Disc brake caliper body for vehicle

Abstract

A caliper body of a disc brake for a vehicle, which suppresses an increase in weight while achieving an increase in rigidity by reinforcing ribs, wherein a pair of first reinforcing ribs 28, 28 extending from a cylinder portion side to a disc rotor run-out side are provided on a disc radius direction outer side and a disc radius direction inner side of a disc rotor opposite side face 21h of a run-out side body portion 21g of the caliper body 3. A pair of second reinforcing ribs 29, 29 extending from the cylinder portion side to a disc rotor run-in side are provided on a disc radius direction outer side and a disc radius direction inner side of the disc rotor opposite side face 21h of a run-in side body portion 21j. A first thinning portion 21i serving as a thin-walled portion is provided on the disc rotor opposite side face 21h between the pair of first reinforcing ribs 28, 28, and a second thinning portion 21k serving as a thin-walled portion is provided on the disc rotor opposite side face 21h between the pair of second reinforcing ribs 29, 29.

Description

Technical Field

[0001] This invention relates to the brake caliper body of a disc brake for a vehicle, and more specifically, to the brake caliper body of a disc brake for a vehicle having reinforcing ribs. Background Technology

[0002] Currently, among disc brakes for vehicles, there are disc brakes for vehicles that, when hydraulic pressure is supplied to the hydraulic chamber formed between the cylinder bore and the piston during braking, in order to suppress the bottom wall of the cylinder bore from bulging toward the opposite side of the disc rotor, have reinforcing ribs provided on the brake caliper body (for example, see Patent Documents 1 and 2).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2003-65368

[0006] Patent Document 2: Japanese Patent No. 4818307 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] However, in the aforementioned patent documents 1 and 2, the reinforcement ribs are welded onto the brake caliper body, which can ensure the rigidity of the brake caliper body but increases the weight.

[0009] Therefore, the object of the present invention is to provide a brake caliper body for a disc brake for a vehicle that can suppress weight increase while improving the rigidity of the brake caliper body through reinforcing ribs.

[0010] Technical solutions for solving the problem

[0011] To achieve the above objectives, the brake caliper body of the disc brake for vehicles of the present invention is provided across the outer periphery of the disc rotor, and an operating portion having a cylinder portion for piston insertion is disposed on the side of the disc rotor. The operating portion is characterized by comprising a disc-out main body extending from the cylinder portion toward the disc-out side when the vehicle is moving forward, and a disc-in main body extending from the cylinder portion toward the disc-in side when the vehicle is moving forward. A pair of disc-out side reinforcing ribs extending from the cylinder portion toward the disc-out side are provided on the outer side and inner side of the disc rotor opposite to the disc rotor side of the disc-out side main body in the disc radius direction. A pair of disc-in side reinforcing ribs extending from the cylinder portion toward the disc-out side are provided on the outer side and inner side of the disc rotor opposite to the disc rotor side of the disc-in side main body in the disc radius direction. Furthermore, thin-walled portions are provided on the disc rotor opposite sides between the pair of disc-out side reinforcing ribs and on the disc rotor opposite sides between the pair of disc-in side reinforcing ribs.

[0012] In addition, preferably, the disc-out reinforcing rib and the disc-in reinforcing rib are formed continuously with the cylinder portion, and the disc rotor-opposite side of the disc-out reinforcing rib and the disc rotor-opposite side of the disc rotor reinforcing rib are located on the same plane as the disc rotor-opposite side of the cylinder portion, or are formed on the disc rotor side closer to the disc rotor than the disc rotor-opposite side of the cylinder portion.

[0013] Furthermore, the brake caliper body can be formed by connecting a pair of the operating parts disposed on both sides of the disc rotor using a bridging portion that spans the outer periphery of the disc rotor.

[0014] Alternatively, preferably, the rotating-out side main body and the rotating-in side main body of the functional part are provided with a body mounting part, which has a bolt insertion hole in the radial direction of the disc through which the body mounting bolt is inserted.

[0015] Furthermore, it is preferable that the functional part is provided with a body mounting part, which has a bolt insertion hole in the disc axis through which a body mounting bolt is inserted.

[0016] Invention Effects

[0017] According to the present invention, a pair of disc-type brake caliper bodies for vehicles have a pair of disc-out reinforcing ribs extending from the cylinder side toward the disc-out side on the outer and inner sides of the disc rotor opposite to the disc rotor in the disc-out side main body. Similarly, a pair of disc-in side reinforcing ribs extending from the cylinder side toward the disc-in side are formed on the outer and inner sides of the disc rotor opposite to the disc rotor in the disc-in side main body. This improves the rigidity of the brake caliper body and suppresses the cylinder from bulging toward the disc rotor opposite to the disc rotor during braking. Furthermore, thin-walled portions are formed on the disc rotor opposite sides between the pair of disc-out side reinforcing ribs and between the pair of disc-in side reinforcing ribs, thereby suppressing an increase in the weight of the brake caliper body.

[0018] Furthermore, the reinforcing ribs on the disc-out side and the disc-in side are continuously formed with the cylinder. The opposite side of the disc rotor of the reinforcing rib on the disc-out side and the opposite side of the disc rotor of the reinforcing rib on the disc-in side are located on the same plane as the opposite side of the disc rotor of the cylinder, or are formed on the disc rotor side closer to the cylinder than the opposite side of the disc rotor of the cylinder. Thus, it is possible to achieve weight reduction without making the brake caliper body larger, while ensuring rigidity.

[0019] In addition, the brake caliper body is formed by connecting a pair of working parts located on both sides of the disc rotor using a bridging portion that spans the outer periphery of the disc rotor. This can suppress the increase in weight of the piston-opposed and split brake caliper body, while improving rigidity.

[0020] Furthermore, a body mounting portion is provided on the outward-turning main body and the inward-turning main body of the action part. This body mounting portion has a bolt insertion hole in the radial direction of the disc through which the body mounting bolts are inserted. As a result, the increase in weight of the radially mounted brake caliper body can be suppressed, while the rigidity can be improved.

[0021] In addition, a body mounting part is provided in the working part, which has a bolt insertion hole in the disc axis through which the body mounting bolts are inserted. This can suppress the increase in weight of the axially mounted brake caliper body and improve rigidity. Attached Figure Description

[0022] Figure 1 This is a front view showing a disc brake for a vehicle according to an embodiment of the present invention.

[0023] Figure 2 This is a rear view of the same vehicle using disc brakes.

[0024] Figure 3 This is a top view of the disc brakes used on the same vehicle.

[0025] Figure 4 This is a side view of the disc brake used on the same vehicle.

[0026] Figure 5 yes Figure 4 V-V sectional view.

[0027] Figure 6 yes Figure 1 Sectional view VI-VI.

[0028] Figure 7 yes Figure 1 Sectional view of VII-VII.

[0029] Figure 8 This is an illustrative diagram showing the assembly of the friction pad and pad spring onto the brake caliper body.

[0030] Figure 9 This is a 3D diagram of a spring pad. Detailed Implementation

[0031] Figures 1-9 This is a diagram illustrating an embodiment of the disc brake and friction pad for vehicles according to the present invention. Arrow A indicates the rotation direction of the disc rotor that rotates integrally with the wheel when the vehicle is moving forward. The disc-out side and disc-in side described below refer to the disc-out side and disc-in side when the vehicle is moving forward.

[0032] The vehicle disc brake 1 includes a disc rotor 2 that rotates integrally with a wheel (not shown) in the direction of arrow A, a brake caliper body 3 mounted on one side of the disc rotor 2 on the vehicle body, and a pair of friction pads 5, 5 sandwiched inside the brake caliper body 3 and arranged opposite each other and suspended by a hanger pin 4. A pad spring 6 abuts against the friction pads 5, 5 to suppress the shaking of the friction pads 5, 5.

[0033] The brake caliper body 3 is a radially mounted, segmented brake caliper body. It is divided by a bridging portion 3a spanning the outer periphery of the disc rotor 2, and the brake caliper half 21 on the opposite side of the vehicle body (the brake caliper half of this application) and the brake caliper half 31 on the vehicle body side (the brake caliper half of this application) are connected into one piece by two connecting bolts 7, 7. In addition, a rectangular top opening 3b is formed in the center of the circumference of the bridging portion 3a. The top opening 3b has wall portions 3c, 3c parallel to the disc rotor 2 and a wall portion parallel to the disc shaft.

[0034] The brake caliper half 21 on the opposite side of the vehicle body has: an action part 21b in which cylinder portions 21a and 21a, each having a cylinder bore 22 for piston 8 insertion, are arranged side-by-side in the circumferential direction of the disc; and a bridging part half 21c that constitutes approximately half of the bridging part 3a. The brake caliper half 31 on the opposite side of the vehicle body also has, like the brake caliper half 21 on the opposite side of the vehicle body, an action part 31b in which cylinder portions 31a and 31a, each having a cylinder bore 32 for piston 8 insertion, are arranged side-by-side in the circumferential direction of the disc; and a bridging part half 31c that constitutes approximately half of the bridging part 3a. Furthermore, the bridging part half 21c and 31c respectively have a top surface opening 21d on the opposite side of the vehicle body and a top surface opening 31d on the side of the vehicle body, each constituting approximately half of the top surface opening 3b.

[0035] The brake caliper half 21 on the opposite side of the vehicle body is divided into hydraulic chambers 23 and 23, which introduce working fluid into the bottom side of cylinder bores 22 and 22 and between pistons 8 and 8. Furthermore, a first working fluid inlet hole 24 passes through the hydraulic chamber 23 on the cylinder bore 22, which is the joint surface of the bridging half 21c, from the rotating-out side towards the rotating-out side. A portion of the bottom of the cylinder bore 22 on the rotating-out side has a first contouring section 25a that connects the hydraulic chamber 23 on the rotating-out side to the first working fluid inlet hole 24 through contouring, and a second contouring section 25b that contours the hydraulic chamber 23 on the rotating-in side. Moreover, a third contouring section 25c is formed on a portion of the bottom of the cylinder bore 22 on the rotating-in side, facing the second contouring section 25b. By connecting the second contouring section 25b and the third contouring section 25c, the first working fluid inlet hole 24, the hydraulic chamber 23 on the rotating-out side, and the hydraulic chamber 23 on the rotating-in side are connected.

[0036] Furthermore, a connecting hole 26 is provided on the disc-out side of the bridging half 21c, opening into the disc-out side 21f of the bridging half 21c and the first working fluid inlet hole 24. An internal thread 26a is formed in the connecting hole 26 for screwing a connecting bolt (not shown) into the opening side. Additionally, radially mounted body mounting portions 27, 27 are formed on the disc-in and disc-out sides of the brake caliper half 21 on the opposite side of the vehicle body. These body mounting portions 27, 27 have mounting bolt insertion holes 27a, 27a in the disc radius direction. By screwing the mounting bolts inserted into these mounting bolt insertion holes 27a, 27a into the brake caliper mounting portions provided on the vehicle body side, the brake caliper body 3 is mounted to the vehicle body. Furthermore, large-diameter flange portions 27b, 27b for reinforcement are formed at the outer end and inner end of each body mounting portion 27 in the disc radius direction.

[0037] Furthermore, the working part 21b of the brake caliper half 21 on the opposite side of the vehicle body includes: cylinder portions 21a, 21a having cylinder bores 22, 22; a rotating-out side main body 21g extending from the cylinder portion 21a on the rotating-out side to the rotating-out side; and a rotating-in side main body 21j extending from the cylinder portion 21a on the rotating-in side to the rotating-in side. A pair of first reinforcing ribs 28, 28 (the rotating-out side reinforcing ribs of this application) are provided on the outer side and inner side of the rotating-out side main body 21g on the opposite side of the rotating rotor in the disc radius direction. The first reinforcing rib 28 on the outer side in the disc radius direction connects the cylinder portion 21a on the rotating-out side and the large-diameter flange portion 27b on the outer side in the disc radius direction of the rotating-out side vehicle body mounting part 27 on the rotating-out side. In addition, the first reinforcing rib 28 on the inner side in the disc radius direction connects the cylinder portion 21a on the rotating-out side and the large-diameter flange portion 27b on the inner side in the disc radius direction of the rotating-out side vehicle body mounting part 27 on the rotating-out side. Furthermore, a first thinning portion 21i, which becomes a thin-walled portion, is formed on the opposite side 21h of the disc rotor between the first reinforcing ribs 28 and 28 through a casting hole.

[0038] Furthermore, a pair of second reinforcing ribs 29, 29 (the disc-side reinforcing ribs of this application) are provided on the outer side and inner side of the disc-type rotor opposite side 21h of the main body 21j on the disc-side. The second reinforcing rib 29 on the outer side in the disc-side radius direction connects the cylinder portion 21a on the disc-side and the large-diameter flange portion 27b on the outer side in the disc-side radius direction of the body mounting portion 27 on the disc-side. In addition, the second reinforcing rib 29 on the inner side in the disc-side radius direction connects the cylinder portion 21a on the disc-side and the large-diameter flange portion 27b on the inner side in the disc-side radius direction of the body mounting portion 27 on the disc-side. Moreover, a second thinned portion 21k, which becomes a thin-walled portion, is formed on the disc-type rotor opposite side 21h between the second reinforcing ribs 29, 29 through a casting hole.

[0039] In addition, such as Figure 1 and Figure 6As shown, the outer surface (opposite side of the disc rotor) OS1 of each first reinforcing rib 28 is formed by gradually tilting towards the disc rotor side from the outer surface OS2 (opposite side of the disc rotor) of the cylinder 21a. Similarly, the outer surface (opposite side of the disc rotor) OS3 of each second reinforcing rib 29 is also formed by gradually tilting towards the disc rotor side from the outer surface OS2 (opposite side of the disc rotor) of the cylinder 21a towards the disc rotor side.

[0040] In addition, a mounting boss 30 is formed in the center of the circumference of the outer side of the disk in the radial direction of the working part 21b, which has a pin insertion hole 30a through which the lifting pin 4 is inserted.

[0041] The brake caliper half 31 on the vehicle side is divided into hydraulic chambers 33 and 33, which introduce working fluid into the bottom side of cylinder bores 32 and 32 and between pistons 8 and 8. Furthermore, a second working fluid inlet hole 34 passes through the hydraulic chamber 33 on the rotating side from the rotating side of the dividing surface 31e, which forms the mating surface of the bridging half 31c. The first working fluid inlet hole 24 and the second working fluid inlet hole 34 communicate at the dividing surfaces 21e and 31e. A portion of the bottom of the cylinder bore 32 on the rotating side has a fourth contouring section 35a that connects the hydraulic chamber 33 on the rotating side to the second working fluid inlet hole 34 through contouring, and a fifth contouring section 35b that contours the hydraulic chamber 33 on the rotating side. Furthermore, a sixth contour machining section 35c, which is contoured, is formed on a portion of the bottom of the cylinder bore 32 on the disc-in side toward the fifth contour machining section 35b. By connecting the fifth contour machining section 35b and the sixth contour machining section 35c, the second working fluid inlet hole 34, the hydraulic chamber 33 on the disc-out side, and the hydraulic chamber 33 on the disc-in side are connected.

[0042] Furthermore, a discharge section 37 is provided on the disc-out side of the bridging half 31c, which has a discharge hole 36 with an opening on the outer side 31f in the disc radius direction and a second working fluid inlet hole 34.

[0043] The vent hole 36 has an internal thread 36a that allows the vent screw 39 to be screwed into the opening side. The vent screw 39 has an air vent hole (not shown) on its inner circumference and an external thread 39a on its outer circumference that allows the internal thread 36a to be screwed into. A rubber vent cap 40 is attached to the front end.

[0044] Furthermore, the working part 31b of the vehicle side brake caliper half 31 includes cylinder portions 31a, 31a having cylinder bores 32, 32, an outgoing side main body 31g extending from the cylinder portion 31a on the disc outgoing side to the disc outgoing side, and an incoming side main body 31j extending from the cylinder portion 31a on the disc incoming side to the disc incoming side. A pair of third reinforcing ribs 41, 41 (disc outgoing side reinforcing ribs of this application) are provided on the outer side and inner side of the disc rotor opposite side 31h of the outgoing side main body 31g in the disc radius direction. The third reinforcing rib 41 on the outer side in the disc radius direction connects the cylinder portion 31a on the disc outgoing side and the disc outgoing side end of the outgoing side main body 31g. In addition, the third reinforcing rib 41 on the inner side in the disc radius direction connects the cylinder portion 31a on the disc outgoing side and the disc outgoing side of the third reinforcing rib 41 on the outer side in the disc radius direction. Furthermore, a third thinning portion 31i, which becomes a thin-walled portion, is formed on the opposite side 31h of the disc rotor between the third reinforcing ribs 41 and 41 through a casting hole.

[0045] Furthermore, a pair of fourth reinforcing ribs 42, 42 (the disk-entry side reinforcing ribs of this application) are provided on the outer side and inner side of the disk-entry side of the opposite side 31h of the disk-entry main body 31j in the disk radius direction. The fourth reinforcing rib 42 on the outer side in the disk radius direction connects the cylinder portion 31a on the disk-entry side and the disk-entry side end of the disk-entry main body 31j. In addition, the fourth reinforcing rib 42 on the inner side in the disk radius direction connects the cylinder portion 31a on the disk-entry side and the disk-entry side of the disk-entry rotor with the fourth reinforcing rib 42 on the outer side in the disk radius direction. Moreover, a fourth thinning portion 31k, which becomes a thin-walled portion, is formed on the opposite side 31h of the disk-entry rotor between the fourth reinforcing ribs 42, 42 through a casting hole.

[0046] Moreover, such as Figure 2 and Figure 6 As shown, the outer surface (opposite side of the disc rotor) OS4 of each third reinforcing rib 41 is formed to gradually tilt towards the disc rotor side relative to the outer surface OS5 (opposite side of the disc rotor) of the cylinder 31a. Similarly, the outer surface (opposite side of the disc rotor) OS6 of each fourth reinforcing rib 42 is also formed to gradually tilt towards the disc rotor side relative to the outer surface OS5 (opposite side of the disc rotor) of the cylinder 31a.

[0047] In addition, a mounting boss 43 is formed opposite to the mounting boss 30 of the brake caliper half 21 on the outer side of the disc radius direction of the working part 31b in the circumferential direction of the disc. The mounting boss 43 has a pin insertion hole 43a for inserting the lifting pin 4.

[0048] The brake caliper body 3 is formed by joining the brake caliper half 21 on the opposite side of the vehicle body and the brake caliper half 31 on the vehicle body side using a bridging part 3a to abut the dividing surfaces 21e and 31e together, and connecting them with connecting bolts 7 and 7. Furthermore, by connecting the brake caliper half 21 on the opposite side of the vehicle body and the brake caliper half 31 on the vehicle body side, the first working fluid inlet hole 24 and the second working fluid inlet hole 34 are connected. Consequently, the first working fluid inlet hole 24, the second working fluid inlet hole 34, the hydraulic chambers 23 of the brake caliper half 21 on the opposite side of the vehicle body side, and the hydraulic chambers 33 of the brake caliper half 31 on the vehicle body side are connected, forming a fluid passage L1. Additionally, because the connecting hole 26 is connected to the first working fluid inlet hole 24, working fluid is supplied to the fluid passage L1 through the connecting hole 26. Moreover, because the vent hole 36 is connected to the second working fluid inlet hole 34, air mixed in with the working fluid in the fluid passage L1 is discharged to the outside through the vent screw 39.

[0049] Furthermore, friction pad receiving portions 9 for accommodating friction pads 5 are formed in the outward-turning main body portions 21g and 31g and the inward-turning main body portions 21j and 31j. The disc outward-turning side wall 9a formed in the friction pad receiving portions 9 in the outward-turning main body portions 21g and 31g and the disc inward-turning side wall 9b formed in the friction pad receiving portions 9 in the inward-turning main body portions 21j and 31j become torque receiving portions that abut against the friction pads 5 during braking and receive torque. Moreover, a locking groove 9c for locking the aforementioned pad spring 6 is formed in the disc inward-turning side wall 9b.

[0050] Each friction pad 5 consists of a liner 5a that slides in contact with the side of the disc rotor 2 and a metal back plate 5b to which the liner 5a is attached. The back plate 5b has a hanging piece 5e protruding from the center of its outer side 5c in the radial direction of the disc, having a hanging pin insertion hole 5d through which the hanging pin 4 is inserted. Adjacent to the disc-out and disc-in sides of the hanging piece 5e, a pair of first pad spring abutting portions 5f, 5f, which abut against the pad spring 6, are also protruding. Furthermore, a pair of second pad spring abutting portions 5g, 5g, are protruding from the disc-out and disc-in ends of the outer side 5c in the radial direction of the disc. The hanging piece 5e, the first pad spring abutting portions 5f, 5f, and the second pad spring abutting portions 5g, 5g are arranged side-by-side in the circumferential direction of the outer side 5c in the radial direction of the disc.

[0051] The lifting pins 4 are respectively inserted into the pin insertion holes 30a and 43a of the mounting bosses 30 and 43, pass through the top opening 3b of the brake caliper body 3 and are mounted along the disc axis. They are also inserted into the lifting pin insertion holes 5d and 5d of the hanging plates 5e and 5e provided on the friction pads 5, so as to movably suspend the friction pads 5 and 5 along the disc axis in a state of being accommodated in the friction pad receiving part 9. In addition, pad springs 6 are provided throughout the back plate 5b and the lifting pins 4, pressing the friction pads 5 and 5 towards the inner side in the disc radius direction and the disc rotation side.

[0052] The pad spring 6 is formed by bending a sheet of material that has been punched into a specified shape. It has an arc-shaped pin abutment portion 6a that abuts against the outer peripheral surface of the inner side of the disc of the pin 4 in the radial direction; a first elastic portion 6c that extends from the pin abutment portion 6a to the disc-inward side via a strip-shaped first spring plate 6b and abuts against the first pad spring abutment portion 5f and the first pad spring abutment portion 5g of the disc-inward side of the friction pads 5 and 5; and a second elastic portion 6e that extends from the pin abutment portion 6a to the disc-outward side via a strip-shaped second spring plate 6d and abuts against the second pad spring abutment portion 5g of the disc-outward side of the friction pads 5 and 5.

[0053] The first elastic part 6c includes: a first pad spring abutting part 5f that abuts against the first pad spring abutting part 5f on the disc rotation inward side of the friction pad 5, and a first elastic piece 6f that springs the friction pads 5, 5 towards the inner side of the disc radius and the disc rotor rotation outward side; a first positioning piece 6g, 6g and a second positioning piece 6h, 6h that abuts against the friction pads 5, 5 and the pad spring 6 when the friction pads 5, 5 and the pad spring 6 are assembled into the brake caliper body 3, and a locking piece 6i that is locked in the locking groove 9c.

[0054] The first positioning pieces 6g, 6g and the second positioning pieces 6h, 6h are formed by cutting off a portion of the first elastic piece 6f and bending it inward in the radial direction of the disk into an arc shape. For example... Figure 8 As shown, when the friction pads 5, 5 and the pad spring 6 are assembled into the brake caliper body 3, the first positioning pieces 6g, 6g are inserted into the recesses 5h, 5h (spaces) formed between the hanging pieces 5e, 5e and the first pad spring abutment portions 5f, 5f on the disc-turning side. That is, the first positioning pieces 6g, 6g are accommodated in the recesses 5h, 5h, and their front ends abut against the disc-turning side 5i, 5i of the first pad spring abutment portions 5f, 5f. The second positioning pieces 6h, 6h abut against the outer side 5c of the back plate 5b in the disc radius direction near the second pad spring abutment portions 5g, 5g on the disc-turning side.

[0055] Furthermore, the locking piece 6i protrudes from the center of the disk axis at the disk-entry side end of the first elastic piece 6f toward the disk-entry side, and the front end 6j is inserted into the locking groove 9c. Moreover, the first elastic piece 6f is formed to be wide in the disk axis, and the end faces 6k, 6k on the opposite side of the disk rotor abut against the wall portions 3c, 3c of the top opening 3b, respectively.

[0056] The second elastic portion 6e is formed by bending the disc-out side outward in the disc radius direction into an arc shape, so that the bent portion 6m abuts against the disc-in side 5j, 5j of the second pad spring abutting portions 5g, 5g on the disc-out side. Furthermore, the second elastic portion 6e is formed to be wide in the disc axial direction, and the end faces 6n, 6n (the second suppression portion of the present invention) on the opposite side of the disc rotor abut against the wall portions 3c, 3c of the top opening portion 3b. Additionally, the wall portions 3c, 3c on the opposite side of the disc rotor of the top opening portion 3b, which abut against the end faces 6k, 6k, 6n, 6n, are each formed from a cast surface. Furthermore, the outer side 9d of the aforementioned locking groove 9c in the disc radius direction is formed further outward in the disc radius direction than the receiving groove 3e of the disc rotor 2 formed on the side of the disc rotor in the bridging portion 3a.

[0057] Regarding the assembly of the friction pads 5, 5 and the pad spring 6 toward the brake caliper body 3, as thus formed, firstly, as... Figure 8 As shown, friction pads 5 and 5 are arranged in friction pad receiving portion 9, and pad spring 6 is arranged outside the disk radius direction of friction pads 5 and 5, so that the front end 6j of locking piece 6i is locked in locking groove 9c.

[0058] At this time, the first positioning pieces 6g, 6g are inserted into the recesses 5h, 5h formed between the hanging pieces 5e, 5e and the first pad spring abutment portions 5f, 5f on the disc-inward side, and their front ends abut against the disc-outward sides 5i, 5i of the first pad spring abutment portions 5f, 5f. The second positioning pieces 6h, 6h abut against the outer sides 5c, 5c of the disc radius near the second pad spring abutment portions 5g, 5g on the disc-inward side, thus positioning the pad spring 6 relative to the friction pads 5, 5.

[0059] Next, the pin insertion holes 30a of the mounting boss 30 of the brake caliper half 21 on the opposite side of the vehicle body, the 43a of the mounting boss 43 of the brake caliper half 31 on the vehicle body side, and the pin insertion holes 5d and 5d of the hanging plates 5e and 5e provided on the friction pads 5 and 5 are inserted through the hanging pins 4, so that the friction pads 5 and 5 are movably suspended along the disc axis by the hanging pins 4. In addition, the outer peripheral surface of the hanging pin 4 in the disc radius direction abuts against and presses the pad spring 6 through the hanging pin abutment part 6a of the pad spring 6, so that the pad spring 6 is positioned in a set position. Figure 5 The standard position is shown.

[0060] Regarding the pad spring 6 positioned in the standard position, the outer circumferential surface of the inner side of the hanging pin 4 in the disc radius direction abuts against the hanging pin abutting portion 6a of the pad spring 6, and the front end 6j of the locking piece 6i is locked in the locking groove 9c. The first elastic piece 6f of the first elastic portion 6c abuts against the outer side 5k, 5k of the first pad spring abutting portion 5f, 5f on the disc-rotating side of the friction pads 5, 5 in the disc radius direction. Because the outer side 5k, 5k of the disc radius direction is formed by gradually tilting from the disc-rotating side towards the disc-rotating side towards the disc rotor side, the first pad spring abutting portion 5f, 5f springs the friction pads 5, 5 towards the inner side in the disc radius direction and the disc-rotating side. The curved portion 6m of the second elastic portion 6e abuts against the inner side 5j, 5j of the second pad spring abutting portion 5g, 5g on the disc-rotating side of the friction pads 5, 5 in the disc radius direction, springing the friction pads 5, 5 towards the inner side in the disc radius direction and the disc-rotating side. Furthermore, the end faces 6k, 6k, 6n, 6n abut against the wall portions 3c, 3c on the opposite side of the disc rotor of the top opening 3b.

[0061] Regarding the brake caliper body 3 of this embodiment, as described above, the brake caliper body 3 is provided with first reinforcing ribs 28, 28, second reinforcing ribs 29, 29, third reinforcing ribs 41, 41, and fourth reinforcing ribs 42, 42, and between each reinforcing rib, there are first thinning portions 21i, second thinning portions 21k, third thinning portions 31i, and fourth thinning portions 31k that become thin-walled portions. As a result, the brake caliper body 3 can be made as lightweight as possible to suppress the increase in weight, while improving the rigidity of the brake caliper body 3, and suppressing the cylinder portions 21a, 31a from bulging to the opposite side of the disc rotor during braking.

[0062] Furthermore, the outer surface OS1 of the first reinforcing rib 28 is formed to gradually tilt towards the disc rotor side towards the disc rotation exit side compared to the outer surface OS2 of the cylinder 21a; the outer surface OS3 of the second reinforcing rib 29 is formed to gradually tilt towards the disc rotor side towards the disc rotation entry side compared to the outer surface OS2 of the cylinder 21a; the outer surface OS4 of the third reinforcing rib 41 is formed to gradually tilt towards the disc rotor side towards the disc rotation exit side compared to the outer surface OS5 of the cylinder 31a; and the outer surface OS6 of the fourth reinforcing rib 42 is formed to gradually tilt towards the disc rotor side towards the disc rotation entry side compared to the outer surface OS5 of the cylinder 31a. Thus, it is possible to achieve weight reduction without increasing the size of the brake caliper body 3, while ensuring rigidity.

[0063] It should be noted that this invention is not limited to segmented brake caliper bodies, but can also be applied to load-bearing brake caliper bodies. Furthermore, the opposite side of the disc rotor forming the reinforcing ribs of the brake caliper body can also be formed on the same plane as the opposite side of the disc rotor in the cylinder section. Moreover, the number of pistons or the structure of the hydraulic passage is arbitrary. Additionally, the vehicle body mounting portion can be an axially mounted brake caliper body with mounting bolt insertion holes along the disc axis. Furthermore, this invention is not limited to brake caliper bodies of piston-opposed disc brakes as in this embodiment, but can also be applied to brake caliper bodies of pin-sliding disc brakes with piston-operating portions and reaction portions with reaction claws on both sides of the disc rotor.

[0064] Explanation of reference numerals in the attached figures

[0065] 1. Disc brakes for vehicles

[0066] 2. Disc rotor

[0067] 3. Brake caliper body

[0068] 3a Bridging section

[0069] 3b Top opening

[0070] 3C wall

[0071] 3e Reservoir

[0072] 4. Revocation

[0073] 5. Friction Pad

[0074] 5a Liner

[0075] 5b backplate

[0076] 5c disk radius direction outer side

[0077] 5d hanging pin insertion hole

[0078] 5e hanging plate

[0079] 5f First pad spring contact part

[0080] 5g Second pad spring abutment part

[0081] 5h concavity

[0082] 5i turn out side

[0083] 5J disc rotated to the side

[0084] 5k disk radius direction outer side

[0085] 6. Spring pads

[0086] 6a Lifting and abutment parts

[0087] 6b First spring plate

[0088] 6c First elastic part

[0089] 6d Second Spring Plate

[0090] 6e Second elastic part

[0091] 6f First elastic sheet

[0092] 6g First Positioning Tablet

[0093] 6h Second positioning plate

[0094] 6i locking clip

[0095] 6j front end

[0096] 6m bend

[0097] 6k, 6n end faces

[0098] 7 Connecting bolts

[0099] 8 pistons

[0100] 9 Friction pad receiving section

[0101] 9a Disc rotates out of the side wall

[0102] 9b plate rotates into side wall

[0103] 9c card stop groove

[0104] 21 Brake caliper half on the opposite side of the vehicle body

[0105] 21a Cylinder section

[0106] 21b Functional part

[0107] 21c Bridge half

[0108] 21d Top opening half

[0109] 21e dividing surface

[0110] 21f Turn the disc out to the side

[0111] 21g Rotation side main body

[0112] 21h Disc rotor opposite side

[0113] 21i First thinning section

[0114] 21j Transfer to the side main body

[0115] 21k Second Thinning Section

[0116] 21m disk radius direction outer side

[0117] 22 Cylinder Bore

[0118] 23 Hydraulic Chamber

[0119] 24 First working fluid inlet hole

[0120] 25a First Contour Machining Department

[0121] 25b Second contour machining section

[0122] 25c Third Contour Machining Department

[0123] 26 Connecting holes

[0124] 26a Internal thread section

[0125] 27 Body Installation Department

[0126] 27a Mounting bolt through hole

[0127] 28 First reinforcing rib

[0128] 29 Second reinforcing rib

[0129] 30 Mounting boss section

[0130] 30a Pin Insert Through Hole

[0131] 31. Side brake caliper half of the vehicle body

[0132] 31a Cylinder section

[0133] 31b Functional part

[0134] 31c Bridge half

[0135] 31d Top opening half

[0136] 31e dividing surface

[0137] 31f Outer side of disk radius

[0138] 31g Rotation side main body

[0139] 31h Disc rotor opposite side

[0140] 31i Third Thinning Section

[0141] 31j Transfer to the main body section

[0142] 31k Fourth thinning section

[0143] 32 cylinder bore

[0144] 33 Hydraulic Chamber

[0145] 34 Second working fluid inlet hole

[0146] 35a Fourth Contour Machining Department

[0147] 35b Fifth Contour Machining Department

[0148] 35c Sixth Contour Machining Department

[0149] 36. Drainage hole

[0150] 36a Internal thread section

[0151] 37. Excretory Department

[0152] 39. Release screw

[0153] 39a External thread section

[0154] 40. Vent cap

[0155] 41 Third reinforcing rib

[0156] 42 Fourth reinforcing rib

[0157] 43 Mounting boss part

[0158] 43a Pin insertion through hole

Claims

1. A brake caliper body for a vehicle disc brake, which is disposed across the outer periphery of a disc rotor, and an actuating portion having a cylinder portion for piston insertion is disposed on the side of the disc rotor, characterized in that, The functional part includes a turning-out side main body extending from the cylinder portion toward the disc turning-out side when the vehicle moves forward, and a turning-in side main body extending from the cylinder portion toward the disc turning-in side when the vehicle moves forward. A pair of disc-out side reinforcing ribs extending from the cylinder side toward the disc-out side are provided on the outer side of the disc-type rotor opposite to the disc-type rotor on the disc-out side main body. A pair of disc-entry side reinforcing ribs extending from the cylinder side toward the disc-entry side are provided on the outer side of the disc radius direction and the inner side of the disc radius direction on the opposite side of the disc rotor of the main body on the entry side. Thin-walled portions are provided on the opposite sides of the disc rotor between a pair of reinforcing ribs on the disc rotation-out side and on the opposite sides of the disc rotor between a pair of reinforcing ribs on the disc rotation-in side.

2. The brake caliper body of the disc brake for vehicles according to claim 1, characterized in that, The disc-out reinforcing rib and the disc-in reinforcing rib are continuously formed with the cylinder portion. The disc rotor-opposite side of the disc-out reinforcing rib and the disc rotor-opposite side of the disc rotor reinforcing rib are located on the same plane as the disc rotor-opposite side of the cylinder portion, or are formed on the disc rotor side closer to the disc rotor than the disc rotor-opposite side of the cylinder portion.

3. The brake caliper body of the disc brake for vehicles according to claim 1, characterized in that, The brake caliper body is formed by connecting a pair of the actuating parts located on both sides of the disc rotor using a bridging portion that spans the outer periphery of the disc rotor.

4. The brake caliper body of the disc brake for vehicles according to claim 1, characterized in that, The rotating-out side main body and the rotating-in side main body of the functional part are provided with a body mounting part, which has a bolt insertion hole in the radial direction of the disc through which the body mounting bolt is inserted.

5. The brake caliper body of the disc brake for vehicles according to claim 1, characterized in that, The functional part is provided with a body mounting part, which has a bolt insertion hole in the disc axis through which a body mounting bolt is inserted.

Images