JP2005076695A - Equipment driver and air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize the whole conformation of the equipment driver such as a door for an air conditioner. <P>SOLUTION: A rotation shaft 12 of the door 10 for the air conditioner is made cylindrical, a drive shaft 14 is rotatably arranged inside the cylindrical rotation shaft 12, and one end of the drive shaft 14 is protruded outside the cylindrical rotation shaft 12 to connect a motor 15. Inside the cylindrical rotation shaft 12, a female screw member 16 engaging with a male screw of the drive shaft 14 is movably arranged in the axial direction. A drive pin 16a incorporated with the female screw member 16 is inserted to penetrate into a shaft drive groove 17 of the cylindrical rotation shaft 12. A rotation preventing means to prevent the rotation of the female screw member 16 by engaging with the top end of the drive pin 16a is provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a drive device for equipment such as an air-conditioning door and an air-conditioning device using the same, and is suitable for use in, for example, a vehicle air-conditioning device.

  2. Description of the Related Art Conventionally, a door that opens and closes an air passage in a vehicle air conditioner is usually driven by a drive device that uses a motor as a drive source. FIG. 7 shows a typical example of such a conventional technique. A reduction mechanism is built in the motor 15, and the rotation output after deceleration by this reduction mechanism is output to the door 10 via the link mechanism 30 having links 30a and 30b. The rotary door 12 is configured to rotate the flat door body 11 of the door 10.

  According to the above prior art, the built-in speed reduction mechanism increases the size of the motor 15 and the link mechanism 30 is interposed between the motor 15 and the rotary shaft 12 of the door 10. The size of the entire door drive device including the size increases. As a result, it becomes difficult to secure a vehicle mounting space for the air conditioner.

  An object of this invention is to reduce the size of the whole apparatus drive devices, such as an air-conditioning door, in view of the said point.

In order to achieve the above object, in the invention described in claim 1, a cylindrical rotating shaft (12, 21) for driving a device to be driven,
A drive shaft (14) disposed rotatably inside the cylindrical rotation shaft (12, 21), one end projecting to the outside of the cylindrical rotation shaft (12, 21) and forming an external thread on the outer peripheral surface; ,
A motor (15) coupled to the one end of the drive shaft (14) outside the cylindrical rotary shaft (12, 21) and rotating the drive shaft (14);
It arrange | positions so that it may mesh with the external thread of the said drive shaft (14) inside the said cylindrical rotating shaft (12, 21), and it can move to the axial direction of the said cylindrical rotating shaft (12, 21). A female screw member (16);
The cylindrical rotation shaft (12, 21) is formed so as to penetrate the wall surface of the cylindrical rotation shaft (12, 21) and extend in the axial direction of the cylindrical rotation shaft (12, 21), and the axis of the cylindrical rotation shaft (12, 21). An axial drive groove (17) having diagonal areas (17b, 17c) intersecting the direction;
A drive pin (16a) provided integrally with the female screw member (16), inserted into the shaft drive groove (17) and having a tip projecting outside the shaft drive groove (17);
Rotation prevention means (18) for engaging with the tip of the drive pin (16a) and preventing rotation of the female screw member (16) is provided.

  According to this, when the drive shaft (14) is rotated by the motor (15), the rotation of the female screw member (16) is blocked by the rotation blocking means (18), so that the male screw and female screw member (16) of the drive shaft (14) are blocked. ), The female screw member (16) moves in the axial direction of the cylindrical rotary shaft (12, 21).

  Then, the drive pin (16a) integrated with the female screw member (16) moves in the axial direction in the oblique section (17b, 17c) of the shaft drive groove (17) of the cylindrical rotary shaft (12, 21) to form a cylinder. A force in the rotational direction can be applied to the cylindrical rotating shaft (12, 21), and the cylindrical rotating shaft (12, 21) can be rotated.

  Here, the rotation mechanism of the drive shaft (14) can be decelerated and converted into the amount of axial movement of the female screw member (16) by the screw meshing mechanism of the male screw and female screw member (16) of the drive shaft (14). Can be configured inside the cylindrical rotary shaft (12, 21). Therefore, it is not necessary to incorporate a speed reduction mechanism in the motor (15) as in the prior art, and the motor (15) can be reduced in size.

  Moreover, since the drive shaft (14) in which the male screw is formed may be disposed concentrically inside the cylindrical rotation shaft (12, 21), the outer diameter of the cylindrical rotation shaft (12, 21) is also normal. You only need to make it a little larger than a non-hollow shaft.

  Furthermore, since the cylindrical rotating shaft (12, 21) is rotated by the engagement between the drive pin (16a) and the shaft drive groove (17) accompanying the axial movement of the female screw member (16), the link mechanism ( The mechanism corresponding to 30) can also be configured in the cylindrical rotating shaft (12, 21). Therefore, the link mechanism (30) can be eliminated.

  As described above, the downsizing of the motor (15) and the abolition of the link mechanism (30) can be combined to effectively reduce the size of the entire device driving apparatus.

  According to a second aspect of the present invention, in the apparatus driving device according to the first aspect, the shaft drive groove (17) is a parallel section (17a, parallel to the axial direction of the cylindrical rotation shaft (12, 21)). 17d, 17e).

  According to this, when the driving pin (16a) is located in the parallel section (17a, 17d, 17e), the driving pin (16a) moves in the axial direction along the shape of the parallel section (17a, 17d, 17e). Even if the drive pin (16a) moves in the axial direction, the cylindrical rotation shafts (12, 21) do not rotate. Therefore, by providing the parallel sections (17a, 17d, 17e) in the shaft drive groove (17), the device to be driven can be reliably stopped at a predetermined position even if the stop position accuracy of the motor (15) is low.

In invention of Claim 3, the apparatus drive device of Claim 1 or 2 is provided,
The device to be driven is an air conditioning door (10, 20, 26, 28). The air conditioning door (10, 20, 26, 28) is disposed in an air conditioning case (13), and the air conditioning case ( 13) It is characterized by an air conditioner adapted to open and close the air passages (24, 25).

  According to this, in the air conditioner which opens and closes the air passages (24, 25) of the air conditioning case (13) by the air conditioning doors (10, 20, 26, 28), the effects of claims 1 and 2 can be exhibited.

  According to a fourth aspect of the present invention, in the air conditioner according to the third aspect, the rotation preventing means is formed in the air conditioning case (13) so as to extend in the axial direction of the cylindrical rotation shaft (12, 21). The drive pin (16a) is a pin receiving groove (18) into which the tip end portion is inserted.

  According to this, using the pin receiving groove (18) formed integrally with the air conditioning case (13), the rotation prevention function of the female screw member (16) can be exhibited with a simple configuration.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
1 to 3 show a first embodiment. In the first embodiment, the present invention is applied to a drive device for a door 10 that opens and closes an air passage in a vehicle air conditioner.

  The door 10 is configured by integrally forming a cylindrical rotating shaft 12 at one end of a flat door main body 11. Here, the door main body 11 and the rotating shaft 12 can be integrally formed of resin. The door 10 is housed in a resin air conditioning case 13 so as to be rotatable.

  More specifically, one end portion (the upper end portion in FIG. 1A and FIG. 2A) in the axial direction of the rotary shaft 12 of the door 10 is a bearing hole formed in one inner wall surface of the air conditioning case 13. 13a is rotatably fitted and supported. Further, the other axial end portion (the lower end portion of FIG. 1A) of the rotating shaft 12 is rotatably fitted and supported in a bearing recess 13 b formed on the other inner wall surface of the air conditioning case 13.

  The door 10 opens and closes an air passage formed in the air conditioning case 13 by the rotation operation of the door main body 11. Specifically, the door 10 includes a defroster outlet opening and a face outlet opening formed in the air conditioning case 13. The door 10 is used as a blow mode switching door that opens and closes a foot blow opening or the like. Further, the door 10 is used as an air mix door for reciprocally adjusting the opening of the cold air passage and the opening of the hot air passage formed in the air conditioning case 13 or as an inside / outside air switching door for opening and closing the inside air introduction port and the outside air introduction port. May be used.

  A drive shaft 14 is disposed concentrically inside the cylindrical rotary shaft 12 so as to be rotatable. A male screw is formed on the outer peripheral surface of the drive shaft 14. One end of the drive shaft 14 in the axial direction (upper end in FIG. 1) passes through the bearing hole 13a and a small-diameter through hole 13c located at the center of the bearing hole 13a and protrudes outside the air conditioning case 13.

  On the outer wall surface of the air conditioning case 13, a mounting base 13d is formed around the through hole 13c, and a mounting flange portion 15a of the driving motor 15 is fixed on the mounting base 13d by screws or the like. The motor 15 includes a motor such as a step motor and a direct current (DC) motor.

  One end of the drive shaft 14 (the upper end in FIGS. 1 (a) and 2 (a)) is inserted into the motor 15 through a through hole (not shown) in the center of the mounting flange 15a, Coupled to the rotor portion of the motor 15. Here, since one end portion of the drive shaft 14 is coupled to the rotor portion of the motor 15 without interposing a reduction mechanism, the drive shaft 14 rotates at the same rotational speed as the rotor portion of the motor 15.

  On the other hand, an annular female screw member 16 in which a female screw meshing with a male screw on the outer peripheral surface of the drive shaft 14 is formed on the inner peripheral surface is disposed inside the cylindrical rotating shaft 12. Here, since the outer peripheral surface of the female screw member 16 is loosely fitted to the inner peripheral surface of the rotating shaft 12 through a minute gap, the female screw member 16 is guided by the inner peripheral surface of the cylindrical rotating shaft 12. The inside of the rotating shaft 12 can be moved in the axial direction.

  A drive pin 16 a that protrudes outward in the radial direction is integrally provided on the outer peripheral surface of the female screw member 16. As shown in FIG. 2B, the drive pin 16 a passes through a shaft drive groove 17 provided in the cylindrical rotary shaft 12 and protrudes outward in the radial direction of the rotary shaft 12. FIG. 3 shows the shape of the shaft drive groove 17 and is a view as seen from the direction of arrow A in FIG. The shaft drive groove 17 is formed so as to extend in the axial direction of the rotary shaft 12.

  In the present embodiment, the shaft driving groove 17 is formed over substantially the entire axial direction of the rotating shaft 12 excluding the vicinity of both ends of the rotating shaft 12 in the axial direction. The strength of the rotating shaft 12 can be improved by forming an annular connecting portion in the vicinity of both end portions of the rotating shaft 12 in the axial direction. If there is no problem in securing the strength of the rotary shaft 12, the shaft drive groove 17 may be formed over the entire area of the rotary shaft 12 in the axial direction. The width dimension of the shaft driving groove 17 is made a minute amount larger than the outer diameter dimension of the driving pin 16a so that the driving pin 16a can slide inside the shaft driving groove 17.

  The shaft drive groove 17 is formed in a meandering shape intersecting the axial direction of the rotary shaft 12 as shown in FIG. More specifically, a parallel area 17a parallel to the axial direction of the rotary shaft 12 is provided in the axial direction central portion of the rotary shaft 12 in the shaft drive groove 17, and the rotary shaft 12 is provided on both sides before and after the parallel area 17a. Diagonal areas 17b and 17c that obliquely intersect the axial direction are provided. Furthermore, parallel sections 17d and 17e are provided outside the oblique sections 17b and 17c, that is, near both ends in the axial direction of the rotary shaft 12.

  The air conditioning case 13 is integrally formed with a pin receiving groove 18 into which the drive pin 16a is slidably fitted as shown in FIG. The pin receiving groove 18 is disposed in a portion of the air conditioning case 13 that faces the rotating shaft 12 (a right portion of the rotating shaft 12 in FIG. 1A).

  Further, the pin receiving groove 18 is formed in parallel with the rotary shaft 12 over substantially the entire axial direction of the rotary shaft 12. The pin receiving groove 18 is formed in a U-shaped cross section (in other words, a bowl-like shape) having a width dimension that is a minute amount larger than the outer diameter dimension of the drive pin 16a. By inserting and engaging the tip of the drive pin 16a in the pin receiving groove 18 having such a shape, the rotation of the female screw member 16 is prevented.

  Next, the operation of this embodiment in the above configuration will be described. When the motor 15 is energized to operate the motor 15, the drive shaft 14 coupled to the rotor portion of the motor 15 rotates at the same rotational speed as the rotor portion of the motor 15. On the other hand, when the drive pin 16 a of the female screw member 16 is engaged with the pin receiving groove 18 of the air conditioning case 13, the rotation of the female screw member 16 is prevented.

  As a result, when the drive shaft 14 rotates, the female screw member 16 is moved along the pin receiving groove 18 in the rotary shaft 12 (in other words, in the axial direction of the rotary shaft 12) due to the engagement of the male screw and the female screw member 16 of the drive shaft 14. Along a straight line).

  The rotating shaft 12 is rotated by the linear movement of the female screw member 16. That is, the drive pin 16 a of the female screw member 16 penetrates the shaft drive groove 17 of the rotary shaft 12 and engages with the pin receiving groove 18, and the shaft drive groove 17 is formed in a meandering shape that intersects the axial direction of the rotary shaft 12. Therefore, when the drive pin 16a of the female screw member 16 moves linearly along the axial direction of the rotary shaft 12 in the oblique sections 17b and 17c of the shaft drive groove 17, the rotational direction of the drive pin 16a with respect to the rotary shaft 12 is changed. A force is applied and the rotating shaft 12 rotates.

  More specifically, in FIG. 3, when the drive pin 16a moves linearly in the direction of arrow B1, the rotary shaft 12 rotates in the direction of arrow B2. When the drive pin 16a moves linearly in the direction of arrow C1, the rotary shaft 12 moves in the direction of arrow C2. Rotate to. As the rotary shaft 12 rotates in this way, the flat door body 11 rotates around the rotary shaft 12 to open and close the air passage of the air conditioning case 13.

  In the shape example of the shaft drive groove 17 shown in FIG. 3, parallel areas 17 a, 17 d, and 17 e parallel to the axial direction of the rotary shaft 12 near the central portion in the axial direction of the rotary shaft 12 and the both ends in the axial direction of the rotary shaft 12. When the drive pin 16a is located within the range of the parallel areas 17a, 17d, and 17e, the drive pin 16a moves linearly along the parallel areas 17a, 17d, and 17e. No force in the rotational direction is applied to 12. Accordingly, the rotation of the rotating shaft 12 is stopped.

  For this reason, even if a motor 15 having a low control accuracy of the rotation stop position is used, by setting a predetermined amount of the axial length of the parallel sections 17a, 17d and 17e of the shaft drive groove 17, the rotary shaft 12 And the rotation of the door main body 11 can be reliably stopped at a predetermined position.

  By the way, according to the present embodiment, the rotation of the drive shaft 14 can be decelerated by the female screw member 16 linearly moving in the axial direction of the rotary shaft 12 by the meshing of the screws with respect to the rotation of the drive shaft 14.

  Therefore, since the speed reduction mechanism of the motor 15 can be built in the rotating shaft 12 portion of the door 10, it is not necessary to incorporate the speed reduction mechanism in the motor 15 itself, and the motor 15 can be downsized.

  Moreover, since the rotary shaft 12 of the door 10 can be rotated by the engagement between the drive pin 16a of the female screw member 16 and the shaft drive groove 17, a mechanism corresponding to the link mechanism of the prior art is also configured in the rotary shaft 12 portion of the door 10. be able to. Therefore, it is not necessary to provide a link mechanism as in the prior art independently between the motor 15 and the rotary shaft 12 of the door 10. As described above, the physique of the entire door driving device including the motor 15 and the door 10 can be reduced in size.

  In the example of the shape of the shaft driving groove 17 shown in FIG. 3, parallel sections 17a, 17d, and 17e are provided in the vicinity of both the axial center of the rotating shaft 12 and both ends of the rotating shaft 12 in the axial direction. The oblique section is continuously provided in the central portion of the rotating shaft 12 in the axial direction, and the parallel sections are provided only on both front and rear sides of the oblique section of the central portion, that is, in the vicinity of both end portions of the rotating shaft 12 in the axial direction. Also good. That is, the diagonal area (rotation area) and the parallel area (rotation stop area) of the shaft driving groove 17 may be changed to various forms according to the required door operation pattern.

(Second Embodiment)
FIG. 4 shows a second embodiment in which the door driving device according to the present invention is applied to a film door 20. Here, the film door 20 is formed of a resin thin film member that can be easily deformed as is well known, and both end portions of the film door 20 are connected to the first and second winding shafts 21 and 22 and the first and second film doors 20 are connected. Winding or unwinding is performed on the winding shafts 21 and 22. Between the first winding shaft 21 and the second winding shaft 22, a wire 23 for rotation interlock is provided.

  And any one of the 1st, 2nd winding shafts 21 and 22, for example, the 1st winding shaft 21 is the cylindrical hollow shaft which has the shaft drive groove 17 similarly to the door rotating shaft 12 of 1st Embodiment. The drive shaft 14 and the female screw member 16 of the first embodiment are built in the first winding shaft 21, and the screw engagement between the drive shaft 14 and the female screw member 16 and the drive pin of the female screw member 16 are performed by the rotation of the motor 15. The first take-up shaft 21 is rotated through the engagement between 16a and the shaft drive groove 17 of the first take-up shaft 21.

  As a result, the first winding shaft 21 becomes a drive shaft, while the second winding shaft 22 rotates in conjunction with the first winding shaft 21 and thus becomes a driven shaft. And the film door 20 moves to the left-right direction of FIG. 4 by winding up on the 1st, 2nd winding shafts 21 and 22, or unwinding, and the opening part 20a of the film door 20 is also accompanying this. The plurality of air passages 24 and 25 of the air conditioning case 13 are opened and closed by moving in the left-right direction in FIG. FIG. 4 shows a state in which the left air passage 24 is fully closed and the right air passage 25 is fully opened.

(Third embodiment)
FIG. 5 shows a third embodiment in which the door driving device according to the present invention is applied to the slide door 26. Here, the slide door 26 is configured by a plate-like rigid member as is well known, and slides in the left-right direction in FIG. 5 along the opening end faces of the plurality of air passages 24, 25 of the air conditioning case 13. .

  Of the plate surfaces of the slide door 26, on the plate surface opposite to the opening end surfaces of the air passages 24, 25 (the plate surface on the lower side in FIG. 5), the moving direction of the slide door 26 (left and right direction in FIG. 5). A gear (rack) 26a extending in a straight line is formed, and the gear 27 on the outer peripheral surface of the rotary shaft 12 is engaged with the gear 26a.

  Thereby, the slide door 26 slides in the left-right direction in FIG. 5 along the opening end faces of the air passages 24 and 25 by the rotation of the rotary shaft 12, so that the plurality of air passages 24 and 25 of the air conditioning case 13 can be opened and closed. . FIG. 5 shows a state in which the left air passage 24 is fully opened and the right air passage 25 is fully closed.

  The rotating shaft 12 has the same configuration as that of the first embodiment, and the rotating shaft 12 is rotationally driven by the motor 15 by the same mechanism as that of the first embodiment.

(Fourth embodiment)
FIG. 6 shows a fourth embodiment in which the door driving device according to the present invention is applied to the rotary door 28. Here, as is well known, the rotary door 28 has a configuration in which an outer peripheral wall surface 28b is integrally coupled to the rotary shaft 12 via a fan-shaped side plate 28a. The outer peripheral wall surface 28 b has an arc shape with a predetermined radius around the rotation shaft 12, and the outer peripheral wall surface 28 b and the side plate 28 a rotate integrally with the rotation shaft 12.

  On the other hand, a plurality of air passages 24 and 25 are arranged in an arc shape in the air conditioning case 13 along the rotation locus of the outer peripheral wall surface 28b, and the plurality of air passages 24 and 25 can be opened and closed by the rotation of the outer peripheral wall surface 28b. FIG. 6 shows a state where the left air passage 24 is fully opened and the right air passage 25 is fully closed.

  The rotating shaft 12 has the same configuration as that of the first embodiment, and the rotating shaft 12 is rotationally driven by the motor 15 by the same mechanism as that of the first embodiment.

  In any of the second to fourth embodiments described above, the same operational effects as those of the first embodiment can be exhibited.

(Other embodiments)
In each of the above-described embodiments, the example in which the air conditioning device to be driven by the motor 15 is an air passage opening / closing door has been described. However, the flow rate of hot water flowing into the heating heat exchanger as the air conditioning device to be driven The present invention may be applied to a drive device for the hot water flow rate adjusting valve using a hot water flow rate adjusting valve for adjusting the temperature. Further, the present invention may be applied to a driving device such as an expansion valve of a refrigeration cycle.

(A) is sectional drawing which shows the whole structure of the door drive device by 1st Embodiment of this invention, (b) is sectional drawing which shows the pin receiving groove which the door drive pin of (a) engages. (A) is detailed sectional drawing of the principal part of Fig.1 (a), (b) is sectional drawing of the axis perpendicular direction of the door of (a). It is A arrow view of FIG. It is sectional drawing which shows schematic structure of the door drive device by 2nd Embodiment of this invention. It is sectional drawing which shows schematic structure of the door drive device by 3rd Embodiment of this invention. It is sectional drawing which shows schematic structure of the door drive device by 4th Embodiment of this invention. It is sectional drawing which shows the whole structure of the door drive device by a prior art.

Explanation of symbols

10, 20, 26, 28 ... air conditioning doors, 12, 21 ... rotating shaft, 13 ... air conditioning case,
DESCRIPTION OF SYMBOLS 14 ... Drive shaft, 15 ... Motor, 16 ... Female screw member, 16a ... Drive pin, 17 ... Shaft drive groove, 18 ... Pin receiving groove (rotation prevention means).

Claims (4)

A cylindrical rotating shaft (12, 21) for driving the device to be driven;
A drive shaft (14) disposed rotatably inside the cylindrical rotation shaft (12, 21), one end projecting to the outside of the cylindrical rotation shaft (12, 21) and forming an external thread on the outer peripheral surface; ,
A motor (15) coupled to the one end of the drive shaft (14) outside the cylindrical rotary shaft (12, 21) and rotating the drive shaft (14);
It arrange | positions so that it may mesh with the external thread of the said drive shaft (14) inside the said cylindrical rotating shaft (12, 21), and it can move to the axial direction of the said cylindrical rotating shaft (12, 21). A female screw member (16);
The cylindrical rotation shaft (12, 21) is formed so as to penetrate the wall surface of the cylindrical rotation shaft (12, 21) and extend in the axial direction of the cylindrical rotation shaft (12, 21), and the axis of the cylindrical rotation shaft (12, 21). An axial drive groove (17) having diagonal areas (17b, 17c) intersecting the direction;
A drive pin (16a) provided integrally with the female screw member (16), inserted into the shaft drive groove (17) and having a tip projecting outside the shaft drive groove (17);
An apparatus driving device comprising rotation prevention means (18) that engages with a tip of the drive pin (16a) and prevents rotation of the female screw member (16). The said shaft drive groove (17) has a parallel area (17a, 17d, 17e) parallel to the axial direction of the said cylindrical rotating shaft (12, 21). Equipment drive device. The apparatus driving apparatus according to claim 1 or 2,
The device to be driven is an air conditioning door (10, 20, 26, 28). The air conditioning door (10, 20, 26, 28) is disposed in an air conditioning case (13), and the air conditioning case ( An air conditioner characterized in that the air passage (24, 25) of 13) is opened and closed. The rotation preventing means is formed in the air conditioning case (13) so as to extend in the axial direction of the cylindrical rotating shaft (12, 21), and a pin receiving groove (in which a distal end portion of the drive pin (16a) is inserted ( 18) The air conditioner according to claim 3.

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