JPS6328670B2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to an improvement of a variable vibrator in which a fan-shaped fixed weight and a fan-shaped movable weight are installed coaxially, and the amplitude can be changed by changing the angle of the sector-shaped movable weight. Also, the angle of the sector-shaped movable weight can be freely changed to change the amplitude as appropriate.

The most commonly used variable vibrator is a vibration motor, which has a fan-shaped fixed weight and a movable weight of the same shape fixed to the motor output shaft.
When the fixed weight and moving weight are fixed to the motor output shaft with an angular interval of 180°, the calculated amplitude is zero, and when the fixed weight and moving weight are fixed to the motor output shaft with the same phase, the amplitude is maximum. It is designed to.
The fixed angle of the movable weight can be changed freely, and the above-mentioned amplitude can be changed between zero and maximum amplitude according to the application, but this installation requires changing the motor output shaft. Since the machine must be stopped and the cover disassembled to install it, it is not possible to arbitrarily change the mounting angle while checking the amplitude while the machine is running. The same applies to other types of variable vibrators that are driven by a motor and have a fixed weight and a movable weight attached to the main shaft.

In view of the above, in normal operation, the present invention rotates a vibrator frame provided with a fan-shaped fixed weight and a shaft to which a fan-shaped movable weight is fixed coaxially and at the same axial speed inside the mounting frame to generate an arbitrarily set amplitude. Vibration is applied to the mounting frame as well as the device to which the frame is fixed, and by switching the clutch at appropriate times during operation, the shaft is rotated independently by the second pulley to convert the angle of the sector-shaped movable weight corresponding to the sector-shaped fixed weight. In addition to making it possible to freely set separate amplitudes, the rotation control direction of the shaft can be controlled in either of two directions by switching the clutch without connecting the fan-shaped fixed weight and the fan-shaped movable weight with a one-way clutch or the like. It is designed so that it can be done.

A preferred embodiment of the invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 is a mounting frame that is attached to and fixed to a device that requires excitation.A transducer frame 3 with a side plate as a fan-shaped fixed weight 2 is placed in the center of the frame, and the side plate is attached to the side plate on both sides. Fixed hollow shafts 4 and 5 are pivotally supported on the mounting frame 1 by bearings 6 and 7. One of the hollow shafts 4 is made to protrude outside the mounting frame 1, and a first pulley 8 is fixed to the outer periphery thereof, and a first clutch engaging gear 9 is integrally provided or attached to the side surface of the first pulley 8.

At the center of the hollow shafts 4 and 5 and the mounting frame 1,
Insert the shaft 10 from the outside and insert the bearing 11.
- 14, it is rotatably supported. The shaft 1
0, a mantle 15 is fitted and fixed on the outside protruding from the hollow shaft 4, a spline 16 is provided on the outer periphery of the mantle 15 close to the first pulley 8, and a spline 16 is provided on the outer periphery of the mantle 15, and
Bearing 1 is located to the left of spline 16 in the figure.
7, a second pulley 18 is rotatably fitted, a second clutch tooth ring 19 is integrally provided or attached to the side surface of the first pulley 8 corresponding to the clutch engaging tooth ring 9, and 9 and the second clutch gear 19 to create a constant axial distance L. Further, the outer end of the shaft 10 is provided with a bearing 2.
0 through a bearing box 21. 2
A spacer tube 2 is fitted into the sleeve 15 between the bearing 20 and the bearing 17 and between the bearing 17 and the end face of the spline 16.

Fixed to the shaft 10 are sector-shaped movable weights 23 that are closely matched to the sector-shaped fixed weights 2 of the vibrator frame 3.

A ring-shaped switching clutch 24 is fitted into the above-mentioned interval L so as to be freely movable on the spline 16 and restrained by the spline 16 in the rotational direction, and its both end surfaces are adapted to be engageable with the first clutch gear 9. A first switching clutch tooth 25 and a second switching clutch tooth 26 that engageably correspond to the second clutch tooth ring 19 are provided, and a switching command transmission ring 27 is fitted to the outer periphery of the switching clutch 24 via a bearing. A rod 31 of a cylinder 30 swingably supported by a shaft 29 is connected to the annular arm 28 on the outer periphery of the transmission wheel 27.

The cylinder 30 moves the rod 31 as shown by the two arrows in the figure, moves the switching clutch 24 on the spline 16 of the shaft 10 via the annular arm 28 and the switching command transmission wheel 27, and connects the first switching clutch tooth. 25 is engaged with the first clutch gear 9, and the hollow shafts 4, 5, the vibrator frame 3, and the shaft 10 are interlocked by the first pulley 8, and the fan-shaped fixed weight 2 and the fan-shaped movable weight 23 are made to have the same shaft speed. or the second switching clutch tooth 26 is engaged with the second clutch tooth wheel 19 as shown in FIG. 1, and only the shaft 10 is rotated independently by the second pulley 18. 23, the angle corresponding to the fan-shaped fixed weight 2 can be changed arbitrarily.

The belt 32 placed around the first pulley 8 is driven by a continuously variable speed motor (not shown). 2nd pulley 1
The belt 33 around the belt 8 can be driven by the same motor as described above, but it can also be driven by another motor. When driven by the same motor as described above, the effective diameter of the second pulley 18 is made slightly smaller or slightly larger than the effective diameter of the first pulley 8, so that the first pulley 8 and the second pulley Change each rotation speed of 18.

In the embodiment described above, the fan-shaped fixed weight 2 and the fan-shaped movable weight 23 have different radii, and the fan-shaped fixed weight 2 formed by the side plates of the transducer frame 3 has side plates (fan-shaped fixed weights) on both sides thereof. 2), the weight of the cylindrical, rod-shaped, etc. connecting material that connects them is added, but the weight balance of both weights 2 and 23 is made almost uniform by reducing the thickness. Of course, since zero amplitude control may not be necessary, the weight balance may not need to be exact. The fan-shaped fixed weight and the fan-shaped movable weight do not necessarily have to be fan-shaped. Here, the fan shape simply follows the shape of the fixed weight and movable weight of the conventional variable vibrator (mentioned above), in which the motor is stopped and the cover is removed to adjust the amplitude. This is for the same reason that there is no principle that the weight and the movable weight must always be fan-shaped.

To explain the operation of this embodiment, the fan-shaped movable weight 23
When the corresponding angle with the fan-shaped fixed weight 2 is made to have a phase difference of 180° as shown in Fig. 2 by the independent rotation of the shaft 10, the frequency becomes theoretically zero, as is known.
When the phases are the same as shown in Fig. 3, the frequency becomes theoretically maximum.

Therefore, the conversion of the corresponding angle by the independent rotation of the shaft 10 of the fan-shaped movable weight 23 is performed by the cylinder 3.
0 to move the switching clutch 24 by pulling the rod 31 to the left in FIG. The first pulley 8
This is done by separating it from the first clutch gear 9. At that time, the first pulley 8 is driven by the belt 32, and even when the hollow wheels 4, 5, the vibrator frame 3, and the fan-shaped fixed weight 2 are rotating by the first pulley 8, the shaft 1
0 rotates differentially, fan-shaped fixed weight 2 and fan-shaped movable weight 2
The relative angle of No. 3 is rotated from zero angle with no phase difference until it shows a phase difference of 180°. In addition, in order to rotate the fan-shaped fixed weight 2 and the fan-shaped movable weight 23 at the same axial speed, the cylinder 30 moves the rod 31 to the right in FIG. This is done by releasing the clutch connection with the second pulley 18.

As has been made clear from the above description, the present invention has the hollow shaft 4 that forms the drive shaft of the sector-shaped fixed weight 2 provided on the side plate of the vibrator frame 3, and the shaft 10 that forms the drive shaft of the sector-shaped movable weight 23 coaxially. Install and install frame 1
A first pulley 8 is attached to the hollow shaft 4, a second pulley 18 is attached to the shaft 10, and a switching clutch 24 is installed on the shaft 10 to enable reciprocating movement in the axial direction and disable rotation. The clutch 24 is engaged with the first pulley 8 to rotate the hollow shaft 4 and the shaft 10 in conjunction at the same shaft speed, or the clutch 24 is engaged with the second pulley 18 and only the shaft is driven by the second pulley 18. While the first pulley 8 is being driven to rotate, the shaft 10 is rotated by the first pulley 8.
Switching from coaxial speed interlocking with the second pulley 18 to rotation by the second pulley 18, due to the switching configuration, the fan-shaped fixed weight 2
and the sector-shaped movable weight 23 are fixed at the same axial speed while maintaining the set amplitude, or the amplitude can be freely changed by changing the angle of the sector-shaped movable weight 23 corresponding to the sector-shaped fixed weight 2. With regard to a device in which the mounting frame 1 is fixed, even when the fan-shaped fixed weight 2 and the fan-shaped movable weight 23 are rotating at the same axial speed and being excited, the amplitude can be increased without stopping the rotational drive of the first pulley 8. It can be adjusted freely, and in order to change the amplitude it is only necessary to actuate the switching clutch 24 outside the mounting frame 1.
The amplitude adjustment can be performed with an extremely simple configuration.

[Brief explanation of the drawing]

The accompanying drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional plan view of the central part, Fig. 2 shows the adjustment of zero amplitude, and Fig. 3 shows the adjustment of the maximum amplitude. It is a side view cut along the line A-A. DESCRIPTION OF SYMBOLS 1... Mounting frame, 2... Fan-shaped fixed weight, 3... Vibrator frame, 4... Hollow shaft, 8... First pulley, 9... First clutch tooth ring, 10... Shaft, 16... Spline, 18... Second pulley, 19...Second clutch tooth ring, 23...Sector-shaped movable weight, 24...Switching clutch, 2
7...Switching command transmission wheel, 32...Belt, 33...Belt.

Claims (1)

[Claims] 1. A transducer frame with fan-shaped fixed weights provided on the side wall is built into the mounting frame, and hollow shafts at both ends of the transducer frame are rotatably supported by the mounting frame, and the hollow shafts protruding to the outside of the mounting frame are A first pulley is fixed to the shaft, a shaft is rotatably inserted through the center of the hollow shaft and the vibrator frame, a sector-shaped movable weight corresponding to the sector-shaped fixed weight is fixed to the shaft, and the second pulley is freely rotatable. With loose fit,
Further, a switching clutch is fitted onto the shaft with only sliding movement allowed, and the switching action of the switching clutch transmits the rotation of the first pulley or the second pulley to the shaft, and the rotating torque of the second pulley causes the switching clutch to be fixed to the shaft. A variable vibrator characterized in that the amplitude is converted by converting the phase of the fan-shaped movable weight corresponding to the fan-shaped fixed weight.