JP4717848B2 - Friction material assembly for disc brake and its assembly method - Google Patents

Description

  The present invention relates to a disc brake friction material assembly used in, for example, a disc brake device for a railway vehicle, and an assembling method thereof. In particular, the present invention relates to cost reduction and productivity by reducing component parts and improving assembly. The present invention relates to an improvement for realizing the improvement.

  A disc brake device includes a disc rotor fixed to an axle, a torque receiving plate disposed opposite to the disc rotor, and an actuator that drives the torque receiving plate to advance and retract toward the disc rotor. It consists of a fixed brake caliper and a lining member that is assembled to the disk rotor side surface of the torque receiving plate. When the torque receiving plate is advanced to the disk rotor side and the lining member is pressed against the disk rotor, Braking torque is generated by sliding friction.

  In the disk brake device for railway vehicles, the disk rotor and brake lining are large, so if the lining member to be pressed against the disk rotor is formed as an integral part, it is non-contact due to undulations generated in the disk rotor due to frictional heat, etc. Therefore, the stable friction area cannot be maintained, and stable braking characteristics cannot be obtained.

  Therefore, in order to solve such problems, the applicant of the present application has already proposed a friction material assembly suitable for a railway vehicle disc brake device having the following configuration.

  The disc brake friction material assembly includes a plurality of lining assemblies in which a back plate is fixed to a friction material pressed against a disc rotor, and a substantially disc shape having a smaller outer shape than the back plate. A torque transmission ring coupled to the guide plate, a guide plate having a plurality of guide holes into which the torque transmission ring is pivotably fitted, and receiving a braking torque acting on the lining assembly via the torque transmission ring, and a guide hole It has a larger outer shape and is placed on the guide hole from the opposite side to the lining assembly and is connected to the lining assembly, so that the lining assembly and the torque transmission ring are rotatably held on the guide plate. A leaf spring, a torque receiving plate that supports the guide plate and receives a braking torque acting on the guide plate, and a back surface of the plurality of lining assemblies A structure comprising a plurality of abutting back surface abutting portions and a plate abutting portion abutting against the torque receiving plate, and a link plate for transmitting a pressing force between the lining assembly and the torque receiving plate. (For example, see Patent Document 1).

  In the friction material assembly for a disc brake having such a configuration, each lining assembly that is pressed against the disc rotor during braking follows the undulation of the disc rotor surface and makes contact with the disc rotor surface by an individual turning operation. The stable friction area can be maintained, and the stable braking characteristic can be maintained.

  In addition, the member that receives the braking torque from the lining assembly and the member that receives the pressing force are set separately, and the braking torque that is a large load is a small contact portion between the members that transmit the pressing force (for example, the link plate and the like). It does not act on the curved contact portion between the lining assembly and the like. Therefore, it is not necessary for each contact portion that transmits the pressing force to be a solid engagement such as a ball joint that receives the braking torque, and it is possible to realize cost saving and productivity improvement by relaxing processing accuracy.

JP 2006-307895 A

However, in the above-described conventional disc brake friction material assembly, the lining assembly is fastened to the guide plate using separate torque transmission rings and leaf springs, and rivets penetrating these members. As a result, there are many components and the number of assembly processes, which makes it difficult to reduce manufacturing costs.
In addition, since the assembly of the lining assembly to the guide plate includes a rivet caulking process using a dedicated processing apparatus, the assembly process becomes complicated and it is difficult to improve productivity. .

  An object of the present invention is to solve the above-mentioned problems, and the lining assembly can be assembled to the guide plate with a small number of parts, and the lining assembly can be easily assembled to the guide plate, reducing the number of parts. Another object of the present invention is to provide a disc brake friction material assembly and a method for assembling the same that can reduce manufacturing costs and improve productivity by reducing the number of assembly steps.

The above object is achieved by the following configuration.
(1) for a disc brake friction member assembly according to the present invention, and the lining assembly back plate is secured to the back surface of the friction member, and torque transmission ring coupled to the back plate is formed in a disk shape A guide plate having a guide hole into which the torque transmission ring is pivotably fitted, a plate spring for rotatably holding the lining assembly and the torque transmission ring in the guide hole of the guide plate, and the guide plate The lining assembly includes a torque receiving plate that receives braking torque acting on the guide plate and supports the lining assembly, a back surface contact portion that contacts the lining assembly, and a plate contact portion that contacts the torque receiving plate. A friction material assembly for a disc brake, comprising: a link plate for transmitting a pressing force between a solid body and the torque receiving plate;
The torque transmission ring is integrally formed with the back plate,
The torque transmission ring is integrally formed with a connecting shaft portion that fits into a fitting hole formed in the leaf spring, and a pressing piece that extends in a radial direction from a part of the distal end side of the connecting shaft portion. ,
The leaf spring is provided with a notch through which the presser piece is inserted in a part of the peripheral edge of the fitting hole, and the position of the notch is aligned with the position of the presser piece, and the connecting shaft part and After inserting the presser piece into the fitting hole, the leaf spring and the connecting shaft portion are relatively rotated to prevent the leaf spring from coming off from the connecting shaft portion ,
The peripheral edge of the fitting hole of the leaf spring is formed in a rotation restricting recess formed in the torque transmission ring when it is prevented from coming off from the connecting shaft portion by relative rotation with the connecting shaft portion. Overlapping local openings are formed,
The rotation restricting protrusion integrally formed on the back surface abutting portion of the link plate is fitted into the local opening and the rotation restricting recess which are overlapped with each other .

(2) In the configuration described in the above (1), said plate spring, it is provided cut into the outer peripheral portion, wherein the ground portion to the guide plate of the outer peripheral portion is divided into a plurality .

( 3 ) A method for assembling the disc brake friction material assembly according to the present invention is the method for assembling the disc brake friction material assembly according to any one of (1) and (2 ) above.
In the plurality of lining assemblies, the torque transmission ring is fitted into the guide hole of the guide plate, and the leaf springs are prevented from being detached from the connecting shaft portions protruding to the back side of the guide plate. Then, it is introduced into the assembly line as a subassembly integrated with the guide plate.

In the friction material assembly for a disc brake described above, after the lining assembly is assembled to the guide plate, the torque transmission ring integrally formed on the back surface of the lining assembly is fitted into the guide hole of the guide plate. The leaf spring may be connected to the connecting shaft portion protruding to the back side of the guide plate, and the lining assembly can be assembled to the guide plate with a small number of components.
Further, the leaf spring is connected to the connecting shaft portion by aligning the position of the notch formed in the peripheral edge portion of the fitting hole of the leaf spring with the position of the presser piece extending to the distal end side of the connecting shaft portion. After inserting the connecting shaft part into the fitting hole, the connecting shaft part and the leaf spring can be rotated relative to each other to shift the position of the presser piece from the notch position. Therefore, the lining assembly can be easily assembled to the guide plate.
Therefore, the manufacturing cost can be reduced and the productivity can be improved by reducing the number of parts and the number of assembly processes.

Preferred embodiments of a disc brake friction material assembly according to the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a perspective view seen from the front side of an embodiment of a disc brake friction material assembly according to the present invention, FIG. 2 is a front view of the disc brake friction material assembly shown in FIG. 1, and FIG. 1 is a perspective view of the friction material assembly for a disc brake shown in FIG. 1 as viewed from the back side, FIG. 4 is a back view of the friction material assembly for a disc brake shown in FIG. 3, and FIG. 6 is an exploded perspective view of the disc brake friction material assembly shown in FIG. 3, FIG. 7 is an explanatory view of a process of connecting a leaf spring to the lining assembly, and FIG. 8 is a drawing showing the pressing force from each lining assembly. FIG. 9 is a cross-sectional view taken along line BB in FIG. 8, FIG. 10 is a cross-sectional view taken along line CC in FIG. 8, and FIG. 11 is a cross-sectional view taken along line DD in FIG.

  The disc brake friction material assembly 1 includes a plurality of lining assemblies 5 in which a back plate 4 is fixed to the back surface of a friction material 3 that is pressed against a disc rotor (not shown), and an approximately smaller outer shape than the back plate 4. A lining assembly having a torque transmission ring 7 formed in a disc shape and connected to the center of the back plate 4, and five guide holes 11 into which an outer peripheral surface 7a of the torque transmission ring 7 is pivotably fitted. Guide plate 12 that receives braking torque acting on 5 via torque transmission ring 7, and has a larger outer shape than guide hole 11, and is placed on guide hole 11 from the opposite side to lining assembly 5. A plate spring 15 that supports the lining assembly 5 and the torque transmission ring 7 on the guide plate 12 by being connected to the assembly 5 and that supports the guide plate 12 while supporting the guide plate 12. 2, a torque receiving plate 17 that receives braking torque acting on 2, a plurality of back surface abutting portions (back surface abutting curved surface portions) 21 that abut on the back surface of the plurality of lining assemblies 5, Two plate plates 24 and 25 that include one plate contact portion 22 and transmit a pressing force between the lining assembly 5 and the torque receiving plate 17 are provided.

  The friction material 3 has a disk shape, and the back plate 4 fixed to the back surface of the friction material 3 also has a disk shape with the same diameter as the friction material 3.

In the case of the present embodiment, the torque transmission ring 7 has a disk shape smaller in diameter than the back plate 4 and is integrally formed with the back plate 4 as shown in FIGS. 6 and 9.
As shown in FIG. 9, the outer peripheral surface 7 a of the torque transmission ring 7 is formed as a convex curved surface that makes point contact with the inner peripheral surface of the guide hole 11. By fitting into the guide hole 11 with this curved surface, it is supported so as to be able to turn (swing) in the direction indicated by the arrow X in the figure. This turning behavior is necessary in order for the friction material 3 to follow the undulation generated in the disk rotor and maintain the contact area.

Then, on the back surface (the surface opposite to the lining assembly 5) of the torque transmission ring 7, a connecting shaft portion that is formed to project in a square bar shape having a smaller diameter than the torque transmission ring 7 as shown in FIGS. 6 and 7. 27 and a presser piece 28 extending in a radial direction from a part of the distal end side (the side opposite to the torque transmission ring 7) of the connecting shaft portion 27 are integrally formed.
By providing the presser piece 28, a groove is formed between the presser piece 28 and the torque transmission ring 7 that faces the presser piece 28 so that a peripheral edge portion of a fitting hole 31 of a leaf spring 15 to be described later can be interrupted. .

As shown in FIG. 7A, the torque transmission ring 7 is formed with a rotation restricting recess 32 in an empty space around the connecting shaft portion 27.
In the case of the present embodiment, the rotation restricting recess 32 is a circular fitting hole.

As shown in FIGS. 7 and 10, the connecting shaft portion 27 is rotatably fitted in a circular fitting hole 31 formed in the leaf spring 15.
As shown in FIG. 7A, the leaf spring 15 is continuously provided with a notch 33 through which the presser piece 28 is inserted in a part of the peripheral portion of the fitting hole 31.

  By providing this notch 33, as shown in FIG. 7A, the position of the notch 33 is aligned with the position (orientation) of the presser piece 28, and the connecting shaft portion 27 and the presser piece 28 are fitted to the fitting hole. 7 (b), the leaf spring 15 is rotated in the direction of the arrow Y to cause relative rotation between the lining assembly 5 and the leaf spring 15, as shown in FIG. 7 (c). When generated, the peripheral edge portion of the fitting hole 31 cuts into a groove-like portion between the presser piece 28 and the torque transmission ring 7 facing the presser piece 28, and the leaf spring 15 is prevented from coming off from the connecting shaft portion 27. .

  As shown in FIG. 7 (c), the leaf spring 15 is rotated about 90 ° relative to the leaf spring 15 and the leaf spring 15 is prevented from being detached from the linkage shaft 27. When this occurs, a local opening (inner diameter recess) 35 is formed that overlaps the rotation restricting recess 32 formed in the torque transmission ring 7.

As shown in FIGS. 8 and 9, the leaf spring 15 has an outer peripheral portion 15a that is in contact with the guide plate 12 and exhibits spring properties by bending (elastic) deformation between the outer peripheral portion and the inner peripheral portion. As shown to 7 (a), the notch 37 is provided in four places of an outer peripheral part, and the grounding part to the guide plate 12 of the said outer peripheral part is divided | segmented into plurality.
When the leaf spring 15 is changed from the state shown in FIG. 7B to the state shown in FIG. 7C, the leaf spring fitted to the connecting shaft portion 27 as shown in FIG. 7B. 7 is pressed toward the guide plate 12 to bring the leaf spring 15 into an elastically deformed state, and the leaf spring 15 is rotated by 90 ° with respect to the connecting shaft portion 27 in that state. Set to the state shown in c).

  The guide plate 12 of the present embodiment has five guide holes 11, and after the torque transmission ring 7 of the lining assembly 5 is fitted in each guide hole 11, each lining assembly 5 is fitted. When the leaf spring 15 fitted to the connecting shaft portion 27 protruding from the torque transmission ring 7 is brought into a retaining state as shown in FIG. 7C, the five lining assemblies 5 are attached to the guide plate 12. The integrated subassembly 41 is finished (with the link plates 24 and 25 removed in FIG. 8).

  As a method of assembling the disc brake friction material assembly 1 of the present embodiment, the lining assemblies 5 are assembled in all the guide holes 11 of the guide plate 12 as described above, and the five lining assemblies 5 are guided in advance. After the subassembly 41 integrated with the plate 12 is introduced into the assembly line, the link plates 24 and 25 are assembled from the back side of the guide plate 12 as shown in FIG. An assembly method in which the torque receiving plate 17 is completed by fastening it to the guide plate 12 is employed.

  As shown in FIG. 8, the link plate 24 presses the two lining assemblies 5 held by the guide plate 12 so that the pressing force can be transmitted, and abuts against the back surface of each lining assembly 5 at both ends. A back contact portion 21 is provided, and a single plate contact portion 22 that contacts the torque receiving plate 17 is provided so as to be positioned between the two back contact portions 21.

  As shown in FIG. 10, the back surface abutting portion 21 abuts the curved surface portion 21 a protruding toward the lining assembly 5 to the center of the top portion of the connecting shaft portion 27, so that the lining assembly indicated by the arrow X in FIG. It is possible to transmit a pressing force to / from the lining assembly 5 without impairing the turnability of the three-dimensional body 5.

  As shown in FIG. 11, the plate abutting portion 22 abuts against the torque receiving plate 17 by causing the curved surface portion 22a protruding toward the torque receiving plate 17 to abut against the torque receiving plate 17. Thus, it is possible to transmit a pressing force to and from the torque receiving plate 17.

As shown in FIG. 8, the link plate 25 presses the three lining assemblies 5 held by the guide plate 12 so that the pressing force can be transmitted, and the arm-shaped tip extending in three directions from the center. A back contact portion 21 that contacts the back surface of each lining assembly 5 is provided on the side, and a single plate contact portion 22 that contacts the torque receiving plate 17 is provided so as to be positioned at the center. .
The structures of the back contact portion 21 and the plate contact portion 22 are the same as the back contact portion 21 and the plate contact portion 22 in the link plate 24 described above.

  These link plates 24 and 25 are formed with light holes 23 penetratingly formed so as to reduce the weight.

  As shown in FIGS. 6 and 8, the back surface abutting portion 21 of each link plate 24, 25 is a plate in a laminated state when it abuts on the back surface of the lining assembly 5 held by the guide plate 12. A pair of rotation restricting projections (rotation restricting claw) 43 for restricting the rotation of the spring 15 and the torque transmission ring 7 is provided.

  The rotation restricting projections 43 provided on each of the link plates 24 and 25 are locking claws obtained by bending projecting pieces extending on both sides of the back surface contact portion 21 to the lining assembly 5 side, as shown in FIG. As shown in c), the rotation is performed by restricting the rotation of the lining assembly 5 and the leaf spring 15 by engaging with the overlapping local opening 35 and the rotation restricting recess 32.

As shown in FIG. 8, the torque receiving plate 17 is connected to the back surface of the guide plate 12 with the link plates 24 and 25 set on the lining assemblies 5 held on the guide plate 12.
As shown in FIG. 6, through-holes 46 for riveting are formed at appropriate intervals on the outer peripheral portions of the guide plate 12 and the torque receiving plate 17, and the guide plate 12 and the torque receiving plate in which the outer peripheral portions are overlapped with each other. As shown in FIGS. 1 and 11, 17 is firmly connected and fixed by a rivet 47 inserted through the through hole 46.

In the case of the present embodiment, as shown in FIG. 6, the torque receiving plate 17 includes an anchor plate assembly in which the anchor plate 48 is fixed in advance by a rivet 49 and the torque receiving plate 17 and the anchor plate 48 are integrated. It is handled in the form of a solid 50.
The anchor plate 48 is fixed to a friction material mounting means that is driven forward and backward by the actuator toward the disk rotor in the vehicle-side disk brake device.

  As shown in FIG. 11, in the assembled state where the torque receiving plate 17 is fixed to the guide plate 12, the plate contact portions 22 of the link plates 24, 25 are in contact with the inner surface of the torque receiving plate 17 so as to be rotatable. A pressing force transmitted to the torque receiving plate 17 via an actuator of a disc brake device (not shown) is transmitted to each lining assembly 5 through the plate contact portion 22 and the back surface contact portion 21, and the friction material 3 The reaction force of the pressing force when the disk rotor is pressed by the disk rotor is transmitted from the lining assembly 5 through the back surface contact portion 21 and the plate contact portion 22 and is received by the torque receiving plate 17.

  On the other hand, during braking, the braking torque acting on the lining assembly 5 from the disk rotor is guided from the outer peripheral surface 7a of the torque transmission ring 7 integrated with the lining assembly 5 to the guide plate 12 to which the torque transmission ring 7 is fitted. Is transmitted to the anchor plate 48 via the torque receiving plate 17 fixed to the guide plate 12.

  In the disc brake friction material assembly 1 according to the embodiment of the present invention described above, the torque transmission ring integrally formed on the back surface of the lining assembly 5 is assembled to the guide plate 12 of the lining assembly 5. 7 is fitted into the guide hole 11 of the guide plate 12, and then, as shown in FIG. 7, the leaf spring 15 is connected to the connecting shaft portion 27 protruding to the back side of the guide plate 12. Therefore, the lining assembly 5 is assembled to the guide plate 12 with a small number of components.

Further, in the disc brake friction material assembly 1 of the present embodiment, the connection of the leaf spring 15 to the connection shaft portion 27 is performed by the position of the notch 33 formed in the peripheral edge portion of the fitting hole 31 of the leaf spring 15. In accordance with the position of the presser piece 28 extending to the distal end side of the connecting shaft portion 27, the connecting shaft portion 27 is inserted into the fitting hole 31, and then the connecting shaft portion 27 and the leaf spring 15 are relatively rotated. Therefore, it is only necessary to shift the position of the presser piece 28 from the position of the notch 33, and the work can be performed without using a caulking processing device, so that the assembly of the lining assembly 5 to the guide plate 12 is facilitated. .
Therefore, the manufacturing cost can be reduced and the productivity can be improved by reducing the number of parts and the number of assembly processes.

In the disc brake friction material assembly 1 of the present embodiment, the lining assembly 5 and the leaf spring 15 assembled to the guide plate 12 are in a state where the leaf spring 15 is prevented from coming off from the connecting shaft portion 27. The rotation restricting recess 32 formed in the torque transmission ring 7 integral with the assembly 5 and the local opening 35 formed in the leaf spring 15 overlap, and the rotation restricting recess 32 and the local opening overlap each other. The rotation restricting protrusions 43 formed integrally with the link plates 24 and 25 are fitted into the portion 35 to restrict the rotation of the lining assembly 5 and the leaf spring 15.
Therefore, after the link plates 24 and 25 are assembled, the leaf spring 15 can be prevented from rotating and dropping off relative to the connecting shaft portion 27, and the lining assembly 5 can be prevented from rotating during braking operation. Thus, stable braking performance can be maintained.

  Further, in the disc brake friction material assembly 1 of the present embodiment, the leaf spring 15 is divided into a plurality of grounding portions to the guide plate 12 by the notches 37 of the outer peripheral portion 15a as shown in FIG. Therefore, elastic deformation as a spring is facilitated, and by adjusting the size and shape of the notch 37, the elastic characteristics as a spring can be easily adjusted.

  Further, as described above, in the method of assembling the disc brake friction material assembly 1 of the present embodiment, the assembly line is formed as the subassembly 41 in which the plurality of lining assemblies 5 are assembled in advance and integrated with the guide plate 12. As a result, the assembly process can be simplified and productivity can be provided.

  In the friction material assembly for a disc brake according to the present invention, the number of lining assemblies equipped on one guide plate is not limited to the above embodiment. Depending on the required braking performance, the design of the size of the guide plate and the number of lining assemblies on the guide plate can be changed as appropriate.

It is the perspective view seen from the front side of one embodiment of the friction material assembly for disc brakes concerning the present invention. It is a front view of the friction material assembly for disk brakes shown in FIG. It is the perspective view which looked at the friction material assembly for disc brakes shown in Drawing 1 from the back side. FIG. 4 is a rear view of the disc brake friction material assembly shown in FIG. 3. FIG. 3 is a view as seen from an arrow A in FIG. 2. FIG. 4 is an exploded perspective view of the disc brake friction material assembly shown in FIG. 3. It is explanatory drawing of the process of connecting a leaf | plate spring to the lining assembly shown in FIG. FIG. 5 is a rear view in which a torque receiving plate and an anchor plate are removed from the disc brake friction material assembly shown in FIG. 4 and a link plate that receives a pressing force from each lining assembly is exposed. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Friction material assembly for disc brakes 3 Friction material 4 Back plate 5 Lining assembly 7 Torque transmission ring 11 Guide hole 12 Guide plate 15 Leaf spring 17 Torque receiving plate 21 Back surface contact portion 22 Plate contact portion 24, 25 Link plate 27 Connecting shaft portion 28 Presser piece 31 Fitting hole 32 Rotation restricting recess 33 Notch 35 Local opening 37 Notch 43 Rotation restricting protrusion

Claims (3)

Yes and the lining assembly back plate is secured to the back surface of the friction member, and torque transmission ring coupled to the back plate is formed in a disc shape, a guide hole into which the torque transmitting ring is fitted pivotally A guide plate, a leaf spring that rotatably holds the lining assembly and the torque transmission ring in a guide hole of the guide plate, and a torque receiver that receives the braking torque that supports the guide plate and acts on the guide plate. A link that transmits a pressing force between the lining assembly and the torque receiving plate, comprising a plate, a back surface abutting portion that abuts against the lining assembly, and a plate abutting portion that abuts against the torque receiving plate A disc brake friction material assembly comprising a plate,
The torque transmission ring is integrally formed with the back plate,
The torque transmission ring is integrally formed with a connecting shaft portion that fits into a fitting hole formed in the leaf spring, and a pressing piece that extends in a radial direction from a part of the distal end side of the connecting shaft portion. ,
The leaf spring is provided with a notch through which the presser piece is inserted in a part of the peripheral edge of the fitting hole, and the position of the notch is aligned with the position of the presser piece, and the connecting shaft part and After inserting the presser piece into the fitting hole, the leaf spring and the connecting shaft portion are relatively rotated to prevent the leaf spring from coming off from the connecting shaft portion ,
The peripheral edge of the fitting hole of the leaf spring is formed in a rotation restricting recess formed in the torque transmission ring when it is prevented from coming off from the connecting shaft portion by relative rotation with the connecting shaft portion. Overlapping local openings are formed,
A friction material assembly for a disc brake, characterized in that a rotation restricting projection integrally formed on the back surface contact portion of the link plate is fitted into the overlapping local opening and the rotation restricting recess . 2. The disc brake friction material assembly according to claim 1, wherein the leaf spring is provided with a notch in an outer peripheral portion, and a grounding portion of the outer peripheral portion to the guide plate is divided into a plurality of portions. . A method for assembling a friction material assembly for a disc brake according to claim 1 or 2,
  In the plurality of lining assemblies, the torque transmission ring is fitted into the guide hole of the guide plate, and the leaf springs are prevented from being detached from the connecting shaft portions protruding to the back side of the guide plate. A method of assembling a friction material assembly for a disc brake, wherein the assembly is introduced into an assembly line as a subassembly integrated with the guide plate.

Images