JP5282962B2 - Wheel alignment measuring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a wheel of a vehicle which is to be measured from deviating from on a wheel support means, in a wheel alignment measuring device having the wheel support means formed by bridging a belt over a pair of rollers. <P>SOLUTION: This wheel alignment measuring device capable of preventing deviation of a wheel is formed, by providing with/separably from a wheel in a contacting manner; and a deviation prevention means 3, supporting a swing arm 3a pivoting turnably a pressing roller 3c which abuts against a tread surface of a tire of each wheel, on each front part of wheel support parts 2a, 2b for front wheels of the wheel support means 2, and on each rear part of wheel support parts 2c, 2d for rear wheels. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a wheel alignment measuring device used for measuring wheel alignment of a passenger car or other automobiles.

  Conventional wheel alignment measuring devices are generally of a type that rotates by placing tires (wheels) on front and rear rollers. However, this method has a problem that the wheel is different from the actual traveling state on the road surface.

  Therefore, the applicant has previously filed a wheel alignment measuring device in which a belt is stretched between a pair of rollers and an automobile wheel is placed on the belt and the belt is driven by a driving means (patent) Reference 1).

JP 2005-114597 A

  However, in the method of Patent Document 1, when the peripheral speed of the belt is different from the peripheral speed of the tire mounted on the belt, the wheel (automobile) deviates from the belt and moves forward or backward. There was a problem.

  An object of the present invention is to solve such problems and to provide a wheel alignment measuring device capable of always reliably measuring wheel alignment without causing the wheel to deviate from the belt.

  In order to achieve the above object, the present invention has a swing arm that pivotally supports a pressure roller that abuts against the tread surface of each tire in front of or behind each wheel support means included in the wheel alignment measuring device. Wheel disengagement prevention means is provided so as to be able to contact and separate from the wheel.

  According to the present invention, even when the peripheral speed of the belt and the peripheral speed of the tire mounted on the belt are different, the wheel alignment does not deviate from the belt and the wheel alignment measurement can always be performed reliably. The apparatus can be provided.

It is a top view which shows system arrangement | positioning of the wheel alignment measuring apparatus of Example 1 of this invention. It is a side view of a part of said wheel alignment measuring device and a wheel support means. FIG. 3 is a cross-sectional view taken along line XX in FIG. 2. It is a rear view of the wheel alignment measuring device. It is a top view which shows a part of said wheel alignment measuring apparatus and the structure of the deviation prevention means of a wheel. FIG. 6 is a cross-sectional view taken along line YY in FIG. 5. It is a block diagram of the operation control means of the deviation prevention means.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing the arrangement of each system in the wheel alignment measuring apparatus 1 of the present embodiment.

  Arrow A indicates the approach direction of the vehicle under test for measuring the wheel alignment, and the wheel support means 2 supports the left and right front wheels and rear wheels of the vehicle under measurement.

  That is, the wheel support means 2 includes a left front wheel support 2a, a right front wheel support 2b, a left rear wheel support 2c, and a right rear wheel support 2d.

  FIG. 2 is a side view of the wheel support means 2, and FIG. 3 is a cross-sectional view taken along line XX of the wheel support belt.

  The wheel support means 2 comprises a roller 21 that is pivotally supported in the front and rear direction, and a belt 22 that is stretched between the rollers 21, and one of the rollers 21 is connected to a motor that is a rotational drive source via a speed reducer. It is connected.

  A plurality of circumferential grooves 21 a are formed on the outer circumferential surface of the front and rear rollers 21 along the circumferential direction of the roller 21, and the inner circumferential surface of the belt 22 is moved in the moving direction of the belt 22. Plural ridges 22a are provided so that the ridges 22a engage with the circumferential grooves 21a.

  FIG. 4 is a view of a pair of left and right base portions 5 and 5 corresponding to the rear wheel of the vehicle to be measured as viewed from the rear, and the base portion 5 includes a lower base portion 5a and an upper base plate portion 5b.

  The wheel support portions 2a, 2b, 2c, and 2d are installed on the base portion 5 installed in a pit P provided below the floor of the work place as shown in FIG.

  F represents a floor surface, and the upper surface of the wheel support means 2 is arranged to be slightly lower than the floor surface F.

  The base plate portion 5b is formed such that the wheel support portion 2a or 2b or 2c or 2d and the wheel deviation prevention means 3 are installed on the upper surface so as to be movable in the front-rear direction on the base portion 5a.

  5c is a movement drive part for moving the base plate part 5b in the front-rear direction on the base part 5a.

  Incidentally, 5d is a measuring means for measuring the wheel alignment of the vehicle under measurement, which is a non-contact type detecting means for detecting the outline of the side surface of the wheel using light.

  Next, the structure of the wheel departure prevention means 3 will be described.

  FIG. 5 is a plan view of a part of the wheel deviation prevention means 3 and the left front wheel portion. The wheel deviation prevention means 3 is pivotally mounted on the base plate portion 5b. An arm 3a, a rod-shaped pressing shaft 3b protruding in a direction perpendicular to the swing arm 3a, and a pressing roller pivotally supported by the pressing shaft 3b via a rolling bearing (not shown) 3c.

  By the swing arm 3a, the pressing roller 3c can turn in an angle range of about 90 degrees from the position of the solid line to the position of 3c ′ shown by the phantom line.

  Incidentally, 3a1 is a rotation axis of the swing arm 3a.

  The wheel deviating prevention means 3 for each front wheel can be brought into contact with the tread surface of the tire from the front of the tire for the front wheel, and can be brought into contact with the tread surface of the tire from the rear of the tire for the rear wheel. 2a, 2b, 2c and 2d.

  The structure of the drive part of the departure prevention means 3 is shown in FIG.

  FIG. 6 is a cross-sectional view taken along line YY in FIG. 5. A cam 3d provided eccentrically with respect to the axis of the rotary shaft 3a1 at a lower portion of the rotary shaft 3a1, and a pin joint 3e connected to the cam 3d. And a hydraulic cylinder 3f to be connected. By operating the hydraulic cylinder 3f, the rotating shaft 3a1 can be rotated to turn the swing arm 3a, and the pressing roller 3c can be pressed against the tread surface of the tire with a predetermined force.

  The rotating shaft 3a1 is installed on the base plate part 5b via a mounting base 5b1, and the base plate part 5b is formed so as to be movable on the base part 5a. The movement is controlled along the side edge of the belt 22 of the support portion 2a or 2b or 2c or 2d.

  The wheel alignment measuring apparatus 1 shown in FIG. 1 moves each wheel by pressing it from the side so that the wheel of the vehicle under test comes to the center of each wheel support 2a, 2b, 2c and 2d. A pressing means 4 is provided.

  The pressing means 4 is installed on the base plate part 5b adjacent to the outer sides of the wheel support parts 2a, 2b, 2c and 2d.

  In FIG. 5, reference numeral 4a denotes a push roller of the pressing means 4.

  FIG. 7 shows a block diagram of the operation control means of the departure prevention means 3.

  In FIG. 7, reference numeral 6 denotes a drive control unit. The drive control unit 6 receives an operation signal from the first operation unit 7a for adjusting the turning angle of the swing arm 3a, and receives a first signal corresponding to the operation signal. 1 control signal is output to the electrohydraulic converter 8, and the drive controller 6 inputs an operation signal from the second operation unit 7 b that adjusts the movement of the departure prevention means 3 and responds to the operation signal. The second control signal is output to the movement drive unit 5c of the mount 5b1 of the swing arm 3a.

  Next, the operation of the wheel alignment measuring apparatus 1 according to the first embodiment will be described.

  The vehicle under measurement enters the wheel alignment measuring device 1 in the direction of the arrow in FIG. 1, and the front, rear, left, and right wheels of the vehicle under measurement are placed on the wheel support portions 2a, 2b, 2c, and 2d.

  At this time, when the position of each wheel is shifted to the left and right on each wheel support portion 2a, 2b, 2c or 2d, the wheel is pressed from the side by the pressing means 4, and each wheel is moved to the belt. 22 is moved to a preferred position for alignment measurement.

  When the vehicle to be measured enters, the first operating portion 7a is operated, and the hydraulic cylinder 3f is operated via the electrohydraulic converting portion 8 by the first control signal from the drive control portion 6 to turn the swing arm 3a. The pressing roller 3c of the pressing shaft 3b is set to the lateral position of each wheel support portion 2a, 2b, 2c, 2d indicated by the imaginary line in FIG. 3 so as not to prevent the entry of each wheel.

  Next, the second operation unit 7b is operated according to the distance between the front and rear wheels of the vehicle type of the vehicle to be measured, and the movement drive unit 5c is operated by the second control signal from the drive control unit 6 to move the base plate unit 5b. Move slightly and adjust the position of the swing arm 3a.

  Thereafter, the first operating portion 7a is operated, the hydraulic cylinder 3f is operated via the electrohydraulic converting portion 8 by the first control signal from the drive control portion 6, and the swing arms 3a are turned, and the pressing shafts 3b are turned. The pressing roller 3c is brought into contact with the tire tread surface of each wheel at the position indicated by the solid line in FIG.

  Thus, if the wheel alignment is measured while the pressing roller 3c is brought into contact with the tires before and after the vehicle to be measured, the circumferential speed of the belt 22 of the wheel support means 2 and the circumferential speed of the tire riding on the belt 22 are measured. Can be measured safely without deviating from the wheel support means 2.

  Further, during this measurement, even if there is a possibility that the predetermined contact position with the roller 21 may be shifted while the belt 22 that is in press contact is rotated by the rotation of each wheel set at a predetermined toe angle or the like, as described above. Since the circumferential groove 21a and the protrusion 22a are engaged with each other, the belt 22 is not displaced during rotation.

  Contrary to this embodiment, a circumferential ridge may be formed on the roller 21 and a groove for engaging the circumferential ridge may be formed on the belt 22.

  The present invention is used for wheel alignment measurement in a vehicle maintenance factory or the like.

DESCRIPTION OF SYMBOLS 1 Wheel alignment measuring device 2, 2a, 2b, 2c, 2d Wheel support means 3 Deviation prevention means 3a Swing arm 3a1 Turning support shaft (rotary shaft)
3b Press shaft 3c Press roller 5d Wheel outline detection means 6 Operation control means 21 Roller 21a Circumferential groove 22 Belt 22a Projection

Claims (6)

  Wheel support means for mounting and rotating each wheel of the vehicle to be measured, and detection means for detecting an outline of the side surface of the wheel provided on the side of each wheel support means, the wheel support means In a wheel alignment measuring device formed so as to hang a belt on a pair of rollers and to place the wheel on the belt, and to drive the belt by a driving means. Further, wheel alignment measurement, characterized in that a wheel deviation prevention means having a swing arm pivotally supported by a pressing roller in contact with a tread surface of the tire of each wheel is provided so as to be able to contact and separate from the wheel. apparatus.   2. The wheel alignment measuring apparatus according to claim 1, wherein the wheel deviation preventing means is provided at a front portion of the front wheel support means and a rear portion of the rear wheel support means.   The swing arm has a pressing shaft that pivotally supports the pressing roller, and is parallel to the belt on the side of the belt of the wheel support means from a contact position where the pressing roller contacts the tread surface. The wheel alignment measuring device according to claim 1 or 2, wherein the wheel alignment measuring device is formed so as to be capable of turning to a retreat position and capable of being pressed against the tread surface of the tire with a predetermined force.   The wheel alignment measuring device according to claim 3, wherein a rotation axis of the swing arm is provided on a side of the belt so as to be movable along a side edge of the belt.   The wheel alignment measuring apparatus according to claim 4, wherein operation control means for controlling turning and movement of the swing arm is connected to the swing arm.   The wheel support means has a plurality of circumferential grooves or circumferential ridges along the circumferential direction of the pair of rollers on the outer circumferential surface of the pair of front and rear rollers, and an inner circumference of the belt that is passed over the rollers. The wheel alignment measuring device according to claim 1, wherein the surface has a protrusion that can engage with the circumferential groove or a groove that engages with the circumferential protrusion.

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