JPH0228094B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a side slip measuring device for a vehicle that measures the side slip of a vehicle and adjusts toe-in.

(Prior art) Conventionally, before a vehicle is produced on an assembly line and shipped as a product, various tests such as side slip measurements are conducted. Rather than a continuous assembly line, each independent test device is installed in sequence, and the vehicle is moved in sequence, so measurements and adjustments are essentially made while the vehicle is stationary. The problem is that the processing efficiency is lower than that of an assembly line.

In other words, conventional side slip measurement and toe-in adjustment devices, for example, lock the rear wheels on a fixed station and perform the measurement while rotating the front wheels on a drum tester.
In addition, a vehicle is run on a flat plate installed so that it can move freely, and measurements are taken from the movement of this flat plate (for example, Utility Model Application No. 57-198039, Japanese Patent Application Laid-open No. 57-1980)
160044), but these measurement methods cannot be used on-conveyor, which is a major obstacle to test line automation.

In particular, some vehicles require side slip to be measured for the rear wheels in addition to the front wheels, and in these cases, side slip may have been measured separately for the front and rear wheels and toe-in adjustment performed. , there is a problem that accurate straightness cannot be ensured.

(Object of the Invention) In view of the above circumstances, the present invention has been developed to perform side slip measurement on a conveyor, so that side slip of front and rear wheels can be measured or toe-in adjustment of all wheels can be performed simultaneously while the vehicle is being transported on a conveyor. The object of the present invention is to provide a side slip measuring device.

(Structure of the Invention) The side slip measuring device of the present invention has a rotating roller type side slip for the front wheels and a rear wheel, which is installed at intervals corresponding to the wheel base of the vehicle on an endless slat conveyor laid within a certain section. The present invention is characterized in that a rotating roller of the slip measuring means is interposed, and a driving means is provided for driving the rotating roller within a specific section where the front wheels and rear wheels of the vehicle are mounted on the rotating roller.

(Effects of the Invention) According to the present invention, the endless slat conveyor is provided with rotating roller type side slip measuring means for front wheels and rear wheels, and the front and rear wheels of the vehicle are placed on the rotating rollers of the side slip measuring means. All wheels are rotated by the drive means, and the side slip of the front and rear wheels is simultaneously measured from the amount of lateral movement at that time, and toe-in adjustment is performed based on this. It is efficient because the front and rear wheels of the machine can be measured and adjusted at the same time while the conveyor is being transported.Moreover, since the measurement and adjustment are performed while the front and rear wheels are rotating, accurate straight-line performance can be achieved. It will be done. Furthermore, by implementing on-conveyor technology, measurements and adjustments can be made while being continuously conveyed on the conveyor, eliminating the need to stop the flow of the test line and allowing continuity with vehicle assembly lines before and after, improving processing efficiency. be.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a side slip measuring device for a vehicle, and FIG. 2 is a schematic side view.

Reference numeral 1 denotes an endless slat conveyor laid within a certain section, and a pair of slat conveyors are installed on the left and right at intervals corresponding to the vehicle wheel width.The rear end is supported by an end pulley 2, and the front end is supported by a drive pulley (not shown). It is configured to be supported by and run at a predetermined speed.

In this slat conveyor 1, rotating roller type side slip measuring means 3A, 3B for front wheels and rear wheels are installed at a predetermined interval corresponding to the wheel base of the vehicle C, and these side slip measuring means 3A, 3B moves integrally with the movement of the slat conveyor 1. The rotating rollers 4, 4 of the side slip measuring means 3A, 3B for front wheels and rear wheels face the conveyance surface of the slat conveyor 1 and are spaced at a predetermined interval so as to support the wheels W of the vehicle C in the front and rear. The rotating roller 4 is rotatably driven by an endless driving means 5 installed inside the slat conveyor 1, and is provided so as to be movable in the axial direction (lateral direction). The side slip amount is measured by detecting the amount of lateral movement of the rotating roller 4 as it rotates.
Toe-in adjustment is performed based on this measurement.

The driving means 5 engages with the rotating roller 4 and drives the rotating roller 4 to rotate within a specific section where the front and rear wheels W of the vehicle C are mounted on the slat conveyor 1 (rotating roller 4). A drive chain 6 is provided in an endless manner along the slat conveyor 1 at a lower fixed portion on the transport side of the slat conveyor 1, and the drive chain 6 is driven by a drive motor 7. , the rotating roller 4
As the slat conveyor 1 moves, a chain sprocket 17, which will be described later, is engaged with and linked to the drive chain 6, and is rotationally driven by the drive chain 6 running faster than the running speed of the slat conveyor 1. Ru. The engagement starting portion 6a on the rear end side of the driving chain 6 is elastically provided so as to be able to tilt slightly in the vertical direction, so that the engagement between the two can be reliably performed.

The side slip measuring means 3A and 3B for the front wheels and rear wheels have the same structure, and the detailed structure thereof is shown in FIGS. 3 and 4.

The slat conveyor 1 is formed into an endless type by connecting narrow plates 1a constituting a conveying surface with chain parts 1b on both sides.
A chain sprocket of a drive pulley (not shown) is engaged with the drive pulley and driven at a constant speed. A portion of the plate 1a of the slat conveyor 1 is cut out, and a shaft 8 supporting the rotating roller 4 is fixed to the lower surface of the plate 1a by a bearing 9 so that the rotating roller 4 faces this portion.

The rotating roller 4 is supported by the shaft 8 via a ball slide 10, rotates together with the shaft 8, and is movable in the axial direction. On both sides of the rotating roller 4, springs 11, 11 are respectively compressed between the rotating roller 4 and the bearings 9, 9 via a thrust bearing 12. Brackets 13 are attached to the races on the fixed side of the thrust bearings 12 on both sides of the slat conveyor 1, and a rod 14 connecting the brackets 13 on both sides is guided in the axial direction by a guide 15 fixed to the plate 1a of the slat conveyor 1. Bracket 13 is prevented from rotating. A sliding rod 16a of a position sensor 16 (potentiometer) is fixed to the bracket 13, and the amount of lateral movement of the rotating roller 4 is determined by the position sensor 16.
The detection signal of the position sensor 16 is output to an arithmetic circuit (not shown), and a display shows the side slip amount or whether it is within the allowable range.
Displays whether toe-in adjustment is necessary or not.

Further, a chain sprocket 17 that engages with the drive chain 6 to drive the rotating roller 4 is fixed to one end of the shaft 8.

Further, a fixed side roller 18 is disposed on one side (outside) of each rotating roller 4, 4 of the side slip measuring means 3A, 3B for the front wheels and rear wheels, while a fixed side roller 18 is disposed on the other side (inside). A movable side roller 19 is provided to push the wheel W to center it when necessary.

The moving mechanism of the moving side rollers 19, 19 is the fifth one.
As shown in the figure, a support member 20 to which moving side rollers 19, 19 are attached is attached to a slat conveyor 1.
A pin 22 that can come into contact with a stopper 21 and a rod 24 that can come into sliding contact with an operating cam 23 are implanted in this support member 20 . The pin 22 and rod 24 are connected to the slat conveyor 1.
The rod 24 is slidably supported by a guide member 25 fixed to the rod 24, and the rod 24 is supported by a spring 26.
According to the protrusion direction, that is, the moving side roller 19
is urged in the direction of contacting the wheel W. Further, a roller 24a that contacts the operating cam 23 is installed at the tip of the rod 24, and the contact with the operating cam 23 causes the movable side roller 19 to move in the backward direction against the spring 26.

According to the above embodiment, the vehicle C is carried into the slat conveyor 1, and the front and rear wheels of the vehicle C are placed on the rotating rollers 4, 4 of the side slip measuring means 3A, 3B. is mounted on the slat conveyor 1 and is moved at the running speed of the slat conveyor 1. Along with this movement, the chain sprocket 17 of the rotating roller 4 engages with the driving chain 6 of the driving means 5, and the rotating roller 4 is rotationally driven, whereby the wheels W of the vehicle C riding on the rotating roller 4 are rotated. Rotate. Along with this rotation, side slip occurs due to toe-in, tire pattern, etc., and the rotating roller 4 moves laterally along the shaft 8 due to the reaction force, and the position sensor 16 detects the amount of movement. The side slip of the front and rear wheels of the vehicle C is measured simultaneously.

Although the present invention is capable of measuring the front and rear wheels at the same time, it is also configured so that side slip of only the front or rear wheels can be measured if necessary. In that case, the operating cam 23 corresponding to the rear wheel or front wheel side slip measuring means 3B or 3A that is not being measured is moved, and the rod 24, which is released from contact with the operating cam 23, is connected to the spring 26. As the wheels move due to the urging force of It is something.

The drive means 5 is configured to be able to drive the side slip measuring means 3A for the front wheels and the side slip measuring means 3B for the rear wheels independently, so that the driving speed of the front and rear wheels can be changed or when unnecessary. It may also be stopped.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view showing a side slip measuring device for a vehicle according to an embodiment of the present invention, Fig. 2 is a schematic side view thereof, and Fig. 3 is a detailed side view showing a side slip measuring means partially in section. , Figure 4 is the third
FIG. 5 is a detailed sectional view taken along the line - in FIG. 3. FIG. 5 is a detailed sectional view taken along the line - in FIG. 1... Slut conveyor, 3A, 3B... Side slip measuring means, 4... Rotating roller, 5...
Drive means.

Claims (1)

[Claims] 1 Rotating rollers of rotating roller side slip measuring means for front wheels and rear wheels are installed at intervals corresponding to the wheel base of the vehicle in an endless slat conveyor laid within a certain section, and A driving means for driving the rotating rollers is provided within a specific section where the front wheels and rear wheels are mounted on the rotating rollers, so that side slips of the front wheels and rear wheels can be measured simultaneously on the conveyor. Vehicle side slip measuring device.