JP5369129B2 - Rail brake pad misassembly prevention structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembly error prevention structure for a brake pad in a caliper brake for a railroad vehicle. <P>SOLUTION: In this assembly error prevention structure for a railroad brake pad, an assembly error prevention body is attached to an anchor block 2a to be attached to an arm 1a at a cylinder side of a caliper body, out of a pair of arms 1a, 1b constituting the caliper body. A corner part of a portion facing the assembly error prevention body is formed by chamfering in the brake pad 5 to be attached to the arm at the cylinder side. A hole for attaching the assembly error prevention body is formed in the anchor block 2a to be attached to an arm 1b at a non-cylinder side of the caliper body. The assembly error prevention body is attached to the hole. A corner part of a portion facing the assembly error prevention body is formed by chamfering in the brake pad 5 to be attached to the arm at the non-cylinder side. The brake pad 5 is attached to the corresponding cylinder side arm or the non-cylinder side arm. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a structure for preventing erroneous assembly of a brake pad in a caliper brake for a railway vehicle, and more specifically, when a brake pad is assembled to a caliper brake, if a brake pad of a different material is assembled, the anchor block side The present invention relates to a brake pad misassembly prevention structure that interferes with an erroneous assembly prevention body such as an attached pin so that the brake pad cannot be assembled. This prevention structure is a structure that can easily prevent erroneous assembly of the brake pad by performing a slight processing on the anchor block and brake pad of a known railcar caliper brake.

For example, JP-A-11-222129, JP-A-9-89017, and JP-A-2008-8442 are prior art documents relating to a structure for preventing erroneous assembly of brake pads for railways.
Of these, the erroneous assembly prevention structure described in JP-A-11-222129 will be described with reference to FIGS. 12 and 13. FIG. 12 shows a guide provided on the cylinder side of the arm of the caliper body in the caliper brake for a railway vehicle. FIG. 5 is an explanatory view showing details of a rail member 300. The guide rail member 300 has a folded portion 330 formed on one side of a long main body 310, and a groove portion 332 is provided by the folded portion 330. A hole 316 that engages with the upper anchor pin of the caliper brake is provided in the upper part of the guide rail body 310, and a recess 314 that engages with the lower anchor pin is provided in the lower part. Further, at the upper end of the guide rail main body 310, there is provided a misassembly prevention device 320 for a brake wheel (brake pad) formed by bending a part of the main body 310 by 90 degrees.
FIG. 13 shows a state where the control member 200 is obliquely assembled to the guide rail member 300. In this state, the base member 230 of the control device 200 interferes with the erroneous assembly preventing device 320 provided at the upper end of the main body 310 of the guide rail member. Therefore, a phase shift occurs between the groove 314 of the guide rail main body 310 and the groove 250 of the base member 230 of the restrictor 200, and the lower anchor pin cannot be inserted. In this way, incorrect assembly of the control is prevented.
However, the above-described misassembly prevention structure requires the formation of a mis-attachment prevention device 320 for the control device formed by bending a part of the main body 310 by 90 degrees at the upper end of the guide rail main body 310. There are problems such as high costs. In addition, the other prior art documents also have a problem that processing for newly forming a notch or the like is required in the same manner as this example, resulting in high processing costs.

JP-A-11-222129 JP-A-9-89017 JP 2008-8442 A

  Therefore, the present invention uses a hole already formed in the anchor block in a known caliper brake for a railway vehicle, or additionally processes a hole in the anchor block, and prevents erroneous assembly of pins, plates, etc. in the hole. An object of the present invention is to provide an assembly preventing structure that can easily prevent erroneous pad assembly by simply attaching a body.

Therefore, the problem solving means adopted by the present invention is:
In a caliper brake for a railway vehicle, a misassembly prevention body is attached to an anchor block attached to a pair of arms constituting the caliper body of the brake, and a brake pad attached to each of the arms has a symmetrical shape with respect to the center in the longitudinal direction And the corners of the portions facing the misassembly prevention body at both ends of the brake pad are configured as chamfered portions, and the brake pad is assembled incorrectly by attaching the brake pad to a corresponding arm. A structure for preventing erroneous assembly of a brake pad for a railway, characterized by preventing attachment .
Further, in the above-described structure for preventing erroneous assembly of a brake pad for a railroad, a misassembly preventing body is formed on an anchor block attached to an arm on a cylinder side of the caliper body, out of a pair of arms constituting the caliper body. In addition, the anchor block attached to the non-cylinder side arm of the caliper body is formed with a mis-assembly preventing body, and the cylinder side arm and the brake pad attached to the non-cylinder side arm are symmetrical with respect to the longitudinal center. Chamfered portions are formed at the corners on both ends of the pad that are formed in a shape and face the misassembly prevention body formed on the anchor block on the cylinder side and the non-cylinder side of the brake pad, A brake pad formed in this way is attached to the corresponding cylinder side arm or non-cylinder side arm Is a mis-mounting prevention structure of a railway brake pad, characterized in that the erroneous installation can be prevented by the.
Further, the erroneous assembly preventing body is a structure for preventing erroneous assembly of a railway brake pad, wherein the erroneous assembly preventing body is constituted by a plate or a pin.
Further, the caliper body of the cylinder-side arm mounting preventive mis-mounting attachment to the anchor block of the railway, characterized in that mounting also serves as a hole for the anchor spring mounting provided beforehand on the anchor block Brake pad misassembly prevention structure.

According to the present invention,
By using the holes already formed in the anchor block, or by simply drilling the anchor block, it is possible to easily attach a misassembly prevention body formed of plates, pins, etc. Incorrect assembly can be prevented. The plate that is attached to the anchor block of the cylinder side arm to prevent incorrect assembly uses a hole that is already open in the anchor block (ie, a hole for attaching an anchor spring to prevent the anchor block from falling off). Because it is attached, no new drilling is required.
Further, the plate is mounted in a direction in which it is hard to bend even when different brake pads are assembled vigorously because the plate is abutted against the stepped processed portion of the anchor block. In addition, the plate is stepped to increase rigidity. Also, it is important that the height h of the plate matches the height H of the pressure plate of the brake pad. If the protruding height h of the plate exceeds the height H of the brake pad, the gap with the disc rotor is reduced. Care must be taken because there is a risk of interference.
In this example, the non-cylinder side arm needs to be machined with a hole for attaching a misassembly prevention pin to the anchor block. Unlike bending, however, it is a simple drilling process, so machining is easy. It is. Further, instead of the pins provided on the non-cylinder side, the plate described above can be assembled also on the non-cylinder side.
This misassembly prevention mechanism can prevent the pad from being reversely assembled by 180 degrees.

(A) is a front view of a caliper main body of a caliper brake for a railway, and (b) is a three-side view of the caliper main body. It is a perspective view of the brake pad attachment part which looked at the non-cylinder side from the cylinder side of the caliper main body, and is an example using a pin as a misassembly prevention body. FIG. 3 is a detailed view of a main part in FIG. 2. It is a perspective view of the brake pad attachment part which looked at the non-cylinder side from the cylinder side of the caliper main body, and is an example in which the brake pad misassembled interferes with the pin. FIG. 5 is a detailed view of a main part in FIG. 4. It is a perspective view of the brake pad incorrect assembly state which looked at the cylinder side from the non-cylinder side of the caliper body, and is an example using a plate as a misassembly prevention body. It is a principal part detail drawing in FIG. It is a perspective view of the brake pad incorrect assembly state which looked at the cylinder side from the non-cylinder side of the caliper body, and is an example in which the brake pad misassembled interferes with the plate. It is a principal part detail drawing in FIG. It is a front view of the brake pad for incorrect assembly prevention. It is a front view of the brake pad of conventional structure. It is the front view and side view of a conventionally well-known guide rail member for incorrect assembly prevention. It is explanatory drawing of the state which attached the pad to the guide rail member of FIG. 12 incorrectly.

  The present invention relates to a caliper brake for a railway vehicle, wherein an erroneous assembly preventing body is attached to an anchor block attached to a pair of arms constituting the caliper body of the brake, and the erroneous assembly preventing body is attached to a brake pad attached to each of the arms. It is possible to prevent erroneous assembly of the brake pads by chamfering the corners of the portions facing the two and attaching the brake pads to the corresponding arms.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a rail brake pad misassembly prevention structure according to the present invention will be described below with reference to the drawings.
1A is a front view of a caliper body 1 of a caliper brake for a railway, FIG. 1B is a three-side view of the caliper body 1, and FIG. 3 is an example in which a pin is used as a misassembly prevention body, FIG. 3 is a detailed view of a main part in FIG. 2, and FIG. 4 is a view of a brake pad mounting part as viewed from the cylinder side of the caliper body to the non-cylinder side. FIG. 5 is a perspective view of an example in which a mis-assembled brake pad interferes with a pin, FIG. 5 is a detailed view of a main part in FIG. 4, and FIG. 6 is a brake pad mounting part as viewed from the non-cylinder side of the caliper body. FIG. 7 is a detailed view of the main part in FIG. 6, and FIG. 8 is a perspective view of the brake pad in the assembled state when the cylinder side is viewed from the non-cylinder side of the caliper body. Interference with plate FIG. 9 is a detailed view of the main part in FIG. 8, FIG. 10 is a front view of a brake pad for preventing misassembly, FIG. 11 is a front view of a brake pad having a conventional structure, and FIG. FIG. 13 is an explanatory view showing a state in which a brake pad is erroneously assembled to the guide rail member of FIG. 12.

  In FIG. 1, a rail caliper brake has a caliper body 1 that sandwiches wheels, and the body is supported in a floating state so as to be slidable on a support pin 10 with respect to a support frame 11 via a support pin 10. Yes. The caliper body 1 includes a pair of arms 1a and 1b that sandwich a wheel, and of these, the first arm 1a is equipped with two hydraulic cylinders 14 as shown in FIG.

  As shown in FIG. 1B, an upper anchor block 2a is disposed at the upper end of the first arm 1a. The upper anchor block 2a receives the upper end portion of the brake pad 5 via the upper anchor pin 7a. The upper anchor block 2a is fixed to the first arm 1a by anchor bolts 8.

  A lower anchor block 2b is disposed at the lower end of the first arm 1a, and the lower anchor block 2b receives a lower end portion of the brake pad 5 via a lower anchor pin 7b. The lower anchor block 2b is fixed to the first arm 1a via an anchor bolt 8, and an anchor spring 9 is attached to the lower anchor block 2b.

  The second arm 1b disposed opposite to the first arm 1a is equipped with a hydraulic cylinder for pressing the brake pad 5 like the first arm 1a, and an upper anchor block 2a is provided at the upper end thereof. Arranged, the upper anchor block 2 a receives the upper end of the brake pad 5. The upper anchor block 2a is fixed to the second arm 1b by anchor bolts 8.

  A lower anchor block 2b is disposed at the lower end of the second arm 1b. The lower anchor block 2b receives the lower end of the brake pad 5, and the lower anchor block 2b is fixed to the second arm 1b via an anchor bolt 8. The An anchor spring 9 is attached to the lower anchor block 2b.

As described above, the second arm 1b is not equipped with the hydraulic cylinder 14 for pressing the brake pad 5 like the first arm 1a. Therefore, when the hydraulic cylinder 14 provided on the first arm 1a is operated, the brake pad 5 attached to the first arm abuts against the brake disk, and the caliper body 1 moves along the support pin 10 by the reaction force at that time. To do. As a result, the brake pad 5 attached to the second arm 1b comes into contact with the disc brake, and thus the brake disc is sandwiched between the two brake pads 5 and 5 attached to the first and second arms to operate the brake. it can.
The above-described configuration is the same as that of a conventionally known caliper brake, and is not a feature of the present invention, so that further detailed description is omitted.

Subsequently, an erroneous assembly prevention structure for the brake pad 5 which is a feature of the present invention will be described. First, an erroneous assembly prevention structure to be attached to the second arm 1b of the caliper body 1 will be described.
In FIG. 2, a brake pad 5 is attached to the second arm 1b (non-cylinder side) of the caliper body 1 by a known dovetail mechanism (not shown), and as described above, the upper end of the second arm 1b is attached to the upper end of the second arm 1b. The upper anchor block 2a is fixed by an anchor bolt 8, and the upper anchor block 2a is structured to receive the upper end portion of the brake pad 5. A hole is newly machined in the upper anchor block 2a at a position facing the corner of the brake pad 5, and a pin 3 is attached to this hole. Further, the brake pad 5 facing the pin 3 is formed with a chamfered corner 6 so that the back metal 5a does not interfere with the pin 3 when the brake pad 5 is mounted (see FIGS. 3 and 10). ). By using the pin 3 attached to the upper anchor block 2a and the chamfered brake pad 5 in this way, erroneous assembly of the brake pad 5 can be prevented.
If another brake pad 5 that is not chamfered 6 is attached to the second arm 1b, the corners of the back metal 5a of the brake pad 5 interfere with the pin 3 as shown in FIGS. The brake pad 5 cannot be attached at an accurate position. Thus, erroneous assembly of the brake pad 5 can be prevented.

Next, a misassembly prevention structure attached to the first arm 1a of the caliper body 1 will be described.
In FIG. 6, the brake pad 5 is attached to the first arm 1a of the caliper body 1 by a known dovetail mechanism, and the upper anchor block 2a is disposed at the upper end of the first arm 1a as described above. The upper anchor block 2a is structured to receive the upper end portion of the brake pad 5 via an anchor pin.
As shown in FIG. 6, the lower anchor block 2b that receives the brake pad 5 is formed with a hole for attaching an anchor spring 9 for preventing the anchor block 2b from falling off the caliper body 1. The anchor block 2a is prevented from falling off from the caliper body 1 when the brake pad 5 is replaced by the attached anchor spring 9.

  As described above, the upper and lower anchor blocks 2a and 2b are attached to the upper and lower ends of the first arm 1a. The anchor spring 9 is attached to the lower anchor block 2b as shown in FIG. On the other hand, no anchor spring is attached to the anchor block 2a at the upper end. For this reason, in the anchor block 2a on the upper end side, the anchor spring mounting hole remains open. In the present invention, the plate 4 serving as a misassembly prevention body is attached using the hole that remains open. The plate 4 is bent to increase rigidity (see FIG. 7), and is fixed to the end of the upper anchor block 2a by a fixing member (in this example, a pin) 13. In addition, the plate 4 is formed in a shape that abuts on the step portion 12 formed on the upper anchor block 2a. In the state where the plate is mounted, the plate 12 is acted on by the action of the step portion 12 even if a force from below is applied. 4 does not rotate upward. For this reason, even when the brake pad 5 is assembled vigorously, the plate 4 is in a direction in which it is difficult to bend. Further, it is important that the protruding height h of the plate 4 is matched with the height H of the brake pad 5. When the height h of the plate 4 is equal to or higher than the height H of the brake pad 5, the gap with the disc rotor is small. Care must be taken because there is a risk of interference.

  Further, the brake pad 5 attached to the first arm 1 a side is also formed by chamfering the corners of the back metal 5 a so as not to interfere with the plate 4. Therefore, by attaching the plate 4 as the misassembly prevention body 4 to the upper anchor block 2a by the fixing member (pin in this example) as described above, and further using the brake pad 5 having the chamfered 6, As shown in FIG. 7, the brake pad 5 can be assembled in a proper state, and erroneous assembly of the brake pad 5 can be prevented.

  If the brake pad 5 as a separate member not chamfered 6 is attached to the first arm 1a, the corners of the back metal 5a of the brake pad 5 interfere with each other as shown in FIGS. The brake pad 5 cannot be attached at an accurate position. As a result, erroneous assembly of the brake pad 5 can be prevented.

  As described above, according to the present invention, it is possible to prevent erroneous assembly formed by the plate 4 or the pin 3 by using a hole already formed in the anchor block or by performing a simple drilling process on the anchor block. The body can be easily attached, and erroneous assembly of the brake pad 5 can be easily prevented.

In this example, the configuration is described in which the plate 4 is attached to the cylinder side (first arm 1a) and the pin 3 is attached to the non-cylinder side (second arm 1b). By attaching the plate 4 to the non-cylinder side, it is possible to prevent erroneous assembly.
Moreover, the shape of a pin or a plate, an attachment position, etc. can be suitably selected as needed. Further, as the fixing member, for example, a screw can be used in addition to the pin.
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.

  The present invention can be used in the field of vehicles equipped with a brake.

DESCRIPTION OF SYMBOLS 1 Caliper main body 1a 1st arm 1b 2nd arm 2a Upper anchor block 2b Lower anchor block 3 Pin 4 Plate 4a Bending process 5 Brake pad 5a Back metal 6 Chamfer 7a Upper anchor pin 7b Lower anchor pin 8 Anchor bolt 9 Anchor spring 10 Support pin 11 Support frame 12 Step 13 Fixing member (pin or screw)
14 Hydraulic cylinder

Claims (4)

In caliper brakes for railway vehicles,
Attach a misassembly prevention body to the anchor block attached to the pair of arms constituting the caliper main body of the brake
The brake pads attached to each of the arms are configured to have a symmetrical shape with respect to the center in the longitudinal direction, and the corners of the portions facing the erroneous assembly preventing body at both ends of the brake pads are chamfered portions. Configured,
A structure for preventing erroneous assembly of a brake pad for a railway, wherein the brake pad is attached to a corresponding arm to prevent erroneous assembly of the brake pad. In the structure for preventing erroneous assembly of a railway brake pad according to claim 1,
Of the pair of arms constituting the caliper body, an anchor assembly is formed on the anchor block attached to the cylinder side arm of the caliper body.
In addition, the anchor block attached to the non-cylinder side arm of the caliper body is formed with a misassembly prevention body,
The brake pads attached to the cylinder side arm and the non-cylinder side arm are formed symmetrically with respect to the center in the longitudinal direction, and the error is formed in the anchor block on the cylinder side and the non-cylinder side of the brake pad. A chamfered portion is formed at the corners on both ends of the pad facing the assembly preventing body,
A structure for preventing erroneous assembly of a railroad brake pad, wherein the brake pad formed as described above can be attached to a corresponding cylinder side arm or non-cylinder side arm to prevent erroneous assembly. The structure for preventing erroneous assembly of a railway brake pad according to claim 1 or 2 , wherein the erroneous assembly preventing body is constituted by a plate or a pin. The caliper body of the cylinder-side arm to the mounting preventive mis-mounting attachment to the anchor block is to claim 3, wherein the mounting also serves as a hole for the anchor spring mounting provided beforehand on the anchor block The structure for preventing incorrect assembly of the described brake pads for railways.

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