JPH0328191Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention relates to an electric actuator for accelerator control used, for example, in an automatic constant speed driving system for automobiles.

(Prior Art) Conventionally, for example, as an electric actuator for accelerator control in an automatic constant speed traveling system for automobiles, there has been one shown in FIG.

That is, the actuator 101 shown in FIG.
is equipped with a motor (not shown), a deceleration mechanism 102 connected to the motor, and a clutch mechanism 103 in an actuator housing 104, and a cover 1.
This actuator housing 10 by 05
4 is occluded.

The speed reduction mechanism 102 includes a worm wheel 102a that meshes with a worm (not shown) attached to a rotating shaft of a motor (not shown), and a sun gear 102b integrally formed with the worm wheel 102a.
A planetary gear (not shown) that meshes with the sun gear 102b and an internal gear 102c that meshes with the planetary gear are fitted onto the intermediate output shaft 106. A clutch plate 103g, which constitutes a part of the clutch mechanism 103, is caulked and fixed to the lower part of the clutch mechanism 103 via a leaf spring (not shown).

The clutch mechanism 103 includes a wound coil bobbin 103a, a clutch case 103b that stores the coil bobbin 103a, and the clutch plate 103g.
03a is fixed to the clutch case 103b via a boss 103d. A lead wire 103e passes through the bottom of the clutch case 103b, and the lead wire 103e drawn into the interior is soldered to a grommet terminal 103f on the winding of the coil bobbin 103a.

Further, the intermediate output shaft 106 equipped with the speed reduction mechanism 102 has one end supported by a bearing 105a provided on the cover 105, and the other end supported by a bearing 103c press-fitted into the boss 103d of the clutch mechanism 103. Supported. A pinion 106a is provided on one end side of this intermediate output shaft 106.
is fixed, and this pinion 106a is connected to a sector gear 108 fixed to one end of the final output shaft 107.
It is in a state of engagement.

(Problems to be Solved by the Invention) However, in the conventional electric actuator 101 as described above, the lead wire 103e for supplying power from the outside is connected to the clutch case 103.
The eyelet terminal 103 is passed through the bottom of the coil bobbin 103a and pulled into the inside.
Since the lead wires 103e are connected to each other by soldering, if a large amount of the lead wires 103e are exposed, the lead wires 103e may come into contact with each other, or the eyelet terminal 1
There is a problem in that there is a risk that the ends of the wires wound around 03f may come into contact with each other and cause a shot. And to prevent these,
Since the work of soldering the lead wire 103e and the work of caulking and fixing the eyelet terminal 103f must be performed carefully, these works are not only inefficient but also complicated.

(Purpose of the invention) This invention was made by focusing on the above-mentioned problems, and it is possible to prevent the occurrence of shorts caused by the lead wire and the conductor near the grommet terminal. It is an object of the present invention to provide an electric actuator that facilitates work and caulking work of eyelet terminals connected to conductive wires, and improves work efficiency.

[Structure of the idea]

(Means for Solving the Problems) The configuration of this invention includes a clutch mechanism having a clutch case that is open at one end and houses a wound coil bobbin, and a clutch plate is disposed in the opening. In the electric actuator, a notch is formed in a part of the flange surface of the opening in the clutch case that can come into contact with the clutch plate, and a lead wire is provided in the flange on the clutch plate side of the coil bobbin that protrudes outside from the notch. It is characterized by providing a lead wire connection section with a partition wall and a grommet storage section.

(Example) This invention will be explained below based on the drawings.

FIG. 1 shows an electric actuator according to an embodiment of this invention, and FIG. 2 shows an exploded view of the clutch mechanism of the electric actuator in FIG.

That is, the reference numeral 1 in FIG. 1 is an electric actuator, and inside the actuator housing 2 and the cover 3, there is a motor 4 shown by a phantom line, and a speed reduction mechanism 5 connected to the motor 4.
and a clutch mechanism 6.

The motor 4 is connected to the actuator housing 2
The motor 4 is held down and fixed by a gear shaft fixing member 4a attached to the motor 4, and a worm 4b shown by a phantom line is attached to the motor 4.

The speed reduction mechanism 5 includes a worm 4 of the motor 4.
a worm wheel 5a meshing with b and rotatably supported on the intermediate output shaft 7; and a sun gear 5b integrally formed with the worm wheel 5a.
and a fixed plate 5c meshing with the sun gear 5b and welded to the intermediate output shaft 7, and a pivot pin 5c'', 5 provided between another plate 5c'.
It has planetary gears 5d, 5d supported by C'', and an internal gear 5f that meshes with these planetary gears 5d, 5d and has a shaft hole 5e through which the intermediate output shaft 7 is inserted with some margin. At the bottom of the internal gear 5f (the lower part in FIG. 1), there is a clutch plate 6 that constitutes a part of the clutch mechanism 6.
n is caulked and fixed so as to be slidable in the vertical direction while being biased vertically via a leaf spring 5g.

The clutch mechanism 6 that fixes and releases the internal gear 5f of the reduction mechanism 5 includes a clutch plate 6n provided on the internal gear 5f, a coil bobbin 6b wound thereon to form an electromagnetic coil 6a, and a clutch plate 6n provided on the internal gear 5f. The clutch case 6c houses a coil bobbin 6b, and the coil bobbin 6b is fitted into a boss 6e which is caulked and fixed to the clutch case 6c. As shown in FIG. 2, the coil bobbin 6b has an upper flange thereof (a flange on the clutch plate 6n side in FIG. 2).
6f, a lead wire connection portion 6h extending in the outer circumferential direction
is formed. Then, the lead wire connection portion 6
A lead wire partition wall 6g is provided on the upper surface of h to prevent the lead wires 6d from coming into contact with each other, and as shown in FIG. 3 when FIG. 2 is viewed from below,
Eyelet storage portions 6i, 6i are provided on the lower surface of the lead wire connection portion 6h to prevent the wound conductive wires 6p, 6p from coming into contact with each other and to facilitate caulking and fixation of the eyelet terminals 6q, 6q. Further, a plurality of (three in this embodiment) protrusions 6j are provided on the lower flange 6f' of the coil bobbin 6b.

On the other hand, as shown in FIG. 2, the clutch case 6c has a flange surface 6n' formed by press working so as to come into contact with the clutch plate 6n.
Lead wire connection portion 6 provided on the coil bobbin 6b
h has a notch 6k into which the coil bobbin 6b can be fitted with sufficient margin, and the bottom 6c' thereof has a notch 6k which corresponds to and fits into the protrusion 6j formed on the coil bobbin 6b. Three through-holes 6l are provided. As shown in FIG. 1, the coil bobbin 6b has a lead wire connecting portion 6h provided on the upper flange 6f protruding outside from a notch 6k provided on the clutch case 6c, and a lower flange 6f'. The provided protrusion 6j is inserted into the through hole 6l of the clutch case 6c and fixed by heat caulking to prevent it from turning and coming off.

Further, an intermediate output shaft 7 fitted with the speed reduction mechanism 5
The one end 7a side is pivoted to a bearing 4c provided on the gear shaft fixing member 4a, and the other end 7b side is pivoted to a bearing 6m press-fitted into a boss 6e fixed to the clutch case 6c. It can be rotated freely. A pinion 11 is attached to one end 7a of the intermediate output shaft 7 and meshes with a sector gear 10 fixed to a final output shaft 9 provided parallel to the intermediate output shaft 7. The rotation of the motor 4, which has been decelerated, is converted into rotation and transmitted to the final output shaft 9.

Furthermore, this electric actuator 1 has rotational movement by the output of the motor 4 of the sector gear 10;
Although the sector gear 10 is rotated by the output of the motor 4 and the sector gear 10 is rotated by the output of the motor 4, there is a damper (not shown) made of an elastic material that restricts the return rotation due to the elastic force of a return spring (not shown) provided in the sector gear 10. A limit switch (not shown) is provided at the end of the range to cut off power supply to the motor 4.

Therefore, the operation of the electric actuator 1 described above will be explained.

First, power is supplied to the clutch mechanism 6 via the lead wire 6d according to a command from a microcomputer as a control unit of the automatic constant speed traveling device, and the electromagnetic coil 6a is energized. The clutch plate 6n is attracted to the flange surface 6n' of the clutch case 6c to fix the internal gear 5f, and the motor 4 rotates according to instructions from the microcomputer. Since the internal gear 5f is in a fixed state, the rotation of the motor 4 is decelerated by the deceleration mechanism 5 and transmitted to the intermediate output shaft 7 fitted with the deceleration mechanism 5.
Further, the reduced rotation is transmitted to the pinion 11 of the intermediate output shaft 7 and the sector gear 10 to rotate the final output shaft 9 and drive a throttle valve (not shown). Further, while the sector gear 10 is in operation, a limit switch (not shown) is activated at the end of the rotation range, and the power supply to the motor 4 is cut off.

Further, in response to a system release command, the electromagnetic clutch 6a is activated in response to an instruction from the microcomputer.
When the excitation is stopped, the clutch plate 6n is separated from the flange surface 6n' by the leaf spring 5g, and the internal gear 5
f is opened and becomes freely rotatable, and motor 4
The rotation is no longer transmitted to the intermediate output shaft 7, and the sector gear 10 is returned to its original position by a return spring (not shown), and the throttle valve (not shown) is returned to the closed position.

[Effect of idea]

As explained above, according to this idea,
In an electric actuator equipped with a clutch mechanism having a clutch case that is open at one end and houses a wound coil bobbin and that has a clutch plate disposed in the opening, the opening in the clutch case that can come into contact with the clutch plate is provided. A notch is formed in a part of the flange surface of the coil bobbin, and a lead wire connection part is provided on the flange of the coil bobbin on the clutch plate side, protruding outward from the notch and having a lead wire partition wall and a grommet storage part. This structure prevents the occurrence of shoots caused by the lead wires and conductors near the eyelet terminals, making it possible to efficiently solder the lead wires and swage and secure the eyelet terminals connected to the conductor wires. This has the extremely excellent effect of making it possible to

[Brief explanation of the drawing]

FIG. 1 is an explanatory vertical partial cross-sectional view showing an electric actuator according to an embodiment of the invention, FIG. 2 is a perspective assembly explanatory view showing the clutch mechanism of the electric actuator in FIG. 1, and FIG. FIG. 4 is a perspective explanatory view showing the lower side of the coil bobbin, and FIG. 4 is an explanatory vertical partial cross-sectional view showing a conventional electric actuator. 1... Electric actuator, 6... Clutch mechanism, 6b... Coil bobbin, 6c... Clutch case, 6f... Upper flange (flange), 6g
...Lead wire partition wall, 6h...Lead wire connection part,
6i...eyelet storage part, 6k...notch part, 6n...
...Clutch plate, 6n'...Flange surface.

Claims (1)

[Scope of utility model registration request] In an electric actuator equipped with a clutch mechanism having a clutch case that is open at one end and houses a wound coil bobbin and that has a clutch plate disposed in the opening, the opening in the clutch case that can come into contact with the clutch plate is provided. While forming a notch in a part of the flange surface of the part,
An electric actuator characterized in that a lead wire connection portion is provided on a flange of the coil bobbin on the clutch plate side, protruding outward from the notch and having a lead wire partition wall and a grommet storage portion.