JP6909098B2 - Geared motor - Google Patents

Description

The present invention relates to a geared motor assembly technique.

In Patent Document 1 below, a filter such as a ventilation port is reciprocated by a shaft body driven by a differential gear mechanism, and a cleaning member attached to the shaft body rotating in a predetermined angle range adheres to the filter. A filter drive device for removing foreign matter is disclosed.

JP-A-2017-60284

Some of the gear members that make up a geared motor have a fixed arrangement angle when they are assembled. If such a gear member is assembled without interference with other members other than the regular arrangement angle, the operator may assemble the gear member at an incorrect arrangement angle.

In view of the above problems, an object to be solved by the present invention is to provide a geared motor capable of suppressing malfunction due to incorrect assembly of gear members.

In order to solve the above problems, the geared motor of the present invention drives the drive source, the drive gear which is a gear member, the driven gear which is a gear member meshed with the drive gear, and the drive force of the drive source. The drive gear includes a power transmission member that transmits to the gear, the drive gear reciprocates in a predetermined angle range in the circumferential direction by the power transmission member, and one of the drive gear and the driven gear is a gear member. It has a gear portion that meshes with the other gear member and an engaging piece that is a protruding portion that protrudes radially outward from the gear portion, and the gear portion and the engaging piece are the one gear member. The first locking portion and the second locking portion for restricting the turning of the engaging piece are provided at both ends of the turning range of the engaging piece, and are arranged at different positions in the axial direction of the above. The 1 locking portion constitutes a part of the other gear member, and the gear portion and the first locking portion are arranged at different positions in the axial direction of the other gear member. It is a feature.

By having the above-mentioned features, the geared motor of the present invention can suppress erroneous assembly while ensuring a degree of freedom in turning angle.

Further, in the geared motor of the present invention, the driven gear may have the engaging piece, and the driving gear may have the first locking portion.

Further, the first locking portion may be formed on a flat surface portion provided on the end surface of the other gear member.

Further, the first locking portion is preferably a ridge portion extending from the outer edge of the flat surface portion of the other gear member toward the center in the radial direction.

For example, when a cylindrical rib is used as the first locking portion and the distance from the outer edge forming the rib is different from the outer edge of the flat surface portion toward the center side in the radial direction, the engaging piece becomes a rib. The turning angle of the other gear member at the time of contact will be different. In the geared motor of the present invention, since the first locking portion is a ridge portion extending radially from the outer edge of the flat surface portion of the other gear member toward the center side in the radial direction, when the engaging piece comes into contact with the first locking portion. The turning angle of the other gear member can be the same. Therefore, it is possible to make line or surface contact with the engaging piece. Thereby, the contact range between the first locking portion and the engaging piece can be widened.

Further, the engaging piece is formed continuously from the end portion of one of the tooth portions of the one gear in the tooth width direction, and protrudes in the same direction as the toothing direction of the tooth portion. preferable.

The engaging piece is formed continuously from the base end portion toward the tip end portion by being integrated with the end portion of the tooth portion in the tooth width direction. Therefore, the engaging piece is a portion that is integrated and continuously formed with the end portion in the tooth width direction of the tooth portion, as compared with the case where the engaging piece protrudes from between the tooth portions. Can be secured as long as the tooth depth. As a result, the tip portion where the tooth portion is not continuously formed can be shortened. Therefore, the mechanical strength of the engaging piece can be increased.

Further, the one gear member has a tubular portion extending in the axial direction from the end surface of the one gear member, and the hollow portion of the tubular portion is a shaft hole through which a support shaft is inserted. The engaging piece is preferably formed continuously from the outer peripheral surface of the tubular portion.

In one gear member, since the engaging piece is formed continuously from the outer peripheral surface of the tubular portion, the base end portion of the engaging piece is integrated with the outer peripheral surface of the tubular portion. Thereby, the base end portion of the engaging piece can be reinforced.

Further, the engaging piece fits into a key groove of another member mounted on the one gear, and a key portion that rotates the other member integrally with the one tooth portion in the circumferential direction. It is preferable that they also serve as.

Since the engaging piece also serves as a key portion that integrally rotates the other member with one tooth portion in the circumferential direction, the efficiency of the structure can be improved.

Further, the power transmission member has a rod-shaped link member, the drive gear has a joint portion to which the link member is connected, and the first locking portion is on the end face and the other It is preferable that two gears are provided symmetrically with respect to the plane line of sight with a straight line passing through the center of rotation of the gear and the center of rotation of the joint portion as the center.

Since the drive gear has two first locking portions formed symmetrically with respect to the plane line of sight, gear members having the same shape can be reused even when a geared motor in which the front and back sides of the geared motor are inverted is manufactured. ..

Further, a first output shaft and a second output shaft, and a differential gear mechanism using a planetary gear mechanism are further provided, and the first output shaft is a sun gear member which is a constituent member of the differential gear mechanism. It is connected directly to either the internal gear member and the planetary carrier member or via another gear member, and the second output shaft is directly connected to another component of the differential gear mechanism or another gear member. The differential gear mechanism may be configured such that the output portion of the constituent member is switched according to the rotational resistance of the first output shaft or the second output shaft.

As described above, according to the geared motor of the present invention, it is possible to suppress malfunction due to incorrect assembly of the gear member.

It is a perspective view which shows the appearance of a filter drive device. It is a bottom view which shows the drive mechanism of a geared motor. It is a side view sectional view of a differential gear mechanism. It is a top view and a side view of a drive gear. It is a top view, a side view and a bottom view of a driven gear. It is explanatory drawing of the locking structure at the time of normal assembly of a drive gear and a driven gear. It is explanatory drawing of the locking structure at the time of erroneous assembly of a driven gear. It is explanatory drawing of the locking structure at the time of erroneous assembly of a driven gear. It is explanatory drawing of the locking structure at the time of erroneous assembly of a driven gear. It is explanatory drawing of the locking structure at the time of erroneous assembly of a drive gear. It is explanatory drawing of the locking structure at the time of erroneous assembly of a drive gear. It is an exploded perspective view explaining the fitting structure of the engaging piece. It is a top view explaining the reversible structure of a drive gear and a driven gear.

[Outline of configuration]
(overall structure)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiment is an example of a filter drive device to which the geared motor of the present invention is applied (hereinafter, also referred to as “this example”). In the following description, "upper" and "lower" refer to directions parallel to the z-axis of the coordinate axis display drawn in FIG. 1, with the + z side being "upper" and the -z side being "lower". do. Similarly, the direction parallel to the x-axis of the same coordinate axis display is the front and back of the filter drive device, and the direction parallel to the y-axis is the left and right of the filter drive device.

FIG. 1 is a perspective view showing the appearance of the filter driving device 9. The filter driving device 9 of this example includes a geared motor 1, a first output shaft 16 which is a shaft body connected to the geared motor 1, a second output shaft 17, and a rotating shaft 18 which is another member. .. The geared motor 1 rotates the first output shaft 16 and the second output shaft 17 in opposite directions, and reciprocates the rotation shaft 18 within a predetermined angle range. The geared motor 1 has a case 10 composed of case halves 11 and 12 divided into upper and lower parts. The first output shaft 16, the second output shaft 17, and the rotation shaft 18 of this example are connected to the lower surface of the case 10 and extend downward.

The first output shaft 16 and the second output shaft 17 are connected to a filter (not shown) provided at an intake port or an air outlet of a ventilation device, an air conditioner, or the like. A cleaning member (not shown) for this filter is attached to the rotating shaft 18. The geared motor 1 of this example alternately drives the first output shaft 16 and the second output shaft 17 that rotate in opposite directions to reciprocate the filter in the directions of arrows A1 and A2 shown in FIG. Then, by bringing the cleaning member of the rotating shaft 18 into contact with the moving filter, foreign matter adhering to the filter is removed.

(Outline of drive mechanism)
FIG. 2 is a bottom view showing the drive mechanism of the geared motor 1. The drive mechanism of the geared motor 1 is mainly a motor 20 as a drive source, a plurality of power transmission members 30 for decelerating and transmitting the rotation of the motor 20, a differential gear mechanism 40 connected to the power transmission member 30, and the other. The drive gear 50, which is a gear member of the above, the first output shaft drive gear 36 and the second output shaft drive gear 37 driven by the differential gear mechanism 40, and the driven gear 60, which is one of the gear members driven by the drive gear 50. It is composed of. The first output shaft 16 is connected to the first output shaft drive gear 36. The second output shaft 17 is connected to the second output shaft drive gear 37. A rotating shaft 18 is connected to the driven gear 60. Here, the driven gear 60 has a gap formed between it and the internal gear member 42 in the radial direction of the differential gear mechanism 40. Further, in the driven gear 60, a gap is formed between the internal gear member 42 and the planet carrier member 44 in the axial direction of the differential gear mechanism 40.

The geared motor 1 has a connector portion 25 having a plurality of power supply terminals 251, and the connector portion 25 is exposed to the outside of the case 10. The electric power supplied from the outside via the connector portion 25 is input to the motor 20 by a flat cable (not shown) connecting the power supply terminal 251 and the motor 20.

The power transmission member 30 of this example is composed of a first reduction gear 31, a second reduction gear 32, a third reduction gear 33, a link drive gear 34, and a link member 35.

The first reduction gear 31, the second reduction gear 32, and the third transmission gear 33 are composite gears in which two spur gears having different pitch circles, a large diameter gear and a small diameter gear, are stacked in the axial direction. The pinion gear 21 of the motor 20 meshes with the large-diameter gear 311 of the first reduction gear 31, and the small-diameter gear 312 of the first reduction gear 31 meshes with the large-diameter gear 321 of the second reduction gear 32. Similarly, the small-diameter gear 322 of the second reduction gear 32 meshes with the large-diameter gear 331 of the third transmission gear 33. The large-diameter gear portion 331 of the third transmission gear 33 meshes with the sun gear member 41 of the differential gear mechanism 40, and the small-diameter gear portion 332 of the third transmission gear 33 meshes with the link drive gear 34. As a result, the rotation of the pinion gear 21 is decelerated and transmitted to the differential gear mechanism 40 and the link drive gear 34.

(Swing mechanism)
A boss 341 protruding upward is formed on the upper surface of the link drive gear 34. The link member 35 is a rod-shaped arm having shaft holes formed at both ends in the longitudinal direction thereof, and a boss 341 of a link drive gear 34 is inserted into one of the shaft holes 351. Similarly, a boss 58 projecting upward is formed on the upper surface of the drive gear 50, and the boss 58 of the drive gear 50 is inserted into the other shaft hole 352 of the link member 35. The link member 35 converts the rotational motion of the link drive gear 34 into a swing motion, whereby the drive gear 50 reciprocates within a predetermined angular range in its circumferential direction. Details of the structures of the drive gear 50 and the driven gear 60 will be described later.

(Differential gear mechanism)
FIG. 3 is a side sectional view of the differential gear mechanism 40 as viewed from the direction A in FIG. The differential gear mechanism 40 is a mechanism that rotates the first output shaft 16 and the second output shaft 17 in opposite directions and alternately by using a planetary gear mechanism. The differential gear mechanism 40 has a sun gear member 41, an internal gear member 42, a plurality of planetary gears 43, and a planetary carrier member 44 as constituent members thereof.

The sun gear member 41 is a gear member having a substantially cylindrical shaft portion 41a and a flange portion 41c extending radially outward from the lower end of the shaft portion 41a. A shaft hole 41b penetrating vertically is formed at the center of the shaft portion 41a in the radial direction. A fixed shaft 13 provided in the case 10 is inserted into the shaft hole 41b. The sun gear member 41 is installed under the internal gear member 42 arranged on the sun gear member 41, and the lower case half body 12 is formed under the sun gear member 41. A sun gear 411 that meshes with the planetary gear 43 is formed on the outer peripheral surface of the shaft portion 41a. An input gear 412 that meshes with the large-diameter gear 331 of the third reduction gear 33 is formed on the outer peripheral surface of the flange portion 41c. As a result, the sun gear member 41 rotates the sun gear 411 in conjunction with the rotation of the third reduction gear 33, and rotates the planetary gear 43 with which the sun gear 411 meshes.

The internal gear member 42 is a gear member having a substantially bottomed tubular shape. The base portion 42a of the internal gear member 42 is formed with a shaft hole 42b penetrating vertically at the center thereof in the radial direction. A fixed shaft 13 is inserted into the shaft hole 42b, similarly to the sun gear member 41. The internal gear member 42 is installed in the upper case half body 11, and the sun gear member 41 is formed under the internal gear member 42. An internal gear 421 that meshes with the planetary gear 43 is formed on the inner peripheral surface of the tubular portion 42c of the internal gear member 42, and the first output gear 422 is an output unit that meshes with the first output shaft drive gear 36. Is formed on its outer peripheral surface. That is, when the planetary gear 43 does not revolve and the internal gear 421 rotates, the first output shaft drive gear 36 and the first output shaft 16 rotate in conjunction with this.

The planetary gears 43 are supported by the planetary carrier member 44, which will be described later, so as to rotate and revolve. In this example, three planetary gears 43 are arranged at equal intervals in the circumferential direction of the planetary carrier member 44.

The planetary carrier member 44 is a gear member having a substantially covered cylinder shape. The lid portion 44a of the planetary carrier member 44 is formed with a shaft hole 44b penetrating vertically at the center thereof in the radial direction. The shaft portion 41a of the sun gear member 41 is inserted into the shaft hole 44b. The planetary carrier member 44 is arranged so as to be sandwiched between the sun gear member 41 and the internal gear member 42. The planetary carrier member 44 has a support shaft 44d that supports the planetary gear 43 so as to rotate, and rotates with the revolution of the planetary gear 43. A second output gear 441, which is an output unit that meshes with the second output shaft drive gear 37, is formed on the outer peripheral surface of the tubular portion 44c of the planetary carrier member 44. That is, when the arrangement angle of the internal gear 421 is fixed and the planetary gear 43 revolves, that is, when the planetary carrier member 44 rotates, the second output shaft drive gear 37 and the second output shaft 17 rotate in conjunction with this. Will be done.

A feature of the planetary gear mechanism is that the rotation direction of the internal gear and the revolution direction of the planetary gear (rotation direction of the planetary carrier) are opposite to each other. Due to this property, the first output shaft drive gear 36 and the first output shaft 16 meshed with the internal gear member 42 and the second output shaft drive gear 37 and the second output shaft 17 meshed with the planet carrier member 44 are mutually exclusive. Rotate in the opposite direction. Further, in this example, the reduction ratio for rotating the first output shaft drive gear 36 and the reduction ratio for rotating the second output shaft drive gear 37 are designed to be substantially the same. That is, almost the same torque is required to drive either of the drive gears 36 and 37.

By providing the differential gear mechanism 40, the geared motor 1 of this example rotates the first output shaft 16 and the second output shaft 17 having the smaller rotational resistance when the geared motor 1 is started. At this time, the constituent members that mesh with the drive gears 36 and 37 of the other output shafts 16 and 17 act as fixed portions whose rotation is restricted. Then, when the filter has reached a dead end, the magnitude of the rotational resistance of these output shafts 16 and 17 is reversed, so that the other output shafts 16 and 17 start rotating. By switching the output unit of the differential gear mechanism 40 in this way, the filter can reciprocate in the directions of arrows A1 and A2 shown in FIG.

[Locking structure]
(Drive gear)
Hereinafter, the drive gear 50 of this example will be described. FIG. 4 is a plan view and a side view of the drive gear 50. FIG. 4A is a plan view of the drive gear 50, and FIG. 4B is a side view of the drive gear 50.

As shown in FIGS. 4A and 4B, the drive gear 50 is a gear member having a substantially oval shape in a plan view. The drive gear 50 is formed with a shaft hole 50b, which is a through hole through which the support shaft 52 shown in FIG. 6 fixed to the case 10 is inserted. The drive gear 50 has a perfect circle portion 50d, which is a perfect circle range centered on the shaft hole 50b, and a diameter-expanded portion, which is a portion of the perfect circle portion 50d that is extended outward in the radial direction from a part in the circumferential direction. It has 50e and. The drive gear 50 is formed with a gear portion 51 that meshes with the driven gear 60. Further, a ridge portion 71, which is a first locking portion extending radially centrally from the outer edge 51c of the flat surface portion 51b, is formed on the flat surface portion 51b of the end surface 51d of the drive gear 50. Here, the ridge portion 71 is formed as a part of the drive gear 50, and the gear portion 51 and the ridge portion 71 are formed at different positions in the axial direction of the drive gear 50. Further, the ridge portion 71 is a wall body having an end face 71a and an end face 71b. As a result, the turning angle of the drive gear 50 when the engaging piece 73 of the driven gear 60, which will be described later, comes into contact with the ridge portion 71 can be made the same. Therefore, the ridge portion 71 can be brought into contact with the engaging piece 73 by a line or a surface. As a result, the range of contact between the ridge portion 71 and the engaging piece 73 can be widened.

The drive gear 50 is formed with seven tooth portions 51a in a range excluding the enlarged diameter portion 50e from the entire circumference thereof. Further, the diameter-expanded portion 50e is formed with a joint portion 50a to which the boss 58 and the link member 35 are connected, whereby the rotation range of the drive gear 50 by the link member 35 is adjusted. Further, the drive gear 50 is not a gear member that continuously rotates in the circumferential direction, but a gear member having an irregular shape designed to reciprocate in a predetermined angle range by a link member 35. Further, the tooth portion 51a of the drive gear 50 is formed in the range of the perfect circular portion 50d.

(Driven gear)
Hereinafter, the driven gear 60 of this example will be described. FIG. 5 is a plan view, a side view, and a bottom view of the driven gear 60. 5 (a) is a plan view of the driven gear 60, FIG. 5 (b) is a side view of the driven gear 60, and FIG. 5 (c) is a bottom view of the driven gear 60.

As shown in FIG. 5A, the driven gear 60 is a gear member having a substantially circular shape in a plan view. A shaft hole 60b, which is a through hole through which the support shaft 62 shown in FIG. 6 is inserted, is formed at the radial center of the driven gear 60. The driven gear 60 is formed with a gear portion 61 having eight tooth portions 61a that mesh with the drive gear 50. Further, the engaging piece 73 is formed so as to project outward from the gear portion 61 in the radial direction of the gear portion 61. The engaging piece 73 is a protrusion having end faces 73a and end faces 73b on both sides of the gear portion 61 in the circumferential direction.

Further, as shown in FIG. 5B, the gear portion 61 and the engaging piece 73 are formed at different positions in the axial direction of the driven gear 60. Here, the axial direction is a direction parallel to the z-axis of the coordinate axis display of FIG. 5 (b). The engaging piece 73 is integrally and continuously formed from the end surface 61c, which is the end of the tooth portion 61a of the driven gear 60 in the tooth width 61b direction, and is formed of the tooth portion 61a shown in FIG. 5 (c). It is formed so as to protrude in the same direction as the tooth depth 61d direction. Therefore, the engaging piece 73 is integrated with the end surface 61c of the tooth portion 61a in the tooth width 61b direction and is continuous as compared with the case where the engaging piece 73 protrudes from between the tooth portion 61a and the tooth portion 61a. The portion formed by the tooth can be secured as long as the tooth depth of 61d. As a result, the tip portion of the engaging piece 73 in which the tooth portion 61a is not continuously formed can be shortened. Therefore, the mechanical strength of the engaging piece 73 is increased.

Further, in the driven gear 60, a tubular portion 60a extending in the axial direction of the driven gear 60 is formed from the end surface 61c of the gear portion 61. A shaft hole 60b through which the support shaft 62 shown in FIG. 6 is inserted is formed in the tubular portion 60a, and the engaging piece 73 is continuously formed from the outer peripheral surface 60c of the tubular portion 60a. As a result, the mechanical strength of the engaging piece 73 is reinforced.

Further, the outer peripheral surface 60c of the tubular portion 60a of the driven gear 60 extends in a direction parallel to the y-axis of the coordinate axis display of FIG. 5B, and extends in the circumferential direction with the rotation axis 18 shown in FIG. A key shaft 63 that serves as a rotation stopper is formed for integrally rotating the rotating shaft 18 and the driven gear 60 by engaging with each other.

(At the time of regular assembly)
Hereinafter, the locking structure when the drive gear 50 and the driven gear 60 of this example are properly assembled will be described. FIG. 6 is a plan view illustrating a locking structure of the drive gear 50 and the driven gear 60 during normal assembly. FIG. 6A is a phase diagram in which the engaging piece 73 and the ridge portion 71 are arranged at one end in the swivel range, and FIG. 6B is a state diagram in which the engaging piece 73 and the ridge portion 71 are swiveled. FIG. 6 (c) is a state diagram arranged in the middle in the range in which the engaging piece 73 and the ridge portion 71 are swiveled at the other end in the turning range.

The drive gear 50 reciprocates in the circumferential direction in the angle range of FIGS. 6 (a) to 6 (c) by the power transmission member 30 shown in FIG. a1 is a turning center of the drive gear 50, and a2 is a connection center of the link member 35 shown in FIG. 2 and the joint portion 50a of the drive gear 50. Further, the driven gear 60 turns the turning range S in which the engaging piece 73 has an angle range of FIGS. 6 (a) to 6 (c) with the center of the support shaft 62 as the turning center. FIG. 6A is arranged at one end in the range in which the engaging piece 73 turns, and the engaging piece 73 has an end surface 72a of the second locking portion 72 and an end surface 73a of the engaging piece 73. Clearance is secured between them. Here, the second locking portion 72 is formed so as to extend from the lower surface of the upper case half 11 shown in FIG. Further, FIG. 6C is arranged at the other end portion in the range in which the engaging piece 73 turns, and the engaging piece 73 is the end surface 71a of the ridge portion 71 of the drive gear 50 and the engaging piece 73. A clearance is secured between the end face 73b and the end face 73b.

Further, as shown in FIG. 5B, in the driven gear 60, the gear portion 61 and the engaging piece 73 are formed at different positions in the axial direction of the driven gear 60. Therefore, the engaging piece 73 is not formed at a position where it comes into contact with the gear portion 51 of the drive gear 50. As a result, the turning range S of the engaging piece 73 can be secured widely.

Further, the ridge portion 71 is formed on the end surface 51d of the drive gear 50. Here, when the ridge portion 71 is formed on a member other than the end face 51d of the drive gear 50, it is necessary to form the ridge portion 71 on a member other than the drive gear 50. In this case, since the ridge portion 71 cannot be provided on the end surface 51d of the drive gear 50, the turning range of the engaging piece 73 of the driven gear 60 cannot be adjusted within the region of the drive gear 50. In the drive gear 50 of this example, since the ridge portion 71 is formed on the end surface 51d, the turning range of the engaging piece 73 of the driven gear 60 reaches the end surface 51d of the drive gear 50. Therefore, the degree of freedom in the turning range of the engaging piece 73 of the driven gear 60 is increased. The end surface 51d is a surface formed at a position different from that of the gear portion 51 in the axial direction of the drive gear 50, and is a surface on which the ridge portion 71 and the joint portion 50a are formed.

Further, the drive gear 50 and the driven gear 60 are provided with a ridge portion 71 and a second locking portion 72 for restricting the rotation of the engaging piece 73 at both ends of the turning range S of the engaging piece 73, and the driving gear 50 and the driven gear 60 are provided. By engaging the driven gear 60, when the drive gear 50 and the driven gear 60 are assembled in a position other than the regular arrangement, the drive gear 50 and the driven gear 60 reach both ends of the regular turning range S during operation. The engaging piece 73 comes into contact with the ridge portion 71 or the second locking portion 72 without having to contact the ridge portion 71 or the second locking portion 72. Therefore, it is possible to find an erroneous assembly of the drive gear 50 and the driven gear 60. As a result, it is possible to prevent malfunction due to incorrect assembly of the drive gear 50 and the driven gear 60.

(At the time of incorrect assembly)
Hereinafter, the locking structure when the drive gear 50 and the driven gear 60 of this example are assembled differently from the normal ones will be described with reference to FIGS. 6 to 11. 7 to 11 are plan views illustrating a locking structure when the drive gear 50 and the driven gear 60 are erroneously assembled. FIG. 7 is an explanatory diagram of a locking structure when the driven gear 60 is erroneously assembled, FIG. 7 (a) is a state diagram when the driven gear 60 is erroneously assembled, and FIG. 7 (b) is FIG. 7 (b). It is a state diagram at the time of operation of a). FIG. 8 is an explanatory diagram of a locking structure when the driven gear 60 is erroneously assembled, FIG. 8 (a) is a state diagram when the driven gear 60 is erroneously assembled, and FIG. 8 (b) is FIG. 8 (b). It is a state diagram at the time of operation of a). 9A and 9B are explanatory diagrams of a locking structure when the driven gear 60 is erroneously assembled, FIG. 9A is a state diagram when the driven gear 60 is erroneously assembled, and FIG. 9B is FIG. 9 (b). It is a state diagram at the time of operation of a). FIG. 10 is an explanatory diagram of a locking structure when the drive gear 50 is erroneously assembled. FIG. 11 is an explanatory diagram of a locking structure when the drive gear 50 is erroneously assembled, FIG. 11 (a) is a state diagram when the drive gear 50 is erroneously assembled, and FIG. 11 (b) is FIG. 11 ( It is a state diagram at the time of operation of a).

A locking structure when the driven gear 60 is assembled differently from the normal one will be described with reference to FIGS. 6 to 9. In FIG. 6, the drive gear 50 and the driven gear 60 operate in the normal turning range S shown in FIGS. 6A to 6C. In FIG. 6, the turning range S is 215 degrees. Further, in FIG. 7A, the alternate long and short dash line is the engagement piece 73 at the time of normal assembly shown in FIG. 6A. In the driven gear 60, the engaging piece 73 is assembled with the engaging piece 73 deviated from the regular assembly position by one mountain of the tooth portion 61a in the turning direction D1 of FIG. 7A. At this time, the engaging piece 73 is assembled at the same position as the position of the tooth portions 611 constituting the plurality of tooth portions 61a in FIG. 6A. The drive gear 50 and the driven gear 60 mesh with each other so that the drive gear 50 turns in the turning direction D2 and the driven gear 60 turns in the turning direction D1, so that the engaging piece of the driven gear 60 is as shown in FIG. 7B. A part of the end surface 73b of the 73 abuts on the radial outer tip portion of the end surface 71a of the ridge portion 71. As a result, the driving gear 50 and the driven gear 60 stop the turning operation. In this state, the engaging piece 73 of the driven gear 60 has not reached the turning position shown in FIG. 6 (c) in which the engaging piece 73 of the driven gear 60 is arranged at the end of the normal turning range S. Therefore, the drive gear 50 and the driven gear 60 do not operate in the normal turning range S, and it is found that the driven gear 60 is erroneously assembled.

In FIG. 8A, the alternate long and short dash line is the engagement piece 73 at the time of normal assembly shown in FIG. 6A. In the driven gear 60, the engaging piece 73 is assembled with the engaging piece 73 deviated from the regular assembly position by two ridges of the tooth portion 61a in the turning direction D1 of FIG. 8A. At this time, the engaging piece 73 is assembled at the same position as the position of the tooth portion 612 in FIG. 6A. The drive gear 50 and the driven gear 60 mesh with each other so that the drive gear 50 turns in the turning direction D2 and the driven gear 60 turns in the turning direction D1, so that the engaging piece of the driven gear 60 is as shown in FIG. A part of the end surface 73c of the 73 abuts on the radial outer tip portion of the end surface 71b of the ridge portion 71. As a result, the driving gear 50 and the driven gear 60 stop the turning operation. In this state, the engaging piece 73 of the driven gear 60 has not reached the turning position shown in FIG. 6 (c) in which the engaging piece 73 of the driven gear 60 is arranged at the end of the normal turning range S. Therefore, the drive gear 50 and the driven gear 60 do not operate in the normal turning range S, and it is found that the driven gear 60 is erroneously assembled.

Further, the engaging piece 73 of FIG. 8A is erroneously assembled at the positions of the tooth portions 613, the tooth portions 614, the tooth portions 615, and the tooth portions 616 constituting the plurality of tooth portions 61a of FIG. 6A. This case will be explained. When the drive gear 50 and the driven gear 60 mesh with each other and the drive gear 50 turns in the turning direction D2 and the driven gear 60 turns in the turning direction D1, the engaging piece 73 of the driven gear 60 is the ridge portion 71 of the drive gear 50. A part of the end face 73b of the engaging piece 73 of the driven gear 60 comes into contact with the end face 72b of the second locking portion 72. As a result, the driving gear 50 and the driven gear 60 stop the turning operation. Here, the state in which the engaging piece 73 is assembled at the positions of the tooth portion 613, the tooth portion 614, the tooth portion 615, and the tooth portion 616 in FIG. 6 (a) is compared with the engaging piece 73 in FIG. 8 (a). The engaging piece 73 of the driven gear 60 is assembled on the turning direction D1 side, which is the direction of turning from FIG. 6A to FIG. 6C. Therefore, the engaging piece 73 when the turning operation is stopped does not reach the turning position shown in FIG. 6C, which is arranged at the end of the normal turning range S. Therefore, the drive gear 50 and the driven gear 60 do not operate in the normal turning range S, and it is found that the driven gear 60 is erroneously assembled.

Further, when the engaging piece 73 of FIG. 8A is assembled at the position of the tooth portion 617 of FIG. 6A, the engaging piece 73 of the driven gear 60 is the upper surface of the second locking portion 72. It will run on 72c, and it will be revealed that the driven gear 60 is misassembled.

In FIG. 9A, the alternate long and short dash line is the engagement piece 73 at the time of normal assembly shown in FIG. 6C. In the driven gear 60, the engaging piece 73 is assembled so as to be offset by one mountain of the tooth portion 61a in the direction opposite to the turning direction D3 in FIG. 9A with respect to the normal assembly position. At this time, the engaging piece 73 is assembled at the same position as the position of the tooth portion 611 in FIG. 6 (c). As shown in FIG. 9B, the drive gear 50 and the driven gear 60 mesh with each other so that the drive gear 50 turns in the turning direction D4 and the driven gear 60 turns in the turning direction D3. The tip end portion of the end surface 73a of the 73 abuts on a part of the end surface 71b of the ridge portion 71 on the radial center side. As a result, the driving gear 50 and the driven gear 60 stop the turning operation. In this state, the engaging piece 73 of the driven gear 60 has not reached the turning position shown in FIG. 6A in which the engaging piece 73 of the driven gear 60 is arranged at the end of the normal turning range S. Therefore, the drive gear 50 and the driven gear 60 do not operate in the normal turning range S, and it is found that the driven gear 60 is erroneously assembled.

Further, when the engaging piece 73 of FIG. 9 (a) is assembled at the positions of the tooth portion 614, the tooth portion 615, the tooth portion 616, and the tooth portion 617 of FIG. 6 (c), the drive gear 50 and The driven gear 60 meshes with the drive gear 50 in the turning direction D4 and the driven gear 60 in the turning direction D3. At this time, the engaging piece 73 of the driven gear 60 turns ahead of the ridge portion 71 of the driving gear 50, and a part of the end surface 73a of the engaging piece 73 of the driven gear 60 is engaged in the second engagement. It comes into contact with the end surface 72a of the stop portion 72. As a result, the driving gear 50 and the driven gear 60 stop the turning operation. Here, the state in which the engaging piece 73 is assembled at the positions of the tooth portion 614, the tooth portion 615, the tooth portion 616, and the tooth portion 617 in FIG. 6 (c) is compared with the engaging piece 73 in FIG. 6 (c). The engaging piece 73 of the driven gear 60 is assembled on the turning direction D3 side, which is the direction of turning from FIG. 6 (c) to FIG. 6 (a). Therefore, the engaging piece 73 when the turning operation is stopped does not reach the turning position S in FIG. 6A, which is arranged at the end of the regular turning range S. Therefore, the drive gear 50 and the driven gear 60 do not operate in the normal turning range S, and it is found that the driven gear 60 is erroneously assembled.

Further, when the engaging piece 73 of FIG. 9A is assembled at the positions of the tooth portion 612 and the tooth portion 613 of FIG. 6C, the engaging piece 73 of the driven gear 60 is in second engagement. It will ride on the upper surface 72c of the stop portion 72, and it will be revealed that the driven gear 60 is erroneously assembled.

Further, with reference to FIGS. 6, 10 and 11, a locking structure when the drive gear 50 is assembled differently from the normal one will be described. In FIG. 10, the drive gear 50 is assembled with the ridge portion 71 displaced from the regular assembly position shown in FIG. 6A by one mountain of the tooth portion 51a in the turning direction D2 of FIG. 6A. Has been done. Further, in the drive gear 50 and the driven gear 60 of FIG. 10, the tooth portions 512 and 513 constituting the plurality of tooth portions 51a of the drive gear 50 and the tooth portions 615 of the driven gear 60 are meshed with each other. .. At this time, the ridge portion 71 is assembled at the same position as the position of the tooth portion 515 in FIG. 6A. In the drive gear 50 and the driven gear 60, the drive gear 50 turns in the turning direction D4 and the driven gear 60 turns in the turning direction D3, so that a part of the end face 73a of the engaging piece 73 of the driven gear 60 is secondly engaged. It comes into contact with the end surface 72a of the stop portion 72. As a result, the driving gear 50 and the driven gear 60 stop the turning operation. Here, the fact that the drive gear 50 turns in the turning direction D4 and the driven gear 60 turns in the turning direction D3 means that the driving gear 50 and the driven gear 60 are one end of the normal turning range S (a). ) To turn. Further, in the state where the turning operation is stopped, when the ridge portion 71 of the drive gear 50 does not reach the turning position shown in FIG. 6A which is arranged at the end of the regular turning range S, the engaging piece 73 Is in contact with the second locking portion 72. Therefore, the drive gear 50 and the driven gear 60 do not operate in the normal turning range S, and it is found that the drive gear 50 is erroneously assembled.

Further, when the ridge portion 71 of FIG. 10 is assembled at the positions of the tooth portion 514, the tooth portion 513, the tooth portion 512, and the tooth portion 511 constituting the plurality of tooth portions 51a of FIG. 6A, also When the drive gear 50 turns in the turning direction D4 and the driven gear 60 turns in the turning direction D3, a part of the end face 73a of the engaging piece 73 of the driven gear 60 comes into contact with the end face 72a of the second locking portion 72. As a result, the driving gear 50 and the driven gear 60 stop the turning operation. At this time, in any case, the state in which the turning operation is stopped is when the ridge portion 71 of the drive gear 50 does not reach the turning position shown in FIG. 6A in which the ridge portion 71 of the drive gear 50 is arranged at the end of the regular turning range S. In addition, the engaging piece 73 is in contact with the second locking portion 72. Therefore, the drive gear 50 and the driven gear 60 do not operate in the normal turning range S, and it is found that the drive gear 50 is erroneously assembled.

Further, in FIG. 11A, the drive gear 50 has the ridge portion 71 with respect to the normal assembly position shown in FIG. 6C, and the tooth portion 51a 2 in the turning direction D4 in FIG. 6C. It is assembled with a deviation of the mountain. Further, in the drive gear 50 and the driven gear 60 of FIG. 11A, the tooth portions 514 and the tooth portions 515 of the drive gear 50 and the tooth portions 618 of the driven gear 60 are meshed with each other. At this time, as shown in FIG. 11B, the drive gear 50 and the driven gear 60 are engaged pieces of the driven gear 60 by turning the drive gear 50 in the turning direction D2 and the driven gear 60 in the turning direction D1. A part of the end surface 73b of the 73 comes into contact with the end surface 72b of the second locking portion 72. As a result, the driving gear 50 and the driven gear 60 stop the turning operation. At this time, the ridge portion 71 of the drive gear 50 has not reached the turning position shown in FIG. 6 (c), which is arranged at the end of the regular turning range S. Therefore, the drive gear 50 and the driven gear 60 do not operate in the normal turning range S, and it is found that the drive gear 50 is erroneously assembled.

Further, in FIG. 11A, when the drive gear 50 is swiveled in the turning direction D4 and the driven gear 60 is swiveled in the turning direction D3, the tip of the end surface 73a of the engaging piece 73 of the driven gear 60 is a ridge portion. It abuts on a part of the end surface 71b of 71 on the radial center side. As a result, the driving gear 50 and the driven gear 60 stop the turning operation. In this state, the ridge portion 71 of the drive gear 50 has not reached the turning position shown in FIG. 6A in which the ridge portion 71 of the drive gear 50 is arranged at the end of the normal turning range S. Therefore, the drive gear 50 and the driven gear 60 do not operate in the normal turning range S, and it is found that the drive gear 50 is erroneously assembled.

Further, in FIG. 11 (a), the ridge portion 71 of the drive gear 50 is placed on the turning direction D4 of FIG. 6 (c) with respect to the regular assembly position shown in FIG. 6 (c). When the driven gear 60 is assembled with a deviation, the engaging piece 73 of the driven gear 60 rides on the upper surface 71c of the ridge portion 71 of the drive gear 50, and the incorrect assembly of the drive gear 50 is found.

Further, when the tooth portions 511 and 512 of the drive gear 50 in FIG. 11A and the tooth portions 618 of the driven gear 60 are engaged and assembled, the tooth portions 512 and the tooth portions of the drive gear 50 are assembled. When the 513 and the tooth portion 618 of the driven gear 60 are meshed and assembled, and when the tooth portion 513 and the tooth portion 514 of the drive gear 50 and the tooth portion 618 of the driven gear 60 are meshed and assembled. Even when the drive gear 50 and the driven gear 60 are turned, the drive gear 50 turns in the turning direction D2 and the driven gear 60 turns in the turning direction D1, so that the end face 73b of the engaging piece 73 of the driven gear 60 A part of the second locking portion 72 comes into contact with the end surface 72b. As a result, the driving gear 50 and the driven gear 60 stop the turning operation. At this time, the ridge portion 71 of the drive gear 50 has not reached the turning position shown in FIG. 6 (c), which is arranged at the end of the regular turning range S. Therefore, the drive gear 50 and the driven gear 60 do not operate in the normal turning range S, and it is found that the drive gear 50 is erroneously assembled.

(Matching structure of engaging pieces)
Hereinafter, the fitting structure of the engaging piece 73 of this example will be described. FIG. 12 is an exploded perspective view illustrating the fitting structure of the engaging piece 73.

As shown in FIG. 12, in the driven gear 60, the engaging piece 73 fits into the keyway 80b of the rotating shaft 18. More specifically, the rotating shaft 18 is composed of a shaft body 80a and a bracket 80d, and the end surface 73a and the end surface 73b of the engaging piece 73 are fitted into the key groove 80b formed in the shaft body 80a. It fits. Further, the key portion 63 formed so as to extend below the driven gear 60 fits into the key groove 80b. At this time, the tubular portion 60a is inserted into the shaft hole 80c of the shaft body 80a. Further, the end face 61c of the driven gear 60 comes into contact with the end face 81c of the shaft body 80a. Further, a key portion 74 composed of an engaging piece 73 and a key groove 80b is formed, and the engaging piece 73 causes the rotating shaft 18 and the tooth portion 61a of the driven gear 60 to be driven by the rotating shaft 18 and the driven gear 60. It also serves as a key portion 74 that integrally rotates the gear 60 in the circumferential direction. As a result, the geared motor 1 of this example is designed to improve the efficiency of its structure.

(Reversible structure)
Hereinafter, the reversible structure of the drive gear 50 and the driven gear 60 of this example will be described. FIG. 13 is a plan view illustrating a reversible structure of the drive gear 50 and the driven gear 60. 13 (a) to 13 (c) are swivel phase diagrams when the drive gear 50 and the driven gear 60 are assembled on the front side of the geared motor 1, and FIGS. 13 (d) to 13 (f) are geared motors. It is a turning state diagram when the drive gear 50 and the driven gear 60 are assembled on the back side of 1.

As shown in FIG. 13A, the drive gear 50 of this example is formed in a shape that is line-symmetrical with respect to the center line r1. Similarly, the driven gear 60 is also formed in a shape that is line-symmetrical with respect to the center line r2. That is, when the geared motor 1 is manufactured by turning over only the front and back (up and down (z direction)) while keeping the positional relationship of the front and rear (x direction) and left and right (y direction) of each part constituting the geared motor 1. The drive gear 50 and the driven gear 60 can be reused.

More specifically, the drive gear 50 has two ridges 71 on the end surface 51d symmetrically with respect to the center line r1 passing through the rotation center a1 of the drive gear 50 and the rotation center a2 of the joint portion 50a. And the ridge 75 is formed.

The turning states of the driving gear 50 and the driven gear 60 in FIGS. 13A to 13C are the same as the turning states of the driving gear 50 and the driven gear 60 shown in FIG. FIG. 13A is arranged at one end in the range in which the engaging piece 73 turns, and the engaging piece 73 has an end surface 72a of the second locking portion 72 and an end surface 73a of the engaging piece 73. Clearance is secured between them. Further, FIG. 13C is arranged at the other end portion in the range in which the engaging piece 73 turns, and the engaging piece 73 is the end surface 71a of the ridge portion 71 of the drive gear 50 and the engaging piece 73. A clearance is secured between the end face 73b and the end face 73b.

Further, FIG. 13D is arranged at the other end portion in the range in which the engaging piece 73 turns, and the engaging piece 73 is the end surface 75a of the ridge portion 75 of the drive gear 50 and the engaging piece 73. A clearance is secured between the end face 73a and the end face 73a. Further, FIG. 13 (f) shows that the engaging piece 73 is arranged at one end in the range in which the engaging piece 73 turns, and the engaging piece 73 is the end surface 72a of the second locking portion 72 and the end surface of the engaging piece 73. A clearance is secured with 73b.

The drive gear 50 has the same shape even when a geared motor in which the front and back sides of the geared motor 1 are inverted is manufactured because the two ridges 71 and the ridges 75 are formed symmetrically with respect to the plane line of sight. 50 can be reused.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention. For example, in the above embodiment, the drive gear 50 is the other gear member and the driven gear 60 is the one gear member. However, the drive gear 50 is one gear member and the driven gear 60 is A configuration in which the other gear member is considered is conceivable.

9 Filter drive device 1 Geared motor 16 1st output shaft 17 2nd output shaft 18 Rotating shaft (other members)
20 motor (drive source)
30 Power transmission member 35 Link member 40 Differential gear mechanism 41 Sun gear member 42 Internal gear member 422 First output gear (output unit)
44 Planetary carrier member 441 Second output gear (output section)
50 Drive gear (the other gear member)
50a Joint part 51 Gear part 51b Flat part 51c of drive gear 50 Outer edge 51d of flat part 51b End face 60 of drive gear 50 Driven gear (one gear member)
60a Cylindrical part 60b Shaft hole 60c Outer peripheral surface of tubular part 60a 61 Gear part 61a Tooth part 61b Tooth width 61c End face (end part)
61d Tooth rest 62 Support shaft 71, 75 Protruding part (first locking part)
72 Second locking portion 73 Engagement piece 74 Key portion 80b Key groove a1 of rotation shaft 18 Rotation center of drive gear 50 a2 Rotation center of joint portion 50a

Claims (9)

With the drive source
The drive gear, which is a gear member,
A driven gear, which is a gear member meshed with the drive gear,
A power transmission member that transmits the driving force of the driving source to the driving gear is provided.
The drive gear reciprocates in a predetermined angle range in its circumferential direction by the power transmission member.
One of the drive gear and the driven gear has a gear portion that meshes with the other gear member and an engaging piece that is a protrusion that protrudes radially outward from the gear portion. ,
The gear portion and the engaging piece are arranged at different positions in the axial direction of the one gear member.
At both ends of the turning range of the engaging piece, a first locking portion and a second locking portion for restricting the turning of the engaging piece are provided.
The first locking portion constitutes a part of the other gear member.
A geared motor characterized in that the gear portion and the first locking portion are arranged at different positions in the axial direction of the other gear member. The driven gear has the engaging piece and
The geared motor according to claim 1, wherein the drive gear has the first locking portion. The geared motor according to claim 1 or 2, wherein the first locking portion is formed on a flat surface portion provided on an end surface of the other gear member. The first locking portion according to any one of claims 1 to 3, wherein the first locking portion is a ridge portion extending radially toward the center from the outer edge of the flat surface portion of the other gear member. Geared motor. The engaging piece is formed continuously from the end portion of one of the tooth portions of the one gear in the tooth width direction, and is characterized in that the engaging piece protrudes in the same direction as the tooth contact direction of the tooth portion. The geared motor according to any one of claims 1 to 4. The one gear member has a tubular portion extending in the axial direction from the end face of the one gear member.
The hollow portion of the tubular portion is a shaft hole through which a support shaft is inserted.
The geared motor according to any one of claims 1 to 5, wherein the engaging piece is formed continuously from the outer peripheral surface of the tubular portion. The engaging piece also serves as a key portion that fits into a key groove of another member mounted on the one gear and integrally rotates the other member with the one tooth portion in the circumferential direction. The geared motor according to any one of claims 1 to 6, wherein the geared motor is provided. The power transmission member has a rod-shaped link member, and has a rod-shaped link member.
The drive gear has a joint portion to which the link member is connected.
Claim 1 is characterized in that the first locking portion is provided on the end surface symmetrically with respect to a straight line passing through the rotation center of the other gear and the rotation center of the joint portion. The geared motor according to any one of claims 7. The first output shaft and the second output shaft,
Further equipped with a differential gear mechanism using a planetary gear mechanism,
The first output shaft is directly connected to any of the sun gear member, the internal gear member, and the planetary carrier member, which are constituent members of the differential gear mechanism, or is connected to the second output shaft via another gear member. The output shaft is connected to another component of the differential gear mechanism directly or via another gear member.
One of claims 1 to 8, wherein the differential gear mechanism switches the output portion of the component member according to the rotational resistance of the first output shaft or the second output shaft. The geared motor described in.

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