JPS6311627Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is an automobile chassis dynamometer,
This article relates to an automobile fixing device for fixing a test vehicle in power performance tests using brake dynamometers, exhaust gas tests, fuel-related tests, and others.

Conventionally, vehicle securing devices for this purpose have employed a method in which triangular wheel chocks are installed on the front side of the vehicle's tires, excluding the drive wheels, and the tires are firmly pressed against the vehicle chocks using a fork-shaped device to secure the tires.
In this case, due to the relationship between the pushing force and displacement of the tire surface, the receiving angle of the bollard, and the elasticity of the wheel system, the vehicle body is displaced not only vertically but also longitudinally, so when there is a sudden change in driving force such as when changing gears, The vehicle body may be displaced by more than 15 mm, and vibration-like displacement may occur. Such large displacements and vibrations in the longitudinal direction of the vehicle body not only cause errors in measurement, but also impair riding comfort.

The present invention not only reduces such measurement error factors, but also prevents lateral movement of the vehicle body and suppresses longitudinal displacement, making it safe and simple.
This provides a reliable vehicle fixing device.

As shown in FIG. 1, an adapter 4 to which a cushion 3 is attached is attached to the front surface of a front bumper 2 of a test vehicle 1 by being bound by a ligament 5. The adapter 4 is attached to the fixed frame 6 by connecting bolts 7 at the appropriate angle and height,
The adapter 4 is attached so as to be slidable only in the vertical direction along the vertical sliding surfaces 6a, 6b of the fixed frame 6, or fixed in a non-slidable manner as necessary. The fixed frame 6 has strong rigidity and is fixed at an appropriate position on the base 21. To attach the adapter 4 to the fixed frame 6, as shown in FIGS. 2 and 3, use the bumper 2.
Even if the angle of the adapter 4 is changed depending on the angle of the surface of Bracket 1
0 and 11 sandwich the arcuate surface of the adapter 4 and tighten with the nut 12. Sliders 13 and 14 made of a plastic material with good lubricity are arranged between the sliding surface and the presser metal fitting 15, and the locking nuts 16 and 17 are used to hold the connecting bolt 7 along the sliding surface while keeping it almost horizontal. It can be attached so that it can slide on the slider, or if necessary, it can be attached so that it cannot be slid by firmly pressing it against the sliding surface. With this device, the force that attempts to move the vehicle 1 forward or backward due to the reaction force of the drive wheels of the vehicle rotating on the rollers 9 is received by the fixed frame 6, and the bumper 2 hardly moves. It can be stopped. However, due to the elastic displacement between the vehicle body and the surface of the bumper and the deformation of the cushion 3, the test vehicle should be allowed to move within ±3 mm in the horizontal direction within the normal driving force variation range. This device usually consists of two sets of similar devices and is attached to both sides of the bumper in almost symmetrical positions to balance the forces and suppress the left and right movement of the front bumper and drive wheels.

When fixing and driving a vehicle using a chassis dynamometer using the present invention, the fixing device is extremely easy to use, the position can be set accurately, there is no risk of the vehicle body moving left or right, and the acceleration and deceleration of the vehicle is If the vibration is large, vibrations caused by irregular tire shapes, etc., especially when changing gears or at low speeds, will give a riding feeling similar to that when actually driving on a flat paved road, and the front and rear of the vehicle will be affected. Directional vibration is strongly suppressed, and measurement errors in various tests can be significantly reduced. If the adapter 4 is set to be slidable relative to the fixed frame 6, the vehicle body can be freely displaced in the vertical direction according to changes in the vehicle's loading capacity, and the adapter 4 is set to be slidable relative to the fixed frame 6.
When the bumper is set not to slide against the bumper, vertical displacement of the bumper is also suppressed, and vertical vibration of the vehicle body is also suppressed to some extent, making measurement easier. This device is a vehicle fixing device that securely and stably maintains the longitudinal position of the vehicle regardless of the elasticity of the wheel system, and can be used not only for the front bumper but also for the rear bumper and other areas.

[Brief explanation of the drawing]

Figure 1 is a side explanatory view showing the device of the present invention attached to the front bumper when driving a car on a chassis dynamometer, Figure 2 is a sectional view of the adapter part attached to the bumper, and Figure 3 The figure is a side view of the adapter part attached to the bumper. 1: Test vehicle, 2: Front bumper, 3: Cushion, 4: Adapter, 5: Ligament, 6: Fixed frame, 7: Connection bolt, 8: Drive wheel, 9: Chassis dynamometer roller, 10: Adapter clamp (Inside), 11: Adapter clip (outside), 12: Metal fitting tightening nut, 13: Slider, 14: Slider bush, 15: Holding metal fitting, 16: Lock nut, 17: Nut, 18:
Adapter mounting groove, 19: Frame mounting groove,
20: Ligament fastener, 21: Foundation.

Claims (1)

[Scope of utility model registration request] When driving a car with a fixed position such as a chassis dynamometer, attach an adapter to a part of the car body such as the front bumper, and attach this adapter to a fixed frame with sufficient rigidity to determine the longitudinal position of the car body. In an automobile fixing device that mainly receives forces in the longitudinal direction, a cushion made of rubber or other plastic material is used in the part of the adapter that contacts the surface of the bumper, etc., and a ligament is used to attach the adapter to the bumper, etc. The height and angle of the adapter can be adjusted according to the height and surface angle of the bumper etc. with respect to the fixed frame by bonding and crimping, so that the adapter does not displace in the front, back, left and right directions, and in the vertical direction. An automobile fixing device that is attached to the fixing frame in a state where displacement is possible or impossible.