JP2562038B2 - Brake test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Purpose of the Invention (1) Field of Industrial Application The present invention relates to a brake test apparatus, and particularly to a brake test apparatus suitable for performing a plurality of brake tests corresponding to vehicles having different drive systems. Regarding

(2) Conventional Technology Recently, a plurality of types of vehicles are assembled on the same production line, and even vehicles of the same type have different drive systems. Therefore, it is necessary to perform testing of a plurality of types of vehicles and vehicles of the same type with different drive systems on the same line in the vehicle testing line. Furthermore, recently, vehicles of the type that always drive four wheels have also been produced.

Conventionally, a brake test for measuring the braking force of a brake of a four-wheel drive vehicle has been performed as follows. For a four-wheel drive vehicle in which two-wheel drive and four-wheel drive can be manually selected, the front wheel and the rear wheel are connected by a joint mechanism, and the two-wheel drive and four-wheel drive provided in the driver's seat are selected. It was released by manually operating the switch lever. By releasing the connection by the joint mechanism, it is possible to prevent the front wheel and the rear wheel from being driven by each other, and then the braking force is measured and a brake test is performed. Further, the constant four-wheel drive vehicle using the high-density fluid coupling is not provided with a switch lever. Therefore, the coupling between the front wheels and the rear wheels is forcibly released by an emergency switching device provided in the engine room, or the coupling mechanism is removed from the vehicle, and the front wheels and the rear wheels are connected to each other. After making the secondary rotation of No. 1 occur, the braking force was measured and a brake test was conducted.

Next, a conventional brake test operation for performing the brake test will be described.

FIG. 8 is a diagram showing a conventional brake test apparatus for simultaneously measuring the braking force of a brake provided on each wheel, two wheels at a time. With this brake testing device, four-wheel drive vehicle 01
When measuring the braking force of the brake, first of all, it is a four-wheel drive vehicle.
01 is made to enter at a right angle to the rotation axis of the measuring rollers 03, 04 arranged on the floor 02, and the front wheel 05 is stopped at the position supported by the measuring rollers 03, 04 (the position shown by the chain double-dashed line in the figure). .
Then, the transmission of the vehicle 01 is set to the neutral state, and the joint mechanism between the front wheels 05 and the rear wheels 06 is released by the procedure described above. Next, the measurement rollers 03, 04 are rotated, a pedal force is applied to the brake pedal, the coefficient of frictional resistance between the front wheel 05 and the measurement roller is maximized, and the regular braking force of the brake is measured. After the measurement of the front wheels 05 is completed and the rotation of the measurement rollers 03, 04 is stopped, the vehicle 01 is moved forward and the rear wheels 06 are set to the measurement rollers.
Stop at the position supported by 03, 04 (the position shown by the solid line in the figure). Then, as in the case of the front wheels 05, the rear wheels
The braking force of the brake installed in 06 is measured.

FIG. 9 is a diagram showing a conventional brake test apparatus for simultaneously measuring the braking force of the brakes provided on each of the four wheels. When measuring the braking force of the brake of the four-wheel drive vehicle 01 with this brake test device, first, the four-wheel drive vehicle 01
The measurement rollers 07 to 010 at right angles to the axis of rotation,
The front wheel 05 is supported by the measuring rollers 07 and 08,
The rear wheel 06 is stopped at a position supported by the measuring rollers 09, 010 (position shown by a solid line in the figure). Then, the transmission of the vehicle 01 is set to the neutral state, and the joint mechanism between the front wheels 05 and the rear wheels 06 is released by the above-described operation. next,
Rotate the measuring rollers 07 to 010 and apply the pedal force to the brake pedal to maximize the friction resistance coefficient of the front wheels 05 and measuring rollers 07,08 and the rear wheels 06 and measuring rollers 09,010 respectively.
The braking force of each brake provided on 05 and the rear wheel 06 is measured.

By the way, when performing a brake test of a four-wheel drive vehicle conventionally, the reason for releasing the connection between the front wheels and the rear wheels as described above is as follows. That is, when the brake test is performed without considering the drive system without disconnecting the front wheels and the rear wheels from the joint mechanism of the four-wheel drive vehicle, the following problems occur.

In the case of the conventional brake test device shown in FIG. 8,
A pair of wheels different from the wheels located on the measurement rollers 03, 04 are stopped on the floor surface 02. Further, the front wheel 05 and the rear wheel 06 are in a state of mutually rotating via the joint mechanism. Therefore, the wheels stopped on the floor surface 02 are in the same state as when they are locked, and the wheels located on the measurement rollers 03, 04 are also in the same state as when they are locked.
Then, if the wheel being measured is locked, the phenomenon that the wheel moves rearward along with the measuring roller 04 and separates from the measuring roller 03 occurs before the regular braking force of the brake is measured. This is because the wheels are not locked by the braking force of the brake but are locked by the mutual rotation of the front wheels and the rear wheels. Therefore, in this case, there is a problem that the regular braking force of the brake cannot be accurately measured.

Further, in the case of the conventional brake test device shown in FIG. 9, the following problems occur. In a normal vehicle including a four-wheel drive vehicle and a two-wheel drive vehicle, there is a difference in braking force between the brakes provided on the front wheels and the brakes provided on the rear wheels. Therefore, when the brake is applied, there is a difference in the time of locking. If the front wheel 05 is locked first while measuring the braking force of the brake,
The front wheel 05 attaches to the measuring roller 08 and moves rearward. Then, the vehicle 01 floats up (the position indicated by the chain double-dashed line in the figure), and the rear wheel 06 also separates from the measuring roller 09. Therefore, the regular braking force of the brake provided on the rear wheel 06 cannot be accurately measured. Further, when the rear wheel 06 is locked first, the regular braking force of the brake provided on the front wheel 05 cannot be accurately measured for the same reason. It should be noted that these problems occur regardless of the difference in the drive system of the four wheels or the two wheels. Then, when the brake test is performed by the conventional brake test apparatus shown in FIG. 9 without releasing the joint mechanism between the front wheels and the rear wheels of the four-wheel drive vehicle, the mutual rotation of the front wheels and the rear wheels is suppressed. It becomes more difficult to accurately measure the braking force of the brake provided on each wheel due to the interference due to

(3) Problems to be Solved by the Invention As is apparent from the above description, the problems shown in FIGS.
In the conventional brake test apparatus shown in the figure, when measuring the braking force of the brake of a four-wheel drive vehicle, the connection between the front wheels and the rear wheels had to be released. Therefore, there is a problem in that work efficiency is poor because an operation for releasing is required. In particular, in a constant four-wheel drive vehicle using a high-density fluid coupling, the releasing operation is not easy because the releasing device is an emergency device provided in the engine room. Further, when performing a brake test on a two-wheel drive vehicle and a four-wheel drive vehicle on the same line, the four-wheel drive vehicle needs the operation for releasing the above-described release, and thus requires different operations depending on the drive system. Therefore, there is a problem that work efficiency is further deteriorated.

The present invention has been made in view of the above circumstances, and provides a brake test device capable of accurately measuring the braking force of a brake of a vehicle of a different drive system and improving work efficiency of a brake test. With the goal.

B. Structure of the Invention (1) Means for Solving Problems In order to achieve the above object, the brake test apparatus of the present invention has a structure shown in FIG. 1 which is a claim correspondence diagram. As shown in FIG. 1, the brake test apparatus of the present invention comprises measuring rollers R _{1 to} R ₄ contacting each wheel of a vehicle and a braking force detector connected to the shafts of the measuring rollers R _{1 to} R ₄ . in the brake test device having a D ₁ to D ₄ and the drive source M ₁ ~M ₄ such as an electric motor, for generating a motor drive signal S ₁ to S ₄ for instructing the rotation direction of the driving source M ₁ ~M ₄ and a control unit C, and a selection unit MPX output as the braking force detectors D ₁ to D ₄ of the braking force detection signal S ₅ to S ₈ measured signal S to select, provided to the each wheel brake Is tested based on the measurement signal.

Further, in the embodiment of the brake test apparatus of the present invention, the control means C causes the measuring rollers R ₁ and R ₂ that come into contact with the right wheel to contact.
And one of the measurement rollers R ₃ and R _{4 that} abut on the left wheel, rotate the drive sources M _{1 to} M _{4 so as} to rotate in the forward direction corresponding to the traveling direction of the vehicle and rotate the other in the reverse direction. The motor drive signals S _{1 to} S ₄ indicating the direction are output, and the selection means MP
X is configured to select the braking force detection signal of the braking force detector connected to the shaft of the measuring roller that is rotating normally as the measurement signal S.

(2) Operation The brake test apparatus of the present invention having the above-described configuration is configured so that the measurement rollers R _{1 to} R ₄ contacting each wheel of the vehicle and the braking force connected to the shafts of the measurement rollers R _{1 to} R _4. It has detectors D _{1 to} D ₄ and drive sources M _{1 to} M ₄ . Therefore, when the driving sources M _{1 to} M ₄ are rotated, the measuring rollers R _{1 to} R ₄ connected to the shaft also rotate, and thus the wheels of the vehicle also rotate. When operating the brake provided on each wheel of the vehicle, the braking force detectors D ₁ to D ₄ braking force detecting the braking force of the brake signal S ₅ to S ₈
Output as At this time, the drive sources M _{1 to} M ₄ are controlled by the control means C which generates motor drive signals S _{1 to} S ₄ indicating the rotation direction, and at that time, the measuring roller R ₁ suitable for the drive system is used. ~ R ₄ rotation direction is specified.

Further, the braking force detection signals S ₅ ~ of the braking force detectors D ₁ ~ D ₄ ~
S ₈ is selected by the selection means MPX and output as the measurement signal S. Therefore, only the detection signal of the braking force detector that detects the braking force is output as the measurement signal S.

Further, in the brake test apparatus according to the embodiment of the present invention having the above-mentioned configuration, the control means C is the measuring rollers R ₁ and R ₂ that contact the right wheel and the measuring roller R ₃ that contacts the left wheel.
The drive sources M _{1 to} M ₄ are arranged so that one of R ₄ is rotated in the forward direction corresponding to the forward direction of the vehicle and the other is rotated in the reverse direction.
The motor drive signals S _{1 to} S ₄ for instructing the rotation direction are output. Therefore, due to the action of the differential mechanism provided between the drive shaft connected to the right wheel and the drive shaft connected to the left wheel, no rotational force is applied to the joint mechanism that connects the front wheels and the rear wheels. I can't.
Therefore, the front and rear wheels of the four-wheel drive vehicle do not rotate. Then, the selecting means MPX selects, as the measurement signal S, the braking force detection signal of the braking force detector connected to the shaft of the normally rotating measuring roller. Therefore, only the braking force detection signal of the braking force detector that detects the regular braking force (the braking force of the wheel that rotates in the forward direction) is output.

(3) Examples Hereinafter, examples of the present invention will be described with reference to the drawings.

In the figure, the X ₁ direction is the front, the X ₂ direction is the rear, the Y ₁ direction is the left, and the Y ₂ direction is the right.

2 to 5 are views showing the construction of an embodiment of the brake test apparatus according to the present invention, FIG. 2 is a plan view of the mechanical construction, FIG. 3 is a side view thereof, and FIG. FIG. 4 is a diagram showing a relationship with a drive mechanism of four-wheel drive wheels of a vehicle to be tested, and FIG. 5 is a diagram showing a hardware configuration of a computer U for controlling the mechanical configuration. In this embodiment, the computer U realizes each function of the control means C and the selection means MPX shown in FIG.

2 and 3, the measuring roller R ₁ supporting the right front wheel Fr of the vehicle B is composed of a pair of measuring rollers 1 and 2, and the measuring roller R ₂ supporting the right rear wheel Rr is a pair of measuring rollers 3 The measuring roller R ₃ is composed of a pair of measuring rollers 5 and 6, and the left rear wheel R supports the left rear wheel Fl.
The measuring roller R ₄ supporting l is composed of a pair of measuring rollers 7, 8. Each of the measuring rollers 1 to 8 has a cylindrical shape, and a plurality of long grooves for approximating the friction coefficient between the tire of the vehicle and the road surface are formed in the longitudinal direction of the outer peripheral portion. These front wheel measuring rollers R ₁ and R ₃ and rear wheel measuring rollers R
₂ and R ₄ are provided on the machine frame 9 and the adjustment slide base 10 (see FIG. 3) so as to support the front wheels Fr, Fl and the rear wheels Rr, Rl of the vehicle B, respectively. Also, front right wheel measuring roller R ₁
Gears 11 and 12 are respectively provided at the left end portions of the shafts of the pair of measuring rollers 1 and 2 constituting the above, and the measuring rollers 1 and 2 are synchronously rotated by a chain 13 which is a power transmission member. Has been done. A motor M _{1 as} a drive source is connected to the right end of the shaft of the measuring roller 1 via a braking force detector D ₁ and a gear 16, a chain 17, and a gear 18. Although not shown, the measurement rollers R ₂ , R ₃ and R ₄ are also configured in the same manner as the measurement roller R ₁ described above, and the braking force detectors D ₂ , D ₃ and D ₄ and the drive sources are respectively provided. Motors M ₂ , M ₃ and M ₄
Is provided. Between the pair of measuring rollers, lifts 22 to 25 are lifted up and down by cylinders 20 and 21 (see FIG. 3).
(See FIG. 2) are provided. And the lift 22 ~
Fall prevention rollers 26-33 are located at positions close to both ends of 25.
It is rotatably installed around the vertical axis. Further, outside the fall prevention rollers 28, 30, 32, the vehicle body detection sensors 34 to 36 are provided.
Is provided. Although not shown, the fall prevention roller
A vehicle body detection sensor is also provided on the outside of 26 in the same manner. Further, as shown in FIG. 3, stoppers 37 and 38 are provided on the rear side of the rear wheel measuring rollers R ₂ and R ₄ and cylinders 39 and 39, respectively.
It is provided so that it can project upward by (only one is shown). Each of the above-mentioned members related to the front wheels of the test vehicle B, that is, the measurement rollers 1, 2, 5, 6 and the lifts 22 and 24, the fall prevention roller 2
Machine frame 9 with 6,27,30,31 and vehicle body detection sensor 35
Is fixed to the machine base 40 (see FIG. 3). Also, the above-mentioned members related to the rear wheels of the test vehicle, that is, the measuring roller.
3,4,7,8, elevator 23,25, fall prevention rollers 28,29,32,33,
The adjustment slide base 10 provided with the vehicle body detection sensors 34, 36 and the stoppers 37, 38 moves on a rail 41 provided on the machine base 40 (see FIG. 3). Further, the adjustment slide base 10 is provided with a sleeve 42. A feed screw 44 rotated by a motor 43 is screwed into the sleeve 42. The arrow X ₁ indicates the traveling direction of the vehicle on the test line.

In FIG. 4, each wheel Fr, Fl, Rr, Rl is a measuring roller R.
Supported by _{1 to} R ₄ . Differential gears 49 and 50, which are differential mechanisms, are provided between the drive shafts 45 and 47 and the drive shafts 46 and 48. The differential gears 49, 50 are left side gears 51, 52 connected to the drive shafts 45, 47, right side gears 53, 54 connected to the drive shafts 46, 48, differential pinions 55 to 58, differential cases 59, 60, and ring gears. It is composed of 61 and 62.
The joint mechanism 63 is composed of drive pinions 64 and 65 meshing with the ring gears 61 and 62, a joint shaft 66, a high-density fluid joint 67, and the like.

In FIG. 5, a CPU 68 for performing various calculations, a RAM 69 for temporarily storing data and the like, a ROM 70 for storing programs and fixed data, an input / output interface 71, and a CRT controller 72 are connected by a bus 73. The CRT
The controller 72 writes the display data sent via the bus 73 in the display memory 74. The display data read from the display memory 74 is converted into a character pattern signal by the character generator 75 and displayed on the CRT 76. Further, the input / output interface 71 inputs / outputs the following signals S _{1 to} S ₁₃ . That is, (1) a motor drive signal S ₁ that indicates the rotation direction of the motor M ₁ that is the drive source of the measurement roller R ₁ corresponding to the right front wheel Fr, and (2) drive of the measurement roller R ₂ corresponding to the right front wheel Rr. A motor drive signal S ₂ that indicates the rotation direction of the motor M ₂ that is the source, (3) A motor drive signal S ₃ that indicates the rotation direction of the motor M ₃ that is the drive source of the measurement roller R ₃ corresponding to the right front wheel Fl , (4) Motor drive signal S ₄ that indicates the rotation direction of the motor M ₄ that is the drive source of the measurement roller R ₄ corresponding to the right front wheel Rl, (5) The braking force detector D ₁ corresponding to the right front wheel Fr Right front wheel braking force detection signal S ₅ , (6) Braking force detector D ₂ corresponding to right front wheel Rr, right rear wheel braking force detection signal S ₆ , (7) Braking force detector D ₃ corresponding to right front wheel Fl the left front wheel braking force detection signal S _7, (8) the left rear wheel braking force of the braking force detector D ₄ corresponding to the right front wheel Rl detection signal S _8, (9 Signal S ₉ of the keyboard 77, (10) movement signal S ₁₀ of the control slide base 10, (11) the vehicle body detected signal S ₁₁ of the body detecting sensor 34 to 36, the drive signal S ₁₂ (12) stoppers 37 and 38, ( 13) Elevating signal that raises and lowers elevators 22 to 25 at the same time
S ₁₃ .

Next, the operation of the embodiment of the present invention having the above-described structure will be described based on the flowcharts of FIGS. First, in step 101, the vehicle type is specified by the keyboard 77. Next, it is determined whether or not the vehicle type designated in step 102 is the A vehicle. If the vehicle is the A vehicle, the process proceeds to step 104.
If it is not car A, proceed to step 103. In step 103, it is determined whether or not the vehicle type designated is the B vehicle. If the vehicle is the B vehicle, the process proceeds to step 105. If it is determined in step 103 that the vehicle is not the B vehicle, the designated vehicle type is neither the A vehicle nor the B vehicle, so the process returns to step 101 and the designation is performed again. In step 104, the movement signal S ₁₀ is output so that the adjustment slide base 10 moves to the designated position corresponding to the A vehicle corresponding to the wheel base of the A vehicle. Then, the feed screw 44 is rotated by the motor 43. Therefore, the adjustment slide base 10 provided with the nut sleeve 42 is moved on the rail 41,
The measuring rollers R _{1 to} R ₄ are arranged so as to support the wheels Fr, Fl, Rr, Rl of the A car. Further, in step 105, similar processing is performed corresponding to car B. Then step 106
Use the keyboard 77 to specify the mode. Step 10
At 7, it is determined whether or not the test mode 1 for performing the test suitable for the four-wheel drive vehicle is designated. If the test mode is 1, the process proceeds to step 109. If the test mode is not 1, the process proceeds to step 108. In step 108, it is determined whether or not the test mode 2 for performing the test suitable for the two-wheel drive vehicle is designated. If it is the test mode 2, proceed to step 126. If it is determined in step 108 that the test mode is not 2, the specified test mode is neither test mode 1 nor test mode 2. Therefore, the process returns to step 106 and the test mode is specified again.

Steps 109 to 125 shown in FIGS. 6B and 6C show processing suitable for a brake test of a four-wheel drive vehicle. The wheels Fr, Fl, Rr, Rl of the vehicle B that have proceeded along the test line (see FIGS. 2 and 3) in the direction of the arrow X ₁ are seated on the lifts 22 to 25. Then, in step 109, the sensor signal S ₁₁ from the vehicle body detection sensors 34 to 36 is input. In step 110, it is determined from the sensor signal S ₁₁ whether the vehicle B is in the regular test position, and if it is in the regular position, the process proceeds to step 111. If the vehicle is not in the proper position, the position of the vehicle is adjusted, the process returns to step 109, the sensor signal S ₁₁ is input again, and the determination in step 110 is performed again. If the vehicle is in the proper position, stop 37, 38
The drive signal S _{12 of} is output. Then, the cylinder 39 is extended, and the stoppers 37 and 38 are extended as shown by the chain double-dashed line in FIG.
The rear wheels Rr and Rl are lifted to the rear. In step 112, the lifting signal S ₁₃ is output so that the lifting platforms 22 to 25 are lowered. Then, the cylinders 20 and 21 are driven, and the lifts 22 to 25 are lowered. Therefore, the measuring rollers R _{1 to} R ₄ are connected to the wheels Fr, F of the vehicle B.
It abuts l, Rr, Rl and supports each wheel. Then step 113
Then, the motor drive signals S _{1 to} S ₄ indicating the rotation directions of the motors M _{1 to} M ₄ which are the drive sources of the measurement rollers corresponding to the wheels Fr, Fl, Rr, Rl are output. At this time, the motor drive signals S ₂ , S ₃
Indicates forward rotation, and motor drive signals S ₁ and S ₄ indicate reverse rotation. Therefore, when each measuring roller rotates in the instructed direction, the left front wheel Fl and the right rear wheel Rr make a positive rotation corresponding to the traveling direction of the vehicle B, and the right front wheel Fr and the left rear wheel Rl have the same speed and reverse. Rotate. At this time, as shown in FIG. 4, the left front wheel Fl
The drive shaft 45 is provided with the left side gear 51 of the differential gear 49, and the drive shaft 46 of the right front wheel Fr is provided with the right side gear 53. for that reason,
Since the left side gear 51 rotates in the forward direction and the right side gear 53 rotates in the reverse direction, the rotational forces applied to the differential pinion, 55 and 56 are equal to each other. And the differential pinion 55, 56 is the left side gear 5
With respect to 1,53, the ring gear 61 provided in the differential case 59 is rotated without changing its position, and thus no rotational force is applied. Therefore, no rotational force is applied to the drive pinion 64 meshed with the ring gear 61, so that the joint mechanism 63 is not rotated. Further, the differential gear 50 provided between the rear wheels Rr, Rl also operates in the same manner as the differential gear 49 on the front wheel side, so no rotational force is applied to the drive pinion 65, so the joint mechanism 63 rotates. Not done. Therefore, there is no subordinate rotation or interference between the front wheels Fr, Fl and the rear wheels Rr, Rl.

Next, at step 114, the vehicle brake is activated.
At this time, the brakes provided on the left front wheel Fl and the right rear wheel Rr, which are rotating forward, generate a regular braking force (braking force when the vehicle is moving forward). Therefore, the left front wheel braking force detection signal S ₆ and the right rear wheel braking force detection signal S ₇ of the braking force detectors corresponding to the left front wheel Fl and the right rear wheel Rr detecting the regular braking force are sent to the computer U. Input and store as measurement signal data. When the braking force detection signals S ₆ and S ₇ are input, step 115
Then, since the motor drive signals S _{1 to} S ₄ instruct the motors M _{1 to} M ₄ to stop, the rotations of the measuring rollers 1 to 8 stop.

Then, in step 116, the motor drive signals S ₁ and S ₄ instruct forward rotation, and the motor drive signals S ₂ and S ₃ instruct reverse rotation. In this case as well, similar to step 113, there is no sub-rotation or interference between the front wheels Fr, Fl and the rear wheels Rr, Rl. At step 117, the right front wheel braking force detection signal of the braking force detector corresponding to the right front wheel Fr and the left rear wheel Rl which are detecting the regular braking force at this time.
S ₅ and the left rear wheel braking force detection signal S ₈ are sent to the computer U.
, And store it as measurement signal data. When the braking force detection signals S ₅ and S ₈ have been input, the motor drive signals S _{1 to} S ₄ instruct the motors M _{1 to} M ₄ to stop in step 118, so that the measurement rollers R _{1 to} R ₄ are not rotated. Stop. When performing the processing of steps 113 to 118, the left and right wheels rotate at the same speed and in opposite directions. Therefore, during the brake test, the lifting of the vehicle from the measuring roller due to the locking of the wheels or the like is unlikely to occur because the forces attempting to float are opposite in the left and right directions. Also, even if the force of uplift occurs,
Since the stoppers 37, 38 project to the rear of the rear wheels Rr, Rl in step 111, the vehicle will not come off the measuring roller. Further, since the fall prevention rollers 26 to 33 are provided, even if the vehicle swings in the left-right direction, it does not deviate from the measurement roller.

Next, in step 119 shown in FIG. 6C, the motor drive signals S _{1 to} S ₄ indicate forward rotation. And step 120
Then, the side brake is operated, and the braking force detection signals S ₆ and S ₈ of the detectors corresponding to the rear wheels Rr and Rl that detect the braking force of the side brake are input and stored as measurement signal data. In this case, it is assumed that the braking force of the side brake is applied only to the rear wheels. When the braking force detection signals S ₆ and S ₈ are input, the motor drive signals S _{1 to} S ₄
Causes the measurement roller to stop rotating. In step 122, the measurement signal data stored in steps 114, 117, and 120 are processed to determine the test result. This processing is performed, for example, by converting the measurement signal data into a braking force and comparing it with the previously stored data corresponding to the vehicle weight. This is because the magnitude of the required braking force differs depending on the vehicle weight. Further, the braking forces of the brakes provided on the left and right wheels are compared. And
If the predetermined conditions are satisfied as a result of these comparisons, the test result is determined to be acceptable. Then, in step 123, the test result is displayed. An example of this display is shown in FIG. In FIG. 7, the display of the part without underline is predetermined fixed data, which is read from the ROM 70 by the instruction of the CPU 68, written in the display memory 74 through the CRT controller 72, and then by the character generator 75. It is converted to a character pattern signal and displayed on the CRT76. On the other hand, the underlined display is variable data, and the display indicating the vehicle type is the data designated in step 101. The display "○○○" indicating the weight of the vehicle, that is, the vehicle weight, is obtained by reading the vehicle weight data corresponding to the vehicle type designated in step 101 from the ROM 70 and displaying it. Further, the display "***" showing the braking force of each brake is obtained by converting the measurement signal data. The display “ΔΔΔ” showing the total braking force and the display “ΔΔΔ” of the braking force difference between the left and right front wheels and the rear wheels are the results of processing the measurement signal data. The determination display "OK" is a display showing the test result. Display the above and perform Step 123
Processing ends and proceeds to step 124. In step 124, the stopper drive signal S ₁₂ of the stoppers 37, 38 instructs the lowering, so that the stoppers 37, 38 lower. Then in step 125,
Since the lifting signal S ₁₃ instructs the lifting, the lifting tables 22 to 25
Goes up and vehicle B can move in the direction of arrow X ₁ .

With the above processing, the brake test suitable for the four-wheel drive vehicle is completed.

Further, steps 128 to 142 show processing suitable for a brake test of a two-wheel drive vehicle. Step
At 128, the drive signal S ₁₂ for the stoppers 37, 38 is output to raise the stoppers 37, 38. In step 129, the lifting signal S ₁₃ is output to lower the lifting platforms 22 to 25. Step 128
The operations in and step 129 are similar to those in step 111 and step 112, respectively. Next, in step 130, the motor drive signals S ₁ and S ₃ instructing the rotation of the motors M _{1 to} M ₄ that are the drive sources of the measurement rollers are output so that the motors M ₁ and M ₃ rotate in the forward direction.
Then, the left and right front wheels Fr, Fl rotate in the forward direction corresponding to the traveling direction X _{1 of the} vehicle. Then, in step 131, the left and right front wheels that operate the vehicle brakes to detect the regular braking force
Braking force detection signals of braking force detectors D ₁ and D ₃ corresponding to Fr and Fl
Input S ₅ and S ₇ and store as measurement signal data. At that time, the regular braking force of the left and right front wheels Fr, Fl (the braking force when the wheels are rotating in the forward direction) is measured. During the measurement, the left and right front wheels Fr, Fl lock and float on the measuring rollers 1, 5, and the left and right rear wheels Rr, Rl follow the measuring rollers 3, 7 accordingly.
Even if the vehicle floats up, the braking force detection signals S ₆ and S ₈ of the braking force detectors corresponding to the left and right rear wheels Rr and Rl are not input. Therefore, an inaccurate rear wheel braking force detection signal is not input. When the braking force detection signals S ₅ and S ₇ are input, in step 132, the motor drive signals S ₁ and S ₃ instruct the motors M ₁ and M ₃ to stop. F
Also stop r and Fl. Next, at step 133, the motor drive signal S ₂ ,
S ₄ is output so as to instruct the motors M ₂ and M ₄ to rotate normally.
Therefore, the left and right rear wheels Rr, Rl make forward rotation corresponding to the traveling direction X _{1 of the} vehicle. Then, in step 134, the brakes of the vehicle are actuated, and the left and right rear wheels Rr, R that detect the normal rotational force
The braking force detection signals S ₆ and S ₈ of the braking force detector corresponding to l are input and stored as measurement signal data. At this time, even if the vehicle lifts, the braking force detection signal for the front wheels is not input by the same operation as in step 131. When the braking force detection signals S ₆ and S ₈ have been input, the motor drive signals S ₂ and S ₄ instruct to stop the motors M ₂ and M ₄ in step 135, so the measurement rollers stop, so the left and right rear wheels Rr , Rl also stops.

Next, in step 136 of FIG. 6C, the motor drive signal S
₂ and S ₄ output a signal to rotate forward again. Then, in step 137, the side brake is operated to input the braking force detection signals S ₆ and S ₈ of the braking force detectors corresponding to the left and right rear wheels Rr and Rl which detect the braking force of the side brake, and the measured values. It is stored as signal data. When the braking force detection signals S ₆ and S ₈ have been input, in step 138 the motor drive signals S ₂ and S ₄ are output to the motor.
Since M ₂ and M ₄ are instructed to stop, the measurement rollers also stop, so the left and right rear wheels Rr and Rl also stop. In step 139, the data stored in steps 131, 134, and 137 is processed to determine the test result. Then, in step 140, the test results are displayed. The processing in step 139 and step 140 is the same as the processing in step 122 and step 123, respectively. When the display processing in step 140 ends, in step 141, the drive signals S ₁₂ of the stoppers 37, 38 instruct to descend, so that the stoppers 37, 38 descend. Next, at step 142, the ascending / descending signal S ₁₃ instructs the ascending, so that the ascending / descending platforms 22 to 25 ascend and the vehicle B can proceed in the direction of the arrow X ₁ . With the above processing, the brake test suitable for the two-wheel drive vehicle is completed.

Next, the effect peculiar to the above-described embodiment of the present invention will be described.
According to the above-described embodiment of the present invention, since the adjustment slide base 10 moves to the position corresponding to the wheel bases of various vehicles, it is possible to perform the brake test of various vehicles having different wheel bases on the same line. . Further, during the test, the stoppers 37 and 38 project to the rear part of the rear wheel, so that the vehicle can be prevented from rising. Further, since the fall prevention rollers 26 to 33 are provided, even if the vehicle swings in the left-right direction, it is possible to prevent the fall prevention rollers from being separated from the measurement roller. Then, by displaying the test result on the CRT, the test result can be easily confirmed.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. Is.

For example, when performing a brake test on a two-wheel drive vehicle,
In step 130, the motor drive signals S ₁ and S ₃ indicate forward rotation, in step 131, the braking force detection signals S ₅ and S ₇ are input, and in step 133, the motor drive signals S ₂ and S 3 are input. ₄ indicates the forward rotation, and instead of inputting the braking force detection signals S ₆ and S ₈ in step 134, in step 130 the motor drive signal S ₂ ,
S ₃ instructs forward rotation, and in step 131, the braking force detection signal S
₆ and S ₇ are input, the motor drive signals S ₁ and S ₄ indicate forward rotation in step 133, and the braking force detection signals S ₅ and S ₈ are input in step 134.
Can be input, and in step 130, the motor drive signals S ₁ and S ₂ indicate forward rotation, and in step 131,
The braking force detection signals S ₅ and S ₆ are input, the motor drive signals S ₃ and S ₄ direct forward rotation in step 133, and the braking force detection signals S ₇ and S ₈ are input in step 134. It is possible.

When performing a brake test of a four-wheel drive vehicle, in step 113, the motor drive signals S ₂ and S ₃ indicate forward rotation, and the motor drive signals S ₁ and S ₄ indicate reverse rotation. At 114, input the braking force detection signals S ₆ and S _7, and
At 116, the motor drive signals S ₁ and S ₄ direct forward rotation, and the motor drive signals S ₂ and S ₃ direct reverse rotation, and at step 117,
Instead of inputting the braking force detection signals S ₅ and S ₈ , step 113
, The motor drive signals S ₁ and S ₂ indicate forward rotation, the motor drive signals S ₃ and S ₄ indicate reverse rotation, and in step 114, the braking force detection signals S ₅ and S ₆ are input, At 116, the motor drive signals S ₃ and S ₄ indicate forward rotation, and the motor drive signals S ₁ and S ₂ indicate reverse rotation, and at step 117, the braking force detection signals S ₇ and S ₈ are input. Is possible.

Further, in the embodiment, although it corresponds to two vehicle types having different wheel bases, a process of determining whether or not the vehicle type is the third vehicle type is added after the step 3, and then the step 4 is performed. By adding processing, it can be applied to three types of vehicles. Similarly, 4 with different wheel bases
It can be applied to more than vehicle types.

Further, in the embodiment, there are two test modes,
Similar to the case of the car model, it can support three or more test modes.

Further, instead of configuring the control means C and the selection means MPX by the function realizing means by the computer, another sequence control device can be used.

Furthermore, instead of using the CRT, another display device, for example, a liquid crystal display or a plasma display can be used, and an indicating device such as a meter can also be used.

C. As the effects foregoing invention, the brake testing device of the present invention, the driving source M ₁ ~M ₄ is controlled by the control means C for generating a motor drive signal S ₁ to S ₄ for instructing the rotational direction . Therefore, the rotation directions of the measuring rollers R _{1 to} R ₄ suitable for the driving system of the vehicle are instructed. Therefore, a brake test suitable for a plurality of drive systems can be efficiently performed.

Further, the braking force detection signal S ₅ to S ₈ of the braking force detectors D ₁ to D ₄ and selected by the selection means MPX, and outputs as a measurement signal S. Therefore, only the detection signal of the braking force detector that detects the regular braking force is output as the measurement signal S.
Therefore, an accurate test can be performed.

[Brief description of drawings]

FIG. 1 is a diagram of a brake test apparatus according to the present invention, which corresponds to claims,
2 and 3 are a plan view and a side view of a mechanical structure of an embodiment of a brake test apparatus according to the present invention, and FIG. 4 is a drive mechanism of a four-wheel drive vehicle for testing with the brake test apparatus. FIG. 5 is a diagram showing the relationship of the hardware of a computer that controls the mechanical configuration of the brake test apparatus, and FIGS. 6 (a), 6 (b) and 6 (c) are the software. FIG. 7, FIG. 7 is an example of a screen displaying test results, and FIGS. 8 and 9 are conventional explanatory views. R _{1 to} R ₄ …… Measuring roller, D _{1 to} D ₄ …… Braking force detector, M ₁ to
M ₄ …… Drive source, S _{1 to} S ₄ …… Signal for instructing the rotation direction, C
...... Control means, S _{5 to} S ₈ …… Brake force detection signal, S …… Measurement signal, MPX …… Selection means

Claims (2)

(57) [Claims] 1. A measuring roller (R _1-) contacting each wheel of a vehicle.
And R _4), in the brake testing device and a said measuring roller (R ₁ ~R ₄₎ braking force detector coupled to the shaft of the (D ₁ ~D ₄₎ and a drive source (M ₁ ~M _4), the drive source and (M ₁ ~M ₄₎ instructing signal the direction of rotation of the (S ₁ ~S ₄₎ control means for generating (C), said braking force detection of the braking force detectors (D ₁ ~D ₄₎ And a selection means (MPX) for selecting signals (S _{5 to} S ₈ ) and outputting them as measurement signals (S), for testing the braking force of the brakes provided on the respective wheels, the measurement signals (S) Brake test equipment characterized by being performed based on 2. The control means (C) has _{one of} the measuring rollers (R ₁ , R ₂ ) contacting the right wheel and _{one of} the measuring rollers (R ₃ , R ₄ ) contacting the left wheel, respectively. A signal (S ₁ ~) for instructing the rotation direction to the drive sources (M ₁ ~ M ₄ ) so that the forward rotation corresponding to the traveling direction of the vehicle is performed and the other rotation is performed in the reverse direction.
S ₄ ) is output, and the selection means (MPX) is configured to select the braking force detection signal of the braking force detector connected to the shaft of the measuring roller that is rotating forward as the measurement signal (S). The brake testing device according to claim 1.