JP3487030B2 - Disc brake - Google Patents

Description

BACKGROUND OF THE INVENTION [0001] Field of the Invention The present invention is a disk with a valid pad pressing spring to enhance the effect of suppressing the so-called squeal
About brakes . 2. Description of the Related Art Friction pads (hereinafter simply referred to as pads)
As a disk brake having a structure in which the braking torque from the disk is received on a torque receiving surface provided on the outer peripheral side of the disk with respect to the center of the friction surface of the pad, for example, there is one disclosed in Japanese Utility Model Laid-Open No. 56-7129. [0003] Further, there is a type in which a pad presser spring is added as a countermeasure against rattle noise during traveling with this kind of brake and clonk noise at the beginning of braking (Japanese Utility Model Laid-Open No. 4-66430).
The brake shown in the former publication is shown in FIG. 3, and the brake shown in the latter publication is shown in FIG. In the brake shown in FIG. 3, the torque receiving surface 3 is disposed on the outer peripheral side of the disk D with respect to the center of the friction surface of the pad 2, so that the tangential force F is applied to the pad 2 with the fulcrum as a fulcrum.
Causes a couple Mf on the right side in the figure. [0005] The brake shown in FIG.
a pressing spring 5 made of a leaf spring for locking the a to the pad pin 4. The pressing portion 5b of the pressing spring 5 is locked in a concave portion on the outer periphery of the pad back plate, and the pressing portion 5b and the locking portion 5a. A pressing force Fx to the disk ejecting side and a pressing force Fy to the disk inner peripheral side are applied to the pad 2 by a spring force generated between the elastic deformation portion 5c and the elastic deformation portion 5c. In the brake shown in FIG. 3, the couple Mf is set to be slightly larger than Mv.
At the initial stage of braking, the pad 2 rotates clockwise in the drawing within the range of the clearance with the torque receiving portion, and this movement triggers the brake squeal during braking. In the brake shown in FIG. 4, the pad is pressed to the inner peripheral side of the disk by the presser spring 5 on the disk outlet side from the center of the pad in the tangential direction of the disk.
The couple generated on the pad 2 by the force of Fy turns counterclockwise in the figure,
Therefore, when a strong couple in the opposite direction (clockwise) due to the offset of the torque receiving surface 3 acts, the couple due to the force of Fy is lost, and the pad 2 rotates clockwise in the drawing within the range of the clearance. As a result of the movement, squeal during braking is likely to occur similarly to the brake of FIG. The present invention is directed to a disk brake provided with a pad pressing spring which solves such a problem and enhances the effect of suppressing squeal.
The goal is to provide a cookie . [0009] [Means for Solving the Problems] To solve the above problems, in the present invention, locked to the back plate outer periphery of each pad with the disc rotation entrance side of the disc tangential direction center of the friction pad A pressurizing portion, a reaction force receiving portion to be locked to a brake fixing portion, and an elastic deformation portion provided between the pressurizing portion and the reaction force receiving portion, wherein the reaction force receiving portion is fixed to the brake. Bei the pad retainer spring elastic deformation portion is so pressing force from the pressing elastically deformed to the disk rotation exit side and the disk inner circumference side to the pad is applied respectively in a state in which to engage with the part
I got it. [0010] It is desirable that the counterpart material for locking the reaction force receiving portion of the presser spring is a pad pin provided on each of the disk inflow side and the outflow side. If the shape of the spring is devised, the spring of the present invention can be applied to the brake as shown in FIG. 3 which supports the torque member slidably in the axial direction of the disk. Then, it is easy to secure the installation space for the spring, and the processing and assembly of the spring can be easily performed. The presser spring used in the present invention biases the pressing portion 5b of the spring shown in FIG. 4 toward the disk reciprocating side, and reciprocates the disk from the pressing portion more than the center of the pad 2 in the disk tangential direction. F on the side
It can be considered that the force of x and Fy is applied. When this pressing spring is used, the couple generated on the pad by the force of Fy is in the same direction as the couple Mf generated by the offset of the torque receiving surface, and the force allows rotation in the Mf direction. Since the clearance has been absorbed in advance, the pad does not rotate due to the couple Mf at the beginning of braking, which triggers the squeal. FIG. 1 shows a first embodiment of the present invention. The pad pressing spring 10 is a caliper that supports an open-top caliper by a slide guide (not shown) provided between a fixing member (not shown) and the caliper 1 so as to be slidable in the disk axial direction. It is intended for installation of floating disc brakes. The pair of opposing pads 2 loosely passes two pad pins 4 laid in the window holes of the caliper 1 through the pin holes of the back plate 2a and supports the pads 2 so as to be slidable in the disk axial direction. . Further, the torque receiving surface 3 is provided at a position L-offset from the center of the friction surface of the pad 2 (the center in the disk radial direction) toward the outer peripheral side of the disk. The pad presser spring 10 is formed by punching and bending a leaf spring material and locking it to the inside of the pad pin 4 on the disk reciprocating side (right side in the figure), and the disk reciprocating side. Reaction force receiving portion 1 to be locked to the pad pin of
2, a pressurizing portion 13 which is engaged with a projection on the outer periphery of the pad back plate 2a on the disk reciprocating side with respect to the disk tangential center of the pad 2, and an elasticity extending from each reaction force receiving portion toward the center of the disk tangential direction. A deformed portion 14 and a cover portion 15 are created. The pressing spring 10 is configured such that the elastic deformation portion 14 is elastically deformed in a state where the first and second reaction force receiving portions 11 and 12 are engaged with the two pad pins 4 and 4, and the spring force generated there. Pressing part 13 in contact with the back plate of each pad
The force Fx and Fy shown in FIG. The pads 2 are pressed against the disc receiving side torque receiving surface 3 by the forces Fx and Fy.
The back plate 2a rotates clockwise to the point where it comes into contact with the torque receiving surface on the disk revolving side and is restricted in rotation. For this reason, the couple Mf generated in the pad due to the offset of L during braking is received by the torque receiving surface on the disk reversal side where the pad 2 is already in contact, and the couple Mf
The movement of the pad at the initial stage of braking due to is prevented. The cover 15 is not in contact with the pad back plate. The cover portion 15 is provided for the purpose of reducing intrusion of mud and water into the pad sliding contact portion, and is a preferable element, but is not essential. FIG. 2 shows a second embodiment. The presser spring 20 is obtained by adding the function and effect of the present invention to the forcible return line spring of the pad 2 used for reducing the drag of the pad by the disk. As shown in the figure, a coil-shaped reaction force is formed by bending a spring wire back into a V-shape at the center in the middle direction, and passing the pad pins 4 on the disk re-entrant side to positions closer to one end and the other end from the bent-back point. A first pressing portion 22 formed in a U-shape, having a receiving portion 21 formed thereon, one end and the other end of which are directed toward the disk ejecting side, and a portion of which is contacted with the outer periphery of the pad back plate 2a. A second pressing portion 23 to be locked in a hole on the center outer periphery of the plate 2a and an elastic deformation portion 24 are formed. 2B, the elastic deformation portion 24 between the reaction force receiving portion 21 and the second pressing portion 23 is bent in the mounted state shown in FIG. Pressurizing section 2
The force of 2 to Fy and the force of Fx from the second pressing unit 23 are applied to each pad 2. Also, this spring 20
Is spread between the pair of pads, the central bent-back portion is also compressed and elastically deformed, and a separating force is applied to the pads 2, 2 from the two reaction force receiving portions 21, 21 by the spring force generated there. Therefore, the pad 2 is forcibly separated from the disk when the brake cylinder is depressurized, and the drag torque is reduced. Since the pressing spring 20 also biases the first pressing portion 22 toward the disc reciprocating side, the couple force generated in the pad 2 by the force of Fy becomes the same direction as the couple force Mf. The same operation and effect as those of the first embodiment can be obtained. As described above, the disk drive according to the present invention is
The rake has a pad holding bar to prevent rattling and cloning.
The pad pressing into the disk periphery to provide Ne biased to the disk rotation entrance side, opposite to the disk rotation caused the pad offset orientation torque receiving surfaces of the couple of forces generated in the pad by the force of the presser spring Since the direction of the couple Mf is set to coincide with the direction of the couple Mf, the pad is not moved by the couple Mf at the initial stage of braking, so that there is no trigger of the pad vibration, and an effect is obtained that the brake becomes difficult to squeak during braking.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a): plan view showing a use state of the first embodiment (b): cross-sectional view taken along line XX of the above embodiment FIG. 2 (a): FIG. FIG. 3 (b) is a cross-sectional view taken along line YY of the same embodiment. FIG. 3 is a cross-sectional view of a conventional example of a brake in which the torque receiving surface is offset to the disk outer peripheral side. Sectional view of a conventional example of a brake in which a receiving surface is offset and a pad pressing spring is added. [Description of References] 1 Caliper 2 Pad 2a Back plate 3 Torque receiving surface 4 Pad pin 5 Pressing spring 10, 20 Pad pressing spring 11 Force receiving portion 12 Second reaction receiving portion 13 Pressing portion 14 Elastic deformation portion 21 Reaction force receiving portion 22 First pressing portion 23 Second pressing portion 24 Elastic deformation portion

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-44750 (JP, A) JP-A-57-163736 (JP, A) JP-A-56-7129 (JP, U) JP-A-5-163736 66430 (JP, U) Japanese Utility Model Showa 55-170530 (JP, U) Japanese Utility Model Showa 57-130029 (JP, U) Japanese Utility Model Utility Model 3-130928 (JP, U) (58) Field surveyed (Int. ⁷ , DB name) F16D 65/097

Claims (1)

(57) Claims 1. A braking torque from a friction pad at a torque receiving surface provided with a friction pad interposed therebetween and opposed to the outer peripheral side of the disk from the center of the friction surface of the friction pad. Receive
Oite the Puntoppu type disk brake, a pressing of engaged disk rotation-in side on the back plate outer periphery of each pad than the disc tangential direction center of the friction pad, the reaction force receiving portion engaged to the fixed part of the brake And an elastic deformation portion provided between the pressurizing portion and the reaction force receiving portion, and the elastic deformation portion elastically deforms in a state where the reaction force receiving portion is locked to a fixed portion of a brake. Pressing force is applied to the pad from the pressurizing portion to the disk feeding side and the disk inner peripheral side, respectively.
Disconnect <br/> Kubure key, characterized in that it allowed comprising a pad presser springs.