Disc brake caliper body for vehicle

Abstract

A brake caliper body for a vehicle disc brake prevents the mounting surfaces of the connecting bolts and bleed screws from protruding outward from the brake caliper half, thereby improving miniaturization and assemblability. The caliper half (6c) on the opposite side of the vehicle body has a connecting hole (18) on the disc-out end of the bridging portion (6c), which opens toward the disc-out end face (6g) and communicates with a second actuating fluid inlet hole (16). A mounting surface (6h) for the connecting bolt (19) is formed on the disc-out end face (6g) around the opening of the connecting hole (18). A bleed hole (12) is provided on the disc-out side of the bridging portion (5c) of the vehicle body side brake caliper half (5), at its outer end in the disc radius direction, opening toward the outer end face (5g) in the disc radius direction and communicating with a first actuating fluid inlet hole (11). A mounting surface (5h) for the bleed screw (13) is formed on the outer end face (5g) in the disc radius direction around the opening of the bleed hole (12).

Description

Technical Field

[0001] The present invention relates to a brake caliper body for a vehicle disc brake mounted on a four-wheeled car or motorcycle, and more specifically, to a split type brake caliper body formed by connecting a pair of brake caliper halves disposed on both sides of a disc rotor with a bridging portion. Background Technology

[0002] Conventionally, a pair of brake caliper halves, each having a working portion with a cylinder bore and a bridging portion half spanning the outer periphery of a disc rotor, are used as brake caliper bodies for engaging the bridging portion halves. A connecting boss portion with a connecting hole for introducing operating fluid and a venting boss portion with a venting hole are provided on the outer side of one bridging portion half in the disc radius direction (for example, see Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 4510217 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, in the brake caliper body of the aforementioned Patent Document 1, the connecting boss and the bleed boss protrude from the brake caliper half. The connecting boss has a connecting hole through which a connecting bolt passes, and a mounting surface for the connecting bolt is formed on the outer periphery of the opening of the connecting hole. The bleed boss has a bleed hole through which a bleed screw passes, and a mounting surface for the bleed screw is formed on the outer periphery of the opening of the bleed hole. Therefore, the mounting surfaces for the connecting bolt and the bleed screw protrude outwards from the brake caliper half, resulting in a larger brake caliper body. Consequently, the front ends of the connecting bolt and the bleed screw protrude significantly outwards from the brake caliper half. Therefore, when assembling the brake caliper body onto the vehicle body, the connecting bolt or the bleed screw may become an obstacle.

[0008] Therefore, the purpose of this invention is to provide a brake caliper body for a vehicle disc brake that prevents the mounting surface of the connecting bolt or bleed screw from protruding outward from the brake caliper half, thereby achieving miniaturization and improved assemblability.

[0009] Technical solutions for solving the problem

[0010] To achieve the above objectives, the brake caliper body of the vehicle disc brake of the present invention engages a pair of brake caliper halves with a bridging half, and has a connecting hole for introducing operating fluid, an operating fluid inlet hole that connects the connecting hole to a cylinder bore and introduces the operating fluid into the cylinder bore, and a vent hole for venting gas mixed in the operating fluid. The pair of brake caliper halves are disposed on both sides of a disc rotor, each having an actuating part and a bridging half that spans the outer periphery of the disc rotor. The actuating part has the cylinder bore. The connecting hole is characterized by opening to the disc rotation exit side of either bridging half when the vehicle is moving forward, and a mounting surface for a connecting bolt installed in the connecting hole is formed on the outer periphery of the opening of the connecting hole. The vent hole is characterized by opening to the disc rotation exit side of either bridging half when the vehicle is moving forward, and a mounting surface for a vent screw installed in the vent hole is formed on the outer periphery of the opening of the vent hole.

[0011] In addition, preferably, the connecting hole opens toward the disc-rotated end face of the bridging portion half, and the vent hole opens toward the outer end face of the disc-rotated side of the bridging portion half in the direction of the disc radius.

[0012] In addition, preferably, the vent hole opens toward the disc-rotated end face of the bridging portion half, and the connecting hole opens toward the outer end face of the disc-rotated side of the bridging portion half in the direction of the disc radius.

[0013] In addition, preferably, the mating surfaces of the pair of brake caliper halves are formed on the side of the vehicle body that are closer to the vehicle body than the width direction of the disc rotor when the brake caliper body is assembled to the vehicle body. The connecting hole is formed on the disc-out side of the brake caliper halves located on the opposite side of the vehicle body. An anti-rotation part is provided on the outer periphery of the mounting surface of the connecting bolt to prevent the hollow hose connector at the end of the brake hose connected to the connecting hole from rotating.

[0014] Alternatively, it is preferable that the bottom side of the cylinder bore has a contouring section that contours the bottom side and communicates with the actuating fluid inlet hole.

[0015] Additionally, a radially mounted body mounting part with mounting bolt through holes in the disc radius direction can be provided on the brake caliper half located on the opposite side of the vehicle body.

[0016] Invention Effects

[0017] According to the present invention, the brake caliper body of the vehicle disc brake has a connecting hole that faces either of the bridging halves and opens to the side where the disc rotates out when the vehicle is moving. A mounting surface for a connecting bolt is formed on the outer periphery of the opening of the connecting hole. Similarly, the bleed hole has a bleed hole that faces either of the bridging halves and opens to the side where the disc rotates out when the vehicle is moving. A mounting surface for a bleed screw is formed on the outer periphery of the opening of the bleed hole. This allows for the provision of connecting holes or bleed holes without forming connecting bosses and bleed bosses on the brake caliper halves, and prevents the mounting surfaces of the connecting bolts or bleed screws from protruding outwards from the brake caliper halves. This enables miniaturization of the brake caliper body and prevents the front ends of the connecting bolts and bleed screws from protruding excessively outwards from the brake caliper body, thus improving assemblability.

[0018] Furthermore, the design allows the connecting hole to open onto the disc-out end face of either bridge half, and the bleed hole to open onto the outer end face of the disc-out side of either bridge half in the radial direction. Alternatively, the bleed hole can open onto the disc-out end face of either bridge half, and the connecting hole can open onto the outer end face of the disc-out side of either bridge half in the radial direction. This design reduces interference between tools and connecting bolts or bleed screws when assembling the brake caliper onto the vehicle body, improving assemblability. Additionally, when assembling the brake caliper onto the vehicle body with the connecting hole facing upwards, the brake hose length can be shortened compared to the conventional structure where the connecting hole is located in the center of the bridge half.

[0019] Furthermore, the mating surface where a pair of brake caliper halves are joined is formed on the side of the vehicle body that is located further from the center of the disc rotor in the width direction when the brake caliper body is assembled onto the vehicle body. A connecting hole is formed on the disc-rotor side of the brake caliper halves located on the opposite side of the vehicle body. An anti-rotation part is provided on the outer periphery of the mounting surface of the connecting bolt to prevent the rotation of the hollow hose connector at the end of the brake hose connected to the connecting hole. Thus, the space required to form the anti-rotation part can be ensured on the disc-rotor side of the brake caliper halves located on the opposite side of the vehicle body, the wall thickness of the anti-rotation part can be ensured, and the formability and the degree of freedom of the shape of the anti-rotation part can be improved.

[0020] Furthermore, by having a contouring section on the bottom side of the cylinder bore that performs contouring on the bottom side and communicates with the actuating fluid inlet hole, it is possible to easily and effectively communicate the hydraulic chamber formed on the bottom side of the cylinder bore with the actuating fluid inlet hole.

[0021] In addition, even radially mounted brake calipers can be miniaturized, improving assembleability. 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 with disc brakes.

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

[0025] Figure 4 This is a side view of the same vehicle with disc brakes.

[0026] Figure 5 yes Figure 4 VV cross-section diagram.

[0027] Figure 6 yes Figure 1 Section VI-VI.

[0028] Figure 7 yes Figure 2 Section VII-VII.

[0029] Figure 8 This is a front view of the main part showing the connection bolts and hollow hose connector installed in the connection hole.

[0030] Figure 9 This is a side view showing the connection bolts and hollow hose connector installed in the connection hole.

[0031] Figure 10 yes Figure 8 XX cross-sectional view.

[0032] Figure 11 This is a front view of a brake caliper body according to an embodiment of the present invention.

[0033] Figure 12 This is a rear view of the brake caliper half on the opposite side of the vehicle body.

[0034] Figure 13 yes Figure 11 Section XIII-XIII.

[0035] Figure 14 This is a front view of the brake caliper on the side of the vehicle body.

[0036] Figure 15 This is a rear view of the brake caliper half on the side of the vehicle body.

[0037] Figure 16 yes Figure 15 XVI-XVI cross-sectional view. Detailed Implementation

[0038] Figures 1 to 16This is a diagram showing an embodiment of the brake caliper of the disc brake 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 mentioned below refer to the direction when the vehicle is moving forward.

[0039] The vehicle disc brake 1 consists of a disc rotor 2 that rotates integrally with a wheel (not shown) in the direction of arrow A, a brake caliper 3 mounted on one side of the disc rotor 2 on the vehicle body, and a pair of friction pads 4, 4 disposed opposite each other inside the brake caliper 3 with the disc rotor 2 in between.

[0040] The brake caliper body 3 is formed by integrally connecting the vehicle side brake caliper half 5 (the brake caliper half of the present invention) and the vehicle side brake caliper half 6 (the brake caliper half of the present invention) which are divided by the bridge portion 3a spanning the outer periphery of the disc rotor 2 by two connecting bolts 7, 7.

[0041] The vehicle-side brake caliper half 5 has: an actuating part 5b having cylinder bores 5a, 5a arranged side-by-side in the circumferential direction of the disc; and a bridging half 5c that constitutes approximately half of the bridging half 3a. The vehicle-side brake caliper half 6, similar to the vehicle-side brake caliper half 5, also has: an actuating part 6b having cylinder bores 6a, 6a arranged side-by-side in the circumferential direction of the disc; and a bridging half 6c that constitutes approximately half of the bridging half 3a. Furthermore, the length of the bridging half 6c in the disc axis direction of the vehicle-side brake caliper half 6 is longer than the length of the bridging half 5c in the disc axis direction of the vehicle-side brake caliper half 5. When the brake caliper body 3, formed by joining the bridging half 5c and 6c together, is assembled onto the vehicle body, the mating surface 8 is formed further towards the vehicle side than the width direction center CL1 of the disc rotor 2.

[0042] The brake caliper half 5 on the vehicle body side has pistons 9 and 9 inserted into cylinder bores 5a and 5a. Hydraulic chambers 10 and 10 for introducing actuating fluid are divided between the bottom sides of the cylinder bores 5a and 5a and the pistons 9 and 9. Furthermore, a first actuating fluid inlet hole 11 is provided from the dividing surface of the mating surface 8 on the rotating side of the bridging half 5c toward the hydraulic chamber 10 of the rotating side cylinder bore 5a. A portion of the bottom of the rotating side cylinder bore 5a has: a first contouring section 5d, which connects the rotating side hydraulic chamber 10 and the first actuating fluid inlet hole 11 through contouring; and a second contouring section 5e, which performs contouring toward the rotating side hydraulic chamber 10. Furthermore, a third contour processing section 5f is formed at a portion of the bottom of the cylinder bore 5a on the disc-in side, which is contoured toward the second contour processing section 5e. By connecting the second contour section 5e and the third contour processing section 5f, the first actuating fluid inlet hole 11, the hydraulic chamber 10 on the disc-out side, and the hydraulic chamber 10 on the disc-in side are connected.

[0043] Additionally, a vent hole 12 is provided on the disc-rotating side of the bridging half 5c, at the outer end in the disc radius direction. This vent hole 12 opens on the outer end face 5g in the disc radius direction and communicates with the first actuating fluid inlet hole 11. The vent hole 12 has an internal thread portion 12a on the opening side for screwing in the vent screw 13, and a mounting surface 5h for the vent screw 13 is formed on the outer end face 5g in the disc radius direction on the outer periphery of the opening. The vent screw 13 has a gas discharge hole on its inner periphery, an external thread portion 13a on its outer periphery for screwing in the internal thread portion 12a, and a rubber vent cap 13b covering its front end head.

[0044] Similar to the brake caliper half 5 on the opposite side of the vehicle body, the brake caliper half 6 on the opposite side of the vehicle body has pistons 14 and 14 inserted into cylinder bores 6a and 6a. Hydraulic chambers 15 and 15 are divided between the bottom side of the cylinder bores 6a and 6a and the pistons 14 and 14. In addition, a second actuating fluid inlet hole 16 is provided from the dividing surface of the mating surface 8 on the disc-out side of the bridging half 6c toward the hydraulic chamber 15 on the disc-out side. The first actuating fluid inlet hole 11 and the second actuating fluid inlet hole 16 are connected at the mating surface 8, and a sealing member 17 is clamped on the outer periphery of the connecting part. A portion of the bottom of the cylinder bore 6a on the disc-out side has: a fourth contouring part 6d, which connects the hydraulic chamber 15 on the disc-out side and the second actuating fluid inlet hole 16 through contouring; and a fifth contouring part 6e, which is contoured toward the hydraulic chamber 15 on the disc-in side. Furthermore, a sixth contour machining section 6f is formed at a portion of the bottom of the cylinder bore 6a on the disc-in side, which performs contour machining toward the fifth contour section 6e. By connecting the fifth contour machining section 6e and the sixth contour machining section 6f, the second actuating fluid inlet hole 16, the hydraulic chamber 15 on the disc-out side, and the hydraulic chamber 15 on the disc-in side are connected.

[0045] Additionally, a connecting hole 18 is provided at the disc-out end of the bridging half 6c, opening on the disc-out end face 6g and communicating with the second actuating fluid inlet hole 16. The connecting hole 18 has an internal thread 18a on the opening side for tightening the connecting bolt 19, and a mounting surface 6h for the connecting bolt 19 is formed on the disc-out end face 6g on the outer periphery of the opening. A hollow hose connector 21, fixed to the end of the brake hose 20, is mounted on the connecting bolt 19, and an anti-rotation portion 6i of the hollow hose connector 21 is formed on the outer periphery of the mounting surface 6h. An anti-rotation portion 6i protrudes from the outer peripheral side of the mounting surface 6h and has a wall portion 6j for protecting the connection between the connecting bolt 19 and the hollow hose connector 21, and a locking portion 6k for preventing the hollow hose connector 21 from rotating by cutting a portion of the wall portion 6j. By clamping the hollow hose connector 21 in the locking portion 6k, the hollow hose connector 21 does not rotate when the connecting bolt 19 is screwed into the connecting hole 18. The connecting bolt 19 has an external thread portion 19a that engages with the internal thread portion 18a and a hexagonal head 19b. A fluid passage hole 19c is formed inside the external thread portion 19a. The brake hose 20 communicates with the connecting hole 18 via the connecting bolt 19.

[0046] In addition, radial mounting parts 6n and 6n with mounting bolt insertion holes 6m and 6m in the direction of the disc radius are formed on the disc-in side and disc-out side of the brake caliper half 6 on the opposite side of the vehicle body. The brake caliper body 3 is mounted on the vehicle body by screwing the mounting bolts that pass through the mounting bolt insertion holes 6m and 6m into the brake caliper mounting parts provided on the side of the vehicle body.

[0047] The brake caliper body 3 connects the vehicle-side brake caliper half 5 and the opposite-side brake caliper half 6 via a bridging part 3a and is connected by connecting bolts 7 and 7. This connects the first operating fluid inlet hole 11 and the second operating fluid inlet hole 16, and consequently, the hydraulic chambers 10 and 10 of the vehicle-side brake caliper half 5 and the hydraulic chambers 15 and 15 of the opposite-side brake caliper half 6 are also connected. Furthermore, since the connecting hole 18 connects to the second operating fluid inlet hole 16, operating fluid is supplied to the hydraulic chambers 10, 10, 15, 15 via the connecting bolt 19 and the first and second operating fluid inlet holes 11 and 17. Additionally, since the vent hole 12 connects to the first operating fluid inlet hole 11, any gas mixed in with the operating fluid introduced into the first operating fluid inlet hole 11, the second operating fluid inlet hole 16, and the hydraulic chambers 10, 10, 15, 15 is discharged to the outside via the vent screw 13.

[0048] Each friction pad 4 consists of a liner 4a that slides in contact with the side of the disc rotor 2 and a metal back plate 4b to which the liner 4a is attached. A suspension plate 4c extends from the upper center of the back plate 4b, through which a hanger 22 is inserted. The hanger 22 is mounted along the disc axis direction at the working parts 5b and 6b of both sides through the canopy opening 3b formed in the bridge part 3a of the brake caliper body 3. It can move along the disc axis direction between the torque receiving parts 5i, 5i, 6p, 6p respectively located on the disc-side and disc-out sides of the brake caliper half 5 on the vehicle side and the brake caliper half 6 on the opposite side of the vehicle body. In addition, a pad spring 23 is provided throughout the back plate 4b, the bridge part 3a and the hanger 22 to press the friction pads 4, 4 against the disc-out side and the inner side in the disc radius direction.

[0049] By forming the brake caliper body 3 of this embodiment as described above, a connecting hole 18 or a vent hole 12 can be provided instead of a connecting boss or a vent boss on the vehicle-side brake caliper half 5 or the vehicle-side brake caliper half 6. This prevents the mounting surfaces 5h and 6h of the connecting bolt 19 or the vent screw 13 from protruding outward from the vehicle-side brake caliper half 5 or the vehicle-side brake caliper half 6. As a result, the brake caliper body 3 can be miniaturized, and the front ends of the connecting bolt 19 and the vent screw 13 can be prevented from protruding excessively outward from the brake caliper body 3, thus improving assemblability.

[0050] Furthermore, the length of the bridging portion half 6c of the brake caliper half 6 on the opposite side of the vehicle body in the disc axis direction is longer than the length of the bridging portion half 5c of the brake caliper half 5 on the vehicle body side in the disc axis direction. A connecting hole 18 opening to the disc-out end face 6g is provided at the disc-out end of the bridging portion half 6c of the brake caliper half 6 on the opposite side of the vehicle body. An anti-rotation portion 6i of the hollow hose connector 21 is formed on the outer periphery of the mounting surface 6h, thus ensuring the space required to form the anti-rotation portion 6i. As a result, the wall thickness of the anti-rotation portion 6i can be ensured, and the formability and the degree of freedom of the shape of the anti-rotation portion 6i can be improved. Moreover, since the vent hole 12 is machined on the outer end face 5g of the bridging portion half 5c on the disc-out side of the brake caliper half 5 on the vehicle body side in the disc radius direction, interference between the tool and the connecting bolt 19 or the vent screw 13 can be suppressed when assembling the brake caliper body 3 onto the vehicle body, thereby improving assemblability.

[0051] Furthermore, when the brake caliper 3 is installed on the vehicle body with the connection hole 18 facing upwards, the length of the brake hose 20 can be shortened compared to the conventional structure where the connection hole is located in the center of the bridge section.

[0052] Furthermore, by contouring a portion of the bottom of cylinder bores 5a, 5a to connect with the first actuating fluid inlet hole 11, and by contouring a portion of the bottom of cylinder bores 6a, 6a to connect with the second actuating fluid inlet hole 16, it is possible to easily and effectively connect hydraulic chambers 10, 10, the first actuating fluid inlet hole 11, hydraulic chambers 15, 15, and the second actuating fluid inlet hole 16. Moreover, by contouring a portion of the bottom of adjacent cylinder bores 5a, 5a and adjacent cylinder bores 6a, 6a to connect them, it is possible to easily and effectively connect adjacent cylinder bores 5a, 5a and adjacent cylinder bores 6a, 6a, thereby improving machinability. Furthermore, since the contouring is performed only on a portion of the bottom of each cylinder bore 5a, 6a, the amount of machining required is reduced.

[0053] Furthermore, the present invention is not limited to the embodiments described above. A connecting hole may be formed in the bridging portion half of the brake caliper half on the vehicle side, and a vent hole may be formed in the bridging portion half of the brake caliper half on the opposite side of the vehicle. Additionally, the mating surface that joins the brake caliper half on the vehicle side and the brake caliper half on the opposite side of the vehicle can be located at the center of the disc rotor in the width direction when the brake caliper body is assembled onto the vehicle body. Furthermore, the connection between the cylinder bore and the actuating fluid inlet hole, and the connection between adjacent cylinder bores, is not limited to being connected by contour machining; it can also be connected by flange machining or by casting. Furthermore, the vehicle mounting portion formed on the brake caliper half on the opposite outer side of the vehicle can be an axially mounted vehicle mounting portion with mounting bolt through holes in the disc shaft direction. Additionally, the number of cylinder bores formed on each brake caliper half is arbitrary.

[0054] Marker description

[0055] 1: Disc brakes for vehicles

[0056] 2: Disc rotor

[0057] 3: Brake caliper body

[0058] 3a: Bridging section

[0059] 3b: Ceiling opening

[0060] 4: Friction pad

[0061] 4a: Lining

[0062] 4b: Back panel

[0063] 5: Side brake caliper half of the vehicle body

[0064] 5a: Cylinder bore

[0065] 5b: Functional part

[0066] 5c: Bridge half-body

[0067] 5d: First contour machining department

[0068] 5e: Second contour machining section

[0069] 5f: Third contour machining department

[0070] 5g: Outer end face in the direction of disk radius

[0071] 5h: Install the seat surface

[0072] 5i: Torque Bearing Section

[0073] 6: Brake caliper half on the opposite side of the vehicle body

[0074] 6a: Cylinder bore

[0075] 6b: Functional part

[0076] 6c: Bridge half

[0077] 6d: Fourth Contour Machining Department

[0078] 6e: Fifth Contour Machining Department

[0079] 6f: Sixth Contour Machining Department

[0080] 6g: Rotate the disc to the side end face

[0081] 6h: Mounting surface

[0082] 6i: Anti-rotation part

[0083] 6j: Wall

[0084] 6k: Card-connecting part

[0085] 6m: Through hole for mounting bolts

[0086] 6n: Body mounting section

[0087] 6p: Torque-bearing section

[0088] 7: Connecting bolts

[0089] 8: Joint surface

[0090] 9: Piston

[0091] 10: Hydraulic Chamber

[0092] 11: First action fluid inlet hole

[0093] 12: Vent hole

[0094] 12a: Internal thread section

[0095] 13: Air bleed screw

[0096] 13a: External thread section

[0097] 13b: Deflator cap

[0098] 14: Piston

[0099] 15: Hydraulic Chamber

[0100] 16: Second action fluid inlet hole

[0101] 17: Sealing components

[0102] 18: Connecting hole

[0103] 18a: Internal thread section

[0104] 19: Connecting bolts

[0105] 19a: External thread section

[0106] 19b: Hexagonal head

[0107] 19c: Liquid passage

[0108] 20: Brake hose

[0109] 21: Hollow hose connector

[0110] 22: Revocation

[0111] 23: Leaf spring

Claims

1. A brake caliper body for a vehicle disc brake, wherein a pair of brake caliper halves are joined by abutting bridging portions, and the caliper body has a connecting hole for introducing operating fluid, an operating fluid inlet hole communicating with a cylinder bore and introducing operating fluid into the cylinder bore, and a vent hole for venting gas mixed in the operating fluid, the pair of brake caliper halves being disposed on both sides of a disc rotor, each having an actuating portion and a bridging portion halves spanning the outer periphery of the disc rotor, the actuating portion having the cylinder bore, characterized in that... The connecting hole is provided for the turnout side opening when the vehicle moves forward in either of the bridge half, and a mounting surface for the connecting bolt to be installed in the connecting hole is formed on the outer periphery of the opening of the connecting hole. The vent hole is provided with a rotating side opening when the vehicle moves forward towards either of the other half of the bridging section, and a mounting surface for the vent screw to be installed in the vent hole is formed on the outer periphery of the opening of the vent hole. The connecting hole opens toward the disc-rotated end face of the bridging half, and the vent hole opens toward the outer end face of the disc-rotated side of the bridging half in the direction of the disc radius.

2. A brake caliper body for a vehicle disc brake, wherein a pair of brake caliper halves are joined by abutting bridging portions, and the caliper body has a connecting hole for introducing operating fluid, an operating fluid inlet hole communicating with a cylinder bore and introducing operating fluid into the cylinder bore, and a vent hole for venting gas mixed in the operating fluid, wherein the pair of brake caliper halves are disposed on both sides of a disc rotor, each having an actuating portion and a bridging portion halves spanning the outer periphery of the disc rotor, the actuating portion having the cylinder bore, characterized in that... The connecting hole is provided for the turnout side opening when the vehicle moves forward in either of the bridge half, and a mounting surface for the connecting bolt to be installed in the connecting hole is formed on the outer periphery of the opening of the connecting hole. The vent hole is provided with a rotating side opening when the vehicle moves forward towards either of the other half of the bridging section, and a mounting surface for the vent screw to be installed in the vent hole is formed on the outer periphery of the opening of the vent hole. The vent hole opens toward the disc-rotated end face of the bridging half, and the connecting hole opens toward the outer end face of the disc-rotated side of the bridging half in the direction of the disc radius.

3. The brake caliper body of the disc brake for vehicles as described in claim 1 or 2, characterized in that, When the brake caliper body is installed on the vehicle body, the mating surfaces of the pair of brake caliper halves are formed on the side of the vehicle body that are wider than the disc rotor. The connecting hole is formed on the disc-out side of the brake caliper halves located on the opposite side of the vehicle body. An anti-rotation part is provided on the outer periphery of the mounting seat surface of the connecting bolt to prevent the hollow hose connector at the end of the brake hose connected to the connecting hole from rotating.

4. The brake caliper body of the disc brake for vehicles as described in claim 1 or 2, characterized in that, The bottom side of the cylinder bore has a contouring section that performs contouring on the bottom side and communicates with the actuating fluid inlet hole.

5. The brake caliper body of a vehicle disc brake as described in claim 1 or 2, characterized in that, The brake caliper half, located on the opposite side of the vehicle body, is provided with a radially mounted body mounting part having mounting bolt through holes in the direction of the disc radius.

6. A brake caliper body for a vehicle disc brake, wherein a pair of brake caliper halves are joined by abutting bridging portions, and the brake caliper body has a connecting hole for introducing operating fluid, an operating fluid inlet hole communicating with a cylinder bore and introducing operating fluid into the cylinder bore, and a vent hole for venting gas mixed in the operating fluid, wherein the pair of brake caliper halves are disposed on both sides of a disc rotor, each having an actuating portion and a bridging portion halves spanning the outer periphery of the disc rotor, the actuating portion having the cylinder bore, characterized in that... The connecting hole is provided for the turnout side opening when the vehicle moves forward in either of the bridge half, and a mounting surface for the connecting bolt to be installed in the connecting hole is formed on the outer periphery of the opening of the connecting hole. The vent hole is provided with a rotating side opening when the vehicle moves forward towards either of the other half of the bridging section, and a mounting surface for the vent screw to be installed in the vent hole is formed on the outer periphery of the opening of the vent hole. When the brake caliper body is installed on the vehicle body, the mating surfaces of the pair of brake caliper halves are formed on the side of the vehicle body that are wider than the disc rotor. The connecting hole is formed on the disc-out side of the brake caliper halves located on the opposite side of the vehicle body. An anti-rotation part is provided on the outer periphery of the mounting seat surface of the connecting bolt to prevent the hollow hose connector at the end of the brake hose connected to the connecting hole from rotating.

7. The brake caliper body of the disc brake for vehicles as described in claim 6, characterized in that, The bottom side of the cylinder bore has a contouring section that performs contouring on the bottom side and communicates with the actuating fluid inlet hole.

8. The brake caliper body of the disc brake for vehicles as described in claim 6, characterized in that, The brake caliper half, located on the opposite side of the vehicle body, is provided with a radially mounted body mounting part having mounting bolt through holes in the direction of the disc radius.

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