JP2010145209A - Arrangement for testing wheel suspension of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle wheel suspension testing arrangement capable of making the behavior of a suspension or the like of a vehicle similar to that in its traveling. <P>SOLUTION: The vehicle wheel suspension testing arrangement 1 which rotates wheels, includes: a crawler 10 which has strip-like crawler beams 40 arranged side by side in a circulating direction to form a caterpillar; a crawler support table 11 for circularly supporting the crawler 10; and a crawler driving mechanism 20 for circulating the crawler 10 which touches and rolls the wheels. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle wheel suspension test apparatus for testing wheels, suspensions and the like of a vehicle by rotating wheels.

2. Description of the Related Art Conventionally, there is a vehicle test apparatus that rotates and drives a cylindrical drum that rolls a wheel by a motor, rolls the front and rear wheels of the vehicle to four drums, and vibrates the drums at different rotational speeds. Yes (see Patent Document 1).
Japanese Patent Laid-Open No. 06-294710

  However, in such a conventional vehicle test apparatus, since the ground contact surface of the wheel with respect to the drum is small, the behavior of the vehicle suspension or the like due to vibration or impact input from the drum to the wheel is far from that during driving. There is a problem that the accuracy of the durability test of the vehicle cannot be improved.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a vehicle wheel suspension test apparatus that can make the behavior of a vehicle wheel, suspension, etc. close to each other during traveling.

  The present invention is a vehicle wheel suspension test apparatus for rotating a wheel, a crawler in which strip plate-like crawler beams are aligned in a circulation direction to form an endless track, a crawler support base that supports the crawler in a circulatory manner, And a crawler driving mechanism that circulates a crawler that rolls the wheels.

  According to the present invention, since the crawler forms a flat road surface by the crawler beams aligned in the circulation direction, the ground contact surface shape of the wheel is close to that during travel, and the accuracy of the vehicle durability test and the like can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a front view of a vehicle wheel suspension test apparatus 1 that vibrates while rotating a wheel, and FIG. 2 is a side view of the vehicle wheel suspension test apparatus 1. Here, it is assumed that three axes X, Y, and Z that are orthogonal to each other are set, the X axis extends in a substantially horizontal front-rear direction, the Y axis extends in a substantially horizontal lateral direction, and the Z axis extends in a substantially vertical direction.

  As shown in FIG. 1, the vehicle wheel suspension test apparatus 1 includes an annular crawler 10 that makes rolling contact with a wheel, a crawler support base 11 that supports the crawler 10 so as to be circulated, and a crawler drive mechanism 20 that circulates the crawler 10. And a crawler vibration mechanism 30 that vibrates the crawler support 11.

  As shown in FIG. 2, as the crawler driving mechanism 20, a driving sprocket 12 and a driven sprocket 13 are supported on the crawler support base 11 so as to be rotatable around a Y axis (horizontal axis). The crawler 10 is stretched over the drive sprocket 12 and the driven sprocket 13.

  FIG. 3A is a side view of the crawler 10. The crawler 10 is formed by connecting strip plate-like crawler beams 40 so as to be arranged in an annular shape, and forms an endless track.

  The crawler 10 includes a plurality of chain carriers 41, and the crawler beams 40 are connected to the chain carriers 41 so as to be arranged in an annular shape. Each chain carrier 41 is wound around the drive sprocket 12 and the driven sprocket 13. The crawler 10 forms a flat road surface between the drive sprocket 12 and the driven sprocket 13.

  In the chain carrier 41, both ends of the pieces 45 and 46 are rotatably connected via pins 47, and a roller 48 is rotatably fitted to the pins 47.

  A flange 49 is formed by bending the left and right pieces 45, and the back surface of the crawler beam 40 is coupled to the flange 49.

  The strip-shaped metal crawler beam 40 has a step 55 extending in the Y-axis direction at one end and a recess 56 extending in the Y-axis direction at the other end. The step portions 55 and the concave portions 56 of the adjacent crawler beams 40 are engaged with each other so as to fill the gap between the adjacent crawler beams 40.

  As shown in FIG. 2, a crawler support 11 is provided with a driven shaft 19 that is rotatably supported about the Y axis (horizontal axis). A plurality (three or more) of driven sprockets 13 are provided on the driven shaft 19. Are concatenated.

  On the crawler support 11, a drive shaft 17 that is rotatably supported around the Y axis (horizontal axis) is provided, and a plurality (three or more) of drive sprockets 12 are connected to the drive shaft 17.

  FIG. 4 is a cross-sectional view showing a schematic configuration of the drive sprocket 12 and the crawler 10. As shown, the teeth 15 of the drive sprockets 12 mesh with the rollers 48 of the chain carriers 41 so that the chain carriers 41 are circulated.

  As shown by a two-dot chain line in FIG. 4, a block 61 protruding on the crawler 10 may be provided, and the block 61 may be fastened to the crawler beam 40 via a bolt (not shown). When testing the vehicle, the rolling contact of the wheel with the block 61 that circulates with the crawler beam 40 causes the wheel to roll on the flat road surface created by the crawler beam 40, and the protrusion on the road surface that the wheel creates with the block 61. The state of getting over is repeated. As a result, it is possible to reproduce a traveling state in which the vehicle climbs over a step on the road surface.

  The block 61 may be integrally formed with the crawler beam 40.

  FIG. 3B is a cross-sectional view taken along line AA in FIG. As shown in this figure, a guide rail 18 that is in rolling contact with the roller 48 of the chain carrier 41 is provided. The guide rail 18 is fixed on the crawler support 11 and is disposed along the lower side of the chain carrier 41. The upper part of the chain carrier 41 circulates in the X-axis (horizontal axis) direction along the guide rail 18 by rolling the rollers 48 to the guide rail 18.

  The crawler drive mechanism 20 includes an electric motor 25 that rotationally drives the drive sprocket 12 and a drive shaft 21 that transmits the rotation of the electric motor 25 to the drive sprocket 12.

  The motor that rotationally drives the drive sprocket 12 is not limited to this, and a hydraulic motor or another motor may be used.

  The electric motor 25 is fixed to the gantry 8, and in order to absorb the displacement of the drive sprocket 12 with respect to the electric motor 25, the drive shaft 21 has a telescopic shaft portion 22 that expands and contracts via the spline. One end of the drive shaft 21 is connected to the output shaft of the electric motor 25 via a constant velocity joint 23 so as to be bendable. The other end of the drive shaft 21 is foldably connected to the input shaft of the drive sprocket 12 via a constant velocity joint 24.

  As a result, the rotation of the electric motor 25 can be transmitted to the drive sprocket 12 while the drive shaft 21 changes its posture while the crawler vibration mechanism 30 is vibrating the crawler support 11.

  The crawler vibration mechanism 30 includes six elevating actuators 31 that extend and contract in the Z-axis direction, and six links 35 that transmit the displacement of each elevating actuator 31 to the crawler support base 11. And rotating (rolling, pitching, yawing) about three axes of X, Y, and Z.

  Each lifting / lowering actuator 31 includes a cylinder 32 that is fixed to the gantry 9 so as to extend in the Z-axis direction, and a rod 33 that protrudes slidably from the cylinder 32. The rod 33 is moved up and down by the guided oil pressure.

  Each link 35 is provided between each elevating actuator 31 and the crawler support 11. The lower end of each link 35 is connected to the tip of the rod 33 of each elevating actuator 31 via a universal joint 37. The upper end of each link 35 is connected to the crawler support 11 via a universal joint 36. The link 35 is lightened by using a composite material or the like.

  The crawler oscillating mechanism 30 moves the crawler support 11 up and down and rotates around the X, Y, and Z axes by controlling the expansion and contraction operations of the elevating actuators 31 in cooperation with each other by the hydraulic control devices. It is supposed to let you.

  FIG. 1 is an example in which one vehicle wheel suspension test apparatus 1 is provided alone. During the vehicle test, the front wheels or the rear wheels of the vehicle are arranged so as to make rolling contact with each crawler 10, and the crawler vibration mechanism 30 vibrates each crawler 10 to perform a vibration test.

  However, the present invention is not limited to this, and two vehicle wheel suspension test apparatuses 1 may be provided in parallel, and the two crawlers 10 may be arranged in parallel with each other at a predetermined interval. In this case, the vibration test can be performed by arranging the left and right front wheels or the left and right rear wheels of the four-wheel vehicle so as to be in rolling contact with each crawler 10.

  Further, four vehicle wheel suspension test apparatuses 1 may be provided, and the four crawlers 10 may be arranged with a predetermined interval. In this case, the vibration test can be performed by arranging the left and right front wheels and the left and right rear wheels of the four-wheel vehicle so as to be in rolling contact with the respective crawlers 10 respectively.

  In the present embodiment, the vehicle wheel suspension test apparatus 1 rotates a wheel, and a crawler 10 in which strip-shaped crawler beams 40 are aligned in a circulation direction to form an endless track, and the crawler 10 is supported so as to be circulated. The crawler support 11 to be rotated and the crawler driving mechanism 20 that circulates the crawler 10 that rolls the wheels are provided.

  Based on the above configuration, the crawler 10 forms a flat road surface by the crawler beams 40 arranged in the circulation direction, so that the shape of the ground contact surface of the wheel is close to that during travel, and the accuracy of a vehicle durability test or the like can be improved.

  In the present embodiment, the crawler drive mechanism 20 includes a plurality of drive sprockets 12 and driven sprockets 13 that are rotatably supported, and a plurality of chain carriers 41 that are wound around each drive sprocket 12 and each driven sprocket 13. The crawler 10 is configured such that each crawler beam 40 is connected to a plurality of chain carriers 41.

  Based on the above configuration, the chain carrier 41 smoothly circulates over the drive sprocket 12 and the driven sprocket 13, and the crawler beam 40 arranged in an annular shape can be circulated at high speed by the chain carrier 41.

  In the present embodiment, the chain carrier 41 includes a roller 48 that meshes with the drive sprocket 12 and the driven sprocket 13, a guide rail 18 that is in rolling contact with the roller 48 is provided, and the guide rail 18 is fixed on the crawler support 11. It was.

  Based on the above configuration, the chain carrier 41 circulates while being guided by the guide rail 18, and moves each crawler beam 40 along the guide rail 18. When the guide rail 18 extends in a straight line, a flat road surface is formed by the crawler beam 40, and the shape of the ground contact surface of the wheel is close to that during travel, thereby improving the accuracy of a vehicle durability test or the like.

  In the present embodiment, the block 61 protruding on the crawler 10 is provided.

  Based on the above configuration, when the vehicle is tested, the wheel is brought into contact with the block 61 circulating with the crawler beam 40, so that the wheel is brought into contact with a flat road surface created by the crawler beam 40, and the wheel is made by the block 61. The state of overcoming the protrusion on the road surface is repeated. As a result, it is possible to reproduce a traveling state in which the vehicle climbs over a step on the road surface.

  In the present embodiment, the crawler support mechanism 11 that vibrates the crawler support 11 is provided.

  Based on the above configuration, the crawler 10 is vibrated, and vibrations and impacts input from the crawler 10 to the wheels are applied, so that it becomes possible to perform a vehicle durability test and the like under various conditions.

  In the present embodiment, the crawler vibration mechanism 30 includes six lifting actuators 31 that extend and contract in a substantially vertical direction (Z-axis direction), and six links that transmit the displacement of each lifting actuator 31 to the crawler support base 11. 35, and the crawler support 11 is moved up and down and rotated about three axes orthogonal to each other.

  Based on the above configuration, the crawler 10 is subjected to vibrations and impacts with 6 degrees of freedom on the wheels, and the behavior of the vehicle suspension and the like becomes close to that during traveling, and the accuracy of the vehicle durability test and the like can be improved.

  Since each link 35 transmits the displacement of each elevating actuator 31 to the crawler support 11, the crawler vibration mechanism 30 is made compact, so that it corresponds to the tread of the vehicle (the distance between the left and right wheels). Two crawlers 10 can be arranged. As a result, vibrations and impacts are applied to the left and right wheels of the wheels while simultaneously rotating them, and the behavior of the vehicle suspension and the like is close to that during driving, thereby improving the accuracy of the vehicle durability test and the like.

  In the present embodiment, the crawler drive mechanism 20 includes a motor 25 that rotationally drives the drive sprocket 12, and a drive shaft 21 that transmits the rotation of the motor 25 to the drive sprocket 12. The drive shaft 21 expands and contracts in the axial direction. The telescopic shaft portion 22 is provided, one end of the drive shaft 21 is connected to the output shaft of the motor 25 via a constant velocity joint 23 so as to be bendable, and the other end of the drive shaft 21 is connected to the drive sprocket 12 via a constant velocity joint 24. The input shaft is connected to be bent.

  Based on the above configuration, the drive shaft 21 transmits the rotation of the motor 25 to the drive sprocket 12 while changing the posture of the crawler support base 11 while the crawler excitation mechanism 30 is vibrating the crawler support 11. By providing the motor 25 fixed to the gantry 9, the weight of the crawler support 11 is reduced, and the moving speed of the crawler support 11 can be increased.

  As another embodiment, as shown in FIG. 5, a plurality of comb-like convex portions 51 protruding in the X-axis direction are formed at one end of the crawler beam 40 so as to be arranged in the Y-axis direction at a predetermined interval. Slits (notches) 52 are formed at the other end of 40 so as to be aligned in the Y-axis direction at a predetermined interval. Comb-like convex portions 51 and slits 52 of adjacent crawler beams 40 are engaged with each other to fill a gap between adjacent crawler beams 40.

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

1 is a front view of a vehicle wheel suspension test apparatus showing an embodiment of the present invention. The side view of a vehicle wheel suspension test device similarly. The side view and sectional drawing of a crawler similarly. Sectional drawing of a chain carrier etc. similarly. The top view of the crawler which shows other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle wheel suspension test apparatus 10 Crawler 11 Crawler support stand 12 Drive sprocket 13 Drive sprocket 17 Drive shaft 18 Guide rail 19 Drive shaft 20 Crawler drive mechanism 30 Crawler vibration mechanism 31 Lifting actuator 35 Link 40 Crawler beam 41 Chain carrier 48 Roller 61 block

Claims (5)

A vehicle wheel suspension test device for rotating a wheel,
A crawler in which strip-shaped crawler beams are aligned in the circulation direction to form an endless track,
A crawler support for supporting the crawler in a circulating manner,
A vehicle wheel suspension test apparatus, comprising: a crawler drive mechanism for circulating the crawler for rolling contact with the wheel. The crawler driving mechanism is
A plurality of driven and driven sprockets rotatably supported; and
A plurality of chain carriers hung around each driving sprocket and each driven sprocket,
The vehicle wheel suspension test apparatus according to claim 1, wherein each of the crawler beams is connected across the plurality of chain carriers. The chain carrier includes a roller that meshes with the drive sprocket and the driven sprocket,
A guide rail that rolls in contact with this roller is provided,
The vehicle wheel suspension test apparatus according to claim 2, wherein the guide rail is fixed on the crawler support.   4. The vehicle wheel suspension testing apparatus according to claim 1, further comprising a crawler vibration mechanism that vibrates the crawler support base. 5.   The vehicle wheel suspension testing device according to claim 1, further comprising a block protruding on the crawler.

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