JPS62209334A - Apparatus for fixing vehicle - Google Patents

Abstract

PURPOSE:To make it possible to measure true or almost true running driving force, by providing a buffer fixing mechanism for fixing a vehicle to be tested in a buffering state and the detection member mounted to the buffer fixing mechanism and capable of detecting the forward and backward force of the vehicle to be tested applied to the buffer fixing mechanism. CONSTITUTION:A vehicle 21 to be tested is supported by or fixed to a buffer fixing mechanism 22 in a buffering state. The running driving force of the vehicle 21 to be tested on a rotary roller 20 is directly detected by a detection member 23 from the car body of the vehicle 21 to be tested through a receiving plate 24. For example, when the vehicle 21 to be tested runs on the rotary roller of a tester, if the forward and backward force of the vehicle 21 to be tested exceeds the spring force of the elastic member 27 of the buffer fixing mechanism 22, the detection member 23 is operated. The pressure to the receiving plate 24 detected at this time by the detection member 23 is not the true forward and backward force of the vehicle 21 to be tested because the elastic member 27 acts. Then, the spring force of the elastic member is subtracted from the forward and backward force, which is measured by the detection member 23, by a pressure detecting operation circuit 28 and the true or almost true forward and backward force of the vehicle 21 to be tested on the rotary roller 20 is obtained to be displayed on a display device 29.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a vehicle fixing 5A system for fixing a vehicle to be tested riding on a rotating roller of a vehicle testing device capable of performing running tests on vehicles, and particularly to The present invention relates to a vehicle fixing device that can detect longitudinal force of a vehicle.

``Prior Art'' Conventionally, as a vehicle fixing device U for fixing a vehicle under test riding on a rotating roller of a vehicle testing device such as a chassis dynamometer, speedometer tester, brake tester, etc., for example, as shown in FIGS. 1 to 3, There were examples as shown.

That is, 1 shown in FIG. 1 is a vehicle fixing device that fixes the idle wheels 3 of the tested vehicle 2 whose driving wheels are on the rotating rollers of the vehicle testing device to the floor surface F of the test chamber. A vehicle holder 4 which is fixedly placed on the floor surface F and supports the tread surface of the idler wheel 3, and a screw rod having one end pivotally supported by the vehicle holder 4 and having a male screw 5 at the other end ^I. 6, a holding member 8 having a plurality of wheel holding arms 7.7 attached to the screw rod 6 in an adjustable manner, and a nut 9 with which the holding member 8 can be fixed at any position. It is configured. Further, 1A shown in FIG. 2 is a vehicle fixing device that holds the tested vehicle 2, which has at least one of its wheels on the rotating row 510 of the vehicle testing device, by tensioning it with a cable member 11 such as a wire or chain. Vehicle fixing device 1
A cable member fastener 12 such as a turnbuckle is interposed at an appropriate location on the cable member 11 of A. Furthermore, the third
1B shown in the figure is a so-called barricade type vehicle fixing device. The stopper piece 14 protrudes from the front wall of the fixed block 13 and receives and stops the body of the vehicle under test 2.

Therefore, each of the conventional embodiments 1.1A and 1B has the sole purpose of preventing the vehicle under test 2 from jumping out, and focuses on how to securely and securely fix the vehicle under test. It has been developed separately.

Therefore, while the above-mentioned embodiment only has the function of fixedly fixing the vehicle, it also has the disadvantage that the body of the vehicle with a flexible structure may be damaged or damaged by the longitudinal force generated when the vehicle under test accelerates or decelerates. Ta.

On the other hand, when measuring the running driving force of the vehicle under test 2, as shown in FIG. The detector 16 is mainly composed of a dynamometer 19 provided via a flywheel 18, and the roller 15 is rotated by the drive wheel 17 of the vehicle under test.
The running driving force on the circumferential surface of 15 was detected by the rotary torsional torque detector 16.

However, in the detection method using the chassis dynamometer A, when the driving wheels 17 of the test vehicle drive the circumferential surface of the roller 15, first the roller 15, which occupies a very large element in the inertia a, This causes a force to be applied to the torque meter etc. after the roller 15 starts rotating.

Therefore, as a practical matter, the waveform and value of the driving force in the transient state have little meaning, in other words, they are of no more use than relative comparative values. In addition, there is also the problem that vibration waveforms are superimposed due to the mutual exchange of energy between the inertial bodies on the input side and output side of a torque meter, etc., and measurement with a torque meter etc. cannot be used as is, and various Even if electrical signal processing and arithmetic processing were performed, problems remained in the reliability of the numerical values and the method of confirmation and verification.

"Problems to be Solved by the Present Invention" In view of the above-mentioned conventional drawbacks, the present invention provides a test vehicle! ! It is possible to prevent the vehicle body from being damaged or damaged by the longitudinal force generated when the two-component test vehicle accelerates or decelerates by firmly fixing it, and it is also possible to prevent the vehicle body from being damaged or damaged by the longitudinal force that occurs when the two-component test vehicle accelerates or decelerates.Also, it is not possible to use a method of fixing the idler wheels like in a four-wheel drive vehicle. It is possible to securely fix the vehicle to a vehicle, and in addition, the driving force in the longitudinal direction of the rotating rollers of the tested vehicle during running can be directly detected from the vehicle body, and the longitudinal force acting on the vehicle body can be detected. The object of the present invention is to obtain a vehicle fixing device that can measure true or close to true traveling driving force.

"Means for Solving the Problems" The vehicle fixing device of the present invention includes a buffer fixing mechanism for bufferingly fixing a vehicle to be tested riding on a rotating roller of a vehicle testing device, and a buffer fixing mechanism provided in the buffer fixing mechanism to and a detection member capable of detecting the longitudinal force of the vehicle under test applied to the buffer fixing mechanism.

"Embodiments of the present invention" The present invention will be described in detail below with reference to embodiments shown in the drawings.

FIG. 5 shows an example, and 1C is a rotating roller 20 of a speedometer tester, a brake tester, and a vehicle testing device.
This is a vehicle fixing device that cushions and supports a vehicle under test 21, in this embodiment a four-wheel drive vehicle, which is riding on a vehicle, and is capable of directly detecting the longitudinal force of the vehicle under test 21. The fixing device 1C is disposed at the front and rear of the vehicle under test 21, but the vehicle fixing device a provided at the front is omitted in the drawing.

This vehicle fixing device 1C includes a buffer fixing mechanism 22 that cushions or fixes the vehicle under test 21, and a buffer fixing mechanism 22 that detects the longitudinal force of the vehicle under test 21 that is applied to the buffer fixing mechanism 22. Detection member 2 that can
3, and the buffer fixing mechanism 22 is constructed of a vehicle under test 21.
A receiving plate 24 that comes into contact with a part of the vehicle body such as a bumper, and a fixed member having one end attached to a detection member 23 fixedly provided on the inner wall of the receiving plate 24 and the other end placed on the floor F. A rod 2G that slides horizontally within the block 25, and a spring that is wound around the outer circumference of the rod 26 between the detection member 23 and the fixed block 25 to always urge the detection member 23 toward the vehicle under test. It is composed of an elastic member 27. In this embodiment, the detection member 23 uses a pressure detector such as an electric load cell. A pressure detection calculation circuit 28 is connected to. 29 is connected to the pressure detection calculation circuit 28 and indicates the vehicle under test 21 calculated by the pressure detection calculation circuit 28.
This is an indicator that displays the true longitudinal force or the longitudinal force close to this.

In the above configuration, when the vehicle under test 21 accelerates or decelerates, the longitudinal force of the vehicle under test 21 is applied to the receiving plate 24, and the rod 26 is pushed in the direction of the arrow against the spring force of the elastic member 27. Therefore, the vehicle under test 21 is
2, it is supported or fixed in a cushioning manner. On the other hand, the running driving force on the rotating roller 20 of the vehicle under test 21 is transmitted from the body of the vehicle under test 21 to the detection member 23 via the receiving plate 24.
directly detected. For example, when the vehicle under test 21 is running on the rotating rollers 20 of the test device, the vehicle under test 2
When the longitudinal force of 1 exceeds the spring force of the elastic member 27 of the buffer fixing mechanism 22, the detection member 23 is activated. At this time, the pressure against the receiving plate 24 detected by the detection member 23 is not the true longitudinal force of the vehicle under test 21 because the spring force of the elastic member 21 acts on the detection member 23. Therefore, the spring force of the elastic member 27 is subtracted from the front and rear values measured by the detection member 23 in the pressure detection calculation circuit 28, and the
The true longitudinal force on the rotating roller 20 or close to the true longitudinal force can be obtained. Then, the value is immediately displayed on the display 29.

Next, a different embodiment of the present invention shown in FIG. 6 will be described. In the description of this embodiment, the same parts as in the embodiment of the present invention shown in FIG.

In the embodiment shown in FIG. 6, the main difference from the previous embodiment is a buffer fixing mechanism 22A.
4, one protruding end portion is attached to the detection member 23 fixedly provided on the inner wall of the receiving plate 24, and is fitted into the buffer pneumatic cylinder 30 fixedly provided on the floor surface F. The operating rod 31 is provided with a peripheral flange 32 at an appropriate location to slide on the inner wall of the cylinder 30.

Even with this configuration, the same functions and effects as in the embodiments of the present invention can be obtained.

"Effects of the Present Invention" As is clear from the above description, the present invention provides the following effects.

(1) The bumper, bumper stay, or part of the vehicle body of the vehicle under test can be supported or fixed as a buffer. Therefore, the body of the tested vehicle will not be damaged or damaged by the longitudinal force generated when the tested vehicle accelerates or decelerates.

(2) There is no need to restrain the wheels of the vehicle under test, so
To securely and easily fix a vehicle even in a vehicle such as a wheel drive vehicle in which the direction for fixing the driven wheels cannot be determined.

(3) The driving force in the longitudinal direction of the rotating roller of the vehicle to be tested during running can be directly detected from the body of the vehicle to be tested by the detection member. In an embodiment in which a pressure detection arithmetic circuit is connected to the detection member, it is possible to directly measure the true driving force acting on the vehicle body of the vehicle under test, or the driving force close to this. To explain this point roughly, like a conventional chassis dynamometer, each member that makes up the device, such as rollers, is an object that is different from the vehicle under test, in other words, the purpose of the test is It is superior to the torque meter detection method because it eliminates effects such as those caused by unrelated objects, and can measure the true or close driving force acting on the vehicle body under test. can.

(4) The present invention can be applied to various vehicles by changing the shape, material, etc. of the receiving plate 24, and its spatial position. Furthermore, if this can be done on the vehicle side, it is also possible to fix the vehicle in a cushioning manner while detecting the longitudinal force of the vehicle only in front or behind the vehicle under test.

[Brief explanation of drawings]

1 to 3 are schematic explanatory diagrams showing each embodiment of a conventional vehicle fixing device, and FIG. 4 is a schematic explanatory diagram of a chassis dynamometer, which is one embodiment of a conventional test device. FIG. 5 is a schematic explanatory diagram showing one embodiment of the present invention, and FIG. 6 is a schematic explanatory diagram showing a different embodiment of the present invention. 1.1B, 1C... Vehicle fixing device, A... Chassis dynamometer, 20... 1i5J rolling roller, 21... iT vehicle under test, 22. 22A... F1 impact fixing mechanism, 23. 23A...detection member, 24...reception plate, 25
...Fixed block, 26...Rod, 27...
- Elastic member, 28... Pressure detection calculation circuit, 2
9...Display device, 3o...Cylinder, 3
1... Operating rod.

Claims (1)

[Scope of Claims] 1) A buffer fixing mechanism for bufferingly fixing a vehicle under test riding on rotating rollers of a vehicle testing device, and a vehicle to be tested that is provided in this buffer fixing mechanism and is added to the buffer fixing mechanism. A vehicle fixing device comprising a detection member capable of detecting longitudinal force of the vehicle. 2) The vehicle fixing device according to claim 1, wherein a pressure detection calculation circuit is connected to the detection member. 3) The buffer fixing mechanism consists of a receiving plate that comes into contact with a part of the vehicle body such as the bumper of the tested vehicle, one end of which is attached to a detection member fixedly provided on the inner wall of this receiving plate, and the other end of which is a fixed block. The vehicle fixing device according to claim 1, comprising a rod that slides therein, and an elastic member that is wound around the rod and that constantly urges the detection member toward the vehicle under test. . 4) The buffer fixing mechanism consists of a receiving plate that comes into contact with a part of the vehicle body such as the bumper of the tested vehicle, and an operating rod for a buffer cylinder that is attached to a detection member fixedly provided on the inner wall of this receiving plate. A vehicle fixing device according to claim 1, characterized in that: