JPH11223232A - Friction pads for vehicle disc brakes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the binding strength of a lining by eliminating gas accumulation caused by the influence of the fiber component of the lining when the back board of a friction pad and the lining are bound together by using an intermediate member. SOLUTION: A metal wire 4 is formed by bending a wire into a sine curve shape. Three long and short metal wires 4 are assembled into an H shape. The summit of corrugate one side part of each metal wire 4 is brought into contact with one side surface 2a, and the metal wire 4 is erected on the one side surface 2a. Four parts of the end parts a-d of the metal wires 4, 4 or six parts including two parts of the joint points (e), (f) of the metal wire 4 are stuck to the one side surface 2a. A plurality of space parts 5 is arranged between the one side surface 2a and the corrugate shape of each metal wire 4 by crossing in the binding direction A of a lining 3. The lining 3 is bound on the one side surface 2a, and the metal wire 4 is embedded in the lining 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction pad used for disc brakes of various types of traveling vehicles such as four-wheeled vehicles and motorcycles, and more particularly, it relates to a bonding strength between a back plate of a friction pad and a lining. Related to the structure to be improved.

[0002]

2. Description of the Related Art A friction pad for a disk brake for a vehicle is disclosed in, for example, Japanese Patent Publication No. 5-71816. This technology uses a wire mesh punched from a metal plate as an intermediate material to increase the binding strength between the back plate and the lining, and lays the wire mesh flat on one side of the back plate to remove a plurality of portions of the wire mesh. Welded and attached to the back plate.

[0003] The above-mentioned back plate has a plurality of binding holes penetrating in the thickness direction, and a punch is inserted into these binding holes from the other side of the back plate so that the wire mesh welded to the back plate is backed. Partially float from one side of the board, apply or spray adhesive on one side of the back plate, lay the lining on the upper surface, press the lining against the back plate, bury the wire mesh inside the lining, At the same time that the lining is attached to one side of the back plate, the binding strength between the back plate and the lining is enhanced by an anchoring effect that ties the lining to the grid of the wire mesh.

[0004]

In such a construction, the mesh of the wire mesh is parallel to one side surface of the back plate and faces the direction of binding of the lining, so that the lining of the friction pad has a thickness of 2 mm or less. The fibrous component contained at a length of about 6 mm may be connected along one side surface of the back plate, and may straddle the grid of the wire mesh to leave a space in the grid.

For this reason, when the lining is pressure-bonded to the back plate as described above, a so-called gas reservoir in which air remains in the space and the lining cannot enter is generated, and the gap between the back plate and the lining is generated. , A portion that does not adhere to the lining remains to reduce the binding strength between the back plate and the lining.

Accordingly, the present invention provides a vehicle in which, when a back plate and a lining are bonded using an intermediate material, a gas pool due to the effect of the fibrous component of the lining is eliminated and the bonding strength can be sufficiently increased. The purpose of the present invention is to provide a friction pad for a disc brake.

[0007]

According to the above object, according to the first aspect of the present invention, there is provided a friction pad for a vehicle disk brake having a lining bonded to one side of a metal back plate. Then, a corrugated metal wire having continuous irregularities is attached to one side of the back plate with one side of the corrugation and bound in an orthogonal direction, and the metal wire is embedded inside the lining. According to a second aspect of the present invention, a binding hole for accommodating a part of the lining is formed on one side surface of the back plate according to the first aspect of the present invention.
The above-described metal wire is provided avoiding the binding hole.

As the waveform of the metal wire, there are a sine curve shape, a rectangular waveform, a V-shaped, a trapezoidal shape, a one-way tooth shape or the like in which arc-shaped irregularities are continuous, or an arbitrary irregularity is made continuous or these shapes are appropriately adjusted. They can be combined. The number of metal wires to be used is free depending on conditions such as the size of the friction pad and a desired binding strength.For example, one metal wire may be formed into a straight line, a circular shape, or a square shape on one side of the back plate. They may be arranged or two metal wires may be arranged so as to intersect in parallel or in an X shape.

According to the first or second aspect of the present invention, a gap is formed between the corrugated shape of the metal wire and one side surface of the back plate. Since this gap is provided with a small width within the thickness of the metal wire and intersected in the binding direction of the lining toward one side surface of the back plate, the fibrous component of the lining blocks the gap to generate a gas pool. Since the lining can enter the gap without any gaps, the binding strength of the lining is enhanced in combination with the anchoring effect in which the fibrous components of the lining are entangled with the metal wire.

[0010] According to the second aspect of the present invention, the metal wire is arranged so as to avoid the binding hole of the back plate, so that the connection length between one side surface of the back plate and the metal wire is ensured. Therefore, the binding strengths of the metal wire and the binding hole can be sufficiently exhibited.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the first embodiment of the present invention.
FIG. 1 is a sectional view taken along line II of FIG. 2, and FIG. 2 is a partial sectional front view of a friction pad. 3 to 5 respectively show second to fourth embodiments of the present invention. In these embodiments, the same components as those in the first embodiment are denoted by the same reference numerals and detailed description is given. Description is omitted.

In the first embodiment shown in FIGS. 1 and 2,
A friction pad 1 for a vehicle disk brake includes a back plate 2 and a lining 3 attached to one side surface 2a of the back plate 2. Inside the lining 3, one side surface 2 of the back plate 2 is provided.
A metal wire 4 bound to a is buried. The back plate 2 is formed by punching a highly rigid metal plate such as a steel plate into a predetermined shape with a press machine or the like. The back plate 2 penetrates through one side surface 2a and the other side surface 2b in the thickness direction. Circular binding holes 2c,
2c is drilled.

The lining 3 is composed of a plate-shaped main body 3a smaller than the back plate 2, and columnar binding projections 3c projecting from one side surface 3b of the main body 3a. The lining 3 is preformed in advance before bonding with the back plate 2 and is hot pressed with a forming die (not shown) of the main forming and bonded to the back plate 2, or the lining 3 is formed inside the forming die. The back plate 2 is put in, a powder lining base material and a binder are laid on the one side surface 2a facing upward, and bound to the back plate 2 while being molded by a hot press of a molding die. Also in this case, one side surface 3b of the main body 3a is bonded to one side surface 2a of the back plate 2, and the bonding projections 3c, 3c are fitted and bonded to the bonding holes 2c, 2c of the back plate 2.

As the metal wire 4, a wire having a circular cross section and appropriate rigidity is used. The wire is formed by bending the wire into a sine curve shape in which arc-shaped irregularities are linearly continued. In the friction pad 1 of the embodiment, three long and short metal wires 4 are used. Each of these three metal wires 4 stands upright on one side surface 2a with one side apex of the waveform applied to one side surface 2a, and two long metal wires 4, 4 have binding holes 2c, 2c.
Is disposed in the longitudinal direction of the back plate 2, and another short metal wire 4 passes between the binding holes 2 c, 2 c toward the width direction of the back plate 2, and has two ends at both ends. And joined to the middle point of the long metal wires 4 and 4 to form an H-shape. By this attachment, a substantially semicircular space portion 5 is formed between the one side surface 2a and the corrugated shape of each metal wire 4 so as to have a slight width W which is the thickness of the metal wire 4.
In this manner, a plurality of the linings 3 are formed so as to intersect with the binding direction A of the lining 3 toward the one side surface 2a.

On one side 2a of the back plate 2, a long metal wire 4,
The four ends a, b, c, and d of four, or six places including two of the joining points e and f of the three long and short metal wires 4 are joined by means such as welding or welding. One side 2 of the back plate 2
a and a plurality of semi-circular voids 5
Are formed in a direction intersecting with one side surface 2 a of the back plate 2. It is preferable that the three long and short metal wires 4 are assembled in an H shape in advance so that the work of bonding to the back plate 2 can be easily performed.

In this manner, three metal wires 4 are previously bonded to one side surface 2a of the back plate 2 so as to stand upright, and then the surface of the one side surface 2a and the inside of the bonding holes 2c, 2c are inserted. After the adhesive is applied or sprayed, the main body 3a of the lining 3 is bonded to the upper surface of the one side surface 2a, and the bonding projections 3c, 3c of the lining 3 are bonded in the bonding holes 2c, 2c, respectively. Inside, three metal wires 4 are embedded.

The lining 3 contains a fibrous component having a length of about 2 mm to 6 mm such as an organic fiber, an inorganic fiber, and a metal fiber.
The gaps 5 between the linings 3 have a slight width W, which is the thickness of the metal wire 4, and the binding direction A of the lining 3 toward the one side surface 2a.
When the lining 3 is bonded to one side 2a of the back plate 2, the air in the gap 5
As the lining 3 is bound to the “a”, the lining 3 is smoothly discharged, and the fibrous component does not close the gap 5, so that no gas remains in the gap 5. Therefore, since the lining 3 enters the gap 5 without a gap in place of the exhaust air, the contact area between the one side surface 2a of the back plate 2 and the lining 3 is increased, and the binding strength is increased.

The fibrous component in the lining 3 is directly bound to the one side surface 2a of the back plate 2 having an increased contact area, and is effectively entangled with the three metal wires 4 through the gap 5 to form a metal wire. 4 produces an anchoring effect that enhances the binding effect of the lining 3, so that the amount of the metal wire 4 used is smaller than that of a conventional wire mesh punched through a metal plate. Can be more enhanced.

Further, in this embodiment, three metal wires 4 are connected to the back plate 2.
By avoiding the binding holes 2c, 2c, the binding length between the one side surface 2a and the metal wire 4 does not need to be reduced by the binding holes 2c, 2c. Thus, the binding strength of the binding holes 2c, 2c can be sufficiently exhibited, and the lining 3 can be further firmly bound. Further, a sine-curve-shaped metal wire 4 as in the present embodiment is used.
Is commercially available as a ready-made wire rod, so it is only necessary to cut this wire rod into a required length and bind it to the back plate 2. As compared with the conventional one which requires the use of the metal wire 4, the amount of the metal wire 4 used is small, and the economical efficiency and the workability are extremely excellent.

In the second embodiment shown in FIG. 3, two metal wires 4, 4 are assembled in a substantially X-shape, and are connected to one side surface 2a of the back plate 2 while avoiding the connection holes 2c, 2c. An example is shown, and the metal wires 4 and 4 are bonded by welding, welding, or the like at four locations at the ends a to d or at five locations including an intermediate joining point g.

As the waveform shape of the metal wire 4, in addition to the sine curve shape shown in the first embodiment, a rectangular waveform having continuous square irregularities shown in the third embodiment of FIG. 4 or the fourth waveform shown in FIG. The one-way tooth shape shown in the embodiment may be used. In the third embodiment, each space 5 is formed in a rectangular shape, and in the fourth embodiment, each space 5 is formed in a triangular shape. Further, the metal wire 4 can have a V-shaped or trapezoidal waveform, or these waveforms can be appropriately combined. The metal wire 4
One side 2 of the back plate 2 bent into a circle, an ellipse or a polygon
a.

The metal wire is preferably bonded to the back plate avoiding the binding hole, so that the binding strength of each of the metal wire and the binding hole can be effectively exhibited. It does not necessarily prevent providing the metal wire on the binding hole. In addition, when the cross section of the metal wire is formed at least half of the back plate side surrounding the gap into a semicircle, semiellipse, triangle, etc.,
Although it is preferable to be able to efficiently discharge the air in the gap, the cross-sectional area of the metal wire itself is small, so that other cross-sectional shapes have little effect on the exhaust efficiency.

[0023]

As described above, according to the present invention, a corrugated metal wire having continuous irregularities is applied to the back plate of the friction pad, and one side of the corrugation is applied to one side surface of the back plate in the orthogonal direction. When the lining is attached to one side of the back plate, the thickness of the metal wire is slightly reduced between the one side of the back plate and the metal wire by burying the metal wire inside the lining. Is formed so as to intersect with the binding direction of the lining toward one side surface of the back plate, so that the fibrous components of the lining do not close the gap and generate a gas pool in the gap. The lining penetrates without gaps, so that the contact area between one side surface of the back plate and the lining can be increased, and the binding strength can be increased as compared with the related art.

Further, the fibrous component in the lining is directly bound to one side surface of the back plate having an increased contact area, and is effectively entangled with the metal wire through a gap to enhance the binding effect of the lining to the metal wire. Since the effect is obtained, the binding strength of the lining can be further increased, although the amount of the metal wire used can be reduced. In addition, since a plurality of types of corrugated wires used for the metal wire of the present invention are available as ready-made products, it is only necessary to cut this wire into a required length and bind it to the back plate, and the metal plate is punched. Compared to the conventional one that required the number of processing by, for example, partially raising the wire mesh, the amount of metal wire used was small,
Excellent in economy and workability.

Further, by arranging the above-described metal wire so as to avoid the binding hole of the back plate, the binding length between one side surface of the back plate and the metal wire is ensured. The binding strength of each of the holes can be sufficiently exhibited.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line II of FIG. 2 showing a first embodiment of the present invention;

FIG. 2 is a partial cross-sectional front view of a friction pad showing a first embodiment of the present invention.

FIG. 3 is a partial cross-sectional front view of a friction pad showing a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a friction pad showing a third embodiment of the present invention.

FIG. 5 is a sectional view of a principal part of a friction pad showing a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Friction pad 2 ... Back plate 2a ... One side of back plate 2 2b ... The other side of back plate 2 2c ... Binding hole 3 ... Lining 3a ... Body part of lining 3 3b ... One side of lining 3 3c ... Binding Projection 4: Metal wire 5: Void a to d: Ends of metal wire 4 e to g: Junction point between back plate 2 and metal wire 4 A: Bonding direction of lining 3 W: Width of void 5 (= metal) (Thickness of line 4)

Claims (2)

[Claims] 1. A friction pad for a disc brake for a vehicle, wherein a lining is bonded to one side surface of a metal back plate. Apply one side of the waveform to the side and bind in the orthogonal direction,
A friction pad for a disc brake for a vehicle, wherein the metal wire is embedded inside the lining. 2. A connection hole for accommodating a part of the lining is formed on one side surface of the back plate, and the metal wire is arranged avoiding the connection hole. 2. The friction pad for a vehicle disk brake according to claim 1.