JPH0330006B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a hinge joint device, particularly for use in testing equipment, having a plurality of ball joints with no play. bearing studs, a clamping element for clamping these bearing studs to each other or to the ball head, and a loosening element acting against the clamping force of the clamping elements, the ball head being provided with a tensile force approximately along its axis. and a ball shaft on which a compressive force is applied, one of the bearings has a through opening for the ball shaft, and the dividing surface between both bearings is oriented toward the axis of the ball shaft or the load direction. The present invention relates to a hinge joint device which is located substantially perpendicularly to the bearing metal and in which a gap or gap exists between both bearing metals.

When an automobile is tested under conditions suitable for a road running test, forces are applied to the automobile wheels or force introduction elements acting on behalf of these wheels on the test stand in the three axial directions x, y, and z of a three-dimensional coordinate system. be introduced. Therefore, on axle and body test stands,
It is desirable to apply the force to be introduced from the test device to the test object at a theoretical force introduction point where the force actually acts when, for example, a car drives on a road surface.
Such a theoretical force introduction point is, for example, the wheel upright point. However, it is difficult to introduce multiple forces to one point at the same time.

Conventionally known systems for axle and vehicle body test stands have complex structures, the distance between the actual and theoretical force introduction points is too large, the weight or mass is large, and there is play in the hinge joints. (Creates problems in the controlled equipment and causes wear problems)
It has a number of drawbacks, such as:

The aim of the invention is to completely or partially obviate these drawbacks. This object is achieved according to the invention by the measures specified in the characterizing part of claim 1. Advantageous embodiments of the invention are summarized in the subclaims.

The advantage of the device according to the invention is that the hinge points have a very small distance from each other and can be easily followed, and that the hinge joint device has a small mass. The no-play property of the hinge joint device is
Problems such as, for example, the occurrence of hysteresis during repeated loading of directional forces (tensile and compressive forces) in the controlled device are eliminated.

The present invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 schematically shows a test structure with a force-introducing element 1, which is used, for example, as an axle or as a wheel replacement on a motor vehicle test stand, and which is connected in a suitable manner to the shaft to be tested. has been done. The force introduction element 1 has a hinge joint or hinge 3 which is arranged at the theoretical force introduction point or wheel upright point 4 . The hinge part 3 includes three play-free ball joints 5, which are connected to force introducing elements such as tension/compression rods 5a, 6a, 7a.
It consists of 6 and 7. For example, a force or a stroke is introduced into the hinge part 3 via the force-introducing element and the drive element 5b, 6b, 7b. The drive elements 5b, 6b, 7b are designed, for example, as hydraulic cylinders.

In the case of the illustrated device, the theoretical force introduction point or wheel upright point 4 coincides with the center of the ball joint 5, ie the ball joint 5 is arranged at the theoretical force introduction point 4. The remaining two ball joints 6, 7 are located in the immediate vicinity of the ball joint 5 or the wheel upright point 4.

The directions of action of the tension/compression rods 5a, 6a, 7a are approximately perpendicular to each other and intersect at the wheel upright point 4 or at the theoretical force introduction point. Let the direction of action of the rod 5a be the x direction, the direction of action of the rod 6a be the y direction, and the direction of action of the rod 7a be the z direction. Therefore, bars 5a and 6a form an xy plane, and bars 5a and 7a
The xz plane is formed, and the rods 6a and 7a form the yz plane.

A further hinge joint 8 is arranged on the force introduction element 1 . This joint is connected to the rod 7a via an auxiliary rod 7c, which is, for example, a ball joint 5 and a rod 5a.
It is used to support the rotational torque of the force introduction element 1 rotatably supported on the axle 2 when a longitudinal force is introduced through the axle 2 . Therefore, when testing on braked wheels, force introduction element 1
is firmly connected to the axle 2, so that the auxiliary rod 7
c is omitted, cut off, or removed.

FIG. 3 shows a hinge joint device with a force-introducing element 1 and an auxiliary rod 7c in a perspective view. The same parts as in FIG. 1 are given the same reference numerals. This figure also schematically shows the main body 11 of the hinge part 3, which is shown in more detail in FIGS. 2a to 2c. Although the force-introducing element 1 is shown in FIG. 3 as a substantially round element, it could also be trapezoidal, as shown in FIG. 1, or of another suitable shape.

2a to 2c each show the hinge part 3 with the body 11 in a sectional view through the theoretical force introduction point or wheel upright point 4. FIGS. The body 11 is formed, for example, in the form of a cube or a rectangular parallelepiped, and has a cylindrical portion for each ball joint.

FIG. 2a shows a play-free ball joint 5 in section in the xz plane with a ball head 5' and a ball shank 5''. It is connected.

The ball joint 5 is arranged in a cutout recess 12 of the main body 11. A bearing metal 13 having a through opening is inserted into the cutting recess 12, and the ball head 5' is connected to the main body 11 via the bearing metal 13. The tightening and loosening bolts necessary for this purpose are arranged on the bearing 13 and are only schematically shown in dash-dotted lines for the sake of clarity.

A ball joint 7 is arranged in the main body 11 below the ball joint 5. Since this ball joint 7 is formed larger than the ball joint 5, a large force can be transmitted through the ball joint 7.

In the case of the ball joint 7, as in the case of the ball joint 5, a ball head 7' is connected to a ball shaft 7'', which in turn is connected to a shaft 7a. The ball head 7' is attached to the main body 1 without any play by tightening bolts and loosening bolts shown by dashed lines on the bearing metal 14 provided with the through opening.
It is supported within 1.

FIGS. 2b and 2c show the wheel upright point 4, the ball joints 5, 6, 7, respectively, in cross-sections in the xy plane and the yz plane, respectively, corresponding to FIG. 2a.
Tension/compression rods 5a, 6a, 7a, bearing metal 13,
14, 15, and the main body 11. In Figure 2c all three ball joints can be seen. This is because these ball joints are located in the yz plane shown here.

Ball joints can also be arranged so that all ball joints are located in the xy plane or the xz plane.

Instead of the three ball joints 5, 6, 7, the hinge part 3 can also be provided with only two joints.

In the case of a hinge part 3 with three ball joints 5, 6, 7, these ball joints can also be arranged at the same distance from the theoretical force introduction point 4.

Each ball joint 5, 6, 7 can be sealed, for example against dust, by a cuff or similar sealing element in a manner not shown. The cuff or sealing element may be, for example, a tension/compression rod 5a, 6a, 7.
a and the main body 11.

As described above, in the present invention, a plurality of ball joints are provided in close proximity to each other on a common body, and these ball joints are installed as force introduction devices on, for example, an axle or a vehicle body test stand, thereby applying force to a running automobile, wheels, etc. Forces in the X, Y, and Z directions can be accurately simulated, making it possible to perform vehicle performance tests with high precision.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a hinge joint device having three play-free ball joints for introducing forces in three directions to a test object, such as an automobile axle, and Fig. 2 is a schematic diagram of a hinge joint device having three play-free ball joints. 2a, 2b, and 2c are sectional views taken in the xz plane, xy plane, and yz plane, respectively; FIG. ,
FIG. 3 is a perspective view of a hinge joint device having three playless ball joints. DESCRIPTION OF SYMBOLS 1... Force introducing element, 2... Axle to be tested, 3... Hinge part, 4... Wheel upright point, 5, 6, 7... Ball joint, 11... Main body.

Claims (1)

[Scope of Claims] 1. A test structure having a force introducing element 1, and a plurality of tensile structures capable of applying a tensile or compressive force in any direction to the force introducing element 1 and having a ball head at the shaft end. / Compression rods 5a, 6a, 7a
and a hinge part 3 which rotatably connects the ball head at the shaft end of each of these tension/compression rods 5a, 6a, 7a, and this hinge part 3 includes:
a bearing body 11 having an inner spherical surface that commonly accommodates all of the ball heads of the plurality of tension/compression rods 5a, 6a, 7a; and the ball heads;
Bearing metals 13, 1 each having a through opening through which the shaft portion of each of the tension/compression rods 5a, 6a, 7a is inserted.
4, 15, a tightening element for forcibly narrowing the distance between the bearings, and a loosening element for forcibly widening the distance between the bearings. Hinge joint device for testing equipment. 2. A hinged joint of a testing device according to claim 1, characterized in that the ball joints 5, 6, 7 are arranged in the main body 11 so as to be able to transmit forces acting at approximately right angles. Device. 3. A hinge joint device for a testing device according to claim 1 or 2, characterized in that the ball joints 5, 6, and 7 are arranged at a very small distance from each other. 4 A first hole joint 5 is arranged at the theoretical force introduction point 4 and a second ball joint 6, 7 or a further hinge joint is arranged at a distance from the theoretical force introduction point 4. A hinge joint device for a test device according to any one of claims 1 to 3, characterized in that: 5. Any one of claims 1 to 3, characterized in that all ball joints 5, 6, 7 are arranged at the same distance from the theoretical force introduction point 4. The hinge joint device of the test device described in . 6. Claims 1 to 7, characterized in that the ball joints 5, 6, and 7 are arranged so that the acting direction of the force to be transmitted passes through the theoretical force introduction point 4 of the hinge joint device. 6. A hinge joint device for a test device according to any one of Item 5. 7. Any one of claims 1 to 6, characterized in that the ball joints 5, 6, 7 have different sizes, in particular for transmitting forces of different sizes. The hinge joint device of the test device described in Section 1.