JPH0725658Y2 - Power transmission system test equipment for four-wheel drive vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a power transmission system testing device for a four-wheel drive vehicle, which independently tests a power transmission mechanism such as a transmission and a transfer of an automobile. .

(Conventional Technology) As a conventional technology, there is a structure shown in FIG.

That is, 1 is a four-wheel drive type power transmission system testing apparatus for an automobile, in which the front roller 4 and the rear roller 3 are made to correspond to the wheel bases of the front and rear wheels of the vehicle. And the rear shaft 5 are fixedly supported, and the front shaft 4 and the rear shaft 5 have a dynamometer 6 and a flywheel 7 respectively.
There is a structure in which 7 is connected and the front shaft 4 and the rear shaft 5 are synchronously connected by a gear mechanism 8.

(Problems to be solved by the invention) Since the above-mentioned conventional one has four rollers corresponding to the front and rear wheels of the automobile, when testing the power transmission mechanism for a four-wheel drive vehicle, The power transmission mechanism has to be mounted on a completed vehicle or a simulated vehicle body formed to have a size equivalent to that of the completed vehicle, which results in an increase in equipment cost and an increase in installation space.

It is an object of the present invention to obtain a new power transmission system test apparatus for a four-wheel drive vehicle that solves the above-mentioned drawbacks.

(Means for Solving the Problems) The present invention is configured as follows in order to achieve the above object.

That is, large-diameter rollers, to which a dynamometer and a flywheel are connected, are provided so as to be spaced apart from each other and coaxial with each other, and a wheel support shaft for supporting a wheel is arranged parallel to the roller to rotatably support the wheel support shaft. Supporting mechanisms for moving the shafts in the contact and separation directions with respect to the outer peripheral surface of the rollers are provided on both sides in the radial direction of the rollers so as to face each other, and the rollers are connected to the engine and the output ends are branched in two directions. A power transmission mechanism is provided, and each output end of the power transmission is connected to each wheel support shaft.

(Operation) Since the present invention is configured as described above, when the rear wheels and the front wheels are attached to the respective wheel support shafts and the respective support mechanisms are operated in the respective roller directions, the rear wheels and the front wheels are separated from each other. The outer peripheral surface of each roller comes into contact from both sides in the radial direction.

Then, by connecting each output end of the power transmission mechanism to each of the wheel support shafts, the power transmission mechanism can be tested.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

In the drawings, FIG. 1 is a schematic plan view showing an embodiment of the present invention, and FIG. 2 is a side view thereof.

In FIG. 2, 9 is a pit, and a base 10 is installed at the bottom of this pit 9.

A leg 11 is erected and fixed to the base 10, and two large-diameter rollers 13, 13 are rotatably supported on the upper portion of the leg 11 via a rotary shaft 12, 12.

As shown in FIG. 1, the rollers 13 and 13 are arranged coaxially with being separated from each other, and a dynamometer is provided at the outer ends of the respective rotary shafts 12 and 12 via a gear mechanism 16 including a gear and a chain. 14 and flywheel 15 are connected in parallel.

Four sets of support mechanisms 17 ... Are provided in the radial direction of the rollers 13, 13, that is, on the left and right sides.

The support mechanisms 17 ... Have substantially the same structure, and a pair of left parts of them will be described with reference to FIG.

That is, the movable table 18 which is moved and adjusted in the left-right direction by the moving device 27 is placed on the base 10, and the lower end portion of the arm 19 bent in an inverted L shape is attached to the right end portion of the movable table 18 by the pin 19a. The upper end of the arm 19 is supported by a spring device 20 so that the upper end of the arm 19 is supported by a spring device 20, and a bearing 25 is arranged in parallel with the rotation axis of the roller 13 at the bent portion of the arm 19.

The spring device 20 has a threaded rod 21 pinned to the left end of the movable table 18.
22 so as to be swingable left and right, and connected to the screw rod 21 from the lower side thereof by a lower spring bearing 21a, a coil spring 23, and an upper spring bearing 2
1b, the load sensor 24 is inserted and inserted, and the swing end of the arm 19 is brought into contact with the upper surface of the load sensor 24.

The lower spring receiver 21a is adapted to be screwed into the screw rod 21 to set the spring load of the coil spring 23.

In the moving device 27, the screw shaft 28 is extended in the left-right direction and screwed to the movable base 18 described above to rotatably support the left and right end portions of the base 10 on the left end portion of the screw shaft 28. A motor 29 with a worm speed reducer is connected, and the movable base 18 is moved left and right via a screw shaft 28 by driving the motor 29 forward and backward.

The wheel support shaft 26 is rotatably fitted in the bearing 25 described above.
The wheel support shaft 26 has its end exposed from the bearing 25, and the wheel W (W1, W2) is fitted and fixed to this exposed portion.

In FIG. 2, 30 is a blower that cools the contact portion between the roller 13 and the wheel W, 31 is a pit cover that covers both sides of the pit 9,
Reference numeral 32 is a roller cover fixedly supported by the frame and covering the upper portion of the roller 13, and 33 is an openable / closable wheel cover covering the upper portion of the wheel W.

Next, the manner of use of the above embodiment will be described.

First, the rear wheels W1 and W1 and the front wheels W2 and W2 are attached to the left and right wheel support shafts 26, respectively.

Next, the motors 29, 29 rotate the screw shafts 28, 28 in a predetermined direction to move the movable bases 18, 18 in the direction of the rollers 13, and the rear wheels W1, W1 and front wheels W2, W2
W2 is brought into contact with the outer peripheral surface of the roller 13.

In this case, the angles θ1 and θ2 between the vertical line passing through the pins 19a and 19a and the line connecting the contacts P1 and P2 contacting the rollers 13 of the rear and front wheels W1 and W2 and the pins 19a and 19a are predetermined values. Set as follows.

That is, the angle θ1 on the rear side (left side in FIG. 2) and the angle θ2 on the front side are as shown in FIG.
50 rear and front wheels W1 and W2 grounding points T1 and T2 and mounted vehicles
The angle between the straight line connecting the center of gravity G of 50 and the ground is set to be approximately equal to θ1 and θ2.

Next, operate the lower spring receivers 21a and 21a of the spring device 20,
Adjust the compressive force of the coil spring 23 to adjust the rear and front wheels W1.
The pressure load on the roller 13 of W2 is set to be substantially equal to the load of the rear and front wheels W1 and W2 of the mounting vehicle 50 on the ground.

In this state, as shown in FIG. 1, a power transmission mechanism 36 for a four-wheel drive vehicle is connected to each wheel support shaft 26 as follows.

That is, the output shaft of the transmission 37, which is connected to the engine 35 via a clutch (not shown), is
It is branched back and forth by 38, and the rear propeller shaft 39 and the front propeller shaft 40 of the mounted vehicle are attached to each of the branched shafts.
The left differential and the right are extended and connected, and the rear differential 41 and the front differential 42 are connected to these.

Further, the rear wheel 41 (output end) and the front axle 44 are attached to the output shafts of the rear differential 41 and the front differential 42.
(Output end) is connected. And the above rear wheel 43 and front axle
The ends of 44 are connected to the wheel support shafts 26, 26 described above.

As a result, when the engine 35 is started, the output is the power transmission mechanism 36, the rear wheels W1 and W1, the front wheels W2 and W.
2. It is transmitted to the flywheel 15 and the dynamometer 14 via the roller 13, and the predetermined performance of the power transmission mechanism section 36 can be tested.

When the present invention is used in a two-wheel drive vehicle that does not have the front differential 42, for example, the front side, that is, the right side moving device 27 is stopped, and only the left side moving device 27 is described above. Try to operate it as required.

(Effects of the Invention) As is apparent from the above description, the present invention is provided with the support mechanism that is moved in the roller direction on both sides of the roller in the radial direction, and the support mechanism is provided with the wheel support shafts that support the wheels. Since the output ends of the power transmission mechanism arranged between the rollers are connected to the wheel support shaft, the power transmission mechanism can be tested without requiring a completed vehicle or a simulated vehicle body. This has the effect of reducing the equipment cost and the installation space.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a schematic plan view showing a conventional example, and FIG. 4 is a center of gravity of a mounted vehicle and ground contact points of front and rear wheels. It is explanatory drawing which shows the straight line which connects and the angle state with the ground. 9: pit, 10: base, 11: leg, 12: rotating shaft, 13: roller,
14: dynamometer, 15: flywheel, 16: gear mechanism, 17: support mechanism, 18: movable base, 19: arm, 19a: pin, 20: spring device, 21: screw rod, 21a: lower spring support, 21b : Upper spring receiver, 22: Pin, 23: Coil spring, 24: Load sensor, 25: Bearing, 26: Wheel support shaft, 27: Moving device, 28: Screw shaft, 29: Motor, 30: Blower, 31: Pit Cover, 32: roller cover, 3
3: Wheel cover, 35: Engine, 36: Power transmission mechanism section, 37:
Transmission, 38: Transfer, 39: Rear propeller shaft, 40: Front propeller shaft, 41: Rear differential, 42: Front differential, 43: Rear axle (output end), 44: Front axle (output end), 50: Mounted car, W: Wheel.

Claims (1)

[Scope of utility model registration request] 1. A large-diameter roller, to which a dynamometer and a flywheel are connected, is provided so as to be spaced apart from each other and coaxial with each other, and a wheel support shaft for supporting a wheel is rotatably supported by being arranged in parallel with the roller. Supporting mechanisms for moving the wheel support shafts in the contact and separation directions with respect to the outer peripheral surface of the rollers are provided on both sides in the radial direction of the rollers so as to face each other, and the rollers are connected to the engine and the output ends are bidirectional. A test apparatus for a power transmission system for a four-wheel drive vehicle, characterized in that a branched power transmission mechanism section is provided, and each output end of the power transmission mechanism section is connected to each wheel support shaft.