JP2006063930A - Reciprocating rotation number-controlling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reciprocating rotation number-controlling device with a simple structure capable of controlling rotations in reciprocation to the same numbers by making use of the characteristics of a constant-torque spiral spring. <P>SOLUTION: A main pulley and a sub pulley are rotatably pivoted to a main shaft which is connected to a motor so as to be driven to rotate in only one direction and an independent sub shaft, respectively, and both ends of the constant-torque spiral spring are interlocked to the main and sub pulleys so as to be mutually driven and reversely wound to each other. The reciprocating number is set by constituting such that the spring is rewound to the end of its interlocking point. Further, a subsidiary main pulley is integrally pivoted by the main shaft, and a subsidiary sub pulley freely rotatable integrally with the main pulley is pivoted by the sub shaft. Both ends of a resilient spiral spring are interlocked to the subsidiary main and sub pulleys while winding in the same direction as each other to accumulate a mechanical energy to the resilient spiral spring by motor driving. Thereby, the rotation drive of the motor to the subsidiary main pulley is released at one point of unwinding finished end by the constant torque spiral spring and is started at the other point. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a reciprocating rotational speed control device that repeatedly repeats shaft rotation at the same number using the characteristics of a constant torque spring.

  A mechanism in which a shaft is rotated a certain number of times by a motor and then reversed in the same number and repeatedly performed in some cases may be used mechanically. For example, a device that winds or feeds a linear or belt-like object for a certain length, a device that rotates or stops a handle, a pulley, a gear, or the like by a constant rotation, or the like. As a specific example, there is a fan head swing device. Such a reciprocating rotation speed control device conventionally has not been able to obtain a reciprocating function other than using a complicated cam mechanism or electrical counting control. By the way, an elastic spring made of rolled steel (which means ordinary spring) could not be used.

  In other words, from the viewpoint of the nature of the elastic spring, when torque is applied against the elastic force by applying a load to the rotating shaft from the steady state (or when it is rewound), the torque input as the force to apply the load is At the same time, the torque output that tries to return by the elastic force is strengthened. Conventionally, various mechanisms such as a timepiece have been devised by utilizing a mechanical energy accumulation function as a torque output.

  The elastic spring is an important mechanical element that is applied in various ways by this action. However, since this elastic property may not be used because it is a defect in design, for example, when only the property as a strip steel is desired, a constant torque spring (also called a coupling) has been developed.

  The function or characteristic of the constant torque spring is compared with that of the elastic spring as follows.

1) The load applied to the elastic spring changes and increases from the steady state according to the expansion and contraction, whereas the constant torque spring maintains a constant amount without changing the load.
2) Although the initial spring has zero or very small initial load, the constant torque spring is large.
3) The elastic spring is the limit when the elongation is about 1/2 to 2 times that of the original spring, but the constant torque spring can be used up to 30 to 50 times. In other words, there is flexibility in elongation. The present invention mainly focuses on the possibility of utilizing this characteristic.
4) The elastic spring has a small holding energy, whereas the constant torque spring has a large energy accumulation when stored in the same space.
5) The elastic spring has a loss of energy due to internal friction during tightening and rewinding, but the constant torque spring operates smoothly and has little friction.

  In view of the above, it is an object of the present invention to provide a reciprocating rotation speed control device that applies the characteristics of a constant torque spring to control the number of rotations in a reciprocating manner with the same structure.

  In order to solve the above-mentioned problems, the present invention provides a main pulley and a sub pulley that are rotatably attached to a main shaft connected to a motor so as to be rotationally driven only in one direction and an independent sub shaft. The two ends of the constant torque spring are connected to each other so that the main pulley and the sub pulley follow each other, and in both of the connections, the constant torque spring is wound up to the end of the connection point. The reciprocating rotational speed is set so as to be returned, and the dependent main pulley is integrally attached to the main shaft, and the dependent auxiliary pulley that freely rotates integrally with the main pulley is axially attached to the auxiliary shaft, In order that mechanical energy is accumulated in the elastic spring when the motor is driven, both ends of the elastic spring are connected to the dependent main pulley and the dependent auxiliary pulley so that they are wound in the same manner, and are connected to the dependent main pulley. A reciprocating rotation speed control device is provided in which the rotational drive of the motor is released at one time of the final end of rewinding by the constant torque spring and started at the other time. is there.

  Since the reciprocating rotation speed control device is configured as described above, the main shaft is an input shaft by a motor and at the same time an output shaft by a spring spring. That is, rotation in one direction is due to driving of the motor, while rotation in the opposite direction is due to elastic driving of mechanical energy stored in the constant torque spring by driving of the motor. At the time of input / output, the main shaft rotates in the same direction as the sub main pulley integrated therewith, but the rotation of the sub main pulley is transmitted to the sub sub pulley and the sub pulley via the elastic spring and vice versa. At the same time, since the constant torque spring is exchanged between the auxiliary pulley and the main pulley and the rotation constant is secured, the forward and reverse rotational speeds of the main shaft integrated with the dependent main pulley are also controlled to be the same. It will be.

  As described above, according to the present invention, attention is paid to the characteristic of the constant torque spring that can move the other pulley in the same step between the main shaft and the sub shaft. By adopting a simple structure in which rotation in the other direction is driven by the elastic force of the elastic spring, there is an excellent effect that the main shaft can be reciprocated at a stable speed at the same rotational speed. Further, unlike the case where a mechanism such as a cam is used, the distance between the main shaft and the sub shaft can be freely set together with the length of the constant torque spring, and there is an advantage that the degree of freedom in design is great.

  FIG. 1 shows a constant torque spring H used in the present invention, FIGS. 2 and 3 show an embodiment of the present invention, and FIG. 4 is an operation explanatory view of the embodiment. In FIG. 1, since the main pulley 5 is attached to the main shaft 1 and the sub pulley 2 is attached to the sub pulley 6 so as to rotate freely, the constant torque spring H is pulled or pulled regardless of which of the main and sub pulleys 5 or 6 rotates. As a feed, the other pulley 6 or 5 rotates in the same direction. Note that this depends on how to wind the pulleys 5 and 6 in a crotch form.

  The reciprocating rotation speed control device rotates the main shaft 1 directly in the clockwise direction by the motor 3 among the main shaft 1 and the sub shaft 2 installed in parallel, and causes the reverse rotation by the elastic spring S, while the constant torque spring H The forward / reverse rotation is adjusted to the same number. The main shaft 1 and the auxiliary shaft 2 are pivotally supported between the substrate 4 and the attached plate 10, and the motor 3 is attached to the substrate 4.

  In order to mount the constant torque spring H and the elastic spring S, the main pulley 5 around which the constant torque spring H is wound around the main shaft 1 is freely attached to the shaft, and the dependent main pulley 8 around which the elastic spring S is wound is provided. A fixed pulley is pivotally attached, but a composite pulley in which a secondary pulley 6 around which a constant torque spring H is wound and a dependent secondary pulley 9 around which a spring spring S is wound is integrally formed on the secondary shaft 2 so as to be freely attached to the shaft. Is done.

  Since the constant torque spring H is wound in a crotch shape, when the sub pulley 6 rotates, the main pulley 5 rotates in the rotation direction. Since the main pulley 5 is free, it rotates in the same direction according to the rotation direction of the sub pulley 6.

  On the other hand, the elastic spring S is in a so-called upside down winding form in which the dependent main pulley 8 is applied at the upper end and the dependent auxiliary pulley 9 is applied at the lower end thereof. The main pulley 5 rotates simultaneously with the auxiliary pulley 6 at the same time as the mechanical energy is accumulated. If this is a normal rotation, the rotation is reversed by releasing mechanical energy.

  FIG. 4 shows both the constant torque spring H and the bullet spring S in the stages (A), (B), (C), and (D), and the operation will be described in order in FIG. .

  At the initial stop position (A), most of the constant torque spring H is wound around the main pulley 5 with a few turns left on the auxiliary pulley 6 (left figure). On the other hand (in the right figure), the elastic spring S is wound only on the sub-sub pulley 9 at this time, and has no energy storage and is in a stopped state.

  Next, when the main shaft 1 is rotated clockwise (arrow) by driving the motor 3 from the initial position (A) (B), the elastic spring S is wound around the subordinate main pulley 8 in the clockwise direction, and the sub The pulley 9 rotates counterclockwise, and thus the elastic spring S gradually accumulates mechanical energy. On the other hand, the sub pulley 6 integrated with the sub sub pulley 9 rotates counterclockwise in the same manner as the sub sub pulley 9, and starts to wind the constant torque spring H from the free main pulley 5 (left arrow a). . When the constant torque spring H of the main pulley 5 is wound, the state C is stopped, the sub pulley 6 and the sub sub pulley 9 are stopped, and the sub main pulley 8 locked by the elastic spring S is also stopped. .

  As a means for releasing the main shaft 1 from driving the motor 3 in the stopped state (c), a clutch that is opened by sensing the stopped state is provided on the main shaft 1 side. Alternatively, a torque limiter mechanism that slides between the motor 3 and the main shaft 1 when an overtorque greater than the driving force of the motor 3 is applied (or a means that the motor 3 itself is free) can be considered. .

  When the main shaft 1 becomes free in this way, the stored energy of the above-described elastic spring S is released, and the sub-sub pulley 9 starts to rotate counterclockwise (d). Then, the auxiliary pulley 6 integral with the dependent auxiliary pulley 9 sends out the constant torque spring H and is wound around the main pulley 5. After that, the initial state of (A) is obtained. When this is detected, the driving of the motor 3 is started, the main shaft 1 is rotated again, and the winding of the constant torque spring H (the state of B) is started. By repeating the above, the main shaft 1 repeats clockwise and counterclockwise in the same number.

It is a perspective view which shows the constant torque spring which concerns on this invention. It is sectional drawing seen from the plane of the reciprocating rotation speed control apparatus which shows one Embodiment of this invention. It is sectional drawing of the AA arrow of FIG. It is operation | movement explanatory drawing of the order from seeing a constant torque spring and a bullet spring as a pair on the left and right.

Explanation of symbols

H Constant torque spring S Bullet spring 1 Main shaft 2 Sub shaft 3 Motor 5 Main pulley 6 Sub pulley 8 Sub main pulley 9 Sub sub pulley

Claims (1)

  A main pulley and a sub pulley are rotatably mounted on a main shaft connected to a motor so as to be driven to rotate only in one direction and an independent sub shaft, respectively, and the main pulley and the sub pulley follow each other. Thus, both ends of the constant torque spring are connected to each other so as to be reversely wound with each other, and in both of the connections, the reciprocating rotational speed is set so that the constant torque spring is rewound to the end of the connection point. In addition, the sub main pulley is integrally attached to the main shaft, and the sub sub pulley that rotates freely together with the main pulley is attached to the sub shaft, and mechanical energy is accumulated in the elastic spring by driving the motor. As shown in the figure, both ends of the elastic spring are connected to the dependent main pulley and the dependent sub pulley so that they are wound in the same manner. The rewinding becomes released by one time of the final end by the reciprocating speed control apparatus characterized by being configured so as to start at the other time.