JP2004361213A - Vehicle testing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle testing device capable of measuring accurately and surely braking forces of right and left wheels constituting the vehicle. <P>SOLUTION: A pair of front-and-rear testing rollers 3, 3 journaled on right and left upper faces of a device body 2 constituting this vehicle testing device 1 are rotated integrally by a driving force of a driving device 4. When a driving force from the vehicle side works on the testing roller 3 at the braking test time, a braking force (for example, torsion or strain) generated in a detection shaft 15 for connecting the rear testing rollers 3, 3 is electrically detected by braking force detectors 6a, 6a constituting a braking force detection device 6, and operation processing of a detection signal outputted from the braking force detector 6a is performed by a detection information processing device 26 incorporated in an indicating device 23, and the result is displayed and recorded as the braking forces of right and left tires A. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hybrid vehicle test apparatus used for testing, for example, one or both of a braking force (brake) and a speed (speed).
[0002]
[Prior art]
Conventionally, as a test device used in the above-described test, for example, after placing the left and right wheels of the vehicle between a pair of front and rear rollers bearing on the left and right upper surfaces of the bogie, a pair of front and rear rollers, a motor provided on the bogie Rotate with driving force. In addition, when a braking force from the vehicle acts on the roller, distortion generated in the roller is mechanically amplified, and is independently detected by a distortion detector (for example, a load cell) connected to an end of the roller. In addition, the lifter plate provided between the pair of front and rear rollers is independently moved by a lifting cylinder into a lowering position where the vehicle wheel is put between the pair of front and rear test rollers and a rising position where the vehicle wheel can escape from the pair of front and rear test rollers. There is a vehicle braking test device of Patent Document 1 which moves up and down.
[0003]
[Patent Document 1]
JP-A-5-126684.
[0004]
[Problems to be solved by the invention]
However, the above-described vehicle braking test device mechanically amplifies and detects the distortion generated in the left and right rollers during the braking test, so it is difficult to accurately detect the distortion generated in the rollers themselves, and the detection is difficult. Low accuracy. In addition, since the distance between the strain detectors connected to the left and right rollers is wide, the detection conditions of the right and left strain detectors are different, and the condition difference is large. Therefore, it is impossible to accurately and reliably test the braking force of the left and right wheels.
[0005]
In view of the above problems, the present invention can accurately and reliably measure the braking force of the left and right wheels by electrically detecting the braking force generated on the detection shaft connecting the left and right test rollers with the braking force detection means. The purpose of the present invention is to provide a vehicle test device that can perform the test.
[0006]
[Means for Solving the Problems]
According to the present invention, after the left and right wheels of a vehicle are placed between a pair of front and rear test rollers bearing on the left and right upper surfaces of the apparatus main body, each of the test rollers is rotated by a driving force of a driving unit built in the apparatus main body. A vehicle test apparatus for testing, wherein braking force detection means for detecting a braking force applied to a test roller from the vehicle is provided on a detection shaft connecting the left and right test rollers, and output from the braking force detection means. It is a vehicle test apparatus provided with braking force determination means for determining the braking force of the left and right wheels based on the detected information.
[0007]
The above-described vehicle includes, for example, an automobile, a motorcycle, a truck, a bus, and the like. The wheels of the vehicle include, for example, rubber tires, metal and wood simple and composite wheels, and the like. The driving means is composed of, for example, a driving device and a motor, a speed reducer, a sprocket, a chain, and the like. Further, the braking force detection means, for example, when a braking force from the vehicle side acts on the test roller, a torsion torque detection device that detects a twist generated in the test roller, a distortion detection device that detects distortion generated in the test roller, It consists of an optical detector, an overcurrent detector, a contact detector, and the like. The braking force determination device includes, for example, a personal computer, a host computer, a determination control device including a CPU, a ROM, and a RAM, a detection information processing device built in the computer determination control device, and the like.
[0008]
That is, after the left and right wheels of the vehicle are placed between a pair of front and rear test rollers bearing 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 driving means built in the apparatus main body. . At the time of the braking test, when the braking force from the vehicle acts on the test roller, for example, torsion or distortion corresponding to the braking force generated on the detection shaft connecting the left and right test rollers is electrically detected by the braking force detecting means. The braking force of the vehicle is determined by the braking force determining means based on the detected information output from the braking force detecting means.
[0009]
As an embodiment, the braking force detection means may be provided at both ends of the detection shaft substantially corresponding to the left and right test rollers. That is, the braking force can be detected substantially corresponding to the left and right wheels. Further, the braking force detecting means can be provided on small diameter shaft portions formed at both ends of the detection shaft substantially corresponding to the left and right test rollers. In other words, when the braking force from the vehicle acts on the test roller, the braking force (for example, twisting or distortion) is remarkably generated in the small diameter shaft portion of the detection shaft connecting the left and right test rollers. Can be detected. Further, a speed detecting means for detecting a rotation speed of the test roller may be provided at an end of the test roller. That is, in addition to the detection of the braking force, the rotation speed of the test roller corresponding to the speedometer of the vehicle can be detected.
[0010]
[Action and effect]
According to the present invention, at the time of a test, when the braking force from the vehicle acts on the test roller, the braking force generated on the detection shaft connecting the left and right test rollers is detected by the braking force detection means, and the detection information is obtained. The braking force of the left and right wheels is determined by the braking force determination means based on the above, 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, and the left and right test Since the braking force is detected at the approximate middle of the roller, the conditions at the time of detection are stable, accurate test results can be obtained corresponding to the left and right wheels, and the braking force of the left and right wheels can be measured accurately and reliably. can do. In addition to the detection of the braking force, the rotation speed of the test roller corresponding to the speedometer of the vehicle can be detected and measured by the speed detection means.
[0011]
【Example】
An embodiment of the present invention will be described below in detail with reference to the drawings.
The drawings show a combined type vehicle test apparatus used for a braking test and a speed test of an automobile as an example of a vehicle. In FIGS. 1, 2 and 3, the vehicle test apparatus 1 is, for example, a small car or a medium-sized car. A pair of front and rear test rollers 3 supporting left and right tires A, A constituting an automobile (not shown) such as a car, a large car, etc., are attached to openings 2a. A drive unit 4 for rotating a pair of front and rear test rollers 3... Mounted on the vehicle, an elevating device 5 for facilitating entry and exit of the vehicle, and a braking force detection device 6 for detecting a braking force from the vehicle. A speed detecting device 7 for detecting the rotation speed of the test rollers 3 corresponding to the speed of the speedometer is built in substantially the center of the device main body 2.
[0012]
The above-described test roller 3 is constituted by a vehicle test roller disclosed in Japanese Utility Model Registration No. 3091917, and is separated by a left-right interval in which the right and left tires A are supported when viewed from a running direction B (indicated by an arrow in the drawing). They are arranged and are rotatably supported by a self-aligning type bearing unit (not shown) mounted inside the apparatus main body 2 at an interval in the front-rear direction where the tire A is supported.
[0013]
Further, as shown in FIGS. 7 to 10, the roller body 3b is formed in 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, for example. A convex portion 3a having a small resistance and being hardly received is provided substantially uniformly over the entire outer peripheral surface of the roller body 3b having a substantially hollow cross-sectional shape, and has a matte texture that is substantially equal to or substantially similar to a pavement road surface on which an automobile actually travels. Attached to the pattern. Further, the roller body 3b may be formed, for example, in a substantially cylindrical shape and a substantially solid cross-sectional shape.
[0014]
The driving device 4 is a small device that does not hinder the vertical movement of the elevator 20 as described below, as shown in FIG. 5. It is built in the lower part of the approximate center. Further, two chains 10 are attached between the sprockets 11, 11 attached to the outer shaft ends of the front and rear test rollers 3, 3 arranged on the left side, and to the outer shaft ends of the front and rear test rollers 3, 3 arranged on the right side. The sprockets 11 and 11 are respectively stretched.
[0015]
Further, a motor 12 built in the lower front center of the apparatus body 2 is directly connected to the input side of the speed reducer 13, and a sprocket 14 mounted on the output side of the speed reducer 13 and the rear test roller 3 mounted on the left and right upper surfaces. A chain 17 is stretched between a sprocket 16 and a sprocket 16 attached to a substantially central portion of a detection shaft 15 which directly connects the driving shaft 3 and the driving shaft 3. The driving force output from one motor 12 is reduced by the speed reducer 13 and the sprockets 14, 16 Through a chain 17 to a detection shaft 15 connecting the left and right rear test rollers 3 and 3, and a pair of front and rear test rollers 3. Is driven to rotate. Note that the chain 17 is stretched at an angle and a height at which the lifting operation of the lifting platform 20 described later is not hindered and contact with the lifting platform 20 is avoided.
[0016]
Further, a clutch device 18 (for example, a cam-type clutch) mounted near 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, and connects the test rollers 3. Enable free rotation.
[0017]
Further, as shown in FIG. 6, the above-mentioned driving device 4 may be provided so as to protrude outside the rear center of the device main body 2, and the test rollers 3 are driven by the driving force output from the motor 12 in the same manner as described above. It can be driven to rotate substantially in conjunction. Further, for example, one of the front test roller 3 and the rear test roller 3 may be rotationally driven.
[0018]
The lifting device 5 (for example, an intermediate lifting device) is provided so as not to hinder the rotation of the test rollers 3 and the driving of the driving device 4, and has a length that allows the left and right tires A, A to be supported substantially horizontally. One elevating table 20 having a width is provided so as to be vertically movable and vertically movable between test rollers 3 and 3 arranged in front and rear. The upper ends of the rods of the elevating cylinders 21 and 21 arranged at the substantially middle part of the elevating table 20 are connected to the lower left and right surfaces of the elevating table 20, and the elevating table 20 is stabilized while being maintained in a substantially horizontal state by the operation of the elevating cylinders 21 and 21. (A lift-down position) where the tire A is put between the pair of front and rear test rollers 3 and 3, and a rising position where the tire A is allowed to escape and pass between the pair of front and rear test rollers 3 and 3. (Lifta Moves up and down to and up).
[0019]
In addition, a brake device (not shown) that stops the test roller 3 so that the test roller 3 cannot rotate when the ascending and descending platform rises is activated, thereby making it easy for the tire A to get in, escape, and pass. In addition, the lift 20 is formed in a size and a shape such that the rotation of the chain 17 is not hindered and the contact with the chain 17 is avoided. Notch or restricting to a lower limit lowering position.
[0020]
As shown in FIG. 4, the above-described braking force detection device 6 has a braking force detector 6a for detecting a braking force from the vehicle side built in the device, and the braking force detector 6a is connected to the left and right tires A. , A, are attached to small diameter shaft portions formed at both ends of the detection shaft 15 for connecting the rear test rollers 3, 3 which are mounted on the left and right upper surfaces. In the braking test, when a braking force from the vehicle acts on the left and right test rollers 3, the 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, distortion, and the like corresponding to the braking force generated in the left and right are detected by the braking force detectors 6a, 6a constituting the pair of left and right braking force detection devices 6, 6, respectively.
[0021]
In addition, the torsion amount and the distortion amount detected by the braking force detector 6a are converted into a voltage proportional to the transmission torque, and the voltage output is converted into a frequency. 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 an instruction device 23 described later.
[0022]
The above-mentioned speed detecting device 7 has a speed detector 7a for detecting rotation of the test roller 3 attached to the inner shaft end of one of the left and right front test rollers 3, and drives a vehicle (not shown) during a speed test. When the side tire A rotates on the test roller 3, a detection signal (pulse signal of 20 pulses per roller rotation) proportional to the number of rotations detected by the speed detector 7a is transmitted to the instruction device 23 described later. Further, it transmits to the instruction device 23 via the relay device 22.
[0023]
As shown in FIG. 1, the indicating device 23 has an analog braking force display unit 24 and a digital speed display unit 25 each having a single shaft and two hands on the display surface of the device main body 2, and is output from the braking force detector 6a. The braking information and the speed are calculated by the detection information processing device 26 incorporated in the device main body 2 based on the detection signal (frequency) detected by the detection device 7 and the detection signal (pulse signal) output from the speed detector 7a. In addition to the calculation, the result is displayed on the braking force display unit 24 and the speed display unit 25 or recorded. In addition, it has a function of holding the indicated values of the braking force and the speed, and can be used as a floor-standing type, a hanging type, or a fixed type display. Further, the device main body 2 and the pointing device 23 may be connected by wire, or the braking force display unit 24, the speed display unit 25, and the detection information processing device 26 may be provided in the device main body 2.
[0024]
In addition, a remote control switch 27 composed of an infrared wireless remote controller is provided as standard equipment on the apparatus main body 2, and an operation surface of the remote control switch 27 includes, for example, a lift switch of an intermediate lift, an ON / OFF switch of the drive device 4, and an instruction hold switch. , CAL switch, OFFSET switch, MODE switch (peak value display, etc.). Further, a wired remote control switch may be used.
[0025]
The illustrated embodiment is configured as described above, and a test method using the vehicle test apparatus 1 will be described below.
[0026]
First, at the time of a braking test of an automobile (not shown), as shown in FIG. 5, the elevator 20 constituting the elevator 5 is mounted on the left and right upper surfaces of the left and right tires A, A of the automobile. The test rollers 3 are lifted to a height at which they can ride between the pair of front and rear test rollers 3 and 3 so that the test rollers 3... After moving and riding between the pair of front and rear test rollers 3 and 3, the elevator 20 is lowered while the tire A is put between the pair of front and rear test rollers 3 while maintaining the balance in a substantially horizontal state. Then, the left and right tires A, A are put between the pair of front and rear test rollers 3 and 3 which are mounted on the left and right upper surfaces.
[0027]
Next, after the rotation of the test rollers 3... By the brake device (not shown) is released, as shown in FIGS. 1, 2, and 3, the driving device 4 built in substantially the center of the device main body 2 is used. The driving force of the motor 12 is transmitted to the detection shaft 15 connecting the left and right rear test rollers 3 and the pair of front and rear test rollers 3 bearing on the left and right upper surfaces are moved at a low speed in the same direction (arrow direction). Rotate.
[0028]
Next, when an operation of depressing the brake pedal of the automobile is performed, as shown in FIG. 4, a braking force from the automobile acts on the test rollers 3 to detect the connection of the rear test rollers 3, 3 arranged on the left and right. In the small-diameter shaft portion of the shaft 15, torsion, distortion, or the like corresponding to the braking force is significantly generated in proportion to the transmission torque. In addition, torsion, distortion, and the like generated in the small diameter shaft portion of the detection shaft 15 are electrically detected by the braking force detectors 6a, 6a constituting the pair of left and right braking force detection devices 6, 6, respectively. After the detection amounts detected by the devices 6a, 6a are converted into voltages, they are converted into a predetermined frequency, and transmitted to a relay device 22 (for example, a relay amplifier) through an optical receiver (not shown) in a non-contact manner by an optical signal.
[0029]
Next, at the time of the speed test, the driving force output from the motor 12 to the test roller 3 is cut off by the clutch device 18, and the test rollers 3 are set to be freely rotatable. 7, and outputs a detection signal proportional to the rotation speed detected by the speed detector 7a to an instruction device 23 described later.
[0030]
On the other hand, a detection signal (frequency) output from the braking force detector 6a and a detection signal (pulse signal) output from the speed detector 7a are arithmetically processed by a detection information processing device 26 built in the pointing device 23. Then, the result is displayed on the braking force display unit 24 as the braking force of the left and right tires A, A, and is displayed on the speed display unit 25 as the speed of a speedometer (not shown).
[0031]
Next, after the test, as shown in FIG. 5, the left and right tires A, A of the automobile were bearing on the left and right upper surfaces while maintaining the balance of the elevator 20 constituting the elevator 5 in a substantially horizontal state. The ascending operation is carried out to the ascending position where the test rollers 3 can escape from the pair of front and rear test rollers 3, and the test rollers 3 are stopped by a brake device (not shown) so that they cannot rotate. After the vehicle escapes and the next vehicle is moved onto the test rollers 3, the braking test and the speed test of the vehicle are continuously performed in the same manner as described above.
[0032]
As described above, in the braking test, when the braking force from the vehicle acts on the left and right test rollers 3..., The control generated on the small diameter shaft portion of the detection shaft 15 connecting the left and right rear test rollers 3, 3. The power is electrically detected by the left and right braking force detectors 6a, 6a constituting the braking force detection device 6, and a detection signal (frequency) output from the braking force detectors 6a, 6a is built in the indicating device 23. The detected information processing device 26 performs arithmetic processing and displays and records the result as the braking force of the left and right tires A, A, so that the distortion generated in the rollers is mechanically amplified and detected as in the conventional example. Since the detection accuracy is higher than the method and the braking force is detected at a substantially intermediate portion between the left and right test rollers 3 and 3, the conditions at the time of detection are stable, and an accurate test is performed substantially corresponding to the left and right tires A and A. The result is obtained, Ya A, the braking force of A can be accurately and reliably measured. In addition to the detection of the braking force, the rotation speed of the test roller 3 corresponding to the speedometer of the vehicle can be detected and measured by the speed detection device 7.
[0033]
In correspondence between the configuration of the present invention and the above-described embodiment,
The vehicle and the wheels of the present invention respectively correspond to the automobile and the tire A of the embodiment,
Similarly,
The braking force detection means corresponds to the braking force detection device 6 and the braking force detector 6a of the embodiment,
The speed detecting means corresponds to the speed detecting 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 speed reducer 13, the sprockets 14, 16 and the chain 17,
The present invention is not limited only to the configuration of the above embodiment.
[0034]
For example, the test roller 3 having the concave and convex portions or the embossed portion may be bearing on one of the front side and the rear side of the apparatus main body 2 constituting the vehicle test apparatus.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a test method using a vehicle test apparatus.
FIG. 2 is a plan view showing the internal structure of the apparatus main body.
FIG. 3 is a rear view showing a connected state of left and right test rollers.
FIG. 4 is an enlarged view showing an attached state of the braking force detection device.
FIG. 5 is a vertical sectional side view showing an example in which a driving device is provided inside the device main body.
FIG. 6 is a longitudinal sectional side view showing another example in which the driving device is provided outside the device main body.
FIG. 7 is a perspective view showing a test roller in which convex portions are provided in a satin pattern.
FIG. 8 is an enlarged side view showing the outer peripheral shape of the test roller viewed from one end side.
FIG. 9 is an enlarged cross-sectional view showing a part of the outer periphery of a test roller.
FIG. 10 is an enlarged plan view showing a pattern attached to the outer peripheral surface of the test roller.
[Explanation of symbols]
A ... tire 1 ... vehicle testing device 2 ... device main body 3 ... test roller 4 ... driving device 5 ... lifting device 6 ... braking force detection device 7 ... speed detection device 15 ... detection shaft 20 ... lifting platform 23 ... indicating device 26 ... detection Information processing equipment

Claims (4)

A vehicle test in which the right and left wheels of a vehicle are placed between a pair of front and rear test rollers bearing on the left and right upper surfaces of the apparatus main body, and each of the test rollers is rotated by a driving force of a driving unit built in the apparatus main body to perform a test. A device,
A braking force detecting means for detecting a braking force applied to the test roller from the vehicle side is provided 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 at both ends of the detection shaft substantially corresponding to the left and right test rollers. 2. The vehicle test apparatus according to claim 1, wherein said braking force detecting means is provided on small diameter shaft portions formed at both ends of said detection shaft substantially corresponding to said left and right test rollers. The vehicle test apparatus according to claim 1, wherein a speed detecting means for detecting a rotation speed of the test roller is provided at an end of the test roller.

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