JPS5958239A - Disk brake caliper and its manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to brake calipers in general, and in particular to floating calipers. The present invention relates to a brake caliper for a cut-type vehicle disc brake and a method for manufacturing the same.

A variety of spot-type disc brake structures are known that use a brake caliper that transmits force from one shaft side of a brake disc to the other shaft side. Disc brakes of this type typically include two brake shoes, each located on one of the two axial sides of the brake disc. The brake shoe is attached to either the conveying member or the caliper, or between the conveying member and the carrier/base so that it can be moved both toward the brake disk and away from the brake disk on the shaft. When there is no brake operation,
While the brake disc rotates freely around its axis corresponding to the vehicle and at the same angular velocity as this vehicle, the conveying member and the gear IJ iR mounted thereon are prevented from rotating around said axis. As a result, during braking, the axially opposite collar brake shoe comes into frictional engagement with the brake disc, and the rotational speed of the brake disc decreases, eventually stopping the rotation.

Movement of the brake shoe towards and away from the brake disc can be achieved in a variety of ways. Generally, at least one hydraulically actuated vehicle brake actuating cylinder piston unit (U7heelbrake actuating c
ylinder-and-plston unit)
This can be achieved by using

In a 70-carrying delta type disc brake, the carrying member is mounted on a conveying member that is movable in opposite directions substantially parallel to the axial direction of the disc. This floatingly mounted caliper engages the brake shoe with the brake shoe installed on the opposite side of the brake disc.
nt).

In order to accomplish the transmission of this force, the vehicle brake operation cylinder and the cylinder of the piston unit are equipped with a gear IJ p4.
are rigidly fixed to and generally formed integrally so that they can move together.

9- Once the internal pressure of the cylinder and piston unit exceeds the level necessary to overcome the frictional force (・C) within this unit, the cylinder will act directly against the brake shoe located on the same side of the brake disc as the above unit. The working piston is slidably fitted.The pressurized medium in the working ring and the piston unit then exerts a reaction force on the ring equal to but opposite in direction to the force on the piston.This reaction e to the brake shoe installed on the opposite side of the brake disc.

Floating mounting of the caliper on the carrier member may be accomplished in other ways.

For example, by providing axially extending cooperating guide surfaces on the caliper and the conveying member, or by using guide pins that are rigidly connected to one end of the caliper and the conveying member and guided through respective holes at the other end. . In any case, a cali-no-7 with a precision surface is always required. That is, a carriage is required with a surface that is machined or otherwise formed to conform to specifications such as dimensions, tolerances, smoothness, and/or adhesion.

In floating carrier spot type vehicle disc brakes, the gear IJA' is generally made of cast iron, which is known to have a certain degree of strength and is relatively inexpensive. A caliper is generally formed integrally with a brake operating cylinder for a vehicle and a cylinder of a piston unit. However, the need to machine various precision surfaces on various parts of the composite caliper that combines the caliper itself and the cylinder requires capital investment and skilled labor to be able to perform such machining. In terms of costs, this leads to an increase in the manufacturing cost of the composite caliper. Composite carry/thousand manufactured die-cast operations (
In a die-casting operation, a precise surface cannot be obtained due to the reduction and distortion of the composite carino 4.

The purpose of the invention is to avoid the disadvantages of the prior art.

In particular, it is an object of the present invention to provide a composite brake caliper which does not have the disadvantages of conventional brake calipers.
An object of the present invention is to provide a brake caliper i+ for use in a spot type vehicle disc brake.

Yet another object of the invention is to assemble a brake carrier i9 of the type described above while minimizing the required machining.

OBJECTS OF THE INVENTION (17j) It is also an object of the present invention to design the brake caliper of the tights described above in such a way that reliable machining can be carried out in a convenient and inexpensive manner.

An object of the present invention is to provide a brake caliper that has a simple structure, can be manufactured at low cost, and has high operational reliability.

The purpose of this invention is to provide a method for manufacturing the above-mentioned type of brake carino that can reduce the manufacturing cost of the brake carino and increase the quantity without sacrificing the hardness (tiffness). .

The above objects and other objects hereinafter described include: a support member comprising a rigid first material and having a support portion defining a recess;
a separate working cylinder comprising a second material and having a mounting section that is received in a recess in the support member; a third material that is moldable and at least partially covering the support member; One is accomplished by providing a disc brake caliper with a disc brake caliper. 1st. Second. It is more effective to use a different material as the third material. For example, the supporting member may be made of iron, in particular cast iron, the brake actuating cylinder may be made of steel,
Aluminum, especially castable aluminum, can be used as a moldable body.
um). The moldable body advantageously includes at least one precisely cast contact surface. This is even more effective when the brake actuation cylinder has at least one precisely machined surface.

A particular advantage of the above-described arrangement is that the number and complexity of machining can be reduced by having at least one precisely cast surface. Where machining is significantly reduced. By providing a cast body, for example made of aluminum, and a separating cylinder, for example made of steel, all of the precision-machined surfaces can be placed on the body, or on such bodies, or on the separating cylinder. As a result, the manufacture of composite calipers is considerably simplified compared to, for example, conventional brake calipers. This is particularly advantageous when machining that leaves a precise surface on the separation cylinder is performed prior to assembly of the caliper.

An advantageous construction of the disc brake caliper 4 according to the invention is obtained when said body at least externally engages at least the support part of said support member. In such a configuration, all of the circumferentially defined precision surfaces that previously had to be machined onto the cast iron caliper can be precision cast onto the body. However, within the area of the four parts, the mounting of the cylinder covers the support part of the support member and, in the assembled state of the carrier/4', the precisely cast internal contact surface where it contacts the part. It is valid when the body has . As a result of such measures, there is no need to machine the surface of the support part of the support member that defines the recess, or to install the cylinder in the recess to ensure a suitable fit of the part. . Rather, the precisely cast inner circumferential surface of the body provides a close fit, such as static fit, to the cylinder installation section.

A further advantage of the present invention is that at least the mounting portion of the cylinder has a cylindrical outer periphery, and the support portion of the support member is configured such that the recess is formed by the support portion as a cylindrical opening. The circumference is a complete ring. Such a configuration has the advantage that the cylinder is safely held within the four parts so as not to move in the radial direction even if a radial force is applied to the cylinder.

More advantageously, the seven-cylinder cylinder has at least one abutment section in the mounting section. This abutment extends outwardly beyond the circumference of the cylinder and abuts the support portion of the support member when the cylinder is installed and fully seated in the cylindrical opening of the support member. Even in a configuration where the support part of the support member and the body form a composite body, the cylinder must be installed so that the part is completely received in the recess when the abutment part comes into contact with the composite body. is also valid.

In such a configuration, the abutment prevents the cylinder from moving in at least one axial direction in response to an axial force acting thereon.

The support portion of the support member extends along a partially annular trajectory such that the recess has a generally radially widening opening. in this case,? f4 fits at least both the mounting part of the cylinder and the support part of the support member around the opening of the recess. This opening configuration of the recess simplifies assembly of the cylinder with the support member. However, the costs of using aluminum as compared to cast iron are greater, and the increase in material costs will outweigh any savings in manufacturing costs. As a result, a detailed cost analysis will be required, taking into account the number of calipers to be produced, before deciding whether to use an open recess configuration or a closed four-part configuration.

Disc brake carrier A of this invention? The support member has at least one erected portion extending substantially parallel to the axial direction of the cylinder at a position radially away from the axis of the cylinder which is received in the recess. The construction portion has a free end portion axially spaced from the support portion and a brake shoe operating portion fixed to the free end portion and extending substantially perpendicularly in the axial direction with respect to the axis of the cylinder. Then, a die or separate body made of moldable material as described above at least partially accommodates the brake shoe operating portion. Here, the body 17 is made of moldable material and has at least one precisely cast surface in a manner similar to that previously described. This eliminates the need to machine such precision surfaces on the working part. This precisely cast surface is, for example, a surface that defines an opening in the cast body in the operating section.

In accordance with another advantageous aspect of the invention, a method of manufacturing a disc brake caliper, particularly a floating caliper spot type vehicle disc brake caliper, is provided. This manufacturing method includes a step of forming a support member that has a support portion defining a recess, and a step of forming a support member made of a hard metal material, and an insertion step of inserting a part into four parts to install a separation action cylinder made of a second material. and a molding step of molding at least one body of a moldable third metallic material over at least the support member such that the body at least partially overlies the support member. In this molding process, at least = 1
8- Both have one precision surface formed or at least one precision opening formed in the body.

Furthermore, the manufacturing method of the invention comprises the step of forming at least one precision surface on the cylinder, in particular achieving this by machining.

It is particularly advantageous when the step of providing at least one precision surface on the cylinder is carried out before the installation of the separate brake actuation cylinder in the recess is inserted. A special advantage of this method is that a zipper or similar holding bag [ii
By easily holding the cylinder in the holding device and achieving substantially relative and uniform movement between the cylinder and the machining tool, it is possible to easily hold the cylinder on the outer circumference, inner circumference or any end surface of the cylinder. However, machining is easy and a simple cylindrical shape can be obtained. There is no need to take any special measures regarding tools or holding devices. Especially since the cylinder is machined separately from the carry IJ no. There are no special restrictions on the movement or installation of the tool with respect to the cylinder.

This method is particularly effective when the molding step is accomplished before the inserting step. Under these circumstances, the previously machined precision surfaces may become distorted during the molding process due to heat transferred through the support between the moldable material and the separation cylinder. There is no danger of being caught. The method also includes - in the assembled state of the device, the mounting of the cylinder is carried out by inserting a die 7 made of moldable material into the interior of the four parts with a contact surface that contacts the parts with the required degree of tightness. “to make it possible to give.”

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

First, in FIG. 1, reference numeral 1 designates a support member for a disc brake gully/mother of the present invention.

The support member 1 shown in FIG. 1 is annular and completely circumferential support 11. The free end 13 includes a bridge section 12 extending generally in the axial direction of the cylinder, and a brake shoe operating section 14 extending radially inward.

Generally, a disc brake caliper straddles the brake disc. As a result, the support part 1) is located on one axial side of the brake disc, the free end 13 and the brake shoe operating part 14 are located on the other axial side of the brake disc, and the erected part 12 is located on the other axial side of the brake disc. Extends radially outward beyond the disc.

The support portion 11 has an inner circumferential surface 15 . This inner circumferential surface 15 defines the shape of a circular recess or through hole in the support portion 11 . The wheel brake actuating cylinder 2 is partially positioned inside the support 11 . As shown in FIG. 1, the support part 1 is fitted into a body 3 made of a moldable material. The di 3 has an outer peripheral portion 31. This outer circumferential portion 3 covers the outer circumference of the support portion 11. Further, the body 3 has an inner peripheral portion 32. This inner peripheral part 3
2 covers the inner circumferential surface 15 of the support portion 31. Furthermore, body 3
has an inner circumferential surface 33 which has been molded or cast in advance. The inner peripheral portion 32 of the body 3 supports the cylinder 2 within the through hole of the support portion 11 of the support member 1.

The cylinder 2 has a mounting portion 2J which is held in the through hole of the support portion 1. Further, the cylinder 2 has an outer circumferential surface 22 that is in contact with an inner circumferential surface 33 of an inner circumferential portion 32 of the body 3 . The inner circumferential surface 33 and the outer circumferential surface 22 are dimensioned relative to each other so as to achieve a static fit as much as possible. As a result, the installation of cylinder 2 is done once in section 21? When inserted into the inner circumference 32 of the body 3, even if the composite brake caliper vibrates or is subjected to other forces during transportation, assembly, or use, it can be safely inserted into the inner circumference of the body 3. Retained.

However, the precast inner circumferential surface 33 of the inner circumferential portion 32 of the die 3 has such properties that no machining is required, especially in terms of fidelity to the required diameter and surface smoothness. I will explain this in connection above. It would be impossible to provide such characteristics to the inner circumferential surface 15 of the support portion 11 of the support member 1. This is particularly because the support member 1 is generally made of cast iron in order to obtain the desired strength. The fact that the support part 1 is made of cast iron means that the inner circumferential surface 15 of the support part 11, at least in parts, is necessarily very rough and almost deviates from the desired diameter. As a result, it is necessary to machine this inner circumferential surface 15 before it can be adapted to the mounting part 2 of the cylinder 2.

Not only can the cylinder 2 be manufactured relatively inexpensively, but also the outer circumferential surface including the outer circumferential surface 22 of the portion 2I can be installed in a number of locations. Deep-drawing has the advantage of having a predetermined desired diameter and surface smoothness required for cooperation or close contact with the inner circumferential surface 33 of the die 3.
ing opera-tion).

The cylinder 2 has an internal pressurized chamber whose outer periphery is defined by an inner circumferential surface 24 . This inner circumferential surface 24 at least partially encloses (slids) the operating piston inserted into the cylinder 2 in the assembled state of the disc brake.
ing contact). The actuating piston receives pressurized liquid.
When the fluid is supplied to the internal pressurizing chamber of the cylinder 2, it acts directly on the brake shoes of the wheel brakes provided on the same shaft side of the support part 11 and the cylinder 2 and the brake disc as before. pressurized medium.

In general, brake fluid (hydraulic brake
fluid) also acts on the bottom wall of cylinder 2.

As a result, a reaction force is applied to the bottom wall of the cylinder, which is transmitted via the support member 1 to the brake shoe provided on the opposite side of the cylinder 2 with respect to the brake disc.

Annular groove 25
is machined inside the cylinder 2, preferably at the abutment 23. This sealing annular groove 25 conventionally serves as a sealing element joining the interface between the inner circumferential surface 24 of the cylinder 2 and the outer circumferential surface of the working piston.
ment). A dust collection recess 26 having a diameter larger than the diameter of the inner circumferential surface 24 is formed on the long surface 2 of the cylinder 2.
It extends to 7.

In the assembled state, this dust containment recess 26 partially accommodates a dust boot of conventional construction extending between the working piston, the outer circumferential surface and the cylinder 2, and prevents dust and other environmental contaminants from moving into the working piston. Preventing reaching the interface between the bottle and cylinder 2.

The surfaces defining the dust containment recess 26 and the long surfaces 27 are machined and beveled so that there are no sharp points or corners. This is because if there are sharp points or corners, the dust boot is made of rubber elastic material and will be damaged by the sharp points or corners. The cylinder 2 thus has multiple faces that must be pre-machined. however,
Cylinder 2 is a separate component from the rest of the disc brake caliper and has a symmetrical shape when rotated about the axis, and its surfaces are likewise symmetrical about the axis, so the above Machining can be accomplished easily≠.

As a result, minimal additional expenditure is required for machining surfaces such as those described above. Therefore, such machining is preferably carried out before the cylinder 2 is assembled with the rest of the sliding brake caliper.

Further, in the assembled state, the cylinder 2 has a protrusion on its peripheral surface extending from the brake shoe operating portion 14.
tion) 2B. This projection 28 is integrally connected to the cylinder 2.

As shown, the projection 28 is a separate part connected to the cup-shaped main part of the cylinder 2, for example by welding. This is because the main part of cylinder 2 is pressed (d) as described in mJ.
It is particularly effective when the

A screw hole 29 is formed in the projection 28 and in the bottom wall of the main part of the cylinder 2. The aforementioned pressurized medium is supplied to the internal pressurizing chamber of the cylinder 2 via this threaded hole 29 after a connecting hose or similar conduit is connected to the projection 28 . It is preferable to connect the protrusion 28 to a connecting hose or conduit by forming a threaded portion on the hose or conduit and screwing this into the screw hole 29.

26- The protrusion 28 generally has a protuberance 28a whose surface is flat when viewed in the direction of the plane of the drawing. As shown in FIG.
has a radius greater than 9. This ridge 28B and its flat surface ensure that the connecting hose or conduit is seated precisely in one predetermined location on the projection 28.

The brake shoe operating portion 14 of the support member 1 has a through hole J6 therein. The other disc 3' (separated from the body 3 and made of pre-molded material) at least partially accommodates the brake shoe operating part 14.

As shown, the body 3' covers the brake shoe operating section 14 from the outside and terminates at a free end J6, as does the inner peripheral section 35 that covers the surface defining the through hole J6 in the brake shoe operating section 14. It has an outer peripheral portion 34 . The inner peripheral portion 35 is also precisely cast. As a result, unlike brake carriers and bases of conventional construction, it is no longer necessary to machine the surface of the brake shoe operating portion 14 facing the inner peripheral surface defining the brake shoe and the through hole 16.

Next, FIG. 2 will be explained. The figure shows a part of Purdy 3.3'
The support member l is shown before it is fitted.

From the figure, the construction part 12 has two bridge-shaped arms 12a and 12b extending parallel to each other between the support part 11 and the free end part 13. Tanibashi arm 12a.

12b has ribs 77 & or J
7b. These ribs 17h and 17b also extend substantially flat in the axial direction. Support part 11° Bridge-shaped arms 12a, 12
b, and the free end 13 has an opening in which the brake disc is partially potted. This opening makes it possible to arrange the brake caliper close to the axis of rotation of the brake disc, the brake disc being arranged in such an opening.

As shown in FIG. 3, the brake shoe operating section 14 is
It has two sections 14a and 14bf. These sections 14m, 14b are arranged symmetrically on opposite sides with respect to the axial diameter of the y'isk brake caliper. These two sections 14h, 14b each have two openings 16m corresponding to the opening 16 described in FIG.

16b. Furthermore, the support portion 11 of the support member J is annular.

As shown in FIG. 4, the body 3 extends over the entire support 11 both internally and externally. As a result, the ribs 17m and 17b are also covered by the body 3 over at least the range of the support portion 11. body 3
The window part (apertu) has been processed with even more precision.
re ) 37 a.

The two fixtures defining section 37b are section 36a.

36b. The windows 37a, 37b are used to mount the composite brake caliper on the axially moving conveyor member. This installation extends parallel to the axial direction and the window part 3
This can be achieved conventionally by providing the conveying member with two guide rods passing through 7h and 37b. The surfaces defining the window portions 37g and 37b of the portions 36h and 36b are precisely cast, so that each 29-window portion 3ya and 37b (required for installing the guide rod of the (The diameter is broken. Furthermore, - VC1 guide rod and window part 37a, ,?7
Since a rubber elastic intermediate fitting tube is interposed between the surface defining the window 37a and the surface defining the window 37a.

A good fit between the 37b and the guide surface is obtained, and the casting force is 11 mm. Furthermore, there is no need for further machining or chamfering of the upper surface.

In Fig. 4, there is a protrusion 28 and a flat surface? Arousal area 2 with
8a is shown in Rating Oil 1. Although it may be necessary to machine the surface around the threaded hole 29, this machining may be done at the same time as the threaded hole 29 is formed, for example, and is small.
Menkaku was able to accomplish this Φ.

Body 3 is! : Two tub-oriented protrusions 38a.

It has 38b. These protrusions 3ga and 3FIb are used particularly during assembly work of brake calipers and disc brake structures. That is, it is used to support a composite brake carrier i4 on a conveyor that transports playing bows, galipers, and disc brake wheels 30 from one assembly station to another.

FIG. 5 shows a modification of the combination structure of the operating cylinder 2 and the support member 1. In FIG. 5, the same parts as those in FIGS. 1 to 4 are given the same reference numerals to facilitate comparison on the drawings, although there are slight modifications.

The support member 1 shown in FIG. 5 has an incomplete circumference (imcomp
1), it has a support part 11' that is different from the support part 1. That is, the supporting parts 11 and 1
1' in that the support part 11' extends only along a substantially circular section.

The operating cylinder 2 is located at the abutment section (abutment por) mentioned above.
tion) 23, the abutment part 23a'
.

23b'. When the cylinder 2 and the support member 1 are combined, the abutment part 23b' is inserted into the recess 18 of the support part 11'.
interlock with each other. In such a configuration, the installation part 2 is fixed in the support part 11', and the body 3 is fixed in the support part 11'.
The mounting is provided in an open recess defined by a circumferentially incomplete support 11' to hold part 2. Before assembling the cylinder 2, attach the body 3 to the support part 11'.
However, it is generally preferable to fit the part 2 and the support part 11' into the body 3 after assembly.

Opening 1 in brake shoe operating parts 14a, 14b
6 a' and 16 b' are in the form of open grooves as shown in FIG. This facilitates manufacturing during the casting process of the support member 1. On the other hand, since the sections 14th and 14b are fitted into the body 3' during the manufacturing operation of the composite brake caliper, in any case the openings which are particularly required are the inner periphery of the body 3' as described in FIG. Part 35
Since the openings 16a', 16
The opening shape of b' does not give any disadvantage to the structure of the composite brake caliper.

A support portion 11' and a brake shoe operating portion 14a.

Rather than fitting only 14b into two separate bodies 3, 3', the entire support member 1 may be fitted in one continuous hole 3. This configuration is shown in detail in FIG. 6 with some improvements. As shown in the figure, the body 3 has a part 37 into which the construction part 12 is fitted, and a part 37 which connects the support part lJ', the part into which the installation part 2 is fitted, and the part into which the brake shoe operating part 14 is fitted.
has. Further, the body 3 has a portion 30 into which both the outer circumferential surface of the cylinder 2 and its bottom wall are fitted from the outside. The portion 30 is formed to have a protrusion 38 with a raised portion 38&, and a screw hole 39 is precisely cast in a position relative to the raised portion 38a so as to be in line with the screw hole 29 of the cylinder 2. . Therefore, no machining or the like is required for the protrusion 38.

In FIG. 6, the cylinder 2 is pressed (deep-d).
rawing operation) and, if necessary, an annular groove (annual groove) on its b circumferential surface 24.
lar 5eal groove) is simply machined in 25 sections. The threaded holes 29 can be formed during the pressing or in one subsequent step.

-33 = In Fig. 6, the abutment part of the cylinder 2 is 23 pieces II ring shape 1
% = 25 including the dust collection recess (dust-boot
recess) does not include 26 numbers. In Fig. 6, a dust collection recess is formed in a portion 37 of the body 3, as indicated by reference numeral 37a. According to such a structure, since the surface defining the outer periphery of the dust-containing recess 37a is carefully machined during formation of the body 3, it is not necessary to perform machining on this surface as well.

Generally, the support member is made of hard cast nodular iron.
Preferably, it is made of. In addition, the cylinder 2 can be press-worked or deep stamped.
) is preferably made of alloyed steel. moreover,
Preferably, the diode 3 is made of aluminum.

However, even if materials and alloys other than the above-mentioned materials are used, the requirements desired for them, such as structural strength for the material for the support member 1 and resistance to internal pressure for the material for the cylinder 2, are met. 3 if you have the ability and can easily create a shape.
4- and y+? As long as the materials for D3A') or 3.3' meet the requirements such as the possibility of zero molding, and as long as these materials are compatible with each other,
That is, the materials have been obtained in such a way that they can withstand the stresses experienced during operation of the composite brake caliper without damage, are suitable for this purpose and meet the above requirements. .

The above-mentioned embodiments are merely for explaining the present invention, and do not limit the present invention in any way, and all modifications and modifications within the technical scope of the present invention are also included in the present invention. Needless to say, it will be done.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view along the axial direction of the disc brake caliper of the present invention, Fig. 2 is a plan view of a support member used in the disc brake caliper shown in Fig. 1, and Fig. 3 is a view of the support member shown in Fig. 2. Figure 4 is a front view showing the end face when viewed in the direction of arrow B in Figure 4. Figure 4 is a front view showing the end face when viewed in the direction of arrow B in Figure 1. Figure 5 is a front view showing the end face when viewed in the direction of arrow B in Figure 1. FIG. 6 is an exploded perspective view of the combination of cylinders. FIG. 6 is a cross-sectional view of the combination of the support member and operating cylinder shown in FIG. 5 taken in the axial direction. DESCRIPTION OF SYMBOLS 1... Supporting member, 1... Supporting part, 12... Erection part, 13... Free end part, 14... Brake shoe operation part, 15... Inner peripheral surface, 2...・Wheel brake h explosion cylinder, 21... installation part, 22... outer peripheral surface, 3
... is D, 31...outer periphery, 32...inner periphery,
33... Inner circumferential surface, 23... Abutment portion, 24... Inner circumferential surface, 25... Sealing ring groove, 26... Dust collection recess, 2
7...Long side, 28...Protrusion, 29...Screw hole, 28
a...Protuberance, 16...Through hole, 3'...Body, 35...Inner periphery, 34...Outer periphery, 12h...
Bridge arm, 12b... Bridge arm, 17a. 17b...rib, 14m, 14b...section,
16a, 16b-opening, 36a, 36
b - Installation part, 37 a, , 97 b - Window part, 38a. , 98 b--Protrusion, 11'--Support part, 2.9
a'. 2,? b'--joint, 14 a, 14
b-Brake shoe operating section, 16a', 16b'・
...Opening, 37...part 1. ? 7a...Dust collection recess, 18...Recess, 30...Part. Applicant's agent Patent attorney Takehiko Suzue 37-

Claims (9)

[Claims] (1) a support member made of a hard first material and having a support part that settles the recess; and a support member made of a second material and having a mounting part that is fixed in the recess of the support member; A disc brake caliper comprising: a separate brake actuation cylinder; and at least one body made of a moldable third material and at least partially covering the support member. (2) The above-mentioned No. 1, No. 2. Disc brake caliper according to claim 1, characterized in that the third material is a different modern material. (3) The disc brake caliper according to claim 2, wherein the first material is iron. (4) The disc brake carino according to claim 2, wherein the first material is cast iron. (5) The disc brake caliper arm according to claim 2, wherein the second material is steel. (6) The disc brake caliper according to claim 2, wherein the third material is aluminum. (7) The disc brake carino according to claim 2, wherein the third material is castable aluminum aluminum. (8) The disc brake caliper base according to claim 7, wherein the body has at least one precisely cast contact surface. (9) A disc brake caliper according to claim 1, wherein the front h-pi separation brake operating cylinder has at least one precisely machined surface. (](it) The disc brake carino according to claim 1, wherein the body fits at least the support portion of the support member at least at the outer circumference. 01) The body is within the range of the four parts. Claim 1O, characterized in that the cylinder has a part that covers the support part of the support member, and the cylinder has an internal contact surface that is precisely cast and comes into contact with the part.
Disc brake carino as described in section. 0→ Claim 11, wherein the internal contact surface is in contact with the mounting portion. . αJ At least the mounting portion of the cylinder has a cylindrical outer periphery, and the support portion of the support member has a complete periphery such that the recess is formed by the support portion as a cylindrical opening. The disc brake caliper according to claim 1, wherein the disc brake caliper has an annular shape. 04 The cylinder has at least one abutment in the mounting portion extending outwardly beyond the circumference of the cylinder, the abutment portion being such that the mounting portion of the cylinder is completely recessed into the recess. 2. The disc brake car nose according to claim 1, wherein when the receiver is stopped, it comes into contact with the initial combination of the body and the support portion of the support member. α0 The support portion of the support member partially extends in an annular shape such that the recess has an opening that expands in a substantially radial direction, and the body is provided with at least mj cylinder installations in and around the opening of the recess. The disc brake caliper according to claim 1, wherein both the part and the support part of the support member are fitted into the disc brake caliper. The support member extends substantially parallel to the axial direction of the cylinder from the support part at a position radially bent from the axis of the cylinder which is supported by the four parts, and extends in the axial direction from the support part. at least one erected part having a free end at a position spaced apart from the axial direction; and a brake shoe operating part fixed to the free end of the erected part and extending toward the axial direction and substantially perpendicular to the axial direction. Disc brake carrier 1R0 0η according to claim 1, wherein the body is configured to at least partially fit the brake shoe operating part. The body is precisely molded. A disc brake caliper as claimed in claim 1, characterized in that it has at least one opening. 0 barrel A support member forming step of forming a support member made of a first material of hard metal and having a support part defining four parts, and installing a separate brake operating cylinder made of a second material in the recess. a molding step of molding at least one body of a moldable metal third material over the support member so as to at least partially cover the support member; A method for manufacturing a disc brake carrier characterized by comprising the following. (191) The method for manufacturing a disc brake carino according to claim 18, wherein the molding step includes a step of forming at least one precise surface on the body. A method of manufacturing a disc brake carino f according to claim 18, characterized in that at least one precision opening is formed in the body.Additionally, at least one precision surface is formed on the cylinder. 19. A method of manufacturing a disc brake caliper according to claim 18, characterized in that it comprises a surface setting step in which the precise surface is machined onto the cylinder in the surface setting step. Disc brake cap IJ zf according to claim 21
manufacturing method. 6. The method of manufacturing a disc brake carrier as claimed in claim 21, wherein the surface setting step is accomplished before the inserting step. 19. The method of manufacturing a disc brake caliper according to claim 18, wherein the molding step is performed before the inserting step. (c) At least the support portion of the support member is fitted into the body in the molding step, so that a portion of the die forms the inner surface of the recess, and after the insertion step is completed, the cylinder is fitted into the body. 25. The method of manufacturing a disc brake caliper according to claim 24, wherein the mounting comprises supporting the part.