JPS6326581Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in disc brakes, particularly collector-type disc brakes.

The structure of a conventional collet-type disc brake will be explained with reference to FIGS. 1 to 4. Reference numeral 1 denotes a torque receiving member with a U-shaped side surface that is fixed to the vehicle body side (not shown), and the torque receiving member 1 is integrated with the wheel. A notch 2 that receives the circumferential side of the brake disc 18 that rotates, and slide pins 16 of the caliper 12, which will be described later, on both sides.
mounting support parts 3, 3 formed with guide holes 4, 4 through which the pads 16 are inserted;
Reference numeral 11 is provided with torque receiving parts 5, 5 to be hung.
Reference numeral 12 designates a bridge-shaped caliper having a built-in cylinder device 13 on one side and a pad holding arm portion 15 on the other side. The slide pins 16, 16 are inserted into the guide holes 4, 4 of the mounting support parts 3, 3, and are slidably assembled to the torque receiving member 1.

During braking, the disc brake configured as described above operates the cylinder device 13 of the caliper 12 to advance the piston 14, and the inner pad 6
is pressed against the brake disc 18, while the caliper 12 slides to the right in FIG.
Thus, both pads 6 and 7 clamp the brake disc 18 to perform braking.

By the way, in the case of such a collect type disc brake, a pad presser spring is usually installed in order to suppress the above-mentioned floating of the pads 6 and 7, but generally, as shown in the figure, a pad presser spring is installed as the pad presser spring. leaf spring 19
is frequently used. This leaf spring 19 for holding down the pads extends over the lower surface 3a of the mounting support portion 3 of the torque receiving member 1, the lower surface 12a of the caliper 12, and the upper surface of the back metal shoulder portions 10, 11 of the inner and outer pads 6, 7. The shoulder portion 10,
Shoulder portions 10 and 1 are separated by protrusions 20 that abut against the upper surface of 11.
1 by applying a spring reaction force to the shoulders 10, 1.
1 is pressed against the torque receiving portion 5 to suppress free movement.

However, like this, the padded presser spring 1
9 is loaded across the lower surface 12a of the caliper 12, the caliper 12 becomes a so-called floating type assembly in which the slide pin 16 is inserted into the guide holes 4 of the mounting supports 3, 3 as described above. Because of this, the caliper 12 tends to float due to the reaction force of the pad presser spring 19, and this floating of the caliper 12 causes the pads 6 and 7 to tilt, causing the pads 6 and 7 to partially tilt even when braking is not applied. Since the brake disc 18 is strained and the sliding resistance increases between the slide pin 16 and the guide hole 4, the caliper 12 does not return smoothly even if the pressing force of the cylinder device 13 is released after braking, and the pad 6 and 7 slide on the brake disc 18, the dragging torque during non-braking increases. Furthermore, due to the floating of the caliper 12, the pads 6 and 7 and the slide pin 1
There was a problem in that uneven wear of No. 6 occurred, resulting in reduced braking effectiveness and rattling.

In view of this conventional situation, the present invention has been developed by separating the pad presser spring from the lower surface of the caliper and elastically loading it across the lower surface of the mounting support of the torque receiving member and the upper surface of the pad shoulder, so that the spring rebounds downwardly against the pad shoulder. By applying a force to suppress the free movement of the pad, it is possible to avoid floating of the caliper, prevent generation of drag torque when not braking, and prevent uneven wear of the pad and slide pin. In particular, the pad presser spring is formed of a linear steel material, and the pad presser spring has a pair of linear base parts that abut against the lower surface of the mounting support part, and bent base parts bent outward on both sides from these base parts, respectively. an arm portion which is once bent downward and connected to the bent base portion and is bent and formed into a planar substantially U-shape to press the upper surface of the shoulder portion on each side of the pair of padded backing metals; and the base portions of these arm portions. The intermediate portion on the opposite side is formed to stand up and connect to the bent base that is once bent upward to connect the arm portion, and comes into contact with the side surface of the mounting support portion and cooperates with the base portion to form the arm portion. and a support section that applies a spring reaction force that presses the pad downward.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, in which the same parts as those of the conventional structure are denoted by the same reference numerals.

That is, in the present invention, as illustrated in FIGS. 5 and 6, during braking, the piston 14 advances into the cylinder device 13 of the caliper 12 to press the inner pad 6 against the brake disc 18, and the reaction force pushes the caliper. 12 is slid relative to the torque receiving member 1, and the arm portion 15 presses the outer pad 7 against the other side of the brake disc 18 for braking. The lower surfaces 3a and 3b of the mounting support part 3 of the member 1, and the inner and outer pads 6,
Pad presser spring 2 across each upper side of 7.
1 is loaded, and a spring reaction force is applied to the upper surfaces of the outer pads 6 and 7, so that the pad shoulders 10,
11 is pressed against the torque receiving portion 5 to suppress its free movement.

The pad presser spring 21 is made of a linear steel material as shown in FIG. Each of the inner and outer pads 6 and 7 is bent downward from the bent base which is bent outward on both sides, and is connected to the bent base and bent into a substantially U-shape in plan, and has a backing shoulder on each side of the inner and outer pads 6 and 7. Arm parts 23, 23 that press the upper surfaces of parts 10, 11, and these arm parts 2
3 and 23 on the opposite side from the base portion 22, the arm portions 23 and 23 are connected to the bent base portion once bent upward, and are formed to stand up, and form the side surface 3b of the mounting support portion 3. ,3
a support part 2 that contacts b and works together with the base part 22 to apply a spring reaction force to the arm parts 23, 23 to press the pad shoulder parts 10, 11 downward;
It consists of 4. Further, arm portions 23 and 23 of the pad presser spring 21 are provided on the upper surfaces of the shoulder portions 10 and 11 on both sides of the inner and outer pads 6 and 7, respectively.
The pad holding spring 21 can be positioned by the engagement of the projections 10a, 11a with the U-shaped arm portions 23, 23.

As described above, according to the present invention, the pad holding spring is spaced apart from the lower surface of the caliper and is loaded across the lower surface of the mounting support of the torque receiving member and the upper surface of the pad, and the spring is directed downward to the pad. Since the reaction force is applied to suppress the free movement, and the spring reaction force does not act on the caliper at all, it is possible to avoid the floating phenomenon of the caliper and reduce the drag torque as in the conventional case. It is possible to prevent the occurrence of friction and uneven wear of the pads and slide pins, thereby providing excellent braking action over a long period of time. In particular, this padded presser spring is made of linear steel material, and includes a pair of linear base parts that contact the lower surface of the mounting support, and a pair of bent base parts that are bent outward on both sides from these base parts, and then bent downward once from the bent base parts. an arm part that is connected to this bent base and bent into a substantially U-shape in plan and presses the upper surface of the shoulder part on each side of the pair of pad back metals, and an arm part on the opposite side of the base part of these arm parts. The intermediate portion is formed to stand up and connect to the bent base that is once bent upward, connecting the arm portion, and comes into contact with the side surface of the mounting support portion and works together with the base portion to apply a spring reaction force to the arm portion. As mentioned above, the movement of the pad can be reliably suppressed without contacting the lower surface of the caliper, and as mentioned above, each bending part of the arm part and the support part can be The base part is bent upward and downward, and the base part acts as a kind of torsion bar, and the support part also acts as a spring to reduce the stress of the bent base that connects each part in series. Since it is designed to reduce concentration, it can significantly increase durability even though it is a single wire steel material. In addition, since the pad presser spring is made of a linear steel material, it is lightweight and has great practical effects in that it is easy to assemble.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a conventional disc brake, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a sectional view taken along the - line in Fig. 1. Fig. 5 is a half-sectional plan view showing an embodiment of the disc brake of the present invention, Fig. 6 is a sectional view taken along the - line in Fig. 5, and Fig. 7 is an example of a pad presser spring. , A is a plan view, B is a front view, and C is a right side view. DESCRIPTION OF SYMBOLS 1... Torque receiving member, 3... Mounting support part, 5... Torque receiving part, 6, 7... Pad, 8, 9... Back metal, 10, 11... Shoulder part, 12
...Caliper, 13...Cylinder device, 15...
Arm part of the caliper, 18...brake disc, 21...pad presser spring, 22...base part, 23...arm part, 24...support part.

Claims (1)

[Scope of utility model registration request] A torque receiving member fixed to the vehicle body side and a brake disc that rotates together with the wheel are sandwiched between each other, and shoulders on both sides of the back metal are hooked onto the torque receiving portion of the torque receiving member in a state where the brake disc can be slid in the axial direction of the brake disc. It has a pair of pads mounted on one side, a cylinder device for pressing the one pad on one side, an arm portion for pressing the other pad on the other side, and a mounting support portion that slides on both sides of the torque receiving member. In a disc brake equipped with a movably assembled caliper, the shoulder portion is attached downwardly at a distance from the lower surface of the caliper and straddles the lower surface of the mounting support of the torque receiving member and the upper surface of each pad back metal. a pair of linear base parts which are elastically loaded with a pad presser spring that presses the pad presser spring against the torque receiving part, and which hold the pad presser spring with a linear steel material and abut against the lower surface of the mounting support; These base portions are bent downward from the bent base portions bent outward on both sides, and connected to the bent base portions to form a substantially U-shaped planar shape, forming the shoulder of each side of the pair of pad back metals. An arm part that presses the upper surface of the part, and an intermediate part of these arm parts on the opposite side from the base part is formed to stand up and connect to the bent base part that is once bent upward to connect the arm part and provide a mounting support. 1. A disc brake comprising: a support part that comes into contact with a side surface of the pad and cooperates with the base part to apply a spring reaction force to the arm part to press the pad downward.