JPS6110018Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a disc brake in which the pad is dragged and moved by the disc during braking, and the pad back metal collides with the pad pin, which not only damages the pad pin but also causes braking force to act on the pad pin. The present invention relates to a disc brake that prevents deformation due to

As is well known, a disc brake has two pads, an inner pad and an outer pad, which sandwich a rotating disc.During braking, both pads are moved relative to the cylinder body by the reaction force of the piston in the cylinder body. A yoke presses against the disc to generate braking force. Then, in order to support both pads in a reciprocating manner, a hole is formed in the backing metal of the pad, and a pad pin hung on the cylinder body or yoke is inserted and supported, and especially on the inner pad side, a hole is formed between the pad backing metal and the torque receiving member. A gap is provided, and this gap is made larger than a predetermined value to prevent unexpected situations such as mud from clogging in between or the pad becoming unable to slide due to rust. .

However, with the above structure alone, the gap between the pad pin and the hole and the gap between the back metal and the torque receiving member cause backlash between the pad back metal, the pad pin, and the torque receiving member, and during braking, The back metal may collide with the pad pin or torque receiving member, causing a tapping sound.

For this reason, conventionally, as shown in FIGS. 1 and 2, the cylinder body 1 has a built-in piston that presses the inner pad 4, and when braking, the piston presses the outer pad 5 by moving with respect to the cylinder body 1 due to reaction force. Projections 6a, 7a are provided at the center of the upper part of the back metals 6, 7 of the inner and outer pads 4, 5 arranged on both sides of the disk 3 between the disk 3 and the yoke 2.
, and both ends of the springs 8, 9 hung on the protrusions 6a, 7a are hung in the thickness direction of the disc, and holes 6b, 7 are bored in the pad back metals 6, 7.
A pair of pad pins 10, 11 are inserted through the holes 6b, 7b, and the pad backing metals 6, 7 are brought into elastic contact with the upper surfaces of the pad pins 10, 11 in the figure, in other words, in the radial direction of the disk. -ing With this configuration, the pad back plates 6 and 7 are urged downward by the elastic force of the springs 8 and 9,
The inner upper surfaces of the holes 6b, 6b, 7b, and 7b are elastically supported in a state in which they are in contact with the upper surfaces of the pad pins 10 and 11.

Therefore, the padded back metal 6 and padded pins 10 and 11
It is possible to prevent rattling noise between the two.

However, according to this configuration, the inner pad 4 is configured to come into contact with the torque receiving member 1a over almost the entire side surface of the back metal 6 as shown in FIG. 3, it hardly tilts with respect to the torque receiving member 1a. However, on the outer pad 5 side, as shown in FIG. 3, in order to prevent interference with the yoke 2, the torque receiving member 1a that comes into contact with the back metal 7 is limited to the upper part of the yoke 2, as shown in FIG. Pad 5 with braking like that
When the pad 5 is dragged by the disk 3 rotating in the direction of the arrow M in the figure, the pad 5 moves to the left in the figure and the back metal 7
contacts the torque receiving member 1a, but since the point A of the braking force acting on the pad 5 is closer to the center of rotation of the disc 3 than the torque receiving member 1a, the outer pad 5 receives a moment with point B as the fulcrum. . In this case, since the pins 10 and 11 are in contact with the inner upper surfaces of the holes 7b and 7b, the entire braking force acts on the pins 10 and 11 at the same time as braking, and as a result, the pins 10 and 11
are pushed downward in the figure from their normal positions 10', 11' indicated by dotted lines and deformed, which may impair normal braking function.

This idea was made in view of the above, and in a disc brake in which the pad back metal is inserted and supported by a pad pin and a predetermined gap is provided between the pad back metal and the torque receiving member, the pad back metal is inserted between the pad back metal and the pad pin. A spring is provided that is biased in the radial outward direction so that the lower surface of the pad pin in the figure contacts the inner and lower surfaces of the hole and forms a gap between the upper surface of the pad pin and the inner upper surface of the hole, that is, the inner surface on the radially outer side of the disk, Even if the pad is dragged diagonally downward by the disk during braking, the top surface of the pad pin does not collide with the inner top surface of the hole, thereby preventing deformation or damage to the pad pin and reducing hitting noise. The objective is to provide a disc brake that can also be used.

This invention will be explained below based on the drawings.

FIG. 5 is a plan view of an embodiment of this invention, and FIGS. 6 and 7 are front views of one pad. In these figures, the same parts as in FIGS. 1 to 4 are designated by the same reference numerals.

As shown, the inner and outer pads 4,
5, pad pins 10 and 11 are inserted into two through holes 6b, 6b, 7b, and 7b formed in pad back metals 6 and 7, respectively.
is inserted therethrough and supported between the cylinder body 1 and the yoke 2 so as to sandwich the disk 3 therebetween. Each of the holes 6b, 6b, 7b, 7b is formed as a horizontally long oval, and its short axis in the vertical direction is somewhat larger than the pad pins 10, 11 having a circular cross section. Then, through holes 6c, 7c are formed at the upper center of the padded back metals 6, 7, and central portions 8Aa, 9Aa of springs 8A, 9A, which are bent into approximately V-shapes, are inserted into the through holes 6c, 7c. At the same time, both ends 8Ab, 8Ab, 9Ab, 9Ab are inserted into radial holes 10a, 10a, 11a, 11a formed in the pad pins 10, 11. Since the springs 8A and 9A have elastic force in the direction in which both ends approach each other, when they are hung in this way, the center portions of the springs 8A and 9A are directed upward, that is, the pad backings 6 and 7 are directed outward in the radial direction of the disk. As a result, the hole 7b and the pad pin 10, as shown in FIG.
A gap e ₁ is formed between the upper side and the upper side of 11.
Furthermore, by forming the spring 9A in a symmetrical shape, the back metal 7 of the outer pad is located approximately at the center of the left and right torque receiving members 1a, and therefore a gap e ₂ is formed on the left and right sides of the pad back metal 7, respectively. Become.

According to the above configuration, when the brake is not applied, the pad back plates 6 and 7 are attached to the torque receiving member 1 as shown in FIG.
Since gaps e ₂ and e ₂ are formed on the left and right sides at the center between a and 1a, the pads are prevented from being clogged with mud and unable to slide.

During braking, when the back plate 7 of the outer pad is dragged by the disk 3 rotating in the direction of arrow M in the figure as shown in Fig. 7, the pad back plate 7 moves toward the torque receiving member 1a on the side in the rotation direction of the disk. and contact this. At this time, the pad 5 receives a moment with point B as the fulcrum, as in FIG. Due to this moment, the left side of the pad back metal 7 hits the torque receiving member 1a, but even if the pad is displaced until this hits, the structure is such that there is a gap between the pad pins 10, 11 and the inner surface of the hole 7b. , it does not reach the pin. Therefore, it is possible to prevent the entire braking force from acting on the pad pin via the pad back metal, and it is possible to prevent the pad pin from being deformed or damaged.

Needless to say, even when the disk is reversed (when moving backward), the pad backing plate reverses and collides with the torque receiving portion on the opposite side first, thereby preventing deformation and damage of the pad pin.

As explained above, according to this invention, pad back metals fixed to a pair of pads arranged on both sides of a rotating disk are inserted into holes formed in the pad back metal using pad pins hung from the cylinder body or yoke. A disc is inserted through and supported, and a predetermined gap is provided between the pad back metal and the torque receiving member, and a spring is hung between the pad back metal and the pad pin to bias the pad back metal in the disk radial direction. In the brake, the biasing force of the spring on the pad back metal is applied in the disc radial direction, and the hole is provided between the pad pin and the inner surface of the hole on the outside in the disc radial direction comes into contact with the pad pin when not braking. Since the structure is configured to form a gap that prevents the pad backing metal from colliding with the pad pin even if it comes into contact with the torque receiving member during braking, it prevents the pad backing metal from colliding with the pad pin during braking and prevents deformation and damage of the pad pin. This has a great practical effect in that it can prevent this and also reduce the hitting sound.

[Brief explanation of the drawing]

Figures 1 to 4 show a conventional disc brake. Figure 1 is a plan view, Figure 2 is a diagram showing how the inner pad is attached, Figure 3 is a diagram showing how the outer pad is attached, and Figure 4 is a diagram showing how the outer pad is attached. Figure 5 is a plan view of the disc brake of this invention, Figure 6 is a diagram showing the state of the pads of the disc brake of this invention when braking is not applied, and Figure 7 is a diagram showing the state of the pads during braking. FIG. 3 is a diagram showing the state of the pads of the disc brake of the present invention at the time of the present invention. 1...Cylinder body, 2...Yoke, 3...
Disc, 4, 5...Padded, 6,7...Padded back metal, 6b, 7b...Hole, 8, 8A, 9, 9A...
...Spring, 10, 11...Putted pin.

Claims (1)

[Scope of utility model registration request] Pad back metals fixed to a pair of pads placed on both sides of the rotating disk are supported by inserting them into holes formed in the pad back metal using pad pins hung on the cylinder body or yoke, and while these pad back metals and torque In a disc brake in which a predetermined gap is provided between the pad backing plate and the receiving member, and a spring is hung between the pad backing plate and the pad pin to bias the pad backing plate in the disk radial direction, the spring is attached to the pad backing plate. A biasing force is applied in a radially outward direction of the disc, and the hole is arranged between the pad pin and the disc radially outward inner surface of the hole so that it does not come into contact with the pad pin when braking is not applied and when braking the pad pin. A disc brake characterized in that a gap is formed to prevent the backing metal from colliding with the pad pin even if it comes into contact with the torque receiving member.