JPS6327994B2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to an improvement of a variable vibrator in which a fixed weight and a movable weight are installed coaxially, and the amplitude can be changed by changing the angle of the movable weight. Variable vibration that allows you to freely change the angle of the moving weight to change the swing width from zero to maximum, and also allows you to adjust the frequency as needed and freely by continuously changing the number of rotations. It is related to the machine.

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 the maximum. It is designed to be.
The fixed angle of the movable weight can be changed freely, and the above-mentioned swing width can be changed depending on the application between zero and the maximum swing width. Since the output shaft must be stopped and the cover must be disassembled to attach the cover, it is not possible to change the mounting angle arbitrarily by checking the condition of the swing width while driving. The same applies to other types of variable vibrators equipped with weights and movable weights.

In view of the above, the present invention provides a continuously variable speed motor that allows the angle of the movable weight to be freely adjusted to a desired swing width even during operation, and that also allows the rotation speed of the output shaft to be freely adjusted. By using this, the frequency can also be changed arbitrarily.

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

In the figure, 1 is a mounting frame that is fixed to a member that requires vibration, and a vibration frame 2 is placed in the center of the frame, and hollow shafts 3 and 4 fixed at both ends are mounted using bearings 5 and 6. Pivotally supported on frame 1. A first pulley 12 is fixed to the outer end of one of the hollow shafts 3.

A shaft 7 passes through the hollow shafts 3 and 4 on both sides and has its outer circumference exposed inside the vibrating frame 2, and is rotatably supported by bearings 8 and 9 provided between the inner circumferences of the hollow shafts 3 and 4. , an axial guide 10 is provided in a portion passing through the inside of the vibrating frame 2. The guide 10 may also be a spline. The shaft 7 has one end long enough to protrude from the hollow shaft 3, has a spline 11 formed at the end, and has a first pulley 12 inside the spline.
A second pulley 13 with a slightly smaller groove radius is rotatably supported under the interposition of a bearing 14.

A fan-shaped fixed weight 15 (FIG. 2) is provided in a part of the vibration frame 2, and a fan-shaped movable weight 1 that engages with the guide 10 and restricts free rotation in the rotational direction is provided on the shaft 7.
6 is fitted (FIG. 2), and the corresponding surfaces of the fixed weight 15 and the movable weight 16 are connected by a one-way clutch 17. In this embodiment, as will be described later, when the hollow shafts 3, 4, the vibration frame 2, and the shaft 7 are actively rotated in the same direction, the shaft 7 rotates a little faster, and normally the shaft 7 does not vibrate. The one-way clutch 17 acts when the shaft 7 rotates at its own speed, but when the shaft 7 rotates at its own speed, the one-way clutch 17 acts. It is necessary to prevent the effects of No. 17 from reaching the area. For this purpose, as shown in FIG. 3, the clutch body 18 attached to the fixed weight 15 has an engagement surface 19 on the front side in the rotational direction of the fixed weight and is a side-shaped serrated ring, and the clutch body 21 attached to the movable weight 16 is attached to the shaft 7. Engagement surface 1 when driven
9 and has a serrated ring shape which is pushed in the axial direction by a slope 20 behind the engagement surface 19 during rapid rotation of the shaft. For this purpose, the moving weight 16 has
A spring 22 is applied which acts to force the clutch bodies 21, 18 into engagement. Especially one-way clutch 1
7 allows the clutch body 21 to move in the axial direction, or rotates the clutch body 21 along with it when the clutch body 18 rotates quickly without using the spring 22, and rotates the clutch body 18 when the clutch body 21 rotates quickly. You can freely use any known structure that is left behind.

A clutch 24 is provided on a side surface of the second pulley 13 and on each side surface of a movable piece 23 which is fitted onto the spline 11 of the shaft 7 and is free to move only in the axial direction.
The movable piece 23 is an electromagnetic device 28 (can be installed manually)
The movable clutch teeth 26 of the movable piece 23 are mated and engaged with the fixed clutch teeth 25 on the side surface of the second pulley 13, and the electromagnetic device 28
When the shaft 7 is moved in the direction of the arrow in FIG. 1 by command, the clutch 24 is engaged and the shaft 7 is rotated at its own speed.

29 is a continuously variable speed motor, and its output shaft 30
A pulley 31 having two circumferential grooves 32 and 33 corresponding to the first and second pulleys 12 and 13 is fixed thereon, and a first belt 3 is attached to the circumferential groove 32 and the circumferential groove of the first pulley 12.
4, and the second belt 35 is hung between the circumferential groove 32 and the circumferential groove of the second pulley 13. 1st and 2nd pulley 1
2 and 13 are constantly rotated by a continuously variable speed motor 29, and the second pulley 13 is connected to the first pulley 1.
Rotates at a slightly faster shaft speed than 2.

The vibrating frame 2 including the fixed weight 15 and the movable weight 16 are:
The design is such that when the fixed weight 15 and the movable weight 16 are opposed to each other at an angular interval of 180°, a weight balance is created that does not cause vibration in the mounting frame 1 or the like.

To explain the operation of this embodiment, the continuously variable speed motor 2
9, the first pulley 12 and the second pulley 13 rotate via the first belt 34 and the second belt 35. However, the second pulley 13, which rotates a little faster, and the shaft 7 rotate as shown in FIG. 1 of the clutch 24. Since the vibration frame 2 rotates at the axial speed of the first pulley 12, the engaging surface 19 of the clutch body 18 of the fixed weight 15 pushes the teeth of the clutch body of the movable weight 16, and the movable weight 16 and shaft 7 are interlocked by the axial speed of the first pulley, and the movable piece 23 of the clutch 24 also rotates at the same axial speed, so the mounting frame 1 is connected to the fixed weight 1.
5 and a predetermined corresponding angle of the movable weight 16, it vibrates with a constant amplitude.

When it is necessary to change the swing width, the electromagnetic device 28
The movable piece 23 is moved in the direction of the arrow in FIG. 1 to move the movable clutch tooth 26 to the fixed clutch tooth 25.
, thereby causing engagement of the clutch 24. In such a case, the second pulley 13 rotating at a slightly faster shaft speed than the first pulley 12 causes the shaft 7 to move around the vibrating frame 2 provided with the fixed weight 15.
Rotates at a slightly faster shaft speed than the one-way clutch 17
The teeth of the clutch body 21 are connected to the slope 2 of the clutch body 18.
0 and moves in the axial direction against the sliding spring 22,
Once over the slope 20, the return movement is repeated by the elasticity of the spring 22, and the movable weight 16 quickly rotates, for example, in the direction of the arrow in FIG. 2, with the fixed weight 15 as a reference. If the clutch 24 remains engaged, the shaft 7 and moving weight 1
The differential movement in the arrow direction based on the fixed weight 15 of 6 continues, but the moving weight 16 produces a desired swing width on the mounting frame 1 etc. in response to a desired angle with respect to the fixed weight 15. When this happens, the command signal given to the electromagnetic device 28 is canceled. At that time, the clutch body 21 is carried by the engaging surface 19 of the clutch body 18 of the one-way clutch 17, and the shaft 7 and the moving weight 1
6 is rotated at the same speed according to the shaft speed of the first pulley 12 to maintain the selected amplitude.

The frequency of vibration, that is, the period of vibration is changed by changing the rotational speed of the output shaft 30 of the continuously variable speed motor 29.

As clarified from the above description, the present invention includes:
Vibration frame 2 with fixed weight 15 attached and movable weight 16
is attached to the shaft 7 and the first
The pulley 12 and the second pulley 13 can be rotated at different shaft speeds, and when the swing width does not need to be changed, the interlocking relationship between the second pulley 13 and the shaft 7 is controlled by the clutch 24. At that time, the one-way clutch 1 is insulated by the action of "disconnection", and at that time, the fixed weight 15 rotating at the axial speed of the first pulley 12
The movable weight 16 and the shaft 7 are driven together at the same shaft speed via the motor 7, and the first pulley 12 and the second pulley 13, which rotate differentially as described above, are driven differentially by the continuously variable speed motor 29. The vibration width and frequency can be adjusted at any time while checking the vibration width and frequency conditions during operation using the mounting frame 1 or a meter. It represents an excellent inventive step.

[Brief explanation of the drawing]

The accompanying drawings show one embodiment of the present invention, and FIG.
FIG. 3 is a partially exploded view of the one-way clutch 17, and FIG. 4 is an explanatory plan view when the clutch 24 is engaged. 1... Mounting frame, 2... Vibration frame, 7... Shaft, 10... Guide, 12... First pulley, 13... Second
Pulley, 15... Fixed weight, 16... Moving weight, 17... One-way clutch, 18... Clutch body, 21... Clutch body, 24... Clutch, 25... Fixed clutch tooth,
26...Movable clutch tooth, 29...Continuously variable speed motor,
32, 33... Circumferential groove, 34... First belt, 35... Second belt.

Claims (1)

[Claims] 1 A mounting frame rotatably supports a transducer frame and a hollow shaft at the end of the frame, a shaft passing through the center of the transducer frame is rotatably supported on the hollow shaft, and a fixed weight is attached to the transducer frame. A movable weight is fitted to the shaft, the fixed weight and the movable weight are connected by a one-way clutch, a first pulley is firmly fitted to the hollow shaft, and a second pulley is fitted to the shaft for free rotation. The two pulleys are connected so as to be driven differentially by continuously variable speed motors with different rotational speeds.
The second pulley is provided with a fixed clutch on the shaft that can freely engage and separate from the movable clutch in response to a timely engagement command, and the movable weight corresponding to the fixed weight can be moved by the timely engagement of the movable clutch with the fixed clutch. A variable vibrator that changes the angle.