JP4593840B2 - Floating caliper brake device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floating caliper brake device used in a railway vehicle or the like.
[0002]
[Prior art]
2 and 3, a pair of brake elements 2 and 2 'are arranged on both sides of a disk 1 that rotates integrally with a wheel, with a predetermined clearance from the disk surface. The caliper 3 supports these control members 2 and 2 ', and either one of the control devices 2 or 2' (in this case, the control device 2) is supported by the caliper 3 via the piston 4, and the fluid pressure is reduced. When the piston 4 is extended by receiving the oil at the oil supply port 5, it is pushed out to the disk surface.
[0003]
The caliper 3 is supported by the support frame 7 so as to be movable in the operating direction of the control members 2 and 2 ′ by support pins 6 and 6 ′ that are arranged parallel to the rotation axis o of the disk 1 and equidistant from the rotation axis o. The The support frame 7 is fixed at a predetermined position of the carriage.
[0004]
4 is a cross-sectional view taken along the line AA in FIG. 3. The upper support pin 6 is free to slide in the axial direction on the journal 9 of the spherical bearing 8 and rotates (swings) within a predetermined range about the center p of the spherical bearing 8 as a fulcrum. Motion) Freely supported. Reference numeral 10 denotes a stepped hole (mounting hole) formed in the support frame 7, and the spherical bearing 8 is locked to the center of the stepped hole 10 via a C-type retaining ring 11. In addition, a pair of rubber bushes 12 are locked on both sides of the stepped hole 10 with the spherical bearing 8 interposed therebetween via a C-type retaining ring 13.
[0005]
FIG. 5 is a cross-sectional view taken along the line B-B of FIG. 3, and the lower support pin 6 ′ is supported by the sleeve 14 so as to be slidable in the axial direction. Reference numeral 15 denotes an anti-vibration rubber interposed between the sleeve 14 and the mounting hole 16 formed in the support frame 7, and is provided at the center of the outer periphery of the sleeve 14. The sleeve 14 is formed with flanges 17 at both ends, and is locked to the center of the mounting hole 16 from both sides of the flange 17 via a plain washer 18 and a C-shaped retaining ring 19. The anti-vibration rubber 15 is formed by vulcanizing and bonding a rubber sheet around the outer periphery of the sleeve 14 (in the middle of the flange portion 17).
[0006]
At the time of braking, when the piston 4 of the caliper 3 is extended, the control wheel 2 is pressed against the disk surface, and the reaction wheel 2 'on the opposite side sandwiching the disk 1 is attracted by the reaction force. As a result, the pair of restrictors 2 and 2 ′ sandwich the disc 1 from both sides and generate a frictional force (braking force) between the disc 1.
[0007]
At this time, even if the control members 2 and 2 ′ do not contact the disk surface uniformly, and the caliper 3 is bent or twisted, the caliper 3 moves in the operating direction of the control members 2 and 2 ′ and is a spherical bearing. Since the center P of 8 is swung around the fulcrum, the control members 2, 2 'and the disk surface are automatically adjusted so as to be in uniform contact.
[0008]
[Problems to be solved by the invention]
In the case of the support structure of FIG. 5, the anti-vibration rubber 15 is required to have sufficient elasticity (spring constant) to prevent contact between the support frame 7 and the flange portion 17. On the other hand, if the elasticity is increased too much, the follow-up performance is impaired. However, the elasticity of the anti-vibration rubber 15 is uniquely determined from the material and size (dimensions), and when vulcanized and bonded to the outer periphery of the sleeve 14, it is difficult to adjust the elasticity arbitrarily even if usage conditions change thereafter. It was difficult to obtain optimal elasticity for brakes with different conditions. Therefore, at present, in many cases, one kind of vulcanized anti-vibration rubber satisfying a certain degree of elasticity is supported for brakes having different conditions.
[0009]
In the case of the support structure shown in FIG. 5, since the sleeve 14 and the support pin 6 'are in metal contact, the sleeve 14 and the support pin 6' move relative to each other due to the movement of the disk 1 (wheel shake) and vibration, causing abnormal wear. There is a case.
[0010]
An object of the present invention is to provide effective countermeasure means for solving such problems.
[0011]
[Means for Solving the Problems]
A first aspect of the present invention is a caliper of placing the brake shoe on both sides of the disk, and a support frame which is fixed to a predetermined position of the carriage, wherein the caliper support frame via a supporting pin to the working direction of the brake shoe in floating caliper brake device comprising movable, rubber cushion and the support pin which is interposed between the sleeve freely fitted slide, and mounting holes formed in the support frame and the sleeve The sleeve is formed with an enlarged diameter portion at the center and stepped portions on both sides thereof, and the anti-vibration rubber is press-fitted on the outer periphery of the enlarged diameter portion and abuts against the stepped portion of the sleeve. An annular member and a C-type retaining ring that respectively locks the annular member on both sides of the enlarged diameter portion of the sleeve, and the annular member has a contact surface with an inner diameter side end surface of the vibration-proof rubber. A recess for receiving the C-type retaining ring; An outer diameter surface that forms a predetermined gap in which the anti-vibration rubber can bite between the inner diameter of the mounting hole on the support frame side, and a plain washer that is abutted against the periphery of the recess, And a C-type retaining ring for retaining a flat washer in the mounting hole of the support frame .
[0012]
The second invention is the floating caliper brake device according to the first invention, the anti-vibration rubber includes an inner diameter side end surface which is engaged with the annular member, the taper of the predetermined angle whose diameter toward the gap And an outer-diameter side end face set to the above.
[0013]
The third invention is the floating caliper brake device according to the first or second aspect, the sleeve, characterized in that it comprises a bush which forms the sliding surface and the support pin.
[0014]
【The invention's effect】
In the first aspect of the invention, when bending or twisting acts on the caliper during braking, these forces are absorbed by the deformation of the anti-vibration rubber, so that the brake is automatically brought into uniform contact with the disk surface. Adjusted. At that time, the side to be crushed of the anti-vibration rubber bites into the gap between the annular member and the support frame. When the gap is small, a large resistance is given to the anti-vibration rubber, and the elasticity (spring constant) of the anti-vibration rubber is increased. On the other hand, when the gap is large, the resistance given to the anti-vibration rubber is small and the anti-vibration is reduced. Rubber is easily deformed. Therefore, the elasticity of the vibration-proof rubber can be arbitrarily adjusted by managing the gap.
[0015]
In the second invention, when the taper angle applied to the outer diameter side end face of the vibration isolating rubber is changed, the amount of biting into the gap of the vibration isolating rubber (the magnitude of the resistance) for the same load changes. Therefore, the combination of the management of the gap and the management of the taper angle increases the degree of freedom of adjustment related to the elasticity of the anti-vibration rubber.
[0016]
In the third aspect of the invention, the bushing can improve the slidability and wear resistance between the support pin and the sleeve. As a result, the follower of the caliper is also improved, and the effect of preventing uneven wear of the brake device can be promoted.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a caliper support structure corresponding to FIGS. 4 and 5, and is applied to both the upper support structure and the lower support structure in the conventional example of FIGS. In addition, the same code | symbol is attached | subjected to the same components as FIGS.
[0018]
The sleeve 14a is formed with an enlarged diameter portion 20 in the center, and a cylindrical anti-vibration rubber 15a is press-fitted on the outer periphery thereof. Reference numeral 16 denotes a mounting hole formed in the support frame 7, and the vibration isolating rubber 15a is interposed between the mounting hole 16 and the sleeve 14a. Spacers 21 (annular members) are arranged on both sides of the enlarged diameter portion 20, and a predetermined gap 22 is formed between the mounting hole 16 so that the anti-vibration rubber 15 a can bite in.
[0019]
The spacer 21 includes an outer diameter surface 24 that forms a predetermined gap 22 between the contact surface 23 (regulation surface) with the inner diameter side end surface 28 of the vibration isolating rubber 15a and the inner periphery of the mounting hole 16, and a C-shaped stopper. A recess 25 for receiving the wheel 19a, and the periphery of the recess 25 is formed on the mating surface 26 with the flat washer 18a.
[0020]
The spacer 21 is abutted against both sides (steps) of the enlarged diameter portion 20 and is locked to the sleeve 14a via the C-type retaining ring 19a. In order to restrict the movement of the sleeve 14a in the axial direction, a flat washer 18a is abutted against the peripheral edge of the recess 25 of the spacer 21 and is locked to the mounting hole 16 via a C-type retaining ring 19b.
[0021]
The anti-vibration rubber 15 a is formed on both sides with an inner diameter side end face 28 that is locked to the spacer 21 and an outer diameter side end face 27 that becomes a small diameter with a predetermined taper angle toward the annular gap 22. When crushed, the outer diameter side end face 27 is deformed so as to bite into the gap 22.
[0022]
A DU bush 30 that forms a sliding surface with the support pin 6 (6 ′) is attached to the inner periphery of the sleeve 14a. Reference numeral 31 denotes an O-ring holding portion disposed on both sides of the DU bush 30, and the DU bush 30 is locked to the sleeve 14 a via the O-ring holding portion 31 and the C-type retaining ring 32.
[0023]
When the caliper 3 is bent or twisted during braking, these forces are absorbed by the deformation of the vibration isolating rubber 15a, so that the brake members 2, 2 'are automatically brought into uniform contact with the disk surface. Adjusted.
[0024]
At that time, the side to be crushed of the anti-vibration rubber 15a bites into the gap 22 between the sleeve 14a and the support frame 7, and prevents metal contact between the sleeve 14a and the support frame 7.
[0025]
If the gap 22 is small, a large resistance is applied to the bite of the rubber cushion 15a, while the elasticity of the rubber vibration isolator 15a (spring constant) increases, when the gap 22 is large, the resistance applied to the bite of the rubber vibration isolator 15a The vibration isolating rubber 15a is easily deformed. Therefore, the elasticity of the anti-vibration rubber 15a can be arbitrarily adjusted by managing the gap 22 without changing the material or the like.
[0026]
Changing the taper angle to be given to the outer diameter side end face 27 of the rubber cushion 15a, deformation of bite into the gap 22 of the rubber vibration isolator 15a to the same load changes. Therefore, by the combined use with the management of the management and the taper angle of the gap 22, the degree of freedom of adjustment of the elasticity of the rubber vibration isolator 15a is increased, it is the proper tuning damping rubber 15a can be easily obtained.
[0027]
Since the DU bush 30 is provided on the inner periphery of the sleeve 14a, the slidability and wear resistance between the support pin 6 (6 ') and the sleeve 14a are improved, so that the follower of the caliper 3 is also improved. The effect of preventing 2 'uneven wear is further promoted.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing an embodiment of the present invention. FIG. 2 is a front view of an entire configuration for explaining a conventional example.
FIG. 3 is a side view of the entire configuration.
FIG. 4 is a cross-sectional view taken along the line AA.
FIG. 5 is a cross-sectional view taken along the line BB.
[Explanation of symbols]
3 Caliper 6 (6 ') Support pin 7 Support frame 14a Sleeve 15a Anti-vibration rubber 20 Expanded diameter portion 21 Spacer (annular member)
22 Clearance 30 DU bush

Claims (3)

A caliper disposed on either side of the disc brake shoe, and a support frame which is fixed to a predetermined position of the carriage, provided with a, movable in the caliper to the support frame via a supporting pin to the working direction of the brake shoe In the floating caliper brake device,
Wherein comprising a sleeve support pin freely fitted slide, and a rubber vibration isolator interposed between the forming mounting holes of said support frame and said sleeve,
The sleeve has an enlarged diameter portion at the center and stepped portions on both sides thereof.
The anti-vibration rubber is pressure-fitted on the outer periphery of the enlarged diameter portion,
An annular member that is abutted against the step portion of the sleeve, and a C-type retaining ring that engages the annular member on both sides of the diameter-enlarged portion of the sleeve, respectively.
The annular member can bite the anti-vibration rubber between a contact surface with the inner-diameter side end surface of the anti-vibration rubber, a recess for receiving the C-type retaining ring, and an inner diameter of the mounting hole on the support frame side. An outer diameter surface that forms a predetermined gap,
A floating caliper brake device comprising: a flat washer that is abutted against a peripheral edge of the recess; and a C-type retaining ring that locks the flat washer in an attachment hole of the support frame . The anti-vibration rubber, claims, characterized in that it comprises an inner diameter side end surface which is engaged with the annular member, and an outer diameter side end face is set to a taper of the predetermined angle whose diameter toward the gap, the 2. The floating caliper brake device according to 1. The sleeve is floating caliper brake apparatus according to claim 1 or claim 2, characterized in that it comprises a bush which forms the sliding surface and the support pin.

Images