JPH0411151Y2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial field of application This invention is applicable to the palm dynamometer (hereinafter referred to as
(abbreviated as CHDY)) relates to a vehicle restraint system that fixes a test vehicle on top of a vehicle under test.

B. Overview of the invention This invention relates to a restraint system for a vehicle placed on a CHDY, which is attached to the wheels of a vehicle and restrains the wheels, thereby restraining the vehicle. In order to improve the reproducibility of running conditions and obtain more accurate experimental data, a tapered surface or a spherical surface is formed between the spacer fixed to the wheel and the flange connecting the spacer to the restraint device main body. The center of rotation of the wheel can be easily aligned with the center axis of the support shaft provided on the flange by pressing and fixing both together and moving the flange relative to the spacer during assembly. It is.

C. Conventional technology Since CHDY can easily conduct indoor experiments equivalent to actual driving on the road with good reproducibility, it can be used to test vehicle exhaust gas characteristics, fuel consumption characteristics, etc., and more recently, to conduct tests during high-speed driving. It is used for research and experiments on stability and stability. and like this
In order to obtain more accurate data using CHDY, it is necessary that the experimental settings closely approximate the actual running of the vehicle. For drive vehicles or rear wheel drive vehicles, a CHDY in which all four wheels are placed on rollers and rotated has been developed. CHDY that rotates the four wheels of such vehicles
Conventionally, a test vehicle was fixed to the top using a wire rope 100 as shown in FIGS. 13 and 14. That is, as shown in the figure, rollers 102 and 10 are rotatably provided under the floor surface.
4 is connected to a load device such as a flywheel (not shown), and the front and rear wheels 108 of the vehicle 106 are placed on the upper surfaces of these rollers 102 and 104, and the rollers 102 and 10 are driven by the driving force of the vehicle 106.
4, and the vehicle 1
One end of a wire rope 100 is connected to the floor and the other end of a wire rope 100 is tied to the front end and the rear end of the vehicle 06 to position and fix the vehicle 106 in the longitudinal direction of the vehicle 106. Further, the wire rope 100 is stretched across the left and right sides so that the vehicle 106 is fixed not only in the front-back direction but also in the left-right direction.

D Problems to be Solved by the Invention Although such a fixing method using the wire rope 100 is easy to handle, it has the following problems.

(b) During acceleration and deceleration, a propulsive force is generated and the vehicle body tries to move back and forth, so the wire rope 100 expands and contracts and causes waves, and as a result of the vehicle body vibrating back and forth, the wire rope 100 as shown in FIG. 10
0 is pulling the vehicle body downward, so the vertical component of the pulling force makes it appear as if the weight of the vehicle has increased, causing an error in the fixed value of power absorption and making accurate power measurement impossible.

(b) If the vehicle body vibrates or a load is applied due to the above reasons, the suspension or tires may become deformed or other inconveniences.

The present invention aims to solve the problems of the prior art described above by restraining the wheels rather than the vehicle body, and to provide a vehicle restraint device that can create a state similar to actual driving through CHDY. purpose.

E. Means for Solving the Problems Therefore, the present invention includes a mounting shaft having a flange fixed to the wheel hub of a wheel mounted on a load device of a chassis dynamometer, and a rotatable and arbitrary mounting shaft. a rotary rocking device that supports the rotary rocking device so as to be swingable in the direction; a link mechanism that is attached to a base and supports the rotary rocking device so that the rotary rocking device is immovable in the front-back direction and movable in the vertical and horizontal directions; and the wheel hub; a spacer interposed between the flange and the flange, one of the abutting surfaces of the flange and the spacer is concave, and the other can be fixed at any angle with respect to the concave abutting surface. The axial center of the mounting shaft is made to coincide with the center of rotation of the wheel hub by forming a convex shape.

Here, one of the contact surfaces with the flange and the spacer is a concave spherical surface,
By making the other a convex spherical surface along the concave spherical surface, the concave spherical surface and the convex spherical surface may be fixed at any angle, and the contact between them may be One of the surfaces is a concave tapered surface, and the other is a convex surface having a ridge that abuts and bites into the concave tapered surface, so that a convex surface having the ridge with respect to the concave tapered surface It may also be possible to fix it at any angle.

F Effect A spacer is interposed between the wheel hub and the flange of the wheel, one of the contact surfaces between the spacer and the flange is a concave spherical surface, and the other is a convex spherical surface along the concave spherical surface. By making it a surface, by sliding the convex spherical surface in any direction relative to the concave spherical surface, it becomes possible to align the axis of the mounting shaft with the rotation center of the wheel hub.

Alternatively, a spacer is interposed between the wheel hub and the flange of the wheel, one of the abutting surfaces between the spacer and the flange is a concave tapered surface, and the other is a ridge that abuts and bites into the concave tapered surface. By making the convex surface have a convex surface, it is possible to align the axis of the mounting shaft with the center of rotation of the wheel hub by adjusting the position where the edge bites into the concave tapered surface.

G Embodiment FIGS. 1 to 4 show a vehicle restraint system 2 which is an embodiment of the present invention, and as shown in FIGS. 5 and 6, a chassis dynamometer 6 (which is a vehicle performance testing device) (hereinafter abbreviated as CHDY6). The CHDY 6 supports the first roller 12 on which the front wheels 10 of the vehicle 4, which is the vehicle under test, and the second roller 16 on which the rear wheels 14 are placed, respectively, on a first support stand 18 and a second support stand 20 under the floor surface 8. The first support stand 18 is fixed on the base 22, and the second support stand 20 is screwed onto a feed screw 26 extending from the drive mechanism 24.
The distance between the first roller 12 and the second roller 18 can be expanded or contracted by the rotation of the rollers, and each of the first roller 12 and the second roller 16 is equipped with a load device such as a speed increaser, a flywheel, etc., and a test result detection device ( (none of which are shown), etc. are connected.

The vehicle restraint device 2 includes the above CHDY6,
Left and right rear wheels 1 of vehicle 4 mounted on this CHDY6
4 are installed facing each other, and this rear wheel 1
Rear wheel 14 without providing support for rotational movement etc. of 4.
It is designed to restrict movement in the front and rear directions.
The configuration will be explained below using figures. As shown in FIG. 4, the frame body 30 of the link mechanism 29 is approximately rectangular, and its lower side 30a is attached to the bearing portion 32 along the longitudinal direction of the vehicle 4 and approximately horizontally. Reinforcing members 34 are provided on the diagonal of the frame to prevent distortion. The bearing portion 32 is provided on the floor surface 8, and rotatably supports the lower side portion 30a, and a slide mechanism 33 is provided on one side of the bearing portion 32.
This allows the frame body 30 to be moved along the longitudinal direction of the vehicle 4. Further, the frame body 30 has reinforcing members 36 provided at the four corners in a conical shape on the opposite side of the vehicle body 4 in order to prevent the frame body 30 from twisting or the like. Further, a triangular support arm 38 with the upper side 30b as one side is rotatably attached to the upper side 30b of the upper part of the frame body 30, and the rotary swing device 27 is attached to the rotation end of the support arm 38. Equipped on the side.

The rotating and swinging device 27 is fitted with a flange 50, and its configuration is shown in FIG. As shown in the figure, the outer cylinder 52 is directly fixed to the support arm 38, and a pair of bearings 56 are coaxially attached to an inner ring 54a of a spherical bearing 54 provided inside the outer cylinder 52. Attached to 56a is a cylindrical fitting portion 58 whose inner diameter is enlarged toward the left side in the figure.

On the other hand, for the rear wheel 14, a nut bolt 68 is screwed into a hub bolt 66 provided on a wheel hub 60 to fix the brake drum 62, wheel 64, etc.
The nut bolt 68 has a nut 68a on one side and a bolt 68b fixed coaxially with the nut 68a on the other side.The nut 68a fixes the wheel 64 etc. to the wheel hub 60, and at the same time, A bolt 68b can be provided on the outside. A spacer 51 and a flange 50 are fitted into the bolt 68b, and these are stacked and fixed with a nut 70.

The spacer 51 has a surface 69 on the wheel 64 side.
is flat and the surface 67 on the other side of this surface 69 is concave, and the bolt 68b
A bolt hole 53 is provided through which the bolt is passed. The concave shape of the surface 67 is a truncated cone, and the inclined surface, that is, the first
The tapered surface 71 is symmetrical about the central axis of the wheel 64, and the bottom surface 73 corresponding to the bottom is formed perpendicular to the central axis. On the other hand, the flange 50 is attached to one side of the mounting shaft 50a.
The mounting shaft 50a is formed to become thinner toward the tip so as to fit into the fitting portion 58, and the spacer 51 side of the circular plate 55 is formed by integrally attaching a circular plate 55 perpendicular to end face 57 of
is formed into a truncated cone-shaped convex surface that follows the concave shape formed on the spacer 51. More specifically, as also shown in FIG. When the first tapered surface 71 is fitted, the upper surface 82 corresponding to the top surface of the truncated cone is formed in close contact with the bottom surface 73 formed on the spacer 51, or so that there is even a slight gap between the upper surface 82 and the upper surface 82. The ridge 84 formed by the second tapered surface 82 and the second tapered surface 80 comes into contact with the first tapered surface 71. Furthermore, a bolt 68 is attached to the circular plate 55 in the same way as the spacer 51.
A bolt hole 86 is provided through which b is passed, and the mounting shaft 5
A nut 72 for fixing the mounting shaft 50a to the fitting portion 58 is attached to the tip of the shaft 0a.

Next, an example of use of the vehicle restraint device 2 described above will be described.

The spacer 5 is attached to the wheel 64 of the vehicle 4 described above.
1, and the mounting shaft 50a of the flange 50 is fixed to the fitting portion 58 of the rotation swinging device 27. The mounting mechanism section 29 is attached to the frame body 30
is rotatable with respect to the floor surface 8, and the support arm 38
Since it is rotatable with respect to the frame body 30, the rotary swing device 27 attached to the rotating end of the support arm 38 can be set at any position along the vehicle 4, vertically or horizontally. Furthermore, if necessary, the frame body 30 can be moved in the front and back direction by operating the slide mechanism 33. Moreover, a spherical bearing 54 is provided on the rotary swing device 27, which allows the flange 5
Since the mounting shaft 50a of the vehicle 4 is supported,
Regardless of the type of wheel 64, the rotary swing device 27 can be set at the position of the rear wheel 14, and the front and rear directions of the wheel 64 can be restrained. Furthermore, flange 5
0 is attached to the wheel 64 via the spacer 51, the flange 50 can be moved relative to the spacer 51 within the tapered surface between them, and therefore the direction of the mounting shaft 50a can be slightly moved. can be done. This is flange 50
and the spacer 51 are fixed to each other, the second tapered surface 80 and the first tapered surface 71 are in contact with each other, that is, the top surface 82 is in front contact with the bottom surface 73,
Alternatively, as shown in FIG.
1 or the bottom surface 73, and even if this ridge 84 is slight,
This is because it can be stably fixed by biting into the opposing spacers 51. 8 and 9 are enlarged views of portions A and B in FIG. 7. Since the flange 50 can be fixed using the edge 84 in this way, the mounting shaft 50a can be fixed after being moved by a small amount in any direction. Therefore, even if the wheel 64 is distorted or the nut 68a is not accurately positioned in a plane perpendicular to the center of rotation of the wheel 64 due to uneven tightening torque of the nut bolt 68, The mounting shaft 50a can be easily adapted to the center of rotation of the wheel 64. Moreover, since the adjustment work is performed by moving the relative position of the tapered surface, there is no need for an intervening material such as a liner to increase the height of the seat surface of the nut 68a, which would otherwise occur when such a liner was used. Problems such as the trouble of preparing a variety of liners with different thicknesses and the careful tightening work that takes liner deformation into consideration are eliminated.

FIG. 10 shows a second embodiment of the spacer and flange, in which a convex tapered surface is formed on the spacer 81, and a concave tapered surface is formed on one flange 83 side. The same effects as described in the first embodiment can be brought about.

FIG. 11 shows a third embodiment, in which a concave tapered surface 92 is formed on a flange 90, and a spacer 94 that contacts this is formed into a disk shape with a smaller diameter than the flange 90, and the taper is formed on the spacer 94.
It is not formed on the surface 96 on the fourth side, but on the surface 96 and the side surface 96a.
The ridge 98 formed by the flange 90 comes into direct contact with the tapered surface 92 of the flange 90. In such a configuration, the edge 98 is the tapered surface 92 of the flange 90.
The flange 90 and spacer 94
can be fixed in any positional relationship, and can be fixed at that position after moving the flange 90 with respect to the spacer 94 along the tapered surface 92. The mounting shaft 90a can be easily aligned with the center of rotation of the wheel provided on the spacer 94 side.

FIG. 12 shows a fourth embodiment, in which a concave tapered surface 94a is formed on a spacer 94, and a ridge 98 formed on one flange 90 with a surface orthogonal to each other.
However, it has the same effect as the third embodiment.

FIG. 13 shows a fifth embodiment, in which a spacer 110
A concave spherical surface 112 is formed on one flange 114, and a convex spherical surface 116 along the spherical surface 112 is formed on one flange 114.
4 are in contact with these spherical surfaces 112 and 116. In this way, the flange 114 can be moved along the spherical surface 112 formed on the spacer 110, and the flange 114 can be fixed at an arbitrary angle with respect to the spacer 110. In the above example, the spherical surface 112 on the side of the spacer 110 is made concave, but the relationship between the concaves and convexities is not limited to this, and the flange 114
and the spacer 110 and the flange 114
The spherical surface 112 on the side of the spacer 110 may be formed into a convex shape with a concave side.

The vehicle restraint device 2 according to the present invention is not limited to a CHDY using rollers, but may also be a CHDY using a belt, and the location where it is attached to the vehicle is not limited to the rear wheels, but may also be installed on the front wheels. .

G. Effects of the invention As explained above based on the embodiments, the vehicle restraint device of the present invention is composed of a link mechanism, a rotating swing device, a flange, etc., and is configured to restrain the wheels of a vehicle placed on a CHDY. Therefore, unlike conventional methods that use wire ropes to restrain the vehicle body, it is possible to perform highly accurate tests without torque errors, making it possible to perform tests that are close to actual road driving. In addition, since the wheel and the fitting part are connected by the flange and spacer, which are connected via a tapered or spherical surface, by moving the flange relative to the spacer, the center of the flange's mounting axis can be easily adjusted to the wheel. It has various excellent effects such as being able to match the center of rotation of the object, and the fact that the above effects can be obtained has already been confirmed through experiments.

[Brief explanation of the drawing]

1 to 13 are related to the present invention, in which FIG. 1 is a partial sectional view showing the flange portion of the vehicle restraint device, FIG. 2 is a plan view showing one embodiment of the vehicle restraint device, and FIG. Figure 4 is the side view of Figure 2, Figure 4 is the front view of Figure 2, and Figure 5 is the vehicle restraint system installed.
A plan view of CHDY, Fig. 6 is a side view of Fig. 5, Fig. 7 is a sectional view showing the joint state of the flange and spacer, Fig. 8 is an enlarged view of section A in Fig. 7, and Fig. 9 is a side view of Fig. 5. 7 is an enlarged view of part B, FIG. 10 is a sectional view showing the second embodiment of the spacer and flange, FIG. 11 is a sectional view of the third embodiment of the spacer and flange, and FIG. 12 is a sectional view of the spacer and flange. 13 is a sectional view showing the fifth embodiment of the spacer and flange; FIG. 14 is a sectional view showing the fourth embodiment;
This figure is a plan view for explaining a conventional vehicle body fixing means, and FIG. 15 is a side view of FIG. 14. In the drawings, 2 is a vehicle restraint system, 4 is a vehicle, and 6 is a vehicle restraint device.
CHDY, 27 is a rotating swing device, 29 is a link mechanism, 50, 83, 90, 114 is a flange, 50
a, 83a, 90a are mounting shafts, 51, 81, 9
4,110 is a spacer, 64 is a wheel, 11
2,116 is a spherical surface.

Claims (1)

[Claims for Utility Model Registration] (1) A mounting shaft having a flange fixed to the wheel hub of a wheel mounted on a load device of a chassis dynamometer, and the mounting shaft being rotatable and movable in any direction. a rotary rocking device that supports the rotary rocking device so as to be swingable; a link mechanism that is attached to a base and supports the rotary rocking device so that the rotary rocking device is immovable in the front-back direction and movable in the vertical and horizontal directions; the wheel hub and the flange. a spacer interposed between the flange and the spacer, one of the abutting surfaces of the flange and the spacer is concave, and the other is a protrusion that can be fixed at an arbitrary angle with respect to the concave abutting surface. A vehicle restraint device characterized in that the axial center of the mounting shaft is aligned with the center of rotation of the wheel hub by forming the mounting shaft into a shape. (2) By making one of the abutment surfaces of the flange and the spacer a concave spherical surface and the other a convex spherical surface along the concave spherical surface, the concave spherical surface and the The vehicle restraint device according to claim 1, wherein the convex spherical surface can be fixed at any angle. (3) One of the abutting surfaces of the flange and the spacer is a concave tapered surface, and the other is a convex surface having a ridge that abuts and bites into the concave tapered surface. The vehicle restraint device according to claim 1, wherein the convex surface having the ridge can be fixed at any angle to the tapered surface.