JP2008216189A - Vehicle-testing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide vehicle-testing device loaded with vehicle drive wheel on circumference belt to conduct braking force test of vehicles, and the like, which enables accurate braking force measurement, even if semifluctuating vibrations (pulsations) arise on the top surface of the above circumference belt during the braking force test of vehicles. <P>SOLUTION: This vehicle-testing device 1 comprises base substance 2, base material 3 movably-mounted on the above base substance 2 in cross direction with bearing support of FWD and AFT large-diameter rollers 3a/3b on upper section, circumference belt 3c stretched around the area between these FWD and AFT large-diameter rollers 3a/3b, and load cells 3g of detecting means arranged by connecting between the above base substance 2 and the base material 3 to detect force acting on this base material 3. In the testing device, the front wheel or the rear wheel of vehicle is placed on top surface of the belt 3c to circumferentially-drive this belt 3c, thus the reactive force produced between wheel of the vehicle and the above belt 3c, when braking force is applied to the wheel, will be detected by the load cells 3g. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle travel test apparatus for performing a land travel test of a vehicle such as an automobile.

  Conventionally, in vehicle inspection and the like, as a vehicle running test device for performing a vehicle speedometer test or braking force test, etc., it comprises a fixed roller device for supporting the front wheels and a movable roller device for supporting the rear wheels, A wheel base positioning device for a vehicular test machine is known in which the movable roller device is moved in accordance with the distance between the axles of the vehicle (see, for example, Patent Document 1).

  However, the roller device before and after this conventional vehicle running test device fixes one roller device and moves the other roller device in accordance with the distance between the axles of the vehicle. A drive mechanism, a control device for controlling the distance between the fixed roller device and the movable roller device, and the like are required, and there is a problem that the device is complicated and expensive.

  Therefore, instead of the movable roller device, a wheel comprising front and rear large-diameter rollers, a small-diameter roller rotatably arranged in parallel between the large-diameter rollers, and a revolving belt wound between the front and rear large-diameter rollers. There is an example in which a support device is provided so that the front wheel and the rear wheel of the test vehicle are supported by the wheel support device having the rotating belt and the fixed roller device even if the distance between the axles of the vehicle is different (for example, (See Patent Document 2).

JP 2001-264218 A JP 2004-309291 A

  In the wheel support device and the wheel support system of the invention of Patent Document 2, a driving motor, a one-way clutch, a torque detector, a speed sensor, and the like are connected to one of the two large-diameter rollers. The wheels of the inspection vehicle are placed on the belt, and the braking force of the wheels is measured by the reaction force generated in the roller driving motor and the torsion torque generated in the roller shaft.

  However, at the time of this measurement, wave-like vibration (pulsation) is generated on the upper surface of the belt, which causes a problem that the torsional torque value also pulsates and correct measurement cannot be performed.

  This seems to be caused by bending of the circulating belt, unevenness of processed parts, and the like, and it was difficult to completely prevent pulsation of the circulating belt.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle test apparatus that solves the above-described problems and that can accurately measure the braking force of a wheel even if some pulsation occurs in a circulating belt.

  In order to achieve the above-described object, the present invention provides a base body, a support body that is provided on the base body so as to be movable in the front-rear direction, and a roller that supports the front and rear rollers. Or a belt on which a rear wheel is placed, and a detecting means provided by connecting between the base body and the support body to detect a force acting on the support body, and one of the front and rear rollers. Rotation drive means is connected, and the detection means places the front wheel or rear wheel of the vehicle on the upper surface of the belt, drives the belt to rotate around, and applies braking force to the wheel of the vehicle. Detects reaction force with the belt.

  As an effect of the present invention, in a vehicle running test apparatus including a front and rear wheel support device for mounting a pair of front and rear wheels of a vehicle, the vehicle test of the present invention is applied to either the front or rear wheel support device. By arranging the pair of devices, it is possible to perform a test without moving the vehicle support device even on vehicles having different distances between the axles, and in the braking force test of the wheels, the braking force of the vehicle testing device can be measured. Since the detection is performed not by the driving unit of the circulating belt but by the movement of the entire support body, it is possible to provide a vehicle testing apparatus capable of accurately measuring the braking force even if a rotational load fluctuation occurs in the circulating belt.

  Examples of the best mode for carrying out the present invention are shown below.

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

  FIG. 1 is a plan view of a vehicle running test apparatus installed on a floor surface F of a vehicle maintenance factory or the like. The vehicle running test apparatus is a pair of front wheels (or rear wheels) of a vehicle under test (hereinafter referred to as a vehicle). ) And a second wheel support B for supporting a pair of rear wheels (or front wheels) of the vehicle.

  The first wheel support part A is formed by arranging a pair of first wheel support devices 11 provided with an intermediate lift 11c between the front and rear rollers 11b and 11b for raising and lowering the wheels of the vehicle.

  Reference numeral 11a denotes a conventional control / display device for measuring the braking force and speed of the vehicle in the first wheel support device 11.

  The second wheel support portion B is formed by arranging a pair of vehicle test apparatuses of the present invention on the left and right. 1a is a motor with a speed reducer for driving a rotating belt 3c (described later) of the vehicle test apparatus 1, and 1b is a control / display device for measuring braking force, speed, etc. of a vehicle wheel. .

  A side view of the vehicle test apparatus 1 is shown in FIG. 2, and a plan view thereof is shown in FIG. 3 (partially cut off).

  The vehicle test apparatus 1 is installed in a pit P provided on the floor surface F.

  That is, the vehicle test apparatus 1 has a base body 2 installed in the pit P and a support body 3 placed on the base body 2 so as to be movable in the front-rear direction.

  The support 3 pivotally supports large-diameter rollers 3a and 3b on the front and rear of the upper portion, and a belt (circular belt) 3c is stretched between the front and rear rollers, and is further positioned above the circular belt 3c. The portion is supported by a plurality of auxiliary rollers 3d.

  Reference numeral 3e denotes a bearing portion of the large-diameter roller 3b, and the motor 1a with a speed reducer drives a rotating belt 3c via the large-diameter roller 3a.

  Reference numeral 3f denotes a wheel or roller for supporting the support 3, and the roller 3f is formed so as to roll on the upper surface of the base body 2 in the front-rear direction.

  3 g is a load cell of a means for detecting the force interposed between the base body 2 and the support body 3, and the load cell 3 g is formed between the protrusion 2 a protruding above the end of the base body 2 and the support body 3. It is installed to connect the end.

  Next, the operation and effect of the present embodiment will be described.

  A pair of front wheels (or rear wheels) of the test vehicle is placed on each central portion of the pair of first wheel support devices 11 provided on the first wheel support portion A, and the pair of rear wheels (or front wheels) of the vehicle is mounted. A pair of vehicle test apparatuses 1 provided on the second wheel support B are placed on the respective revolving belts 3c.

  The large-diameter roller 3a is driven by the motor 1a with a speed reducer so that the rotating belt 3c moves in the direction in which the rear wheel rotates or in the opposite direction.

  When a vehicle brake is stepped on, a wheel (front wheel) that is not measured on the vehicle is on the first wheel device 11, so that the braking force of the measured wheel becomes a ground reaction force and the wheel is applied to the support 3. Generates a force that turns in the direction of rotation or in the opposite direction.

  This force is detected by the load cell 3g of the detection means, and the detection signal is sent to the control / display device 1b. The control / display device 1b converts the signal and displays the braking force on the display unit.

  As described above, in the vehicle test apparatus 1 of the present invention, the belt 3c is allowed to move in the front-rear direction according to the ground reaction force. Therefore, only the reaction force generated on the support 3 is detected ignoring the pulsation that is likely to occur in the vehicle, so that it is possible to accurately measure the braking force and to measure the vehicle with different distances between the front and rear axles. It is possible to respond without moving the position.

  The wheels to be measured by the vehicle may be placed on the circulating belt 3c of the vehicle test apparatus 1 of the present invention, and the other wheels may be placed on the floor surface F. 2 and 3 show an example in which the load cell 3g of the detecting means is installed between the rear end portion of the base body 2 and the rear end portion of the support body 3, but this is the front end portion of the base body 2. The load cell 3g may be installed between the front end of the support 3 and the load cell 3g.

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

  FIG. 4 shows a plan view of the second wheel support B ′ of this embodiment in which a pair of vehicle test apparatuses 1 ′ and 1 ′ are arranged on the left and right, and the left and right front rollers 3a are respectively a reduction gear and a motor with a one-way clutch. The belt 3c is driven while being driven to rotate by 1a.

  The rear rollers 3b and 3b of the left and right vehicle test apparatus 1 'are connected to each other through an electromagnetic clutch 4a and a universal joint 4b so as to be able to contact and separate from each other.

  The left and right vehicle test apparatuses 1 'and 1' are mounted with the left and right wheels of the test vehicle, respectively, and a braking force test or the like is performed. When there is a difference in braking force between the left and right wheels of the test vehicle, The left and right vehicle test apparatuses 1 ′ and 1 ′ have a difference in the amount of movement of the support 3 before and after. For this reason, the universal joint 4b has a structure in which the length of the universal joint 4b is variable as well as the mounting angle, so as to cope with the difference in the amount of movement of the left and right rear rollers 3b.

  A rotation detector (tachometer) 4c is connected to one end of the rear roller 3b.

  Next, the operation and effect of the present embodiment will be described.

  When performing a speedometer test of a test vehicle, the test is performed with the electromagnetic clutch 4a in a connected state.

  At that time, since the left and right rear rollers 3b and 3b rotate at the same speed, the left and right rear wheels of the test vehicle also rotate at the same speed.

  Therefore, when the rear wheel is driven to rotate, the one-way clutch attached to the motor 1a is released, and the rear rollers 3b and 3b can rotate following the rotation of the rear wheel, and thus the rear wheel The rotation speed is detected by the rotation detector 4c, and the detection signal is sent to the control / display device 1b. The control / display device 1b converts the signal and displays the speed value on the display unit. Then, it is possible to determine whether the speedometer is good or bad by comparing the value of the speed and the value indicated by the speedometer of the test vehicle.

  When performing a braking force test on the test vehicle, the test is performed with the electromagnetic clutch 4a in the disconnected state. At this time, when the motors 1a are driven to rotate, the one-way clutch is engaged and the rear rollers 3b and 3b are driven to rotate, whereby the braking force of the left and right rear wheels of the test vehicle can be measured separately.

  In this embodiment, the electromagnetic clutch and the universal joint are interposed between the left and right rear rollers 3b and 3b, but this may be interposed between the left and right front rollers 3a and 3a instead of the rear roller, or As shown in FIG. 5, the left and right front rollers 3a are composed of one one-way clutch 5a interposed between the left and right front rollers 3a and 3a and universal joints 5b and 5c on both sides of the one-way clutch 5a. 3a may be rotated synchronously.

  In FIG. 5, 5d is a motor with a speed reducer for driving the left and right front rollers 3a and 3a, and 5e is a drive for rotationally connecting the motor 5d with the speed reducer and the one-way clutch 5a. Chain or belt.

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

  FIG. 6 shows a plan view of the second vehicle support portion B ″ of the present embodiment in which a pair of vehicle test apparatuses 1 ″, 1 ″ are arranged on the left and right.

  Reference numeral 6 denotes support fixing means, and the support fixing means 6 includes a conical head 6a and a root-type piston type actuator 6b.

  The support body 3 ′ is provided on the base body 2 so as to be movable in the front-rear direction. The support body fixing means 6 is a device for fixing the support body 3 ′ so as not to move on the base body 2. .

That is, the support fixing means 6 is fixed to the base body 2 by a root actuator 6b, and the head 6a is advanced and retracted so that the tip of the conical head 6a is provided on the side surface of the support 3 '. The movement of the support 3 'can be restrained by engaging with the joint hole 3h.

  FIG. 7 shows a side view of the vehicle test apparatus 1 ″. The support fixing means 6 may be provided so as to be fitted only to one side surface of the support 3 ′, or the support fixing means 6 is provided on both sides of the support 3 ′. The support 6 'may be fixed by projecting the head 6a from both sides of'.

  Next, the operation and effect of the present embodiment will be described.

  When performing the speedometer test of the test vehicle, the actuator 6b of the support fixing means 6 is operated to project the head 6a, and the conical tip of the head 6a is connected to the side surface of the support 3 '. Engage with the fitting hole 3h.

  By restricting the back and forth movement of the support 3 'in this way, the support 3' is kept stationary even when the wheels of the test vehicle are rotated at high speed on the belt 3c. The indicated value of the detector 4c can also show a stable value.

  By constraining the support 3 'in this way, the speedometer test of the test vehicle can be performed with high accuracy.

  In this embodiment, the conical head 6a of the support fixing means 6 is engaged with the fitting hole 3h in the side surface of the support 3 'to restrain the support 3', but instead of the side surface. Although not shown in the figure, fitting holes are provided in the front and back side portions of the support 3 ′, and support fixing means 6 are arranged on the front and back of the support 3 ′, and their heads are engaged with the fitting holes. Then, the support 3 'may be restrained.

  Further, the head 6a of the support fixing means 6 is formed into a flat plate or rounded convex shape instead of the conical shape, and the head 6a is brought into contact with the front and rear end surfaces of the support 3 'to support the support 3. You may make it restrain the movement before and behind '.

  In the above-described embodiment, the case of a four-wheeled vehicle in which the vehicle test apparatus 1 according to the present invention is arranged on both the left and right sides is shown.

  The present invention is used for a vehicle test apparatus for performing a land-based running test in a vehicle maintenance factory or the like that performs vehicle inspection.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a vehicle travel test apparatus that includes a vehicle test apparatus according to a first embodiment. It is a side view of a vehicle test apparatus same as the above. It is the top view which cut and showed a part of vehicle test device same as the above. It is a top view of the 2nd wheel support part which equipped with the vehicle test device of Example 2. It is a top view of the other example of the 2nd wheel support part which equipped with the vehicle test device of Example 2 same as the above. FIG. 6 is a plan view of a second wheel support portion that includes the vehicle test apparatus according to the third embodiment. It is a side view of the vehicle test apparatus of Example 3 same as the above.

Explanation of symbols

1, 1 ′, 1 ″ Vehicle test apparatus 1a Rotation drive means (motor with speed reducer)
2 Base body 3, 3 'Support body 3a, 3b Roller (large diameter roller)
3c belt (circular belt)
3d auxiliary roller 3g detecting means 4a electromagnetic clutch 4b, 5b, 5c universal joint 5a one-way clutch 6 support fixing means

Claims (4)

  A base body, a support body which is provided on the base body so as to be movable in the front-rear direction, and supports a roller in front and rear, a belt which is stretched between the front and rear rollers and carries a front wheel or a rear wheel of the vehicle, and the base body And a detecting means for detecting a force acting on the supporting body, and a rotation driving means is connected to one of the front and rear rollers, and the detecting means comprises: A vehicle that detects a reaction force between the belt and the belt that is generated when a front wheel or a rear wheel of the vehicle is placed on the upper surface of the belt and the belt is driven to rotate and a braking force is applied to the wheel of the vehicle. Test equipment.   The vehicle test apparatus according to claim 1, wherein an auxiliary roller for supporting a belt portion located above the belt stretched between the front and rear rollers is provided between the front and rear rollers.   A pair of vehicle test devices are arranged side by side and the left and right rollers of the front and rear rollers respectively supported by the left and right vehicle test devices are connected to each other so as to be able to contact and separate from each other. The vehicle test apparatus according to claim 1, wherein the rollers of the vehicle test apparatus are configured to be rotatable in synchronization with each other.   The vehicle test apparatus according to claim 1 or 3, wherein a support fixing means that can be engaged and disengaged to fix the support so that the support does not move on the base body is provided on the base body.

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