JPH0626997A - Traveling test device for rolling stock - Google Patents

Abstract

PURPOSE:To provide a small-size and simple traveling test device, satisfactorily support the weight of a rolling stock, effective prevent the wear of a metal belt, and substantially reproduce every traveling condition. CONSTITUTION:A traveling test device for rolling stock has a driving drum 14, a driven drum 16, a metal belt 18 wound on these drums, a load supporting device 44 arranged between the two drums, and a support device 62 for supporting the two drums and the load supporting device 44. The driving drum 14 is rotated by an electric motor 60 supported by the supporting device 62 through a V-belt 70, and the load supporting device 44 blows out a high pressure fluid to the metal belt 18 through a small hole of rigid porous ceramics.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a running test of a vehicle such as an automobile, and more particularly to a running test apparatus for a vehicle.

[0002]

2. Description of the Related Art As one of running test apparatuses for vehicles, a pair of drums, a metal belt wound around these drums, and a pair of the pair of drums are disclosed as disclosed in, for example, Japanese Patent Laid-Open No. 2-194345. A load-carrying device using incompressible liquid disposed between the drums, and a supporting device that rotatably supports the pair of drums and also supports the load-carrying device. 2. Description of the Related Art A running test device is conventionally known in which a load device such as a dynamometer is connected via a drive test device.

According to such a running test device, a running test device is provided corresponding to each wheel of the vehicle, and a load device is connected to at least one of the running test devices via a flywheel to provide a load carrying device. By carrying out the test by mounting the vehicle wheels on the metal belt at the part corresponding to, compared with the case where the test is carried out with the driving wheels of the vehicle directly mounted on the rotating drum. The running test of the vehicle can be carried out under conditions close to the actual running conditions of the vehicle.

[0004]

However, in the conventional running test apparatus as described above, one of the pair of drums of each running test apparatus has a rotary shaft of one of the drums via a flywheel and a dynamometer such as a dynamometer. Since the load device must be connected and maintained in that state, the running test device itself must be large and complicated, and the space where the running test device is installed must be a large space. There is a problem.

Further, since each running test device must be maintained in a state in which the load device and the like are connected as described above,
It is not easy to adjust the position of each running test device according to the interval of each wheel of the vehicle to be tested, and in the conventional running test device as described above, each running test device is moved up and down to cause unevenness. In order to reproduce a road surface, a slope, etc., the load device must be moved up and down in synchronization with the vertical movement of the support device, and there is no means for positively rotating and driving the drum. However, there is a problem that various running conditions of the vehicle cannot be easily reproduced.

Further, in the conventional running test apparatus as described above, high-pressure water is jetted onto the metal belt from a plurality of water jet holes formed on the surface of the sliding member (the surface facing the metal belt). By forming a water film between the sliding member and the metal belt, the weight of the vehicle is supported and wear of the metal belt is prevented. Therefore, in order to make the pressure distribution of the water film uniform, it is necessary to provide a large number of water ejection holes, and in order to avoid a drop in water ejection pressure when providing a large number of water ejection holes, disconnection of each ejection hole is required. Since the area has to be made extremely small, and it is very difficult to form a large number of ejection holes having a very small cross-sectional area, some conventional load carrying devices can carry a good weight of the vehicle and a metal belt. It is difficult to effectively prevent abrasion of the.

The present invention has a small and simple structure in view of the above-mentioned problems in the conventional vehicle running test apparatus.
An object of the present invention is to provide an improved vehicle running test device capable of easily reproducing various running conditions of a vehicle, carrying a good weight of the vehicle, and effectively preventing abrasion of a belt. I am trying.

[0008]

SUMMARY OF THE INVENTION According to the present invention, the above objects are achieved by a driving drum, a driven drum, a belt wound around the driving drum and the driven drum, the driving drum and the driven drum. A load carrying device arranged between the drum and the drum, and a supporting device arranged on the floor to rotatably support the drive drum and the driven drum and to support the load carrying device, wherein the drive drum is The load bearing device is arranged to be rotatably driven by a motor supported by the supporting device via a driving force transmitting means, and the load carrying device is disposed adjacent to and below the upper span of the belt. A running test apparatus for a vehicle, comprising a rigid porous body, and configured to eject a high-pressure fluid onto the belt from individual small holes of the porous body. It is made.

[0009]

According to the above construction, the drive drum is rotatably driven by the electric motor supported by the supporting device via the drive force transmitting means, and the rotary shaft of one of the drums is connected via the flywheel. Since it is not necessary to connect the load device with the load test device, the running test device can be made smaller and have a simpler structure than the conventional one, and the required test space can be reduced.

Further, it is possible to displace the running test device relative to the floor more easily than before, and it is possible to apply a load to the drive drum or positively rotate the drive drum by an electric motor. Therefore, it becomes possible to easily reproduce various running conditions including acceleration and deceleration as well as uneven road surfaces and slopes.

Further, since the load bearing device is designed to eject high-pressure fluid onto the belt through the individual small holes of the substantially rigid porous body, the sliding member as in the case of the conventional running test device is used. Since it is not necessary to form a large number of water ejection holes with a very small cross-sectional area in the interior, and the pressure distribution of the fluid film formed between the porous body and the belt is very uniform, the weight of the vehicle is reduced. Can be favorably supported and abrasion of the belt can be effectively prevented.

[0012]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view showing an embodiment of a vehicle running test apparatus according to the present invention, which is constructed so as to be installed corresponding to each wheel of a vehicle, and FIG. 2 is a load carrying apparatus shown in FIG. FIG. 3 is an enlarged vertical sectional view showing one embodiment of the apparatus, and FIG. 3 is an enlarged plan sectional view showing the driving drum shown in FIG.

In FIG. 1, reference numeral 10 denotes a running test apparatus as a whole, and the running test apparatus 10 is installed in a test apparatus accommodation hole (not shown in the figure) provided on a floor 12 of a running test room. Most of the driving test equipment is located on the floor 1
It is arranged below 2. The running test apparatus 10 has a driving drum 14 and a driven drum 16 each having a substantially cylindrical outer peripheral surface, and a metal belt 18 wound around these drums. The drive drum 14 and the driven drum 16 are rotatably supported by a pair of bearing devices 20 and 22, respectively, about axes 24 and 26 extending horizontally substantially parallel to each other. Bearing device 20 and 22
Are respectively supported by the tips of a pair of arm portions of support frames 28 and 30 which are substantially U-shaped when viewed from above, and the base portions of the support frames 28 and 30 are composed of the drive drum 14 and the driven drum 16. It is fixed to the side surface of the support block 32 arranged therebetween.

In the illustrated embodiment, bearing device 20 includes support frame 28 as will be described in greater detail below with reference to FIG.
While it is fixedly supported at the tip of the arm part of
The bearing device 22 is supported at the tip of the arm portion of the support frame 30 so as to be relatively displaceable in the left-right direction when viewed in FIG. A pair of hydraulic cylinder devices 34 are fixed to the support block 32 adjacent to the pair of arm portions of the support frame 30, and the bearing devices 22 corresponding to these hydraulic cylinder devices 34 are moved in the left-right direction when viewed in FIG. The tension of the metal belt 18 is adjusted by adjusting the distance between the axes 24 and 26 and the parallelism of the axis 26 with respect to the axis 24 and the direction perpendicular to the plane of the paper of FIG. 1 of the metal belt. The position of is adjusted.

Brackets 36 and 38 are fixed to the tips of the pair of arm portions of the support frames 28 and 30, respectively, and a cover (not shown) is fixed to these brackets. . Further, a pair of arm portions of the support frame 28 is provided with an optical sensor 40 for detecting a positional deviation within a permissible range of the metal belt 18 in a direction perpendicular to the paper surface of FIG. A proximity sensor 4 for detecting a positional deviation of the metal belt 18 outside the allowable range in the direction perpendicular to the paper surface of FIG.
Two are provided.

A load-carrying device 44 is fixed to the upper surface of the support block 32 below and adjacent to an upper span (a portion extending substantially horizontally above the support block) of the metal belt 18 and adjacent thereto. Has been done. As shown in FIG. 2, the load carrying device 44 has a substantially frame-shaped upper casing 46 and a substantially dish-shaped lower casing 48 which are fastened and fixed to each other. A plate-shaped porous ceramic body 50 is fixed to the upper casing 46 by casting, and the ceramic body 50 cooperates with the upper gazing 46 and the lower casing 48 to define an internal space 52. Further, the upper casing 46 and the lower casing 48 respectively have support walls 46a and 48a extending in the inner space 52 in the moving direction of the metal belt and the direction perpendicular thereto, and the end faces of these supporting walls abut each other. ing. In particular, the support wall 46a has a notch 46b for interconnecting and interconnecting a plurality of internal spaces 52 which are partitioned from each other by the support walls 46a and 48a.

Compressed air is supplied to the inner space 52 from a compressed air supply source (not shown) via a nipple 54 fixed to the lower casing 48 and a conduit (not shown) connected thereto. It has become so.
Therefore, the load carrying device 44 ejects the compressed air supplied to the internal space 52 from the individual small holes of the porous ceramic body 50 toward the lower surface of the metal belt 18, and a high-pressure air film formed between the compressed air and the metal belt. Thus, the weight of the vehicle 56 is carried and frictional wear between the metal belt and the load carrying device 44 is reduced. The wheels 58 of the vehicle 56
Is placed on the metal belt 18 at a position corresponding to the center of the load carrying device 44.

As shown in FIG. 1, the support block 3
An electric motor 60 is fixedly arranged in the unit 2. A rotary shaft 62 of the electric motor 60 penetrates the support block 32 and extends perpendicularly to the paper surface of FIG. 1, and a pulley 64 is fixed to the tip thereof. Similarly, a pulley 68 is fixed to the rotary shaft 66 of the drive drum 14. These pulleys 64 and 68
A V-belt 70 as a driving force transmission means is wound around the drive drum 14, and the drive drum 14 is rotatably driven by the electric motor 60 via the V-belt 70.

As shown in FIG. 1, the support block 3
The base portion 2 is rigidly fastened and fixed to the base member 72. Thus, the support frames 28 and 30, the support block 32, and the pedestal member 72 cooperate with each other to form the drive drum 14.
Also, the driven drum 16 is rotatably supported, the load carrying device 44 is supported below the upper span of the metal belt 18 and adjacent thereto, and the electric motor 60 is fixedly supported between the two drums. The support device 74 is configured.

The support device 74 is arranged on and fixed to a positioning drive device 76. Positioning drive 7
6 is installed on the bottom surface 78 of a test device accommodation hole (not shown) provided on the floor 12 of the running test room.
Since the positioning drive device 76 does not form an essential part of the present invention, a detailed description thereof will be omitted. However, the positioning drive device 76 sees the test device 10 in the left and right directions and in the direction perpendicular to the paper surface of FIG. The test device can be moved up and down and the test device can be driven up and down.

As shown in FIG. 3, the shaft member 66A carrying the pulley 68 at one end is rotated around the axis 24 by a pair of bearings 82 carried by a bearing support member 80 fixed to the tip of the support frame 28. It is rotatably supported by. One end of the torque sensor 84 is fixedly connected to the other end of the shaft member 66A, and a hollow shaft member 66B extending along the axis 24 is fixedly connected to the other end of the torque sensor 85. There is. The shaft member 66B is rotatably supported around the axis 24 by a pair of bearings 90 carried by bearing support members 86 and 88 fixed to the support frame 28. One end of a hollow shaft member 66C extending along the axis 24 is rigidly connected to the other end of the shaft member 66B, and the shaft member 66C is fixed to the tip of the support frame 30 by a bearing support member 92. It is rotatably supported around the axis 24 by a bearing 94 carried by the.

A drum support member 96 is rigidly connected to the other end of the shaft member 66B. The drum support member 96 is fixed to the drive drum 14 and a pair of bearings 98 carried by the bearing support member 86. Is rotatably supported about the axis 24. A drum support member 100 is fixed to the drive drum 14, and the drum support member is rotatably supported about the axis 24 by a pair of bearings 102 carried by a bearing support member 92. A rotor disc 108 of a disc brake device 106 is rigidly fixed to the drum support member 100 via a ring member 104 that positions a bearing 102 on the right side in FIG. The caliper 110 of the disc brake device 106 is supported by the tip of the support frame 30. Further, a speed / acceleration detection sensor 114 is connected to the right end of the shaft member 66C in FIG. 3 by a coupling 112.

Thus, in the illustrated embodiment, the shaft member 6
6A, 66B, 66C cooperate with each other to form the rotary shaft 66 shown in FIG. 1, and bearings 82, 92, 94, 1
02 is the corresponding bearing support member 80, 86, 8
8 and 92 cooperate with each other to form the bearing device 20 shown in FIG.

In the illustrated embodiment, the driving force supplied from the electric motor 60 to the pulley 68 via the V belt 70 is driven via the shaft member 66A, the torque sensor 84, the shaft member 66B and the drum support member 96. The torque is transmitted to the drum 14, whereby the drive drum is rotationally driven around the axis 24, the drive torque in that case is detected by the torque sensor 84, and the rotational speed and acceleration of the drive drum are detected by the sensor 114. . Further, the braking force generated by the disc brake device 106 stops the rotation of the drive drum 14 as necessary, and prevents the rotation of the rotary drum 14 and the movement of the metal belt 18 when the vehicle is loaded. It has become so.

The electric motor 60 and the positioning drive device 76 are controlled by a control device (not shown). When it is detected by the optical sensor 40 that the metal belt 18 is displaced within the allowable range in the direction perpendicular to the paper surface of FIG. 1, the control device controls the bearing device 22 in FIG. The position of the metal belt is adjusted to a predetermined position by adjusting the position in the left-right direction when viewed, and the proximity sensor 42 causes the metal belt 1 to move.
When it is detected that 8 is displaced to the outside of the allowable range in the direction perpendicular to the paper surface of FIG. 1, the operation of the running test device is stopped by the control device.

FIG. 4 is a plan view showing the procedure of a running test carried out by installing the running test device constructed as described above in correspondence with each wheel of the vehicle. In FIG. 4, reference numerals of members corresponding to the right front wheel 58FR, the left front wheel 58FL, the right rear wheel 58RR, and the left rear wheel 58RL of the vehicle are FR and FL, respectively.
RR and RL are attached.

As shown in FIG. 4, first of all, the driving test devices 10FR, 10FL, 10RR, 10RL are positioned so that they are spaced from each other corresponding to the distance between the wheels of the vehicle 56 to be tested. The right front wheel 58FR, the left front wheel 58FL, the right rear wheel 58RR, and the left rear wheel 58RL of the vehicle are positioned by the running test devices 10FR, 10FL, 10R, respectively.
The vehicle is placed so that it is placed in the center of the R, 10RL,
Thereafter, although not shown in FIG. 4, the vehicle is restrained by a rope stretched between the vehicle and the wall of the running test chamber in the front-rear direction and the lateral direction of the vehicle.

When the preparation for the test is completed in this way, the engine of the vehicle is started and the drive wheels of the vehicle are rotated as in the case of normal road surface running. The metal belts of the running test device on which the drive wheels are mounted are driven by the drive wheels, and the metal belts of the running test device on which the driven wheels are mounted are substantially the same as the metal belts on which the drive wheels are mounted. It is driven by the corresponding electric motor 60 at the peripheral speed of, and thereby the constant speed straight traveling condition on the flat road of the vehicle is reproduced. Further, in this state, when the rotation speed of the drive wheels is increased, the acceleration state of the vehicle is reproduced, and conversely, when the rotation speed of the drive wheels is reduced, the deceleration state of the vehicle is reproduced.

Further, the traveling test device for each wheel is individually moved up and down by the corresponding positioning drive device to reproduce the bad road traveling and the wavy road surface traveling of the vehicle, and the height of the traveling test device for the left and right front wheels is left and right. By setting a height different from that of the rear wheel running test device, the vehicle's hill driving condition is simulated, and the right front and rear wheel running test devices have the same height as the left front and rear wheel running test devices. By setting the height to be different from the height of, the bank road traveling of the vehicle is simulated.

Further, when the steered wheels are steered, the metal belt of the running test device on the outer turning wheel side is set to be higher than the peripheral speed of the metal belt of the running test device on the inner turning wheel side, so that the vehicle is simulated. The turning state is reproduced.

FIGS. 5 and 6 show a second embodiment of the vehicle running test apparatus according to the present invention, which is constructed so as to be installed corresponding to a pair of left and right wheels of a vehicle, and the entire vehicle is mounted. It is a top view showing the point of the running test performed using the 3rd example of the running test device for vehicles by the present invention constituted.

In the second embodiment shown in FIG. 5, each of the running test devices 10F and 10R has a right and left front wheel 58, respectively.
It is configured so as to support the FL, 58FR and the left and right rear wheels 58RL, 58RR, and therefore the vehicle front-rear dimension of each running test device is substantially the same as the dimension of the first embodiment, but in the width direction. The dimension is set to be larger than that in the first embodiment.

Therefore, in the second embodiment, each wheel is not individually supported by the running test device, but a pair of left and right wheels are supported by the common running test device. Although it is not possible to reproduce road traveling, bank road traveling, etc., it is possible to reproduce constant speed straight traveling, acceleration / deceleration traveling, slope traveling, wavy road traveling, etc. as in the case of the first embodiment.

In the third embodiment shown in FIG. 6, the running test apparatus 10 has substantially the same widthwise dimension as the second embodiment so that it can support all four wheels of the vehicle. The vertical dimension is set longer than the vehicle wheelbase.

Therefore, in the third embodiment, since the vehicle is equivalent to the state of traveling on a substantially horizontal flat road, it is reproduced as compared with the cases of the first and second embodiments. Although there are many restrictions on the vehicle's running conditions, the vehicle will run at a constant speed in a straight line under conditions that are closer to the actual running conditions of the vehicle compared to when the test is performed with the wheels placed directly on the drum. The deceleration condition can be reproduced.

Although the present invention has been described above in detail with reference to specific embodiments, the present invention is not limited to these embodiments, and various other embodiments within the scope of the present invention. It will be apparent to those skilled in the art that

For example, in the illustrated embodiment, the load carrying device 44 is supplied with compressed air and the porous ceramic body 5 is
Since compressed air is ejected from each small hole of 0, when liquid such as water is used as a high-pressure fluid, safety problems such as splashing of droplets, electric leakage, and electric shock are caused. However, the high-pressure fluid supplied to the load-carrying device 44 may be a liquid such as high-pressure water, in which case compressed air will be used. As a result, the load carrying capacity of the load carrying device can be improved.

In the illustrated embodiment, the driving force transmitting means for transmitting the driving force of the electric motor 60 to the driving drum 14 is V.
Although it is the belt 70, the driving force transmitting means may be another belt such as a flat belt, any other driving force transmitting means such as a chain, a gear train.

[0040]

As is apparent from the above description, according to the present invention, the driving drum is rotatably driven by the electric motor supported by the supporting device via the driving force transmitting means. Since it is not necessary to connect a load device to the rotating shaft of the drum via a flywheel, the running test device can be made smaller and simpler than before, and the required test space is reduced. can do.

Further, it is possible to displace the running test device relative to the floor more easily than before, and it is possible to apply a load to the drive drum or positively rotate the drive drum by an electric motor. Therefore, it is possible to easily reproduce various traveling conditions including acceleration and deceleration as well as uneven road surfaces and slopes.

Further, since the load carrying device is designed to eject the high-pressure fluid onto the belt from the individual small holes of the substantially rigid porous body, the sliding member as in the conventional running test device is used. Since it is not necessary to form a large number of ejection holes having a very small cross-sectional area, and the pressure distribution of the fluid film formed between the porous body and the belt is very uniform,
It is possible to favorably support the weight of the vehicle and effectively prevent abrasion of the belt.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of a vehicle running test device according to the present invention, which is configured to be installed corresponding to each wheel of a vehicle.

2 is an enlarged vertical sectional view showing one embodiment of the load carrying device shown in FIG. 1. FIG.

FIG. 3 is an enlarged plan sectional view showing one embodiment of the drive drum shown in FIG.

FIG. 4 is a plan view showing the procedure of a running test performed using the first embodiment shown in FIG.

FIG. 5 is a plan view showing a point of a running test performed using a second embodiment of the running test apparatus for a vehicle according to the present invention, which is configured to be installed corresponding to a pair of left and right wheels of the vehicle. .

FIG. 6 is a plan view showing the procedure of a running test performed using a third embodiment of the running test apparatus for a vehicle according to the present invention, which is configured to mount the entire vehicle.

[Explanation of symbols]

 10 ... Running test device 12 ... Floor 14 ... Drive drum 16 ... Driven drum 18 ... Metal belt 44 ... Load carrying device 50 ... Porous ceramic body 56 ... Vehicle 58 ... Wheel 60 ... Electric motor 70 ... V belt 74 ... Supporting device 76 ... Positioning drive device 84 ... Torque sensor 106 ... Disc brake device 114 ... Speed and acceleration detection sensor

Claims (1)

[Claims] 1. A driving drum, a driven drum, a belt wound around the driving drum and the driven drum, a load carrying device arranged between the driving drum and the driven drum, and on a floor. And a supporting device for rotatably supporting the driving drum and the driven drum and supporting the load carrying device, wherein the driving drum is driven by an electric motor supported by the supporting device via a driving force transmission means. The load carrying device is adapted to be rotationally driven and includes a substantially rigid porous body disposed adjacent to and below an upper span of the belt. A vehicle running test apparatus, characterized in that a high-pressure fluid is ejected from the small holes to the belt.