JPH04340436A - Vehicle constraint device of chassis dynamometer - Google Patents

Abstract

PURPOSE:To enable a vehicle which is introduced onto a chassis dynamometer to be constrained readily and positively regardless of a type of vehicle. CONSTITUTION:A vehicle information of a vehicle 6 which is mounted on a roller 3 of a chassis dynamometer 1 is input to a controller 14 and a height position command of a stopper roller 8 which is needed for constraining the vehicle 6 of a corresponding model is given to a motor drive unit 13. A ball screw 10 is driven by the motor drive unit 13 and the stopper roller 8 is lifted to a specified height position corresponding to the model and then is positioned.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle restraint system for a chassis dynamometer, and more particularly to a vehicle restraint system suitable for a so-called in-line type chassis dynamometer that tests completed vehicles at the end of a vehicle assembly line.

0002

2. Description of the Related Art When a vehicle performance test is performed using a chassis dynamometer, a free roller tester, etc., various vehicle restraint devices are used to prevent the vehicle from jumping out.

For example, in an existing chassis dynamometer, the front and rear parts of a vehicle 32 are fixed to support stands 33 using lashing chains 31, respectively, as shown in FIG. This is because, unlike a free roller tester, in a chassis dynamometer, running resistance is added by the forced rotation of the rollers 35 at the same time as the wheels 34 are rotated, and a forward force is applied to the vehicle 32 itself. The vehicle 32 is tightened with the lashing chain 31 so that the vehicle 32 does not jump out.

On the other hand, in a free roller tester,
Since the running resistance of the vehicle is smaller than that of a chassis dynamometer, as shown in FIG. ，
37 to restrict movement of the vehicle 32 in the longitudinal direction.

[0005]

[Problems to be Solved by the Invention] Although the conventional vehicle restraint device shown in FIG. 3 can firmly secure the vehicle 32, it requires a large amount of man-hours and time to secure the vehicle 32 with the lashing chain 31. However, it cannot be applied to a so-called in-line chassis dynamometer that tests each vehicle in accordance with the production takt.

Furthermore, in the vehicle restraint system shown in FIG. 4, the stopper roller 38 is simply pushed up to a certain height, so depending on the vehicle type, the position of the stopper roller 38 may be too low and the vehicle restraint force may be insufficient. . Therefore, even if a free roller tester with low running resistance of the vehicle 32 is sufficient regardless of the vehicle type, an inline tester with a large running resistance added to the vehicle 32 and in which multiple vehicle types are randomly input It cannot be applied to type chassis dynamometers.

The present invention has been made in view of the above-mentioned problems, and when applied to an in-line chassis dynamometer, it is possible to perform vehicle restraint work quickly and to securely secure the vehicle regardless of the type of vehicle. An object of the present invention is to provide a vehicle restraint device capable of restraining a vehicle.

[0008]

[Means for Solving the Problems] The present invention restrains the longitudinal movement of the vehicle by pushing up a stopper roller placed close to the roller on which the wheels of the test vehicle are placed above the roller. A vehicle restraint device for a chassis dynamometer according to the present invention includes a roller support body on which a stopper roller is rotatably mounted and is provided with a driven screw portion, and a drive screw member screwed into the driven screw portion. A motor drive unit that raises and lowers the stopper roller based on the spiral action of a screw by rotating a member, and a height of the stopper roller that is necessary to restrain a vehicle of a corresponding vehicle type according to vehicle type information given from the outside. and a positioning control device that gives a position command to the motor drive unit to position the stopper roller at a predetermined height position depending on the vehicle type.

[0009]

[Function] According to this structure, although the vehicle is basically restrained by stopper rollers instead of lashing chains, the stopper rollers receive the vehicle type information of the vehicle put on the chassis dynamometer and set the stopper roller to the applicable vehicle type. The vehicle rises to the height required to restrain the vehicle.

0010

[Embodiment] Fig. 1 is a diagram showing an embodiment of the present invention. A chassis dynamometer 1 is installed at the end of a vehicle assembly line, and multiple types of vehicles completed on the vehicle assembly line are processed according to the production tact. They are sequentially placed on the chassis dynamometer 1.

The chassis dynamometer 1 is provided with rollers 3 on which wheels 2 are placed, as well as a vehicle restraint device 4 and an emergency vehicle push-up device 5, which will be described later. Then, after restraining the movement of the vehicle 6 in the longitudinal direction by the vehicle restraint device 4, the wheels (drive wheels) 2 of the vehicle 6 are rotationally driven, and at the same time, the rollers 3 are forcibly rotated by the motor 7. The test is conducted with running resistance added to the vehicle.

The vehicle restraint device 4 is individually provided close to the front and rear rollers 3 on which the wheels 2 are placed, and also includes a stopper roller 8. The stopper roller 8 is rotatably supported by a bar 9 serving as a roller support, and the bar 9 is connected to the tip of a screw shaft 11 of an obliquely arranged ball screw 10.

On the other hand, a motor drive unit 13 is accommodated in the housing 12 of the vehicle restraint system 4, and the motor drive unit 13 is connected to the screw shaft 11.
It consists of a nut member (not shown) that is screwed into the nut member, and a servo motor and a transmission gear train that rotationally drive the nut member. Therefore, by activating the motor drive unit 13, the nut member is used as a driving screw member, and the screw shaft 11 is used as a driven screw member.
Due to the screw action of these screws, the stopper roller 8 moves up and down along with the screw shaft 11 in an oblique direction.

The vehicle restraint device 4 includes a stopper roller 8.
A controller 14 is attached as a positioning control device, and this controller 14 receives vehicle type information from a higher-level tester line management device 15 that centrally manages the entire tester line including the chassis dynamometer 1. Photoelectric switch 16, 1 for detecting vehicle ejection
The outputs from 7 are respectively input. The controller 14 then transmits the vehicle type information of the vehicle 6 to be tested on the chassis dynamometer 1 to the tester line management device 15.
The height position information of the stopper roller 8 necessary to restrain the vehicle 6 of the corresponding vehicle type is selected from the roller height management table and output to the servo control device 18 of the vehicle restraint device 4. I will do it.

The photoelectric switches 16 and 17 are provided to detect signs of the vehicle 6 jumping out from the chassis dynamometer 1, and in the unlikely event that the vehicle 6 is located at a position detected by one of the photoelectric switches 16. When the controller 14 receives the output from the photoelectric switch 16,
gives a command to the roller drive control device 19 to immediately cut off the rotational driving force of the roller 3.

Further, when the other photoelectric switch 17 detects the vehicle 6, the controller 14 gives a command to the actuator of the vehicle lifting device 5 to raise the lifter table 20, and lifts the vehicle 6 itself from the rollers 3. It is configured to allow

Therefore, according to the above structure, the vehicle type information of the vehicle 6 input to the chassis dynamometer 1 is
Tester line management device 1 by tracking control method
5, when a vehicle 6 to be tested enters and is positioned on the chassis dynamometer 1, as shown in FIG. 15 to controller 14
(Steps S1 and S2). Note that the vehicle 6 stops at a position where the wheels 2 are on the rollers 3.

When the vehicle type information is input to the controller 14, the controller 14 stores the height position information of the stopper roller 8 necessary for restraining the vehicle 6 of the corresponding type on the chassis dynamometer 1 in the roller height management table. , and outputs it to the servo control device 18 of the vehicle restraint system 4.

The motor drive unit 13 is activated for the first time when the height position information of the stopper roller 8 is input to the servo control device 18. This motor drive unit 1
3, the stopper roller 8 rises to a required height position for the spiral action of the ball screw 10, and the vehicle 6
The movement in the front and back direction is restricted (step S3).

In this manner, the wheels 2 of the vehicle 6 are driven to rotate while the movement of the vehicle 6 in the longitudinal direction is restrained.
A predetermined test is performed by rotationally driving the roller 3 by the motor 7 and applying running resistance together with the rotation of the roller 3 (step S4). Then, when the test is finished, the stopper roller 8 is lowered to the original origin position (steps S11, S12).

During the test, if the movement of the vehicle 6 in the longitudinal direction becomes large, one of the photoelectric switches 16
If detected (step S5), the running resistance given by the roller 3 is canceled by cutting off the rotational driving force of the roller 3 as described above (step S6,
S7).

Furthermore, when the other photoelectric switch 17 detects the vehicle 6, the vehicle lifting device 5 is activated (steps S8, S9, S10), and the vehicle 6 itself is lifted from the rollers 3, thereby improving safety. secure.

Furthermore, even if the motor drive unit 13 of the vehicle restraint system 4 were to fail, the stopper roller 8 would still descend under its own weight since the ball screw 10 is used in the lifting mechanism of the stopper roller 8. Since the stopper roller 8 can be held in the raised position without any problems, safety can also be ensured.

[0024]

As described above, according to the present invention, the stopper roller supported by the roller support body is raised and lowered by the spiral action of the screw, and the positioning device moves the stopper roller to the optimal height position for each vehicle type. Because it is configured to position the vehicle, it can be easily applied to many types of vehicles, and unlike conventional lashing chain types, it does not take a long time to secure the vehicle, and the vehicle can be placed on the chassis dynamometer. The time from when the object is restrained by the stopper roller can be shortened. As a result, it can now be fully applied to in-line chassis dynamometers for multi-vehicle mixed assembly lines where multiple vehicle types flow on the same line, allowing tests to be carried out with the same running resistance as in actual driving. Can be carried out inline and with short takt time.
The work efficiency of testing using a chassis dynamometer is greatly improved.

[Brief explanation of drawings]

FIG. 1 is a configuration explanatory diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing a test procedure in the apparatus of FIG. 1.

FIG. 3 is an explanatory diagram showing an example of a conventional vehicle restraint device.

FIG. 4 is an explanatory diagram showing another example of a conventional vehicle restraint device.

[Explanation of symbols]

1...Chassis dynamometer 2...wheels 3... Laura 4...Vehicle restraint device 6...Vehicle 8...Stopper roller 9...Bar (roller support) 10...Ball screw 11...Screw shaft 13...Motor drive unit

Claims (1)

[Claims] 1. A vehicle restraint device for a chassis dynamometer, which restrains the longitudinal movement of a vehicle by pushing up a stopper roller placed close to a roller on which the wheels of a test vehicle are placed above the roller. The stopper roller has a roller support body on which the stopper roller is rotatably mounted and is provided with a driven threaded part, and a driving screw member screwed into the driven threaded part, and the driving screw member is rotationally driven to drive the screw. a motor drive unit that raises and lowers the stopper roller based on the spiral action of the motor drive unit; and a height position command for the stopper roller necessary for restraining a vehicle of a corresponding type according to vehicle type information given from the outside to the motor drive unit. and a positioning control device for positioning the stopper roller at a predetermined height position according to the vehicle type.