JPH06249758A - Roll characteristic tester for vehicle - Google Patents

Abstract

PURPOSE:To provide a roll characteristic tester for a vehicle in which static and dynamic roll characteristics of the vehicle can be accurately measured. CONSTITUTION:Movable bases 24, 25 which place a vehicle 11 are provided movably in a lateral direction of the vehicle by a drive actuator 30, a position G of a center of gravity of the vehicle 11 and a frame 33 at the side of the vehicle 11 are coupled by a coupling rod 35 having a tension detecting load cell 38, and a horizontal detector 39 is provided at the rod 35. A controller 41 operates a vertical regulation actuator 40 based on an output of the detector 39 thereby to maintain the rod 35 in a horizontal state. The bases 24, 25 which place the vehicle 11 are provided reciprocatingly movably in a lateral direction of the vehicle by the actuator 30. The actuator 30 is controlled by the controller 41 to reciprocate the bases 24, 25 at a predetermined speed to detect vertical load to be operated at tires 12, 13 of the vehicle 11 on the bases 24, 25 by load cells 26, 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle roll characteristic testing apparatus for measuring static and dynamic roll characteristics of a vehicle mounted on a test stand.

[0002]

2. Description of the Related Art In recent years, the demand for outdoor-oriented four-wheel drive vehicles has been increasing. However, in this four-wheel drive vehicle, the vehicle height is higher than that of a normal passenger vehicle, and therefore the vehicle tends to roll over. It is in. Further, the tendency becomes larger as the engine performance of the vehicle is improved and the grip force of the tire is improved. Therefore, it is necessary to design the vehicle by sufficiently grasping the roll characteristics of the vehicle. Conventionally, a vehicle is subjected to a side pull test by a roll characteristic test device to measure the rollover limit of the vehicle.

FIG. 2 schematically shows a conventional rolling characteristic testing apparatus for a vehicle for performing a side pull test. As shown in the figure, in the conventional rolling characteristic testing device 101 for a vehicle, the vehicle 1 is mounted on the fixed bases 103 and 104 of the test base 102.
The left and right tires 12 and 13 of No. 1 are placed on the non-slip member 10
5, 106 prevent the tires 12, 13 from sliding laterally. A frame 107 is erected on a side of the vehicle 11 on the test stand 102, and a pulley 108 is pivotally supported on the frame 107. The tow rope 109 connected to the center of gravity G of the vehicle 11 is hung around the pulley 108.

To measure the rollover limit of the vehicle 11, the winch or the like (not shown) pulls the tow rope 109 in the direction of the arrow by a predetermined towing force F. Then, the load movement of the vehicle 11 and the rollover limit until rollover at this time are measured.

[0005]

In the above-described conventional roll characteristic testing device for a vehicle, the roll characteristic test is performed by pulling the center of gravity G of the vehicle 11 laterally by the tow rope 109. The lateral force that acts when the vehicle 11 actually travels acts on the position G of the center of gravity of the vehicle 11,
An appropriate roll characteristic can be obtained by pulling the gravity center position G of the vehicle 11 in the horizontal and horizontal directions during the roll characteristic test.

However, when the gravity center position G of the vehicle 11 is pulled laterally, the gravity center position G of the vehicle 11 inevitably rises because the vehicle 11 tilts in the pulling direction. Further, the vehicle 11 is supported by the left and right tires 12 and 13 via suspensions 14 and 15, respectively, and when lateral force is applied during running or testing of the vehicle 11, the coil springs 16 of the suspensions 14 and 15 are applied. , 17 are compressed or expanded and the center of gravity position G of the vehicle 11 changes. Therefore, during the roll characteristic test, the gravity center position G of the vehicle 11 cannot always be pulled in the horizontal direction, and there is a problem in that an appropriate roll characteristic cannot be obtained.

When a lateral force is applied to the vehicle 11, there are static (at stop) roll characteristics and dynamic (at running) roll characteristics. In the conventional roll characteristic test device for a vehicle, the center of gravity position G of the vehicle 11 is pulled by the pulling rope 109 to perform the roll characteristic test. Therefore, a static load when a lateral force is applied to the vehicle 11 is applied. Roll characteristics such as migration and rollover limits can be obtained. However, since the vehicle 11 is equipped with the suspensions 14 and 15 (coil springs 16 and 17), when a lateral force acts on the center of gravity G when the vehicle 11 travels (turns),
The roll behavior of the vehicle 11 is affected by the friction of the suspensions 14 and 15 and the influence of the damper. Therefore, the conventional roll characteristic testing device for a vehicle cannot obtain appropriate roll characteristics affected by these factors.

Further, in the conventional rolling characteristic testing device for a vehicle, since there is no time delay with respect to the lateral force acting on the center of gravity G of the vehicle 11, the instantaneous rolling behavior of the vehicle 11 is measured. I couldn't.

The present invention solves such a problem, and an object of the present invention is to provide a roll characteristic testing device for a vehicle, which can accurately measure the static and dynamic roll characteristics of the vehicle. .

[0010]

A roll characteristic test apparatus for a vehicle according to the present invention for achieving the above-mentioned object is a test apparatus for measuring the roll characteristic of a vehicle on a test stand, in which the vehicle is mounted. A movable table that is provided so as to be movable in the lateral direction of the vehicle with respect to the test table, a drive actuator that moves the movable table, one end of which is connected to the center of gravity of the vehicle and the other end of which is A connecting rod movably supported up and down on a frame standing upright on the side of the vehicle on the test stand, a tension detecting means provided on the connecting rod, and the vertical position of the other end of the connecting rod is adjusted. A free vertical adjustment actuator, a horizontal detector for detecting the horizontal state of the connecting rod, and a control device for maintaining the horizontal state of the connecting rod by operating the vertical adjusting actuator by the output of the horizontal detector. And And it is characterized in that there was example.

The rolling characteristic testing apparatus for a vehicle according to the present invention is a testing apparatus for measuring rolling characteristics of a vehicle on a test bench, wherein the vehicle is mounted and the lateral direction of the vehicle with respect to the testing bench. A movable table provided along the movable table, a drive actuator for reciprocating the movable table, a controller for controlling the drive actuator to reciprocate the movable table at a predetermined speed, and the movable table And a tire of the vehicle, and a load detecting means for detecting a vertical load acting on each tire.

[0012]

When a static roll characteristic test of a vehicle is performed, the vehicle is placed on a movable table which is movable with respect to the test table, and the connecting bar is used to set the center of gravity of the vehicle on the movable table and the frame. In the connected state, the moving base on which the vehicle is placed is moved by the drive actuator, the tension acting on the connecting rod is detected by the tension detecting means, and the roll characteristics such as the load movement and rollover limit of the vehicle are measured. At this time, if the position of the center of gravity moves up or down due to the rolling behavior of the vehicle, the horizontal detector constantly detects the horizontal state of the connecting rod, and the detection data causes the control device to activate the vertical adjustment actuator to connect the two. Keep the bar horizontal.

When testing the dynamic roll characteristics of a vehicle, the control device controls the drive actuator to place the vehicle while the vehicle is placed on a movable table that is movable with respect to the test table. Roll characteristics such as load movement and rollover limit of the vehicle are measured by reciprocating the placed moving table at a predetermined speed and detecting the vertical load acting on the tire of the vehicle on the moving table by the load detecting means. To do.

[0014]

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

FIG. 1 is a schematic view showing a rolling characteristic testing apparatus for a vehicle according to an embodiment of the present invention. It should be noted that the members having the same functions as those of the related art are designated by the same reference numerals, and the duplicate description will be omitted.

As shown in FIG. 1, in the rolling characteristic testing device 21 for a vehicle according to this embodiment, the vehicle 11 is mounted on the test stand 22.
A guide rail 23 is laid along the lateral direction of
Moving bases 24 and 25 are movably supported on the guide rail 23, and load cells 26 and 27 for detecting vertical loads acting on the tires 12 and 13 are mounted on the moving bases 24 and 25, respectively. There is. Also, the moving table 2
4 and 25 are connected by a connecting rod 29 having an adjusting jig 28 so that the distance between them can be adjusted. A servo valve actuator 30 is connected to one of the movable tables 24 so that the movable tables 24 and 25 can reciprocate along the guide rail 23. Further, a displacement gauge 31 is attached to the test stand 22 so that the positions of the moving stands 24 and 25 can be detected. Incidentally, 32 is the left and right tires 12, 13 of the vehicle 11.
Although it is ideal that it is a non-slip material that does not come into contact with the tires 12 and 13, the position of the contact portion is lower than the center of gravity G of the vehicle, and has little influence on the test data. it is conceivable that.

A frame 33 is erected on the test stand 22 at the side of the vehicle 11.
A rail 34 extending vertically is attached to 3. The connecting rod 35 connects the vehicle 11 and the frame 33. One end of the connecting rod 35 is connected to the center of gravity G of the vehicle 11 by a spherical bearing 36, and the other end of the connecting rod 35 moves up and down on the rail 34 of the frame 33 by a spherical bearing 37. It is movably supported. A tension detecting load cell 38 is attached to the connecting rod 35, and a pendulum switch 39 as a horizontal detector incorporating a potentiometer is attached. Further, the other end of the connecting rod 35 and the mounting portion of the rail 34 are provided with a vertical adjustment actuator 40 capable of adjusting the vertical position of the other end of the connecting rod 35.

Roll characteristic tester 21 for vehicle of this embodiment
In this case, when the center of gravity G of the vehicle 11 moves up and down due to the rolling behavior of the vehicle 11, the connecting rod 35 cannot maintain a horizontal state and cannot apply an appropriate tension to the vehicle 11. By vertically moving the other end, its position is adjusted so that the connecting rod 35 can always be maintained in a horizontal state.

That is, the hydraulic control unit 41 as a control device is connected to the hydraulic unit (hydraulic pressure source) 42, and is also connected to the servo valve actuator 30 and the vertical adjustment actuator 40. By controlling the hydraulic pressure,
Its operation can be controlled. Further, an operation panel 43 is connected to the hydraulic control unit 41 and the hydraulic unit 42, and a displacement gauge 31 is connected to the operation panel 43 so that the movable bases 24, 25 are connected.
Position data is input, the tension detecting load cell 38 and the pendulum switch 39 are connected, and the tension data of the connecting rod 35 and its inclination (horizontal) data are input.

Thus, when the static roll characteristic test of the vehicle 11 is performed, the tire 1 of the vehicle 11 is mounted on the moving bases 24 and 25.
2 and 13 are placed, and the center of gravity position G of the vehicle 11 and the rail 34 of the frame 33 are connected by the connecting rod 35. Then, the operator operates the pendulum switch 39 input to the operation panel 43.
Based on the inclination data of the connecting rod 35, the actuator 40 for vertical adjustment via the hydraulic control unit 41.
To bring the connecting rod 35 into a horizontal state. From this state, the operator operates the operation panel 43, operates the servo valve actuator 30 via the hydraulic control unit 41, and moves the movable tables 24 and 25 to the right in FIG. Will be given. At this time,
When the center of gravity G rises or falls due to the roll behavior of the vehicle 11, the actuator 40 for vertical adjustment is operated based on the tilt data of the connecting rod 35 input from the pendulum switch 39 to the hydraulic control unit 41, and the connecting rod 3 is operated.
Maintain the horizontal condition of 5.

The tension acting on the connecting rod 35 is detected by the tension detecting load cell 38, the tension data is input to the operation panel 43, and the position data of the movable bases 24 and 25 detected by the displacement gauge 31 are detected. Is entered. Therefore, these input data and load cell 2
From the vertical loads of the tires 12 and 13 detected by the sensors 6 and 27, the load characteristics of the vehicle 11 and roll characteristics such as rollover limit can be measured. Incidentally, the rollover limit of the vehicle refers to a state immediately before the inner tire takes off when the vehicle turns, and in the present embodiment, the vertical load of the tire on the floating side detected by the load cell during the test. Corresponds to the state when is zero. Therefore, the tension detecting load cell 38 at this time
The roll characteristics can be obtained from various data such as the tension data detected by.

When the dynamic roll characteristic test of the vehicle 11 is performed, the tire 1 of the vehicle 11 is mounted on the moving bases 24 and 25.
With the Nos. 2 and 13 placed, the connecting rod 35 that connects the gravity center position G of the vehicle 11 and the rail 34 of the frame 33 is removed. In this state, the operator operates the operation panel 43, operates the servo valve actuator 30 via the hydraulic control unit 41, and reciprocates the movable tables 24 and 25 left and right at a predetermined speed to roll the vehicle 11. Give behavior. Then, the load cells 26 and 27 arranged below the tires 12 and 13 are used to move the movable tables 24 and 25.
By detecting the vertical load acting on the tires 12 and 13 of the upper vehicle 11, roll characteristics such as load movement and rollover limit of the vehicle 11 are measured.

As described above, in the vehicle roll characteristic test device 21 of this embodiment, a side pull test and a lateral roll behavior test by inertial input can be performed using one test device.

Further, by adjusting the distance between the movable bases 24 and 25 with the adjusting jig 28, it is possible to adapt to the tread base of various vehicles to be tested. In the above-described embodiment, only the left-right direction of the vehicle has been described, but all four tires of the vehicle are mounted on different moving bases, and the front and rear wheels of the vehicle have substantially the same structure. There is. The same jig as the above-described adjusting jig 28 is also mounted between each of the movable bases located in the front and rear, and can be adjusted according to the wheel bases of various vehicles. Further, by giving different behavior to the front and rear wheels of the vehicle by controlling the operation of the servo valve actuator 30 by the hydraulic control unit 41, it is possible to measure not only the rolling characteristic but also the yawing characteristic.

[0025]

As described above in detail with reference to the embodiments, according to the rolling characteristic testing apparatus for a vehicle of the present invention, the moving table on which the vehicle is mounted by the drive actuator is mounted on the testing table of the vehicle. It is movably provided along the horizontal direction, and the center of gravity of the vehicle on the moving table and the frame standing on the side of the vehicle are connected by a connecting rod having a tension detecting means, and the frame-side connecting portion is vertically adjusted. It is supported by an actuator for vertical movement, a horizontal detector is provided on the connecting rod, and the control device operates the vertical adjusting actuator based on the output of this horizontal detector so that the horizontal state of the connecting rod is maintained. Therefore, the stress can be applied to the center of gravity of the vehicle at all times with a simple structure, and the static roll characteristics of the vehicle can be accurately measured.

Further, according to the rolling characteristic testing apparatus for a vehicle of the present invention, the moving table on which the vehicle is mounted is provided by the drive actuator so as to be reciprocally movable in the lateral direction of the vehicle with respect to the testing table, and the control device is provided. The drive actuator is controlled to reciprocate the moving base at a predetermined speed, and the load detecting means detects the vertical load acting on each tire of the vehicle on the moving base. Therefore, the influence of the friction of the suspension and the damper. It is possible to detect the influence of the rolling back of the vehicle due to, etc., and it is possible to perform a sine wave or triangular wave input excitation and perform a vehicle slalom or lane change simulation test.
With a simple structure, the dynamic roll characteristics of the vehicle can be accurately measured.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a roll characteristic test device for a vehicle according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a conventional rolling characteristic testing device for a vehicle.

[Explanation of symbols]

 11 Vehicle 12, 13 Tire 14, 15 Suspension 21 Roll Characteristic Test Device 22 Test Stand 24, 25 Mobile Stand 26, 27 Load Cell 28 Adjusting Jig 30 Servo Valve Actuator 31 Displacement Meter 33 Frame 35 Connecting Rod 38 Load Cell 39 Pendulum Switch 40 Up and Down Adjustment actuator 41 Hydraulic control unit 42 Hydraulic unit 43 Operation panel

Claims (2)

[Claims] 1. A test apparatus for measuring a roll characteristic of a vehicle on a test table, wherein the vehicle is mounted, and a movable table is provided movably along the lateral direction of the vehicle with respect to the test table. A driving actuator for moving the moving table, one end of which is connected to a center of gravity of the vehicle, and the other end of which is vertically movably supported by a frame standing sideways of the vehicle on the test table. A connecting rod, a tension detecting means provided on the connecting rod, an up-down adjusting actuator capable of adjusting the vertical position of the other end of the connecting rod, a horizontal detector for detecting a horizontal state of the connecting rod, A roll characteristic testing device for a vehicle, comprising: a controller for maintaining the horizontal state of the connecting rod by operating the actuator for vertical adjustment by the output of a horizontal detector. 2. A test apparatus for measuring a roll characteristic of a vehicle on a test table, wherein the vehicle is mounted on the test table, and a movable table is provided so as to be movable along the lateral direction of the vehicle with respect to the test table. A drive actuator that reciprocates the moving table, a control device that controls the drive actuator to reciprocate the moving table at a predetermined speed, and a drive actuator that is provided between the moving table and a vehicle tire. A roll characteristic testing device for a vehicle, comprising: load detecting means for detecting a vertical load acting on each tire.