JPH0636910U - 2-axis electric actuator - Google Patents

Abstract

(57) [Summary] [Purpose] The driven shaft can be accurately assembled to the output shaft.
Axial electric actuator "is provided. [Structure] The axial surface of each gear of the first reduction gear train 33 is
The first and second output shafts 21 and 22 are arranged so as to face the axial surfaces of the respective gears of the second reduction gear train 34, and the first and second output shafts 21 and 22 are located in the vicinity of the end of the case 20 of the actuator. The two output shafts 21 and 22 and the first and second driven shafts 1 and 2 are fixed by screws 24 and 27 from the outside on different surface sides of the case 20.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a two-axis electric actuator that can accurately assemble a driven shaft to an output shaft.

[0002]

[Prior art]

 BACKGROUND ART Various doors such as intake doors, air mix doors, and air distribution doors of recent air conditioners for automobiles, or lock mechanisms for automobile doors are operated by electric actuators.

Conventionally, as such an actuator, there is a one-shaft type actuator having one output shaft (Japanese Utility Model Publication No. 2-96064 and Japanese Utility Model Publication No. 3-40856). In the case of doors, etc., two driven members may be driven very close to each other, and a two-axis actuator having two output shafts has been developed from the viewpoint of space saving (special feature). (Kaisho 60-98068).

An example of such a biaxial actuator is shown in FIGS. 3 and 4. An example of the driven side is a door of an air conditioner, which has a solid first driven shaft 1 and a cylindrical second driven shaft 2 arranged concentrically therewith. . A door (not shown) and a door 3 are integrally formed on the first driven shaft 1 and the second driven shaft 2, respectively. The first and second driven shafts 1 and 2 are coaxial with each other in correspondence with the two output shafts of the actuator, that is, the first output shaft 4 and the concentric shaft. The arranged second output shaft 5 is provided. The upper ends of the first and second output shafts 4 and 5 are formed into a cylindrical shape or a D-shaped cross section, and the lower ends of the first and second driven shafts 1 and 2 are press-fitted therein. It is fixed to each other.

As a configuration for driving the first output shaft 4, a semicircular gear 6 is integrally formed on the first output shaft 4, and the gear 6 has three gears 7, 8, 9 and a first reduction gear train composed of gears (not shown) are meshed with each other, and the gear 9 is meshed with the worm 11 of the output shaft of the motor 10. As a result, the rotation output of the motor 10 is decelerated and transmitted to the gear 6, and the first output shaft 4 is rotated and the first driven shaft 1 is driven. On the other hand, in the configuration for driving the second output shaft 5, similarly, a semicircular gear 12 is integrally formed on the second output shaft 5, and three gears 13, 14, 15 and a gear (not shown) are provided. The second reduction gear train consisting of is meshed with the gear 12, and the worm 17 of the output shaft of the motor 16 is meshed with the gear 17. As a result, when the motor 16 is driven, the second output shaft 5 is decelerated and rotated, the second driven shaft 2 is driven, and the door 3 is rotated.

[0006]

[Problems to be solved by the device]

 However, in such a conventional two-axis actuator, as shown in FIG. 4, the first and second driven shafts are respectively formed in the cylindrically-shaped portions at the upper ends of the first and second output shafts 4, 5. The lower ends of the drive shafts 1 and 2 are press-fitted and fixed. Therefore, when the first driven shaft 1 is press-fitted into the first output shaft 4, the element of the first driven shaft 1 is blocked by the second driven shaft 2 and cannot be visually inspected. It is difficult to attach.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a two-axis electric actuator capable of accurately assembling a driven shaft to an output shaft. To do.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a first output shaft and a second output shaft concentric therewith, a first driven shaft of a driven side unit and a second driven shaft concentric therewith. On the other hand, while the rotation output of the first motor is transmitted to the first output shaft via the first reduction gear train, the rotation output of the second motor is transmitted to the second output shaft. In a two-shaft electric actuator configured to be transmitted via a second reduction gear train, the first and second output shafts and the first and second driven shafts are on different surface sides of the case. It is characterized in that they are fixed to each other outside the.

[0009]

[Action]

 In the present invention configured as described above, the first and second output shafts and the first and second driven shafts are fixed to each other outside the different surface sides, so that the first When fixing the driven shaft, the second driven shaft does not obstruct the view of the driven shaft so that it cannot be visually inspected.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1A is a plan view of a two-axis electric actuator according to an embodiment of the present invention, FIG. 1B is a side sectional view thereof, and FIG. 2 is a sectional view taken along line CC of FIG. 1A. Is. The same parts as those in FIGS. 3 and 4 are designated by the same reference numerals.

The two-axis electric actuator according to the present embodiment can be applied to an electric actuator that operates various doors of an air conditioner for a vehicle or a lock mechanism of a door of a vehicle.

As shown in FIGS. 1A and 1B, this electric actuator is housed in a long case 20. The output shaft thereof, that is, the first output shaft 21 and the second output shaft 22 concentric with the first output shaft 21 are arranged near the end of the case 20. As a result, when the driven shaft of the door 3 provided at the corner of the air conditioner unit is driven, the actuator itself can be aligned with each other without protruding outside the air conditioner unit. Therefore, even in such a case, the size can be reduced.

As shown in FIG. 2, the first and second output shafts 21 and 22 are a first driven shaft 1 of a driven unit and a second driven shaft 2 which is concentric with the first driven shaft 1. It is placed coaxially with and.

The first output shaft 21 is formed of resin in a cylindrical shape, and is arranged so as to project to one surface side of the case 20, and a screw hole 23 is formed in the projecting portion. The first driven shaft 1 is fitted in the tubular first output shaft 21, and the first output shaft 21 is fixed to the first driven shaft 1 by the screw 24 inserted into the screw hole 23. There is.

The second output shaft 22 is made of resin and is slidably arranged with respect to the first output shaft 21. An upper end 25 of the second output shaft 22 projects from the case 20 to the side different from the first output shaft 21, is formed in a tubular shape, and has a screw hole 26. The second driven shaft 2 is fitted in the cylindrical upper end 25, and the second output shaft 22 is fixed to the second driven shaft 2 by the screw 27 inserted in the screw hole 26.

Since the first and second output shafts 21 and 22 and the first and second driven shafts 1 and 2 are thus fixed by the screws 24 and 27, they are fixed by press fitting as in the conventional case. It is not necessary to do so, and when fixing the first driven shaft 1, the second driven shaft 2 does not obstruct the view of the second driven shaft 2 so that the first driven shaft 1 cannot be visually observed. Further, since it is fixed by the screws 24 and 27, it is not necessary to employ a rotation stopping structure for the output shafts 21 and 22 and the driven shafts 1 and 2, and the processing man-hours therefor can be reduced. Further, since it is not fixed by press-fitting, there is less risk of breakage on the output shaft side and there is less risk of rattling. Further, by setting the screw holes 23 and 26 on the output shaft side to be large, it is possible to perform fine adjustment to absorb manufacturing variations of the actuator and the driven side unit.

As shown in FIG. 1B, the first output shaft 21 is configured to be driven by a first motor 31 via a first reduction gear train 33, and the second output shaft 22 is a second output shaft 22. It is configured to be driven by the second motor 32 via the reduction gear train 34.

The first and second reduction gear trains 33 and 34 are configured as follows. The first motor 31 has a worm 35 on its output shaft, and a large gear 37 of a double spur gear 36 is meshed with the worm 35. The small spur gear 38 of the double spur gear 36 is meshed with the large spur gear 40 of the double spur gear 39, the small gear 41 of the double spur gear 36 is meshed with the large gear 43 of the double spur gear 42, and the small gear 44 thereof is A semicircular spur gear 45, which is integrally formed with the output shaft 21, is meshed with the output shaft 21. As a result, the rotation output of the first motor 31 is decelerated by the first reduction gear train 33 and transmitted to the first output shaft 21.

The second reduction gear train 34 is also symmetrically configured similarly to the first reduction gear train 33, and is a double spur gear including a worm 46, a large gear 48 and a small gear 49 of the output shaft of the second motor. 47, a double spur gear 50 including a large gear 51 and a small gear 52, a double spur gear 53 including a large gear 54 and a small gear 55, and a semicircular spur gear integrally formed on the second output shaft 22. It consists of a gear 56. As a result, the rotation output of the second motor 32 is decelerated by the second reduction gear train 34 and transmitted to the second output shaft 22.

Further, the axial surfaces of the respective gears of the first and second reduction gear trains 33 and 34 are arranged so as to face each other, and the double spur gears 36 and 47 include the single shaft 57. The double spur gears 39 and 50 are supported by one shaft 58, and the double spur gears 42 and 53 are also supported by one shaft 59. With this configuration, as is clear from comparing FIGS. 1 (A) and (B) with FIG. 3, there is no wasted space for the gear train, and the actuator should be compact. You can

As described above, according to this embodiment, there is no wasted space for the gear train, and the actuator can be made compact. For example, when driving the driven shaft of the door provided at the corner of the air conditioner unit as the driven side, the actuator itself can be aligned with the air conditioner unit. It can be made compact.

Further, since the first and second output shafts and the first and second driven shafts are fixed on different surface sides, when fixing the first driven shaft, the second driven shaft is fixed. It can be assembled correctly because there is no obstruction and it is not possible to see it.

Further, since it is fixed by screws, it is not necessary to adopt a rotation stopping structure for the output shaft and the driven shaft, and the number of processing steps for this can be reduced. Furthermore, since it is not fixed by press fitting, there is less risk of breakage on the output shaft side and less risk of backlash. Furthermore, by setting a large screw hole on the output shaft side, it is possible to make fine adjustments to absorb manufacturing variations in the actuator and driven unit.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and can be variously modified.

[0025]

[Effect of device]

 As described above, according to the present invention, the driven shaft can be accurately assembled to the output shaft.

[Brief description of drawings]

FIG. 1A is a plan view of a biaxial electric actuator according to an embodiment of the present invention, and FIG. 1B is a side sectional view thereof.

FIG. 2 is a cross-sectional view taken along the line CC of FIG.

FIG. 3 is a plan view of a conventional biaxial electric actuator.

4 is a cross-sectional view taken along the line EE of FIG.

[Explanation of symbols]

 1 ... 1st driven shaft 2 ... 2nd driven shaft 20 ... case 21 ... 1st output shaft 22 ... 2nd output shaft 31 ... 1st motor 32 ... 2nd motor 33 ... 1st reduction gear train 34 ... 2nd Reduction gear train

Claims (1)

[Scope of utility model registration request] 1. A first output shaft (21) and a second output shaft concentric therewith.
(22) is arranged coaxially with the first driven shaft (1) of the driven side unit and the second driven shaft (2) concentric therewith, while the first output shaft (1 21), the rotation output of the first motor (31) is transmitted through the first reduction gear train (33), and the rotation output of the second motor (32) is transmitted to the second output shaft (22). 2 is adapted to be transmitted through a reduction gear train (34) 2
In the shaft type electric actuator, the first and second output shafts (21, 22) and the first and second driven shafts (1, 2) are respectively provided outside each other on different surface sides of the case (20). A two-axis electric actuator that is fixed to the.