DE1949866A1 - Floating caliper disc brake - Google Patents

Description

The invention "relates to a disc brake of those Type in which a hydraulic actuator is suitable to directly attach a first friction pad assembly an adjacent face of a rotatable. To put on the washer and a second friction pad assembly to the opposite one Side of the disc over a yoke, which on or in a stationary (part in the direction parallel to The axis of the disc is slidably mounted »In particular, the invention relates to a yoke for use in a disc brake of the type described above

According to the invention, a Jooh for use in a disc brake of the type described above has a one-piece arrangement that extends over the stationary part and 'an area of the circumference! " the disc fits and two im Distance from each other, level, parallel guide

009836/1077

-2- "1 9-43866.

areas of "considerable radial depth to the. direct" operational Engagement with corresponding flat guide surfaces :, on opposite sides of the stationary Part has, wherein the guide surfaces on the yoke on at least two corresponding to each other. Ends opposite to each other Storage areas for engagement with the corresponding. Guide shoulders on the fixed part "

Preferably, the bearing surfaces are at right angles to the spaced-apart, flat, parallel ones Arranged guide surfaces »

The flat, parallel guide surfaces have the inner facing surfaces of a first pair im. Distance from each other: Approaches to both protrude in the same direction from the plane of the yoke, and a second pair of spaced apart ones parallel approaches that are in the same direction as that first pair protruding from the plane of the yoke, and outward are provided at a distance from each other, which is about the outer opposite ends of the lugs of the first pair, the lugs of the second Pair between spaced parallel planes that form the flat parallel guide surfaces of the approaches of the first pair are arranged and provided within the same, and wherein the facing each other inner surfaces of the approaches of the second pair of stop surfaces for engagement with the second friction pad assembly and form with the hydraulic actuator.

This has the advantage that the machining of the flat parallel guide surfaces and the stop surfaces in two separate operations can be done, in directions perpendicular to each other and without the approaches

009838/1077.

ORlGiNALlNSPECTSD

1943866

to disturb the other couple »

The first pair of approaches is circumferential opposite points at opposite points Sides of a central recess provided in the yoke, ' which receives the stationary part and a portion of the periphery of the disc, while the second pair of lugs axially opposite ends of the recess is arranged »

If the bearing surfaces are provided at the radially outermost ends of the parallel guide surfaces, extend they move towards each other, and when the bearing surfaces are at the radially innermost ends of the parallel guide surfaces are provided, they extend from one another; .. »· away in opposite. Directions ,,

In both embodiments, if the yoke built into a disc brake of the type described above is engaged with the bearing surfaces by resilient means acting between the yoke and the stationary fore pressed the corresponding shoulders on the stationary part

These resilient means may comprise springs which act between the yoke and the stationary part and the shape of a helically wound compression spring or a diaphragm. On the other hand, the resilient device can also comprise two tension springs that are attached to in the circumferential direction opposite ends of the Brake are arranged and between the yoke and the stationary Part of acting at points radially spaced from one another.

When the bearing surfaces are provided at the radially innermost and outermost ends of the parallel guide surfaces

009836/1077

ORIGINAL INSPECTSD

" ⁴ -" 194S86G

are _t . each pair of bearing surfaces extends towards each other, surrounds respective spaced-apart shoulders on arms on the stationary part and is slidably engaged therewith when the yoke is installed in a brake of the type described above-

The shoulders on the stationary part can be radially opposite ends of each arm or at radially opposite ends of each arm Approaches should be provided that differ from the poor extend outwards.

The invention and advantageous details of the invention are described below with reference to several drawings Exemplary embodiments explained in more detail »

1 is a side view of a disc brake;

FIG. 2 is a top plan view with a partial section along the axis of FIG. Brake actuator;

Pig »3 is a partial cut along the line 3-3 in Figure 2;

Fig. 4 is a partial section taken along line 4-4 in Fig. 2;

Fig. 5 is a side view of another disc brake;

FIG. 6 is a top plan view of that shown in FIG

Disc brake;

FIG. 7 is a section through that shown in FIG Disk brake along the axis of the brake; Fig. 8 is a. Section along the line 8-8, in Figo 7 »

Fig. 9 is a. Partial section similar to FIG. 8 shows however, a modified embodiment; '

Figure 10 is a view similar to Figure 3 shows , but a different disc brake;

Fig. 11 is a half-sectional view

• ^ 309636/1077 _0BIQINAU

1943866

the opposite end of the disc brake shown in. lig _O 10.

In the "shown in the figures 1 to 4 embodiment, a floating-caliper disc brake, a stationary part is BEZW. Mounted a support 10 on a stationary BEZW ₀ non-rotatable member at a side of a rotatable brake disc. 11 For the purpose of mounting the support has two spaced-apart · Located, inwardly protruding eyelets 12, which serve for fastening "receive screw bolts" The carrier, which is expediently designed as a cast or forged piece, comprises a hydraulic cylinder 13 "whose axis is essentially at right angles to the plane of the disk" This cylinder 13 is expediently designed as a bore in the carrier 10.

A floating saddle or a yoke 14 is attached to the carrier mounted movably in the direction parallel to the axis of the disc, which is preferably as a cast or forged piece is formed and has a central recess 15 which extends over the carrier and an area of the ITmfangs of the disc fits. A pair of opposed, inwardly protruding lugs 16 and 17 are axially attached to each other opposite ends of the recess 15 are provided, and another pair of inwardly protruding parallel lugs 18 is at circumferentially spaced locations on opposite sides of the Recess provided »In the surfaces facing each other, the projections 18 are machined so that two flat, parallel Guide surfaces 19 are formed with corresponding flat, parallel guide surfaces 20 on opposite one another Sides of the carrier 10 are slidingly engaged " The guide surfaces lead at their radially outer and upper ends 19 to flat bearing surfaces 21, which are essentially

0098 36/107 7

ORfGfNAL

194SSGG Λ ;. ; . - - 6 - ■■■■■. ■ - -

run perpendicular to the guide surfaces 19 »The surfaces 21 are in sliding engagement with corresponding shoulders 22 on the carrier, which continuously adjoin the guide surfaces 20. The guide surfaces 20 are axially separated by outer surfaces spaced from one another in the circumferential direction continued at a distance from each other situated parallel arms 25 which are made with the carrier in one piece and at the front er * · _s str.ecken However, shortly before the surface of the disk 11 in the vicinity of the support end of the same after · ,,

The mutually facing surfaces of the lugs 16 and 16 are machined so that parallel stop surfaces 24 are formed which extend at right angles to the flat, parallel guide surfaces 19 of the lugs 18 »·

'The opposite. Ends of the lugs 16 and 17 are inwardly spaced from the inner opposing parallel surfaces of the lugs 18 so that the machining of the guide surfaces 19, 21 and the stop surfaces 24 in two separate operations in relation to one another perpendicular directions can be made without interfering with the other approaches. -

A friction pad 25 for engaging that of the wearer 10 adjacent surface of the disc is rigid with a Support plate 26, which has parallel end edges, glued or otherwise attached to the same. The friction pad assembly comprising the friction pad 25 and the support plate 26 is toward and away from the disk by the sliding engagement of the end edges of the support plate 26 with corresponding guide surfaces 27 of considerable depth on the adjacent inner sides of the arms 23 movably guided

A friction cushion en 28 to engage with the opposite--: . 009836/107?

ORIGINAL INSPECTBD

194386G

lying surface of the brake disc 11 is with a rigid Support plate 29 glued or otherwise attached to the same fortified

The friction pad arrangement comprising this friction pad 28 and the support plate 29 is in the recess 15 arranged in the yoke, and with the support plate are the machined stop surfaces 24 of the adjacent approach 16 in engagement with the support plate by two removable Pin 29a connected 'is'. .-

The friction pad 25 is applied directly to the brake disc by a piston 30 working in the cylinder 13, while an opposing piston 31 acts on the yoke via the extension 17 to move the friction shoe 28 in Engages the opposite surface of the disc too bring when the piston through a coming from a master cylinder or another pressure medium source and pressure medium conducted between the pistons are separated.

The directly operated friction pad 25 is through the Engagement of an axially extending pin portion 33 on the outer end of the piston 30 in an opening 32 in the support plate 26 held against movement in the radial direction

The yoke 14- is similarly engaged a pin part 34 · at the outer end of the piston 31 into a Opening 17a in the approach 17. The held in its Itage Pin enteil 34 is at its inner end of an annular Surrounding pressure surface 35, which is in engagement with the bearing surface on the shoulder 17 to "a pressure force when braking to apply on the yoke.

A resilient annular plastic sleeve 34a 009836/1077

ORIGINAL INePECTSD

194S8GC

- 8 - , ■ ■ ■■■ ■■ '■■,

is arranged between the pin part 34 and the opening 17a and balances tolerance fluctuations between them "both parts,

When braking, the frictional force of the direct operated friction pad 25 increases depending on the direction of rotation of the disc received by one or the other of the arms 23 on the stationary support 10, while the frictional force of the Friction pad 28 is received via the yoke on the outer surface of the other arm.

The yoke 14 is constantly with the help of a compression spring 36, which fastened one in the carrier and through a axially slotted opening 38 in the yoke surrounds extending pin 37, resiliently * in engagement with shoulders 22 on Carrier 10 »The spring acts between corresponding retaining plates 39 and 40, of which the lower Plate 39 engages the bottom of a recess 38a in the yoke surrounding the opening 38, while the top plate of a snap ring or removable cotter pin 41, in their position is held, which with an externally on the holding plate 40 protruding part of the pin 37 in engagement stands ο ■ -. '

When the friction pads 25 and 28 are worn and need to be replaced, the pins 29a are removed, so that the friction pad 25 can be removed radially downward from the brake., After removing the split pin 41 the yoke 14 can be removed in the radial direction, after it has been moved axially so that the projection 17 came out of engagement with the pin portion 34 at the outer end of the piston 31. The friction pad 25 can be removed after pressing back the piston 30 * ■

In a modified embodiment example is 009836/1077

"19-4" S-SGC - 9 -

Pin 37 replaced by a headed pin, and one helical spring acts between the ground the recess surrounding the slotted opening 38 in the yoke 14 and the head of the pin.

In another construction, the yoke 14 engages the shoulder 22 with the aid of two tension springs held at! rager 10. These tension springs are on in the circumferential direction opposite ends of the brake are arranged and between pegs extending from the outer surfaces of the arms 23 extend outward on the carrier, and points on the yoke 14 »which lie radially outside the pin on the carrier, fortified

The exemplary embodiment shown in FIGS. 5 to 9 a floating caliper disc brake is similar to the embodiment shown in Figures 1 to 4, so that The same reference numerals are used for corresponding parts.

However, in this construction, the guide surfaces 19 on the carrier 10 lead at their radially innermost Ends to opposing outward and mutually aligned shoulders respectively. Levels 45 »with them machined edges 46 on the lowermost ends of the lugs on the yoke 14, the bearing surfaces form, slidingly engaged stand.

The yoke 14 is resilient by a resilient plate 47 inwardly into engagement with the shoulders or “steps 45 pressed on the carrier” As in FIGS. 7 and 8 As can be seen, the resilient plate 47 acts between the outside of the yoke 14 and the underside of the head 48 a Bchraubbolzenn 49, which οich slotted through the Opening 38 Lm yoke .ern.fcr-corner and in a, middle pre-op tion

0 0 9 8 3 6/107 7 oritimai ».»

original hmspectsd

- ¹⁰ - .- 194336C

50 screwed into the radially uppermost part of the carrier 10

is ο ■: ■. - ■: - ■■■ ·. .. - ..

In the modified embodiment according to ... Figure 9, the screw bolt includes a vent screw. for venting the hydraulic system and especially, the pressure space in the cylinder bore 13 between the pistons - ■ 30 and 31.

The modified embodiment shown in Figures 10 and 11 of a floating caliper brake is similar to the embodiment shown in Figures 1 to 4, so that the same reference numerals are used for parts that correspond to one another. In this embodiment, however, the resilient means 36 which press the yoke 14 into engagement with the shoulders 22 on the carrier are absent. Movement of the yoke 14 radially outwardly with respect to the carrier 10 is prevented by the sliding engagement of inner bearing surfaces 60 on inwardly directed extensions 61 on the lower ends of the lugs 18 of the yoke with guide surfaces 62 on the lower ends of the arms 23 am Carrier 10 ₀ The guide surfaces 62 run parallel to the shoulders 22, and the lugs 18 are in the form of ears which have parallel inner end surfaces which form the bearing surfaces 21 and 60.

In a modified embodiment, the Arms 23 longitudinally at intermediate points in alignment their radial extent outwardly, provided with parallel ends lugs with which the parallel inner bearing surfaces 2i 'and 60 can slide into engagement, one at the top and one at a distance from it lower wall of aligned recesses in form the ears of the lugs 18 on the yoke,

In the case of the aui! J * ührungsbo.u; game according to Figures 10 and 11 "■ .., ■ · ■ .009830 / 1077" ^:

ORlGfNALINSPECTSO

19408CG

and the modification described above do not need resilient means for holding the yoke in its position on the stationary part provided to be _0. This is advantageous over the above in connection with Figures 1 to 9 described constructions in which a failure of the compliant means during operation can lead to the fact that the yoke is detached from the stationary part.

In all of the embodiments described above, in which the yoke 14 is made from a casting, this is expediently hollow, so that the weight of the entire disc brake is reduced to a minimum »

In all of the embodiments described above, wear devices, for example in the form of Wear-resistant strips can be arranged between the guide surfaces 19 and 20, which are complementary to one another.

Claims

00 9 836/10 77 _{Λ Α}

ORIGINAL

Claims (1)

Godparents ta η s ρ r- ü ο he 1 οy floating caliper disc brake of the type in which a hydraulic actuator connects a first friction pad assembly directly to an adjacent surface a rotatable disc and a second friction ski rope assembly on the opposite surface of the disk via a yoke which is attached to or in a stationary part is mounted slidably movable in a direction parallel to the axis of the disc, characterized in that the yoke (14) is designed as a one-piece arrangement over the stationary part (10) and a region of the circumference the disc (11). fits and a pair at a distance from each other located, flat, parallel guide surfaces of quite radial depth for direct operational engagement with corresponding flat guide surfaces on opposite sides Having sides of the stationary part, the guide surfaces on the yoke at least on two corresponding ones Ends to opposing bearing surfaces for engagement lead with appropriate shoulders on the stationary part, 2p floating caliper disc brake according to claim 1, characterized g e k e η η ζ e i c h n, e t that the bearing surfaces are at right angles are arranged to the guide surfaces. 3ο Sohwima caliper disc brake according to claim 1 or 2, g e k: e η η ζ e ic h η e t by a first pair in the 009836/107 7 ORlQiNAL] NSPECTiD 1943866 -β stood, mutually located, parallel approaches, both protrude from the plane of the yoke away in the same direction and the inner, mutually facing surfaces of which have the flat parallel guide surfaces, and by a second Pair of spaced parallel lugs running in the same direction as the first "pair of the Protruding plane of the yoke and outwardly at a distance from one another beyond the outer opposite one another Ends ^ of the lugs of the first pair are provided, wherein the lugs of the second pair between spaced-apart parallel planes that form the planar parallel Guide surfaces of the approaches of the first pair contain ^ arranged and are provided within the same and wherein the facing inner surfaces of the lugs of the A pair of abutment surfaces for engagement with the second friction pad assembly and form with the hydraulic actuator «, 4. floating caliper disc brake according to claim 3, characterized in that the first pair of lugs is provided at circumferentially spaced locations on opposite sides of a central recess in the yoke which receives the fixed part and a region of the circumference of the disc, and that the second pair of lugs is arranged at axially opposite ends of the recess _o 5. Floating caliper disc brake according to one of the preceding claims, characterized in that the bearing surfaces are arranged at the radially outermost ends of the parallel guide surfaces and extend in the direction of one another. 6. floating caliper disc brake according to one of claims 1 to 4, characterized in that 009836/107 7 _Λ ORIGINAL INSPECTED 1943 p 6 c that the bearing surfaces at the radially innermost ends of the parallel Ileitungsflächen are provided and · from each other extend away in opposite directions 7ο. Floating caliper disc brake according to one of the preceding Claims, characterized in that that the bearing surfaces by resilient means which act between the yoke and the stationary part, with corresponding Shoulders on the stationary part are pressed into engagement ο 8. floating caliper disc brake according to claim 7, characterized in that the resilient Means have a helically wound compression spring (36), 9. "floating caliper disc brake according to claim 8, characterized in that the compression spring cooperates with the outer end of a pin (37) which is fixed in the stationary part (10) and itself extends radially outward through an axially slotted opening (38) in the yoke (14)., 10 ο floating caliper disc brake according to claim 9. » characterized in that the compression spring 'between holding plates provided at a distance from one another (39 »40) acts, of which the lower plate (39) with the bottom of a recess (38a) surrounding the opening (38) engages in the yoke (14), and the top plate (40) on a snap ring (41) rests on the pin in the Near its outer end protruding over the yoke is attached. 11. Sohwimms caliper disc brake according to claim 9, characterized in that g θ k e η m ζ ei without t that the compression spring , - .. .-. ■ - - 009836/1077 OR / GfNAL INSPECTED 194S86C between the bottom of a recess surrounding the opening and the head of a pin fixed in the stationary part acts, which protrudes through the opening and its head above. half of the yoke is arranged. 12ο floating caliper disc brake according to claim 7 »characterized ₉ characterized in that the resilient means comprise two tension springs which are disposed at opposite circumferential ends of the brake and located between the yoke and the fixed part at radially spaced from each other! Act points <> 13 · Floating caliper disc brake according to claim 7 » characterized by the fact that the yielding Means a resilient plate (47) which between the yoke (14) and the head of a in the fixed part by an axially extending opening (38) screwed into the yoke Bolt (49) worked 14 * floating caliper disc brake according to claim 13 »characterized in that the screw bolt (49) has a screw (51) through which at least the pressure space in a cylinder bore (13) is between each other opposite pistons (30, 31) »which form the hydraulic actuating device, can be vented 15. Floating caliper disc brake according to one of the claims 1 to 4 »characterized in that the bearing surfaces at the radially innermost and outermost ends the parallel guide surfaces are arranged, and that each pair of bearing surfaces is suitable, corresponding, im Distance shoulders on arms on the stationary part to surround and to make a sliding engagement with the same. 16 "floating caliper disc brake according to claim 15, 00 98 36/1077 ORIGINAL INSPECTBD 194386C 4b through this. gezeichen.net that every couple spaced-apart bearing surfaces corresponding shoulders on arms that are spaced apart from one another surrounds on the stationary part and slidably engages with the same. 17. floating caliper disc brake according to claim 16, characterized in e. η n ζ eich η et that the shoulders are provided on the stationary part at radially opposite ends 3 ed it arm. 18o floating caliper disc brake according to claim 16, characterized in that geke η η. ζ eic h. η et that the shoulders on the stationary part are provided at radially opposite ends of opposite lugs which extend outward from the arms «, 19 · Floating caliper disc brake according to one of Claims 1 to 6 or 15 »characterized in that the yoke is made from a hollow casting ₉ 20. Floating caliper disc brake according to one of the Claims 7 to 14 "or 16 to 18, characterized in that g e k e η η ζ e i c h η e t that wear-resistant devices between the parallel spaced apart Guide surfaces are arranged on the yoke and the corresponding guide surfaces on the stationary part » 21 ο floating caliper disc brake according to one of the Claims 7 to 14 »16 to 18 or 20, characterized in that g e k e η η. draws ;, that the hydraulic actuation device- -.-. device comprises two opposing pistons (3Q, 31) in a Working cylinder bore (13) in the stationary part (10), and one of which (31) directly on an inwardly protruding one Approach (17) on the yoke (14) acts around the yoke in such a way to move that second friction pad assembly 009836/1077 ORIGINAL INiSPECTSO 1949860 (28, 29) is applied to the disc (11), this Piston has a pin part (34th) which is arranged in an opening (17a) in the inwardly projecting extension and a resilient annular sleeve (34a) therebetween the opening and the journal part is arranged, the tolerance fluctuations balances between the pin part and the opening «, . 22. floating caliper disc brake according to claim 21, characterized in that, that the resilient Sleeve is made from a plastic. ORIGINAL 1NSPECTB0 0098 36/107 7