JP5337759B2 - Chassis dynamometer vehicle fixing device - Google Patents

Description

  The present invention relates to a technique for fixing a vehicle to a chassis dynamometer.

In a chassis dynamometer that measures the various characteristics of an automobile by rotating the driving wheels of the automobile on a roller, it is necessary to fix the car body on the roller, fix the vehicle body, and perform the measurement. is there.
As such a vehicle fixing technique, a technique of indexing and fixing a vehicle with a chain in which one end is connected to a pair of standing left and right poles is known (for example, Patent Document 1). .

JP-A-10-307082

  When a vehicle is indexed and fixed, if a small elastic chain or wire rope is used for the vehicle index, the related parts may be damaged by impact. It is preferable to use a flat belt that has an elasticity in the extending direction and can expect an impact mitigating function due to the elasticity.

However, when the flat belt is used for the index, the flat belt is twisted when bent in the width direction, and therefore, the indexable direction is limited by using the flat belt without twisting.
Therefore, an object of the present invention is to provide a vehicle fixing device for a chassis dynamometer that can perform indexing in an arbitrary direction using a flat belt.

  In order to achieve the above object, the present invention provides a flat belt connected to an automobile to a vehicle fixing device of a chassis dynamometer for fixing a vehicle on which a wheel is placed on a roller exposed to an opening provided in a floor board. And a winding device that winds the flat belt around a horizontal winding shaft, and the orientation of the flat belt is changed between a direction in which the width direction is the left-right direction and a direction in which the width direction is the up-down direction. A direction change mechanism that allows the flat belt to enter and exit from the winding device with the width direction as a horizontal direction, and allows the width direction to enter and exit from the outside of the vehicle fixing device. A unit and an elevating mechanism for elevating and lowering the direction changing unit up and down are provided.

  Here, the direction changing mechanism includes, for example, a horizontal roller provided on the winding device side on the path of the flat belt, including a roller having two horizontal directions in which the flat belt travels as a rotation axis. A roller unit, and an upper and lower roller unit provided on the outer side on the path of the flat belt, each having a roller having a rotation axis in the vertical direction between which the flat belt travels between the roller unit. .

  According to such a vehicle fixing device, the direction changing unit that allows the flat belt to enter and exit from the outside can be arbitrarily moved up and down by the elevating mechanism. Further, the flat belt is moved in and out of the vehicle fixing device by the direction changing unit with the width direction as the vertical direction. Therefore, the height of the place where the flat belt enters and exits between the vehicle fixing device and the outside can be set to an arbitrary height, and the flat belt is twisted outside the vehicle fixing device outside the both fixing devices. The angle formed by the flat belt with respect to the longitudinal direction of the automobile as viewed from above and below in the extending direction of the flat belt can be arbitrarily set.

  Therefore, regardless of the height of the connecting position of the automobile and the position in the left-right direction of the automobile, the automobile can be indexed by using the flat belt straight without twisting between the vehicle fixing device and the automobile.

  As described above, according to the present invention, it is possible to provide a vehicle fixing device for a chassis dynamometer that can perform indexing in an arbitrary direction using a flat belt.

It is a figure which shows the structure of the test apparatus which concerns on embodiment of this invention. It is a figure which shows the structure of the vehicle fixing device which concerns on embodiment of this invention. It is a figure which shows the mechanism of the vehicle fixing device which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 schematically shows the configuration of the chassis dynamometer according to this embodiment.
Here, FIG. 1a is a schematic top view of the chassis dynamometer, and FIG. 1b is a schematic side view of the chassis dynamometer.
As shown in the figure, this chassis dynamometer is a chassis dynamometer for a front-wheel drive automobile, in which the automobile is advanced on the floor plate forming the upper surface of the frame 1, and each of the front wheels of the automobile is moved to the floor plate of the frame 1. In addition to fixing the rear wheel of the automobile with the wheel stopper 3 and positioning the rear wheel of the automobile in the opening provided in The vehicle is indexed and fixed with a flat belt 40 from the front by two vehicle fixing devices 4 that are separated from each other in the front and left and right and fixed on the floor plate, and the vehicle is driven by a dynamometer connected to each roller 2 while the fixed vehicle is running. It measures various characteristics.

  Next, the configuration of the vehicle fixing device 4 is shown in FIG. Here, FIG. 2 shows a configuration of the right vehicle fixing device 4 expressed as defining front, rear, left and right as shown in FIG. 1a. Note that the left vehicle fixing device 4 also has a symmetrical configuration with the right vehicle fixing device 4 or the same configuration as the right vehicle fixing device 4.

In FIG. 2, a is a configuration of the vehicle fixing device 4 viewed from above, b is a configuration of the vehicle fixing device 4 viewed from the rear side of the automobile, and c is a configuration of the vehicle fixing device 4 viewed from the left side. In the configuration, d shows the configuration of the vehicle fixing device 4 as viewed obliquely from above.
As shown in the figure, the vehicle fixing device 4 includes a flat belt 40, a base 41, a take-up shaft 42 that is supported by the base 41 with the left-right direction as a rotation axis, and a deceleration that is supported by the base 41. Supported by the machine 43, the motor 44 that rotationally drives the winding shaft 42 via the speed reducer 43 supported by the base 41, the brake unit 45 that suppresses the rotation of the winding shaft 42, the lifting unit 46, and the base 41. An elevating device 47 that elevates the elevating unit 46 up and down is provided. And the connection tool 48 for connecting with an automobile is fixed to the end of the flat belt 40.

  Here, as shown in FIG. 2c, the lifting device 47 is connected to a bearing frame 471 supported by the base 41, a ball screw 472 supported up and down by the bearing frame 471 with the vertical direction as a rotation axis, and a ball screw 472. The lifting / lowering unit 46 is supported by the ball screw 472 via a ball nut fixed to the lifting / lowering unit 46. The handle 473 is configured to rotate the ball screw 472.

With such a configuration, when the operator rotates the handle 473, the ball screw 472 rotates, and the lifting unit 46 supported by the ball screw 472 moves up and down via the ball nut.
Next, as shown in FIGS. 3 a 1 and a 2, the lifting unit 46 includes a horizontal roller unit 461 disposed behind the winding shaft 42, and a vertical roller unit 462 disposed behind the horizontal roller unit 461. It has. Here, the horizontal roller unit 461 includes two rollers that are pivotally supported by the elevating unit 46 and rotate about the horizontal direction as a rotation axis and are spaced apart from each other in the vertical direction. The vertical roller unit 462 is composed of two rollers that are pivotally supported by the elevating unit 46 and rotate about the vertical direction as a rotation axis and are spaced apart from each other on the left and right.

  Here, FIG. 3a1 shows the positional relationship among the flat belt 40, the winding shaft 42, the horizontal roller unit 461, and the vertical roller unit 462 as seen from above, and FIG. 3a2 is seen from the left side. Further, the positional relationship among the flat belt 40, the winding shaft 42, the horizontal roller unit 461, and the vertical roller unit 462 is shown.

  As shown in the figure, the two rollers 2 of the horizontal roller unit 461 guide the traveling of the flat belt 40 between them in the front-rear direction with the width direction being the left-right direction, and the two rollers 2 of the vertical roller unit 462 No. 2 guides the traveling of the flat belt 40 in the front-rear direction with the width direction being the up-down direction.

Now, the travel route from the winding shaft 42 of the flat belt 40 to the outside in the vehicle fixing device 4 is the next route as shown in FIGS. 3a1 and a2.
That is, the flat belt 40 having one end fixed to the take-up shaft 42 and taken up by the take-up shaft 42 with the width direction as the left-right direction is disposed horizontally from the take-up shaft 42 to the rear of the take-up shaft 42. The roller unit 461 is guided straight rearward, diagonally upward, or diagonally downward depending on the height of the elevating unit 46 set at that time, with the width direction being left and right. Then, the flat belt 40 guided to the horizontal roller unit 461 changes its traveling direction to the horizontal rear direction with the width direction being the left-right direction. Then, the flat belt 40 whose traveling direction is changed in the horizontal rear direction by the horizontal roller unit 461 is twisted in the direction of rotating 90 degrees about the front-rear direction (longitudinal direction of the flat belt 40) in the middle of the vertical roller unit 462. While being guided by the vertical roller unit 462, the width direction is changed to the up and down direction while keeping the traveling direction as the horizontal rear direction, and proceeds to the outside.

Further, the travel route from the outside of the flat belt 40 to the winding shaft 42 in the vehicle fixing device 4 is the reverse of the above route.
Here, as described above, the elevating unit 46 that pivotally supports the horizontal roller unit 461 and the vertical roller unit 462 can be moved up and down to an arbitrary height by the elevating device 47. Therefore, as shown in FIGS. 3a2 and 3c, the height of the entrance / exit portion of the flat belt 40 between the vehicle fixing device 4 and the outside can be set to an arbitrary height. Therefore, the height of the travel route of the flat belt 40 outside the vehicle fixing device 4 can be set arbitrarily.

  Further, since the flat belt 40 enters and exits the vehicle fixing device 4 with the width direction being the vertical direction, the flat belt 40 is twisted outside the vehicle fixing device 4 outside the vehicle fixing device 4 as shown in FIG. An angle in the left-right direction of the travel path of the flat belt 40 that can be taken without giving (an angle formed by the flat belt 40 with respect to the front-rear direction when viewed from the top-bottom direction) can be arbitrarily set.

Therefore, the flat belt 40 is used straight without twisting between the vehicle fixing device 4 and the automobile, as shown in FIGS. Can be indexed.
Further, since the flat belt 40 is wound by the winding shaft 42 having a horizontal winding shaft, the flat belt 40 can be stably wound and fed out.
Hereinafter, a procedure for fixing an automobile using such a vehicle fixing device 4 will be described.
First, the automobile is advanced on the floor plate of the frame 1 to position each wheel on the roller 2.
Then, the handle 473 of the vehicle fixing device 4 is operated to move the elevating unit 46 up and down, and the height of the flat belt 40 between the vehicle fixing device 4 and the outside is set to the height of the connecting position of the automobile. Adjust it.
Then, the brake unit 45 is controlled so that the winding shaft 42 is in a free state, the flat belt 40 is pulled out from the vehicle fixing device 4, and the connector 48 is connected to the automobile.
Then, in a state where the motor 44 is controlled to wind the flat belt 40 by the winding shaft 42 so that a predetermined tension is applied to the flat belt 40, the brake unit 45 is controlled to fix the winding shaft 42 and Complete the fixation.
The embodiment of the present invention has been described above.
In the above embodiment, the elevating unit 46 may be mounted with the winding shaft 42, the motor 44, the transmission, and the brake unit 45 so that the elevating device 47 moves up and down.

  DESCRIPTION OF SYMBOLS 1 ... Frame, 2 ... Roller, 3 ... Wheel stopper, 4 ... Vehicle fixing device, 40 ... Flat belt, 41 ... Base, 42 ... Winding shaft, 43 ... Reduction gear, 44 ... Motor, 45 ... Brake unit, 46 DESCRIPTION OF SYMBOLS ... Lifting unit, 47 ... Lifting device, 48 ... Connecting tool, 461 ... Horizontal roller unit, 462 ... Vertical roller unit, 471 ... Bearing frame, 472 ... Ball screw, 473 ... Handle.

Claims (2)

A chassis dynamometer vehicle fixing device for fixing a vehicle on which wheels are placed on a roller exposed to an opening provided in a floor plate,
A flat belt connected to the car;
A winding device for winding the flat belt around a horizontal winding shaft;
A direction changing mechanism for changing the direction of the flat belt between a direction in which the width direction is the left-right direction and a direction in which the width direction is the up-down direction, and the width direction as the horizontal direction between the winding device and the winding device A direction changing unit that allows the flat belt to enter and exit, and allows the width direction to enter and exit from the outside of the vehicle fixing device.
A vehicle fixing device for a chassis dynamometer, comprising an elevating mechanism for elevating and lowering the direction changing unit. A vehicle fixing device for a chassis dynamometer according to claim 1,
The direction changing mechanism includes a horizontal roller unit provided on the winding device side on a path of the flat belt, the roller having two horizontal directions on which the flat belt travels as a rotation axis. And a vertical roller unit provided on the outer side on the path of the flat belt, the roller dynamo having two vertical rollers on which the flat belt travels. Meter vehicle fixing device.