JP6131824B2 - Vehicle fixing device and vehicle fixing method - Google Patents

Description

  The present invention relates to a vehicle fixing device and a vehicle fixing method, and is particularly suitable for fixing a vehicle with wheels mounted on rollers of a chassis dynamometer.

  The running performance test of the vehicle is performed in a state where driving wheels are placed on the rollers of the chassis dynamometer. Therefore, when the vehicle is a four-wheel (all-wheel) drive, the front wheel and the rear wheel are respectively placed on a pair of rollers connected to the chassis dynamometer, and the vehicle is fixed in that state to perform a bench test. . As a method for fixing the vehicle in such a state where the front and rear wheels of the four-wheel drive vehicle are placed on the rollers of the chassis dynamometer, there are methods described in Patent Document 1 and Patent Document 2, for example. Among them, in the vehicle fixing method described in Patent Document 1 below, when the front part and the rear part of the vehicle are fixed to a fixing member on the floor surface, a fluid pressure cylinder is interposed in a chain connecting the two. This fluid pressure cylinder has an urging member that brings the front and rear parts of the vehicle close to the fixed member, connects the two chambers defined by the piston by a bypass passage, and interposes a variable throttle valve in the bypass passage. . For example, the piston position of the fluid pressure cylinder interposed between the front part of the vehicle and the fixed member is made the same as the piston position of the fluid pressure cylinder interposed between the rear part of the vehicle and the fixed member. When the vehicle is artificially accelerated / decelerated on the roller from the state, the piston is moved by the braking / driving force corresponding to the acceleration / deceleration, and the vehicle is in a stable state. Further, when the bypass passage is blocked by the variable throttle valve, the movement of the piston is restricted and the vehicle can be fixed. Further, in Patent Document 2 below, when fixing the front part and the rear part of the vehicle to the fixing device via the belt, the optimum traction force for towing the vehicle is determined based on the traction angle for towing the vehicle, and the traction force is A fixing device winds up the belt. For example, when fixing the two front parts of the vehicle to the two fixing devices in front of the vehicle and fixing the two rear parts of the vehicle to the two fixing devices in the rear of the vehicle, the optimum traction force determined by each fixing device is determined. The vehicle can be fixed in a stable posture by winding the belt.

No. 6-7355 JP 2009-128319 A

  However, as described in Patent Document 1, when the vehicle is fixed with a chain, there is a slight slack or rattling in the chain. When fixed with a belt, the belt has elasticity. Therefore, when the vehicle is artificially accelerated / decelerated on the roller, the contact positions of the front and rear wheels and the roller are shifted, and the vehicle is sometimes tilted to deviate from a preset running resistance state. If the running resistance state on the chassis dynamometer deviates from the preset state in this way, the performance result obtained in the test also differs from the original performance.

  The present invention has been made paying attention to the above-described problems, and the position of contact between the front wheels and the rear wheels and the rollers on the chassis dynamometer is difficult to shift, and as a result, the running resistance state due to the vehicle position shift. It is an object of the present invention to provide a vehicle fixing device and a vehicle fixing method capable of improving the accuracy of the bench test.

  According to a first aspect of the present invention, there is provided at least two front-side fixings arranged on a floor surface in front of a vehicle with respect to a vehicle having a front wheel and a rear wheel mounted on a pair of rollers connected to a chassis dynamometer. The front part of the vehicle is connected to a point via a front side fixing device, and the rear part of the vehicle is connected to the at least two rear side fixing points arranged on the floor surface behind the vehicle via the rear side fixing device. The front side fixing device includes a plurality of traction members that individually connect between the front portion of the vehicle and the front side fixing point and whose total length can be adjusted. The side fixing device includes a rigid member, a connecting member that extends from the rear of the vehicle to the rear of the vehicle, an axle that is connected to a vehicle rear side end of the connecting member and extends in the left-right direction of the vehicle, Both A pair of wheels arranged in parts, characterized in that said wheel and a wheel fixing member for fixing the rear fixed point.

  According to a second aspect of the present invention, there is provided at least two front-side fixings arranged on a floor surface in front of a vehicle with respect to a vehicle having a front wheel and a rear wheel mounted on a pair of rollers connected to a chassis dynamometer. The front part of the vehicle is connected to a point via a front side fixing device, and the rear part of the vehicle is connected to the at least two rear side fixing points arranged on the floor surface behind the vehicle via the rear side fixing device. The front-side fixing device includes a plurality of traction members whose overall lengths can be adjusted, and the traction member individually connects the front portion of the vehicle and the front-side fixing point. The rear-side fixing device includes a rigid member, and extends from the rear portion of the vehicle to the rear of the vehicle. The axle is connected to the vehicle rear-side end of the connecting member and extends in the left-right direction of the vehicle. A pair of wheels disposed at both ends of the axle, and a wheel fixing member that fixes the wheel to the rear side fixing point; the connection member, the axle, the wheel, and the wheel fixing member; The rear portion is fixed to the rear side fixing point.

  As described above, according to the first aspect, two or more vehicles arranged on the floor surface on the front side of the vehicle with respect to the vehicle in which the front wheels and the rear wheels are mounted on the pair of rollers connected to the chassis dynamometer. The front part of the vehicle is connected to the front side fixing point via the front side fixing device, and the rear part of the vehicle is connected to the two or more rear side fixing points arranged on the floor surface on the rear side of the vehicle via the rear side fixing device. . The front side fixing device includes a plurality of traction members whose overall lengths can be adjusted in order to individually connect the front portion of the vehicle and the front side fixing point. On the other hand, the rear-side fixing device is made of a rigid member, and is connected to a connecting member extending from the rear of the vehicle to the rear of the vehicle, to an end of the connecting member on the rear side of the vehicle and extending in the left-right direction of the vehicle, and to both ends of the axle. A pair of wheels to be arranged, and a wheel fixing member for fixing the wheel to the rear side fixing point are provided. Therefore, the axle of the rear fixing device and the rear portion of the vehicle are rigidly coupled at least in the vehicle front-rear direction, and the axle of the rear fixing device is connected to the vehicle by the wheels disposed at both ends of the axle. By moving in the front-rear direction, the front wheels and the rear wheels of the vehicle can be arranged at optimal positions with respect to each of the pair of rollers. And the rear part of the vehicle is fixed to the rear side fixing point by the connecting member, axle, wheel, wheel fixing member of the rear side fixing device, and the front part of the vehicle is connected to the front side fixing point by the traction member of the front side fixing device. The vehicle can be positioned at an appropriate position. At this time, the rear portion of the vehicle is rigidly fixed at least in the vehicle front-rear direction with respect to the rear fixing point. Therefore, even if the vehicle is artificially accelerated / decelerated on the roller of the chassis dynamometer, the contact positions of the front and rear wheels and the roller are unlikely to shift. Therefore, the running resistance state due to the displacement of the vehicle is unlikely to fluctuate, and the bench test system can be improved.

  Further, according to the second aspect, two or more front-side fixings arranged on the floor surface on the front side of the vehicle with respect to a vehicle in which the front wheels and the rear wheels are placed on a pair of rollers connected to the chassis dynamometer. The front part of the vehicle is connected to the point via the front side fixing device, and the rear part of the vehicle is connected to the two or more rear side fixing points arranged on the floor surface on the rear side of the vehicle via the rear side fixing device. The front side fixing device includes a plurality of traction members whose overall lengths can be adjusted in order to individually connect the front portion of the vehicle and the front side fixing point. On the other hand, the rear-side fixing device is made of a rigid member, and is connected to a connecting member extending from the rear of the vehicle to the rear of the vehicle, to an end of the connecting member on the rear side of the vehicle and extending in the left-right direction of the vehicle, and to both ends of the axle. A pair of wheels to be arranged, and a wheel fixing member for fixing the wheel to the rear side fixing point are provided. Therefore, the axle of the rear fixing device and the rear portion of the vehicle are rigidly coupled at least in the vehicle front-rear direction, and the axle of the rear fixing device is connected to the vehicle by the wheels disposed at both ends of the axle. By moving in the front-rear direction, the front wheels and the rear wheels of the vehicle can be arranged at optimal positions with respect to each of the pair of rollers. And the rear part of the vehicle is fixed to the rear side fixing point by the connecting member, axle, wheel, wheel fixing member of the rear side fixing device, and the front part of the vehicle is connected to the front side fixing point by the traction member of the front side fixing device. The vehicle can be positioned at an appropriate position. At this time, the rear portion of the vehicle is rigidly fixed at least in the vehicle front-rear direction with respect to the rear fixing point. Therefore, even if the vehicle is artificially accelerated / decelerated on the roller of the chassis dynamometer, the contact positions of the front and rear wheels and the roller are unlikely to shift. Therefore, the running resistance state due to the displacement of the vehicle is unlikely to fluctuate, and the bench test system can be improved.

FIG. 1 is a side view of an overall configuration showing an embodiment of a vehicle fixing device and a vehicle fixing method of the present invention. FIG. 2 is a perspective view of the vehicle fixing device and the vehicle fixing method of FIG. 1. FIG. 3 is a rear side view of the vehicle fixing device and the vehicle fixing method of FIG. 1. FIG. 4 is a perspective view of the vehicle fixing device and the vehicle fixing method of FIG. 1. FIG. 5 is a schematic configuration plan view for explaining the operation of the vehicle fixing device and the vehicle fixing method of FIG. FIG. 6 is a schematic configuration plan view for explaining the operation of the vehicle fixing device and the vehicle fixing method of FIG. 1. FIG. 7 is a schematic configuration plan view for explaining the operation of the vehicle fixing device and the vehicle fixing method of FIG. 1. FIG. 8 is a schematic configuration plan view for explaining the operation of the vehicle fixing device and the vehicle fixing method of FIG. 1. FIG. 9 is a side view of the overall configuration showing an example of a conventional fixing device and fixing method for a two-wheel drive vehicle. FIG. 10 is a schematic plan view illustrating the operation of a conventional four-wheel drive vehicle fixing device and fixing method. FIG. 11 is a schematic plan view illustrating the operation of a conventional four-wheel drive vehicle fixing device and fixing method. FIG. 12 is a schematic plan view illustrating the operation of a conventional four-wheel drive vehicle fixing device and fixing method. FIG. 13 is a schematic plan view illustrating the operation of a conventional four-wheel drive vehicle fixing device and fixing method.

  Next, an embodiment of a vehicle fixing device and a vehicle fixing method according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an overall configuration of a vehicle fixing device and a vehicle fixing method of the present embodiment, and FIGS. 2 to 4 are perspective views and rear side views of the vehicle fixing device and the vehicle fixing method of FIG. FIG. The vehicle fixing device and the vehicle fixing method according to the present embodiment are suitable, for example, when a performance test of a four-wheel (all-wheel) drive vehicle 2 is performed by the chassis dynamometer 1. The chassis dynamometer 1 of the present embodiment has a floor 3 that constitutes a floor surface, and two openings on the floor 3 in the vehicle front-rear direction are formed according to the wheel base of the vehicle 2. The upper end portion of the outer peripheral surface of the roller 4 is exposed at each portion. Each roller 4 is arranged such that the highest part of the outer peripheral surface thereof is equal to the floor surface of the floor 3 such that the axis is parallel to the vehicle width direction and horizontal. Note that at least one of the openings and the roller 4 exposed thereto are movable in the front-rear direction of the vehicle.

  In the bench test of a four-wheel (all-wheel) drive vehicle, the front wheel 5 of the vehicle 2 is placed on the roller 4 at the front of the vehicle, and the rear wheel 6 is placed on the roller 4 at the rear of the vehicle. At this time, the front wheel 5 and the rear wheel 6 are provided with a predetermined portion of the outer peripheral surface of the roller 4, for example, the outer peripheral surface of the roller 4, so that a predetermined running resistance is added to the front wheel 5 and the rear wheel 6. It is desirable to maintain contact with the highest portion. That is, when the contact portion of the front wheel 5 or the rear wheel 6 with respect to the roller 4 deviates from the preset portion of the roller 4, the state of the running resistance applied to the front wheel 5 and the rear wheel 6 is changed from the preset state. It will shift. If the running resistance state added to the front wheels 5 and the rear wheels 6 deviates from the preset state, the performance test results themselves differ from the original results, and the performance test accuracy decreases. Therefore, in a bench test of a four-wheel (all-wheel) drive vehicle, the vehicle 2 is fixed in a state where the front wheels 5 and the rear wheels 6 of the vehicle 2 are in contact with a predetermined portion of the outer peripheral surface of the roller 4. Do.

  In the present embodiment, the front portion of the vehicle 2 is connected to the front fixing point 7 disposed on the floor 3 on the front side of the vehicle 2 via the front side fixing device 8, and on the floor 3 on the rear side of the vehicle 2 with respect to the vehicle 2. The rear part of the vehicle 2 is connected to the rear side fixing point 9 arranged at the rear side via the rear side fixing device 10. In the bench test of a four-wheel (all-wheel) drive vehicle, braking / driving force is applied to the front wheels 5 and the rear wheels 6 to simulate acceleration / deceleration of the vehicle. At this time, two or more front fixing points 7 and rear fixing points 9 are set so that the vehicle 2 does not move in the front-rear direction or rotate around the vertical axis (vehicle vertical axis). Is common. Among these, as shown in FIG. 2, the front side fixing device 8 includes a plurality of traction members 11 for connecting the front part of the vehicle 2 to the front side fixing point 7, and the front part of the vehicle 2 is secured by these traction members 11. Connect to each front fixing point 7. These pulling members 11 can all be adjusted in total length by, for example, a turnbuckle. Accordingly, after positioning the position of the vehicle 2 using the rear side fixing device 10 as will be described later, the front portion of the vehicle 2 is tightly coupled to the front side fixing point 7 by adjusting the total length of the traction member 11. Is possible. In the present embodiment, since the vehicle 2 mainly does not move in the vehicle front-rear direction, the front left portion of the vehicle is connected to the front fixed point 7 in front of the vehicle and slightly to the left by the traction member 11, and the right front portion of the vehicle is connected to the front of the vehicle. In addition, the traction member 11 is connected to the front fixing point 7 slightly to the right. Further, since the vehicle does not mainly rotate around the vertical axis, the front left portion of the vehicle is connected to the front fixed point 7 on the front side of the vehicle and the right side of the vehicle by the traction member 11, and the front right portion of the vehicle is connected to the front side of the vehicle. A traction member 11 is connected to the front fixing point 7 on the left side of the vehicle.

  On the other hand, as shown in FIGS. 3 and 4, the rear fixing device 10 is made of a rigid member, and is connected to a connecting member 12 extending from the rear portion of the vehicle 2 to the rear of the vehicle, and a vehicle rear side end portion of the connecting member 12. And an axle 13 extending in the left-right direction of the vehicle 2, a pair of wheels 14 disposed at both ends of the axle 13, and a wheel fixing device 15 that fixes the wheels 14 to the rear fixing point 9. . Furthermore, in this embodiment, the connection part of the connection member 12 and the axle 13 is connected with the rear side fixed point which is not shown in figure by the pulling member 16 which can adjust full length. The connection of the rear fixing device 10 to the rear fixing point by the pulling member 16 is a secondary measure that restricts the vehicle 2 from moving in the vehicle front-rear direction, and mainly fixes the rear portion of the vehicle 2 to the rear fixing. The rear side fixing device 10 is fixed to the point 9.

  The connecting member 12 is formed of a rigid member such as a trailer hitch, and the vehicle front portion of the main body portion 17 extending rearward of the vehicle is rigidly attached to a strength member at the rear portion of the vehicle 2 such as a rear cross member or a rear suspension member. Installed. The axle 13 is rigidly attached to the vehicle rear end of the main body of the connecting member 12 with the axis line directed in the vehicle width direction. The wheels 14 are rotatably attached to both end portions in the axial direction of the axle 13. The wheels 14 are not necessarily attached to the axle 13 so as to be rotatable. However, if the wheels 14 are rotatable relative to the axle 13 as will be described later, the vehicle 2 can be easily positioned at an appropriate position. . The wheel fixing device 15 is a so-called wheel stopper device, and a wedge member 18 fixed to the floor 3 so as to be inserted between the lower portion of the wheel 14 and the floor 3 from the vehicle front-rear direction of the wheel 14, and each wheel 14. The front and rear wedge members 18 are connected to each other above the wheel 14, and the belt 14 is pressed against the rear fixing point 9 by shortening the overall length.

  5 to 8 are schematic configuration plan views for explaining the operation of the vehicle fixing device and the vehicle fixing method of FIG. 1 of the present embodiment. As described above, in the present embodiment, the rear portion of the vehicle 2 is rigidly attached to the connecting member 12 of the rear-side fixing device 10, and the connecting member 12 is formed of a rigid member, and the axle is attached to the vehicle rear end portion of the connecting member 12. 13 is attached, and wheels 14 are attached to both ends of the axle 13. Therefore, if the wheel 14 is rotated with respect to the axle 13, the vehicle 2 can be moved in the vehicle front-rear direction. Therefore, by rotating the wheel 14 and moving the vehicle 2 in the vehicle front-rear direction, the front wheel 5 and the rear wheel 6 of the vehicle 2 can be placed at appropriate positions on the roller 4 as described above. If the vehicle 2 can be positioned at an appropriate position of the chassis dynamometer 1 as described above, the wheel 14 is fixed to the rear fixing point 9 by the wheel fixing device 15 of the rear fixing device 10, as shown in FIG. The vehicle 2 can be fixed by adjusting the total length of the pulling member 11 of the front fixing device 8 and connecting the front portion of the vehicle 2 to the front fixing point 7. At this time, as described above, the rear fixing device 10 may be connected to the rear fixing point 9 by the pulling member 16.

  In this state, when driving force is applied to the front wheels 5 and the rear wheels 6 to accelerate the vehicle 2 in a pseudo manner, a running resistance is applied to the front wheels 5 and the rear wheels 6 from the rollers 4. Since it is smaller than a general road surface reaction force, as shown in FIG. 6, a force for moving the vehicle 2 to the rear of the vehicle acts on the vehicle 2. At this time, the wheel 14 of the rear side fixing device 10 is fixed to the rear side fixing point 9, and the axle 13 and the connecting member 12 that support the wheel 14 are rigidly attached to the rear part of the vehicle 2. Will not move to the rear of the vehicle. Therefore, the contact portion where the front wheel 5 and the rear wheel 6 contact the roller 4 does not change, and the running resistance applied from the roller 4 to the front wheel 5 and the rear wheel 6 does not change. Therefore, the original running performance is obtained in the bench test, and the accuracy of the bench test is improved.

  Similarly, when the vehicle 2 is artificially decelerated by applying a braking force to the front wheels 5 and the rear wheels 6 from a state in which the vehicle 2 is traveling in a pseudo manner, as shown in FIG. Acts to move the vehicle 2 forward of the vehicle. Also at this time, the wheel 14 of the rear side fixing device 10 is fixed to the rear side fixing point 9, and the axle 13 and the connecting member 12 that support the wheel 14 are rigidly attached to the rear part of the vehicle 2. 2 does not move forward of the vehicle. Therefore, the contact portion where the front wheel 5 and the rear wheel 6 contact the roller 4 does not change, and the running resistance applied from the roller 4 to the front wheel 5 and the rear wheel 6 does not change. Therefore, the original running performance is obtained in the bench test, and the accuracy of the bench test is improved.

  Similarly, when the vehicle 2 is about to rotate around the vertical axis, that is, when the vehicle 2 is tilted in the front-rear and left-right directions during the pseudo travel, the wheels 14 are moved as shown in FIG. Since the vehicle is directed in the vehicle longitudinal direction and the axle 13 is oriented in the original vehicle width direction, driving the front wheels 5 and the rear wheels 6 on the rollers 4 causes the force of the vehicle body to go straight in the original vehicle longitudinal direction. It acts, the inclination of the vehicle 2 is lost, and the vehicle 2 is not substantially inclined. Therefore, the contact portion where the front wheel 5 and the rear wheel 6 contact the roller 4 does not change, and the running resistance applied from the roller 4 to the front wheel 5 and the rear wheel 6 does not change. Therefore, the original running performance is obtained in the bench test, and the accuracy of the bench test is improved.

  FIG. 9 is a side view of the overall configuration showing an example of a conventional rear wheel drive vehicle fixing device and fixing method. The same components as those in the present embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In this example, the front wheel 5 is fixed to the front fixing point 102 on the floor surface of the floor 3 by the front wheel fixing device 101 with the rear wheel 6 placed on the roller 4. The rear portion of the vehicle 2 is connected to the rear fixed point 9 by the pulling member 103. The front wheel fixing device 101 is a wheel stopper similar to the wheel fixing device 15 described above. When the vehicle 2 is a front-wheel drive vehicle, the outline is the same except that the front wheels 5 and the rear wheels 6 are reversed. In such a fixing device and fixing method for a two-wheel drive vehicle, the front wheel 5, that is, a non-drive wheel (also referred to as a driven wheel) is fixed directly to the floor surface of the floor 3, so that the vehicle 2 itself is fixed to the rigid. The contact portion where the rear wheel 6, that is, the driving wheel contacts the roller 4 does not change. Therefore, the running resistance applied from the roller 4 to the rear wheel 6, that is, the driving wheel does not change, and the original running performance can be obtained in the bench test.

  10 to 13 are schematic plan views for explaining the operation of the conventional four-wheel drive vehicle fixing device and vehicle fixing method. In the conventional fixing device and fixing method for a four-wheel drive vehicle, the front portion of the vehicle 2 is connected to the two front fixing points 7 on the floor surface by the pulling member 11 of the front fixing device 8 in the same manner as in the above embodiment. To do. Further, the rear portion of the vehicle 2 is connected to two rear fixing points 9 on the floor surface by a pulling member 103 constituting the rear fixing device 10. By adjusting the total length of the pulling member 11 of the front fixing device 8 and the pulling member 103 of the rear fixing device 10 by using, for example, a turnbuckle, the tension and the load are kept constant as in Patent Document 1 and Patent Document 2, for example. It is adjusted to become. As a result, as shown in FIG. 10, it is possible to place the front wheel 5 and the rear wheel 6 on a preset contact portion of the roller 4, but with the adjustment of the total length of the traction members 11, 103, the vehicle 2 Since the vehicle moves in the front-rear and left-right directions, it is difficult to position the vehicle 2 at an appropriate position.

  Further, in the case where the driving force is applied to the front wheels 5 and the rear wheels 6 from this state to accelerate the vehicle 2 in a pseudo manner, the force to move the vehicle 2 backward is applied to the vehicle 2 as described above. To do. At this time, since the traction member 11 constituting the front side fixing device 8 is extended and the traction member 103 constituting the rear side fixing device 10 is contracted, the vehicle 2 moves rearward as shown in FIG. Therefore, the contact portion where the front wheel 5 and the rear wheel 6 come into contact with the roller 4 changes, and the running resistance applied from the roller 4 to the front wheel 5 and the rear wheel 6 also changes. Similarly, when the vehicle 2 is artificially decelerated by applying a braking force to the front wheels 5 and the rear wheels 6 from a state in which the vehicle 2 is traveling in a pseudo manner, the vehicle 2 includes a vehicle as described above. A force acts to move 2 forward of the vehicle. At this time, since the traction member 103 constituting the rear side fixing device 10 is extended and the traction member 11 constituting the front side fixing device 8 is contracted, the vehicle 2 moves forward as shown in FIG. Therefore, the contact portion where the front wheel 5 and the rear wheel 6 come into contact with the roller 4 changes, and the running resistance applied from the roller 4 to the front wheel 5 and the rear wheel 6 also changes. Further, when the vehicle 2 is about to rotate about the vertical axis, that is, when the vehicle 2 is tilted in the front-rear and left-right directions during pseudo traveling, the traction member 11 and the rear side constituting the front-side fixing device 8 are used. The pulling member 103 constituting the fixing device 10 expands and contracts. Thus, once the balance of the tension of the pulling members 11 and 103 is deviated, the vehicle 2 remains tilted as shown in FIG. Therefore, the contact portion where the front wheel 5 and the rear wheel 6 come into contact with the roller 4 changes, and the running resistance applied from the roller 4 to the front wheel 5 and the rear wheel 6 also changes.

  As described above, in the vehicle fixing device and the vehicle fixing method according to the present embodiment, the front wheel 5 and the rear wheel 6 are mounted on the pair of rollers 4 connected to the chassis dynamometer 1. The front part of the vehicle 2 is connected to two or more front side fixing points 7 arranged on the floor (floor surface) 3 via the front side fixing device 8, and 2 arranged on the floor (floor surface) 3 on the rear side of the vehicle. The rear portion of the vehicle 2 is connected to the rear fixing point 9 via the rear fixing device 10. The front side fixing device 8 includes a plurality of traction members 11 whose total length can be adjusted in order to individually connect the front portion of the vehicle 2 and the front side fixing point 7. On the other hand, the rear side fixing device 10 is made of a rigid member, and is connected to a connecting member 12 extending from the rear portion of the vehicle to the rear of the vehicle, to an end portion on the rear side of the connecting member 12, and to an axle 13 extending to the left and right of the vehicle A pair of wheels 14 disposed at both ends of the wheel 13 and a wheel fixing device 15 that fixes the wheel 14 to the rear fixing point 9 are provided. Therefore, the axle 13 of the rear side fixing device 10 and the rear part of the vehicle 2 are rigidly coupled at least in the vehicle front-rear direction, and the rear side fixing is performed by the wheels 14 arranged at both ends of the axle 13. By moving the axle 13 of the apparatus 10 in the longitudinal direction of the vehicle, the front wheels 5 and the rear wheels 6 of the vehicle 2 can be arranged at optimum positions with respect to the pair of rollers 4. Then, the rear portion of the vehicle 2 is fixed to the rear fixing point 9 by the connecting member 12, the axle 13, the wheel 14, and the wheel fixing device 15 of the rear side fixing device 10, and the front side of the vehicle 2 by the traction member 11 of the front side fixing device 8. By connecting the part to the front side fixing point 7, the vehicle 2 can be positioned at an appropriate position. At this time, the rear portion of the vehicle 2 is rigidly fixed to the rear fixing point 9 at least in the vehicle front-rear direction. Therefore, even if the vehicle 2 is artificially accelerated / decelerated on the roller 4 of the chassis dynamometer 1, the contact position between the front wheel 5 and the rear wheel 6 and the roller 4 is difficult to shift. Therefore, the running resistance state due to the displacement of the vehicle 2 is unlikely to fluctuate, and the bench test system can be improved.

  Although the embodiments of the present invention have been disclosed above, it will be apparent to those skilled in the art that changes can be made without departing from the scope of the present invention. All such modifications and equivalents are intended to be included in the following claims.

1 Chassis dynamometer 2 Vehicle 3 Floor (floor surface)
4 Roller 5 Front Wheel 6 Rear Wheel 7 Front Fixing Point 8 Front Fixing Device 9 Rear Fixing Point 10 Rear Fixing Device 11 Traction Member 12 Connecting Member 13 Axle 14 Wheel 15 Wheel Fixing Device 16 Traction Member 17 Main Body 18 Wedge Member 19 Band Element

Claims (2)

With respect to a vehicle in which front wheels and rear wheels are mounted on a pair of rollers connected to a chassis dynamometer, the vehicle is connected to at least two front fixing points disposed on the floor surface in front of the vehicle via a front fixing device. A vehicle fixing device that connects a front portion of a vehicle and connects the rear portion of the vehicle via a rear fixing device to at least two rear fixing points arranged on a floor surface behind the vehicle. And
The front side fixing device is:
A plurality of traction members that individually connect between the front portion of the vehicle and the front-side fixing point and whose total length is adjustable,
The rear side fixing device is:
A connecting member comprising a rigid member and extending rearward from the rear of the vehicle;
An axle connected to the vehicle rear side end of the connecting member and extending in the left-right direction of the vehicle;
A pair of wheels disposed at both ends of the axle;
A vehicle fixing device comprising: a wheel fixing member that fixes the wheel to the rear side fixing point. With respect to a vehicle in which front wheels and rear wheels are mounted on a pair of rollers connected to a chassis dynamometer, the vehicle is connected to at least two front fixing points disposed on the floor surface in front of the vehicle via a front fixing device. A vehicle fixing method for connecting a front portion of a vehicle and for connecting a rear portion of the vehicle via a rear-side fixing device to at least two rear-side fixing points arranged on a floor surface behind the vehicle. And
The front side fixing device includes a plurality of traction members whose total length is adjustable,
Individually connecting the front portion of the vehicle and the front fixing point by the traction member;
The rear side fixing device is:
A connecting member comprising a rigid member and extending rearward from the rear of the vehicle;
An axle connected to the vehicle rear side end of the connecting member and extending in the left-right direction of the vehicle;
A pair of wheels disposed at both ends of the axle;
A wheel fixing member for fixing the wheel to the rear side fixing point;
A vehicle fixing method, wherein the rear portion of the vehicle is fixed to the rear side fixing point by the connecting member, the axle, the wheel, and the wheel fixing member.

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