GB2345104A - A bearing device for mounting a sliding calliper of a disc brake - Google Patents

A bearing device for mounting a sliding calliper of a disc brake Download PDF

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Publication number
GB2345104A
GB2345104A GB9927450A GB9927450A GB2345104A GB 2345104 A GB2345104 A GB 2345104A GB 9927450 A GB9927450 A GB 9927450A GB 9927450 A GB9927450 A GB 9927450A GB 2345104 A GB2345104 A GB 2345104A
Authority
GB
United Kingdom
Prior art keywords
guide
sliding calliper
bearing
bushing
brake
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.)
Withdrawn
Application number
GB9927450A
Other versions
GB9927450D0 (en
Inventor
Armin Theiss
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.)
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
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 Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH filed Critical Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Publication of GB9927450D0 publication Critical patent/GB9927450D0/en
Publication of GB2345104A publication Critical patent/GB2345104A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02Brakes 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
    • F16D55/22Brakes 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
    • F16D55/224Brakes 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
    • F16D55/225Brakes 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
    • F16D55/226Brakes 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
    • F16D55/2265Brakes 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
    • F16D55/22655Constructional details of guide pins
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02Parts of sliding-contact bearings
    • F16C33/04Brasses; Bushes; Linings
    • F16C33/22Sliding surface consisting mainly of rubber or synthetic rubber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2361/00Apparatus or articles in engineering in general
    • F16C2361/45Brakes

Abstract

A bearing device for mounting a sliding calliper (6 Fig.1) of a disk brake for commercial vehicles on a brake anchor plate (2), comprises a guide rod (4), 5 slidably mounted in an elastomer guide bushing(s) (10, 11) or 12 of a guide bearing (7,8). To improve the operational accuracy of the bearing device of the sliding calliper and to reduce its sensitivity to dirt and water, at least one helical groove 16 whose axis extends in the longitudinal direction of the guide bearing is constructed in the outer surface of the guide rod and/or in the inner surface of the guide bushing(s). In this way, an exact radial and axial guidance of the guide rod in the guide bushing(s) is achieved. Further sealing, in particular by way of bellows, is not necessary because the groove allows trapped dirt to be worked out.

Description

2345104 SLIDING-CALLIPER DISK BRAKE The invention relates to a device for
mounting a sliding calliper of a sliding calliper disk brake, and to a pneumatic sliding calliper disk brake for commercial vehicles provided with such a device.
EP 0 626 524 B1 discloses a pneumatic sliding calliper disk brake for commercial vehicles, in which the outer surface of a guide rod or bar is slidingly (displaceably) mounted against the inner surface of a guide bushing of a guide bearing. The guide bushing consists of an elastomer material. As a result of the elasticity associated with an elastomer material, in is the known device a restoring force is produced which leads to undesirable play in the sliding calliper mounting. Furthermore there are recesses in the guide bushing, described in EP 0 626 524 B1; these are used for the damping of the sliding calliper mounting. So that they do not become dirty, sealing lips and sealing profiles are provided on the guide bushing. In particular the sealing lips can be easily damaged during operation of the disclosed sliding calliper disk brake. once dirt is present in the recesses of the guide bushing it can no longer be removed.
It is desirable to improve further the operational accuracy of a device for mounting a sliding calliper of a sliding calliper disk brake for commercial vehicles as well as a pneumatic sliding calliper disk brake provided with this device and to reduce the sensitivity of the sliding calliper disk brake to dirt and water.
To this end, the invention provides the bearing, which is preferably cylindrical, with a generally helical groove around one or both of the sliding surfaces.
A helical groove, provided in accordance with the invention, in the outer surface of the guide bar and/or in the inner surface of the guide bushing with its axis in the longitudinal direction of the guide bearing creates a large area, in which dirt and water can initially collect. By way of the movement of the guide bar in the guide bushing (this movement being necessary for the operation of the sliding calliper disk brake) a relative movement takes place between these components.
This relative movement is associated with a conveying effect for the impurities and the water. A cleaning action over the circumference and the entire length of the guide bar and the guide bushing is thereby achieved in such a way that impurities and water can leave the guide bearing. Further sealing, in particular in the form of bellows, is not necessary. The manufacture of the device in accordance with the invention is particularly easy if the guide bar is constructed with the helical groove, whereas the guide bushing has a smooth inner surface.
A particularly advantageous construction of the groove it is sharp-edged. There is therefore a particularly effective dirt scraper between the outer surface of the guide bar and the inner surface of the guide 'bushing.
To compensate for possible tolerances and for the purpose of oscillation damping, in embodiments of the invention a sheath or cover is constructed on the outer surface of the guide bushing. The cover preferably--__ consists of a compressible material, in particul'Lr an elastomer material.
A pneumatic sliding calliper disk brake in accordafice with the invention for commercial vehicles has at least one device for mounting a sliding calliper of a sliding calliper disk brake, in which the outer surface of a guide bar is displaceably mounted against the inner surface of a guide bushing of a guide bearing, with at least one helical groove, extending in the longitudinal direction of the guide bearing, being constructed in the outer surface of the guide bar and/or in the inner surface of the guide bushing. If there are several such devices provided in parallel for mounting the sliding calliper then they can be designed to be identical. This facilitates manufacture and reduces manufacturing and storage costs. Even if one bearing is longer than another it can be formed from two or more identical bearing devices.
If at least one cover or sleeve is arranged on the outer surface of a guide bushing, then even with basic devices (i.e. guide bar and bushings) for mounting the sliding calliper of otherwise identical construction, a fixed bearing, a movable bearing or a transition fit can be realized in the sliding calliper disk brake as required.
By construction and/or coating of the outer surface of the guide bar and/or the inner surface of the guide bushing with a wear-resistant material and/or a low friction material, a device in accordance with the invention for the mounting of a sliding calliper, or a pneumatic sliding calliper disk brake provided with the device in accordance with the invention, is advantageously constructed to be highly wear-resistant and easily operable.
Further features and advantages of the invention are evident with reference to the following description of several embodiments which are explained with reference to the drawings, in which:
Figure 1 shows a diagrammatic top view of a pneumatic sliding calliper disk brake using devices in accordance with the invention for commercial vehicles; Figure 2 shows a perspective, partially sectioned view of a first device in accordance with the invention for mounting a sliding calliper; Figure 3 shows a perspective, partially sectioned view of an alternative embodiment of the device in accordance with the invention for mounting a sliding calliper; and Figure 4 shows a perspective, partially sectioned view of the guide bushing shown in Figure 3, on its own.
Figure 1 shows a diagrammatic top view of a pneumatic sliding calliper disk brake 1. The sliding calliper disk brake 1 is secured by means of a brake anchor plate 2 to a frame of a commercial vehicle (not shown).
A first guide bar 4 and a second guide bar 5 are secured in parallel arrangement to the brake anchor plate 2 in the radial direction of a brake disk 3. In the embodiment shown, the first guide bar 4 is constructed to be longer than the second guide bar 5.
However, this is not imperative; rather, the two guide bars 4, 5 can be of equal length.
The sliding calliper disk brake 1 has a sliding calliper 6 in which two bores are constructed. The two bores each form a guide bearing 7 and 8 for the displaceable mounting of the sliding calliper 6 on the guide bars 4 and 5 of the brake anchor plate 2. After the assembly of the sliding calliper 6 on the guide bars 4 and 5 of the brake anchor plate 2, the sliding calliper 6 encloses the brake disk 3 so that brake blocks, not shown, provided on both sides of the brake 5_ disk 3, have a specified clearance from the wheel surface of the brake disk 3 in the unactuated state of the sliding calliper disk brake 1.
on compressed-air loading of a brake cylinder, not shown, a brake application device 9, only shown diagrammatically, presses the brake block located on its side against the brake disk 3. As the pressure increases further, the sliding calliper 6 is displaced 10 until the opposite brake block likewise abuts the brake disk 3. In this tightened state the brake disk 3 is braked by the friction of its friction surfaces on the brake blocks in dependence upon the respective brake pressure. 15 The guide bar or rod 4 is mounted in the guide bearing 7. For this purpose, two guide bushings 10 and 11 provided which are each arranged on one of the edge regions (i.e. the axial ends) of the guide bearing 7. 20 Although in the embodiment shown two guide bushings 10 and 11 are provided in the guide bearing 7, it is optionally possible to use an even greater number of guide bushings if this appears advantageous. It is 25 likewise possible to use a single guide bushing manufactured from an elastomer material, the length of which corresponds, for example, to that of the guide bearing 7. 30 on the right side of the sliding calliper disk brake 1 shown in Figure 1 a single guide bushing 12 is provided in the guide bearing 8 for mounting the guide bar 5. Here the length of the guide bushing 12 corresponds to the length of the guide bearing 8, i.e. the right-hand 35 bearing 8 is shorter than the left-hand 7.
From Figure 1 it can be seen that all the guide bushings 10, 11 and 12 shown there are identical. In this way it is possible to be able to provide a single type of guide bushing, this facilitating production and storage.
Figure 2 shows a perspective, partially sectioned view of a first device 13 in accordance with the invention for mounting the sliding calliper 6 of Figure 1. In this embodiment the device 13 consists of the guide bar and the guide bushing 12. The outer surface 14 of the guide bar 5 abuts the inner surface 15 of the guide bushing 12. In this way, the guide bar 5 is longitudinally displaceable in the longitudinal direction L of the guide bearing 8 and is mounted so that it is rotationally displaceable about the longitudinal direction L.
The guide bar 5 is here constructed as a hollow cylinder. On its outer surface 14 there is a groove 16 which extends in a helical manner over the entire length of the guide bar 5. In the embodiment shown, the rise of the groove 16 is formed to be moderate - the pitch is considerably less than the diameter. The rise can be freely selected as appropriate. As can be seen from Figure 2, the groove is sharp-edged, resulting in a particularly good dirt.scraper effect between the outer surface 14 of the guide bar and the inner surface 15 of the guide bushing 12.
The basic device 13, which consists of the guide bar 5 and the guide bushing 12, allows secure mounting of the sliding calliper 6 of the sliding calliper disk brake 1 shown in Figure 1. By selection of the relative dimensions of the components, the device 13 can be formed as a fixed bearing. For tolerance compensation a cover 19 may be provided on the outer surface 18 of the guide bushing 12, the cover being located between the basic device 13 and the guide bearing 8 when the sliding calliper is installed into disk brake 1. The cover 19 extends over the entire length of the guide bushing 12.
Whereas the guide bar 5 and the guide bushing 12 consist of a corrosion-resistant and wear-resistant material, which is, for example, a plasma-coated or diamond-coated metal or a ceramic material, the cover 19 is made from an elastomer material. This is a simple way of providing tolerance compensation in the guide bearing 8. The cover 19 can be sprayed on to the is guide bushing 12 or attached or shrunk on as a separate cylinder sleeve.
Figure 3 shows an alternative embodiment of the device 13 shown in Figure 2. The alternative device 131 shown in Figure 3 likewise comprises a guide bar 51 and a guide sleeve 121. However, in the example shown here the guide bar 51 is designed to be smooth on its outer surface 141, i.e. it does not have a groove 16.
Rather, the guide bushing 121 is provided at its inner surface 151 which faces the outer surface 141 of the guide bar 51 with a helical groove 161 which extends over the entire length of the guide bushing 121. A cover 191 is arranged on the outer surface 181 of the guide bushing 121, as already known from Figure 2. The mode of operation of the device 131 shown in Figure 3, its materials and additional previously described features and advantages are comparable with those of the device 13 described in Figure 2.
Both the guide bar 5 and the guide bar 51 have a feed through opening 21 and 211 for receiving a screw 22 shown in Figure 1.
The guide bushing 121 shown in Figure 3 is shown again in Figure 4 without the guide bar 51. Here also the dimensions and the rise of the groove 161 are freely selectable in such a way that an optimal dirt scraper effect with exact radial and axial guidance of the guide bar 5' is achieved.
Reference is made to the fact that the embodiments of the device 13, 131 in accordance with the invention, shown in Figures 2 to 4, can also be provided in the guide bearing 7 shown in Figure 1. In each case according to the dimensioning of the covers 19 and 191 it is possible to achieve a transition fit with relatively narrow clearance or optionally a slight press fit in the guide bearing 7. In this case the guide bushing 12 shown in Figure 1 has a corresponding cover 19 in order to achieve a clearance fit in the guide bearing 8. In this way, the sliding calliper 6 is mounted in a stable manner in terms of guidance.
List of reference symbols 1 sliding calliper disk brake 2 brake anchor plate 3 brake disk 4 guide bar 5, 5' guide bar 6 sliding calliper 7 guide bearing 8 guide bearing 9 brake application device guide bushing 11 guide bushing 12, 121 guide bushing is 13, 131 device for the mounting of the sliding calliper 14, 141 outer surface of the guide bar is, 151 inner surface 16, 161 groove 181 181 outer surface of the guide bushing 191 191 cover 21 feed-through opening 22 screw L longitudinal direction

Claims (12)

Claims
1. A device for mounting of a sliding calliper (6) of a sliding calliper disk brake (1), having a guide rod (4, 5, 51) displaceably mounted via its outer surface (14, 141) against the inner surface (15, 151) of a guide bushing (10, 11, 12, 121) of a guide bearing (7, 8), wherein at least one helical groove (16, 161) extending in the longitudinal direction (L) of the guide bearing (7, 8) is formed in the outer surface (14, 141) of the guide bar (4, 5, 51) and/or in the inner surface (15, 151) of the guide bushing (10, 11, 12, 121).
2. A device according to claim 1, the groove (16, 161) is sharp-edged.
3. A device according to claim 1 or 2, wherein the groove (16, 161) extends over the entire length of the outer surface (14, 141) of the guide bar (4, 5, 51) and/or over the entire length of the inner surface (15, 151) of the guide bushing (10, 11, 12, 121).
4. A device according to any one of claims 1 to 3, wherein the outer surface (14, 141) of the guide bar (4, 5, 51) and/or the inner surface (15, 151) of the guide bushing (10, 11, 12, 121) is constructed from a wear-resistant material and/or coated with a wear resistant material.
5. A device according to any preceding claim wherein the outer surface (14, 141) of the guide bar (4, 5, 51) and/or the inner surface (15, 151) of the guide bushing (10, 11, 12, 121) is constructed from a low-friction material and/or coated with a low-friction material.
6. A device according to any preceding claim wherein at least one sheath (19, 191) is located on the outer surface (18, 181) of the guide bushing (10, 11, 12, 121). 5
7. A device according to claim 6, wherein the sheath (19, 191) is constructed to be compressible.
8. A device according to claim 6 or 7, wherein the sheath (19, 191) consists of an elastomer.
9. A sliding calliper disk brake (1) for commercial vehicles, whose sliding calliper (6) is mounted so as to be displaceable in the radial direction of the brake disk (3) by means of two guide bearings (7, 8) on corresponding guide bars (4, 5, 51) of a brake anchor plate (2), fixed to the vehicle, at least one device (13, 131) according to any preceding claim is provided for the said mounting of the sliding calliper (6). 20
10. A sliding calliper disk brake (1) according to claim 9, wherein the guide bearing (7, 8) is constructed with a recess to receive a guide bushing (12, 121) of the device. 25
11. A sliding calliper disk brake (1) according to claim 9 or 10, wherein two guide bushings (10, 11) are located in one guide bearing (7), and in that a single guide bushing (12, 121) is located in the other guide 30 bearing (8), all the guide bushings (8, 12, 121) being of substantially the same size.
12. A device or a sliding calliper disk brake (2) substantially as described with reference to any of the 35 embodiments shown in Figures 1 to 4.
GB9927450A 1998-11-19 1999-11-19 A bearing device for mounting a sliding calliper of a disc brake Withdrawn GB2345104A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853439A DE19853439B4 (en) 1998-11-19 1998-11-19 Sliding caliper disc brake for commercial vehicles

Publications (2)

Publication Number Publication Date
GB9927450D0 GB9927450D0 (en) 2000-01-19
GB2345104A true GB2345104A (en) 2000-06-28

Family

ID=7888375

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9927450A Withdrawn GB2345104A (en) 1998-11-19 1999-11-19 A bearing device for mounting a sliding calliper of a disc brake

Country Status (3)

Country Link
DE (1) DE19853439B4 (en)
GB (1) GB2345104A (en)
SE (1) SE514883C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8944221B2 (en) 2007-01-05 2015-02-03 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Disk brake for a commercial vehicle
US9816577B2 (en) 2007-11-09 2017-11-14 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Disc brake for a commercial vehicle

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10150214B4 (en) * 2001-10-12 2020-10-29 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Disc brake, in particular for a utility vehicle
DE102004029462A1 (en) * 2004-06-18 2006-01-05 Continental Teves Ag & Co. Ohg Floating caliper disc brake with bolt guides
DE102013013030B4 (en) * 2013-08-05 2015-05-21 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Disc brake for a commercial vehicle
JP6803931B2 (en) * 2017-01-26 2020-12-23 日立オートモティブシステムズ株式会社 Disc brake

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365695A (en) * 1979-06-26 1982-12-28 Lucas Industries Limited Disc brake and friction pad assembly therefor
GB2151728A (en) * 1983-12-23 1985-07-24 Teves Gmbh Alfred Floating caliper spot-type disc brake
FR2771149A1 (en) * 1997-11-20 1999-05-21 Bosch Syst Freinage Vehicle disc brake column with floating stirrup

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2521871C2 (en) * 1975-05-16 1982-06-03 Alfred Teves Gmbh, 6000 Frankfurt Fastener guide
DE2931804C2 (en) * 1979-08-06 1986-06-19 Alfred Teves Gmbh, 6000 Frankfurt Guide element
JPS62132043A (en) * 1985-12-05 1987-06-15 Akebono Brake Ind Co Ltd Supporting construction for caliper
DE4314719A1 (en) * 1993-05-04 1994-11-10 Knorr Bremse Ag Air operated sliding caliper disc brake for commercial vehicles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365695A (en) * 1979-06-26 1982-12-28 Lucas Industries Limited Disc brake and friction pad assembly therefor
GB2151728A (en) * 1983-12-23 1985-07-24 Teves Gmbh Alfred Floating caliper spot-type disc brake
FR2771149A1 (en) * 1997-11-20 1999-05-21 Bosch Syst Freinage Vehicle disc brake column with floating stirrup

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8944221B2 (en) 2007-01-05 2015-02-03 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Disk brake for a commercial vehicle
US9816577B2 (en) 2007-11-09 2017-11-14 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Disc brake for a commercial vehicle

Also Published As

Publication number Publication date
SE9904135L (en) 2000-05-20
SE514883C2 (en) 2001-05-07
SE9904135D0 (en) 1999-11-16
DE19853439B4 (en) 2004-03-25
DE19853439A1 (en) 2000-06-08
GB9927450D0 (en) 2000-01-19

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