JP7193502B2 - Wheels for floating type brake discs and saddle type vehicles - Google Patents

Description

The present invention relates to a floating type brake disc having an annular rotor and a hub arranged inside the rotor, and the floating type brake disc, which is mainly used in a disc brake device for a saddle type vehicle such as a motorcycle. The present invention relates to a wheel for a saddle-ride type vehicle.

Conventionally, this type of floating type brake disc is known, for example, from Japanese Unexamined Patent Application Publication No. 2002-200011. In this device, a plurality of tongue-like protruding pieces extending radially inward are formed on the inner peripheral edge of the rotor at predetermined intervals in the circumferential direction, and the outer peripheral edge of the hub is provided corresponding to each of the protruding pieces. , a receiving recess that is recessed radially inward to receive the projecting piece is formed, and a retaining means is provided to prevent the projecting piece from slipping out of the receiving recess in the axial direction. In this device, the receiving recess is formed so as to penetrate from one axial surface of the hub to the other axial surface, and the retaining means is a connecting pin having a flange formed at one end of a cylindrical body. consists of By inserting the connecting pin into a pin hole formed in the projecting piece and crimping the other end of the connecting pin, the projecting piece is retained in one axial direction and the other axial direction.

By the way, during braking, the rotor heats up to a high temperature due to sliding contact with the brake pad. For this reason, when using an aluminum connecting pin, an alumite film is formed on the connecting pin in order to prevent discoloration due to heat transfer from the rotor. However, if the connecting pin on which the alumite film is formed is plastically deformed by caulking or the like, there arises a problem that the alumite film formed is cracked or peeled off.

In view of this, for example, JP-A-2003-100000 discloses a technique in which the connecting pin is not subjected to plastic deformation processing, and protrusions are retained in one axial direction and the other in the axial direction. In this device, the retaining means consists of two pieces which are arranged so as to sandwich a connecting pin having a flange portion formed at one end of the body portion, a pin hole formed in the protruding piece and a receiving recess formed in the hub from both sides in the axial direction. and a retaining ring engageable with a groove formed in the other end of the body of the connecting pin. By inserting the connecting pin through the two washers and the pin hole and engaging the retaining ring with the groove of the connecting pin, the projecting piece is prevented from slipping out of the receiving recess in the axial direction. However, since the connecting pin protrudes from the hub in the axial direction, the retainer (connecting pin and retaining ring) may interfere with the caliper during braking.

Japanese Patent No. 5783856 Japanese Patent No. 5803739

In view of the above points, the present invention provides a floating type brake disc and the floating type brake disc in which the retaining means is not subjected to plastic deformation processing and the retaining means can be prevented from interfering with the caliper during braking. It is an object of the present invention to provide a wheel for a saddle-ride type vehicle.

In order to solve the above problems, a floating type brake disc according to the present invention, which has an annular rotor and a hub arranged inside the rotor, has tongue-like portions extending radially inward on the inner peripheral edge of the rotor. A plurality of projecting pieces are formed at predetermined intervals in the circumferential direction, and receiving recesses are formed in the outer peripheral edge of the hub so as to correspond to the projecting pieces, respectively, and are recessed radially inward to receive the projecting pieces. A retaining means is provided to prevent the projecting piece from slipping out of the receiving recess in the axial direction. The means includes a retainer plate facing one axial surface of the projecting piece, and a retaining ring that engages with a groove formed in the inner wall surface of one axial end of the receiving recess to retain the retainer plate in one axial direction. It is characterized by being composed of

According to the present invention, the retainer means is engaged with the retainer plate facing the surface facing one axial direction of the projecting piece and the groove formed in the inner wall surface of one end in the axial direction of the receiving recess. Since it is configured with a retaining ring that prevents slippage in one direction, plastic deformation processing of the slippage preventing means as in the above-described conventional example is not required. Further, the retaining ring is engaged with a groove formed in the inner wall surface of one axial end of the receiving recess, so that the retainer does not protrude in the axial direction. Therefore, it is possible to prevent the retainer from interfering with the caliper during braking. In addition, since the other side of the receiving recess in the axial direction is closed by the wall integral with the hub (that is, does not penetrate the hub in the plate thickness direction), the strength (rigidity) of the hub can be increased. As a result, beams for connecting portions of the hub where respective receiving recesses are formed become unnecessary, and the weight of the entire floating type brake disc can be reduced. In addition, since no connecting pin is required, the number of parts can be reduced.

Further, in the present invention, it is preferable that a plate member for receiving the projecting piece is attached to the receiving recess in a shape along the inner wall surface of the receiving recess. According to this, the protruding pieces of the rotor do not come into direct contact with the receiving recesses of the hub during braking, and wear of the hub can be reduced.

Further, according to the present invention, it is preferable that biasing means having an axial biasing force is interposed between the projecting piece and the pressing plate or between the pressing plate and the retaining ring. According to this, each projecting piece can be elastically locked in the axial direction, and rattling at the time of braking can be suppressed.

Further, in the wheel for a saddle-riding type vehicle comprising a wheel and a floating type brake disc mounted on the wheel, the floating type brake disc of the present invention is used as the floating type brake disc. The brake disc is mounted on the wheel with one of the axial directions facing the wheel. According to this, the other portion in the axial direction of the receiving recess closed by the wall integral with the hub faces outward, so that the receiving recess does not appear on the outside, and the appearance is improved.

1 is a side view of a front wheel of a straddle-type vehicle equipped with a floating brake disc according to an embodiment of the present invention; FIG. 1 is a side view of a floating type brake disc according to an embodiment of the present invention, viewed from one axial direction; FIG. 1 is an exploded perspective view of essential parts of a floating type brake disc according to an embodiment of the present invention; FIG. The enlarged view cut|disconnected by the IV-IV line of FIG.

Referring to FIG. 1, FW is the front wheel of a saddle type vehicle such as a motorcycle. The front wheel FW has a wheel We rotatably supported via a bearing (not shown) on an axle Fs suspended from a front fork Ff, and a tire Tr mounted on the outer peripheral portion of the wheel We. In FIG. 1, Cp is a caliper as a component of the brake device. A brake disc BD according to an embodiment of the present invention is attached to a predetermined position on one side of the wheel We in the axial direction with a fixing bolt Vt. As the wheel We, the brake device, and the fixing bolt Vt, well-known ones can be used, so further explanation will be omitted.

Also referring to FIG. 2 , the brake disc BD includes an annular rotor 1 and a hub 2 arranged inside the rotor 1 . The rotor 1 is made of, for example, a stainless steel plate and has an annular shape. Referring also to FIG. 3, on the inner peripheral edge of the rotor 1, a plurality of substantially rectangular tongue-like protruding pieces 11 extending radially inward are formed at predetermined intervals in the circumferential direction. Further, the rotor 1 is provided with a plurality of circular through holes 12 penetrating in the plate thickness direction for weight reduction and the like.

The hub 2 disposed inside the rotor 1 is made of, for example, an aluminum alloy. The hub 2 has a central shaft hole 21 and a plurality of large and small through holes 22 penetrating in the plate thickness direction for weight reduction. are formed respectively. Then, it is attached to the wheel We by inserting fixing bolts Vt into attachment holes 23 formed around the shaft hole 21 .

Referring also to FIG. 4 , receiving recesses 24 are formed on the outer periphery of the hub 2 so as to correspond to the projecting pieces 11 and recessed radially inward to receive the projecting pieces 11 . In addition, the brake disc BD of this embodiment is provided with retaining means 3 for preventing the projecting piece 11 from slipping out of the receiving recess 24 in the axial direction.

Here, the receiving recess 24 has receiving surfaces substantially parallel to both radial side surfaces of the projecting piece 11 , and the width between the receiving surfaces is slightly larger than the circumferential width of the projecting piece 11 . ing. Further, the receiving recess 24 is provided so that only one axial direction is open, and the other axial direction is closed by a wall 25 integral with the hub 2 . Further, one end portion 24 a in the axial direction of the receiving recess 24 is formed in a substantially circular shape that is larger than the other portion of the receiving recess 24 . A groove 26 is formed in the inner wall surface of the end portion 24a along its circumferential direction.

The retaining means 3 is provided so as to face one axial surface of the protruding piece 11 and is made of, for example, an aluminum alloy. It is configured with a retaining ring 32 that prevents it from coming off in one direction. Since a known C-shaped snap ring can be used as the snap ring 32, detailed description thereof will be omitted. A plate member 4 having a shape (in this embodiment, a U-shape) along the inner wall surface of the receiving recess 24 is inserted into the gap between the projecting piece 11 and the receiving recess 24 . A coned disc spring 5 is interposed between the projecting piece 11 and the pressing plate 31 as a biasing means. In FIG. 2, the lowermost part shows the state in which the pressing plate 31, retaining ring 32, plate member 4 and disc spring 5 are not attached. The procedure for connecting the rotor 1 and the hub 2 will be specifically described below.

First, the plate member 4 is attached to each of the receiving recesses 24 of the hub 2 while the hub 2 is placed so that one of the axial directions faces upward. Next, the rotor 1 is placed outside the hub 2 so that the protrusions 11 of the rotor 1 are received in the receiving recesses 24 of the hub 2 (inside the plate member 4). After that, the disc spring 5 is placed on the protruding piece 11 and the pressing plate 31 is placed on the disc spring 5 . Finally, from above the pressing plate 31, the retaining ring 32 is engaged with the groove 26 formed in the inner wall surface of the one end 24a of the receiving recess 24 in the axial direction. As a result, the projecting piece 11 is axially retained in the receiving recess 24, and the rotor 1 and the hub 2 are connected.

According to this embodiment, as described above, the retaining means 3 is composed of the holding plate 31 facing one axial surface of the projecting piece 11 and the retaining ring 32 for retaining the holding plate 31 on one axial side. With this configuration, the plastic deformation processing of the retaining means as in the conventional example is not required. In addition, since the retaining ring 32 is engaged with the groove 26 formed in the inner wall surface of the one axial end 24a of the receiving recess 24, the retaining means 3 does not protrude in the axial direction. 3 can be prevented from interfering with the caliper Cp. Further, since the other side of the receiving recess 24 in the axial direction is closed by the wall 25 integral with the hub 2 (that is, does not penetrate the hub 2 in the plate thickness direction), the strength (rigidity) of the hub 2 can be increased. can. As a result, beams for connecting the portions of the hub 2 where the receiving recesses 24 are formed become unnecessary, and the weight of the entire brake disc BD can be reduced. In addition, a connecting pin becomes unnecessary, and the number of parts can be reduced.

Further, according to the present embodiment, the plate member 4 for receiving the projecting piece 11 is attached to the receiving recessed portion 24 in a shape along the inner wall surface of the receiving recessed portion 24, so that the projecting piece 11 does not enter the receiving recessed portion 24 during braking. Since there is no direct contact, wear of the hub 2 can be reduced.

Further, according to this embodiment, by providing the disc spring 5 between the projecting piece 11 and the pressing plate 31, each projecting piece 11 can be elastically locked in the axial direction. rattling can be suppressed. In the above embodiment, the disc spring 5 is interposed between the projecting piece 11 and the pressing plate 31. However, the disc spring 5 is interposed between the pressing plate 11 and the retaining ring 32. It may be turned upside down and interposed. Also in this case, each projecting piece 11 can be elastically locked in the axial direction.

Further, referring to FIG. 1, when the brake disc BD of the present embodiment is mounted on the wheel We of the front wheel FW for a saddle type vehicle, one side of the brake disc BD in the axial direction faces the wheel We. It is preferable that the wheel We is mounted at . According to this, the other portion in the axial direction of the receiving recess 24 closed by the wall 25 integral with the hub 2 faces outward, so that the receiving recess 24 does not appear on the outside, and the appearance is improved. The wheel shown in FIG. 1 is the front wheel FW for a saddle-ride type vehicle. It is preferable to wear it in a facing state.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above. For example, in the above embodiment, the plate member 4 is U-shaped, but the plate member 4 may be U-shaped. Further, in the above-described embodiment, the plate member 4 and the disc spring 5 are provided as an example, but the plate member 4 and the disc spring 5 may be omitted.

BD... Floating type brake disc FW... Front wheel of motorcycle (wheel for saddle type vehicle) We... Wheel 1... Rotor 11... Protruding piece 2... Hub 24... Receiving recess 24a... Receiving recess One end in the axial direction 25 Wall 26 Groove 3 Retaining means 31 Holding plate 32 Retaining ring 4 Plate member 5 Belleville spring (biasing means).

Claims (4)

A floating brake disc comprising an annular rotor and a hub arranged inside the rotor,
A plurality of tongue-like protrusions extending radially inward are formed on the inner peripheral edge of the rotor at predetermined intervals in the circumferential direction, and radially inner protrusions are formed on the outer peripheral edge of the hub so as to correspond to the respective protrusions. A receiving recess for receiving the projecting piece is formed by recessing in one direction, and is provided with retaining means for preventing the projecting piece from slipping out of the receiving recess in the axial direction,
the receiving recess is open only in one axial direction and closed in the other axial direction with a wall integral with the hub;
The retaining means engages the holding plate facing the one axial surface of the protruding piece and a groove formed in the inner wall surface of one axial end of the receiving recess to retain the holding plate in one axial direction. A floating type brake disc comprising a retaining ring. 2. The floating type brake disc according to claim 1, wherein a plate member for receiving said projecting piece is mounted in said receiving recess in a shape along the inner wall surface of said receiving recess. 3. A biasing means having an axial biasing force is interposed between said projecting piece and said pressing plate or between said pressing plate and said snap ring. Floating brake disc. A wheel for a saddle type vehicle comprising a wheel and a floating type brake disc mounted on the wheel,
The floating type brake disc according to any one of claims 1 to 3 is used as the floating type brake disc, and the floating type brake disc is mounted on the wheel with one of the axial directions facing the wheel side. A wheel for a saddle-ride type vehicle characterized by:

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