JPH04189988A - Motor-driven actuator - Google Patents

Abstract

PURPOSE:To allow a small-sized motor to be used and suppress the operation noise by constituting a motor-driven actuator from a turning plate having a projection part, slide plate having an engagement hole part engaged with the projection part of the turning plate, and an electric control part. CONSTITUTION:A turning plate 3 having a projection part 17 which turns from one edge stop point to the other edge stop point through a center point and a slide plate 18 having an engagement hole part 20 of the projection part 17 are installed. The projection part 17 is turned in one edge direction or the other edge direction by turning the turning plate 3, and the slide plate 18 is shifted in rectilinear form to one edge stop point direction or the other edge stop point direction through the engagement hole part 20, and the projection part 17 is turned to a center point after stop. In this case, since the engagement hole part 20 includes the turning range from the center point of the projection part 17 to one edge stop point and the turning range from the center point to the other edge stop point, the turning plate 3 can be shifted manually, leaving the slide plate 18 at that position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electric actuator that can be used, for example, in a vehicle door lock, and whose output shaft can be freely moved manually or electrically.

[Conventional technology]

Conventionally, as a manually operable mechanism for this type of electric actuator, a neutral return type (refer to Japanese Patent Application Laid-Open No. 64-90376
), there was also an empty swing type (Special Publication No. 62-27226 and Special Publication No. 62-21110).

[Invention or problem to be solved]

However, in the neutral return type, noise is generated because the spring returns the actuator to the neutral point, and it is difficult to suppress that noise.Furthermore, the noise is generated after the actuator has finished operating, so it becomes a particularly worrisome noise. □There was. In addition, when returning to the neutral point, if friction occurs due to poor lubrication between the spring and the groove, the reliability of the actuator returning to the neutral point becomes low, requiring a very large amount of force to operate. It has the disadvantage that it may not be necessary or may become impossible to operate manually. Furthermore, if the return to neutral is performed using a spring, etc., when the actuator is operated, the spring is involved, resulting in a loss of operating force, which requires a larger motor or a multi-stage reduction gear, resulting in a larger structure. There was a drawback.

In addition, with the dry swing type, there is a problem that the running force is large due to factors such as voltage, load, and friction, and there is a low certainty that it will operate accurately.Furthermore, after running aground, it returns forcefully, causing a large impact and generating large noise. Ta. In addition, the return angle is uncertain, taking into consideration the presence or absence of an electric brake circuit in the motor, temperature, and variations in motor idling torque. It had

Therefore, the present invention solves the above-mentioned problems, allows the use of a small motor, does not produce any noise due to friction during operation, has reliable operation, and can be operated manually or electrically by the output shaft. The purpose is to obtain an electric actuator that can move freely.

[Means to solve the problem]

To this end, the present invention provides a rotating plate that freely rotates in a rotating range from a stopping point at one end through a center point to a stopping point at the other end by driving force, and a protrusion provided on the rotating plate. , an engagement hole that engages with the protrusion and accommodates a rotation range of the protrusion from the center point to the one end stop point and a rotation range from the center point to the other end stop point; , and a slide plate which has the retaining hole portion and moves linearly according to the mutual rotation of the one end stopping point and the other end stopping point of the projection, and the sliding plate has the retaining hole and moves the slide plate in a straight line according to the mutual rotation between the one end stopping point and the other end stopping point of the projection, and The operation of rotating the protrusion from the one-end stopping point to the one-end stopping point and then simultaneously moving the protrusion back from the one-end stopping point to the center point, or rotating the protruding part from the center point to the one-end stopping point and then returning the protrusion The motor is stopped at the one-end stop point, and the motor is electrically controlled.

[Effect]

As the rotation plate rotates, the protrusion freely rotates within a rotation range from a stopping point at one end to a stopping point at the other end through the center point. When the protrusion rotates to the one-end stop point, a slide plate having an engagement hole that engages with the protrusion moves linearly toward the one-end stop point. Then, after stopping at the protrusion or one end stopping point,
Return to the protrusion or center point. At that time, the engagement hole includes the rotation range from the center point of the protrusion to the one end stop point, so even if it returns to the protrusion or the center point, the slide plate will remain in its original position (in the direction of the one end stop point). . At this time, since the protrusion is located at the center point, the slide plate can move linearly in the linear movement direction (the other end stopping direction).

Further, contrary to the above, when the protrusion rotates to the other end stop position, the slide plate also moves linearly in the other end stop direction. The protrusion then returns to the central point. Since the engagement hole portion includes a rotation range from the center point of the protrusion to the other end stopping point, the slide plate remains in the other end stopping direction.

At this time, the slide plate can move linearly in the direction where it stops at one end.

In other words, the protrusion rotates from one end to the other end by a driving force, and automatically moves the slide plate in a straight line. The protrusion then returns to the central point. At this time, the protrusion has a rotation range that includes the rotation range from the center point of the slide plate to the stop point at one end, and the range from the center point to the stop point at the other end, so it can be freely moved in a straight line, and it can also be done manually. . Moreover, if the protrusion is stopped at that position without returning to the stopping point at one end or the stopping point at the other end, the rake 1 to the plate cannot be moved manually.

The above operation does not use a spring and the rotation of the drive source is directly transmitted to the linear movement of the slide plate, so a small motor can be used. Since the motor is electrically controlled by the electric control section, it is unlikely that the output shaft will be inoperable during operation.

〔Effect of the invention〕

According to the present invention, it is possible to obtain an electric actuator that is small in size, has low operating noise, and can be switched between electric and manual operation.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 13.

First, in FIG. 1, there is shown an exploded perspective view of an electric actuator used in a door lock actuator, etc., which is an embodiment of the present invention.

1 is a DC motor serving as a driving source. A worm 2 is attached to the output shaft of the DC motor 1.

3 is a worm wheel, which meshes with the worm 2. 4 is the lower part of the housing, and 5 is the housing lid.

6 is an electric control section. This electric control section 6 is fixed to the lower housing sink 4 with screws 61. There is a hole 7 in the substrate 62 that supports the electric control section 6, and the pillar section 8 at the bottom of the worm wheel 3 passes through the hole 7.
The hole 7 supports the column part 8. A column through hole 9 is present in the center of the column 8, and a shaft 10 passes through the column through hole 9. This shaft 10 is supported between a shaft lower support part 11 of the housing lower part 4 and a shaft upper support part 12 of the housing lid part 5. ] 3 and 14 are motor support parts that support the DC motor 1, and the housing sink lower part 4
It is integrated into the . A contact portion 15 is provided on the surface of the worm wheel 3 on the substrate 62 side, and is configured to come into contact with the substrate contact 16 of the substrate 62.

Reference numeral 17 denotes a protrusion, which is provided on the outer periphery of the worm wheel 3 on the opposite side to the side where the substrate 62 is present. 2(a), (b), (C).
), the electrical control unit 6 rotates the rotating range from the stopping point 100 at one end, passing through the center point 102, and ending at the stopping point 01 at the other end via the DC motor 1 and the worm wheel 3. Returning to FIG. 1, reference numeral 18 is a slide plate, which serves as the output shaft of the electric actuator. The slide plate 18 has a shaft engagement hole j9 that engages with the shaft lO in order to move the slide plate 18 in a straight line, and a protrusion 1.
An engagement hole 20 that engages with 7 is also provided. This engagement hole 20 is connected to the rotation range from the center point 102 to the one end stop point 100 within the rotation range from the one end stop point 100 to the other end stop point 101 of the protrusion I7, and from the center point 02 to the other end stop point 100. This hole has a size that accommodates the rotation range up to the other end stopping point 101.

The slide plate 18 is bent in the middle, and a shock-preventing rubber 22 is provided at the bent part 21.

The shock-preventing rubber 22 functions to absorb the shock caused by the slide plate 18 coming into contact with the inner side wall of the housing lower part 4, and to limit the linear movement of the slide plate 18. and,
An output shaft end of the slide plate 18 passes through an output shaft hole 23 provided in the side wall of the lower housing 4 and is connected to an output section (not shown).

The shaft end of the slide plate 18 is covered with elastic rubber 24 11 , and the elastic rubber 24 is attached to an output section 25 provided around the output hole 23 . Lower housing 4
and the housing lid portion 5 are attached using screws 26.

In addition, Fig. 3 shows the housing lower part 4 from direction A1 in Fig. 1.
A partially see-through side view, Fig. 4 is A2 of Fig. 1.
5 is a partially transparent side view of the housing lower part 4 seen from the A3 direction in FIG. 1, and FIG. 6 is a partially transparent side view of the housing lower part 4 seen from the A3 direction in FIG. FIG. 4 is a partially transparent front view of the housing lower part 4 seen from the direction.

Next, the operation of the electric actuator of the above-mentioned example is performed in a sixth manner.
This will be explained with reference to FIGS. 11 to 11.゛Figures 6 to 1
FIG. 1 is a partially transparent front view of the housing cover 5 shown in FIG. 1 as seen from the direction of arrow A4. Figure 6 shows the protrusion 17.
This is the position at the center point 102 of the rotation range, in other words, the position is approximately perpendicular to the direction of linear movement of the protrusion 17 or the slide plate 18. From this state, when the worm wheel 3, which is a rotating plate, is rotated in the direction of arrow B by the DC motor 1, which is a driving source,
The protrusion 17 moves to the position shown in the figure, and the slide plate 18 moves linearly in the direction of arrow C accordingly.

The rotating plate further rotates, and the protrusion 17 and slide plate 18 move from the state shown in FIG. 7 to the position shown in FIG. 8. At this time, the shock-preventing rubber 22 provided on the slide plate 18 comes into contact with the inner side wall of the lower housing 4,
The range of linear movement of the slide plate 18 is limited. and,
The protrusion 17 is always engaged with the engagement hole 20. As a result of the above, the protrusion 17 is forcibly stopped, the DC motor 1 is suddenly stopped together with the worm wheel 3, and a reverse current is generated from the DC motor 1. This reverse current is captured by the electric control section 6, and the electric control section 6 sends the reverse current to the DC motor l. Then, the worm wheel 3 slowly rotates in the direction of the arrow from the state shown in FIG. 8 to the state shown in FIG. 9. And slide plate 1
8, while maintaining the fixed position, insert the protrusion 17 or the engagement hole 20.
The worm wheel 3 rotates around the center point 102. Then, the state shown in FIG. 10 is reached. In this state, the DC motor 1 is stopped by contacting the contact portion 15 provided on the substrate 62 side of the worm wheel 3 or the substrate contact 16 of the substrate 62, and the worm wheel 3
stops at the center point +02. When the slide plate 18 is moved in the direction of arrow E in the state shown in FIG.
exists within the range of the engagement hole 20, so the engagement hole 20
can move the slide plate 18 without coming into contact with the protrusion 17. Then, the state shown in FIG. 6 is reached.

Furthermore, when the worm wheel 3 rotates in the F direction in the state shown in FIG. 10, unlike the above, the slide plate 1
8 moves in the direction of arrow E and enters the state shown in FIG. 1j. After this state, the worm wheel 3 rotates in the direction of arrow G in FIG. 11 and returns to the state shown in FIG. 6. In this state,
The slide plate 18 can be manually moved in the direction of arrow C in FIG. 6, and when manually operated, it will be in the state shown in FIG. 10.

Next, a block diagram of the electric control section 6 is shown in FIG. 12, and the operation of the electric control section 6 is shown in FIG. 13, which is a time chart.

First, when the door lock switch 30 is connected to the LOCT side, the timer 31, timer 32, and timer 35
Current flows through timer 33 and timer 34, but no current flows through timer 33 and timer 34. At the same time, timer 31, timer 3
A current immediately flows out from the timer 32, and after a while, the current flows out from the timer 32. When current flows from the timer 35, the main switch 36 is immediately turned on.
Current flows throughout this circuit. Also, when current flows from the timer 31, the transistor 41 and the transistor 4
2, and a current flows in the direction of arrow R to the DC motor l.

Then, the worm wheel 3 moves as shown in FIGS. 6 to 8.

As shown in FIG. 8, the slide plate 18 comes into contact with the inner side wall of the lower housing 4 and is stopped.

At this time, since the protrusion 17 is in contact with the retaining hole 20, the worm wheel 3 is forced to stand still.
The DC motor 1 is stopped. At the same time, a reverse current flows from the DC motor 1. This reverse current is received by a current detection shunt resistor 50 and the current flows out from a comparator 51. This current instructs each timer to stop the current flowing from timer 31 and to draw current from timer 32. When the current of timer 31 is stopped, the current of transistors 41 and 42 is also stopped. Then, when a current flows from the timer 32, a current flows through the transistors 43 and 44, and a current flows into the DC motor 1 in the direction indicated by the arrow. Then, the ohm wheel 3 moves as shown in FIGS. 8 to 10. At this time, the current from the timer 32 passes through the current limiting resistor 52, so the DC motor 1 slowly rotates in reverse.

When the worm wheel 3 reaches the center point 102 as shown in FIG. 10, the contact portion 15 provided on the worm wheel 3 and the substrate contact 16 of the substrate 62 come into contact. This allows the neutral point switch 53 of the electric control section 6 to
The timer 32 enters the N state and instructs the timer 32 to stop the current flowing. As a result, transistor 43
．． 44, and the DC motor 1 stops.

Next, when the door lock switch 30 is connected to the UNLOCK side, the timer 33, timer 34, and timer 35
Current flows through timer 31 and timer 32, but no current flows through timer 31 and timer 32. At the same time, timer 33, timer 3
5 immediately starts flowing, and the timer 34 starts flowing after a while. When current flows from the timer 35, the main switch 36 is immediately turned on.
Current flows throughout this circuit. Also, when current flows out from the timer 33, the transistor 43 and the transistor 4
Current flows through DC motor 1 in the direction of the arrow. Then, the worm wheel 3 moves as shown in FIG. 10 to FIG. 11.

As shown in the state shown in FIG. 11, the slide plate 18 is brought into contact with the inner side wall of the lower housing portion 4 and stopped, and the projection 17 is brought into contact with the engagement hole 20 thereof. Therefore, the DC motor 1 is stopped, and a reverse current flows from the DC motor 1. This reverse current is received by the current detection soyant resistor 50 and the current flows out from the comparator 51. The current instructs each timer to stop current flowing from timer 33 and to draw current from timer 34. When the current in the timer 33 is stopped, the current in the transistors 43 and 44 is stopped, and when the current flows from the timer 34, the current flows in the transistors 41 and 42.
A current flows to the DC motor 1 in the direction of arrow R in FIG. Then, the ohm wheel 3 moves from Fig. 11 to Fig. 6.
Move as shown. At this time, since the current from the timer 34 passes through the current limiting resistor 52, the DC motor slowly rotates in reverse. Then, when the worm wheel 3 reaches the center point 102 as shown in FIG.
The contact portion 15 provided on the substrate 62 comes into contact with the substrate contact 16 of the substrate 62. As a result, the neutral point switch 53 of the electric control unit 6 is turned on, and the timer 34 instructs the neutral point switch 53 to stop the current flowing from the timer 34. As a result, no current flows through the transistors 41 and 42, and the DC motor I stops.

Next, when the deadlock switch 54 is turned on and the door lock switch 30 is placed in the LOCK position, the timer 31 operates normally and the transistor 41.
2, the DC motor 1 rotates, and the worm wheel 3
rotates in the R direction. Thereafter, when the comparator 5] receives a reverse current from the DC motor 1, the current from the timer 31 is stopped, no current flows through the transistors 4 and 42, and the DC motor 1 stops rotating. At this time, the timers 32 and 34 are switched between the deadlock switch 54 and the O
Due to N, current does not flow due to reset or operation. Therefore, no current flows through the transistors 41, 42, 43, and 44. As a result, the worm wheel 3 does not return to the position shown in FIG. 6, but stops at the position shown in FIG. 8.

Also, with the deadlock switch 54 in the ON state, UNL
Even in the OCK state, the timers 32 and 34 do not work, and the worm wheel 3 stops at the position shown in FIG.

As a result of the above operation, in the electric actuator of this embodiment of the present invention, when the deadlock switch is turned OFF, the door lock switch can be locked or UNLOCKed.
By switching to , the electric actuator moves automatically, and can then be moved manually. Next, when the put-lock switch is turned ON, the electric actuator is automatically moved by switching the door lock switch to LOCK or UNLOCK, and cannot be moved manually thereafter.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an electric actuator according to an embodiment of the present invention, Fig. 2 is a top view illustrating the rotation range of the rotary plate used in the above embodiment, and Fig. 3 is an arrow shown in Fig. 1. FIG. 4 is a partially transparent side view of the housing cover seen from direction A1, FIG. 4 is a partially transparent side view of the housing cover seen from direction A2 of FIG. 1, and FIG. 5 is FIG. A partially transparent side view of the housing lid seen from the direction of arrow A3;
6 is a partially see-through side view of the housing cover seen from the direction of arrow A4 in FIG. 1; FIGS. 7 to 11 are partially see-through front views showing changes in the operation of FIG. 6; FIG. 12 is a block diagram of the electric control section of the electric actuator of the present invention, and FIG. 13 is a time chart showing the operation of the electric control section. 3... Rotating plate (ohm wheel), 6... Electric control section, 17... Projection, 20... Engagement hole, 18.
...Slide plate, 100...One end stopping point, 101...
・Other end stopping point. 102...Center point.

Claims (1)

[Scope of Claims] A rotating plate that freely rotates in a rotating range from a stopping point at one end to a stopping point at the other end through a center point by a motor, a protrusion provided on the plate of the rotating plate; an engagement hole that engages with the protrusion and accommodates a rotation range from the center point to the one end stop point of the protrusion and a rotation range from the center point to the other end stop point; a slide plate having a hole and moving linearly according to the mutual rotation of the one end stopping point and the other end stopping point of the protrusion, and rotating the protrusion from the center point to the one end stopping point. Later, the operation of rotating the protrusion from the one-end stopping point to the center point and returning it, or the operation of rotating the protrusion from the center point to the one-end stopping point and then stopping the protrusion at the one-end stopping point. An electric actuator comprising: an electric control section that controls the motor.