JPH04502199A - disc brake - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Name of invention = “Disc brake” The present invention assists in driving and contacting the brake pads to the disc to be braked. Concerning disc brakes of the type in which a number of disc springs are arranged in a superposed state for the purpose of operation. do. Thus, the above spring is directed towards the disc to generate braking force. to supply the force that presses the brake pads. Such brakes are generally They are provided in pairs on both sides of the disk so that they operate simultaneously. This tag type disc brakes, while providing acceptable fatigue life. One problem arises because of the limited flexural deformation that the spring can withstand. In fact, in a polymerized state The one at the working end of a given disc spring, i.e. the one closest to the brake pad, is It is known that it undergoes more bending deformation than the countersunk at the stationary end. . especially axial or tilted movement of the disc relative to the brake pads. When the disc is unable to apply the brake, the brake is turned off when the brake is applied. The air gap required between the disc and the disc spring is The amount of movement may be more than your body can handle. The above void is A gap of 25 mm is desirable, but the bending deformation of the disc spring at the working end of the polymer The limit amount cannot be exceeded, and the limit amount is approximately 4 mm. I know. The total spring force is also the pressure that can be applied without causing fatigue life problems. It is difficult to make adjustments due to changes in shrinkage.

The present invention is such that larger voids can be achieved with acceptable fatigue life. The purpose is to provide type disc brakes.

The present invention cooperates with the brake pad to bring it into contact with the disc to be braked. a plurality of disc springs arranged as a polymer to drive the brake pad; Move the brake pad away from the disc while compressing the spring. the spring is arranged as a combination of a plurality of subtypes; At the same time, each sub-type assembly is housed in a cup consisting of a bottom plate and a wall, and the upper The bottom plate is arranged so as to overlap within the polymer, and the wall supports the pressure of the sub-type combination. It is characterized by being arranged so as to extend parallel to the above polymer in order to limit shrinkage. There is.

In the disc brake described above, the spring polymer has an operating end and a stationary end, respectively. It moves as a polymer divided into several units (as a result of which The maximum flexural deformation experienced by the spring also increases the fatigue life and reduced while allowing for voids.

Further, it is preferable that the retracting means has a piston/cylinder structure. and preferably the structure has means for adjusting its stroke. . In order to easily enable force adjustment, the present disc brake preferably has the above-mentioned A means for adjusting the distance of the piston-cylinder structure from said disk is provided therein. It is withering.

In order to adjust the air gap between the above brake pad and disc, this disc brake The rake is arranged toward or away from said disc relative to said retraction means. Means is provided for adjusting the position of the brake pad so as to move it away from the brake pad.

In order to provide uniform force across the brake pad, the brake pad , may be provided on a tiltable support part, which support part is preferably two-dimensionally tiltable ( It has a partially spherical inclined surface that allows this.

The support part also has a partially spherical surface concentric with the inclined part to The brake may be arranged to transmit braking force to the key fixing body.

Detailed description with reference to the accompanying drawings of an exemplary disc brake of the invention Do this.

The figure is a schematic vertical cross-sectional view of a disc brake.

The disc brake 30 of the embodiment is provided on a shaft (not shown) to be braked. Two caliper halves 32 (only one is shown) are disposed on either side of the disc 34. ). Each caliper half 32 applies a braking force to a disc 34. In order to obtain. The caliper half 32 has a brake pad 36 and a disc 34 on both sides. are arranged to operate at the same time.

Each caliper half 32 includes a caliper body 38 having bolt holes 40 therein. , whereby the main body 38 is attached to a support fixed by a bolt (not shown). The portion 42 is clamped. The bodies 38 of the two caliper halves 32 are located on both sides of the support 42. is tightened. The caliper halves 32 have the same structure, so the following Only one will be described here.

The caliper body 38 has a disc shape and extends parallel to the disc 34. . Body 38 has a hole therethrough. The university has disc 34 and cylindrical with respect to the normally extending axis 46 of the enlarged diameter section 48 closest to the disk 34; It has a section 50 that is shaped, within which the section 50 is open. Part 48 is horizontal It is rectangular in cross section. Portions 48 and 50 are separated by a step 52 .

The four posts 54 of the caliper half 32 are provided in the body 38 and extend from the disc 34. It protrudes parallel to the axis 46 so as to move away from it. For deformation of the brake 30 of the embodiment In some cases, there may be three or more posts 54. The post 54 is 38 with a stepped portion 56 having an externally threaded end remote from 38; A cross beam member 58 of the caliper half 32 is supported.

The cross beam member 58 has a disk shape extending parallel to the disk 34 and the main body 38. . The member 58 has four threaded holes, and four male threaded threads are inserted therein. There is a pacer 60. Each spacer 60 generally has a central hole 62 therethrough and a diagonal. It is cylindrical in shape with an external flange 64 at the end remote from the disk 34. Spacer 60 is larger than the thickness of the cross beam member 58. Each threaded end of post 54 has a The spacer 60 is rotated until the end surface without a flange of the spacer 60 collides with the stepped portion 56. is received in the bore 62 and the spacer 60 and thus the crossbeam member 58 is by a nut 66 that engages the post 54 until it abuts the flange 64 of the server 60. , is held in a threaded post 54. Between the main body 38 and the cross beam member 58 Spacing involves rotating spacer 60 into an externally threaded hole in member 58. It can be adjusted by The flange 64 has the above-mentioned adjustment when it collides with the member 58. It sets the limits of regulation.

The cylinder 68 of the caliper half 32 is integrally formed with the cross beam member 58.

Cylinder 68 is symmetrical about axis 46 and extends away from disk 34. It protrudes from the member 58. Cylinder 68 has an end cap 70. , the interior of which is communicated by a radially extending port 72 adjacent member 58. ing. Piston 74 is retained within member 58 and end cap 70 within the cylinder. inside the cylinder 66 between the range limited by the annular spacer 76 It can be moved at any time. Introduction of hydraulic fluid through port 72 (as shown) ) The piston 74 moves away from the disk 34 until it engages the spacer 76. Move the sea urchin. Spacer 76 may be replaced by spacers of different thicknesses. Therefore, there is no way to adjust the stroke of the piston/cylinder structure 68°74. It has steps. Piston 74 has a longitudinal axis coaxial with axis 46. It is held by a piston rod 78 having a diameter. The piston 74 is a slit co. The piston lock is secured by means of a bolt 71, a retaining ring 73 and a spring clip 75. It is held in the head 78. The piston rod 78 has a bore 80 passing through the cross member 58. The bore 80 projects out of the cylinder 68 toward the passage disk 34 and seals 82 . It is set in. Additionally, a drain port 81 drains fluid passing through the seal 82. prepared for release. The piston rod 78 is closest to the disk 34. It has a recess 83 with a cylindrical female thread at the lower end. In recess 83, A threaded retaining member 84 is screwed together. Position of member 84 in recess 83 The axial bore is inserted through the piston rod 78 and the bore 87 in the end cap 70. towards the disk 34 by means of a spindle 86 extending along the It can be adjusted so that it moves away from the disk 34. The cross section is hexagonal. by means of a wrench applied to the end projecting beyond the end cap 70. It can be rotated as follows. The spindle 86 fits tightly within the retaining member 84. As the spindle 86 rotates, the member 8 4 also rotates. A spring 88 is contained within a cylindrical passage within member 84 that enters passage 89. It is. A spring 88 attaches to the step of member 84 and spindle 86 at the end of passageway 89. The bushing 90 has a flange provided thereon, so that the spindle 86 is biased away from disk 34.

The spindle 86 extends beyond the member 84 as a threaded end 92 to the disk 3. It continues towards 4. Threaded end 92 is attached to end 100 of member 84. A spindle 86 extends from the disk 34 relative to the member 84 and extends into the recess. It has a first nut that helps prevent it from moving away.

The surface of the end 100 of the threaded retaining member 84 closest to the disk 34 is The pusher of the caliper half 32, which is a spherical surface and has a brake pad 36 They are engaged by complementary sloped surfaces of the pressure plate 102. The plate 102 is a brake pad. A tiltable support is provided for the door 36. The partial spherical surface of the support member 84 and the Engagement with pressure plate 102 swings adjacent pad 36 relative to disk 34. It is allowed. The pressure plate 102 passes through an internal hole (this hole is partially Clearance is provided around 92) Spindle 86 was unscrewed. It is held to the support member 84 by a second nut 103 that threads onto the end 92. . The nut 103 is attached to the press plate 102 covered by the brake pad 36. It is received within a recess and acts on a spring 109 within the recess. push The pressure plate 102 has a cylindrical protrusion 101 facing the cross beam member 58. Projection 101 forms a stepped portion 105 of the main body of the pressing plate 102 (the stepped portion 105 is similar to the stepped portion 5). 2, so that movement of plate 102 away from disk 34 is restricted. ). The outer surface 107 of the projection 101 is the same as the surface of the end 100 of the support member 84. It is a partial spherical surface with a center of curvature, and therefore has the same center as the inclined surface of the pressing plate 102. Motsu. Surface 107 engages a surface of portion 50 of the bore through body 38 and 111 is set on this surface.

The piston rod 78 also has an outer end flange 1 at its end closest to the disk 34. It has 06. This flange 106 faces and towards the cross member 58. Impact is generated by an annular reaction member 108 having a tapered frustoconical surface 110. be touched. This reaction member 108 is located within the protrusion 101 of the pressing plate 102.

Two spring units of the caliper half 32 are installed between the reaction member 1 (18) and the cross beam member 58. A seat 120 is provided. However, the deformation of the brake 30 in the embodiment In this case, there may be more identical units than two spring units 120.

Both spring units 120 include a plurality of disc springs 1 inserted through the piston rod 78. 22, and the container spring 122 is provided with a brake pad 36 to be braked. are arranged in a superposed state for cooperating to contact and press the disc 34; ing. Each spring unit 120 includes six discs received within a cup 124. It has a subtype combination of Ne122. However, the six disc springs in the subpolymer 122 may be more (or less); each cup 124 is has an annular bottom plate 126 extending around the piston rod 78; It has a bottom plate 126 and an integral cylindrical wall 128. Wall 128 limits compression of subtype coalescence It operates as follows. The secondary assembly of the disc spring 122 engages the bottom plate 126 within the wall 128. and protrude further away from the bottom plate 126 than the wall 128. one The bottom plate 126 of the cup 124 collides with the cross beam member 58, while the sub-type combination thereof , hits the bottom plate of another cup 124 that hits the surface 110 of the reaction member 108 one after another. do. A bellows-shaped cover 130 is provided to prevent dust from entering the splash unit. It extends around the unit 120 from the body 38 to the cross member 58. cover 1 30 expands or contracts when the distance between the main body 38 and the cross beam member 58 is adjusted. spring 122 and can be easily removed to allow inspection of spring 122. Bottom plate 1 26 includes a polymeric disc spring 122 while a wall 128 limits compression of each subtype assembly. It is useful for dividing into subtype combinations. In this way, the spring 122 has multiple secondary weights. each sub-type combination is housed within a cup 124; 4 is a bottom plate 126 extending through the polymer to limit compression of the sub-mold coalescence. and a wall 128 extending parallel to the polymer.

When the disc brake 30 of the embodiment operates, the hydraulic fluid under pressure is As long as the supply of It is pushed oppositely (to the left in the diagram). The piston 74 is a piston rod 78 is pushed away from the disk 34. This is far from disk 34. The support member 84 is moved in a circular motion, so that the spindle 86 is separated from the member 84. The actuation of the spring 88 that moves the brake pad 36 away from the disc 34 Move it so that it will move. The flange 106 of the piston rod 78 also connects to the disc 34. As a result, the reaction member 108 is pushed away from the spring unit 1 Compress 20. The two spring units 120 are compressed equally, so one spring Gap 13 between wall 128 of spring unit 120 and bottom plate 126 of another spring unit 2 is a gap 134 between the wall 128 of the other spring unit 120 and the reaction member 108 It should be noted that . Thus, the compression of the spring unit 120 In this case, the individual springs 122 move more evenly than without the cups 124. Special , the spring 122 closest to the reaction member 108 is smaller than when there is no cup 124. Make smaller movements. The piston-cylinder structure 68.74 has a spring 122. To move the brake pad 36 away from the disc 34 while compressing it. Provides retraction means that can be operated. The amount of compression of the spring 122 is the piston cylinder forming means for adjusting the distance of the da structure 68, 74 from the disc 34; Controlled by the setting of spacer 60.

The spindle 86 is mounted on the disk 3 relative to the piston and cylinder structure 68.74. Brake pad position 36 toward 4 or away from the same disc. position, thereby adjusting the air gap 136 between the pad 36 and the disc 34. provides the means to do so.

When it is desired to apply braking force to the disc 34, the port 72 is communicated with the return tank. The spring 122 presses against the reaction member 108, so that the piston rod 78° press plate 102 and brake pad 36 are forced toward disk 34. Bu The rake pad 36 engages a disc 34 that applies a braking force, and The engagement of surface 107 with the surface of portion 50 causes caliper half 38 and thus From there it is transmitted as a reaction to the support 42. During this movement, the requested movement Because the energy is shared equally between the springs 122, more than is the case with conventional polymers, The presence of cup 124 reduces the maximum movement made by any spring 122. It should be noted that

In fact, the air gap 136 between the disc 34 and the brake pad 36 in the retracted position is , the amount of deformation of the container spring 122 in each sub-type union of the disc spring 122 is approximately 4II1 m. can be formed in such a way as to achieve an acceptable fatigue life. It has been discovered.

international search report international search report PCT/GB 90101360 S^　40194 (NcoFCI Yoi-pea) 1

Claims (7)

[Claims] 1. Bringing the brake pad (36) into contact with the disc (34) to be braked A large number of polymers are arranged as a polymer to work together to drive the brake pad. While compressing the disc spring (122), insert the brake pad onto the disc. retraction means (68, 74) operable to move it away from the , the spring (122) is arranged as a plurality of subpolymers, and each subpolymer The body is housed in a cup (124) consisting of a bottom plate (126) and a wall (128). , the bottom plate is disposed in an overlapping manner within the polymer, and the wall is in the subpolymer. characterized by being arranged so as to extend parallel to the polymer in order to limit compression of the polymer. Yes, disc brakes. 2. The disc brake according to claim 1, wherein the retraction means (68, 74 ) is configured as a piston-cylinder structure. brake. 3. The disc brake according to claim 2, wherein the brake also includes the pin A means (76) is provided for adjusting the stroke of the stone cylinder structure. Disc brakes. 4. The disc brake according to any one of claims 2 and 3, A rake also removes the piston-cylinder structure (from the disk (34)). 68, 74) and a means (60) for adjusting the distance. , disc brakes. 5. The disc brake according to any one of claims 1 to 4, A brake is also provided on the disc (3) relative to the retraction means (68, 74). 4) Adjust the position of the brake pad (36) so that it moves toward or away from the A disc brake characterized in that it is provided with means (84, 86) for adjusting. 6. The disc brake according to any one of claims 1 to 5, The brake pad (36) is provided on the inclined support part (102). , disc brakes. 7. A disc brake according to claim 6, wherein the support (102) is partially A disc brake characterized by having a spherical inclined surface. 8. As stated in claim 7 In the above-mentioned disc brake, the support portion (102) has a surface concentric with the inclined surface thereof. It has a partially spherical surface (107) and is restrained by the fixed body (38) of the disc brake. A disc brake is characterized by being arranged to transmit power.