JP2002210639A - Machining method of braking surface of brake disc rotor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems wherein a unit in which a brake disc rotor is mounted on a hub shaft or a knuckle is in a special shape and large, and accordingly requires a special holder while the brake disc rotor is machined, and poses difficult alignment of a machining base with the center of rotation while the unit is mounted on an actual vehicle, to cause axial runout of the disc rotor. SOLUTION: A hub wheel 5 is assembled in a double-row rolling bearing 20 to form a hub unit 4. With the hub unit mounted on a vehicle body, each grinding wheel 18 is pressed against each braking surface 2 and 3 to provide machining, so that the brake disc rotor 1 is machined in an actual used state and that axial runout of the brake disc rotor 1 can be minimized without special setting of a machining base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machining method for machining a braking surface of a brake disk rotor on which wheels are mounted.

[0002]

2. Description of the Related Art In general, in a brake device for a vehicle, braking surfaces on both sides of a brake disk rotor on which wheels are mounted are provided.
The brake disc rotor (wheel) is braked by pressing the brake pad using hydraulic pressure. This operation is performed by the driver operating the brake pedal. Therefore, when the brake pad is pressed against the braking surface of the brake disk rotor, it is necessary to process (grind, cut) the braking surface so that the brake disk rotor does not swing with respect to the axis.

[0003] The applicant of the present invention has incorporated a hub wheel into a double row rolling bearing to form a hub unit for an axle, for example.
Attach the brake disc rotor to this hub unit,
We are working diligently to develop a technology that processes the braking surface of the brake disk rotor as an assembly with a knuckle (carrier) attached to the vehicle body and thereby improves the surface runout accuracy.

[0004]

However, the assembly in which the brake disk rotor is attached to the hub unit and the knuckle is attached becomes irregular and large. For this reason, a special holding device is required to hold the assembly.

Further, when the assembly is held by using this holding device, it is difficult to make the machining reference coincide with the rotation center of the brake disk rotor in a state where the assembly is installed in an actual vehicle. When the surface is processed, it is conceivable that a run-out may occur when the assembly is mounted on a vehicle and the brake disk rotor is rotated.

Accordingly, an object of the present invention is to provide a method of machining a braking surface in a brake disk rotor that can solve the above-mentioned problems.

[0007]

According to the present invention, there is provided a braking device which applies a braking force to a brake disk rotor by pressing a brake pad against braking surfaces on both sides of the brake disk rotor. When machining the braking surface of the brake disc rotor in a vehicle,
Using a processing device in which a processing tool is disposed at a position where a brake pad of the braking device is disposed, while rotating the brake disk rotor around an axis with the brake disk rotor attached to the axle bearing device, and mounting the processing tool on the brake disk rotor It is brought into contact with the board surface to form a braking surface.

[0008] The processing tool is a grindstone for grinding the disk surface of the brake disk rotor, or the processing tool is a cutting tool for cutting the disk surface of the brake disk rotor.

As described above, by forming the braking surface by rotating the brake disk rotor around the axis with the brake disk rotor attached to the bearing device, the brake disk rotor can be machined in an actual use state. Therefore, there is no need to specially set the processing standard, and the processing equipment required for this can be simplified.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on embodiments shown in the drawings. 1 to 3 relate to an embodiment of the present invention. FIG. 1 is a perspective view of a state in which a brake disk rotor is incorporated in a processing apparatus. FIG. FIG. 3 is a schematic sectional view showing the movement of the grindstone.

Here, the configuration of the processing apparatus 9 for performing the processing method according to this embodiment will be described. This processing device 9 has a configuration using an existing brake caliper (brake device). As shown in FIGS. 1 and 2, the brake disk rotor 1 is provided with a hub unit (axle bearing device) 4 described later. It is fitted to the hub wheel 5 and is formed in an annular shape from a mounting plate 6 on the vehicle outer side and a brake plate 8 integrally formed with the mounting plate 6 via a stepped portion 7.

As shown in FIG.
A caliper body 10 disposed so as to straddle a part of the annular brake disc rotor 1, and an axis C of a rotation shaft (hub shaft) 11 of the hub wheel 5.
There is provided a support device (not shown) for supporting the reciprocal movement along the direction. The caliper body 10 is fixed to the knuckle 19 by bolts via the support device.

On the vehicle outer side of the caliper body 10, there is formed a pressing portion 12 bent (toward the axis C) along the braking surface 2 of the brake disk rotor 1 on the vehicle outer side. On the vehicle inner side of 10, a cylinder chamber 14 is formed for slidably mounting the piston member 13 on the other braking surface 3 along the axis C direction.
The caliper body 10 has a supply hole 16 for supplying the operating pressure oil 15 to the cylinder chamber 14.

The pressing portion 12, the piston member 13
A grindstone 18 as an example of a processing tool is detachably attached to the inner surface (the surface on the side facing both sides).

Reference numeral 17 in the drawing denotes a seal ring buried in the inner peripheral surface of the cylinder chamber 14.

The hub unit 4 has a plurality of hub wheels 5 to which wheels are mounted, and a double row for fixing the hub wheels 5 to the vehicle body via the knuckles 19 and rotatably supporting the hub wheels 5 around an axis C. The double-row rolling bearing 20 includes an outer ring 22 having a flange 21 to which the knuckle 19 is fixed, formed on an outer peripheral surface.

Next, a method of processing the braking surfaces 2 and 3 of the brake disk rotor 1 using the processing device 9 will be described with reference to FIG.
This will be described with reference to a schematic diagram of FIG.

First, the hub wheel 5 is assembled to the double row rolling bearing 20 to form the hub unit 4. The brake disk rotor 1 is fitted to the hub wheel 5, and the outer ring 22 of the double row rolling bearing 20 is attached to the knuckle 19. Thereafter, the caliper body 10 of the processing device 9 is mounted on the knuckle 19 using the bolt holes for mounting the brake caliper so that the brake disc 8 of the brake disc rotor 1 is positioned between the two grindstones 18. At this time, a state where a gap is held between each of the braking surfaces 2 and 3 and the grindstone 18, that is, the caliper body 10
Is at the position shown by the solid line in the figure. Then, in this state, the hub wheel 5 is rotated around the axis C.

In the processing apparatus 9, when the operating pressure oil 15 is supplied to the cylinder chamber 14, the piston member 13 is pressed toward the vehicle outer side by the hydraulic pressure, and the operating pressure oil 15 is further supplied to the cylinder chamber 14. The cylinder chamber 14 expands and is guided by the support device by the reaction force of the operating pressure oil 15, and the caliper body 10 moves to the vehicle inner side as shown by the imaginary line in the figure, and each grinding wheel 18 It is pressed against the braking surfaces 2 and 3 with a predetermined pressing force. Since the brake disc rotor 1 is rotating around the axis C, the braking surfaces 2 and 3 are ground by the grinding wheels 18.

When the machining of both braking surfaces 2 and 3 is completed, the grindstone 18 is removed and replaced with a brake pad, so that the machining device 9 is used as a braking device.

As described above, according to the working method in the embodiment of the present invention, the hub wheel 5 is mounted on the double row rolling bearing 20.
The hub unit 4 is assembled into the hub unit 4, and the grinding wheel 18 is pressed against each of the braking surfaces 2, 3 with the hub unit 4 and the brake disk rotor 1 mounted on the knuckle 19, so that the brake disk rotor 1 is actually used. Processing can be performed in a use state, and there is no need to specially set a processing reference unlike the conventional technique.

Further, by removing each whetstone 18 in the processing device 9 and replacing it with a brake pad, the processing device 9 can be used as a braking device for braking the rotation of the brake disk rotor 1. Improve the character.

The present invention is not limited to the above embodiment, and various applications and modifications are possible.

(1) For example, in the above-described embodiment, a cylinder chamber 14 is formed in the other side of the caliper body 10 so that the piston member 13 is slidably mounted on the braking surface 3. The processing device 9 configured to move the caliper main body 10 by supplying 15 and press each grindstone 18 against each braking surface 2, 3 was used, but the present invention is not limited to this. For example, as shown in FIG. 4, cylinder chambers 14 for slidably mounting the piston members 13 are formed on both sides of the caliper body 10, and the operating oil 15 is supplied to each of the cylinder chambers 14. The brake disk rotor 1 is moved by using a processing device 9 configured to move each of the grindstones 18 against each of the braking surfaces 2 and 3.
Each of the braking surfaces 2 and 3 can be machined.

(2) In each of the above embodiments, the example in which the grindstone 18 is used as the processing tool has been described, but the present invention is not limited to this. For example, as shown in FIG. 5, a cutting tip (cutting tool) 20 for cutting may be used as a working tool. In this case, the arm members 21 that can approach and separate from each other along the axis C depending on the amount of the operating pressure oil 15 are attached to the piston member 13 (or the pressing portion 12) of the processing device 9, and the arm members 21 are separately provided. The cutting tip 20 is configured to be movable along the radial direction of the brake disk rotor 1 by being attached to the cylinder device.

According to this structure, the brake disc rotor 1 is rotated around the axis C while the brake disc rotor 1 is mounted on the hub wheel 5, and the separation width of the cutting tip 20 is adjusted to the braking surface 2 of the brake disc rotor 1. , 3 are adjusted to a cutting distance and the cylinder device is driven to move the cutting tip 20 in the direction of the axis C, thereby cutting the braking surfaces 2, 3.

(3) As yet another embodiment, as shown by the phantom line in FIG.
It is installed near the upper cutting tip 20. According to the processing method of the braking surfaces 2 and 3 using the processing device 9 having this configuration,
Even if cutting chips are generated when cutting the braking surfaces 2 and 3 with the cutting tip 20, the chips are attracted by the magnetic force of the electromagnet 25, so that the cutting chips can be prevented from scattering to the hub unit 4 side. Thereby, it is possible to prevent the hub unit 4 from being damaged by the cutting chips. When the cutting is completed, the electromagnet 25 is turned off, and the cutting chips adsorbed by the electromagnet 25 are discharged to a predetermined place.

In this embodiment, the electromagnet 25
Is not particularly limited as long as it can absorb cutting chips.

(4) In each of the above-described embodiments, the power for driving each of the grindstones 18 and the cutting tips 20 (working tools) is not limited to hydraulic pressure, but uses electric power, pneumatic pressure, or other power. May be.

(5) Further, in each of the above embodiments, the processing apparatus 9 is configured by using the existing brake caliper and mounting the processing tool instead of the brake pad. However, the brake disk is provided with the processing tool as described above. A machining device 9 used only for machining the rotor 1 may be provided as a separate device from the brake caliper, and after machining the brake disk rotor 1, the machining device 9 may be removed and replaced with a brake caliper.

Then, another embodiment (1) described above.
In (2), (3), (4), and (5), the brake disk rotor 1 can be machined in an actual use state, and it is not necessary to set a machining standard specially as in the related art. Conventional processing equipment can be simplified.

In addition, by machining the brake disc rotor 1 in an actual use state, the run-out of the brake disc rotor 1 when the brake is operated in the vehicle can be minimized without specially setting a machining reference. Can be suppressed.

[0033]

As is apparent from the above description, the present invention comprises a braking device which applies a braking force to the brake disk rotor by pressing the brake pads against the braking surfaces on both sides of the brake disk rotor. The processing of the braking surface of the brake disk rotor in the vehicle is performed by rotating the brake disk rotor around the shaft center with the brake disk rotor attached to the axle bearing device using a processing device in which a processing tool is arranged at the position where the brake pad of the braking device is arranged. At the same time, since the braking surface is formed by bringing the processing tool into contact with the surface of the brake disk rotor, the brake disk rotor can be processed in an actual use state. There is no need to set, and the processing equipment required for this can be simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a brake disk rotor is incorporated in a processing apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a processing apparatus and a hub unit for performing a method of processing a brake disk rotor.

FIG. 3 is a schematic sectional view showing the movement of the grindstone.

FIG. 4 is a schematic cross-sectional view showing an operation of a grindstone for performing a processing method according to another embodiment.

FIG. 5 is a schematic cross-sectional view showing a cutting tip operation for performing a processing method according to still another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brake disk rotor 2 Braking surface 4 Hub unit 5 Hub wheel 8 Braking board 9 Processing device 10 Caliper body 13 Piston member 14 Cylinder chamber 15 Pressure oil for operation 18 Grinding stone

Claims (3)

[Claims] 1. A method of processing a braking surface of a brake disk rotor in a vehicle including a braking device configured to apply a braking force to a brake disk rotor by pressing a brake pad against braking surfaces on both sides of the brake disk rotor. Using a processing device in which a processing tool is disposed at a position where a brake pad of the braking device is disposed, rotating the brake disk rotor around an axis with the brake disk rotor attached to the axle bearing device, and braking the processing tool A method of processing a braking surface of a brake disk rotor, wherein the braking surface is brought into contact with the surface of the disk rotor. 2. The method for processing a braking surface in a brake disk rotor according to claim 1, wherein the processing tool is a grindstone for grinding a disk surface of the brake disk rotor. 3. The method for processing a braking surface of a brake disk rotor according to claim 1, wherein the processing tool is a cutting tool for cutting a board surface of the brake disk rotor.