JP6547722B2 - Disc brake device - Google Patents

Description

  The present invention relates to a disk brake device.

  In the disc brake device, a protective member is provided to the caliper in order to prevent foreign matter such as rock or earth and sand from entering the protection target site. For example, the disk brake device described in JP 2009-222171 A includes, as a protective member, a cover that partially covers the outer side in the radial direction of the rotor (disk rotor) among calipers.

JP, 2009-222171, A

  However, in the above-mentioned disc brake device, since the cover extends in the circumferential direction of the rotor, there is a problem that the device becomes large. In addition, even in a configuration having a slide pin for making the caliper moveable with respect to the mount, the slide pin between the caliper and the mount or an outer peripheral member such as a pin boot mounted on the outer peripheral side of the slide pin The protective member is provided on the caliper to prevent foreign matter from entering between the caliper and the mount. Also in this case, since the slide pins are disposed at both ends of the caliper in the circumferential direction of the rotor, the protective members extend in the circumferential direction of the rotor, causing the same problem as described above.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a disk brake device capable of achieving both the suppression of the entry of foreign matter into between the caliper and the mount and the downsizing. .

  In the disk brake device according to the present invention, the caliper is slidably supported in the axial direction of the rotor with respect to the mount in a state where the slide pin fixed to the caliper is inserted into the pin guide hole provided in the mount In the constructed disk brake device, the slide pin is disposed separately to the slide pin located on the turning-in side of the rotor and the slide pin located on the turning-out side of the rotor, or And a protective member attached to any one of the slide pin located on the rotating side of the rotor and the slide pin located on the rotating side of the rotor, the slide pin having a head located outside the caliper And a shaft portion extending from the head portion, and the shaft portion can be inserted into a screwing portion to be screwed into the caliper and the pin guide hole The protective member is extended from the mounting portion and the mounting portion held by the head and the caliper in a state in which the shaft portion is inserted, and the caliper And a protective portion disposed on an outer peripheral side of the slide portion positioned between the mounts.

  According to the present invention, it is not necessary to greatly extend the protective member in the circumferential direction of the rotor since the protective members independent of each slide pin are installed. As a result, the protective member can be miniaturized, and in turn, the disk brake device can be miniaturized. In addition, the protective portion is disposed on the outer peripheral side of the slide portion located between the caliper and the mount, so that at least a part between the caliper on which the slide pin is disposed and the mount is covered by the protective portion. This can suppress the entry of foreign matter between the caliper and the mount. According to the present invention, it is possible to achieve both the suppression of the entry of foreign matter into the space between the caliper and the mount and the downsizing.

It is a block diagram which shows the structure of the disc brake apparatus of 1st embodiment. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is a conceptual diagram which shows the structure of the slide pin 4 of 1st embodiment. It is a perspective view showing composition of a protection member of a first embodiment. It is a front view (figure seen from the rotor axial direction inner side) which shows the structure of the protection member of 1st embodiment. It is a bottom view (figure seen from the rotor diameter direction inner side) showing composition of a protection member of a first embodiment. It is a right view (figure seen from the rotor rotation side) which shows the structure of the protection member of 1st embodiment. It is a top view (figure seen from the rotor diameter direction outside) for explaining an example of wearing of a protection member of a first embodiment. It is a front view (figure seen from the rotor axial direction inner side) for demonstrating the example of installation of the protection member of 1st embodiment. It is a perspective view for demonstrating the mounting example of the protection member of 1st embodiment. It is an expansion perspective view for explaining the wearing example of the protection member of a first embodiment. It is a front view (figure seen from the rotor axial direction inner side) which shows the structure of the protection member of 2nd embodiment.

  Hereinafter, an embodiment of the present invention will be described based on the drawings. In addition, each figure used for description is a conceptual diagram, and the shape of each part may not necessarily be exact. In the description, the axial direction of the rotor (disk rotor) R is referred to as "rotor axial direction", the radial direction of the rotor R is referred to as "rotor radial direction", and the circumferential direction of the rotor R is referred to as "rotor circumferential direction". . Also, the turning side (leading side) of the rotor R at the time of forward rotation of the rotor R is referred to as "rotor turning side", and the turning side (trailing side) of the rotor R at the time of forward rotation of the rotor R It is called "rotor turnout side".

First Embodiment
The disk brake device 1 of the first embodiment is a floating disk brake device, and as shown in FIGS. 1 to 4, the mount 2, the caliper 3, the slide pin 4, the pin boot 5, and a pair of pads 6 and a protection member 7. Note that, for the sake of explanation, in FIG. 1, the protection member 7 on the rotor rotating side is shown by a dotted line and is shown in a state where the protection member 7 is seen through. Further, in FIG. 4, only a part of the protection member 7 (a mounting part 71 described later) is shown, and the other parts are omitted.

  The mount 2 is a metal member (torque member) attached to a member on the vehicle body side. As shown in FIGS. 1 and 3, the mount 2 includes a pair of straddling portions 21 straddling the rotor R in the rotor axial direction, and a pair of outer side torque receiving members extending inward in the rotor radial direction from one end of each straddling portion 21. A bridge portion 23 for bridging between the end portion of the pair of outer side torque receiving portions 22 and a pair of inner side torque receiving portions 24 extending inward in the radial direction of the rotor from the other end of each crossing portion 21 (see FIG. 10) and a bridge portion 25 (see FIG. 10) that bridges between the tip end portions of the pair of inner side torque receiving portions 24.

  Each striding portion 21 is formed with a pin guide hole 21 a extending in the axial direction of the rotor. The slide pin 4 is inserted in the pin guide hole 21 a so as to be slidable in the axial direction of the rotor, and the caliper 3 is attached to the mount 2 so as to be movable relative to the mount 2 via the slide pin 4. The pin guide holes 21 a are respectively provided at a part on the rotor rotation inlet side and a part on the rotor rotation outlet side of the mount 2. That is, the mount 2 has two pin guide holes 21a.

  The caliper 3 is a metal member (for example, a member made of aluminum), and as shown in FIG. 1, has a caliper main body portion 31 straddling the rotor R in the rotor axial direction, and a pair of arm portions 32. The pair of arm portions 32 extend from the inner side portion 31 a of the caliper main portion 31 to the straddle portion 21 of the mount 2 so as to face in the rotor axial direction. Each arm portion 32 is formed with a fastening hole 32a which is a hole penetrating in the axial direction of the rotor and in which a screw thread is formed on the inner peripheral surface. Further, as shown in FIG. 2, a cylinder portion 31 b into which the piston 10 is inserted is formed at the inner side portion 31 a of the caliper main body portion 31. The outer side portion 31 c of the caliper body 31 is formed in a pair of claws.

  The slide pin 4 is a bolt-like metal member (so-called slide pin bolt) attached to each arm 32. The slide pin 4 is fixed to each of the arm portion 32 on the rotor rotation inlet side and the arm portion 32 on the rotor rotation outlet side.

  Specifically, as shown in FIG. 1 and FIG. 4, the slide pin 4 includes a head 41 disposed outside the caliper 3 and a shaft 42 extending from the head 41. The head portion 41 is formed such that a cross section (hereinafter referred to as an “axially orthogonal cross section”) cut by a plane orthogonal to the axial direction has a polygonal shape (here, a hexagonal shape). The shaft portion 42 is formed in a cylindrical shape as a whole, and has a screwing portion 421 screwed into the fastening hole 32a of the caliper 3 and a slide portion 422 formed to be insertable into the pin guide hole 21a. doing. The screwing portion 421 is a portion of the shaft portion 42 in which a screw thread corresponding to the fastening hole 32a is formed, and is a portion screwed with the fastening hole 32a. The slide portion 422 is a cylindrical portion of the shaft portion 42 in which no screw thread is formed, and is slidably inserted in the pin guide hole 21 a in the axial direction of the rotor. When a portion of the shaft portion 42 in which a screw thread is formed is located between the caliper 3 and the mount 2, the portion can be said to be a portion of the slide portion 422.

  The axial orthogonal cross-sectional area of the head 41 is larger than the axial orthogonal cross-sectional area of the screwing portion 421. The slide pin 4 and the caliper 3 are fastened (screw fixed) in a state where the head 41 presses the caliper 3 through the protective member 7. The caliper 3 is movable (slidable) relative to the mount 2 by the slide pin 4. As described above, in the disc brake device 1, the caliper 3 slides in the rotor axial direction with respect to the mount 2 in a state where the slide pin 4 fixed to the caliper 3 is inserted into the pin guide hole 21 a provided in the mount 2. It is supported and configured.

  The pin boot 5 is provided for each slide pin 4 and a portion (hereinafter referred to as “exposed portion”) of the slide pin 4 exposed between the straddle portion 21 of the mount 2 and the arm portion 32 of the caliper 3 It is a boot member for covering. The pin boot 5 is a bellows-like elastic member (e.g., a rubber member) fixed at one end to the bridge portion 21 and at the other end to the exposed portion of the slide pin 4 or the arm portion 32. One end of the pin boot 5 constitutes a bush, is assembled in an annular groove 21b provided in the pin guide hole 21a, and engages with the mount 2 in the axial direction of the pin guide hole 21a. Further, the other end of the pin boot 5 is assembled to an engaging portion 422 a provided at the slide portion 422, and is engaged with the slide portion 422 in the rotor axial direction. The engaging portion 422a of the first embodiment is an annular groove. The pin boot 5 is disposed to cover the exposed portion of the slide pin 4 and expands and contracts along with the slide of the slide pin 4.

  The pair of pads 6 is mounted on the mount 2 movably in the axial direction of the rotor. The pair of pads 6 is disposed on the inner side of the caliper 3 so as to face each other in the axial direction of the rotor via the rotor R. Each pad 6 has a friction material 61 that generates a braking force by being in sliding contact with the rotor R, and a back plate 62 that supports the back surface of the friction material 61. By increasing the hydraulic pressure in the cylinder portion 31 b, the piston 10 and the pad 6 on the inner side are pressed to the rotor R side and the cylinder portion 31 b is pressed to the side away from the rotor R. Then, the caliper 3 is moved relative to the mount 2 by the slide at the slide pin 4, the pad 6 on the outer side approaches the rotor R, and the pair of friction members 61 sandwich the rotor R. Thereby, a braking force is generated on the rotor R.

  As described above, the disc brake device 1 includes the mount 2 attached to a member on the vehicle body side, a pair of pads 6 movably attached to the mount 2, and a piston for pressing one of the pair of pads 6 toward the rotor R 10 and a caliper 3 movably attached to the mount 2 to press the other pad 6 toward the rotor R, and the slide pin 4 and the pin guide hole in the caliper 3 and the mount 2 21a is provided correspondingly, and the slide pin 4 is inserted into the pin guide hole 21a so that the mount 2 slidably supports the caliper 3 in the rotor axial direction.

  The protective member 7 is a metal member separately attached to each of the slide pin 4 on the rotating side of the rotor R and the slide pin 4 on the rotating side of the rotor R. That is, the disc brake device 1 is provided with two independent protection members 7. Each protection member 7 is equipped with the mounting part 71, the protection part 72, and the positioning part 73, as shown in FIG.1 and FIG.5-FIG. 5 to 8 show the protection member 7 on the rotor rotating side, and FIGS. 9 to 12 show an example of attachment of the protection member 7, and the shape of the caliper 3 is slightly different from that in FIGS. ing.

  The mounting portion 71 is a portion held by the head 41 and the caliper 3 (arm portion 32) in a state where the shaft portion 42 of the slide pin 4 is inserted. The mounting portion 71 is disposed (fixed) in a state of being pressed by the head 41 and the caliper 3 between the head 41 and the caliper 3 by screwing the slide pin 4 and the caliper 3. The mounting portion 71 is formed in an annular shape, and the shaft portion 42 is inserted through a through hole 71 a formed at the center. More specifically, the mounting portion 71 includes an annular substrate portion 711 forming the through hole 71 a and a plurality of protruding portions 712. Each protruding portion 712 slightly protrudes from the inner peripheral edge of the substrate portion 711 toward the caliper 3. The tip of the projecting portion 712 is formed in an edge shape. The plurality of projecting portions 712 are arranged at equal intervals on the inner peripheral edge of the substrate portion 711.

  The protective portion 72 is a portion extended from the mounting portion 71 and disposed on the outer peripheral side of the slide portion 422 located between the caliper 3 and the mount 2. In other words, the protection portion 72 is disposed on the outer peripheral side of the slide portion 422 so as to be able to cover a part of the outer peripheral surface of the slide portion 422 located between the caliper 3 and the mount 2 (also referred to as the outside of the pin guide hole 21a). Site. The protection portion 72 of the first embodiment is disposed on the outer peripheral side of the pin boot 5 so as to cover a part of the outer peripheral surface of the pin boot 5. As described above, the pin boot 5 is a member that covers the exposed portion of the slide portion 422, and is located on the outer peripheral side of the slide portion 422 located between the caliper 3 and the mount 2. That is, the protective portion 72 is disposed on the outer peripheral side of the slide portion 422 located between the caliper 3 and the mount 2 via the pin boot 5.

  Here, the shape of the protection part 72 of the first embodiment will be described in detail. The protective portion 72 includes a first plate-like portion 721 extending from the outer peripheral portion of the substrate portion 711 on the same plane as the substrate portion 711 and a second plate-like portion 721 extending outward from the first plate-like portion 721 in the rotor axial direction. And a plate-like portion 722. The second plate-like portion 722 is formed in accordance with the shape of the arm portion 32, and the plate-like member is used as the arm portion 32 (pin boot in order to follow the outer peripheral surface of the arm portion 32 (or the outer peripheral surface of the pin boot 5). 5) one or more curved portions 722a, 722b that are curved to the side. In other words, the second plate-like portion 722 includes curved portions 722 a and 722 b that bend the plate-like member so as to surround the pin boot 5.

  More specifically, the second plate-like portion 722 includes a first flat surface 722x, a second flat surface 722y, a third flat surface 722z, a curved portion 722a connecting the first flat surface 722x and the second flat surface 722y, and a second flat surface 722y. And a third flat surface 722z. The first flat surface 722 x and the second flat surface 722 y are located on the outer side in the rotor radial direction of the pin boot 5 and cover a portion on the outer side in the rotor radial direction of the pin boot 5. The third flat surface 722z of the protection member 7 on the rotor rotation inlet side is located on the rotor rotation inlet side of the pin boot 5 and covers the portion on the rotor rotation inlet side of the pin boot 5. Conversely, the third flat surface 722z of the protection member 7 on the rotor rotation side is located on the rotor rotation side of the pin boot 5 and covers the portion on the rotor rotation side of the pin boot 5.

  The first flat surface 722 x extends from the first plate-like portion 721 to the outer peripheral side of the inner end portion of the bridging portion 21. The second flat surface 722 y and the curved portions 722 a and 722 b extend from the outer peripheral side of the outer side end of the arm portion 32 to the outer peripheral side of the inner side end of the bridging portion 21. The third flat surface 722 z extends from the outer peripheral side of the outer end of the arm portion 32 to a position approaching (or in contact with) the inner end face of the bridging portion 21. The third plane 722z has a length in the rotor axial direction smaller than that of the other portion, and forms a step with the curved portion 722b. The axial length of the third flat surface 722 z is larger than the axial length of the pin boot 5.

  Thus, the second plate-like portion 722 is at least a portion of the pin boot 5 on the outer side in the rotor radial direction and a portion on the side far from the cylinder portion 31b in the rotor circumferential direction (a portion on the rotor rotation inlet side or rotor rotation Side part) is covered. More specifically, the second plate-like portion 722 of the first embodiment covers the entire rotor axial direction of the rotor radial direction outer part and the entire rotor axial direction of the part far from the cylinder portion 31b in the rotor circumferential direction. ing. It can be said that "the side far from the cylinder portion 31b" is "the side far from the central portion of the caliper 3 in the circumferential direction of the rotor".

  The positioning part 73 is a plate-like part which protrudes to the rotor axial direction outer side from the position which opposes the 1st plane 722x of the 2nd plate-like part 722 among the board | substrate parts 711. As shown in FIG. The positioning portion 73 is formed along the shape of the arm portion 32. The positioning portion 73 abuts (or approaches) the outer peripheral surface of the base end side (the caliper main body portion 31 side) of the arm portion 32. The positioning portion 73 engages the mounting portion 71 with the arm portion 32 in the rotational direction about the central axis of the slide pin 4 (shaft portion 42). The positioning portion 73 regulates the rotation of the mounting portion 71 with respect to the arm portion 32.

  The shapes of the two protective members 7 are symmetrical (see FIGS. 1, 9 and 10). That is, in the protection member (corresponding to the “first protection member”) 7 on the rotor rotation inlet side, the protection portions 72 are positioned on the rotor radial direction outer side and the rotor rotation inlet side, and the protection member on the rotor rotation outlet side In (7) (corresponding to 2 protective members), the protective portions 72 are located on the outer side in the rotor radial direction and on the rotor turnout side. The disc brake device 1 according to the first embodiment includes a pin boot 5 disposed between the caliper 3 and the mount 2 and covering a slide portion 422 located between the caliper 3 and the mount 2, and the protection portion 72 The pin boot 5 is disposed on the outer circumferential side of the pin boot 5 so as to cover a part of the outer circumferential surface of the pin boot 5.

  According to the first embodiment, since the separate and independent protection members 7 are provided for the two slide pins 4, there is no need to greatly extend the protection members 7 in the circumferential direction of the rotor. As a result, the protection member 7 can be miniaturized, and in turn, the disk brake device 1 can be miniaturized. Further, since the protective member 7 protects the pin boot 5 on the outer side in the rotor radial direction to which foreign matter easily enters and the side distant from the cylinder portion 31 b in the rotor circumferential direction, the pin boot 5 (between the caliper 3 and the mount 2) Foreign objects can be suppressed. This makes it possible to suppress the occurrence of a defect caused by the entry of foreign matter. As described above, according to the first embodiment, it is possible to suppress the entry of foreign matter between the caliper 3 and the mount 2 without increasing the size. That is, according to the first embodiment, it is possible to achieve both downsizing and suppression of the entry of foreign matter into between the caliper 3 and the mount 2.

  Further, since the protective member 7 has the positioning portion 73, positional deviation due to the rotation of the protective member 7 is suppressed. Thereby, the protective portion 72 is maintained at the target position, and the entry of foreign matter can be accurately suppressed. Further, since the mounting portion 71 has the projecting portion 712, when the slide pin 4 is screwed into the caliper 3 and the mounting portion 71 is held between the head portion 41 and the caliper 3, the projecting portion 712 becomes the caliper 3. The frictional force between the mounting portion 71 and the caliper 3 is increased. As a result, the rotation of the protective member 7 is suppressed, and the loosening of the screwed state between the slide pin 4 and the caliper 3 can be suppressed.

  Moreover, since the protection member 7 of 1st embodiment is comprised by the plate-shaped member, it is thin and it is easy to miniaturize, and it is advantageous also from a viewpoint of weight reduction. In addition, it is not necessary to align two positions at the same time, and the mounting operation of the protective member 7 is also facilitated. Further, since the protective member 7 is separated, no stress is generated between the protective members 7 and the durability is also excellent.

Second Embodiment
The disk brake device of the second embodiment differs from the first embodiment in the configuration of the mounting portion 71. Therefore, the differences will be described. In the description of the second embodiment, the description of the first embodiment and the drawings can be referred to. FIG. 13 shows the protection member 7 on the rotor side of the second embodiment.

  The mounting portion 71 of the second embodiment, as shown in FIG. 13, includes a substrate portion 711 and projecting portions 712 formed on both sides (both sides in the rotor axial direction) of the substrate portion 711. The plurality of protruding portions 712 formed on one side are portions protruding toward the caliper 3 from the outer side end surface (end surface on the caliper 3 side) of the substrate portion 711 and radially on the outer side end surface of the substrate portion 711 It is formed. The plurality of protruding portions 712 formed on the other side are portions protruding toward the head 41 from the inner end surface (end surface on the head 41 side) of the substrate portion 711, and on the inner end surface of the substrate portion 711 It is radially formed. Each projecting portion 712 has an end portion shaped like an edge (for example, a triangular apex). In addition, about one protrusion site | part 712, since it is the structure similar to the other protrusion site | part 712, illustration is abbreviate | omitted. The plurality of projecting portions 712 can be said to be portions that form a plurality of recesses (grooves) radially extending to the substrate portion 711.

  According to the second embodiment, as in the first embodiment, the frictional force between the first protruding portion 712 a and the caliper 3 is increased, so that the slack suppressing effect is exhibited. Furthermore, according to the second embodiment, the frictional force between the second protruding portion 712 b and the head portion 41 is also increased, so that a larger slack suppressing effect is exhibited.

(Others)
The present invention is not limited to the above embodiment. For example, the disc brake device is attached to the first protection member 7 attached to the slide pin 4 positioned on the rotor rotation inlet side, and the second protection member attached to the slide pin 4 positioned on the rotor rotation outlet side 7, and the shape of the said 1st protection member 7 and the shape of the 2nd protection member 7 may be the same. In this case, for example, instead of the positioning portion 73, the second protection portion 72 is formed in the mounting portion 71, and the tip end portion of the second protection portion 72 is formed in the portion of the caliper 3 corresponding to the second protection portion 72. You may form the recessed part to accommodate. The protection member 7 having the two protection portions 72 formed symmetrically is mountable on both the rotor rotation side and the rotor rotation side, and it is possible to share the protection member 7, that is, to reduce the number of parts. Become. In this case, the protection unit 72 also exhibits a positioning function. Also, the protection portion 72 may be curved as a whole, for example, a part of a cylinder. Moreover, it is preferable that the protection part 72 can protect at least 2 directions like the 2nd plate-like part 722, and when using a flat member, it is preferable to have a 1 or more (one or several) curved part.

  The other end of the pin boot 5 may be fixed to the arm 32. Moreover, the slide pin 4 may be comprised by several members, for example, as it describes in Unexamined-Japanese-Patent No. 2005-220942. The slide pin 4 may include, for example, a bolt member screwed to the caliper 3 and a slide member screwed to the tip of the bolt member. In this case, the portion of the bolt member to be screwed into the caliper 3 corresponds to the screwing portion 421, and the slide member corresponds to the slide portion 422. Even if it is such composition, the same effect as the above-mentioned embodiment is exhibited. Further, in this case, the engaging portion 422a may be a projecting portion that protrudes annularly from the outer peripheral surface of the slide member.

  Further, the protective member 7 may be attached to either the slide pin 4 positioned on the rotor rotation side or the slide pin 4 positioned on the rotor rotation side. For example, the protective member 7 may be installed only on the slide pin 4 on the rotor rotation side, which is relatively easy for foreign matter to enter. Further, the present invention is applicable even when there is no pin boot 5 between the caliper 3 and the mount 2 or when a member other than the pin boot 5 is disposed.

DESCRIPTION OF SYMBOLS 1 ... Disc brake apparatus, 2 ... Mount, 21a ... Pin guide hole, 3 ... Caliper, 4 ... Slide pin, 41 ... Head, 42 ... Shaft part, 421 ... Screwing site | part, 422 ... Sliding site | part, 7 ... Protective member , 71: mounting portion, 72: protective portion, 73: positioning portion.

Claims (4)

In a disk brake device, in which the caliper is slidably supported in the axial direction of the rotor with respect to the mount, with the slide pin fixed to the caliper being inserted into a pin guide hole provided in the mount.
The slide pin separately attached to each of the slide pin located on the rotation entry side of the rotor and the slide pin located on the rotation exit side of the rotor, or the slide pin located on the rotation entry side of the rotor A protective member attached to any one of the slide pins located on the rotating side of the rotor;
The slide pin has a head disposed outside the caliper, and a shaft extending from the head,
The shaft portion has a screwing portion to be screwed into the caliper, and a slide portion formed to be insertable into the pin guide hole,
The protective member extends from the mounting portion held by the head and the caliper in a state in which the shaft portion is inserted, and the slide portion positioned between the caliper and the mount. And a protective portion disposed on the outer peripheral side of the disc.   The disk brake device according to claim 1, wherein the protective member includes a positioning portion that engages the mounting portion in a rotational direction around the central axis of the shaft portion with respect to the caliper.   The disk brake device according to claim 1, wherein the mounting portion includes an annular substrate portion and a projecting portion projecting from the substrate portion toward the caliper. A first protection member which is the protection member attached to the slide pin positioned on the rotation inlet side of the rotor;
A second protection member, which is the protection member mounted on the slide pin positioned on the rotating side of the rotor;
Equipped with
The disk brake device according to any one of claims 1 to 3, wherein a shape of the first protective member and a shape of the second protective member are the same.

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