JP4172545B2 - Vehicle performance test equipment - Google Patents

Description

  The present invention relates to a vehicle performance test apparatus for testing a vehicle performance by placing a wheel on a single-axis drum and rotating it, such as a single-axis chassis dynamometer and a single-axis drum tester.

  In the single-axis chassis dynamometer, it is necessary to accurately and smoothly place the wheel directly on the drum. For this purpose, a centering device as shown in Patent Document 1 has been conventionally used. This centering device is configured to project a pair of rollers (positioning members) obliquely from front and rear ends of an opening facing a drum provided on a floor surface. With such a configuration, the pair of rollers project from the bottom of the floor so that the wheel fitted in the opening is lifted directly above the drum and is supported from the front and back to set the wheel axis directly above the drum axis. At the same time, after the vehicle is fixed by the vehicle fixing tool in this state, the pair of rollers are configured to be separated from the wheels and retract below the floor.

By the way, an air cylinder has been conventionally used for the forward / backward drive mechanism of this roller, but since the stroke amount of the air cylinder is fixed, it responds to a request to change the protrusion amount of the roller according to the diameter of the wheel. I can't. Of course, it is possible to make the protrusion amount of the roller variable by arranging a plurality of air cylinders with different stroke amounts and selectively operating them, but the structure becomes complicated and the protrusion amount of the roller is stepwise. There is a drawback that it can only be changed. Therefore, recently, an electric cylinder has been developed in which a roller is driven back and forth. In the case of using this electric cylinder, when controlling the protruding amount of the roller, for example, the operator manually checks the protruding state of the roller for each vehicle, and manually when the rollers come in contact from the front and rear of the wheel. The operation of the cylinder is stopped.
JP 2001-116660 A

  However, in recent vehicle performance tests, there is an increasing demand for unmanned or fully automated including not only running tests but also transportation and installation of vehicles to the chassis dynamometer. Such a centering device cannot satisfy the request. In other words, the use of an air cylinder has the disadvantage that it cannot handle when the vehicle changes (when the wheel diameter changes), and even when using an electric cylinder, an operator is required during centering. There is.

  Accordingly, the present invention is a vehicle performance test apparatus capable of automatically installing a wheel immediately above a single-axis drum and easily adapting to full automation in a vehicle performance test in order to solve the above-described problems all at once. The main intended task is to provide

  That is, the vehicle performance test apparatus according to the present invention is for performing a vehicle performance test by rotating a wheel placed on a uniaxial drum,

  A pair of positioning members arranged before and after a vertical line passing through the axis of the drum;

  A drive mechanism for driving each positioning member in a direction including at least a front-rear direction component so that the wheel can be pressed;

  A contact sensor (not shown) that outputs a contact signal indicating that when the positioning member and the wheel are pressed and contacted with a predetermined force;

  A position sensor (not shown) that detects the position of the positioning member and outputs it as position information;

  A control mechanism that controls the drive mechanism and moves each positioning member between an operating position where the axis of the wheel can be positioned on the vertical line and a non-operating position that does not contact the wheel;

Wherein the control mechanism, showing the default operating position that is set in the past of the contact signal all SANYO for setting the position obtained as the operating position from the position sensor at the time of output, each vehicle to be tested A default operation position information storage unit that stores predetermined operation position information in pairs with a vehicle identifier for identifying a vehicle, a vehicle identifier reception unit that receives a vehicle identifier of a vehicle to be tested, and the vehicle identifier reception unit And a default operating position information acquisition unit that acquires the default operating position information corresponding to the vehicle from the default operating position information storage unit based on the vehicle identifier received in step (b) .

  Here, “at least in the front-rear direction” includes, for example, movement such as a front diagonally upward and a rear diagonally downward. The front and rear refers to the front and rear direction when the vehicle is installed.

  In such a case, since the operation position is automatically set by a contact signal from the contact sensor, automatic centering can be performed on a vehicle having wheels of any diameter without being operated by the operator. . Further, in the case of automation, a function for notifying an unexpected problem is indispensable. However, since position information of the positioning member can be obtained by a position sensor, for example, the same vehicle (of the same type) (Including vehicles) in the past, store the operating position information set in the past, and compare the past operating position information with the current one to detect abnormalities in wheel air pressure, test vehicle not installed or incorrect, etc. Will be able to.

  Specifically, in order to suitably detect the above-described abnormality, mistake, etc., predetermined operation position information indicating a predetermined operation position determined in advance by the vehicle to be tested, and an operation determined by the operation position adjustment mechanism A position difference information output unit that compares operation position information indicating a position and outputs position difference information that is a difference value between the operation position and the predetermined operation position or information indicating that the difference value is different by a predetermined value or more. May be further provided.

  As a preferred configuration for obtaining the default operation position information, a test is performed with a default operation position information storage unit that stores the default operation position information for each vehicle in pairs with a vehicle identifier for identifying the vehicle. A vehicle identifier reception unit that receives a vehicle identifier of a vehicle, and a default operation position information acquisition that acquires, from the default operation position information storage unit, default operation position information corresponding to the vehicle based on the vehicle identifier received by the vehicle identifier reception unit. And a part further comprising a part. Here, the vehicle identifier receiving unit may receive a vehicle identifier from a vehicle determination sensor that automatically determines the test vehicle by reading, for example, the shape of the vehicle, a mark attached to the vehicle, a barcode, or the like. The vehicle identifier inputted by may be received.

  In order to easily realize a drive mechanism that can freely set the operation position of the positioning member, the drive mechanism includes an electric cylinder that linearly drives the positioning member between the operation position and the non-operation position. Is desirable. In that case, the contact sensor detects contact from a change in the current supplied to the motor constituting the electric cylinder, and the position sensor rotates from the reference position of the motor constituting the electric cylinder. It is preferable that the encoder detects this. This is because it can be configured without difficulty.

  In order to be able to adjust the drum and warm up while the vehicle is installed, the positioning members are moved up to the lifting position, which is above the operating position and can be lifted away from the drum. It is desirable to configure so that it can be driven.

  On the other hand, the vehicle performance test apparatus according to the present invention is for performing a vehicle performance test by rotating a wheel placed on a uniaxial drum, and may include the following components.

  That is, a pair of positioning members arranged so as to be able to move in the direction including the front-rear direction component before and after the vertical line passing through the axis of the drum, and configured to press the wheel,

  The positioning member includes a control mechanism that moves the axis of the wheel between an operating position where the wheel axis can be positioned on the vertical line and a non-operating position that does not contact the wheel, and the control mechanism serves as a test target. It is set to a predetermined operation position that is predetermined by the vehicle.

  If it is such, since each positioning member can be controlled to the operation position preset according to the vehicle by the control mechanism, the centering of the wheels of the test vehicle can be automatically performed without using an operator. It becomes possible.

  Further, the vehicle performance test apparatus according to the present invention is for performing a vehicle performance test by placing and rotating front and rear wheels on a pair of single-shaft drums installed so that the distance between them can be adjusted. Because

  A pair of positioning members respectively arranged before and after a vertical line passing through the axis of each drum;

  A drive mechanism for driving the pair of positioning members in directions including at least a front-rear direction component so as to press the wheel; and

  An operating position that controls the drive mechanism and that positions the pair of positioning members symmetrically about the vertical line and can position the wheel axis on the vertical line, and a non-operating position that does not contact the wheel A control mechanism that moves between

  A pressing force detection sensor for detecting the contact pressing force between each positioning member and the wheel,

  When the control mechanism has positioned all the positioning members at the operating position, the difference value of the pressing force obtained from the pair of pressing force detection sensors corresponding to each wheel or the difference value is different by a predetermined amount or more. A pressing force difference information output unit that outputs pressing force difference information, which is information indicating the above, may be provided.

  If this is the case, for example in a test vehicle such as a 4WD, positioning of the front and rear wheels can be automated, and if the distance between the wheel base of the test vehicle and the front and rear drums is different, output from the pressing force detection sensor. Since the output is different, the pressing force difference information output unit can automatically detect and output it.

  Furthermore, a vehicle performance test apparatus according to the present invention is for performing a vehicle performance test by placing and rotating front and rear wheels on a pair of single-shaft drums installed so that the distance between them can be adjusted. Because

  A pair of positioning members arranged so as to be movable in a direction including a front-rear direction component before and after a vertical line passing through the axis of each drum, and configured to be able to press a wheel;

  The pair of positioning members are positioned between a lift position that is a position that is symmetrical with respect to the vertical line and that can lift the wheel away from the drum, and a non-operating position that does not contact the wheel. A control mechanism to drive;

  A pair of pressing force detection sensors for detecting contact pressing force between the pair of positioning members and the wheels may be provided.

  Even in such a case, by comparing the contact pressing forces obtained from the pair of pressing force detection sensors when the vehicle is lifted, it is determined whether the distance between the drums and the wheel base of the vehicle match. Can be determined.

  More specifically, in a state where all the positioning members are positioned at the lifted position and the vehicle is separated upward from each drum, the difference value or the difference value of the pressing force respectively obtained from the pair of pressing force detection sensors is It is desirable to further include a pressing force difference information output unit that outputs pressing force difference information, which is information indicating that the difference is greater than a predetermined value.

  Furthermore, it is more preferable to provide an inter-drum distance adjusting mechanism that moves at least one drum and adjusts the distance between the drums based on the pressing force difference information. If this is the case, the distance between the drums can be automatically matched to the wheel base length of the test vehicle, and full automation can be further promoted.

  According to the present invention configured as described above, it is possible to automatically install a wheel immediately above a single-axis drum, and it can be completely unmanned or fully automated including transportation and installation on a drum of a vehicle. A possible vehicle performance test apparatus can be provided.

  <First Embodiment>

  A first embodiment of the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, the vehicle performance test apparatus according to the present embodiment is a chassis dynamometer for measuring the performance related to the fuel consumption, exhaust gas components and the like of the vehicle 1 under substantially the same conditions as actually running on the road. And a dynamo main body (not shown) installed in the pit and a centering device 3 attached to the dynamo main body.

  Each part will be described. The dynamo body has a uniaxial drum 2 that rotates with the wheel W of the vehicle 1 mounted on the top, and a load (not shown) that rotatably supports the drum 2 and controls the load on the drum 2 to be changeable. The apparatus and the frame (not shown) which has the floor board F in the top part are provided. The floor plate F is provided with a rectangular opening 12 only at a portion corresponding to the drum 2, and a certain region including the top of the drum 2 faces downward from the opening 12. The top of the drum 2 is set to be substantially the same height as the floor board F.

  The centering device 3 includes a roller 4 that is a pair of positioning members disposed symmetrically in the front-rear direction with a vertical line passing through the axis of the drum 2 as the center, and each roller 4 is formed at the front-rear end 13 of the opening 12. It is detected that the drive mechanism 5 that projects obliquely through the gap between the floor board F and the drum 2, the control mechanism 6 that controls the drive mechanism 5, and the roller 4 and the wheel W are pressed and contacted with a predetermined force. A contact sensor (not shown) that outputs a contact signal indicating the effect and a position sensor (not shown) that detects the position of the roller 4 and outputs it as position information are provided.

  The roller 4 has a cylindrical shape, the length thereof is slightly smaller than the depth width of the opening 12, and the roller 4 is arranged so that its axis is parallel to the axis of the drum 2.

  The drive mechanism 5 includes a base 51 attached to the frame, an electric cylinder 52 attached to the base 51, a pair of slide members 53 disposed on both sides of the electric cylinder 52, and a rod of the electric cylinder 52. 521 and a roller support 54 held at the tip of the slide member 53. The base body 51 has a channel shape formed by bending a plate material, and the electric cylinder 52 is attached to the center of the base body 51 in the width direction. When viewed from the side, the electric cylinder 52 is positioned obliquely above the drum 2 and fixed in such a posture that the rod 521 can extend obliquely upward toward the vertical line. The pair of slide members 53 are supported by the base 51 so as to be slidable in parallel with the extending and contracting direction of the electric cylinder 52. The roller support 54 is, for example, a U-shaped member composed of a belt-shaped intermediate plate 541 and bearing plates 542 formed integrally at both ends thereof, and both ends of the roller 4 can be rotated on the respective bearing plates 542. I support it. The tip of the rod 521 of the electric cylinder 52 is attached to the center of the intermediate plate 541, and the tip of the slide member 53 is attached to each end of the intermediate plate 541. In such a configuration, when the electric cylinder 52 expands and contracts, the roller 4 projects obliquely up and down (obliquely front and back) with the floor plate F as a boundary as described above.

  As shown in FIG. 2, the control mechanism 6 controls the movement of the electric cylinder 52. For example, the CPU 101, the memory 102, the input / output interface 105, the input means 107, the display 106, the AD converter 103, the DA converter 104, An amplifier (not shown) is provided. Of course, it is possible to use a discrete circuit or a switch such as a sequencer without using the CPU. Moreover, it is not necessary to be integrated, and for example, a general-purpose computer and a dedicated circuit may be combined.

  Although not shown, the contact sensor outputs a contact signal when, for example, the wheel W and the roller 4 come in contact with a predetermined pressure or more due to a change in the current supplied to the motor constituting each electric cylinder 52. More specifically, it is configured using a comparator or the like that is incorporated in a circuit that supplies current to the motor and that outputs a contact signal when the current value of the supplied current exceeds a predetermined value. Of course, other than that, a strain gauge affixed to the rod 521 of the electric cylinder 52 or a pressing force detection sensor such as a piezoelectric sensor is used, and the pressing force itself is sensed to determine whether the pressing force exceeds a predetermined value by software. For example, as shown in FIG. 3, when a buffer mechanism 543 (a spring which is an elastic body in this figure) is interposed between the drive mechanism 5 and the roller 4, the roller 4 and the drive are driven. A proximity sensor that outputs a contact signal when the mechanism 5 approaches a certain distance may be used.

  Although not shown, the position sensor is an encoder that detects a rotation amount from a reference position of a motor constituting each electric cylinder 52, for example. In addition, it is possible to directly detect the protruding amount of the rod 521.

  In this embodiment, as shown in FIGS. 2 and 4, a predetermined program is installed in the control mechanism 6, and the CPU and peripheral devices work together based on the program so that the control mechanism can detect the contact information. It functions as a reception unit 61, a position information reception unit 62, an operation position setting unit 63, a position difference information output unit 64, a vehicle identifier reception unit 65, a default operation position information storage unit 66, a default operation position information acquisition unit 67, and the like. ing.

  Below, each part of this control mechanism 6 is demonstrated in detail.

  The contact information receiving unit 61 receives contact signals from the pair of contact sensors respectively provided corresponding to the pair of rollers 4 disposed before and after the wheel W.

  The position information receiving unit 62 receives position information from the pair of position sensors provided corresponding to the pair of rollers 4.

  The operation position setting unit 63 stores the position information of the roller 4 obtained from each position sensor in the operation position information storage unit (not shown) as the operation position information when the contact signals are output from both of the contact sensors. It is.

  The vehicle identifier receiving unit 65 is information for specifying the vehicle 1 to be tested and is a vehicle identifier determined by a barcode, IC tag or other means, a vehicle identification sensor such as a barcode reader, or a keyboard by an operator input. It is received via the input means.

  The default operation position information storage unit 66 is, for example, a database that stores predetermined operation position information that is predetermined for each vehicle 1 or each vehicle type in combination with a vehicle identifier.

  The default operation position information acquisition unit 67 acquires the default operation position information corresponding to the vehicle 1 from the default operation position information storage unit 66 based on the vehicle identifier.

  The position difference information output unit 64 inquires of the default operation position information acquisition unit 67 about the default operation position information based on the vehicle identifier, and performs a calculation based on the obtained default operation position information and the operation position information. The difference value between the operating position and the default operating position is output. Specifically, for example, the difference value information is transmitted to another apparatus using the input / output interface 105, the standard color is used when the difference value is included in a predetermined range, and the warning color is displayed when the difference value is not included. The difference value information is displayed on the display 106 using.

  The control mechanism 6 is provided with an output unit (not shown). The output unit outputs a drive signal for controlling the operation of the drive mechanism 5 based on each information and signal, or an operator's instruction, etc., and selects the expansion / contraction direction of the rod 521, sets the operation speed, and starts / starts the operation. It will determine the stoppage.

  Next, an example of operation | movement at the time of performing a vehicle performance test using the vehicle performance test apparatus which concerns on this embodiment is shown.

  First, the operator identifies the vehicle 1 to be tested, and inputs the vehicle identifier from a keyboard (not shown). And the vehicle identifier reception part 65 receives a vehicle identifier.

  Next, as shown in FIG. 5, the wheel W of the vehicle 1 is positioned so as to contact the circumferential surface of the drum 2 and the floor surface, and the previous stage of the centering operation is completed. Then, based on an instruction from the operator, the output unit synchronizes and operates the pair of drive mechanisms 5 and starts to slide each roller 4 in the inoperative position under the floor toward the top of the drum 2. Start centering operation.

  The encoder outputs position information as the motor shaft of the electric cylinder rotates. If the roller 4 on the side close to the wheel W is in contact with the peripheral surface of the wheel W, the load on the motor increases, so that the supply current to the motor increases. The contact sensor senses contact by knowing that this current has exceeded a predetermined value, and outputs a contact signal.

  The wheel W moves toward the top of the drum 2 as the roller 4 in contact with the wheel W slides. As shown in FIG. 6, when the wheel W reaches the top of the drum 2, the other roller 4 also contacts the other peripheral surface of the wheel W and supports the wheel W.

  At this time, the contact sensor on the other side also senses contact and outputs a contact signal. The output unit stops the sliding operation when a contact signal is output from both of the contact sensors. This completes the centering operation.

  Moreover, although the case where the contact sensor was provided in both of a pair of positioning members was shown in the said embodiment, it is not restricted to this, You may provide a contact sensor only in either one of a pair of positioning members.

  In this case, for example, as shown in FIG. 5, the wheel W of the vehicle 1 that is in contact with the circumferential surface of the drum 2 and the floor surface is positioned, and the contact that can detect the load only on the positioning member closer to the wheel W. When a sensor (which may be a pressing force detection sensor described later) is provided, the roller 4 provided with the contact sensor and the roller 4 not provided with the other contact sensor in the non-operating position below the floor as described above. When the drum 2 is slid toward the top, the load applied to the roller 4 provided with the contact sensor (that is, the roller 4 pressing the wheel W) gradually decreases until the operating position is reached. Minimum when the operating position is reached. If the electric cylinder 52 is operated even after the operating position, the load applied to the roller 4 provided with the contact sensor again increases. The minimum load applied to the roller 4 provided with the contact sensor is detected by the contact sensor to determine the operation position, and the centering operation is completed by stopping the sliding operation at the operation position.

  Further, as shown in FIG. 5, a contact sensor is provided only on a positioning member that is in a state where the wheel W of the vehicle 1 is positioned so as to contact the circumferential surface of the drum 2 and the floor board F and is further away from the wheel W. In this case, when both rollers 4 are slid toward the top of the drum 2, a contact signal is output when the wheel W and the roller 4 provided with the contact sensor come into contact with each other, and the sliding operation is stopped.

  This completes the centering operation.

  On the other hand, the operation position setting unit 63 shown in FIG. 4 stores a pair of position information obtained from the pair of position sensors at that time as operation position information in the operation position information storage unit.

  The default operation position information acquisition unit 67 extracts the corresponding default operation position information from the default operation position information storage unit 66 based on the input vehicle identifier. The position difference information output unit 64 calculates the default operation position information and the operation position information obtained as a result of making an inquiry to the default operation position information acquisition unit 67, and outputs the difference value. Specifically, for example, it is transmitted to the network via the input / output interface 105, or notified to the operator by displaying on the display 106.

  When the operator can confirm from the display 106 that there is no abnormality in the operating position, after fixing the vehicle body or the like to the floor or the like with a vehicle fixture, the pair of rollers 4 is slid to the non-operating position to move the roller from the wheel W. 4 is separated and the vehicle test is started.

  In such a case, the roller 4 automatically stops at the operating position by the contact signal of the contact sensor, so that the vehicle 1 having the wheel W of any diameter is automatically centered and the vehicle performance test is started. be able to. Further, since the position information can be obtained from the position sensor, for example, by comparing the default operation position information set in the past and the current operation position information in the same or the same type of vehicle 1 using the vehicle identifier, It is possible to automatically detect that there is a difference, i.e., a difference in cylinder stroke, and to automatically detect an abnormality in the wheel air pressure, a non-installation of the vehicle 1 to be tested, a mistake, or the like.

  Next, modifications of this embodiment will be described below.

  In this modified example, as shown in FIG. 7, the wheel 4 can be lifted up to a lifting position P that is separated immediately above the drum 2 by the roller 4.

  First, after the wheel W is placed above the drum 2, the operator instructs the output unit to lift to the lifting position P. The output unit starts sliding of the roller 4 based on an operator's instruction and the like, and the roller 4 comes into contact with the wheel W and then separates above the drum 2.

  For example, when the state shown in FIG. 7 is reached, the control mechanism 6 determines that the roller 4 has reached the lift position P based on the operation position information and the lift position information indicating the predetermined lift position P. To stop the slide.

  With such a configuration, with the wheel W positioned on the drum 2, the wheel W can be easily separated from the drum 2 only by sliding the roller 4, and the warm-up operation can be performed.

  Second Embodiment

  Next, a second embodiment will be described with reference to FIG. In addition, in this figure, the same code | symbol is attached | subjected to the member corresponding to the said embodiment.

  The dynamo main body is the same as that of the said embodiment.

  The hardware configuration of the roller 4, the drive mechanism 5, the position sensor, and the control mechanism 6 of the centering device 3 is the same as that in the above embodiment, but the contact sensor may not be provided.

  The functional block of the control mechanism 6 is configured as shown in FIG. 8, and its vehicle identifier receiving unit 65, position information receiving unit 62, default operating position information acquiring unit 67, default operating position information storage unit 66, and output not shown. The part is the same as in the above embodiment.

  The operating position setting unit 63 shown in FIG. 8 stores the default operating position information of the vehicle 1 to be tested acquired by the default operating position information acquiring unit 67 as operating position information in an operating position storage unit (not shown). .

  The comparison unit 68 shown in the figure calculates the difference between the position information and the operation position information, and when the value is zero or within a predetermined value, the slide stop that requests the output unit to stop the slide of each roller 4 A signal is output.

  Below, an example of operation | movement at the time of performing a vehicle performance test using this embodiment is shown.

  First, the operator identifies the vehicle 1 to be tested, inputs the vehicle identifier from a keyboard (not shown), and the vehicle identifier reception unit 65 receives the vehicle identifier.

  The operating position setting unit 63 makes an inquiry to the default operating position information acquisition unit 67 based on the vehicle identifier, acquires the default operating position information obtained as a result of the inquiry, and stores it as operating position information in an operating position information storage unit (not shown). Let Then, as shown in FIG. 5, the preceding stage of the centering operation is completed by positioning the wheels W of the vehicle 1 so as to contact the circumferential surface of the drum 2 and the floor surface.

  Next, based on an operator's instruction, an output unit (not shown) operates the drive mechanisms 5 in a synchronized manner and slides the rollers 4 in the non-operating position below the floor toward the top of the drum 2. The centering operation is started by starting.

  The encoder detects the rotation of the motor shaft of the electric cylinder and outputs position information. The position information receiving unit 62 receives this position information, and the comparison unit 68 calculates the difference between the operating position information and the actually measured position information for each position information.

  As the roller 4 slides, the wheel W moves toward the top of the drum 2, and when the wheel W reaches the top of the drum 2, as shown in FIG. The wheel W is supported in contact with the wheel.

  At this time, if the difference between the operation position information and the actual position information is zero or within a predetermined value, the comparison unit 68 outputs a slide stop signal. The output section stops the sliding of each roller 4 based on the slide stop signal, thereby completing the centering operation.

  Then, after fixing the vehicle body 1 etc. on the floor or the like with a vehicle fixture (not shown), the pair of rollers 4 is slid to the wheel W release position, the roller 4 is separated from the wheels W, and the vehicle test is started.

  If it is such, since each positioning member can be controlled to the operation position preset according to the vehicle 1 by the control mechanism 6, centering of the wheel W of a test vehicle is automatically performed without using an operator. It becomes possible to do.

  As in the first embodiment, by adopting a configuration that does not output a slide stop signal to a predetermined lifting position P, as shown in FIG. 7, it is convenient when performing warm-up operation after centering.

  <Third Embodiment>

  Although the vehicle performance test apparatus according to this embodiment is not shown in the drawing, the vehicle performance test is performed by placing and rotating the front and rear wheels on a pair of uniaxial drums 2 that are installed so that the distance between them can be adjusted. It is intended to be used for testing 4WD vehicles. In addition, the same code | symbol is attached | subjected to the member corresponding to each said embodiment. This has substantially the same configuration as that of the first embodiment, and is provided with a roller 4 and a drive mechanism 5 corresponding to each drum 2. Note that the contact sensor as in the first embodiment is used as a pressing force detection sensor (of course, a dedicated sensor may be used) so that the pressing contact force between the wheel W and the roller 4 can be detected.

  Furthermore, in this embodiment, as shown in FIG. 9, the control mechanism is configured to include a pressing force information receiving unit 71, a pressing force difference information output unit 72, and a comparison unit 68.

  The pressing force information receiving unit 71 receives pressing force information from each pressing force detection sensor.

  The pressing force difference information output unit 72 has a predetermined value or a difference value of the pressing force obtained from the pair of pressing force detection sensors corresponding to the wheels W in a state where all the rollers 4 are positioned at the operation positions. Pressure difference information, which is information indicating that they are different, is output.

  The comparison unit 68 calculates a difference based on the position information and the operation position information, and calculates a pair of differences, and when the value is zero or within a predetermined value, the output unit (not shown) The slide stop signal for requesting the slide stop of the roller 4 is set to be output.

  The operation is as follows. First, one of the wheels W is centered. This is the same as in the first embodiment. At this time, as in the first embodiment, an abnormality in wheel air pressure or the like can be detected. At this time, the front-rear direction of the test vehicle 1 is set to be perpendicular to the extending direction of the roller 4.

  Next, with respect to the other wheels W, the corresponding rollers 4 are set to the operating positions.

  Then, the pressing force between the pair of rollers 4 and the wheels W is automatically sensed. At this time, if the respective pressing forces are different from each other by a predetermined value, the pressing force difference information output unit 72 displays a warning message indicating a wheelbase abnormality.

  On the other hand, for example, the distance between the drums may be adjusted until the abnormal message disappears, or the vehicle may be replaced if the vehicle is wrong.

  If this is the case, for example in a test vehicle such as a 4WD, positioning of the front and rear wheels can be automated, and if the distance between the wheel base of the test vehicle and the front and rear drums is different, output from the pressing force detection sensor. Since the output is different, the pressing force difference information output unit can automatically detect and output it.

  <Fourth embodiment>

  Next, a third embodiment will be described with reference to FIGS. In addition, in this figure, the same code | symbol is attached | subjected to the member corresponding to the said embodiment.

  The vehicle test apparatus according to the present embodiment includes a total of two dynamo bodies and a centering device 3 for the front wheel WF and the rear wheel WR.

  The dynamo main body is the same as that of the said embodiment.

  The hardware configuration of the roller 4, the drive mechanism 5, the position sensor, and the control mechanism 6 of the centering device 3 is the same as that of the above embodiment, but the contact sensor may not be provided. The centering device 3 includes a pressing force detection sensor (not shown) that detects the force with which the roller 4 presses the wheel W.

  The pressing force detection sensor detects the contact pressing force between the roller 4 and the wheel W and outputs it as pressing force information. Here, the current for measuring the current supplied to the motor constituting the electric cylinder 52 is measured. It is a total.

  The functional block of the control mechanism 6 is configured as shown in FIG. 10, and its vehicle identifier receiving unit 65, position information receiving unit 62, and output unit (not shown) are the same as those in the above embodiment.

  The lifting position setting unit 63M shown in FIG. 10 makes an inquiry about the default lifting position information to the default lifting position information acquisition unit 67M based on the vehicle identifier, and lifts a pair of default lifting position information to a lifting position information storage unit (not shown). It is stored as position information.

  The comparison unit 68 shown in the figure calculates a difference based on the position information and the lifted position information, and calculates a pair of differences, and when each value becomes zero or within a predetermined value, each roller 4 Is set to output a slide stop signal for requesting the slide stop.

  The default lifting position information storage unit 66M shown in the figure stores a predetermined lifting position information that is pre-existing lifting position information or information that makes it possible to calculate the lifting position and a vehicle identifier associated with the information. For example, a database.

  The default lifting position information acquisition unit 67M extracts or searches target default lifting position information based on the vehicle identifier, performs a necessary calculation, and returns the result.

  The pressing force information receiving unit 71 shown in the figure receives pressing force information output from a pair of pressing force detection sensors provided corresponding to the pair of rollers 4 disposed before and after the wheel W, respectively.

  The pressing force difference information output unit 72 shown in the figure calculates and outputs pressing force difference information, which is information indicating that the pressing force difference value or the difference value is different by a predetermined value or more from the pressing force information. It is.

  Below, an example of operation | movement at the time of performing the vehicle performance test in this embodiment is shown.

  First, as shown in FIG. 11, the vehicle 1 to be tested is arranged in advance so that the wheels W are in contact with the peripheral surface and the floor surface of the drum 2.

  Then, the operator identifies the vehicle 1 and inputs a vehicle identifier input from a keyboard (not shown), and the vehicle identifier receiving unit 65 receives the vehicle identifier.

  Next, the lifting position setting unit 63M makes an inquiry to the default lifting position information acquisition unit 67M based on the vehicle identifier, acquires the default lifting position information obtained as a result of the inquiry, and lift position information (not shown) as the lifting position information. Store in the storage unit and complete the previous stage of the lifting operation.

  In this state, based on an instruction from the operator, an output unit (not shown) operates the drive mechanisms 5 simultaneously to synchronize the rollers 4 contacting the front wheel WF or the rear wheel WR at an equal speed above the drum 2. The lifting operation starts by starting to slide symmetrically.

  At this time, if the wheel base length and the distance between the drums coincide with each other, the vehicle is in a state where the wheels are on the respective drums shown in FIG.

  When the slide starts, the encoder outputs position information as the motor shaft of the electric cylinder rotates. Further, the position information receiving unit 62 receives a pair of position information, and the comparison unit 68 calculates a difference between the operating position information and the position information for each position information.

  As the roller 4 slides, the front wheel WF and the rear wheel WR move away from the drum 2 and move upward. As shown in FIG. 13, when the wheel W reaches the lift position P of the drum 2, the difference between the lift position information calculated by the comparison unit 68 and the position information becomes zero or within a predetermined value, and the comparison unit 68 generates a slide stop signal. Is output. The output unit completes the lifting operation by stopping the slide based on the slide stop signal.

  At this time, the respective weights applied to the front wheel WF and the rear wheel WR are evenly distributed to the pair of rollers 4. Therefore, the pair of pressing force detection sensors for the front wheel WF output a pressing force signal indicating equal contact pressing force, and each pressing force information receiving unit 71 receives the pressing force information, and the pressing force difference information output unit 72. As for the pressing force difference information output from the above, a value within a predetermined value is calculated. Specifically, for example, the data is transmitted to the network via the input / output interface 105, or displayed on the display 106 to notify the operator.

  The same operation is performed for the rear wheel WR.

  However, if the distance between the drums 2 and the wheel base length of the vehicle 1 to be tested do not match, a state in which, for example, a part of the wheel W is not positioned directly above the drum as shown in FIG. Since at least one pair of rollers 4 supporting the front wheel WF or the rear wheel WR has different weights distributed to the rollers 4, at least one of the pressure detection sensors for the front wheel WF or the rear wheel WR is: Since the pressing force signals indicating different contact pressing forces are output, at least one pressing force difference information output unit 72 outputs pressing force difference information indicating a value equal to or greater than a predetermined value. Specifically, for example, the data is transmitted to the network via the input / output interface 105, or displayed on the display 106 to notify the operator.

  With such a configuration, when the vehicle 1 to be tested is separated from the drum 2, it is determined from the pressing force difference information whether the distance between the drums 2 and the wheel base of the vehicle 1 coincide with each other. it can.

  The present invention is not limited to the above embodiment.

  The drive mechanism is not limited to the one that linearly moves the positioning member, such as a cylinder, but may be one that rotates like an arm type. However, you may enable it to press a wheel directly from the front-back direction.

  Each sensor and positioning member are not limited to those of the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

The schematic diagram which shows the outline of the vehicle performance test apparatus in the 1st Embodiment of this invention. The hardware block diagram which shows the hardware configuration of the control mechanism in the embodiment. The elements on larger scale which show the buffer mechanism between a drive mechanism and a roller in embodiment different from the embodiment. The functional block diagram which shows the functional block of the control mechanism in the 1st Embodiment of this invention. The elements on larger scale which show the state of the wheel after completion of the front stage of the centering operation | movement of the embodiment, and a vehicle test apparatus. The elements on larger scale which show the state of the wheel after the centering operation completion of the embodiment and a vehicle test apparatus. The elements on larger scale which show the state which the vehicle test apparatus of the embodiment lifted the wheel to the lifting position. The functional block diagram which shows the functional block of the control mechanism in the 2nd Embodiment of this invention. The functional block diagram which shows the functional block of the control mechanism in the 3rd Embodiment of this invention. The functional block diagram which shows the functional block of the control mechanism in the 4th Embodiment of this invention. The figure which shows an example of the arrangement | positioning state before centering of the vehicle and vehicle performance test apparatus in the embodiment. The figure which shows an example of the arrangement | positioning state after centering of the vehicle and vehicle performance test apparatus in the embodiment. The figure which shows an example of the arrangement | positioning state of the vehicle lifted to the lift position in the same embodiment, and a vehicle performance test apparatus. The figure which shows an example of the arrangement | positioning state of the vehicle lifted to the lift position in the same embodiment, and a vehicle performance test apparatus.

Explanation of symbols

2 ... Drum 4 ... Roller 5 ... Drive mechanism 52 ... Electric cylinder 6 ... Control mechanism 63 ... Operating position setting unit 64 ... Position difference information output unit 65 ... Vehicle Identifier receiving unit 66 ... default operation information storage unit 67 ... default operation position information acquisition unit 71 ... pressing force information receiving unit 72 ... pressing force difference information output unit W ... wheel P ... Lifting position

Claims (7)

For rotating a wheel mounted on a single-axis drum to perform a vehicle performance test,
A pair of positioning members arranged before and after a vertical line passing through the axis of the drum;
A drive mechanism for moving the positioning members at least in the front-rear direction to drive the wheels;
A contact sensor that outputs a contact signal indicating that when the positioning member and the wheel are in press contact with a predetermined force;
A position sensor for detecting the position of the positioning member;
A control mechanism that controls the drive mechanism and moves each positioning member between an operating position where the axis of the wheel can be positioned on the vertical line and a non-operating position that does not contact the wheel;
Wherein the control mechanism state, and are not to set the position obtained from the position sensor at a time when the contact signal is output as said operating position,
A default operation position information storage unit storing default operation position information indicating a predetermined operation position set in the past for each vehicle to be tested, paired with a vehicle identifier for identifying the vehicle;
A vehicle identifier receiving unit for receiving a vehicle identifier of a vehicle to be tested;
A default operation position information acquisition unit that acquires, from the default operation position information storage unit, default operation position information corresponding to the vehicle based on the vehicle identifier received by the vehicle identifier reception unit ; Vehicle performance test equipment.   The control mechanism compares predetermined operation position information with operation position information indicating an actually determined operation position, and a difference value between the operation position and the predetermined operation position or a difference value thereof is different by a predetermined value or more. The vehicle performance test apparatus according to claim 1, further comprising a position difference information output unit that outputs position difference information that is information indicating the fact. The drive mechanism includes an electric cylinder that linearly drives the positioning member between an operating position and a non-operating position;
The contact sensor detects contact from a change in current supplied to a motor constituting the electric cylinder;
The position sensor, a vehicle testing apparatus according to claim 1 or 2, wherein an encoder for detecting the rotation amount from the reference position of the motor constituting the electric cylinder. Said drive mechanism, each positioning member, wherein a above the working position it is capable of driving the wheels from the drum to the lifting position is a position that can lift is separated upward claim 1, 2 or 3, wherein Vehicle performance testing equipment. It is for carrying out a performance test of a vehicle by placing and rotating front and rear wheels on a pair of uniaxial drums installed so that the distance between them can be adjusted,
A pair of positioning members respectively arranged before and after a vertical line passing through the axis of each drum;
A drive mechanism for driving the pair of positioning members in directions including at least a front-rear direction component so as to press the wheel; and
An operating position that controls the drive mechanism and that positions the pair of positioning members symmetrically about the vertical line and can position the wheel axis on the vertical line, and a non-operating position that does not contact the wheel A control mechanism that moves between
A pressing force detection sensor for detecting the contact pressing force between each positioning member and the wheel,
When the control mechanism has positioned all the positioning members at the operating position, the difference value of the pressing force obtained from the pair of pressing force detection sensors corresponding to each wheel or the difference value is different by a predetermined amount or more. A vehicle performance test apparatus comprising a pressing force difference information output unit that outputs pressing force difference information, which is information indicating It is for carrying out a performance test of a vehicle by placing and rotating front and rear wheels on a pair of uniaxial drums installed so that the distance between them can be adjusted,
A pair of positioning members respectively arranged before and after a vertical line passing through the axis of each drum;
A drive mechanism for driving the pair of positioning members in directions including at least a front-rear direction component so as to press the wheel; and
The drive mechanism is controlled, and the pair of positioning members are lifted positions that are positions symmetrical with respect to the vertical line and can separate the wheel upward from the drum, and non-actuated without contacting the wheel A control mechanism that moves between positions;
A vehicle performance test apparatus comprising: a pair of pressing force detection sensors that respectively detect contact pressing force between the pair of positioning members and wheels. When the control mechanism positions all the positioning members at the lifted position and separates the vehicle upward from the drums, a difference value of the pressing force obtained from the pair of pressing force detection sensors or a difference value thereof is predetermined. The vehicle performance test apparatus according to claim 6, further comprising a pressing force difference information output unit that outputs pressing force difference information, which is information indicating the difference.