Electric limiting actuator for air door of automobile air conditioner

Abstract

The utility model discloses an automobile air conditioner air door electric limit actuator which comprises an actuator upper cover plate and an actuator lower cover plate, the actuator upper cover plate and the actuator lower cover plate can be attached to each other to form a closed installation cavity, a driving motor is arranged in the installation cavity, the output end of the driving motor is connected with a reduction gear, and the reduction gear is connected with a motor. An electric limiting plate is further arranged in the installation cavity, conductive foil is arranged on one side of the electric limiting plate, an electric brush corresponding to the conductive foil is arranged on the reduction gear, the reduction gear is driven to rotate, the electric brush can be forced to be tightly attached to the conductive foil on the electric limiting plate to rotate, the conductive foil interacts with the electric brush, and the reduction gear can stop at the limiting position corresponding to forward and reverse rotation. The beneficial effects of the utility model are that through the arrangement of the electric limiting plate, the reduction gear can be stopped at a limit position corresponding to positive and negative rotation by means of the interaction between the electric brush and the conductive foil, thereby ensuring the service life of the air door and the actuator.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to an electric limit actuator for an automobile air-conditioning damper. Background Art

[0002] The automotive air conditioner damper actuator is one of the most common automotive accessories, which is mainly used to control the switch of the vehicle air conditioner damper and the amount of air output of the damper. In the prior art, an electric motor is configured inside the actuator, and the output end of the electric motor is engaged with the reduction gear. The damper is sleeved in the middle of the reduction gear. By driving the electric motor to rotate, the damper can be controlled to rotate.

[0003] However, since there is no limiting mechanism, when the motor drives the damper to close, the motor cannot stop rotating in time, which causes the air conditioning damper to continue to exert pressure on the air conditioning casing. Over time, it not only affects the service life of the motor, but may also cause the damper shaft to break. Utility Model Content

[0004] In view of this, the utility model provides an electric limit actuator for an automobile air-conditioning damper, which is intended to timely interrupt the rotation of the damper, prevent the damper shaft from breaking, and increase the service life of the actuator.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] An electric limit actuator for an automobile air-conditioning damper comprises an actuator upper cover plate and an actuator lower cover plate, wherein the actuator upper cover plate and the actuator lower cover plate can fit together to form a closed installation chamber, and is characterized in that a driving motor is provided inside the installation chamber, the output end of the driving motor is connected to a reduction gear, the middle part of the reduction gear is used for sleeve automobile air-conditioning damper, an electric limit plate is also provided in the installation chamber, a conductive foil is arranged on one side of the electric limit plate, a brush corresponding to the conductive foil is provided on the reduction gear, and driving the reduction gear to rotate can force the brush to rotate close to the conductive foil on the electric limit plate, and the conductive foil interacts with the brush to stop the reduction gear at the limit position corresponding to the forward and reverse rotation.

[0007] By adopting the above structure, through the electric limit plate, relying on the interaction between the brush and the conductive foil, it can ensure that the reduction gear stops at the limit position corresponding to the forward and reverse rotation, that is, the air conditioner damper switch can stop rotating immediately when it reaches the limit position, thereby ensuring the service life of the damper and the actuator.

[0008] Preferably, the electric limit plate is integrated with a first drive circuit and a second drive circuit, both of which are connected in series with the drive motor; the first drive circuit is connected with a first drive power supply, a first diode and the conductive foil; the second drive circuit is connected with a second drive power supply, a second diode and the conductive foil; the positive and negative poles of the first drive power supply and the second drive power supply are oppositely arranged, and the first diode and the second diode are arranged in reverse. With the above structure, due to the unidirectional conductivity of the diode, and the positive and negative poles of the first drive power supply and the second drive power supply are oppositely arranged, and the first diode and the second diode are arranged in reverse, the two circuits are independent of each other, and the forward and reverse rotation of the drive motor can be limited respectively.

[0009] As a preference, the conductive foil is a copper foil, the surface of which is covered with a carbon film. The above structure is adopted to facilitate electrical conduction.

[0010] As a preferred embodiment, the actuator upper cover plate and the actuator lower cover plate are provided with retaining ribs correspondingly, and the retaining ribs are used to limit the driving motor. The above structure can ensure that the driving motor can be fixedly installed.

[0011] Preferably, the actuator upper cover plate has a first through hole corresponding to the middle of the reduction gear, and the actuator lower cover plate has a second through hole corresponding to the middle of the reduction gear, and the first through hole and the second through hole are both used for sleeve automobile air conditioner damper. The above structure is adopted to facilitate the installation of the damper.

[0012] Preferably, the electric limit plate is provided with a contact, the actuator upper cover is provided with a groove corresponding to the contact position, the contact is inserted into the groove, and the groove is used to install a power plug to supply power to the actuator. The above structure can supply power to the entire actuator.

[0013] Preferably, a protrusion is provided at one end of the actuator lower cover, and a locking buckle is correspondingly provided on the actuator upper cover, and when the actuator upper cover and the actuator lower cover are fitted, the protrusion can be buckled on the locking buckle. The above structure can ensure that the entire actuator is assembled more firmly and compactly.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The electric limit actuator for the air-conditioning damper of the automobile provided by the utility model can ensure that the reduction gear stops at the limit position corresponding to the forward and reverse rotation by means of the electric limit plate set up and relying on the interaction between the brush and the conductive foil, that is, the air-conditioning damper switch can stop rotating immediately when it reaches the limit position, thereby ensuring the service life of the damper.

[0016] 2. The first drive circuit and the second drive circuit are both connected in series with the drive motor, and the positive and negative poles of the first drive power supply and the second drive power supply are oppositely arranged, and the first diode and the second diode are arranged in reverse. By utilizing the unidirectional conductivity of the diode and the conductive contact between the brush and the conductive copper foil, the first drive circuit and the second drive circuit can independently control the rotation of the drive motor. When the brush runs beyond the edge of the conductive copper foil, the entire circuit is broken, and even if the drive motor is continuously powered, the motor will not rotate, thereby ensuring the service life of the entire actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an exploded diagram of the electric limit actuator of the automobile air-conditioning damper;

[0018] Figure 2 It is a structural schematic diagram of the actuator upper cover plate 1;

[0019] Figure 3 It is a structural schematic diagram of the actuator lower cover 2;

[0020] Figure 4 It is a structural schematic diagram of the electric limit plate 5;

[0021] Figure 5 It is a cross-sectional schematic diagram of an electric limit actuator for an automobile air-conditioning damper;

[0022] Figure 6 This is the simulation circuit diagram of the electric limit actuator of the automobile air-conditioning damper;

[0023] Figure 7 This is the digital circuit diagram of the electric limit actuator for the automotive air conditioning damper. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with embodiments and drawings.

[0025] like Figure 1 and Figure 5 As shown, an electric limit actuator for an automobile air-conditioning damper includes an actuator upper cover plate 1 and an actuator lower cover plate 2, and the actuator upper cover plate 1 and the actuator lower cover plate 2 can fit together to form a closed installation chamber a. A driving motor 3 is installed inside the installation chamber a, and a reduction gear 4 is meshed and assembled at the output end of the driving motor 3. The middle part of the reduction gear 4 is used for sleeve installation of the automobile air-conditioning damper. An electric limit plate 5 is also installed inside the installation chamber a, and a conductive foil is arranged on one side of the electric limit plate 5. In this embodiment, copper is preferably used as the material for making the conductive foil to ensure that the electric limit plate 5 has good conductivity. A brush 6 corresponding to the conductive foil is fixedly installed on the reduction gear 4. Driving the reduction gear 4 to rotate can force the brush 6 to rotate close to the conductive foil on the electric limit plate 5. The conductive foil interacts with the brush 6 to stop the reduction gear 4 at the limit position corresponding to the forward and reverse rotation.

[0026] With such a design, through the design of the electric limit plate 5, when the reduction gear 4 rotates, the driving brush 6 interacts with the conductive foil, so that the reduction gear 4 can be stopped at the limit position corresponding to the forward and reverse rotations, that is, the automobile air-conditioning damper can be stopped in time when it rotates to the limit position, thereby preventing the damper from continuously applying force to the automobile air-conditioning outlet and causing the damper's shaft to break, thereby ensuring the service life of the automobile air-conditioning damper.

[0027] Specifically, the electric limit plate 5 is integrated with a first drive circuit and a second drive circuit, and the first drive circuit and the second drive circuit are both connected in series with the drive motor 3. The first drive circuit is connected with a first drive power supply, a first diode 9 and a conductive foil, and the second drive circuit is connected with a second drive power supply, a second diode 10 and a conductive foil. The positive and negative poles of the first drive power supply and the second drive power supply are oppositely arranged, and the first diode 9 and the second diode 10 are arranged in reverse. Since the diode has unidirectional conductivity, this makes the first drive circuit and the second drive circuit independent of each other, that is, the first drive circuit and the second drive circuit are used to control the limit of the forward rotation and the limit of the reverse rotation of the drive motor 3 respectively.

[0028] In this embodiment, a carbon film is also coated on the surface of the conductive foil to ensure better conductivity between the brush 6 and the electric limit plate 5. Figure 6 and Figure 7 In the figure, the driving power supply A and the driving power supply B can provide power for the driving motor 3. When the driving power supply A is positive and the driving power supply B is negative, the driving power supply A and the driving power supply B together constitute the first driving power supply, which rotates clockwise. When the brush 6 follows the reduction gear 4 to rotate and exceeds the edge of the conductive foil, the driving motor 3 will not operate even if the driving power of the driving motor 3 is maintained due to the inability to conduct electricity. On the contrary, when the driving power supply A is negative and the driving power supply B is positive, the driving power supply A and the driving power supply B together constitute the second driving power supply, and the driving motor 3 rotates counterclockwise. When the brush 6 follows the reduction gear 4 to rotate and exceeds the edge of the conductive foil, the driving motor 3 will not operate even if the driving power of the driving motor 3 is maintained due to the inability to conduct electricity.

[0029] like Figure 3 and Figure 5 As shown, in order to ensure that the drive motor 3 can be fixedly installed, retaining ribs 7 are formed on the actuator upper cover plate 1 and the actuator lower cover plate 2. When the actuator upper cover plate 1 and the actuator lower cover plate 2 are fitted, the retaining ribs 7 can limit and fix the drive motor 3. Similarly, in order to ensure that the electric limit plate 5 can be fixedly installed, positioning columns 2c are also formed on the actuator lower cover plate 2, and positioning holes 5a are opened on the electric limit plate 5 corresponding to each positioning column 2c.

[0030] For example Figure 1As shown, the actuator upper cover plate 1 has a first through hole 1a at the middle position corresponding to the reduction gear 4, and the actuator lower cover plate 2 has a second through hole 2a at the middle position corresponding to the reduction gear 4. Such a design can ensure that the air conditioner damper can be installed.

[0031] Further, such as Figure 2 and Figure 4 As shown, a contact 8 is also welded on the electric limit plate 5, and a groove 1b is provided at the position of the actuator cover plate 1 corresponding to the contact 8. The contact 8 can be inserted into the groove 1b, wherein the groove 1b is used to install a power plug, and the entire actuator is powered by the contact 8.

[0032] like Figure 2 and Figure 3 As shown, in order to ensure that the actuator upper cover plate 1 and the actuator lower cover plate 2 fit more completely, in this embodiment, a protrusion 2b is formed at one end of the actuator lower cover plate 2, and a locking buckle 1c is formed at the position of the actuator upper cover plate 1 corresponding to the protrusion 2b. When the actuator upper cover plate 1 and the actuator lower cover plate 2 fit together, the protrusion 2b can be buckled on the locking buckle 1c. In addition, in order to further ensure the overall assembly strength of the actuator, the actuator upper cover plate 1 and the actuator lower cover plate 2 are additionally fixed by bolts.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. An electric limit actuator for an automobile air conditioner damper, comprising an actuator upper cover plate (1) and an actuator lower cover plate (2), wherein the actuator upper cover plate (1) and the actuator lower cover plate (2) can be attached to each other to form a closed installation chamber (a), characterized in that: A driving motor (3) is arranged inside the installation chamber (a), and the output end of the driving motor (3) is connected to a reduction gear (4). The middle part of the reduction gear (4) is used for sleeve automobile air-conditioning damper. An electric limit plate (5) is also arranged inside the installation chamber (a). A conductive foil is arranged on one side of the electric limit plate (5). A brush (6) corresponding to the conductive foil is arranged on the reduction gear (4). When the reduction gear (4) is driven to rotate, the brush (6) can be forced to rotate in close contact with the conductive foil on the electric limit plate (5). The conductive foil interacts with the brush (6) to stop the reduction gear (4) at a limit position corresponding to forward and reverse rotation.

2. The electric limit actuator for the air door of an automobile air conditioner according to claim 1 is characterized in that: The electric limit plate (5) is integrated with a first drive circuit and a second drive circuit, both of which are connected in series with the drive motor (3); The first driving circuit is connected with a first driving power source, a first diode and the conductive foil; The second driving circuit is connected with a second driving power supply, a second diode and the conductive foil; The positive and negative poles of the first driving power source and the second driving power source are oppositely arranged, and the first diode and the second diode are oppositely arranged.

3. The electric limit actuator for automobile air conditioner damper according to claim 1 is characterized in that: The conductive foil is a copper foil, and a carbon film is covered on the surface of the copper foil.

4. The electric limit actuator for automobile air conditioner damper according to claim 1, characterized in that: The actuator upper cover plate (1) and the actuator lower cover plate (2) are correspondingly provided with retaining ribs (7), and the retaining ribs (7) are used to limit the driving motor (3).

5. The electric limit actuator for automobile air conditioner damper according to claim 1, characterized in that: The actuator upper cover plate (1) is provided with a first through hole (1a) at a position corresponding to the middle of the reduction gear (4), and the actuator lower cover plate (2) is provided with a second through hole (2a) at a position corresponding to the middle of the reduction gear (4), and both the first through hole (1a) and the second through hole (2a) are used for sleeve automobile air conditioning dampers.

6. The electric limit actuator for automobile air conditioner damper according to claim 1, characterized in that: The electric limit plate (5) is provided with a contact (8), the actuator upper cover (1) is provided with a groove (1b) at a position corresponding to the contact (8), the contact (8) is inserted into the groove (1b), and the groove (1b) is used to install a power plug to supply power to the actuator.

7. The electric limit actuator for automobile air conditioner damper according to claim 1, characterized in that: The actuator lower cover (2) is provided with a protruding portion (2b) at one end, and the actuator upper cover (1) is correspondingly provided with a locking buckle (1c); when the actuator upper cover (1) and the actuator lower cover (2) are fitted together, the protruding portion (2b) can be buckled onto the locking buckle (1c).

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