JP2002267434A - Method and apparatus for measuring position of set block in torque converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for measuring the position of a set block that is mounted to the outer periphery of a front cover in a torque converter and for measuring the position of screw hole of pluralities of set blocks simultaneously and quickly. SOLUTION: Screw gauges 15, 15, and the like are screwed into the screw holes of each of set blocks 4, 4, and the like for raising perpendicularly, a collet chuck 7 is fitted to a center piece 5 that is mounted to the center of the torque converter for centering, and the amount of deviation is obtained by measuring and calculating the position of the screw gauge 15 using a pair of electric micrometers 13a and 13b that are mounted in a radius direction and in a direction that is vertical to the radius direction are measurement sections 11, 11, and the like being provided at a specific position from the collet chuck 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a measuring device for measuring the positional accuracy of a set block of a torque converter.

[0002]

2. Description of the Related Art As is well known, a torque converter is a type of joint capable of transmitting the power of an engine to a transmission using a working fluid as a medium. The torque converter is delivered by a pump impeller rotated by the engine and the rotation of the pump impeller. The turbine runner rotates in response to the movement of the working fluid, and further includes a stator that changes the direction of the working fluid exiting the turbine runner and guides the working fluid to the pump impeller.

FIG. 4 is a sectional view of a general torque converter. FIG. 4A shows a pump impeller, FIG. 4B shows a turbine runner, and FIG. 4C shows a stator. A working fluid is sealed in the converter outer shell (d), and the rotation of the engine crankshaft (e) is transmitted to the front cover (f) of the outer shell (d) to rotate the pump impeller (a). I do.
Then, with the rotation of the pump impeller (a), the turbine runner (b) starts to rotate with the working fluid as a medium, and while the rotation speed difference between the pump impeller (a) and the turbine runner (b) is large,
The turbine runner (b) is rotated at a large torque ratio by the torque amplification effect due to the presence of the stator (c),
When the rotational speed difference becomes small, the torque amplifying function stops and the pump runner (a)
Power is transmitted to (b).

A plurality of set blocks (g) are fixed to a front cover (f) of the torque converter by welding or the like, and a drive plate screwed to an end surface of an engine crankshaft (e). The outer periphery of (h) is connected to the above set blocks (g), (g) ... with screws. The center piece (i) fixed at the center of the front cover (f) fits into a hole (nu) provided at the center of the end face of the crankshaft (e), and the torque converter and the crankshaft (e) fit together. They are concentric.

The drive plate (h) screwed to the end face of the crankshaft of the engine has its outer periphery screwed to the set block, but each set block (g) welded to the outer periphery of the front cover (f). (G) The position must be accurate. If the position of the set block (G) is not correct, it cannot be screwed to the drive plate (H), and even if it is screwed, the stress based on the transmission torque will concentrate and cause fatigue failure. .
Therefore, in order to check whether each set block (g), (g),... Is correctly attached, the position accuracy is measured.

FIG. 5 shows a conventional measuring method using a three-dimensional measuring machine. The torque converter is mounted on a table (e) placed on a table (e), and each set block (e),
Screw gauges (W) and (W) are screwed into the screw holes (G) and stand upright. Needless to say, the table (e) is capable of correctly supporting the torque converter horizontally, but the center of the torque converter mounted on the table (e) can be obtained by measuring the center piece (i). .

[0007] The three-dimensional measuring machine has a measuring terminal (f). By moving the measuring terminal (f) or moving the table, the position of the centerpiece (i) serving as the center is measured, and the centerpiece is measured. For each screw gauge (W), (W) ...
Measure the position of. By measuring the outer peripheral position of each screw gauge (W), (W) ..., the center of the screw hole of the set block (G), (G) ... is calculated. It takes time. In addition, installing a high-performance three-dimensional measuring machine at a manufacturing site is susceptible to temperature, humidity, vibration, and the like, and has environmental problems.

[0008]

However, measuring the position of the set block has the above-mentioned problems. The problem to be solved by the present invention is this problem, and provides a measuring method and a measuring device that can accurately measure the attachment position of a set block in a short time.

[0009]

In order to measure the position of the set block according to the present invention, the center piece is positioned by a collet chuck, and the positions of a plurality of screw gauges screwed into the screw holes of the set block are simultaneously measured. That is, there is a measuring unit in the outer direction around the collet chuck, and the measuring unit has an electric micrometer or the like in the X direction and the Y direction (radial direction centering on the collet chuck and a direction perpendicular thereto). Are arranged in pairs, and the positions of the screw gauges are measured by these two measuring instruments. Here, the screw gauge is relatively long, and by measuring the position of the screw gauge at different heights, the fall of the screw gauge can be measured simultaneously. It can be obtained by measuring the outer circumference of the screw gauge in the X and Y directions by a measuring device and calculating the amount of deviation of the center position.

[0010] The measuring units are provided by the number of set blocks, and the positions of all the set blocks can be measured simultaneously. The collet chuck and the measuring unit can be moved up and down, and when the collet chuck is fitted on the centerpiece, the weight is balanced so that the weight of the measuring device does not affect the measured value. The collet chuck has a cylinder so that it can move up and down independently of the measuring unit. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0011]

1 is a schematic view showing a set block position measuring device of a torque converter according to the present invention. In FIG. 1, 1 is a torque converter (the internal structure is omitted), 2 is a stand, and 3 is a measuring device. Represents. The table 2 is a part of the measuring device 3 and is connected to each other. The torque converter 1 is placed on the table 2 and placed horizontally. Therefore, the set blocks 4, 4,...
Are arranged at equal intervals around the.

The measuring device according to the present invention is characterized in that the center piece
This is a device that can simultaneously measure the position of each set block 4, 5,. A collet chuck 7 is provided at the center of the disk 6, and the collet chuck 7 is fitted on a cylindrical guide 8 fixed to the disk 6, and is vertically moved by a cylinder 9 mounted on the disk. You can do it.

The collet chuck 7 is formed in a cup shape, and the lower end of the inner periphery expands outward to extend the center piece 5.
It is stuck in. That is, by enlarging the lower end portion in a trumpet shape, if the collet chuck 7 descends, the collet chuck 7 is easily fitted to the center piece 5, and the center piece 5 is correctly positioned there. In this case, collet chuck 7
Is moved simultaneously with the lowering of the center piece 5 so that the collet chuck 7 is located coaxially with the center piece 5. That is, centering is performed.

The disk 6 is suspended from above and can move up and down. The disk 6 has a spring balancer 10 above and balances the weight of each member mounted on the disk 6 with the weight of each member. Has been taken. Therefore, when the collet chuck 7 is fitted to the center piece 5, the balance is adjusted so that the entire weight of the measuring device 3 does not act on the center piece 5.

On the outer periphery of the disk 6, the measuring units 11, 1
, And the measuring unit 11 has a pipe 1 of a predetermined length.
2 and electric micrometers 13a and 13b are horizontally mounted in pairs at the lower part of the pipe 12.
At the lower part of the pipe 12, a support portion 14 protruding outward is formed, and the support portion 14 has an electric micrometer 1 mounted radially around the collet chuck 7.
3a and an electric micrometer 13b perpendicular to the radial direction.

One electric micrometer 13a is a disc 6
Of the other electric micrometer 1
3b is perpendicular to the radial direction, but the threaded holes of the set blocks 4, 4,.
5 are screwed together and stand upright, and the electric micrometer 13
a and 13b can measure the position of the screw gauge 15. In this case, the pointed electric micrometer 1
If the tips of 3a and 13b are in direct contact with the outer peripheral surface of the screw gauge 15 having a curved surface, an error occurs. Therefore, a dock having a flat surface is interposed therebetween.

On the outer periphery of the disk 6, there are provided measuring units 11, 11... Corresponding to the number of the set blocks 4, 4,..., And thread gauges 15, 15,. The disk 6 of the measuring device 3 is lowered so as to fit into 12, 12,. Then, the collet chuck 7 is fitted on the center piece 5, and the center of the torque converter is positioned.

Here, it is not always necessary to provide the pipe 12 in which the screw gauge 15 fits in the measuring section 11.
By fitting the screw gauge 15 on the disk 2, rough positioning when the disk 6 is lowered can be performed. When the thread gauge 15 is fitted to the pipe 12, the electric micrometer 13a,
13b is operated to measure the position of the screw gauge 15. At this time, the inclination of the screw gauge 15, that is, the inclination of the screw hole of the set block 4 can be measured by measuring two appropriate positions where the vertical position of the screw gauge 15 is different.

FIG. 2 shows that the docks 17a and 17b are in contact with the outer peripheral surface 16 of the screw gauge 15, and the docks 17a and 17b are at the tips 18a and 18 of the electric micrometers 13a and 13b.
This is the case where b is in contact. Since both ends of the docks 17a and 17b are parallel flat surfaces, the screw gauge 15
Is accurately measured. FIG. 3 shows the measurement positions of the six set blocks 4, 4,. Of course, the directly measured objects are the screw gauges 15, 15,..., But the positions of the screw gauges 15, 15,.

The ideal center of each set block 4, 4,...
, And the measured center is indicated by ○. That is ○
The distance between and ● is expressed as the amount of deviation. If this circle exceeds a predetermined area (large 〇), set blocks 4 and 4
Are regarded as defective products because the position is outside the allowable range. On the other hand, if the measurement positions of the screw gauges 15, 15,... Are two upper and lower positions, they can be displayed with different marks (for example, ◎) in FIG. You can know the inclination.

The measuring device of the present invention is an electric micrometer 1
The outer circumference in the X direction and the Y direction of the screw gauge, which is screwed into the screw hole by 3a and 13b and stands, is directly measured. Then, the measured value is calculated by a computer to determine the amount of deviation of the center position. Here, the measuring instrument is not limited to the electric micrometer 13 that measures by directly contacting, but a non-contact measuring instrument can also be used.

As described above, the position measurement of the set block according to the present invention includes a plurality of measurement units provided with a measurement device such as an electric micrometer arranged in pairs at the position of the set block. In addition, the collet chuck is fitted to the center piece of the torque converter, and the position of the screw gauge that is screwed up into the screw hole of the set block and can be simultaneously measured by a measuring instrument such as the electric micrometer. The following effects can be obtained.

[0023]

The measuring device of the present invention has a plurality of measuring portions at positions where the set block is attached, and the measuring portions are provided in a radial direction centering on the collet chuck and in a direction perpendicular thereto. A measuring instrument such as an electric micrometer is attached. Therefore, the position of the screw gage which is screwed into the screw hole of the set block of the torque converter mounted on the stand and can be measured can be measured at once by a measuring instrument such as the electric micrometer. That is, the measurement can be performed instantaneously, and the workability becomes very high.

Each measuring section is provided at an equal distance from the collet chuck provided at the center. When the collet chuck is fitted on the center piece, the position of the set block is measured with respect to the center piece. . Further, the measuring device is provided with a balancer, so that even if the collet chuck is fitted to the center piece, its weight does not act and does not affect the measuring accuracy. Furthermore, if the length of the screw gauge rising from the set block is set to an appropriate length, and measurement is performed at two locations above and below,
The inclination of the screw gauge, that is, the inclination of the screw hole of the set block can be known.

[Brief description of the drawings]

FIG. 1 shows a measuring device according to the present invention.

FIG. 2 shows a case where a screw gauge is measured by a pair of electric micrometers.

FIG. 3 is a diagram illustrating a measurement result of a set block.

FIG. 4 is a sectional view of a torque converter.

FIG. 5 shows a measurement state using a three-dimensional measuring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Torque converter 2 units 3 Measuring device 4 Set block 5 Center piece 6 Disk 7 Collet chuck 8 Cylindrical guide 9 Cylinder 10 Spring balancer 11 Measurement part 12 Pipe 13 Electric micrometer 14 Support part 15 Screw gauge 16 Outer peripheral surface 17 Dock 18 Tip

Claims (5)

[Claims] In a method for measuring the position of a set block attached to the outer periphery of a front cover of a torque converter, a torque converter is mounted horizontally on a predetermined table, and a screw gauge is provided in a screw hole of each set block. It is screwed upright and stands upright. The collet chuck is fitted to the center piece attached to the center of the torque converter to perform centering. Also, at predetermined positions from the collet chuck, measuring units are provided at equal intervals, and the measuring unit is installed. The position of the screw gauge is measured and calculated by a pair of measuring instruments such as an electric micrometer mounted in a radial direction centering on the collet chuck and in a direction perpendicular to the collet chuck to obtain a positional deviation amount. Method for measuring the position of a set block in a torque converter. 2. The method for measuring the position of a set block according to claim 1, wherein the upper and lower positions of the screw gauge are measured with a measuring instrument such as an electric micrometer. 3. An apparatus for measuring the position of a set block attached to the outer periphery of a front cover of a torque converter, comprising: a table for horizontally mounting the torque converter; A collet chuck that can be fitted to a center piece attached at the center and that can be centered is provided above, and a measuring unit is provided at a predetermined position from the collet chuck at equal intervals, and a collet chuck is attached to the measuring unit. A pair of measuring instruments such as a pair of electric micrometers attached in a radial direction with respect to the center and in a direction perpendicular to the center are attached, and the collet chuck and the measuring section are vertically movable, while a measuring device is used for measurement. Characterized in that a balancer is provided so that no load is applied to the torque converter. Set block position measuring device. 4. The method and apparatus for measuring the position of a set block in a torque converter according to claim 3, wherein a pipe in which a threaded gauge that is screwed up into the screw hole of the set block fits is provided in the measuring section. 5. The set block of a torque converter according to claim 3, wherein a cylinder is provided in the collet chuck, and the collet chuck can be moved up and down independently of the measuring unit by the cylinder. Position measuring device.