JPS6279327A - Apparatus for measuring companion deflection of differential for vehicle - Google Patents

Abstract

PURPOSE:To rapidly and accurately determine synthetic deflection quantity in a radius direction to an imaginary joint point, by respectively detecting the core deflection, face deflection and angle of rotation of a connection part. CONSTITUTION:A socket cylinder 32 is engaged with the clamp nut 35 of a companion assembly 34 and the whole of the assembly is rotated by a motor 28 to perform the zero setting of a rotary encoder 31 while core deflection, face deflection and angle of rotation are respectively detected by a core shift measuring element 37, a face deflection measuring element 38 and the encoder 31 to be inputted to a computer. By this method, accurate synthetic deflection quantity in the radius direction of the center of rotation is calculated to check whether said deflection quantity is within a tolerant range. Therefore, the deflection vibration in the connection structure between a companion and a joint york can be rapidly and accurately determined.

Description

[Detailed description of the invention] [Industrial use! l! )] The present invention relates to a device for measuring the runout of a companion of a vehicle differential.

[Prior Art] Generally, as shown in FIG. 3, a companion 3 attached to a drive pinion 2 of a vehicle differential gear device l has a bolt between a flange 4 of the companion 3 and a universal joint. - They are fastened and fixed to each other with nuts, etc., and are connected to the propeller shaft (not shown) via this universal joint.

In this case, if there is any misalignment At or surface runout between the companion 3 and the joint yoke 5 for some reason, vibrations due to rotation will increase.

Therefore, in the past, the hole misalignment and the runout of the companion 3 were measured separately, and when either the hole center misalignment or the runout exceeded the allowable error, 1, -1 + burin? - Ura 7zu White J - Haku 1 Sky 7J1 Te Roto However, it is hard to say that it is the best judgment to judge that it is defective because either the hole center deviation or the runout exceeds the allowable error. ,
If hole misalignment and runout cancel each other out, even if only one of them is judged as "defective", when the runout is observed as a whole, the runout may only be within the allowable error range. be.

Needless to say, the conventional individual determination method described above has a problem in that it is not possible to make a comprehensive shake determination.

[Object of the Invention] An object of the present invention is to provide a companion runout measurement device for a vehicle differential that can comprehensively determine runout vibration in a connection structure between a companion and a joint yoke of a vehicle differential. be.

[Structure of the Invention] Therefore, the present invention provides a rotary drive means for rotating the companion around an axis, a run-out detector that contacts the flange surface of the companion, and an inner peripheral surface of the yoke fitting hole of the companion. A hole position detector, a calculating means for calculating the total amount of runout in the radial direction with respect to the virtual joint point of the joint yoke in response to each detected value, and a determining means for determining whether the total amount of runout is within the reference runout wL range. prepare for,
This is a companion runout measuring device for a vehicle differential.

[Effects of the Invention] According to the present invention, it is possible to comprehensively judge the run-out vibration of the companion, and therefore, it is possible to make a more accurate judgment in accordance with the actual situation.

[Example] Examples of the present invention will be specifically described below.

As shown in FIG. 1, the main parts of this measuring device, the entire measuring head 11 is guided by a guide rail 13 installed vertically on a frame 12 of the main body of the device so as to be vertically movable. On the device body frame I2 side, there are provided an elevation drive motor 14 installed at the top and a screw shaft 15 that is rotatably supported by the device body frame 12 around a vertical axis and is rotationally driven by the drive motor 14. ,
By screwing the threaded portion of the screw shaft 15 into an arm 16 extending horizontally from the measuring head 11, the measuring head 11 is raised and lowered by screw feeding in the vertical direction.

The measuring head 11 is a screw shaft! The measuring head frame 17 has an elevating frame I7 fixedly connected to an arm 16 which is screwed into the measuring head frame I7, and a measuring head frame I8 which is movable up and down relative to the elevating frame I7. Measuring head frame! 8 is vertically guided by a pair of guide rods I 9 (19) supported vertically on the lifting frame 17 and a guide bush 20 slidably fitted to the guide rods I9 (19), and is vertically supported on the lifting frame 17. It is connected to a plunger (not shown) of a lifting cylinder device 21 installed facing downward, so that the measurement head frame I8 can be raised rather than lowered by the operation of the lifting cylinder device 21.

The measurement head frame 18 is provided with the following.

The rotating shaft 22 is rotatably supported by a pair of upper and lower bearings 24 and 25 in the bearing box 23, but not relatively displaceable in the vertical direction. A driven pulley 26 for a timing belt is coaxially and non-rotatably attached to the upper side of the rotating shaft 22. This driven pulley 26 is provided with a driving pulley 29 attached to the rotating shaft of an electric motor 28 installed on a motor installation stand 27, and a timing belt 30 is stretched between both pulleys 26 and 29. The rotating shaft 22 can be rotated by driving the rotating shaft 28. The upper end of this rotating shaft 22 is connected to the input shaft of a rotary encoder 31 installed on the top of the measurement head frame 18, so that the rotation angle of the rotating shaft 22 can be accurately detected by the rotary encoder 31.

On the other hand, a socket cylinder 32 for rotational driving is fitted into a flat cutout on the lower side of the rotating shaft 22 so as to be non-rotatable and slidable within a certain range in the axial direction. /
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It is energized by +^. The lower part of the socket cylinder 32 is formed as a fitting part 32a that fits from above into the fastening nut 35 of the companion assembly 34 to be measured, and is used for positioning in the height direction when fitting with the fastening nut 35. A stopper pin 36 is fixed at the center of the shaft.

The above-mentioned rotating shaft 22, means for rotationally driving it (26 to 3
0), the socket tube 32, and the like constitute rotational driving means for the companion assembly 34.

As shown in FIG. 1, a misalignment measuring element 37 and a deflection measuring element 38 are arranged near the socket cylinder 32. The misalignment a+++ constantor 37 includes a contact 37a that contacts the inner surface of the circular hole 39a of the flange 39 of the companion assembly 34, and detects misalignment of the companion with respect to the axis of the rotating shaft 22.

On the other hand, the surface runout measuring element 38 contacts the end surface 39b of the flange 39 of the companion assembly 34, and
The amount of vibration of 9 is detected.

Next, one measurement operation of the measuring device having the above structure will be explained.

As shown in FIG. 2, in step #l, the companion assembly 3.1 as a workpiece is set correctly, and then the measuring head 11 is set at a predetermined height using the screw feeder groove (14°15, IG). Step #2).

Next, start the lifting cylindrical ladder 21 (step #3),
To measure, lower the entire Rad frame 18 and lower the socket tube 32.
into the fastening nut 35 of the companion assembly 34, start the electric motor 28, and rotate the entire companion assembly 34 around the vertical axis (Step #4
．． #5).

Next, the rotary encoder 31 is set to zero, measurement is started, and the center runout is measured using the misalignment measuring element 37, and the runout is measured using the eccentric measuring element 38 (#7, #8).

The measured deflection ff1F and hole misalignment F are as follows:
Each of the signals is displayed and input to the microcomputer 40 as a signal input. This microcomputer 4
The rotation angle θ (with 0 point as the base point) detected by the rotary encoder 31 is also input to 0.

The microcomputer 40 to which each of the above signals is manually input calculates a composite runout report in the radial direction with respect to the correct rotation center from the rotation angle at which the misalignment and runout are maximum, the misalignment, the relationship between the runout and the rotation angle, The maximum value of the combined shake amount is displayed (#9), and it is determined whether the maximum value is within the allowable range (JIO). The above calculation of the combined shake amount can be performed, for example, as follows.

2 = □ In addition, Q is the distance to the support center of the joint yoke assembled to the companion 4 in Fig. 3, R is the radius of the contact point of the runout measuring element 38, and 0 is the distance between the surface runout direction and the hole center. This is the angle formed with the direction of deviation.

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s*+n-I old", 1-1/#l+), the rotation angle at the time of stop is read from the encoder 31, and if it is not at the predetermined stop phase, the measuring head II is rotated (#12)
When a predetermined stop position is reached, the rotation of the measurement head I"+1 is stopped (#I3), the measurement head frame 18 is raised (#14), and the entire measurement head 11 is raised ( #15), - complete operations.

As described above, this measuring device u detects the runout that is a combination of both the misalignment and the runout of the companion assembly, so it is possible to quickly and accurately determine pass/fail.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional front view of main parts of a companion runout measuring device for a vehicle differential according to an embodiment of the present invention, and FIG.
The figure is a flowchart showing one measurement operation of the above measuring device.
The figure is a cross-sectional view of a differential gear device for a vehicle. 3...companion, 5...joint yoke,
22... Rotating shaft, 28... Electric motor, 31...
- Rotary encoder, 32... Socket/Soto tube, 37... Misalignment measuring element, 38... Surface runout measuring element, 10... Microcomputer.

Claims (1)

[Claims] (1) This is to measure whether the joint point is within the standard range when the joint yoke is assembled to the companion attached to the drive pinion of a vehicle differential, and the companion is rotated around its axis. a surface run-out detector that comes into contact with the flange surface of the companion; a hole position detector that comes into contact with the inner peripheral surface of the yoke fitting hole of the companion; A companion runout measuring device for a vehicle differential, comprising a calculation means for calculating a total runout amount in a radial direction with respect to a point, and a determination means for determining whether the total runout amount is within a reference runout range.