JP2010242782A - Inertia control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inertia control device imparting sufficiently large size inertia to a rotary shaft, without imposing a burden on a motor, when the rotary shaft rotates at a constant speed, without imposing the burden on the motor for rotating the rotary shaft in acceleration and deceleration of the rotary shaft. <P>SOLUTION: This inertia control device has a rotary member 11 rotatable around the rotational axis 10L of the rotary shaft 10 and physically unconnected to the rotary shaft 10, a transmission member 12 rotatable around the rotational axis 10L of the rotary shaft 10, and an energizing member 13 for imparting energizing force in the direction of the rotary shaft 10 to the transmission member 12. The transmission member 12 transmits torque of the rotary shaft 10 to the rotary member 11 by abutting on the rotary member 11 by moving in the direction of the rotary member 11 against the energizing force by the energizing member 12 by centrifugal force generated by rotation around the rotational axis 10L. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an inertia control device that controls the magnitude of inertia applied to a rotating shaft of a rotating body.

  In general, a phenomenon may occur in which the rotating body does not rotate stably. For example, in a rotating body that is rotating, vibration may occur in the rotating body or the rotation speed may not be kept constant.

  In order to prevent such a phenomenon, the flywheel is usually attached concentrically with the rotating shaft of the rotating body. Such a flywheel gives inertia to the rotating shaft of the rotating body. Thus, since inertia is given with respect to a rotating shaft, it becomes possible to rotate a rotary body stably.

  However, in order for the rotational speed of the rotating shaft to accelerate and decelerate, it is necessary that the rotational force applied to the rotating shaft counters inertia that tries to stop and rotate the rotating shaft. In this way, when the rotational force applied to the rotating shaft counters the inertia that continues to stop and rotate the rotating shaft, a large burden is placed on the motor that rotates the rotating body. Therefore, in reality, the diameter and mass of the flywheel are determined according to the motor characteristics (for example, torque).

  Patent Documents 1 to 5 propose flywheels that can be used for general purposes without being restricted by the characteristics of the motor. In patent document 1, the flywheel is provided concentrically with the rotating shaft of the rotating body. A one-way clutch is provided between the rotary shaft and the flywheel. When the rotational speed of the rotary shaft decreases, the one-way clutch releases the connection between the rotary shaft and the flywheel and Reduce the inertia given.

  In Patent Document 2, an electromagnet is provided on the shaft side inside a flywheel attached concentrically with the shaft, and a magnetic body is provided on the radially outer side of the electromagnet. In such a flywheel, at the time of acceleration after the rotation of the shaft is started and at the time of deceleration until the rotation of the shaft is stopped, the electromagnet is energized and the magnetic body moves to the electromagnet side so that the shaft Less inertia is given. On the other hand, when the rotational speed of the shaft reaches a constant speed, the electromagnet is de-energized and the magnetic body moves radially outward by centrifugal force, and the inertia applied to the shaft increases.

  In Patent Documents 3 to 5, a movable body that is movable in the radial direction is provided inside a flywheel that is provided concentrically with a rotating shaft. When the rotational speed of the rotating shaft is accelerating and decelerating, the centrifugal force applied to the outer side in the radial direction with respect to the moving body is not so large, so the moving body does not move outward in the radial direction. In that case, since the center of gravity of the flywheel is not radially outward, the inertia given to the rotating shaft is small. On the other hand, when the rotating body reaches a constant speed, the moving body moves radially outward by centrifugal force and the center of gravity of the flywheel moves radially outward, so that the inertia given to the rotating shaft increases.

JP-A-10-196734 JP 9-42379 A JP-A-11-231723 JP 2000-291742 A JP 2000-310219 A

  Incidentally, the above-described flywheel has the following problems. That is, in Patent Document 1, it is necessary that the one-way clutch is provided between the rotating shaft and the flywheel. For this reason, the number of parts increases, which may cause an increase in cost.

  Moreover, in patent document 2, it is required that the electromagnet is provided in the shaft side. Furthermore, parts for controlling energization to the electromagnet are also required. For this reason, the number of parts increases, which may cause an increase in cost.

  In Patent Documents 2 to 5, a moving body for changing the size of the inertia is provided inside the flywheel. Since such a moving body has its own mass, even when the rotating shaft is accelerated and decelerated, even if the moving body does not move radially outward of the flywheel, the mass of the moving body itself flies. It is in a state of being added to the mass of the wheel body. Therefore, the inertia of the flywheel itself is not so small. For this reason, when the rotating shaft is accelerated and decelerated, a torque that can withstand the inertia of the flywheel itself is required, which is a burden on the motor that rotates the rotating shaft.

  Furthermore, in Patent Documents 2 to 5, when the moving body is positioned radially outside by rotating the flywheel at a constant speed, there is a gap in the circumferential direction between the moving body and the adjacent moving body. Has occurred. Therefore, even if the rotational speed of the flywheel reaches a constant speed, the amount of movement by which the center of gravity of the flywheel moves radially outward becomes insufficient. Therefore, the amount of movement by which the center of gravity of the flywheel moves outward in the radial direction of the flywheel becomes insufficient. Therefore, the inertia for maintaining the rotation speed of the rotation shaft with respect to the rotation shaft does not increase so much.

  The present invention has been made in order to solve the above-described problems. When the rotating shaft is rotating at a constant speed without burdening the motor that rotates the rotating shaft during acceleration and deceleration of the rotating shaft. An object of the present invention is to provide an inertia control device capable of giving a sufficiently large inertia to the rotating shaft without burdening the motor.

  An inertia control device according to an aspect of the present invention is provided with a concentric shape with the rotation shaft to give inertia to the rotation shaft, and is capable of rotating around a rotation center line of the rotation shaft. A rotating member that is not physically connected to the shaft, and is provided concentrically with the rotating shaft between the rotating shaft and the rotating member, and by the rotational force of the rotating shaft, the rotation center of the rotating shaft A transmission member capable of rotating around a line, and an urging member attached to the rotation shaft and the transmission member, and applying an urging force to the transmission member in the direction of the rotation shaft. The transmission member moves in the direction of the rotating member against the urging force of the urging member by the centrifugal force generated by the rotation around the rotation center line, contacts the rotating member, and the rotating member What Characterized by transmitting the rotational force of the rotary shaft (claim 1).

  According to this configuration, the transmission member that can rotate around the rotation center line of the rotation shaft by the rotation force of the rotation shaft from the rotation shaft toward the outer side in the radial direction of the rotation shaft is in contact with the transmission member. A rotating member is provided that can transmit the rotational force of the rotating shaft only when the rotating shaft is rotated and can rotate around the rotation center line of the rotating shaft. A biasing member that applies a biasing force to the transmission member in the direction of the rotation axis is attached to the transmission member. The transmission member moves in the direction of the rotating member against the urging force by the urging member by the centrifugal force generated by the rotation around the rotation center line, contacts the rotating member, and transmits the rotating force to the rotating member. To do.

  Therefore, when the rotating shaft is accelerated and decelerated, the magnitude of the centrifugal force received by the transmission member can be less than the urging force by the urging member, so the transmission member moves in the direction of the rotating member against the urging force by the urging member. do not do. Therefore, at the time of acceleration and deceleration of the rotating shaft, the rotating shaft and the rotating member existing outside in the radial direction of the rotating shaft are not physically connected.

  On the other hand, when the rotating shaft rotates at a constant speed, the magnitude of the centrifugal force received by the transmission member can exceed the urging force by the urging member, so the transmission member rotates against the urging force by the urging member. It moves in the direction of the member and comes into contact with the rotating member. Therefore, when the rotating shaft rotates at a constant speed, the rotating shaft and the rotating member existing on the radially outer side of the rotating shaft are physically connected.

  As described above, when the rotating shaft is accelerated and decelerated, the rotating shaft and the rotating member existing radially outside the rotating shaft are not physically connected, and the rotating shaft rotates at a constant speed. Are physically connected to a rotating shaft and a rotating member that exists on the radially outer side of the rotating shaft.

  Therefore, no load is applied to the motor that rotates the rotating shaft when the rotating shaft is accelerated or decelerated. Further, when the rotating shaft rotates at a constant speed, the rotating shaft and the rotating member rotate in the same direction in a physically connected state, so that the inertial mass of the rotating shaft increases. Therefore, a sufficiently large inertia for maintaining the rotation speed of the rotation shaft is given to the rotation shaft. Therefore, a sufficiently large inertia is given to the rotating shaft without burdening the motor. Therefore, even if a small motor with a small output is used, the rotating body rotates stably. In addition, since a small motor can be used, the space for installing the motor is reduced.

  In the above configuration, the rotating member includes a permanent magnet having a positive or negative polarity, and the transmission member includes a permanent magnet having a polarity opposite to that of the permanent magnet included in the rotating member. (Claim 2). In the above configuration, any one of the rotating member and the transmission member includes a permanent magnet having a positive or negative polarity, and the rotating member and the transmission member not including the permanent magnet are provided. Any one of them can be made of a magnetic material (claim 3).

  According to these configurations (configurations of claims 2 and 3), the physical connection between the transmission member and the rotating member can be reinforced by not only centrifugal force but also magnetic force by a permanent magnet.

  The said structure WHEREIN: It can be set as the structure further provided with the cyclic | annular hollow member which is provided concentrically with the said rotating shaft and accommodates the said rotating member (Claim 4).

  According to this configuration, the rotating member is accommodated in the annular hollow member provided concentrically with the rotating shaft. Therefore, the hollow member can serve as a guide for moving the rotating member along the circumferential direction of the rotating shaft. Therefore, the rotating member can be rotated around the rotation center line of the rotating shaft.

  The said structure WHEREIN: It can be set as the structure further provided with the cyclic | annular guide member which is provided concentrically with the said rotating shaft and guides so that the said transmission member may rotate along the circumferential direction of the said rotating shaft. (Claim 5).

  According to this configuration, the transmission member is guided by the annular guide member so as to rotate along the circumferential direction of the rotation shaft. Therefore, the transmission member can smoothly rotate around the rotation center line of the rotation shaft.

  The said structure WHEREIN: Each of the said transmission member and the said biasing member can be set as the structure provided with two or more (Claim 6). According to this configuration, when the rotating shaft rotates, the transmission member comes into contact with the plurality of portions of the rotating member. Each of such transmission members is attached to the rotating shaft as described above. Therefore, the physical connection between the rotating member and the rotating shaft is strengthened.

  The said structure WHEREIN: It can be set as the structure further equipped with the hollow part which accommodates the said urging | biasing member which reaches | attains a rotation center line along the radial direction of the said rotating shaft from the surrounding surface of the said rotating shaft. 7). According to this configuration, the urging member is accommodated in the hollow portion that reaches the rotation center line along the radial direction of the rotation shaft from the peripheral surface of the rotation shaft. Therefore, the phenomenon that the urging member accelerates and decelerates behind the rotating shaft is suppressed as much as possible by the inertia of the urging member itself. Therefore, the transmission member attached to the urging member can be stably rotated by the rotational force of the rotating shaft.

  The said structure WHEREIN: The several hollow part which accommodates the said urging member which reaches a rotation center line along the radial direction of the said rotating shaft from the surrounding surface of the said rotating shaft is provided along the circumferential direction of the said rotating shaft. In addition, at the intersection where each of the hollow portions intersects on the rotation center line, a center member to which one end of each of the urging members accommodated in the hollow portion is attached can be provided. 8).

  According to this configuration, the plurality of urging members are accommodated in the plurality of hollow portions along the circumferential direction of the rotation shaft. For this reason, since the plurality of transmission members are provided along the circumferential direction of the rotating shaft, each of the transmitting members can rotate around the rotation center line of the rotating shaft without being displaced in the axial direction of the rotating shaft. Then, when the centrifugal force generated by the rotation of each transmission member exceeds the urging force by the urging member, each of the transmission members can abut against the rotation member in the circumferential direction. Therefore, the physical connection between the transmission member and the rotating member is strengthened.

  The said structure WHEREIN: The said urging | biasing member can be set as the structure which is an elastic member which has the restoring force which goes to the said rotating shaft direction (Claim 9). According to this configuration, since the biasing member is an elastic member, for example, the biasing member can be configured by a spring. Therefore, the urging member is inexpensive.

  According to the present invention, at the time of acceleration and deceleration of the rotating shaft, the rotating shaft and the rotating member existing on the radially outer side of the rotating shaft are not physically connected, and the rotating shaft rotates at a constant speed. In this case, the rotating shaft and the rotating member existing on the radially outer side of the rotating shaft are physically connected.

  Therefore, no load is applied to the motor that rotates the rotating shaft when the rotating shaft is accelerated or decelerated. Further, when the rotating shaft rotates at a constant speed, the rotating shaft and the rotating member rotate in the same direction in a physically connected state, so that the inertial mass of the rotating shaft increases. Therefore, a sufficiently large inertia for maintaining the rotation speed of the rotation shaft is given to the rotation shaft. Therefore, a sufficiently large inertia is given to the rotating shaft without burdening the motor.

It is the perspective view which showed an example of the external appearance of the inertia control apparatus which concerns on one Embodiment of this invention. It is the perspective view which showed an example of the external appearance of the principal part of an inertia control apparatus. It is a figure for demonstrating the detailed structure of an inertia control apparatus. It is a figure for demonstrating the detailed structure of an inertia control apparatus, and is the figure which showed the state which each of the transmission member contacted each of each rotation member.

  Hereinafter, an inertia control device according to an embodiment of the present invention will be described. FIG. 1 is a perspective view showing an example of the appearance of an inertia control device according to an embodiment of the present invention. FIG. 2 is a perspective view showing an example of the appearance of the main part of the inertia control device of FIG. Such an inertia control device 1 is used, for example, in an image forming apparatus in order to stably rotate a rotating body (for example, a photosensitive drum, a driving roller for driving a transfer belt around).

  As shown in FIG. 1, the inertia control device 1 is provided concentrically with a rotating shaft 10 of a rotating body (not shown), and is an annular hollow member that houses a rotating member 11 (see FIG. 2). 110. Further, as shown in FIG. 2, the inertia control device 1 rotates between the rotation shaft 10 and the hollow member 11 around the rotation center line 10 </ b> L concentrically with the rotation shaft 10. The transmission member 12 is provided.

  As shown in FIGS. 1 and 2, a coil spring (biasing member) 13 attached to the rotating shaft 10 is attached to such a transmission member 12. Each of the coil springs 13 is rotated around the rotation center line 10 </ b> L of the rotating shaft 10 by transmitting the rotational force of the rotating shaft 10 when the rotating shaft 10 rotates. Then, each rotational force of the coil spring 13 is transmitted to each of the transmission members 12, and each of the transmission members 12 rotates around the rotation center line 10 </ b> L of the rotation shaft 10. Therefore, when the rotary shaft 10 rotates, the rotational force of the rotary shaft 10 is transmitted to each of the transmission members 12, and each of the transmission members 12 can rotate around the rotation center line 10L of the rotary shaft 10. .

  From the viewpoint of smoothly transmitting the rotational force of the rotating shaft 10 to the rotating member 11, it is desirable to provide the same number of transmitting members 12 as the number of rotating members 11. In the present embodiment, the number of each of the rotating member 11 and the transmission member 12 is four. Further, it is desirable that the transmission member 12 is made of a material that is as light as possible. This is because the inertia inherent to the transmission member 12 is reduced, and it is possible to prevent the rotation of the transmission member 12 from being delayed from the rotation of the rotating shaft 10 as much as possible.

  The circumferential length of each outer peripheral surface (surface facing the rotating member 11) of the transmission member 12 is compared with the circumferential length of the inner peripheral surface (surface facing the transmitting member 12) of the rotating member 11. Thus, it is desirable that it be sufficiently small. By setting the length to such a length, each of the transmission members 12 is moved in the respective directions of the rotation member 11 while rotating around the rotation center line 10L of the rotation shaft 10, and any one of the rotation members 11 is moved. It can be made to contact.

  Moreover, in the inertia control apparatus 1, as shown in FIG.1 and FIG.2, each of the coil spring 13 mentioned above is attached between the rotating shaft 10 and the transmission member 12. FIG. Each of the coil springs 13 has a restoring force in the direction of the rotation shaft 10 and applies a biasing force in the direction of the rotation shaft 10 to the transmission member 12. Therefore, each of the transmission members 12 receives an urging force directed toward the rotation shaft 10.

  The relationship between the restoring force of the coil spring 13 and the centrifugal force generated when the transmission member 12 rotates around the rotation center line 10L of the rotating shaft 10 is desirably the relationship shown below. That is, the restoring force of the coil spring 13 is larger than the centrifugal force generated in the transmission member 12 when the rotating shaft 10 is accelerated and decelerated, and is larger than the centrifugal force generated in the transmitting member 12 when the rotating shaft 10 rotates at a constant speed. Small is desirable. When the rotating shaft 10 is accelerated and decelerated, each of the transmission members 12 does not come into contact with each of the rotating members 11 and does not physically connect the rotating shaft 10 and each of the rotating members 11, and the rotating shaft 10 is at a constant speed. This is because each of the transmission members 12 comes into contact with each of the rotation members 11 and physically connects the rotation shaft 10 and each of the rotation members 11 only when the rotation member 10 is rotated.

  One end of each of the coil springs 13 is attached to each of the transmission members 12 as shown in FIGS. 1 and 2. Here, it is desirable that one end of each of the coil springs 13 is attached to substantially the center of each inner peripheral surface of the transmission member 12 (a surface facing the peripheral surface of the rotating shaft 10). The centrifugal force generated when each of the transmission members 12 rotates around the rotation center line 10 </ b> L of the rotation shaft 10 and the urging force that each of the transmission members 12 receives from each of the coil springs 13 are in the radial direction of the rotation shaft 10. Because it is along. When the centrifugal force and the urging force are along the radial direction of the rotary shaft 10, each of the transmission members 12 does not collide with the peripheral surface of the rotary shaft 10 or the hollow member 110, but along the radial direction of the rotary shaft 10. It can move smoothly.

  On the other hand, the other end of each of the coil springs 13 exists inside the rotating shaft 10 as shown in FIG. Therefore, the inertia control device 1 causes the first hollow portion (hollow portion) 10a (see FIG. 1) reaching the rotation center line 10L from the circumferential surface of the rotation shaft 10 to be in the circumferential direction of the rotation shaft 10 by the number of coil springs 13. (See FIG. 3). And the inertia control apparatus 1 is provided with the center member 102 in the intersection which each 1st hollow part 10a crosses on the rotation centerline 10L. The other end of each coil spring 13 accommodated in each first hollow portion 10a is attached to such a central member 102.

  Here, it is desirable that the diameter of the first hollow portion 10 a that houses each of the coil springs 13 is substantially equal to the length of the coil spring 13 in the radial direction. Since each of the coil springs 13 is firmly held in the first hollow portion 10a, the rotation of each of the coil springs 13 can be prevented from being delayed as much as possible by the inherent inertia of each of the coil springs 13 as much as possible. is there. The length of the portion where the coil spring 13 is exposed from the first hollow portion 10a is preferably as short as possible. This is because the inertia inherent to the coil spring 13 is minimized and it is possible to prevent the rotation of the coil spring 13 from being delayed from the rotation of the rotating shaft 10 as much as possible.

  In the inertia control device 1, each of the transmission members 12 is not in contact with each of the rotating members 11 when the rotating shaft 10 is stopped, accelerated, and decelerated. This is because the centrifugal force that each of the transmission members 12 receives on the radially outer side of the rotating shaft 10 is smaller than the urging force that the coil members 13 receive in the direction of the rotating shaft 10.

  On the other hand, when the rotating shaft 10 rotates at a constant speed, the centrifugal force that each of the transmission members 12 receives on the radially outer side of the rotating shaft 10 receives the biasing force that is received in the direction of the rotating shaft 10 from each of the coil springs 13. Bigger than. Therefore, each of the transmission members 12 moves in each direction of the rotating member 11 against the urging force of each of the coil springs 13 and comes into contact with one of the rotating members 11. At that time, each of the rotating members 11 can rotate around the rotation center line 10 </ b> L of the rotating shaft 10 inside the hollow member 110 because the rotational force of the rotating shaft 10 is transmitted from each of the transmission members 12. it can.

  Here, in the inertia control device 1, the inner peripheral surface of one of the rotating members 11 (the surface facing the transmission member 12) and the outer peripheral surface of the transmission member 12 facing the rotating member 11 (opposed to the rotating member 11). As shown in FIG. 2, permanent magnets M <b> 1 and M <b> 2 may be provided. Note that the polarities of the permanent magnets M1 and M2 are opposite to each other. That is, when the polarity of the permanent magnet M1 is positive, the polarity of the permanent magnet M2 is negative. On the other hand, when the polarity of the permanent magnet M1 is negative, the polarity of the permanent magnet M2 is positive. When the permanent magnets M <b> 1 and M <b> 2 are thus provided, the physical connection between the transmission member 12 and the rotating member 11 becomes strong when the rotating shaft 10 rotates at a constant speed.

  In the inertia control device 1, either one of the permanent magnets M1 and M2 may be provided on the rotating member 11, and the transmission member 12 may be made of a magnetic material. Moreover, either one of the permanent magnets M1 and M2 may be provided in the transmission member 12, and the rotation member 11 may be comprised with the magnetic body. Even in these cases, when the rotating shaft 10 rotates at a constant speed, the physical connection between the transmission member 12 and the rotating member 11 becomes strong.

  Next, the detailed structure of the inertia control device 1 will be described below. FIG. 3 is a diagram for explaining a detailed structure of the inertia control device 1. FIG. 3A shows a front sectional view of the inertia control device 1 when viewed from the direction of the rotation center line 10L. FIG. 3B is a side sectional view of the inertia control device 1.

  As shown in FIG. 3A and FIG. 3B, in the inertia control device 1, the annular hollow member 110 accommodates each of the rotating members 11 along the circumferential direction of the hollow member 110. A second hollow part 110a is provided. Each of the rotating members 11 moves along such an annular second hollow portion 110a. That is, each of the rotating members 11 is guided so as to move along the circumferential direction of the hollow member 110 by the annular second hollow portion 110a. Therefore, each of the rotating members 11 can rotate around the rotation center line 10 </ b> L of the rotating shaft 10. This is because the hollow member 110 is an annular member provided concentrically with the rotating shaft 10 as described above.

  In the inertia control device 1, annular cover members 111 and 112 are provided between the hollow member 110 and the rotating shaft 10 so as to be concentric with the rotating shaft 10. Such annular cover members 111 and 112 are arranged along the axial direction of the rotating shaft 10 with an annular third hollow portion 116a described later interposed therebetween. In the present embodiment, the annular cover members 111 and 112 are resin cover members, but are not limited to this example. That is, the material is not limited.

  In the annular cover members 111 and 112, between the cover member 111 and the cover member 112 along the axial direction of the rotary shaft 10, each of the transmission members 12 and one of the coil springs 13 attached to the transmission member 12 are provided. And an annular third hollow portion 116 a for accommodating the annular guide member 115 that guides the transmission member 12 to rotate along the circumferential direction of the rotation shaft 10 is concentric with the rotation shaft 10. Is provided.

  In the annular third hollow portion 116 a, the annular guide member 115 includes an annular first guide member 113 and an annular second guide member 114, and is provided concentrically with the rotating shaft 10. In the guide member 115, an interval along the axial direction of the rotary shaft 10 is provided between the first guide member 113 and the second guide member 114. Such an interval is an interval required for the guide member 115 to guide each of the transmission members 12 along the circumferential direction of the rotating shaft 10, and thus is substantially equal to the axial length of the rotating shaft 10. It is desirable that the intervals be the same length.

  Each of the transmission members 12 is interposed between the first guide member 113 and the second guide member 114 in the axial direction of the rotary shaft 10. Therefore, each of the transmission members 12 is guided by the guide member 115 so as to rotate along the circumferential direction of the rotation shaft 10. This is because the first guide member 113 and the second guide member 114 are provided concentrically with the rotating shaft 10 as described above. Therefore, each of the transmission members 12 can smoothly rotate along the circumferential direction of the rotating shaft 10 when the rotational force of the rotating shaft 10 is transmitted from the coil spring 13. Accordingly, each of the transmission members 12 can smoothly rotate around the rotation center line 10 </ b> L of the rotation shaft 10 by the rotational force of the rotation shaft 10.

  In the inertia control device 1, each of the transmission members 12 is attached to one end of each of the coil springs 13 having the other end attached to the center member 102 provided on the rotation center shaft 10L of the rotation shaft 10 as described above. It has been. The center member 102 is provided at the intersection 10c where the first hollow portions 10a intersect on the rotation center line 10L of the rotating shaft 10 as described above. As described above, each of the coil springs 13 is accommodated in each of the plurality of first hollow portions 10 a along the circumferential direction of the rotating shaft 10, and has a restoring force toward the rotating shaft 10. Therefore, each of the transmission members 12 is urged toward the rotating shaft 10 by each of the coil springs 13.

  In the present embodiment, each of the coil springs 13 is accommodated in each of the plurality of first hollow portions 10a along the circumferential direction of the rotating shaft 10, and the other end of each of the coil springs 13 is the first hollow portion. Each of 10a is attached to a center member 102 provided at an intersection 10c that intersects on a rotation center line 10L of the rotation shaft 10. However, it is not limited to this example. For example, the other end of each coil spring 13 to which each of the transmission members 12 is attached at one end may be directly attached to the peripheral surface of the rotating shaft 10. In short, each of the coil springs 13 rotates around the rotation center line 10L of the rotating shaft 10 as the rotating shaft 10 rotates, and each of the coil springs 13 rotates with respect to each of the transmission members 12 by a restoring force. It is only necessary that the biasing force is applied in the direction of.

  In such an inertia control device 1, when the rotation shaft 10 is stopped, each of the transmission members 12 does not rotate, so that no centrifugal force is generated outwardly in the radial direction of the rotation shaft 10 with respect to the transmission member 12. Therefore, each of the transmission members 12 is located on the rotating shaft 10 side.

  In the inertia control device 1, during the acceleration of the rotary shaft 10, as described above, the centrifugal force generated in the radially outer side of the rotary shaft 10 in each of the transmission members 12 extends from each of the coil springs 13 toward the rotary shaft 10. Since it is smaller than the applied urging force, it is located on the rotary shaft 10 side as shown in FIGS. 3 (a) and 3 (b). Therefore, the rotating shaft 10 and the rotating member 11 are not physically connected. Therefore, when the rotating shaft 10 is accelerated, the rotating shaft 10 is not given an inertia that inhibits the acceleration of the rotating shaft 10 from the rotating member 11, so that a large torque is not required for the acceleration. Therefore, the burden on the motor that rotates the rotary shaft 10 is suppressed.

  Further, when the rotating shaft 10 is decelerated, a centrifugal force generated radially outward of the rotating shaft 10 in each of the transmission members 12 rotated by the rotating force of the rotating shaft 10 is applied from each of the coil springs 13 toward the rotating shaft 10. It will be less than the force. At that time, each of the transmission members 12 moves in the direction of the rotary shaft 10 by the biasing force applied from each of the coil springs 13. As a result, the physical connection between the rotating member 11 and the transmission member 12 is released. Therefore, when the rotating shaft 10 is decelerated, the rotating shaft 10 is not given inertia from the rotating member 11 so as to inhibit the rotating shaft 10 from decelerating, so that a large torque is not required for decelerating. Therefore, the burden on the motor that rotates the rotary shaft 10 is suppressed.

  FIG. 4 is a view for explaining the detailed structure of the inertia control device 1, and shows a state in which each of the transmission members 12 is in contact with each of the rotation members 11. 4A is a front sectional view of the inertia control device 1 when viewed from the direction of the rotation center line 10L. FIG. 4B is a side sectional view of the inertia control device 1.

  In the inertia control device 1, when the rotational speed of the rotary shaft 10 reaches a constant speed, the following phenomenon occurs. That is, the centrifugal force generated radially outward of the rotation shaft 10 in each of the transmission members 12 rotating around the rotation center line 10 </ b> L of the rotation shaft 10 by the rotation force of the rotation shaft 10 is generated from each of the coil springs 13. Exceeds the urging force given in the direction. Then, each of the transmission members 12 moves outward in the radial direction of the rotating shaft 10 against the urging force applied from each of the coil springs 13. As a result, each of the transmission members 12 comes into contact with any one of the rotating members 11 as shown in FIGS. 4 (a) and 4 (b). At that time, the contact surface 14 is composed of the outer peripheral surface of each of the transmission members 12 (surface facing each of the rotation members 11) and the inner peripheral surface of each of the rotation members 11 (surface facing each of the transmission members 12). Is formed.

  In each of the contact surfaces 14, each rotational force of the transmission member 12 is transmitted to each of the rotational members 11. Therefore, the rotating shaft 10 that applies a rotational force to each of the transmission members 12 is physically connected to each of the rotating members 11 through each of the contact surfaces 14. Accordingly, since the rotational force of the rotating shaft 10 is transmitted to each of the rotating members 11, the rotating member 11 can rotate around the rotation center line 10 </ b> L of the rotating shaft 10.

  Thus, when the rotational speed of the rotating shaft 10 reaches a constant speed, the rotating shaft 10 and the rotating member 11 positioned radially outside the rotating shaft 10 rotate in the same direction while being physically connected. As a result, the inertial mass of the rotating shaft 10 increases. Therefore, a sufficiently large inertia for maintaining the rotation speed of the rotation shaft 10 is given to the rotation shaft 10. Therefore, a sufficiently large inertia is applied to the rotating shaft 10 without imposing a burden on the motor that rotates the rotating shaft 10.

  In particular, when the rotating member 11 is composed of a single annular member, the inertial mass of the rotating member 11 itself increases. Therefore, in the state where the rotating member 11 is physically connected to each of the transmission members 12 and rotating, the inertia for maintaining the rotation speed of the rotating shaft 10 becomes larger.

  By the way, if each of the contact surfaces 14 is not firmly in contact with the rotating member 11, a loss occurs in the rotating force applied to each rotating member 11 by each rotating force of the transmission member 12. Therefore, it is desirable that the frictional force on each of the contact surfaces 14 is large. Therefore, it is desirable that at least the friction coefficient of the outer peripheral surface of the transmission member 12 and the inner peripheral surface of the rotating member 11 is large.

  Thus, when the rotating shaft 10 is rotating at a constant speed, each of the transmission members 12 abuts on each of the rotating members 11 and physically connects the rotating shaft 10 and each of the rotating members 11. To do. Therefore, each of the transmission members 12 functions as a connecting member that physically connects the rotating shaft 10 and each of the rotating members 11. Therefore, each of the transmission members 12 may be made of a light material. This is because the rotating member 11 is physically connected to the rotating shaft 10 to give inertia to the rotating shaft 10.

DESCRIPTION OF SYMBOLS 1 Inertia control apparatus 10 Rotating shaft 10a 1st hollow part 10c Intersection 10L Rotation center line 11 Rotating member 12 Transmission member 13 Energizing member 102 Center member 110 Hollow member 115 Guide member

Claims (9)

A rotating member that is provided concentrically with the rotating shaft to give inertia to the rotating shaft, and is not physically connected to the rotating shaft and capable of rotating around a rotation center line of the rotating shaft; ,
A transmission member provided concentrically with the rotation shaft between the rotation shaft and the rotation member, and capable of rotating around a rotation center line of the rotation shaft by a rotation force of the rotation shaft;
An urging member attached to the rotating shaft and the transmission member, and applying an urging force in the direction of the rotating shaft to the transmission member;
With
The transmission member is
The centrifugal force generated by the rotation around the rotation center line moves in the direction of the rotating member against the urging force by the urging member, contacts the rotating member, and rotates the rotating shaft to the rotating member. An inertia control device characterized by transmitting force. The rotating member includes a permanent magnet having a positive or negative polarity,
The inertia control device according to claim 1, wherein the transmission member includes a permanent magnet having a polarity opposite to that of the permanent magnet included in the rotating member. Either one of the rotating member and the transmission member includes a permanent magnet having a positive or negative polarity,
2. The inertia control device according to claim 1, wherein one of the rotating member and the transmission member not provided with the permanent magnet is made of a magnetic material.   The inertia control device according to any one of claims 1 to 3, further comprising an annular hollow member that is provided concentrically with the rotation shaft and accommodates the rotation member. .   The annular guide member which is provided concentrically with the rotation shaft and guides the transmission member so as to rotate along a circumferential direction of the rotation shaft is further provided. Item 5. The inertia control device according to any one of Items 4 to 6.   The inertia control device according to any one of claims 1 to 5, wherein a plurality of each of the transmission member and the biasing member are provided.   The hollow part which accommodates the said urging member which reaches | attains a rotation center line along the radial direction of the said rotating shaft from the surrounding surface of the said rotating shaft is further provided. The inertia control apparatus as described in any one of Claims. A plurality of hollow portions for accommodating the urging member reaching the rotation center line along the radial direction of the rotation shaft from the circumferential surface of the rotation shaft are provided along the circumferential direction of the rotation shaft,
The center member to which each one end of the urging member accommodated in the hollow portion is attached at an intersection where the hollow portions intersect on the rotation center line is provided. The inertia control device according to claim 6.   The inertia control device according to claim 1, wherein the urging member is an elastic member having a restoring force directed in the rotation axis direction.

Images