Self-locking 5nm air valve actuator

Abstract

The utility model provides a self-locking 5nm air valve actuator, which belongs to the technical field of air valves, comprises a motor, a transmission mechanism and a gear box, and is characterized in that the motor is positioned outside the gear box, the output end of the gear box is fixedly connected with the transmission mechanism, and the output end of the gear box is fixedly connected with the transmission mechanism. The transmission mechanism is located in the gearbox, and the output end of the transmission mechanism is an output shaft of the actuator. The transmission mechanism comprises a motor gear, a second large gear, a second small gear and a third gear, the motor gear is fixedly connected with an output shaft of the motor, the motor gear is meshed with the second large gear, the second large gear is coaxial with the second small gear, the second small gear is meshed with the third gear, and the third gear is coaxial with the second small gear. The third gear is coaxial with an output shaft of the actuator; the problem that self-locking force is insufficient under the condition that the speed ratio of a gear box of the actuator is small can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air valves, and specifically relates to a self-locking 5nm air valve actuator. Background Art

[0002] The damper actuator is an automated device used to control dampers in air conditioning, ventilation and air handling systems. It is usually composed of a motor, a transmission mechanism and a control circuit. The function of the damper actuator is to adjust the opening and closing of the damper through the control circuit according to the signal from the temperature, humidity, pressure or other sensors, so as to realize the temperature regulation and ventilation control of the air conditioning system.

[0003] Specifically, when the air conditioning system needs to adjust the indoor temperature, the control system will send instructions to the air valve actuator, and the actuator will control the motor to start or stop according to the instructions, and drive the air valve to open or close through the transmission mechanism. In this way, the air flow can be accurately adjusted, thereby achieving indoor temperature control and air circulation adjustment.

[0004] Damper actuators usually have certain control functions, such as opening control, feedback monitoring, manual operation, etc., to meet different application requirements. They are widely used in various air conditioning and ventilation systems in buildings, factories, offices and commercial places, providing users with comfortable indoor environment and energy-saving air conditioning solutions.

[0005] When the actuator motor speed is the same, the smaller the speed ratio of the actuator's gearbox, the faster the output shaft rotates. However, the small speed ratio causes the actuator to be unable to lock after it stops, causing the output shaft end to rotate and the air valve to close again, that is, the actuator's self-locking force is insufficient. Utility Model Content

[0006] In view of this, the utility model provides a self-locking 5nm air valve actuator, which can solve the problem of insufficient self-locking force when the gear box speed ratio of the actuator is small.

[0007] The utility model is achieved in this way:

[0008] The utility model provides a self-locking 5nm air valve actuator, comprising a motor, a transmission mechanism, and a gear box, wherein the motor is located outside the gear box, the output end of the gear box is fixedly connected to the transmission mechanism, the transmission mechanism is located inside the gear box, and the output end of the transmission mechanism is the output shaft of the actuator;

[0009] The transmission mechanism includes a motor gear, a second large gear, a second small gear, and a third gear, wherein the motor gear is fixedly connected to the output shaft of the motor, the motor gear is meshed with the second large gear, the second large gear is coaxial with the second small gear, the second small gear is meshed with the third gear, and the third gear is coaxial with the output shaft of the actuator;

[0010] A friction block is also provided on the shaft where the second large gear and the second small gear are located. The friction block is located between the second large gear and the second small gear. A torsion spring is wrapped around the outside of the friction block. The second large gear and the second small gear are prevented from returning by the friction block and the torsion spring.

[0011] On the basis of the above technical solution, a self-locking 5nm air valve actuator of the utility model can also be improved as follows:

[0012] Wherein, a square protrusion is provided at the bottom of the second large gear, and the protrusion is embedded in the end of the torsion spring. The surface of the friction block inside the torsion spring is provided with a plurality of recesses for accommodating the torsion spring.

[0013] Furthermore, the depression on the surface of the friction block is arc-shaped, which has the same bending arc as the end of the torsion spring.

[0014] Furthermore, the friction block is fixedly connected to the shaft where the second large gear and the second small gear are located.

[0015] Furthermore, the included angle of the end of the torsion spring is 60°.

[0016] Furthermore, the width of the protrusion at the bottom of the second large gear is equal to two-thirds of the distance of the torsion spring.

[0017] Furthermore, there are three depressions on the surface of the friction block.

[0018] Compared with the prior art, the beneficial effects of the self-locking 5nm air valve actuator provided by the utility model are:

[0019] This utility model is about the description of a self-locking 5nm air valve actuator, which has the following beneficial effects:

[0020] Self-locking performance: The design of friction block and torsion spring realizes the self-locking function of the actuator, ensuring that the actuator can self-lock when the motor power supply is stopped, preventing the malfunction or accidental movement of the air valve, thus improving the safety and stability of the system;

[0021] Simple and reliable structure: The transmission mechanism adopts a relatively simple gear transmission structure. The addition of friction blocks and torsion springs makes the system structure more compact, reduces the number of parts, and improves the reliability and stability of the system;

[0022] Energy saving: Since the actuator can self-lock after the power supply is stopped, no additional energy is needed to maintain the position of the actuator, thus saving energy consumption and improving the energy utilization rate of the system;

[0023] Precise control: Through optimized design, a reasonable match between the friction block and the torsion spring is achieved, so that the actuator can accurately control the opening and closing of the air valve during operation, improving the control accuracy and stability of the system.

[0024] In general, this utility model self-locking 5nm air valve actuator has the beneficial effects of simple and reliable structure, good self-locking performance, energy saving, precise control, etc. It is suitable for air valve control systems that require high-precision control and high stability requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of a self-locking 5nm air valve actuator;

[0027] Figure 2 A schematic diagram of a friction block of a self-locking 5nm air valve actuator;

[0028] Figure 3 It is a cross-sectional view of a self-locking 5nm damper actuator;

[0029] Figure 4 It is a schematic diagram of the transmission mechanism of a self-locking 5nm air valve actuator;

[0030] Figure 5 This is a self-locking principle diagram of the transmission mechanism of a self-locking 5nm air valve actuator;

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 1. Motor; 2. Transmission mechanism; 21. Motor gear; 221. Second large gear; 222. Second small gear; 223. Friction block; 2231. Torsion spring; 23. Third gear; 3. Gear box. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the implementation mode of the present invention clearer, the technical solution in the implementation mode of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the implementation mode of the present invention.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, it is a first embodiment of a self-locking 5nm air valve actuator provided by the utility model. In this embodiment, it includes a motor 1, a transmission mechanism 2, and a gear box 3, wherein the motor 1 is located outside the gear box 3, the output end of the gear box 3 is fixedly connected to the transmission mechanism 2, the transmission mechanism 2 is located inside the gear box 3, and the output end of the transmission mechanism 2 is the output shaft of the actuator;

[0035] The transmission mechanism 2 includes a motor gear 21, a second large gear 221, a second small gear 222, and a third gear 23. The motor gear 21 is fixedly connected to the output shaft of the motor 1, the motor gear 21 is meshed with the second large gear 221, the second large gear 221 is coaxial with the second small gear 222, the second small gear 222 is meshed with the third gear 23, and the third gear 23 is coaxial with the output shaft of the actuator;

[0036] A friction block 223 is also provided on the shaft where the second large gear 221 and the second small gear 222 are located. The friction block 223 is located between the second large gear 221 and the second small gear 222. A torsion spring 2231 is wrapped around the outside of the friction block 223. The second large gear 221 and the second small gear 222 are prevented from returning by the friction block 223 and the torsion spring 2231.

[0037] Among them, in the above technical solution, a square protrusion is provided at the bottom of the second large gear 221, and the protrusion is embedded in the end of the torsion spring 2231. The surface of the friction block 223 inside the torsion spring 2231 is provided with a plurality of recesses for accommodating the torsion spring 2231.

[0038] Furthermore, in the above technical solution, the depression on the surface of the friction block 223 is arc-shaped, which has the same bending arc as the end of the torsion spring 2231 .

[0039] Furthermore, in the above technical solution, the friction block 223 is fixedly connected to the shaft where the second large gear 221 and the second small gear 222 are located.

[0040] Furthermore, in the above technical solution, the angle of the end of the torsion spring 2231 is 60°.

[0041] Furthermore, in the above technical solution, the width of the protrusion at the bottom of the second large gear 221 is equal to two-thirds of the distance of the torsion spring 2231 .

[0042] Furthermore, in the above technical solution, there are three depressions on the surface of the friction block 223 .

[0043] Specifically, the principle of the utility model is:

[0044] 1. During normal operation, the motor gear 21 rotates clockwise, the second small gear 222 rotates counterclockwise, the middle square protrusion pushes the torsion spring 2231 and the second large gear 221 to rotate counterclockwise, and the second large gear 221 drives the third gear 23 group to rotate, opening the damper. At this time, the torsion spring 2231 is forced to loosen the inner side and the friction block 223, and the rotation resistance is small.

[0045] 2. When the motor 1 stops, the output shaft partially rotates, causing the second large gear 221 to rotate clockwise, and the square protrusion at the bottom pushes the torsion spring 2231 and the second small gear 222. At this time, the torsion spring 2231 is subjected to force to wrap the friction block 223 on the inside, and the rotation resistance becomes larger, causing the second large gear 221 to stop rotating, and the self-locking force becomes larger, so that the damper cannot close by itself.

[0046] 3. When the motor 1 rotates counterclockwise, the same principle applies when closing the damper, which can increase the self-locking force. When the motor 1 is stopped, the damper cannot open by itself.

Claims

1. A self-locking 5nm damper actuator, comprising a motor (1), a transmission mechanism (2), and a gear box (3), characterized in that: The motor (1) is located outside the gear box (3), the output end of the gear box (3) is fixedly connected to the transmission mechanism (2), the transmission mechanism (2) is located inside the gear box (3), and the output end of the transmission mechanism (2) is the output shaft of the actuator; The transmission mechanism (2) comprises a motor gear (21), a second large gear (221), a second small gear (222), and a third gear (23); the motor gear (21) is fixedly connected to the output shaft of the motor (1); the motor gear (21) is meshed with the second large gear (221); the second large gear (221) is coaxial with the second small gear (222); the second small gear (222) is meshed with the third gear (23); and the third gear (23) is coaxial with the output shaft of the actuator; A friction block (223) is also provided on the shaft where the second large gear (221) and the second small gear (222) are located. The friction block (223) is located between the second large gear (221) and the second small gear (222). A torsion spring (2231) is wrapped around the outside of the friction block (223). The second large gear (221) and the second small gear (222) are prevented from returning by the friction block (223) and the torsion spring (2231).

2. A self-locking 5nm damper actuator according to claim 1, characterized in that: A square protrusion is provided at the bottom of the second large gear (221), and the protrusion is embedded in the end of the torsion spring (2231). A plurality of recesses for accommodating the torsion spring (2231) are provided on the surface of the friction block (223) inside the torsion spring (2231).

3. A self-locking 5nm damper actuator according to claim 2, characterized in that: The depression on the surface of the friction block (223) is arc-shaped, and has the same bending arc as the end of the torsion spring (2231).

4. A self-locking 5nm damper actuator according to claim 3, characterized in that: The friction block (223) is fixedly connected to the shaft on which the second large gear (221) and the second small gear (222) are located.

5. A self-locking 5nm damper actuator according to claim 4, characterized in that: The included angle of the end of the torsion spring (2231) is 60°.

6. A self-locking 5nm damper actuator according to claim 5, characterized in that: The width of the protrusion at the bottom of the second large gear (221) is equal to two-thirds of the distance of the torsion spring (2231).

7. A self-locking 5nm damper actuator according to claim 6, characterized in that: The friction block (223) has three depressions on its surface.

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