JP4926520B2 - Side slip measuring device - Google Patents

Description

  The present invention relates to a side slip measuring device that is installed in a wheel alignment measuring facility of an automobile and detects a movement amount of the tread by passing a measured vehicle on a pair of left and right treads as a side slip value of the vehicle. .

  An example of a conventional side slip measuring device installed in a wheel alignment measuring facility for measuring wheel alignment such as a camber angle, a toe angle and a caster angle of an automobile is shown in FIGS. FIGS. 3A and 3B show a state of a zero point (origin) position without side slip of the vehicle, FIG. 3A is a plan view, and FIG. 3B is an enlarged perspective view of a Y portion in FIG. FIG. 4 shows a state where the right tread has moved to the right side due to a side slip of the vehicle, (A) is a plan layout view, and (B) is an enlarged perspective view of a W portion in (A).

3 to 4, 1 is a left tread board, 2 is a right tread board, 20 is a left tread arm projecting inwardly from the left tread board 1 (center side of the apparatus), and 21 is inward from the right tread board 2 (of the apparatus). This is the right tread arm projecting from the center. A potentiometer 3a and a potentiometer 3b having the same specifications are connected to a support part 201 projecting in a right angle direction from the left tread arm 20 and a support part 211 projecting in a right angle direction from the right tread arm 21, respectively. The displacement (movement amount) of the left tread board 1 and the right tread board 2 is detected by the potentiometer 3a and the potentiometer 3b, respectively.

Reference numeral 10a denotes a left tread plate zero-point restoring device having a link mechanism 22a for restoring the potentiometer 3a to the zero point after the displacement (movement) of the left tread board 1 and a return spring 6a, and 10b denotes a displacement of the right tread board 2 ( It is a right tread plate zero point restoring device provided with a link mechanism 22b for restoring the potentiometer 3b to the zero point after movement) and a return spring 6b.
As shown in FIG. 3A, the left tread plate zero point restoring device 10a and the right tread plate zero point restoring device 10b include the link mechanisms 22a and 22b and the return springs 6a and 6b having the same specifications. It is installed symmetrically with respect to the center between the left treads 2.

In such a conventional side slip measuring apparatus, as shown in FIGS. 4A and 4B, the vehicle to be measured is passed over the left tread board 1 and the right tread board 2, for example, the right tread board 2 is an S arrow. Thus, when sliding to the right in the figure, the displacement, that is, the amount of movement of the right tread 2 is measured by the potentiometer 3b for the right tread 2. At this time, the displacement, that is, the movement amount of the left tread board 1 is also measured by the potentiometer 3a for the left tread board 1, and the displacement measurement value of the potentiometer 3b for the right tread board 2 and the displacement measurement value of the potentiometer 3a for the left tread board 1 are obtained. In total, the side of the measured vehicle is used as the detected value of the side slip value.
After the vehicle to be measured passes over the left tread 1 and the right tread 2, the right tread 2 is set to the zero point (the origin) via the link mechanism 22b by the spring force of the return spring 6b of the right tread zero restoring device 10b. ) And the left tread board 1 is pulled back to the zero point (origin) via the link mechanism 22a by the spring force of the return spring 6a of the left tread board zero point restoring device 10a.

Patent Document 1 (Japanese Patent Laid-Open No. 5-215650) discloses a side slip measuring device that detects a movement amount of a tread by passing a measured vehicle on a pair of left and right treads as a side slip value of the vehicle. Technology).
In such a technique, the movement amount of the tread plate caused by passing the vehicle to be measured on the pair of left and right treads is detected by a movement amount detector connected to the left and right tread plates, and from the projector to the measured vehicle. The light received by the receiver is received by a light receiver to detect the time when the vehicle enters and leaves the tread, and the amount of movement of the tread when the vehicle enters and the movement of the tread when it exits An amount is detected, and the detection value is compared with a reference value to determine whether the side slip value is acceptable.

JP-A-5-215650

  3-4, the potentiometer 3a and the zero point restoring device 10a for the left tread board 1, and the potentiometer 3b and the zero point restoring device 10b for the right tread plate 2 are separately provided, and the left tread plate 1 is measured by the potentiometer 3a for the left tread 1, and the displacement (move) of the right tread 2 is measured by the potentiometer 3b for the right tread 2. The displacement of the potentiometer 3a for the left tread 1 is measured. Since the measured value and the displacement measured value of the potentiometer 3b for the right tread 2 are added to obtain the detected value of the side slip value of the vehicle under measurement, the internal error of the potentiometer 3a or 3b, the potentiometer 3a or 3b The error caused by the backlash of the link connecting the left tread 1 or the right tread 2 is the sum of the left tread 1 side and the right tread 2 side. Becomes to be superposed on the detection value of-up value, the detection accuracy of sideslip value decreases.

  In this prior art, the potentiometers 3a and 3b, the link between the potentiometers 3a and 3b and the left tread board 1 and the right tread board 2, and the zero point restoring devices 10a and 10b are provided for the left tread board 1 and the right tread board 2 respectively. Therefore, the number of parts of the side slip measuring device is increased, and the assembly adjustment of the device must be performed separately on the left tread board 1 side and the right tread board 2 side. Assembly cost increases.

  In the technique disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 5-215650), a movement amount detector is connected to the left and right treads, and the movement amount of the left and right treads is detected by one movement amount detector. Although it is not necessary to provide two sets of potentiometers and links between the potentiometers and the left and right footboards as in the prior art shown in FIGS. There is no disclosure about the installation of the point restoration device.

  Therefore, in view of the problems of the prior art, the present invention improves the detection accuracy of the detected values of the side slip values of the left and right treads by the displacement detector, and includes the displacement detector and the zero point restoration device of the displacement detector. It is an object of the present invention to provide a side slip measuring device that is easy to adjust, has a simple and compact structure, has a small number of parts, and can be realized at low cost.

The present invention achieves such an object, in a side slip measuring device that detects a movement amount of the tread by passing a measured vehicle over a pair of left and right treads as a side slip value of the vehicle.
A left measuring arm and a right measuring arm projecting inward from the left and right treads are connected at an intermediate position between the left and right treads, and the left measuring arm or the right measuring arm is connected to the left measuring arm or the right measuring arm. One displacement detection device for detecting the total displacement of the left tread plate and the right tread plate as the amount of movement is attached, and the left tread plate or the right tread plate after the displacement is attached to the connecting portion between the left measurement arm and the right measurement arm. A left and right tread plate zero point restoring device provided with a link mechanism for restoring the displacement detecting device to the zero point and a return spring is provided, and the one displacement detecting device is constituted by a potentiometer, and the left measuring arm or the right The potentiometer is fixed to one upper surface of the measurement arm, and a step portion is formed by sinking the end of the measurement arm on the side where the potentiometer is fixed downward. The left tread plate link mechanism and return spring of the left and right tread plate zero point restoring device and the right tread plate link mechanism and return spring are vertically stacked on the end of the stepped portion, and the detection end of the potentiometer The left and right tread plate zero point restoring devices are connected to the other of the measurement arms through the upper side of the link mechanism.

According to the present invention, the left measurement arm and the right measurement arm project from the left tread plate and the right tread plate, respectively, and are connected to each other at an intermediate position so that either the left measurement arm or the right measurement arm A displacement detection device for detecting the total displacement of the right tread as a movement amount is attached, and the left measurement arm and the right measurement arm are connected at an intermediate position between the left tread and the right tread, and the left is connected to the connecting portion. Since the left and right tread plate zero point restoration device is provided with a link mechanism that restores the zero point of the displacement detection device after displacement of the tread plate or right tread plate and a return spring, it projects inward from the left tread plate and the right tread plate, respectively. The total displacement of the left and right treads can be detected as the amount of movement by one displacement detection device attached to either the left measurement arm or the right measurement arm that is installed and connected at an intermediate position. As shown in FIGS. 3 to 4, the side slip value is detected by adding the displacement measurement value by the left tread potentiometer (displacement detection device) and the displacement measurement value by the right tread potentiometer. Such accumulation of errors is eliminated, and the detection accuracy of the side slip value is improved.

Further, a left measuring arm and a right measuring arm are provided inwardly projecting from the left tread plate and the right tread plate, and are connected at an intermediate position to detect the total displacement of the left tread plate and the right tread plate on one of the arms. is attached a number varying level detection device ing from potentiometer of links to the connecting portion of the left measurement arm and right measuring arm, to restore to the zero point of the displacement detecting device after the displacement of the left tread plate or right treadle The left and right tread plate zero point restoration device equipped with a mechanism and return spring is provided, so the left or right measurement arm with the displacement detection device can be used as part of the left and right tread plate zero point restoration device to detect displacement The mounting structure of the device and the structure of the left and right footboard zero point restoring device are simple and compact.

As described above, the left measurement arm and the right measurement arm are respectively projected from the left tread board and the right tread board and connected at an intermediate position to detect the total displacement of the left tread board and the right tread board on one of the arms. Left and right tread plate zero point restoration device that has a displacement mechanism and a link mechanism that uses the left measurement arm or a part of the right measurement arm and a return spring at the connection between the left measurement arm and the right measurement arm The above-described adjustment effect of the side slip value can be improved with a low-cost apparatus that is easy to adjust, has a simple and compact structure, and has a small number of parts.

Further, the one displacement detection device is constituted by a potentiometer, and the potentiometer is fixed to one upper surface of the left measurement arm or the right measurement arm, and the end of the measurement arm on the side where the potentiometer is fixed is directed downward. A stepped portion is formed by being depressed, and the left and right tread link mechanism and return spring, right tread link mechanism and return spring of the left and right tread plate zero point restoration device are arranged in a vertically stacked manner at the end of the stepped portion. and, since constituting the detecting end of the potentiometer to be coupled to the other of the measuring arm through the upper link mechanism of the left and right step boards zero restoration device, the end of the measuring arm on the side of the potentiometer is secured The left tread plate link mechanism and the return spring and right tread plate link machine of the left and right tread plate zero point restoration device at the end of the stepped portion depressed downward And the return spring and the return spring are arranged in a vertically stacked manner, and the left and right tread plate zero point restoring device is connected to the other of the measurement arms through the upper space of the left and right tread plate zero point restoring device. In addition, the arrangement of the potentiometer becomes compact, so that the installation space can be reduced and the degree of freedom in designing the side slip measuring device is increased.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

  FIG. 1 shows a state of a zero point (origin) position where there is no side slip of a vehicle in a vehicle side slip measuring apparatus according to an embodiment of the present invention, (A) is a plan layout view, and (B) is in (A). It is a Z section enlarged perspective view. 2 shows a state in which the right tread has moved to the right side due to a side slip of the vehicle in the above embodiment, (A) is a plan layout view, and (B) is an enlarged perspective view of a V portion in (A).

1 and 2, reference numeral 1 denotes a left tread board through which the left wheel of the vehicle passes, and 2 denotes a right tread board through which the right wheel of the vehicle passes. From the left tread 1 and the right tread 2, a plate-like left measuring arm 4 and right measuring arm 5 having a smooth upper surface project from the inner left tread 1 and the right tread 2.
The left measurement arm 4 and the right measurement arm 5 are connected at an intermediate position between the left tread plate 1 and the right tread plate 2, and a left and right tread plate zero point restoring device 10 described later is installed in the connecting portion 100, and the left measurement arm A single potentiometer (displacement detection device) 3 for detecting the total displacement of the left tread plate 1 and right tread plate 2 as the amount of movement of the left tread plate 1 and right tread plate 2 is fixed on the upper surface of the arm 4 as a fixing mechanism. It is fixed by 3z.

  The left and right tread plate zero point restoring device 10 includes a left tread plate link mechanism 41 connected to a tip of a step portion 4a formed by being depressed downward at an end portion of the left measurement arm 4, and the left tread plate link mechanism 41. And a stationary part, the vehicle to be measured passes over the left tread 1 and then the left measuring arm 4 is pulled back to the zero point (origin) via the left tread link mechanism 41. A left tread plate zero point restoring device comprising a spring 7, a right tread plate link mechanism 52 connected to the tip of the right measurement arm 5, and a vehicle to be measured installed between the right tread link mechanism 52 and a stationary part. And a right tread plate zero point restoring device comprising a right tread plate return spring 6 that pulls the right measuring arm 5 back to a zero point (origin) via the right tread plate link mechanism 52 after the right tread plate 2 is passed. 1 (B As shown in FIG. 2B, the left tread plate link mechanism 41 and the left tread plate return spring 7 constituting the left tread plate zero point restoring device and the right tread plate link mechanism constituting the right tread plate zero point restoring device. 52 and the right tread return spring 6 are vertically stacked, and the detection end 31 of the potentiometer 3 is passed through the upper side of the link mechanisms 41 and 52 of the left and right tread zero restoring device 10 to the right measuring arm. 5 arm portions 51 are connected.

If comprised in this way, the link mechanism 41 for the left footboard of the left and right footboard zero point restoring device 10 at the end of the stepped portion 4a in which the end of the left measuring arm 4 on the side to which the potentiometer 3 is fixed is depressed downward. In addition, the left tread return spring 7, the right tread link mechanism 52, and the right tread return spring 6 are arranged in a vertically superposed manner, and the detection end 31 of the potentiometer 3 is connected to the left and right tread zero restoration device 10. By connecting to the right measuring arm 5 through the upper space, the arrangement of the left and right tread plate zero point restoring device 10 and the potentiometer 3 can be made compact, and the installation space can be reduced, and the design freedom of the side slip measuring device can be reduced. Can be increased.
The potentiometer 3 is attached to the upper surface of the right measurement arm 5 to form the stepped portion 4a as described above, and the left measurement arm 4 has the same configuration as the right measurement arm 5 in FIGS. You may comprise.

In this embodiment, as shown in FIGS. 2A and 2B, the vehicle to be measured is passed over the left tread 1 and the right tread 2, and for example, the right tread 2 is like a T arrow (right measurement). When the arm 5 slides to the right in the figure (as indicated by the arrow T1), the total displacement (movement amount) of the left tread board 1 and the right tread board 2 is detected as the movement amount by one potentiometer 3, and this is detected. The detected side slip value is used.
After the vehicle to be measured has passed over the left tread 1 and the right tread 2, the right tread through the right tread link mechanism 52 by the spring force of the right tread return spring 6 of the left and right tread zero restoring device 10. 2 is returned to the zero point (origin), and the left tread plate 1 is pulled back to the zero point (origin) via the left tread plate link mechanism 41 by the spring force of the left tread plate return spring 7.

  According to this embodiment, the left measuring arm 4 and the right measuring arm 5 project from the left tread 1 and the right tread 2 inwardly, and the left tread on either the left measuring arm 4 or the right measuring arm 5. A potentiometer (displacement detection device) 3 for detecting the total displacement of 1 and the right tread 2 as a movement amount is attached, and the left measuring arm 4 and the right measuring arm 5 are placed between the left tread 1 and the right tread 2. Left and right treads that are connected in position and have link mechanisms 41 and 52 and return springs 7 and 6 for restoring the potentiometer 3 to the zero point after the displacement of the left tread 1 or the right tread 2 to the connecting part 100. Since the zero point restoration device 10 is provided, one piece attached to either the left measurement arm 4 or the right measurement arm 5 that protrudes inward from the left tread board 1 and the right tread board 2 and is connected at an intermediate position. The total displacement of the left tread board 1 and the right tread board 2 can be detected as the movement amount by the potentiometer 3, and the displacement measured value and the right by the left tread potentiometer (displacement detection device) as shown in FIGS. Accumulation of errors, such as the detection value of the side slip value by adding the displacement measurement value by the tread potentiometer, is eliminated, and the detection accuracy of the side slip value is improved.

  Further, a left measuring arm 4 and a right measuring arm 5 project from the left tread 1 and right tread 2, respectively, and are connected at an intermediate position, and the left tread 1 and right tread 2 are connected to one of the arms 4 and 5, respectively. A single potentiometer (displacement detection device) 3 for detecting the total sum of the displacements of the left tread plate 1 and the right tread plate 2 is attached to the connecting portion 100 between the left measuring arm 4 and the right measuring arm 5. Since the left and right tread plate zero point restoring device 10 provided with the link mechanisms 41 and 52 and the return springs 7 and 6 for restoring the zero point to the zero point is provided, the left measuring arm 4 or the right measuring arm 5 to which the potentiometer 3 is assembled. Can also be used as a part of the left and right tread plate zero point restoring device 10, and the attachment structure of the potentiometer 3 and the structure of the left and right tread plate zero point restoring device 10 become simple and compact.

  As described above, the left measurement arm 4 and the right measurement arm 5 project from the left tread 1 and the right tread 2, respectively, and are connected at an intermediate position, and the left tread 1 and the right tread 2 are connected to either one of the arms 4 and 5. A link mechanism 41 that attaches one potentiometer 3 that detects the total displacement of the left measurement arm 4 and a part of the left measurement arm 4 or the right measurement arm 5 to the connecting portion 100 between the left measurement arm 4 and the right measurement arm 5. , 52 and return springs 7 and 6 are provided with a left and right tread plate zero point restoring device 10 having a simple and compact structure with a low number of parts and a low cost. An effect of improving detection accuracy can be obtained.

  According to the present invention, the detection accuracy of the detected value of the side slip value of the left and right treads by the displacement detection device is improved, and the displacement detection device and the zero point restoration device of the displacement detection device are configured with a simple and compact structure. It is possible to provide a side slip measuring apparatus that has a small number of points and can be realized at low cost.

In the vehicle side slip measuring device according to the embodiment of the present invention, the state of the zero point (origin) position without the side slip of the vehicle is shown, (A) is a plan layout, and (B) is an enlarged Z portion in (A). It is a perspective view. The state which the right footboard moved to the right side by the side slip of the vehicle in the said Example is shown, (A) is a plane arrangement | positioning figure, (B) is the V section enlarged perspective view in (A). The state of the zero point (origin) position where there is no side slip in the side slip measuring device for a vehicle according to the prior art is shown, (A) is a plan layout view, and (B) is an enlarged perspective view of the Y part in (A). In the said prior art, the state which the right footboard moved to the right side by the side slip of a vehicle is shown, (A) is a plane arrangement | positioning figure, (B) is the W section enlarged perspective view in (A).

Explanation of symbols

1 Left tread 2 Right tread 3 Potentiometer (displacement detector)
4 left measurement arm 5 right measurement arm 6 right tread return spring 7 left tread return spring 10 left and right tread zero point restoring device 41 left tread link mechanism 52 left tread link mechanism 100 connecting portion

Claims (1)

In the side slip measuring device that detects the amount of movement of the tread by passing the measured vehicle over a pair of left and right treads as a side slip value of the vehicle,
A left measuring arm and a right measuring arm projecting inward from the left and right treads are connected at an intermediate position between the left and right treads, and the left measuring arm or the right measuring arm is connected to the left measuring arm or the right measuring arm. One displacement detection device for detecting the total displacement of the left tread plate and the right tread plate as the amount of movement is attached, and the left tread plate or the right tread plate after the displacement is attached to the connecting portion between the left measurement arm and the right measurement arm. The left and right tread plate zero point restoration device is provided with a link mechanism that restores the zero point of the displacement detection device and a return spring,
Further, the one displacement detection device is constituted by a potentiometer, and the potentiometer is fixed to one upper surface of the left measurement arm or the right measurement arm, and the end of the measurement arm on the side to which the potentiometer is fixed is lowered. A stepped portion is formed by sinking into the left and right, and the left tread link mechanism and return spring, the right tread link mechanism and the return spring of the left and right tread plate zero point restoring device are vertically stacked at the end of the step portion. The side slip measuring device is arranged and connected to the other end of the measuring arm through the upper side of the link mechanism of the left and right tread plate zero point restoring device.

Images