JPH0563677U - Vibration motor - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to make it possible to change the centrifugal force of a vibration motor in multiple stages. [Structure] An eccentric weight attached to a rotary shaft 1 of a vibration motor is composed of a fixed weight 2 and an adjusting weight 3 which is rotatable with respect to the rotary shaft. By inserting a pin such as a bolt into the hole, the relative position of the two weights can be changed. The centrifugal force can be set in multiple stages by changing the relative positions of the fixed weight and the adjustment weight.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vibration motor having a variable centrifugal force, which is used as a vibration source of a mold for manufacturing a secondary concrete product.

[0002]

[Prior Art]

 Conventionally, as a vibration motor capable of adjusting centrifugal force, of a pair of opposing fan-shaped eccentric weights mounted on both ends of the rotary shaft of the motor, one of them is a fixed weight fixed to the rotary shaft, and the other is a rotatable weight. The adjustment weight is set so that the rotation of the adjustment weight with respect to the fixed weight is restricted only from an angle of zero to a certain angle, and both weights are normally spread by the spring to a certain angle. Rotation of the rotor rotates in one direction by switching the rotation direction, and in the opposite direction, both weights gradually move from a certain angle to a position of zero angle against the spring in the opposite direction. Since then, it has been proposed to rotate in that state (for example, JP-B-60-24472).

[0003]

[Problems to be solved by the device]

 In the conventional vibration motor, there were few stages of setting centrifugal force, and it was difficult to use it in correspondence with various types of concrete forms and concrete slabs that require different centrifugal forces. In addition, since it is not possible to confirm the setting state of the centrifugal force from the outside, it was difficult to correctly select the vibration motor adjusted to the centrifugal force that suits various molds.

[0004]

[Means for Solving the Problems]

 The vibration motor according to the present invention is a vibration motor in which eccentric weights are attached to both ends of a rotary shaft of the motor, wherein the eccentric weight is a fixed weight fixed to the rotary shaft and an adjustment rotatably attached to the rotary shaft. It is composed of weights, and the position of the adjusting weight with respect to the fixed weight can be changed in multiple stages. Therefore, a plurality of through holes are formed in the adjustment weight on the circumference centered on the axis of the motor rotating shaft, and the fixed weight is provided with a fixing pin inserted into one of the through holes. A receiving hole is formed (Claim 1). Further, the fixed weight may be provided with a plurality of receiving holes so that the relative positions of the fixed weight and the adjustment weight can be changed (claim 2). For example, a bolt is used as the fixing pin, and a female screw is formed in the receiving hole of the fixing weight (claim 3). If necessary, a centrifugal force display label is attached to the outer surface of the vibration motor (claim 4).

[0005]

[Action]

 In this invention, when any one of the through holes formed in the adjusting weight is selected and a pin is inserted into the through hole and the receiving hole of the fixed weight, the relative position between the fixed weight and the adjusting weight is determined. A centrifugal force corresponding to the position can be obtained. That is, different centrifugal forces as many as the number of through holes formed in the adjusting weight can be obtained. In addition, if bolts are used for the pins, the tightened state will be secure and the pins will be easy to put on and take off. Furthermore, if a label indicating the centrifugal force is attached to the surface of the motor, the centrifugal force of the motor can be known by looking at the display, and there is no risk of erroneous motor selection.

[0006]

【Example】

 As a pair of eccentric weights, a pair of fixed weights 2 and adjusting weights 3 are attached to both ends of the rotary shaft 1 of the vibration motor A, respectively. As shown in FIG. 2, the fixed weight 2 has a fan-shaped plate shape, and a shaft hole 4 formed on the main side of the fan is fitted to the rotary shaft 1. A key groove 5 is connected, and a key 6 is mounted between the key groove formed on the motor shaft 1. In addition, a receiving hole 7 having a female screw cut is formed in the peripheral portion.

On the other hand, the adjusting weight 3 has a fan-shaped plate shape as shown in FIG. 3, and a shaft hole 8 formed on the main side of the fan is fitted to the rotary shaft 1 of the motor. In addition, a plurality of holes 9 are formed in the peripheral portion on the same circumference centered on the axis of the rotary shaft 1 at appropriate intervals (7 holes 9a, 9b, 9c, 9d in FIG. 3). , 9e, 9f, 9g are shown), the bolt 10 inserted into one hole 9 is screwed into the receiving hole 7 of the fixed weight 2, and the adjustment weight 3 is fixed to the fixed weight 2. It is fixed. In FIG. 1, reference numeral 11 is a washer, and 12 is a weight fixing bolt.

In the vibration motor configured as shown in the figure, when the adjusting weight 3 is rotated about the rotary shaft 1 of the motor, the relative positions of the fixed weight 2 and the adjusting weight 3 are changed, and this occurs when the motor rotates. Centrifugal force increases or decreases. That is, after the fixed weight 2 is mounted on the rotary shaft 1, the receiving hole 7 of the fixed weight 2 is made to correspond to the appropriate hole 9 of the adjusting weight 3 and both are fixed by the bolt 10, and then the washer 11 and the bolt 12 are attached. By fixing the fixed weight 2 and the adjustment weight 3 to the rotary shaft 1 by means of, a plurality of different centrifugal forces corresponding to the holes 9 can be obtained.

Since the state of the weight adjusted in this way cannot be grasped from the outside, a label indicating the adjusted state of the weight, that is, the state of centrifugal force is provided on the outer surface of the motor A (for example, corresponding to each hole). If the centrifugal force to be applied is determined in advance as 1, 2, A, B, C, D, E, and the symbol is attached), then a motor suitable for each concrete form, etc. is attached. You can select without error.

Further, if the vibration motor is subjected to multi-step frequency control by the inverter, the centrifugal force can be changed by combining the rotational speed of the motor and the adjustment state of the weight, and a finer centrifugal force can be set. , The optimum vibration state can be obtained. Although a plurality of through holes are provided in the adjusting weight in the above-described embodiment, it is possible to provide one hole in the adjusting weight and a plurality of receiving holes in the fixed weight. At this time, it is effective to provide female screws in the plurality of receiving holes.

[0011]

[Effect of the device]

 According to this invention, the adjustment weight is rotatably attached to the fixed weight, and the plurality of through holes provided in the adjustment weight and the receiving holes of the fixed weight are fixed by the pins. By selecting a hole and fixing the relative position of both weights with a pin, the balance of the eccentric weight can be changed and the centrifugal force can be increased or decreased. Since the relative positions of both weights are fixed by pins, it is easy to change and there is no risk of the relative positions changing during operation. Therefore, since the centrifugal force of the vibration motor can be set in multiple stages, it becomes possible to mount the vibration motor having the optimum centrifugal force on various molds, and the vibration as designed can be applied to the mold.

Further, if a label indicating the adjustment state of the centrifugal force is attached to the outside of the motor, the set centrifugal force of each motor can be recognized from the outside at a glance, and the optimum state of the mold is adjusted. The motor can be selected quickly and without error. Then, if the motor is controlled by the inverter, the finer adjustment of the centrifugal force becomes possible. That is, according to this invention, it is possible to attach a motor having an optimum centrifugal force to a large number of molds that require different centrifugal forces, and it is possible to improve the efficiency of placing concrete.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

FIG. 2 is also an enlarged front view of the fixed weight.

FIG. 3 is also an enlarged front view of the adjustment weight.

[Explanation of symbols]

 1 rotary shaft 2 fixed weight 3 adjustment weight 7 receiving hole 9 hole 10 bolt A vibration motor

Claims (4)

[Scope of utility model registration request] 1. A vibration motor having eccentric weights attached to both ends of a rotary shaft of the motor, wherein the eccentric weight comprises a fixed weight fixed to the rotary shaft and an adjusting weight rotatably attached to the rotary shaft. A plurality of through holes are formed in the adjustment weight on a circumference centered on the axis of the motor, and a fixed pin receiving hole inserted into one of the through holes is formed in the fixed weight. Vibration motor 2. A vibration motor having eccentric weights attached to both ends of a rotary shaft of the motor, wherein the eccentric weight comprises a fixed weight fixed to the rotary shaft and an adjusting weight rotatably attached to the rotary shaft. A through hole is formed in the adjusting weight, and a plurality of receiving holes for the fixing pin inserted into the through hole are formed in the fixed weight on the circumference around the axis of the motor. Vibration motor 3. The vibration motor according to claim 1, wherein the fixing pin is a bolt, and a female screw is formed in the receiving hole of the fixing weight. 4. The vibration motor according to claim 1, wherein a centrifugal force display label is attached to the outer surface of the vibration motor.