JP3112721U - Vehicle test equipment - Google Patents

Abstract

A vehicle test apparatus capable of accurately and reliably measuring braking forces of left and right wheels constituting a vehicle.
SOLUTION: A pair of front and rear test rollers 3 supported on the left and right upper surfaces of an apparatus main body 2 constituting a vehicle test apparatus 1 are integrally rotated by a driving force of a driving apparatus 4. When a braking force from the vehicle side acts on the test roller 3 during the braking test, a braking force (for example, twist or distortion) generated in the small-diameter shaft portion of the detection shaft 15 connecting the rear test rollers 3 and 3 is obtained. The braking force detectors 6a and 6a constituting the braking force detector 6 are electrically detected, and a detection signal output from the braking force detector 6a is processed by a detection information processing device 26 built in the pointing device 23. The left and right tires A are displayed and recorded as braking forces.
[Selection] Figure 4

Description

  The present invention relates to a composite vehicle testing apparatus used when testing either one or both of braking force (brake) and speed (speed), for example.

  Conventionally, as a test apparatus used in the above-described test, for example, after placing the left and right wheels of a vehicle between a pair of front and rear rollers supported on the left and right upper surfaces of the carriage, a pair of front and rear rollers are provided on the carriage. Rotate with driving force. When the braking force from the vehicle side acts on the roller, the distortion generated in the roller is mechanically amplified and detected independently by a distortion detector (for example, a load cell) connected to the end of the roller. In addition, the lifter plate provided between the pair of front and rear rollers is separated by a lift cylinder into a lowered position where the vehicle wheel can be placed between the pair of front and rear test rollers and a raised position where the vehicle wheel can escape from the pair of front and rear test rollers. There is a vehicle braking test apparatus of Patent Document 1 that moves up and down.

Japanese Patent Laid-Open No. 5-126684.

  However, since the above-described vehicle braking test apparatus mechanically amplifies and detects the distortion generated in the left and right rollers during the braking test, it is difficult to accurately detect the distortion generated in the roller itself. The accuracy is low. In addition, since the distance between the strain detectors connected to the left and right rollers is wide, the detection conditions by the left and right strain detectors are different, and the condition difference is large, so the braking force of the left and right wheels cannot be tested accurately and reliably.

  In view of the above problems, the present invention accurately and reliably detects the braking force of the left and right wheels by electrically detecting the braking force generated in the small-diameter shaft portion of the detection shaft connecting the left and right test rollers by the braking force detection means. An object of the present invention is to provide a vehicle test apparatus capable of measuring.

  In the vehicle testing apparatus according to the first aspect of the present invention, the left and right wheels of the vehicle are placed between a pair of front and rear test rollers that are supported on the left and right upper surfaces of the apparatus main body, and then the test rollers are arranged at a substantially central portion of the apparatus main body. A vehicle testing apparatus for testing by rotating with a driving force of a driving means built in the vehicle, wherein the braking force detecting means for detecting a braking force applied to the test roller from the vehicle side is connected to the left and right test rollers. The vehicle test apparatus is provided with a braking force determination unit that is provided on a small-diameter shaft portion formed on the detection shaft and that determines the braking force of the left and right wheels based on detection information output from the braking force detection unit. Features.

  The above-described vehicle is configured by, for example, an automobile, a motorcycle, a truck, a bus, and the like, and the vehicle wheel is configured by, for example, a rubber tire, a metal, a single piece of wood, a composite wheel, or the like. Further, the driving means includes, for example, a driving device and a motor, a speed reducer, a sprocket, a chain, and the like. Further, the braking force detection means includes, for example, a torsion torque detection device that detects torsion that occurs in the test roller when braking force from the vehicle side acts on the test roller, a distortion detection device that detects distortion that occurs in the test roller, An optical detection device, an overcurrent detection device, a contact detection device, and the like are included. The braking force determination device includes, for example, a personal computer, a host computer, a determination control device including a CPU and a ROM, a RAM, a detection information processing device built in the computer determination control device, and the like.

  That is, after the left and right wheels of the vehicle are placed between a pair of front and rear test rollers that are supported on the left and right upper surfaces of the apparatus main body, a plurality of (four) test rollers are rotated by the driving force of the driving means built in the apparatus main body. . In the braking test, when the braking force from the automobile side acts on the test roller, for example, torsion or distortion significantly occurs in the small diameter shaft portion of the detection shaft connecting the left and right test rollers. If the generated torsion, distortion or the like is electrically detected by the braking force detection means, the braking force of the vehicle can be determined by the braking force determination means based on the detection information output from the braking force detection means.

  According to a second aspect of the present invention, there is provided a vehicle test apparatus according to the first aspect, wherein the braking force detection means is formed at both ends of the detection shaft substantially corresponding to the left and right test rollers. The left and right small-diameter shaft portions are provided respectively. That is, it is possible to detect the braking force substantially corresponding to the left and right wheels.

  A vehicle testing apparatus according to a third aspect of the present invention is provided with speed detecting means for detecting the rotation speed of the test roller at the end of the test roller in combination with the configuration according to the first or second aspect. It is characterized by that. That is, in addition to the detection of the braking force, the rotational speed of the test roller corresponding to the vehicle speedometer can be detected.

  A vehicle test apparatus according to a fourth aspect of the present invention is combined with the structure according to any one of the first to third aspects, and includes driving means built in a substantially central portion of the apparatus main body, One decelerating means for decelerating the driving force output from the driving means is provided between a substantially central portion of the detection shafts connecting the test rollers. That is, the driving force (rotational force) output from the driving unit can be decelerated by one deceleration unit.

  A vehicle test apparatus according to a fifth aspect of the present invention includes a driving force output from the driving means at a substantially central portion of the detection shaft in combination with the configuration according to any one of the first to fourth aspects. One clutch means is provided to cut off the above and make the test roller freely rotatable. That is, since the detection shaft that connects the left and right test rollers is rotated by the driving force of the driving means built in the substantially central portion of the apparatus main body, the driving force (rotational force) output from the driving means is set to one clutch. It can be interrupted by means or transmitted to the detection shaft.

  According to this device, during the test, when the braking force from the vehicle side acts on the test roller, the braking force generated in the small diameter shaft portion of the detection shaft connecting the left and right test rollers is detected by the braking force detection means. Based on the detection information, the braking force determining means determines the braking force of the left and right wheels, so that the detection accuracy is higher than the method of mechanically amplifying and detecting the distortion generated in the left and right rollers as in the conventional example. Because the braking force is detected at the approximate middle part of the left and right test rollers, the conditions at the time of detection are stable, accurate test results can be obtained roughly corresponding to the left and right wheels, and the braking force of the left and right wheels can be accurately determined. And it can measure reliably. In addition to the detection of the braking force, the rotational speed of the test roller corresponding to the vehicle speedometer can be detected and measured by the speed detection means.

  The purpose of this device is to accurately and reliably measure the braking force of the left and right wheels. The braking force generated in the small diameter shaft portion of the detection shaft connecting the left and right test rollers is electrically detected by the braking force detection means. Achieved by detecting.

An embodiment of the present invention will be described in detail with reference to the drawings.
The drawings show a composite type vehicle test apparatus used for a braking test and a speed test of an automobile which is an example of a vehicle. In FIG. 1, FIG. 2 and FIG. A pair of front and rear test rollers 3 on which left and right tires A, A constituting an automobile (not shown) such as a car or a large car are supported are attached to openings 2a opened on the left and right upper surfaces of the apparatus body 2, and left and right upper surfaces A driving device 4 that rotates the pair of front and rear test rollers 3 that are supported on the vehicle, an elevating device 5 that facilitates entry and exit of the automobile, a braking force detection device 6 that detects braking force from the automobile side, A speed detection device 7 for detecting the rotational speed of the test roller 3 corresponding to the speed of the speedometer is built in substantially the center of the apparatus main body 2.

  The above-described test roller 3 is composed of a vehicle test roller disclosed in Utility Model Registration No. 3091917, and is separated from the left and right intervals at which the left and right tires A are supported when viewed from the traveling direction B (indicated by arrows in the figure). In addition to the arrangement, the bearings are rotatably supported by an automatic centering type bearing unit (not shown) attached to the inside of the apparatus main body 2 with a front-rear interval where the tire A is supported.

  In addition, as shown in FIGS. 7 to 10, the roller body 3 b is formed in, for example, a substantially cylindrical shape having substantially the same diameter from the outer peripheral surface on one end side to the outer peripheral surface on the other end side, and is provided at the time of rotation. A pear texture that is provided with a convex portion 3a that is low in resistance and difficult to receive substantially uniformly over the entire outer peripheral surface of the roller body 3b having a substantially hollow cross-sectional shape and that is substantially equivalent to or substantially similar to a paved road surface on which an automobile actually travels. Attached to the pattern. Further, the roller body 3b may be formed in, for example, a substantially cylindrical shape and a substantially solid cross-sectional shape.

  As shown in FIG. 5, the above-described driving device 4 is configured by a small device that does not prevent the vertical movement of the lifting platform 20 described later, and the apparatus main body 2 so that the vertical movement of the lifting platform 20 is not blocked. Built in the lower part of the center. Two chains 10 are attached between the sprockets 11 and 11 attached to the outer shaft ends of the front and rear test rollers 3 and 3 arranged on the left side and to the outer shaft ends of the front and rear test rollers 3 and 3 arranged on the right side. The sprockets 11, 11 are stretched between the two.

  In addition, a motor 12 incorporated in the lower center of the front side of the apparatus main body 2 is directly connected to the input side of the speed reducer 13, a sprocket 14 attached to the output side of the speed reducer 13, and a rear test roller 3 supported on the left and right upper surfaces. , 3, a chain 17 is stretched between the detection shaft 15 and the sprocket 16 attached to the substantially central portion of the detection shaft 15, and the driving force output from one motor 12 is reduced by a single reduction gear 13. At the same time, it is transmitted to the detection shaft 15 that connects the left and right rear test rollers 3 and 3 via the sprockets 14 and 16 and the chain 17, and the pair of front and rear test rollers 3. Direction). The chain 17 is stretched at an angle and a height at which contact with the lifting platform 20 is avoided without hindering the lifting operation of the lifting platform 20 described later.

  In addition, one clutch device 18 (for example, a cam type clutch) attached in the vicinity of or on the side of the sprocket 16 cuts off the driving force output from the motor 12 to the test roller 3 during the speed test. 3 ... is freely rotatable.

  Further, as shown in FIG. 6, the above-described driving device 4 may be provided so as to protrude outside the center of the rear side of the apparatus main body 2, and the test roller 3. It can be rotationally driven substantially interlockingly. Further, for example, either the front test roller 3 or the rear test roller 3 may be rotationally driven.

  The above-described lifting device 5 (for example, an intermediate lift device) is provided so as not to hinder the rotation of the above-described test rollers 3 and the driving of the driving device 4, and has a length for supporting the left and right tires A, A substantially horizontally. One elevating platform 20 formed in a width is provided so as to be movable up and down and vertically movable between the test rollers 3 and 3 arranged in the front and rear, and is built in the lower left and right sides of the apparatus main body 2. The upper end of the rod of the elevating cylinders 21 and 21 disposed in the substantially middle part of the elevating cylinder is connected to the left and right lower surfaces of the elevating base 20, and the elevating base 20 is stabilized while maintaining a substantially horizontal state by the operation of the elevating cylinders 21 and 21. Then, the lowering position (lift down) where the tire A is placed between the pair of front and rear test rollers 3 and 3 and the rising position where the tire A is allowed to escape and pass between the pair of front and rear test rollers 3 and 3. (Lift door Moves up and down to and up).

  In addition, when the elevator is raised, a brake device (not shown) that stops the test roller 3 so as not to rotate is actuated to facilitate the entry, escape, and passage of the tire A. The lifting platform 20 is formed in such a size and shape that the rotation of the chain 17 is not hindered and the contact with the chain 17 is avoided, or the contact with the chain 17 is avoided. A notch is formed at the lower end, or the lower limit is lowered.

  As shown in FIG. 4, the aforementioned braking force detection device 6 incorporates a braking force detector 6 a for detecting a braking force from the vehicle side, and the braking force detector 6 a is connected to the left and right tires A. , And A, corresponding to the small diameter shaft portions formed at both end portions of the detection shaft 15 for connecting the rear test rollers 3 and 3 supported on the left and right upper surfaces. In a braking test, when a braking force from the vehicle side acts on the left and right test rollers 3, a small diameter shaft portion of the detection shaft 15 to which a strain gauge (not shown) for connecting the left and right rear test rollers 3, 3 is attached. For example, torsion and distortion corresponding to the braking force generated in the first and second braking force detectors 6a and 6a constituting the pair of left and right braking force detection devices 6 and 6 are detected.

  In addition, the torsional amount and the distortion amount detected by the braking force detector 6a are converted into a voltage proportional to the transmission torque, the voltage output is converted into a frequency, and then contactlessly by an optical signal via a light receiver (not shown). The signal is output to the relay device 22 (for example, a relay amplifier), and the detection signal (frequency signal) is transmitted from the relay device 22 to the instruction device 23 described later.

  The speed detector 7 described above has a speed detector 7a for detecting the rotation of the test roller 3 attached to the inner shaft end of either the left or right front test roller 3 to drive an automobile (not shown) during the speed test. When the side tire A rotates on the test roller 3, a detection signal (pulse signal of 20 pulses per rotation of the roller) proportional to the rotation speed detected by the speed detector 7a is transmitted to the instruction device 23 described later. Further, the data is transmitted to the instruction device 23 via the relay device 22.

  As shown in FIG. 1, the above-described indicating device 23 is provided with a uniaxial two-needle analog braking force display unit 24 and a digital speed display unit 25 on the display surface of the device body 2, and is output from the braking force detector 6a. Based on the detection signal (frequency) and the detection signal (pulse signal) output from the speed detector 7a, the braking force and speed are calculated by the detection information processing device 26 incorporated in the device body 2. While calculating, the result is displayed or recorded on the braking force display unit 24 and the speed display unit 25. In addition, it has a function of holding the indicated values of braking force and speed, and can be used as a floor-standing type, a hanging type, or a fixed type display. Further, the apparatus main body 2 and the instruction apparatus 23 may be connected by wire, or the braking power display unit 24, the speed display unit 25, and the detection information processing apparatus 26 may be provided in the apparatus main body 2.

  In addition, a remote control switch 27 composed of an infrared wireless remote control is provided as standard equipment on the apparatus body 2, and an intermediate lift lift switch, an ON / OFF switch of the drive device 4, an instruction hold switch are provided on the operation surface of the remote control switch 27. , CAL switch, OFFSET switch, MODE switch (peak value display, etc.) are arranged. A wired remote control switch may be used.

  The illustrated embodiment is configured as described above, and a test method using the vehicle test apparatus 1 will be described below.

  First, at the time of a braking test of an automobile (not shown), as shown in FIG. 5, the left and right tires A and A of the automobile are supported on the left and right upper surfaces of the apparatus body 2 with respect to the elevator 20 constituting the elevator 5. The test roller 3 is moved up to a height that can be inserted between the pair of front and rear test rollers 3 and 3, and the test rollers 3 are stopped by a brake device (not shown) so as not to rotate, and the left and right tires A and A are moved left and right. After moving and getting in between the paired front and rear test rollers 3 and 3, the tire A is lowered between the pair of front and rear test rollers 3 and 3 while maintaining the balance 20 in a substantially horizontal state. The left and right tires A and A are placed between the pair of front and rear test rollers 3 and 3 that are supported on the left and right upper surfaces.

  Next, after releasing the rotation fixing of the test rollers 3 by a brake device (not shown), as shown in FIGS. 1, 2, and 3, the drive device 4 built in the substantially central portion of the device body 2 is installed. The driving force of the motor 12 is transmitted to the detection shaft 15 that connects the left and right rear test rollers 3 and 3, and the pair of front and rear test rollers 3 that are supported on the left and right upper surfaces are slow in the same direction (arrow direction). Rotate.

  Next, when an operation of depressing the brake pedal of the automobile is performed, as shown in FIG. 4, the braking force from the automobile side acts on the test roller 3 to detect the connection of the rear test rollers 3 and 3 arranged on the left and right. In the small-diameter shaft portion of the shaft 15, torsion and distortion corresponding to the braking force are prominently generated in proportion to the transmission torque. In addition, torsion and distortion generated in the small diameter shaft portion of the detection shaft 15 are electrically detected by the braking force detectors 6a and 6a constituting the pair of left and right braking force detection devices 6 and 6, respectively, and the braking force is detected. The detection amounts detected by the detectors 6a and 6a are converted into voltages, converted into a predetermined frequency, and transmitted to the relay device 22 (for example, a relay amplifier) via a light receiver (not shown) without contact with an optical signal.

  Next, during the speed test, the driving force output from the motor 12 to the test roller 3 is interrupted by the clutch device 18 and the test roller 3 is set to be freely rotatable, and then the rotation of the test roller 3 is detected by the speed detection device. 7 and a detection signal proportional to the number of revolutions detected by the speed detector 7a is output to an instruction device 23 described later.

  On the other hand, the detection signal (frequency) output from the braking force detector 6a and the detection signal (pulse signal) output from the speed detector 7a are subjected to arithmetic processing by the detection information processing device 26 incorporated in the pointing device 23. The result is displayed on the braking force display unit 24 as the braking force of the left and right tires A and A, and is displayed on the speed display unit 25 as the speed of the speedometer (not shown).

  Next, after the test, as shown in FIG. 5, the left and right tires A and A of the automobile were supported on the left and right upper surfaces while maintaining the balance 20 constituting the lifting device 5 in a substantially horizontal state. The test roller 3 is moved up to a position where it can escape from the pair of front and rear test rollers 3 and 3, and the test roller 3 is stopped by a brake device (not shown) so as not to rotate. After escaping and moving the next vehicle onto the test roller 3..., The vehicle braking test and speed test are continued in the same manner as described above.

  As described above, when the braking force from the vehicle side acts on the left and right test rollers 3 during the braking test, the control generated on the small-diameter shaft portion of the detection shaft 15 connecting the left and right rear test rollers 3 and 3. Power is electrically detected by the left and right braking force detectors 6a and 6a constituting the braking force detection device 6, and a detection signal (frequency) output from the braking force detectors 6a and 6a is built in the indicating device 23. The detected information processing device 26 performs arithmetic processing, and the result is displayed and recorded as the braking force of the left and right tires A and A. Therefore, the distortion generated in the roller is mechanically amplified and detected as in the conventional example. The detection accuracy is higher than that of the method, and the braking force is detected at a substantially middle portion between the left and right test rollers 3 and 3, so that the conditions at the time of detection are stable, and an accurate test substantially corresponding to the left and right tires A and A. As the result is obtained, Ya A, the braking force of A can be accurately and reliably measured. In addition to detecting the braking force, the rotational speed of the test roller 3 corresponding to the vehicle speedometer can be detected and measured by the speed detection device 7.

  Further, it is output from the motor 12 of the drive unit 4 between the drive unit 4 built in the substantially central part of the apparatus body 2 and the substantially central part of the detection shaft 15 connecting the left and right rear test rollers 3 and 3. A reduction gear 13 that decelerates the driving force is provided, and torsion and distortion generated in a pair of small-diameter shaft portions formed at a substantially central portion of the detection shaft 15 are detected by the braking force detection devices 6 and 6. It is not necessary to dispose the device 4 and the braking force detection device 6 to the left and right in correspondence with the left and right test rollers 3, 3, and the driving force (rotational force) output from the driving device 4 is the braking force of the left and right tires A, A. ) Can be decelerated by one speed reducer 13. And the structure and structure of the whole apparatus can be simplified and an installation space can be made small.

In the correspondence between the configuration of this device and the above-described embodiment,
The vehicle and wheel of this device correspond to the automobile and tire A of the embodiment, respectively.
Similarly,
The braking force detection means corresponds to the braking force detection device 6 and the braking force detector 6a,
The speed detection means corresponds to the speed detection device 7 and the speed detector 7a,
The braking force determination means corresponds to the instruction device 23 and the detection information processing device 26,
The driving means corresponds to the driving device 4 and the motor 12, the sprockets 14, 16, and the chain 17,
The speed reduction means corresponds to the speed reducer 13,
The clutch means corresponds to the clutch device 18,
The present invention is not limited to the configuration of the above-described embodiment, but can be applied based on the technical idea shown in the claims, and many embodiments can be obtained.

  For example, the test roller 3 in which the concavo-convex portion or the embossed portion is processed may be supported on either the front side or the rear side of the apparatus main body 2 constituting the vehicle test apparatus 1.

The perspective view which shows the test method by a vehicle test apparatus. The top view which shows the internal structure of an apparatus main body. The rear view which shows the connection state of a right-and-left test roller. The enlarged view which shows the attachment state of a braking force detection apparatus. FIG. 3 is a longitudinal side view showing an example in which a driving device is provided inside the apparatus main body. The longitudinal side view which shows the other example which provided the drive device outside the apparatus main body. The perspective view which shows the test roller which attached the convex part to the satin pattern. The enlarged side view which shows the outer periphery shape of the test roller seen from the one end side. The expanded sectional view which shows a partial outer periphery of a test roller. The enlarged plan view which shows the pattern attached to the outer peripheral surface of the test roller.

Explanation of symbols

DESCRIPTION OF SYMBOLS A ... Tire 1 ... Vehicle test apparatus 2 ... Apparatus main body 3 ... Test roller 4 ... Drive apparatus 5 ... Elevating apparatus 6 ... Braking force detection apparatus 7 ... Speed detection apparatus 15 ... Detection shaft 20 ... Elevating stand 23 ... Instruction apparatus 26 ... Detection Information processing device

Claims (5)

After the left and right wheels of the vehicle are placed between a pair of front and rear test rollers that are supported on the left and right upper surfaces of the apparatus main body, the test rollers are rotated by the driving force of the driving means built in the substantially central portion of the apparatus main body. A vehicle testing device for testing,
A braking force detecting means for detecting a braking force applied to the test roller from the vehicle side is provided on a small-diameter shaft portion formed on a detection shaft connecting the left and right test rollers,
A vehicle test apparatus provided with braking force determination means for determining the braking force of the left and right wheels based on detection information output from the braking force detection means. 2. The vehicle test apparatus according to claim 1, wherein the braking force detection means is provided on left and right small-diameter shaft portions formed at both ends of the detection shaft substantially corresponding to the left and right test rollers, respectively. The vehicle test apparatus according to claim 1, wherein speed detection means for detecting a rotation speed of the test roller is provided at an end of the test roller. A reduction means for decelerating the driving force output from the drive means is provided between the drive means built in the substantially central part of the apparatus main body and the substantially central part of the detection shaft connecting the left and right test rollers. The vehicle test apparatus according to any one of claims 1 to 3, wherein a base is provided. 5. The clutch unit according to claim 1, wherein one clutch unit that cuts off a driving force output from the driving unit and allows the test roller to freely rotate is provided at a substantially central portion of the detection shaft. Vehicle testing equipment.

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