JPS5939112Y2 - Brake disc mounting structure on vehicle wheels - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure that improves the attachment of a brake disc to a wheel used in a vehicle such as a motorcycle.

More specifically, in a vehicle wheel in which the rim and the hub are connected by a spoke plate, the plate and the brake disc are commonly connected by bolts and nuts having a rotation prevention structure on the inner and outer surfaces of the hub attachment part. The present invention relates to a brake disc mounting structure that reduces the number of parts required for mounting a brake disc and improves the workability of mounting and dismounting the brake disc.

The present applicant has provided a wheel used for a wheel such as a motorcycle in which a rim and a hub are connected by a spoke plate.

This allows the number of parts to be minimized compared to spoked wheels, improves wheel assembly workability, is favorable for mass production, reduces costs, and also allows for tubeless tires. It is easy to install, and is lighter and cheaper than cast wheels.

By the way, in such wheels, the tip of the plate is attached to the rim side with bolts or rivets, and the base of the plate is attached to the hub with bolts, and the brake disc is attached to the hub as follows. .

That is, the plate base is placed against the axial end surface of the hub and fastened with bolts, and a separate mounting hole is provided between the plate mounting bolt holes, and a brake disc is placed on the outer surface of the plate base and secured using separate bolts. It is attached to the hub.

This brake disc mounting structure requires a large number of parts because the brake disc is mounted to the plate with separate bolts, and secondly, the brake disc mounting hole is provided in the hub separately from the plate mounting hole. The number of man-hours required for hole machining increases, and the strength of the hub may be reduced due to the increase in the number of holes.Furthermore, the number of bolt connections increases, reducing assembly workability, and is therefore not optimal for mass production.

Therefore, it is possible to focus on the fact that the brake disc and the plate base are overlapped and to connect them with a common bolt, but according to this method, when replacing the brake disc as necessary, the brake disc can be replaced by loosening the bolt. When removed, the connections between the plates loosen or come off at the same time, requiring the plates to be reassembled and tightened.
Disc replacement becomes troublesome and complicated.

The present inventor devised the present invention in view of the following problems in the brake disc mounting structure of this type of wheel, and to solve these problems.

The purpose of the present invention is to attach the spoke plate and the brake disc to the above-mentioned wheel using bolts and nuts having a rotation prevention structure so as to sandwich the inner and outer surfaces of the mounting part of the hub, and to attach the fluke disc. To provide a brake disc mounting structure for a vehicle wheel that reduces the number of parts, improves assembly efficiency, and improves workability for mounting and dismounting during maintenance.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

This reveals further objects and advantages of the present invention.

FIG. 1 is a longitudinal sectional view of the wheel, showing only the radial half.

Reference numeral 1 denotes a rim which is formed into an endless ring shape from a light alloy or the like, has tabs 1a and 1a on both outer sides, and a bead receiving portion 1b extending laterally on the inner diameter side of the rim.

1b is integrally molded with a drop part 1C connecting the two in the center, and a mounting protrusion 1d is provided in the center of the inner diameter of the drop part to protrude in the inner diameter direction. It is placed around the circumference.

Lay the tips 2a, 3a of the spoke plates 2, 3 on both sides of the mounting projection 1d of the rim 1 in the axial direction with the washers 4, 4 interposed, pass the bolt 5 through the plates 2, 3 and the projection 1d, and tighten the nut. Tightening is done by screwing through 6.

Alternatively, the three parts may be joined using rivets.

7 is a hub, and the hub 7 is formed by casting or the like, and has an axle insertion hole 7a formed in the center thereof with bearings 8, 8 interposed therebetween.

As is clear from FIG. 2, the outer periphery of the hub 7 is provided with radially protruding mounting portions 9, 10, and the like.
..., 10... are located at two locations 9, 1 on both axial ends of the hub 7.
0 are provided, and a plurality of 9° and 10 are provided radially on each side, five in the illustrated example.

The mounting portions 9..., 10... are provided facing each other at the same position in the circumferential direction, and each has a wall thickness necessary for strength in the axial direction.

Step portions 9a and 10a recessed toward the outer surface are formed on the inner surfaces of the mounting portions 9 and 10 in the opposing axial direction.
, 10c are formed, and the opening surfaces of the mounting holes 9d, 10d on the outer surfaces 9c, 10c are recessed one step toward the inner surface.
Step portions 9f and 10f are formed on the inner diameter side of the outer end surfaces of the grooves c and 10c.

The base portions 2b, 3b of the left and right plates 2, 3 mentioned above are attached to the inner step portions 9a of the mounting portions 9, 10 of the hub 7.

10a through washers 11.11, and insert bolts 12, 12 into the mounting holes 9d from each outer surface of the mounting portion 9.10.
.

10d and the washers 11, 11 . Through the bases 2b, 3b of play 1-2.3, step 9a.

Screw nuts 13 and 13 from the inner side of 10a, and
12° Screw through the head 12a of 12, and attach the mounting parts 9 and 10.
Plate bases 2b and 3b are bonded to each opposing inner surface of the plate bases 2b and 3b.

The nut 13 has substantially the same shape as the stepped portions 9a, 10a, and the lower surface 13a of the nut 13 contacts the stepped portions 9a, 10a to prevent rotation.

The bolt 12 has a head 12a at the middle part, a male threaded part 12b at one end, which is screwed into the nut 13, and an extending part at the tip of the head 12a. A male screw portion 12c is also provided at the top, and a flange portion 12d is integrally provided below the head 12a.

The head 12a of the bolt 12 fits into the recess 9 on the outer surface of the mounting portions 9 and 10.
Facing e and 10e, the flange portion 12d of the two heads 12a is provided with a top portion 12e on a part of the outer periphery, and a pin 14 is passed through the mounting portion side of the top portion 12e and engaged with the hub side to prevent rotation. Line fu.

On the other hand, the threaded portion 12c at one end of the bolt 12 is attached to the outer surface 9 of the mounting portion.
c, protruding outward from 10c, brake disc 15, 1
5 on the outer surfaces 9c and 10c of the mounting parts 9 and 10, the inner diameter part 15a is locked to the stepped part 9f, the threaded part 12c is passed through the mounting hole 15b of the disk 15, and the nut 1 is inserted from the outside.
Tighten with 6 screws.

Thus, the disk 15 is screwed together to the mounting bolts 12 of the plates 2 and 3.

Next, to explain its function and effect, the plates 2゜3 are connected by bolts 12 on the hub 7 side, and the bolts 12 are prevented from rotating by engagement with the pin 14 and the top 12e of the head flange 12d. The nut 13 is prevented from rotating as described above,
Therefore, when the plates 2 and 3 are attached to the hub, they are reliably connected and held by the fasteners to prevent rotation.

The disk 15 is connected to the bolt head 12c by the nut 16 using the same bolt 12 without any rotation of the bolt 12.

Therefore, the disk 15 is connected to the plate 2.3 separately using a common bolt, and is removed when assembled or replaced due to wear, etc.)2. 3. Loosen the nut 16 without interfering with the disc 15.
can be removed, the disc replaced, and reassembled.

By doing this, firstly, the number of bolts can be halved since the plate and disc can be jointed together, the number of parts is reduced, and the number of tightening points is also reduced, greatly improving the ease of assembly and assembly. This is convenient for mass production.

Next, the number of mounting holes to be machined on the hub is reduced by half, so the number of holes is reduced as much as possible, making the hub manufacturing and processing easier, and since the number of holes is reduced, it is also advantageous for improving the strength of the hub.

Further, when replacing the disk, the disk can be attached and detached using a common bolt without involving the plate, which contributes to improved maintenance.

In this embodiment, the disks are provided on the left and right sides of the hub, but it goes without saying that they may be provided on one side.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the wheel, Figure 2 is a sectional view taken along line 2-2 in Figure 1, Figure 3 is a side view of the bolt, and Figure 4 shows an embodiment of the present invention. is an end sectional view of the same main part. In the drawing, 1 is the rim, 2 and 3 are spoke plates, 7 is the hub, 9 and 10 are the mounting parts, 12, 13, and 16 are nuts, 1
2e, 14 is a rotation stopper, and 15 is a brake disc.

Claims (1)

[Scope of utility model registration request] In a vehicle wheel in which a rim and a hub are connected by a spoke plate, a structure is provided on the axial inner surface of the spoke plate recesses provided at both axial ends on the outer periphery of the hub to prevent rotation of the base of the spoke plate. At the same time, a part of the screw means extends to the outer surface of the mounting portion in the axial direction, so that the play disks disposed on the outer surface of the hub are commonly and independently connected by the screw means. Brake disc mounting structure for vehicle wheels.