JP2657443B2 - Rotation transmission unit and variable speed rotation device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation transmission unit using a one-way clutch and a torsion coil spring, and by using this unit, the speed is periodically increased in conjunction with the rotation of a drive shaft such as a motor. The present invention relates to a speed change rotating device that repeats deceleration.

[0002]

2. Description of the Related Art Conventionally, as a device for changing a rotation speed, a device using a pulse motor, a servomotor, or the like is known. In these devices, an operation signal is sent from a control circuit to a motor so that a desired rotation speed is obtained.

[0003] In mechanical elements, a cam mechanism or the like is often used in order to change the movement speed.

Further, in order to change the feeding speed in a feeding mechanism such as a belt conveyor, the amount of movement is detected by various sensors, and a driving device is controlled based on the signal.

[0005]

Various devices can be adopted as the device for shifting the mechanical motion as described above, but all of them have a problem that the structure is complicated and the manufacturing cost is high. there were.

That is, in a device using a pulse motor, a servo motor, or the like, these motors themselves are expensive, and a control circuit for sending an operation signal to these motors is required. Becomes

Further, in a speed change motion device using a cam mechanism or the like, a high precision is required in the design and manufacture of the cam, and an interlocking mechanism around the cam is required in order to realize a desired motion. Becomes large, and the manufacturing cost becomes high.

Further, a device for detecting and controlling the feed of a belt conveyor or the like by a sensor can easily realize, for example, intermittent feed, but it is difficult to realize a speed-changed feed in which speed increase and deceleration are repeated. is there.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rotation transmission unit capable of performing variable-speed rotation, and a transmission rotation device that uses the rotation transmission unit to periodically increase and decrease the speed. Is to do.

[0010]

In order to achieve the above object, a rotation transmission unit according to the present invention comprises a first split shaft (31) and a second split shaft (33) which are coaxially butted.
A first clutch housing (40) mounted on an end of the first split shaft (31) via a first one-way clutch (39); and a second clutch housing (40) mounted on an end of the second split shaft (33).
A second clutch housing (45) mounted via a one-way clutch (44), the first clutch housing (40) and the second clutch housing (45);
A first torsion coil spring (51) having both ends crimped and fixed to the first clutch housing (40) of the first split shaft (31) in the axial direction of the first clutch housing (40) or a third one-way clutch (35). ), A fourth gear (41) fixed to the second split shaft (33) axially outside the second clutch housing (45), and the fourth gear (41). A third clutch housing (38) mounted via a fourth one-way clutch (37) on the outer periphery of the boss unit integral with the third gear (36), and a fifth clutch housing (38) integral with the fourth gear (41). A fourth clutch housing (43) mounted via a one-way clutch (42), and both ends crimped and fixed to the third clutch housing (38) and the fourth clutch housing (43); Serial first torsion coil spring (51)
And a second torsion coil spring (53) whose winding direction is opposite to that of the first one-way clutch (39) and the fifth torsion coil spring (53).
The one-way clutch (42) meshes at a high speed outside in the rotation direction (B) of the first and second split shafts (31, 33), and the second one-way clutch (44) and the third one-way clutch (35). ) And the fourth one-way clutch (37) are connected to the first and second split shafts (3
It is characterized in that it meshes at an inner high speed with respect to the rotation direction (B) of (1, 33).

Further, in the speed change rotating device of the present invention, an input shaft (16) is arranged in parallel with the first divided shaft (31) and the second divided shaft (33) of the rotation transmitting unit, and the input shaft ( 16), a first gear (19) and a second gear via a sixth one-way clutch (24), one of which is directly engaged with the other at the inner high speed with respect to the rotation direction (A) of the input shaft (16). (25) is attached, and the rotation direction (A) of the input shaft (16) is provided on the outer periphery of the boss portion integral with the first gear (19).
A fifth clutch housing (21) is mounted via a seventh one-way clutch (20) that meshes with the inside at a high speed, and any one of the side surface of the first gear (19) and the end surface of the fifth clutch housing (21) is provided. On one side, a ball plunger (22) is buried, and on the other side, holes for fitting the ball plunger (22) are formed at predetermined angles, and the outer periphery of the boss portion integral with the second gear (25) and the second 5 Both ends are fixed to the outer periphery of the clutch housing (21) by crimping,
A third torsion coil spring (26) having the same winding direction as the second torsion coil spring (53) is mounted, and the input shaft (1
6) engaging the first and second gears (19, 25) with the third and fourth gears (37, 41) of the first and second split shafts (31, 33), respectively; When the input shaft (16) rotates, the first and second split shafts (3
1, 33) so that there is a rotation difference between the third and fourth gears (37, 41).
7, 41) is set.

[0012]

According to the rotation transmission unit of the present invention, for example,
When a third gear mounted on the first split shaft and a fourth gear mounted on the second split shaft are rotated at different speeds in either direction, one gear is driven by the other gear due to the rotation difference. , And either one of the first torsion coil spring and the second torsion coil spring is tightened according to the direction of rotation. When the torsion coil spring is fully tightened, the spring force is released, the speed of the slower rotating gear is increased, and the speed of the split shaft linked to the gear is increased. After the spring force is released in this manner, the increased split shaft returns to the original rotation speed, but the coil spring starts to be tightened again due to the rotation difference of the gear,
The above operation will be repeated. In this way, a speed change operation in which speed increase and deceleration are repeated with one of the divided shafts as the output shaft is obtained. The torsion coil spring that is not tightened has an effect of preventing overrun when the rotation input is stopped.

Further, in the rotation transmitting unit according to the present invention, even if one gear is rotated relative to the other gear in any direction, either one of the first torsion coil spring and the second torsion coil spring is rotated. Since a force acts to return the gears by tightening, for example, with respect to a pair of gears mounted on the input shaft, one of the gears of the rotation transmission unit is relatively moved with respect to the other. When the gears are engaged with each other in the direction of rotation, the gear teeth of the rotation transmission unit abut against the gear teeth of the input shaft in a state of being elastically pressed.
Therefore, transmission of rotation from the input shaft to the split shaft can be performed without backlash. When this rotation transmission unit is used as a backlash prevention mechanism, a pair of gears having the same number of teeth may be simply fixed to the input shaft, and the gears of the rotation transmission unit have the same number of teeth. Is fine.

According to the speed change rotating device of the present invention, when the input shaft is rotated in a predetermined direction, the third gear of the first split shaft meshed with the input shaft via the first gear and the second gear of the input shaft and the third gear. The fourth gear of the second split shaft rotates. At this time, since the number of gear teeth is set so that a rotation difference occurs between the third gear of the first split shaft and the fourth gear of the second split shaft, the first split shaft and the second split shaft Either the first torsion coil spring or the second torsion coil spring mounted on the second coil spring is tightened. Now, assuming that the second torsion coil spring is wound,
When the second torsion coil spring is fully tightened, the spring force is released, the speed of the slower rotating gear is increased, and the speed of the split shaft linked to the gear is increased. The gear on the input shaft side meshing with the gear of the divided shaft thus increased rotates faster than the other gear on the input shaft side, and this time the third torsion coil spring mounted on the input shaft side rotates. It can be wound up. When the third torsion coil spring is maximally tightened, the ball plunger fitted to one of the gears on the input shaft side is disengaged, the clutch housing rotates, and the spring force is released. Then, the increased speed of the divided shaft returns to the original rotation speed, but the operation is repeated because the second torsion coil spring starts to be tightened again by the rotation difference. In this way, a speed change operation that repeats speed increase and deceleration, which is switched with a click feeling of the ball plunger, is obtained.

[0015]

FIG. 1 is a longitudinal sectional view showing one embodiment of the speed change rotating device of the present invention. The speed change rotating device includes the rotation transmitting unit of the present invention.

In this device, a pair of support plates 11 and 12 are arranged in parallel and their four corners are connected by four columns 13 to form a frame. A synchronous motor 14 is mounted on one support plate 11 and its drive shaft 1
5 protrudes inside the support plate 11. Also, the support plate 1
An input shaft 16 is inserted through each of the first and second shafts 12. One end of the input shaft 16 is connected to the drive shaft 15 by a coupling 17, and the other end is supported by a bearing 18.

A first gear 19 is fixed to the portion of the input shaft 16 close to the drive shaft 15 by press fitting. Also,
A fifth clutch housing 21 is mounted on the outer periphery of the boss portion integral with the first gear 19 via a seventh one-way clutch 20 that is fitted by an internal high-speed left rotation (rotation in the direction of arrow A). Here, the inside high-speed left rotation means that the inside (the first gear 19) rotates leftward (in the direction of arrow A) relative to the outside (the fifth clutch housing 21), and the following one-way clutch is used. In the description, a similar expression will be used. Then, on the side surface of the first gear 19 adjacent to the fifth clutch housing 21,
A ball plunger 22 that is pressed against the flange surface of the fifth clutch housing 21 by a spring is mounted. Correspondingly, the ball plunger 22 fits on the flange surface of the fifth clutch housing 21 by a predetermined angle. A hole is formed. Ball plunger 22
Are arranged along the circumferential direction, and the first gear 1
When the fifth clutch housing 21 rotates by a predetermined angle with respect to 9, the holes are sequentially fitted into the holes.

A spacer 23 is provided between the first gear 19 and the first gear 19.
A second gear 25 is mounted near the end on the opposite side of the input shaft 16 via a sixth one-way clutch 24 fitted by high-speed left rotation inside. The outer periphery of the fifth clutch housing 21 and the second gear 25
A right-handed third torsion coil spring 26 is attached so as to connect the outer periphery of the boss portion integrated with the boss portion. Both ends of the third torsion coil spring 26 are fixed to the outer periphery of the fifth clutch housing 21 and the outer periphery of the boss portion of the second gear 25 by crimping, and the inner periphery of the third torsion coil spring 26 and the spacer 23
A predetermined gap is formed between the outer circumference and the outer circumference.

A first split shaft 31 is inserted into and supported by the support plate 11 via a bearing 32 in parallel with the input shaft 16. A second split shaft (output shaft) 33 is inserted through and supported by the other support plate 12 via a bearing 34 coaxially with the first split shaft 31 and with its ends abutting. The second split shaft 33 forms an output shaft of the speed change rotating device, and various drive mechanisms (not shown) are connected to the shaft.

The third one-way clutch 3 is engaged with the first split shaft 31 by rotating inward at high speed (rotation in the direction of arrow B).
5, a third gear 36 is mounted.
The gear 36 meshes with the first gear 19. In addition,
The third one-way clutch 35 is not always necessary, and the third gear 36 may be fixed to the first split shaft 31. A third clutch housing 38 is mounted on the outer periphery of the boss portion integral with the third gear 36 via a fourth one-way clutch 37 that is fitted by high-speed right rotation inside.
Further, the end of the first split shaft 31 is reduced in diameter, and the first clutch housing 40 is mounted on the outer periphery of the first split shaft 31 via a first one-way clutch 39 fitted to the outer periphery at a high speed clockwise rotation.

A fourth gear 41 is fixed to the second divided shaft 33, and the fourth gear 41 meshes with the second gear 25. Further, a fourth clutch housing 43 is mounted on the outer periphery of the boss portion integral with the fourth gear 41 via a fifth one-way clutch 42 which is fitted by an outer high-speed clockwise rotation. The distal end of the second split shaft 33 has a reduced diameter, and a second clutch housing 45 is mounted on the outer periphery of the second split shaft 33 via a second one-way clutch 44 which is fitted in the inner high-speed clockwise rotation.

Between the clutch housings 40 and 45,
A left-handed first torsion coil spring 51 having both ends crimp-fixed thereto is mounted. A cylindrical spacer 52 is disposed outside the first torsion coil spring 51, and both end surfaces of the spacer 52 are in contact with inner end surfaces of the clutch housings 38 and 43. Outside the spacer 52, the clutch housings 38, 4
3, a right-handed second torsion coil spring 53 having both ends crimp-fixed thereto is mounted.
A predetermined gap is formed between the inner periphery of the torsion coil spring 53 and the outer periphery of the spacer 52.

The number of teeth of each of the first gear 19, the second gear 25, the third gear 36, and the fourth gear 41 is such that when the input shaft 16 rotates at a predetermined speed to the left (in the direction of arrow A), The third gear 36 is set to rotate rightward (in the direction of arrow B) at a higher speed than the fourth gear 41. For example, if the number of teeth of the first gear 19 is set to 80, the number of teeth of the second gear 25 is set to 60, the number of teeth of the third gear 36 is set to 40, and the number of teeth of the fourth gear 41 is set to 60, in the initial operation, 1st gear 1
The third gear 36 to which the rotational force is transmitted from the input shaft 16
The fourth gear 41 that rotates at twice the speed of the second gear 25 and receives the torque from the second gear 25 rotates at the same speed as the input shaft 16, and the third gear 36 rotates twice as fast as the fourth gear 41. It will rotate at speed.

In the above, the split shafts 31 and 33, the one-way clutches 39 and 44, and the first torsion coil spring 51
A unit including the third gear 36, the fourth gear 41, the one-way clutches 37 and 42, the second torsion coil spring 53, and the like around the divided shafts 31 and 33 constitutes an embodiment of the rotation transmitting unit in the present invention. Make up.

Next, the operation of the speed change rotating device will be described. In the following description, for convenience, the number of teeth of the first gear 19 is 80, the number of teeth of the second gear 25 is 60,
The case where the number of teeth of the gear 36 is set to 40, the number of teeth of the fourth gear 41 is set to 60, and the input shaft 16 is rotated leftward (in the direction of arrow A in the drawing) at 60 rpm will be described. Even if the number of gear teeth and the rotation speed of the input shaft 16 are set to different values, it goes without saying that the same effect can be obtained.

First, it is assumed that the input shaft 16 starts rotating leftward (in the direction of arrow A in the figure) at a predetermined speed, for example, 60 rpm. At the beginning of the operation, the first
The gear 19 and the second gear 25 mounted via the sixth one-way clutch 24 that is fitted to the input shaft 16 by the inner high-speed left rotation rotate at the same speed as the input shaft 16, that is, at 60 rpm. However, the third gear 36 of the first split shaft 31 meshing with the first gear 19 of the input shaft 16 rotates rightward (in the direction of arrow B in the figure) at twice the speed of the input shaft 16, that is, at 120 rpm. The fourth gear 41 of the second split shaft 33 meshing with the second gear 25 of the input shaft 16 has the same speed as the input shaft 16,
That is, it rotates rightward (in the direction of arrow B in the figure) at 60 rpm.

As a result, the third gear 36 becomes the fourth gear 41
Will rotate to the right at twice the speed of. And
The third clutch housing 38, to which one end of the second torsion coil spring 53 is fixed, has the same speed as the third gear 36, ie, 120, since the clutch 37 is engaged by the inner high-speed clockwise rotation.
The right torsion is rotated at rpm.
The fourth clutch housing 43, to which the other end is fixed, can rotate only at the same speed as the fourth gear 41, that is, 60 rpm at least at the beginning of operation, because the clutch 42 is engaged by the outer high-speed clockwise rotation. For this reason, a tightening force is generated in the second torsion coil spring 53, and the second torsion coil spring 53 is tightened and reduced in diameter. When the inner periphery of the second torsion coil spring 53 comes into close contact with the outer periphery of the spacer 52, the second torsion coil spring 53 cannot be further tightened, and releases energy due to the spring distortion. That is, the fourth clutch housing 43,
The speed of the fourth gear 41 and the second split shaft (output shaft) 33 is increased to a speed higher than the speed of the third clutch housing 38 and the third gear 36 (speed exceeding 120 rpm), whereby the torsion of the second torsion coil spring 53 is increased. Is restored. As a result, the speed of the second divided shaft 33 forming the output shaft is increased.

When the speed of the fourth gear 41 is increased, the speed of the second gear 25 meshing therewith is also increased. At this time, the sixth one-way clutch 24 rotates the outer high-speed left rotation (in the direction of idling)
Therefore, the second gear 25 is caused to idle with respect to the input shaft 16. The third torsion coil spring 26 having one end fixed to the outer periphery of the boss portion of the second gear 25 also tries to rotate together with the second gear 25, but the fifth torsion coil spring 26 to which the other end of the third torsion coil spring 26 is fixed. The clutch housing 21 is fitted to the first gear 19 via a ball plunger 22,
Since the gear 19 is integral with the input shaft 16, it cannot rotate faster than the input shaft 16. As a result, this time, the third torsion coil spring 26 has a winding action, and the third torsion coil spring 26 is tightly wound. And, when the inner circumference of the third torsion coil spring 26 comes into close contact with the outer circumference of the spacer 23 and cannot be further tightened, or when the repulsive force due to the tightening of the third torsion coil spring 26 exceeds a predetermined value. Then, the ball plunger 22 is pushed in against the urging force of the spring, the fifth clutch housing 21 slides against the gear 19 and rotates, and the distortion energy of the third torsion coil spring 26 is released. Then, the sliding of the fifth clutch housing 21 with respect to the gear 19 stops when the ball plunger 22 is fitted into the next hole of the fifth clutch housing 21.

On the other hand, when the distortion energy of the second torsion coil spring 53 is released, the fourth gear 41 is decelerated again and decreases to the original rotational speed of 60 rpm or a speed close thereto, and the fourth gear 41 meshes therewith. The rotation speed of the second gear 25 also decreases. Thereafter, the rotation difference between the third gear 36 and the fourth gear 41 causes the second torsion coil spring 5 to rotate.
3 will be re-tightened, and the above-described operation will be repeated. As a result, the second divided shaft 33 serving as an output shaft performs an operation of periodically repeating acceleration and deceleration, and periodically performs acceleration and deceleration from the drive shaft 15 of the motor 14 rotating at a constant speed. , It is possible to obtain a rotating operation that repeats the above.

When the drive shaft 15 of the motor 14 is stopped,
The input shaft 16 connected to the drive shaft 15 stops, and the input shaft 1
6 and the third gear 26 meshed with the first gear 19
Stops. However, the second gear 25 can rotate counterclockwise with respect to the input shaft 16 via the sixth one-way clutch 24, and the fourth gear 41 meshing therewith can also rotate idle. As a result, the second split shaft 33 serving as the output shaft tends to overrun due to the inertia on the load side. However, since the second clutch housing 45 attached to the distal end of the second split shaft 33 engages with the second split shaft 33 through the second one-way clutch 44 by rotating inward at a high speed to the right, the second split shaft 33 is engaged. And try to rotate with it. On the other hand, the first split shaft 31 cannot move because the first split shaft 31 meshes with the third gear 36 through the third one-way clutch 35 at the inside high-speed clockwise rotation. In addition, the first clutch housing 40 mounted on the distal end portion of the first split shaft 31 cannot be moved because the first clutch housing 40 is fitted to the first split shaft 31 through the first one-way clutch 39 by the outer high-speed clockwise rotation. . As a result, a tightening force acts on the first torsion coil spring 51 mounted between the clutch housings 45 and 40, and overrun is prevented.

In the above-described embodiment, a one-way clutch may be interposed between the drive shaft 15 of the motor 14 and the coupling 17 of the input shaft 16 so as to be engaged at an inner high-speed left rotation. According to this, the third torsion coil spring 2
When the coil 6 is tightened, the strain energy is released, the speed of the first gear 19 and the third gear 36 meshing with the first gear 19 are increased, and the tightening of the second torsion coil spring 53 is accelerated. And the second torsion coil spring 53 and the third
When the torsion coil spring 26 is alternately tightened while accelerating the cycle, and the spring force accumulated in both coil springs exceeds the fitting force due to the pressing of the ball plunger 22, the ball plunger 22 comes off and the fifth clutch housing 21 slips. And the strain energy will be released.

The above embodiment is merely an embodiment of the present invention, and the spring force of each of the torsion coil springs 53 and 26 and the pressing force of the ball plunger 22 are adjusted.
By changing the number of teeth of 5, 36, and 41, various operations other than those described above can be obtained.

[0033]

As described above, according to the present invention,
From the drive shaft of the motor that rotates at a constant speed, it is possible to obtain a fluctuating rotational movement in which the speed is repeatedly increased and decreased at a constant cycle. This speed change rotation device is used for various speed change motion mechanisms, for example, used in place of a cam mechanism for changing the speed of movement, or used for a drive mechanism for changing the speed of feeding of a belt conveyor or the like. can do. Further, in the rotation transmission unit of the present invention, when one of the gears is rotated relative to the other gear, the torsion coil spring of either the first torsion coil spring or the second torsion coil spring is wound and tightened. By meshing with the gear mounted on the input shaft in this state, the gear teeth on the split shaft side can be brought into elastic contact with the gear teeth on the input shaft side by pressing and also as a backlash prevention mechanism. Can be used.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a speed change rotating device according to the present invention.

[Explanation of symbols]

 Reference Signs List 14 motor 15 drive shaft 16 input shaft 19 first gear 20 seventh one-way clutch 21 fifth clutch housing 22 ball plunger 24 sixth one-way clutch 25 second gear 26 third torsion coil spring 31 first split shaft 33 second split shaft ( Output shaft) 35 Third one-way clutch 36 Third gear 37 Fourth one-way clutch 38 Third clutch housing 39 First one-way clutch 40 First clutch housing 41 Fourth gear 42 Fifth one-way clutch 43 Fourth clutch housing 44 Second one-way Clutch 45 Second clutch housing 51 First torsion coil spring 53 Second torsion coil spring

Claims (2)

(57) [Claims] A first split shaft (31) and a second split shaft (33) coaxially butted with each other, and an end of the first split shaft (31) via a first one-way clutch (39). A first clutch housing (40) mounted on the second split shaft (33), a second clutch housing (45) mounted on an end of the second split shaft (33) through a second one-way clutch (44), and the first clutch housing (45). A first torsion coil spring (51) having both ends crimped and fixed to the clutch housing (40) and the second clutch housing (45), and the first clutch housing (40) of the first split shaft (31); ), And a third gear (36) fixedly attached to the outside of the second clutch housing (45) via a third one-way clutch (35), and an axially outside of the second clutch housing (45) of the second split shaft (33). Solid Fourth gear (41)
A third clutch housing (38) mounted via a fourth one-way clutch (37) on the outer periphery of the boss portion integral with the third gear (36); and a boss portion integral with the fourth gear (41). A fourth clutch housing (43) mounted on the outer periphery via a fifth one-way clutch (42), and both ends are crimped and fixed to the third clutch housing (38) and the fourth clutch housing (43). A second torsion coil spring (53) whose winding direction is opposite to the first torsion coil spring (51), wherein the first one-way clutch (39) and the fifth one-way clutch (42) The first and second division axes (31, 3
The second one-way clutch (44), the third one-way clutch (35), and the fourth one-way clutch (37) are engaged with each other at a high speed outside in the rotation direction (B) of 3). A rotation transmission unit characterized in that it meshes at a high speed inside in the rotation direction (B) of the divided shafts (31, 33). 2. An input shaft (16) is arranged parallel to the first divided shaft (31) and the second divided shaft (33) of the rotation transmitting unit according to claim 1, and the input shaft (16) has: The sixth one-way clutch (2) meshes with one directly and the other at an inner high speed with respect to the rotation direction (A) of the input shaft (16).
4) via a first gear (19) and a second gear (25)
Is mounted on the outer periphery of the boss portion integrated with the first gear (19).
Via a seventh one-way clutch (20) which meshes at a high speed inward with respect to the rotation direction (A) of the input shaft (16),
A fifth clutch housing (21) is mounted, and a side surface of the first gear (19) and the fifth clutch housing (21).
A ball plunger (22) is buried in one of the end faces, and a hole into which the ball plunger (22) fits is formed at a predetermined angle on the other end, and a boss portion integral with the second gear (25) is formed. Outer circumference and the fifth clutch housing (21)
Both ends of the input shaft (16) are fixed to the outer periphery of the input shaft (16) by crimping and fixing both ends thereof, and a third torsion coil spring (26) having the same winding direction as the second torsion coil spring (53) is attached. 2 gears (19, 25) and the third and fourth gears (37, 41) of the first and second split shafts (31, 33).
When the input shaft (16) rotates, a difference in rotation between the third and fourth gears (37, 41) of the first and second split shafts (31, 33) is generated. A variable-speed rotating device characterized in that the number of teeth of each of the gears (19, 25, 37, 41) is set so as to be generated.