JPH076313B2 - Actuator for automobile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle actuator.

(Prior Art) Japanese Utility Model Publication No. 63-48860 and Japanese Patent Application Laid-Open No. 63-176581
In the publication, as shown in FIG. 6, in an actuator case, a motor, a gear a rotated by a rotating shaft of the motor, and a cam groove b formed on one surface of the gear a.
And a protrusion d of a rotating arm c that engages with the cam groove b, and when the gear a rotates right or left, the cam groove b swings the protrusion d in the radial direction. Lock·
It is described that the unlock can be switched.

(Problem to be Solved by the Invention) Since the gear a of the known example has a structure in which the center cannot be returned, it is always necessary to rotate the gear a once when locking or unlocking. There are challenges that lack speed. If the gear a of the known example is returned to the center, the projection d is located at the center e position, and thus is located at the e position of the narrow cam groove b. At this position, the projection d does not move in the radial direction. You can no longer push the sill knob to lock it or pull the sill knob to unlock it. In other words, if you lock / unlock by operating the sill knob,
Along with this, the protrusion d is also displaced to the locked position and the unlocked position, but when the protrusion d returns to the center and reaches the e position, it does not move in the radial direction, which is impossible.

The present invention has a structure capable of returning to the center in the known example shown in FIG. 6, so that switching can be performed quickly and the composition is robust.

(Means for Solving the Problem) Therefore, according to the present invention, in the actuator case 12, the motor 1, the gear 4 rotated by the rotation shaft 2 of the motor 1, and the cam groove formed on the one surface 4a of the gear 4 are provided. 5
And a protrusion 10 of the rotating arm 9 that engages with the cam groove 5, and when the gear 4 rotates rightward or leftward, the protrusion 10 is swung in the radial direction by the cam groove 5. Lock·
In the unlockable switch, a center return spring 18 is attached to the gear 4 so that when the motor 1 is de-energized, the gear 4 returns to the center by spring elasticity. An intermediate portion of the cam groove 5 is formed in a center portion 7a having a wide width in the radial direction so that the protrusion 10 swings in the radial direction between the locked position and the unlocked position when the gear 4 returns to the center. Gear 4
The contact protrusion 21 is provided on the outer peripheral portion of the actuator case 12
The vehicle actuators are provided with stoppers 22 that stop the rotation of the gear 4 when the abutting projections 21 abut on the sides.

(Embodiment) When one embodiment of the present invention is described with reference to the drawings, 1 is a motor, and a thread groove 3 is formed on a rotary shaft 2 of the motor 1. A gear 4 whose axis is orthogonal to the rotary shaft 2 is meshed with the thread groove 3. One surface 4a of the gear 4 has a cam groove on one side.
An intermediate portion surrounded by 6a and the cam edge 6b on the other side forms a cam groove 5 having a wide center portion 7a in the radial direction. Reference numeral 7 denotes a one-side rotation terminal end formed at one end of the cam groove 5, and numeral 8 denotes another side rotation terminal end formed at the other end of the cam groove 5.

Reference numeral 9 in FIG. 2 denotes a rotating arm, which is parallel to the surface of the gear 4 and has the cam groove 5 of the gear 4.
From the position facing to the outside of the gear 4,
A protrusion 10 projecting at a right angle is provided on the tip end portion, the protrusion 10 is engaged with the cam groove 5, and the base portion is rotatably attached to a vertical axis 11 parallel to the axis of the gear 4.

Reference numeral 12 denotes an actuator case, the vertical axis 11 is attached to the actuator case 12, and an arm is provided at a portion of the vertical axis 11 projecting from the actuator case 12.
The base of 13 is fixed, the arm 13 is formed so as to rotate when the vertical axis 11 rotates, and a rod 14 connected to a locking device is pivotally attached to the tip of the arm 13.

In FIG. 2, 15 is an auxiliary turning arm fixed to the vertical axis 11,
The auxiliary rotation arm 15 transmits the rotation of the rotation arm 9 to the vertical axis 11. That is, the tip of the auxiliary turning arm 15 is bent in parallel with the vertical axis 11 to form a bent portion 15a, and the base side of the turning arm 9 is projected in parallel with the auxiliary turning arm 15 to overlap. The portion 25 is formed, and the bent portion 15a and the overlapping portion 25 are held between the one end 16a and the other end 16b of the coil spring 16 wound around the vertical axis 11. When the rotating arm 9 rotates, the coil spring 16 transmits the rotation to the auxiliary rotating arm 15 via the coil spring 16 to rotate the vertical axis 11, but the vertical axis 11 has a strong resistance. In the case where a force is applied, only the coil spring 16 is opened and the rotation is not transmitted to the auxiliary turning arm 15.

A shaft 17a is provided at the center of the other surface 4b of the gear 4, a concentric circular arc projection 17b is provided on the shaft 17a, and one end of a center return spring 18 wound around the shaft 17a is attached to one side 19 of the circular projection 17b. , The other end is engaged with the other side 20 of the circular arc projection 17b, and the gear 4 rotated by the motor 1 becomes free when the motor 1 is de-energized, and the center return spring 18 elastically moves the center to the center as shown in FIG. Restore. The center return spring 18 is well known and various types are available. In the present embodiment, a part of the center return spring 18 is fixed to the actuator case 12 side, and when the gear 4 rotates left and right (a, b), An example is shown in which the center return spring 18 is extended on one side 19 or the other side 20 of the circular arc projection 17b to return its elastic center.

A contact protrusion 21 is formed on the outer periphery of the gear 4 on the other surface 4b side. When the contact protrusion 21 contacts a stopper 22 provided on the actuator case 12 side, the rotation of the gear 4 is stopped. The abutment projection 21 abuts the surface B of the stopper 22 to stop the rotation when the gear 4 half-rotates from the center position A to the left and right. In this embodiment, when the gear 4 at the center is shown in FIG. 1, the protrusion 21 is formed at the A position and the stopper 22 is formed at the B position.

The stopper 22 is made of synthetic resin, rubber, or the like, and is fitted and fixed in a groove 23 formed in the actuator case 12 (FIG. 4), or the stopper 22 is fitted and fixed in a protrusion 24 formed on the actuator case 12. (Fig. 5). It should be noted that two B's shown in FIG. 1 mean the left and right contact surfaces.

(Operation) Next, the operation will be described.

Since the present invention has the above-described configuration, when the motor 1 is not energized, that is, before the operation is started, the gear 4 is returned to the center position by the elastic force of the center return spring 18. Therefore, the protrusion 10 is located at the center portion 7a indicated by x in FIG. Since the center portion 7a has a wide radius projection, the lock knob is switched by operating the sill knob, and in conjunction with this, the rod 14, arm 13, vertical axis 1
Even if the protrusion 10 moves in the radial direction via the coil spring 16, the auxiliary rotation arm 15, and the rotation arm 9, the movement is free and can be performed without any trouble.

With the center returned, the motor 1 is energized and the rotating shaft 2
When the gear 4 is rotated in the normal direction and the gear 4 is rotated to the right half in the direction of arrow a,
The protrusion 10 at the tip of the rotating arm 9 engaged with the cam groove 5
Is guided to the center side of the gear 4 by the action of the cam edge 6a on one side of the cam groove 5 to reach the one-side rotation end portion 7, and the protrusion 10
The left end of the coil spring 16 pushes the other end 16b of the coil spring 16, and the one end 16a of the coil spring 16 rotates the auxiliary turning arm 15 to move the vertical axis 11 along the vertical axis 11. An arm fixed to the vertical axis 11 by rotating
Rotate 13 to rotate rod 14 to switch the lock device to lock, but this switching requires only half rotation of gear 4 because gear 4 has returned to the center, and switching by motor rotation does not take time. It's extremely quick.

Further, when the gear 4 is half-turned in the direction of a by the motor 1, the contact projection 21 provided on the outer periphery of the other surface 4b of the gear 4 comes into contact with the stopper 22 provided on the actuator case 12 side, and the gear 4 is rotated. The rotation is stopped, and the power supply to the motor 1 is cut off. When the motor 1 is de-energized, the gear 4 becomes free, and the elastic force of the center return spring 18 causes it to return to the center position as shown in FIG.

When the motor 1 is reversed (b), the opposite is true.

(Effect) Since the gear a in the above-mentioned known example has a structure in which the center cannot be returned, there is a problem that the gear a needs to be rotated once for locking and unlocking at all times. .

However, according to the present invention, in the actuator case 12,
A motor 1, a gear 4 rotated by a rotating shaft 2 of the motor 1, a cam groove 5 formed on one surface 4a of the gear 4, and a protrusion 10 of a rotating arm 9 engaging with the cam groove 5. When the gear 4 rotates rightward or leftward, the cam groove 5 swings the projection 10 in the radial direction so that lock / unlock switching can be performed. A center return spring 18 is attached to the gear so that when the motor 1 is de-energized, the gear 4 returns to the center by spring elasticity, and when the gear 4 returns to the center, the protrusion 10 is locked to the lock position. An intermediate portion of the cam groove 5 is formed in a center portion 7a having a wide width in the radial direction so as to swing in the radial direction between the lock positions.
The contact protrusion 21 is provided on the outer peripheral portion of the actuator case 12
Since the aforesaid vehicle projections are provided with stoppers 22 for stopping the rotation of the gear 4 when the abutting protrusions 21 come into contact with the respective sides, a center return spring 18 is attached to the gear 4 so that the motor 1 When the energization is cut off, the gear 4 is configured to return to the center by the spring elasticity, so that the switching of the lock / unlock can be shortened to half the time as compared with the known example.

Since the projection 10 oscillates in the radial direction when the gear 4 returns to the center, the middle portion of the cam groove 5 is formed in the center portion 7a having a wide width in the radial direction. You can easily switch between unlocks.

Since the contact projection 21 is provided on the outer peripheral portion of the gear 4 and the stopper 22 is provided on the actuator case 12 side to stop the rotation of the gear 4, the cam groove b and the projection d of FIG. 6 are provided. It is much more robust than the one that stops in a collision.

[Brief description of drawings]

FIG. 1 is a perspective view of a motor and gears, FIG. 2 is a vertical sectional front view of essential parts, FIG. 3 is a rear perspective view of gears, FIG. 4 is a sectional view of a stopper, and FIG. 5 is another embodiment of the stopper. 6 and 6 are known examples of the present invention. Explanation of symbols 1 …… Motor, 2 …… Rotary axis, 3 …… Screw axis, 4 ……
Gears, 4a is one surface, 4b is the other surface, 5 ... Cam groove, 6a ... One side cam edge, 6b is the other side cam edge, 7 ... One side rotation end portion, 8 ... Other side rotation end portion, 9 ... Rotating arm, 10 ...
… Protrusion, 11 …… vertical axis, 12 …… actuator case,
13 …… Arm, 14 …… Rod, 15 …… Auxiliary turning arm,
15a is a bent portion, 16 is a coil spring, 17a is a shaft, 17b is an arc protrusion, 18 is a center return spring, 19 is one side, and 20 is one side.
Other side, 21 …… contact protrusion, 22 …… stopper, 23 …… groove,
24: Protrusion, 25 is a superposed section.

Claims (1)

[Claims] 1. An actuator case (12) has a motor (1), a gear (4) rotated by a rotation shaft (2) of the motor (1), a cam groove (5) formed on one surface (4a) of the gear (4), and a cam groove (5). When the gear 4 has a protrusion 10 of a rotating arm 9 which engages with it, and the gear 4 rotates rightward or leftward, the cam groove 5 swings the protrusion 10 in the radial direction to switch between locking and unlocking. The gear 4 is provided with a center return spring 18 so that when the motor 1 is de-energized, the gear 4 returns to the center by spring elasticity. An intermediate portion of the cam groove 5 is formed in a center portion 7a having a wide width in the radial direction so that the projection 10 swings in the radial direction between the locked position and the unlocked position when returning, and the outer peripheral portion of the gear 4 is formed. Abut the projection 21 on the An actuator for a vehicle, each of which is provided with a stopper 22 that stops the rotation of the gear 4 when the contact projection 21 comes into contact with the side of the chute case 12.