JPH0454328A - Separation type brake shoe and brake head - Google Patents

Abstract

PURPOSE:To omit a base metal by engaging a reinforcement having a recess at the center with a brake head to slide freely facing it, and engaging a pin with the recess to protrude from the brake head by being presssed by a resilient member to stop a plurality of brake shoes. CONSTITUTION:Synthetic brake shoes A, B are each formed of a friction mate rial 2 fixed to one surface of a reinforcement plate 1, and a recess 3 formed at the center of the other surface. The reinforcement plate 1 is slid to be engaged with a groove 6 of a brake head 5, and it is pressed by a spring 7 to engage a pin 8 in the recess 3. The torque at the time of braking is received by the pin 8. In this structure, for abrasion or breakage of the friction material, the reinforcement plate and the friction material are only need be replaced, thereby the cost is reduced. In addition, use of a base metal is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a friction component of a tread brake for a railway vehicle, and a brake shoe and a brake shoe head that are attached thereto.

[Prior Art and Problems to be Solved by the Invention] It is known that such a brake shoe is one of the largest consumable parts in a general brake. In other words, the above-mentioned tread brakes originally originated from cast iron brake shoes, and even now, when synthetic brake shoes and sintered alloy brake shoes are common, the method of attaching brake shoes to the brake shoe head is still the same as the conventional method. It is in accordance with. Therefore, when the friction material is worn out or parts are damaged, a large portion must be replaced, that is, a large portion must be discarded, so improvements have been sought in terms of processing costs and material costs. Furthermore, in the past, the replacement work was difficult.

For example, in the structure of a conventional synthetic brake shoe, as shown in FIGS. A mounting plate (16) is provided. In addition, the structure of the sintered alloy brake shoe is
As shown in Figure 1 (a) and (b), the friction material (2) is fixed to the reinforcing plate fl) via the adhesive layer (4), the reinforcing plate (1) is fixed to the alloy (fl), and then Mounting plate (t6) same as above
It has been established. Note that (17) in both FIGS. 10 and 11 indicates a receiver. In such conventional synthetic brake shoes and sintered alloy brake shoes, all of the parts shown in the drawings are replaced as consumables and discarded, which poses a cost problem. Also, due to its structure, the base metal could sometimes be damaged.

[Means to solve the problem]

In view of this, as a result of various studies, the present invention has developed a brake shoe and a brake shoe that solves these problems.

That is, the present invention comprises a plurality of brake shoes each consisting of a reinforcing plate with a friction material fixed to one surface, the reinforcing plate facing the mounting surface of the brake shoe, and slidably engaged with the brake shoe. , and each brake shoe is immediately locked by inserting a pin that projects from the mounting surface of the brake shoe when pressed by an elastic body into the recess formed in the center of each of the reinforcing plates. It is characterized by the fact that

[For production]

In this way, in the present invention, the brake shoe that is attached immediately to the brake shoe is divided into a plurality of parts, and each reinforcing plate is attached by directly engaging the brake shoe head, which eliminates the need for conventional alloys and reduces the need for friction materials. The structure of the parts to be replaced or discarded due to wear and tear is simplified, which reduces processing costs and material costs, and also eliminates alloy damage caused by these.

〔Example〕

Next, one embodiment of the present invention will be described with reference to the drawings.

As shown in Fig. 1, a composite brake shoe (A) constituting the present invention
The friction material (2) is fixed to one side of the reinforcing plate (1),
A recess (3) is formed in the center of the other surface. In addition, a sintered alloy brake shoe (Ill) is made by fixing a friction material (2) to a reinforcing plate (1) via an adhesive layer (4) as shown in Fig. Concave part (3) in the center of the surface
was formed.

Furthermore, the brake shoe to which the brake shoe is assembled has the following structure. That is, as shown in Fig. 3, the brake shoe (5
), on the mounting surface of the reinforcing plate (1) to which the friction material (2) is fixed.
), a pair of opposing substantially U-shaped grooves (6) were provided in parallel for each brake shoe.

Further, when the reinforcing plate +1) is slid into the groove (6) to engage the brake shoe with the brake shoe (5), a spring ( When pressed by force, the pin (8) of the torque receiver protruding from the mounting surface of the brake shoe is inserted into the recess (3) of the reinforcing plate (1). This is to lock the wheel to the wheel and to receive the torque generated during braking.

According to such brake shoes and brake shoes, even if the friction material is worn out or damaged, the brake shoe, which has a simple structure consisting of only the reinforcing plate and the friction material, can be replaced, and the brake shoes are a consumable item. You get it for the cost.

Next, a method for replacing such brake shoes will be explained.

In this embodiment, as shown in FIG.
A roughly trapezoidal cross-section groove (9) into which the removal jig is inserted in the same direction as
) were installed. Furthermore, the torque receiver pressed by the spring (7) is connected to the pin (8) shown in FIG.
As can be seen from the line sectional view, a through hole (11) is bored at one end where the spring (7) is in contact, and when the torque receiver is installed with the pin (8), the through hole (1ω A jig insertion hole αυ is provided in the thickness direction of the brake shoe (5) which is an extension of the brake shoe. , its tip is a reinforcing plate (1
) is shown fitted into the recess (3).

To remove the brake shoe, use a pin extraction jig (+2) with a tapered tip as shown in FIG. Using a brake shoe removal jig 63) with protrusions in orthogonal directions, first remove the jig insertion hole α of the brake shoe (5) as shown in FIG.
Insert one end of the tapered side of the above extraction jig (roll) into υ. At this time, the tapered surface of the extraction jig (rolling)
The tapered surface causes the pin (8) to move against the pressing force of the spring (7), so that the tip of the pin (8) is inserted into the recess of the reinforcing plate (1). (3), the brake shoe becomes freely slidable in the direction of the pair of grooves (6) having a U-shaped cross section. Then, as shown in Figure 8, insert the parallel tips of the removal jig (13) into the two grooves (9) with a roughly trapezoidal cross section in the brake shoe head [5] corresponding to one brake shoe. do. The inserted jig (13) passes over the reinforcing plate (1,) and the protrusion 04) at the tip comes out from the slot on the opposite side, as shown in Figure 9 (a) and (b). , the protrusion 04) is engaged with the edge of the reinforcing plate (1), and the jig (13) is pulled out. By doing so, the reinforcing plate (1), that is, the brake shoe, can be easily removed.

〔Effect of the invention〕

As described above, according to the present invention, since the brake shoe has a simple structure as a split type, the processing cost of the friction material part as a consumable item is low, and the material cost is also reduced, so it is effective in terms of resource saving. Moreover, since no alloy is used, it has the effect of eliminating mechanical damage to the base metal and its parts as well as damage caused by processing thereof.

[Brief explanation of drawings]

FIG. 1 is a side view showing a synthetic brake shoe according to the present invention, FIG. 2 is a side view showing a sintered alloy brake shoe, FIG. 3 is a side view showing an embodiment of the present invention, and FIG. 4 is a side view showing a synthetic brake shoe according to the present invention. Fig. 3 is a sectional view taken along the line KX', Fig. 5 is a perspective view showing the pin removal jig used to remove the brake shoe, Fig. 6 is a perspective view showing the removal jig, and Fig. 7 is a perspective view showing the pin removal jig. Figure 8 is a sectional view of the main part showing how the tool is used, Figure 8 is a perspective view of the main part showing how the removal jig is inserted into the approximately trapezoidal groove, and Figure 9 (A) and (B) are both of the removal jig. Explanatory diagrams showing usage conditions, Figures 10 (a) (b) and 11
Figures (A) and (O) both show conventional brake shoes.
Both figures (A) and (B) are side views, and both figures (B) are rear views. DESCRIPTION OF SYMBOLS 1... Reinforcement plate, 2... Friction material, 3... Recessed part, 4...
... Adhesive layer, 5... Brake shoe, 6... Approximately U-shaped groove, 7.
・・・Spring, 8... Torque receiver is pin, 9... Approximately trapezoidal groove in cross section, 10... Through hole, 11... Jig insertion hole, I2
... Pin removal jig, 13... Brake shoe removal jig, 14
... protrusion, 15 ... base metal, 16 ... mounting plate,
17...Receive. Figure 1 Figure 4 Figure 2 Figure 5 Figure I2 Figure 7 Figure 8 Figure 9 (A) Figure 9 (B)

Claims (1)

[Claims] (1) A plurality of brake shoes made of reinforcing plates with friction material fixed to one surface are slidably engaged with the brake shoe head with the reinforcing plates facing the mounting surface of the brake shoe head, and Each brake shoe is locked to the brake shoe head by fitting a pin that projects from the mounting surface of the brake shoe head when pressed by an elastic body into a recess formed in the center of each of the reinforcing plates. A split type brake shoe and a brake shoe head characterized by the following.