An air conditioning damper actuator

Abstract

This utility model discloses an air conditioning damper actuator, relating to the field of valve actuators. The air conditioning damper actuator includes a housing, a power output mechanism, a reduction transmission mechanism, an output gear, a power control mechanism, and an angle sensor. The power output mechanism includes a motor and a worm gear sleeved on the output end of the motor. The reduction transmission mechanism converts the lateral rotational motion output by the power output mechanism into a longitudinal rotational motion, and links the longitudinal rotational motion to the output gear. The reduction transmission mechanism includes a three-stage gear meshing structure. The output gear drives the air conditioning unit damper mechanism to rotate. This application uses a worm gear + helical gear meshing mechanism, optimizing the worm gear lead angle. Motion can only be transmitted from the motor to the output gear, and cannot be transmitted back from the output gear to the motor, thus possessing reliable reverse self-locking performance and reliably stabilizing the damper at the required mode angle for a long period. This application features a compact structure, stable transmission, low noise, and high reliability.

Description

Technical Field

[0001] This utility model relates to the field of valve actuators, and in particular to an air conditioning damper actuator. Background Technology

[0002] A valve electric actuator is a machine that uses electricity as its primary energy source to drive the opening and closing of valves or to a certain degree of opening. Most common valve electric actuators use planetary reducers for speed reduction, such as the valve actuator with publication number CN 103697220A. However, because planetary reducers have many gears and gear rings with complex meshing relationships, they are more prone to misalignment or jamming. Furthermore, planetary reducers occupy a large amount of space, making them unsuitable for small equipment.

[0003] A gear structure for a valve electric actuator, disclosed in publication number CN214120475U, includes a motor gear, an output gear, and a reduction gear. The reduction gear is a double gear consisting of a first gear and a second gear, mounted on one side of the motor gear and the output gear via a gear shaft. The first gear is adapted to the motor gear, and the second gear is adapted to the output gear. However, in actual use, it is prone to rotating even when no power is applied, failing to self-lock. Utility Model Content

[0004] The purpose of this application is to provide an air conditioning damper actuator that solves the problem that existing air conditioning damper actuators tend to rotate even when not powered, under reverse load at the output end, and cannot self-lock.

[0005] To address the aforementioned technical problems, embodiments of this application provide an air conditioning damper actuator, comprising:

[0006] A housing; and a power output mechanism fixed within the housing for providing power to the output gear, the power output mechanism including a motor and a worm gear interference-fitted to the output end of the motor;

[0007] A speed reduction transmission mechanism is used to convert the lateral rotational motion output by the power output mechanism into a longitudinal rotational motion, and to link the longitudinal rotational motion to the output gear. The speed reduction transmission mechanism includes a three-stage gear meshing structure. The first-stage gear meshing structure is the meshing of a worm and a helical gear of the first gear, wherein the helix angle of the helical gear of the first gear is equal to the lead angle of the worm. The second-stage gear meshing structure is the meshing of a small gear of the first gear and a large gear of the second gear. The third-stage gear meshing structure is the meshing of a small gear of the second gear and an output gear.

[0008] The three-stage gear meshing consists of a worm and a helical gear meshing of the first gear. The helical gear of the first gear meshes with the worm. This helical gear meshing mechanism can replace the worm gear mechanism. The helical gear is injection molded, simplifying manufacturing and achieving the same transmission characteristics as the worm gear mechanism. The second gear meshes with the output gear.

[0009] The output gear has an output end that extends out of the housing, and the output gear is used to drive the air conditioning unit damper mechanism to rotate;

[0010] A power control mechanism is electrically connected to the power output mechanism;

[0011] An angle sensor is used to detect the rotation angle of the output gear, and the angle sensor is coaxially connected to the output end of the output gear.

[0012] By using a worm gear in conjunction with a first gear and a second gear, power can be transmitted from the motor to the output gear when energized. Because the meshing between the worm gear and the helical gear mechanism is a self-locking design, movement cannot be reversed from the output gear, thus achieving self-locking and reliably stabilizing the air conditioning damper at the required operating angle. This solves the problem of the air conditioning unit actuator rotating in reverse and failing to self-lock when not powered during actual use.

[0013] In addition, the power control mechanism can be a PCB board. An integrated PCB board allows for both controlling the motor's movement and connecting the motor to a power source.

[0014] In addition, the housing includes an upper cover and a lower cover, which are detachably connected.

[0015] In addition, the lower cover has a locking tooth on its outer periphery, and the upper cover has a corresponding locking lug on its outer periphery. The lower cover and the upper cover are fixedly connected by the locking tooth and the locking lug.

[0016] In addition, the upper and lower covers can be connected and fixed in different ways, and can be easily replaced using bolts or the like.

[0017] In addition, the lower cover is provided with a first interface structure, and the upper cover is provided with a second interface structure. When the upper and lower covers are fixedly installed, the first interface structure and the second interface structure combine to form the interface of the housing. The interface can be used to connect the angle sensor and the power control mechanism to the power structure.

[0018] Furthermore, the output gear is a spur gear, which meshes with the pinion of the second gear. The output gear includes a spline sleeve that extends from the housing. The air conditioning damper mechanism is equipped with a spline shaft; by engaging the spline shaft with the spline sleeve, the damper mechanism can be rotated via a motor drive.

[0019] In addition, the first gear and the second gear of the speed reduction transmission mechanism are both double gears, each including a large gear and a small gear;

[0020] In this configuration, the large gear of the first gear meshes with the worm gear. The large gear of the first gear is a helical gear. The helical gear meshing mechanism with the worm gear can replace the traditional worm gear mechanism. The helical gear can be injection molded, simplifying the manufacturing process and achieving the same transmission characteristics as the worm gear mechanism.

[0021] The small gear of the first gear meshes with the large gear of the second gear;

[0022] The pinion of the second gear meshes with the output gear.

[0023] It can achieve three-stage speed reduction through the first gear, the second gear, and the output gear, thereby increasing the transmission ratio and output torque.

[0024] In addition, the housing is provided with a spring plate for limiting the axial displacement of the motor output shaft.

[0025] In addition, the spring sheet can limit the axial displacement of the motor output shaft, thus preventing commutation impact noise when the motor rotation direction changes.

[0026] In addition, gear shafts for the first gear and the second gear are mounted inside the upper cover and the lower cover via the first mounting portion;

[0027] The upper and lower covers are provided with positioning protrusions for fixing the motor.

[0028] The positioning protrusions can be used to position the internal structure of the housing and also serve to fix the motor.

[0029] In addition, the lower cover is provided with a second mounting part for fixing the output gear and the angle sensor.

[0030] The first and second mounting parts can effectively fix the positions of various components inside the housing, and enable the output gear and angle sensor to be installed stably.

[0031] In addition, the lower cover is also provided with a third mounting part for fixing the pins of the angle sensor, and a fourth mounting part for fixing the power control mechanism;

[0032] The pins of the angle sensor extend into the interface through the third mounting portion;

[0033] The pins of the power control mechanism extend into the interface through the fourth mounting part.

[0034] In addition, each pin of the angle sensor is provided with an anti-retraction bump, and the third mounting part is provided with anti-retraction baffles on both sides of the anti-retraction bump. The anti-retraction bumps on the angle sensor are used to fix the pins of the angle sensor, which facilitates connection with external devices and ensures connection stability. Attached Figure Description

[0035] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0036] Figure 1 This is an exploded view of the air conditioning damper actuator of this application;

[0037] Figure 2 The structure of the lower cover of the air conditioning damper actuator of this application. Figure I ;

[0038] Figure 3 The structure of the lower cover of the air conditioning damper actuator of this application. Figure II ;

[0039] Figure 4 This is a corrosion diagram of the lower cover of the air conditioning damper actuator in this application;

[0040] Figure 5 This is a structural diagram of the upper cover of the air conditioning damper actuator of this application;

[0041] Figure 6 This is a schematic diagram of the spline sleeve of the air conditioning damper actuator of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] Lower cover-1, upper cover-2, interface-3, worm gear-4, first gear-5, second gear-6, output gear-7, motor-8, angle sensor-9, power control mechanism-10, spline sleeve-11, spring plate-12, locking tooth-13, locking lug-14, first mounting part-15, positioning protrusion-16, second mounting part-17, third mounting part-18, fourth mounting part-19. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0045] The first embodiment of this application relates to an air conditioning damper actuator. For example... Figure 1 As shown, an air conditioning damper actuator includes a housing and a power output mechanism, a reduction transmission mechanism, an output gear 7, a power control mechanism 10, and an angle sensor 9 fixed within the housing.

[0046] In this embodiment, as Figures 2-5 As shown, the housing includes an upper cover 2 and a lower cover 1, which are detachably connected.

[0047] In this embodiment, the lower cover 1 is provided with a locking tooth 13 on its outer periphery, and the upper cover 2 is provided with a corresponding locking lug 14 on its outer periphery. The lower cover 1 and the upper cover 2 are fixedly connected by the locking tooth 13 and the locking lug 14.

[0048] It is understandable that the upper cover 1 and the lower cover 2 can be connected and fixed in different ways, and can be easily replaced by bolts or other means, as long as they serve the purpose of fixing and installing.

[0049] In this embodiment, the lower cover 1 is provided with a first interface structure, and the upper cover 2 is provided with a second interface structure. When the upper cover 2 and the lower cover 1 are fixedly installed, the first interface structure and the second interface structure are combined to form the interface 3 of the shell.

[0050] The power output mechanism is used to provide power to the output gear 7. The power output mechanism includes a motor 8 and a worm gear 4 sleeved on the output end of the motor 8.

[0051] The housing is equipped with a spring plate 12 to limit the axial displacement of the output shaft of the motor 8, so as to avoid the commutation impact noise caused by the change of axial force of the worm gear (axial movement) when the motor rotates and reverses.

[0052] The upper cover 2 and the lower cover 1 are provided with positioning protrusions 16 for fixing the motor 8.

[0053] The positioning protrusion 16 can position the internal structure of the housing and also serve to fix the motor 8.

[0054] The reduction gear transmission mechanism converts the lateral rotational motion output by the power output mechanism into a longitudinal rotational motion, and then transmits this longitudinal rotational motion to the output gear 7. The reduction gear transmission mechanism includes a three-stage gear meshing structure. The first stage gear meshing structure involves the worm 4 meshing with the helical gear of the first gear 5. The helix angle of the helical gear of the first gear 5 is equal to the lead angle of the worm 4. This helical gear meshing mechanism can replace the worm gear mechanism. The helical gear is injection molded, simplifying manufacturing and achieving the same transmission characteristics as the worm gear mechanism. The second stage gear meshing structure involves the pinion of the first gear 5 meshing with the large gear of the second gear 6. The third stage gear meshing structure involves the pinion of the second gear 6 meshing with the output gear. One end of the output gear 7 is a female output spline sleeve 11, which mates with the male spline shaft of the air conditioning damper rotation mechanism to transmit the rotational motion to the damper rotation mechanism.

[0055] In this embodiment, gear shafts of the first gear 5 and the second gear 6 are mounted inside the upper cover 2 and the lower cover 1 via the first mounting part 15. This enables three-stage speed reduction via the first gear 5, the second gear 6, and the output gear 7, thereby increasing the transmission ratio and output torque.

[0056] In this embodiment, the first gear 5 and the second gear 6 of the speed reduction transmission mechanism are both double gears, each including a large gear and a small gear;

[0057] Among them, the large gear of the first gear 5 is a helical gear that meshes with the worm 4. The helical gear meshing mechanism of the first gear 5 and the worm 4 can replace the worm gear mechanism. The helical gear can be injection molded, simplifying manufacturing and achieving the same transmission characteristics as the worm gear mechanism.

[0058] The small gear of the first gear 5 meshes with the large gear of the second gear 6. The small gear of the first gear 5 is a spur gear, and the large gear of the second gear 6 is a spur gear.

[0059] The pinion of the second gear 6 meshes with the output gear 7. The pinion of the second gear 6 is a spur gear, and all of them are spur gears meshing.

[0060] By using the worm gear 4 in conjunction with the first gear 5 and the second gear 6, power can be transmitted from the motor to the output gear 7 when energized. Because the meshing between the worm gear 4 and the helical gear mechanism is a self-locking design, the movement cannot be reversed by the output gear, thus achieving self-locking and reliably stabilizing the air conditioning damper at the required operating angle. This solves the problem that the air conditioning unit actuator would rotate in reverse and fail to self-lock when not powered during actual use.

[0061] The output gear 7 has an output end that extends out of the housing, and the output gear 7 is used to drive the air conditioning unit damper mechanism to rotate.

[0062] In this embodiment, the output gear 7 is a spur gear, which meshes with the pinion of the second gear 6. The output gear 7 includes a spline sleeve 11, which extends from the housing. The air conditioning damper rotation mechanism is equipped with a spline shaft. By connecting the spline shaft to the spline sleeve 11, the air conditioning mode can be adjusted by driving the rotation of the air conditioning damper through the motor 8.

[0063] It is understandable that, such as Figure 6 As shown, the specific structure of the spline shaft and spline sleeve 11 can be any shape or have different models and numbers of teeth, as long as the relevant function can be achieved. In this application, a six-lobed structure is adopted. The line connecting the point of each lobe farthest from the center of the spline sleeve 11 shaft to the center of the spline sleeve 11 has an included angle of 60° between the lines connecting two adjacent lobes. In the six-lobed structure, there is a pair of adjacent lobes with a straight connection, and the other lobes are connected by an arc.

[0064] In this embodiment, the lower cover 1 is provided with a second mounting part 17 for fixing the output gear 7 and the angle sensor 9.

[0065] In this embodiment, the other end of the output gear 7 is a semi-circular cylindrical structure connected to the angle sensor 9 to monitor the current angle of the damper mechanism in real time. The angle sensor 9 is used to detect the rotation angle of the output gear 7, and the angle sensor 9 is coaxially connected to the output end of the output gear 7.

[0066] By using the worm gear 4 in conjunction with the first gear 5 and the second gear 6, power can be transmitted from the motor 8 to the output gear 7 when energized. Because the meshing between the worm gear 4 and the helical gear mechanism is a self-locking design, the movement cannot be reversed by the output gear 7, thus achieving self-locking and reliably stabilizing the air conditioning damper at the required operating angle. This solves the problem that the air conditioning unit actuator would rotate in reverse and fail to self-lock when not powered during actual use.

[0067] In this embodiment, the lower cover 1 is also provided with a third mounting part 18 for fixing the pins of the angle sensor 9, and a fourth mounting part 19 for fixing the power control mechanism 10.

[0068] The pins of the angle sensor 9 extend into the interface 3 through the third mounting part 18;

[0069] The power control mechanism 10 is electrically connected to the power output mechanism, and the pins of the power control mechanism 10 extend into the interface 3 through the fourth mounting part 19.

[0070] The power control mechanism 10 can be a PCB board. The integrated PCB board can control the movement of the motor 8 and connect the motor 8 to the power supply.

[0071] In this embodiment, each pin of the angle sensor is provided with an anti-retraction bump, and the third mounting part 18 is provided with anti-retraction baffles on both sides of the anti-retraction bump. The anti-retraction bumps provided on the angle sensor 9 are used to fix the pins of the angle sensor 9, which facilitates connection with external devices and ensures connection stability.

[0072] In this embodiment, as Figures 1-5 As shown, during installation, the lower cover 1 and the upper cover are opened, the power control mechanism 10 is installed into the fourth mounting part 19, and the pins of the power control mechanism 10 are inserted into the first interface structure through the fourth mounting part 19. The output shaft of the motor 8 is interference-fitted onto the worm gear 4. The motor 8 is installed into the positioning protrusion 16, and the spring plate 12 is installed at the corresponding position on the lower cover 1. The first gear 5 and the second gear 6 are installed onto the gear shaft of the first mounting part 15, so that the helical gear (large gear) of the first gear 5 meshes with the worm gear 4; the small gear of the first gear 5 meshes with the large gear of the second gear 6; the small gear of the second gear 6 meshes with the output gear 7. Then, the output gear 7 and the angle sensor 9 are installed into the second mounting part 17, so that the pins of the angle sensor 9 are inserted into the first interface structure through the fourth mounting part 19. The third mounting part 18 extends into the first interface structure and is finally fixedly connected to the lower cover 1 and the upper cover 2 by the locking teeth 13 and the locking lugs 14. At this time, the first interface structure and the second interface structure combine to form the interface 3 of the housing. The spline sleeve 11 of the output gear 7 extends out from the housing. The air conditioning damper rotation mechanism is equipped with a spline shaft. By locking the spline shaft and the spline sleeve 11 together, the air conditioning damper can be driven by the motor 8 to rotate. The worm gear 4 works in conjunction with the first gear 5 and the second gear 6. When energized, the power can be transmitted from the motor to the output gear 7. Since the meshing between the worm gear 4 and the helical gear mechanism is a self-locking design, the movement cannot be reversed by the output gear to rotate, thus achieving self-locking and reliably stabilizing the air conditioning damper at the required working angle. This solves the problem that the air conditioning unit actuator will rotate in reverse and cannot self-lock when not energized during actual use.

[0073] This application adopts a worm gear + helical gear meshing mechanism, optimizes the worm gear lead angle, and ensures that the motion can only be transmitted from the motor to the output gear and cannot be transmitted from the output gear back to the motor. It has reliable reverse self-locking performance and can reliably keep the damper stable at the required mode angle for a long time. This application has the characteristics of compact structure, stable transmission, low noise and high reliability.

[0074] Those skilled in the art will understand that the above embodiments are specific implementations of this application, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this application.

Claims

1. An air conditioning damper actuator, characterized in that, include: case; A power output mechanism, fixed inside the housing, is used to provide power to the output gear (7). The power output mechanism includes a motor (8) and a worm gear (4) that is interference-fitted to the output end of the motor (8). The speed reduction transmission mechanism is used to convert the lateral rotational action output by the power output mechanism into a longitudinal rotational action, and to link the longitudinal rotational action to the output gear (7). The speed reduction transmission mechanism includes a three-stage gear meshing structure. The first-stage gear meshing structure is the helical gear meshing of the worm (4) and the first gear (5). The helix angle of the helical gear of the first gear (5) is equal to the lead angle of the worm (4). The second-stage gear meshing structure is the meshing of the pinion of the first gear (5) and the large gear of the second gear (6). The third-stage gear meshing structure is the meshing of the pinion of the second gear (6) and the output gear (7). The output gear (7) has an output end that extends out of the housing, and the output gear (7) is used to drive the air conditioning unit damper mechanism to rotate; The power control mechanism (10) is electrically connected to the power output mechanism; An angle sensor (9) is used to detect the rotation angle of the output gear (7). The angle sensor (9) is coaxially connected to the output end of the output gear (7). The housing includes an upper cover (2) and a lower cover (1), which are detachably connected.

2. The air conditioning damper actuator according to claim 1, characterized in that, The lower cover (1) is provided with a locking tooth (13) on its outer periphery, and the upper cover (2) is provided with a corresponding locking lug (14) on its outer periphery. The lower cover (1) and the upper cover (2) are fixedly connected by the locking tooth (13) and the locking lug (14).

3. The air conditioning damper actuator according to claim 1, characterized in that, The lower cover (1) is provided with a first interface structure, and the upper cover (2) is provided with a second interface structure. When the upper cover (2) and the lower cover (1) are fixedly installed, the first interface structure and the second interface structure are combined to form the interface (3) of the shell.

4. The air conditioning damper actuator according to claim 1, characterized in that, The output gear (7) meshes with the pinion of the second gear (6), and the output gear (7) includes a spline sleeve (11) that extends from the housing.

5. The air conditioning damper actuator according to claim 1, characterized in that, The first gear (5) and the second gear (6) of the speed reduction transmission mechanism are both double gears, each including a large gear and a small gear; Among them, the large gear of the first gear (5) meshes with the worm (4), and the large gear of the first gear (5) is a helical gear; The small gear of the first gear (5) meshes with the large gear of the second gear (6); The pinion of the second gear (6) meshes with the output gear (7).

6. The air conditioning damper actuator according to claim 1, characterized in that, The housing is provided with a spring plate (12) for limiting the axial displacement of the output shaft of the motor (8).

7. The air conditioning damper actuator according to claim 1, characterized in that, The gear shafts of the first gear (5) and the second gear (6) are mounted inside the upper cover (2) and the lower cover (1) via the first mounting part (15); The upper cover (2) and the lower cover (1) are provided with positioning protrusions (16) for fixing the motor (8).

8. The air conditioning damper actuator according to claim 1, characterized in that, The lower cover (1) is provided with a second mounting part (17) for fixing the output gear (7) and the angle sensor (9).

9. The air conditioning damper actuator according to claim 3, characterized in that, The lower cover (1) is also provided with a third mounting part (18) for fixing the pin of the angle sensor (9) and a fourth mounting part (19) for fixing the power control mechanism (10). The pins of the angle sensor (9) extend into the interface (3) through the third mounting part (18); The pins of the power control mechanism (10) extend into the interface (3) through the fourth mounting part (19).

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