actuator

Abstract

The embodiment of the application discloses an actuator, which comprises a shell, a circuit board, a stator assembly, a rotor assembly and an output unit. The circuit board is arranged in the shell, the stator assembly is arranged on the circuit board, the rotor assembly is rotatably arranged in the shell, at least part of the output unit is arranged in the shell, the output unit is rotatably connected to the shell, the output unit is connected to the rotor assembly, and the rotor assembly can rotate relative to the stator assembly to drive the output unit to rotate relative to the shell. The motor is formed by the circuit board, the stator assembly and the rotor assembly to drive the output unit to rotate, thereby realizing accurate control of the position of the output unit. The output unit is connected to the valve of the water valve, thereby realizing accurate control of the flow.

Description

Technical Field

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

[0002] With the development of new energy vehicles, the demand for thermal management systems is also increasing. The vehicle's battery, motor, engine, and air conditioning system all require a thermal management system for cooling and heating. Multi-way valves are crucial components in thermal management systems, and the actuators that drive these valves to regulate flow are of paramount importance, requiring precise control. Utility Model Content

[0003] This application provides an actuator to precisely control the position of an output unit, thereby achieving flow regulation.

[0004] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide an actuator, including a housing, a circuit board, a stator assembly, a rotor assembly, and an output unit. The circuit board is disposed inside the housing, the stator assembly is disposed on the circuit board, the rotor assembly is rotatably disposed inside the housing, at least a portion of the output unit is disposed inside the housing, the output unit is rotatably connected to the housing, the output unit is connected to the rotor assembly, and the rotor assembly is rotatable relative to the stator assembly to drive the output unit to rotate relative to the housing.

[0005] In one or more of the above optional embodiments, the stator assembly includes at least one coil, the at least one coil being disposed on the circuit board, and the at least one coil being distributed sequentially along the circumference of the rotor assembly; or, the stator assembly further includes at least one iron core and at least one coil, the at least one iron core being disposed on the circuit board, and the at least one coil being distributed sequentially along the circumference of the rotor assembly, with each coil wound around a corresponding iron core.

[0006] In one or more of the above optional embodiments, the rotor assembly includes a rotor shaft, a first rotor, and a second rotor. The rotor shaft is rotatably connected to the housing. The first rotor and the second rotor are both coaxially fixed to the rotor shaft. The rotor shaft passes through the circuit board, and the circuit board and the stator assembly are both disposed between the first rotor and the second rotor.

[0007] In one or more of the above optional embodiments, the rotor assembly further includes a drive gear connected to the rotor shaft and disposed at the end of the second rotor away from the circuit board, and the drive gear is connected to the output unit.

[0008] In one or more of the above optional embodiments, the output unit includes an output shaft and an output gear, the output shaft is rotatably connected to the housing, the output gear is connected to the output shaft, and the output gear is disposed inside the housing and connected to the drive gear.

[0009] In one or more of the above optional embodiments, the actuator further includes a transmission assembly disposed within the housing, the transmission assembly being connected to the rotor assembly and the output unit respectively.

[0010] In one or more of the above optional embodiments, the transmission component includes a double gear, which is rotatably disposed on the housing and meshes with the drive gear and the output gear respectively.

[0011] In one or more of the above optional embodiments, the double gear includes a main gear, a secondary gear, and a spindle, with both the main gear and the secondary gear sleeved on the spindle; the spindle is rotatably connected to the housing, the main gear meshes with the drive gear, and the secondary gear meshes with the output gear.

[0012] In one or more of the above optional embodiments, the actuator further includes a drive cell disposed on the circuit board and electrically connected to the stator assembly, and / or the actuator includes a position sensor disposed on the circuit board for sensing the position of the output unit.

[0013] In one or more of the above optional embodiments, the housing is provided with at least one positioning step, the circuit board abuts against the at least one positioning step, and / or, the housing is provided with at least one positioning post, the circuit board is provided with at least one positioning hole, and each positioning post passes through a corresponding positioning hole.

[0014] An actuator provided in this application embodiment forms a motor through a circuit board, a stator assembly, and a rotor assembly to drive the output unit to rotate, thereby achieving precise control of the position of the output unit. The output unit is then connected to a water valve to achieve precise control of the flow rate. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0016] Figure 1 This is a perspective view of the actuator provided in the embodiments of this application;

[0017] Figure 2 yes Figure 1 The exploded view of the actuator shown;

[0018] Figure 3 yes Figure 1 The figure shows a cross-sectional view of the actuator.

[0019] Figure 4 yes Figure 2 The diagram shows the installation of the stator assembly and circuit board in the actuator.

[0020] Figure 5 yes Figure 2 The diagram shows the installation of the stator assembly and circuit board in the actuator.

[0021] Figure 6 yes Figure 2 The diagram shows the structure of the first housing in the actuator.

[0022] Figure 7 yes Figure 6 Enlarged view of point A in the middle;

[0023] Figure 8 yes Figure 2 A schematic diagram showing the installation of the first housing and the circuit board in the actuator shown;

[0024] Figure 9 yes Figure 2 The diagram shows the structure of the rotor assembly in the actuator.

[0025] Figure 10 yes Figure 3 A cross-sectional view of the housing in the actuator shown;

[0026] Figure 11 yes Figure 2 The diagram shows the installation of the circuit board and rotor assembly in the actuator.

[0027] Figure 12 yes Figure 3 The cross-sectional view of the output unit in the actuator shown.

[0028] Figure label:

[0029] Actuator; 10. Housing; 110. First housing; 111. First positioning element; 112. Second positioning hole; 113. Second positioning element; 114. First receiving groove; 115. Third receiving groove;

[0030] 120. Second housing; 121. Second receiving groove; 122. Third through hole;

[0031] 20a, Circuit board; 201a, First through hole; 202a, Second through hole; 210a, First circuit board; 220a, Second circuit board; 221a, First positioning hole;

[0032] 20b, Stator assembly; 210b, First coil; 220b, Iron core; 230b, Second coil;

[0033] 30. Rotor assembly; 310. Rotor shaft; 320. First rotor; 330. Second rotor; 340. Drive gear;

[0034] 40. Output unit; 410. Output shaft; 420. Output gear; 430. Magnet;

[0035] 50. Transmission components;

[0036] 510. Drive shaft; 520. Drive wheel; 521. Main wheel; 522. Secondary wheel;

[0037] 50a. First transmission assembly;

[0038] 510a, First drive shaft;

[0039] 520a, First transmission wheel; 521a, First main wheel; 522a, First auxiliary wheel;

[0040] 50b, Second transmission assembly;

[0041] 510b, Second drive shaft;

[0042] 520b, Second drive wheel; 521b, Second main wheel; 522b, Second auxiliary wheel;

[0043] 50c, Third transmission assembly;

[0044] 510c, Third drive shaft;

[0045] 520c, third drive wheel; 521c, third main wheel; 522c, third auxiliary wheel;

[0046] 60. Locking components;

[0047] 60. Drive cell;

[0048] 80. Position sensor;

[0049] 90a, sealing ring; 90b, charging interface. Detailed Implementation

[0050] It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The term "vertical" and similar expressions used in this specification are for illustrative purposes only.

[0051] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0052] Unless otherwise specified, the term "multiple" in this application refers to two or more.

[0053] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0054] Existing actuator solutions mostly use a brushed motor to drive a gear train, which in turn drives the valve core to rotate, thereby controlling the flow rate of the regulating valve. Furthermore, the primary gear is often a cross-shaft gear transmission, resulting in extremely low transmission efficiency. Some manufacturers also use an internal rotor brushless motor paired with a parallel shaft gear train. The windings in this system are often individually wound onto a plastic frame, and then the stator core is installed to form a stator assembly. The manufacturing process for this stator assembly is complex and costly.

[0055] Therefore, embodiments of this application provide a novel actuator. Please refer to... Figure 1 and Figure 2 , Figure 1 A perspective schematic diagram of the actuator 100 according to an embodiment of this application is shown. Figure 2An exploded view of actuator 100 is shown. Actuator 100 includes housing 10, circuit board 20a, stator assembly 20b, rotor assembly 30, output unit 40, and transmission assembly 50. Housing 10 serves as a load-bearing body to support the internal components. Housing 10 encloses an installation space in which circuit board 20a, stator assembly 20b, rotor assembly 30, transmission assembly 40, and output unit 50 are all installed. Stator assembly 20b is disposed on circuit board 20a, rotor assembly 30 is rotatably disposed within housing 10, and at least a portion of output unit 40 is disposed within housing 10. Output unit 40 is rotatably connected to housing 10 and connected to rotor assembly 30 via transmission assembly 50. Rotor assembly 30 is rotatable relative to stator assembly 20b to drive output unit 40 to rotate relative to housing 10.

[0056] In some embodiments, such as Figure 3 As shown, the housing 10 includes a first housing 110 and a second housing 120, which are interlocked to form the aforementioned installation space.

[0057] In some embodiments, such as Figure 2 As shown, the first housing 110 and the second housing 120 are detachably connected. For example, the first housing 110 and the second housing 120 are connected by snap-fit, or by bolts.

[0058] In some embodiments, the first housing 110 and the second housing 120 are fixedly connected. For example, the first housing 110 and the second housing 120 are glued together.

[0059] In some embodiments, such as Figure 4 As shown, the stator assembly 20b has no iron core. For example, the stator assembly 20b includes at least one first coil 210b, which is disposed on the circuit board 20a and is distributed sequentially along the circumference of the rotor assembly 30. In this case, the first coils 210b are etched on the circuit board 20a, which simplifies the stator winding and assembly process and saves costs.

[0060] In some embodiments, the stator assembly 20b has an iron core, such as... Figure 5 As shown, the stator assembly 20b includes at least one iron core 220b and at least one second coil 230b. The at least one iron core 220b is disposed on the circuit board 20a, and the at least one iron core 220b is distributed sequentially along the circumference of the rotor assembly 30. Each second coil 230b is wound around a corresponding iron core 220b. At this time, the second coil 230b and the iron core 220b are encapsulated on the circuit board 20a by adhesive or epoxy resin.

[0061] This application uses a coreless stator assembly 20b as an example for illustration.

[0062] In some embodiments, such as Figure 4 As shown, circuit board 20a is a PCB board. Circuit board 20a includes a first through hole 201a and a second through hole 202a. The first through hole 201a is used for the rotor shaft 310 of rotor assembly 20b to pass through, and the second through hole 202a is used for the output shaft 410 of output unit 40 to pass through.

[0063] In some embodiments, the circuit board 20a is formed by stacking and bonding one or more rigid integrated PCB boards. In this embodiment, the circuit board 20a includes a first circuit board 210a and a second circuit board 220a, which are stacked and bonded along the axial direction of the rotor shaft 310. The first circuit board 20a is close to the first housing 110, and the second circuit board 220a is close to the second housing 120. A first coil 210b is etched on both the first circuit board 210a and the second circuit board 220a.

[0064] In some embodiments, the cross-sectional area of ​​the second circuit board 220a is larger than that of the first circuit board 210a. The first through hole 201a penetrates both the first circuit board 210a and the second circuit board 220a, and the second through hole 202a is provided in the second circuit board 220a. The first through hole 201a is not limited to a circular hole; it can be any hole that allows the rotor shaft 310 to pass through. The second through hole 202a is similar and will not be described in detail here.

[0065] In some embodiments, such as Figure 6 As shown, the first housing 110 includes at least one first positioning member 111. The first positioning member 111 is disposed on the side of the first housing 110 near the second housing 120. The second circuit board 220a of the circuit board 20a is placed on the first positioning member 111 to support and initially position the circuit board 20a.

[0066] In some embodiments, such as Figure 7 As shown, the first positioning member 111 is an L-shaped positioning step. Specifically, the first positioning member 111 includes a first positioning part 111a and a second positioning part 111b connected to each other. The first positioning part 111a and the second positioning part 111b are perpendicular to each other. The first positioning part 111a is used to support the second circuit board 220a, and the second positioning part 111b is used to limit the position of the second circuit board 220a.

[0067] In this embodiment of the application, the number of first positioning elements 111 is 4, and the 4 first positioning elements 111 are distributed in the first housing 110.

[0068] In some embodiments, such as Figure 8As shown, the actuator 100 includes a locking member 60, and the second circuit board 220a is fixed to the first housing 110 by the locking member 60. For example, the locking member 60 is a snap-fit, which is provided on the first housing 110 and extends from the first housing 110 to the second housing 120. After the circuit board 20a is placed on the first positioning member 111, it is locked to the first housing 110 by the snap-fit.

[0069] In some embodiments, the locking member 60 is a screw. Specifically, the second circuit board 220a has at least a first positioning hole 221a, and the first housing 110 has at least one second positioning hole 112. The second positioning hole 112 corresponds to the first positioning hole 221a. The locking member 60 passes through the first positioning hole 221a and the second positioning hole 112 in sequence and is then tightened to achieve a fixed connection between the circuit board 20a and the first housing 110. It can be understood that both the first positioning hole 221a and the second positioning hole 112 are threaded holes.

[0070] In some embodiments, such as Figure 6 As shown, the first housing 110 includes at least one second positioning member 113, which extends from the first housing 110 toward the second housing 120, and a second positioning hole 112 is provided in the second positioning member 113. At this time, the second positioning member 113 and the first positioning member 111 together support the circuit board 20a.

[0071] In some embodiments, the height of the second positioning member 113 is the same as the height of the first positioning part 111a in the direction extending from the first housing 110 to the second housing 120.

[0072] In some embodiments, the second positioning element 113 is a positioning post.

[0073] In some embodiments, the locking member 60 is a nut, and the second positioning member 113 is a positioning post. For example, each second positioning member 113 passes through a first positioning hole 221a, and the outer periphery of the second positioning member 113 is provided with external threads. The locking member 60 is threadedly connected to the second positioning member 113 to achieve a fixed connection between the circuit board 20a and the housing 110.

[0074] In some embodiments, such as Figure 9As shown, the rotor assembly 30 includes the aforementioned rotor shaft 310, a first rotor 320, and a second rotor 330. The rotor shaft 310 passes through the aforementioned circuit board 20a. Specifically, the rotor shaft 310 passes through the first through hole 201a and is rotatably connected to the housing 10. The first rotor 320 and the second rotor 330 are both coaxially fixed to the rotor shaft 310. The circuit board 20a and the stator assembly 20b are both located between the first rotor 320 and the second rotor 330, and there is a first gap g1 between the first rotor 320 and the circuit board 20a, and a second gap g2 between the second rotor 330 and the circuit board 20a. By placing the circuit board 20a and the stator assembly 20b between the first rotor 320 and the second rotor 330, the stator assembly 20b and the rotor assembly 30 form a disc motor, shortening the axial dimension of the actuator 100.

[0075] In some embodiments, the rotor shaft 310 of the rotor assembly 30 is rotatably connected to the housing 10. Specifically, as Figure 10 As shown, the first housing 110 and the second housing 120 are respectively provided with a first receiving groove 114 and a second receiving groove 121. The two ends of the rotor shaft 310 are respectively received in the first receiving groove 114 and the second receiving groove 121, and the rotor shaft 310 can rotate in the first receiving groove 114 and the second receiving groove 121.

[0076] In some embodiments, the first housing 110 includes a first boss with a hole forming a first receiving groove 114, which can limit the rotor shaft 310. The second receiving groove 121 is similarly positioned.

[0077] In some embodiments, the rotor assembly 30 further includes a drive gear 340 (such as...). Figure 9 As shown, the drive gear 340 is connected to the end of the second rotor 330 away from the circuit board 20a. The drive gear 340 is coaxially fixed to the rotor shaft 310 and can rotate together with the rotor shaft 310. The drive gear 340 is rotatably connected to the output shaft 410 of the output unit 40 via the transmission assembly 50. The arrangement of the drive gear 340 facilitates the rotatable connection between the second rotor 330 and the output shaft 410 of the output unit 40.

[0078] In some embodiments, a drive cell 70 (such as...) is integrated on the circuit board 20a. Figure 4 As shown in the figure, the drive cell 70 is electrically connected to the first coil 210b to control the direction and magnitude of the current flowing through the first coil 210b, thereby facilitating the adjustment of the water valve flow rate.

[0079] In some embodiments, both the first rotor 320 and the second rotor 330 are metal conductors (without permanent magnets). When the circuit board 20a is powered on, the drive cell 70 controls the current to pass through the first coil 210b, generating a magnetic field in the first gap g1 and the second gap g2 to cut the metal conductor and generate a Lorentz force to drive the first rotor 320 and the second rotor 330 to rotate, thereby driving the output shaft 410 of the output unit 40 to rotate via the transmission assembly 50.

[0080] In some embodiments, both the first rotor 320 and the second rotor 330 are permanent magnets. When the circuit board 20a is powered on, the drive cell 70 controls the current to pass through the first coil 210b, generating a magnetic field in the first gap g1 and the second gap g2. The permanent magnets are attracted or repelled by the magnetic field, driving the first rotor 320 and the second rotor 330 to rotate, thereby driving the output shaft 410 of the output unit 40 to rotate via the transmission assembly 50.

[0081] In some embodiments, the first rotor 320, the second rotor 330, and the drive gear 340 are all interference-fitted with the rotor shaft 310.

[0082] In some embodiments, the rotor shaft 310, the drive gear 340, and the second rotor 330 are integrally formed.

[0083] In some embodiments, such as Figure 2 and Figure 3 As shown, the output unit 40 includes the aforementioned output shaft 410 and output gear 420. The output shaft 410 passes through the second through hole 202a and is rotatably connected to the housing 10. The output shaft 410 is parallel to the rotor shaft 310, and the output gear 420 is connected to the output shaft 410. Specifically, the output gear 420 is disposed inside the housing 10 and coaxially fixed to the output shaft 410, and the output gear 420 can rotate together with the output shaft 410. The drive gear 340 is rotatably connected to the output gear 420 via the transmission assembly 50. One end of the output shaft 410 is exposed outside the housing 10 and connected to the water valve. The arrangement of the output gear 420 facilitates the rotatable connection between the output shaft 410 and the drive gear 340. By adopting parallel shaft transmission and setting the transmission assembly 50 between the output shaft 410 and the rotor assembly 30, the reliability and efficiency of the transmission are improved.

[0084] In some embodiments, the number of teeth of the output gear 420 is greater than the number of teeth of the drive gear 340, which is beneficial for achieving high torque at low speed.

[0085] In some embodiments, such as Figure 10 As shown, the first housing 110 is provided with a third receiving groove 115, and the second housing 120 is provided with a third through hole 122. The two ends of the output shaft 410 are respectively received in the third receiving groove 115 and the third through hole 122, and the output shaft 410 can rotate in the third receiving groove 115 and the third through hole 122.

[0086] In some embodiments, one end of the output shaft 410 is exposed outside the housing 10 through the third through hole 122. For example, one end of the output shaft 410 extends out of the housing 10 through the third through hole 122. Alternatively, one end of the output shaft 410 is disposed within the third through hole 122, and along the direction of extension from the first rotor 320 to the second rotor 330, the surface of the end of the output shaft 410 exposed outside the housing 10 is lower than the outer surface of the second housing 120.

[0087] It is understandable that the output shaft 410 can also extend out of the housing 10 through the third through hole 122.

[0088] In some embodiments, such as Figure 3 and Figure 4 As shown, a magnet 430 is provided on the output shaft 410, and a position sensor 80 is integrated on the circuit board 20a. The position sensor 80 is used to sense the position of the output gear 420, that is, the position sensor 80 is used to sense the rotation angle of the output gear 420 to control the position of the output gear 420. At this time, the position sensor 80 is positioned close to the magnet 430. It should be noted that when the first rotor 320 and the second rotor 330 are permanent magnets, the magnet 430 can be omitted, such as... Figure 11 As shown, the position sensor 80 is located near the first rotor 320 or the second rotor 330 to sense the changing magnetic field of the outer circular surface of the permanent magnet as it rotates. The position of the permanent magnet is determined by a software algorithm, and the rotation angle of the output gear 420 is calculated using the transmission ratio, thereby achieving precise control of the position of the output gear 420. By integrating the drive cell 70 and the position sensor 80 onto the circuit board 20a, wiring is simplified, assembly complexity is reduced, and costs are lowered. Furthermore, precise control of the position of the output gear 420 allows for adjustment of the water valve position, thus achieving flow regulation.

[0089] In some embodiments, such as Figure 12 As shown, the output shaft 410 is provided with a shoulder 411, and the magnet 430 is a magnetic ring, which is sleeved on the output shaft 410 and abuts against the shoulder 411.

[0090] In some embodiments, the output shaft 410, the output gear 420, and the magnet 430 are integrally formed.

[0091] In some embodiments, such as Figure 2 and Figure 3As shown, the transmission assembly 50 connects the rotor assembly 30 and the output unit 40 respectively. Specifically, the transmission assembly 50 includes a spindle 510 and a transmission wheel 520 sleeved on the spindle 510. The spindle 510 is parallel to the rotor shaft 310. The transmission wheel 520 is a double gear, including a main wheel 521 and a secondary wheel 522. The main wheel 521 meshes with the drive gear 340, and the secondary wheel 522 meshes with the output gear 410. The number of teeth on the main wheel 521 is greater than the number of teeth on the secondary wheel 522, and the number of teeth on the main wheel 521 is greater than the number of teeth on the drive gear 340. The number of teeth on the output gear 410 is greater than the number of teeth on the secondary wheel 522. By setting the transmission assembly 50, the problems of the output gear 420 being too large, having high manufacturing costs, occupying too much space in the actuator 100, and making the actuator 100 structure non-compact and too bulky due to direct meshing with the drive gear 340 can be reduced.

[0092] In some embodiments, the spindle 510 is rotatably connected to the housing 10, and the transmission wheel 520 is interference-fitted with the spindle 510. For example, the first housing 110 and the second housing 120 are respectively provided with a fourth receiving groove and a fifth receiving groove, and the two ends of the spindle 510 are respectively received in the fourth receiving groove and the fifth receiving groove, and the spindle 510 can rotate in the fourth receiving groove and the fifth receiving groove.

[0093] In some embodiments, the spindle 510 is integrally formed with the first housing 110, and the transmission wheel 520 is clearance-fitted with the spindle 510. For example, the second housing 120 is provided with a fourth receiving groove, the spindle 510 is received in the fourth receiving groove, and the transmission wheel includes an upper shoulder and a lower shoulder. The upper shoulder is located at the end of the main wheel away from the secondary wheel, and the lower shoulder is located at the end of the secondary wheel away from the main wheel. The upper shoulder is used to cooperate with the fourth receiving groove to limit the transmission wheel 520 to an upper limit, and the lower shoulder is used to cooperate with the first housing 110 to limit the transmission wheel 520 to a lower limit, thereby achieving axial limiting of the transmission wheel 520. Further, elastic elements are provided between the fourth receiving groove and the upper shoulder, and between the lower shoulder and the first housing. The elastic elements include one or more of the following: an elastic retaining ring, a PTFE retaining ring, and a wave spring.

[0094] In some embodiments, the transmission assembly 50 is a three-stage transmission assembly, each stage of which includes the aforementioned spindle 510 and transmission wheel 520. For ease of description, the three stages of the transmission assembly 50 are defined as a first transmission assembly 50a, a second transmission assembly 50b, and a third transmission assembly 50c, that is, the transmission assembly 50 includes a first transmission assembly 50a, a second transmission assembly 50b, and a third transmission assembly 50c.

[0095] The first transmission assembly 50a includes a first spindle 510a and a first transmission wheel 520a sleeved on the first transmission shaft. The first transmission wheel 520a includes a first main wheel 521a and a first auxiliary wheel 522a, with the number of teeth on the first main wheel 521a being greater than the number of teeth on the first auxiliary wheel 522a. The second transmission assembly 50b includes a second spindle 510b and a second transmission wheel 520b sleeved on the second transmission shaft. The second transmission wheel 520b includes a second main wheel 521b and a second auxiliary wheel 522b, with the number of teeth on the second main wheel 521b being greater than the number of teeth on the second auxiliary wheel 522b. The third transmission assembly 50c includes a third spindle 510c and a third transmission wheel 520c sleeved on the third spindle 510c. The third transmission wheel 520c includes a third main wheel 521c and a third auxiliary wheel 522c, with the number of teeth on the third main wheel 521c being greater than the number of teeth on the third auxiliary wheel 522c. Specifically, the drive gear 340 meshes with the first main gear 521a, the first auxiliary gear 522a meshes with the second main gear 521b, the second auxiliary gear 522b meshes with the third main gear 521c, and the third auxiliary gear 522c meshes with the output gear 410. In other words, the spindle 510 includes the first spindle 510a, the second spindle 510b, and the third spindle 510c, and the transmission wheel 520 includes the first transmission wheel 520a, the second transmission wheel 520b, and the third transmission wheel 520c.

[0096] In some embodiments, the number of teeth of the drive gear 340 is less than the number of teeth of the first main gear 521a, the number of teeth of the first secondary gear 522a is less than the number of teeth of the second main gear 521b, the number of teeth of the second secondary gear 522b is less than the number of teeth of the third main gear 521c, and the number of teeth of the third secondary gear 522c is less than the number of teeth of the output gear 410.

[0097] In some embodiments, when the spindle 510 is rotatably connected to the housing 10, the first transmission wheel 520a is interference-fitted with the first spindle 510a, the second transmission wheel 520b is interference-fitted with the second spindle 510b, and the third transmission wheel 520c is interference-fitted with the third spindle 510c. The installation method of the first spindle 510a, the second spindle 510b, and the third spindle 510c is the same as the installation method of the transmission shaft 50 being rotatably connected to the housing 10 described above, and will not be repeated here.

[0098] In some embodiments, when the spindle 510 is integrally formed with the first housing 110, that is, when the first spindle 510a, the second spindle 510b, and the third spindle 510c are integrally formed with the first housing 110, the first transmission wheel 520a is in clearance fit with the first spindle 510a, the second transmission wheel 520b is in clearance fit with the second spindle 510b, and the third transmission wheel 520c is in clearance fit with the third spindle 510c. The installation method of the first spindle 510a, the second spindle 510b, and the third spindle 510c is the same as the installation method of the transmission shaft 50 being integrally formed with the housing, and will not be repeated here.

[0099] In some embodiments, the actuator 100 includes a sealing ring 90a (e.g., Figure 3 As shown, the sealing ring 90a is sleeved on the output shaft 410 and located between the output gear 420 and the second housing 120 to prevent external dust and moisture from entering the housing 10 through the third through hole 122.

[0100] In some embodiments, such as Figure 1 As shown, the actuator 100 also includes a charging interface 90b, which is electrically connected to the circuit board 20a. For example, the charging interface 90b is electrically connected to the circuit board 20a via pins. The charging interface 90b is used to supply power to the circuit board 20a.

[0101] The actuator provided in this application embodiment simplifies wiring and reduces assembly complexity by etching the first coil 210b onto the circuit board 20a and integrating the drive cell 70 and position sensor 80 onto the circuit board 20a, thereby reducing costs. Furthermore, by positioning the stator assembly 20b and the circuit board 20a between the first rotor 320 and the second rotor 330, the circuit board 20a, stator assembly 20b, and rotor assembly 30 form a disc motor, shortening the axial dimension of the actuator 100 and making its structure more compact, facilitating integration with automobiles. Finally, the use of parallel shaft transmission for the rotor shaft, spindle, and output shaft improves transmission efficiency and reliability.

[0102] 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 circuit board is disposed within the housing; Stator assembly, disposed on the circuit board; The rotor assembly is rotatably disposed within the housing; An output unit, at least partially disposed within the housing, is rotatably connected to the housing and connected to the rotor assembly; The rotor assembly is rotatable relative to the stator assembly to drive the output unit to rotate relative to the housing.

2. The actuator according to claim 1, characterized in that, The stator assembly includes at least one coil, which is disposed on the circuit board and distributed sequentially along the circumference of the rotor assembly; or, The stator assembly further includes at least one iron core and at least one coil. The at least one iron core is disposed on the circuit board, and the at least one coil is distributed sequentially along the circumference of the rotor assembly, with each coil wound around a corresponding iron core.

3. The actuator according to claim 1, characterized in that, The rotor assembly includes a rotor shaft, a first rotor, and a second rotor. The rotor shaft is rotatably connected to the housing, and the first rotor and the second rotor are both coaxially fixed to the rotor shaft. The rotor shaft passes through the circuit board, and both the circuit board and the stator assembly are disposed between the first rotor and the second rotor.

4. The actuator according to claim 3, characterized in that, The rotor assembly further includes a drive gear connected to the rotor shaft and disposed at the end of the second rotor away from the circuit board, and the drive gear is connected to the output unit.

5. The actuator according to claim 4, characterized in that, The output unit includes an output shaft and an output gear. The output shaft is rotatably connected to the housing, and the output gear is connected to the output shaft and connected to the drive gear.

6. The actuator according to claim 5, characterized in that, The actuator also includes a transmission assembly disposed within the housing, which is connected to the rotor assembly and the output unit respectively.

7. The actuator according to claim 6, characterized in that, The transmission assembly includes a double gear, which is rotatably mounted on the housing and meshes with the drive gear and the output gear respectively.

8. The actuator according to claim 7, characterized in that, The double gear includes a main gear, a secondary gear, and a spindle, with both the main gear and the secondary gear being sleeved on the spindle. The spindle is rotatably connected to the housing, the main wheel meshes with the drive gear, and the secondary wheel meshes with the output gear.

9. The actuator according to claim 1, characterized in that, The actuator further includes a drive battery cell disposed on the circuit board and electrically connected to the stator assembly; and / or The actuator includes a position sensor disposed on the circuit board, and the position sensor is used to sense the position of the output unit.

10. The actuator according to claim 1, characterized in that, The housing is provided with at least one positioning step, and the circuit board abuts against the at least one positioning step; and / or The housing is provided with at least one positioning post, and the circuit board is provided with at least one positioning hole, with each positioning post passing through a corresponding positioning hole.

Images