JPH0769128B2 - Wheel runout inspection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a shake inspection device for an automobile wheel, and simultaneously measures the shake of the flange portions at both ends in the width direction of the wheel rim and simultaneously measures the average value thereof. The present invention relates to a shake inspection device.

[Conventional technology]

After the wheel is manufactured, it is inspected and confirmed that the runout in the width direction (lateral runout) of the flange portion of the rim and the radial runout (longitudinal runout) of the bead seat portion of the rim are within the allowable values.

Conventionally, the runout inspection is performed individually for the flange portion and the bead seat portion on both ends of the rim of one wheel in the width direction both ends of the rim, and first for the flange portion and the bead seat portion on one side. The horizontal runout and vertical runout were inspected, and then the wheel was detached from the inspection jig and reversed and set on the inspecting jig, and the horizontal runout and vertical runout were inspected with respect to the flange part and bead seat part on the other side. .

[Problems to be solved by the invention]

 The conventional shake inspection has the following problems.

B. The time and amount of work required for the runout inspection of one wheel are
The time and work required for the runout inspection of the flange portion and the bead seat of the rim at each end are almost doubled, and the inspection time and work amount are enormous.

B. It can be said that both horizontal shake and vertical shake, but the average value of the runouts of the flanges at both ends and the average value of the runout of the bead seats (this average value is actually a problem for ride comfort).
When measuring the amount of runout, the circumferential position of the wheel that causes the runout is also measured, and the runouts of the flange and bead seat parts at both ends are added at the same circumferential position and divided by 2 to obtain the average value. It requires an extra complicated calculation work such that

[Means for solving problems]

Such a problem is caused by individually measuring the runout of the flange portion and the bead seat portion of the rim for each end in the wheel width direction. In order to deal with this, it is conceivable to set a conventional shake inspection jig at each end in the wheel width direction and inspect the shake of two flange portions and a bead seat portion at the same time. For example, two jigs are required for each of horizontal shake and vertical shake inspection, which increases cost, and the average value is calculated from the shake amount obtained by the two test jigs to obtain the average shake value. It will be necessary to install a computer that asks for.

The problems (1) and (2) can be solved by the means provided by the present invention without the above-mentioned increase in cost and computer installation.

Means according to the present invention provides a wheel holding and rotating unit for holding and rotating a wheel and a lateral runout of each of the flange portions at both ends of the wheel held and rotated by the wheel holding and rotating unit in the same circumferential direction of the wheel. A lateral shake measurement unit that simultaneously measures the lateral shake of both flange portions and simultaneously measures the lateral shake, and the lateral shake measurement unit has two lateral shake measurements arranged at the same circumferential position of the wheel. Rollers, two rack shake measuring rollers, two rack shafts each performing the same movement in the rim width direction, and two dials each measuring the axial movement of each of the two rack shafts. A gauge and a pinion that meshes with the two rack shafts and is floatingly supported between the two rack shafts, and is itself rotationally biased. A rotary actuator in which the rotational urging directions of the pinions are set in directions urging the two rack shafts in opposite directions so as to separate the two rack shafts in the lateral shake measurement roller gullim width direction, A lateral vibration average value measuring dial gauge for measuring the movement of the rotary actuator in the rim width direction, and a vibration measuring device for a wheel.

[Action]

In the above-described device of the present invention, the two lateral shake measuring rollers are constantly pressed in the wheel axial direction to the flange portions at both ends of the wheel rotated by the wheel holding and rotating unit by the urging force of the rotary actuator, and the respective flanges are measured. By detecting the amount of lateral runout of each part and reading the two dial gauges, the amount of lateral runout of the flange parts at both ends in the axial direction of the wheel can be measured. Since the rotary actuator meshes with the two rack shafts and is floatingly supported between the two rack shafts, the rotary actuator always automatically adjusts the position to an intermediate position between the two lateral shake measuring rollers displaced in the wheel axis direction. The average value of the lateral shake of the two flange portions can be measured by reading the movement with a dial gauge for measuring the average value.

Since the two lateral shake measuring rollers are pressed against the flange portion by the mutually opposing axial biasing forces generated by the rotational biasing force of the pinion that is floatingly supported, the axial force acting on the entire rim becomes 0, and during measurement, Does not cause axial deflection of the wheel disc. Therefore, the average lateral shake value measured by the average value measuring dial gauge is an accurate average lateral shake value that does not include an error due to the bending of the disk, and is a highly accurate measurement.

The concept based on this is also applicable to the vertical runout inspection of the bead seat portion, and in the following embodiments, the case where it is also applied to the vertical runout will be described together. However, vertical shake need not be included in the essential requirements of the present invention. This is because, if a means for lateral shake inspection is developed, it is relatively easy to change it to vertical shake, and it is not necessary to limit the present invention to the extent that both are essential requirements at the same time. .

〔Example〕

Examples of the present invention will be described below. As shown in FIGS. 1 and 2, the wheel shake inspection device of the present invention comprises a wheel rotation holding unit 10 and a lateral shake measuring unit 20. The wheel shake inspection device may further include a vertical shake measuring unit 40. 1 indicates the wheel to be inspected.

The wheel 1 has a rim 2 and a disc 3, and the rim 2 has rim bead seats 4 and 5 at both ends in the wheel width direction (wheel axis direction). The rim bead seat 4 includes a flange portion 4a extending in the wheel radial direction and a bead seat portion 4b extending in the wheel axial direction. The rim bead seat 5 has a flange portion 5a extending in the wheel radial direction and a bead seat portion 5b extending in the wheel axial direction. Consists of. The bead of the tire is pressed against the rim bead sheets 4 and 5 and adhered to the wheel.

The wheel rotation holding unit 10 may have any structure as long as it can position the wheel 1 and drive it to rotate. For example, the fixed base 11 and the fixed base can be used.
The shaft 12 is rotatably supported by the shaft 11, a wheel mount 13 mounted on the upper end of the shaft 12, and a motor (not shown) for driving the shaft 12 to rotate. Wheel 1
Is set in the wheel mounting base 13 after being positioned in the radial direction using the hub hole 6 and in the rotational direction using the bolt hole 7. By driving the wheel rotation holding unit 10, the wheel 1 is rotated around the axis.

The lateral shake measuring unit 20 includes two lateral shake measuring rollers arranged at the same circumferential position of the wheel 1 and relatively movable in the axial direction of the wheel 1 (same as the rim width direction).
It has 21 and 22. The two lateral shake measurement rollers 21 and 22 are
The arms 23 and 24 are rotatably supported, respectively. The arm 23 is connected to a rack shaft 25 extending in the rim width direction so as to move integrally in the rim width direction.
The rack 24 is coupled to a rack shaft 26 extending in the rim width direction so as to move integrally in the rim width direction. The two rack shafts 25, 26 are arranged in parallel at a distance from each other,
Between them the pinion (gear) of the rotary actuator 27
Is provided. The pinion meshes with the rack of the rack shaft 25 and the rack of the rack shaft 26, and thus the rotary actuator 27 is floatingly supported between the rack shafts 25, 26. The pinion of the rotary actuator 27 is rotationally biased in a rotational direction in which the two lateral shake measuring rollers 21 and 22 are separated from each other. A pinion of the rotary actuator 27 is rotatably supported by an arm 28, and the arm 28 is supported by a support 29 so as to be movable in the rim width direction integrally with the pinion. A dial gauge 30 is provided at a position facing the rim width direction at one end of the rack shaft 25, and a dial gauge 31 is similarly provided at a position facing the rim width direction at one end of the rack shaft 26. Two dial gauges 3
0 and 31 are attached to a rod 32 fixed to a support base.
On the other hand, a lateral runout average value measurement dial gauge 33 is provided at a position facing the arm 28 in the rim width direction. The lateral shake average value measurement dial gauge 33 is supported by a support base 29. The support base 29 of the lateral shake measurement unit 20 can be moved back and forth with respect to the wheel holding and rotating unit 10, and the wheel 1 to be inspected.
It is moved by the cylinder 34 so that its position is adjusted according to the diameter of the cylinder.

The vertical shake measurement unit 40 has two vertical shake measurement rollers 41 and 42 which are radially applied to the bead seat portions 4b and 5b at both ends in the wheel axial direction. Vertical runout measurement rollers 41, 42
Are shafts 43, 44 extending in the wheel radial direction, respectively.
Is rotatably supported at one end of the. Dial gauges 45 and 46 are arranged at the other ends of the shafts 43 and 44, respectively, in the wheel radial direction so as to face each other.
5, 46 are supported by a support base 47. The shafts 43 and 44 are movable in the wheel radial direction and are urged in the wheel 1 direction by springs 52 and 53, and their movements can be measured by dial gauges 45 and 46, respectively. A link 48 extends between the two shafts 43 and 44, and the link 48 is connected to the shafts 43 and 44 by a sliding connection of a pin groove. Link 48, shaft 43,
The shaft 49 is pivotally connected to the center of the shaft 44,
Extend in the same direction as the shafts 43, 44 juxtaposed to each other. A vertical runout average value measurement dial gauge 50 is arranged at the end portion of the shaft 49 opposite to the pivotal side to the link 48 in the wheel radial direction, and the vertical runout average value measurement dial gauge 50 is It is supported by a support base 47. The support base 47 of the vertical vibration measurement unit 40 is movable in the wheel radial direction, and the cylinder 47 is movable in accordance with the diameter of the wheel 1 to be inspected.
The position is adjusted by being driven by 51.

Next, the operation of the present invention will be described. Figure 3 (a),
(B) and (c) schematically show the action of lateral shake detection, and FIGS. 4 (a), (b), and (c) show schematically the action of vertical shake detection.

First, the wheel 1 is set in the wheel rotation holding unit 10 and rotated.

In the lateral shake measurement, the lateral shake measuring rollers 21 and 22 urged in mutually opposite directions are provided on the flange portions 4a and 5a,
The wheels 1 are always in contact with each other in the rim width direction at the same circumferential position, and the lateral shake of the flange portions 4a and 5a is detected at the same time.
The lateral shake of the flange portions 4a and 5a is caused by the lateral shake measuring roller 21,
The movements of the rack shafts 25, 26, which have the same wheel axial movement as that of 22, respectively, are measured by reading with dial gauges 30, 31, respectively. Due to the floating support structure between the rack shafts 25 and 26 of the rotary actuator 27, the pinion of the rotary actuator 27 is always automatically and irrespective of the independent rim widthwise movement of the two lateral shake measuring rollers 21 and 22. Two rollers for lateral shake measurement 21, 22
By taking the intermediate position of, and reading this position by the lateral shake average value measurement dial gauge 33, the average value of the lateral shake of both flange portions 4a, 5a is visually measured without any special calculation. be able to. Since the lateral shake measuring rollers 21 and 22 are urged in directions to be separated from each other by the rotation urging of the pinion, the force of one roller 21 pressing the flange portion 4a and the force of the other roller 22 pressing the flange portion 5a are , The axial forces acting on the entire rim 2 cancel each other out, and no axial force is applied to the disk 3 during the lateral shake measurement, so that the deflection of the disk 3 during the lateral shake measurement is zero. Therefore, the measured values of the dial gauges 30, 31, and 33 have no error due to the bending of the disk 3, and accurate lateral shake average value measurement is performed.

Similarly, in vertical shake measurement, the vertical shake measurement roller 4
1, 42 are always in contact with the bead seats 4, 5 at the same circumferential position of the wheel 1 and in the radial direction of the wheel 1 to detect the vertical runout of the bead seat portions 4b, 5b at the same time. The vertical runout of the bead seats 4b and 5b is caused by the shafts 43 and 44 that move in the same radial direction as the vertical runout measuring rollers 41 and 42, respectively.
Is measured by reading the movements of the dial gauges 45 and 46, respectively. Due to the structure of the link 48, the pivot point between the link 48 and the other shaft 49 is always automatically set regardless of the independent radial movements of the two vertical runout measuring rollers 41 and 42. By taking an intermediate position between the two vertical shake measurement rollers 41 and 42 and reading this position by the vertical shake average value measurement dial gauge 50 through the movement of the shaft 49, without any special calculation. The average value of the vertical runout of both bead seat portions 4b and 5b can be visually measured.

〔The invention's effect〕

 According to the present invention, the following effects can be obtained.

I. Compared to the lateral shake inspection that was performed on the side of the conventional flange portion of the rim, the lateral shake inspection is both time and work load.
Halve.

B. The average value of the lateral runout of the flanges at both ends in the rim width direction is
Easily and accurately calculated without setting special calculation and two inspection jigs.

C. Since the lateral shake measuring rollers are pressed against the flanges on both ends by the urging force generated by the rotational urging force of the pinion,
The axial force applied to the entire rim becomes 0, the wheel axial force is not applied to the disk during lateral shake measurement, and accurate lateral shake measurement is possible without lateral shake measurement error due to bending of the disk.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a wheel shake inspection apparatus according to an embodiment of the present invention, FIG. 2 is a plan view of the apparatus of FIG. 1, and FIGS. 3 (a), (b), and (c) are lateral shakes. It is a schematic diagram of an inspection operation. 4 (a), (b) and (c) are schematic diagrams of the vertical shake inspection operation. 1 …… Wheels 4a, 5a …… Flange part 10 …… Wheel rotation holding unit 20 …… Horizontal shake measurement unit 21,22 …… Roller for lateral shake measurement 25,26 …… Rack shaft 27 …… Rotary actuator 30,31 …… Dial gauge for horizontal shake measurement 33 …… Dial gauge for measuring horizontal shake average value 40 …… Vertical shake measurement unit 41,42 …… Roller for vertical shake measurement 43,44 …… Shaft 45,46 …… Vertical shake measurement Dial gauge 48 …… Link 49 …… Shaft 50 …… Dial gauge for measuring vertical runout average value

Claims (1)

[Claims] 1. A wheel holding and rotating unit that holds and rotates a wheel, and lateral runouts of flange portions at both ends in the rim width direction of the wheel held and rotated by the wheel holding and rotating unit at the same circumferential position of the wheel. A horizontal shake measuring unit for simultaneously measuring and measuring an average value of the horizontal shake of both flange portions, wherein the horizontal shake measuring unit has two horizontal shake measuring rollers arranged at the same circumferential position of the wheel. And two rack shafts each of which performs the same movement in the rim width direction with each of the two lateral shake measuring rollers, and two dial gauges each of which measures the respective axial movements of the two rack shafts. A pinion that is meshed with the two rack shafts and is floatingly supported between the two rack shafts, and that is itself rotationally biased. A rotary actuator in which the rotational urging directions of the pinions are set in directions urging the two rack shafts in opposite directions so as to be separated from each other in the lateral shake measurement roller width directions, and a rotary actuator of the rotary actuator. A wheel runout inspection device comprising a lateral runout average value measurement dial gauge that measures movement in the rim width direction.