JP2002349641A - Actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an actuator 1 capable of deciding easily to fix the distance between a motor shaft 5a and pivots 6, 7 and an output shaft 8. SOLUTION: This actuator 1 is equipped with a base 3, a motor 5 with a motor case 3a formed with the base 3 as a unit, pivots 6, 7 being juxtaposed on the same plane of the motor shaft 5a of the motor 5 and fixed on the base 3, output shaft 8 being juxtaposed on the same plane of the pivots 6, 7 and supported rotatably on the base 3, a pinion gear 14 coupled to a motor shaft 5a of the motor 5, reduction gears 17, 20, that are fitted in the pinion gear 14 and supported to enable revolution in the pivots 6, 7 and a sector gear 11 fixed to the output shaft 8 and geared with the reduction gears 17, 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator used for moving a variable nozzle vane provided in a turbocharger of a diesel engine, for example.

[0002]

2. Description of the Related Art As this type of actuator, there is known an actuator in which an output shaft is rotated through a speed reduction mechanism when a motor is operated by energization to move a nozzle vane of a turbocharger connected to the output shaft. ing.

[0003]

However, in the above-described actuator, the motor shaft of the motor, the pivot shaft of the speed reduction mechanism, and the output shaft are supported by members separately fixed to the case. There is a problem that it is difficult to determine the constant.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an actuator which can easily set a constant distance between a motor shaft, a pivot and an output shaft.

[0005]

Configuration of the Invention

[0006]

According to a first aspect of the present invention, there is provided an actuator having a base, a motor having a motor case formed integrally with the base, and a motor arranged in parallel on the same plane as a motor shaft of the motor. A shaft fixed on the base, an output shaft arranged in parallel on the same plane as the shaft and rotatably supported by the base, a pinion gear coupled to the motor shaft of the motor, and meshed with the pinion gear. And a reduction gear rotatably supported on the pivot, and a sector gear fixed to the output shaft and meshed with the reduction gear.

The actuator according to a second aspect of the present invention is characterized in that the output shaft is arranged in parallel on the same plane as the pivot shaft and the motor shaft, and the output shaft is rotatably supported by the base. .

In the actuator according to a third aspect of the present invention, the first and second pivots are arranged in parallel on the same plane as the motor shaft of the motor and fixed on the base, respectively. Arranged in parallel on the same plane as the axis,
An output shaft rotatably supported by the base, a first gear meshed with the pinion gear, a second gear coupled to the first gear, and rotatably supported by the first pivot; A first intermediate gear, a third gear meshed with the second gear, a fourth gear connected to the third gear, and rotatably supported by a second pivot. And a second intermediate gear, and a sector gear coupled to the output shaft and meshed with the fourth gear.

In the actuator according to a fourth aspect of the present invention, the output shaft, which is arranged in parallel on the same plane as the first and second pivots and the motor shaft, is rotatably supported by the base, and the second gear. And a third intermediate gear that has a fourth gear and is rotatably supported by a second pivot, between the third gear and the fourth gear. And a damper member arranged to transmit rotation of the third gear to the fourth gear.

According to a fifth aspect of the present invention, in addition to the structure of the first, second, third, or fourth aspect, a coil spring is disposed so as to surround the output shaft and constantly biases the output shaft in one rotational direction. It is characterized by having the structure provided with.

[0011]

In the actuator according to the present invention, the pivots are arranged in parallel on the same plane as the motor shaft of the motor and fixed on the base, and the output shafts are arranged in parallel on the same plane as the pivots. It is rotatably supported by the base. Therefore, the distance between the motor shaft, the pivot shaft, and the output shaft is fixed by the base.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

[0013]

1 to 10 show an embodiment of an actuator according to the present invention.

The illustrated actuator 1 mainly includes
Lower case 2, base 3, upper case 4, motor shaft 5
brushless motor having a (hereinafter referred to as motor)
5, first pivot 6, second pivot 7, output shaft 8, reduction mechanism 9, damper member 10, sector gear 11, return spring 12,
It is composed of a swing arm 13. Reduction mechanism 9
A first intermediate gear 17 having a pinion gear 14, first and second gears 15 and 16, third and fourth gears 18 and 19,
And a second intermediate gear 20 having

The open end of the lower case 2 is connected to the open end of the upper case 4. A first pivot support 4a1, a second pivot support 4a2, and an output shaft support 4a3 are formed on the top plate 4a of the upper case 4. The tip of the first pivot 6 is inserted and supported by the first pivot support 4a1. The tip of the second pivot 7 is inserted and supported by the second pivot support 4a2. The output shaft support 4a3 is formed in a cylindrical shape, and a first bearing 21 is attached to an inner peripheral portion of the output shaft support 4a3.

The base 3 is sandwiched and fixed between the lower case 2 and the upper case 4. The base 3 includes a motor case 3a, a first pivot support 3b,
, And an output shaft support 3d. The motor case portion 3a has a cylindrical shape with the lower case 2 side opened. A bearing support hole 3a2 is formed in the center of the top plate 3a1 of the motor case 3a. The inner race of the third bearing 22 is fixed to one end of the motor shaft 5a. The outer ring of the third bearing 22 is inserted and supported in the bearing support hole 3a2. The base end of the first pivot 6 is inserted and supported by the first pivot support 3b. The base end of the second pivot 7 is inserted and supported by the second pivot support 3c. A second bearing 23 is attached to the output shaft support 3d. The base 3 includes a bearing support hole 3a2 of the motor case portion 3a and a first pivot support portion 3b.
, The second pivot support 3c, and the output shaft support 3d, the centers of which are aligned, so that the motor shaft 5a, the first pivot 6, the second pivot 7, the output shaft 8 has a function of determining a constant distance between the axes.

A motor case 3a of the base 3 contains a stator 5b, a rotor 5c having a motor shaft 5a, and a holder base 5d. The motor 5 includes a motor case 3
a, a stator 5b, a rotor 5c having a motor shaft 5a, and a holder base 5d. The inner race of the fourth bearing 25 is fixed to the other end of the motor shaft 5a. The outer ring of the fourth bearing 25 is connected to the bearing support hole 5 of the end cap 5e.
Inserted and supported by e1. The circuit board 26 is screwed to the back surface of the base 3 with screws 28 as shown in FIG. Stator 5b is electrically connected to an engine control unit through a control circuit on circuit board 26. When a drive signal is given from the engine control unit, an exciting current is supplied from the control circuit to the stator 5b, and the rotor 5c rotates. Motor shaft 5a
, A pinion gear 14 is fixed. Motor 5
Is a brushless motor, so that it is not affected by abrasion of a brush and the like and does not hinder long-term use unlike a commutator motor.

A pivot hole 17a formed at the center of the first intermediate gear 17 is rotatably inserted into and supported by the first pivot 6. The first intermediate gear 17 is a first gear 1
5, the second gear 16. The first gear 15 and the second gear 16 are integrally connected. First gear 15
Are meshed with the pinion gear 14. Second gear 1
6 is meshed with the third gear 18 of the second intermediate gear 20.

A second intermediate gear 20 is inserted through the second pivot 7. The second intermediate gear 20 is the third gear 1
8, a fourth gear 19. The third gear 18 and the fourth gear 19 are formed independently. Third gear 18
Are meshed with the second gear 16. The fourth gear 19 is meshed with the sector gear 11. At the center of the third gear 18, a fourth gear engaging portion 18a formed into a round hole is formed. As shown in FIG. 9, damper member accommodating portions 18c, 18c, 18c divided into three parts by partition plates 18b, 18b, 18b are formed on the back surface of the third gear 18, respectively. Damper member accommodating portions 18c, 18
The damper members 10, 10, 10 are accommodated in c, 18c, respectively. The damper member 10 has end portions 10a, 1
0a is the partition plate 18 arranged at the end of the damper accommodating portion 18c.
b, 18b. At the center of the damper member 10, a notched engaging portion 10b is formed. The fourth gear 19 has a disk portion 19a and a third gear engagement portion 19b. As shown in FIG. 8, three damper member fixing protrusions 19a are provided on the disc portion 19a.
1, 19a1 and 19a1 are formed to protrude. The damper member fixing projection 19a1 is
b. The third gear engaging portion 19b is formed with three engaging tongue pieces 19b1, 19b1, and 19b1, respectively. The third gear engaging portion 19b is provided for the third gear 1
8 is inserted into the fourth gear engaging portion 18a and the engaging tongue 1
9b1 is engaged with the stepped portion 18a1 of the fourth gear engaging portion 18a, so that the fourth gear 19 is
To be rotatable. Third gear engaging portion 19
A pivot hole 19b2, which is rotatably inserted into and supported by the second pivot 7, is formed in the center of b. Damper member 1
Reference numeral 0 denotes an engagement portion 1 while the end portions 10a, 10a are respectively locked by the partition plates 18b, 18b of the damper accommodating portion 18c.
0b is fixed to the damper member fixing projection 19a1 of the fourth gear 19, so that the sector gear 1
It has a function of elastically deforming when a large impact is applied from 1 to absorb the impact and not transmitting a large impact force to the third gear 18.

The output shaft 8 is disposed in the output shaft support 4a3 of the upper case 4.
And a second bearing 23 fixed to the output shaft support 3d of the base 3 so as to be rotatable. A sector gear 11 is connected to the outside of the output shaft 8. A return spring 1 is attached to an end of the output shaft 8 protruding from the output shaft support 4a3 of the upper case 4.
The base end of the swing arm 13 is fixed by screwing the nut 29 through the joint 2. One end 12b of the return spring 12 is connected to a spring engaging portion 4a4 formed on the upper case 4.
It is locked to. The other end 12 a of the return spring 12 is locked to the swing arm 13. An insulator 30 for preventing the return spring 12 from directly contacting the output shaft support 4a3 of the upper case 4 is attached to an inner peripheral portion of the return spring 12. A tip end of the swing arm 13 is connected to a linkage arm 32 of a nozzle vane via a rod 31 shown in FIG.

Actuator 1 having such a structure
In the vehicle, the upper case 4 is fixed by screws near the turbocharger of the diesel engine, the control circuit is connected to the engine control unit, and the tip of the swing arm 13 is connected to the linkage arm 32 of the nozzle vane via the rod 31. Will be mounted on the engine.
When the exhaust gas of the engine is applied to the turbine blades of the turbocharger in an optimal direction and speed according to the running conditions of the vehicle, a drive signal is given from the engine control unit to the control circuit, and the exciting current is supplied to the stator 5b. The rotor 5c is rotated by the supply, the first intermediate gear 17 is rotated by the rotation of the pinion gear 14,
In the second intermediate gear 20, rotational power is transmitted from the third gear 18 to the fourth gear 19 via the damper member 10, and the sector gear 11 and the output shaft 8 are rotated. The position of the nozzle vane 33 shown in FIG. 10 is changed by rotating the linkage arm 32 from the position C to the position D, as shown in FIG. When the angle of the nozzle vane 33 is changed, the impact at the time when the nozzle vane 33 strikes the case or the stopper at the stroke end is transmitted to the swing arm 13, the output shaft 8, the sector gear 11, and the fourth gear 19. Absorbed third gear 1
8 is not transmitted.

[0022]

As described above, according to the actuator according to the present invention, the pivots are arranged in parallel on the same plane as the motor shaft of the motor and fixed on the base.
The output shaft is arranged in parallel on the same plane as the pivot, and is rotatably supported by the base. Therefore, the distance between the motor shaft, the pivot shaft, and the output shaft is fixed by the base. Therefore, there is an excellent effect that the distance between the motor shaft, the pivot, and the output shaft can be easily fixed.

[Brief description of the drawings]

FIG. 1 is a partially broken external perspective view illustrating an internal structure of an embodiment of an actuator according to the present invention.

FIG. 2 is a bottom view for explaining the movement of a swing arm in the actuator shown in FIG.

FIG. 3 is a front view of the actuator shown in FIG. 1;

FIG. 4 is a longitudinal sectional view of the actuator shown in FIG.

FIG. 5 is an external perspective view for explaining assembly of a base and a speed reduction mechanism in the actuator shown in FIG. 1;

FIG. 6 is a bottom view of a base in the actuator shown in FIG. 1;

FIG. 7 is a plan view of an end cap in the actuator shown in FIG. 1;

8 is an exploded perspective view of a second intermediate gear in the actuator shown in FIG.

FIG. 9 is an external perspective view for explaining assembly of a third gear and a damper member in the actuator shown in FIG. 1;

FIG. 10 is a schematic diagram of a turbocharger section using the actuator shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Actuator 3 Base 3a (motor case) Motor case part 5 Motor 5a Motor shaft 6 (axis) 1st axis 7 (axis) 2nd axis 8 Output shaft 11 Sector gear 12 (coil spring) return spring 14 Pinion gear 15th 1st gear 16 2nd gear 17 (reduction gear) 1st intermediate gear 18 3rd gear 19 4th gear 20 (reduction gear) 2nd intermediate gear

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Yasutaka Saito 1760 Higashimatano-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term (reference) 3G005 DA02 EA04 EA16 FA46 GA04 GC08 3J009 DA13 DA17 EA05 EA11 EA21 EA32 EB24 EC06 FA14

Claims (5)

[Claims] A motor having a motor case integrally formed with the base; and a motor arranged in parallel on a same plane as a motor shaft of the motor.
A pivot fixed on the base; an output shaft arranged in parallel on the same plane as the pivot and rotatably supported by the base; a pinion gear coupled to a motor shaft of the motor; and the pinion An actuator, comprising: a reduction gear meshed with a gear and rotatably supported by the pivot; and a sector gear fixed to the output shaft and meshed with the reduction gear. 2. A motor having a base, a motor case formed integrally with the base, and arranged in parallel on the same plane as a motor shaft of the motor,
A pivot fixed on the base, an output shaft arranged in parallel on the same plane as the pivot and the motor shaft, rotatably supported by the base, and a pinion gear coupled to the motor shaft of the motor; An actuator, comprising: a reduction gear meshed with the pinion gear and rotatably supported by the pivot; and a sector gear fixed to the output shaft and meshed with the reduction gear. 3. A motor having a base, a motor case formed integrally with the base, and arranged in parallel on the same plane as a motor shaft of the motor,
First and second pivots respectively fixed on the base, and arranged in parallel on the same plane as the first and second pivots;
An output shaft rotatably supported by the base; a pinion gear coupled to a motor shaft of the motor; and a first gear meshed with the pinion gear, and coupled to the first gear. A first intermediate gear rotatably supported on the first pivot, having a second gear; and a third gear meshed with the second gear, and coupled to the third gear. A second intermediate gear rotatably supported by the second pivot, and a sector gear coupled to the output shaft and meshed with the fourth gear. An actuator, characterized in that: 4. A motor having a base, a motor case formed integrally with the base, and arranged in parallel on the same plane as a motor shaft of the motor,
First and second pivots fixed on the base, respectively; and an output shaft arranged in parallel on the same plane as the first and second pivots and the motor shaft, and rotatably supported by the base. A first pinion gear coupled to a motor shaft of the motor, a first gear engaged with the pinion gear, and a second gear coupled to the first gear; A first intermediate gear rotatably supported on the second gear, a third gear meshed with the second gear, a fourth gear, and rotatably supported on the second pivot. A second intermediate gear; a sector gear coupled to the output shaft and meshed with the fourth gear; and a sector gear disposed between the third gear and the fourth gear. A damper member for transmitting rotation to the fourth gear. Actuator characterized and. 5. The apparatus according to claim 1, further comprising: a coil spring disposed to surround the output shaft and constantly biasing the output shaft in one rotation direction. An actuator as described.