JP6595420B2 - Brake disc mounting structure - Google Patents

Description

  The present invention relates to a brake disc mounting structure used in a disc brake device such as a motorcycle, and more specifically, a brake disc having a mounting hole penetrating in a plate thickness direction is inserted into the mounting hole with respect to a wheel. It relates to what is attached with a fixing bolt through a collar.

  This type of brake disk mounting structure is known from Patent Document 1, for example. In this case, the collar includes a cylindrical portion that is inserted into the mounting hole and a flange portion that is formed so as to project outward in the radial direction at the rear end portion in the insertion direction of the collar with respect to the mounting hole.

  When the brake disc is attached to the wheel, the brake disc is positioned and set with respect to the wheel from one side in the axial direction, and the disc spring as biasing means is aligned and set with respect to the brake disc. Next, the collar is inserted into the disc spring and the mounting hole of the brake disc with the one end in the axial direction where the flange portion is not formed at the head, and in this state the shaft portion of the fixing bolt is attached to the wheel. By fastening, the brake disc is attached to the wheel. As a result, the disc spring is sandwiched between the flange portion of the collar and the other axial surface of the brake disc, and the brake disc can be displaced in the axial direction against the urging force of the disc spring against the wheel.

  However, when the motorcycle is assembled, if the brake disc is attached to the wheel according to the above procedure, the collar and the disc spring are separated from the brake disc. Therefore, the collar and the disc spring are set at predetermined positions, respectively. There is a problem that it is necessary and workability is poor.

JP 2010-270888 A

  The present invention has been made in view of the above points, and is a brake disc that can improve the workability of mounting a brake disc when assembling a motorcycle with a collar and a disc spring pre-assembled to the brake disc. The problem is to provide a mounting structure.

  In order to solve the above-mentioned problem, the brake disk mounting structure of the present invention, in which a brake disk having a mounting hole penetrating in the thickness direction is attached to the wheel by a fixing bolt through a collar inserted into the mounting hole. The brake disc is attached to the wheel so that it can be displaced in the axial direction against the urging force of the urging means, and one of the axial directions of the brake disc is attached to one end of the outer peripheral surface of the collar. A flange part that faces the surface is provided, and the collar can be inserted into the mounting hole and biasing means of the brake disk with the other end in the axial direction at the top, and a caulking part is formed at the other end in the axial direction of the collar Thus, the collar is pre-assembled with the brake disc and the urging means sandwiched between the flange portion and the caulking portion.

  According to the present invention, since the collar is pre-assembled with the brake disc and the biasing means sandwiched between the flange portion and the caulking portion, the brake disc is attached to the wheel when the motorcycle is assembled. After positioning and setting, the brake disc is attached to the wheel simply by fastening the shaft portion of the fixing bolt to the wheel. For this reason, the workability | operativity of the brake disc attachment at the time of the assembly of a motorcycle can be improved.

  In the present invention, it is preferable that the urging means is interposed between the other axial surface of the brake disc and the caulking portion. This is advantageous because it is possible to easily confirm the mounting state of the urging means and the crimped state of the collar tip portion in advance.

  In the present invention, it is preferable that a plate-like member is interposed between the flange portion and one surface in the axial direction of the brake disc. According to this, when attaching a brake disc with respect to a wheel, it may prevent that a flange part and a brake disc are damaged. In this case, the plate-like member may be a sensor plate for speed detection.

  Further, in the present invention, an annular step portion projecting radially inward is provided at one end portion in the axial direction of the collar, and the head portion of the fixing bolt is seated, and is fixed to the inner periphery of the step portion. It is preferable that the shaft portion of the bolt can be inserted, and that the head portion is immersed in the collar in a state where the head portion of the fixing bolt is seated on the step portion. According to this, it is possible to eliminate the part protruding to the other surface side of the brake disc, which is advantageous.

1 is a front view of a front wheel of a motorcycle that employs a brake disk mounting structure according to an embodiment of the present invention. (A) is a front view of a brake disc with a collar pre-assembled, and (b) is a cross-sectional view taken along line IIb-IIb in (a). Sectional drawing which follows the III-III line of FIG. (A) is a fragmentary sectional view explaining the attachment structure of the brake disc concerning a modification, (b) is a partial front view of the sensor plate for speed detection. (A)-(c) is sectional drawing which shows the attachment state of the sensor plate which concerns on another modification.

  Hereinafter, an embodiment in which a brake disk mounting structure of the present invention is applied to a front wheel of a motorcycle will be described with reference to the drawings.

  Referring to FIG. 1, FW is a front wheel of a motorcycle, and front wheel FW includes a wheel We rotatably supported on a shaft Fs suspended on a front fork Ff via a bearing (not shown), And a tire Tr mounted on the outer periphery of the We. In FIG. 1, Cp is a caliper as a component of the brake device. In addition, since a well-known thing can be utilized as a wheel We and a brake device, the further description is abbreviate | omitted. Then, the brake disc 1 is attached to the predetermined position on both sides in the axial direction of the wheel We by the fixing bolt 3 via the collar 2.

  As shown in FIGS. 2 (a) and 2 (b), the brake disc 1 is made of, for example, a stainless steel plate and is formed in an annular shape. A plurality of through holes (open holes) 11 are provided. A plurality of tongue-like (rectangular front view) projecting pieces 12 extending inward in the radial direction are formed on the inner peripheral edge of the brake disc 1 at predetermined intervals in the circumferential direction. Each protruding piece 12 is formed with a circular mounting hole 13 in a front view that penetrates in a plate thickness direction that coincides with the axial direction, through which a later-described collar is inserted. 2A, the attachment hole 13 located on the right side is shown with the collar 2 removed. In the following, with reference to the direction in which the brake disc 1 is attached to the wheel We, one surface of the brake disc 1 facing the wheel We is defined as one axial surface 1a and the opposite surface as the other axial surface 1b. And

  The collar 2 includes a cylindrical collar body 21 that is slightly smaller than the inner diameter of the mounting hole 13. The axial length of the collar body 21 is set to be longer than the plate thickness of the brake disc 1, and the collar body 21 is fitted with a disc spring 4 and a washer 5 as urging means, as will be described later. It is set so that the caulking portion 22 can be formed at the tip. A flange portion 23 is formed at one end in the axial direction of the outer peripheral surface of the collar body 21 so as to face the one surface 1 a in the axial direction of the brake disc 1. A radial direction in which a head portion 31 of a fixing bolt 3 to be described later is seated at one end portion in the axial direction of the inner peripheral surface of the collar body 21 and a shaft portion 32 of the fixing bolt 3 is freely inserted. An annular stepped portion 24 projecting inward is formed. In this case, one surface in the axial direction of the flange portion 23 and the step portion 24 is made flush.

  The fixing bolt 3 includes a head portion 31 and a shaft portion 32 having a thread on the outer peripheral surface, and the head portion 31 is in a state where the head portion 31 of the fixing bolt 3 is seated on the step portion 24. It is designed to be immersed in. 2 (a) and 2 (b), 4 is a disc spring and 5 is a washer. Since these parts can be known, detailed description is omitted here. In this embodiment, the brake disk 1, the disc spring 4, and the washer 5 are disposed between the flange portion 23 and the caulking portion 22 by forming the caulking portion 22 at the other end in the axial direction of the collar 2. The collar 2 is pre-assembled in a sandwiched state. The pre-assembly procedure will be specifically described below.

  The collar body 21 is inserted into the mounting hole 13 of the brake disc 1 with the other end in the axial direction at the head, and the flange portion 23 is brought into surface contact with one surface 1 a in the axial direction of the brake disc 1. Next, the disc spring 4 and the washer 5 are sequentially inserted on the end of the collar body 21 protruding outward from the other axial surface 1b of the brake disc 1, and the other axial direction of the collar body 21 is detected by a known caulking device. The caulking portion 22 is formed at the end portion of the. Thereby, the collar 2 is pre-assembled in a state where the brake disc 1, the disc spring 4 and the washer 5 are sandwiched between the flange portion 23 and the caulking portion 22 (see FIG. 2B). Then, as shown in FIG. 3, after the brake disc 1 with the collar 2 pre-assembled is positioned and set with respect to the wheel We (in this state, the flange portion 23 and the step portion 24 of the collar 2 are When the shaft portion 32 of the fixing bolt 3 is fastened to a boss portion (not shown) formed at a predetermined position of the wheel We, the attachment is completed (see FIG. 3).

  According to this embodiment, when the motorcycle 1 is assembled, the brake disc 1 is positioned and set with respect to the wheel We, and then the brake disc 1 can be mounted only by fastening the shaft portion 32 of the fixing bolt 3 to the wheel We. It is attached to the wheel We. For this reason, the workability | operativity of the brake disc 1 attachment at the time of the assembly of a motorcycle can be improved. Since the disc spring 4 is interposed between the other axial surface 1b of the brake disc 1 and the caulking portion 24, for example, before the brake disc 1 is attached to the wheel We, the disc spring 4 The assembled state and the crimped state of the tip of the collar 2 can be easily confirmed, which is advantageous. Furthermore, since the head portion 31 is configured to be immersed in the collar body 21, it is possible to eliminate the part protruding to the other surface side of the brake disc 1, which is advantageous.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said thing. In the said embodiment, although the disk spring 4 as an urging | biasing means was interposed as an example between the axial direction other surfaces 1b of the brake disc 1, and the crimping | crimped part 22, it was not limited to this. Alternatively, the disc spring 4 can be interposed between the one axial surface 1 a of the brake disc 1 and the flange portion 23. Further, the urging means is not limited to a disc spring, and a waving washer or a leaf spring can be used. Furthermore, as a modification of the above embodiment, as shown in FIG. 5A, a plate-like member can be interposed between the flange portion 23 and one surface 1 a in the axial direction of the brake disc 1. Thereby, when attaching the brake disc 1 with respect to the wheel We, it can prevent that the flange part 23, the step part 24, or the brake disc 1 gets damaged, and is advantageous.

  Here, when the anti-lock brake system (ABS) is mounted on the motorcycle, the plate-like member is detected at a predetermined interval in the circumferential direction as shown in FIGS. 4 (a) and 4 (b). It can be set as the annular speed detection sensor plate 6 in which the hole 61 is opened. Since a well-known anti-lock brake system can be used, detailed description thereof is omitted here. A plurality of tongue-like (rectangular front view) projecting pieces 62 extending inward in the radial direction are formed on the sensor plate 6 at predetermined intervals in the circumferential direction so as to correspond to the projecting pieces 12 of the brake disc 1. Each of the holes 62 is formed with a circular attachment hole 63 penetrating in the thickness direction.

  When the brake disk 1 is mounted on the wheel We with the sensor plate 6 interposed, the sensor plate 6 is positioned and set on the wheel We, and then the brake disk 1 on which the collar 2 is pre-assembled is positioned. After setting, the shaft portion 32 of the fixing bolt 3 is inserted into the collar 2 and the mounting hole 63 and fastened to a boss portion (not shown) formed at a predetermined position of the wheel We to complete the mounting. .

  In the above modification, the sensor plate 6 is interposed when the brake disk 1 is attached to the wheel We. However, when the collar 2 is pre-assembled on the brake disk 1, the sensor plate 6 is used. May be pre-assembled at the same time. In this case, as shown in FIG. 5 (a), the sensor plate 6 is placed between the flange portion 23 of the collar 2 and one surface 1a in the axial direction of the brake disc 1, or as shown in FIG. 5 (b). The sensor plate 6 can be interposed between the other axial surface 1 b of the brake disc 1 and the disc spring 4. On the other hand, as shown in FIG. 5C, a sensor plate 6 can be provided instead of the washer 5.

  DESCRIPTION OF SYMBOLS 1 ... Brake disc, 13 ... Mounting hole, 2 ... Collar, 22 ... Caulking part, 23 ... Flange part, 24 ... Step part, 3 ... Bolt, 31 ... Head part, 32 ... Shaft part, 4 ... Belleville spring (biasing) Means), 6 ... sensor plate (plate-like member), We ... wheel.

Claims (5)

A brake disk mounting structure in which a brake disk having a mounting hole penetrating in the plate thickness direction is attached to a wheel by a fixing bolt through a collar inserted into the mounting hole.
In the brake disc attached to the wheel so that it can be displaced in the axial direction against the biasing force of the biasing means,
A flange portion facing one axial surface of the brake disc is provided at one end in the axial direction of the outer peripheral surface of the collar. The collar is attached to the brake disc mounting hole and attached with the other end in the axial direction at the top. The collar can be inserted into the biasing means, and a collar is formed in the state where the brake disk and the biasing means are sandwiched between the flange portion and the biasing means by forming a crimped portion at the other end in the axial direction of the collar Brake disk mounting structure characterized by being attached.   2. The brake disk mounting structure according to claim 1, wherein the urging means is interposed between the other axial surface of the brake disk and the caulking portion.   3. The brake disk mounting structure according to claim 1, wherein a plate-like member is interposed between the flange portion and one surface in the axial direction of the brake disk.   4. The brake disk mounting structure according to claim 3, wherein the plate-like member is a sensor plate for speed detection. One end of the collar in the axial direction is provided with an annular stepped portion projecting radially inward, on which the head of the fixing bolt sits, and the shaft portion of the fixing bolt is inserted into the inner periphery of the stepped portion. 5. The apparatus according to claim 1, wherein the head is configured to be immersed in the collar in a state where the head of the fixing bolt is seated on the stepped portion. The brake disc mounting structure described.

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