JPS5851059A - Grinding accuracy improving apparatus for brake disk grinder - Google Patents

Abstract

PURPOSE:To improve the grinding accuracy and permit right and left grinders to be worn-away uniformly by properly setting the sliding resistance between the supporting cylinder of a bracket and the guiding rods and permitting the lateral deflection of grindstones along the brake disk surface within a limit. CONSTITUTION:A bracket 3 is installed on a carrier supporting body 2, and a pair of guiding rods 4 are supported slidably by the bracket 3. The bearing frames 5 and 5a arranged oppositely to the both surfaces of a brake disk 6 are slidably supported by the guiding rods 4, and the disk 6 is clamped by grindstones 7 and 7a. The pushing member 27 as the means for properly setting the sliding resistance between the supporting cylinder 3a of the bracket 3 and the guiding rods 4 is pushed to operate a pushing rod 15. As the pushing rod 15 is screw-fixed 14 with a feeder 16, a fixing frame 12 and the guiding rods 4 are pushed, and the whole equipment begins to shift. The sliding resistance is set by reading the value on the scale 28 of the pushing member 27 and allowing said value to coincide with the value obtained on a test machine beforehand.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for improving the grinding accuracy of a brake disk grinding device for an automobile.

In recent years, disc brakes have been increasingly adopted as braking devices for automobiles. And the brake disc expands, and the contact surface with the plexi island comes out.
Particularly in cold regions where salt is sprayed to prevent roads from freezing, if the brake disc is exposed to water for a month or two after use, rust will form on the surface of the brake disc, resulting in a smooth braking action. Because you won't be able to do it.

It is desirable to remove rust and repair the roof before riding.

So, (11) How to remove the brake disc from the car and grind it, (2) How to install a polishing device in place of the brake disc, rotate the brake disc with the engine and use a grinding wheel to bring it in place. It is known.

On the other hand, to obtain smooth braking action, brake disc
Since accuracy in terms of iiisuc, wall thickness, etc. is strictly required, a highly accurate grinding device is also required6.

Although the method of Maekokuchi 1 does not ensure the accuracy of the disc itself,
It is not guaranteed that it will be in good condition when installed.
Since it requires expensive grinding equipment, it takes time to remove and install the brake disc from the axle, making it uneconomical. (
Method 2) also has the problem of accuracy, even if the rust is removed.

The present applicant previously proposed the above type (2) (see Japanese Patent Application No. 159084/1984). That is, the caliper support body 2 is provided with a roughly U-shaped bracket 6 that is attached to replace the caliper, and a pair of guide rods 4, 4 are slidably supported on this bracket in parallel with the axle shaft 1. The b-bearing frames 5, 5a facing both sides of the brake disc 60 are slidably supported by the guide frames 4, 4, and the brake disc is removed by grinding wheels 7, 71 attached to the bearing frames 5, 5& with shafts 8, 8a. 6 is held floatingly from both sides. 9 Grinding wheel holder integrated with Hiroshaku 8a, 10
The company whetstone retainer, 11 is its set screw.

A fixed frame 12 is attached to the above-mentioned pair of guide rods 4 and 4, and a push rod 15 that can be moved gradually through a screw 14 with a manual knob 13 is attached to the fixed frame 12.
is supported, one bearing frame 5 is pushed in the direction of the grinding wheel axis, and at the same time the other bearing frame 5a is pulled. .

The screw mechanism for advancing and retracting the push rod 15 is arbitrary.

In the illustrated example, the feeder 16 is rotatably fitted into the hole of the fixed frame 12, and the knob 13 is inserted into the feeder 16 with the screw 1.
7, and insert the screw 1 of the push rod 15 into the screw hole of the feeder 16.
It is named after the number 4.

18 indicates metal, and 19 indicates a down thrust bearing.

On the other hand, in cases where *a occurs uniformly over the entire surface of the brake disc 6, IC often occurs in one part of the '&-0 station m1), and when viewed from above, it appears in a wave shape on that surface. It may also stick.

In such a case, the dynamic resistance of the guide rod 40 of the bracket 3 against the guide rod support tube 3a is too small.

Both grinding wheels 7 and 7a have a brake disc 60 wave surface.
It vibrates from side to side, resulting in low grinding efficiency. The deflection varies depending on the weight of the entire moving part.

It depends on the magnitude of the above-mentioned sliding resistance.

Then, increase the sliding resistance and press the above runout, t, Q
If the grinding wheels 157 and 7a are restricted to be ground by rotation following the plane of the brake disc 6, problems such as uneven wear of the grinding wheels 7 and 7a will occur, so it is necessary to allow a runout line of 11 degrees. be.

In view of the above experience, the present invention is based on the support tube 3 & bracket 6.
By setting the sliding resistance between the guide rod 4 and the grinding wheels 7 and 7a appropriately,
This is to improve grinding accuracy and ensure uniform wear of both grinding wheels by storing left and right runout within limits, similar to the brake disk.

As a means for doing so, the push rod 15 is provided with step holes 21 to 21 in the longitudinal direction.
25 are provided, and the spring receiving rod 24 is inserted through these holes so as to move forward and backward through the elongated hole 25 and the rotation pin 26. A pusher 27 is attached to the outer end of the O receiving rod 24.
is fixed, and a spring 28 is housed between the rib and the hole 220 stage 22&. 29 is a scale provided on the expansion pusher 27.

Further, as shown in FIG. 4, a sleeve 60 is interposed between the support cylinder 6& and the guide rod 4, and the press screw 511F adjusts the degree of pressure contact of the sleeve SO with the guide rod 4.
Adjust the sliding resistance between the support tube 5a and the support tube 5a. Note that a rotation stopper is provided between the support cylinder 3a and the sleeve SO.

In Fig. 3, 52B@ring, 35 enlarged snap spring, 34
This is the ring that holds down the 150-piece rod 1Sa, and the 35-piece mounting screw.

Is the grinding machine attached to the car O1 as shown in Figure 2? When attached to the Yaripa support 2 and pushing the pusher 27 while the grindstones 7 and 7a are not in contact with the brake disc 6, the receiving rod 24 also moves back together. At this time, the pusher 27 expands the coil spring 28 and pushes the push rod 15 through the hole R22&. Push rod 15 is feeder 1
6 and screw connection 14, the fixed frame 12. Guide rod 4
- 4 is pressed and the entire device begins to move to the left in the diagram. Conditions at that time Spring 280 Compression resistance F> Support tube S
There is a relationship between s.3a and the sliding resistance f4D of the guide rods 4.4.

Above is the engraved eye of the O pusher 27 IC! Read the value of &28 on the outer end surface of the push rod 15, so that the value approximately matches the value determined in advance by the test machine.

The sliding resistance of the sleeve 500 to the guide rod 4 is set using the push screw 51.

As described above, desired grinding time and accuracy can be obtained.

[Brief explanation of drawings]

FIG. 1 is a front view of the second WA person-to-person view of the device of the present invention. FIG. 2 is an enlarged longitudinal sectional side view of an enlarged part, FIG. 3 is an enlarged longitudinal sectional view of -s, and an enlarged longitudinal sectional view of a sliding resistance adjustment mechanism section for the 4th wA expansion guide rod. 1 is the axle of the car, 2 is the caliper support, S is the bracket, 4 is the guide rod, and 5m is the guide rod support tube. 5 and 5a are bearing frames, 6 is a brake disc, 7 and 7a are grindstones, 27 is a pusher for measuring sliding resistance, 28 is a scale, 60 is an enlarged sliding resistance w4ilii sleeve, and 31 is its one-section push screw. hand (times)

Claims (1)

[Claims] (1) A pair of guide rods parallel to the axle are provided on a bracket attached to a caliper support in an automobile brake, and a pair of bearing frames in which at least one of the guide rods is slidably supported. The grindstone is rotatably supported on the
In the disc grinding machine during play, the pair of 011 stones are used to floatingly pinch and grind the brake disc from both sides. A mechanism for measuring the sliding resistance of the bearing frame with respect to the guide rod. A grinding precision improving device characterized by having a mechanism for adjusting the sliding resistance by 11!1.