a roughened arc-shaped heat treatment inner circumferential surface 58 and a heating wire 60 therein are disposed to face each other. The heat treatment blocks 62 and 62 'are coupled to guide bars 66 extending from both ends to guides 64 and 64' on both sides, and the guide bars 66 are fixed to the guides 64 and 64. Compression springs 68 are respectively disposed between ') and the heat treatment blocks 62 and 62' to hold the heat treatment blocks 62 and 62 'toward the shoe batch jig 28 side.

In the upper center of the heat treatment blocks 62 and 62 ', rollers 70 and 70' are formed with respective shaft rods 72, and the cam plate 52 is formed inside the rollers 70 and 70 '. The main surface is arranged to be in contact.

This operation of the present invention is as follows.

In order to arrange the brake shoe 10 to be scorched on the first shoe batch jig 28, the drive shaft 24 is raised to allow the relay plate 40 to be raised. At this time, the relay plate 40 is raised so that the cam coupling pins 46 of the pin assemblies 48 and 48 'mounted on the relay plate 40 are coupled to the corresponding pin holes 54 and 54' of the cam plate 52. do. As such, the relay plate 40 and the cam plate 52 may be coupled by the cam coupling pins 46 of the pin assemblies 48 and 48 ′ to transmit the driving force of the driving shaft 24 to the cam plate 52.

As such, the cam plate 52 is rotated by rotating the drive shaft 24 while the relay plate 40 and the cam plate 52 are coupled by the cam coupling pins 46 of the pin assemblies 48 and 48 '. The heat treatment blocks 62 and 62 'are placed on the shoe so that the main surface of the cam plate 52, on which the long axis of the cam plate 52 extends, is in contact with the rollers 70 and 70' of the heat treatment blocks 62 and 62 '. It is placed in the position farthest from the main surface of the jig 28 (see Figs. 3 and 6). At this time, the heat treatment blocks 62 and 62 'are guided by guide rods 66 extending from both ends to the fixing rods 64 and 64' on both sides, and the heat treatment blocks 62 and 64 'and the heat treatment block 62. Between 62 ', it is moved in the direction away from the shoe batch jig 28, compressing it against the elasticity of the compression spring 68.

The cam plate 52 is rotated so that its long axis line coincides with the line extending the rollers 70 and 70 'on the heat treatment blocks 62 and 62' so that the heat treatment block 620 (62 ') becomes the shoe batch jig ( The brake shoe 10 is disposed in the shoe batch jig 28 when placed at a position far from 28.

Two brake shoes 10 are arranged in pairs of shoe batch jigs 28 in pairs. The brake shoe 10 has mounting surfaces 14 extending from the back plate 12 to which the friction material 16 is attached to both sides of the shoe placement jig 28 formed in accordance with the shape of the mounting plate 14. 30). At this time, the brake shoe 10 fixed to the shoe arrangement jig 28 has a mounting hole 18 of the mounting plate 14 when the mounting plate 14 is fixed to the mounting arrangement surface 30. It matches with the pin hole 32 of 30, and the fixing protrusion 34 is inserted into the mounting hole 20, and the outer surface of the friction material 16 is arrange | positioned so that it may protrude outward from the main surface of the shoe batch jig 28.

Thus, after the brake shoe 10 is arrange | positioned to the shoe batch jig 28, the drive shaft 24 rotates. The rotation of the drive shaft causes the cam plate 52 to rotate through the relay plate 40 so that its long axis is perpendicular to the extension line extending the rollers 70 and 70 ', thereby contacting the main surface of the cam plate 52. Through the rollers 70 and 70 ', elasticity of the compression spring 68 disposed on the guide rod 66 of the heat treatment blocks 62 and 62' is applied to the heat treatment blocks 62 and 62 '. The heat treatment inner circumferential surface 58 comes into contact with the friction material 16 of the brake shoe 10 disposed on the shoe batch jig 28.

Thereafter, the drive shaft 24 is lowered. When the driving shaft 24 descends, the relay plate 40 disposed on the shaft extension 38 of the driving shaft 24 is lowered together with the driving shaft 24. When the relay plate 40 is lowered, the cam connecting pins 46 of the pin assemblies 48 and 48 'extending upward from the relay plate 40 are separated from the pin holes 54 and 54' of the cam plate 52. A jig coupling pin 44 which is separated and extends downward of the relay plate 40 is disposed on the mounting surface 30 of the shoe placement jig 28 and formed on the mounting plate 14 of the matched brake shoe 10. It is inserted into the pin hole 32 of the mounting hole 18 and the mounting arrangement surface 30 to fix the brake shoe 10 with respect to the shoe placement jig 28. Of course, this fixing is a brake shoe 10 with respect to the shoe batch jig 28 together with the fixing by the fixing projection 34 formed in the mounting surface 30 is inserted into the mounting hole 20 of the mounting plate 14. Fix it.

Thereafter, the drive shaft 24 rotates. The rotational force of the drive shaft 24 is the shoe arrangement through the mounting hole 18 formed in the mounting plate 14 of the brake shoe 10, the jig coupling pin 44 of the relay plate 40 is lowered the drive shaft 24 is lowered. Since it is coupled to the pin hole 32 of the jig 28, it is transmitted to the shoe batch jig 28 through the relay plate 40 and the jig coupling pin 44 to rotate the shoe batch jig 28.

Two brake shoes 10 are fixedly arranged on the main surface of the shoe batch jig 28, and the heat treatment block 62 is elastically disposed on the main surface of the friction material 16 of the brake shoe 10 by a compression spring 68. 62 ') and its heat treatment inner circumferential surface 58 is roughened and the heated state is maintained by the inner heating wire 60, so that the outer surface of the friction material 16 during the rotation of the shoe batch jig 28 is heat treated. The frictional friction of the brake shoe 10 occurs due to the high heat of the heat treatment blocks 62 and 62 'and the roughened surface of the heat treatment inner circumferential surface 58, causing rotational friction with respect to the heat treatment inner circumferential surface 58 of the blocks 62 and 62'. The friction material 16 is one whose surface is scorched.

As such, the friction material 16 of the brake shoe 10 which has been subjected to the scouring treatment may generate effective initial frictional energy at the initial use of the brake shoe 10.

After the scouring treatment, the above process may be performed in the reverse order to draw out the scouring brake shoe 10 from the shoe batch jig 28.

As described above, the present invention performs the scouring treatment of the surface of the arc-shaped friction material of the brake shoe for the drum brake by heat treatment, so that the initial friction energy can be effectively generated at the initial use of the brake shoe.

Claims (5)

In the coaching treatment apparatus of the brake shoe for drum brakes which scours the friction material 16 of the brake shoe 10 with the friction material 16 attached to the outer surface of the back plate 12 which has the mounting plate 14, The device is arranged through the drive shaft 24 and fixed to the shoe batch jig 28 for placing the brake shoe 10 on the outer circumferential surface side facing in the radial direction, the shaft extension 38 of the drive shaft 24, and the jig downward. Coupling pin 44 is extended and the upper side of the relay plate 40, the cam coupling pin 46 is extended, disposed on the shaft extending portion 38 and the cam coupling pin 46 of the relay plate 40 is inserted The oval cam plate 52 having the pin holes 54 and 54 'formed thereon and the friction material 16 of the brake shoe 10 disposed on both sides of the shoe batch jig 28 at the same height as the upper surface of the base 22. Drum block, characterized in that consisting of heat treatment blocks 62, 62 'having an arc-shaped heat treatment inner peripheral surface 58 corresponding to the circle formed by the main surface of the Scoring Treatment Device for Brake Shoe The method according to claim 1, wherein the mounting plate 14 has a shape that matches that of the mounting plate 14 so that the mounting plate 14 of the brake shoe 10 can be placed in the shoe placement jig 28. Apparatus characterized in that the pair of mounting plate arrangement surface (30) is formed so that the pin hole (32) for facing in the radial direction. An apparatus according to claim 1, characterized in that the heat treatment inner peripheral surface (58) of the heat treatment block (62) (62 ') is roughened. The device according to claim 1, wherein a heating wire (60) is arranged inside the heat treatment block (62) (62 '). 2. An apparatus according to claim 1, characterized in that the heat treatment block (62) (62 ') is arranged to be burnt towards the shoe batch jig (28) by the compression spring (68).