JPS5938629A - Dynamic balance tester - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a low-energy, low-noise drive system for dynamically rotating a wheel/tire assembly for dynamic balance testing, and more particularly for dynamic balance testing.

Conventionally, in a moving seat test equipment r1° that rotates a wheel/tire assembly to take balance,
Wheel and tire assemblies have typically been driven at relatively high horsepower and speeds, eg, on the order of /horsepower and 5θ0 rpm, to maintain an adequate signal-to-noise ratio. It has been recognized that the noise of the drives of the type described above must be less than the first root of the rotational speed in order to maintain the necessary signal-to-noise ratio. Furthermore, it has been observed that the signal from the device varies with the square of the wheel speed.

Past practice has been to rotate wheel and tire assemblies on pivoting devices at the relatively high speeds mentioned above. It has now been found that much of the difficulty in obtaining adequate signal-to-noise ratios lies in the use of inelastic drive belts and external tensioning devices acting thereon.

As disclosed herein, in order to provide a number of important advantages, it is possible to reduce the rotation of the tire assembly by a relatively small amount of λθθ (i.e., about θyC of today's equipment). The disclosed force drive system provides a dynamic tester drive that can be reduced to a slow and safe rotational speed, compared to the penetrating motors currently in use. It is possible to use a motor with a horsepower of about 1000 horsepower. This reduction in rotation of 51 degrees and energy typically makes a normal safety hood over a rotating wheel 1.11 times smaller. moreover,
This also eliminates the use of the attached 'J% pulling device which acts on the belt! ;, i : T+ ” - Reduces the noise of not only the drive unit and the electronic equipment by 1°.Finally, the p-axis disclosed here is 1. υ in the view. Separate the motor and the support shaft of the wheel tie by a predetermined distance from each other.
It has the advantage of being able to be centered on 'i, + yu'.

In summary, the type of tension tester described has heretofore been used with inelastic belts which require tensioning devices to act on the surface. The use of this Quizo's powerful drive system is noisy. Therefore, to achieve a suitable signal-to-noise ratio, the rotational speed must be increased. This requires a large motor, and on the other hand, wheels and tires that rotate at high speed are arranged so that they can move smoothly. Requires the use of a safety hood.

In general, in the Bo/F-drive I) Ai tester, the Ho/F-drive
E sword...Equipped with a drive device RF for rotating the tire assembly, and a drive unit ``t'' is one end...
The wheel can be easily removed and the bearing mounted ff'?-μ can be rotated. Useful for supporting) L, one. The r-shaft has a pulley at one end for receiving belt pivoting. The motor that moves the first bump'-ri is driven by the wheels of the first and second boots IJ-, and is connected to the wheels and tires via an IV device on the side of the belt between these two parts. Helps rotate the assembly. The belt device has a modulus of elasticity sufficient to provide a tension of substantially 1° C. in the belt device when stretched between the pulleys and around them;
Know. The two pulleys can rotate -4° about a constant center. Preferably with a belt attached, flh
This person has the characteristic of elastic modulus, and the 7
Wrap the belt around H several years old.

Overall, the sixth improved drive device of the present invention is the sixth improved drive device of the present invention, which is a low energy, low noise test machine. Schiff provides a type of drive system, and a pole that takes people in close contact with it.
Sufficiently reduce the rotational speed of the tires and remove the safety hood while using a small, low-power drive motor.

The movement of the hole 1-hole (1 trial FJ@, apprehension t-1') The elongated drive shaft 11 and the bearing that rotatably supports the drive shaft 11 are designed as block : The bearing includes the device and the bearing housing song alignment sensor 15 (If #me, //. One end of the drive @ 11 is
Wheel/f-ya/r assembly for balance 1
A suitable sensing element 16.17 paired with the immovable support 17. Support the bearing assemblies IJ-12, 13 against the wall.

A suitable mounting base 22 supports the housing 21 and fixes the rotational axis of the shaft 11 by attaching the housing 21 to the base 22 by means of fasteners (such as nuts 23 and bolts 25). do. The device for pivoting @11 includes a drive motor 24 mounted on a mounting base 22.

The drive motor 24 has an output spindle 26 that drives a pulley 27 . The shaft 11 is provided at its end with a shaft IJ-28 which rotates therewith. The two pulleys 27.2B lie substantially in a common plane, and a plurality of drive belts 29.31.32.33 encircle the pulleys and extend between the pulleys. P/L, 129.3
Each of 1 to 33 uses a motor 24 to rotate @11.
When driven by the belts 29.31-33, each of the belts 27.2
81c has sufficient elasticity to be gripped. Preferably, the drive belts have a modulus of elasticity that provides an elongation on the order of .theta.% of their length, so that the tension in these belts derives substantially solely from the belt's own elasticity.

A device for maintaining the belt axially on both pulleys: two grooves 27a, 27b formed around the pulley 27 for engaging each of the belts 29.31-33; 27c and 27d. Sea IJ 28 F, L 7 langes for restriction at its ends 34.
It has 36. Thus, the pulleys 27 and 28 are made on a constant center with a predetermined distance from each other! 9! Do J.

During operation, the drive boops IJ 27 engage relatively elastic belts, so that these belts e and their grooves 27
a to 27d, so that no tension of Pel I from an external source is required. For example, belt 33
When the pulley 27 rotates in the direction of the arrow 37, the force portion 338 is pulled toward the pulley 27.
- The force upper blade part 33b is sent towards the boot I728. At the same time, grasp the lower part 33a (Yob'-') 2B's and rotate it in the direction of the arrow 38.

-) -The above f...possible equipment is a single elastic bell; and f'
) = pj+ -, but it is difficult to use multiple such belts), and its p/L l-
Even if 7 or more of them wear out and break, the R-tsu device can continue to operate. On the same day, at °7, while waiting for delivery of a replacement belt,
There is no need to stop for toilet use.

7C, t, iih of the belt, covering the first part extending between 27° and 28° and the 52nd part.
2. Under the rotation of one of the two pulleys of these belts, the shaft 11 can be rotated without a tensioning device arranged between the two pulleys and acting on the belt. It is readily apparent from the description.

Therefore, the noise of vPJ/ is eliminated, and the rotational speed of the tire assembly 14 is determined by the signal-to-noise ratio f: Smell)i
This can be significantly reduced to about 70% of what was previously believed. As a result, the mobile energy decreases by approximately gθ 6. However, (7) where previously /horsepower motors were required, //horsepower motors are now available.
It is possible to use one box of rice (Z).

:'! ``) I'' - 1, the elasticity F moves pelton)) pulls out virtually all the tension from - Lee ξ and e koyo 1 Double-edged T”
, Zhang Shi device [free support in Shi'2! Driving by hand-”2]
.

[Brief explanation of drawings]

Drawings (parts of which may be removed according to the present invention)
i:σ1:t! ;! Mouth ζshi 1-/iノru. 10... Hole F" I Q 5) Ai test tq carrier 11... Drive shaft i2.13 ・@Receiving assembly 14 Simple 21 ・Hamster Lens 22...Installation base 2'/, 213...N"1-ri 111l/

Claims (1)

[Claims] In a motion device for a wheel/tire assembly of a testing machine that controls the movement of a wheel, the drive device
A drive shaft, a bearing device for rotatably supporting the drive shaft, and one end portion of the drive shaft slidable so as to easily and removably receive a balancing wheel, which rotates together with the drive shaft. It is fixed like 7'j g(l/f
- and the λ-th pulley, which is rotated by the motor, for a predetermined distance l? a device for attaching the fi/th and λ-th pulleys with four pulleys separated by %, and a drive belt device hooked on the first, second, and second pulleys and extending between them; , a moving seat tester having a modulus of elasticity sufficient to provide substantially all of the tensioning action of the belt when applied by the motor.