JP2522003Y2 - Sintered alloy brake shoe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sintered alloy brake shoe used for a road surface brake or the like for a railway vehicle, and in particular, simultaneously realizes noise reduction and cost reduction.

[Problems to be solved by conventional technology and device]

In a conventional sintered alloy brake shoe, for example, as shown in FIG. 2, a reinforcing plate (7) such as a copper-plated steel plate is bonded to a base-side surface on which a friction material block (2) made of a sintered alloy is mounted. Agent (8)
The reinforcing plate (7) is fixed to the brake shoe base (4) by fillet welding.

However, when welding and fixing are performed in this manner, it is difficult to ensure the accuracy of the curvature of the back surface of the base metal due to heat during welding. Further, there is a problem in such a sintered brake shoe as to noise suppression due to stick-slip between the friction material and the wheel tread during braking and repeated hammering.

[Means for solving the problem]

As a result of various studies to solve such problems, the present invention has developed a brake shoe that is effective for noise reduction and is easy to handle, and has a friction material block made of a sintered alloy attached to a base. In the brake shoe, an elastic layer is interposed between the friction material block and the base metal, and the protruding portion of the base of the friction material block on the base side protruding outward is riveted at one end to the base metal. Characterized in that it is locked by a presser plate.

[Action]

As described above, in the present invention, since the friction material block is not welded when attached to the base metal, there is no deformation due to heat of the member at all,
Products with good shape accuracy can be obtained.

The manufacturing process of the sintered alloy brake shoe of the present invention is as follows, for example. First, in order to obtain a friction material block, an alloy powder as a raw material is sintered under no pressure, and then sized to have a shape having a protruding portion whose peripheral edge on the base side is outwardly protruded. Next, the friction material block on the base side is brought into close contact with the base metal through a shim material having an effect of attenuating noise. Then, a holding plate is engaged with the protruding portion, and the other end of the holding plate is riveted to the base metal to complete the assembly.

Therefore, compared to the conventional production process of the brake shoe shown in FIG. 2,
It has the following advantages. That is, since the present invention has no adhesive layer, the pressing step and the adhesive sintering step of the adhesive layer can be eliminated. Also, the step of mixing and stirring the adhesive is not required. In addition, the material cost of the reinforcing plate and the adhesive itself can be saved.

As described above, the present invention has achieved a significant cost reduction by reducing man-hours and parts. Further, since an elastic body is interposed between the base metal and the friction material block, it is effective for noise reduction.

〔Example〕

 Next, an embodiment of the present invention will be described.

As shown in FIG. 1, a raw material alloy powder of a sintered alloy friction material was sintered without pressure, and then sized to form a friction material block (2) having a protrusion (1) having a substantially triangular cross section on the base side peripheral edge. )
Was made. Next, the base side of the block (2) is brought into close contact with the base metal (4) under pressure via the shim material (3), and the pressing plate (5) having a shape conforming to the shape of the projection (1) is formed. The protrusion (1) is held at the other end, and one end is fixed to the base (4) with a rivet (6), so that the friction material block (2) is locked to the base (4). Thus, the sintered alloy brake shoe of the present invention was made.

As described above, since the brake shoe can be integrated without welding, the dimensional accuracy of the base metal is good, and the shim interposed as a noise countermeasure is not affected by the heat due to welding, so that it can work effectively.

[Effect of the invention]

As described above, according to the present invention, the friction block and the elastic body are simultaneously pressed against the base metal and riveted to each other with the presser plate, so that the bonding and sintering can be eliminated, thereby reducing the number of man-hours and parts during production, thereby reducing costs. As a result, it is possible to reduce the noise, to prevent the occurrence of welding distortion when the friction material block is attached, and to reduce noise by using an elastic body.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention, and FIG. 2 is a side view showing a conventional example. 1 ... projecting part, 2 ... friction material block, 3 ... shim material,
4 ... Base metal, 5 ... Presser plate, 6 ... Rivets, 7 ... Reinforcement plate, 8 ... Adhesive.

Claims (1)

(57) [Scope of request for utility model registration] 1. A brake shoe in which a friction material block made of a sintered alloy is attached to an alloy, an elastic layer is interposed between the friction material block and the base metal, and a base of the friction material block on the base metal side. A sintered alloy brake shoe, characterized in that a protruding portion of which a peripheral edge is extended outward is locked by a pressing plate having one end riveted to a base metal.