JP2003004576A - Dynamic balancing tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide small equipment of a dynamic balancing tester for a propeller shaft. SOLUTION: A motor 25 driving a rotating spindle 24 is disposed on a vibrating block 22 in at least one trestle 20. The motor is linked to the rotating spindle 24 through a belt 27, and the rotating spindle 24 is rotated by the motor 25.

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, and more particularly to a dynamic balance tester for measuring the dynamic balance of a propeller shaft of an automobile.

[0002]

2. Description of the Related Art FIG. 1 shows a front view of an example of a propeller shaft dynamic balance tester, and FIG. 2 shows a plan view thereof.
Referring to FIGS. 1 and 2, the propeller shaft dynamic balance tester has a pair of pedestals 2 and 3, which are a left pedestal 2 and a right pedestal 3 arranged on a bed 1. The pedestal 2 includes a vibrating frame 4, a rotary spindle 5 provided on the vibrating frame 4,
A chucking device 6 provided at the tip of the rotary spindle 5 is included. A drive shaft 8 is connected to the rotating main shaft 5 by a universal joint 7. A motor 9 is arranged on the inner side of the drive shaft 8, and the rotational force of the motor 9 is given to the drive shaft 8 via the belt 10 to rotate the drive shaft 8.

The right pedestal 3 also has the same structure as the left pedestal 2, and includes a vibrating frame 11, a rotary spindle 12, and a chucking device 13.
Have. A drive shaft 14 is connected to the rotary main shaft 12, and the drive shaft 14 is arranged on the back side of the bed 1 via a belt 15 and is rotated by a motor 16. When performing the dynamic balance test of the propeller shaft, the left end portion of the propeller shaft 17 is held by the chucking device 6 and the right end portion of the propeller shaft 17 is held by the chucking device 13 as shown by the chain line in FIG. Retained. that time,
The right pedestal 3 is movable in the left-right direction on the bed 1 according to the length of the propeller shaft 17 to be subjected to the dynamic balance test. That is, by rotating the handle 18, the entire right gantry 3 (the entire right gantry 3 including the vibrating frame 11, the rotary main shaft 12, and the chucking device 13) can be displaced to the predetermined position in the left-right direction.

The rotating main shaft 12 and the drive shaft 14 are connected by a universal joint or other connecting member 19 in a state where the right frame 3 is set at a predetermined position. Then, in this state, the drive shaft 8 is rotated by the motor 9 via the belt 10, whereby the rotary main shaft 5 is rotated and the propeller shaft 17 held by the chucking device 6 is rotated.
Is rotated in a predetermined direction at a predetermined measuring speed. In this way, the left gantry 2 side operates as a main drive unit.

On the other hand, the right gantry 3 side operates as a sub drive unit. More specifically, the rotational force of the motor 16 is the belt 1
5 is applied to the drive shaft 14 to rotate the rotary main shaft 12. In this case, the rotation speed of the rotary main shaft 12 is slightly lower than the rotation speed of the left rotary main shaft 5, and is rotated in the same direction as the rotary main shaft 5. As a result, a constant torque is applied to the propeller shaft 17 during the dynamic balance test. The reason for this is the propeller shaft 1
No. 7 has an intermediate slide mechanism (constituted by an involute spline) at the center, so that the rattling of this slide does not adversely affect measurement and correction. That is, this is a measurement technique that utilizes the action of the slide portion being aligned by the torque load.

[0006]

FIG. 3 is a side view showing the positional relationship between the right pedestal 3, the motor 16 and the belt 15 in the dynamic balance testing machine shown in FIGS. As shown in FIG. 3, in the conventional configuration, a motor 16 is arranged in the back of the gantry 3, and the rotational force of the motor 16 is transmitted to the rotary main shaft 12 of the gantry 3 by the belt 15. As a result, the mechanical structure is complicated, and the belt 15 may affect the numerical value of the imbalance measurement.

The present invention has been made to solve such a problem. An object of the present invention is to provide a structure that can realize downsizing of the device.

[0008]

The invention according to claim 1 has a pair of left and right mounts, and each mount has:
In a dynamic balance testing machine provided with a vibrating frame and a rotary spindle for attaching an end portion of a workpiece to be subjected to a dynamic balance test provided in the vibrating frame, at least one cradle is
In the dynamic balance testing machine, a driving device for driving the rotating main shaft is attached to a vibrating frame.

According to a second aspect of the present invention, the workpiece is a propeller shaft for an automobile and has an intermediate slide mechanism so that a certain torque is applied to the slide mechanism of the propeller shaft during a dynamic balance test. The dynamic balance testing machine is characterized in that the structure of claim 1 is adopted in a frame different from the main drive side frame. According to a third aspect of the present invention, in both mounts, a drive device for driving the rotary main shaft is attached to the vibrating frame, and one drive device is a main drive side, and the rotary main shaft is rotated at a predetermined measurement rotational speed. The other driving device, as the sub-driving side, rotates the rotating main shaft at a lower rotation speed than the rotating main shaft of the one gantry, whereby a workpiece with both ends attached to both rotating main shafts. The dynamic balance testing machine according to claim 1, wherein a constant torque is applied to the.

According to the structure of claim 1, at least one of the mounts has the drive device for driving the rotary spindle attached to the vibrating frame, so that at the time of the dynamic balance test,
The drive device vibrates together with the vibrating frame. Therefore, as compared with the conventional configuration in which the drive device (motor) is fixedly arranged and the rotational force is transmitted to the rotating main shaft attached to the vibrating frame via the belt, the tension force of the belt is higher. There is no problem such as affecting the vibration of the vibrating frame.

Further, since the drive device is attached to the vibrating frame, the size of the entire device can be reduced as compared with the case where the drive device is fixedly arranged at a position different from the vibrating frame.
In the dynamic balance tester for propeller shafts, the propeller shaft is normally rotated by the pedestal on the main drive side, as described in the section of the prior art. Rotate the propeller shaft at low speed. This is because a propeller shaft having an intermediate slide mechanism needs to apply a certain torque so that the rattling of the slide portion does not adversely affect the measurement and correction accuracy.

For this reason, since the driving device may be small in the sub-driving frame, it is easy to adopt the structure of claim 1, that is, the structure in which the driving device is attached to the vibrating frame. Further, as in claim 3, the configuration of claim 1 may be adopted for both the pair of left and right mounts. In this case, the dynamic balance testing machine as a whole can be downsized and the manufacturing cost can be reduced.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 is a side view for explaining the configuration of the mount of the dynamic balance testing machine according to the embodiment of the present invention. The gantry 20 according to this embodiment includes a fixed block 21 attached to a bed (not shown), a vibration block 22 provided on an upper portion of the fixed block 21, and a leaf spring 23 connecting the fixed block 21 and the vibration block 22. Included, which acts as a vibrating frame.

The vibration block 22 is provided with a rotary main shaft 24. The feature of this embodiment is that the vibration block 22
The motor 25 is attached to the. A pulley 27 is connected to a rotary shaft 26 of the motor 25, and the pulley 2
A belt 27 is stretched between the rotating shaft 7 and the rotary shaft 2.
Therefore, the rotary main shaft 24 is rotated by the motor 25 via the belt 27. By arranging the motor 25 on the vibration block 22 as described above, the structure of the gantry can be downsized, and the downsizing of the dynamic balance testing machine can be realized.

In the conventional propeller shaft dynamic balance tester described with reference to FIG. 1, the configuration shown in FIG. 4 can be adopted in place of the configuration of the right pedestal 3, the motor 16 and the belt 15 attached thereto. . Further, the configuration on the main drive side including the left pedestal 2, the motor 9, the belt 10 and the like in the propeller shaft dynamic balance tester shown in FIG. 1 may be replaced with the configuration shown in FIG.

If the structure shown in FIG. 4 is adopted, the effect of the tension force of the driving belt 27 does not affect the vibration in the vibrating frame, and the dynamic balance test of the propeller shaft can be performed more accurately. Further, the mechanical device can be downsized, and the manufacturing cost can be reduced. The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a conventional dynamic balance tester for propeller shafts.

FIG. 2 is a plan view showing an example of a conventional dynamic balance tester for propeller shafts.

FIG. 3 is a side view for explaining the configuration of a pedestal in a conventional propeller shaft dynamic balance tester.

FIG. 4 is a side view for explaining the configuration of the mount for the dynamic balance test for the propeller shaft according to the embodiment of the present invention.

[Explanation of symbols]

20 frame (vibration frame) 21 Fixed block 22 Vibration block 23 leaf spring 24 rotating spindle 25 motor 27 belts

Continued front page    (72) Inventor Kinjiro Takeda             1-24-3 Miyata-cho, Takatsuki-shi, Osaka Stocks             Company Nagahama Works F-term (reference) 2G021 AB06 AC11 AF03 AF08

Claims (3)

[Claims] 1. A dynamic balance having a pair of left and right mounts, each of which is provided with a vibrating frame and a rotary main shaft to which an end of a workpiece for dynamic balance testing mounted on the vibrating frame is attached. In the test machine, at least one of the mounts has a drive device for driving the rotary spindle attached to a vibrating frame, which is a dynamic balance test machine. 2. The work piece is a propeller shaft for an automobile and has an intermediate slide mechanism, and a pedestal on the main drive side so that a certain torque is applied to the slide mechanism of the propeller shaft during a dynamic balance test. A dynamic balance testing machine, wherein the structure according to claim 1 is employed in a frame different from the above. 3. In both of the mounts, a drive device for driving the rotary main shaft is attached to a vibrating frame, and one drive device is a main drive side and rotates the rotary main shaft at a predetermined measurement rotational speed. On the other hand, the other driving device, as the sub-driving side, rotates the rotary spindle at a lower rotational speed than the rotary spindle of one of the gantry, whereby a fixed work piece with both ends attached to both rotary spindles is provided. The dynamic balance testing machine according to claim 1, wherein a torque is applied.