JPH04310838A - Machine for measuring dynamic balance of tire - Google Patents

Abstract

PURPOSE:To obtain a dynamic balance measuring machine of a tire where a tire rim can be mounted and removed easily and the part life is long. CONSTITUTION:A taper sleeve 51 which can be expanded and contracted in diameter direction is provided at an engagement portion of an upper rim 1 and a lower rim 2 of a tire 300 and an engagement according to a taper sleeve 51 is loosened at the time of engagement and mounting and removal of the upper and lower rims. It is so operated that the engagement by the taper sleeve 51 is clamped during measurement of dynamic balance of the tire after the upper and lower rims 1 and 2 are fitted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting structure for upper and lower rims applied to a tire dynamic balance measuring device.

0002

BACKGROUND ART In FIG. 5, 1 is an upper rim, 1a is an upper rim and one core rod, 2 is a lower rim, 2a is a lower rim and a spindle, 3 is a bearing (two upper and lower pieces), and 4 is a load cell (two upper and lower), 5 is a frame, 6 is a motor (preferably a servo motor), 7 is a belt, 8 is a shaft rotation angle sensor,
9 is an air cylinder for unlocking (fixed to the frame), 10 is a roller table, 11 is a spring (to hold the lock), 20
1 is a retaining hook of the upper rim 1 belonging to the lower rim 2, 202
is a rod for operating the hook 201 belonging to the lower rim 2, B is an air passage (for tire internal pressure), 203 is a rotary joint (for tire internal pressure), 101 is an upstream conveyor, 102 is a downstream conveyor, 103 is an upper rim loader/ Unloader (
Only the clamp is shown), and 300 is a tire.

Next, the operation of this device will be explained. When the upper rim 1 and the roller table 10 are both in the upper position (the state shown by the chain line), the tire 300 is carried in from the conveyor 101. Although not shown, the roller table 10 is equipped with a stopper that stops the tire at the center of the rim, and the stopper stops the tire.

In the cylinder 9, the rod is extended and compresses the spring 11, the rod 202 is raised, and the hook 201 is unlocked. The roller table 10 is lowered and the tire 300 is placed on the lower rim 2. The upper rim 1 is lowered by the upper rim loader/unloader 103, and the core rod 1a is inserted into the spindle 2a. The rod of the cylinder 9 is lowered, the rod 202 is lowered, and the hook 201 lowers the core rod 1.
Grasp the tip of a and lock it.

[0005] Rotary joint 203 and air passage B
Air is filled into the tire via the Upper rim loader/
The unloader 103 releases the upper rim 1 and rises to the state shown in FIG. The spindle 2a is rotationally driven by the motor 6 and the belt 7, and the rotating parts such as the rims 1, 2 and the tire 300 are rotated.The load cell 4 measures the unbalance amount, and the sensor 8 measures the unbalance angular position. Naturally, it is equipped with an amplifier, computer, etc. When the measurement is completed, the tire internal pressure is released and the motor is stopped so that the unbalance angle position is in a predetermined direction of the machine (for example, downstream). Release the internal pressure, unlock, raise the upper rim, raise the roller table, and move the tire 300 to the downstream conveyor 102.
is sent out (the delivery mechanism is not shown).

[0006]

SUMMARY OF THE INVENTION The above-mentioned prior art has the following problems. The gap in part A in Figure 5 is 5/100
If it is more than mm, the measurement accuracy will be poor, and if it is less than 2/100 mm, the frequency of machine stoppages due to fitting errors will increase. Furthermore, since only a narrow gap can be used, the life of the parts is shortened due to sliding wear during attachment and detachment, and the effort of calibrating the device imbalance when replacing it cannot be ignored.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a tire dynamic balance measuring machine that is easy to operate and has a long component life.

[0008]

Means for Solving the Problems As shown in FIG. 1, a tapered sleeve 51 is provided at the fitting portion of the upper rim and the lower rim so that it can expand and contract in the radial direction.

[0009]

[Function] When attaching and detaching the upper and lower rims, taper sleeve 51
Press down and expand the diameter to increase the gap, making it easier to raise and lower the upper and lower rims. When measuring after the upper and lower rims are fitted, the tapered sleeve 51 is pulled up and reduced in diameter to eliminate the gap between the rotating shafts, thereby improving measurement accuracy.

0010

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the figure, 1 is the upper rim, 1a is the upper rim and one core rod, 2 is the lower rim, 2a is the lower rim and one spindle,
3 is a bearing (upper and lower 2 pieces), 4 is a load cell (upper and lower 2 pieces)
5), 5 is a frame, 6 is a motor (preferably a servo motor), 7 is a belt, 8 is a shaft rotation angle sensor, 9 is an unlocking air cylinder (fixed to the frame), 10 is a roller table, 11 is a spring (locking 301 is a retaining hook for the upper rim 1 belonging to the lower rim 2, 302 is the lower rim 2
, B is the air passageway (for tire internal pressure), 203 is the rotary joint (for tire internal pressure), 101 is the upstream conveyor, 102 is the downstream conveyor, 103 is the upper rim loader/unloader (clamp only). ), 300 is a tire.

The above-mentioned member has the same structure and function as the prior art shown in FIG. 52 is a tapered sleeve newly provided according to the present invention, which has a plurality of slits 51a in the axial direction, and its diameter can be expanded or contracted by moving it in the axial direction along the tapered hole provided in the spindle 2a. . The upper end of the hook operating rod 302 is formed into a cylindrical shape, and an annular groove 30 in which the flange portion 51b at the lower end of the tapered sleeve 51 engages is formed on the inner periphery of the upper end of this cylindrical portion.
2a is provided.

[0012] Also, a pin 301 serves as a fulcrum of the hook 301.
Both ends of a are fixed to the lower rim spindle 2a through long holes 301b cut in the cylindrical wall of the hook operating rod 302, so the vertical movement of the hook operating rod 302 is not restricted. When attaching or detaching upper rim 1, use rod 3.
02 descends to unlock the hook 301 and open the tapered sleeve 51 (the state shown in FIG. 4). When measuring the tire dynamic balance, raise the rod 302 and attach the hook 3.
01, and grip the upper and lower rim fitting parts with the tapered sleeve 51 without any gaps (state shown in FIG. 3).

The difference from FIG. 5 is that the tapered sleeve 51
In order to match the operating direction of the rod 302 with the locking/unlocking direction of the hook 301, the locking/unlocking direction of the rod 302 is reversed. Furthermore, the shape of the hook 301 and the locking/unlocking operating portion (A in FIG. 1 and C in FIG. 5) are different, and in FIG. 1, a driving portion A of the tapered sleeve 51 is newly provided. Reference numeral 52 denotes an air cylinder for pushing up the rod, and the capacity of the spring 11, the air cylinder 9 for pushing down the rod, etc. needs to be commensurate with the air cylinder 52 for pushing up the rod.

A description of the operation of the present device will be omitted since it is substantially the same as the conventional device except for the above-mentioned structural differences.

[0015]

Effects of the Invention The tire dynamic balance measuring device according to the present invention is provided with a tapered sleeve that can expand and contract in the radial direction at the fitting portion of the upper and lower rims of the tire, and when the upper and lower rims are fitted and removed, the tapered sleeve By loosening the fitting by the tapered sleeve and tightening the fitting by the tapered sleeve during dynamic balance measurement of the tire after fitting the upper and lower rims, the following effects are achieved.

In the case of the conventional upper and lower rim loose fitting method,
There were problems such as poor operation if the gap was small, poor accuracy if the gap was large, narrow allowable range of the gap, and short life due to wear, but with the present invention, there is no malfunction in the attachment/detachment operation.
Accuracy is improved, and even if parts are slightly worn, precision does not deteriorate and the lifespan is extended.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the overall configuration of an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the tapered sleeve shown in FIG. 1.

FIG. 3 is a side view showing the tapered sleeve in a reduced diameter state.

FIG. 4 is a side view showing the tapered sleeve in an enlarged diameter state.

FIG. 5 is a side view showing the overall configuration of a conventional device.

[Explanation of symbols]

1 Upper rim 1a Upper rim core rod 2 Lower rim 2a Lower rim spindle 4 Load cell 8 Shaft rotation angle sensor 51 Taper sleeve 52 Rod lifting air cylinder 300 Tire 301 Retaining hook 302 Rod for hook operation

Claims (1)

[Claims] [Claim 1] A tapered sleeve that can expand and contract in the radial direction is provided at the fitting portion of the upper and lower rims of the tire, and when fitting and removing the upper and lower rims, the fitting by the tapered sleeve is loosened and the upper and lower rims are fitted. 1. A tire dynamic balance measuring machine, characterized in that the fitting by the tapered sleeve is tightened during tire dynamic balance measurement after the tire dynamic balance measurement.