JP2000136735A - Actuator for vehicular constant speed travel device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To oppose the mutual attracting surfaces of both by inclining an armature member, and suitably bring the attracting surfaces into close contact with each other by supporting the armature member with a required play so as to be opposed to the exciting coil side attracting surface when integrating an exciting coil and an output member. SOLUTION: In an actuator for automatically opening/closing a throttle valve through a wire 6, an electric motor 3 is driven, and when a secondary speed reduction gear 12 is revolved while self-rotating around the inner periphery of a fixed internal teeth gear 13 through a primary speed reduction gear 10 and a ball bearing 11 meshing with a pinion 9, torque of the secondary speed reduction gear 12 is transmitted to a rotary internal teeth gear, so that the final speed reduction gear formed integrally with the rotary internal teeth gear is rotated. In this case, a sector gear 5 and a semicircular sheave 7 are integrated by attracting an armature plate 19 opposed with a play by excitation of an exciting coil 18, and the sector gear 5 and the semicircular sheave 7 are coaxially rotated by rotation of the final speed reduction gear to adjust opening of the throttle valve by towing the wire 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator for a constant speed traveling device for a vehicle.

[0002]

2. Description of the Related Art Conventionally, in an actuator for a constant speed traveling device for a vehicle used in an automobile or the like, a wire connected to a throttle valve is driven by the actuator,
Some throttle valves open and close automatically. When performing constant-speed traveling control in such an apparatus, a control amount for matching the traveling vehicle speed to the target vehicle speed is calculated, and the actuator is driven accordingly. Some actuators use an electric motor as a power source, and the electric motor drives an output member via a speed reduction mechanism or the like.

[0003] As the output member, for example, a fan-shaped pulley-like member capable of winding and pulling a wire is used, and the output member is controlled to rotate within a predetermined angle range. I have. Also, when controlling the throttle valve to close, the motor is reversed for gentle deceleration, and for sudden deceleration, the clutch provided in the transmission mechanism is disconnected and the wire is returned. It can be returned to the fully closed state by the spring force of the spring.

[0004]

SUMMARY OF THE INVENTION In the actuator for a constant-speed traveling device as described above, the winding /
A transmission member rotatably supported in the feeding direction and transmitting a rotational torque driven by an electric motor; and an output member rotatably supported coaxially with the transmission member and having a wire connected thereto. There is a device in which the two are integrated by magnetic coupling so as to transmit torque to a wire, so that connection / disconnection between an actuator and a throttle valve can be easily and reliably performed (for example, Japanese Patent Application Laid-Open No. Sho 63-2).
No. 59130).

[0005] This is achieved by providing an exciting coil on one of a transmission member and an output member and an armature plate on the other, and selectively exciting / demagnetizing the exciting coil.
The armature plate is attracted to the yoke of the exciting coil /
The transmission member and the output member are magnetically coupled / uncoupled from each other.

However, since the yoke of the exciting coil and the armature plate rotate relative to each other, unless they are accurately opposed to each other, that is, if they face each other at an angle, the transmission member and the output member are magnetically coupled. In this case, the adsorption surfaces do not adsorb properly, resulting in poor adsorption. For this reason, the precision of parts and the accuracy of assembly must be increased, which raises the cost of parts and lowers the workability of assembly.

SUMMARY OF THE INVENTION An object of the present invention is to provide an actuator for a constant-speed traveling device capable of improving the operation reliability without increasing the cost of parts and reducing the workability of assembling.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention controls opening and closing of a throttle valve via a wire by an actuator using a motor as a drive source in a constant-speed traveling device for a vehicle. An actuator for a constant-speed traveling device for a vehicle, comprising: a rotating torque transmitting member driven forward and reverse by the electric motor; and a coaxially and rotatably provided rotating torque transmitting member and connecting the wire. The output member, having a magnetic coupling means having an exciting coil and an armature member provided between the two to selectively integrate the rotational torque transmitting member and the output member, the armature member, When the two members are integrated, they are supported with a certain play so as to face the exciting surface on the exciting coil side. Providing constant speed running device actuator for a vehicle.

With this configuration, even if the holder of the armature member and the yoke of the exciting coil have an angle at the time of suction, the armature member is inclined and the suction surfaces of the two face each other and come into close contact with each other.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to specific examples shown in the accompanying drawings.

FIGS. 1 and 2 show an electric actuator for cruise control to which the present invention is applied. The actuator 1 functions to increase or decrease the traction force applied to a wire connected to a throttle valve by using the electric motor as a power source, and includes an electric motor 3 housed in a common casing 2, a reduction gear 4, and a reduction gear 4, a sector gear 5 as a rotary torque transmitting member driven by a final reduction gear, and a semicircular sheave 7 as an output member wound with a wire 6 connected to a throttle lever. And a magnetic coupling means 8 for intermittently connecting (integrating) with the control unit 7 as desired.

The reduction gear 4 has a primary reduction gear 10 meshed with a pinion 9 fixed to the output shaft of the electric motor 3, and a ball bearing 11 on the lower surface of the primary reduction gear 10 at a position eccentric from the center of the primary reduction gear 10. Secondary reduction gear 1 supported through
2, a fixed internal gear 13 which is concentric with the primary reduction gear 10 and is substantially integral with the casing 2, has a different number of teeth from the fixed internal gear 13, and rotates coaxially with the primary reduction gear 10. And a final reduction gear 15 formed on a common member with the rotating internal gear 14.

The primary reduction gear 10 rotates about a first fixed shaft 16 erected on the bottom wall of the casing 2. The secondary reduction gear 12 includes a fixed internal gear 13 and a rotary internal gear 1.
4 and revolves around the first fixed shaft 16 while rotating around the eccentric shaft as the primary reduction gear 10 rotates. The rotation of the secondary reduction gear 12 causes the primary reduction gear 10 to rotate.
At the same time, the rotating internal gear 14 pivotally mounted on the first fixed shaft 16 rotates, and a rotational force is output from the final reduction gear 15 integrated with the rotating internal gear 14.

The sector gear 5 is meshed with the final reduction gear 15, and the sector gear 5 is pivotally mounted on a second fixed shaft 17 erected on the bottom wall of the casing 2 so as to be parallel to the first fixed shaft 16. Have been.

When the motor 3 is driven, the primary reduction gear 10 meshing with the pinion 9 rotates. This torque is transmitted to the secondary reduction gear 12 via the ball bearing 11. Since the fixed internal gear 13 does not rotate, the secondary reduction gear 12 revolves while rotating on its inner periphery, but at the same time, the rotating internal gear 1
4, the rotational force of the secondary reduction gear 12 is transmitted to the rotating internal gear 14. As a result, the final reduction gear 15 integrated with the rotating internal gear 14 rotates. Since the central axis of the final reduction gear 15 is fixed to the casing 2, the sector gear 5 meshed with the casing 2 rotates. The semicircular sheave 7 is pivotally mounted on the second fixed shaft 17 common to the sector gear 5 and the sector gear 5 and the semicircular sheave 7 can rotate coaxially with each other.

As shown in FIGS. 2 and 3, an exciting coil 18 constituting the magnetic coupling means 8 is received in a coil housing 5a formed integrally with the sector gear 5, and a yoke 18a is provided at the center thereof. Is provided. Further, the semicircular sheave 7 is provided with an armature plate holding portion 7a for holding an armature plate 19 as an armature member that can face the yoke 18a. When the exciting coil 18 is excited, the armature plate 19 exposed from the window 7c of the yoke 18a and the armature plate holding portion 7a is attracted to the sector gear 5 and the semicircular sheave 7
Are integrated with each other and can rotate together.

Here, the feed line 2 for the exciting coil 18
In a state where the sector gear 5 and the semicircular sheave 7 have a positional relationship that allows them to be integrated with each other in a state where a voltage is applied from a power supply (not shown) to the semicircular sheave 7 (in the present embodiment, Since the switch provided on the coil housing 5a side is pressed and closed by the protrusion 7b provided on the armature plate holding portion 7a), the exciting coil 18 becomes conductive and the exciting coil 18 is excited.

As shown in FIG. 4, the armature plate 19 is received in the armature plate holding portion 7a with a play L so that the armature plate 19 can be tilted to some extent. Due to this play L, FIG.
As shown in (b), for example, when the sector gear 5 and the semicircular sheave 7 are in a positional relationship that can be integrated with each other,
Even if the yoke 18a and the armature plate holding portion 7a do not face each other, the yoke 18a and the armature plate 19
, The desired coupling force is obtained, and the sector gear 5 and the semicircular sheave 7 are surely integrated.

In the present embodiment, first, at the time of acceleration control, the exciting coil 18 is set in the excited state, and the semicircular sheave 7 integrated with the sector gear 5 is rotated in the direction shown by the arrow A in FIG. Then, the wire 6 connected to the throttle lever is pulled to adjust the throttle opening. During the deceleration control, the electric motor 3 is rotated in the reverse direction, and the semicircular sheave 7 integrated with the sector gear 5 is rotated in the direction opposite to the arrow A. Further, at the time of sudden deceleration or at the time of release of the constant-speed traveling control, the electromagnetic device 8 is demagnetized to disconnect the semicircular sheave 7 from the sector gear 5, thereby eliminating the traction force on the wire 6. The throttle lever is returned to the initial position by a separately provided spring.

[0020]

As described above, according to the actuator for a constant-speed traveling device for a vehicle according to the present invention, a rotating torque transmitting member driven forward and reverse by an electric motor, and a coaxially and rotatably provided on the rotating torque transmitting member. An exciting coil and an armature member are provided between the output member and the output member to which a wire for controlling the opening and closing of the throttle valve is selectively integrated, and the armature member is partially connected to either of the two members. When the two members are integrated, the armature member faces the excitation coil side suction surface and the two suction surfaces come into close contact with each other.
Since a desired coupling force is obtained and both members are surely integrated, desired operation reliability can be ensured without maintaining high component accuracy and assembly accuracy, and the cost is reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of an actuator to which the present invention is applied.

FIG. 2 is a longitudinal sectional view taken along the line II-II in FIG.

FIG. 3 is an exploded perspective view showing a main part of a magnetic coupling unit to which the present invention is applied.

FIG. 4 is a plan view of only a semicircular sheave of an actuator to which the present invention is applied.

FIGS. 5A and 5B are plan views showing the relationship between a yoke of a sector gear side exciting coil and a semicircular sheave side armature plate of an actuator to which the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Actuator 2 Casing 3 Electric motor 4 Reduction gear 5 Sector gear 5a Coil storage part 5b Outer surface 6 Wire 7 Semicircular sheave 7a Armature plate holding part 7b Projection 7c Window 8 Electromagnetic device 9 Pinion 10 Primary reduction gear 11 Ball bearing 12 Secondary reduction gear Reference Signs List 13 fixed internal gear 14 rotating internal gear 15 final reduction gear 16 first fixed shaft 17 second fixed shaft 18 excitation coil 18a yoke 19 armature plate 20a / 20b power supply line

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshio Matsushima 1-2681, Hirosawacho, Kiryu-shi, Gunma Co., Ltd. Inside Mitsuba Co., Ltd. (72) Hideyuki Nagai 1-2681-1, Hirosawacho, Kiryu-shi, Gunma F, Mitsuba Co., Ltd. Terms (reference) 3D044 AA45 AA49 AB01 AD04 3G065 CA00 CA20 DA05 DA06 KA05 3G093 BA23 BA28 CB11 CB12 EA09 EC02

Claims (1)

[Claims] 1. An actuator for a constant-speed traveling device for a vehicle, wherein the opening and closing of a throttle valve is controlled via a wire by an actuator using a motor as a drive source in the constant-speed traveling device for a vehicle. A rotating torque transmitting member driven in reverse, an output member coaxially and rotatably provided on the rotating torque transmitting member and connected to the wire, and selectively rotating the rotating torque transmitting member and the output member; Magnetic coupling means having an exciting coil and an armature member provided between the two so as to be integrated, so that the armature member faces the excitation coil side attraction surface when the two members are integrated. An actuator for a constant-speed traveling device for a vehicle, wherein the actuator is supported with a certain amount of play.