JP5335123B2 - Disc brake device with parking mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the assemblability of the components incorporated in the deep part of a cylinder space 9a arranged in a caliper 5a among components of adjustment mechanism 12a and the parking mechanism, and to realize the structure in which it is less likely to damage the inner circumferential surface of this cylinder space 9a in the assembly work. <P>SOLUTION: Some of the components of a parking brake mechanism are incorporated between an inner side case 45 and an outer side case 46, the two case 45 and 46 are combined by engaging lock holes 51, 51 and lock claws 55, 55, and an inner side auxiliary assembly 59 is formed. In this state, the diameter of circumscribed circle of the lock claws 55, 55 is configured to be smaller. Then, when the inner side auxiliary assembly 59 is incorporated in the cylindrical space 9a, the two lock claws 55, 55 are engaged with a lock concave 61 which is formed on the inner peripheral surface of the cylindrical space 9a by making the two lock claws 55, 55 protrude greatly from the outer peripheral surface of the inner side case 45. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention relates to an improvement of a disc brake device with a parking mechanism having an adjusting mechanism for keeping a gap between the lining and a rotor at an appropriate value during non-braking regardless of wear of a pad lining. Specifically, among the components of the adjusting mechanism and the parking mechanism, it is intended to improve the assembling property of the parts incorporated in the inner part of the cylinder space provided in the caliper.

  2. Description of the Related Art A disk brake device with a parking mechanism that performs braking during driving (service brake) hydraulically and mechanically brakes during parking (parking brake) has been widely used, for example, as described in Patent Documents 1 to 3 Are known. 30 to 31 show the structure described in Patent Document 2 among them. First, this conventional structure will be briefly described. The inner and outer pads 3 and 4 and the caliper 5 are axially connected to the support 2 fixed to the vehicle body (a knuckle or other structural member of the suspension device) in a state adjacent to the rotor 1 that rotates together with the wheels (in the present specification and In the claims, the axial direction refers to the axial direction of the rotor 1 unless otherwise specified). The caliper 5 is formed by connecting and fixing a main part 6 constituting an outer side or an intermediate part and a sub part 7 constituting an inner side end by bolts 8 and 8. A piston 10 is fitted in a cylinder space 9 provided in the half of the main portion 6 on the side opposite to the rotor via a sleeve 11 so as to be axially displaceable and liquid-tight. An adjustment mechanism 12 and a cam mechanism 13 are provided in this order from the piston 10 side between the piston 10 and the back end surface of the sub-part 7.

  When the service brake is operated, hydraulic pressure is introduced into the cylinder space 9 (pressurized brake oil is fed), the piston 10 is displaced in a direction approaching the rotor 1, and the inner pad 3 is moved to the rotor 1. Press against the inner side. As a reaction of the pressing, the caliper 5 is displaced toward the inner side with respect to the support 2, and the outer pad 4 is pressed against the outer side surface of the rotor 1 by a caliper claw 14 provided at an outer side end portion of the caliper 5. As a result, the rotor 1 is strongly pressed from both sides in the axial direction to perform braking.

  When the parking brake is activated, the camshaft 16 constituting the cam mechanism 13 is rotated by the parking lever 15. Then, due to the change in the engagement state between the rollers 17 and 17 and the cam surfaces 18 a and 18 b based on this rotation, the interval between the pair of cam members 19 a and 19 b is widened, and the adjustment spindle 20 approaches the rotor 1. Pressed. Then, the adjusting spindle 20 presses the piston 10 in a direction approaching the rotor 1 via the adjusting screw 21. As a result, as in the case of the service brake described above, the rotor 1 is clamped from both sides in the axial direction by the inner and outer pads 3 and 4 to perform braking.

  When wear of the linings constituting both the pads 3 and 4 progresses, the adjusting screw 21 is displaced in a direction approaching the rotor 1 while rotating with respect to the adjusting spindle 20 at the time of service braking. Then, the retracted position of the piston 10 in the state where the service brake is released moves to the rotor 1 side to compensate for the wear of the lining constituting the pads 3 and 4. When an excessive brake fluid pressure is applied to the piston 10 such as when a service brake is operated during sudden braking or the like, the adjustment screw 21 becomes unrotatable with respect to the adjustment spindle 20, and the adjustment spindle 20 Moves against the elasticity of the spring 22 together with the adjusting screw 21 in a direction approaching the rotor 1. For this reason, the so-called over-adjustment in which the piston 10 is displaced closer to the rotor 1 as the linings forming the pads 3 and 4 and the both side surfaces of the rotor 1 rub against each other during non-braking is prevented.

  As is apparent from FIG. 31, the disk brake device with a parking mechanism as described above has many fine components and is troublesome to assemble. In the case of the conventional structure shown in FIGS. 30 to 31, since the caliper 5 is divided into two parts, a main part 6 and a sub part 7, many of the parts constituting the parking mechanism among the respective constituent parts. Is assembled to the sub-portion 7 and then the sub-portion 7 and the main portion 6 are joined by the bolts 8 and 8 so that the assembling work can be performed relatively easily. However, the use of a two-part caliper is disadvantageous in terms of reducing the size and weight of the disc brake device with a parking mechanism including the caliper. In order to reduce the size and weight of the disc brake device with a parking mechanism, it is preferable to use an integrated caliper as in the structures of the inventions described in Patent Documents 1 and 3. However, in this case, it is necessary to consider to facilitate the work of assembling the fine parts for configuring the adjustment mechanism at the inner end of the cylinder space provided on the caliper (the end opposite to the rotor). become.

  Japanese Patent Application Laid-Open No. 2004-228561 describes a technique of assembling components while incorporating components into the inner part of the cylinder space and appropriately retaining them with a retaining ring. However, it is inevitable that the assembling work is troublesome. On the other hand, in Patent Document 3, the components of the parking mechanism that generates a thrust by a mechanical structure are grouped as a subassembly unit by a cartridge (31) and a spring retainer (27). Are described (paragraph [0027] portion of the specification and FIGS. 1 and 5). However, according to the structure of the invention described in Patent Document 3, when the subassembly unit is assembled outside the cylinder space, a part of the cartridge (31) is bent and formed (the remolding lug 32 is formed). However, since this cartridge (31) and some of the components (inclined element 12) are combined, the combination work becomes troublesome. Moreover, in the structure of the invention described in Patent Document 3, when the subassembly assembled in advance is pushed into the cylinder space of the caliper, the protruding lug (28) of the spring retainer (27) is in the cylinder space ( It is easy to rub against the inner peripheral surface of the bore 4). And when rubbing, there is a possibility of damaging the inner peripheral surface of this cylinder space.

JP 2004-286202 A JP 2007-177995 A Special table 2008-522106 gazette

In view of the circumstances as described above, the present invention aims to improve the assemblability of components that are to be incorporated in the inner part of the cylinder space provided in the caliper among the components of the adjustment mechanism and the parking mechanism. Further, the present invention was invented to realize a structure that hardly damages the inner peripheral surface of the cylinder space.

The disc brake device with a parking mechanism of the present invention is similar to the conventionally known disc brake device with a parking mechanism, and includes a rotor, a support, an inner pad and an outer pad, a caliper, a piston, and a parking mechanism. Is provided.
Of these, the rotor rotates with the wheels.
The support is supported and fixed to the vehicle body adjacent to the rotor.
Further, the inner pad and the outer pad support the support so that the rotor can be displaced in the axial direction while sandwiching the rotor from both sides in the axial direction.
The caliper has a caliper claw for pressing the outer side surface of the outer pad at the outer side end portion, and a cylinder space that opens toward the inner pad in the inner side half portion, respectively, and the support in the axial direction. Supports the displacement of.
Further, the piston is fitted into a portion of the cylinder space near the opening so as to be capable of axial displacement.
The parking mechanism is provided between the back end surface of the cylinder space and the piston, and is used to rotate some of the components that rotate in response to the swinging displacement of a parking lever provided outside the cylinder space. Along with this, the axial dimension is expanded and the piston is pressed toward the inner pad.

In particular, the disc brake device with a parking mechanism of the present invention includes an anti-rotor side case and a rotor side case.
And among these anti-rotor side case and rotor side case, components other than the components assembled with respect to the piston among the components of the parking mechanism are assembled. Of these, the anti-rotor side case is supported by being fitted into the inner end of the cylinder space, and the rotor side case is disposed closer to the rotor than the anti-rotor side case.
The rotor-side case of these two cases includes an elastic arm piece extending from a plurality of locations toward the counter-rotor side in the circumferential direction of the outer peripheral edge, and the anti-rotor side end of each elastic arm piece. A plurality of locking claw pieces that are bent outward with respect to the radial direction of the rotor-side case are respectively formed on the portion (tip portion) .
In addition, a locking portion having an end facing toward the anti-rotor side is formed in a part of the anti-rotor side case.
Then, in a state before assembling the anti-rotor side case and the rotor side case at a predetermined position in the cylinder space, the locking claw pieces and the respective locking claw pieces in which the diameter of the circumscribed circle is smaller than the inner diameter of the cylinder space Based on the engagement with the locking portion, the two cases are prevented from separating.
In contrast, and fitted anti rotor side case of these two cases to a predetermined position of the inner end of the cylinder space, further the rotor side case in a state assembled in a predetermined position of the cylinder space, the Utilizing the elastic force of each elastic arm piece directed radially outward, the amount of protrusion of each locking claw piece from the outer peripheral surface of the non-rotor side case is increased, and each locking claw piece is By engaging with a locking recess formed on the inner peripheral surface of the cylinder space, the two cases are prevented from coming off from the cylinder space.

When carrying out such a present invention, for example, as in the invention described in claim 2, wherein each locking portion, which is formed the in a state of penetrating the counter-rotor-side casing in the radial direction retaining hole And

In carrying out the present invention, for example, as in the invention described in claim 3, each of the elastic arm pieces or the rotor in a state in which each of the locking claw pieces is engaged with the locking recess. A part of the anti-rotor side case or a part of the anti-rotor side case and the rotor on the inner diameter side of a portion (including the locking claw piece) provided on the anti-rotor side of these elastic arm pieces in the side case A part to be incorporated between the side case and the side case is positioned to regulate the displacement of each elastic arm piece inward in the radial direction. As a result, the locking claw pieces are prevented from coming out of the locking recess.

When carrying out the present invention, for example, as in the invention described in claim 4, a compression spring is incorporated between the two cases on the opposite rotor side and the rotor side. Then, in a state where the compression spring is compressed by a predetermined amount, the locking claw pieces and the locking portions are engaged with each other so that the opposite rotor side and rotor side cases are not separated from each other. By compressing the spring beyond the predetermined amount, each locking claw piece is engaged with the locking recess.

Furthermore, when carrying out the present invention, as in the invention described in claim 5, for example, each of the locking claw pieces has a width dimension in the circumferential direction of the rotor side case that is the same as that of each elastic arm piece. It is assumed that the non-rotor side half of the wide part larger than the width dimension in the direction is formed by bending outward in the radial direction of the rotor side case. Moreover, let each said latching | locking part be the latching hole provided in the rotor side edge part of the said anti-rotor side case. Further, among these locking holes, the width dimension in the circumferential direction of the anti-rotor side case between the center portion in the circumferential direction of the anti-rotor side case and the rotor side edge of the anti-rotor side case. Is provided with a communicating portion that is not less than the width of the elastic arm piece.
Then, in a state before the counter-rotor side case is fitted into a predetermined position of the inner end of the cylinder space and the rotor side case is assembled to the predetermined position of the cylinder space, Each locking hole is inserted from the inside to the outside with respect to the radial direction of the non-rotor side case, and both the locking claw pieces and the locking holes are engaged with each other at both ends in the circumferential direction. Prevent separation between cases.
On the other hand, after the assembly, each of the elastic arm pieces is displaced outwardly with respect to the radial direction of the anti-rotor side case rather than the anti-rotor side case through the communicating portion, The tip of the piece is engaged with the locking recess. Accordingly, the two cases are prevented from coming off from the cylinder space, and the wide portion is moved to the outside of the communication portion with respect to the radial direction of the anti-rotor side case. The retaining claws are prevented from coming off.

  According to the disc brake device with a parking mechanism of the present invention configured as described above, among the components of the adjusting mechanism and the parking mechanism, it is possible to improve the assembling property of the parts incorporated in the inner part of the cylinder space provided in the caliper. . In other words, the above components installed in the cylinder space in the completed state can be assembled between the opposite rotor side and rotor side cases in a wide space outside the cylinder space, and are assembled as a subassembly unit. It can be in the state. In addition, when assembling the sub-assembly unit, there is no need for troubles such as plastic deformation of each component including the case on both the non-rotor side and the rotor side. For this reason, as compared with the conventional structure described in the above-mentioned Patent Document 3, the assembly work can be facilitated (improvement of assembly).

Further, according to the present invention, when the subassembly unit assembled outside the cylinder space is inserted into the inner part of the cylinder space, the outer periphery of the other case (the non-rotor side case) in which each locking hole is formed. The protruding amount of each locking claw piece from the surface can be suppressed to be small (at least the diameter of the circumscribed circle of the locking claw piece can be made smaller than the inner diameter of the cylinder space) . For this reason, it is possible to reduce the possibility that the tip edge of each locking claw piece rubs against the inner peripheral surface of the cylinder space as the assembly unit is inserted, and to reduce the possibility that the inner peripheral surface is damaged. .
In particular, according to the invention described in claims 3 and 5 , it is ensured that the distal end portion of each locking claw piece comes out of the locking recess after the subassembly unit is inserted into the inner portion of the cylinder space. Can be prevented. For this reason, after the sub assembly unit is inserted into the inner part of the cylinder space, the sub assembly unit is not prepared from the cylinder space before assembling another member such as a piston near the opening of the cylinder space. Can be prevented from coming out.

Sectional drawing regarding the virtual plane containing the central axis of a rotor which shows the 1st example of embodiment of this invention. The disassembled perspective view which shows the subassembly unit formed by previously combining the member assembled | attached to the inner part of cylinder space in the state seen from the rotor side. The perspective view which shows a lamp plate in the state seen from the rotor side. The perspective view shown in the state which looked at the non-rotor side case from the non-rotor side. The perspective view which shows the state before assembling in a cylinder space after assembling a sub assembly unit in the state seen from the rotor side. Sectional drawing similarly shown in the state seen from the same direction as FIG. The engagement relationship between the locking claw piece, the locking hole, and the locking recess is shown by the state (B) after the subassembly unit is assembled and the state (B) after assembling the cylinder assembly. FIG. The perspective view which shows the state after having assembled | attached in the cylinder space after assembling a sub assembly unit in the state seen from the rotor side. Sectional drawing similarly shown in the state seen from the same direction as FIG. Sectional drawing regarding the virtual plane containing the central axis of a rotor which shows the 2nd example of embodiment of this invention. The perspective view (A) and half sectional view (B) seen from the rotor side, shown in a state before assembling in the cylinder space after assembling the sub assembly unit. Similarly, a perspective view (A) and a cross-sectional view (B) viewed from the rotor side, showing a state after the sub-assembly unit is assembled and then assembled in the cylinder space. Sectional drawing regarding the virtual plane containing the central axis of a rotor which shows the 3rd example of embodiment of this invention. The disassembled perspective view which shows the subassembly unit formed by previously combining the member assembled | attached to the inner part of cylinder space in the state seen from the rotor side. The perspective view (A) and partial cutaway perspective view (B) which show the state before assembling in a cylinder space after assembling a sub-assembly unit in the state seen from the rotor side. Similarly, the perspective view (A) and partial cutaway perspective view (B) which show the state after having assembled in cylinder space in the state seen from the rotor side. Sectional drawing regarding the virtual plane containing the central axis of a rotor which shows the 4th example of embodiment of this invention. A perspective view (A) and a cross-sectional view (B) showing the state before assembling in the cylinder space after assembling the sub assembly unit in which the members assembled in the inner part of the cylinder space are assembled in advance, as viewed from the rotor side. . Similarly, the perspective view (A) and sectional view (B) which show the state after having assembled in the cylinder space in the state seen from the rotor side. The (a) enlarged view (A) of (A) of FIG. 18 and the (B) enlarged view (B) of (A) of FIG. Sectional drawing regarding the virtual plane containing the central axis of a rotor which shows the 5th example of embodiment of this invention. FIG. 22 is an enlarged cross-sectional view of the right half center portion of FIG. 21. The disassembled perspective view which shows the subassembly unit formed by previously combining the member assembled | attached to the inner part of cylinder space in the state seen from the rotor side. FIG. 24 is an enlarged view of a portion C in FIG. 23. The perspective view (A) and sectional drawing (B) which show the state in the middle of assembling a subassembly unit in the state seen from the rotor side. The perspective view (A) and sectional drawing (B) which show the state after assembling a sub-assembly unit in the state seen from the rotor side. The double part enlarged view (A) of (A) of FIG. 26 and the E part enlarged view (B) of (B) of FIG. The perspective view (A) and sectional drawing (B) which show the state in the middle of assembling the assembled sub assembly unit in cylinder space in the state seen from the rotor side. Furthermore, the perspective view (A) and sectional drawing (B) which show the state after having assembled | attached in the cylinder space in the state seen from the rotor side. Sectional drawing regarding the virtual plane containing the central axis of a rotor which shows an example of the conventional structure. The disassembled perspective view of each component member assembled | attached to the sub part of a caliper and this sub part.

[First example of embodiment]
1 to 9 show a first example of an embodiment of the present invention corresponding to claims 1, 2, and 4. FIG. This example is a floating caliper type disc brake that operates the present invention hydraulically as a service brake for stopping a running vehicle and mechanically as a parking brake for maintaining the vehicle in a stopped state. The case where it applies to is shown. Therefore, in the case of the structure of this example, the inner and outer pads 3a and 4a and the caliper 5a are displaced in the axial direction with respect to the support 2a fixed to the vehicle body in a state adjacent to the rotor 1a rotating with the wheel. I support it as possible. Of these, the inner and outer pads 3a, 4a are provided so as to sandwich the rotor 1a from both sides in the axial direction. Further, the caliper 5a is provided with a caliper claw 14a at an outer side end portion and a cylinder portion 23 at an inner side half portion. The piston 10a is fitted in a cylinder space 9a provided in the cylinder portion 23 so as to open toward the rotor 1a so as to be axially displaceable and liquid-tight. And between this piston 10a and the back end face of the cylinder space 9a, in order from the piston 10a side, between the both side faces of the rotor 1a and the linings of the pads 3a and 4a during non-braking. Are provided with an adjusting mechanism 12a for keeping the gap between them at an appropriate value and a cam mechanism 13a constituting a parking mechanism.

  Of these, the adjusting mechanism 12 a includes an adjusting nut 24, an adjusting spindle 20 a, an adjusting spring 25, and a thrust bearing 26. Of these, the adjusting spindle 20a is provided with an adjusting flange portion 27 at a portion near the intermediate rotor, and a multi-thread male screw portion 28 at a portion near the rotor. The outer peripheral surface of the adjustment flange 27 is a partially conical convex surface that is inclined in a direction in which the outer diameter decreases toward the rotor side, and this outer peripheral surface is formed at an axially intermediate portion of the inner peripheral surface of the piston 10a. These are opposed to a concave conical receiving surface 29 that is inclined at the same angle in the same direction as the outer peripheral surface. Further, the adjusting spring 25 and the thrust bearing 26 are disposed between the retaining ring 30 and the adjusting collar portion 27 between the retaining ring 30 that is locked to a portion of the inner peripheral surface of the piston 10a opposite to the rotor. In order. Further, the adjustment nut 24 is formed with a multi-thread female thread portion 31 on the inner peripheral surface, and the multi-thread female thread portion 31 is screwed with the multi-strand male thread portion 28 of the adjustment spindle 20a.

  On the other hand, the cam mechanism 13a is of a ball ramp type, and is provided in a portion between a thrust receiving portion 32 formed on a portion closer to the outer surface of the adjusting nut 24 than the rotor and a rear end surface of the cylinder space 9a. Yes. For this reason, in the case of the present example, the thrust washer 33, the thrust needle bearing 34, the ramp plate portion 36 of the ramp shaft 35, and the cage 37 are sequentially inserted between the thrust receiving portion 32 and the intermediate portion. There are provided a plurality of balls 38 and 38, and a lamp plate 39, which are held at equal intervals in the circumferential direction so as to be able to roll. Lamp grooves 40a and 40b are formed at a plurality of locations (three locations in the illustrated example) on the surfaces of the lamp plate 39 and the lamp plate portion 36 facing each other. Each of the ramp grooves 40a and 40b has a partial arc shape when viewed from the axial direction, and the depth in the axial direction gradually changes in the circumferential direction.

  In the case of this example, it is considered to use the same shape as the lamp shaft 35 and the lamp plate 39 assembled to the left and right wheels. For this reason, as shown in FIGS. 2 to 3, the lamp grooves 40a and 40b are shaped so that the central portion is deepest in the circumferential direction of the lamp shaft 35 and the lamp plate 39 and gradually becomes shallower toward both ends. Yes. However, if the left and right wheels may have different shapes, the shape of each ramp groove is shallowest at one end in the circumferential direction of the lamp shaft and the lamp plate and deepest at the other end. To do. In this case, the direction in which the lamp groove depth on the lamp shaft side changes and the direction in which the lamp groove depth on the lamp plate side change are opposite to each other. Also in the illustrated example, the changing directions of the portions engaged with each other via the balls 38 are opposite to each other.

  In any case, the balls 38 are sandwiched between the lamp groove 40b on the lamp shaft 35 side and the lamp grooves 40a and 40a on the lamp plate 39 side so as to roll freely. Further, the drive shaft 41 constituting the lamp shaft 35 together with the lamp plate portion 36, the central hole 42 of the lamp plate 39 and the through hole 43 provided in the bottom portion of the cylinder portion 23 are liquid-tight and rotated. And axial displacement is possible. The base end portion of the parking lever 15a is coupled and fixed to a portion of the tip end portion of the drive shaft 41 that protrudes from the outer surface on the side opposite to the rotor of the cylinder portion 23. When the lamp shaft 35 is rotated by the parking lever 15a, the balls 38, 38 roll along the lamp grooves 40a, 40b (between the deep portion and the shallow portion), and the lamp plate portion. The distance between 36 and the lamp plate 39 is enlarged or reduced. Then, at the time of expansion, the adjusting nut 24 is pressed to the rotor side via the thrust needle bearing 34.

  Each of the members 24, 33, 34, 35, 38, 39 constituting the cam mechanism 13a as described above is a compression spring described in the claims, together with the preload spring 44, the anti-rotor side case 45 and the rotor side. It is housed in a cam case 47 composed of a case 46. Of these, the anti-rotor side case 45 is integrally formed by subjecting a metal plate such as a stainless steel plate or carbon steel plate as a material to plastic processing such as drawing or burring in addition to punching. For example, as shown in FIGS. 2 and 4, a cylindrical peripheral wall 48 is provided. Then, bent plate portions 49a and 49b that are bent inward in the radial direction of the peripheral wall portion 48 are provided at a plurality of circumferential positions (three locations in the illustrated example) on the edge of the peripheral wall portion 48 on the opposite side of the rotor. ing. Among these, a pair of bent portions 49a and 49a having a substantially triangular shape with their tip portions sharpened at right angles are provided in a state of being shifted to the half-circumferential portion of the peripheral wall portion 48, and the remaining bent portions 49b are rectangular. With respect to the circumferential direction of the peripheral wall portion 48, the bent portion 49a is provided at an intermediate position between the bent portions 49a. Further, a cylindrical portion 50 protruding toward the opposite rotor side is provided at the center of the remaining bent portion 49b. Further, a pair of locking holes 51 and 51 and guide cutouts 52 and 52 are alternately arranged at portions near the rotor of the peripheral wall portion 48 and at equal intervals in the circumferential direction of the peripheral wall portion 48 (90 Forming every time). Of these, the pair of locking holes 51, 51 are rectangular and do not reach the rotor side end edge of the peripheral wall portion 48 at two positions opposite to the rotor side end portion of the peripheral wall portion 48 in the radial direction. It is formed with. On the other hand, the guide notches 52 and 52 are rectangular and are formed at two positions on the rotor side end portion of the peripheral wall portion 48 on the radially opposite side so as to open to the rotor side end edge of the peripheral wall portion 48. ing.

  On the other hand, the rotor side case 46 is integrally formed as shown in FIGS. 2, 5, and 8 by bending a metal plate such as a stainless steel plate or a carbon steel plate in addition to punching. ing. Such a rotor-side case 46 includes a holding ring portion 53 and a pair of elastic arm pieces 54 and 54 that are bent toward the opposite rotor side from two positions on the outer peripheral edge of the holding ring portion 53 in the radial direction. Prepare. Further, the end portions of both elastic arm pieces 54 and 54 are bent at substantially right angles outwardly in the radial direction of the holding ring portion 53 to form locking claw pieces 55 and 55, respectively. Furthermore, at the portion closer to the distal end of the middle part of the both elastic arm pieces 54, 54, a portion closer to the base end side (the rotor side, the holding ring portion 53 side) than both the locking claw pieces 55, 55, Step portions 56 and 56 are formed which are bent in a direction in which the distal end side is present radially outward of the rotor side case 46 with respect to the proximal end side.

  Among the components constituting the adjusting mechanism 12a and the parking mechanism between the anti-rotor side case 45 configured as described above and the rotor side case 46 configured as described above, the piston 10a Parts other than the parts to be assembled are assembled. The parts constituting the adjusting mechanism 12a and the parking mechanism other than the parts assembled to the piston 10a are, in order from the side opposite to the rotor, as shown in FIGS. The cage 37 and the balls 38, the ramp plate portion 36 of the ramp shaft 35, the thrust needle bearing 34, the thrust washer 33, the adjustment nut 24, and the preload spring 44. The drive shaft 41 of the lamp shaft 35 is inserted through the center hole of the lamp plate 39 and the center hole of the retainer 37 and protrudes more to the opposite rotor side than these members 39 and 37.

  Of the members 39, 37, 38, 36, 34, 33, 24, 44 assembled between the cases 45, 46, the lamp plate 39 to be assembled closest to the rotor side is the anti-rotor side case. The inner end of the rear end 45 (the end on the opposite side of the rotor) is fitted in a state where rotation and axial displacement are prevented. For this purpose, recesses 57a and 57b that are engaged with the respective bent plate portions 49a and 49b provided at the back end portion of the anti-rotor side case 45 without rattling are provided on the side of the ramp plate 39 opposite to the rotor. Forming. Further, the adjustment nut 24 is fitted to the portion near the rotor side opening of the counter rotor side case 45 so as to be capable of axial displacement in a state where rotation is prevented. For this purpose, a pair of guide projecting pieces 58 and 58 projecting at two positions on the radially outer side of the outer peripheral edge of the thrust receiving portion 32 formed on the outer peripheral surface of the adjusting nut 24 are provided with the anti-rotor side case 45. The guide notches 52 and 52 are engaged with each other.

  The operation of assembling the members 39, 37, 38, 36, 34, 33, 24, 44 between the cases 45, 46 is performed in a wide place outside the cylinder space 9a. Then, after these members 39, 37, 38, 36, 34, 33, 24, 44 are assembled between the cases 45, 46, these members 39, 37, 38, 36, 34, 33, Before assembling the cases 24 and 44 together with the cases 45 and 46 into the cylinder space 9a, the cases 45 and 46 are joined in a non-separable manner. For this reason, in the case of this example, the members 39, 37, 38, 36, 34, 33, 24, 44 are arranged in a predetermined order between the two cases 45, 46. The non-rotor side and rotor side cases 45 and 46 are brought closer to each other while the preload spring 44 is elastically compressed. At this time, both the elastic arm pieces 54 and 54 are elastically deformed in a direction in which the distal ends thereof are brought close to each other, and the both elastic arm pieces 54 are brought close to a predetermined distance. , 54 is released. Then, the both locking claw pieces 55 and 55 formed at the distal ends of both elastic arm pieces 54 and 54 are caused to enter the both locking holes 51 and 51 from the inner diameter side of the counter rotor side case 45. . In this state, when the force in the direction in which the non-rotor side case 45 and the rotor side case 46 are brought close to each other is released, as shown in FIGS. 5 to 6 and FIG. , 55 are engaged with the rotor side edges of the locking holes 51, 51 to prevent the cases 45, 46 from being separated from each other. As a result, as shown in FIGS. 5 to 6, a part of the components of the parking mechanism and the adjusting mechanism 12a is assembled between the cases 45 and 46, and the sub-rotor side auxiliary assembly (sub-assembly unit). 59) is obtained.

  Such an anti-rotor side auxiliary assembly 59 is pushed into the cylinder space 9a with the anti-rotor side case 45 in the back. A bottomed circular receiving hole 60 is formed in a portion of the cylinder space 9a that is off the center of the back end surface, and a cylinder formed on the counter rotor side end surface of the anti-rotor side case 45 in the receiving hole 60. Part 50 is inserted. The engagement between the receiving hole 60 and the cylindrical portion 50 prevents the counter-rotor side case 45 from rotating in the cylinder space 9a. In the state of the counter-rotor side auxiliary assembly 59, the diameter of the circumscribed circle of the locking claw pieces 55, 55 is sufficiently smaller than the inner diameter of the cylinder space 9a. Therefore, when the counter-rotor side auxiliary assembly 59 is inserted into the cylinder space 9a, the leading edges of the locking claw pieces 55 and 55 are strongly rubbed against the inner peripheral surface of the cylinder space 9a. No damage to the inner surface.

  The lamp plate 39 on the side opposite to the rotor needs to be supported on the caliper 5a via the case 45 on the side opposite to the rotor in a state in which the rotation around the central axis thereof is sufficiently suppressed. Of these, the anti-rotor side case 45 is prevented from rotating with respect to the caliper 5a by the engagement between the receiving hole 60 and the cylindrical portion 50, and the anti-rotor side case 45 is prevented from rotating against the anti-rotor side case 45. A pair of parallel side edges 76, 76 (see FIG. 4) provided on each bent plate portion 49a, 49a and a pair of parallel step surfaces 77, 77 (see FIG. 3) provided on the concave portions 57a, 57a. By engaging with. Therefore, the clearance between the receiving hole 60 and the cylindrical portion 50 and the both side edges 76 and 76 that are connected to the rattling in the rotational direction around the central axis (the direction of the arrow α in FIG. 4). The gaps of the engaging portions with both the step surfaces 77 and 77 are both kept to a slight value of about 0.05 to 0.2 mm. On the other hand, the gap in the radial direction of the ramp plate 39 and the anti-rotor side case 45 indicated by an arrow β in FIG. 4 does not need to be regulated very strictly, for example, about 0.3 to 0.5 mm. Even if there is shakiness, there is no particular problem. On the other hand, it is not preferable that the receiving hole 60 is a long hole that is long in the radial direction of the lamp plate 39 and the non-rotor side case 45 because the processing cost of the receiving hole 60 increases. Therefore, in the case of this example, the receiving hole 60 is a bottomed circular hole, and instead of strictly regulating the accuracy of the assembly position of the anti-rotor side case 45 with respect to the caliper 5a, the anti-rotor side case 45 and the above-mentioned A certain degree of freedom in the radial direction (arrow β direction) with the lamp plate 39 is ensured (about 0.3 to 0.5 mm). Further, manufacturing errors that may occur between the lamp shaft 35 and the cylinder portion 23 and the through hole 43 are absorbed.

  As described above, the receiving hole 60 and the cylindrical portion 50 are engaged with each other, and the anti-rotor side surface of each of the bent plate portions 49a and 49b of the anti-rotor side case 45 is set to the back end surface of the cylinder space 9a. From the abutted state, the rotor side case 46 is pushed into the cylinder space 9a while further elastically compressing the preload spring 44. Then, as shown in FIG. 7 (B) and FIGS. 8 to 9, the step portions 56, 56 near the front ends of the intermediate portions of the elastic arm pieces 54, 54 are placed in the locking holes 51, 51. The amount of protrusion of both the locking claw pieces 55 and 55 from the outer peripheral surface of the non-rotor side case 45 increases. And the front-end | tip part of both these latching claw pieces 55 and 55 approachs into the groove-shaped latching recessed part 61 formed in the inner peripheral surface of the said cylinder space 9a over the perimeter. In this state, when the force pushing the anti-rotor side case 45 into the cylinder space 9a is released, the front ends of both locking claw pieces 55, 55 are placed on the rotor side inner surface of the locking recess 61, The preload spring 44 is engaged by the elasticity. As a result, the non-rotor side case 45 does not come out of the cylinder space 9a, and each of the constituent members 45, 46, 39, 37, 38, 35, 34, 33, 24, of the anti-rotor side auxiliary assembly 59 is provided. 44 is assembled at an appropriate position in the inner half (the non-rotor side half) of the cylinder space 9a.

The height H ₅₀ (see FIG. 6) of the cylindrical portion 50 is such that the step portion 56 enters the locking hole 51 from the state shown in FIG. The sliding amount L of the rotor side case 46 with respect to the counter rotor side case 45 is larger than the amount of protrusion of the locking claw piece 55 from the outer peripheral surface (H ₅₀ > L). Therefore, before the at least tip portion of the cylindrical portion 50 enters the receiving hole 60, the protruding amount of the locking claw piece 55 from the outer peripheral surface of the counter rotor side case 45 does not increase. Therefore, the cylindrical portion 50 and the receiving hole 60 are engaged with each other so that the anti-rotor side auxiliary assembly 59 is placed in the cylinder space 9a and the phase of the anti-rotor side auxiliary assembly 59 in the circumferential direction is set. Assembling work can be easily performed in an appropriate state. Further, at the same time when the counter-rotor side auxiliary assembly 59 is inserted into the cylinder space 9 a, the drive shaft 41 of the ramp shaft 35 is inserted into a through hole 43 provided at the bottom of the cylinder portion 23. An O-ring 62 and a sleeve (radial sliding bearing) 63 are mounted on the inner peripheral surface of the through-hole 43 in advance.

  On the other hand, the adjustment spindle 20a, the adjustment spring 25, the thrust bearing 26, and the retaining ring 30 constituting the adjustment mechanism 12a are assembled in advance on the inner diameter side of the piston 10a, and the rotor side auxiliary assembly is assembled. A solid 64 is set. Since the assembly work of the rotor side auxiliary assembly 64 can be performed in a wide place outside the cylinder space 9a, it is easy. The rotor-side auxiliary assembly 64 includes the anti-rotor-side auxiliary assembly in which a multi-thread male screw portion 28 provided at the tip end portion (non-rotor-side end portion) of the adjustment spindle 20a is previously incorporated in the cylinder space 9a. The cylinder 59 is assembled into the cylinder space 9 a while being screwed with the multi-thread female thread 31 on the inner peripheral surface of the adjustment nut 24 of the solid body 59. An oil ring 66 for maintaining liquid tightness is mounted in advance in a locking groove 65 provided in an opening portion (rotor portion) of the inner peripheral surface of the cylinder space 9a. Accordingly, the piston 10a is incorporated in the cylinder space 9a while being in sliding contact with the inner peripheral surface of the oil ring 66.

  Subsequent to the anti-rotor side auxiliary assembly 59, the rotor side auxiliary assembly 64 is assembled to a predetermined position in the cylinder space 9a, and then the outer peripheral surface of the tip (rotor side end) of the piston 10a and the A dust-proof boot 67 is mounted between the caliper 5a. Thereafter, the caliper 5a is assembled to the support 2a together with the inner and outer pads 3a and 4a so as to be axially displaceable. Further, the support 2a is attached to a structural member of a suspension device such as a knuckle. 4a is supported and fixed in a state of being disposed on both sides of the rotor 1a to complete a disc brake device with a parking mechanism.

  When a service brake is operated to decelerate or stop the traveling vehicle, hydraulic pressure is introduced into the cylinder space 9a to push the piston 10a out of the cylinder space 9a. Then, like the known floating caliper type disc brake, the linings of the pads 3a and 4a are pressed against both side surfaces of the rotor 1a to perform braking. When the linings of both the pads 3a and 4a are worn due to repeated braking and the movement amount of the piston 10a increases, the adjustment mechanism 12a moves the piston in the non-braking state in the same manner as a conventionally known adjustment mechanism. The position of 10a is moved to the rotor side. That is, the outer peripheral surface of the adjustment collar portion 27 of the adjustment spindle 20a and the receiving surface 29 are separated from each other, and the elasticity of the adjustment spring 25 and the screwing of the multi-thread male screw portion 28 and the multi-thread female screw portion 31 are performed. Based on the above, the adjusting spindle 20a is displaced to the rotor side while rotating to compensate for the wear of the lining.

  On the other hand, when the parking brake is operated, the lamp shaft 35 is rotated by the parking lever 15a. Then, the balls 38, 38 roll along the lamp grooves 40 a, 40 b from the deep portions to the shallow portions of the lamp grooves 40 a, 40 b, and the lamp plate portion 36 and the lamp plate 39. Increase the distance. Then, the piston 10a is pressed to the rotor side through the thrust needle bearing 34, the adjustment nut 24, and the adjustment spindle 20a. In the same manner as in the case of the service brake described above, the linings of the pads 3a and 4a are pressed against both side surfaces of the rotor 1a to perform braking. When the parking brake is operated, the adjusting mechanism 12a is not operated.

[Second Example of Embodiment]
FIGS. 10-12 has shown the 2nd example of embodiment of this invention corresponding to Claims 1-4 . In the case of this example, among the axial ends of the pair of locking holes 51, 51 formed in the counter rotor side case 45 a, the end on the counter rotor side is connected to the inner side in the radial direction of the counter rotor side case 45 a. Holding plate portions 68, 68 that extend toward the rotor side case 46 in a state of being bent in the direction are formed. In the structure of this example, the relationship between the members is as shown in FIG. 11 in the state before the assembly of the anti-rotor side assembly 59a and the assembly into the cylinder space 9a of the caliper 5a. This is the same as the case of the first example of the form. On the other hand, in order to assemble and fix the non-rotor side auxiliary assembly 59a in the cylinder space 9a, the step portions 56, 56 of a pair of elastic arm pieces 54, 54 provided on the rotor side case 46 are connected to the both sides. In the state of entering into the locking holes 51, 51, as shown in FIGS. 10 and 12, the tips of both elastic arm pieces 54, 54 are both restrained with respect to the radial direction of the anti-rotor side case 45a. Enter the outside of the plate portions 68, 68. In this state, both the locking claw pieces 55, 55 formed at the distal ends of the both elastic arm pieces 54, 54 are pulled out from the locking recess 61 formed on the inner peripheral surface of the cylinder space 9a ( Displacement inward in the radial direction of the cylinder space 9a is prevented.

According to such a structure of the present example, after the counter-rotor side auxiliary assembly 59a is inserted into the inner part of the cylinder space 9a, the distal end portions of the both locking claw pieces 55, 55 are in the locking recess 61. It can be surely prevented from exiting. For this reason, after inserting the non-rotor side auxiliary assembly 59a into the inner part of the cylinder space 9a, before and after assembling the rotor side auxiliary assembly 64 including the piston 10a and the like in the portion near the opening of the cylinder space 9a. Regardless, the counter-rotor side auxiliary assembly 59a can be prevented from inadvertently coming out of the cylinder space 9a.
Since the configuration and operation of the other parts are the same as in the first example of the above-described embodiment, the same parts are denoted by the same reference numerals, and redundant description is omitted.

[Third example of embodiment]
FIGS. 13-16 has shown the 3rd example of embodiment of this invention corresponding to Claims 1-4 . Also in this example, the pair of locking claw pieces 55a, 55a provided at the opposite end of the rotor side case 46a is formed by bending the distal ends of the pair of elastic arm pieces 54, 54 outward in the radial direction. It is said. In particular, in the case of this example, the projections 69 are respectively formed in the portions where the both side edges of the locking claw pieces 55a, 55a are aligned with each other (the portions where the positions in the radial direction of the rotor side case 46a match each other). , to form a 69, as shown in (B) of FIG. 15, the width _{W 55} of the portions are larger than the width _{w 55} of the tip and _{(W 55> w} 55, the portion Is a wide part). Further, a pair of locking holes 51a formed in the counter-rotor side case 45b, 51a, with respect to the axial direction, the rotor side end portion to the intermediate portion, as shown in FIG. 14, a small narrow portion width w ₅₁ 70 and then, the counter-rotor side end portion, and a wide portion 71 is larger width dimension W _51. Of these, the width dimension w ₅₁ of the narrow portion 70 is smaller than the width dimension W _{55 of the} portion where the projections 69 and 69 of the intermediate portion of both the locking claw pieces 55a and 55a are formed, and the width dimension w of the tip portion. is larger _{(W 55> w 51> w} 55) than _55. On the other hand, the width dimension W ₅₁ of the wide portion 71 is larger than the width dimension W _{55 of the} portion where the protrusions 69 and 69 are formed at the intermediate portion of the both locking claw pieces 55a and 55a (W ₅₁ > W ₅₅ ). Accordingly, the narrow portion 70 allows the distal end portions of the locking claw pieces 55a and 55a to pass but does not allow the wide portion where the projections 69 and 69 are formed to pass. The part of is also passed.

  In such a structure of this example, before assembling the non-rotor side assembly 59b and incorporating it into the cylinder space 9a of the caliper 5a, as shown in FIG. 15, the leading ends of the two locking claw pieces 55a and 55a are assembled. The part is engaged with the narrow part 70. That is, in a state where the wide portions where the protrusions 69 and 69 are formed are engaged with both side edges of the narrow portion 70, the front ends of the locking claw pieces 55a and 55a The rotor side edges of the stop holes 51a and 51a are engaged with each other to the extent that the opposite rotor side and rotor side cases 45b and 46a are not separated from each other. The function in this state is the same as that in the first example of the embodiment described above. On the other hand, when the rotor side case 46a is pushed into the cylinder space 9a while the preload spring 44 is elastically compressed in order to assemble and fix the counter rotor side auxiliary assembly 59b in the cylinder space 9a. The wide portion on which the protrusions 69 and 69 are formed passes through the wide portion 71 and is displaced to the outer diameter side from the peripheral wall portion 48 of the counter rotor side case 45b. As a result, the leading end portions of both the locking claw pieces 55a and 55a sufficiently protrude from the outer peripheral surface of the peripheral wall portion 48 and engage with a locking recess 61 formed on the inner peripheral surface of the cylinder space 9a.

In this state, when the force pressing the rotor side case 46a to the opposite rotor side is released, the rotor side case 46a is slightly returned to the rotor side by the elasticity of the preload spring 44, and the protrusions 69, The wide part forming 69 moves to the rotor side from the wide part 71. In this state, both the locking claw pieces 55a and 55a are not displaced inward in the radial direction of the rotor side case 46a. Therefore, also in the structure of this example, as in the case of the structure of the second example of the embodiment described above, after inserting the counter-rotor side auxiliary assembly 59b into the inner part of the cylinder space 9a, this cylinder space Regardless of before or after the assembly of the rotor side auxiliary assembly 64 including the piston 10a or the like in the portion near the opening of 9a, the anti-rotor side auxiliary assembly 59b can be prevented from inadvertently coming out of the cylinder space 9a.
Since the configuration and operation of the other parts are the same as those of the first example of the embodiment described above, the same parts are denoted by the same reference numerals, and redundant description is omitted.

[Fourth Example of Embodiment]
FIGS. 17-20 has shown the 4th example of embodiment of this invention corresponding to Claims 1-5 . Also in this example, the pair of locking claw pieces 55b and 55b provided at the opposite end of the rotor side case 46b is formed by bending the ends of the pair of elastic arm pieces 54 and 54 outward in the radial direction. It is said. In particular, in the case of this example, both the locking claw pieces 55b and 55b are formed wider than in the case of the first to third examples described above, and the rotor side of the peripheral wall portion 48 of the counter rotor side case 45c. A part of a pair of locking holes 51b, 51b formed at two positions on the opposite side in the diameter direction of the end portion is opened at the rotor side end edge of the peripheral wall portion 48.

That is, in the case of this example, at the distal ends of the pair of elastic arm pieces 54, 54 provided in a state extending from the outer peripheral edge of the rotor side case 46b to the opposite rotor side from two positions on the diametrically opposite side. As shown in FIG. 20, the width dimension W _{72 in} the circumferential direction of the rotor side case 46b is larger than the width dimension w 54 in the same direction of both the elastic arm pieces 54, ₅₄ (W ₇₂ > w ₅₄ ). A wide portion 72 is formed. Then, the opposite half portion of the wide portion 72 is bent outward at a substantially right angle with respect to the radial direction of the rotor side case 46b, thereby forming both the locking claw pieces 55b and 55b. The locking holes 51b and 51b have a convex shape when viewed from the radial direction, and a center portion in the circumferential direction of the peripheral wall portion 48 has a notch shape opened at the rotor side edge of the peripheral wall portion 48. Yes. The width dimension w ₇₃ of the communicating portion 73 that is the rotor-side half of both the locking holes 51 b and 51 b and opens at the rotor-side end edge of the peripheral wall portion 48 is smaller than the width dimension W ₇₂ of the wide-width portion 72. The elastic arm pieces 54 and ₅₄ are larger than the width w ₅₄ (W ₇₂ > w ₇₃ > w ₅₄ ). Further, the width dimension W ₅₁ and the axial length dimension L ₅₁ of the wide portion 71a which is the half-rotor side half of the locking holes 51b and 51b are the width dimension W ₇₂ and the length dimension of the wide portion 72, respectively. L is greater than _{72 (W 51> W 72,} L 51> L 72).

  In such a structure of this example, the state before assembling the anti-rotor side assembly 59c and incorporating it into the cylinder space 9a of the caliper 5a is as shown in FIGS. 18 and 20A. The wide portion 72 at the tip of the arm pieces 54, 54 is disposed inside the protruding plate portions 74, 74 existing on both sides of the communication portion 73 with respect to the radial direction of the anti-rotor side case 45c. Then, the rotor side surfaces of both the locking claw pieces 55b and 55b are engaged with the opposite end edges of the protruding plate portions 74 and 74, respectively. In this state, the non-rotor side case 45c and the rotor side case 46b are non-separably coupled. In addition, the amount of protrusion of both the locking claw pieces 55b and 55b from the outer peripheral surface of the counter rotor side case 45c can be kept small. The function in this state is the same as that in the first example of the embodiment described above.

  On the other hand, when the rotor side case 46b is pushed into the cylinder space 9a while the preload spring 44 is elastically compressed in order to assemble and fix the counter-rotor side auxiliary assembly 59c in the cylinder space 9a. The wide portions 72, 72 provided at the tip portions of the elastic arm pieces 54, 54 reach the opposite rotor side half of the locking holes 51b, 51b. These wide portions 72, 72 pass through the opposite half of the locking holes 51b, 51b and displace to the outer diameter side of the peripheral wall portion 48 of the rotor side case 46b. As a result, the leading end portions of both the locking claw pieces 55b and 55b sufficiently protrude from the outer peripheral surface of the peripheral wall portion 48 and engage with the locking recess 61 formed on the inner peripheral surface of the cylinder space 9a.

In this state, when the force pressing the rotor side case 46b against the rotor side is released, the rotor side case 46b is slightly returned to the rotor side by the elastic force of the preload spring 44, and the both locking claws The pieces 55b and 55b engage with a locking recess 61 formed on the inner peripheral surface of the cylinder space 9a. At the same time, both end portions of the wide portions 72, 72 provided at the distal ends of the elastic arm pieces 54, 54 are outside the projecting plate portions 74, 74 in the radial direction of the anti-rotor side case 45c. Moving. In this state, the locking claw pieces 55b, 55b formed at the opposite end portions of the wide width portions 72, 72 are not displaced inward in the radial direction of the rotor side case 46b. Therefore, also in the structure of this example, after inserting the anti-rotor side auxiliary assembly 59c into the inner part of the cylinder space 9a, as in the case of the structure of the second to third examples of the embodiment described above, Before the rotor side auxiliary assembly 64 including the piston 10a and the like is assembled near the opening of the cylinder space 9a, the anti-rotor side auxiliary assembly 59c is prevented from inadvertently coming out of the cylinder space 9a. it can. In this example, the locking pin 75 prevents the non-rotor side case 45c and the lamp plate 39a from rotating. However, the anti-rotation structure of this portion can also be configured in the same manner as the first to third examples of the above-described embodiment. In other words, with the structure of the first to third examples described above, the detent structure can be the same as that of this example.
Since the configuration and operation of the other parts are the same as those of the first example of the embodiment described above, the same parts are denoted by the same reference numerals, and redundant description is omitted.

[Fifth Example of Embodiment]
21 to 29 show a fifth example of the embodiment of the invention corresponding to claims 1, 3 and 4 . In the case of this example, a pair of locking claw pieces 55c, 55c provided at the opposite end of the rotor side case 46c at the opposite end of the rotor side case 46c at the edge of the peripheral wall 48a constituting the opposite rotor side case 45d. Is engaged and disengaged. For this reason, in the case of this example, the peripheral wall portion 48a is formed in a cylindrical shape. That is, a pair of slit portions 78 and 78 communicating with both axial ends of the peripheral wall portion 48a at two positions on the opposite side 180 degrees in the circumferential direction of the peripheral wall portion 48a are provided on the side opposite to the rotor. It is formed in the axial direction of the case 45d. And the part divided | segmented into the circumferential direction by the said both slit parts 78 and 78 among the said surrounding wall parts 48a is made into the bottom plate part 79 provided in the anti-rotor side edge part among the said anti-rotor side cases 45d. Are connected to each other. Accordingly, regardless of the presence of both the slit portions 78, 78, portions of the peripheral wall portion 48a existing on both sides in the circumferential direction of the slit portions 78, 78 are separated from each other, The relationship never moves. In other words, the width of the slit portions 78 and 78 in the circumferential direction does not change. However, the bottom plate portion 79 is not provided on a portion aligned with both the slit portions 78 and 78 and on both side portions of this portion in the circumferential direction. Therefore, both end portions of the slit portions 78 and 78 of the peripheral edge of the peripheral wall portion 48a on the side opposite to the rotor are exposed in the axial direction.

  Also in the case of this example, both the locking claw pieces 55c and 55c are extended from the two positions on the opposite side of the outer circumferential edge of the rotor side case 46c from the opposite side by 180 degrees with respect to the circumferential direction. A pair of elastic arm pieces 54a and 54a are provided at the tip ends. In addition, the width dimension of the both elastic arm pieces 54a, 54a in the circumferential direction is slightly smaller than the width dimension of the slit portions 78, 78 in the same direction. Both the locking claw pieces 55c and 55c are provided at the distal end portions of the both elastic arm pieces 54a and 54a so that the width dimension in the circumferential direction is larger than the width dimension in the same direction of the both slit portions 78 and 78. The non-rotor side half of the large wide portions 72a, 72a is formed by bending outward in the radial direction of the rotor side case 46c. In the case of this example, between the base end edge of the both wide portions 72a and 72a and the front end edge of the both elastic arm pieces 54a and 54a, from the front end edge of the both elastic arm pieces 54a and 54a, the rotor Continuous portions 80, 80 bent inward with respect to the radial direction of the side case 46c are provided. Therefore, the board portions 81 and 81 which are the rotor-side halves of the both wide portions 72a and 72a are more inward with respect to the radial direction of the rotor-side case 46c than the tips of the elastic arm pieces 54a and 54a. Exists. For this reason, as will be described below, the elastic arm pieces 54a and 54a do not protrude radially inward from the inner peripheral surface of the peripheral wall portion 48a in a state where the anti-rotor side auxiliary assembly 59d is assembled. .

In the case of the structure of this example in which each part is configured as described above, the anti-rotor side auxiliary assembly 59d is assembled by combining the constituent members, and the anti-rotor side auxiliary assembly 59d is further assembled into the cylinder of the caliper 5a. It is incorporated in the space 9a. These operations will be described in order.
First, the constituent members of the non-rotor side auxiliary assembly 59d are combined from the state shown in FIG. Specifically, the ramp plate 39, the cage 37 and the balls 38, 38, the ramp shaft 35, the thrust needle bearing 34, the thrust washer 33, the adjustment nut 24, and the preload spring 44 are placed in the counter rotor side case 45d and the bottom plate. The parts 79 are assembled in order from the side. Next, as shown in FIG. 25, while the preload spring 44 is elastically compressed by the retaining ring portion 53a of the rotor side case 46c, the wide portions 72a and 72a are moved to the anti-rotor of the anti-rotor side case 45d. Displace from the side edge to the side opposite the rotor.

  Then, from this state, both the elastic arm pieces 54a, 54a are elastically pressed in a direction approaching each other, and the two substrate portions 81, 81 are brought into contact with the circumferential wall portion 48a with respect to the radial direction of the anti-rotor side case 45d. It is displaced inward from the inner peripheral surface. Next, the force compressing the preload spring 44 is released, and as shown in FIG. 26, both the substrate portions 81 and 81 enter the inner diameter side of the peripheral wall portion 48a from the opposite rotor side of the peripheral wall portion 48a. Then, both the locking claw pieces 55c and 55c are brought into contact with the opposite end of the peripheral wall 48a on the side opposite to the rotor. Even in this state, since both the elastic arm pieces 54a and 54a do not protrude radially inward from the inner peripheral surface of the peripheral wall portion 48a, the constituent members 39, 37 and 35 including the lamp plate 39 are provided. , 34, 33 can be inserted into the anti-rotor side case 45d without excessive backlash in the radial direction. In addition, the lamp plate 39 is pushed by the two continuous portions 80 and 80 in a state where both the locking claw pieces 55c and 55c are in contact with the edge on the counter rotor side of the peripheral wall portion 48a. , 27 (B), it is separated from the bottom plate portion 79.

As described above, as shown in FIGS. 26 and 27, when the anti-rotor side auxiliary assembly 59d is assembled, the anti-rotor side auxiliary assembly 59d is pushed into the cylinder space 9a. The rotor side case 46c is pressed toward the back end surface 82 from a state in which the bottom plate portion 79 of the counter rotor side case 45d is in contact with the back end surface 82 of the cylinder space 9a. As a result, both the board portions 81 and 81 come out from the inner diameter side of the peripheral wall portion 48a, and both the locking claw pieces 55c and 55c bent from the both board portions 81 and 81 radially outward are connected to the cylinder. It engages with a locking recess 61a formed on the inner peripheral surface of the inner end of the space 9a. As a result, the anti-rotor side auxiliary assembly 59d including the rotor side case 46c is prevented from coming out of the cylinder space 9a. Further, as the substrate portions 81 and 81 come out from the inner diameter side of the peripheral wall portion 48 a, both the substrate portions 81 and 81 and the continuous portions 80 and 80 are more radial than the outer peripheral surface of the lamp plate 39. Displace outward. The lamp plate 39 enters the inner diameter side of the two substrate portions 81 and 81 by the elasticity of the preload spring 44. As a result, even with the structure of this example, the both locking claw pieces 55c and 55c do not come out of the locking recess 61a, and the counter-rotor side auxiliary assembly 59d is carelessly removed from the cylinder space 9a. It can be prevented from coming out.
Since the configuration and operation of the other parts are the same as those of the first example of the embodiment described above, the same parts are denoted by the same reference numerals, and redundant description is omitted.

DESCRIPTION OF SYMBOLS 1, 1a Rotor 2, 2a Support 3, 3a Inner pad 4, 4a Outer pad 5, 5a Caliper 6 Main part 7 Sub part 8 Bolt 9, 9a Cylinder space 10, 10a Piston 11 Sleeve 12, 12a Adjustment mechanism 13, 13a Cam mechanism 14, 14a Caliper claw 15, 15a Parking lever 16 Camshaft 17 Roller 18a-18d Cam surface 19a, 19b Cam member 20, 20a Adjustment spindle 21 Adjustment screw 22 Spring 23 Cylinder section 24 Adjustment nut 25 Adjustment spring 26 Thrust bearing 27 Adjustment rod Portion 28 Multi-threaded male threaded portion 29 Receiving surface 30 Retaining ring 31 Multi-threaded female threaded portion 32 Thrust receiving portion 33 Thrust washer 34 Thrust needle bearing 35 Lamp shaft 36 La Plate plate part 37 Cage 38 Ball 39, 39a Lamp plate 40a, 40b Lamp groove 41 Drive shaft 42 Center hole 43 Through hole 44 Preload spring 45, 45a, 45b, 45c, 45d Counter-rotor side case 46, 46a, 46b, 46c Rotor Side case 47 Cam case 48, 48a Peripheral wall part 49a, 49b Bent plate part 50 Cylindrical part 51, 51a, 51b Locking hole 52 Guide notch 53, 53a Retaining ring part 54, 54a Elastic arm piece 55, 55a, 55b, 55c Engagement Claw piece 56 Stepped portion 57a, 57b Recessed portion 58 Guide protrusion 59, 59a, 59b, 59c, 59d Counter-rotor side auxiliary assembly 60 Receiving hole 61, 61a Locking recess 62 O-ring 63 Sleeve 64 Rotor side auxiliary assembly 65 Locking groove 66 Oil ring 67 Boots 68 Holding plate portion 69 Projection 70 Narrow portion 71, 71a Wide portion 72, 72a Wide portion 73 Communication portion 74 Projection plate portion 75 Locking pin 76 Side edge 77 Step surface 78 Slit portion 79 Bottom plate portion 80 Continuous portion 81 Substrate portion 82 Back end face

Claims (5)

A rotor that rotates together with the wheel, a support that is supported and fixed to the vehicle body adjacent to the rotor, and an inner pad that is supported by the support so as to be axially displaceable with the rotor sandwiched from both sides in the axial direction; An outer pad, a caliper claw for pressing the outer side surface of the outer pad at the outer side end, and a cylinder space that opens toward the inner pad are provided in the inner half, respectively, and the support is displaced in the axial direction. A caliper that is supported, a piston that is fitted inside the opening of the cylinder space so as to be axially displaceable, and a parking mechanism that is provided between the back end surface of the cylinder space and the piston. This parking mechanism has a rotational movement of some parts that rotate in accordance with a swinging displacement of a parking lever provided outside the cylinder space. With it, expand the axial dimension, at the piston in the parking mechanism with disc brake device is intended to press toward the inner pad,
Among the components of the parking mechanism, the parts other than the parts assembled to the piston are supported by the inner side of the inner end of the cylinder space, and the rotor is more than the anti-rotor side case. It is built in between the rotor side case arranged on the side,
Of these two cases, the rotor side case has an elastic arm piece extending from a plurality of locations toward the counter-rotor side in the circumferential direction of the outer peripheral edge, and an anti-rotor side end portion of each elastic arm piece. , it forms a plurality of latching prong pieces which is bent outwardly with respect to the radial direction of the said rotor casing, respectively, a portion of the counter-rotor casing, having an edge which faces the counter-rotor side A locking part is formed ,
Each of the locking claw pieces and each of the locking claw pieces whose diameter of the circumscribed circle is smaller than the inner diameter of the cylinder space before the counter rotor side case and the rotor side case are assembled to a predetermined position of the cylinder space. Based on the engagement with the part, preventing the two cases from separating,
Of these two cases, the anti-rotor side case is fitted into a predetermined position of the inner end of the cylinder space, and further, the rotor side case is assembled to the predetermined position of the cylinder space . The amount of protrusion of each locking claw piece from the outer peripheral surface of the counter-rotor side case is increased by using the elastic force directed radially outward, and the locking claw pieces are connected to the inner periphery of the cylinder space. A disc brake device with a parking mechanism, wherein the case is prevented from coming off from the cylinder space by engaging with a locking recess formed on the surface. The disc brake device with a parking mechanism according to claim 1, wherein each of the locking portions is a locking hole formed in a state of passing through the counter-rotor side case in a radial direction. An inner diameter side of a portion of each elastic arm piece or the rotor side case provided on the side opposite to the rotor in the state where each of the locking claw pieces is engaged with the locking recess. Next, a part of the anti-rotor side case or a part to be incorporated between the anti-rotor side case and the rotor side case is positioned to restrict the displacement of each elastic arm piece inward in the radial direction. The disc brake device with a parking mechanism according to claim 1, wherein the locking claw pieces are prevented from coming out of the locking recess. A compression spring is incorporated between the opposite rotor-side and rotor-side cases, and in a state where the compression spring is compressed by a predetermined amount, each of the locking claw pieces and each of the locking portions are The non-rotor side and the rotor side cases are engaged with each other so as not to be separated from each other, and the compression springs are compressed beyond the predetermined amount, whereby the engagement claw pieces are engaged with the engagement recesses. The disc brake device with a parking mechanism according to any one of Items 1 to 3. Each of the locking claw pieces has a width portion in the circumferential direction of the rotor side case that is larger than the width dimension in the same direction of each elastic arm piece, and the opposite rotor side half of the rotor side case has a diameter of the rotor side case. It is formed by bending outward with respect to the direction, and each locking portion is a locking hole provided at a rotor side end of the anti-rotor side case, and among these locking holes, The width dimension in the circumferential direction of the anti-rotor side case is greater than or equal to the width dimension of the elastic arm piece between the central portion in the circumferential direction of the anti-rotor side case and the rotor side edge of the anti-rotor side case. In a state before the anti-rotor side case is fitted into a predetermined position of the inner end of the cylinder space, and the rotor side case is further assembled to the predetermined position of the cylinder space, Each locking claw piece is each locking Are inserted from the inner side to the outer side in the radial direction of the non-rotor side case, and the two cases are separated from each other by the engagement of the respective circumferential ends of the respective locking claw pieces and the respective locking holes. After the assembly, each of the elastic claw pieces is displaced outwardly with respect to the radial direction of the anti-rotor side case rather than the anti-rotor side case through the communication portions. By engaging the front end of the case with the locking recess, the two cases are prevented from coming out of the cylinder space, and the wide part is arranged outside the communication part with respect to the radial direction of the non-rotor side case. The disc brake device with a parking mechanism according to any one of claims 1 to 4, wherein the locking claw pieces are prevented from coming off from the locking recesses by moving the locking claw pieces to the locking recesses.

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