GB1560676A - Disc brake - Google Patents
Disc brake Download PDFInfo
- Publication number
- GB1560676A GB1560676A GB3918776A GB3918776A GB1560676A GB 1560676 A GB1560676 A GB 1560676A GB 3918776 A GB3918776 A GB 3918776A GB 3918776 A GB3918776 A GB 3918776A GB 1560676 A GB1560676 A GB 1560676A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bush
- projections
- caliper
- pin
- disc
- 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.)
- Expired
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)
Description
(54) DISC BRAKE
(71) We, TOKICO LTD., a Japanese body corporate of 6-3, Fujimi 1-chome,
Kawasaki-ku, Kawasaki-shi, Kanagawaken, Japan, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
This invention relates to disc brakes and is particularly concerned with disc brakes of the type in which an inner pad disposed on one side of a rotatable disc is urged against the disc by an actuator, such as a cylinder and piston mechanism, and an outer pad disposed on the opposite side of the disc is urged against the disc by a caliper which straddles the disc and is slidable in the direction of the axis of the disc.
In one prior art disc brake of the aforementioned type, the caliper has a pair of pins spaced in the direction of the circumference of the disc and extending in the direction of the axis of the disc, and the outer periphery of at least one of the pins is covered by a bush formed of resilient material. The pins are slidably engaged with guide bores formed in a stationary member and extending respectively in the direction of the axis of the disc, thereby supporting the caliper on the stationary member.
The bush is provided for preventing vibration and, usually, the configuration and the size of the bush have been determined such that they are larger than the clearance or gap between the guide bore and the pin around the entire periphery of the bush whereby the bush has been fitted in the guide bore with an interference around the entire periphery. Thus, shortcomings have been encountered such that (a) high accuracy in finishing has been required in relating parts so as to obtain a suitable interference; (b) when the interference becomes large, sliding resistance of the pin increases; and (c) even though the interference is suitable initially, the smooth sliding movement of the pin will be impaired when lubricant such as grease is exhausted after a long period of usage.
According to the present invention a disc brake includes a stationary member adapted to be mounted on a non-rotatable part of a vehicle, a caliper member slidably supported on the stationary member by at least one pin which is fixed to one of said caliper and stationary members, a guide bore formed in the other of said members for slidably receiving the pin, and a bush formed of resilient material and disposed between the pin and the guide bore, said bush having at least two pairs of axially and diametrically oppositely extending projections on one of the outer and inner peripheries thereof.
The invention will now be further described, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a plan view of a reaction-type disc brake embodying the present invention.
Figure 2 is a front view odf the disc brake of Figure 1;
Figure 3 is a side view of the disc brake of
Figure 1;
Figure 4 is a cross-sectional view taken along line IV-IV in Figure 1;
Figure 5 is a cross-sectional view, to a larger scale, of a bush incorporated in the disc brake of Figures 1 to 4, and taken generally along line V-V in Figure 4; and
Figure 6 is a cross-sectional view, similar to Figure 5, but showing a bush of a modified form.
In Figures 1 to 3, a generally U-shaped stationary member 1 of a sliding caliper or reaction type disc brake has two arms la and 1b on the opposite sides thereof and is secured by two bolts (not shown) passing through two bolt holes 2 and 3 respectively to a non-rotatable part (not shown) of a vehicle, such as a spindle knuckle of a
McPherson type suspension strut or the like.
A pair of brake pads 5, 6, having a rotatable disc 4 interposed therebetween, are supported on the stationary member 1 so as to be displaceable in the direction of the axis of the disc 4. A pair of guide bores 7, 8 extending in the direction of the axis of the disc 4 are formed respectively in the arms la, tb of the stationary member 1.
A caliper 9, having an actuator (piston cylinder mechanism) 10 on one side thereof for urging the brake pad 5 toward the disc 4, straddles the disc 4 so as to extend to the rear side of the brake pad 6. A pair of pins 11, 12, extending in the direction of the axis of the disc 4, are secured to the caliper 9, and a respective bush 13 formed of resilient material covers each of the pins 11, 12 as shown in Figure 4 and is slidably fitted in corresponding guide bore 7 or 8. In operation, the bushes move, integrally with the pins 11 and 12, slidably with respect to guide bores 7 and 8, i.e., the outer peripheries of the bushes slidably engage the respective inner walls of the guide bores. In this connection, the bush 13 may be omitted from one of the pins 11 and 12. A boot 14 prevents the ingress of water, dust or the like between the guide bore and the bush.
Shown at 15 is a bolt securing the pin 12 (11) to the caliper 9 and at 16 is a washer.
Figure 5 is an enlarged cross-sectional view of the bush 13 when the bush is not assembled into the disc brake. The bush 13 has three pairs of diametrically oppositely extending projections 13a arranged along the periphery of the cross-section, adjacent projections being separated by respective despressions 13b. The projections 13a define a common outer diameter "a" and the depressions 13b define a common outer diameter "b" as shown. The configuration of the projections and the depressions and the dimensions "a" and "b" are determined such that when the bush 13 is fitted between the guide bore 7 or 8 and the pin 11 or 12, the projections 13a are received with an interference fit in the guide bore (the diameter of which is shown as "c" in Figure 5) and the depressions 13b will leave gaps between the inner periphery of the guide bore although the diameter "b" will increase by a small amount when the bush is fitted in the guide bore. The gaps thus formed can receive lubricant therein.
It will be noted that the projections 13a and the depressions 13b may not necessarily be disposed in the outer circumference of the bush 13; it is equally possible to form projections and correspnding depressions in the inner circumference of the bush 13, with the inner diameter of the projections being smaller that the outer diameter of the pin and the inner diameter of the depressions being larger than the diameter of the pin
Preferably, the diametrically opposed pairs of projections 13a are arranged symmetrically with respect to the axis of the pin.
It is essential that at least two of said pairs of projections are formed around the periphery of the bush so that when the bush is located between the pin and the guide bore the depressions form lubricant receiving gaps between the bush and the guide bore or the pin equally spaced around the periphery thereof.
Figure 6 shows a modified form of the bush 13, in which two pairs of said projections 13a, separated by respective depressions 13b, are arranged in the outer periphery of the bush so as to form a generally wave-like configuration.
In the above embodiments, the guide bores 7, 8 are formed in the stationary member 1 and the pins 11, 12 are secured to the caliper 9. Alternatively, it is possible to form the guide bores 7, 8 in the caliper 9 and to mount the pins 11, 12 on the stationary member to slidably support the caliper on the stationary member. Furthermore, the brake pad 6 (the outer pad) is slidably supported on the stationary member 1 in the illustrated embodiments, but alternatively the brake pad 6 may be supported on the caliper 9.
By virtue of the foregoing constructions, the following advantages or effects are obtained:
a) The bush can suppress vibrations in the disc brake and assure smooth sliding movement of the caliper.
b) In manufacturing the disc brake, high accuracy in machining operation is not required.
c) The depressions formed in the outer or the inner circumference of the bush between the projections 13a act to form lubricant receiving or storing cavities which prevent sticking of the bush.
d) When the guide bore 7 or 8 is a blind bore with a closed end (usually guide bores formed in the stationary member have such a construction) the depressions formed in the circumference of the bush act as vent holes when the bush moves along the guide bore.
WHAT WE CLAIM IS:
1. A disc brake including a stationary member adapted to be mounted on a non-rotatable part of a vehicle, a caliper member slidably supported on the stationary member by at least one pin which is fixed to one of said caliper and stationary members, a guide bore formed in the other of said members for slidably receiving the pin, and a bush formed of resilient material and disposed between the pin and the guide bore, said bush having at least two pairs of axially and diametrically oppositely extending, projections on one of the outer and
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (7)
- **WARNING** start of CLMS field may overlap end of DESC **.McPherson type suspension strut or the like.A pair of brake pads 5, 6, having a rotatable disc 4 interposed therebetween, are supported on the stationary member 1 so as to be displaceable in the direction of the axis of the disc 4. A pair of guide bores 7, 8 extending in the direction of the axis of the disc 4 are formed respectively in the arms la, tb of the stationary member 1.A caliper 9, having an actuator (piston cylinder mechanism) 10 on one side thereof for urging the brake pad 5 toward the disc 4, straddles the disc 4 so as to extend to the rear side of the brake pad 6. A pair of pins 11, 12, extending in the direction of the axis of the disc 4, are secured to the caliper 9, and a respective bush 13 formed of resilient material covers each of the pins 11, 12 as shown in Figure 4 and is slidably fitted in corresponding guide bore 7 or 8. In operation, the bushes move, integrally with the pins 11 and 12, slidably with respect to guide bores 7 and 8, i.e., the outer peripheries of the bushes slidably engage the respective inner walls of the guide bores. In this connection, the bush 13 may be omitted from one of the pins 11 and 12. A boot 14 prevents the ingress of water, dust or the like between the guide bore and the bush.Shown at 15 is a bolt securing the pin 12 (11) to the caliper 9 and at 16 is a washer.Figure 5 is an enlarged cross-sectional view of the bush 13 when the bush is not assembled into the disc brake. The bush 13 has three pairs of diametrically oppositely extending projections 13a arranged along the periphery of the cross-section, adjacent projections being separated by respective despressions 13b. The projections 13a define a common outer diameter "a" and the depressions 13b define a common outer diameter "b" as shown. The configuration of the projections and the depressions and the dimensions "a" and "b" are determined such that when the bush 13 is fitted between the guide bore 7 or 8 and the pin 11 or 12, the projections 13a are received with an interference fit in the guide bore (the diameter of which is shown as "c" in Figure 5) and the depressions 13b will leave gaps between the inner periphery of the guide bore although the diameter "b" will increase by a small amount when the bush is fitted in the guide bore. The gaps thus formed can receive lubricant therein.It will be noted that the projections 13a and the depressions 13b may not necessarily be disposed in the outer circumference of the bush 13; it is equally possible to form projections and correspnding depressions in the inner circumference of the bush 13, with the inner diameter of the projections being smaller that the outer diameter of the pin and the inner diameter of the depressions being larger than the diameter of the pin Preferably, the diametrically opposed pairs of projections 13a are arranged symmetrically with respect to the axis of the pin.It is essential that at least two of said pairs of projections are formed around the periphery of the bush so that when the bush is located between the pin and the guide bore the depressions form lubricant receiving gaps between the bush and the guide bore or the pin equally spaced around the periphery thereof.Figure 6 shows a modified form of the bush 13, in which two pairs of said projections 13a, separated by respective depressions 13b, are arranged in the outer periphery of the bush so as to form a generally wave-like configuration.In the above embodiments, the guide bores 7, 8 are formed in the stationary member 1 and the pins 11, 12 are secured to the caliper 9. Alternatively, it is possible to form the guide bores 7, 8 in the caliper 9 and to mount the pins 11, 12 on the stationary member to slidably support the caliper on the stationary member. Furthermore, the brake pad 6 (the outer pad) is slidably supported on the stationary member 1 in the illustrated embodiments, but alternatively the brake pad 6 may be supported on the caliper 9.By virtue of the foregoing constructions, the following advantages or effects are obtained: a) The bush can suppress vibrations in the disc brake and assure smooth sliding movement of the caliper.b) In manufacturing the disc brake, high accuracy in machining operation is not required.c) The depressions formed in the outer or the inner circumference of the bush between the projections 13a act to form lubricant receiving or storing cavities which prevent sticking of the bush.d) When the guide bore 7 or 8 is a blind bore with a closed end (usually guide bores formed in the stationary member have such a construction) the depressions formed in the circumference of the bush act as vent holes when the bush moves along the guide bore.WHAT WE CLAIM IS: 1. A disc brake including a stationary member adapted to be mounted on a non-rotatable part of a vehicle, a caliper member slidably supported on the stationary member by at least one pin which is fixed to one of said caliper and stationary members, a guide bore formed in the other of said members for slidably receiving the pin, and a bush formed of resilient material and disposed between the pin and the guide bore, said bush having at least two pairs of axially and diametrically oppositely extending, projections on one of the outer andinner peripheries thereof.
- 2. A disc brake as claimed in claim 1 wherein said projections are equally spaced in the circumferential direction.
- 3. A disc brake as claimed in claim 1, wherein said projections are formed on the outer periphery of the bush and engage the guide bore with a sliding interference fit therebetween.
- 4. A disc brake as claimed inm claim 1 wherein said projections are formed in the inner periphery of the bush, and engage the pin with a sliding interference fit therebetween.
- 5. A disc brake as claimed in any preceding claim in which the pin is fixed to the caliper and the guide bore is in the suppoerting member.
- 6. A disc brake as claimed in any preceding claim in which the caliper member is mounted on the supporting member by two axially parallel, circumferentially spaced pins slidablys received in corresponding guide bores with respective resilient bushes disposed between the pins and the guide bores.
- 7. A disc brake constructed substantially as herein described with reference to and as illustrated in the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3918776A GB1560676A (en) | 1976-09-22 | 1976-09-22 | Disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3918776A GB1560676A (en) | 1976-09-22 | 1976-09-22 | Disc brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1560676A true GB1560676A (en) | 1980-02-06 |
Family
ID=10408174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3918776A Expired GB1560676A (en) | 1976-09-22 | 1976-09-22 | Disc brake |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1560676A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2151728A (en) * | 1983-12-23 | 1985-07-24 | Teves Gmbh Alfred | Floating caliper spot-type disc brake |
| FR2562621A1 (en) * | 1984-04-04 | 1985-10-11 | Teves Gmbh Alfred | GUIDE AND DAMPING SOCKET FOR A DISC BRAKE CALIPER PIN |
| WO2009059762A1 (en) * | 2007-11-09 | 2009-05-14 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disc brake for a utility vehicle |
| CN102216641B (en) * | 2008-11-13 | 2013-06-05 | 罗伯特博世有限公司 | Sleeve for disc brake caliper and disc brake fitted with such a sleeve |
| CN104196928A (en) * | 2014-08-20 | 2014-12-10 | 安徽江淮汽车股份有限公司 | Pin hole matching structure for brake caliper |
| TWI675970B (en) * | 2018-06-19 | 2019-11-01 | 三陽工業股份有限公司 | Brake caliper device |
-
1976
- 1976-09-22 GB GB3918776A patent/GB1560676A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2151728A (en) * | 1983-12-23 | 1985-07-24 | Teves Gmbh Alfred | Floating caliper spot-type disc brake |
| FR2562621A1 (en) * | 1984-04-04 | 1985-10-11 | Teves Gmbh Alfred | GUIDE AND DAMPING SOCKET FOR A DISC BRAKE CALIPER PIN |
| WO2009059762A1 (en) * | 2007-11-09 | 2009-05-14 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Disc brake for a utility vehicle |
| CN101821526B (en) * | 2007-11-09 | 2012-08-22 | 克诺尔商用车制动系统有限公司 | Disc brake for a utility vehicle |
| US9816577B2 (en) | 2007-11-09 | 2017-11-14 | Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh | Disc brake for a commercial vehicle |
| CN102216641B (en) * | 2008-11-13 | 2013-06-05 | 罗伯特博世有限公司 | Sleeve for disc brake caliper and disc brake fitted with such a sleeve |
| CN104196928A (en) * | 2014-08-20 | 2014-12-10 | 安徽江淮汽车股份有限公司 | Pin hole matching structure for brake caliper |
| TWI675970B (en) * | 2018-06-19 | 2019-11-01 | 三陽工業股份有限公司 | Brake caliper device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |