JP4684475B2 - Dynamic balance testing machine for propeller shaft - Google Patents

Description

[0001]
BACKGROUND 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]
[Prior art]
FIG. 1 shows a front view of an example of a propeller shaft dynamic balance testing machine, and FIG. 2 shows a plan view thereof.
Referring to FIGS. 1 and 2, the propeller shaft dynamic balance testing machine has a pair of mounts 2 and 3, a left mount 2 and a right mount 3 disposed on a bed 1.
The gantry 2 includes a vibration frame 4, a rotation main shaft 5 provided in the vibration frame 4, and a chucking device 6 provided at the tip of the rotation main shaft 5. A drive shaft 8 is connected to the rotation main shaft 5 by a universal joint 7. A motor 9 is disposed on the back side of the drive shaft 8, and the rotational force of the motor 9 is applied to the drive shaft 8 via the belt 10 to rotate the drive shaft 8.
[0003]
The right gantry 3 has the same configuration as the left gantry 2, and includes a vibration frame 11, a rotation main shaft 12, and a chucking device 13. A driving shaft 14 is connected to the rotating main shaft 12, and the driving shaft 14 is disposed on the back side of the bed 1 via a belt 15 and is rotated by a motor 16.
When performing a dynamic balance test of the propeller shaft, as shown by a one-dot chain line in FIG. Retained. At this time, the right gantry 3 can move in the left-right direction on the bed 1 in accordance with the length of the propeller shaft 17 that performs the dynamic balance test. That is, by rotating the handle 18, the entire right frame 3 (the entire right frame 3 including the vibration frame 11, the rotation main shaft 12 and the chucking device 13) can be displaced to a predetermined position in the left-right direction.
[0004]
In addition, the rotation main shaft 12 and the drive shaft 14 are connected by a universal joint or other connection tool 19 in a state where the right frame 3 is set at a predetermined position.
In this state, the drive shaft 8 is rotated by the motor 9 via the belt 10, whereby the rotation main shaft 5 is rotated, and the propeller shaft 17 held by the chucking device 6 is predetermined in a predetermined direction. Rotated at the measuring speed. Thus, the left gantry 2 side operates as a main drive unit.
[0005]
On the other hand, the right gantry 3 side operates as a sub-driving unit. More specifically, the rotational force of the motor 16 is applied to the drive shaft 14 via the belt 15 to rotate the rotary main shaft 12. In this case, the rotation speed of the rotation spindle 12 is rotated in the same direction as the rotation spindle 5 at a slightly lower rotation speed than the rotation speed of the left rotation spindle 5. As a result, a certain torque is applied to the propeller shaft 17 during the dynamic balance test. The reason for this is that the propeller shaft 17 has an intermediate slide mechanism (configured by an involute spline) at the center, so that rattling of the slide does not adversely affect measurement and correction. . In other words, this is a measurement technique that uses the effect that the slide portion is aligned by torque load.
[0006]
[Problems to be solved by the invention]
FIG. 3 is a side view showing the positional relationship among the right gantry 3, the motor 16 and the belt 15 in the dynamic balance testing machine shown in FIGS. 1 and 2. As shown in FIG. 3, the conventional configuration is a configuration in which a motor 16 is disposed at the back of the gantry 3, and the rotational force of the motor 16 is transmitted to the rotary spindle 12 of the gantry 3 by a belt 15. For this reason, there is a problem that the mechanical structure is complicated and the belt 15 may affect the numerical value of the unbalance measurement.
[0007]
The present invention has been made to solve such problems.
An object of the present invention is to provide a configuration capable of realizing downsizing of the apparatus.
[0008]
[Means for Solving the Problems and Effects of the Invention]
The invention according to claim 1 is a dynamic balance testing machine in which a constant torque is applied to a propeller shaft during a dynamic balance test with respect to a propeller shaft for an automobile, and has a pair of left and right mounts. In a dynamic balance testing machine provided with a separate vibration frame and a rotation main shaft to which an end of a propeller shaft for performing a dynamic balance test provided on the vibration frame is provided, both of the above-mentioned each A driving device for driving the rotation main shaft is attached to the vibration frame of each gantry. One driving device is used as a main driving side to rotate the rotation main shaft at a predetermined measurement rotational speed, and the other driving device is a sub driving device. As the drive side, the rotating main shaft is rotated at a lower rotational speed than the rotating main shaft of one of the gantry, so that the propeller shaft with both ends attached to both rotating main shafts Characterized in that it is subjected to a constant torque, a dynamic balancing machine for propeller shafts.
[0010]
According to the configuration of the first aspect, since the drive device for driving the rotary main shaft is attached to the vibration frame in at least one of the mounts, the drive device vibrates together with the vibration frame during the dynamic balance test. For this reason, the driving force (motor) is fixedly arranged as in the prior art, and the tension force of the belt is smaller than the configuration in which the rotational force is transmitted to the rotating main shaft attached to the vibration frame via the belt. There are no problems such as affecting the vibration of the vibration frame.
[0011]
In addition, since the drive device is attached to the vibration frame, the overall configuration of the device can be reduced as compared with the case where the drive device is fixedly arranged at a position different from the vibration frame.
In the dynamic balance testing machine for the propeller shaft, as explained in the section of the prior art, the propeller shaft is usually rotated by the main drive side frame, and the sub drive side frame is slightly faster than the main drive side rotation speed. Rotate the propeller shaft at low speed. This is because, among propeller shafts having an intermediate slide mechanism, it is necessary to apply a constant torque so that the rattling of the slide portion does not adversely affect the measurement and correction accuracy.
[0012]
Therefore, in the secondary drive side of the gantry, the drive from may be of small size, easy to adopt a structure of attaching the drive unit to the vibration frame.
Furthermore, for both the left and right pair of frame adopts the configuration of attaching the drive unit to the vibration frame. Therefore , the whole dynamic balance testing machine can be reduced in size, and the manufacturing cost can be reduced.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 4 is a side view for explaining the configuration of the gantry 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 that connects the fixed block 21 and the vibration block 22. This functions as a vibration frame.
[0014]
The vibration block 22 is provided with a rotation main shaft 24. A feature of this embodiment is that a motor 25 is attached to the vibration block 22. A pulley 27 is connected to the rotating shaft 26 of the motor 25, and a belt 27 is stretched between the pulley 27 and the rotating main shaft 2. Therefore, the rotation main shaft 24 is rotated by the motor 25 via the belt 27.
By arranging the motor 25 in the vibration block 22 in this way, the configuration of the gantry can be reduced in size, and the overall dynamic balance testing machine can be reduced in size.
[0015]
In the conventional propeller shaft dynamic balance testing machine described with reference to FIG. 1, the configuration shown in FIG. 4 can be adopted instead of the configuration of the right gantry 3 and the motor 16 and belt 15 attached thereto.
Further, the configuration on the main drive side composed of the left gantry 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.
[0016]
If the configuration shown in FIG. 4 is adopted, the influence of the tension force of the driving belt 27 does not affect the vibration in the vibration frame, and the propeller shaft dynamic balance test can be performed more accurately.
In addition, the size of the mechanical device can be reduced, and the production cost can be reduced.
The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the claims.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of a conventional dynamic balance testing machine for a propeller shaft.
FIG. 2 is a plan view showing an example of a conventional dynamic balance testing machine for propeller shafts.
FIG. 3 is a side view for explaining a configuration of a gantry in a conventional propeller shaft dynamic balance testing machine.
FIG. 4 is a side view for explaining the configuration of a propeller shaft dynamic balance test frame according to an embodiment of the present invention.
[Explanation of symbols]
20 frame (vibration frame)
21 Fixed block 22 Vibrating block 23 Leaf spring 24 Spindle 25 Motor 27 Belt

Claims (1)

A dynamic balance testing machine that applies a certain torque to a propeller shaft during a dynamic balance test for a propeller shaft for an automobile,
A dynamic balance test having a pair of left and right mounts, each of which is provided with a separate vibration frame and a rotating main shaft to which an end of a propeller shaft for performing a dynamic balance test provided on the vibration frame is attached. In the machine
In both mounts, a drive device for driving each rotating spindle is attached to the vibration frame of each mount,
One drive device is the main drive side, and rotates the rotating spindle at a predetermined measurement rotational speed.
The other drive device is the auxiliary drive side, and rotates the rotation main shaft at a lower rotation speed than the rotation main shaft of one of the gantry,
A propeller shaft dynamic balance testing machine characterized in that a constant torque can be applied to the propeller shaft having both ends attached to both rotating main shafts.

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