KR100520676B1 - Clutch apparatus - Google Patents

Abstract

(Problem) Provided is a clutch device that is improved so that it is possible to increase the transmission torque capacity without increasing the clutch device.

(Solution means) The planetary gear 13, which is engaged with the inner tooth ring gear 22 formed on the outer member 12 and is driven, is rotatably housed in the recess 23 formed in the inner member 11, and the recessed portion ( When a part of the teeth of the planetary gear 13 is engaged with the edge 24 formed at 23, the outer member 12 and the inner member 11 rotate integrally, and the planetary gear 13 with respect to the edge 24 is rotated. In the clutch device 4 in which the outer member 12 and the inner member 11 are rotated relative to each other when the engagement of a part of the teeth is released, a part of the teeth of the planetary gear 13 hangs on the edge 24. The matching operation is performed substantially simultaneously with respect to all of the portions composed of the recess 23 and the planetary gear 13. As a result, the transmission torque is distributed to the plurality of planetary gears, so that the burden of the planetary gears per unit can be reduced.

Description

Clutch device {CLUTCH APPARATUS}

The present invention relates to a clutch device, and more particularly to a clutch device suitable for use as a one-way clutch for preventing the driving side from being driven back on the driven side.

In a facsimile apparatus and a copying machine, in order to selectively rotate and stop the paper feed roller under predetermined conditions, a clutch device is provided between the driven gear and the paper feed roller to which the rotational torque of the motor is constantly applied. As such a clutch device, a one-way clutch using a planetary gear is known (see Japanese Patent Application Laid-Open No. 5-22867).

As shown in Fig. 7, the clutch device of the above-described type is rotatably supported on the same axis as the outer member 12 having the inner tooth ring gear 22 and the outer member 12, and on the outer circumference. An inner member 11 having a plurality of recesses 23 formed therein, and three planetary gears rotatably received in the recesses 23 and meshed with the inner tooth ring gear 22, respectively. (13), for example, when the driving force of the right turn is applied to the outer member 12, the teeth of the planetary gear 13 is engaged with the edge 24 formed on the open side of the recess 23. As a result, when the driving force of the outer member 12 is transmitted to the inner member 11 and the driving force of the right turn is applied to the inner member 11, the engagement of the planetary gear 13 with respect to the edge 24 is released. Transmission of the driving force from the member 11 to the outer member 12 is blocked.

The clutch device of the above-described type is conventionally formed at positions where the contours of the three concave portions are equal to each other and the circumference is divided into three. Moreover, the relationship between the number of teeth of the internal tooth ring gear and the number of recesses was not particularly considered. Therefore, in spite of using three planetary gears, the planetary gears in which the teeth are actually engaged with the edges are only one of them (located at the apex in FIG. 7).

That is, according to the conventional planetary gear type clutch device, since there is only one planetary gear that contributes to torque transmission in the clutch connection state, in order to increase the transmission torque capacity, the tooth thickness or tooth width of the planetary gear should be increased. Inevitably, it was difficult to increase the transmission torque capacity without increasing the clutch device.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems of the prior art, and its main object is to provide an improved clutch device that can increase the transmission torque capacity without increasing the clutch device size.

The present invention for achieving the above object, the planetary gear 13 to rotate in engagement with the inner ring gear 22 formed in the outer member 12 so as to be rotatable in the recess 23 formed in the inner member (11). The outer member 12 and the inner member 11 rotate integrally when the part of the teeth of the planetary gear 13 is engaged with the edge 24 formed in the recess 23. In the clutch device 4 in which the outer member 12 and the inner member 11 are rotated relative to each other when the engagement of a part of the teeth of the planetary gear 13 with respect to the gears of the planetary gear 13 is a part of the teeth of the planetary gear 13. Is set so that the operation of engaging the edge 24 is simultaneously performed for all of the portions composed of the recess 23 and the planetary gear 13 (claim 1).

In this way, since the transmission torque is distributed to the plurality of planetary gears, the burden of the planetary gears per unit can be reduced.

As a technique for simultaneously engaging a part of the teeth of a plurality of planetary gears with corresponding edges, the respective edges of the plurality of recesses are arranged at equal intervals on the same circumference, and the number of teeth of the internal tooth ring gear is made an integer multiple of the number of recesses. (Claim 2), or the distance in the circumferential direction of each edge of the plurality of recesses to have a length not equal to each other (claim 3), or the position of each edge of the plurality of recesses in the radial direction different from each other (claim 4) ).

Embodiment of the Invention

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows typically a part of paper feed mechanism in the facsimile apparatus to which the clutch apparatus which concerns on this invention is applied.

The feeding mechanism 1 includes a pinion 2 directly connected to a drive shaft of a motor (not shown), a driven gear 3 engaged with the pinion 2, and a clutch device 4 connected to the driven gear 3. Consists of a feed roller (5) connected through. In the paper feed mechanism 1, the pinion 2 rotates at all times during operation of the facsimile machine, and the torque transmission from the driven gear 3 to the paper feed roller 5 is controlled by the action of the solenoid lock mechanism 6. It is interrupted by the clutch device 4 which acts by it.

2 to 4 show a clutch device 4 according to the invention.

The clutch device 4 is rotatably supported by the inner member 11 and the inner member 11 which are coupled to the central axis 7 of the paper feed roller 5 by, for example, key means. The planetary gear 13 is rotated on the outer member 12, the planetary gear 13 provided between the inner member 11 and the outer member 12, and the shaft 15 protruding from the disc portion 14. Axial gear base 16 rotatably supported by inner member 11 and outer member 12 in a supported state and axial movement to cylindrical shaft portion 17 of planetary gear base 16. Of the planetary gear base 16 for interlockingly connecting the clutch release member 18 and the planetary gear base 16 and the clutch release member 18 together with impingement force with such a force. It consists of a torsion spring (19) wound and mounted on a cylindrical shaft (17).

The outer member 12 is provided with a driven gear 3 constituting an outer tooth ring gear engaged with the pinion 2 on its outer circumferential surface, and an inner tooth ring gear 22 with which the planetary gear 13 is engaged. It is formed in the inner peripheral surface.

On the outer periphery of the inner member 11, roughly semicircular recesses 23 opened radially outward are formed at positions where the circumference is divided into three. The three recesses 23 accommodate a planetary gear 13 supported by the planetary gear base 16 and engaged with the inner ring gear 22. In addition, one side (the rotation direction front side of the outer member 12) with respect to the circumferential direction in the opening side of each recessed part 23 is parallel to the tangent of the circumferential circle of the inner member 11, and of the planetary gear 13 is carried out. Cut along the surface S passing through the center, the edge 24 which one of the teeth of the planetary gear 13 engages is formed in each of the three recesses 23 by this.

As described above, the clutch device 4 is provided with a solenoid lock mechanism 6. The lock mechanism 6 hinges one end of the solenoid 32 fixed to the stay member 31 which is substantially non-rotable, the solenoid base 33 and contacts the other end of the clutch release member 18. It consists of a stopper member 35 carried by the coil spring 34 in the direction.

And the clutch release member 18 is provided with the protrusion 27 which engages with the other end of the stopper member 35 in the suitable position of the circumferential direction.

Subsequently, the operation of the clutch device of the present invention will be described.

Usually, the driving force of the motor is applied to the driven gear 3 (that is, the outer member 12) composed of an outer tooth ring gear through the pinion 2 directly connected to the drive shaft of the motor, and the outer member ( 12) is always spinning.

On the other hand, the solenoid 32 is designed to interrupt the current under a predetermined condition, and when excited, the stopper member 35 as the armature is attracted to the core of the solenoid 32, so that the clutch release member 18 When the other end of the stopper member 35 is dropped from the protrusion 27, rotation of the clutch release member 18 is permitted (state of solid line in Fig. 2), and when the element is deformed, it is applied to the holding force of the coil spring 34. As a result, the other end of the stopper member 35 is engaged with the protrusion 27 of the clutch release member 18 (state of the imaginary line in Fig. 2), whereby rotation of the clutch release member 18 is prevented.

In the state where the solenoid 32 is excited and the stopper member 35 is separated from the protrusion 27 of the clutch release member 18, the planetary gear connected to interlock with the clutch release member 18 through the torsion spring 19. The base 16 is also free with the clutch release member 18. In this state, no load is applied to the torsion spring 19 so that no reaction force is generated.

Since the direction of the arrow A in FIG. 4, that is, the torque of the right turn is always acting on the outer member 12, when the planetary gear 13 rotates to the right by engagement with the inner tooth ring gear 22, the planetary gear 13 is rotated. The tooth is engaged with the edge 24 formed on the open side of the recess 23 by being separated from the rear side wall with respect to the rotational direction in the recess 23. Therefore, the inner member 11 and the outer member 12 are integrally coupled through the planetary gear 13, so that the driving force of the motor is transmitted to the paper feed roller 5 coupled to the inner member 11.

When the solenoid 32 is element, the other end of the stopper member 35 is approached by the coil spring 34 toward the clutch release member 18. And when the protrusion 27 is caught by the other end of the stopper member 35, the clutch release member 18 is stopped.

Here, since the clutch release member 18 and the planetary gear base 16 are elastically engaged with the torsion spring 19, when the clutch release member 18 stops rotating, the torsion spring 19 is bent. As a result, the engagement force of the teeth of the planetary gear 13 with respect to the edge 24 of the recess 23 is relaxed. In this case, the pressing force of the torsion spring 19 is such that the teeth are removed from the edge 24 in the direction of bringing the planetary gear 13 closer to the rear side wall with respect to the rotational direction in the recess 23. Because of the acting direction, the engagement of the teeth of the planetary gear 13 with respect to the edge 24 of the recess 23 is completely released.

As a result, the torque transmission between the inner member 11 and the outer member 12 is interrupted, and the outer member 12 idles, so that the paper feed roller 5 stops.

In addition, in order to reduce the burden on the planetary gears per one and increase the actual transmission torque capacity of the clutch device 4, the three planetary gears 13 simultaneously hang on the corresponding edges 24 in the present invention. It can be adjusted.

Specifically, as shown in FIG. 5, the respective edges 24 of the three recesses 23 are arranged on the same circumference at equal intervals (A = B = C = 120 °) and the inner ring gear 22 The number of teeth of the () is set to an integer multiple of the number (three) of the recesses 23, for example 48. As a result, since the rotation angles of the three planetary gears 13 are synchronized with each other, three planetary gears are formed at each edge 24 of the three recesses 23 arranged at the same interval on the same circumference. The tooth of (13) is engaged at the same time.

As a method of simultaneously engaging the teeth of the three planetary gears 13 to the respective edges 24 of the three recesses 23, as shown in Fig. 6, the rotation angle between the three planetary gears 13 is shown. To correspond to the difference, the lengths of the three recesses 23 in each of the edges 24 in the radial direction are equal (a = b = C), but the distances in the circumferential direction are not equal to each other (A ≠ B ≠ C Or the same interval (A = B = C) in the circumferential direction of each edge 24 of the three recesses 23, but not in the same radial position (a ≠ b ≠ c) It may be one.

As described above, according to the present invention, since the transmission torque is distributed to the plurality of planetary gears, that is, the burden of one planetary gear can be reduced, the transmission torque capacity can be increased without increasing the tooth size of the planetary gears. You can increase it. Therefore, according to the present invention, a great effect can be achieved by increasing the transmission torque capacity of the clutch device without enlarging the size.

1 is a schematic perspective view of a drive mechanism of a paper feed roller to which the present invention is applied.

2 is a top view of a state in which the solenoid lock mechanism of the clutch device according to the present invention is mounted;

3 is a longitudinal cross-sectional view taken along line III-III of FIG. 4 of the clutch device according to the present invention;

4 is a side view of the lower half of the clutch device according to the present invention cut out along the line IV-IV of FIG.

5 is an explanatory diagram showing the relationship between the respective parts showing the clutch connection state according to the embodiment of the present invention;

6 is an explanatory diagram showing the relationship between the respective parts showing the clutch connection state according to another embodiment of the present invention;

Fig. 7 is an explanatory diagram showing the relationship between the respective parts showing the conventional clutch connection state;

Explanation of symbols on the main parts of the drawings

1-Feed mechanism 2-Pinion

3-Driven Gear 4-Clutch Unit

5-Feed roller 6-Solenoid lock mechanism

7-central axis 11-inner member

12-Outer member 13-Planetary gear

14-disc 15-shaft

16-Planetary Gear Base 17-Cylindrical Shaft

18-clutch release member 19-torsion spring

22-internal gear ring 23-recessed

24-edge

Claims (4)

An outer member having an inner tooth ring gear, an inner member rotatably supported on the same axis as the outer member, and having a plurality of recesses on an outer circumference thereof, and rotatably housed respectively in the plurality of recesses It has a plurality of planetary gears that mesh with the ring gear, When a part of the teeth of the planetary gear is engaged with an edge formed on the open side of the concave portion with respect to the outer circumferential surface of the inner member, the outer member and the inner member rotate integrally, and the teeth of the planetary gear with respect to the edge When the engagement of the part is released, the outer member and the inner member is made to rotate relatively, A clutch device in which part of the teeth of the planetary gear is engaged with the edge is simultaneously performed for both the concave portion and the portion composed of the planetary gear. The method according to claim 1, A clutch device, wherein the respective edges of the plurality of recesses are arranged on the same circumference at equal intervals and the number of teeth of the inner tooth ring gear is an integer multiple of the number of the recesses. The method according to claim 1, A clutch device, wherein intervals in the circumferential direction of the respective edges of the plurality of recesses are not equal to each other. The method according to claim 1, A clutch device, wherein positions of the respective edges of the plurality of recesses in the radial direction are different from each other.