JPS59167314A - Damper driving apparatus - Google Patents

Abstract

PURPOSE:To obtain a small-sized and lightweight damper driving apparatus by selectively connecting a driving source onto a plurality of output shafts through a reduction gear and allowing the revolution of an output shaft to be locked at a fixed position, in the damper driving apparatus for a car air conditioner. CONSTITUTION:A revolution shaft 23 is revolved by a driving motor 16 through the first worm 17 and a worm wheel 18. A switching lever 39 is engaged with the outer-peripheral notched part 38a of an external sun gear 27 by the conduction of a solenoid 40, and the revolution of the third worm 20 is suppressed. The revolution of the shaft 23 turns a mix damper 1 at a necessary position through an intenal sun gear 24, planetary gears 28 and 29, second worm gear 19, second worm wheel 21, lever 44, link 49, and a lever 50. When the conduction of solenoid 40 is suspended, the lever 39 is engaged with the notched part 38b of the worm 19, and the revolution is suppressed, and mode dampers 3-5 are turned at the respective positions by the shaft 23. Therefore, operation is performed by only one driving source, and the apparatus can be made lightweight and small- sized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a drive device for an air volume and wind direction control plate (hereinafter referred to as a damper) used in a car heater unit constituting a car air conditioner. - Yes.

Conventional structure and its problems Traditionally, the damper used in car heater units was
As shown in the figure, it consists of a mix damper 1 that adjusts the temperature by the mixing ratio of cold air and warm air, and a mode damper 2.3°4.5 that sets the air intake and blowout style. 1
Since the mix damper adjusts the mixing ratio of the cold air from the cooler 7 and the warm air from the heater core 8, it is necessary to set an arbitrary position. 2, 3, and 4.5 mode dampers require stepwise position setting according to the number of settings for suction and blowout modes. Normally, the opening/closing drive of these dampers is ld2', 3, 4.5 each damper by lever
They are connected by a link mechanism and opened and closed by manual lever operation via wires, etc. However, in such manual operation, temperature adjustment and setting of suction and blowout modes are automatically performed.

It is not compatible with car automatic air conditioners, which provide more advanced comfort. Therefore, an actuator is required to automatically open and close each damper.

Conventionally, as damper drive actuators for this auto air conditioner, the mix damper 1 uses a diaphragm type servo actuator 9 that uses negative pressure air, and the mode dampers 1.3 and 4.5 use a diaphragm type servo actuator that also uses negative pressure. It was customary to install an actuator 10, 11, 12, 13 corresponding to each drive shaft.

However, in the configuration described in item 2, a considerable number of negative pressure actuators are required depending on the drive shaft, and therefore a large installation and drive space is required.

When the weight of the piping system such as the solenoid valve 14 that controls the negative pressure actuator and the vacuum tank 15 is included, the weight is considerable and becomes a factor that hinders the reduction in weight and size of the vehicle.

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, the present invention provides a damper drive device in which each mix 1 mode damper drive device is made smaller and lighter.

Structure of the Invention The present invention has a driving motor, a first worm supported by a motor shaft, a second worm, a second worm, and a third worm on axes orthogonal to the motor shaft. The third worm has a forward/reverse rotation switching mechanism using a planetary gear mechanism at an intermediate position, and is further provided with a lever for switching and a solenoid for driving the lever in the circumferential direction of the planetary gear. The second worm contacts the third worm as a pair. It is configured so that the third worm wheel and the central axis of the third worm wheel serve as the output shaft, and one motor drives multiple damper shafts, making it compact.

It has the effect of being lightweight.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to one drawing.

FIG. 2 shows a plan cross section of the damper drive device in the first embodiment of the present invention. In FIG. 3, 16 is a drive motor, 17 is a first worm supported on the motor shaft, 18 is a first worm wheel that comes into contact with the first worm, 19 is a second worm, and 20 is a third worm, each of which has 21
．． The second and third worm wheels of 22 come into contact with each other. 23
The rotation shaft of the worm wheel 18 and the second worm 19 is connected to the inner sun gear 24. 25.26 is 1
The second worm 9 is supported by a bearing on the rotating shaft 23 so that it can rotate in the radial direction but not move in the axial direction. One end of the third worm 20 is provided with 27 external sun gears constituting a planetary gear mechanism, 28.2
It meshes with the planetary gear number 9. 3o is the bearing of the shaft 23, 3
1 is a bearing of the second worm 19 and is held within a lip 33 protruding from the housing 32. Same (34,3
5 is a bearing of the third worm. 36 is also a bearing and 3
It receives the thrust load of the middle pole of No.7. As shown in FIG. 3, planetary gears 28 and 29 are attached to the second worm end piece 19, and a notch 39 is provided on the outer periphery of the end face. A notch 38 is also provided on the outer circumference of one end 27 of the third worm 20. Reference numeral 39 denotes a rotation switching lever which enters either the notch 38 or 39 to stop the rotation of the outer sun gear 2 of the planetary gear mechanism and the second worm supporting the planet gear. 40 (a solenoid that drives the d-nilever 39). 57 is a spring for returning the solenoid.

Reference numerals 41 and 42 are output shafts that drive the link mechanism with the rotation shafts of the second and third worm wheels. FIG. 5 is a schematic cross-sectional view of the device. 43 is an upper housing that engages with the housing 32.

44.45 is a lever that engages with the output shaft 42.41.
The lever is connected to a link 49 and a lever 50 to drive the mix damper 1. 46 lever is link 46,6
1.54 and lever 47° 48.62, 53.55 to drive the mode damper 3.4.5. Reference numeral 56 is a heater unit that incorporates each damper.

The operation of the damper drive device constructed as described above will be explained below.

First, in FIG. 2, when the motor 16 and the solenoid 40 are energized, the first worm rotates the shaft 23 which is integrated with the first worm wheel.

When the solenoid 40 is energized, the lever 39 enters the outer peripheral notch 38 of the outer sun gear 27 and stops the rotation of the worm 20. The rotation of the front 23 rotates the inner sun gear 24 fixed on the shaft, and further rotates the worm 19 via the planetary gears 28 and 29. By this action, the second worm wheel 21
rotates, the lever 44 locked to the output shaft 42 rotates, and the link 49. The mix damper 1 rotates via the lever 50.

Next, when the energization of solenoid 40 is cut off, Leno (-39
enters the notch 39 of the second worm 419 and stops the rotation of the worm 19. This rotation rotates the outer sun gear 27 via the planetary gears 28 and 29, and the third worm 20 integrated therewith rotates, and the lever 46 locked to the output shaft 41 rotates, causing the links 46 and 51 to rotate. °64 and lever 47.48.
52, 53, and 56 rotate the mode damper 3.4.5.

With the above operation, the rotation of the output shaft 41°42 can be selected by one motor by turning the solenoid 40 ON-OFF. Can be set to . This allows the drive device to be made smaller.

It becomes possible to reduce the weight, and the practical effects of this are significant.

Effects of the Invention According to the present invention, a plurality of damper shafts can be driven by one motor, and it is compact.

This has the effect of reducing weight.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram of a damper drive device using a conventional negative pressure actuator, FIG. 2 is a cross-sectional plan view of a damper drive device according to an embodiment of the present invention, and FIGS. 3 and 4 each show a third worm. A plan view of the second worm, FIG. 5 is a cross-sectional view of a damper driving device according to an embodiment of the present invention, and FIG. 6 is a schematic diagram showing the structure of the device when it is attached to a heater unit. 16... Drive motor, 17... First
Worm, 18...First worm wheel, 23
... Rotating axis, 19 ... Second worm,
20...Third worm, 21...Second worm wheel, 22...Third worm wheel, 28.29...Planetary gear, 39...・・・
Switching lever, 40...Solenoid. Fig. 1 5 Fig. 2 Fig. 3 @ 4 Fig. 38 Fig. 6 5 et al. Procedural amendments Mr. Commissioner of the Patent Office 1 Case Display Showa! 8th year patent application No. 40217 2 Name of the invention Damper drive device 3 Relationship with the person making the amendment case Patent application
Appointment Address: 1006 Kadoma, Kadoma City, Osaka Prefecture
(582) Matsushita Electric Industrial Co., Ltd. Representative Toshihiko Yamashita 4 Agent 571 Address 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Specification 1, Name of invention Damper drive device 2, Patent Claim 3: Detailed Description of the Invention Field of Industrial Application The present invention relates to a drive device for an air volume and wind direction control plate (hereinafter referred to as a damper) used in a car heater constituting a car air conditioner. Conventional configuration and its problems 2B- As shown in Figure 1, the damper used in conventional car heaters consists of a mix damper 1 that adjusts the temperature by adjusting the mixing ratio of cold air and warm air, and an air intake damper 1. It consists of a mode damper 2゜3.4.5 that sets the blowout style. The mix damper 1 needs to be set at an arbitrary position in order to adjust the mixing ratio of the cold air blown from the cooler evaporator 7 and the warm air blown from the heater core 8. Mode dampers 2.3 and 4.5 require stepwise position setting according to the number of settings for suction and blowout modes. Normally, these dampers are opened and closed by connecting the 2, 3, and 4.5 mode dampers with a lever link mechanism, and manually operating a lever via a wire or the like. However, such manual operation cannot support car automatic air conditioners, which provide a higher level of comfort and automatically adjust the temperature and set the intake and blowout modes. Therefore, an actuator is required to automatically open and close each damper. Conventionally, as an actuator for driving a damper for this auto air conditioner, a diaphragm type servo actuator 9 that uses negative pressure air for the mix damper 1 has been used. In the mode damper 2.3.4.5, it was customary to install diaphragm actuators 10, 11, 12, 13, which also utilize negative pressure, corresponding to each drive shaft. Alternatively, mix damper 1 and mode dampers 2 and 3
A method has been used in which a motor actuator (not shown) with a built-in speed reduction mechanism is individually installed corresponding to each drive shaft of 4.6°. However, in the above-mentioned configuration, a considerable number of actuators are required depending on the damper drive shaft, and therefore a considerable amount of space and drive space are required for installation. In addition, in the case of a negative pressure type, piping systems such as a solenoid valve 14 and a vacuum tank 15 are required to control the negative pressure actuator, and when these are included, the weight becomes considerable, which is a factor that hinders the reduction in weight and size of cars. was. Purpose of the Invention 4/''-2゛In view of the above drawbacks, the present invention provides a damper drive device in which the drive device for each mixed mode damper is made smaller and lighter. A drive source consisting of an electric motor, etc., multiple output shafts, a reduction gear mechanism that transmits the driving force to the output shaft, an output shaft switching mechanism that selects the output of the output shaft, and a lock mechanism that stops the rotation of the output shaft in a fixed position. a drive actuator having a plurality of mode dampers and one of the output shafts of the drive device;
It consists of a lever link mechanism that connects the mix damper and the other one of the output shafts, and a single drive source can open and close multiple dampers, significantly reducing the number of parts. reduction can be achieved. Furthermore, since the overall structure is simple, it has the advantage of being smaller and lighter. DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows a planar cross section of the drive actuator in the first embodiment of the present invention. In FIG. 2, 16 is a drive motor which is a drive source, 17 is a first worm integrated with the motor shaft, and 18 is a first worm wheel that comes into contact with the first worm. Reference numeral 19 denotes a second worm, and 20 a third worm coaxial with the second worm, which are in contact with the second and third worm wheels 21 and 22, respectively. 23 is integrally engaged with the first worm wheel 18 and is a rotation axis of the second worm 19. Further, the rotating shaft 23 is integrally engaged with an inner sun gear 24. 25 and 26 are the bearings of the second worm of 19.
It is supported on the rotating main shaft of No. 3 so that it can rotate in the radial direction but not move in the axial direction. The first worm wheel 18 and the inner sun gear 24 are integrally connected to the rotating main shaft 23. One end of the third worm 20 is provided with a 27 external sun gear constituting an output shaft switching mechanism, which meshes with 28 and 29 planetary gears. Above 1st and 2nd. A deceleration transmission mechanism is constituted by the third worm, the worm wheel, and the planetary gear device 24, 27, 28, and 29. Furthermore, 30 is a bearing of the shaft 23, and 31 is a bearing of the second worm 19, which are held within a rib 33 integrated with the housing 32. Similarly, white 4 and 35 are the bearings of the third worm. Similarly, 36 is a bearing which receives an axial thrust load transmitted from an intermediate ball 37. As shown in FIG. 3, planetary gears 28 and 29 are attached to the end face of the second worm 19, and a plurality of concave notches 38a are provided on the outer periphery of the end face. Further, as shown in FIG. 4, a concave notch 38b is provided on the outer periphery of the end surface 27 of the 20 third worms in correspondence with the 38a. Reference numeral 39 is an output shaft switching lever that is inserted into one of a concave notch 38a on the outer periphery of the end face of the second worm supporting the planetary gear of the planetary gear device and a concave notch 38b provided on the outer periphery of the end face of the outer sun tooth surface 27. , stop its rotation. 40 is a solenoid that drives the switching lever 39. The worm whose rotation is not stopped by the switching lever 39 is rotated by the driving force transmitted from the inner sun gear 24. 6
7 is a spring for returning the solenoid. 41°42 is the second
and the rotation axis of the third worm wheel, the link mechanism is
This is the output shaft for driving. The second shaft integrated with the output shaft 42.41. The third worm wheel 21.22 is connected to the second worm wheel 21.22. The third worms 19 and 20 are engaged, and by setting the worm angle to about 5 points below, even if a rotational load is applied from the output shaft, the automatic locking action works and the levers 44 and 45 are held at the specified position. Since it remains in position and does not reverse, a locking mechanism is formed. FIG. 5 is a schematic cross-sectional view of the drive actuator constructed as described above. 43 is an upper housing that engages with the housing 32. 44° 45 shown in FIG. 6 is the output shaft 42.
The lever 44 is connected to the link 49 and the lever 6o, and rotates the mix damper 1. Lever 45 is connected to links 46, 51 . 54 and levers 47, 48° 52, 53, 55 to rotate the mode damper 3° 4.5 while maintaining a predetermined positional relationship. The above constitutes a lever link mechanism that connects the drive actuator having a plurality of exit shafts, the mix damper, and the mode damper 81°. Reference numeral 56 denotes a car heater main body in which each damper is built-in. The following describes the damper drive device configured as described above.
Let's explain its operation. First, the drive of mix damper 1 will be described. Second
In the figure, when the drive motor 16 and solenoid 40 are energized, the first worm 17 rotates the rotating shaft 23 that is integrally engaged with the first worm wheel 18 . When the solenoid 4o is energized, the switching lever 39 enters the outer peripheral notch 38a of the outer sun gear 27 and stops the rotation of the third worm 20. The rotation of the shaft 23 causes the inner sun gear 24 coaxially and integrally engaged to rotate, and further rotates the second worm 19 via the planetary gears 28 and 29. As a result, the second worm wheel 21 rotates, the lever 44 locked to the output shaft 42 rotates, and the mix damper 1 is rotated to a required position via the link 49 and lever 50. Next, the driving of mode damper 3.4.5 will be described. When the solenoid 40 is energized and disconnected, the switching lever 39 enters the end surface notch 38b of the second worm 19 and switches to the second worm.
The rotation of the worm 19 is stopped. As a result, planetary gear 2
The outer sun gear 27 rotates via 8.29, the third worm 2o integrated with the worm 27 rotates, the lever 46 locked to the output shaft 41 rotates, and the links 46, 51, 54 and Rotate the mode damper 3.4.5 to the set position via the lever 47.48.52.53.55. By the above operation, one drive motor controls the rotation of the output shaft 41, 42 of the drive actuator by the 0N- of the solenoid 40.
It can be selected as OFF. This drive actuator and the link lever mechanism connected to each damper allow mix damper 1 and mode.
The damper 2.3.4 can be rotated into any required position. In addition to the effects of the invention, the present invention has a simpler overall configuration, smaller size, and lighter weight than conventional drive devices for car auto air conditioners, and the number of parts can be significantly reduced by 10/. Its practical effect is a dog. 4. Brief explanation of the drawings Fig. 1 is a system configuration diagram of a conventional damper drive device using a negative pressure actuator, Fig. 2 is a plan view of the system, and Fig. 5 is a cross-sectional view of the drive actuator. It is a front view of the damper drive device in one example. 16... Drive motor, 41.42...
Output shaft, 17...First worm, 18...
...First worm wheel, 19...Second worm, 24...Inner sun gear, 20...
Third worm, 21... Second worm wheel, 22... Third worm wheel, 23...
...rotating shaft, 27...outer sun gear, 28.29
...Planetary gear, 39...Switching lever, 4o...Solenoid, 44,49.50...
...Mix O damper connection lever, link, 4
5,46°47.48.51.52.53.54.55
・・・・・・Lever and link for connecting mode and damper. Figure 3 Figure 4 83-

Claims (1)

[Claims] a driving motor, a first worm supported on a motor shaft of the motor, a first worm wheel, a second worm, and a third worm provided on a shaft orthogonal to the motor shaft; a planetary gear mechanism disposed at an intermediate position connecting the third worm gear; a normal/reverse switching lever and a lever drive solenoid disposed on the outer circumferential direction of the planetary gear mechanism; The second worm is in contact with the third worm, respectively. Consists of a third worm wheel,
This second. A damper drive device having the shaft of the third worm wheel as an output shaft.