actuator

Abstract

The embodiment of the application relates to the technical field of control valves, and discloses an actuator and an electronic water valve, wherein the actuator comprises a shell, an output shaft, an output gear, a first double gear and a motor. The output shaft is rotationally arranged in the shell; the output gear is rotationally arranged in the shell, and the output gear is sleeved on the output shaft; the first double gear is rotationally arranged in the shell, and the first double gear is meshed with the output gear; and the motor is connected with the first double gear, and the motor can drive the first double gear to rotate relative to the shell, so as to drive the output gear and the output shaft to rotate relative to the shell. In the above manner, the actuator provided by the application can improve transmission efficiency.

Description

Technical Field

[0001] This application relates to the field of control valve technology, and in particular to an actuator. Background Technology

[0002] The actuator is the power source for electronic water valves, primarily used in the thermal management circuits of heat-generating equipment. In related technologies, actuators use brushed motors to drive gear transmission, rotating the valve core and thus controlling the flow direction and flow rate of fluid within the electronic water valve. This achieves heat management in the cooling system, resulting in energy conservation and reduced consumption. However, the primary gear in the actuator often uses a cross-shaft meshing transmission, which has relatively low transmission efficiency. Utility Model Content

[0003] The purpose of this application is to provide an actuator designed to improve its transmission efficiency.

[0004] According to a first aspect of this application, an actuator is provided, comprising:

[0005] case;

[0006] The output shaft is rotatably mounted on the housing.

[0007] An output gear is rotatably disposed within the housing, and the output gear is sleeved on the output shaft;

[0008] A first double gear is rotatably disposed within the housing, and the first double gear meshes with the output gear;

[0009] A motor is connected to the first double gear, and the motor can drive the first double gear to rotate relative to the housing, so as to drive the output gear and the output shaft to rotate relative to the housing.

[0010] Optionally, the first double gear includes a first gear and a second gear, the second gear being coaxially connected to the first gear, the first gear being connected to the motor, and the second gear meshing with the output gear.

[0011] Optionally, the motor includes a stator assembly and a rotor assembly; the stator assembly is fixed to the housing, and the rotor assembly is rotatably disposed in the housing;

[0012] The rotor is connected to the first gear, and the rotor assembly is rotatable relative to the stator assembly to drive the first gear to rotate relative to the housing.

[0013] Optionally, the stator assembly includes a stator shaft, with both ends of the stator shaft respectively connected to the housing;

[0014] The rotor assembly includes a rotor gear rotatably mounted on the stator shaft, and the rotor gear meshes with the first gear.

[0015] Optionally, it further includes a second double gear, which is rotatably disposed within the housing and is connected to the rotor gear and the first gear respectively.

[0016] Optionally, the second double gear includes a third gear and a fourth gear, the fourth gear being coaxially connected to the third gear, the third gear meshing with the rotor gear, and the fourth gear meshing with the first gear.

[0017] Optionally, the housing is provided with a receiving cavity and a communicating hole, the output gear, the first double gear and the motor are respectively disposed in the receiving cavity, the communicating hole is respectively connected to the receiving cavity and the outside of the housing, and one end of the output shaft is rotatably inserted through the communicating hole.

[0018] Optionally, it also includes a sensing component, which is connected to the output shaft and the housing respectively, and is used to sense the rotation angle of the output shaft.

[0019] Optionally, the system also includes a circuit board disposed within the housing, the circuit board being electrically connected to the stator assembly and the sensing assembly, respectively.

[0020] Optionally, the housing includes a first housing and a second housing, the first housing and the second housing are detachably connected, and the first housing and the second housing enclose a receiving cavity, the output gear, the first double gear and the motor are respectively disposed in the receiving cavity, and the output shaft is at least partially disposed in the receiving cavity.

[0021] The beneficial effects of the embodiments of this application are as follows: The actuator involved in this application uses a motor-driven first double gear transmission to rotate the valve core, thereby adjusting the valve opening and controlling the flow direction and flow rate of the fluid in the electronic water valve. Compared with the actuators in related technologies that use cross-shaft meshing gear transmission, the actuator provided in this application uses parallel shaft meshing transmission, which has higher transmission efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0023] Figure 1This is a cross-sectional view of an actuator provided in one embodiment of this application;

[0024] Figure 2 for Figure 1 The exploded view of the actuator structure is shown.

[0025] Figure 3 for Figure 2 The diagram shows the structure of the stator assembly;

[0026] Figure 4 for Figure 1 The diagram shows the wiring diagram between the stator assembly and the circuit board;

[0027] Figure 5 for Figure 1 A schematic diagram showing the relative positions of the rotor assembly and the circuit board;

[0028] Figure 6 for Figure 1 Another wiring diagram of the stator assembly and circuit board is shown;

[0029] Figure 7A for Figure 1 A cross-sectional view of the rotor assembly in the actuator is shown;

[0030] Figure 7B for Figure 7A The exploded view of the rotor assembly is shown.

[0031] Figure 8 for Figure 1 The diagram shows a cross-sectional view of the relative positions of the output shaft, magnetic ring, and circuit board in the actuator. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0033] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0034] In the description of this application, it should be noted that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0035] In the description of this application, it should be noted that the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0036] The technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0037] Please see Figures 1 to 8 One embodiment of this application provides an actuator including a housing 10, an output shaft 20, an output gear 30, a first double gear 40, and a motor 50. The output shaft 20 is rotatably disposed in the housing 10; the output gear 30 is rotatably disposed within the housing 10 and is sleeved on the output shaft 20; the first double gear 40 is rotatably disposed within the housing 10 and meshes with the output gear 30; the motor 50 is connected to the first double gear 40, and the motor 50 can drive the first double gear 40 to rotate relative to the housing 10, thereby causing the output gear 30 and the output shaft 20 to rotate relative to the housing 10.

[0038] In some embodiments, the actuator further includes a sensing component. The sensing component is connected to the output shaft 20 and the housing 10 respectively, and is used to sense the rotation angle of the output shaft 20.

[0039] See also Figure 1 and Figure 2 In some embodiments, the actuator further includes a circuit board 70. The circuit board 70 is disposed within the housing 10 and is electrically connected to the motor 50 and the sensing component. Exemplarily, a control chip is integrated on the circuit board 70, which can be configured to acquire electrical signals collected by the sensing component to obtain the rotation angle of the output shaft 20. Furthermore, a drive circuit is also integrated on the circuit board 70, which is electrically connected to both the motor 50 and the control chip. In some embodiments, a communication module is integrated on the circuit board 70, which is used for communication or electrical connection with external devices.

[0040] For housing 10, such as Figure 1 and Figure 2 As shown, in some embodiments, the housing 10 has a receiving cavity 10a and a communicating hole 101, the communicating hole 101 connecting the receiving cavity 10a and the outside of the housing 10 respectively. Specifically, the housing 10 includes a first housing 110 and a second housing 120. The first housing 110 and the second housing 120 are detachably connected, and the first housing 110 and the second housing 120 enclose the receiving cavity 10a. The output gear 30, the first double gear 40, the second double gear 80 and the motor 50 are respectively disposed in the receiving cavity 10a, and at least a portion of the output shaft 20 is disposed in the receiving cavity 10a. The first housing 110 has the aforementioned communicating hole 101, and one end of the output shaft 20 is rotatably inserted through the communicating hole 101.

[0041] For example, the first housing 110 and the second housing 120 may be connected by, but not limited to, sealing gaskets to prevent dust or liquid from entering the containment cavity 10a and affecting the normal operation of electronic devices such as the circuit board 70.

[0042] Continue as Figure 2 As shown, the second housing 120 has a connector 1201 for inserting external devices. The connector 1201 has pins for electrical connection of the external devices. The pins extend into the receiving cavity 10a and are electrically connected to the circuit board 70. Furthermore, to facilitate the assembly and fixing of the first double gear 40 and the second double gear 80, two connecting posts protrude from the surface of the second housing 120 facing the receiving cavity 10a. A double gear passes through one of the connecting posts and can rotate around the connecting post.

[0043] For motor 50, such as Figure 2 As shown, in some embodiments, the motor 50 includes a stator assembly 501 and a rotor assembly 502. The stator assembly 501 is fixed to the housing 10, and the rotor assembly 502 is rotatably disposed on the housing 10. The rotor assembly 502 is connected to a first double gear 40, and the rotor assembly 502 can rotate relative to the stator assembly 501 to drive the first double gear 40 to rotate relative to the housing 10.

[0044] Please combine Figure 3 , Figure 6 See also Figure 1In some embodiments, the stator assembly 501 includes a stator shaft 5011, a stator core 5012, and a coil winding 5013 wound on the stator core 5012. The two ends of the stator shaft 5011 are respectively connected to the housing 10. The stator core 5012 is fixed to one end of the stator shaft 5011 and has stator slots. A portion of the coil winding 5013 is housed within the stator slots. The lead wires of the coil winding 5013 are electrically connected to the circuit board 70. By passing current through the coil winding 5013, a rotating magnetic field can be formed around the stator core 5012 to drive the rotor assembly 502 to rotate. When the rotor assembly 502 rotates, the motor 50 can output torque.

[0045] For example, the stator core 5012 includes a plurality of silicon steel sheets. The plurality of silicon steel sheets are stacked along the axial direction of the stator shaft 5011, and the plurality of silicon steel sheets are provided with the aforementioned stator slots, and a portion of the coil winding 5013 is accommodated in the plurality of stator slots. Each silicon steel sheet has a through shaft hole, and the stator shaft 5011 passes through the shaft hole of each silicon steel sheet and the silicon steel sheets are interference-fitted. The two opposite ends of the stator shaft 5011 are respectively provided with chamfered portions, and the two chamfered portions extend out of the plurality of silicon steel sheets and are respectively embedded in the top wall and bottom wall of the housing 10.

[0046] For example, the coil winding 5013 is a three-phase coil winding, and the lead wires of each phase coil winding are soldered and fixed to the solder points on the circuit board 70. The solder points on the circuit board 70 are spaced circumferentially around the notch. Of course, the wiring method of each coil winding is not limited to this; for example, ... Figure 6 As shown, in some other embodiments, after the winding of each phase coil is completed, the lead wires of each phase coil winding are wound and fixed to the terminal block on each coil winding, and then the terminal block is inserted into the through hole on the circuit board 70 and soldered to fix it. This assembly is more efficient and more conducive to mass production.

[0047] Please continue to combine Figure 7A and Figure 7B See also Figure 1 In some embodiments, the rotor assembly 502 includes a rotor 5021 and a rotor gear 5022 coaxially connected to the rotor 5021. The rotor 5021 is rotatably mounted on the stator assembly 501 to generate magnetic flux in the radial direction of the stator assembly 501. The rotor gear 5022 is rotatably mounted on the stator shaft 5011 and meshes with a first double gear 40 to transmit torque from the rotor gear 5022 to the output shaft 20. Along the axial direction of the stator shaft 5011, the rotor gear 5022 is coaxially arranged with the stator core 5012, and along the radial direction of the stator shaft 5011, an air gap is formed between the rotor 5021 and the stator core 5012 to ensure smooth rotation of the rotor 5021 relative to the stator core 5012.

[0048] For example, rotor 5021 is an outer annular permanent magnet, and the magnetic poles of any two adjacent sectors on rotor 5021 are in opposite directions. Rotor gear 5022 is an injection molded part, integrally injection molded with rotor 5021. By injection molding rotor gear 5022 and rotor 5021 into one piece, rotor 5021 is rotatably mounted on stator assembly 501 via rotor gear 5022, ensuring reliable connection between rotor gear 5022 and rotor 5021.

[0049] In practice, the rotor assembly 502 and the stator assembly 501 are fixed together to the housing 10 by the same stator shaft 5011. That is, the rotor gear 5022 has a shaft hole, a bearing is installed in the shaft hole, and the stator shaft 5011, which passes through the stator core 5012, passes through the bearing again and is embedded in the top wall of the housing 10.

[0050] In some embodiments, continue as follows Figure 7B As shown, the inner peripheral wall of the rotor 5021 is provided with multiple tooth grooves, and the rotor gear 5022 is provided with multiple teeth protruding from its end face. The multiple teeth are housed in the multiple tooth grooves one by one, thereby further improving the connection reliability between the output gear 30 and the rotor 5021.

[0051] For sensing components, such as Figure 8 As shown, in some embodiments, the sensing component includes a magnetic ring 601 and a sensing element (not shown). The magnetic ring 601 is connected to the output shaft 20, and the sensing element is integrated into the circuit board 70. The output shaft 20 can drive the magnetic ring 601 to rotate synchronously, and the sensing element is used to sense the rotation angle of the magnetic ring 601.

[0052] Specifically, the circuit board 70 has a clearance hole 701, and one end of the output shaft 20 passes through the clearance hole 701 and is rotatably mounted on the bottom wall of the housing 10. The shape of the clearance hole 701 matches the shape of the magnetic ring 601. The magnetic ring 601 is sleeved on one end of the output shaft 20 and located inside the clearance hole 701. The output shaft 20 can drive the magnetic ring 601 to rotate synchronously.

[0053] For example, the magnetic ring 601 is one of a single-pole magnetic ring 601, a multi-pole magnetic ring 601, or a multi-track magnetic ring 601, to facilitate the collection of electrical signals by the sensing element. The sensing element is a sensitive element whose characteristic parameters change significantly with the magnetic quantity of the magnetic ring 601, such as a Hall effect sensor. There are at least two sensing elements, both integrated on the circuit board 70 and electrically connected to the control unit. The at least two sensing elements are arranged around the magnetic ring 601, with equal spacing between them, and each sensing element is equidistant from the magnetic ring 601, to facilitate the acquisition of electrical signals from the magnetic ring 601 and reduce errors.

[0054] Alternatively, in some embodiments, the sensing component includes a magnetic encoding chip integrated on the circuit board 70 and electrically connected to the control chip. The magnetic encoding chip is disposed opposite to a portion of the rotor 5021 along the axial direction of the stator core 5012, or opposite to a portion of the outer peripheral surface of the rotor 5021 along the radial direction of the stator core 5012. The magnetic encoding chip senses the changing magnetic field on the end face or outer peripheral surface of the rotor 5021 as it rotates and outputs it to the control chip. The control chip first determines the current position of the rotor 5021 using a software algorithm, and then calculates the current rotation angle of the output shaft 20 using the reduction ratio of the transmission component, thereby achieving precise control of the rotation angle of the output shaft 20.

[0055] For the output gear 30, the first double gear 40, and the rotor gear 5022, such as Figure 1 or Figure 2 As shown, the output gear 30, the first double gear 40, and the rotor gear 5022 are all parallel-axis gears, and the axes of the output gear 30, the first double gear 40, and the rotor gear 5022 are parallel to each other. Specifically, the first double gear 40 includes a first gear 401 and a second gear 402. The second gear 402 is coaxially connected to the first gear 401. The first gear 401 meshes with the output gear 30, and the second gear 402 meshes with the output gear 30. In this application, all gears are parallel-axis gears, resulting in high reverse efficiency. Therefore, the actuator of this application can improve the transmission efficiency of the rotor 5021 from the power input side to the power output side of the first double gear 40. Exemplarily, the first gear is a large gear, and the second gear is a small gear.

[0056] To enhance the torque transmission capability of the actuator, see [link to relevant documentation]. Figure 1 and Figure 2 In some embodiments, the actuator further includes a second double gear 80. The second double gear 80 is rotatably disposed within the housing 10 and connects to the rotor gear 5022 and the first gear 401 respectively. Specifically, the second double gear 80 is also a parallel-axis gear, and its axis is parallel to the axes of the output gear 30, the first double gear 40, and the rotor gear 5022. The second double gear 80 includes a third gear 801 and a fourth gear 802, which are coaxially connected to the third gear 801. The third gear 801 meshes with the rotor gear 5022, and the fourth gear 802 meshes with the first gear 401. Exemplarily, the third gear is a large gear, and the fourth gear is a small gear.

[0057] In summary, the actuator involved in this application uses a motor 50 to drive a first double gear 40, which in turn rotates the valve core to adjust the valve opening, thereby controlling the flow direction and flow rate of the fluid within the electronic water valve. Compared to actuators in related technologies that use cross-shaft meshing gears, the actuator provided in this application uses parallel shaft meshing transmission, resulting in higher transmission efficiency.

[0058] Furthermore, the motor 50 of the actuator provided in this application does not have brushes and a commutator, that is, there is no contact between the brushes and the commutator, which avoids the situation of brush friction in the brushed motor 50, thereby improving the electromagnetic compatibility performance of the actuator.

[0059] Furthermore, within the same volume, the outer rotor 5021 motor 50 has higher torque than the inner rotor 5021 motor 50, requiring a smaller reduction ratio, thus allowing for optimization of the gear transmission structure and further reducing the size of the actuator.

[0060] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An actuator, characterized in that, include: case; The output shaft is rotatably mounted on the housing. An output gear is rotatably disposed within the housing, and the output gear is sleeved on the output shaft; A first double gear is rotatably disposed within the housing, and the first double gear meshes with the output gear; A motor is connected to the first double gear, and the motor can drive the first double gear to rotate relative to the housing, so as to drive the output gear and the output shaft to rotate relative to the housing.

2. The actuator according to claim 1, characterized in that, The first double gear includes a first gear and a second gear, the second gear is coaxially connected to the first gear, the first gear is connected to the motor, and the second gear meshes with the output gear.

3. The actuator according to claim 2, characterized in that, The motor includes a stator assembly and a rotor assembly; the stator assembly is fixed to the housing, and the rotor assembly is rotatably disposed on the housing; The rotor assembly is connected to the first gear, and the rotor assembly is rotatable relative to the stator assembly to drive the first gear to rotate relative to the housing.

4. The actuator according to claim 3, characterized in that, The stator assembly includes a stator shaft, with both ends of the stator shaft connected to the housing. The rotor assembly includes a rotor gear rotatably mounted on the stator shaft, and the rotor gear meshes with the first gear.

5. The actuator according to claim 4, characterized in that, It also includes a second double gear, which is rotatably disposed within the housing and is connected to the rotor gear and the first gear respectively.

6. The actuator according to claim 5, characterized in that, The second double gear includes a third gear and a fourth gear. The fourth gear is coaxially connected to the third gear. The third gear meshes with the rotor gear, and the fourth gear meshes with the first gear.

7. The actuator according to any one of claims 1-6, characterized in that, The housing has a receiving cavity and a connecting hole. The output gear, the first double gear, and the motor are respectively disposed in the receiving cavity. The connecting hole connects the receiving cavity and the outside of the housing. One end of the output shaft is rotatably inserted through the connecting hole.

8. The actuator according to any one of claims 1-6, characterized in that, It also includes a sensing component, which is connected to the output shaft and the housing respectively, and is used to sense the rotation angle of the output shaft.

9. The actuator according to claim 8, characterized in that, It also includes a circuit board disposed within the housing, the circuit board being electrically connected to the stator assembly and the sensing assembly respectively.

10. The actuator according to any one of claims 1-6, characterized in that, The housing includes a first housing and a second housing, which are detachably connected and form a receiving cavity. The output gear, the first double gear, and the motor are respectively disposed in the receiving cavity, and the output shaft is at least partially disposed in the receiving cavity.

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