DE2742964A1 - DISC BRAKE - Google Patents

Description

DR. ING. F. WUESTHOFF

DR. E. ν. PKClI MAN DR. IN (J. IJ. IJKHHENS

DiPi .. inc ;, it. Ct) KTZ PATENT LAWYERS MOOO MUNICH OO

SCIIWEIÜEHSTHASSE 2 TELEKON (089) 66 20 51 tele, 3 2 * 27 42 96

TKI, K (IHAMMK: *

PiIOTEOTHATENT MUNICH

1A-49847

Patent application

Applicant:

Girling Limited, Kings Road, Tyseley, Birmingham 11, West Midlands, England

Title:

Disc brake

809813/0978

UH. ING. F. WUKSTHOFF

DR.K ν. PKCHMANN OR. ING. D. BKHRRNS DIPL ,. IN". K. GOKTZ

PATENT LAWYERS

8 MUNICH 9O

SCH WEIU ERSTRASSE 2 TKLKFON (089) 66 20 91 TKLKX

TELKORAMMK ι

1A-49847

DESCRIPTION

The invention relates to disc brakes for vehicles in which brake shoe assemblies for cooperating are arranged with them facing surfaces of a rotatable brake disc in a housing, and in which at least one of the brake shoe assemblies in the housing at least in one radial direction through at least one in the axial direction Direction extending retaining bolt is set.

In a disc brake of the type mentioned, a caliper can belong to the housing, which part of the edge of the Brake disc overlaps. In another construction, a bracket part or the like can belong to the housing, the opposite a stationary component is movable and extends over the latter, wherein one of the brake shoe assemblies is guided to cooperate with an adjacent surface of the brake disc in the stationary component.

In known disc brakes of this type, the retaining bolt through aligned openings in relatively stationary, separated by an axial distance Guide parts of the housing, e.g. openings which form the ends of an opening separated by an axial distance, which extends in the circumferential direction of the housing, and through which at least one of the brake shoe assemblies extends can be pulled out of the brake in the radial direction after the retaining bolt has been removed.

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In a known construction of a disc brake of the type mentioned, the bolt is in its position by a resilient Clamp held, which is guided through a diametrical opening of the bolt and attached to a part of the housing supports. With this construction, it is difficult to drill the diametrical opening because of the drill must begin its cut on the curved surface of the bolt, and furthermore it is usually necessary to to orient the bolt so that the opening is in a certain direction, usually radially to the brake disc extends, in which the resilient clip can be inserted. Furthermore, the resilient clip claims one appropriate space and it can interrupt the smooth profile of the entire brake.

In another construction, the bolt can be provided at one end with a cranked portion which is releasable Can be brought into engagement with a bushing or the like, by means of which the bolt is held in such a way that it is cannot rotate with respect to the housing; here the free end of the bolt is provided with a groove to allow a resilient attachment To hold the cap, by means of which the bolt is held in its position, so that it does not have any axial movements can run against the housing. Not only is this construction cumbersome, but it must be made in a number of ways Work steps are carried out.

In a further disc brake construction of the type mentioned, the bolt in the openings of the through a distance separate parts held in a friction-locked manner. With this construction, the bolt can be slotted or rolled Pipe that is relatively expensive to manufacture and that tends to get near by by a gap separate parts to expand bell-shaped, so that the withdrawal of the bolt is hindered and that the new brake shoe assemblies cannot be held exactly in the desired position.

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In another known construction, a thickened head at the free end of one becomes of a smaller diameter having portion guided by a dowel pin to elastically cooperate with one of the openings, wherein the diameter of the head is slightly larger than the inner diameter of the roll pin. With this arrangement, the Removal of the pin or bolt hindered by the occurrence of corrosion, and attempts to drive out the pin itself or together with the dowel pin, can lead to a deformation of the end portion, so that the removal of the pin is again difficult.

The invention has now created a disc brake of the type mentioned, in which the bolt or pin at one end an anchoring portion for cooperation with a first opening in a first part of the housing as well as a reaction section which is suitable to cooperate with a part of the housing so that during the insertion of the anchoring section into the opening the pin is forced to move axially, with a progressive resilient deformation of the anchoring portion taking place in a direction towards the one on the right Angle to the axis of the brake disc extending component belongs, this deformation due to the cooperation of the Anchoring portion is brought about with the wall of the opening and wherein the introduction of the anchoring portion in the opening causes an anchoring between the anchoring portion and the wall of the opening.

The reaction section of the pin can cooperate with a second opening, which is designed as an opening matching the first opening in a second part of the housing, which is separated by an axial distance from the first part and arranged coaxially therewith. To the case may include a stationary component in which the first and the second part are stationary relative to one another. Alternatively the housing can have parts that can move relative to one another, which move relative to one another when the brake shoes wear

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other can move, with the first opening in the one part and the second opening is formed in the other part.

The pin can be easily inserted into the brake via the openings Alternatively, introduce by applying a single axial force that is needed to anchor the parts to engage, and to remove the pin, one can apply an axial force to the free end of the anchoring portion. The axial force can be applied can be easily applied by hitting, e.g. if the brake shoes are to be replaced; alternatively you can install the pin on a production line using a press.

In another embodiment of the invention, the pin is designed as a U-shaped component, with one of the legs is provided at one end with the anchoring section, while the other leg forms the action section, which cooperates with a second opening of the housing, which is on the same side of the brake disc through a Circumferential distance is separated from the first opening.

Alternatively, the reaction section can include a collar, which is adjacent to the anchoring portion and has a larger diameter so that it is to bear against the first part of the housing comes when the anchoring portion is inserted into the opening. This creates a couple of forces which counteracts the bending moment, and when the anchoring section is fully inserted into the opening, lies the collar adjoins the housing over its entire circumference, and the axis of the undeformed part of the pin runs again parallel to the axis of the brake disc.

By inserting the anchoring portion of the pin into the associated opening, a resilient deformation occurs of the section in question brought about in a direction to the one at right angles to the axis of the brake disc

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running component belongs, and the said portion will thus remain beyond its elastic limit deformed.

The pin can be made of mild steel and have the usual dimensions for such pins, so that the Pin can be repeatedly installed and removed by applying a relatively small axial force, but this force not so small that the pin can accidentally fall out, and not so large that it damages any part of the brake will.

Not only a mechanical engagement is used for anchoring, but also a frictional connection between the anchoring section and the walls of the opening. If there was only a frictional connection, the remaining elasticity of the Anchoring section, through which the pin is biased against the walls of the opening, over a longer period of time disappear as a result of vibration, temperature fluctuations, and other adverse conditions, and then there would be one axial displacement of the pin possible.

Preferably, both the anchoring portion and the opening receiving it have a cylindrical shape, and theirs Axes are initially inclined relative to each other. The pin becomes engaged with a first and a second part of the housing, which are separated by an axial distance, the axis of the first opening against the axis the second opening, and to the anchoring portion of the pin can be a straight extension of the main part of the pin, or the anchoring section can be inclined at an angle with respect to the main part, which differs from the angle of inclination of the opening in the second part. Alternatively, the openings can be cylindrical and coaxially arranged, and the anchor portion may be inclined with respect to the main part of the pin. In both cases, when the pin is inserted into the associated opening, it is forced to adjust to the angle of inclination of the opening adapt, and since the main part of the pen thereby in its

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Is held so that it cooperates with the opening of the first part, the anchoring portion is bent over and brought into engagement with the wall of the opening. If the opening of the second part is coaxial with the opening of the Arranged first part, the second part can have a shoulder which protrudes into the opening to with the anchoring portion to work together where the anchoring section protrudes from the opening.

The pin is preferably provided with a stop which can be brought into contact with the housing for movement to prevent the pin in the axial direction on the second part after the pin has been inserted into the brake is.

The pin can have a constant diameter over its entire length have and at its end facing away from the anchoring portion have a thickened head, the said Forms stop and cooperates with the outer surface of the first part of the housing; alternatively, the anchoring section be formed by a section of smaller diameter, with a shoulder on the gradation is present, which forms the stop and cooperates with the inner surface of the second part of the housing.

The stop determines the position in which the pin is completely inserted into the opening of the second part. It also makes it easier to check the assembly, because it is easy to see whether the stop is on the relevant one Housing part rests or not.

Embodiments of the invention are explained in more detail below with reference to schematic drawings. It shows:

1 shows an axial partial section of a disc brake for a vehicle;

2 shows an axial partial section of a further disc brake;

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3 shows an axial partial section of a further disc brake;

FIG. 4 shows an axial partial section similar to FIG. 3, which illustrates a further development; FIG.

5 shows an axial partial section of a further disc brake; and

6 and 7 each show an axial partial section of a further disc brake to illustrate successive ones Stages of inserting a retaining pin.

In the disc brake shown in Fig. 1 are brake shoe assemblies 1 and 2, which are adjacent to them Working together surfaces of a rotatable brake disc, not shown, housed in a housing 3. In addition Housing 3 includes a brake caliper with legs 4 that are stationary relative to one another and separated by an axial distance and 5, which overlap the brake disc, and at least one of which has an actuating device or is assigned to an actuating device by means of which the brake shoe assemblies can be pressed against the brake disc. The other brake shoe assembly in question is pressed against the brake disc either by a separate actuating device or indirectly by an actuating force of the actuating device which is transmitted to this brake shoe arrangement through the caliper and the associated leg of the caliper, which is connected to the respective Brake shoe assembly cooperates.

A brake shoe 6 or 7, which is carried by a rigid support plate 8 or 9, belongs to each brake shoe arrangement. When the brake is actuated, the braking force acting on the brake shoe arrangements can be absorbed by the caliper and transferred to a stationary component; alternatively, the braking force can be absorbed directly by the stationary component on which the saddle is arranged.

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The brake shoe assemblies are opposed in the saddle 3 Movements in radial direction through at least one unci preferably zv / ei j: ch extending in axial direction pins "- cbjesupports, only one of which can be seen in FIG. 1 is. The pin 10 has a cylindrical shape and has a constant cross section over its length on; in one end it is provided with a thickened head 11, while a straight anchoring section 12 connects to the other end.

The leg 5 of the caliper 3, which lies on the outside of the brake disc when the brake is installed in a vehicle, has a cylindrical opening 13 which runs parallel to the axis of the brake disc, and the leg 4 is provided with a round opening 14 which has substantially the same diameter as the opening 13, which is arranged substantially coaxially with the opening 13, but whose axis is inclined to the axis of the brake disc. The diameter of the openings 13 and 14 is greater than the diameter of the pin 10 so that there is sufficient clearance and the anchoring section 12 can be guided through the opening 13 without hindrance; according to i? 'ig. 1, however, the inclination of the wall of the opening 14 when the anchoring section 12 was inserted into this opening resulted in a resilient deformation in which the anchoring section 12 was bent downwards in order to with a slight elastic bias with the inner edge 15 and the Outer edge 16 of leg 4 to work together at the ends of opening 14 after pin 10 has been fully driven in to bring head 11 to rest on the outer surface of leg 5. In the position of the parts shown in FIG. 1, the mechanical engagement and the frictional engagement cause the anchoring section 12 to fix the pin 10 in such a way that it cannot accidentally move in the direction of the leg 5.

809813/0978

BATH ORIGINAL

49 847

274296A

The pin 10 can be easily inserted into the brake, i.e. the openings 13 and 14 as well as the openings 16a of the support plates 8 and 9, which allow clearance, by applying an axially directed force to the head 11; a similar one can be used to expand the pin 10 Apply force to the free end of the anchoring section 12.

Since the pin 10 cooperates with the leg 4 only at the two points 15 and 16 after its installation in the brake, corrosion that occurs at these points can only be effective within small areas, so that the connections thus made can easily be destroyed if the pin is to be removed.

In the case of the disc brake shown in FIG. 2, the head 11 according to FIG. 1 and the anchoring section are omitted \ / is formed by a section of smaller diameter, this diameter being slightly smaller than that of the opening 14, which in turn has a smaller diameter than the opening 13. Fine shoulder 17 between the anchoring section 12 and the main part of the pin 10 works with the inner surface of the leg 4 together to act as a stop and further movement of the pin in the relevant Direction to prevent.

Otherwise, the disc brake of FIG. 2 corresponds to that of FIG. 1, and therefore parts are corresponding to one another each denoted by the same reference numerals.

In the case of the disc brake shown in FIG. 3, the opening 14 is arranged coaxially with the opening 13, and the anchoring section 12 of smaller diameter is connected to the main part of the pin 10 through a connecting portion connected, which ends at a shoulder 17. The connecting portion 18 has the same diameter as the anchoring portion 12, and it is coaxial with the larger one Having the diameter of the main part of the pin 10 is arranged.

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In this embodiment, the anchoring section l'i! only with the edge 16 frictionally together. A ^v orteil this embodiment is that the hole 14 can be easily drilled.

In the further development shown in FIG. 4, the limb 1 is widened away from the limb 5 in the nxir.ler direction and provided with a radial projection 19 which projects in the direction of the opening 14 and with which the anchoring portion 12 cooperates near its free end. In In this case, the anchoring section 12 thus works in a frictional manner with the edge 16 and one diametrically opposite it lying point on the approach 19 together.

In the disc brake shown only partially in FIG. 5, the pin 10 is designed as a U-shaped component in which the legs 20 and 21 separated by a distance are connected by a bridge section 22. The legs 20 and 'Al protrude through openings 16a of the support plate S, which are arranged at a circumferential distance from one another, in order to secure the associated brake shoe arrangement against movements in the radial direction. A similar pin can serve to support the other brake shoe assembly, not shown.

Each pin 10 is an anchoring section at the end of one leg 20 12 of smaller diameter, which is inserted into an opening 14 of the housing leg 4, the is inclined to the axis of the brake disc. At the same time, the other leg 21 is in a second opening of the leg 4, which runs parallel to the opening 14 and is separated from it by a circumferential distance. Since the leg 21 cooperates with the relatively long second opening For example, the pin 10 is guided so that it moves in an axial direction during installation, the anchoring portion 12 being resiliently deformed as it progresses is inserted into the opening 14 so that it is finally bent over as shown in FIG. 5 after it has been completely inserted into the opening 14 has been introduced.

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In the case of the disc brake shown in FIGS. 6 and 7, the pin 10 has an associated collar 23 which has a larger diameter than the main part of the pin and which is adjacent to the anchoring portion 12. Of the Pin 10 protrudes through an opening 16a of at least one brake shoe arrangement in order to secure it against radial movements.

The anchoring portion 12 is in an opening 14 of the Housing leg 4 introduced, which is inclined against the axis of the brake disc. Once the section 12 in the opening occurs, the pin 10 is brought into an inclined position as shown in FIG. 6, since it cooperates with the inclined wall of the opening 14. Finally, an edge of the collar 23 comes to Abutment on the leg 4 in the vicinity of the opening 14, which prevents further tilting of the pen and tilting opposing force couple is generated. Upon further insertion of the pin 10, a resilient deformation of the Anchoring portion 14 brought about, and when the pin according to FIG. 7 has been completely inserted, is the entire edge of the collar 23 in contact with the adjacent surface of the leg 4, and the axis of the undeformed The main part of the pin again runs parallel to the axis of the brake disc.

In the above description, corresponding parts are in each case in the various exemplary embodiments denoted by the same reference numerals.

The pins according to the invention are easy to manufacture because they have no transverse bores, and they can easily be installed in disc brakes, as they do not need to be brought into a certain position for this purpose.

After being installed in a brake, the pins according to the invention are anchored in such a way that they are not opposite to the housing turn. It is therefore obvious that the pins according to the invention can also be used in other constructions in which a pin and another component are so fixed

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should be so that they cannot rotate relative to each other, and it is not necessary to use additional fastening device anywhere except for the pin and the owl part itself.

809813/0978

Claims (1)

: 1., disc brake for a vehicle, in which the tfremsschafenänungssysteme, the surfaces of a rotatable brake disc facing them work together, arranged in a housing are and at least one of the brake shoe assemblies in the housing against a relative movement is set in the radial direction by at least one axially extending retaining pin, thereby marked that the Ilaltestift (10) on one end has an anchoring portion (12) which cooperates with a first opening (14) in a first part (4) of the housing (3), as well as a reaction section, which is suitable to cooperate with a part of the housing so that when inserting the anchoring portion in the associated opening of the pin is forced to move axially and that a progressive resilient deformation of the anchoring portion in a direction to which one is perpendicular to the axis of the brake disc Component belongs, is brought about that the anchoring portion with the wall of the associated opening cooperates, the introduction of the anchoring portion into the opening for an anchoring engagement between the anchoring section and the wall of the opening leads. 2. Disc brake according to claim 1, characterized in that the anchoring section (12) and the one receiving it Opening (14) are inclined at different angles relative to the axis of the brake disc. 809813/0978 ORIGINAL INSPECTED 49 847 5. Disc brake according to claim 1 or 2, characterized in that the reaction section of the pin (10) cooperates with a second opening (13) which mates with the first opening in a second part (5) of the housing (?) is formed and which is separated by an axial distance from the first opening (4). 4. Disc brake according to claim 3, characterized in that the first part (4) and the second part (5) relative to one another are stationary parts of the housing (3). 5. Disc brake according to claim 3, characterized in that the first part and the second part of the housing as a relative mutually movable parts of the housing are formed, which are relative when the brake shoes wear move to each other. 6. Disc brake according to one of claims 3 to 5, characterized in that the openings (14, 13) in the first Part (4) or the second part (5) of the housing (3) are arranged coaxially and that the anchoring section (12) of the pin (10) is inclined against the main part of the pin. 7. Disc brake according to claim 6, characterized in that the first part (4) of the housing (3) has a shoulder (19) which protrudes inwardly opposite the first opening (14) in order to be connected to the anchoring section (12) of the pin (10) to work together at a point opposite the point of intervention is offset to the outside between the anchoring section and the opening. 8. Disc brake according to one of claims 3 to 5, characterized characterized in that the axis of the opening (14) in the first part (4) of the housing (3) against the axis of the opening (13) is inclined in the second part (5) of the housing. 9. Disc brake according to claim 8, characterized in that the anchoring portion (12) of the pin (10) has a 809813/0978 49 847 just an extension of the main part of the pen. 3 0. Disc brake according to claim 8, characterized in that the anchoring portion (12) of the otiftes (10) is inclined against the main part of the pin and that the angle of inclination of the anchoring portion from the angle of inclination of the opening (14) in the first part (4) of the Housing (3) differs. 13. Disc brake according to one of claims 3 to 10, characterized in that the pin (10) has a V.'iderlager on v / eist, which cooperates with the housing (3) to move the pin in the axial direction on the first part (4) to prevent the housing inevitably after inserting the pin into the brake. 12. Disc brake according to claim 11, characterized in that the pin (10) has a constant diameter over its entire length and at its end facing away from the anchoring portion (12) has a thickened head (11) which is one with the Forms outer surface of the second part (5) of the housing (o) cooperating abutment. 13. Disc brake according to claim 3.1, characterized in that the anchoring portion (12) has a portion of has a smaller diameter and that on the diameter graduation there is a shoulder (17) which forms the abutment and which is connected to the inner surface of the first part (4) of the housing (3) cooperates. 1Λ, disc brake according to claim 1 or 2, characterized in that the pin (10) is designed as a U-shaped component with legs (20, 21) separated by a transverse distance, that the anchoring section (12) is at the free end of one leg ( 20) is formed and that the other leg (21) forms the reaction section, which is in engagement with a second opening of the housing, which is separated on the same side of the brake disc by a circumferential section from the first opening (14). 809813/0978 49 847 15. Disc brake according to claim 1 or 2, characterized in that that the reaction portion of the pin (10) has an associated 3 and (23) of larger diameter which is adjacent to the anchoring portion (12) of the pin in order to during the insertion of the anchoring portion into the associated opening (14) with a surface of the first part (4) of the housing adjacent to this opening (3) to work together. 16. Connection arrangement with two components and a connecting device which connects the two components and prevents relative rotational movement of the components, wherein one of the components is in engagement with an opening of the Another component standing pin is characterized in that an anchoring engagement with the connecting device belong between an anchoring section at one end of the pen and the wall of the opening, into which the anchoring section is inserted, and that the pin has a reaction section which is suitable to cooperate with a part of the other component so that during the establishment of the engagement between the anchoring portion and the opening of the pin is forced to move axially so that by the cooperation of the Anchoring portion with the wall of the opening a progressive resilient deformation of the anchoring portion is brought about. 809813/0978