GB2026626A - Disc Brakes - Google Patents

Disc Brakes Download PDF

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Publication number
GB2026626A
GB2026626A GB7827428A GB7827428A GB2026626A GB 2026626 A GB2026626 A GB 2026626A GB 7827428 A GB7827428 A GB 7827428A GB 7827428 A GB7827428 A GB 7827428A GB 2026626 A GB2026626 A GB 2026626A
Authority
GB
United Kingdom
Prior art keywords
boot
caliper
pin
disc brake
protecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7827428A
Other versions
GB2026626B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lucas Industries Ltd filed Critical Lucas Industries Ltd
Priority to GB7827428A priority Critical patent/GB2026626B/en
Priority to JP8473779U priority patent/JPS6316903Y2/ja
Publication of GB2026626A publication Critical patent/GB2026626A/en
Application granted granted Critical
Publication of GB2026626B publication Critical patent/GB2026626B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
    • F16D55/227—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing by two or more pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
    • F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
    • F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
    • F16D55/2265—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes the axial movement being guided by one or more pins engaging bores in the brake support or the brake housing
    • F16D55/22655—Constructional details of guide pins

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
  • Sealing Devices (AREA)

Abstract

A disc brake comprises a stationary torque member (1) which is in use fixed to the vehicle and a movable caliper member (2A, 2B) which is slidably mounted on pins (6, 7) attached to the torque member and extending into respective bores (4, 5) in the caliper member. Secured to the pins (6, 7) are respective rubber boots (9) which seal the openings of the bores (4, 5). To protect the boots (9) against damage from hot particles from the brake pads, each boot (9) is protected by a cylindrical member (10) which surrounds the boot and shrouds it at all positions of the caliper member. <IMAGE>

Description

SPECIFICATION Disc Brakes This invention relates to disc brakes for vehicles.
In one form of known disc brake, a caliper has a stationary part, usually called a torque member, which is adapted to be attached to the vehicle, and a movable part, usually called a caliper member, which is mounted for sliding movement relative to the torque member. The caliper member may slide on any suitable slide means, for example on pins secured to the torque member.
In such forms of disc brake, it is essential to protect the relatively sliding surfaces from the ingress of dirt and moisture and it has previously been proposed to provide boots of flexible material which prevent dirt from entering between the sliding surfaces and which can accommodate the relative sliding movement of the members.
Whilst the boots provide an effective seal, hot particles which in use come off the brake pads can damage the boots, severly limiting the life and effectiveness of the boots.
In accordance with the present invention, there is provided a disc brake for a vehicle, comprising two parts which are slidable relative to each other, a boot connected between the two parts, and protecting member which surrounds the boot and shrouds the boot at all relative positions of said sliding surfaces.
Thus, the boot is at all times protected from hot particles thrown from the pad. Any such particles merely hit the protecting member which ensures that they do not come in contact with and damage the boot.
Preferably, the protecting member locates the boot relative to one of the slidable members.
One of the slidable parts comprise a stationary member adapted to be fixed to the vehicle and the other part comprises a caliper member, the caliper member preferably being supported on a pin which provides one of the sliding surfaces.
The pin may be secured to the stationary member and protrude into a bore in the caliper member, the boot sealing the entrance to the bore and being connected between the pin and the caliper member at the periphery of the bore.
A disc brake in accordance with the invention for a vehicle will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is an end elevational view of the disc brake, and Figure 2 is a side view partly in section taken along the line Y-Y of Figure 1.
The disc brake comprises a stationary torque member 1 which is in use fixed to the vehicle and a movable caliper member 2 which is formed in two parts 2A, 2B interconnected by bolts 3, the two parts being arranged one on each side of the torque member 1 and carrying respective brake pads.
Each part 2A, 28 of the caliper member has two spaced-apart bores 4,5 which receive respective pairs of pins 6, 7 secured to the torque member 1, the pins 6 supporting the part 2A and the pins 7 supporting the part 28 for sliding movement. Rubber O-rings 8 surround each pin 6, 7 and provide a sliding surface for the surface of the corresponding bore 4, 5, the O-rings permitting a degree of relative transverse movement between the torque member 1 and the caliper member 2.
Secured to each pin 6, 7 is one end of a flexible rubber boot 9 which seals the opening of the bore 4, 5 and prevents the ingress of dirt and moisture into the space between the pin 6, 7 and the bore 4,5. The other end of the boot is attached to the caliper member 2 at the periphery of the bore by an annular metal protecting member 10. The member 10 is co-axial with the pin and of such a length that it shrouds the boot 9 in all relative positions of the caliper parts and the corresponding pins.
As an alternative to the above-described brake, the pins may be secured to the caliper member 2 and extend into bores in the torque member 1.
The above-described protecting members both prevent damage to the boots and retain them in position and provide a simple and cheap means of protecting the boots against hot particles which are produced from the pads. Such particles cannot contact the boots but land on the protecting members which conduct heat away before damage can be caused to the boots.
Claims
1. A disc brake for a vehicle, comprising two parts which are slidable relative to each other, a boot connected between the two parts, and a protecting member which surrounds the boot and shrouds the boot at all relative positions of said sliding parts.
2. A disc brake according to claim 1, wherein the protecting member locates the boot relative to one of the relatively slidable members.
3. A disc brake according to claim 1 or 2, wherein one of the relatively slidable parts is a stationary member adapted to be fixed to the vehicle and the other part is a caliper member which is supported by a pin extending between the members.
4. A disc brake according to claim 3, wherein the pin is secured to the stationary member and protrudes into a bore in the caliper member, the boot sealing the entrance to the bore and being connected between the pin and the caliper member at the periphery of the bore.
5. A disc brake according to claim 3 or 4, wherein the protecting member is cylindrical and surrounds the pin, the boot normally being located between the pin and the protecting member.
6. A disc brake according to claim 5, wherein the protecting member is co-axial with the pin.
7. A disc brake according to any of claims 1 to
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Disc Brakes This invention relates to disc brakes for vehicles. In one form of known disc brake, a caliper has a stationary part, usually called a torque member, which is adapted to be attached to the vehicle, and a movable part, usually called a caliper member, which is mounted for sliding movement relative to the torque member. The caliper member may slide on any suitable slide means, for example on pins secured to the torque member. In such forms of disc brake, it is essential to protect the relatively sliding surfaces from the ingress of dirt and moisture and it has previously been proposed to provide boots of flexible material which prevent dirt from entering between the sliding surfaces and which can accommodate the relative sliding movement of the members. Whilst the boots provide an effective seal, hot particles which in use come off the brake pads can damage the boots, severly limiting the life and effectiveness of the boots. In accordance with the present invention, there is provided a disc brake for a vehicle, comprising two parts which are slidable relative to each other, a boot connected between the two parts, and protecting member which surrounds the boot and shrouds the boot at all relative positions of said sliding surfaces. Thus, the boot is at all times protected from hot particles thrown from the pad. Any such particles merely hit the protecting member which ensures that they do not come in contact with and damage the boot. Preferably, the protecting member locates the boot relative to one of the slidable members. One of the slidable parts comprise a stationary member adapted to be fixed to the vehicle and the other part comprises a caliper member, the caliper member preferably being supported on a pin which provides one of the sliding surfaces. The pin may be secured to the stationary member and protrude into a bore in the caliper member, the boot sealing the entrance to the bore and being connected between the pin and the caliper member at the periphery of the bore. A disc brake in accordance with the invention for a vehicle will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is an end elevational view of the disc brake, and Figure 2 is a side view partly in section taken along the line Y-Y of Figure 1. The disc brake comprises a stationary torque member 1 which is in use fixed to the vehicle and a movable caliper member 2 which is formed in two parts 2A, 2B interconnected by bolts 3, the two parts being arranged one on each side of the torque member 1 and carrying respective brake pads. Each part 2A, 28 of the caliper member has two spaced-apart bores 4,5 which receive respective pairs of pins 6, 7 secured to the torque member 1, the pins 6 supporting the part 2A and the pins 7 supporting the part 28 for sliding movement. Rubber O-rings 8 surround each pin 6, 7 and provide a sliding surface for the surface of the corresponding bore 4, 5, the O-rings permitting a degree of relative transverse movement between the torque member 1 and the caliper member 2. Secured to each pin 6, 7 is one end of a flexible rubber boot 9 which seals the opening of the bore 4, 5 and prevents the ingress of dirt and moisture into the space between the pin 6, 7 and the bore 4,5. The other end of the boot is attached to the caliper member 2 at the periphery of the bore by an annular metal protecting member 10. The member 10 is co-axial with the pin and of such a length that it shrouds the boot 9 in all relative positions of the caliper parts and the corresponding pins. As an alternative to the above-described brake, the pins may be secured to the caliper member 2 and extend into bores in the torque member 1. The above-described protecting members both prevent damage to the boots and retain them in position and provide a simple and cheap means of protecting the boots against hot particles which are produced from the pads. Such particles cannot contact the boots but land on the protecting members which conduct heat away before damage can be caused to the boots. Claims
1. A disc brake for a vehicle, comprising two parts which are slidable relative to each other, a boot connected between the two parts, and a protecting member which surrounds the boot and shrouds the boot at all relative positions of said sliding parts.
2. A disc brake according to claim 1, wherein the protecting member locates the boot relative to one of the relatively slidable members.
3. A disc brake according to claim 1 or 2, wherein one of the relatively slidable parts is a stationary member adapted to be fixed to the vehicle and the other part is a caliper member which is supported by a pin extending between the members.
4. A disc brake according to claim 3, wherein the pin is secured to the stationary member and protrudes into a bore in the caliper member, the boot sealing the entrance to the bore and being connected between the pin and the caliper member at the periphery of the bore.
5. A disc brake according to claim 3 or 4, wherein the protecting member is cylindrical and surrounds the pin, the boot normally being located between the pin and the protecting member.
6. A disc brake according to claim 5, wherein the protecting member is co-axial with the pin.
7. A disc brake according to any of claims 1 to 6, wherein the protecting member is of heatconductingmaterial.
8. A disc brake for a vehicle, constructed and arranged substantially as herein described with reference to the accompanying drawings.
GB7827428A 1978-06-20 1978-06-20 Disc brakes Expired GB2026626B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB7827428A GB2026626B (en) 1978-06-20 1978-06-20 Disc brakes
JP8473779U JPS6316903Y2 (en) 1978-06-20 1979-06-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7827428A GB2026626B (en) 1978-06-20 1978-06-20 Disc brakes

Publications (2)

Publication Number Publication Date
GB2026626A true GB2026626A (en) 1980-02-06
GB2026626B GB2026626B (en) 1982-10-13

Family

ID=10498056

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7827428A Expired GB2026626B (en) 1978-06-20 1978-06-20 Disc brakes

Country Status (2)

Country Link
JP (1) JPS6316903Y2 (en)
GB (1) GB2026626B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536809A1 (en) * 1982-11-26 1984-06-01 Teves Gmbh Alfred SEAL ARRANGEMENT FOR THE GUIDING PIN OF A FLOATING BRAKE DISC BRAKE WITH PARTIAL FITTINGS
GB2160600A (en) * 1984-05-10 1985-12-24 Aisin Seiki Disc brake
US5090520A (en) * 1989-06-12 1992-02-25 Lucas Industries Public Limited Company Spot-type disc brake, including a floating caliper having pressure and heat insulating plate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58109636U (en) * 1982-01-20 1983-07-26 トキコ株式会社 Caliper guide structure in disc brake

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536809A1 (en) * 1982-11-26 1984-06-01 Teves Gmbh Alfred SEAL ARRANGEMENT FOR THE GUIDING PIN OF A FLOATING BRAKE DISC BRAKE WITH PARTIAL FITTINGS
GB2160600A (en) * 1984-05-10 1985-12-24 Aisin Seiki Disc brake
US4662484A (en) * 1984-05-10 1987-05-05 Aisin Seiki Kabushiki Kaisha Pin boot protector in disc brake assembly
US5090520A (en) * 1989-06-12 1992-02-25 Lucas Industries Public Limited Company Spot-type disc brake, including a floating caliper having pressure and heat insulating plate

Also Published As

Publication number Publication date
JPS6316903Y2 (en) 1988-05-13
JPS5529799U (en) 1980-02-26
GB2026626B (en) 1982-10-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970620