JP3279723B2 - Brake disk mounting condition inspection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake disk mounting state inspection apparatus for inspecting whether or not a brake disk is fixed vertically to an axle.

[0002]

2. Description of the Related Art If the brake disc of a disc brake device is not fixed perpendicularly to the axle correctly, the rotating surface of the brake disc will be blurred, and abnormal noise will be generated when the disc is held between brake calipers. Occurs.

Conventionally, as an apparatus for inspecting the mounting state of such a brake disc, a dial gauge is fixed using a bolt hole after a brake caliper is removed from a knuckle, or the dial gauge is fixed to a flat surface of the knuckle by a magnet. One that is fixed and the detector is brought into contact with the surface of the brake disk is used.

[0004]

However, since the dial gauge has a relatively large size, it is difficult to mount the mounting state inspection device in a narrow space on the back surface side of the brake disk on which the suspension arm is provided. is there. Therefore, it is necessary to remove the tire and mount the mounting state inspection device in the space on the front surface side of the brake disk, and there is a problem that the operation is troublesome. Moreover, in the case of mounting the mounting state inspection device using the bolt hole for mounting the brake caliper, it takes time and effort to remove the brake caliper, and in the case of mounting the mounting state inspection device using a magnet, Accurate measurement is difficult because the mounting position is easily shifted.

The present invention has been made in view of the above circumstances, and has as its object to simply and accurately detect the mounting state of a brake disc.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a brake disk mounting state inspection apparatus according to the present invention is provided.
Fixing means detachably fixed to a bolt or nut fastened to a non-rotating portion rotatably supporting the brake disc; a brake disc contact member made of an elastic body capable of abutting against a side surface of the brake disc; Connecting means for supporting the position of the brake disk contact member so as to be adjustable, a strain gauge provided on the flexible portion of the brake disk contact member, and a mounting state determination for determining a mounting state of the brake disk based on an output of the strain gauge. Means.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a mounting state inspection device, FIG. 2 is an exploded perspective view of the same, and FIG. is there.

FIG. 3 shows a disc brake device of an automobile viewed from the inside of a vehicle body, where N is a knuckle constituting a non-rotating portion of the present invention, D is a brake disc rotatably supported by the knuckle N, and C is a knuckle. A brake caliper fixed to N with bolts B, M is mounted on a knuckle N using the heads of the bolts B, and a mounting state inspection for checking whether or not the brake disc D is mounted perpendicular to the axle. Device.

As shown in FIGS. 1 and 2, the fixing means 1 for detachably mounting the mounting state inspection device M on the head of the bolt B includes a socket member 2, an adjusting member 3, a base member 4, It comprises an operating member 5, a connecting member 6, and a fastening member 7.

The lower surface of the socket member 2 is open and the upper surface is closed.
Cylindrical member with a bottom
Hexagonal hole 2 that can be fitted to the head of₁Is formed. hexagonal
Hole 2 ₁6 slits 2 on the outer circumference_Two… Formed in the axial direction
This slit 2 _Two... by hexagonal hole 2₁Is
Can be expanded and contracted to chuck the head of bolt B
You. A hexagonal hole 2 is provided on the outer periphery of the socket member 2.₁Reduce
Taper surface 2 pressed at the time_ThreeIs formed, and
The socket member 2 is fixed to the base member 4 on the upper surface of the
Male screw 2 for setting_FourIs formed.

[0012] Adjustment member 3 is an annular member external thread 3 ₁ is formed on the outer periphery, with can abut pressing surface 3 ₂ is formed on the tapered surface 2 ₃ of the socket member 2 to the inner periphery, the upper end Are provided with a pair of guide projections 3 ₃ , 3 ₃ .

[0013] internal thread 4 ₁ base member 4 which is formed male screw 3 ₁ and winding directions opposite to the male screw 4 on the same diameter of the adjustment member 3 on its lower surface to the external thread 2 ₄ of the socket member 2 is screwed ₂ is formed. The male screw 4 _2, the adjustment member 3 of the pair of guide protrusions 3 _3, 3 ₃ of the pair to engage in a freely vertically sliding guide grooves 4 _3, 4 ₃ are formed. Therefore, the adjusting member 3 is supported by the base member 4 so as to be relatively non-rotatable and slidable up and down.

[0014] operating member 5 is an annular member knurled 5 ₁ is applied to the outer periphery, the adjustment member 3 to the inner periphery thereof
A female thread 5 ₂ screwed to the external thread 3 _1, and the internal thread 5 ₃ screwed to the male screw 4 ₂ of the base member 4 is formed in the opposite directions to each other.

The connecting member 6 which is placed on the flange ₆₁ on the upper surface of the male screw 4 ₄ projecting from the upper surface of the base member 4, it screwing the internal thread 7 ₁ of fastening member 7 to the external thread 4 ₄ Fixed by Bolt holes 6 ₂ formed on the upper end of the connecting member 6 protrudes upward from the upper surface of the fastening member 7.

The connecting means 8 connected to the fixing means 1 includes a first link 9, a second link 10, and a connecting block 11
And a rod 12.

The proximal end of the first link 9 bolt 13, spring washer 14, angularly adjustably secured to the bolt holes 6 _second connecting member 6 via the flat washer 15 and nut 16, also leading end of the first link 9 Is fixed to the base end of the second link 10 via a bolt 17, a spring washer 18, a flat washer 19 and a nut 20 so as to be adjustable in angle. Tip of the second link 10 is bolt 21, it is angularly adjustably secured to the internal thread 11 ₁ of the connecting block 11 via a spring washer 22 and the flat washer 23. Then, the rod 12 slidably fitted in the through hole 11 _{and second} connection block 11 is protruded amount adjustably bolted 24.

At the distal end of the rod 12 of the connecting means 8, a base end of a brake disk contact member 25 formed by forming a thin stainless steel plate into a substantially rectangular shape is fixed. The tip of the brake disc contact member 25 is curved in a circular arc shape, the contact portions 25 ₁ capable of contacting the rear surface of the brake disc D is formed. The proximal end of the brake disk contact member 25 has become a narrow, flexible portion 25 ₂ of the contact portion 25 ₁ is deformed by a load applied from the brake disc D is formed.

Flexible part 2 of brake disk contact member 25
5 _2, well-known of the strain gauge 26 is affixed. The output of the strain gauge 26, the brake disk contact member 25 corresponds to the size of the blur amount of deformation of the flexible portion 25 ₂ due to the load applied from the brake disc D, i.e. the brake disk D is moved in the axle direction.

The mounting state determining means 27 for determining the mounting state of the brake disk D includes an A / D converting means 28 for converting the output of the strain gauge 26 into a digital signal, and a brake based on the output of the A / D converting means 28. Calculating means 29 for calculating a numerical value indicating the mounting state of the disk D;
And storage means 30 for storing the output of.

Next, the operation of the embodiment of the present invention having the above configuration will be described.

In order to inspect the mounting state of the brake disc D of a vehicle extracted for each of a predetermined number of vehicles manufactured in the factory or a vehicle in which a defect is found, the socket of the fixing means 1 of the mounting state inspection device M is used. Hexagon hole 2 ₁ provided in member 2
Is fitted to the head of a bolt B for fixing the brake caliper C to the knuckle N, and the operation member 5 is rotated.
By rotation of the operating member 5, the operating member 5 having a female screw 5 ₃ is screwed to the male screw 4 ₂ of the base member 4 is moved downward, and the external thread 3 ₁ is screwed into the female screw 5 ₂ of the operating member 5 The adjustment member 3 moves downward. When the adjustment member 3 moves downward, reduced in diameter at its press surface 3 ₂ lower slit 2 ₂ ... action of pushing the tapered surface 2 ₃ socket member 2, the hexagonal hole 2 ₁ a bolt B head Is firmly chucked.

When the mounting state inspection device M is fixed to the bolt B by the fixing means 1 as described above, the rotational position of the connecting member 6 is adjusted by the tightening member 7 and the bolt 1
3 and the bolt 17 adjust the angles of the first link 9 and the second link 10, and the bolt 21
2 Adjust the protruding amount, so the contact portion 25 ₁ of the brake disc contact member 25 is contacted with an appropriate pressure on the rear surface of the brake disc D.

[0024] Subsequently, the worker while jacking up the vehicle body rotates the tire by hand, the rear surface of the brake disk D rotates integrally with the tire sliding contact with the contact portion 25 ₁ of the brake disc contact member 25. At this time, if the brake disk D is not fixed perpendicularly to the axle, the back surface of the brake disk D is displaced in the axial direction of the axle with rotation, and the contact portion 25 of the brake disk contact member 25 that comes into contact therewith. ₁ presses the by deforming the flexible portion 25 _2. On the other hand, if the brake disc D is fixed perpendicularly to the axle, the flexible portion 25 ₂ to blur the brake disc D does not occur does not deform.

[0025] In Thus, the flexible portion 25 ₂ is deformed, for changing the output of the strain gauge 26 is accordingly, can be in the mounted state determining means 27 determines the quality of the mounting state of the brake disc D. At this time, it is possible to display a numerical value or a graph indicating the quality of the attached state on a display (not shown) or print out the image with a printer.

Further, by providing a means for detecting the rotation angle of the tire, and comparing the output of the means with the output of the mounting state determining means 27, it is possible to detect how the mounting state of the brake disc D is distorted. it can.

As described above, by using the strain gauge 26 having a smaller size than the conventional dial gauge,
The presence of the suspension arm makes it possible to mount the mounting state inspection device M on the back surface side of the brake disk D whose space is narrowed. Therefore, it is not necessary to remove the tires at the time of inspection to expose the front side of the brake disc D, and the working time can be greatly reduced. Further, since the mounting state inspection device M is fixed by using the head of the bolt B for fixing the brake caliper C to the knuckle N, there is no need to remove the brake caliper C to expose the bolt holes, and the work time is reduced. Not only is it significantly reduced, but also the mounting state inspection device M can be firmly fixed to perform an accurate inspection.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various design changes can be made.

For example, in the embodiment, the mounting state inspection device M is mounted by using the bolt B for fixing the brake caliper C to the knuckle N, but a nut may be used instead of the bolt B.

[0030]

As described above, according to the present invention, since the strain gauge having a smaller size than the conventional dial gauge is used for the mounting state inspection device, the suspension can be removed without troublesome tire removal. The mounting condition inspection device can be mounted on the back side of the narrow brake disk provided with the arm. Also, since the mounting state inspection device is mounted using bolts or nuts fastened to the non-rotating portion that rotatably supports the brake disc, it is not necessary to remove the brake caliper to mount the mounting state inspection device. , The working time can be greatly reduced. Moreover, since the mounting state inspection device is firmly fixed using the bolts or nuts, accurate detection is possible.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an installation state inspection device.

FIG. 2 is an exploded perspective view of the installation state inspection device.

FIG. 3 is a diagram showing a mounting state of the mounting state inspection device.

[Explanation of symbols]

B Bolt D Brake disk N Knuckle (non-rotating part) 1 Fixing means 8 Connecting means 25 Brake disk contact member 25 ₂ Flexible part 26 Strain gauge 27 Mounting state determination means

Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01B 21/22 F16D 69/04 G01B 5/25 G01B 7/315

Claims (1)

(57) [Claims] 1. A fixing means (1) detachably fixed to a bolt (B) or a nut fastened to a non-rotating portion (N) rotatably supporting a brake disc (D), and a brake disc (D). A) a brake disc contact member (25) made of an elastic body capable of abutting on the side surface of the brake disc; A strain gauge (26) provided on a flexible portion (25 ₂ ) of the contact member (25); and a mounting state determining means () for determining a mounting state of the brake disk (D) based on an output of the strain gauge (26). 27) An installation state inspection device for a brake disk, characterized by comprising: