JPH0348514Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a chassis dynamometer that can measure the chassis output characteristics of a vehicle under test.

"Conventional technology" Traditionally, the chassis dynamometer was
As disclosed in No. 27242 and Japanese Utility Model Publication No. 57-51310, most of the test devices were roller drive type test devices.

In other words, in this type of chassis dynamometer, the vehicle under test rides directly onto the front and rear rollers installed on a mount, and the rotational force of the rollers, which are linked to the rear wheels driven by engine power, is converted into electricity. It was used to test the engine's horsepower, etc. by taking out the engine.

Therefore, in the case of such a roller-driven chassis dynamometer, the wheels of the vehicle under test must be placed on the rollers during testing, which makes the device itself large-scale and A complicated adjustment device was also required to adjust the position of the movable roller in accordance with the wheelbase of the test vehicle. In addition, to prevent the vehicle under test from jumping out of the test equipment, for example,
As in the embodiment of No. 184942, a fixing device such as a chain was required. Furthermore, unlike speedometer testers, which complete tests in a short period of time, chassis dynamometers perform tests over a relatively long period of time, so frictional heat is generated between the rollers and wheels, resulting in tire wear. Therefore, a cooling device was needed to cool down the heat from the tire, as in the embodiment of Utility Model Application No. 174850/1983.

``Problems to be solved by the present invention'' In view of the above-mentioned shortcomings of the conventional technology, the present invention can reduce the overall size of the test equipment itself, requires less installation space, and furthermore, To obtain an inexpensive chassis dynamometer that does not require a fixing device for fixing or a cooling device for cooling its tires.

``Means for Solving the Problems'' The chassis dynamometer of the present invention includes a dynamometer disposed in a pit, and a test object with one end connected to the dynamometer and the other end located above the pit. and a power transmission means connected to the vehicle.

``Embodiments of the present invention'' The present invention will be described in detail with reference to the embodiments shown in the drawings.

In one embodiment shown in FIGS. 1 to 3,
1 is a pit formed on the floor F; this pit 1
As shown in FIG. 2, is formed to be wider than the vehicle width of the test vehicle 3 supported by a plurality of support members 2 directly above the pit 1. 4 is a dynamometer located directly below the vehicle under test 3 or located near the center of the pit 1;
A flywheel 5 is provided coaxially with the two, and both 4 and 5 are connected by a coupling. The dynamometer 4 has the function of extracting or absorbing the driving force from the vehicle under test 3, and the function of applying the driving force to the vehicle.

Reference numeral 6 denotes a power transmission means having one end connected to the dynamometer 4 and the other end connected to the vehicle under test 3 located directly above the pit 1. This power transmission means 6
In this embodiment, for example, as shown in FIG. 3, a plurality of bub bolts are passed through a pulley 8 having a plurality of circumferential grooves provided on an intermediate horizontal shaft connected to the shaft of a dynamometer 4, a brake drum 9, etc. A connection plate 11 mounted on the brake drum 9 with a plurality of nuts 10, a pulley 13 with an obliquely upward horizontal axis connected to the connection plate 11 via a universal joint 12, and a pulley 13 with an obliquely upward horizontal shaft. 13 and a belt 6a wound around the pulley 8. As shown in FIG. 1, the belt 6a in the power transmission means is connected to pulleys 8,
13 in a V-shape. 1
Reference numeral 4 denotes left and right front and rear support plates whose lower end side is pivotally supported to the intermediate horizontal axis via a bearing, while the other end side is pivotally supported to the diagonally upper horizontal axis via a bearing, and these support plates 14
As shown in FIG. 2, they are provided facing each other on the outside and inside so as to sandwich the belt 6a therebetween. Reference numeral 15 denotes a wheelbase adjusting device which is disposed at the left, right, front and rear in the pit 1 as shown in FIGS. In this embodiment, the wheel base adjusting device 15 has its lower end pivoted on a support 16 installed in the pit 1. A screw rod 17 is used, the upper end of which screws into a male threaded portion protruding from the central outer wall of the support plate 14. 18 is a support plate that supports the power transmission means 6.

In this embodiment, the connecting plate 11 is attached to the brake drum 9, but when the brake device of the vehicle under test 3 is a disc brake, the connecting plate 11 is attached to the disc brake. Further, if the wheels are still attached to the vehicle under test 3, the connection plates 11 are attached to the wheels.

In the above configuration, when setting the vehicle under test 3 directly above the pit 1, for example,
A pit cover plate about the width of a car is prepared, and after the vehicle to be tested is driven onto the pit cover plate, the vehicle to be tested 3 is supported by the support member 2 using jacks or the like, as shown in FIG. In this case, the vehicle under test 3 may be suspended using an appropriate lifting device without using the support member 2. Next, the wheels are removed from the vehicle under test 3, and the connecting plate 11 is attached to the vehicle under test 3 as shown in FIG.
It is connected to each brake drum 9 of. In this case, the adjustment device 1 is adjusted in accordance with the wheelbase of the vehicle under test 3.
Adjust the position of each upper horizontal axis in step 5. After that,
When the engine of the vehicle under test 3 is started, the dynamometer 4 is transmitted from the axle 7 of the vehicle under test 3 via the power transmission means 6.
Thus, the driving force can be extracted directly, so to speak, or the driving force can be applied from the dynamometer 4 to the axle 7 of the vehicle under test 3 via the power transmission means 6. Note that this embodiment is most suitable when the vehicle under test is a four-wheel drive (4WD).

Next, different embodiments of the present invention shown in FIGS. 4 and 5 will be explained. In the description of these embodiments, the same parts as in the above embodiments are given the same reference numerals.

The main differences between the embodiment shown in FIG. 4 and the previous embodiment are a pit 1A and a wheelbase adjustment device 1.
It is 5A. That is, steps 20 for installing the adjusting device 15A are formed in the pit 1A at the front and rear, and an operating rod 21 is used as the adjusting device 15A.
A hydraulic cylinder 22 whose tip end is pivoted to a support plate 14A is used.

The main difference between the embodiment shown in FIG. 5 and the previous embodiment is that the front and rear width of the pit 1B is narrow so as to be optimal when the test vehicle 3B is mainly a 2WD vehicle, and one wheel is fixed appropriately. The point is that no wheelbase adjustment device is provided since it is sufficient to stop the wheel base using the tool 23. Note that even if the test vehicle 3B is a 4WD vehicle, it is possible to perform the test in this embodiment as long as one axle is not used.

"Effects of the Present Invention" As is clear from the above explanation, the present invention has the following effects.

(1) Since the driving force is directly extracted from the axle of the test vehicle using a power transmission means, or the driving force is applied to the axle from a dynamometer, there is no need for a conventional roller device that rotates with the wheels. Therefore, the test apparatus itself can be greatly simplified as a whole.

(2) Since the dynamometer, etc. can be placed directly under the vehicle under test, and as mentioned in (1) above, the device itself can be made smaller, so the vehicle under test can
Even in the case of 4WD, the installation area is equivalent to the size of the vehicle.

(3) If the vehicle under test is a 4WD, there is no need to adjust the wheelbase using a moving trolley device equipped with rollers and a dynamometer, as in conventional examples, and simple members such as screw rods 17 and cylinders 22 can be used. You can adjust the wheelbase using

(4) There is no need for fixing devices to fix the vehicle under test or cooling devices to cool the tires.

(5) Therefore, it can be manufactured at low cost.

[Brief explanation of the drawing]

Figure 1 is a schematic explanatory diagram of the present invention from the front;
The figure is a schematic plan view of the present invention, FIG. 3 is a schematic illustration of the main parts of the present invention, and FIGS. 4 and 5 are different schematic illustrations of the present invention. 1, 1A, 1B... Pit, 2, 2A... Support device, 3, 3A, 3B... Vehicle under test, 4, 4A
...Dynamometer, 5,5B...Flywheel, 6...
... Power transmission means, 7 ... Axle, 8, 13 ... Pulley, 14, 14A ... Support plate, 15, 15A ... Adjustment device, 17 ... Screw rod, 22 ... Cylinder.

Claims (1)

[Scope of utility model registration request] A chassis dynamometer comprising a dynamometer disposed in a pit, and a power transmission means connected at one end to the dynamometer and to a vehicle under test located above the pit at the other end.