JP2598406Y2 - Dynamic balance testing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic balance tester used for measuring a dynamic balance of a work provided with a rotary drive source, and more particularly to an improvement of a mechanism for clamping a work. .

[0002]

2. Description of the Related Art Generally, in a work having a rotary drive source such as a fan for a cooler or a disk drive of a floppy disk, it is necessary to test the dynamic balance.

In a conventional dynamic balance tester used in such a case, after a work is mounted on a work mounting table,
The operator manually manually operates the clamps arranged at a plurality of positions along the circumferential direction on the work mounting table to individually clamp the work on the work mounting table. When the rotation drive source of the work is activated, if the rotation is unbalanced, the vibration frame connected to the work mounting table vibrates according to the unbalance amount, and the vibration amount is detected by the pickup. It has become.

[0004]

However, as in the prior art, the manual operation of a plurality of clamps by an operator individually to clamp the work on the work mounting table is not only time-consuming but also requires a lot of work. The clamping force becomes uneven, the clamping force becomes insufficient, or some clamps are forgotten to be tightened for each clamp. There have been problems such as loosening, making it impossible to measure the dynamic balance, and lack of reliability in the measurement results.

[0005] The present invention has been made in view of the above-mentioned problems, and saves time and effort for clamping a work, and enables uniform and sufficient force to clamp the work.
It is an object to improve the workability of a dynamic balance test.

[0006]

According to the present invention, in order to achieve the above object, there is provided a work mounting table on which a work having a rotary drive source is mounted, and the work mounting table is provided at the center of rotation of the work. It is fixed to the vibrating frame arranged in alignment,
The following configuration is adopted in a dynamic balance tester in which this vibration frame is provided so as to be able to vibrate.

That is, in the present invention, there is provided a clamp means for clamping a work on a work mounting table, and this clamp means comprises a plurality of clamp levers which are engaged and disengaged from the work, and all clamp levers which are engaged with the work. And a clamp lever driving mechanism that simultaneously urges the joint side. Each of the clamp levers is disposed at each of the radial positions divided by the same angle from the rotation center. And are mounted coaxially.

[0008]

In the above configuration, in order to test the dynamic balance of the work, after the work is placed on the work mounting table and the clamp lever driving mechanism constituting the clamping means is activated, the activation of the clamp lever driving mechanism is started. All of the clamp levers are simultaneously urged toward the work engaging side in conjunction with the above, whereby the work is clamped on the work mounting table. Therefore, it is not necessary to operate the clamp lever individually, which saves the labor of the clamp operation, and furthermore, the clamp force is kept constant by the clamp lever driving mechanism, so that the clamp force is insufficient or uneven. There is no.

Further, since the clamp lever and the clamp lever drive mechanism are all disposed coaxially with respect to the rotation center of the work, they do not cause unbalance in the dynamic balance test.

[0010]

FIG. 1 is a side view showing a main part of a dynamic balance tester according to an embodiment of the present invention, and FIG. 2 is a plan view of the tester.

In these figures, reference numeral 1 denotes an entire dynamic balance testing machine, and 2 denotes a work having a rotary drive source such as a motor.
(Fan in this example) Reference numeral 3 denotes a work mounting table on which the work 2 is mounted, and 4 denotes a cylindrical vibration frame.

The workpiece mounting table 3 has a through hole 3a formed at the center thereof so as to coincide with the rotation center O of the workpiece 2.
Are provided, and positioning pins 8 to be fitted into engagement holes formed in advance on the work 2 are detachably provided, and fixed by stoppers 10 so that the tips of the positioning pins 8 protrude from the work table 3. Have been.

On the other hand, the vibrating frame 4 is arranged coaxially with the rotation center O and supported so as to be able to vibrate by a pair of leaf springs 12. A bush 16 is fixed to each lower end.

The vibrating frame 4 and the work table 3 are
The through holes 6 of the work mounting table 3 are integrally connected to each other through a spacer 14.
An annular recess 14a having substantially the same diameter as the inner diameter of the bush 16 is formed, and an annular recess 16a is also formed at the center of the bush 16, and the bottom of each of the annular recesses 14a, 16a is inserted with a piston described later. Holes 14b and 16b are respectively formed.

Reference numeral 20 denotes a clamping means for clamping the work 2 on the work mounting table 3.
Is a plurality of (three in this example) hook-shaped clamp levers 22 which are engaged with and disengaged from the work 2, and each of the clamp levers 22 is linked to all the clamp levers 22 so that each of the clamp levers 22 is engaged with the work 2. And a clamp lever drive mechanism 24 that simultaneously urges the clamp lever.

Each clamp lever 22 is connected to the rotation center O
At the respective radiation positions divided by an equal angle (120 ° in this example) from, it is swingably attached to the peripheral side wall of the work mounting table 3 by the pins 26.

In the clamp lever driving mechanism 24, the air cylinder 30 is fixed to the lower end of the bush 16 via a pair of columns 28, and the inside of the vibration frame 4 and the insertion holes 14b, A connecting rod 32 is provided by vertically penetrating each of the connecting rods 16b, and a lower end of the connecting rod 32 is connected to the air cylinder 30 via a connecting tool 35.
The piston 34 is fixed, and the piston 34 is fitted in the annular recess 14 a of the spacer 14. Further, a driven rod 36 is fixed to the piston 34 with bolts 38,
The driven rod 36 includes the work mounting table 3 and the spacer 14.
Has three arm portions 36a extending radially toward the respective clamp levers 22 through the cutout portions 3b and 14c respectively formed at the front ends of the respective arm portions 36a. It is attached, and a clamp release spring 40 is stretched between the arm portion 36a and the clamp lever 22.

In the above configuration, when performing the dynamic balance test of the work 2, the work 2 is placed on the work mounting table 3 so that the engagement holes formed in advance are engaged with the positioning pins 8. . When the air cylinder 30 constituting the clamping means 20 is activated, the piston 34 fixed to the connecting rod 32 is slid upward, and accordingly, the driven rod 3
As a result, the clamp lever 22 is pressed against the pulling force of the clamp release spring 40 by the pressing force of the push pin 39 attached to the tip of each arm 36a of the driven rod 36. 26, the work 2 is moved to the work table 3
Clamped on.

As described above, since it is not necessary to individually operate the clamp levers 22 only by activating the air cylinder 30, the labor of the clamp operation can be saved, and the clamp force is kept constant by the clamp lever driving mechanism 24. Therefore, the clamping force does not become insufficient or uneven.

On the other hand, when the dynamic balance test of the work 2 is completed, the air cylinder 30 constituting the clamping means 20
Is stopped, the piston 34 fixed to the connecting rod 32 is slid downward, and the driven rod 36 is also moved downward. As a result, each of the clamp levers 22 pulls the clamp release spring 40. Pin 26 by force
Is pivoted in the opposite direction to that of the clamp with respect to the workpiece 2 and is separated from the workpiece 2, so that the clamped state of the workpiece 2 is released.

Further, all the clamp levers 22 and the clamp lever driving mechanism 24 constituting the clamp means 20 are arranged coaxially with respect to the rotation center O of the workpiece 2, so that the clamp lever 20 and the clamp lever drive mechanism 24 are unbalanced with respect to the dynamic balance test. A reliable test result can be obtained without being a factor of balance.

In the above embodiment, the clamp levers 22 are provided at three positions on the work table 3, but more clamp levers can be provided so that the clamp can be performed more reliably.

[0023]

According to the present invention, the work for clamping the work can be omitted, and the work can be clamped with a uniform and sufficient force, so that the workability of the dynamic balance test and the reliability of the test result are improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of a dynamic balance testing machine according to an embodiment of the present invention.

FIG. 2 is a plan view of the dynamic balance tester of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Dynamic balance tester, 2 ... Work (fan), 3 ... Work mounting table, 4 ... Vibration frame, 20 ... Clamp means, 22 ... Clamp lever, 24 ... Clamp lever drive mechanism, O ... Rotation center.

Claims (1)

(57) [Scope of request for utility model registration] 1. A work mounting table on which a work having a rotary drive source is mounted, the work mounting table being fixed to a vibration frame arranged so as to coincide with the rotation center of the work, and the vibration frame being In a dynamic balance tester provided so as to be able to vibrate, a clamp means for clamping a work on a work mounting table is provided, and the clamp means includes a plurality of clamp levers which are disengaged from the work, and all clamp levers. And a clamp lever driving mechanism that simultaneously urges the workpiece engaging side.Each clamp lever is disposed at each radial position divided at an equal angle from the rotation center. A dynamic balance tester characterized by being mounted on a frame coaxially with the rotation center.