JP5399300B2 - Pad surface pressure stabilization mechanism - Google Patents

Description

  The present invention relates to a pad mounting mechanism for a railcar disc brake pad mounting mechanism for stabilizing the surface pressure of the pad protruding from the dovetail groove when the pad assembly is attached to a pad holder having a dovetail groove length defined. The present invention relates to a surface pressure stabilization mechanism.

As a conventional railway vehicle disc brake, for example, one disclosed in Patent Document 1 below is disclosed.
The configuration of the disc brake will be briefly described. The brake is arranged so as to face the rotor that rotates integrally with the wheel, and a caliper arm having a pair of base ends connected to the carriage frame, and a tip of the caliper arm. The attached pad holder, the pad assembly assembled to the pad holder, and the braking torque coupled to the pad holder at positions on both ends of the pad assembly in the direction in which the rotor slides on the pad assembly during braking. And receive an anchor block.
The pad assembly is attached to the pad holder by fitting a locking member fixed to the assembly into a dovetail groove formed on the pad holder on the tip side of the caliper arm, and both end portions of the dovetail groove on the pad holder side. The anchor block is fixed to the pad holder by a fixing means such as a bolt.

  By the way, in the pad mounting mechanism of the conventional railway vehicle disc brake as described above, when the length of the vertical dovetail groove of the pad holder is defined (for example, in the World Railroad Union UIC, the locking member attached to the pad assembly). When the pad assembly is assembled in the dovetail groove on the pad holder side, the pad assembly may protrude above and below the dovetail groove length part, and the surface pressure is not stable at the protruding pad part. There is a problem.

To further explain this point, in FIG. 2, (a) is a plan view of a pad holder according to an embodiment of the present invention, (b) is a plan view of a pad assembly according to an embodiment of the present invention, and (c) is a pad holder. FIG.
The pad assembly 5 shown in each figure is provided with a locking member 11 that fits into the dovetail groove 8 of the pad holder 4 attached to the caliper arm, and this locking member 11 fits into the above-mentioned dovetail groove 8. It is the composition which is united.
By the way, when the dovetail groove length A on the pad holder side is defined as described above, when the locking member 11 of the pad assembly is attached to the dovetail groove 8, the portion B where the pad assembly protrudes from the dovetail groove length is obtained. (Refer to (b) in 2 in the figure). In this way, the portion protruding from the dovetail groove 8 is usually given surface pressure by the anchor block 6 attached to both ends of the dovetail groove. A step may be formed between the surface of the holder and the pad side. When such a step is generated, there arises a problem that the surface pressure from the caliper arm is not stably applied to the entire brake pad.

JP 2000-161400 A

Therefore, the present invention provides a pad holder for preventing a step from being generated between the pad side surface of the pad holder and the pad side surface of the anchor block when the pad holder and the anchor block are assembled. A step (concave portion) is formed on the anchor block facing surface of the anchor block, a step (convex portion) that fits into the step (concave portion) is formed on the surface of the anchor block facing the pad holder, and a pad side of the anchor block and the pad holder is further formed. The heights of the above-mentioned convex portions and concave portions are formed to be substantially equal so that the surfaces are substantially the same surface.
When the convex portions thus formed are fitted into the concave portions and assembled together, no step is generated on the pad-side surface at the connecting portion between the anchor block and the pad holder. Moreover, the surface pressure of the entire pad can be stabilized by defining the position of the anchor block in the sleeper direction.

For this reason, the solution adopted by the present invention is:
By fitting the locking member attached to the pad assembly into the dovetail groove formed in the pad holder attached to the tip side of the caliper arm, the pad assembly is assembled to the pad holder and bolts etc. are attached to both ends of the dovetail groove on the pad holder side. In the railway disc brake in which the anchor block is fixed by the fixing means, a step is formed on the surface of the pad holder facing the anchor block, and further fitted on the step formed on the pad holder on the surface of the anchor block facing the pad holder. The step is formed, the both steps are fitted and assembled together, and when the both steps are assembled, the pad side surface of the anchor block and the pad side surface of the pad holder are substantially flush with each other. The pad surface pressure stabilization mechanism is characterized by being formed as described above .

According to the present invention, the pad holder is provided with a concave portion (step), the anchor block is provided with a convex portion (step), and the concave portion and the convex portion are fitted to each other so that the pad side surface of the pad holder and the anchor are fixed. This prevents a large level difference from being made between the surface of the block and the pad side. Also, with this configuration, pressure is applied to the protruding surface of the pad assembly through the convex surface of the anchor block, and the surface pressure of the entire pad can be stabilized.
In addition, when the anchor block is assembled to the pad holder and fixed with the fixing bolt, the anchor block is provided by the rotation of the fixing bolt when the uneven portion provided on the pad holder and the anchor block is fitted and the anchor block is screwed. It can be prevented from turning.
Further, it can be used as a detent of the anchor block so that the anchor block does not rotate due to the influence of vibration or the like.

FIG. 3 is a front view, a plan view, and a side view of a railway vehicle disc brake. (A) is a pad holder according to an embodiment of the present invention, (B) is a plan view of the pad assembly, and (C) is a side view of the pad holder. It is a principal part enlarged view of FIG.

  According to the present invention, the pad holder is provided with a recess (step), the anchor block is provided with a projection (step), and the pad-side surface of the pad holder and the anchor block This prevents a large step from being made between the pad side surface. With this configuration, pressure is applied to the protruding surface of the pad assembly through the convex surface of the anchor block, and the surface pressure of the entire pad can be stabilized.

Embodiments of a pad surface pressure stabilization mechanism according to the present invention will be described below with reference to the drawings.
FIG. 1 is a front view, a side view, and a plan view of a disk brake for a railway vehicle. In FIG. 2, (A) is a plan view of a pad holder, (B) is a plan view of a pad assembly attached to the pad holder, and (C) is a pad. FIG. 3 is a side view of the holder, and FIG. 3 is an enlarged side view of a main part of a joint portion between the anchor block and the pad holder.

  In FIG. 1, 1 is a support, 2 is a body, 3 is a caliper arm, 4 is a pad holder, 5 is a pad assembly, 6 is an anchor block, 7 is a fixing bolt, and a disk brake for a railway vehicle rotates integrally with a wheel. As shown in FIG. 1, a caliper arm 3 is disposed so as to sandwich a rotor (not shown), and a pad holder 4 is attached to the tip of the caliper arm 3. The pad holder 4 is formed with a dovetail groove 8 to be described later, and a pad assembly 5 is attached via the dovetail groove 8. An anchor block 6 coupled to the caliper arm 3 via the pad holder 4 and receiving braking torque is provided at both ends of the dovetail groove of the pad holder 4 in the direction in which the rotor slides on the brake pad during braking. It is assembled.

  In FIG. 2, the pad holder 4 has a dovetail groove 8 having a dovetail groove length A, and anchor blocks 6 are fixed to both ends of the pad holder 4 by fixing bolts 7. In FIG. 3, a step (concave portion) 9 is formed on the surface of the pad holder 4 that faces the anchor block 6, and the step that fits the step 9 on the surface of the anchor block 6 that faces the pad holder 4. (Protrusions) 10 are formed. These two steps 9, 10 have substantially the same height dimensions C, D, and are dimensioned so that no step is produced on the pad surfaces E, F when they are assembled. In the example shown in FIG. 3, the step is formed on both sides of the pad holder, but it may be formed over the entire width of the pad holder, and this width can be arbitrarily changed at the time of design.

On the other hand, the pad assembly 5 is provided with a locking member 11 that fits into the dovetail groove 8 (see FIG. 2B). The length of the locking member 11 substantially matches the length A of the dovetail groove 8 (see FIG. 2 (A)).
The pad assembly and the pad holder are attached to the pad holder 4 by fitting the locking member 11 on the pad assembly side into the dovetail groove 8 and then fixing the anchor block 6 with the fixing bolt 7. be able to.

At this time, when the pad holder 4 and the anchor block 6 are assembled, the step size formed in each is C≈D (see FIG. 3). Will not occur. Accordingly, when the brake is operated, the pressing force from the pad holder side acts on the pad surface directly or on the pad surface B protruding from the dovetail groove through the step of the pad holder and the step of the anchor block.
Thus, the pad portion B of the pad assembly protruding from the dovetail can be efficiently pressed.
The width and shape of the steps described above can be selected as appropriate as long as the function of the steps described above can be achieved.
As mentioned above, although the Example of this invention has been described, it can change suitably within the range of the meaning of this invention. The specifications described in the examples are merely examples in all respects and should not be interpreted in a limited manner.

  INDUSTRIAL APPLICABILITY The present invention can be used in the field of vehicles equipped with a brake, particularly a railway disc brake.

DESCRIPTION OF SYMBOLS 1 Support 2 Body 3 Caliper arm 4 Pad holder 5 Pad assembly 6 Anchor block 7 Fixing bolt 8 Dovetail groove 9, 10 Step 11 Locking member A Dovetail groove length B Pad part protruded from dovetail C, D Height of step Directional dimension E, F Pad surface

Claims (1)

By fitting the locking member attached to the pad assembly into the dovetail groove formed in the pad holder attached to the tip side of the caliper arm, the pad assembly is assembled to the pad holder and bolts etc. are attached to both ends of the dovetail groove on the pad holder side. In the railway disc brake in which the anchor block is fixed by the fixing means, a step is formed on the surface of the pad holder facing the anchor block, and further fitted on the step formed on the pad holder on the surface of the anchor block facing the pad holder. The step is formed, the both steps are fitted and assembled together, and when the both steps are assembled, the pad side surface of the anchor block and the pad side surface of the pad holder are substantially flush with each other. A pad surface pressure stabilization mechanism characterized by being formed as described above .

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