JP2008001218A - Slide door drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cause an rotation output of an actuator for driving a slide door of a vehicle air conditioner to prevent an inconvenient operation such as a hunting of the slide door caused by an assembly error of a gear transmission system. <P>SOLUTION: A drive gear 22 and a driven gear 18 meshing therewith, provided between the actuator and the slide door, are sectioned in a meshing section A and a section B for releasing meshing. At Full Hot and Full Cold positions being the section B for releasing the meshing of the drive gear 22 and the driven gear 18, the drive gear 22 and the actuator 20 for outputting thereto by rotation are idled, and the actuator 20 is reliably stopped to prevent hunting from occurring. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a slide door driving device that is provided in an air passage and moves a slide door that changes the flow of introduced air.

  In an automotive air conditioner, a mix door is provided on the front surface of a heater (heater core) downstream of a cooler (evaporator) to vary the amount of air flowing into the heater. However, since this mix door has a structure in which a flat plate is attached to the rotation shaft and rotates around the rotation shaft, a space for rotating the mix door is required. In addition, there is a demand for reducing the space, and a sliding slide door has been adopted to achieve this demand.

For example, as shown in Patent Document 1 of the present applicant, pinions 21 a and 21 b provided on the drive shaft 22 are meshed with racks 16 a and 16 b formed in the vertical direction of the slide door 15. The pinions 21a and 21b are rotated by rotating 22. Then, the slide door 15 is moved in the vertical direction to adjust the amount of air flowing to the hot air passage 5 and the cold air passage 7.
JP2003-104032A

As shown in Patent Document 2, a circular gear 41 is connected to the outer end of the drive shaft described above, and a fan-shaped gear 42 is engaged with the circular gear 41, and an operating pin protruding from the fan-shaped gear 42 is provided. An electric operation mechanism using an actuator such as a servo motor is connected.
JP-A-9-193645

As an actuator such as the servo motor, the present applicant has rotated a drive shaft using a “motor actuator” disclosed in Patent Document 3. From line 4 to line 22 in the third column of the document 3, "The specific example in FIG. 3 is for the case where the motor 4 rotates in two forward and reverse directions. The control switch 14 is shown in FIG. Similar to the specific example shown, it is common in that it is provided on the back surface side of the output gear 8, but the restriction unit 30 that restricts the upper and lower rotation angles of the output shaft 9 and the detection that detects the position of the output shaft 9. The restriction part 30 is inserted into the drive circuit of the motor 4 and has movable contacts 17b to 17d on the back surface of the output gear 8, and arc-shaped fixed contacts 18t to 18h on the wiring board 32. The upper and lower limits of the rotation angle of the output shaft are determined by the lengths of the other fixed contacts 18g and 18h with the outermost fixed contact 18t as a common contact. Is provided on the anti-regulator part side and The contact points 17e and 17f and the fixed contact points 18i and 18j are configured. One fixed contact point 18i is a resistance plate, and the rotation angle of the output shaft 9 is converted into a resistance value and fed back to the control circuit. Is described.
Reality 1-19577

  In other words, the upper and lower limits of the motor actuator are regulated by the lengths of the two fixed contacts 18g and 18h.

  However, the rotational force from the rotating output actuator is transmitted to the rack of the sliding door meshed with the sliding door driving gear attached to the driven gear shaft via the driven gear meshing with the fan-shaped driving gear, and the sliding door is moved up and down. However, since two sets of gears are used, it is inevitable that the assembly error will increase. This assembly error finally appears as a change in the vertical movement of the slide door.

  Further, the gear is formed with teeth of equal pitch on both the driving side and the driven side, and therefore, the rotational force is transmitted as a proportional operation (rotation). For this reason, the assembly error of the rotational force transmission system is shifted between the actual position of the sliding door and the position detected by the contact position on the actuator side. This is recognized as a state in which the sliding door has not reached such a state, even though the sliding door has reached a predetermined position, in particular, the positions of Full Hot and Full Cold. become.

  For this reason, the rotation output is continuously output from the actuator, and not only the sliding door enters the hunting state, but also an abnormal current flows to the actuator, causing the actuator to break down. As a countermeasure, it is possible to change the drive (software) control circuit of the actuator, but this is not practical because it costs a lot of money.

  Therefore, the present invention aims to solve the inconvenient movement of the sliding door due to the assembly error by considering the meshing relationship between the drive gear of the actuator of the rotational force transmission system and the driven gear meshing therewith. It is an issue.

  In order to achieve the above object, a sliding door drive device according to the present invention includes an actuator that rotates and outputs, a drive gear that is rotated by the actuator, a driven gear that meshes with the drive gear, and a fixed to the driven gear. And a driven gear shaft, wherein the rotational force of the actuator is transmitted to the driven gear shaft to move the sliding door provided on the air passage of the air conditioning case. In this case, an area for releasing the meshing with the driven gear is set, and only the rotation of the drive gear is allowed (claim 1).

  As a result, if the drive gear rotates and the rotation advances near the final end to one end (Full Hot or Full Cold) and reaches the position where the slide door has moved to the maximum (contacted with the air conditioning case), The driven gear enters the area where the engagement with the drive gear is released, the driven gear stops rotating, only the drive gear is rotated and can be rotated until it reaches a predetermined position (operating angle), which is confirmed by the detecting means and rotated from the actuator. Output is stopped. That is, no more force is applied to the slide door, and the hunting operation is prevented.

  In the area where the engagement between the drive gear and the driven gear is released, the tooth pitch of the drive gear is coarsened, the tooth pitch of the driven gear is coarsened, or the tooth pitch of both gears is coarsened. (Claim 2).

  Even in an area where the meshing between the drive gear and the driven gear can be released, in order to prevent the driven gear from reversing, the driven gear and the drive gear are removed from the meshing release area and the pair of teeth are in a locked state. It is preferable to maintain it (Claim 3). Thereby, the effect | action which prevents the problem that a driven gear reverse | inverts, when the meshing | engagement with the drive gear of a driven gear is temporarily cancelled | released, ie, the effect | action which maintains the rotation position, is given. As a specific configuration thereof, it is preferable that one of the pair of teeth maintaining the locked state has an inversion wrap margin (claim 4).

  As described above, according to the present invention, the inconvenience due to the rotational output of the actuator caused by the assembly error of the rotational force transmission system is caused in the meshed state of the drive gear and the driven gear meshed with it, that is, near the rotational ends of the drive gear. The sliding door is provided with an area for releasing the engagement between the drive gear and the driven gear, and is rotated without transmitting the rotation output generated by the insufficient rotation angle of the actuator to the driven gear, and without changing the rotation angle of the driven gear. Hunting can be prevented. This has the effect of relaxing the assembly conditions of the rotational force transmission system. Moreover, it can contribute to the change of the movement characteristic of a sliding door by changing suitably the area | region which cancel | releases meshing | engagement with a drive gear and a driven gear (Claim 1 and 2).

  Further, even in the area where the engagement between the drive gear and the driven gear can be released, the driven gear is prevented from being reversed because the drive gear and the pair of teeth are maintained in the locked state (Claim 3). In order to appropriately obtain the anti-inversion action characteristic, an inversion wrap margin is formed on one of the pair of teeth, and the characteristic can be achieved with a simple configuration.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2, a slide door 4 provided in an automobile air conditioner 1 and a slide door drive device 2 that moves the slide door 4 are shown. The automotive air conditioner 1 provided with the slide door 4 and the like is provided with a blower (not shown) on the upstream side of the air conditioning case 3 serving as an air conditioning duct, and guides air inside or outside the vehicle.

  This air passes through an evaporator (not shown) in the air passage 6 and is cooled and a part of the cold air passes through the heater core 7 in the hot air passage 8 to be heated. Then, the warm air and the cool air flowing through the cool air passage 9 bypassing the heater core 7 are mixed in the downstream region to reach a desired temperature, and are blown into the vehicle interior from the blow mode connection ports according to the blow modes. Indoor air conditioning is performed.

  The sliding door 4 is provided in the air passage 6 in the vertical direction between the evaporator and the heater core 7, and the hot air passage in which the heater core 7 is arranged with the air (cold air) flowing through the air passage 6 depending on the position. 8 and the cool air passage 9 that bypasses the heater core.

  The sliding door 4 is rectangular and has a lateral dimension that is slightly shorter than the inner width dimension of the air conditioning case 3 described above, and the vertical dimension is about a half of the inner dimension of the air conditioning case 3 described above. It has become. Both ends of the slide door 4 are inserted into a pair of guide grooves 11a and 11b formed in the air passage 6 inside the air conditioning case 3 in the vertical direction, and slide in the guide grooves 11a and 11b.

  The slide door 4 is reinforced by forming a plurality of ribs in the vertical direction (not shown), and racks 13a, which mesh with slide door drive gears 14a and 14b described below, near both ends in the horizontal direction. 13b is formed in the up-down direction (vertical direction).

  The slide door drive gears 14 a and 14 b are engaged with the racks 13 a and 13 b and are fixed to the driven gear shaft 16. The driven gear shaft 16 is hung on the air conditioning case 3, and the rotational force is transmitted from one end protruding outward. By rotating the driven gear shaft 16, the slide door drive gears 14 a and 14 b are rotated, and the slide door 4 moves while being guided in the vertical direction by the guide grooves 11 a and 11 b, and the heater core 7 communicated with the air passage 6. The hot air passage 8 where the air flow is arranged and the cold air passage 9 bypassing the hot air passage 8 are opened and closed in inverse proportion, and the amount of air fed into the hot air passage 8 is proportionally distributed.

  The amount of movement of the slide door 4 is determined by the required blowing temperature. However, in the state shown in FIG. 1, the cold air passage 9 is fully open, and the entire amount of the introduced air flows into the cold air passage 9 during maximum cooling. (Full Cold). When the slide door 4 moves upward, a part of the hot air passage 8 is opened and a part of the cold air passage 9 is closed, and the state shown in FIG. Then, air is mixed with the cold air at the downstream distribution site and blown out from the desired blow mode connection port into the passenger compartment.

  A driven gear 18 is fixed to the outer end of the driven gear shaft 16. The driven gear 18 meshes with a drive gear 22 fixed to the output shaft 21 of the actuator 20 that rotates and outputs as described below.

  In FIG. 3, the meshing relationship between the drive gear 22 and the driven gear 18, the meshing relationship between the slide door drive gears 14a and 14b and the racks 13a and 13b, and the position of the slide door 4 are shown. As shown in the exploded view of FIG. 4, the drive gear 22 is formed in a fan shape, spreads about 80 degrees around the output shaft 21 of the actuator 20, and teeth 24 a are formed at the outermost circular arc portion as described below. Has been. An arrow is formed at the center of about 40 degrees from the left and right ends, and the meshing position with the driven gear 18 is determined by using a large tooth 24b having only about twice that portion to prevent erroneous assembly. Yes.

  Four standard teeth 24a are formed at equal pitches on the left and right sides of the misassembly prevention teeth 24b, and a large tooth groove 25 is formed on the outer side thereof. Two large teeth 24c and 24d having a pitch larger (coarse) than the pitch of the other teeth are formed.

  The driven gear 18 is circular and has large teeth 26 corresponding to large teeth 24b for preventing erroneous assembly, and four standard teeth 27a are formed at equal pitches from the teeth in the left-right direction. ing. Then, a large tooth 27b is formed on the outside, and a standard tooth 27c is provided one by one with a large tooth groove outside the tooth. The teeth 27c and 27c are adjacent to each other and have a large tooth groove 28 therebetween.

  As described above, the drive gear 22 and the driven gear 18 having the above-described configuration are the four large standard teeth 27a and the large teeth 24b and the tooth grooves 25 of the drive gear 22 and the tooth grooves 26 of the driven gear 18, respectively. Engage with the large teeth 27b to form this meshing area A. In this meshing area A, an equal pitch proportional operation is performed, and the driven gear 18 is rotated proportionally as the drive gear 22 rotates. The That is, the slide door 4 is slid up and down.

  Beyond that, it reaches a zone B where the meshing can be released, and there is an idling region where the drive gear 22 and the driven gear 18 can only mesh irregularly.

  The operation in the area B for releasing the meshing will be described in detail with reference to FIGS. 5 to 9. In FIG. 5, the drive gear 22 has a large tooth 24 b at the tip of the center arrow meshed with the groove 26 of the driven gear 18. In this state, the slide door 4 is in the middle of the guide grooves 11a and 11b, and the hot air passage 8 and the cold air passage 9 are both in a half-open state.

  In FIG. 6, the drive gear 22 rotates counterclockwise from the state shown in FIG. 5 to the full hot position, and the driven gear 18 also rotates together to move the slide door 4 to the full hot position, that is, the slide door. The upper lining 4 (shown in FIGS. 1, 2, and 3) is in contact with the inner surface of the air conditioning case 3.

  FIG. 7 shows an enlarged view of the main part of the drive gear 22 and the driven gear 18, and the standard teeth 27c of the driven gear 18 are free, and the rotation of the drive gear 22 is not transmitted. As a result, the main object of the present invention is achieved, but the driven gear 18 receives the reaction force obtained from the lining 29 coming into contact with the air conditioning case 3 and tries to rotate the driven gear 18 in the reverse direction. For this purpose, the drive gear 22 has the following configuration.

  Although it does not transmit the rotational force, the large teeth 24c of the drive gear 22 and the large teeth 27b of the driven shaft 18 come into contact with each other, and even if the drive gear 22 rotates, both teeth 24c slide with the teeth 27b. It is used to engage the reaction force due to the lining in the locked state. This characteristic is achieved by adjusting the size of the anti-reverse wrap margin formed on the large tooth 24c of the drive gear 22.

  In the position shown in FIG. 7, it is preferable that the slide door 6 is in the Full Hot position and the rotation output from the actuator 20 is also cut off. However, due to the inconvenience of the gear transmission mechanism, the actuator 20 that outputs the rotation output to the drive gear 22. When the output is not cut off and the output is continued, the drive gear 22 is further rotated from the position shown in FIG. 7 to the position shown in FIG. 8 (X-angle counterclockwise operation), and on the actuator 20 side. When the position (Full Hot) is reached, the contact is cut and output stops.

  That is, only the drive gear 22 is rotated without meshing with the driven gear 18, and the switch device in the actuator 20 is turned off, and the drive gear 22 is stopped. Even in this case, the contact of the teeth 24c and the teeth 27b for preventing the reverse rotation of the driven gear 18 continues. Thus, in the meshing state of the drive gear 22 and the driven gear 18, the region B (idling region) where the meshing can be released is provided at both ends thereof, so that the problem of the gear transmission system can be solved. The characteristic line is shown in FIG. If the idling region is changed, the characteristic line can be arbitrarily changed like a two-dot chain line. This has the advantage that the output characteristics can be structurally changed. In the above description, the Full Hot side has been described, but it goes without saying that the same effect can be obtained on the Full Cold side.

  In the area B where the meshing can be released, as described above, the large gears 24c, 24d having a large pitch on the drive gear 22 side and the large gear teeth on the driven gear 18 side have standard teeth 27c as described above. The teeth 27c and the teeth 27c are formed so as to have a large groove 28 and are formed on both the gears 22 and 18 side. It is also possible to achieve the object by providing a tooth portion having a rough pitch only.

It is sectional drawing of the air conditioner for motor vehicles in which the slide drive device of this invention was used. It is sectional drawing which makes a cutting direction same as the above different. It is an expanded block diagram of the sliding door apparatus which concerns on this invention. In the same as above, it is an explanatory view when the drive gear and the driven gear are separated. It is explanatory drawing of the proper meshing state of a drive gear and a driven gear. It is explanatory drawing showing a Full Hot rotation state, when a drive gear rotates to the Full Hot side to the maximum, and a driven gear also rotates with it. It is explanatory drawing of the principal part expansion same as the above. FIG. 8 is an explanatory diagram in which only the driving gear further rotates the X angle from the position of FIG. 7 and stops, but the driven gear is in the same position as the position of FIG. 7. It is a characteristic diagram which shows the relationship with the slide door in the rotation area of a drive gear, and has the idling area in the both ends of the rotation characteristic of a drive gear.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automotive air conditioner 2 Slide door drive device 3 Air conditioning case 4 Slide door 6 Air passage 8 Hot air passage 9 Cold air passage 13a, 13b Rack 14a, 14b Slide door drive gear 16 Drive gear shaft 18 Drive shaft 20 Actuator 22 Drive gear 24a Standard Teeth 24b Large Teeth 24c Large Teeth 24b Large Teeth 25 Large Teeth 26 Teeth 27a Standard Teeth 27b Large Teeth 29 Lining

Claims (5)

An actuator for rotating output; a drive gear rotated by the actuator; a driven gear meshing with the drive gear; and a driven gear shaft fixed to the driven gear;
In the sliding door drive device that transmits the rotational force of the actuator to the driven gear shaft and moves the sliding door provided on the air passage of the air conditioning case,
A slide door drive device characterized in that when the drive gear reaches near both rotational ends, an area for releasing the engagement with the driven gear is set, and only the rotation of the drive gear is allowed.   The area where the meshing of the drive gear and the driven gear is released is a sliding door drive characterized in that the gear pitch of the drive gear is roughened, the tooth pitch of the driven gear is roughened, or the tooth pitch of both gears is roughened. apparatus.   Even in an area where the engagement between the drive gear and the driven gear can be released, in order to prevent the driven gear from reversing, the driven gear and the drive gear are removed from the area and the pair of teeth are kept locked. The sliding door driving device according to claim 1, wherein the sliding door driving device is provided.   The sliding door drive device according to claim 3, wherein one of the pair of teeth maintaining the locked state has an inversion wrap margin. 4. The sliding door according to claim 1, wherein the actuator for rotating output has a feedback resistance line for detecting a rotation angle and a fixed contact for defining an upper limit and a lower limit of the rotation angle. Drive device.

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