JPH06221966A - Flat chassis dynamometer - Google Patents

Abstract

PURPOSE:To obtain a flat chassis dynamometer capable of performing various test for vehicles on an arbitrary angle slope. CONSTITUTION:A flat belt unit 1 and a dynamometer 6 are fixed on a slanting base 17, this slanting base 17 is supported slanting free to left and right directions of a vehicle 2 with a support stage 18 through a support shaft 19, the slanting base 17 is driven with a slope drive part 20 and it is locked with a lock part 21 at this slanting position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat chassis dynamometer in which a tire grounding surface is flattened by using a steel belt or the like.

[0002]

2. Description of the Related Art Conventionally, in order to test the driving performance of a vehicle, a steel belt or the like is placed around the front roller and the rear roller, and the tire of the vehicle under test is placed on the flat belt. The dynamometer absorbs the power transmitted to the dynamometer connected to the roller via the belt and roller, and the reaction force is measured by the load cell via the torque arm, or conversely, via the roller and belt via the dynamometer. A flat chassis dynamometer is used to drive tires.

[0003]

However, in the above-mentioned conventional flat chassis dynamometer,
Since the belt surface is a horizontal surface, only various tests of the vehicle on the horizontal surface can be performed, and various tests of the vehicle on the inclined surface of an arbitrary angle cannot be performed.

The present invention has been made to solve the above problems, and an object thereof is to obtain a flat chassis dynamometer capable of performing various tests of a vehicle on an inclined surface of an arbitrary angle. And

[0005]

A flat chassis dynamometer according to the present invention includes a tilt base on which a flat belt unit and a dynamometer are mounted, and a tilt base supported by a support shaft so as to be tiltable in the left-right direction of a vehicle. And a tilt drive unit that tilts and drives the tilt base, and a tilt base lock unit that locks the tilt base.

[0006]

According to the present invention, the flat belt unit and the dynamometer are mounted and fixed on the tilt base, and the tilt base is supported by the support base via the support shaft so as to be tiltable in the left-right direction of the vehicle. The tilt base is tilt driven by the tilt drive unit, and the tilt position is locked by the tilt base lock unit.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are a front view, a plan view and a schematic side view of a flat chassis dynamometer according to this embodiment, and 1 is a flat belt unit, which is a vehicle under test 2
One is provided under each of the four tires 3. FIG. 4 shows a front view of the flat belt unit 1,
Reference numeral 4 is a fixed roller for fixing the axial position, and 5 is a movable roller for moving the axial position. A dynamometer 6 is incorporated in the fixed roller 4. Reference numeral 7 is a cooling fan provided on the fixed roller 4, 8 is a cooling duct for guiding the air from the cooling fan 7 into the fixed roller 4, and 9 is a steel belt hung around the rollers 4 and 5, and a steel belt is provided above it. The tires 3 of the vehicle 2 are placed on the vehicle 2, and the vehicle 2 is fixed in all directions by wires or the like.

Reference numeral 10 is a water bearing provided on the lower surface of the steel belt 9 for receiving the load of the tire 3,
11 is a connecting shaft attached to the fixed roller 4 (which is also attached to the dynamometer 6), 12 is a torque arm attached to the connecting shaft 11, and 13 is between the torque arm 12 and the fixed portion. A connected load cell, 14 is a slide type bearing that supports the shaft of the movable roller 5, 15 is a hydraulic cylinder that drives the slide type bearing 14, and 16 is a pedestal that supports the whole. 17 is a flat belt unit 1
And a tilt base on which the dynamometer 6 is mounted and fixed, 1
Reference numeral 7a is an arm portion of the inclined base 17, and 18 is an arm portion 17.
This is a support base for swingably supporting a through a support shaft 19. Reference numeral 20 denotes a tilt drive unit using an electric two-clew or the like, which tilts the tilt base 17 in the left-right direction of the vehicle 2. The operating speed is about 7 to 20 sec / 5 °. Two
Reference numeral 1 denotes a tilt base lock portion that stops the tilt base 17 when the tilt base 17 is tilted by a predetermined angle, and locks the tilt base 17 steplessly by using, for example, a hydraulic disc brake or the like to prevent vibrations accompanying the driving of the vehicle 2. It prevents the inclination angle from changing. Usually, the inclination angle a is about ± 5 °.

In the above structure, when the tire 3 is rotated, its power is transmitted to the rollers 4 and 5 and the dynamometer 6 via the steel belt and is absorbed by the dynamometer 6. Then, the reaction force is measured by the load cell 15 via the torque arm 12. On the contrary, the tire 3 can be rotated by driving the dynamometer 6.
If you want to test the vehicle 2 on a horizontal plane, tilt base 17
Is locked and locked by the lock portion 21. As a result, the steel belt 9 becomes horizontal, and the test can be performed on the horizontal plane of the vehicle 2. When the vehicle 2 is to be tested on an inclined surface, the steel belt 9 has a predetermined inclination angle by inclining the inclination base 17 to an arbitrary angle by the inclination drive unit 20 and locking it by the lock unit 21. A performance test or the like of the vehicle 2 can be performed on the surface. In the above-mentioned embodiment, the case of the flat chassis dynamometer is shown, but the same effect can be obtained also with the roller type dynamometer.

[0010]

As described above, according to the present invention, the tilting base on which the flat belt unit and the dynamometer are mounted and fixed is tilted by the tilting drive part and locked by the locking part, so that the tilting base is locked only on the horizontal plane. Instead, various driving performance tests of the vehicle on the inclined surface, straightness test during acceleration / deceleration, braking stability test, vibration, noise test, tire characteristic test, etc. can be performed.

[Brief description of drawings]

FIG. 1 is a front view of a flat chassis dynamometer according to the present invention.

FIG. 2 is a plan view of a flat chassis dynamometer according to the present invention.

FIG. 3 is a schematic side view of a flat chassis dynamometer according to the present invention.

FIG. 4 is a front view of the flat belt unit of the flat chassis dynamometer according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Flat belt unit 2 ... Vehicle 3 ... Tire 4, 5 ... Roller 6 ... Dynamometer 9 ... Steel belt 17 ... Tilt base 18 ... Support stand 19 ... Support shaft 20 ... Tilt drive part 21 ... Tilt base lock part

Claims (1)

[Claims] 1. A flat belt unit in which a belt is hung between a pair of rollers, and a dynamometer that rotates integrally with one roller are provided, and power from a tire of a vehicle placed on a flat belt is transferred to the belt. In a flat chassis dynamometer that absorbs with a dynamometer or drives a tire of the vehicle with a dynamometer, a flat base unit and a sloping base on which the dynamometer is mounted and fixed, and a vehicle with the sloping base via a support shaft A flat chassis dynamometer, comprising: a support base that tilts in the left-right direction, a tilt drive unit that tilts and drives a tilt base, and a tilt base lock unit that locks the tilt base.