JP2001289740A - Rough road running testing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a light-weight testing apparatus, capable of executing a continuous test to be tested easily by forming and reproducing projection parts formed by simulating a rough road surface by many kinds of programmed extensible/retractable modes of protruding portions on actuators installed on rotating drum mechanisms parts, in a rough road running testing device formed by simulating rough road surface encountered by a vehicle while running. SOLUTION: This testing device is characterized, by installing the actuators 21, 31 having projection-shaped protruding portions 22, 32 on the rotating drum mechanism parts 20, 30 installed in the rough road running testing device 1, and controlling by extending and retracting the protruding portion 22, 32 by the actuators 21, 31, to form the projection parts on the surfaces of the rotating drum mechanism part 20, 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary drum mechanism provided with a convex portion simulating a rough road surface for evaluating the damping force characteristics and durability of a vehicle suspension device or the like on a rough road surface encountered while the vehicle is running. The present invention relates to a rough road running test device that is performed by a test machine having a part.

[0002]

2. Description of the Related Art Generally, in order to evaluate the damping force characteristics and durability of a vehicle suspension system or the like, a course having unevenness assuming various road surfaces is installed outdoors, and the vehicle is selected by selecting a road surface for each evaluation item. We run and carry out. In addition, a detachable uneven member is attached to the outer peripheral surface of the rotating drum, as in a rough road running test apparatus disclosed in Japanese Patent Application Laid-Open No. 2-36331, and the uneven member surface and the vehicle wheel are connected to each other. In some cases, the rotary drum is rotated while touching the wheel to rotate the wheels of the vehicle to give vibration to the vehicle.

In this rough road running test apparatus, an uneven member having an uneven surface formed to simulate rough road conditions is fitted on an outer peripheral surface of a rotary drum provided in the rough road running test apparatus. A rough road running test is performed by rotating the rotating drum. The uneven member is divided into a plurality of sections in the axial direction of the rotary drum, and different uneven surfaces are formed in each section, and the rough road condition is set to be mild, medium, and rough.
The vehicle is simulated by moving the vehicle to the left or right depending on the severity.

[0004]

As described above, it is necessary to secure a vast site in an outdoor running test, and there is a problem that a change in road surface conditions due to weather or the like changes the evaluation environment outdoors. In addition, the evaluation by mounting results in the application of vibration while all the wheels are constantly rotating, and it is impossible to evaluate only the wheels to be evaluated. Further, in the rough road running test apparatus disclosed in Japanese Patent Application Laid-Open No. 2-36331, a plurality of sections are provided in the axial direction of the rotating drum to form different uneven surfaces. This imposes restrictions on the setting section of the rough road condition, and also necessitates moving the vehicle left and right. For this reason, the weight increases, and it takes time to replace the uneven member. Moreover, the vehicle is moved in the left-right direction (that is,
(The axial direction of the rotating drum).

The present invention solves such a problem and reproduces a convex portion simulating an actual road surface on the surface of a rotating drum installed indoors by controlling by programming, so that a large site is not required. It is an object of the present invention to provide a rough road running test device that can set various various rough road conditions without moving the vehicle to the left and right and can perform a continuous test without changing the test conditions.

[0006]

In order to achieve the above-mentioned object, the present invention has a rotating drum which rotates on wheels of a vehicle which is a test object, and a convex portion is provided on a surface of the rotating drum. In a rough road running test device having a structure in which the rotating drum is rotated to give vibration to the vehicle while applying rotation to wheels of the vehicle, an actuator having a convex projection is provided on the rotating drum, and the actuator is provided with the actuator. A protrusion is formed on the surface of the rotary drum by controlling the expansion and contraction of the protrusion.

The actuator is controlled so as to extend the projection at every predetermined number of rotations of the rotary drum, and to form a projection on the surface of the rotation drum at every predetermined number of rotations. It is characterized by the following.

The rotary drum is provided with two types, one for a front wheel and the other for a rear wheel of the vehicle, and the actuators provided on each of the rotary drums are used for testing the front wheel and the rear wheel. Accordingly, the protrusions are controlled so as to be extended or contracted, respectively.

In addition, a rotating drum is provided for rotating the wheel of the vehicle, which is a test object, and a convex portion is provided on the surface of the rotating drum. The rotating drum is rotated to apply rotation to the wheel of the vehicle. A rough road running test device having a structure for applying vibration to the vehicle, comprising: a rotation speed control means for controlling a rotation speed of the rotary drum; and an expansion / contraction control means for controlling expansion / contraction of a protrusion of the actuator. The expansion and contraction control means controls expansion and contraction of a protrusion of the actuator in accordance with a rotation speed of the rotary drum controlled by a speed control means.

[0010] Further, a rotating drum is provided for rotating the wheel of the vehicle as a specimen, and a convex portion is provided on the surface of the rotating drum, and the rotating drum is rotated to apply rotation to the wheel of the vehicle. In the rough road running test device having a structure for giving vibration to the vehicle, the device is characterized in that it has a convex attachment which is detachably attached to the rotating drum and simulates a road surface.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle rough road test apparatus according to a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall configuration diagram of a vehicle rough road test apparatus according to an embodiment of the present invention.
FIG. 2B is a side view, and FIG. 2 is a detailed AA cross-sectional view showing a rear rotary drum mechanism of the vehicle rough road running test device according to the first embodiment of the present invention. The components in the drawing mainly show the main members according to the present invention.

A rough road running test apparatus 1 for a vehicle according to a first embodiment of the present invention evaluates damping force characteristics and durability of a vehicle suspension device and the like on a rough road surface encountered while the vehicle is running. In this test, the wheel of the vehicle, which is the specimen, is brought into contact with a convex portion simulating a rough road surface provided on the surface of the rotating drum, and the rotating drum is rotated to apply vibration to the vehicle while rotating the wheel of the vehicle. Device.

As shown in FIG. 1, this rough road running test apparatus 1 has convex portions (actuators 21, 3) simulating a rough road surface.
1 formed by expanding and contracting the protruding portions 22, 32)
A rotating drum mechanism (front 20, rear 30) having
Hold frames (51, 52, 52) for fixing and holding the rotary drum mechanism (front portion 20, rear portion 30) via bearings and the like.
53, 54) and a rotating drum mechanism (front 20, rear 3)
0), a conduction belt (or roller chain) 56 for transmitting the rotation of the motor 55 to the rear rotary drum mechanism 30, and a front rotary drum mechanism for rotating the rear rotary drum mechanism 30. The transfer belt (or roller chain) 57 that conducts to the section 20 and the rotating drum mechanism section (the front section 20 and the rear section 30) are held by the hold frame (5).
1, 52, 53, 54) base 6 fixedly installed via
2, a fixing wire 61 for fixing and holding the vehicle 10 so as not to move in the left-right and front-rear directions, and a vehicle fixing portion 63 for pulling and fixing the fixing wire 61. The wheels (the front wheels 11a and the rear wheels 11b) of the vehicle 10, which is the specimen, have the front wheel 11a on the outer surface of the front rotary drum mechanism 20 and the rear wheel 11b on the outer surface of the rear rotary drum mechanism 30, respectively. When touched, vibration is given through the rotation of the rotating drum.

Further, the rear rotary drum mechanism 30 and the front rotary drum mechanism 2 provided in the rough road running test device 1 are provided.
0 is the same, and the outer diameter (πΘ) of the rotating drum is equal to the distance L between the rear rotating drum mechanism 30 and the front rotating drum mechanism 20. It is set to be small (πΘ <L), so that the phase of the rear rotary drum mechanism 30 and the front rotary drum mechanism 20 can be adjusted. The distance between the rear rotary drum mechanism 30 and the front rotary drum mechanism 20 is adjusted to the hold frame (51, 52, 53, 54) in accordance with the distance L between the front wheel 11a and the rear wheel 11b of various vehicles.
The position is adjusted (not shown) through the base member and is attached to the base 62.

The motor 55 is mounted and fixed to the hold frame 54 via a bearing (not shown), and rotates the shaft 55a directly connected to the motor 55 via a wheel (or sprocket) 42 through a transmission belt (or roller). chain)
At 56, the wheel (or sprocket) 42 of the rear rotary drum mechanism 30 is interlocked with the rear rotary drum mechanism 30.
To rotate. The rotation of the rear rotating drum mechanism 30 is
Conductive belt (or roller chain) as described below
At 57, the front rotary drum mechanism 20 is rotated in conjunction with the front rotary drum mechanism 20.

The hold frames 51 and 52 hold the front rotary drum mechanism 20 via bearings (not shown), and the rear rotary drum mechanism 30 shown in FIG. There are hold frames 54 and 53 that are supported by a hold, and each is formed of a thick plate-shaped metal material. Each of the hold frames (51, 52, 53, 54) is attached to a base 62 formed of a thick metal plate.

Rotary drum mechanism (front 20, rear 30)
Is composed of a front rotating drum mechanism section 20 and a rear rotating drum mechanism section 30, and the front rotating drum mechanism section 20 is
The rear rotating drum mechanism 30 corresponds to the rear wheel 11b of the vehicle 10 and has the same structure. Therefore, only the structure of the rear rotating drum mechanism 30 will be described with reference to FIG.

As shown in FIG. 2, the rear rotating drum mechanism 30 includes a projection 32 forming a projection, an actuator 31 for controlling expansion and contraction of the projection 32, and an actuator 31.
Drum body 35 holding the drum, and drum body 35
An outer peripheral sheet 36 simulating a flat road surface installed on the outer surface of the drum, and a holder 33 attached and fixed to the drum body 35
And support shafts 34 and 37 having shafts 34 a and 37 a attached to and fixed to the holder 33 and rotating the drum body 35.

The drum body 35 is formed of a resin material or the like in a cylindrical shape, and has a holder 3 on both end surfaces.
3 is formed with a counterbore 35a. The drum body 35 has holes 3 for inserting and arranging the actuators 31 from the inner peripheral surface 35c to the outer peripheral surface 35d.
A plurality of 5b are formed in at least one row in the rotation axis direction of the drum main body 35 and are arranged in parallel or alternately in the circumferential direction, and the outer peripheral surface 36d is fitted with an outer peripheral sheet 36 simulating a flat road surface.

The holder 33 is made of a metal plate or the like in the shape of a thick plate, and has a counterbore 33b at one end into which a support shaft 34 is fitted. It is inserted and fitted into the counterbore 35a and is attached and fixed to the drum main body 35.

The support shaft portion 34 is formed of a metal material or the like, with one end attached to the holder 33 and fixed to a thick disk, and the other end formed on a cylindrical shaft portion 34a.
The support shaft portion 34 has a disk-shaped outer peripheral surface 34 b
3 and is fixed to the holder 33 by being inserted and fitted into the counterbore 33b. The support shaft 34 is a drum body 35
Is rotated integrally with the support shaft 37 on the opposite side via a bearing 44. The shaft is rotated by the motor 55, and the rear rotary drum mechanism 30 is rotated.

The shaft (34a) has a wheel (or sprocket) (41) between a disk-shaped one end surface (34c) and a bearing (44) fitted in the hold frame (54).
The rotation of the rear rotary drum mechanism 30 is linked to the front rotary drum mechanism 20 via a conductive belt (or a roller chain) 57 by the wheels 41. A wheel (or sprocket) 42 is inserted and fixed to the shaft portion 34a at an outer end portion that is inserted and fitted into a bearing 44 fitted into the hold frame 54, and the rotation of the motor 55 is transmitted by the wheel 42. Conducted through a belt (or roller chain) 56,
The rear rotating drum mechanism 30 rotates.

The support shaft 37 is formed of a metal plate or the like, with one end fixed to the holder 33 being a thick disk and the other end being formed into a cylindrical shaft 37a.
The support shaft portion 37 has a disk-shaped outer peripheral surface 37 b that is the holder 3.
3 and is fixed to the holder 33 by being inserted and fitted into the counterbore 33b. The support shaft 37 is provided on the drum body 35.
Is a shaft that is rotated integrally with the support shaft portion 34 on the opposite side.

The actuator 31 extends a projection 32 corresponding to a projection simulating a bad road surface from the surface of the outer peripheral sheet 36 provided on the outer surface of the drum main body 35 to the outside. Are controlled so as to contract in the opposite direction.
Are arranged and fixed in at least one row in the direction of the rotation axis and in parallel or alternately in the circumferential direction. The expansion and contraction of the actuator 31 is controlled based on a mode programmed by the main controller 71, and the expansion and contraction stroke is also controlled in several modes assuming an actual rough road surface.

The projection 32 is formed in a cylindrical shape with a metal material or the like, and is fixedly attached to the actuator 31. The surface of the protrusion 32 is provided with a coating simulating a rough road surface. Further, the projection 32 according to the present embodiment has a cylindrical shape. However, the projection 32 simulating a rough road surface may have a rectangular shape or a hemispherical shape.

The outer peripheral sheet 36 is formed of a metal material or the like in a thin plate shape, and its surface is provided with a coating simulating a flat road surface. The outer peripheral sheet 36 is fitted and mounted on the outer surface of the drum body 35.

The hold frame 54 holds and supports the rear rotary drum mechanism 30 via a bearing 44. The hold frame 54 conducts and rotates the rear rotary drum mechanism 30 in response to rotation from a motor 55, and transmits the rotation to the front. It is used on the side that conducts to the rotary drum mechanism 20 and is installed on the base 62. The hold frame 54 is formed of a metal material or the like in a rectangular parallelepiped shape, and has a hole into which a bearing (not shown) for holding rotation of a shaft directly connected to the motor 55 is press-fitted, and a rotation of the rear rotary drum mechanism 30. A hole into which the bearing 44 to be held is press-fitted, and a screw hole into which the fixing fitting 43 for pressing the bearing 44 is attached and fixed are provided.

The hold frame 53 supports the front rotary drum mechanism 20 via a bearing 46 and is mounted on a base 62. The hold frame 53 is formed of a metal material or the like in a rectangular parallelepiped shape.
A screw hole for mounting and fixing a fixing fitting 45 for pressing the bearing 46 is provided.

The wheel (or sprocket) 42
The motor 55 is fixedly inserted into the shaft portion 34 a of the support shaft portion 34.
Is transmitted through a conductive belt (or a roller chain) 56 to rotate the rear rotating drum mechanism 30. The wheel 42 has a hole 42a at the center portion thereof for insertion and fixing to the shaft portion 34a of the support shaft portion 34, and a V-shaped groove 42b at the outer peripheral portion thereof against which the conductive belt 56 is pressed.
Are formed of a metal material or the like provided on the entire circumference.

The wheel (or sprocket) 41 is
It is inserted into and fixed to the shaft portion 34a of the support shaft portion 34, and is used to transmit the rotation of the rear rotary drum mechanism 30 to the front rotary drum mechanism 20 via the conductive belt (or roller chain) 57. It is. This wheel 41
A hole 41a for insertion and fixing to the shaft portion 34a of the support shaft portion 34 is provided in the center portion, and a V-shaped groove 41b for pressing the conduction belt 57 is provided in the outer peripheral portion. ing.

Next, the test controller 70 of the rough road running test device
Will be described with reference to FIG. FIG. 3 is a block diagram showing a control control of the vehicle rough road running test device according to the first embodiment of the present invention. The conduction by the mechanical system is indicated by a two-dot chain line.

First, the test controller 70 of the rough road running test device
Will be described.

The test control of the rough road running test apparatus includes a control block A for controlling the expansion and contraction of the actuators 21 and 31 based on the mode programmed by the main controller 71, and a rotary drum mechanism 3 based on the servo driver 81.
It is divided into a control block B for controlling rotation of 0 and 20. Then, each control block can be controlled independently, or each control block can be controlled in combination.

In the test control operation controlled by this combination, the rotational speeds of the rotary drum mechanism units 30 and 20 and the expansion and contraction modes of the actuators 31 and 21 can be combined in various types. It is possible to create a program that simulates the conditions on a rough road to be encountered.

The test controller 70 simulates the running speed of the vehicle and the rough road conditions encountered while the vehicle is running, and simulates the rotation speeds of the rotating drum mechanism units 30 and 20 and the projections 32 and 22. Actuator 3 having
A main controller 71 having a function of transmitting command signals for controlling the expansion and contraction of the actuators 21 and 31 based on the expansion and contraction command signals from the main controller 71;
A control block A for controlling the expansion and contraction of the
And a control block B for controlling the rotation of 0.

The control block A includes a main controller 7
1 expansion / contraction command signal
a, rotating drum mechanism units 20 and 30 for connection and transmission to 73b
Rotary joint 72 attached and fixed to the rotary shaft
a, 72b, actuator controllers 73a, 73b for controlling the expansion and contraction of the actuators 21, 31 based on the expansion and contraction command signals, the actuators 21, 31 provided with the projections 32, and the expansion and contraction states of the projections 32, Position detector 7 for detecting based on the state of 31
5a, 75b, and a phase adjuster 74 for shifting the phases of the expansion and contraction state of the actuator 31 of the rear rotary drum mechanism section 30 and the expansion and contraction state of the actuator 21 of the front rotary drum mechanism section 20.

The control block B includes a main controller 7
1, a servo driver 81 that drives and controls the motor 55 based on the rotation command signal, a motor 55 that drives the rear rotating drum mechanism 30 to rotate, and a rotation angle detector 82a that detects the rotation angle of the rear rotating drum mechanism 30. A rotation angle detector 82b for detecting a rotation angle of the front rotary drum mechanism unit 20,
Rotation angle detected by rotation angle detector 82a and rotation angle detector 8
A phase difference adjustment setting unit 83 for determining whether or not the difference between the rotation angle detected in step 2b and the rotation angle is within a range of a predetermined phase shift angle and restoring the difference to an initial set value. .

The main controller 71 controls the rotational speeds of the rotary drum mechanisms 30 and 20 and the actuators 31 and 2.
A program combining a number of expansion modes (e.g., corresponding to a rotational speed of the rotary drum mechanism units 30 and 20 corresponding to a vehicle traveling speed of 30 ° / h, corresponding to a moderately rough road surface). Actuators 31 and 2
The data and the like of the convex portions formed by extending or contracting the first protruding portions 32 and 22 are input to the main controller 71,
This is a processing control unit that creates a programmed one and simulates conditions on a rough road that are actually encountered while the vehicle is traveling.

The command signal programmed from the main controller 71 is transmitted to the actuators 31 and 21.
Expansion / contraction command signals (for example, the numbers of the plurality of actuators 31 and 21 and the corresponding ON
(Data indicating extension) or OFF (reduction) and a rotation command signal (for example, a signal based on rotation speed data) for controlling the rotation of the rotating drum mechanism units 30 and 20.

Actuator controllers 73a, 73
b denotes a hydraulic control valve, a spring, a hydraulic tank, an expansion / contraction command signal to the actuators 31, 21 and actuators 31, 2 detected by the position detectors 75a, 75b.
1 is compared with a feedback signal indicating the expansion / contraction state (for example, when the projection of the actuator is extended by data indicating ON of the expansion / contraction command signal, it is confirmed whether the projection is actually extended by a feedback signal) and expanded / contracted. It is composed of a control unit and the like (not shown) for controlling the states so as to match. The actuator controllers 73a and 73b are connected to the main controller 7
A plurality of actuators 31 and 21 (comprised of hydraulic cylinders and the like) are driven via hydraulic control valves based on expansion / contraction command signals from
It controls the expansion and contraction of the projections 32 and 22 provided on the first and the first 21.

In other words, in the expansion / contraction control when the road surface is a moderately rough road, the actuator controller 73
a and 73b are based on the numbers of the specific actuators 31 and 21 included in the expansion / contraction command signal and the data indicating ON corresponding thereto, based on the numbers of the actuators 31 and 21 installed on the rotating drum mechanism units 30 and 20. The actuator 3 corresponding to the data indicating OFF by extending the protruding portions 32, 22 of the specified several actuators 31, 21
1, 21, ie other actuator 3 not specified
Control is performed so as to shorten 1 and 21. The power source for expanding and contracting the actuators 31 and 21 by the actuator controllers 73a and 73b is not limited to a hydraulic power source, but may be an electromagnetic type using a solenoid, a compressed air type, or a screw mechanism.

The phase adjuster 74 expands and contracts the actuator 21 of the front rotary drum mechanism 20 in accordance with the phase in which the bad road surface encountered by the vehicle is shifted according to the distance L between the front wheel 11a and the rear wheel 11b of the vehicle. The signal from the phase adjuster 74 is transmitted to the actuator controller 73b. That is, in a situation where the vehicle travels straight, the road surface encountered by the front wheels 11a is
The phase is shifted so as to be encountered when the rear wheel 11b has advanced by the distance L.

The phase difference adjustment setting device 83 includes a phase adjustment device 74.
Similarly, the bad road surface that the vehicle encounters is the front wheel 11 of the vehicle.
This adjusts the phase that is shifted according to the distance L between the a and the rear wheel 11b. It is set as a set value and adjusted via the conduction belt 57. And this phase shift angle is periodically
The difference between the rotation angle detected by the rotation angle detector 82a of the rear rotary drum mechanism unit 30 and the rotation angle detected by the rotation angle detector 82b of the front rotary drum mechanism unit 20 is the phase difference adjustment setting unit 83 Is compared with a predetermined value. If the angle difference deviates from the initially set predetermined value range due to a failure or the like, the angle difference is restored to the initial set value via the conduction belt 57.

As shown in FIG. 2, the rotation angle detector 82a press-fits the rotor of the rotation angle detector 82a into the shaft 37a of the support shaft 37 used for rotating the rear rotating drum mechanism 30. The stator part of the rotation angle detector 82a is fixedly attached to the fixture 45 fixedly attached to the hold frame 53, and the angle at which the shaft part 37a of the support shaft part 37 rotates is determined by the rotor part of the rotation angle detector 82a. And between the stator part.

Next, a description will be given of a test control operation for controlling in combination.

First, the main controller 71 stores test data simulating a rough road encountered while the vehicle is traveling (various rotational speed data for the rotating drum based on the traveling speed of the vehicle,
Inputs various types of expansion / contraction data to the actuator based on the rough road to be encountered, and creates a control program. And
An expansion / contraction command signal is transmitted to a control block A that controls the expansion and contraction of the actuators 21 and 31, and a rotation instruction signal is transmitted to a control block B that controls the rotation of the rotary drum mechanism units 30 and 20.

In the expansion / contraction command signal to the control block A, the expansion / contraction command signal from the main controller 71 programmed to control the expansion / contraction of the actuators 31 and 21 is transmitted to the rear rotary drum mechanism 30 and the front rotary drum mechanism 20. One is connected to an actuator controller 73a through a rotary joint 72a installed in the rear rotary drum mechanism 30, and the other is a rotary joint installed in the front rotary drum mechanism 20 via a phase adjuster 74. The data is transmitted to the actuator controller 73b through 72b.

In the actuator controller 73a,
A plurality of the expansion / contraction command signals are output to and transmitted to the actuator 31 which is arranged in the drum main body 35 and arranged in parallel or alternately in the circumferential direction in at least one row in the rotation axis direction of the drum main body 35. The plurality of actuators 31 expand and contract the plurality of projections 32 based on the programmed expansion and contraction command signal. The state of the expanded and contracted protrusion 32 is detected by the position detector 75a, and is fed back to the actuator controller 73a to control the expansion and contraction. When a failure occurs in the expansion and contraction, the failure signal is fed back from the actuator controller 73a to the main controller 71, and a self-diagnosis function at the time of failure or the like is provided.

In the actuator controller 73b,
An expansion / contraction command signal whose phase has been adjusted is input through the phase adjuster 74 for the front rotary drum mechanism 20, and a plurality of the expansion / contraction command signals are provided in the drum main body in at least one line in the rotation axis direction of the drum main body. , Which are mounted and fixed in a circumferentially parallel or staggered arrangement
1 and send the output. The plurality of actuators 21 expand and contract the plurality of protrusions 22, respectively, based on the programmed expansion / contraction command signal. The state of the expanded and contracted protrusion 22 is detected by the position detector 75b, and is fed back to the actuator controller 73b to control the expansion and contraction. If a malfunction occurs in the expansion and contraction, the malfunction signal is sent to the actuator controller 73.
b is fed back to the main controller 71 to provide a self-diagnosis function at the time of failure or the like.

Next, as a rotation command signal to the control block B, a rotation command signal from the main controller 71 programmed to control the rotation of the rotary drum mechanism units 30 and 20 is transmitted to the servo driver 81.

The servo driver 81 drives the motor 55 based on the rotation command signal, and rotates the shaft 55a directly connected to the motor 55. This rotation of the shaft 55a
And a wheel 4 inserted and fixed to a shaft portion 34a of a support shaft portion 34 provided on the rear rotating drum mechanism 30 via a conductive belt 56 and a wheel 42 fixed to the
2, and the rear rotating drum mechanism 30 rotates by conduction. The rotation angle of the rear rotating drum mechanism 30 is detected by a rotation angle detector 82a attached to and fixed to the rear rotating drum mechanism 30, and the detected angle signal is fed back to the servo driver 81 to input and output signals. The rotation is controlled so that the angle signal difference becomes zero. Further, the detected angle signal is transmitted to the phase difference adjustment setting device 83.

The rotation of the rear rotary drum mechanism 30 is performed via the wheel 41 and the conductive belt 57 inserted and fixed to the shaft 34a of the support shaft 34, as shown by the two-dot chain line in FIG. The power is transmitted to a wheel (not shown) inserted and fixed to a shaft provided in the rotary drum mechanism 20, and the front rotary drum mechanism 20 is rotated.

The rotation angle of the front rotary drum mechanism section 20 is detected by a rotation angle detector 82b attached to and fixed to the front rotary drum mechanism section 20, and the detected angle signal is converted to a phase difference adjustment setting section. 83 and is compared with the detected angle signal from the rear rotating drum mechanism 30. This comparison is based on the phase difference (the front wheel 1
This is to provide a function of restoring the phase difference at the time of initial setting, for example, in the case where a mismatch occurs between the first wheel 1a and the rear wheel 11b. This phase difference adjustment setting device 83 is associated with the phase adjustment device 74.

Thus, in the present rough road running test device, the convex portion provided on the actuator is provided on the actuator based on various telescopic modes programmed by the main controller by simulating the rough road surface encountered while the vehicle is running. Control by controlling the expansion and contraction of the actuator and the various rotation speeds of the rotary drum mechanism. Can be implemented by programming, so that a large-scale site is not required, the vehicle does not need to be moved in the left-right direction, and a continuous test that is lightweight and hassle-free for testing can be performed. Further, the rotary drum is provided with two types, one for the front wheel and the other for the rear wheel of the vehicle, and a plurality of projections are individually programmed with a plurality of actuators to form a bad road surface by expansion and contraction control. Since the wheels to be subjected to the test can be freely selected, the test can be performed at low cost and with little waste.

Next, a vehicle rough road test apparatus according to a second embodiment of the present invention will be described with reference to the drawings.

FIGS. 4A and 4B are external views showing a rotating drum mechanism of a vehicle rough road test apparatus according to a second embodiment of the present invention, wherein FIG. It is a road ground state diagram.

As shown in FIG. 4, the apparatus for testing a vehicle on a rough road according to the second embodiment of the present invention is different from that of the first embodiment in that Extends the projections 22, 32 provided on the actuators 21, 31 outwardly from the surface of the rotating drum at predetermined intervals of rotation of the rotating drum mechanism units 20, 30, and projects the convex surface to the surface of the rotating drum at a predetermined interval. The simulation is performed by simulating a case where a vehicle passes through a stepped road at a pier joint part where a vehicle encounters. Therefore, the configuration and the like of the apparatus for testing a vehicle on a bad road according to the second embodiment of the present invention are the same as those according to the first embodiment, and thus the description thereof is omitted.

According to the second embodiment of the present invention, for example, the conditions of the interval of the pier joint stepped road are 30 m, the outer diameter of the rotating drum is 1 m, and the speed of the vehicle is 40 km / h. When input to the controller 71,
The main controller 71 determines that the number of rotations of the rotating drum is about once every 9.6 times (that is, about 2.7 seconds in time),
The actuators 21 and 31 installed in at least one row in the rotation axis direction of the rotating drum are driven, and the protrusions 22 and 32 provided on the actuators 21 and 31 are controlled to be extended (they are installed in one row to be driven). The parts other than the actuators 21 and 31 are contracted in the outer peripheral surface of the rotating drum). At this time, the arrangement of the projections 22 and 32 provided on the actuators 21 and 31 for controlling the expansion and contraction is assumed to be arranged in the axial direction of the rotating drum as shown in FIG.

This makes it possible to freely set the number of rotations of the rotary drum mechanism and the timing of controlling the expansion and contraction of the projection provided on the actuator, so that it can be matched to a rough road such as a pier joint stepped road that is actually encountered by a vehicle. Test can be simulated, and low cost and highly reliable test can be performed.

Next, a vehicle rough road test apparatus according to a third embodiment of the present invention will be described with reference to the drawings.

FIG. 5 is a detailed sectional view showing a rear rotating drum mechanism of a vehicle rough road test apparatus according to a third embodiment of the present invention.

As shown in FIG. 5, the vehicle running test apparatus according to the third embodiment of the present invention is different from that according to the first embodiment in that a convex portion simulating a rough road surface is provided. A detachable attachment is used instead of controlling the expansion and contraction of the projection provided on the actuator used for the formation. Therefore, the apparatus for testing a rough road on a vehicle according to the third embodiment of the present invention has the same configuration as the apparatus according to the first embodiment except for the rotary drum mechanism. explain. The components in the figure mainly show the main members according to the present invention.

The rotating drum mechanism of this rough road running test device includes a front rotating drum mechanism and a rear rotating drum mechanism 90.
And the front rotating drum mechanism section is the front wheel 1 of the vehicle 10.
1a, the rear rotary drum mechanism 90 corresponds to the rear wheel 11b of the vehicle 10, and their respective structures are the same. Therefore, only the structure of the rear rotary drum mechanism 90 will be described with reference to FIG.

As shown in FIG. 5, the rear rotating drum mechanism section 90 includes detachable attachments 91, 9 forming projections.
2 and fixed boss 9 for attaching and detaching attachments 91 and 92
3, a drum body 95 to which the fixing boss 93 is fixed,
An outer peripheral sheet 94 simulating a flat road surface provided on the outer surface of the drum main body 95, a holder 96 fixed to the drum main body 95, and a shaft part 97 a mounted and fixed to the holder 96 and rotating the drum main body 95. And the like.

The drum body 95 is formed of a resin material or the like in a cylindrical shape, and has a holder 9 on each end surface.
A counterbore hole 95a into which the hole 6 is fitted is formed. A plurality of holes 95b for inserting and fixing the fixing boss 93 from the inner peripheral surface 95c to the outer peripheral surface 95d are formed in the drum main body 95, and an outer peripheral sheet 94 simulating a flat road surface is fitted into the outer peripheral surface 95d. Have been.

The holder 96 is made of a metal plate or the like in the shape of a thick plate, and has a counterbore 96b at one end into which the support shaft 97 is fitted. It is inserted and fitted into the counterbore 95a and is attached and fixed to the drum main body 95.

The support shaft portion 97 is formed of a metal plate or the like, with one end fixed to the holder 96 formed into a thick disk shape and the other end formed into a cylindrical shaft portion 97a.
The support shaft portion 97 has a disk-shaped outer peripheral surface 97 b formed by the holder 9.
6 and fitted and fixed to the holder 96 by being inserted and fitted into the counterbore 96b. The support shaft 97 is provided on the drum body 95.
Is integrated with a support shaft (not shown) on the opposite side to form a bearing 4
The shaft rotates through the motor 4 and receives rotation from the motor 55 to conduct and rotate the rear rotating drum mechanism 90.

The shaft (97a) has a wheel (or sprocket) (41) between the disc-shaped one end surface (97c) and the bearing (44) fitted in the hold frame (54).
The rotation of the rear rotary drum mechanism section 90 is interlocked with the front rotary drum mechanism section (not shown) via the conductive belt (or roller chain) 57 by the wheel 41. Further, a wheel (or sprocket) 42 is inserted and fixed to the shaft portion 97 a at an outer end portion which is inserted and fitted into the bearing 44 fitted in the hold frame 54, and the rotation of the motor 55 is transmitted by the wheel 42. The power is transmitted through the belt (or roller chain) 56, and the rear rotating drum mechanism 90 rotates.

The fixing boss 93 is formed of a metal material or the like having a screw hole 93a provided at the center thereof.
Is pressed into the hole 95b of the drum body 95 and the drum body 9
5 is fixed. The fixing boss 93 allows attachments 91 and 92 to be attached to and detached from the drum body 95 by screwing the attachments 91 and 92 into screw holes 93a, respectively. Further, a plurality of the fixing bosses 93 are fixedly arranged in the drum main body 95 in at least one row in the rotation axis direction of the drum main body 95 and arranged in parallel or alternately in the circumferential direction.

The attachments 91 and 92 are formed of a metal material or the like, with projections 91b and 92b provided at one end and screw portions 91a and 92a provided at the other end. This attachment 9
1, 92 can be independently attached and fixed to a plurality of fixed bosses 93 incorporated in the drum main body 95. Simulated convex portions are formed. Therefore, when the road surface is a rough road, a large number of attachments 91 and 92 are simulated on the rough road and mainly the attachment 92.
When the road surface is a rough road, the simulation can be performed with the attachment 91 as the main attachment and the small number of attachments 91 and 92 attached and the remaining attachments 91 and 92 removed. . The surfaces of the projections 91b and 92b are provided with a coating simulating a rough road surface.

Further, the shapes of the projections 91b and 92b are different from each other, and other than the one according to the present embodiment, a convex shape simulating a rough road surface may be a square shape or a hemispherical shape.

The outer peripheral sheet 94 is formed of a metal material or the like in a thin plate shape, and its surface is provided with a coating simulating a flat road surface. The outer peripheral sheet 94 is fitted and installed on the outer surface of the drum body 95.

Other components (hold frame 54,
Wheels 41, 42, motor 55, conduction belts 56, 5
7) are the same as those according to the first embodiment, and a description thereof will be omitted.

Thus, in the present rotary drum mechanism, the convex portion simulating the rough road surface is formed by using various attachments, and these various attachments are easily attached to and detached from the fixed boss 93 built in the drum main body. Since it is made possible, the structure can be simplified, the weight can be reduced, and the cost can be reduced.

[0076]

As described above, according to the present invention, the present rough road running test apparatus includes various types of expansion and contraction programmed by the main controller to simulate a rough road surface encountered while the vehicle is running. Because the protrusions provided on the actuator are controlled to expand and contract based on the mode, simulations that are close to the rough roads actually encountered by vehicles can be performed,
In addition, since control combining the expansion / contraction control unit of the actuator and the rotation control unit that controls the various rotation speeds of the rotating drum mechanism can be realized by programming, there is no need for a large site and the vehicle does not move in the left and right direction,
It is lightweight and enables continuous testing that does not require much testing. Further, the rotary drum is provided with two types, one for the front wheel and the other for the rear wheel of the vehicle, and a plurality of projections are individually programmed with a plurality of actuators to form a bad road surface by expansion and contraction control. Since the wheels to be subjected to the test can be freely selected, the test can be performed at low cost and with little waste.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a vehicle rough road test apparatus according to an embodiment of the present invention.

FIG. 2 is a detailed AA cross-sectional view showing a rear rotating drum mechanism section of the vehicle rough road test apparatus according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing control and control of the vehicle rough road test apparatus according to the first embodiment of the present invention.

FIG. 4 is an external view illustrating a rotary drum mechanism of a vehicle rough road test apparatus according to a second embodiment of the present invention.

FIG. 5 is a detailed sectional view showing a rear rotating drum mechanism of a device for testing a vehicle on a rough road according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Unfavorable road running test apparatus 10 ... Vehicle 11 ... Wheel 20 ... Front rotating drum mechanism part 21, 31 ... Actuator 22, 32 ... Projection part 30 ... Rear rotation Drum mechanism 33 Holder 34, 37 Support shaft 35 Drum main body 36 Outer peripheral sheet 41, 42 Wheel (or sprocket) 43, 45 Fixing bracket 44 , 46 ... bearings 51, 52, 53, 54 ... hold frame 55 ... motor 56, 57 ... conduction belt (or roller chain) 61 ... fixed wire 62 ... base 63 ..Vehicle fixing part 70 ... Test control part 71 ... Main controller 72 ... Rotary joint 73 ... Actuator controller 74 ... Phase adjuster 75 ... Position Detector 81: Servo driver 82: Rotation angle detector 83: Phase difference adjustment setting device 91, 92: Attachment 93: Fixed boss 94: Outer peripheral sheet 95: Drum body 96: Holder 97: Support shaft

Continuation of the front page (72) Inventor Hideo Itoigawa 1-2-28 Goshodori, Hyogo-ku, Kobe-shi, Hyogo Inside Fujitsu Ten Co., Ltd. (72) Inventor Koichi Omote 1-2-28, Goshodori, Hyogo-ku, Kobe-shi, Hyogo No. Within Fujitsu Ten Co., Ltd. (72) Inventor Yasuhiro Hayakawa 1-2-28 Goshodori, Hyogo-ku, Kobe City, Hyogo Prefecture Inside Fujitsu Ten Co., Ltd. (72) Naoto Yoshimura, 1-2-1, Goshodori, Hyogo-ku, Kobe City, Hyogo Prefecture No. 28 Inside Fujitsu Ten Limited

Claims (5)

[Claims] 1. A rotating drum which rotates by mounting a wheel of a vehicle as a test object, a convex portion is provided on a surface of the rotating drum, and the rotating drum is rotated to apply rotation to a wheel of the vehicle. In a rough road running test device having a structure for applying vibration to the vehicle, an actuator having a convex protrusion is provided on the rotary drum, and the protrusion is controlled to expand and contract by the actuator to form a convex on the surface of the rotary drum. A rough road running test device characterized by being formed. 2. The actuator according to claim 1, wherein the actuator is controlled so as to extend the protrusion at every predetermined number of rotations of the rotary drum, and forms a projection on the surface of the rotation drum at every predetermined number of rotations. The rough road running test device according to claim 1, wherein: 3. The rotary drum is provided with two types, one for a front wheel and the other for a rear wheel of the vehicle, and the actuators provided on each of the rotary drums are used for testing the front wheel and the rear wheel. 2. The rough road running test device according to claim 1, wherein the protrusions are controlled so as to extend or contract, respectively. 4. A rotating drum which rotates by mounting a wheel of a vehicle as a test object, a convex portion is provided on a surface of the rotating drum, and the rotating drum is rotated to apply rotation to wheels of the vehicle. A rough road running test device having a structure for applying vibration to the vehicle, comprising: a rotation speed control unit configured to control a rotation speed of the rotary drum; and an expansion / contraction control unit configured to control expansion / contraction of a protrusion of the actuator. A rough road running test device, wherein the expansion / contraction control means controls expansion / contraction of a protrusion of the actuator in accordance with a rotation speed of the rotary drum controlled by speed control means. 5. A rotating drum which rotates by mounting a wheel of a vehicle as a test object, a convex portion is provided on a surface of the rotating drum, and the rotating drum is rotated to apply rotation to a wheel of the vehicle. A rough road running test device having a structure for applying vibration to the vehicle, comprising a convex attachment movably attached to the rotating drum and simulating a road surface.