JPH11141579A - Float type calliper brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the follow-up performance of callipers, to suppress eccentric wear of a brake shoe resulting from uneven contacting, and to lessen fine vibration transmitted to a vehicle body. SOLUTION: A float type calliper brake device in which callipers are movable relative to a supporting frame, is equipped with two sleeves 18 and 18' where two parallel supporting pins 6 and 6' to couple the callipers with the supporting frame are fitted slidably and a vibration-proof rubber piece 21 furnished on the peripheries of the sleeves 18 and 18', wherein the supporting frame is furnished with mounting holes 22 and 22' in which the sleeves 18 and 18' are supported through the rubber piece 21. Thereby the follow-up performance of the callipers is stabilized, and eccentric wear of each brake shoe is suppressed, and fine vibration at the time of brake application is not likely transmitted to a vehicle body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake device used for railway vehicles and the like, and more particularly to a floating caliper brake device having a movable caliper for supporting a brake shoe.

[0002]

2. Description of the Related Art In a railway vehicle or the like, for example, a disk brake device as shown in FIGS. 2 and 3 is provided for each wheel, and a braking force is generated by friction when a brake shoe is pressed against a disk. .

[0003] As shown in the figure, a pair of brake shoes 2, 2 'are disposed on both sides of a disk 1 rotating integrally with a wheel with a predetermined gap from the disk surface. , 2 ′ are supported by a caliper 3.
One of the brake shoes 2 and 2 ′ (here, the brake shoe 2) is supported via a piston 4 provided on a caliper 3, and a disk is supplied by supplying a pressure fluid to an oil supply port 5 of the piston 4. It can be extruded toward 1.

On the other hand, the caliper 3 is connected to a support frame 7 by two parallel support pins 6 and 6 'which are parallel to the rotation axis O of the disk 1 and are equidistant from the rotation axis O. Can be moved in the axial direction of the support pin. Note that the support frame 7 is fixed to a predetermined position of the bogie with a plurality of bolts.

Here, the support structure in the support frame 7 will be described in detail.

FIG. 4 is a sectional view taken along the line AA in FIG. 3. As shown in FIG. 4, the upper support pin 6 is fitted on the spherical journal 9 of the spherical bearing 8 and is free to slide in the axial direction. And it is freely rotatable around the bearing center. Spherical bearing 8
Is fixed to a central portion of an upper stepped mounting hole 10 provided in the support frame 7 via a C-shaped retaining ring 11.

On the other hand, the lower support pin 6 ′ is
The outer periphery of the sleeve 12 is provided with a vibration-proof rubber 13 bonded by vulcanization and a collar 14 for preventing the rubber vibration-proof rubber 13 from coming off. Sleeve 12
Is fixed to the center of a lower stepped mounting hole 15 provided in the support frame 7 via a flat washer 16 and a C-shaped retaining ring 17 arranged on both sides of the collar 14.

With such a configuration, when the pressurized fluid is supplied from the oil supply port 5, the piston 4 operates to the extension side, and the brake shoe 2 is pushed out toward the disc 1, and the reaction force of the disc 1 The brake shoe 2 'arranged on the opposite side across the is drawn. As a result, the brake shoes 2, 2 'sandwich the disc 1 from both sides,
A braking force is generated by the friction at that time.

At this time, even if the brake shoes 2, 2 'do not contact the disc 1 uniformly and a force such as bending or twisting acts on the caliper 3, the caliper 3 moves in the axial direction of the support pin and the spherical bearing As it rotates about 8 and absorbs these forces, the brake shoes 2, 2 'and the disc 1 are automatically adjusted to make uniform contact.

[0010]

However, in such a conventional apparatus, the support pin 6 of the upper support portion is configured to rotate with respect to the center point of the spherical bearing 8, so that the rotation range is limited. Due to the mechanical limitation, the disc 1 and the brake shoes 2, 2 'are difficult to evenly contact (that is, the brake shoes cause one-sided contact), which causes uneven wear of the brake shoes 2, 2'. Accordingly, there is a problem that the life of the brake shoes 2, 2 'is significantly shortened.

Further, since the upper support structure is a mechanical support structure that does not involve the above-described vibration isolating rubber or the like, the load on the spherical bearing 8 is directly changed to the surrounding members such as the caliper 3 and the support frame 7. , And the load on the member was considerable. Furthermore, the vibration of the brakes 2, 2 'at the time of braking is transmitted directly to the vehicle body, which also impairs the quietness and riding comfort of the vehicle.

An anti-vibration rubber 13 is provided on the outer periphery of the sleeve 12 into which the lower support pin 6 'is fitted.
Conventionally, a sheet-like vibration-proof rubber is wound around the sleeve 12 and vulcanized and bonded, so that the processing is troublesome and time-consuming, resulting in an increase in cost.

The present invention has been made in view of these problems, and an object of the present invention is to provide a floating caliper brake device which has excellent followability and is easy to process.

[0014]

According to a first aspect of the present invention, there is provided a caliper for supporting a brake shoe, a support frame fixed to a predetermined position of a bogie, and two parallel supports for connecting the caliper and the support frame. A floating caliper brake device having a pin and a caliper movable in the axial direction of the support pin with respect to the support frame; two sleeves into which the two support pins are slidably fitted; And an anti-vibration rubber provided on an outer periphery of the support frame, and the two sleeves are supported in mounting holes formed in the support frame via the anti-vibration rubber.

According to a second aspect of the present invention, in the first aspect, an anti-vibration rubber press-fitted to the outer periphery of the enlarged diameter portion of the sleeve, and annular members arranged on both sides of the enlarged diameter portion supporting both sides of the anti-vibration rubber. Wherein the sleeve is locked to the inner periphery of the mounting hole via the annular member and the retaining ring.

[0016]

According to the first aspect of the present invention, the upper supporting portion has the same structure as the lower supporting portion, so that the degree of freedom of the rotation range is increased and the followability to the movement of the disk is improved. Can be. As a result, it is possible to prevent the brake shoe from hitting one side and to suppress the life from being shortened. In addition, since the upper and lower support pins are both supported via the vibration isolating rubber, the local load on surrounding members and the like is reduced, and the micro-vibration during braking is less likely to be transmitted to the vehicle body.

According to the second aspect of the present invention, by press-fitting the vibration-proof rubber to the outer periphery of the enlarged diameter portion of the sleeve, the operation of vulcanizing and bonding the vibration-proof rubber becomes unnecessary, and the processing time is greatly reduced.
Manufacturing costs can be reduced. In addition, the sleeve and the vibration isolating rubber can be prevented from falling off by the annular members such as washers arranged on both sides of the enlarged diameter portion.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The entire structure of the disc brake device is substantially the same as the conventional one shown in FIGS. 2 and 3, and therefore the description is omitted, and the support frame 7 which is a feature of the present invention is omitted.
The following description focuses on the support structure inside.

FIG. 1 shows an embodiment of the present invention, and FIG.
FIG. 13 corresponds to a cross-sectional view of FIG.

As shown in the figure, in the present invention, the two support pins 6, 6 'are slidably fitted to the sleeves 18, 18', respectively, and the sleeves 18, 18 'are each expanded to the center. It has diameter portions 19, 19 'and step portions 20, 20' formed on both sides thereof. A cylindrical anti-vibration rubber 21 is press-fitted on the outer periphery of the enlarged diameter portions 19 and 19 ′, and washers 23 are arranged on both sides of the enlarged diameter portions 19 and 19 ′. The washer 23 supports both sides of the vibration-proof rubber 21 and at the same time sandwiches the steps 20, 20 '. The sleeves 18, 18 ′ are locked at the central portions of the mounting holes 22, 22 ′ via washers 23, flat washers 24, and C-shaped retaining rings 25.

Next, the operation will be described.

During braking, the caliper 3 is appropriately moved in the axial direction of the support pin to prevent the brake shoe 2, 2 'from hitting one side. However, since the support structure of the support pins 6, 6' is the same for both upper and lower sides, The followability of the caliper 3 is stabilized, and uneven wear of the brake shoes 2, 2 'is minimized. And the support pin 6,
By supporting both 6 ′ via the vibration isolating rubber 21, the local load on the supporting member peripheral member is greatly reduced, and the micro vibration is prevented from being transmitted to the vehicle body.
Noise and vibration in the car are reduced.

Further, the vibration isolating rubber 21 is connected to the enlarged diameter portions 19, 19 '.
Since it is press-fitted to the outer periphery of the sheet, the processing time and the manufacturing cost are greatly reduced as compared with the conventional one in which a sheet-like vibration-proof rubber is wound and bonded by vulcanization. In addition, since the vibration isolating rubber 21 is not bonded, when the rubber is deteriorated, it is only necessary to replace the rubber, and the maintainability is improved.

Further, since the washers 23 supporting both sides of the vibration isolating rubber simultaneously sandwich the steps 20, 20 ',
The movement of the sleeves 18, 18 ′ in the axial direction of the support pins is restricted, so that the sleeves 18, 18 ′ and the vibration-proof rubber 21 can be prevented from coming off. This eliminates the necessity of a collar for preventing detachment, which is conventionally provided on the outer periphery of the sleeve, thereby improving the yield of the sleeve as a shaved product.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a support structure according to an embodiment of the present invention.

FIG. 2 is a plan view of a conventional floating caliper brake device.

FIG. 3 is a front view of the same.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

[Explanation of symbols]

 2, 2 'brake shoe 3 caliper 6, 6' support pin 7 support frame 18, 18 'sleeve 19, 19' enlarged diameter portion 21 anti-vibration rubber

Claims (2)

[Claims] A caliper for supporting a brake shoe, a support frame fixed to a predetermined position of a bogie, and two parallel support pins for connecting the caliper and the support frame, wherein the caliper is fixed to the support frame. A floating caliper brake device which is movable in the axial direction of the support pin, comprising: two sleeves in which the two support pins are slidably fitted; and an anti-vibration rubber provided on the outer periphery of the sleeve. Wherein the two sleeves are respectively supported in mounting holes formed in the support frame via the vibration-proof rubber. 2. An anti-vibration rubber press-fitted to the outer periphery of the expanded diameter portion of the sleeve, and annular members disposed on both sides of the expanded diameter portion supporting both sides of the anti-vibration rubber. 2. The floating caliper brake device according to claim 1, wherein the floating caliper brake device is locked to an inner periphery of the mounting hole via a retaining ring.