JPH06198380A - Brake shoe stripper - Google Patents

Abstract

PURPOSE:To exchange a brake liner in an extremely easy and sure manner when the brake liner of the tire is worn and exchanged, and to surely prevent the damages on the outer circumferential surface of the brake shoe. CONSTITUTION:A stripper body 1 which is located in an appropriate place, and a fixture device 2 which loads and supports a brake shoe S and a brake liner L of a tire for larger sized vehicle such as trucks and buses, and where a fixture 13 is appropriately supported in an adjustable manner, in a swayable manner in the right-to-left direction, and in the length adjustable manner in the radial direction through a supporting means, a swaying means, a guide means or the like are provided. A drill device 3 which successively punches the rivet which connects the brake shoe S supported by this fixture device 2 to the brake liner L by a rivet punching bar of the drill 33 is also provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake shoe stripper, which is mainly used when a tire tire of a large vehicle such as a truck or a bus is worn out and replaced.

[0002]

2. Description of the Related Art A conventional tire for a large vehicle has a pair of approximately half-moon shaped metal brake shoes which are symmetrically or vertically symmetrically arranged, and a brake liner such as asbestos is adhered to the outer peripheral surface of the brake shoes. Also, insert rivets into the mounting holes and counterbore holes that are provided at appropriate intervals in the brake liner, and insert the rivets so that their flanges are located on the counterbore side of the brake liner. Since the parts are formed on the side of the mounting holes of the brake shoes, when the brake liner of the tire is worn out and needs to be replaced, a cutting blade such as a grinder should be installed between the brake shoe and the brake liner. Forcibly insert the brake liner while cutting each rivet and forcibly scraping the brake liner from the outer peripheral surface of the brake shoe, and then adding each rivet on the brake shoe side. The part side had dropped hitting with a hammer or the like.

[0003]

However, when the brake liner of the tire is worn out and needs to be replaced, a shaving blade of a grinder or the like must be forcibly inserted between the brake shoe and the brake liner. It is necessary to forcibly remove the brake liner from the outer peripheral surface of the brake shoe while cutting each rivet, and to strike down the crimped part of each rivet on the brake shoe side with a hammer or the like. Moreover, it was extremely difficult and could not be surely done to replace the brake liner.

Further, after a shaving blade such as a grinder is forcibly inserted between the brake shoe and the brake liner to forcibly shave the brake liner from the outer peripheral surface of the brake shoe while cutting each rivet. , To knock off the crimping part of each rivet on the brake shoe side with a hammer,
There was a defect that the outer peripheral surface of the brake shoe was damaged.

Therefore, the present invention was created in order to solve the above problems, and when the brake liner of a tire is worn out and needs to be replaced, the brake liner can be replaced very easily and reliably. In addition, the present invention provides a brake shoe stripper capable of reliably preventing damage to the outer peripheral surface of the brake shoe.

[0006]

In order to achieve the above-mentioned object, the present invention has a stripper body installed at an appropriate place, and a brake shoe and a brake liner for tires of large vehicles such as trucks and buses. A fixture device that is placed and supported, and a drill device that sequentially punches out the rivets that connect the brake shoe and the brake liner, and the fixture device is a support arm on the upper front side of the stripper body. The rear end of the support arm is supported so that its height can be adjusted, and the front end of the support arm has a fixture for supporting and supporting a brake shoe and a brake liner, which is rocked in the left-right direction through a rocking means and a guide means. It is supported so that it can move freely and its length can be adjusted in the radial direction. Formed to provide a fixture locking mechanism for locking, while the drill apparatus,
A drive cylinder is rotatably and vertically movable on the front side of the stripper body, and a tubular drill for removing a caulking portion of a rivet is detachably supported on the lower part of the drive cylinder. Inside the drill, a rivet punching bar is supported movably up and down, and on the upper side of this rivet punching bar, a cylinder having a punch bar for pushing down the rivet punching bar to punch the rivet is provided downward, Further, a punch receiver is formed below the drill so as to support the height adjustable.

[0007]

When the brake liner of the tire of a large vehicle such as a truck or a bus is worn out and replaced by the technical means as described above, the stripper body should be installed at an appropriate place and replaced first. Adjust the height of the punch receiver of the drill device, the height of the support arm of the fixture device, and the radial length of the fixture of the fixture device according to the radius of the brake liner. In addition, place the brake shoes and brake liner of the tires of large vehicles such as trucks and buses on the fixture of the fixture device, and lock and support the fixture with the fixture lock mechanism at the position to punch the rivet. Then, after pushing down the drive tube of the drill device and scraping the caulking part of the rivet with the drill, Rivets punching bar parts is pressed downwardly Panchiba cylinder to successively punch as rivets downward.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The brake shoe stripper of the present invention is
As shown in FIGS. 1 to 8, a stripper body 1 installed at an appropriate location, a fixture device 2 for mounting and supporting a brake shoe S and a brake liner L of tires of a large vehicle such as a truck or a bus, It is composed of a drill device 3 that sequentially punches rivets R that connect a brake shoe S and a brake liner L supported by the fixture device 2.

That is, as shown in FIGS. 1 and 2, the stripper body 1 is formed so that a bed 5 is provided on the upper side of the base 4 and a column 6 is provided on the upper side of the bed 5.

As shown in FIGS. 1, 2, 4, 5, and 6, the fixture device 2 has a rear end portion of a support arm 7 on the front side of the column 6 of the stripper body 1. The height is freely adjustable in the vertical direction via a screw rod 9 having a handle 8 for moving up and down at the upper end, and the front end of this support arm 7 has a plurality of arcuate lower surfaces (three in the figure). ) A fixture 13 including a support plate 11 having lock grooves 10 at appropriate intervals and a pair of mounting plates 12 for mounting the brake shoe S and the brake liner L.
Is supported on the rocking plate 14B with the lock lever 14A via two guide bars 15 so as to be rockable in the left-right direction and the length thereof is adjustable in the radial direction. It is formed to have a fixture lock mechanism 16 that locks theture 13 in place.

In the fixture lock mechanism 16, a lock roller 17 for fitting each of the lock grooves 10 of the fixture 13 is rotatably supported on the lower side of the fixture 13 through a roller receiver 18 and the lower end thereof. A ball spline 20 provided with a petal 19 for pushing down the lock roller 17, a moving piece 21 provided on the ball spline 20 itself, and a fixing piece 22 provided on the front side of the bed 5 of the stripper main body 1. A coil spring 23 for upward resilience is inserted between the two and is supported by two bearings 24 so as to be vertically movable.

Further, the drill device 3 is shown in FIGS.
As shown in FIG. 3, the vertical center of the drive cylinder 24 is attached to the front side of the upper portion of the column 6 of the stripper main body 1 by the motor 25.
Pulley 26 and the pulley 2 of the substantially cylindrical upper support 27
8 is rotatably supported via a belt 29, and the vicinity of the lower portion of the drive cylinder 24 is provided on the front side of the central portion of the stripper main body 1 in the vertical direction of the column 6 inside the lower support body 30 having a substantially tubular shape. A cylindrical drill 3 for shaving the caulking portion C of the rivet R, which is movably supported in the vertical direction via a drive barrel moving mechanism 31 and has a cutting blade 32 at the lower end at the lower portion of the drive barrel 24.
3 is detachably supported via the drill chuck 34. A rivet punch bar 35 is provided inside the drive cylinder 24 and the drill 33. The rivet punch bar 35 is formed between the upper end flange piece 36 and the upper end of the drive cylinder 24 so that the lower end thereof is slightly projected downward from the lower end of the drill 33. Coil spring 3 for upward repulsion between each other
A cylinder 39 having a punch bar 38 for punching the rivet R by pushing the rivet punching bar 35 downward is mounted on the upper side of the rivet punching bar 35 by inserting 7 into the stripper. It is provided downward on the upper surface of the column 6 of the main body 1 via the bracket 40. And
On the lower side of the drill 33, when the rivet R is punched by pressing downward with the rivet punching bar 35 inside the driving cylinder 24 and the drill 33, the lower end of the rivet punching bar 35 hits the punch receiver 41. At the lower end for vertical movement of handle 4
A rivet receiving box 43 for supporting the rivet R punched by the rivet punching bar 35 is provided on the lower side of the punch receiver 41 so that the height of the rivet can be adjusted in the vertical direction. Has been done.

The drive cylinder moving mechanism 31 includes a lower support 3
The inner cylinder 44 and the outer cylinder 45 are provided on the inner side of 0, and the bearing 4 is provided on the upper and lower ends.
6 through which the column 6 of the lower support 30 is inserted.
A pinion 48 that engages with a rack 47 provided on the outer peripheral surface of the lower portion of the outer cylinder 45 and pushes down the drill 33 is provided on the lower side portion.
A handle 49 is provided, and the inner cylinder 44 and the outer cylinder 45 are further provided.
A coil spring 52 for pushing up the drill 33 is fitted between a holding plate 50 fixed to the upper end of the drill and a recess 51 provided in the upper portion of the lower support 30 on the column 6 side.

As a locking means for the fixture 13 of the fixture device 2, a plurality of lock grooves 10 are provided at appropriate intervals on the arcuate lower surface of the support plate 11 of the fixture 13, while the fixture lock mechanism is provided. A lock roller 17 is rotatably supported on the upper end of the ball spline 20 of 16 through a roller receiver 18, and the ball spline 20 is inserted into each lock groove 10 of the fixture 13.
Although it is shown in FIGS. 1 to 6 that the lock roller 17 of FIG.
As shown in FIG. 3, the fixture lock mechanism 1 is provided without providing anything on the arcuate lower surface of the support plate 11 of the fixture 13.
A pressure contact tool 53 is provided on the upper end of the ball spline 20 of 6,
Then, the press-contacting tool 53 of the ball spline 20 may be pressed against an appropriate position on the lower surface of the support plate 11 of the fixture 13.

Next, the use condition of the brake shoe stripper of the present invention will be described. Tires of large vehicles such as trucks and buses are drilled at appropriate positions on the brake shoes S and brake liners L at appropriate intervals as shown in FIG. The rivets R are respectively inserted into the mounting holes H1 and the counterbore holes H2 provided so that the flanges F thereof are located on the counterbore H2 side of the brake liner L, and the caulking portion C at the tip of the rivet R brakes. The shoe S is formed so as to be provided on the mounting hole H1 side, and when the brake liner L of this tire is worn out and is replaced, the stripper body 1 is installed at an appropriate place, and first, as shown in FIGS. Adjust the height of the punch receiver 41 of the drill device 3 by rotating the handle 42 according to the radius of the brake liner L to be replaced as shown in FIG.
The height of the support arm 7 of the fixture apparatus 2 is adjusted by rotating the handle 8 of the screw rod 9, and the radial length of the fixture 13 of the fixture apparatus 2 is adjusted by moving the lock lever 14A. . Next, after mounting the brake shoes S and the brake liner L of the tire of a large vehicle such as a truck or a bus on each mounting plate 12 of the fixture 13 of the fixture apparatus 2, the petal 19 of the fixture lock mechanism is put on the foot. And coil spring 2
In order to punch the rivet R by moving the ball spline 20 downward against the resilience of No. 3 fixture 1
The lock roller 17 at the upper end of the ball spline 20 is fitted and locked in the appropriate lock groove 10 of FIG. 3 by the upward resilience of the coil spring 23. Then, as shown in FIGS. 3 and 8A, the handle 49 of the drive cylinder moving mechanism 31 is rotated to engage the drive cylinder 24 of the drill device 3 with the coil spring 52 by the meshing means of the pinion 48 and the rack 47 of the outer cylinder 45. 8B, the drill 33 is rotated by the motor 25 as shown in FIG. 8B, and the caulking portion C of the rivet R is scraped off. Drive cylinder 2 as shown in
4 and the rivet punching bar 35 inside the drill 33 is pressed downward by the punch bar 38 of the cylinder 39 against the elastic force of the coil spring 37, and the rivet R is sequentially punched downward.
After punching out the rivet R, the drive cylinder 24 and the drill 33 are moved upward by the elastic force of the coil spring 37 and returned to the original position.

[0017]

That is, as described above, the brake shoe stripper of the present invention has the stripper body 1 installed at an appropriate place, the brake shoe S and the brake liner L of the tire of a large vehicle such as a truck or a bus. And a drill device 3 for sequentially punching out rivets R that connect the brake shoe S and the brake liner L to each other. The fixture device 2 is a member of the stripper body 1. The rear end of the support arm 7 is supported on the front side of the upper part in a height adjustable manner, and the front end of the support arm 7 has a brake shoe S and a brake liner L mounted and supported thereon.
Is supported by a swinging means and a guide means so as to be swingable in the left-right direction and adjustable in length in the radial direction, and a fixture for locking the fixture 13 at a proper position below the fixture 13. On the other hand, the drill device 3 supports the drive barrel 24 rotatably and vertically movable on the front side of the stripper main body 1, and the rivet R is attached to the lower portion of the drive barrel 24. A cylindrical drill 33 for removing the caulking portion C is detachably supported, and a rivet punching bar 35 is movably supported vertically inside the driving barrel 24 and the drill 33. A punch bar 3 for punching the rivet R by pushing this rivet punching bar 35 downward on the upper side of 35.
Since the cylinder 39 having 8 is provided downward and the punch receiver 41 is formed below the drill 33 so as to be adjustable in height, the brake liner L of the tire of a large vehicle such as a truck or a bus is provided. When worn and replaced,
The stripper body 1 is installed at an appropriate place, and first, the height of the punch receiver 41 of the drill device 3 and the height of the support arm 7 of the fixture device 2 are adjusted according to the radius of the brake liner L for replacement. And the length adjustment of the fixture 13 of the fixture device 2 in the radial direction are sequentially performed. Next, the brake shoe S and the brake liner L of the tire of a large vehicle such as a truck or a bus are placed on the fixture 13 of the fixture apparatus 2, and the rivet R is set.
The fixture 13 is locked and supported by the fixture lock mechanism 16 at a position for punching. Then, after the driving cylinder 24 of the drill device 3 is pushed down and the caulking portion C of the rivet R is scraped off by the drill 33, the rivet punching bar 35 inside the driving cylinder 24 and the drill 33 is moved to the punch bar 38 of the cylinder 39. Since the rivet R can be sequentially punched downward by pressing downward with, a shaving blade such as a grinder is forcibly inserted between the brake shoe and the brake liner as in the conventional case, or each rivet is pierced. The brake liner L can be cut very easily and securely without cutting the brake liner forcibly from the outer peripheral surface of the brake shoe or hammering off the crimped part of each rivet on the brake shoe side. Can be exchanged.

Moreover, the brake shoe S and the brake liner L for tires of large vehicles such as trucks and buses are placed and supported on the fixture device 2, and the drill shoe 3 connects the brake shoe S and the brake liner L. In order to sequentially punch out the rivets R that are being used, a shaving blade such as a grinder is forcibly inserted between the brake shoe and the brake liner as in the conventional case, and the brake liner is braked while cutting each rivet. It is possible to reliably prevent damage to the outer peripheral surface of the brake shoe L without forcing the caulking portion of each rivet on the brake shoe side with a hammer or the like after forcibly cutting from the outer peripheral surface of the brake shoe L.

[Brief description of drawings]

FIG. 1 is an overall side view of a partially cutaway showing an embodiment of the present invention.

FIG. 2 is an overall front view showing an embodiment of the present invention.

FIG. 3 is a vertical cross-sectional side view showing the drill device shown in FIGS. 1 and 2;

FIG. 4 is a partially cutaway front view showing the maximum radius state of the fixture of the fixture apparatus of FIGS. 1 and 2;

5 is a vertical cross-sectional side view showing a minimum radius state of a fixture of the fixture device of FIGS. 1 and 2. FIG.

6 is a partially cutaway front view showing the minimum radius state of the fixture of the fixture apparatus of FIGS. 1 and 2. FIG.

FIG. 7 is a partially cutaway front view showing another locking means of the fixture of the fixture apparatus shown in FIGS. 1 to 6;

FIG. 8 is a sectional view showing a rivet shaving state of the present invention,
(A) shows the state where the caulking part at the tip of the rivet is cut off with the drill of the drill device, (b) shows the state where the caulking part at the tip of the rivet has been shaved off with the drill of the drill device, and (c) shows the state where the riveting of the drill device is done. The rivet is punched out with the punch bar.

[Explanation of symbols]

1 Stripper body 2 Fixture device 3
Drill device 4 Base 5 Bed 6
Column 7 Support arm 8 Handle 9
Screw rod 10 Lock groove 11 Support plate 1
2 Mounting plate 13 Fixture 14A Lock lever 1
4B Oscillating plate 15 Guide bar 16 Fixture lock mechanism 17 Lock roller 18 Roller bearing 1
9 Petal 20 Ball Spline 21 Moving piece 2
2 Fixed piece 23 Coil spring 24 Drive tube 2
5 Motor 26 Pulley 27 Upper support 2
8 Pulley 29 Belt 30 Lower support 3
1 Drive tube moving mechanism 32 Cutting blade 33 Drill 3
4 Drill chuck 35 Rivet punching bar 36 Collar piece 3
7 Coil spring 38 Punch bar 39 Cylinder 4
0 Bracket 41 Punch holder 42 Handle 4
3 Rivet receiving box 44 Inner cylinder 45 Outer cylinder 4
6 Bearing 47 Rack 48 Pinion 4
9 Handle 50 Holding plate 51 Recess 5
2 Coil spring 53 Pressure contact C Crimping part F Flange H
1 Mounting hole H2 Counterbore hole L Brake liner R
Rivet S Brake shoe

Claims (1)

[Claims] 1. A stripper body installed at an appropriate place, a fixture device for mounting and supporting a brake shoe and a brake liner of a tire of a large vehicle such as a truck or a bus, and the brake shoe and the brake liner are connected to each other. It comprises a drill device for sequentially punching out the rivets, and the fixture device supports the rear end of the support arm on the front side of the upper part of the stripper body so that the height of the support arm is adjustable, and the front end of the support arm is supported. Supports a fixture, on which a brake shoe and a brake liner are mounted and supported, so as to be swingable in the left-right direction and to be adjustable in length in the radial direction by appropriately swinging means and guide means. The lower side is formed with a fixture lock mechanism that locks this fixture at an appropriate position. On the other hand, the drill device rotatably and vertically movable supports a drive barrel on the front side of the stripper body, and a tubular drill for removing a rivet swaged portion is detachably attached to the lower part of the drive barrel. A rivet punching bar is supported inside the drive cylinder and the drill so as to be vertically movable, and a punch bar that pushes the rivet punching bar downward and punches the rivet is supported on the upper side of the rivet punching bar. A brake shoe stripper, characterized in that a cylinder having the same is provided downward and a punch receiver is formed below a drill so as to support a height adjustable.