JPH02260013A - Revolving position control actuator - Google Patents

Abstract

PURPOSE:To improve the durability and simultaneously to control an accurate intermediate angle position for a long period for a revolving position control actuator by arranging a solenoid in the same vertical direction as the direction of the long axial core of an output axis and also forming a circular stop groove. CONSTITUTION:A solenoid 25 including a variable iron core 29, etc., is arranged in the same vertical direction as the direction of the long axial core of an output axis 20. A sector gear 22 is formed of a circular stop groove 22C crossing an arched groove 22A and at the same time a control part 30 is formed of a cylindrical part 30A which moves within the groove 22A and is engaged with the end part of the groove 22A and a conical part 30B which links the part 30A and moves forward/back to /from the groove 22C. The maximum shift angle range of the gear 22 is controlled via the part 30 and the end part of the groove 22A. Then a motor 23 and the solenoid 25 are energized and the part 30B moves into the groove 22C. Thus the revolution of the gear 22 is stopped and the axis 20 is controlled to an intermediate angle position. Thus it is possible to prevent the degradation of the dynamic characteristics of the iron core 29, i.e., the part 30 for a long period. Then the durability is improved and an accurate intermediate angle position is controlled for a long period for the revolving position control actuator.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a sector gear that rotates synchronously with an output shaft,
Consisting of a motor that applies rotational force to the sector gear and a solenoid that applies stopping force to the sector gear, it is used for rotational position control that electrically controls the rotational position of the output shaft depending on how the motor and solenoid are energized. The present invention relates to an actuator, and this actuator is used, for example, as a drive source for a rotary valve that controls the opening area of an orifice arranged in an oil flow path in a shock absorber.

[Conventional technology]

Conventionally, a rotary position control actuator used for boat fishing is shown in "Car Electronics" published by Sankaido Publishing, pages 102 and 103. This is shown in Figure 1.
This will be explained in detail with reference to FIG.

Reference numeral 1 denotes an output shaft that applies a driving force to, for example, a rotary valve of a shock absorber, and is arranged in the case S so as to be freely rotatable in the vertical direction.

Reference numeral 2 denotes a sector gear integrally formed to rotate synchronously with the output shaft 1, and this sector gear 2 has an arcuate groove 2A having an arcuate shape with reference to the axis of the output shaft 1, and an arcuate groove 2A. Groove 2
A rectangular groove 2C is bored further outward from the outer groove end surface 2B of A. 2D is a gear provided on the outer end surface of the sector gear 2. 3 is a motor attached to the case S, and a pinion gear 4 that meshes with the gear 2D of the sector gear 2 is attached to the output shaft of the motor 3.

Further, 5 is a solenoid, in which a coil 7 is wound around a coil bobbin 6, and a movable iron core 9 is movably arranged opposite to a fixed iron core 8 provided inside the coil bobbin 6. The solenoid 5 (including the movable core 9) is arranged horizontally (perpendicular to the longitudinal axis of the output shaft 1).

10 is a regulating part formed integrally with the movable iron core 9;
A cylindrical portion 10A is formed at the L-shaped bent end of the regulating portion 10, and this cylindrical portion IOA is disposed within the arcuate groove 2A and moves forward and backward into the rectangular groove 2C. Reference numeral 11 denotes a spring that applies an elastic force in a direction to separate the movable iron core 9 from the fixed iron core 8.

[Problem to be solved by the invention]

This conventional rotary position control actuator has the following problems.

(2) Since the solenoid 5 is arranged horizontally, sliding resistance occurs between the vertical lower part of the movable core 9 and the coil pobbin 6 simply due to the weight of the movable core 9.

According to this, wear occurs on the sliding portion, and as this wear progresses, the amount of engagement of the cylindrical portion 10A in the arcuate groove 2A decreases, which is undesirable.Furthermore, as the wear progresses, the sliding resistance changes. , the dynamic characteristics of the movable core change, which is undesirable.

■When the motor 3 and solenoid 5 are energized, the cylindrical portion 10A enters the rectangular groove 2C, thereby inhibiting the rotation of the sector gear 2 and controlling the intermediate angular position of the output shaft 1. When the cylindrical portion 10A enters, the sector gear 2 receives an inertia force in the rotational direction from the motor 3, and the cylindrical portion 10A collides with the side wall J of the rectangular groove 2C.

This prevents the cylindrical portion 10 from being used repeatedly over a long period of time.
A or the side wall J of the rectangular groove 2C is abraded, and this abrasion causes a change in the set angular position, which is undesirable.

[Means to solve problems]

The rotary position control actuator of the present invention was created in view of the above problems, and its purpose is to:
The object of the present invention is to provide an actuator that has excellent durability and can accurately control an intermediate angular position over a long period of time, and to achieve the above object, the following steps have been taken.

In other words, a sector that rotates synchronously with the output shaft and has an arcuate groove drilled in an arc shape around the axis of the output shaft, and a stop groove drilled in the middle of the arcuate groove. Gear: A motor that applies rotational force to the sector gear via a pinion gear; A fixed iron core fixedly placed in a coil bobbin around which a coil is wound; A rotary position control device comprising: a movable iron core disposed in a freely movable manner; and a solenoid provided at an end of the movable iron core with a regulating portion that moves within the arcuate groove of the sector gear and advances and retreats within the stop groove; In the actuator for the sector gear; the stop groove of the sector gear is made circular across the arcuate groove, and the regulating part formed at the end of the movable core is moved within the arcuate groove and engaged at the groove end of the arcuate groove. It is formed by a cylindrical part that stops, and a conical part that is connected to the cylindrical part and moves forward and backward into a circular stop groove, and the maximum movement angle range of the sector gear is controlled by the cylindrical part of the regulating part and the groove end of the arcuate groove. This is an actuator for rotational position control in which the intermediate angular position of the sector gear is controlled by the conical part of the stop part entering the stop groove and stopping F by energizing the solenoid.

[Effect]

When controlling the intermediate angular position of the output shaft, the motor and solenoid are energized. According to this, the conical portion of the regulating portion enters the circular stop groove, thereby stopping the rotation of the sector gear and controlling the output shaft to an intermediate angular position.

〔Example〕

Hereinafter, one embodiment of the rotational position control actuator according to the present invention will be described with reference to FIGS. 3 and 4.

Reference numeral 20 denotes an output shaft disposed in the case S via a bearing 21 so as to be rotatable in the vertical direction. A sector gear 22 that rotates synchronously with the output shaft 20 is integrally formed on the output shaft 20 in a horizontal direction orthogonal to the longitudinal axis of the output shaft 20. The sector gear 22 has a groove end portion 22B with both ends closed, with the axis C of the output shaft 20 as a reference.
', 22B' arc-shaped arcuate groove 22A
and an arcuate groove 22A in the intermediate part in the arcuate length direction of the arcuate groove 22A.
A circular stop groove 22C is bored across A, and a gear 220 is provided on the end face of the sector gear 22 on the opposite side of the arcuate groove 22A across the output shaft 20.

23 is a motor attached to the case S, and the gear 22 of the sector gear 22 is connected to the output shaft of this motor 23.
A pinion gear 24 meshed with D is attached.

25 is a solenoid attached to the case S, in which a coil 27 is wound around a coil bobbin 26, and a movable iron core 29 is movably arranged opposite to a fixed iron core 28 provided inside the coil bobbin 26. .

The solenoid 25 including the movable iron core 29 and the like is arranged in the same vertical direction as the longitudinal axis direction of the output shaft 20.

Reference numeral 30 denotes a regulating section integrally formed to move synchronously with the movable iron core 29, and this regulating section 30 is disposed in the vertical direction. That is, more specifically, it is the same as the longitudinal axis direction of the movable iron core 29. The regulating part 30 includes a cylindrical part 3OA that moves within the arcuate groove 22A, and a conical part 30 whose diameter increases downward from the lower part of the cylindrical part 30A.
It is formed by B.

Reference numeral 31 denotes a spring that biases the movable iron core 29 in a direction to separate it from the fixed iron core 2B, and when the solenoid 25 is not energized, the conical portion 30B of the regulating portion 30 is positioned away from the stop groove 22C by this spring 31. .

Next, its effect will be explained.

First, the control of the maximum movement angle of the output shaft 20 will be described. At this time, the solenoid 25 is in a non-energized state. In this state, when the motor 23 is energized and rotated forward (clockwise in FIG. 4), the pinion gear 24 also rotates clockwise in synchronization with the motor 23. According to this, the rotation of the pinion gear 24 is transmitted to the sector gear 22 via the gear 220, so that the sector gear 22 rotates counterclockwise in FIG. 4.

Therefore, the restricting portion 3 inside the arcuate groove 22A of the sector gear 22
00 The cylindrical part 30A moves, and the lower outer surface of the cylindrical part 30A in FIG. 4 is the groove end 22 of the arcuate groove 22A.
When in contact with B', counterclockwise rotation of the sector gear is inhibited and the angular state of the first output shaft 20 can be maintained.

Next, when the motor 23 is energized with the polarity changed, the motor 23 rotates in reverse (counterclockwise in FIG. 4), and the pinion gear 24 also rotates counterclockwise in synchronization with the motor 23.

According to this, the sector gear 22 is the pinion gear 2
4 is transmitted through the gear 220, so the rotation of the 4th
In the figure, the sector gear 22 rotates clockwise. Therefore, the cylindrical portion 30A of the regulating portion 30 moves within the arcuate groove 22A of the sector gear 22, and the cylinder! 30A in FIG. 4, the upper outer surface is the groove end 2 of the arcuate groove 22A.
2B'', the clockwise rotation of the sector gear 22 is inhibited and the angular state of the second output shaft 20 can be maintained.

That is, the maximum movement angle range of the output shaft 20 depends on the angular states of the first and second output shafts 20.

Note that the maximum movement angle range of this output shaft 20 is within the arcuate groove 22A.
The control of the intermediate angular position of the zero-order output shaft 20, which is appropriately determined by the settings of the groove end portions 22B' and 22B'', will be described.

Now, suppose that the output shaft 2G is in the angular state of the second output shaft 20 described above (the cylindrical portion 30A is the groove end 22B# of the arcuate groove 22A).
The case of moving it to an intermediate angular position will be explained. For this.

The motor 23 is rotated clockwise and the coil 27 of the solenoid 25 is energized.

According to this, the sector gear 22 rotates counterclockwise in the same manner as described above, and on the other hand, when the solenoid 25 is energized, the movable core 29 is attracted toward the fixed core 28 against the force of the spring 31.

Therefore, when the sector gear 22 rotates counterclockwise,
The cylindrical portion 30A of the regulating portion 30 moves within the arcuate groove 22A and moves from the conical portion of the conical portion 30B to the arcuate groove 22A.
It moves while coming into contact with the lower groove end.

Then, as the rotation of the sector gear 22 progresses and the circular stop groove 22C matches the conical portion 30B,
The conical portion 30B of the regulating portion 30 enters into the stop groove 22C. This is because the regulating part 30 is connected to the first
This is due to the upward suction in the figure.

Therefore, the rotation of the sector gear 22 is inhibited by the conical portion 30B of the regulating portion 30, and the intermediate angular position of the output shaft 20 can be controlled. Incidentally, the angle and stepwise control of this intermediate angular position can be freely controlled by changing the position and number of the stop grooves 22C.

〔Effect of the invention〕

According to the rotational position control actuator according to the present invention described above, the following effects are achieved.

■Since the solenoid is arranged in the same vertical direction as the axial direction of the output shaft, the contact position between the movable core and the coil bobbin is not always the same, and the gravity of the movable core is applied to the contact area between the movable core and the coil bobbin. Since this does not work, the sliding resistance between the movable core and the coil bobbin can be reduced, and the long-term deterioration of the dynamic characteristics of the movable core, that is, the regulating section, can be prevented.

■Even if the upper end (fixed core side) or lower end of the movable core wears out, the stop groove is circular and the conical part of the restriction part is inserted into it, so the vertical contact position will only change and the output will be reduced. The intermediate angular position with respect to the axis does not change in any way, and an accurate intermediate angular position can be set and maintained over a long period of time.

Furthermore, even if wear occurs due to contact between the stop groove and the conical part, it will only change the contact position between the stop groove and the conical part in the vertical direction, and will not change the intermediate angular position of the output shaft. .

■According to the fact that the function of stopping the sector gear at an intermediate angular position is achieved by a circular stop groove and a conical part.
The stop control by the regulating part can be controlled in a large contact area by the arcuate groove (excluding the inside of the rack) and the conical part, so the contact load on the contact part can be reduced and wear on the contact part can be reduced. It was possible to do so.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of the main part of a conventional actuator for controlling rotational position, Fig. 2 is a cross-sectional view of the main part taken along the line ■-■ in Fig. 1, and Fig. 3 is an actuator for controlling rotational position according to the present invention. FIG. 4 is a cross-sectional view of the main part taken along line rV-IT in FIG. 3. FIG. 20,,,output shaft 22. , Sector gear 22A, Arcuate groove 22B', 22B', Groove end 22C,
,,,stop groove 22D,,,,gear 23,,,
, motor 24. ,,,pinion gear-25,
,,, Solenoid 29. ,,,Movable iron core 30,,
,,Regulating part 30A,,,Cylindrical part 30B
,,,,conical part

Claims (3)

[Claims] (1) An arcuate groove that rotates synchronously with the output shaft and is drilled in an arc shape around the axis of the output shaft, and a stop groove that is drilled in the middle of the arcuate groove. A sector gear; A motor that applies rotational force to the sector gear via a pinion gear; A fixed iron core fixedly placed in a coil bobbin around which a coil is wound; a movable iron core disposed so as to be freely movable; In a position control actuator; The stop groove of the sector gear is made circular across the arcuate groove, and the regulating portion formed at the end of the movable iron core is moved within the arcuate groove to close the groove end of the arcuate groove. The sector gear is formed by a cylindrical part that locks at the cylindrical part, and a conical part that is connected to the cylindrical part and moves forward and backward into a circular stop groove. A rotary position control actuator in which the intermediate angular position of the sector gear is controlled by the conical part of the stop part entering the stop groove and stopping by energizing the solenoid. (2) The rotary position control actuator according to claim 1, wherein the solenoid and the regulating portion are arranged in a vertical direction. (3) The rotation control actuator according to claim 1, wherein the movable core of the solenoid and the regulating portion are arranged on the same axis.