JP2017096874A - Vehicle body floating device, and vehicle body rigidity testing device equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body floating device that can simulate floating of a vehicle body to conduct various tests on the body of a motor vehicle or the like and thereby obtain test results (consecutive data on load and coordinates), and a vehicle body rigidity testing device equipped with the vehicle body floating device.SOLUTION: A vehicle body floating device, a plurality of which are to be installed under prescribed positions of the body bottom to simulate floating of the body for use in various tests on the body, is equipped with a body-carried part, a horizontally movable part that makes the body-carried part movable in the X and Y directions in an XYZ three-dimensional coordinate system, a perpendicularly movable part that makes the body-carried part movable in the Z direction, and a load measuring part that can measure body loads in the prescribed positions.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle body floating device that artificially floats a vehicle body to perform various tests on the vehicle body such as an automobile.

  2. Description of the Related Art Conventionally, in automobile development sites and the like, various tests using not only computer simulations but also actual vehicle bodies have been performed in order to confirm whether the vehicle body rigidity meets the specifications as designed.

  A lightweight vehicle body that is not equipped with driving parts such as an engine, electrical components, in-car parts, and other parts is called a white body, and is composed of a frame body that forms the skeleton of an automobile. If the white body does not have sufficient rigidity, safety as an automobile will not be satisfied when it is put on the market. For this reason, it is very important to conduct a vehicle body rigidity test not only on the finished car but also on the white body from the initial stage of development.

  Therefore, for example, Patent Document 1 discloses a method of measuring rigidity with respect to a finished automobile body. The rigidity measuring device used in such a measuring method is a hub or shock mounted on the wheels, except for one of the left and right front wheels, so that the vehicle body is horizontal on the correction machine serving as a surface plate. A hub fixture or a reference point support is connected to a suspension tower (suspension support) to which the absorber is mounted, and is fixed to the correction machine.

  Further, a load applying device is connected to the hub or the suspension tower on one of the left and right wheels to which the hub fixture or the like is not connected, and is fixed to the correction machine. Then, the extension part is extended in the Z direction until the load sensor of the load applying device indicates a predetermined load, the vehicle body is twisted, and the displacement of the suspension tower or the like is measured to measure the rigidity of the vehicle body. It is configured as follows.

JP 2006-292737 A

  The technique described in Patent Document 1 is excellent in that it can be applied not only to a finished automobile body but also to a white body.

  However, in order to adjust the vehicle body horizontally on the corrector, a jack must be installed at each of the four jack-up points connected to the rocker panel at the bottom of the vehicle body, and multiple persons must perform adjustment work for a long time. It was very complicated and inefficient work.

  In addition, since the vehicle body is supported by the correction machine at three locations except for one of the left and right front wheels, the displacement of the supported three locations is not limited even if a load in the Z direction is applied to one of the left and right front wheels. Since the amount could not be obtained, the torsional rigidity of the entire vehicle body could not be precisely measured.

  In addition, even when a load is applied while the vehicle body is supported by the correction machine, precise measurement / evaluation / analysis cannot be performed because measurement cannot be performed in three dimensions at each measurement location XYZ.

  The present invention has been made in view of the circumstances as described above, and in order to perform various tests on a vehicle body such as an automobile, the vehicle body can be artificially floated, and test results for the entire vehicle body ( It is an object of the present invention to provide a vehicle body floating device that can obtain load and coordinate continuous data), and a vehicle body stiffness test apparatus including the vehicle body floating device.

  In order to achieve the above object, the present invention provides the following.

  According to the first aspect of the present invention, there is provided a vehicle body floating device in which a plurality of vehicles are installed at predetermined positions on the bottom of the vehicle body to artificially float the vehicle body in order to perform various tests on the vehicle body. Measure the vehicle body load at the predetermined location, a horizontal movable unit that allows the mounting unit to move in the X and Y directions at least in the XYZ three-dimensional coordinate system, a vertical movable unit that allows the vehicle body mounting unit to move in the Z direction, and A vehicle body floating device characterized by comprising a load measuring unit capable of being provided.

  In the invention according to claim 2, the horizontal movable part includes a horizontal displacement measuring part capable of measuring a displacement amount in the X and Y directions, and the vertical movable part is capable of measuring a displacement amount in the Z direction. The vehicle body floating device according to claim 1, wherein the vehicle body floating device is provided.

  The invention according to claim 3 is characterized in that the horizontal movable portion is movable in the X and Y directions by a linear guide, and the vertical movable portion is movable in the Z direction by an electric cylinder. Or suppose that the vehicle body floating apparatus of 2 is provided.

  In the invention according to claim 4, the vehicle body floating device includes an automatic computer and is connected to the automatic computer, and the automatic computer includes a plurality of the vehicle body floating devices when no forced load is applied to the vehicle body. 2. The configuration is such that each vertical movable portion of the plurality of vehicle body floating devices is automatically controlled so that each portion of the bottom portion of the vehicle body to be placed is located on the same plane and on a horizontal plane. The vehicle body floating device according to any one of items 1 to 3 is provided.

  The invention according to claim 5 includes the vehicle body floating device according to claim 4, and a load generator that applies a load in the Z direction to the vehicle body, the load generator being connectable to the vehicle body. The vehicle body connecting portion, a load measuring portion capable of measuring a load as a load, a vertical load biasing portion movable in the Z direction, and a vertical load displacement measuring portion capable of measuring a displacement amount in the Z direction, The automatic computer is also connected to the load generator, and automatically applies a predetermined amount of load to the vehicle body by the load generator, and the torsion of the vehicle body caused by the load places the vehicle body. The position of the vehicle body placement portion in the Z direction is automatically controlled by the vertical movable portion so that the load measured by the load measurement portion of the vehicle body floating device is canceled as a whole. Body rigidity test To provide cents a unit.

  According to the first aspect of the present invention, the vehicle body floating device is a vehicle body floating device that is installed in a plurality of predetermined positions on the bottom of the vehicle body to artificially float the vehicle body in order to perform various tests on the vehicle body. A horizontal movable portion that allows the vehicle body placement portion to be movable in at least the X and Y directions in an XYZ three-dimensional coordinate system, a vertical movable portion that allows the vehicle body placement portion to be movable in the Z direction, and By providing a load measuring unit capable of measuring the vehicle body load, the vehicle body can be placed via a plurality of vehicle body floating devices, and the height and inclination of the vehicle body can be arbitrarily controlled. Since the height of each vehicle body floating device can be controlled according to the vehicle body load received by the vehicle body, the vehicle body can be artificially floated.

  According to the second aspect of the present invention, the horizontal movable unit includes a horizontal displacement measuring unit capable of measuring the amount of displacement in the X and Y directions, and the vertical movable unit is capable of measuring the amount of displacement in the Z direction. Since the displacement of each vehicle body mounting portion on which each vehicle body floating device is located can be obtained in various tests on the vehicle body, for example, the torsion amount of the vehicle body in the vehicle body rigidity test is a specific numerical value. Can be calculated with high accuracy.

  According to the third aspect of the invention, the horizontal movable portion is movable in the X and Y directions by the linear guide, and the vertical movable portion is movable in the Z direction by the electric cylinder or the like. In the X and Y directions where the amount of displacement is small in the test, it can be constructed at low cost by using a linear guide. In addition, the Z-direction which supports the vehicle body substantially and is both gravitational and has a large amount of displacement is optimized by an electric cylinder. Therefore, the test accuracy can be improved.

  According to the fourth aspect of the present invention, the vehicle body floating device includes the automatic computer and is connected to the automatic computer, and the automatic computer mounts the plurality of vehicle body floating devices when no forced load is applied to the vehicle body. By automatically controlling each vertical movable part of multiple body floating devices so that each part of the bottom of the body is on the same plane and is in a horizontal plane, the body can be put in a short time before various tests on the body. Therefore, the workability of various tests can be greatly improved.

  According to a fifth aspect of the present invention, the vehicle body floating device according to the fourth aspect of the present invention and a load generator that applies a load in the Z direction to the vehicle body, the load generator is connected to the vehicle body. A load measuring unit capable of measuring a load as a load, a vertical load urging unit movable in the Z direction, and a vertical load displacement measuring unit capable of measuring a displacement amount in the Z direction. Is also connected to a load generator, and the load generator automatically applies a predetermined amount of load to the vehicle body. Further, the torsion of the vehicle body caused by the load is measured by the load measuring unit of the vehicle body floating device on which the vehicle body is placed. The vertical moving part automatically controls the position of the vehicle body mounting part in the Z direction so that the applied load is canceled out as a whole. To counter this The Ku twisted state as it can be revealing.

It is explanatory drawing which mounted the vehicle body in the vehicle body floating apparatus which concerns on this embodiment. It is a perspective view of the body floating device concerning this embodiment. It is a simple perspective exploded view of the upper part side of the body floating device concerning this embodiment. It is a front view of the body floating device concerning this embodiment. (A) is a top view of the X direction movable part of a horizontal movable part, (b) is a top view of a Y direction movable part. (A) is sectional drawing which shows the neutral state of a X direction movable part, (b) is sectional drawing which shows the state which the slider displaced to the right direction. It is explanatory drawing which mounted the vehicle body in the vehicle body floating apparatus which connected the automatic computer. It is explanatory drawing which added the load generator to FIG. 1, and was set as the vehicle body rigidity test apparatus. It is a perspective view of the load generator concerning this embodiment. It is a front view of the load generator concerning this embodiment. It is explanatory drawing which connected the load generator to the suspension tower of the vehicle body. It is explanatory drawing of the vehicle body rigidity test apparatus which connected the automatic computer.

  The gist of a vehicle body floating device according to an embodiment of the present invention is a vehicle body floating device that is installed in a plurality of predetermined locations on the bottom of a vehicle body to artificially float the vehicle body in order to perform various tests on the vehicle body. A horizontal movable portion that allows the vehicle body placement portion to be movable in the X and Y directions at least in the XYZ three-dimensional coordinate system, a vertical movable portion that allows the vehicle body placement portion to be movable in the Z direction, and a vehicle body at a predetermined location. And a load measuring unit capable of measuring the load. In other words, a vehicle body floating device that can artificially float a vehicle body to perform various tests on a vehicle body such as an automobile and obtain test results (continuous data of load and coordinates) for the entire vehicle body. The present invention intends to provide a vehicle body rigidity test apparatus including a vehicle body floating device.

  Hereinafter, a vehicle body floating device according to the present invention and a vehicle body rigidity test apparatus including the vehicle body floating device will be described with reference to the drawings. In this description, the same or symmetrical structures and parts are assigned the same reference numerals in principle, and only one of the left and right is described, and the description of the other is omitted as appropriate.

  In the XYZ three-dimensional coordinate system in this description, the X direction and the Y direction mean directions that are orthogonal to each other in the same plane that is a substantially horizontal direction, and the Z direction is orthogonal to the XY plane. Means direction.

[Embodiment of body floating device]
First, as shown in FIGS. 1 to 4, the vehicle body floating device 1 according to the embodiment of the present invention is installed in a plurality at predetermined locations on the vehicle body bottom portion f in order to perform various tests on the vehicle body C. The vehicle body placing portion 2, the horizontal movable portion 10 that makes the vehicle body placing portion 2 movable in the X and Y directions at least in the XYZ three-dimensional coordinate system, and the vehicle body placing portion 2 include: A vertically movable portion 50 that is movable in the Z direction and a load measuring portion 60 that can measure a vehicle body load at a predetermined location are provided.

  Further, the horizontal movable unit 10 includes a horizontal displacement measuring unit 11 that can measure the amount of displacement in the X and Y directions, and the vertical movable unit 50 includes a vertical displacement measuring unit 51 that can measure the amount of displacement in the Z direction. Yes.

  Further, the horizontal movable unit 10 is movable in the X and Y directions by the linear guides 19 and 19y, and the vertical movable unit 50 is movable in the Z direction by the electric cylinder 52.

  By configuring the vehicle body floating device 1 in this manner, the vehicle body C can be moved at an arbitrary angle while the vehicle body C is held by the plurality of vehicle body floating devices 1, and in addition, according to the load measured by each load measuring unit 60. Since the height in the Z direction of each vehicle body floating device 1 can be varied, Z is adjusted so as to cancel out the increased or decreased load as a whole while detecting distortion generated in the vehicle body C as a load change when a load is applied to the vehicle body C. The twist of the vehicle body C can be revealed by changing the height of the direction.

  Furthermore, since the torsion of the vehicle body C in the X, Y, and Z directions that has appeared can be obtained by the horizontal displacement measuring unit 11 and the vertical displacement measuring unit 51, the behavior of the vehicle body C in various tests is accurately calculated as a numerical value. It becomes possible to do.

  That is, in the vehicle body floating device 1 according to the embodiment of the present invention, the vehicle body C can be artificially floated and can be widely used for various tests on the vehicle body C.

  Hereinafter, a specific configuration of each part will be described in detail with reference to the drawings.

  As shown in FIGS. 2 to 4, the vehicle body floating device 1 according to the present embodiment includes a vehicle body mounting portion 2 disposed at an upper portion thereof, and a horizontal movable portion 10 provided continuously with the vehicle body mounting portion 2 below the vehicle body mounting portion 2. In addition, a vertical movable portion 50 connected to the horizontal movable portion 10 is disposed below the vertical movable portion 50 to integrally form them.

  That is, the vehicle body placing portion 2 and the horizontal movable portion 10 are formed so as to be movable up and down by the vertical movable portion 50. In the present embodiment, such an arrangement is used, but the present invention is not limited to this. For example, the horizontal movable unit 10 is disposed below the vertical movable unit 50, and the like within the scope of the gist of the present invention. Various modifications and changes can be made.

  Further, as shown in FIG. 3, the vehicle body floating device 1 according to the present embodiment has the centers g <b> 1, g <b> 2, g <b> 3 of the vehicle body mounting unit 2 and the horizontal movable unit 10 on the axis 58 of the piston rod 53 of the vertical movable unit 50. Is configured to be located.

  The vehicle body mounting portion 2 is formed in a rectangular block shape having rocker insertion grooves 4 formed at the upper ends thereof and formed with substantially V-shaped grooves in cross-sectional view at both ends and the upper opening. Thus, by forming the rocker insertion groove 4 in a substantially V shape in cross section, a plate-like rocker (not shown) suspended from the vehicle body bottom f is guided, and the rocker is inserted into the rocker insertion groove 4. Becomes easy. Further, the depth of the rocker insertion groove 4 is formed such that the lower end of the rocker does not reach the bottom 5 of the rocker insertion groove 4. Accordingly, it is the upper surface 6 of the vehicle body mounting portion 2 that is open on the upper side of the rocker insertion groove 4 that supports the vehicle body C in contact with the vehicle body bottom portion f.

  The material of the vehicle body mounting portion 2 is made of a hard rubber material or the like so as to improve the adhesion with the vehicle body bottom portion f and not slip on the upper surface 6 of the vehicle body mounting portion 2 when a load is applied to the vehicle body C. A flexible material is used.

  Moreover, the vehicle body mounting part 2 is connected to a rectangular plate-shaped first connection plate 8 for connection to the horizontal movable part 10 via bolts. The vehicle body placing portion 2 is fixed to the central portion of the upper surface of the first connecting plate 8.

  The first connecting plate 8 connects the vehicle body placing portion 2 and the horizontal movable portion 10, and directly connects the vehicle body placing portion 2 to the horizontal movable portion 10 without using the first connecting plate 8. May be.

  The horizontal movable part 10 is composed of an X-direction movable part 17 disposed in the upper part and a Y-direction movable part 43 disposed in the lower part, and each of the movable parts 17 and 43 is provided by linear guides 19 and 19y. Slide in the direction.

  The linear guides 19 and 19y are composed of rails 20 and 20y and sliders 21 and 21y movable on the rails 20 and 20y, and roll inside the sliders 21 and 21y while being in contact with the rails 20 and 20y. A plurality of ball bearings are provided.

  Further, the horizontal movable unit 10 is configured such that the vehicle body mounting unit 2 always returns to a fixed position in a no-load state. In the present embodiment, this is realized by a biasing force of a spring.

  As shown in FIGS. 3, 5 (a), and 6 (a), the X-direction movable portion 17 urges the linear guide portion 18, the connecting stay portion 28, and the bias on the rectangular plate-like second connecting plate 41. It consists of the part 31. The linear guide portion 18 includes a pair of linear guides 19 and 19 arranged in parallel to each other and a connecting guide 24 that connects the sliders 21 and 21 of the linear guides 19 and 19 to each other. The connecting stay portion 28 includes a pair of connecting stays 29 and 29 each having a substantially rectangular plate shape facing each other in the sliding direction of the slider 21. The urging portion 31 includes a pair of guide shafts 32 and 32 and a pair of compression springs 36 and 36.

  Specifically, the X-direction movable portion 17 is formed in a rectangular frame shape in plan view by connecting a pair of linear guides 19 and 19 and a pair of connecting stays 29 and 29 to each other and connecting the end portions to each other. A connecting guide 24 having an H shape in plan view is interposed between the inner walls 22 of the sliders 21 and 21. The connection guide 24 is formed with attachment plates 25 and 25 at both end portions, and a centering plate 26 orthogonal to the attachment plate 25 is formed between the central portions of the attachment plates 25 and 25.

  Further, the two sliders 21 and 21 integrated by the connection guide 24 are connected to the first connection plate 8 provided on the upper part thereof by bolts.

  A guide shaft insertion hole 27 is provided in the center portion of the centering plate 26 in the guide direction of the linear guide 19. The guide shaft insertion hole 27 is formed so that the guide shaft 32 can be inserted with an inner diameter larger than the outer diameter of the guide shaft 32. In addition, the guide shaft 32 is provided on the inner peripheral wall 30 of the connecting stay 29 so as to be parallel to the linear guide 19 so that the shaft tip 33 of the guide shaft 32 faces the guide shaft insertion hole 27.

  That is, the pair of guide shafts 32, 32 are closely opposed to each other in the rectangular frame formed by the linear guides 19, 19 and the connecting stays 29, 29, and the shaft tip 33 is the guide shaft insertion hole 27. The two are opposed to each other in a state of being inserted into the inside from both openings.

  The rear end portion 35 of the guide shaft 32 has a plate-like flange 34 orthogonal to the guide shaft 32, and is connected to the connecting stay 29 via the flange 34. Further, a compression spring 36 and a disk-shaped spring stopper 37 are inserted into the guide shaft 32, and a nut 39 is screwed to a female screw (not shown) screwed to the shaft tip 33, whereby the flange 34 and the spring stopper 37 are connected. A compression spring 36 is attached in a biased state.

  The outer diameter of the spring stopper 37 is larger than the outer diameter of the compression spring 36 and the inner diameter of the guide shaft insertion hole 27. The compression spring 36 is stable between the flange 34 and the spring stopper 37, and the connection guide 24. Can be moved against the urging force of the compression spring 36.

  In this way, the urging portion 31 arranged so as to oppose the guide shaft 32 having the compression spring 36 has a urging force with which the spring stopper 37 holds the centering plate 26, that is, a connecting guide at a substantially central portion of the horizontal movable portion 10. Thus, the vehicle body placing portion 2 connected to the slider 21 connected to 24 is positioned at the center g2 of the X-direction movable portion 17, and the vehicle body placing portion 2 is placed at a fixed position (unless another load is applied to the connection guide 24). Can remain in the center g2).

  Further, as shown in FIG. 6B, the load in the X direction of the vehicle body placing portion 2 is displaced in the X direction, and one side surface of the centering plate 26 is connected to one compression spring via one spring stopper 37. 36 is displaced while being compressed.

  As described above, the mechanism that can return the vehicle body placing portion 2 to the fixed position is not limited to the spring, and is not limited to the linear guide. For example, the upper and lower plates can be moved in the X direction and the Y direction. A plurality of ball bearings may be arranged between them, or an electric cylinder or the like may be used to exhibit the same function.

  In the case where an electric cylinder is used instead of the linear guide, pulse control can be performed by an encoder integrated with the electric cylinder, so that position control is possible. In addition, load control is also possible by adding a load cell to the electric cylinder.

  As shown in FIGS. 2 and 3, the amount of displacement in the X direction can be measured by a reflective laser sensor 11, which is a precision displacement meter, as the horizontal displacement measuring unit 11. Specifically, a laser sensor is formed in which one connecting stay 29 is extended to form an extension piece 12, and the outer surface 23 of the slider 21 on the extension piece 12 side can be irradiated toward the inner measurement surface 13 of the extension piece 12. 11 is stuck. The sensor wiring 14 for transmitting input / output signals and the like of the laser sensor 11 is connected to the computer 70.

  The laser sensor 11 configured as described above irradiates the irradiation light X toward the inner measurement surface 13 of the extension piece 12 and receives the reflected light W as shown in FIG. The distance (displacement amount) in the X direction can be measured by measuring and converting. Therefore, as shown in FIG. 6B, when the X direction movable part 17 moves to the right side, the X direction movable part 17 is received by receiving the irradiation light X ′ irradiated from the laser sensor 11 as the reflected light W ′. Can be measured.

  In the present embodiment, the horizontal displacement measuring unit 11 is configured by a laser sensor, but the present invention is not limited to this, and a contact-type sensor using an encoder that is a precision displacement meter and other types of measuring devices. Alternatively, a measure may be attached to measure the amount of displacement visually. The horizontal displacement measuring unit 11 can similarly adopt various methods in measuring the displacement amount in the Y direction, which will be described later.

  The X-direction movable part 17 configured as described above is connected to the second connection plate 41 having a rectangular plate shape for connection to the Y-direction movable part 43 via a bolt.

  The second connection plate 41 connects the X-direction movable portion 17 and the Y-direction movable portion 43, and the X-direction movable portion 17 is directly connected to the Y-direction movable portion 43 without the second connection plate 41. You may connect. Further, the upper and lower arrangements of the X-direction movable portion 17 and the Y-direction movable portion 43 may be reversed.

  As shown in FIG. 5B, the Y-direction movable portion 43 has the same configuration as that of the X-direction movable portion 17, and the traveling direction (guide direction) of the linear guide 19 with respect to the same direction in the X-direction movable portion 17. The description is omitted because it is shifted at right angles in the XY plane, but the reference numerals in the figure are identified by adding “y” after the reference numerals of the respective parts of the X-direction movable part 17.

  Accordingly, even in the displacement amount in the Y direction, as shown in FIGS. 2 and 3, the horizontal displacement measuring unit 11y can be measured by the reflective laser sensor 11y and extended to the outer surface 23y of the slider 21y on the extension piece 12y side. A laser sensor 11y that can be irradiated toward the inner measurement surface 13y of the piece 12y is attached. In addition, the sensor wiring 14 y that transmits the input / output signals of the laser sensor 11 is connected to the computer 70.

  As shown in FIGS. 3 and 4, the Y-direction movable portion 43 is connected to the vertical movable portion 50 via a rectangular plate-shaped third connection plate 45. The third connecting plate 45 is connected to the Y-direction movable portion 43 on the upper surface by a bolt, and is connected to the vertical movable portion 50 on the lower surface by a bolt.

  The vertical movable unit 50 includes an electric cylinder 52 including a vertical displacement measuring unit 51 that is movable in the Z direction and can measure the amount of displacement in the Z direction.

  The electric cylinder 52 is formed in a substantially J shape, and includes a piston rod 53 that is moved up and down by a ball screw (56) in a long portion in the vertical direction, and an axial direction as a vertical direction in a short portion in the vertical direction. The servo motor (54) is disposed, and the ball screw (56) and the servo motor (54) are linked together in a lower case through a timing belt (55). That is, the electric cylinder 52 is a so-called servo cylinder in which the power of the servo motor (54) is transmitted to the ball screw (56) via the timing belt (55), and the piston rod 53 moves up and down by the rotational movement of the ball screw (56). It is composed.

  Since the servo motor (54) has an encoder built-in, the protrusion amount (displacement amount) of the piston rod 53 can be freely input / output as the displacement amount in the Z direction. .

  Further, in the vertical movable unit 50 according to the present embodiment, a cylindrical load cell 61 as a load measuring unit 60 is attached to the tip of the piston rod 53. A male screw is threaded on the load button 62 projecting upward, which forms the force of the load cell 61, and is screwed and fixed to the third connecting plate 45.

  Therefore, the load cell 61 uses the total weight of the vehicle body placing part 2 and the horizontal movable part 10 positioned above the vertical movable part 50, and the first, second, and third connecting plates 8, 41, 45 as an initial value. An increase or decrease from the initial value can be obtained as a vertical load (load).

  Further, as shown in FIG. 2, a rectangular base plate-like floating base 64 for mounting and fixing the vertical movable unit 50 on the surface plate J is provided at the bottom of the vehicle body floating device 1. At the four corners of the floating base 64, there are formed platen fixing holes 65 which are drilled in a triangular shape in plan view as bolt insertion holes having countersinks and communicate with each other at the center.

  As described above, the vehicle body floating device 1 according to the present embodiment is configured. Therefore, for example, as shown in FIG. 1, if the vehicle body floating device 1 is arranged on four places of the vehicle body bottom f which is a jack-up point on the surface plate J, various tests on the vehicle body C can be performed.

  That is, the vehicle body floating device 1 includes a vehicle body placement unit 2, a horizontal movable unit 10 that allows the vehicle body placement unit 2 to be movable in the X and Y directions at least in the XYZ three-dimensional coordinate system, and the vehicle body placement unit 2 in the Z direction. The vehicle body C can be placed via the plurality of vehicle body floating devices 1, and the vehicle body C can be placed via the plurality of vehicle body floating devices 1. The height and inclination of the vehicle body C can be arbitrarily controlled, and the height of each vehicle body floating device 1 can be controlled in accordance with the vehicle body load received by each vehicle body floating device 1, so that the vehicle body C is pseudo-synchronized in a bilaterally symmetric direction. Can be twisted and floated.

  The horizontal movable unit 10 includes a horizontal displacement measuring unit 11 that can measure the amount of displacement in the X and Y directions, and the vertical movable unit 50 includes a vertical displacement measuring unit 51 that can measure the amount of displacement in the Z direction. Thus, the displacement of each vehicle body placement portion 2 where each vehicle body floating device 1 is located can be obtained in various tests on the vehicle body C. For example, the amount of twist of the vehicle body C in the vehicle body rigidity test is expressed by a specific numerical value. Can be calculated with high accuracy.

  Further, the horizontal movable portion 10 is movable in the X and Y directions by the linear guides 19 and 19y, and the vertical movable portion 50 is movable in the Z direction by the electric cylinder 52. The X and Y directions with a small amount can be configured at low cost by using the linear guides 19 and 19y, and the electric cylinder 52 is optimal for the Z direction that substantially supports the vehicle body C and is also in the gravitational direction and has a large amount of displacement. It is possible to move to a certain height with high accuracy, and the test accuracy can be improved.

  In this way, in order to actually control the height and inclination of the vehicle body C to allow the vehicle body C to float in a pseudo manner, as shown in FIG. It is necessary to connect to a certain computer 70 so that input and output are possible. The vehicle body floating system is configured by the vehicle body floating device 1 and the computer 70 connected to the device body of the vehicle body floating device 1.

  In the computer 70, the laser sensors 11 and 11 y forming the horizontal displacement measuring unit 11 of the vehicle body floating device 1, the vertical movable unit 50, the electric cylinder 52 forming the vertical displacement measuring unit 51, and the load cell 61 forming the load measuring unit 60. Are connected by sensor wires 14, 14y and wires 71-74. With such a configuration, acquisition of position data of the horizontal movable part 10, position control and lifting operation of the piston rod 53 of the electric cylinder 52, acquisition of load data at each location of the vehicle body bottom f, feedback to the electric cylinder 52, etc. And various controls can be performed.

  As described above, the vehicle body floating device 1 includes the computer 70 and is connected to the computer 70. When a forcible load is not applied to the vehicle body C, the vehicle body bottom portion f on which the plurality of vehicle body floating devices 1 are placed. The vertical movable parts 50 of the plurality of vehicle body floating devices 1 are automatically controlled so that each of these parts is located on the same plane and on a horizontal plane. That is, in a state where no external load is applied to the vehicle body C, the computer 70 has the same Z-direction position of each support position of the vehicle body C by the vehicle body floating device 1 arranged at four locations with respect to the vehicle body C. Each vertical movable part 50 is controlled so as to be in the position. With such a configuration, since the vehicle body C can be easily set in a horizontal state in a short time before various tests on the vehicle body C, the workability of various tests can be greatly improved.

  Next, the configuration of the vehicle body stiffness test apparatus 80 including the vehicle body floating device 1 described above will be described.

[Car body stiffness testing equipment]
As shown in FIGS. 8 to 12, the vehicle body rigidity test apparatus 80 according to the present embodiment includes the vehicle body floating device 1 described above and a load generator 81 that applies a load in the Z direction to the vehicle body C. The machine 81 measures a displacement amount in the Z direction, a vehicle body connection portion 82 that can be connected to the vehicle body C, a load measurement portion 92 that can measure a load as a load, a vertical load biasing portion 96 that is movable in the Z direction, and The computer 70 is connected to the vehicle body floating device 1 and the load generator 81 via wirings 71 to 74, 110, and a predetermined amount is applied to the vehicle body C by the load generator 81. In addition, the torsion of the vehicle body C caused by the load is vertically movable so that the load measured by the load measuring unit 60 of the vehicle body floating device 1 on which the vehicle body C is placed is offset as a whole. Part 50 More Z-direction position of the vehicle body mounting portion 2 is configured to be automatically controlled.

  As shown in FIGS. 9 and 10, the vehicle body connection portion 82 of the load generator 81 is configured by a plate-like connection reference plate 83 having a substantially equilateral triangle shape with chamfered corners, three bolts 84, and a nut 85. doing. The connection reference plate 83 has bolt insertion holes 86 penetrating in the vicinity of the corners of a substantially equilateral triangle shape, and a pressing rod mounting for projecting a male screw portion (not shown) at the tip of the pressing rod 89 at the center. A hole 87 is provided therethrough.

  As shown in FIG. 11, the connection reference plate 83 is connected to the suspension tower (suspension support portion) S of the vehicle body C to which the upper end portion of the suspension is connected from the lower side. The bolt insertion hole 86 drilled in the connection reference plate 83 is formed so as to communicate with the three suspension mounting holes h drilled in the periphery of the circular opening Sh of the suspension tower S. 84 and a nut 85 are screwed and fixed.

  Below the vehicle body connecting portion 82, there is disposed a round bar-shaped pressing rod 89 in which a male screw is screwed into the front end portion (upper end portion) and a female screw hole is formed in the rear end portion (lower end portion). The male screw portion at the tip of the vehicle body connection portion 82 is inserted through a pressing rod mounting hole 87 formed in the vehicle body connection portion 82 from below, and is screwed and fixed to the vehicle body connection portion 82 by a nut 90.

  A columnar load cell 93 as a load measuring unit 92 is continuously provided below the pressing rod 89. A male screw is threaded on the load button 94 projecting upward, which forms the force point of the load cell 93, and is screwed into a female screw hole formed at the rear end of the pressing rod 89 so as to be integrated with the pressing rod 89. Become.

  Therefore, the load cell 93 can obtain the increase / decrease from the initial value as the vertical load (load) with the total weight of the vehicle body connection portion 82 and the pressing rod 89 positioned above as the initial value.

  Further, the load cell 93 is connected to the vertical load urging portion 96 at the lower bottom portion with a bolt.

  The vertical load urging unit 96 includes an electric cylinder 52 that includes a vertical load displacement measuring unit 97 that is movable in the Z direction and that can measure the amount of displacement in the Z direction.

  The electric cylinder 52 is formed in a substantially J shape, and includes a piston rod 99 that is moved up and down by a ball screw (102) in a long portion in the vertical direction, and an axial direction as a vertical direction in a short portion in the vertical direction. The servo motor (100) is disposed, and the ball screw (102) and the servo motor (100) are linked and connected via a timing belt (101) in the lower case. That is, the electric cylinder 52 transmits a power of the servo motor (100) to the ball screw (102) via the timing belt (101), and a so-called servo cylinder in which the piston rod 99 moves up and down by the rotational movement of the ball screw (102). It is composed. The piston rod 99 of the electric cylinder 52 is coaxially arranged with the pressing rod 89 via the load cell 93.

  Since the servo motor (100) has an encoder built-in, the protrusion amount (displacement amount) of the piston rod 99 can be freely input / output as a displacement amount in the Z direction. Yes.

  In addition, a rectangular plate-shaped load base 104 for mounting and fixing the load generator 81 on the surface plate J is provided at the lower bottom portion of the load generator 81 as shown in FIG. At the four corners of the loading base 104, bolt insertion holes having countersinks are formed in a triangular shape in plan view, and a platen fixing hole 105 communicating at the center is formed.

  As described above, the load generator 81 of the vehicle body stiffness test apparatus 80 according to the present embodiment is configured. Therefore, for example, as shown in FIGS. 8 and 12, the vehicle body floating device 1 is arranged at four locations on the base plate J at the vehicle body bottom f, which is a jack-up point, and a load is generated in one suspension tower S on the front wheel side. If the machine 81 is installed, it is possible to perform a vehicle body rigidity test by applying a load to the vehicle body C in synchronization with the front left and right sides in the reverse direction.

  Specifically, a software program recorded in advance in the computer 70 is operated, various test parameters are input, and a vehicle body rigidity test is started, whereby the load generator 81 and each vehicle body floating device 1 are input / output controlled. can do.

  For example, a signal for generating a predetermined amount of load upward from the computer 70 to the load generator 81 is transmitted. As a result, the piston rod 99 of the load generator 81 starts to rise, and the measured value of the load cell 93 is continuously transmitted to the computer 70. When the specified amount of load is transmitted to the computer 70, the piston rod 99 The ascent stops. In this case, the amount of displacement of the piston rod 99, that is, the amount of displacement of the suspension tower S, is calculated by transmitting the signal of the vertical load displacement measuring unit 97 built in the electric cylinder 98 to the computer 70.

  Therefore, the intended exact load is applied to the suspension tower S, and the displacement due to the load can be obtained accurately.

  Further, since the vehicle body C tends to twist with a load that displaces the suspension tower S upward, the load in the Z direction also changes in the four vehicle body floating devices 1 that hold the vehicle body C. For example, as shown in FIG. 8, the load on the vehicle body floating device 1 located diagonally to the load generator 81 is increased as compared with that before the vehicle body rigidity test, and conversely, the other three vehicle body floating devices 1 The load is reduced compared to before the body rigidity test.

  In this case, the measurement value of the load cell 61 of each vehicle body floating device 1 is continuously transmitted to the computer 70, and the load before the load by the load generator 81 is applied to each electric cylinder 52 of each vehicle body floating device 1. A signal for moving the piston rods 53 up and down is sent back.

  That is, the vertical movable unit 50 is configured so that the torsion of the vehicle body C generated by the load generator 81 cancels out the load measured by the load measuring unit (load cell) 60 of the vehicle body floating device 1 on which the vehicle body C is placed. The position of the vehicle body placing part 2 in the Z direction is automatically controlled by the (electric cylinder 52).

  Further, when the signal of the vertical displacement measuring unit 51 built in the electric cylinder 52 of the vehicle body floating device 1 is transmitted to the computer 70, the displacement amount of the piston rod 53 upward and downward, that is, the displacement of the rocker portion of the vehicle body bottom f. A quantity is calculated.

  Therefore, the twist amount of the vehicle body C in the Z direction can be accurately obtained. In addition, the displacements of the four rockers in the X and Y directions are transmitted to the computer 70 by the measured values obtained by the laser sensors 11 and 11y of the horizontal displacement measuring unit 11 provided in the horizontal movable unit 10 of the vehicle body floating device 1. Can also be obtained.

  In the present embodiment, the horizontal displacement measuring unit 11 is constituted by the reflection type laser sensors 11 and 11y which are precision displacement meters. However, other precision displacement meters may be used, or the X and Y direction movable portions 17 and 11 may be used. 43 may be constituted by an electric cylinder, or may be constituted by an X / Y direction measure with a scale.

  Thus, in the vehicle body rigidity test apparatus 80 according to the present embodiment, after the vehicle body C is placed on the vehicle body floating device 1 on the surface plate J and the load generator 81 is connected, the vehicle body C is automatically leveled. The vehicle body floating device 1 is configured to move so that the load generator 81 applies a load to the vehicle body C and the torsion of the vehicle body C according to the load appears.

  In addition, since the load value and each displacement amount can be automatically acquired, the analysis accuracy in the vehicle body rigidity test can be dramatically improved.

  In this embodiment, the load generator 81 is installed in one suspension tower S on the front wheel side. However, a separate load generator is also installed in the other suspension tower so as to apply loads in the opposite directions. The vehicle body rigidity test can be performed, and furthermore, the vehicle body rigidity test can be performed in various combinations such as installing a load generator in the suspension tower on the rear wheel side.

  As described above, the vehicle body stiffness test apparatus 80 according to the present embodiment includes the vehicle body floating device 1 and the load generator 81 that applies a load in the Z direction to the vehicle body C. The load generator 81 is applied to the vehicle body C. Connectable vehicle body connecting part 82, load measuring part 92 capable of measuring a load as a load, vertical load urging part 96 movable in the Z direction, and vertical load displacement measuring part capable of measuring a displacement amount in the Z direction 97, and the computer 70 is also connected to a load generator 81. The load generator 81 automatically applies a predetermined amount of load to the vehicle body C. Further, the twist of the vehicle body C caused by the load is applied to the vehicle body. The position of the vehicle body placing part 2 in the Z direction is automatically controlled by the vertical movable part 50 so that the load measured by the load measuring part 60 of the vehicle body floating device 1 on which C is placed is canceled. By each body flow Body C which floated artificially by computing device 1 is capable of directly revealing the state in which the twisted without against the twist.

  In the present embodiment, an embodiment in which the vehicle body floating device 1 is used for a vehicle body rigidity test is shown, but it goes without saying that the use of the vehicle body floating device 1 is not limited to this.

  In addition, the vehicle body floating device 1 and the vehicle body rigidity test device 80 according to the present embodiment are devices that can be applied to either a finished automobile or a white body.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims. It can be changed.

C Car body f Car body bottom part 1 Car body floating device 2 Car body placing part 10 Horizontal movable part 11 Horizontal displacement measuring part 19 Linear guide 19y Linear guide 50 Vertical movable part 51 Vertical displacement measuring part 52 Electric cylinder 70 Computer (automatic computer)
DESCRIPTION OF SYMBOLS 80 Car body rigidity test apparatus 81 Load generator 82 Car body connection part 92 Load measuring part 96 Vertical load biasing part 97 Vertical load displacement measuring part

Claims (5)

In order to perform various tests on the vehicle body, a vehicle body floating device that is installed in a plurality of predetermined locations at the bottom of the vehicle body to artificially float the vehicle body,
A vehicle body placing portion, a horizontal movable portion that allows the vehicle body placement portion to move in at least the X and Y directions in an XYZ three-dimensional coordinate system, and a vertical movable portion that allows the vehicle body placement portion to move in the Z direction. A load measuring unit capable of measuring the vehicle body load at the predetermined location;
A vehicle body floating device characterized by comprising:   The horizontal movable unit includes a horizontal displacement measuring unit capable of measuring a displacement amount in the X and Y directions, and the vertical movable unit includes a vertical displacement measuring unit capable of measuring a displacement amount in the Z direction. The vehicle body floating device according to claim 1.   3. The vehicle body floating device according to claim 1, wherein the horizontal movable portion is movable in X and Y directions by a linear guide, and the vertical movable portion is movable in the Z direction by an electric cylinder. . The vehicle body floating device includes an automatic calculator and is connected to the automatic calculator.
When no forced load is applied to the vehicle body, the automatic computer has a plurality of the vehicle body bottom portions on which the plurality of vehicle body floating devices are placed on the same plane and in a horizontal plane. The vehicle body floating device according to any one of claims 1 to 3, wherein each vertical movable portion of the vehicle body floating device is configured to be automatically controlled. The vehicle body floating device according to claim 4,
A load generator for applying a load in the Z direction to the vehicle body,
The load generator can measure a displacement amount in the Z direction, a vehicle body connection portion that can be connected to the vehicle body, a load measurement portion that can measure a load as a load, a vertical load biasing portion that is movable in the Z direction, and A vertical load displacement measuring unit, and
The automatic computer is also connected to the load generator, and automatically applies a predetermined amount of load to the vehicle body by the load generator, and the torsion of the vehicle body caused by the load places the vehicle body. The position of the vehicle body mounting portion in the Z direction is automatically controlled by the vertical movable portion so that the load measured by the load measuring portion of the vehicle body floating device is canceled as a whole. Car body stiffness testing device.

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