JP6504661B2 - Rough load tester - Google Patents

Description

  The present invention relates to a rough road tester used for a running test of a vehicle such as a car.

  The rough road tester applies vibration to a vehicle such as a car, reproduces the traveling condition of the vehicle on the actual road surface (actual road surface) on which the vehicle travels, and performs a traveling test on noise, noise, vibration, etc. of the vehicle. Device of The rough load tester has an excitation roller provided with irregularities on the outer periphery as a portion that applies vibration to the vehicle. The vibration roller has its rotational axis parallel to the rotational axis of the vehicle wheel and is disposed at a position corresponding to each wheel. The vehicle to be inspected is in a state in which each wheel is in contact with the roller, that is, a state in which the main body of the vehicle is supported on the roller via the wheel.

  According to the rough load tester, the wheel and the roller rotate in contact with each other by the rotational drive of the wheel by the self-traveling of the vehicle or by the rotational drive of the roller by the drive source such as a motor. A driving condition is obtained in which the surface is simulated on the road surface. Thus, the traveling state of the vehicle on the actual road surface is reproduced, and the traveling test of the vehicle is performed.

  Conventionally, as a configuration of the rough load tester, there is known a configuration in which excitation rollers are provided on the front and rear sides of each wheel of a vehicle (see, for example, Patent Literature 1 and Patent Literature 2). In such a configuration, the two rollers located at the front and rear of each wheel have the same diameter, and are disposed at the same height at a distance smaller than the diameter of the wheel in the front-rear direction of the vehicle. The wheels are mounted on and supported by these two rollers, so that the wheels and the two lower rollers thereof have respective isosceles triangle-shaped rotational axes in a side view (a view of the rotational axis of the rollers). It becomes an arrangement | positioning aspect located in a vertex. As described above, in a so-called two-shaft type configuration in which two excitation rollers are disposed forward and backward with respect to each wheel, the wheel is dropped between the front and rear rollers to prevent the vehicle from jumping out. Driving test will be conducted.

JP, 2009-293988, A Patent No. 4487855

  According to the configuration of the two-axis type in which the excitation rollers are disposed on the front and rear sides of each wheel as described above, there are the following problems. First, due to the configuration that the wheel is dropped between the front and rear vibration rollers, the collision position of the unevenness on the outer periphery of the roller against the wheel is significantly higher than the position where the wheel receives collision of the unevenness on the road Will be located in For this reason, the vibration state (swinging direction) of the vehicle obtained by the unevenness of the roller is different from the vibration state of the vehicle when traveling on the actual road surface, and a sufficient test result as a traveling test simulating the traveling state on the actual road surface It is difficult to get

  Further, the excitation action by the unevenness of the roller on the rear side of the wheel is an action that the wheel does not receive when the vehicle traveling on the actual road advances. That is, since a vehicle moving forward on an actual road surface receives bumps and dips from the front side of the wheel by riding on bumps and bumps on the road, basically, there is no collision due to bumps and bumps on the road on the rear side of the wheels. For this reason, the excitation action by the rear side roller in the two-axis configuration may be an obstacle to reproducing the vehicle vibration when traveling on an actual road surface.

  The present invention has been made in view of the above problems, and provides a rough load tester capable of easily obtaining a vibration state similar to a vehicle vibration when traveling on an actual road surface, for a vehicle to be inspected. With the goal.

  The rough load tester according to the present invention is a rough load tester for performing a traveling test of the vehicle by applying vibration to the vehicle to be inspected, and the unevenness is provided on the outer periphery, and the rotation axis direction is the rotation axis of the wheel of the vehicle. An excitation roller which is parallel to the direction and is located on the front lower side in the traveling direction of the vehicle with respect to the wheel and rotates in a state of being circumscribed with the wheel; An auxiliary roller having a surface, parallel to the rotational axis direction of the wheel, and positioned on the lower rear side of the traveling direction with respect to the wheel, and supporting the wheel together with the vibration roller; Is provided.

  Further, in the rough load tester according to one aspect of the present invention, the unevenness is formed by one or more protrusions provided on the outer peripheral surface of the vibration roller, and the vibration roller and the auxiliary roller are The angle around the rotation axis of the wheel based on the position vertically below the position of the rotation axis of the wheel at the position where the wheel receives the collision of the projection is within the range of 15 to 25 ° Are located in

  Further, in the rough load tester according to one aspect of the present invention, the auxiliary roller has a smaller diameter than the vibration roller.

  In the rough load tester according to one aspect of the present invention, the relative position between the vibration roller and the auxiliary roller is changed by moving at least one of the vibration roller and the auxiliary roller. It has a mechanism.

  In the rough load tester according to one aspect of the present invention, the vehicle has a pair of left and right front wheels and a rear wheel as the wheels, and at least one of the pair of left and right front wheels and the pair of left and rear wheels. The pair of corresponding exciting rollers are connected to each other by the connecting shaft so as to integrally rotate coaxially, and the connecting shaft is provided relative to the concavities and convexities of the pair of exciting rollers. A phase adjusting unit is provided to adjust the phase.

  In the rough load tester according to one aspect of the present invention, the wheel is provided on at least one of the front side and the rear side in the traveling direction with respect to the wheel, and the wheel is higher than the vibration roller and the auxiliary roller. And a safety roller which holds the supporting state of the wheel by the excitation roller and the auxiliary roller.

  The rough load tester according to one aspect of the present invention includes a moving mechanism that moves the safety roller to change the position of the safety roller with respect to the vibration roller and the auxiliary roller.

  According to the present invention, for the vehicle to be inspected, it is possible to easily obtain a vibration state similar to the vehicle vibration when traveling on an actual road surface.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the whole structure of the rough load tester which concerns on 1st embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows the whole structure of the rough load tester which concerns on 1st embodiment of this invention. It is a side view showing composition of a rough load tester concerning a first embodiment of the present invention. It is a top view showing composition of a rough load tester concerning a first embodiment of the present invention. It is an explanatory view about an operation of a rough load tester concerning an embodiment of the present invention. It is a side view which shows the whole structure of the rough load tester which concerns on 2nd embodiment of this invention. It is a top view which shows the whole structure of the rough load tester which concerns on 2nd embodiment of this invention. It is a side view showing the composition of the rough load tester concerning a second embodiment of the present invention. It is an explanatory view about composition of a rough load tester concerning a second embodiment of the present invention. It is a side view showing composition of a rough load tester concerning a third embodiment of the present invention.

  The present invention, in a rough load tester, focuses on components of vibration in the respective directions given to the wheels of the vehicle by the unevenness of the outer periphery of the vibration roller, and the unevenness of the vibration roller in a biaxial configuration employed conventionally. It is an object of the present invention to find a defect in reproducing a traveling state on an actual road surface which occurs due to a mode of a collision to a wheel, and to solve the defect. The rough load tester according to the present invention is configured to be provided with an auxiliary roller that supports the wheel together with the excitation roller while the excitation roller provided for each wheel is configured as a single-axis type, so that the test running state As a result, it is possible to easily realize a running condition extremely close to the running condition on an actual road surface. Hereinafter, embodiments of the present invention will be described.

First Embodiment
A first embodiment of the present invention will be described. As shown in FIG. 1 and FIG. 2, the rough load tester 1 according to the present embodiment is for performing a traveling test of the vehicle 2 by applying vibration to the vehicle 2 to be inspected (test object). That is, the rough load tester 1 reproduces the traveling state of the vehicle 2 on the actual road surface on which the vehicle 2 travels by applying vibration to the vehicle 2 as the inspection target, and noise, noise, vibration, etc. of the vehicle 2. It is a device for conducting a running test.

  In the present embodiment, the vehicle 2 is a passenger car and is a four-wheeled vehicle having a pair of left and right front wheels 3F and rear wheels 3R coaxially arranged with each other as the wheels 3. The wheel 3 is composed of a wheel 3a and a tire main body 3b mounted on the outer periphery of a rim of the wheel 3a.

  The rough load tester 1 includes, as a portion that applies vibration to the vehicle 2, an excitation roller 10 provided with irregularities on the outer periphery. The vibration roller 10 is disposed at a position corresponding to each wheel 3 with the rotation axis direction parallel to the rotation axis direction (left and right direction in FIG. 2) of the wheel 3 of the vehicle 2. That is, the excitation roller 10 is disposed for each of the left and right front wheels 3F and rear wheels 3R.

  In the running test by the rough load tester 1, the vehicle 2 as the inspection target is placed on and supported by the rough load tester 1. The vehicle 2 is supported in a state in which the wheels 3 are in contact with the vibration roller 10, that is, in a state in which the vehicle body 2 a is supported on the vibration roller 10 via the wheels 3. In the example shown in FIG. 1 and FIG. 2, the direction of the arrow A1 is the traveling direction (forward direction) of the vehicle 2.

  According to the rough load tester 1 of the present embodiment, by the rotational driving of the wheel 3 by the self-traveling of the vehicle 2, the wheel 3 and the excitation roller 10 rotate in contact with each other, and the excitation roller becomes an uneven surface. A traveling state in which the outer peripheral surface of 10 is simulated on the road surface is obtained. For this reason, the rough load tester 1 has the following configuration for the excitation roller 10.

  As shown in FIG. 2, a pair of left and right excitation rollers 10F for left and right front wheels 3F and a pair of left and right excitation rollers 10R for left and right rear wheels 3R are coaxially arranged with each other and integrally coaxial. It is mutually connected by the connecting shaft part 16 so that it may rotate. That is, the left and right excitation rollers 10F and 10F for the front wheels 3F and 3F, and the left and right excitation rollers 10R and 10R for the rear wheels 3R and 3R are mutually non-rotatably coupled to each other by the coupling shaft portion 16 It is done. The connecting shaft portion 16 is a portion that integrally connects the left and right excitation rollers 10 with each other, and is mainly configured of an axis extending in the left-right direction.

  The coupling shaft portion 16 is provided with a coupling connecting portion 20. The coupling connecting portion 20 integrally connects the shaft portions 16 a extended from the left and right excitation rollers 10 as a portion constituting the connecting shaft portion 16. For example, the coupling connecting portion 20 connects the shaft portions 16a relative non-rotatably in a state in which joint portions such as flanges provided at the end portions of the respective shaft portions 16a are joined and fixed using a fastening member or the like. Do.

  The coupling connecting portion 20 is configured such that the shaft portions 16a can be fixed at a plurality of connecting positions around the axis, and the position of the relative rotational direction of the left and right excitation rollers 10 can be adjusted. That is, the coupling connecting portion 20 can change the relative phase around the rotation axis stepwise or steplessly for the left and right excitation rollers 10 connected to each other by the connecting shaft portion 16. It is configured.

  The front excitation roller 10 F and the rear excitation roller 10 R are configured to rotate in conjunction with each other by a rotation transmission mechanism by the transmission belt 17. The transmission belt 17 is an endless belt, and for each of the front and rear excitation rollers 10, it is coaxial with the connecting shaft portion 16 on the left and right sides from the left and right (left in the drawing) excitation rollers 10. It is wound around front and rear pulleys 18 provided on the extended shaft portion extended.

  With the above configuration, the left and right excitation rollers 10 are integrally rotated by the connecting shaft portion 16, and the front and rear excitation rollers 10 are synchronously rotated by the pulley 18 and the transmission belt 17. Therefore, regardless of the drive system of the vehicle 2 such as front wheel drive, rear wheel drive, and four-wheel drive, the drive wheels of the wheels 3 of the vehicle 2 are rotationally driven to contact the drive wheels. The roller 10 is driven to rotate as the drive wheel rotates, and the four excitation rollers 10 interlock and rotate synchronously. Thus, the traveling state of the vehicle 2 is reproduced.

  The configuration for synchronously rotating the four excitation rollers 10 by self-traveling of the vehicle 2 is not limited to this embodiment. For example, instead of the transmission belt and the pulley, a chain, a sprocket, etc. are used. A well-known structure, such as a structure, is suitably adopted. In addition, a configuration may be adopted in which the excitation roller 10 is rotationally driven using a drive source such as a motor.

  The rough load tester 1 of the present embodiment includes an auxiliary roller 30 that supports the wheel 3 together with the vibration roller 10. The auxiliary roller 30 has its rotation axis direction parallel to the rotation axis direction of the wheels 3 of the vehicle 2, that is, the rotation axis direction of the excitation roller 10, and is disposed at a position corresponding to each wheel 3. That is, the auxiliary roller 30 is disposed for each of the left and right front wheels 3F and rear wheels 3R.

  As described above, in the rough load tester 1 according to the present embodiment, each of the wheels 3 of the vehicle 2 has one excitation roller 10 and one auxiliary roller 30 whose rotation axis directions are parallel to each other, that is, the rotation axis One axis is arranged. Further, the arrangement configuration of the excitation roller 10 and the auxiliary roller 30 with respect to each wheel 3 is common to the four wheels 3 that the vehicle 2 has.

  The rough load tester 1 has a floor plate portion 4 which forms a floor surface 4a which is a traveling surface of the vehicle 2 when the vehicle 2 supported on the excitation roller 10 and the auxiliary roller 30 is loaded (see FIG. 1). The floor plate portion 4 is provided with a rectangular opening 4b facing the upper side of the excitation roller 10 and the auxiliary roller 30 so that the upper end of each roller is positioned at substantially the same height position as the floor surface 4a. . That is, the excitation roller 10 and the auxiliary roller 30 face the substantially same plane as the floor 4 a through the opening 4 b of the floor plate 4, and receive the contact of the wheels 3 to support the vehicle 2. Therefore, the vibration roller 10, the auxiliary roller 30, the interlocking mechanism of these rollers, the support mechanism, and the like are disposed in the underfloor space below the floor plate portion 4.

  In the following description, a configuration including the excitation roller 10 and the auxiliary roller 30 provided for each wheel 3 of the vehicle 2 is referred to as an excitation support roller mechanism 5. Hereinafter, the excitation roller 10 and the auxiliary roller 30 included in the rough load tester 1 of the present embodiment will be described in detail.

  First, the configuration of the excitation roller 10 will be described. As shown in FIGS. 3 and 4, the excitation roller 10 has a cylindrical roller main body 11 that receives the connection of the connection shaft 16 described above. The excitation roller 10 is rotatably supported by a bearing such as a bearing provided at a predetermined position below the floor surface 4 a. The excitation roller 10 rotates with a predetermined rotation axis 12 coinciding with the central axis of the roller main body 11 as a rotation center line.

  The excitation roller 10 (the roller main body 11) has a smaller diameter than the wheel 3 of the vehicle 2. In the present embodiment, the outer diameter of the vibration roller 10 is, for example, about 1/3 to 1/2 of the outer diameter of the wheel 3. However, the relative magnitude relationship between the outer diameter of the excitation roller 10 and the outer diameter of the wheel 3 is not particularly limited. In addition, the excitation roller 10 has a length substantially the same as the left and right opening width of the opening 4 b of the floor plate 4.

  The unevenness which the vibration roller 10 has on the outer periphery is formed by one or more projections 13 provided on the outer peripheral surface 11 a of the roller main body 11 which is the outer peripheral surface of the vibration roller 10. In the present embodiment, the concavities and convexities of the excitation roller 10 are formed by the plurality of protrusions 13, and each protrusion 13 has a protrusion block 13a having a predetermined shape such as a substantially rectangular plate shape or a substantially rectangular parallelepiped shape. It is provided by being attached to the roller main body 11.

  The protrusion block 13 a is fixed to the roller body 11 by a fastener such as a bolt so as to protrude from the outer peripheral surface 11 a of the roller body 11 to form a protrusion 13. As described above, by providing the plurality of protrusions 13 on the outer peripheral surface of the roller main body 11, the uneven surface portion is provided on the outer peripheral surface of the vibration roller 10. In the present embodiment, the protrusions 13 of the vibration roller 10 all have the same shape and dimensions. However, protrusions 13 of a plurality of types of shapes and sizes may be provided.

  The affixing pattern of the projection block 13a to the roller body 11, that is, the concavo-convex pattern of the excitation roller 10, is appropriately set as a vibration pattern to be applied to the vehicle 2 according to the type of the actual road surface assumed. In the present embodiment, in the roller main body 11, the parts to which the projection block 13a can be fixed are regularly arranged in the axial direction and the circumferential direction of the roller main body 11. Then, the projection block 13a is fixed to the appropriately selected to-be-adhered portion, whereby a predetermined concavo-convex pattern is formed. The part to be fixed is, for example, a configuration in which a screw insertion hole of a fastener for fixing the projection block 13a is provided in an arrangement space in accordance with the shape and dimensions of the projection block 13a.

  As shown in FIG. 4, the excitation roller 10 according to the present embodiment is divided into three concavo-convex areas 14 (14a, 14b, 14c) in the longitudinal direction (rotational axis direction) of the sticking pattern of the projection block 13a. And three types of uneven patterns. Specifically, the concavo-convex pattern by the sticking of the protrusion blocks 13 a so that the density of the arrangement of the protrusion blocks 13 a gradually increases in order from the concavo-convex area 14 a on the left to the concavo-convex area 14 c on the right Is set. For example, in the uneven region 14a on the left side where the density of the arrangement of the projection blocks 13a is the lowest, the projection 13 group arranged linearly along the axial direction of the roller body 11, that is, in the same phase, It is provided at one place in the circumferential direction of the part 11.

  The excitation rollers 10 of the four excitation support roller mechanism units 5 corresponding to the respective wheels 3 of the vehicle 2 are disposed such that the four wheels 3 are located on the uneven region 14 of the common type . In FIG. 2, the state in which the wheel 3 is located on the uneven | corrugated area | region 14b of the left-right center is shown. The right and left width (dimension in the rotation axis direction of the excitation roller 10) of each uneven region 14 of the excitation roller 10 is a dimension (for example, about 1.5 to 2 times) sufficiently wider than the width of the wheel 3 It is set to.

  Next, the configuration of the auxiliary roller 30 will be described. As shown in FIGS. 3 and 4, the auxiliary roller 30 is rotatably supported by a shaft support 31 such as a bearing provided at a position below the floor 4 a. The auxiliary roller 30 rotates with a predetermined rotation axis 32 coinciding with the central axis of the auxiliary roller 30 as a rotation center line.

  The auxiliary roller 30 has a smaller diameter than the vibration roller 10. In the present embodiment, the outer diameter of the auxiliary roller 30 is, for example, about 1/3 to 1/2 of the outer diameter of the vibration roller 10. However, the relative magnitude relationship between the outer diameter of the auxiliary roller 30 and the outer diameter of the excitation roller 10 is not particularly limited. Further, the auxiliary roller 30 has substantially the same length as the left and right opening width of the opening 4 b of the floor plate 4 as the vibration roller 10 does.

  The auxiliary roller 30 has a flat outer circumferential surface 33 along the circumference in the circumferential direction. In the present embodiment, the auxiliary roller 30 has a cylindrical outer shape elongated in the rotation axis direction, and has an outer peripheral surface 33 along the cylindrical outer shape. That is, the auxiliary roller 30 has a cylindrical surface along the circumference in the circumferential direction and along a straight line in the longitudinal direction (central axis direction) as the outer circumferential surface 33. However, the outer peripheral surface 33 of the auxiliary roller 30 may be a flat surface along the circumference at least in the circumferential direction. Therefore, the outer circumferential surface 33 of the auxiliary roller 30 may be, for example, a surface having irregularities in the width direction of the auxiliary roller 30.

  In the excitation support roller mechanism unit 5 including the excitation roller 10 and the auxiliary roller 30 as described above, the excitation roller 10 is located on the front lower side in the traveling direction of the vehicle 2 with respect to the wheel 3 of the vehicle 2 It is positioned and provided to rotate while circumscribing the wheel 3. That is, the excitation roller 10 abuts on the lower half and the front half of the wheel 3. The relative positional relationship of the excitation roller 10 to the wheel 3 is as follows: the wheel 3 is supported by the excitation roller 10 and the auxiliary roller 30 (hereinafter, the wheel 3 is in the “supported state”). It is a positional relationship.

  Therefore, the auxiliary roller 30 is located on the lower rear side in the traveling direction of the vehicle 2 with respect to the wheel 3 and supports the wheel 3 together with the vibration roller 10. That is, as described above, the auxiliary roller 30 supports the wheel 3 supplementarily at the rear side of the wheel 3 so that the positional relationship of the excitation roller 10 located on the front lower side of the wheel 3 with respect to the wheel 3 is maintained. Do. Therefore, the auxiliary roller 30 abuts on the lower half and the rear half of the wheel 3.

  As shown in FIG. 3, the excitation roller 10 and the auxiliary roller 30 are provided such that their upper ends are positioned at substantially the same height as the floor surface 4 a. The vibration roller 10 has its center of rotation positioned forward of the center of rotation O1 of the wheel 3 in the supported state. That is, the position of the rotation axis 12 of the excitation roller 10 is located forward of the downward vertical line O2 from the rotation center O1 of the wheel 3 in the supported state. In addition, the auxiliary roller 30 has its center of rotation located rearward of the center of rotation O1 of the wheel 3 in the supported state. In other words, the position of the rotation axis 32 of the auxiliary roller 30 is located behind the vertical line O2 downward from the rotation center O1 of the wheel 3 in the supported state.

  In the present embodiment, the vibration roller 10 and the auxiliary roller 30 have a slight gap (see FIG. 4, reference B1) between each other in top view due to the positional relationship between the respective rotation centers and the outer diameter dimension. Are located in However, the excitation roller 10 and the auxiliary roller 30 are arranged such that no gap appears in the top view, that is, the rear end of the excitation roller 10 and the front end of the auxiliary roller 30 overlap vertically. It may be set. The vibration roller 10 and the auxiliary roller 30 abut on the lower side of the front and rear lower portions of the wheel 3, that is, the front and rear positions near the lower end of the wheel 3.

  The excitation roller 10 and the auxiliary roller 30 having the above-described positional relationship with respect to the wheel 3 in the support state support the wheel 3 in a state of being circumscribed with the wheel 3 while keeping the mutual positional relationship constant. Here, the excitation roller 10 brings the uneven surface portion of the plurality of projections 13 into contact with the tire main body 3b of the wheel 3, and the auxiliary roller 30 has the outer peripheral surface 33 which is a cylindrical surface the tire main body 3b of the wheel 3. In the state of being in contact with the surface 3 c), it rotates in the same rotation direction as the vibration roller 10 together with the wheel 3.

  The relative positional relationship between the excitation roller 10 and the auxiliary roller 30 with respect to the supported wheels 3 will be described in detail.

  As described above, the excitation roller 10 and the auxiliary roller 30 are positioned in the front-rear direction via the position of the rotation center O1 of the wheel 3 in the supported state in the front-rear direction. Therefore, with respect to the excitation roller 10, the positional relationship with respect to the wheel 3 in the supported state is defined based on the collision position of the protrusion 13 with the wheel 3 as the wheel 3 rotates. Specifically, the relative position of the excitation roller 10 to the wheel 3 is based on the position vertically below the position of the rotation axis of the wheel 3 at the position where the wheel 3 receives the collision of the projection 13. It is defined based on an angle (hereinafter referred to as “projection collision angle”) α around the rotation axis 3.

  Here, with respect to the projection collision angle α, the position at which the wheel 3 receives the collision of the projection 13 (hereinafter referred to as “projection collision position”) is a roller in the rotational state where the wheel 3 and the excitation roller 10 contact each other. The projection 13 projecting from the outer peripheral surface 11 a of the main body 11 is a position where it first contacts the wheel 3. That is, the projection collision position is a position in the circumferential direction on the outer peripheral surface 3c of the wheel 3, and the excitation roller 10 accompanied by the rotation of the wheel 3 of the vehicle 2 moving forward (left rotation in FIG. 3 (see arrow C1)). The position 13 is a position P1 at which the projection 13 collides with the wheel 3 from the front side in the operation of the rotation (right rotation in FIG. 3 (see arrow C2)).

  For this reason, in the configuration in which the excitation roller 10 is positioned at the lower front of the wheel 3 in the supported state, the projection collision position is on a straight line connecting the rotation center O1 of the wheel 3 and the rotation axis 12 of the excitation roller 10 It is located in the front side (left side in FIG. 3) with respect to the circumscribed position (circumferential center position) P2 of the wheel 3 and the excitation roller 10 located at the position of. For example, in the case of the protrusion 13 which protrudes in a rectangular shape from the outer peripheral surface 11 a of the vibration roller 10 in a side view (view of the rotational shaft direction of the vibration roller 10) as shown in FIG. The position P1 where the corner portion on the side (the front side in the rotational direction of the vibration roller 10) abuts on the outer peripheral surface 3c of the wheel 3 is the projection collision position. The excitation roller 10 and the auxiliary roller 30 are disposed such that the projection collision angle α is less than 45 ° (for example, an angle within the range of 15 to 25 °) with respect to the wheel 3 in the supported state. It will be set up.

  Further, as shown in FIG. 3, the rough load tester 1 according to the present embodiment has a cylinder mechanism 40 for moving the auxiliary roller 30 as a movement mechanism for changing the relative position between the vibration roller 10 and the auxiliary roller 30. Prepare. The cylinder mechanism 40 is an actuator for advancing and retracting the auxiliary roller 30 in a predetermined direction, and changes the relative position of the vibration roller 10 and the auxiliary roller 30 by moving the auxiliary roller 30 in the advancing and retracting direction. .

  The cylinder mechanism 40 is a hydraulic cylinder mechanism operated by hydraulic pressure, and has, for example, a cylindrical cylinder portion 41 and a piston portion 42 coaxially installed in the cylinder portion 41. The auxiliary roller 30 is rotatably supported at the tip of the piston portion 42 via a support member or the like. The piston portion 42 is, for example, a substantially cylindrical member, and is provided so as to be able to extend and retract from one side of the cylinder portion 41 in the cylinder axial direction with respect to the cylinder portion 41. That is, the cylinder mechanism 40 is configured to expand and contract by the action of advancing and retracting from the cylinder portion 41 of the piston portion 42 (advancing and retracting operation).

  The cylinder mechanism 40 is disposed one or more in the longitudinal direction (rotational axis direction) of the auxiliary roller 30. The cylinder mechanism 40 is provided with the cylinder portion 41 supported and fixed in a predetermined position in the underfloor space below the floor plate portion 4 so that the advancing and retracting direction of the piston portion 42 is in a predetermined direction. Therefore, by the advancing and retracting movement of the piston portion 42 in the cylinder mechanism 40, the auxiliary roller 30 provided at the tip end of the piston portion 42 moves in the advancing and retracting direction of the piston portion 42 (see arrow D1).

  The moving direction (arrow D1) of the auxiliary roller 30 by the cylinder mechanism 40 is, for example, an oblique direction from the front upper side to the rear lower side as shown in FIG. By such movement of the auxiliary roller 30, the auxiliary roller 30 located on the rear lower side of the wheel 3 approaches and separates from the vibration application roller 10 located on the front lower side of the wheel 3.

  In addition to the hydraulic cylinder mechanism, the cylinder mechanism 40 may be a cylinder mechanism such as an air cylinder mechanism operated by air pressure. Moreover, about the structure for moving the auxiliary | assistant roller 30, it is not limited to the cylinder mechanism 40, A well-known moving mechanism can be employ | adopted suitably. In addition, the moving direction of the auxiliary roller 30 may be, for example, a horizontal direction or the like, and is not limited to the present embodiment.

  Further, in the rough load tester 1 according to the present embodiment, as described above, the coupling connecting portion 20 is provided on the connecting shaft portion 16 that connects the left and right excitation rollers 10 to each other. According to the coupling connecting portion 20, the relative phase around the rotation axis of the left and right excitation rollers 10 can be changed. Therefore, according to the coupling connecting portion 20, it is possible to adjust the relative phase of the unevenness of the left and right excitation rollers 10. As described above, in the present embodiment, the coupling connecting portion 20 provided on the connecting shaft portion 16 connecting the front and rear right and left vibration rollers 10 is a relative of the unevenness of the pair of left and right vibration rollers 10. It functions as a phase adjustment unit for adjusting the phase.

  Further, in the rough load tester 1 according to the present embodiment, as shown in FIG. 2, positions near the left and right ends of the excitation roller 10 and the auxiliary roller 30, that is, the opening edge of the opening 4 b of the floor plate 4 A side roller 45 is provided at a nearby position. The side roller 45 is for restricting the wheel 3 from being out of the range of the uneven surface portion of the vibration roller 10 in the lateral direction (axial direction of the vibration roller 10) during the traveling test of the vehicle 2 . The side roller 45 is rotatably supported with the vertical direction as the rotation axis direction. The side roller 45 is provided to be in contact with the portion of the tire main body 3 b below the wheel 3 a of the wheel 3 in the supported state. In FIG. 4, the side roller 45 is not shown.

  The procedure of the running test by the rough load tester 1 of the present embodiment as described above will be described. During the traveling test, the vehicle 2 to be tested travels on the floor 4 a and rides on the rough load tester 1 so that each wheel 3 is positioned on the corresponding excitation support roller mechanism 5. As a result, each wheel 3 of the vehicle 2 is positioned on the excitation roller 10 and the auxiliary roller 30, and is in a supported state.

  Here, in the rough load tester 1, in order to correspond to different wheel bases (distance between the front and rear wheels 3) of the vehicle 2 to be tested depending on the vehicle type, relative to the front and rear vibration support roller mechanism 5 A moving mechanism (not shown) is provided to change the position. The moving mechanism is, for example, a mechanism provided with an actuator such as a hydraulic cylinder, and integrally moves the pair of left and right excitation support roller mechanisms 5 on the front side or the rear side in the front-rear direction. Here, in order to maintain the tension of the transmission belt 17 for synchronously rotating the front and rear vibration rollers 10, for example, a tension adjustment for interlocking movement of the pair of left and right vibration support roller mechanisms 5 in the front-rear direction A tension pulley that is displaced by the cylinder mechanism is provided to the transmission belt 17. The positional adjustment of the front and rear vibration support roller mechanism 5 according to the type of vehicle is automatically performed, for example, by the operation control of the vibration support roller mechanism 5 based on the result of discrimination of the vehicle type using code recognition and the like.

  As described above, the vehicle 2 travels at an arbitrary speed in a state where the wheels 2 are positioned on the corresponding excitation support roller mechanism unit 5 and the vehicle 2 is set, and accordingly, the wheels 3 are rotationally driven. As a result, the excitation roller 10 and the auxiliary roller 30 in a state of being in contact with the respective wheels 3 rotate. As a result, while the position of the vehicle 2 in the front-rear direction is held, a traveling state in which the uneven surface portion of the vibration roller 10 is simulated on the road surface is obtained, and the vehicle 2 vibrates due to the uneven surface portion of the vibration roller 10 Be added.

  In the test running state, the steering of the vehicle 2 moves the vehicle 2 to the left and right, and the position in the left-right direction is adjusted. Therefore, the adjustment of the steering of the vehicle 2 appropriately changes the type of the uneven area 14 (14a, 14b, 14c) in which the wheel 3 on the excitation roller 10 is positioned. Thereby, the vibration pattern applied to the vehicle 2 is appropriately changed. In this manner, the traveling condition of the vehicle 2 on the actual road surface is reproduced, and the driver or the passenger of the vehicle 2 becomes a tester, and as the traveling test of the vehicle 2, for example, noise, noise, vibration, etc. of the vehicle 2. Sensory inspection etc. are performed.

  According to the rough load tester 1 of the present embodiment described above, it is possible to easily obtain a vibration state similar to the vehicle vibration when traveling on an actual road surface, for the vehicle 2 to be inspected. The fact that such an effect is obtained will be described by taking a conventional biaxial configuration as a comparative example to the rough load tester 1 of the present embodiment.

  As shown in FIG. 5 (a), when the vehicle 2 travels on a real road surface (general road surface), when the wheel 3 passes over the projection 102 existing on the real road surface 101, the wheel 3 projects in the front portion near the lower end. Receive 102 collisions. Here, for the protrusion 102 on the actual road surface 101, an angle similar to the above-described protrusion collision angle α is taken as a collision angle α1. That is, the collision angle α1 is an angle around the rotation axis of the wheel 3 with respect to the position of the rotation axis of the wheel 3 (rotation center O1) at the collision position P3 at which the wheel 3 receives the collision of the projection 102 It is. The projections 102 on the actual road surface 101 are assumed to be similar to the projections 13 of the excitation roller 10 according to the present embodiment, and the wheel 3 can easily get over the wheel 3 with respect to the wheel 3. Small enough.

  The collision position P3 of the protrusion 102 on the actual road surface 101 with respect to the wheel 3 is a position near the lower end position of the wheel 3. For this reason, the collision angle α1 is a relatively small angle of, for example, about 15 °.

  On the other hand, as shown in FIG. 5 (b), in the two-shaft type configuration in which two vibration application rollers 110 are disposed for each wheel 3 in front and back, the wheel 3 is disposed between the front and rear application rollers 110. The driving test is conducted in a manner that drops the For this reason, the collision position P4 with respect to the wheel 3 of the projection 113 on the outer periphery of the front side excitation roller 110A is positioned significantly higher than the collision position P3 with respect to the wheel 3 during traveling on the actual road surface. . This means that, in the two-axis configuration, the collision position P4 of the projection 113 is positioned above the position (see the straight line L1) of the lower end of the wheel 3 contacting the actual road surface 101 when traveling on the actual road surface. by.

  Here, with respect to the protruding portion 113 on the outer periphery of the excitation roller 110A on the front side, an angle similar to the above-described protrusion collision angle α is taken as a collision angle α2. That is, the collision angle α2 is the rotation axis of the wheel 3 based on the position vertically below the rotation center O1 of the wheel 3 at the collision position P4 at which the wheel 3 receives the collision of the projection 113 of the excitation roller 110A on the front side. It is an angle around. The projection 113 of the excitation roller 110 assumes the projection 13 of the excitation roller 10 according to this embodiment.

  The collision position P4 with respect to the wheel 3 of the protrusion 113 of the outer periphery of the front side excitation roller 110A in the two-axis configuration is located substantially above the lower end position of the wheel 3. For this reason, the collision angle α2 becomes larger than the collision angle α1 at the time of traveling on the actual road surface, and becomes a relatively large angle of, for example, about 45 °.

  Here, with regard to the collision of the protrusion 102 on the actual road surface 101 and the protrusion 113 of the excitation roller 110 against the wheel 3, attention is paid to the components in the longitudinal direction (horizontal direction) and the vertical direction (vertical direction) of the input due to the collision. The magnitude of the collision input to the wheel 3 is related to the magnitude of the vibration. That is, the larger the component of the input to the wheel 3, the larger the vibration in that direction.

  As shown in FIG. 5A, when traveling on an actual road surface, the component in the front-rear direction (the component facing backward) a1 is smaller than the component in the vertical direction (the component facing upward) a2 regarding the component of the input due to the collision. That is, with regard to the vibration of the vehicle 2 due to the collision of the projection 102 with the wheel 3 during actual road traveling, the vibration (shaking) of the vehicle 2 in the front-rear direction becomes relatively weak, and the vibration (shaking) of the vehicle 2 in the vertical direction is compared. Become stronger.

  On the other hand, as shown in FIG. 5B, in the configuration of the two-axis type, the component b1 in the front-rear direction becomes larger with respect to the component of the input due to the collision when compared with the actual road surface traveling. The component b2 becomes smaller. In other words, with regard to the vibration of the vehicle 2 due to the collision of the protrusion 113 with the wheel 3 in the two-axis configuration, the vibration (shake) in the front-rear direction of the vehicle 2 becomes relatively strong, and the vibration (shake) in the vertical direction of the vehicle 2 Is relatively weak. Therefore, for example, when trying to increase the input component in the vertical direction as in the case of traveling on a real road surface in the configuration of the two-axis type, there arises a problem that the input component in the front and rear direction also increases accordingly.

  As described above, in the case of the two-shaft configuration, the vibration state (the sway) of the vehicle 2 obtained by the projection 113 of the vibration roller 110 is largely different from the vibration state of the vehicle 2 when traveling on the actual road surface. As a traveling test simulating a traveling environment on the actual road surface 101, it becomes difficult to obtain sufficient test results.

  Therefore, as shown in FIG. 5C, the rough load tester 1 according to the present embodiment has a configuration in which the wheel 3 is dropped between the front and rear vibration rollers 110 such as a two-shaft configuration (FIG. 5B). Unlike the above, the wheel 3 is supported by the vibration roller 10 and the auxiliary roller 30 in a state where the wheel 3 is placed on the single-axis vibration roller 10. In other words, a state in which the wheel 3 is placed on the excitation roller 10 located on the front lower side of the wheel 3 is obtained as a support state of the wheel 3 by the excitation roller 10 and the auxiliary roller 30. Therefore, the relative position of the auxiliary roller 30 to the vibration roller 10, the diameter of the auxiliary roller 30, and the like are maintained in the state where the wheel 3 is placed on the vibration roller 10 located on the front lower side of the wheel. Set to be

  According to the rough load tester 1 of the present embodiment, the projection collision angle α can be adjusted by the arrangement position of the auxiliary roller 30 with respect to the excitation roller 10. This makes it possible to make the projection collision angle α as close as possible to the collision angle α1 (see FIG. 5A) when traveling on an actual road surface. That is, according to the rough load tester 1 of the present embodiment, the collision position P1 of the projection 13 with respect to the wheel 3 is a position near the lower end of the wheel 3 and the collision position P3 of the projection 102 with respect to the wheel 3 during actual road traveling. It is possible to approach as close as possible.

  Therefore, as shown in FIG. 5C, in the rough load tester 1 according to the present embodiment, the component c1 in the front-rear direction and the component c2 in the vertical direction with respect to the components of the input due to the collision It can be as close as possible to the directional component a1 and the vertical component a2. That is, with regard to the vibration of the vehicle 2 due to the collision of the protrusion 13 with the wheel 3 in the rough load tester 1 of the present embodiment, the vibration (sway) in the front-rear direction of the vehicle 2 becomes relatively weak as in traveling on an actual road surface. The vibration (swing) in the vertical direction of the vehicle 2 becomes relatively strong.

  In the rough load tester 1 of the present embodiment, the projection collision angle α is such that at least the vertical component of the input received by the collision of the wheel 3 from the projection 13 of the excitation roller 10 is larger than the longitudinal component. Set to From this point of view, the excitation roller 10 and the auxiliary roller 30 are disposed such that the projection collision angle α is less than 45 ° with respect to the wheel 3 in the supported state.

  Further, preferably, the excitation roller 10 and the auxiliary roller 30 are disposed such that the projection collision angle α is in the range of 15 to 25 ° with respect to the wheel 3 in the supported state. As a result, the input components in the vertical direction and the front-rear direction due to the collision of the projection 13 with the wheel 3 in the support state can be effectively brought close to the input components in each direction when traveling on an actual road surface.

  Although the size of the projection collision angle α is not particularly limited, for example, from the viewpoint of obtaining a stable support state of the wheel 3 by the excitation roller 10 and the auxiliary roller 30, the projection collision angle α is 15 It is preferable that the angle be larger than °. Further, from the viewpoint of approaching the collision angle α1 when traveling on an actual road surface, the projection collision angle α is preferably smaller than 25 °.

  As described above, according to the rough load tester 1 of the present embodiment, the arrangement configuration of the excitation roller 10 and the auxiliary roller 30 can provide a vibration state similar to vehicle vibration when traveling on an actual road surface. Further, according to the rough load tester 1 of the present embodiment, since the projection collision angle α can be adjusted by the arrangement position of the auxiliary roller 30 with respect to the excitation roller 10, the size of the wheel 3 and the market environment can be obtained. Accordingly, a flexible structure capable of changing the projection collision angle α is realized.

  In addition, the collision position P1 of the projection 13 of the excitation roller 10 with the wheel 3 is made closer to the collision position P3 of the projection 102 during traveling on the actual road surface while avoiding the interference of the excitation roller 10 and the auxiliary roller 30 with each other. From this point, it is preferable that the auxiliary roller 30 have a smaller diameter than the vibration roller 10. That is, by setting the auxiliary roller 30 to a smaller diameter (for example, about 1/3 to 1/2) than the vibration roller 10, it is possible to easily realize a vibration state similar to the vehicle vibration when traveling on an actual road surface. it can.

  Further, in the two-shaft configuration as shown in FIG. 5B, the exciting action by the projection 113 of the exciting roller 110B on the rear side of the wheel 3 is performed when the vehicle 2 traveling on the actual road surface 101 advances. It is an action which the wheel 3 does not receive. That is, since the vehicle 2 moving forward on the actual road surface 101 receives the collision of the projection 102 from the front side of the wheel 3 by riding on the projection 102 on the actual road surface 101, basically, the vehicle 2 on the actual road surface 101 behind the wheel 3 There is no collision due to the projection 102 of the lens. For this reason, the excitation action by the rear side excitation roller 110B in the two-shaft configuration can be an obstacle to reproducing the vehicle vibration when traveling on an actual road surface.

  In this respect, according to the rough load tester 1 of the present embodiment, the excitation roller 10 for applying vibration to the wheel 3 is present only on the front side of the wheel 3 and the rear side of the wheel 3 is circumferential along the circumferential direction. It is supported by an auxiliary roller 30 having a flat outer peripheral surface 33. With such a configuration, unnecessary vibration components such as vibration components due to the vibration action of the rear vibration roller 110B in the case of the two-shaft configuration do not occur. From such a point as well, it is possible to obtain a vibration state similar to the vehicle vibration when traveling on an actual road surface.

  Further, in the rough load tester 1 according to the present embodiment, a cylinder mechanism 40 for moving the auxiliary roller 30 is provided as a movement mechanism for changing the relative position between the vibration roller 10 and the auxiliary roller 30. By adopting the movable auxiliary roller 30 in this manner, the positions of the auxiliary roller 30 and the wheel 3 with respect to the vibration roller 10 can be arbitrarily set within the movable range of the auxiliary roller 30, as indicated by a two-dot chain line in FIG. Can be adjusted. Thereby, it is possible to arbitrarily change the projection collision angle α with respect to the wheel 3. As a result, it becomes possible to easily change the relative positional relationship between the excitation roller 10 and the auxiliary roller 30 depending on the type of the vehicle 2 and the aspect of the uneven surface portion of the excitation roller 10, and various conditions It is possible to easily cope with the reproduction on the actual road surface under the vehicle.

  Further, in the rough load tester 1 of the present embodiment, a phase for adjusting the relative phase of the unevenness of the pair of left and right excitation rollers 10 to the connecting shaft portion 16 connecting the left and right excitation rollers 10 to each other. A coupling connecting portion 20 is provided as the adjusting portion. According to such a configuration, by changing the phase of the unevenness of the excitation roller 10 on the left and right by the coupling connecting portion 20, the collision of the protrusion 13 with the wheel causes a wide direction (horizontal direction) of the input due to the collision. It is possible to adjust the components of.

  Thereby, in addition to the adjustment of the vibration in the front-rear direction and the vertical direction by the adjustment of the projection collision angle α based on the arrangement relationship of the excitation roller 10 and the auxiliary roller 30 as described above, for example It becomes possible to adjust also about the vibration of direction. As a result, with regard to the vibration applied to the vehicle 2 by the vibration roller 10, it is possible to adjust the vibration component (input component) three-dimensionally in the front-rear direction, the vertical direction, and the left-right direction. The reproducibility of can be improved.

Second Embodiment
A second embodiment of the present invention will be described. In the following description, the same reference numerals are used for the contents common to the first embodiment, and the description is omitted. As shown in FIG. 6 and FIG. 7, the rough load tester 51 according to the present embodiment includes the safety roller 60 that holds the support state of the wheel 3 by the excitation roller 10 and the auxiliary roller 30. Different from Rough Road Tester 1.

  The safety roller 60 has its rotational axis parallel to the rotational axis of the wheel 3 of the vehicle 2 (left and right direction in FIG. 7) as the vibration roller 10 and the like, and is disposed at a position corresponding to each wheel 3 . That is, the safety roller 60 is disposed for each of the left and right front wheels 3F and rear wheels 3R. The safety rollers 60 are disposed in front and rear pairs with respect to the respective wheels 3 so as to sandwich the wheels 3 from the front and rear. That is, two safety rollers 60 are provided in front of and behind each wheel 3, that is, two axes of rotation shafts.

  The safety roller 60 contacts the wheel at a position higher than the vibration roller and the auxiliary roller, thereby maintaining the support state of the wheel 3 by the vibration roller 10 and the auxiliary roller 30. The safety roller 60 is disposed so as to always contact or substantially contact the outer peripheral surface 3c of the wheel 3 or open a slight gap with the outer peripheral surface 3c of the wheel 3 with respect to the wheel 3 in a supported state. Further, it prevents the wheels 3 from being separated in the front-rear direction from the support state by the excitation roller 10 and the auxiliary roller 30. The arrangement position of the safety roller 60 with respect to the wheel 3 in the supported state is the operation position of the safety roller 60.

  The safety roller 60 is rotatably supported by a predetermined bearing 61 such as a bearing. The safety roller 60 rotates with a predetermined rotation axis 62 coinciding with the central axis of the safety roller 60 as a rotation center line.

  The safety roller 60 has substantially the same diameter as the auxiliary roller 30 or a smaller diameter than the auxiliary roller 30. However, the outer diameter of the safety roller 60 is not particularly limited, such as the relative magnitude relationship between the outer diameter of the safety roller 60 and the auxiliary roller 30. Further, the safety roller 60 has a slightly shorter length than the vibration roller 10 and the auxiliary roller 30 (see FIG. 7). However, the safety roller 60 may have substantially the same length as the left and right opening width of the opening 4 b of the floor plate 4 as the vibration roller 10 and the like.

  The safety roller 60 has a flat outer circumferential surface 63 along the circumference in the circumferential direction. In the present embodiment, like the auxiliary roller 30, the safety roller 60 has a cylindrical outer shape elongated in the rotation axis direction, and has an outer peripheral surface 63 along the cylindrical outer shape. However, the outer peripheral surface 63 of the safety roller 60 may be a flat surface along the circumference at least in the circumferential direction. Therefore, the outer circumferential surface 63 of the safety roller 60 may be, for example, a surface having irregularities in the width direction of the safety roller 60.

  As shown in FIGS. 6 and 8, the safety roller 60 is movably provided by the safety roller moving mechanism 70. The safety roller moving mechanism 70 moves the safety roller 60 to change the position of the safety roller 60 with respect to the vibration roller 10 and the auxiliary roller 30. In other words, the safety roller moving mechanism 70 moves the safety roller 60 in order to change the position of the safety roller 60 with respect to the wheel 3 supported by the vibration roller 10 and the auxiliary roller 30.

  The safety roller moving mechanism 70 has a lower cylinder mechanism 71 as a first cylinder mechanism and an upper cylinder mechanism 72 as a second cylinder mechanism provided on the upper side of the lower cylinder mechanism 71. It is configured as a two-stage hydraulic cylinder mechanism in the direction and the oblique direction. The lower cylinder mechanism unit 71 vertically moves the safety roller 60 via the upper cylinder mechanism unit 72. The upper cylinder mechanism 72 moves in the vertical direction by the lower cylinder mechanism 71 and moves the safety roller 60 in an oblique direction. The upper cylinder mechanism portion 72 moves the safety roller 60 from the lower side to the upper side in an oblique direction approaching the wheel 3 in the supported state.

  The safety roller moving mechanism 70 is formed in a bent shape as a whole by a lower cylinder mechanism portion 71 extending in the vertical direction in the lower portion and an upper cylinder mechanism portion 72 extending in the diagonal direction in the upper portion. . In the present embodiment, the safety roller moving mechanism 70 is provided for all the safety rollers 60 disposed before and after each wheel 3. The two safety roller moving mechanisms 70 corresponding to the respective wheels 3 are configured to be substantially symmetrical back and forth including the safety roller 60. A pair of safety roller moving mechanisms 70 corresponding to the respective wheels 3 are disposed on the front and rear outer sides with respect to the excitation roller 10 and the auxiliary roller 30 in each excitation support roller mechanism unit 5.

  As shown in FIG. 8, the lower cylinder mechanism section 71 is constituted by a hydraulic cylinder mechanism operated by oil pressure, and has a lower cylinder section 73 and a lower piston section 74 internally installed in the lower cylinder section 73. The lower piston portion 74 is, for example, a substantially cylindrical member, and is provided so as to be able to protrude and retract from one end side of the lower cylinder portion 73 with respect to the lower cylinder portion 73. That is, the lower cylinder mechanism section 71 is configured to expand and contract in the up and down direction by the advancing / retracting operation (advancing / retracting operation) from the lower cylinder section 73 of the lower piston section 74.

  The upper cylinder mechanism portion 72 is constituted by a hydraulic cylinder mechanism as in the lower cylinder mechanism portion 71, and has an upper cylinder portion 75 and an upper piston portion 76 internally provided in the upper cylinder portion 75. The upper piston portion 76 is, for example, a substantially cylindrical member, and is provided so as to be able to protrude and retract from one end side of the upper cylinder portion 75 with respect to the upper cylinder portion 75. That is, the upper stage cylinder mechanism section 72 is configured to expand and contract in the oblique direction by the action of advancing and retracting from the upper stage cylinder section 75 of the upper stage piston section 76.

  An upper cylinder portion 75 is provided on the tip end side of the lower piston portion 74 so as to move integrally with the lower piston portion 74. With this configuration, the upper cylinder portion 75 moves in the vertical direction along with the operation of the lower piston portion 74 in the vertical direction. The safety roller 60 is rotatably supported at the tip of the upper stage piston portion 76 via a support member or the like.

  The safety roller moving mechanism 70 is disposed one or more in the longitudinal direction (rotational axis direction) of the safety roller 60. The safety roller moving mechanism 70 has the lower cylinder portion 73 fixedly provided at a predetermined position in the underfloor space below the floor plate portion 4 so that the advancing and retracting directions of the lower piston portion 74 and the upper piston portion 76 are predetermined. It is provided to

  As shown in FIG. 8, in the safety roller moving mechanism 70, the upper cylinder mechanism portion 72 provided on the tip end side of the lower piston portion 74 is the advancing / retracting direction of the lower piston portion 74 by the advancing / retracting operation of the lower piston portion 74. It moves in the up and down direction (see arrow E1). Further, the safety roller 60 provided on the tip end side of the upper stage piston portion 76 is moved in an oblique direction (see arrow E2) which is the advancing and retreating direction of the upper stage piston portion 76 by the advancing and retracting operation of the upper stage piston portion 76.

  Here, the moving direction (arrow E2) of the safety roller 60 by the upper stage cylinder mechanism portion 72 is an oblique direction approaching the wheel 3 in the supported state from the lower side to the upper side. That is, in the safety roller moving mechanism 70 (70F) located on the front side of the wheel 3 in the supported state, the moving direction of the safety roller 60 by the upper stage cylinder mechanism portion 72 is the inclination direction of the front lowering (rear rising) In the safety roller moving mechanism 70 (70R) located on the rear side of the wheel 3 in the state, it is the inclination direction of the front upward (backward).

  In addition to the hydraulic cylinder mechanism, each cylinder mechanism portion constituting the safety roller moving mechanism 70 may be configured by an air cylinder mechanism or the like that operates with pneumatic pressure. However, from the viewpoint of firmly supporting the wheel 3 in the support state and stabilizing the projection collision angle when reproducing the actual traveling of the vehicle 2 on the actual road surface, a compressible fluid such as a hydraulic cylinder is used as the configuration of the safety roller moving mechanism 70. It is preferable to adopt a configuration that operates by Further, the configuration for moving the safety roller 60 is not limited to the safety roller moving mechanism 70, and a known moving mechanism can be adopted as appropriate. Further, the moving direction of the safety roller 60 is not limited to the vertical direction and the oblique direction as in the present embodiment. The movement direction of the safety roller 60 may include, for example, the horizontal direction, or may be either the oblique direction or the vertical direction as a whole.

  As described above, the rough load tester 1 according to the present embodiment includes the safety roller moving mechanism 70 as a moving mechanism for moving the safety roller 60 to change the position of the safety roller 60 with respect to the vibration roller 10 and the auxiliary roller 30. Prepare.

  According to the rough load tester 51 of the present embodiment as described above, in the procedure of the traveling test as described above, when loading the vehicle 2 to be tested, as shown in FIG. The safety roller moving mechanism 70 is accommodated under the floor 4 a. That is, when the vehicle 2 gets in and the wheels 3 are positioned on the corresponding excitation roller 10 and auxiliary roller 30, the safety roller 60 is stored so that the safety roller 60 does not interfere with the wheel 3. Become.

  In the storage state of the safety roller 60, the lower cylinder mechanism portion 71 and the upper cylinder mechanism portion 72 both store most of the piston portion (74, 76) in the cylinder portion (73, 75). 60 is positioned at the lower end and the front and rear outer ends with respect to the movement range. In such a state, for example, the safety roller 60 has its upper end positioned at substantially the same height as the floor 4a.

  Then, after the vehicle 2 is set after the positional adjustment between the front and back vibration supporting roller mechanism 5 according to the wheel base of the vehicle 2 as described above, the safety roller 60 operates by the operation of the safety roller moving mechanism 70. It moves from the stored position to a predetermined operating position (see FIG. 8) for supporting the wheel 3 in the supported state. The amount of movement of the safety roller 60 from the storage position to the operation position, that is, the operation position of the safety roller 60 is preset as the amount of movement of the safety roller 60 by the lower cylinder mechanism portion 71 and the upper cylinder mechanism portion 72.

  Specifically, the operation position of the safety roller 60 is a position higher than the contact position of the excitation roller 10 and the auxiliary roller 30 with respect to the wheel 3 and is a wheel 3 such as a bumper or mud guard constituting the body of the vehicle 2. Depending on the shape of the surrounding parts, etc., the position is set so as not to interfere with these parts. Therefore, the operating position of the safety roller 60 is, for example, a position adjusted individually according to the front and rear disposition positions of the front wheel 3F and the rear wheel 3R according to the type of the vehicle 2 and the like.

  Further, according to the safety roller moving mechanism 70, the amount of movement of the safety roller 60 from the storage state to the operation position is different depending on the size of the wheel 3 of the vehicle 2, each of the lower cylinder mechanism 71 and the upper cylinder mechanism 72 It is adjusted as the movement amount by. FIG. 9 (b) shows the case where the wheel 3 supported by the excitation roller 10 and the auxiliary roller 30 is a wheel 3X having a relatively small outer diameter. Further, FIG. 9 (c) shows a case where the wheel 3 supported by the excitation roller 10 and the auxiliary roller 30 is a wheel 3Y having a relatively large outer diameter.

  The adjustment of the movement amount of the safety roller 60 by the safety roller movement mechanism 70, that is, the position adjustment for the operation position is automatically performed by the operation control of the safety roller movement mechanism 70 based on the result of vehicle type determination using code recognition or the like. Be done. Therefore, the position adjustment of the safety roller 60 by the safety roller moving mechanism 70 uses, for example, the determination result of the type of vehicle used for the position adjustment between the front and rear vibration support roller mechanism 5 according to the wheel base as described above. It can be carried out.

  According to the rough load tester 51 of the present embodiment described above, in addition to the fact that the vibration state similar to the vehicle vibration when traveling on the actual road surface can be easily obtained for the vehicle 2 as described above Since the movement of the front and rear direction of the wheel 3 can be restricted, it is possible to prevent the vehicle 2 from jumping out during the test, and a stable test running state of the vehicle 2 can be obtained.

  Further, according to the configuration provided with the safety roller moving mechanism 70 as the movement mechanism of the safety roller 60, the position adjustment of the safety roller 60 can be easily performed, and the wheels 3 having different sizes depending on the vehicle type etc. can be easily coped with. It becomes possible. As a result, the test time can be shortened, and efficient tests can be performed on automobile production lines and the like. Furthermore, a more efficient test can be performed by adopting a configuration in which the position of the safety roller 60 is automatically adjusted by the operation control of the safety roller moving mechanism 70 based on the result of vehicle type determination using code recognition or the like. Is possible.

Third Embodiment
A third embodiment of the present invention will be described. As shown in FIG. 10, in the rough load tester according to the present embodiment, in addition to the auxiliary roller 30, the second auxiliary roller 80 is provided on the front side of the excitation roller 10 in each excitation support roller mechanism unit 5. It is done. The second auxiliary roller 80 is configured to be symmetrical with the auxiliary roller 30 in the front-rear direction via the excitation roller 10.

  That is, the second auxiliary roller 80 is disposed at a position corresponding to each wheel 3 with its rotation axis direction parallel to the rotation axis direction of the wheels 3 of the vehicle 2, that is, the rotation axis direction of the excitation roller 10 . Further, the second auxiliary roller 80 is rotatably supported by a shaft supporting portion such as a bearing provided at a position lower than the floor surface 4a, and a predetermined rotation axis 82 coinciding with the central axis thereof is taken as a rotation center line Rotate. Further, like the auxiliary roller 30, the second auxiliary roller 80 is smaller in diameter than the vibration roller 10, and has a flat outer peripheral surface 83 along the circumference in the circumferential direction.

  Thus, according to the configuration in which the auxiliary rollers (30, 80) supporting the wheel 3 together with the vibration roller 10 are provided before and after the vibration roller 10, the direction of the vehicle 2 is not changed. In addition to the forward traveling, the traveling test can be performed during the backward traveling (back traveling) of the vehicle 2. That is, in the traveling test during forward traveling of the vehicle 2, as described above, the excitation roller 10 positioned on the front lower side of the wheel 3 and the auxiliary roller 30 positioned on the rear lower side of the wheel 3 A support state is obtained (see FIG. 10, two-dot chain line). On the other hand, in the traveling test during reverse traveling of the vehicle 2, the excitation roller 10 is positioned at the rear lower side of the wheel 3 and the second auxiliary roller 80 is positioned at the front lower side of the wheel 3. The wheel 3 is supported by the excitation roller 10 and the second auxiliary roller 80.

  In FIG. 10, the direction of the arrow A1 is the forward direction of the vehicle 2, and the direction of the arrow A2, which is the opposite direction, is the reverse direction of the vehicle 2. In the running test when the vehicle 2 travels in the reverse direction, the wheels 3 rotate in the opposite direction (see arrow C3) as they move forward, and when the exciting roller 10 travels forward as the wheels 3 rotate And rotate in the opposite direction (see arrow C4). The second auxiliary roller 80 rotates in the same rotation direction as the vibration roller 10 together with the wheel 3 in a state where the outer peripheral surface 83 is in contact with the tire main body 3 b (the outer peripheral surface 3 c) of the wheel 3.

  According to the rough load tester of the present embodiment as described above, by moving the vehicle 2 slightly back and forth, the supporting state of the wheel 3 during advancing by the vibration roller 10 and the auxiliary roller 30 can be obtained. It becomes possible to easily change the state of support at the time of reverse movement by the vibration roller 10 and the second auxiliary roller 80. This makes it possible to easily carry out a running test when the vehicle travels backward on the actual road surface, and to obtain a vibration state similar to that of the vehicle traveling on the actual road surface even when the vehicle 2 travels backward. Also in the rough load tester according to the present embodiment, as in the rough load tester 51 of the second embodiment, a configuration provided with the safety roller 60 and the safety roller moving mechanism 70 can be adopted.

  The rough load tester according to the present invention described using the embodiment as described above is not limited to the above-described embodiment, and various aspects can be adopted within the scope of the present invention.

  In the embodiment described above, the cylinder mechanism 40 for moving the auxiliary roller 30 is provided as a moving mechanism for changing the relative position between the vibration roller 10 and the auxiliary roller 30, but the present invention is limited thereto. It is not a thing. That is, as a moving mechanism for changing the relative position of the excitation roller 10 and the auxiliary roller 30, instead of or in addition to the movement mechanism for moving the auxiliary roller 30, the excitation roller 10 is moved. A moving mechanism may be provided.

  Further, in the embodiment described above, both of the left and right front wheels 3F and the left and right rear wheels 3R are mutually connected by the connection shaft portion 16, and the coupling connection portion 20 is provided in each connection shaft portion 16. Not limited to this. The coupling connecting portion 20 may be provided only to either the connecting shaft portion 16 connecting the left and right front wheels 3F or the connecting shaft portion 16 connecting the left and right rear wheels 3R.

  Further, in the above-described embodiment, the safety rollers 60 are disposed on the front and rear sides of all the wheels 3, but the invention is not limited thereto. It may be provided on at least one side. Therefore, the safety roller 60 is provided, for example, only on either the front side or the rear side of each wheel 3, or the front wheel 3F is only on the front side (or rear side), and the rear wheel 3R is on the rear side (or front side) It may be provided only).

  Moreover, in the embodiment described above, although the unevenness on the outer periphery of the vibration roller 10 is formed by providing the protruding portion 13 which is a protruding portion, the present invention is not limited to this. That is, the unevenness on the outer periphery of the vibration roller 10 may be formed by providing at least one of a convex portion and a concave portion, and it may be a portion having an uneven shape in the circumferential direction of the vibration roller 10.

  In the above-described embodiment, the vehicle 2 is a passenger car, but the present invention can be widely applied to general vehicles.

DESCRIPTION OF SYMBOLS 1 Rough load tester 2 Vehicle 3 Wheel 3F Front wheel 3R Rear wheel 10 Excitation roller 13 Protrusion part 16 Coupling shaft part 20 Coupling coupling part (phase adjustment part)
30 Auxiliary roller 33 Outer peripheral surface 40 Cylinder mechanism 60 Safety roller 70 Safety roller moving mechanism 80 Second auxiliary roller

Claims (6)

A rough road tester for applying a vibration to a vehicle to be inspected to test the running of the vehicle,
Irregularities are provided on the outer periphery, and the rotation axis direction is parallel to the rotation axis direction of the wheels of the vehicle, and is located on the front lower side in the traveling direction of the vehicle with respect to the wheels and rotates in a state of circumscribed contact with the wheels Vibration roller,
It has a flat outer peripheral surface along the circumference at least in the circumferential direction, the rotation axis direction is parallel to the rotation axis direction of the wheel, and is positioned behind and below the traveling direction with respect to the wheel, the excitation And an auxiliary roller supporting the wheel with the roller .
The rough load tester , wherein the auxiliary roller has a smaller diameter than the vibration roller . A rough road tester for applying a vibration to a vehicle to be inspected to test the running of the vehicle,
Irregularities are provided on the outer periphery, and the rotation axis direction is parallel to the rotation axis direction of the wheels of the vehicle, and is located on the front lower side in the traveling direction of the vehicle with respect to the wheels and rotates in a state of circumscribed contact with the wheels Vibration roller,
It has a flat outer peripheral surface along the circumference at least in the circumferential direction, the rotation axis direction is parallel to the rotation axis direction of the wheel, and is positioned behind and below the traveling direction with respect to the wheel, the excitation An auxiliary roller supporting the wheel with the roller;
A rough load tester, comprising: a moving mechanism that changes a relative position between the vibration roller and the auxiliary roller by moving at least one of the vibration roller and the auxiliary roller . A rough road tester for applying a vibration to a vehicle to be inspected to test the running of the vehicle,
Irregularities are provided on the outer periphery, and the rotation axis direction is parallel to the rotation axis direction of the wheels of the vehicle, and is located on the front lower side in the traveling direction of the vehicle with respect to the wheels and rotates in a state of circumscribed contact with the wheels Vibration roller,
It has a flat outer peripheral surface along the circumference at least in the circumferential direction, the rotation axis direction is parallel to the rotation axis direction of the wheel, and is positioned behind and below the traveling direction with respect to the wheel, the excitation And an auxiliary roller supporting the wheel with the roller .
The vehicle has a pair of left and right front wheels and rear wheels as the wheels,
The pair of excitation rollers corresponding to at least one of the pair of left and right front wheels and the pair of left and right rear wheels are connected to each other by a connecting shaft so as to integrally rotate coaxially.
The rough load tester, wherein the connecting shaft portion is provided with a phase adjusting portion for adjusting a relative phase of the unevenness of the pair of vibration applying rollers . The unevenness is formed by one or more projections provided on the outer peripheral surface of the vibration roller.
The excitation roller and the auxiliary roller have an angle of about 15 degrees around the rotation axis of the wheel based on a position vertically below the position of the rotation axis of the wheel at a position where the wheel receives a collision of the protrusion. It arrange | positions so that it may become an angle within the range of -25 degrees. The rough load tester of any one of the Claims 1-3 characterized by the above-mentioned. The wheel is provided on at least one of the front side and the rear side in the traveling direction with respect to the wheel, and contacts the wheel at a position higher than the vibration roller and the auxiliary roller, and the vibration roller and the auxiliary roller The rough load tester according to any one of claims 1 to 4 , further comprising a safety roller that holds the support state of the wheel according to. The rough load tester according to claim 5 , further comprising: a moving mechanism that moves the safety roller to change the position of the safety roller with respect to the vibration roller and the auxiliary roller.

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