JPH03212584A - motor 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 This invention relates to an actuator that uses a motor as a drive source and is used, for example, in an automobile door lock.

[Conventional technology]

Conventionally, as this type of motor actuator, for example, Japanese Patent Publication No. 58-47551 and Japanese Patent Application Laid-Open No. 60-1138
No. 56 and Japanese Unexamined Patent Publication No. 60-253680. This kind of actuator locks and unlocks the door by remote control, and at the same time has a clutch inside the actuator to ensure locking and unlocking by manual operation! 1! 111 has been established,
Generally, the door lock mechanism and the motor are separated from each other except when activated by remote control.

Figure 3 is a front view of the door lock actuator installed, Figure 4 is a plan view of the internal structure of the actuator,
FIG. 5 is a sectional view taken along line V-V in FIG. 4, and FIG. 6 is a detailed view of the link bar.

In each figure, a door lock actuator 1 is connected to a door lock mechanism 2 via a rod 3. In detail, the link par 5 fixed to the output shaft 4 of the actuator
One end of the rod 3 is connected to the free end of the lever 2 with a clamp 6, and the other end of the rod 3 has a lock knob 2b at the tip.
Bins are joined in the middle of a. Actuator 1 above
A cover 8 is screw-bonded to a main body 7 made of synthetic resin to form an outer enclosure, and a through hole 9a having a cutout at the outer end of the main body 7 is formed.
A mounting piece 9 with an opening is provided, and the actuator 1 is screwed into the door by this mounting piece 9. Further, an output shaft 4 connected to the door lock mechanism 2 projects into a hole 1o opened in the main body 7 through a seal 12.

On the other hand, a motor 13 is disposed in the lower part of the main body 7, and a small gear 14 of a speed reduction mechanism is attached to the motor shaft 13a. A gear 15 meshes with this small gear 14, and this gear 15 is attached to a pinion gear 17 via a spring 16 having elasticity in the direction of rotation. A clutch input gear 21 has its outer teeth 21d meshing with the pinion gear 17, and as shown in FIG.
a, 21a and an arcuate lever hole 21b are provided, and rollers 22, 22 connected to both ends of a return spring 23 are engaged with these roller guide walls 21a, 21a, as shown in FIG.

19 is a lever drum, and a brake spring 20 is attached to its outer periphery.
is attached, and both ends 20a of this spring 20 abut against a stopper portion 7a of the main body 7 to restrict movement. Further, a lever 19a is provided protruding from one side of the lever drum 19 on the outer peripheral side, and this lever 19a is attached to the clutch input gear 21.
is inserted into the lever hole 21b. Reference numeral 24 indicates a clutch output gear, and a transmission convex portion 24a provided thereon is engaged with and assembled with the inner wall 21c of the clutch input gear 21. The clutch input gear 21. The lever drum 19 and the clutch output gear 24 are uniaxially rotatably supported by a clutch shaft 25. Further, the gear 24b of the clutch output gear 24 meshes with an output key 726 provided coaxially with the output shaft 4, and the recess 26b of the output gear 26 is connected to the plate 27.
is engaged with the convex portion 27b. The plate 27 and the output shaft 4 are fixedly connected to each other.

Note that 28 is a stopper that restricts the rotation range of the output gear 26.

Next, the operation will be explained. When the lock knob 2b is pulled up and the lock mechanism 2 is in the unlocked state, the link part 5 of the door lock actuator 1 is on the tlNLOcK side. In this state, the driver should press the hand switch (
(not shown) is put into the lock side, a holding circuit (not shown) is activated, and the motor 13 is rotated for a set time (for example, 0.5 seconds), causing the small gear 14. The pinion gear 17 is rotated while the spring 16 is rotationally compressed via the reduction gear 15.

This rotation of the pinion gear I7 is transmitted to the connected clutch input gear 21, thereby bringing the clutch into a connected state. The clutch is connected as shown in FIG. 8(A).The clockwise rotation input to the clutch input gear 21 rotates relative to the lever 19a, and the lever 19a blocks the movement of the roller 22 and stretches the return spring 23. Then, the roller 22 is pushed outward in the radial direction along the roller guide wall 21a, and the roller 22 comes into contact with the clutch input gear inner wall 21c and stops moving. (FIG. 8(a)) At that time, the lever 19a is moved to the clutch input gear 21 by the sliding between the brake spring 20 compressed on the outer periphery of the lever drum 19 and the lever drum 19.
rotates at the same speed.

As the clutch input gear 210 rotates, the roller 22 pushed out to the outer periphery in the radial direction engages with a transmission convex portion 24a provided on the clutch output gear 24, thereby rotating the clutch output gear 24. Then, due to the rotation of the clutch output gear 24, the output gear 26. The output shaft 4 is rotated via the plate 27, and the linker 5. The lever 2a is pulled down via the rod 3, and the locking mechanism 2 is operated to the locked state shown by the phantom line.

Thereafter, when the power supply is stopped by the timer after the set time has elapsed, the repulsive spring force of the spring 16 causes the motor 1 to
3, the rotational force in the reverse rotation direction is transmitted. This reverse rotation creates slack between the clutch input gear 21 and the clutch output gear 24, as shown by the dotted line in FIG. )), and the clutch becomes disengaged.

Note that the automatic operation from the locked state to the unlocked state and the manual operation from the unlocked state to the locked state are the same as those described above, so a description thereof will be omitted. In addition, the impact force from the output side due to forced release of the lock mechanism 2 (forced release due to door closing during door lock operation) is absorbed by the recess 26b of the output gear 26 that engages with the protrusion 27b of the plate 27 due to its elasticity. It can be deformed and absorbed to prevent it from affecting other gears.

[Problem to be solved by the invention]

Since the conventional motor-type actuator is configured as described above, the concave portion 26b of the output gear 26 gradually deteriorates and widens due to repeated impact force from the door lock mechanism 2, and thereby the convex portion 27b of the plate 27 and There was a problem that the stroke of the actuator was insufficient due to the backlash.

This invention was made in order to solve the above-mentioned problems, and it is an object of the present invention to obtain a motor-type actuator that prevents insufficient stroke of the actuator without deteriorating the output gear even when subjected to impact force from a door lock mechanism. With the goal.

[Means to solve the problem]

The motor-type actuator according to the present invention transmits the rotation of the driving member to the driven member by means of a clutch member provided between a driving member interlocked with a motor shaft and a driven member interlocked with an output shaft. In the motor-type actuator, the transmission is released when the output gear is stopped, and an output gear provided coaxially with the output shaft and a plate fixed to the output shaft have a protrusion formed by hollowing out the output gear. It is characterized by elastic engagement with a recess formed in the plate.

[For production]

In this invention, since the convex part formed by hollowing out the output gear is elastically engaged with the concave part formed in the plate, there is only one part of the convex part that is elastically deformed, and thereby the output gear and the plate are connected to each other. There is no loosening between the two, and an effect can be obtained that prevents insufficient stroke of the actuator.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
Figure 2 is a plan view of the internal structure of the motor-type actuator according to the present invention, and Figure 2 is a sectional view taken along the line ■-■ in Figure 1.The difference between the actuator of the present invention and the conventional example is that the clutch output A convex portion 26a is formed by hollowing out an output gear 26 which meshes with the gear 24 and rotates at a reduced speed, and this convex portion 26a is elastically engaged and connected to a concave portion 27a of a plate 27 fixed to the output shaft 4 by caulking.

Note that other parts are completely the same as those of the conventional example, so the same reference numerals are given and explanations are omitted.

The operation of the motor-type actuator configured as above is the same as that explained in the conventional example, so the explanation is omitted, but in this invention, when the impact force from the door lock mechanism is transmitted to the output shaft 4, the output shaft The convex portion 26a of the output gear 26, which is engaged with the concave portion 27a of the plate 27 fixed to the output gear 4, is elastically deformed to absorb the impact force. This can prevent damage to the output key 726, the clutch output gear 24, etc. that mesh with the output key 726, and the like.

Further, since the convex portion 26a of the output gear 26 is supported from both sides by the concave portion 27a of the plate 27, the convex portion 26a
6a and the recess 27a do not become loose, and as a result, the actuator does not have insufficient stroke.

In addition, in the embodiment, explanation has been given of an actuator that solves the insufficient stroke of the actuator, but a convex portion is provided on the small diameter portion of the output gear 26, and the convex portion turns on a switch when the output shaft 4 rotates, thereby controlling the amount of rotation. Using an electrical output method also has the advantage that accurate output can be obtained without deformation of the convex portion.

〔Effect of the invention〕

As explained above, according to the present invention, a convex portion is formed on the output gear that meshes with the clutch output gear and rotates at reduced speed, and this convex portion is elastically engaged and connected to the concave portion of the plate caulked and fixed to the output shaft. As a result, even if an impact force is received from the output shaft side, it is absorbed by the above-mentioned convex portion of the output gear, and this eliminates the lack of stroke of the actuator without causing play in the output gear, improving accuracy. This is a motor-type actuator with high performance.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the internal structure of a motor-type actuator according to an embodiment of the present invention, and FIG.
3 is a front view of an example in which a conventional motor-type actuator is applied to an automobile door lock, and 4 is a sectional view taken along the line.
The figure is a plan view of the internal structure of a conventional actuator, FIG. 5 is a sectional view at ■vl in FIG. 4, FIG. 6 is a detailed view of the link bar, and FIG. 7 is an exploded perspective view of a conventional clutch mechanism.
FIGS. 8(A) to 8(T) are operation process diagrams of a conventional clutch mechanism. 1... Actuator, 2... Door lowering mechanism, 3
...Rod, 4...Output shaft, 5...Link par
7...Body, 8...Cover 13...Motor, 1
4... Small gear, 15... Reduction gear, 16... Spring, 17... Binion gear, 19... Lever drum, 19a... Lever 20... Brake spring, 21... Clutch Input gear, 21a...roller guide wall, 21b...hole, 21c...inside! , 22-・
・Roller, 23...Return spring, 24...
Clutch output gear, 24a...transmission convex portion, 25...
Clutch shaft, 26...output gear, 26a...convex portion,
27... Plate, 27a... Recessed portion. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] A clutch member provided between a driving member interlocked with the motor shaft and a driven member interlocked with the output shaft transmits the rotation of the driving member to the driven member, and releases the transmission when the motor stops. In the motor-type actuator, an output gear provided coaxially with the output shaft and a plate fixed to the output shaft are configured such that a convex portion formed by hollowing out the output gear is elastically engaged with a concave portion formed in the plate. A motor-type actuator characterized by: