JPS63272873A - Actuator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an actuator that uses an electric motor as a drive source to reciprocate an operated lever of a door lock.

"Prior art" Conventional actuators include 1, for example,
There is one disclosed in Publication No. 0317.

That is, the publication discloses that an electric motor is used as a drive source, a spur gear reduction mechanism is connected to the rotational drive shaft of the electric motor for deceleration, and a swinging sector gear is provided at the final stage of the spur gear reduction mechanism.
A device is disclosed in which a spring is provided which converts the swinging motion of the sector gear into the movement of a reciprocating rod and biases the rod to a neutral position δ.

In order to enable the actuator not only to operate the object to be operated but also to perform F-movement operation, the rod and the operated lever of the operation object are connected with a play equal to the operating stroke of the operated lever. .

"Problem to be solved by invention" However, such conventional actuators,
Since deceleration is performed by a spur gear reduction mechanism, the mechanism is large and complicated, and play is provided at the connection part with the moving object, making the connection structure complicated and the assembly difficult. There was a point.

The present invention has been made in view of these conventional problems, and aims to provide an actuator that reduces speed using a pair of screws, incorporates play, and is easy to assemble.

"Means for Solving Problems" The gist of the present invention for achieving the above object is to provide an actuator that uses an electric motor as a drive source to reciprocate an operated lever of a door lock, An electric motor and a screw shaft are disposed in parallel with the drive shaft of the electric motor and are driven to rotate in forward and reverse directions.

A movable member is screwed onto the screw shaft so as not to be movable in the axial direction of the screw shaft, and an output member connected to the operated lever is coupled to the movable member.

A gear transmission mechanism that connects the drive shaft of the electric motor and the screw shaft, and a return mechanism that urges the gear transmission mechanism to a neutral position, and linkage between the output member and the drive shaft of the electric motor. The actuator is characterized in that a play mechanism having a play amount corresponding to the operating stroke of the output member is provided in the middle of the path.

"Operation" When the electric motor is started, the rotational force of its drive shaft is transmitted to the screw shaft via the 1 & 1 wheel transmission mechanism. When the screw shaft rotates, the non-rotating movable member moves, and the output member connected to the movable member is displaced to move the operated lever of the door lock.

After the operation is complete, 'i! When the motor stops, the gear transmission mechanism returns to the neutral position by the neutral return mechanism.

At this time, the output member remains stationary at the end of its working stroke.

When the operated lever is moved by L movement etc. and the output member is displaced following the movement of the operated lever, a play mechanism corresponding to the operating stroke of the operated lever is provided in the linkage path between the output member and the motor. Since the operation from the operated lever is not transmitted to the motor, manual operation can be carried out easily.

"Example" Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 to 3 show an embodiment of the present invention.

The output member 17 of the actuator 1 is connected to the operated door lock 8 (not shown), and the transmission system from the door lock to the output member 17 is connected without any play.

The actuator l has an electric motor 30 disposed in one corner of the housing 20, a screw shaft 11 disposed parallel to the axial direction of the electric motor 30 and its drive shaft 31,
The end of the adjacent drive shaft 31 and the end of the screw shaft 11 are connected by a gear transmission mechanism 40, and the gear transmission mechanism 40
A neutral return mechanism 50 is provided for biasing the neutral position toward the neutral position.

The screw shaft 11 is rotatably installed between the outer ring 21 of the housing 20, and is connected to the screw portion 12 and the support shaft portion 1.
3. An engagement plate 14 is fixed to the screw part 12 side of the support shaft part 13 of the screw shaft 11,
A driven projection 14a is provided on the outer periphery of the engagement plate 14 in a protruding manner.

A moving member 13 is screwed onto the screw shaft 11.
The threads on the screw portion 12 of the screw shaft 11 have a relatively large lead angle.

The movable member 15 is set to move from one end to the other with a rotational stroke of about one and a half revolutions relative to the operating stroke of the output member.

An output member 17 facing the movable member 15 and swinging by a stroke corresponding to the set stroke of the operated lever is pivotally supported by a pivot boss 22 of the housing 20.

An engagement groove 18a is formed in the operated end 18 of the output member 17, and the engagement pin 16 of the moving member 15 is fitted into this engagement groove 18a. The outer end of the output member 17 forms an operating end 19 connected to the operated lever.

The gear transmission 4Ii40 is a drive shaft 31 of the electric motor 30.
a drive gear 41 fixed to the drive gear 41; a medium gear 43 that meshes with the drive gear 41 and is pivotally supported by a pivot shaft 42 installed in the housing 20 and has a large gear 43a and a small gear 43b; It consists of a final stage gear 44 that is rotatably loosely fitted to the support shaft.

Final stage gear 44 on the screw part 12 side of the screw shaft 11
A circumferential groove 44a is bored in the side surface of the circumferential groove 44a, and a push protrusion 45 is provided by closing one part of the circumferential groove 44a. A biased protrusion 46 is provided on the opposite side of the final stage gear 44 in a protruding manner.

There is a play mechanism l between the screw shaft 11 and the final gear 44.
O is provided. The play mechanism 10 is rotatably pivoted on a push protrusion 45 formed on the final stage gear 44 and a support shaft portion 13 between the final stage gear 44 and the screw portion 12 of the screw shaft 11. , the engagement plate 14 of the screw shaft 11
The first engaging protrusion 47a, which can be contacted from either side in the rotational direction, and the pushing protrusion 45 of the final gear 44 of the gear transmission mechanism 40 can be contacted from either side in the rotational direction. It comprises an interposed rotor 47 having a second engaging protrusion 47b that can come into contact with it, and an engaging plate 14 formed on the screw shaft 11.

The final stage gear 44 of the gear transmission mechanism 40 and the screw shaft 11 are connected to each other with a rotational play corresponding to the actuation stroke of the operated lever by the L structure.

In this embodiment, the amount of rotational play is set to approximately one and a half rotations.

The middle school return mechanism 50 is vi1tunden ij! The final gear 44 of the mechanism 40 is provided with a first biasing spring 51, an idling member 52, which is arranged from the final gear 44 to the end of the screw shaft 11, and in order from the final gear 44. It consists of a second biasing spring 53.

The first biasing spring 51 has a coil portion 51a that loosely fits into a pivot boss 44b provided on the final stage gear 44.
The biasing ends 51b, 51b at the ends of the gear 44 are opposed to each other with a gap between them, and the biased protrusion 46 of the final stage gear 44 is held between the biasing ends 51b, 51b.

The free rotation member 52 is rotatably fitted and pivotally supported on the support shaft portion 13 of the screw shaft 11, and has a first member held between the biasing ends 51b, 51b of the first biasing spring 51. Engagement protrusion 52
a and a second engagement protrusion 52b on the opposite side.

The biasing spring 53 is attached to the pivot boss 5 provided on the free rotation member 52.
The coil part 53a is loosely fitted into the coil part 53a, and the biasing ends 53b and 53b at the ends of the coil part 53a are opposed to each other with a gap between them, and the second engagement protrusion of the free rotating member 52 is inserted between the biasing ends 53b and 53b. A reference protrusion 23 protruding from the housing 20 is further sandwiched between the +ta ends 53b and 53b.

Next, the action will be explained.

The actuator 1 is arranged in the housing 20 alongside the main body of the electric motor 30 and the screw shaft 11, and the gear transmission mechanism 40, the play mechanism 1O9, and the neutral return mechanism 50 are arranged in the other space of the housing 20. There was no room left, so it was made thinner and smaller.

When the actuator l is not operating, the output member 17
is, for example, in the state shown in FIG.
I'm following the trend.

The neutral return mechanism 50 includes the reference protrusion 23. Second biasing spring 5
3, the first engagement protrusion 52a and the second engagement protrusion 52b of the free rotation member 52, the biasing end 51b of the bias spring 51 of fSl.

51b, are arranged in series, and the final stage l&! of the gear transmission mechanism 40 is arranged in series.
The biased protrusion 46 of the center 44 is held between the biasing ends 51b, 51b of the first biasing spring 51, and the final stage gear 44 is held at the neutral position t.

The operation of operating the output member 17 by the electric motor 30 is as follows.

For example, in FIG. 4, when the electric motor 30 is started to rotate the final gear 44 counterclockwise, the drive shaft 31 rotates the drive tooth 11f 41, and the large gear 43a of the middle gear 43, The small tooth 43b is transmitted to the final stage gear 44, and the pushing surface 45a of the pushing projection 45 of the final stage gear 44 engages with the second engagement projection 47b of the interposed rotor 47. Engagement protrusion 47a or driven protrusion 1 of engagement plate 14
4a is hooked and rotated, and the screw shaft 11 is rotated.

As the screw shaft 11 rotates, the movable member 15 that is screwed onto the screw shaft 11 and does not rotate moves to the left in FIG.
By hooking and displacing the output member 8, the output member 17 is rotated clockwise.

This rotation of the output member 17 causes the operated lever to be operated.

By the rotation of the final stage gear 44 that rotates the screw shaft 11, the biased protrusion 46 is also integrally displaced, and as shown in FIGS.
As shown in FIGS. (a) to (d), one of the biasing ends 51b and 51b of the first biasing spring 51 of the neutral return mechanism 50, the free rotating member 52, and the second biasing spring 53 Biasing end 53b, 5
One side of 3b is displaced.

The other of the biasing ends 53b, 53b of the second biasing spring 53 engages with the reference protrusion 23 and is not displaced, and the final stage gear 44 is not displaced by the first biasing spring 51. It rotates approximately one and a half rotations against the biasing force of the second biasing spring 53.

When the electric motor 30 is de-energized upon completion of the operation shown in each (d) of FIGS. 4, 5, and 6, the driving force is lost, so that the biased protrusion 46 of the final stage gear 44 is rotated by the biasing forces of the first biasing spring 51 and the second biasing spring 53 of the neutral return mechanism 50, and as shown in FIGS.
f) is the final step @! lj 44 returns to the neutral position.

When the final stage gear 44 returns to the neutral position, the driven protrusion 14a of the retaining plate 14 is left in the stopped position, and the pushing protrusion 45 of the final stage gear 44 rotates a little less than one rotation, and then
The other pushing surface 45b engages with the second engagement protrusion 47b of the interposed rotor 47, rotates the interposed rotor 47, and causes the first engagement protrusion 47a of the interposed rotor 47 to engage with the screw shaft 11. It is located on the opposite side of the driven projection 14a of the mating plate 14. Therefore, the distance between the pushing projection 45 of the final stage gear 44 and the driven projection 14a of the screw shaft 11 is approximately one rotation! A play of h is provided.

When the electric motor 30 is started to rotate in the opposite direction from the above state, the pushing projection 45 of the final stage gear 44 is moved from the opposite direction via the intervening rotor 47 to the driven projection 1 of the engagement plate 14.
4a and rotate the screw shaft 11 in the opposite direction,
The output member 17 is operated in the opposite direction.

By rotating the final gear 44 in the opposite direction, the protrusion 46
Or the biasing end 5 of the first biasing spring 51 of the neutral return mechanism 50
The other of 1b and 51b is hooked and displaced, and the freely rotating member 5
2 and biasing ends 53b, 53b of the second biasing spring 53
is displaced, and the final stage gear 44 is displaced by the first biasing spring 51 .
Against the biasing force of the second biasing spring 53, approximately 1
Turn half a turn.

When the electric motor 30 is de-energized, the biased protrusion 46 of the final float 44 or the first biasing spring 5 of the neutral return mechanism 50
1. The final stage gear 4 is rotated by the biasing force of the second biasing spring 53.
4 returns to the neutral position from the opposite direction.

After the operation by the electric motor 30 is completed and the final stage gear 44 returns to the neutral position, for example, when the operated door lock lever is operated manually and the output member 17 is rotated clockwise in FIG. , the operated end 18 of the output member 17
moves the engagement pin 16 of the moving member 15 to the left in the figure.

The movement of the moving member 15 causes the screw shaft 11 to rotate.The rotation is within the range in which the pushing protrusion 45 of the final stage gear 44 escapes from the driven protrusion 14a of the screw shaft 11 by approximately one and a half rotations. As shown in Figure 7 (a) to (d),
Screw shaft 11, engagement plate 14, and interposed rotor 47
P: There is no movement of the mechanism on the electric motor 30 side from the step gear 44, and there is no interference in operation.

In the embodiment described in iii, the return mechanism 50 is
The play mechanism io is composed of the first and second urging springs 51 and 53, the free rotation member 52, etc., and the play mechanism io is configured by the pushing projection 45. Interposed rotor 47. As shown in FIG. 8, the neutral return mechanism 50 is constructed by removing the floating member 52 and one of the biasing springs,
may be reduced to one, and the interposed rotor 47 may be omitted from the play mechanism IO.

In this embodiment, the engagement protrusion 14b provided on the engagement plate 14 can be directly engaged with the pushing protrusion 45 of the final float 44, and the amount of play of the play mechanism 10 is the same as that of the screw shaft 1.
1 and the final stage gear 44 by approximately a little less than one rotation.

Furthermore, although the play mechanism lO is provided between the final stage gear 44 and the screw shaft 11, it may also be provided between the moving member 15 and the output member 17. The gear 44 is integrally connected to the gear 44 without any play, or is formed integrally with the gear 44 . That is, one important thing is that this play mechanism IO is provided in the middle of the transmission path between the output member and the motor, so that the operation thereof is not transmitted to the motor during manual operation.

"Effects of the Invention" According to the actuator of the present invention, the drive shaft of the electric motor and the screw shaft are provided in parallel in the housing and connected by a gear transmission mechanism, so it is possible to reduce the thickness of the entire actuator. In addition, a neutral return mechanism is provided to return the gear transmission mechanism to the neutral position, and a play mechanism is provided in the transmission path between the output member and the electric motor to prevent interference between the internal mechanism and the operation. Therefore, there is no need for play in connection with the moving object, improving ease of assembly.

[Brief explanation of the drawing]

1UA to 5 show an embodiment of the present invention, in which FIG. 1 is a front view showing the inside of the actuator opened, FIG. 2 is a sectional view taken along the line n-aMA in FIG. An exploded perspective view of the internal mechanism, FIG. 4 is an explanatory diagram showing the relationship between the intervening rotor and the final stage float, and FIG. 5 is the relationship between the final stage tkJ◆1t, the first biasing spring, and the free rotation member. FIG. 6 is an explanatory diagram showing the relationship between the free rotating member and the second biasing spring, and FIG. 7 is an explanatory diagram showing the operation near the screw shaft when the output member is operated from the side to be operated. The explanatory drawing, FIG. 8, is an exploded perspective view of the internal mechanism of another embodiment. l... Actuator lO... Play mechanism 11
... Screw shaft 14 ... Retention plate 14
a... Driven projection 15... Moving member 17...
・Output member 20...Housing 30...
Electric motor 40...Gear transmission mechanism 44...
Final stage south 11j-45... Pushing protrusion 46... Forced protrusion 50... Neutral return mechanism 51-... First biasing spring 52... Idle member Fig. 1 Fig. 2 (ano II (d) 52b b OD Figure 6

Claims (3)

[Claims] (1) In an actuator that uses an electric motor as a drive source to reciprocate the operated lever of the door lock, the actuator is disposed in the housing parallel to the electric motor and the drive shaft of the electric motor, and rotates in forward and reverse directions. disposing a driven screw shaft, screwing a movable member onto the screw shaft so as to be movable in the axial direction of the screw shaft, and connecting an output member connected to the operated lever to the movable member; A gear transmission mechanism that connects the drive shaft of the electric motor and the screw shaft, and a neutral return mechanism that urges the gear transmission mechanism to a neutral position are provided, and a gear transmission mechanism that connects the drive shaft of the electric motor and the screw shaft is provided, and a neutral return mechanism that biases the gear transmission mechanism to a neutral position is provided in the middle of the linkage path between the output member and the drive shaft of the electric motor. An actuator further comprising a play mechanism having a play amount corresponding to the operating stroke of the output member. (2) The neutral return mechanism includes a first biasing spring that has a coil portion concentric with the pivot of the final gear and clamps a biased projection protruding from the final gear between biasing ends; an idling member having a first engagement protrusion inserted between the biasing ends of the first biasing spring; and a second engagement protrusion provided on the idling member inserted between the biasing ends of the coil part. 2. The actuator according to claim 1, further comprising a second biasing spring which is held between the springs and a second biasing spring having a reference protrusion fixed to the housing inserted between the biasing ends thereof. (3) A play mechanism is provided in the middle of the linkage path between the output member and the drive shaft of the drive motor, and the play mechanism is connected to the screw shaft and the gear mechanism, and to the engagement protrusion provided on the screw shaft on either side in the rotational direction. an interposed rotor having a first engagement protrusion that can be brought into contact with the interposed rotor; 3. The actuator according to claim 1 or 2, characterized in that the actuator comprises a pushing projection that can be brought into contact with the actuator from above.