JPH109283A - Clutch cover assembly and unbalance correcting method for clutch cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make fine correction of unbalance by forming a notch in response to the unbalance amount on the flange part of a clutch cover. SOLUTION: In making correction of the unbalance of an entire clutch cover assembly 1, at first the unbalance of the clutch cover assembly 1 is measured by the measuring equipment like a balancer. The notch forming position and notching amount of the flange part 2c of the clutch cover assembly body 1 are decided in response to this measured unbalance amount and direction. At this time, the position, on which the notch can be formed, is limited to the unbalance correction position 2d, for the strength of the flange part 2c. The notch is formed by cutting the unbalance correction position 2d of the flange part 2c from the outer periphery end. In this method, the bigness of the notch, namely a correction weight can be selected in a non-step. Thereby, the unbalance of the clutch cover assembly 1 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a clutch cover assembly and a method for correcting imbalance of a clutch cover.

[0002]

2. Description of the Related Art A clutch cover assembly is used to press a clutch disc against a flywheel. The clutch cover assembly includes a clutch cover fixed to a flywheel, and a pressure plate and a coil spring (or a diaphragm spring) provided inside the clutch cover. The pressure plate is for holding the clutch disc between the flywheel and the flywheel, and the coil spring (or diaphragm spring) is a member for biasing the pressure plate toward the flywheel.

A clutch device including the above-described clutch cover assembly rotates together with the flywheel, so that the rotation must be balanced to prevent vibration and the like. Therefore, in the clutch cover assembly, first, unbalance correction is performed for each component such as the diaphragm spring and the clutch cover, and after assembling them, the unbalance correction of the entire assembly is performed.

[0004] Conventionally, unbalance correction of the clutch cover assembly and the clutch cover is performed by welding a balance weight to a flange portion of the clutch cover to be attached to a flywheel, or by caulking a rivet into a hole previously provided in the flange portion. Is adopted. Also,
A method of correcting imbalance by drilling a hole in a flange portion has also been used. The method of correcting the imbalance by drilling this hole has the advantage of reducing the number of parts, though the correction range is narrower than the method of welding the balance weight or caulking the rivets.

[0005]

In the above method, the minimum correction range in the case of the unbalance correction is determined by the weight of the balance weight and the weight of the rivet. Therefore, it is difficult to finely correct the imbalance below these weights. Further, when correcting imbalance by drilling with a drill, it is possible to adjust the cutting weight of the flange part to some extent by changing the diameter of the drill, but the number of drill replacement steps increases and the work efficiency decreases.

SUMMARY OF THE INVENTION An object of the present invention is to reduce the unbalance of a clutch cover assembly or a clutch cover by an unbalance correction method capable of performing the unbalance correction more finely than the conventional method.

[0007]

According to a first aspect of the present invention, there is provided a clutch cover assembly having a clutch cover in which a flange formed on an outer peripheral portion is attached to a flywheel on an engine side. This is a method of correcting imbalance of a solid. This method of correcting the unbalance of the clutch cover assembly includes a step of measuring the unbalance of the clutch cover assembly and a step of forming a notch from the outer peripheral end of the flange portion of the clutch cover based on the measurement result of the unbalance. And

[0008] In the clutch cover assembly, the unbalance correction of the entire clutch cover assembly is performed after assembling the components that have already been corrected for the unbalance of the single unit. First, the unbalance of the entire clutch cover assembly is measured, and then the unbalance is corrected by forming a cutout from the outer peripheral end of the flange portion of the clutch cover based on the measurement result.

According to this method, the size of the notch, that is, the correction weight can be selected in a stepless manner, and fine correction of imbalance is possible. Thereby, the unbalance of the clutch cover assembly can be reduced. A method of correcting imbalance of a clutch cover according to a second aspect is a method of correcting imbalance of a clutch cover which is a component of a clutch cover assembly.

The method for correcting the unbalance of the clutch cover includes a step of measuring the unbalance of the clutch cover and a step of forming a notch in a flange formed on the outer peripheral portion of the clutch cover based on the measurement result of the unbalance. And

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A push-type diaphragm spring type clutch cover assembly 1 shown in FIG.
This is a device for connecting the clutch by pressing it to zero or releasing the clutch to disconnect the clutch. The clutch cover assembly 1 mainly includes a clutch cover 2, a pressure plate 3, a diaphragm spring 4,
And a cone spring 5.

The clutch cover 2 is a generally plate-shaped plate member, and its outer peripheral portion is fixed to the flywheel 50 by, for example, bolts. In the center of the clutch cover 2,
A large diameter hole is formed. A plurality of tags 2a are provided in the inner peripheral portion of the clutch cover 2 in the circumferential direction, and the tags 2a are bent toward the flywheel 50. The tip 2b of the tag 2a is bent radially outward by press working after the wiring 20, the diaphragm spring 4 and the wiring 21 are assembled.

The pressure plate 3 is an annular member having a pressing surface 3a formed on the side facing the flywheel 50. A friction member 51 of the clutch disc assembly is disposed between the pressing surface 3a and the flywheel 50. Further, the pressure plate 3 has a protruding portion 3b that protrudes in the axial direction on a side opposite to the pressing surface 3a.

The diaphragm spring 4 is a disc-shaped member disposed between the pressure plate 3 and the clutch cover 2 and supported by the clutch cover 2. The diaphragm spring 4 has an annular elastic portion 4a and an inner peripheral portion of the annular elastic portion 4a. And a plurality of lever portions 4b extending radially inward from the lever. The outer peripheral portion of the annular elastic portion 4a is in contact with the protrusion 3b of the pressure plate 3. The inner peripheral portion of the annular elastic portion 4a is supported by the clutch cover 2 (described later). In this state, the diaphragm spring 4 urges the pressure plate 3 toward the flywheel 50. A slit is formed between the lever portions 4b of the diaphragm spring 4, and an oval hole 4c is formed in an outer peripheral portion of the slit. The wiring 20, the inner peripheral portion of the annular elastic portion 4a of the diaphragm spring 4, and the wiring 21
a between the distal end portion 2b and the inner peripheral portion of the clutch cover 2. Thereby, the diaphragm spring 4
Are supported by the clutch cover 2.

Since the clutch device including the above-described clutch cover assembly 1 rotates at a high speed together with the flywheel 50, it must be balanced with respect to the rotation in order to prevent vibration and the like. Therefore, the unbalance correction of the clutch cover assembly 1 is performed so that the unbalance amount of the clutch cover assembly 1 falls within the allowable value. The correction of the imbalance of the clutch cover assembly 1 is performed first by the pressure plate 3 or the clutch cover 2.
After each component is unbalanced and assembled, the unbalance of the entire clutch cover assembly 1 is corrected.

In correcting the unbalance of the entire clutch cover assembly 1, first, the unbalance of the clutch cover assembly 1 is measured by a measuring device such as a balancer. In accordance with the measured amount and direction of the unbalance, the position and amount of the notch formed in the flange portion 2c of the clutch cover assembly 1 are determined. At this time, the flange 2c
Due to the above strength, the position where the notch can be formed is limited to the unbalance correction position 2d shown in FIG. Then, the unbalance correction position 2d of the flange portion 2c is cut from the outer peripheral end to form a notch.

In this method, the size of the notch, that is, the correction weight can be selected steplessly. In this regard, it is possible to make a finer correction of the imbalance as compared with drilling which is a means of the conventionally used imbalance correction method. Thereby, the imbalance of the clutch cover assembly 1 can be reduced. Also,
Because of the simple method of notching a part of the flange portion 2c, the number of parts is smaller than the conventional method of welding a balance weight to the flange portion and caulking a rivet to a hole provided in the flange portion in advance. And work efficiency is good.

Regarding the unbalance correction of the clutch cover 2 alone before assembling the clutch cover assembly 1,
This can be done in the same way as described above.

[0019]

According to the method of forming a notch in the flange portion of the clutch cover in accordance with the amount of unbalance,
The imbalance correction can be performed finely, and the imbalance of the clutch cover assembly and the clutch cover can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a clutch cover assembly as one embodiment of the present invention.

FIG. 2 is a partial sectional view in which a part of a clutch cover assembly is removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clutch cover assembly 2 Clutch cover 2c Flange part 2d Unbalance correction position 3 Pressure plate 4 Diaphragm spring 20 Wiring 21 Wiring 50 Flywheel 51 Friction member of clutch disc assembly

Claims (2)

[Claims] 1. A method of correcting an unbalance of a clutch cover assembly having a clutch cover in which a flange formed on an outer peripheral portion is attached to a flywheel on an engine side, wherein the unbalance of the clutch cover assembly is corrected. A method of correcting unbalance of a clutch cover assembly, comprising: a step of measuring; and a step of forming a notch from an outer peripheral end of a flange portion of the clutch cover based on a result of the measurement of the unbalance. 2. A method for correcting imbalance of a clutch cover which is a component part of a clutch cover assembly, comprising: a step of measuring the unbalance of the clutch cover; and Forming a notch in a flange portion formed on an outer peripheral portion of the clutch cover.