JPH0743236U - Vehicle front wheel direction detection device on chassis dynamometer - Google Patents

Abstract

(57) [Abstract] [Purpose] A chassis dynamometer-mounted vehicle front wheel that detects an accident by detecting the inclination of the front wheel when the front wheels mounted on the rollers are not straight ahead. Get direction detection device. [Structure] An end portion of a detection bar 5 made of metal is axially mounted between bearing plates 4 and 4 projecting from a mounting plate 2 mounted on the front side of an automobile in which driving front wheels are mounted on rollers of a chassis dynamometer. There is. A support member 9 is fixed to the upper end of a pillar 8 standing on the substrate 7, and support portions 10a and 10b are provided on both ends of the support member 9 so that the proximity sensors 11a are provided on the respective opposing surfaces of the support portions 10a and 10b. , 11b are attached, and a detection bar projecting to the front side of the vehicle is located in the middle part between the support parts 10a, 10b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for detecting the direction of a front wheel placed on a roller of a chassis dynamometer when the vehicle is front-wheel drive when performing a performance test or the like of the vehicle using the chassis dynamometer.

[0002]

[Prior art]

 BACKGROUND ART For the purpose of emission, fuel consumption test, and other purposes in various modes of operation of a completed vehicle, the vehicle is run on a chassis dynamometer in a predetermined drive pattern. The chassis dynamometer, for example, as disclosed in Japanese Utility Model Publication No. 63-26754, is constructed by attaching a roller to a main shaft protruding from a dynamo main body equipped with a motor. Then, the drive wheels of the vehicle are placed on the rollers, the vehicle body is fixed to a floor or the like on which a chassis dynamometer is installed, and the drive wheels are rotated on the rollers.

When the vehicle running on the chassis dynamometer is front-wheel drive, the front wheels are placed on rollers, and the front wheels are adjusted so that their axes are substantially parallel to each other. , The steering wheel of the car is fixed and the direction of the front wheels is fixed. Then, in order to rotate the drive front wheel stably at a fixed position on the roller, rotate the drive front wheel with the chassis dynamometer before starting the test, and the direction of the drive front wheel becomes straight. It is visually confirmed that there is.

[0004]

[Problems to be solved by the device]

 As described above, the direction of the drive front wheel placed on the roller is visually confirmed by rotating the front wheel with a chassis dynamometer. Therefore, there is a problem that it may be forgotten or neglected to check the direction of the driving front wheel by rotating the driving front wheel with the chassis dynamometer, and even if the rotating state of the driving front wheel is visually checked. However, there is a problem in that confirmation may cause individual differences. Then, when the direction of the driving front wheels is inclined with respect to the radial direction of the roller and the vehicle is allowed to run on the rollers as it is, the driving front wheels are rotated while being inclined with respect to the radial direction of the roller. Will continue. Therefore, the drive front wheels may gradually move in the axial direction of the roller along with the rotation against the fixing means of the vehicle body, and the drive front wheels may deviate from the rollers. There is. In addition, since driving a car on this chassis dynamometer is often done by a robot in order to save labor and improve reproducibility of driving, if the front wheels driven as described above deviate from the rollers, Since the drive front wheels continue to rotate on the floor where the chassis dynamometer is installed, there is a risk of a runaway accident.

The present invention is intended to solve the above problems, in which the direction of the drive front wheels mounted on the roller of the chassis dynamometer is inclined with respect to the radial direction of the roller, and the vehicle is as it is. It is an object of the present invention to provide a drive front wheel direction detection device for a vehicle on a chassis dynamometer that detects the inclination of the front wheels and prevents accidents when the vehicle is driven.

[0006]

[Means for Solving the Problems]

 A vehicle front wheel direction detecting device for a vehicle on a chassis dynamometer according to the present invention is provided on a mounting member for the vehicle so as to project substantially immovably in the width direction of the vehicle, and the mounting member horizontally detects the front direction of the vehicle. It is composed of a bar and a pair of bearings located on both sides in the radial direction of the detection bar, protruding from the supporting base placed on the floor or the like with a space therebetween, and a proximity member such as metal. A proximity sensor that outputs a signal in the proximity of the above and the proximity member are respectively disposed facing the bearings and the detection bar, and the output signal of the proximity sensor in the width direction of the vehicle on the chassis dynamometer The feature is to announce the slide.

Instead of the proximity sensor, it is possible to attach a push sensor that outputs a signal when the actuating member is pushed, to either one of the bearings or the detection bar.

[0008]

[Action]

 The vehicle front wheel drive direction detection device on a chassis dynamometer of the present invention is equipped with a mounting member on the front side of the vehicle on which the drive front wheels are mounted on the rollers of the chassis dynamometer so that the detection bar can be projected and supported in front of the vehicle. The table is placed in front of the automobile, and the detection bar is placed on the upper side of the vehicle to arrange the detection bar in the intermediate portion between the pair of bearings projecting from the support table. When the vehicle is driven by a robot, for example, by stopping the operation of the robot by the output signal of the detection sensor, an accident may occur before the vehicle on the chassis dynamometer slides in its width direction. Configure to prevent. In this state, drive the car on the chassis dynamometer.

In the operation of the vehicle, when the direction of the driving front wheels is parallel to the radial direction of the rollers of the chassis dynamometer and the vehicle is in a straight traveling state, the driving front wheels are placed at the position where the driving front wheels are mounted. Keeps rolling and the car does not slide across its width on the rollers. Therefore, the detection bar continues to be positioned in the middle between the pair of bearings without moving, and the detection sensor does not output a signal, so the robot continues to drive the vehicle. However, if the direction of the drive front wheels placed on the chassis dynamometer roller is tilted so that it intersects the radial direction of the roller, and the vehicle is in a state of changing the traveling direction, the drive front wheels will rotate. As a result, the car may slide in the axial direction of the roller of the chassis dynamometer and move in the width direction of the car. When the car moves in the width direction, the detection bar moves to either bearing side at the same time. When the detection bar moves and approaches the bearing in this way, the proximity member and the proximity sensor, which are disposed so as to face the detection bar and the bearing, approach each other, and the proximity sensor outputs a signal. Alternatively, the push sensor attached to either one of the detection bar and the support portion is held between the detection bar and the support portion, and the operating member is pushed, so that the push sensor outputs a signal. The engine of the automobile is stopped based on the signal output from the proximity sensor or the push sensor to prevent accidents caused by the automobile moving in the width direction.

[0010]

【Example】

 A first embodiment of the driving front wheel direction detecting device for a vehicle on a chassis dynamometer according to the present invention will be described with reference to FIGS. In FIGS. 1 and 2, reference numeral 1 denotes a mounting member, which corresponds to a mounting plate 2 formed so as to be superposed on a license plate mounting portion (not shown) of an automobile, and corresponds to a mounting hole of the license plate mounting portion. A mounting elongated hole 3 is provided, and a pair of bearing plates 4 and 4 are provided on one surface of the mounting plate 2 so as to project at intervals in the width direction of the vehicle. Reference numeral 5 denotes a detection bar made of a metal rod, the end portion of which is axially mounted between the pair of bearing plates 4 and is substantially immovable in the width direction of the automobile. Reference numeral 6 denotes a support, which is constructed by fixing a support member 9 to the upper ends of columns 8 standing on the substrate 7. An upper lid C shown by a phantom line in FIG. 1 may be provided so that the detection bar 5 does not protrude from the support 6.

The pillar 8 is configured such that an upper pipe 8b protruding from a supporting member 9 is slidably inserted into a lower pipe 8a erected on the substrate 7, and a connecting screw 8c provided on the lower pipe 8a is attached to the upper pipe 8b. The lower pipe 8a and the upper pipe 8b are configured to be slidably connected to each other by being pressed against the peripheral surface of the. Therefore, it is possible to adjust the height of the support member 9 by changing the entire length of the column 8 by operating the connecting screw 8c. Reference numerals 10a and 10b denote a pair of support portions which are provided upright on both ends of the support member 9 with a space therebetween. The support portions 10a and 10b and the support member 9 are integrally formed of plastic. Proximity sensors 11a and 11b are attached to the respective opposing surfaces of the supporting portions 10a and 10b, and output signals when the proximity members made of metal or magnetized material are in proximity. The proximity member is arranged on the detection bar 5. In this embodiment, the detection bar 5 is made of metal and also serves as the proximity member. Reference numeral 12 is an automobile, and its driving front wheels 13 are mounted on rollers 14 of the chassis dynamometer.

As described above, when the detection bar 5 is provided with a proximity member that operates the proximity sensors 11a and 11b, the detection bar 5 can be made of metal and can also serve as the proximity member. It is also possible to form the bar 5 with plastic or the like and attach a proximity member made of a metal or a magnetic material on the surface thereof. It is also possible to attach the proximity sensors 11a and 11b to the detection bar 5 and provide the proximity members on the support portions 10a and 10b. At this time, the proximity members made of metal or magnetized material are also attached to the support portions 10a and 10b. Even when attached, the support portions 10a and 10b can be formed of metal to serve also as the proximity member. Instead of the proximity sensors 11a and 11b, it is possible to use a push sensor that outputs a signal when an operating member called a microswitch is pressed.

[0013] A vehicle that conducts an emission test, a fuel consumption test, etc. on a chassis dynamometer is generally not yet equipped with a license plate. Therefore, in the first embodiment, the license plate mounting portion is used as the mounting location of the mounting member 1. That is, as shown in FIG. 2, the mounting plate 2 of the mounting member 1 is superposed on the license plate mounting portion (not shown) of the vehicle 12 in which the driving front wheels 13 are mounted on the rollers 14 of the chassis dynamometer. The mounting plate 2 is fixed to the license plate mounting portion with bolts and nuts and the like through the mounting holes of the plate and the mounting long holes 3, and the detection bar 5 is projected to the front side of the automobile 12. Since the detection bar 5 is pivotally mounted between the bearing plates 4 and 4 protruding from the mounting plate 2, the detection bar 5 can swing in the vertical direction but cannot move in the horizontal direction. Then, the support base 6 is placed in front of the automobile, and the upper pipe 8b is moved up and down by operating the connecting screw 8c to adjust the height of the support member 9, and the detection bar 5 is mounted on the support member 9. Is placed, and the detection bar 5 is positioned approximately in the middle between the support portions 10a and 10b. On the other hand, the signals output from the proximity sensors 11a and 11b are configured to be fed back to the driving robot (not shown) arranged in the automobile 12, and the signals are input to the robot from the proximity sensors 11a and 11b. And the robot is configured to stop the engine of the automobile 12.

In the above state, the engine is started by the robot and the automobile 12 is made to travel on the rollers 14 of the chassis dynamometer in a predetermined traveling pattern. At this time, if the driving front wheels 13 placed on the rollers 14 are in the straight traveling state, the driving front wheels 13 rotate at substantially the same position of the rollers 14 and the automobile 12 does not move in the width direction. The detection bar 5 placed on the material 9 also keeps a distance from the proximity sensors 11a and 11b without substantially moving. Therefore, the proximity sensors 11a and 11b do not output a signal, and the traveling of the vehicle 12 is continued. However, if the direction of the drive front wheels 13 on the rollers 14 is inclined in the width direction of the vehicle 12, the drive front wheels 13 slide in the axial direction of the rollers 14 as the vehicle rotates, and the vehicle 12 moves in the width direction. Therefore, at the same time, the detection bar 5 moves to, for example, the support portion 10a side and approaches the proximity sensor 11a. When the detection bar 5 approaches, the proximity sensor 11a feeds back a signal to the robot, the robot stops the engine of the vehicle 12, and the driving front wheel 13 deviates from the roller 14 and becomes a runaway state. Prevent from happening. After correcting the direction of the driving front wheels 13, the driving of the vehicle 12 is restarted.

In the first embodiment, the connection between the lower pipe 8a and the upper pipe 8b constituting the support column 8 is performed by the connecting screw 8c, but the connecting means of the lower pipe 8a and the upper pipe 8b is arbitrarily selected. It is possible. For example, as widely used for connecting suction pipes of vacuum cleaners, a connecting pipe that moves forward and backward with a screw is provided on the lower pipe 8a, and the lower pipe 8a is fixed by pressure to the upper pipe 8b or released. Can also be used. Further, since the detection bar 5 is pivotally attached to the mounting plate 2 so as to be able to swing up and down, the support column 9 should not be adjusted by forming the support column 8 with one pipe or rod. It can also be configured. It is also possible to fix the detection bar 5 to the mounting plate 2 in a non-swinging manner, and adjust the height of the support member 9 by the column 8 so that the heights of the proximity sensors 11a and 11b correspond to the height of the detection bar 5. is there. The mounting plate 2 can be composed of, for example, a grid-like net formed by welding the intersections of metal wires arranged vertically and horizontally at intervals, which does not require the labor of providing mounting holes. Is.

FIG. 3 shows a second embodiment and relates to a mounting member for the detection bar. The attachment member 1a is formed of metal or plastic in a U-shaped cross section, and a cushion material 15 made of soft rubber or plastic or sponge thereof is fixed to the inner surface of the attachment member 1a. Reference numeral 16 is a fixing screw screwed into a screw hole (not shown) provided in the opposing wall of the mounting member 1a, and the cushion material 16a is also attached to the tip thereof. Numerals 4 and 4 are a pair of bearing plates projectingly provided on the mounting member 1, and the ends of the detection bar 5 are axially mounted between them. 17 is a bumper of the car.

The mounting member 1a having a U-shaped cross section is fitted with, for example, a bumper 17, and the tip of the fixing screw 16 is pressed against the bumper 17 to be mounted on the bumper 17. Therefore, it is possible to arrange the detection bar 5 by selecting almost any position in the width direction in the front part of the automobile.

FIG. 4 shows a third embodiment, and this embodiment also relates to a detection bar mounting member. In this mounting member 1b, bearing plates 4 and 4 are projected on one surface of a mounting plate 2b made of metal or plastic, and an adhesive sheet made of an adhesive material such as a magnet or a double-sided adhesive tape is mounted on the other surface of the mounting plate 2b. It is composed of 18 fixed parts. The other structure is the same as that of the first embodiment, and therefore the same reference numerals are given. Therefore, when the attachment sheet 18 is made of a magnet, the magnetic force of the attachment sheet 2b fixes the mounting plate 2b to the metal portion of the automobile so that the detection bar 5 projects toward the front side of the automobile. When the adhering sheet 18 is made of an adhesive material, the adhering sheet 18 is attached to an appropriate position on the front side of the vehicle so that the detection bar 5 is projected to the front side of the vehicle. It is possible to fix the detection bar 5 at almost any position.

FIG. 5 shows a fourth embodiment. In the fourth embodiment, a support shaft 19 having an up-and-down axis is provided with support portions 10a and 10b at both ends of a support member 9. Then, push sensors 11c and 11d provided with actuating members 20a and 20b are attached to the respective surfaces of the detection bar 5 whose ends are axially attached to the attachment member 1, facing the support portions 10a and 10b. Other configurations are the same as those in the above-described first embodiment, and are therefore denoted by the same reference numerals. As the push sensors 11c and 11d, arbitrary push switches that output a signal when an operating member called a micro switch is pushed are used.

In the fourth embodiment, the detection bars 5 are moved and the push sensors 11c and 11d are in contact with the support portions 10a and 10b, respectively. Since the swing is performed as described above, it is possible to bring the support portions 10a and 10b into contact with the push sensors 11c and 11d in a parallel state. When the actuating members 20a, 20b of the push sensors 11c, 11d are brought into contact with the bearings 10a, 10b and pushed by the movement of the detection bar 5, the push sensors 11c, 11d output a signal and the rollers of the chassis dynamometer ( (Not shown) Notify that the direction of the front driving wheel is inclined in either direction. The push sensors 11c and 11d can be replaced with proximity sensors.

FIG. 6 shows a fifth embodiment. In this embodiment, a coil bar is used as the detection bar 5. It should be noted that this coil spring must be stiff enough not to bend.

[0022]

[Effect of device]

 As described above, the device for detecting the direction of the front wheel of a vehicle mounted on a chassis dynamometer of the present invention allows the detection bar to project through the mounting member on the front side of the vehicle on which the front wheel of the drive is mounted on the chassis dynamometer, and to detect this detection. Position the bar in the middle between a pair of bearings. Then, the movement of the vehicle in the axial direction of the roller provided in the chassis dynamometer is detected by a detection bar that moves together with the vehicle and a proximity sensor or a push sensor provided in each of the bearings or the detection bar. , Proximity sensors or push sensors output signals. Therefore, when the direction of the driving front wheels is not checked by the rotation of the driving front wheels by the chassis dynamometer, even if the direction of the driving front wheels is not straight, it can be changed by moving the vehicle on the roller. It can be detected by a proximity sensor or a push sensor. Then, based on the output signal of the proximity sensor or the push sensor, it is possible to stop the engine of the vehicle on the chassis dynamometer and correct the direction of the drive front wheels. For this reason, it is possible to prevent accidents caused by the drive front wheels deviating from the above-mentioned rollers, so that a front-wheel drive vehicle can be stably driven on the chassis dynamometer to improve the performance of the vehicle. Can perform tests and other tests with high accuracy.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is a diagram illustrating the use of the first embodiment.

FIG. 3 is a sectional side view of a second embodiment.

FIG. 4 is a perspective view of a third embodiment.

FIG. 5 is a plan view of a fourth embodiment.

FIG. 6 is a perspective view of a fifth embodiment.

[Explanation of symbols]

1: Mounting member, 2: Mounting plate, 4: Bearing plate, 5: Detection bar, 6: Support base, 10a, 10b: Support part, 11a, 11b: Proximity sensor, 11c, 11d: Push sensor, 13: Driving front wheel , 14: Laura.

Claims (2)

[Scope of utility model registration request] 1. A detection bar, which is provided on a mounting member for the vehicle so as to be substantially immovable in the width direction of the vehicle so as to project horizontally toward the front of the vehicle by the mounting member, and a support bar placed on the floor or the like. And a proximity sensor configured to include a pair of support portions that are provided so as to project relative to each other and that are located on both sides in the radial direction of the detection bar, and that output a signal when a proximity member such as a metal approaches. Are arranged respectively facing the respective bearings and the detection bar, and the front-wheel direction detection device for the vehicle on the chassis dynamometer for notifying the widthwise slide of the vehicle on the chassis dynamometer by the output signal of the proximity sensor . 2. The drive front wheel direction detection device for a chassis dynamometer vehicle according to claim 1, wherein a push sensor for pressing the actuating member and outputting a signal is attached to either one of the support portion and the detection bar.