Electric drive system and fluid control system

Abstract

The invention provides an electric driving system which comprises a motor assembly which comprises a magnetic rotor, a coil assembly, an upper pole plate, a lower pole plate, an upper magnet vane and a lower magnet vane, and the upper magnet vane and the lower magnet vane are arranged between the upper pole plate and the lower pole plate and are made of non-magnetic materials. The power transmission system comprises a clutch gear system and a transmission gear system, the clutch gear system comprises a clutch wheel piece and a clutch gear, the clutch wheel piece is arranged to be associated with the magnetic rotor so as to be capable of rotating when the magnetic rotor rotates, the clutch gear is configured to be capable of moving between an extending position and a retracting position, in the extending position, the clutch wheel piece is arranged to be capable of rotating when the magnetic rotor rotates, and the transmission gear system is arranged to be capable of rotating when the magnetic rotor rotates. The clutch gear is engaged with the clutch wheel piece, the transmission gear train comprises an input gear arranged to be meshed with the clutch gear and an intermediate output component configured to be used for outputting power at the retraction position, the clutch gear is separated from the clutch wheel piece, and the transmission gear train comprises an output gear arranged to be meshed with the clutch gear and an intermediate output component configured to be used for outputting power; and the power output assembly is connected with the middle output component. The disclosure also relates to a fluid control system.

Description

Technical Field

[0001] The present invention relates to the field of electric drive, and more particularly to an electric drive system and a fluid control system comprising the electric drive system. Background Art

[0002] The fluid control system usually includes a valve for controlling the flow of fluid and an electric drive system for electrically controlling the valve. More specifically, a motor is usually used to drive a dial to pull the valve open, and the fluid control system may include an elastic reset member for the dial so that the valve is reset and closed when the motor is powered off. Alternatively, the valve can also be reset and closed by the deadweight of the valve. When the motor is powered on, it drives the dial to overcome the elastic reset member or its own gravity to open the valve and supply water or air; after the motor is powered off, the valve is automatically closed by the elastic reset member or the deadweight of the valve to stop the water or air supply.

[0003] At present, hysteresis motors are usually used to drive the opening and closing of valves. However, when the power is off, the rotor of the hysteresis motor cannot be completely demagnetized instantly, and there will be residual magnetism remaining, which will generate resistance when the valve is reset and closed. Combined with the meshing resistance of the motor reduction gear transmission system, it will make it impossible to close the valve quickly. If the residual magnetism is high, the valve will close slowly or even fail to close normally, which will cause water leakage in the case of water supply, and will make it impossible to accurately control the gas flow rate in the case of gas supply, resulting in poor system performance and affecting the user experience. In addition, the hysteresis ring of the hysteresis motor is generally made of iron, chromium and cobalt, which are expensive materials, resulting in excessively high costs for the entire motor.

[0004] There is still a need for an improved electric drive system to at least partially solve the problems of the prior art. Summary of the invention

[0005] To this end, according to one aspect of the present invention, an electric drive system is provided, comprising:

[0006] A motor assembly includes a motor housing, wherein the motor assembly further includes:

[0007] a rotatable magnetic rotor;

[0008] An upper pole plate is provided with a plurality of upper pole claws;

[0009] A lower pole plate is provided with a plurality of lower pole claws;

[0010] An upper magnetic isolation plate, formed of a non-magnetic conductive material and disposed between the upper pole plate and the lower pole plate adjacent to the upper pole plate;

[0011] A lower magnetic isolation plate, formed of a non-magnetic conductive material and disposed between the upper pole plate and the lower pole plate adjacent to the lower pole plate;

[0012] A coil assembly is arranged between the upper electrode plate and the lower electrode plate;

[0013] Power train, including:

[0014] A clutch gear train, comprising a clutch wheel plate and a clutch gear, wherein the clutch wheel plate is arranged to be associated with the magnetic rotor so as to be able to rotate when the magnetic rotor rotates, and the clutch gear is configured to be able to move between an extended position and a retracted position; wherein, in the extended position, the clutch gear is engaged with the clutch wheel plate, and in the retracted position, the clutch gear is separated from the clutch wheel plate;

[0015] a transmission gear train including an input gear configured to mesh with the clutch gear and an intermediate output member configured to output power; and

[0016] A power output assembly is connected to the intermediate output member.

[0017] The electric drive system proposed by the present invention may include one or more of the following further developments according to different embodiments.

[0018] In some embodiments, at least a portion of the clutch gear train and the transmission gear train are disposed in the motor housing.

[0019] In some embodiments, the magnetic rotor includes a rotor gear shaft, and the clutch wheel is configured to mesh with the rotor gear shaft.

[0020] In some embodiments, the motor housing includes a main housing and a cover, and the motor assembly also includes a fixing plate arranged in the motor housing, the fixing plate is configured to support the transmission gear train and the clutch gear train together with the cover, there are gaps between the transmission gear train and the clutch gear train and the fixing plate as well as between the fixing plate and the cover, and the main housing includes a positioning member configured to position the fixing plate.

[0021] In some embodiments, the positioning member includes a plurality of protrusions disposed on the peripheral wall of the main shell, and upper ends of the plurality of protrusions are located on the same plane parallel to the top surface of the main shell.

[0022] In some embodiments, the plurality of protrusions protrude from a peripheral wall of the main housing toward an interior of the main housing.

[0023] In some embodiments, the upper pole plate is placed on the plurality of protrusions and abuts against upper ends of the plurality of protrusions, and the fixing plate is disposed on a side of the upper pole plate opposite to the upper magnetic isolation plate.

[0024] In some embodiments, the upper magnetic isolation plate is configured to fit with the upper pole plate.

[0025] In some embodiments, a plurality of support shafts are disposed on the fixing plate, and the plurality of support shafts are configured to support the transmission gear train.

[0026] In some embodiments, the electric drive system also includes a containing box, which includes: a box body, which includes a box body shell made of metal material and a lining made of insulating material arranged in the box body shell; and a box cover, which is constructed to cover the open end of the box body, and the box cover includes a box cover shell made of metal material and a lining cover made of insulating material arranged in the box cover shell.

[0027] In some embodiments, the housing box is configured to house at least a portion of the power output assembly.

[0028] In some embodiments, the powertrain includes an electromagnet assembly including a movable core configured to move the clutch gear from the retracted position to the extended position when the electromagnet assembly is energized.

[0029] In some embodiments, the clutch gear train further includes an elastic return member configured to urge the clutch gear to return from the extended position to the retracted position when the electromagnet assembly is de-energized.

[0030] In some embodiments, the first axial end face of the clutch wheel plate is arranged opposite to the first mating axial end face of the clutch gear, the first axial end face is provided with a first meshing tooth, and the first mating axial end face is provided with a second meshing tooth that can mesh with the first meshing tooth.

[0031] In some embodiments, the electric drive system includes a circuit board assembly accommodated in the accommodation box, and the circuit board assembly is configured to synchronously transmit power to the motor assembly and the electromagnet assembly.

[0032] In some embodiments, the electromagnet assembly is housed in the housing box.

[0033] In some embodiments, the box body is connected to the cover of the motor housing; a first flange structure protruding outward is provided on the outer surface of the cover, and a first receiving groove is provided at the bottom of the box body, and each first receiving groove is configured to receive a corresponding first flange structure; and / or a second flange structure protruding outward is provided at the bottom of the box body, and the cover is provided with a second receiving groove, and each second receiving groove is configured to receive a corresponding second flange structure.

[0034] In some embodiments, a notch is disposed at the bottom of the box shell, and an axially extending support structure passing through the notch is disposed at the bottom of the liner, wherein the axially extending support structure is configured to abut against an outer surface of the cover.

[0035] In some embodiments, the cover is provided with a first clearance hole corresponding to the clutch gear, and the bottom of the liner is provided with a limiting structure for the clutch gear.

[0036] In some embodiments, clearance holes for the intermediate output member to pass through are provided in the cover and in the bottoms of the box shell and the liner.

[0037] In some embodiments, the upper magnetic isolation plate and the lower magnetic isolation plate are staggered in the circumferential direction at an offset angle α, and the offset angle α satisfies α=360° / n / 2, where n is the number of pole pairs of the motor assembly.

[0038] In some embodiments, the upper magnetic isolation plate and the lower magnetic isolation plate are configured to have the same shape as each other.

[0039] In some embodiments, the lower pole plate is the bottom plate of the main housing of the motor housing, and the lower magnetic isolation plate is arranged in contact with the bottom plate.

[0040] In some embodiments, the electric drive system further includes a damping mechanism, wherein the damping mechanism includes a damping gear configured to mesh with the clutch gear and a damping block disposed on the damping gear.

[0041] In some embodiments, the damping block is axially stacked on the damping gear, and the damping block includes a main body configured to be connected to the damping gear via a shaft and two circumferentially extending damping arms, each damping arm is connected to the main body at one circumferential end.

[0042] In some embodiments, the two damping arms are centrally symmetrically arranged with respect to the center of the shaft.

[0043] In some embodiments, a receiving cavity for receiving the damping block is provided at the bottom of the lining.

[0044] According to another aspect of the present invention, a fluid control system is provided, which comprises a valve and the electric drive system as described above for driving the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0046] Figure 1 is a three-dimensional exploded schematic diagram of an electric drive system according to an embodiment of the present invention;

[0047] Figure 2 is a perspective exploded schematic diagram of a motor assembly of an electric drive system according to an embodiment of the present invention;

[0048] Figure 3 is a perspective schematic diagram of an upper plate of a motor assembly according to an embodiment;

[0049] Figure 4 is a three-dimensional schematic diagram of an upper magnetic isolation plate of a motor assembly according to an embodiment;

[0050] Figure 5 is a three-dimensional schematic diagram of a lower magnetic isolation plate of a motor assembly according to an embodiment;

[0051] Figure 6 is a perspective schematic diagram of a main housing of a motor housing of a motor assembly according to an embodiment, wherein a plurality of lower pole claws are arranged on the bottom wall of the main housing;

[0052] Figure 7 is a schematic top view of a main housing with a lower magnetic isolation plate installed according to one embodiment;

[0053] Figure 8 is a top view schematic diagram showing the circumferential misalignment arrangement between the upper magnetic isolation plate and the lower magnetic isolation plate according to an embodiment;

[0054] Fig. 9 is a perspective schematic diagram of a main housing of a motor housing according to one embodiment;

[0055] Fig.10 is a schematic axial cross-sectional view of a main housing of a motor housing according to one embodiment;

[0056] Fig.11 is a schematic axial cross-sectional view of a motor assembly according to one embodiment;

[0057] Fig.12 is a schematic axial cross-sectional view of a motor assembly according to one embodiment shown from another angle, showing an intermediate output member;

[0058] Fig.13is a front view schematic diagram of a clutch gear train of an electric drive system according to an embodiment, wherein the clutch gear and the clutch wheel plate are separated from each other;

[0059] Fig.14 A schematic axial cross-sectional view of a motor assembly and a powertrain of an electric drive system according to one embodiment, wherein the clutch gear and the clutch wheel plate are separated from each other;

[0060] Fig.15 is a schematic axial cross-sectional view of an electromagnet assembly and a clutch gear train of an electric drive system according to an embodiment, wherein the clutch gear and the clutch wheel are separated from each other;

[0061] Fig.16 is a front view schematic diagram of an electromagnet assembly and a clutch gear train of an electric drive system according to an embodiment, wherein the clutch gear and the clutch wheel plate are meshed with each other;

[0062] Fig.17 is a partial enlarged schematic diagram showing the meshing structure of the clutch gear and the clutch wheel plate;

[0063] Fig.18 is a perspective exploded schematic diagram of a housing box of an electric drive system according to an embodiment;

[0064] Fig.19a and 19b They are respectively different axial cross-sectional schematic diagrams of a housing of an electric drive system according to an embodiment;

[0065] Fig. 20 is a schematic top view of a housing of an electric drive system according to an embodiment, wherein an electromagnet assembly and a circuit board assembly are mounted therein;

[0066] Fig.21 is a schematic top view of a housing of a housing of an electric drive system according to an embodiment;

[0067] Fig. 22 is a perspective schematic diagram of a motor assembly and a housing of a receiving box assembled together in an electric drive system according to an embodiment;

[0068] Fig.23 is a perspective schematic diagram of a cover of a motor housing of a motor assembly of an electric drive system according to an embodiment;

[0069] Fig.24 is a bottom bottom view of a housing of a housing box of an electric drive system according to an embodiment;

[0070] Fig.25 is a perspective schematic diagram of a box lining of a containing box of an electric drive system according to an embodiment;

[0071] Fig.26 is a perspective schematic diagram of a powertrain with a damping assembly of an electric drive system according to an embodiment;

[0072] Fig. 27 is an axial cross-sectional schematic diagram showing the connection between a transmission gear train and a clutch gear train of an electric drive system according to one embodiment;

[0073] Fig.28 is a three-dimensional exploded schematic diagram of a frame, a pin and a sheath of a coil assembly according to an embodiment;

[0074] Fig.29 is a cross-sectional schematic diagram of a skeleton, a pin and a sheath of a coil assembly assembled together according to an embodiment;

[0075] Fig.30 is a top view schematic diagram of a frame of an assembled coil assembly with a terminal block according to an embodiment;

[0076] Fig.31 is a side view schematic diagram of a frame of an assembled coil assembly with a terminal block and pins according to an embodiment;

[0077] Fig.32 is an axial cross-sectional view of an electric drive system according to one embodiment, showing the arrangement of pins.

[0078] Reference numerals list

[0079] 1Electric drive system

[0080] 10 Motor assembly

[0081] 20 Powertrain

[0082] 21Intermediate output components

[0083] 22 Intermediate output shaft

[0084] 30 Power output assembly

[0085] 31 Output gear

[0086] 32 Input components

[0087] 33 Output shaft

[0088] 100 main shell

[0089] 101 convex part

[0090] 110 magnetic rotor

[0091] 111 rotor gear shaft

[0092] 120 coil assembly

[0093] 130 upper plate

[0094] 131 Upper Pole Claw

[0095] 140 lower plate

[0096] 141 Lower Pole Claw

[0097] 150 Upper magnetic isolation plate

[0098] 151 upper pole claw hole

[0099] 160 Lower magnetic isolation plate

[0100] 161 lower pole claw hole

[0101] 170 fixed plate

[0102] 171a, 171b, 171c, 171d, 171e support shafts

[0103] 172a, 172b positioning protrusions

[0104] 180 Skeleton

[0105] 181 first annular end plate

[0106] 182 second annular end plate

[0107] 183 connecting shaft

[0108] 190 caps

[0109] 191 first flange structure

[0110] 192 First yield hole

[0111] 194 Make way hole

[0112] 195 Second Gap

[0113] 200 Clutch gear train

[0114] 210 clutch wheel

[0115] 211 first axial end surface

[0116] 212 first meshing tooth

[0117] 213 axis

[0118] 220 Clutch gear

[0119] 220a First clutch gear unit

[0120] 220b Second clutch gear unit

[0121] 221 first mating axial end face

[0122] 222 second meshing tooth

[0123] 230 electromagnet assembly

[0124] 231 movable iron core

[0125] 240 first elastic reset member

[0126] 250 Transmission Gear Train

[0127] 251 Input gear

[0128] 300 container

[0129] 310 cabinet

[0130] 320 cabinet shell

[0131] 321 positioning spring

[0132] 322 Mounting Lugs

[0133] 327 first receiving slot

[0134] 328 First Gap

[0135] 330 lining

[0136] 331 positioning protrusion

[0137] 332 axial extension support structure

[0138] 333 limit structure

[0139] 333a hole

[0140] 334 Make way hole

[0141] 335 support

[0142] 336 hook

[0143] 337 Accommodation Chamber

[0144] 337a protruding circumferential wall

[0145] 340 Circuit Board Assembly

[0146] 350 outlet

[0147] 351 first outlet hole

[0148] 352 second outlet hole

[0149] 353 partition bar

[0150] 360 box cover

[0151] 370 box cover shell

[0152] 371 holes

[0153] 373 bearings

[0154] 380 Lining Cover

[0155] 381 holes

[0156] 383 fitting surface

[0157] 400 damping mechanism

[0158] 410 shaft

[0159] 420 damping gear

[0160] 430 damping block

[0161] 431 Main body

[0162] 432 first damping arm

[0163] 433 Second damping arm

[0164] 435 First Seam

[0165] 436 Second Seam

[0166] 500 terminal block

[0167] 510 first pin

[0168] 511 first connection end

[0169] 512 first terminal

[0170] 513 First short paragraph

[0171] 514 The first long paragraph

[0172] 515 First connection section

[0173] 520 second pin

[0174] 521 Second connection terminal

[0175] 522 Second terminal

[0176] 523 Second short paragraph

[0177] 524 The second long paragraph

[0178] 525 Second connection section

[0179] 530 first pin slot

[0180] 533 First short segment receiving unit

[0181] 534 First long section receiving unit

[0182] 535 first connection receiving unit

[0183] 536 first partition wall

[0184] 540 second pin slot

[0185] 543 Second short segment receiving unit

[0186] 544 Second long section receiving unit

[0187] 545 second connection receiving unit

[0188] 546 Second partition wall

[0189] 550 upper end surface

[0190] 600 sheath

[0191] 610 Circumferential surrounding part

[0192] 611 skirt

[0193] 612 radial outer side wall

[0194] 613 partition wall

[0195] 620 long section guide

[0196] 621 first guide hole

[0197] 622 second guide hole

[0198] 650 mounting surface

[0199] α misalignment angle

[0200] F'Pressure

[0201] f1 axial force

[0202] f2 axial pull-in pressure Specific embodiments

[0203] Below, the electric drive system according to the embodiment of the present disclosure is described in detail with reference to the accompanying drawings. In order to make the purpose, technical solution and advantages of the present utility model more clear, the technical solution in the embodiment of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present disclosure. Obviously, the described embodiment is a part of the embodiment of the present disclosure, not all of the embodiments.

[0204] Therefore, the following detailed description of the embodiments of the present disclosure provided in conjunction with the accompanying drawings is not intended to limit the scope of the present disclosure claimed for protection, but merely represents selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0205] Unless otherwise defined in the context, the singular includes the plural. Throughout the specification, the terms "comprising", "having", etc. are used herein to specify the presence of the features, numbers, steps, operations, elements, parts or combinations thereof, but do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, parts or combinations thereof.

[0206] In addition, even though terms including ordinal numbers such as "first," "second," etc. may be used to describe various components, these components are not limited by these terms, and these terms are only used to distinguish one element from other elements. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component without departing from the scope of the present disclosure.

[0207] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the disclosed product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0208] like Figure 1 As shown, the present disclosure provides an electric drive system 1, which is used, for example, to control the opening or closing of a valve in a fluid control system. According to one embodiment, the electric drive system 1 may include a motor assembly 10, more specifically a synchronous motor assembly, more specifically a motor assembly including a claw-pole synchronous motor. The electric drive system 1 may also include a power transmission system 20 and a power output assembly 30, the power transmission system 20 being used to transfer power from the motor assembly 10 to the power output assembly 30, and the power output assembly 30 being used to drive external components, such as valves in a fluid control system. The power transmission system 20 may include an intermediate output member 21, which is, for example, an intermediate output gear, and the intermediate output member is configured to be connected to the power output assembly 30 to transfer power to the power output assembly 30.

[0209] like Figure 1-12As shown in FIGS. 23 and 24 , the motor assembly 10 may include a motor housing. More specifically, the motor housing may be configured to include a main housing 100 and a cover 190, and the cover 190 may be fixed to the open end of the main housing 100. The motor assembly 10 also includes a rotatable magnetic rotor 110 located in the motor housing and a coil assembly 120 that drives the coil of the magnetic rotor 110 when power is applied, and the coil assembly 120 is, for example, arranged around the magnetic rotor 110. The motor assembly 10 may also include an upper pole plate 130 and a lower pole plate 140 located in the motor housing, the upper pole plate 130 being provided with a plurality of upper pole claws 131, and the lower pole plate 140 being provided with a plurality of lower pole claws 141. The number of the upper pole claws 131 may be equal to the number of the lower pole claws 141. More specifically, in the axial direction (i.e., in the direction along the rotation axis of the magnetic rotor 110 of the motor assembly 10), the coil assembly 120 is located between the upper pole plate 130 and the lower pole plate 140. More specifically, the lower plate 140 may be a bottom plate of the main housing 200 of the motor housing.

[0210] In some embodiments, in order to control the rotation direction of the magnetic rotor 110 of the motor assembly 10 so that the magnetic rotor 110 can only start to rotate in a predetermined rotation direction when the coil assembly 120 is powered on and always has a tendency to rotate in the predetermined rotation direction during power-on, the motor assembly 10 may include a rotor rotation orientation assembly. In a specific embodiment, the rotor rotation orientation assembly is configured to enable the coil assembly 120 to generate a driving force that causes the magnetic rotor 110 to rotate in a predetermined rotation direction.

[0211] In a specific embodiment, Figure 2-8 As shown, the rotor rotation orientation assembly includes an upper magnetic isolation plate 150 and a lower magnetic isolation plate 160 made of non-magnetic conductive material. The upper magnetic isolation plate 150 is disposed between the upper pole plate 130 and the lower pole plate 140 adjacent to the upper pole plate 130. More specifically, the upper magnetic isolation plate 150 may be provided with corresponding upper pole claw holes 151 for the plurality of upper pole claws 131 to pass through. Correspondingly, the lower magnetic isolation plate 160 is disposed between the upper pole plate 130 and the lower pole plate 140 adjacent to the lower pole plate 140, more specifically, the bottom plate of the main housing 100. More specifically, the lower magnetic isolation plate 160 may be provided with corresponding lower pole claw holes 161 for the plurality of lower pole claws 141 to pass through. In a specific embodiment, the lower pole claws 141 are directly formed on the bottom plate of the main housing 100 of the motor housing, and the lower magnetic isolation plate 160 is disposed in contact with the bottom plate of the main housing 100, and is fixedly connected to the bottom plate of the main housing 100, for example, by riveting. More specifically, the upper magnetic isolation plate 150 is attached to the upper pole plate 130 and is fixedly connected thereto, for example, by riveting.

[0212] Thus, the coil assembly 120 of the motor assembly 10 generates a magnetic field when energized, but due to the presence of the upper magnetic isolation plate 150 and the lower magnetic isolation plate 160, a portion of the magnetic circuit of the coil assembly 120 is shielded, so that the magnetic rotor 110 can only start rotating in a predetermined rotation direction, which is used, for example, to open a valve. Figure 8 As shown, in some embodiments, the upper magnetic isolation plate 150 and the lower magnetic isolation plate 160 are arranged to be offset relative to each other in the circumferential direction at an offset angle α, and the offset angle α satisfies α=360° / n / 2, where n is the number of pole pairs of the motor component. The offset angle α allows the upper magnetic isolation plate 150 and the lower magnetic isolation plate 160 to achieve optimal rotor rotation positioning performance. In a specific embodiment, as Figure 2-8 As described above, the upper magnetic isolation plate 150 and the lower magnetic isolation plate 160 are constructed to be consistent in shape with each other. More specifically, the upper magnetic isolation plate 150 and the lower magnetic isolation plate 160 are constructed to be exactly the same as each other, which can reduce the investment in the mold and ensure stable operating characteristics.

[0213] In some embodiments, Figure 1 , 13 -16, 26, the power transmission system 20 may include a clutch gear system 200 and a transmission gear system 250. The clutch gear system 200 is configured to kinematically couple the magnetic rotor 110 with the transmission gear system 250. In one embodiment, the clutch gear system 200 may include a clutch wheel 210 and a clutch gear 220. The clutch wheel 210 may be configured to be associated with the magnetic rotor 110 so as to be able to rotate when the magnetic rotor 110 rotates, thereby transmitting the power from the magnetic rotor 110, that is, transmitting the motor driving force. More specifically, the magnetic rotor 110 may include a rotor gear shaft 111, which is, for example, formed integrally with the magnetic rotor 111, and the clutch wheel 210 is configured to directly mesh with the rotor gear shaft 111. The clutch gear 220 is configured to mesh with the input gear 251 of the transmission gear train 250, and is configured to be movable between an extended position and a retracted position. In the extended position, the clutch gear 220 is engaged with the clutch wheel plate 210, and in the retracted position, the clutch gear 220 is separated from the clutch wheel plate 210. Thus, the kinematic connection and separation between the power transmission system 20 and the magnetic rotor 110 can be controlled by controlling the clutch gear train 200, more specifically, by controlling the engagement and separation of the clutch gear 220 and the clutch wheel plate 210. In a specific embodiment, as shown in the figure, the clutch gear 220 may include a first clutch gear portion 220a configured to mesh with the clutch wheel plate 210 and a second clutch gear portion 220b meshed with the input gear 251 of the transmission gear train 250, and the first clutch gear portion 220a and the second clutch gear portion 220b may be formed integrally.

[0214] like Figure 1 , 15-16, 18, 20, in some embodiments, the power transmission system 20 may further include an electromagnet assembly 230 for driving the clutch gear 220. The electromagnet assembly 230 may include a movable iron core 231, which is configured to move the clutch gear 220 from the retracted position to the extended position, for example, via the shaft 231 of the clutch gear 220, when the electromagnet assembly is energized, so as to engage with the clutch wheel 210. In a specific embodiment, the first axial end face 211 of the clutch wheel 210 is arranged opposite to the first mating axial end face 221 of the clutch gear 220, the first axial end face 211 is provided with a first meshing tooth 212, and the first mating axial end face 221 is provided with a second meshing tooth 222 capable of meshing with the first meshing tooth 212, and the first meshing tooth 212 and the second meshing tooth 222 are, for example, triangular teeth. Thus, the kinematic engagement between the clutch wheel 210 and the clutch gear 220 can be achieved through the engagement of the first meshing teeth 212 and the second meshing teeth 222. More specifically, when the clutch wheel 210 is driven to rotate by the magnetic rotor 110, the clutch gear 220 can be driven by the movable iron core 231 to move from the retracted position to the extended position so that its second meshing teeth 222 are engaged with the first meshing teeth 212 of the clutch wheel 210, so that the first meshing teeth 212 transmit the rotational force to the second meshing teeth 222, thereby driving the clutch gear 220 to rotate at the same speed, thereby forming a transmission of the rotational force. In a specific embodiment, the clutch gear train 200 may further include a first elastic reset member 240, which is, for example, a compression spring. The first elastic reset member 240 is configured to actuate the clutch gear 220 to reset from the extended position to the retracted position when the electromagnet assembly 230 loses power, so that the clutch gear 220 is separated from the clutch wheel 210, and more specifically, the second meshing teeth 222 on the first mating axial end face 221 of the clutch gear 220 no longer mesh with the first meshing teeth 212 on the first axial end face 211 of the clutch wheel 210, thereby disconnecting the kinematic connection between the magnetic rotor 110 and the transmission gear train 250. In a specific embodiment, the electromagnet assembly 230 and the motor assembly 10 are energized at the same time; more specifically, the electromagnet assembly 230 and the motor assembly 10 lose power at the same time.

[0215] As mentioned above, in a specific embodiment, Fig.14 As shown, the clutch gear train 200 is arranged as the next stage of the magnetic rotor 110, that is, the clutch wheel 210 is directly meshed with the rotor gear shaft 111. This is an advantageous arrangement. Specifically, as Fig.16 and 17As shown, when the electromagnet assembly 230 and the motor assembly 10 are powered on, the movable iron core 231 presses down the clutch gear 220 to mesh with the clutch wheel plate 210, and at the same time, the magnetic rotor 110 rotates and drives the clutch wheel plate 210, and the first meshing tooth 212 of the clutch wheel plate 210 applies a pressure F' to the second meshing tooth 222 of the clutch gear 220 at the end surface, and the axial component of the pressure F' is f1. The axial suction pressure f2 of the movable iron core 231 on the second meshing tooth 222 needs to be greater than the axial component f1 to ensure that the clutch gear 220 and the clutch wheel plate 210 remain meshed, thereby kinematically connecting the entire power transmission chain. If the axial suction pressure f2 is less than the axial component f1, the clutch gear 220 will be urged upward, and the normal meshing of the second meshing tooth 222 and the first meshing tooth 212 cannot be ensured, which may cause the power transmission chain to be disconnected. The suction pressure f2 of the electromagnet assembly 230 is affected by its volume and cost. The larger f2 is, the higher the electromagnet cost is and the larger the electromagnet volume is. Therefore, it is hoped to reduce f2 as much as possible to reduce costs and reduce volume, thereby ensuring market competitiveness. Therefore, f1 should not be too large, and the faster the speed of the clutch gear train 200 is, the smaller f1 is. Considering that the general power transmission system is a reduction gear system, the gear closer to the magnetic rotor 110 has a faster speed, so it is preferred to set the clutch wheel 210 to directly mesh with the rotor gear shaft 111.

[0216] Therefore, in the case where the electric drive system 1 is used for a valve in a fluid control system, when the motor assembly 10 and the electromagnet assembly 230 are energized, on the one hand, the coil assembly 120 is energized to generate a magnetic circuit, and due to the presence of the upper magnetic isolation plate 150 and the lower magnetic isolation plate 160, part of the magnetic circuit of the coil assembly 120 is shielded, so that the magnetic rotor 110 can only start to rotate in a predetermined rotation direction, and the magnetic rotor 110 drives the clutch wheel 210 connected to it, for example, directly meshed with it, to rotate in the predetermined rotation direction; on the other hand, the movable iron core 231 of the electromagnet assembly 230 drives the clutch gear 220 moves from the retracted position to the extended position to engage with the clutch wheel 210 to transmit the rotational force to the clutch gear 220. The clutch gear 220 therefore drives the transmission gear system 250 meshing with it via the input gear 251 to rotate in a predetermined rotational direction; the transmission gear system 250 then drives the power output assembly 30 to rotate in a predetermined rotational direction via the intermediate output member 21, such as the intermediate output gear. The power output assembly 30 drives the valve to open, for example, via its output gear 31, and more specifically drives the valve to open via the dial, thereby realizing the kinematic connection of the entire power transmission chain.

[0217] In some application scenarios, the valve needs to be kept in an open state. At this time, the electric drive system 1 needs to be in a "power-on stalled state", that is, the power output assembly 30, such as the output gear 31, needs to continuously apply an opening driving force to the valve, more specifically, to the dial, so that the valve can overcome its own weight or the elastic restoring force of its elastic reset member and remain in an open state. At this time, the valve will apply a reverse rotational external force to the power output assembly 30, more specifically, the output gear 31, due to its own weight or its elastic reset member, that is, a force opposite to the predetermined rotation direction, so that the output gear 31 and thus the power output assembly 30 stop rotating, and accordingly the power transmission system 20 and the magnetic rotor 110 also stop rotating, and the valve remains open. During the continuous power-on process of the motor assembly 10 and the electromagnet assembly 230, if the valve or the dial is accidentally subjected to a large reverse rotation force, causing the power output assembly 30 to rotate in the reverse direction, the reverse rotation force is then transmitted to the magnetic rotor 110 through the power transmission system 20, and the magnetic rotor 110 can rotate in the reverse direction, that is, rotate in the direction opposite to the predetermined rotation direction; and when the large reverse external force is removed, due to the presence of the upper magnetic isolation plate 150 and the lower magnetic isolation plate 160, the magnetic rotor 110 will resume to rotate in the predetermined rotation direction, so that the power transmission system 20 and the power output assembly 30 will rotate in the predetermined rotation direction in the normal working state again until they are in the power-on and stalled state again. Therefore, the provision of the upper magnetic isolation plate 150 and the lower magnetic isolation plate 160 allows the directional rotation of the magnetic rotor to be achieved without providing the anti-reverse claw that is usually required in the prior art in the power transmission chain, thereby completely avoiding the defects associated with the use of the anti-reverse claw. More specifically, after the synchronous motor using the anti-reverse claw structure is blocked, the rotor will instantly rotate in the opposite direction, and then be blocked by the anti-reverse claw to rebound and produce a knocking sound. The rotor is still blocked in the forward rotation and repeatedly rebounds to produce intensive knocking noise, and the gears are easily damaged. The existence of the upper magnetic isolation plate 150 and the lower magnetic isolation plate 160 ensures that after the motor is blocked, the force in the specific direction of the magnetic field of the coil assembly 120 that the magnetic rotor 110 continues to be subjected to and the stall resistance are balanced, and the motor assembly 10 is in a relatively static state and does not generate noise.

[0218] When the motor assembly 10 and the electromagnet assembly 230 lose power, the magnetic rotor 110 stops rotating, the motor driving force disappears, and the valve drives the power output assembly 30 to rotate in the opposite direction under the elastic reset component or its own gravity, for example, through the dial; the electromagnet assembly 230 is powered off, the movable iron core 231 is reset, and the clutch gear 220 is actuated by the first elastic reset component 240 to separate from the clutch wheel 210, and the entire power transmission chain is disconnected, so that the restoring force of the valve cannot be transmitted to the magnetic rotor 110, so after the power is cut off, the resistance to the valve closing is only the possible friction force of some transmission components in the power transmission system 20, and there is no electromagnetic torque of the magnetic rotor 110. As a result, the valve has a small return resistance and a fast return speed. It can be restored immediately at the moment of power failure, which effectively shortens the valve closing time and improves the user experience. Due to the small return resistance, the impact force is large when the valve returns to close, which prevents poor sealing caused by incomplete closure. In addition, there is no hysteresis ring of the hysteresis motor, and the materials used are cheap, which reduces costs and improves product competitiveness. In addition, the claw-pole synchronous motor is easy to control and has a small stall current, which can achieve long-term stall in an energy-saving way. At the same time, the claw-pole synchronous motor control method is consistent with the hysteresis motor, and there is no need to change the client's control mode, program and wiring method, which has strong applicability.

[0219] like Fig.12 , 14 As shown, in some embodiments, at least a portion of the clutch gear train 200 and the transmission gear train 250 are disposed in the motor housing. More specifically, the transmission gear train 250 may include an intermediate output member 21 as described above, which is, for example, an intermediate output gear, which extends out of the motor housing to engage with the input member 32 of the downstream power output assembly 30. In some more specific embodiments, the clutch gear train 200 and the transmission gear train 250 and at least a portion of the power output assembly 30 may be located in the motor housing.

[0220] In some embodiments, Figure 11-12 As shown, in order to support the transmission gear train 250 and the clutch gear train 200 in the motor housing, more specifically the main housing 100, the motor assembly 10 may further include a fixing plate 170 disposed in the motor housing, the fixing plate 170 being configured to support the transmission gear train 250 and the clutch gear train 200 together with the cover 190 of the motor housing. More specifically, there is a gap between the transmission components of the transmission gear train 250 and the clutch gear train 200 and the fixing plate 170 and between the fixing plate 170 and the cover 190 to reduce the transmission resistance and thus reduce the return resistance of the valve. For example, a plurality of support shafts 171a, 171b, 171c, 171d, 171e ( Figure 2), the support shaft extends toward the cover 190 in the assembled state and can support the gear components of the transmission gear train 250 and the clutch gear train 200. In addition, in a more specific embodiment, as Figure 2 As shown, the fixing plate 170 is also provided with positioning protrusions 172a, 172b which extend toward the cover 190 and abut against the cover 190 in the assembled state, which is conducive to ensuring the axial positioning of the fixing plate 170 relative to the cover 190, thereby ensuring the stability of the above-mentioned gap. In a specific embodiment, the main housing 100 of the motor housing may include a positioning member configured to position the fixing plate 170, and the positioning member is configured to position the fixing plate 170 in the main housing 100 of the motor housing, thereby ensuring the distance between the fixing plate 170 and the cover 190, and thus ensuring the above-mentioned gap. More specifically, as Figure 9-12 As shown, the positioning member may include a plurality of protrusions 101 disposed on the peripheral wall of the main housing 100 of the motor housing, and the upper ends of these protrusions 101 are located on the same plane parallel to the top surface of the main housing 100, that is, the surface for fixing with the cover 190, and this plane constitutes a reference plane for positioning the fixing plate 170. These protrusions 101 may protrude from the peripheral wall of the main housing 100 toward the inside of the main housing 100, and for example, a plurality of protrusions 101 are evenly distributed along the circumferential direction. The protrusions 101 may be formed by stamping.

[0221] like Figure 11-12 As shown, in some embodiments, the upper pole plate 130 is placed on these protrusions 101 and abuts against the upper end of the protrusion 101, and the fixed plate 170 is arranged on the side of the upper pole plate 130 opposite to the upper magnetic isolation plate 150, that is, along the axial direction, the upper pole plate 130 is located between the fixed plate 170 and the upper magnetic isolation plate 150. More specifically, the fixed plate 170 and the upper magnetic isolation plate 150 are respectively attached to the two axial surfaces of the upper pole plate 130. The fixed plate 170, the upper pole plate 130 and the upper magnetic isolation plate 150 can be fixedly connected by riveting or the like. Therefore, since the upper pole plate 130 and the fixed plate 170 are relatively fixed, the positioning height of the two is determined based on the position of the protrusion 101 on the main shell 100. The transmission gear train 250 and the clutch gear train 200 are installed between the fixed plate 170 and the cover 190. Since the axial position of the fixed plate 170 is controllable, the axial clearance between the transmission gear train 250 and the clutch gear train 200 and the fixed plate 170 and the cover 190 can be controlled more accurately, making the transmission more stable. At the same time, since the clearance between the transmission gear train 250, the clutch gear train 200 and the cover 190 is stable, the problem of smaller clearance and increased friction due to vibration and other reasons in the electric drive system, and thus larger valve return resistance, is prevented.

[0222] like Fig.12As shown, in one embodiment, a gap is provided between the coil assembly 120 and the upper magnetic isolation plate 150. This can prevent the height of the coil assembly 120 from increasing after winding and pressing against the upper magnetic isolation plate 150, causing the upper magnetic isolation plate 150, the upper pole plate 130 and the fixing plate 170 to be lifted up and cause a poor clearance fit. Therefore, this is further conducive to the stability of the gap between the transmission gear train 250 and the clutch gear train 200 and the cover 190.

[0223] In one embodiment, Figure 1 , 18 As shown in FIGS. 25, 27 and 32, the electric drive system 1 further includes a housing box 300, which may include a housing 310 and a housing cover 360 configured to cover the open end of the housing 310. The housing 310 includes a housing shell 320 made of a metal material, and the housing cover 360 includes a housing cover shell 370 made of a metal material, which may be a high-strength galvanized steel sheet or an aluminum alloy. Figure 1 and 20 As shown, in a specific embodiment, the power output assembly 30 is arranged in the receiving box 300, and the power output assembly 30 can drive other components to move through its power output components, such as the output gear 31, for example, when the electric drive system 1 is used in a fluid control system, it drives the valve to move. At this time, the box shell 320 and the box cover shell 370 made of a high-strength metal material can ensure better support for the power output assembly 30. In addition, the receiving box 300 may need to be directly installed with the external customer end by screws, for example, by Fig.24 The mounting lug 322 provided on the box housing 320 is shown to be installed to the customer end, and the stronger box housing 320 and the box cover housing 370 can ensure the installation strength and reliability and prevent deformation caused by installation. More specifically, at this time, the box cover housing 370 can be provided with a hole 371 for supporting the output shaft 33 of the output gear 31 to pass through.

[0224] like Figure 18-22 , 27 and 32, in some embodiments, the box body 310 of the container box 300 may further include a liner 330 made of an insulating material, the liner 330 is disposed inside the box shell 320, and the box shell 320 surrounds and wraps the liner 330. More specifically, the box cover 360 may also include a liner cover 380 made of an insulating material. The insulating material may be, for example, a plastic material. In a specific embodiment, as Fig.18 and 19aAs shown, a plurality of positioning spring pieces 321 extending inward from the peripheral wall are provided on the peripheral wall of the box shell 320. The positioning spring pieces 321 are formed, for example, by punching holes on the peripheral wall of the box shell 320. Correspondingly, a plurality of positioning protrusions 331 protruding inward from the peripheral wall may be provided on the peripheral wall of the liner 330. When the liner 330 is installed into the box shell 320, the positioning spring pieces 321 are pressed flat by force, for example, flush with the peripheral wall of the box shell 320, and the liner 330 can slide down to the bottom along the peripheral wall of the box shell 320. As the liner 330 is installed in place, the positioning spring pieces 321 on the box shell 320 rebound and make their lower ends abut against the upper ends of the positioning protrusions 331 of the liner 330, thereby achieving the positioning of the liner 330 in the box shell 320 and preventing the liner 330 from accidentally falling out of the open end of the box shell 320. As shown in FIG. Fig.18 As shown, in a specific embodiment, a hole 381 corresponding to the hole 371 in the box cover shell 370 is provided in the lining cover 380, and the hole 381 is also provided for the output shaft 33 to pass through. More specifically, a bearing 373 is provided in the hole 371 of the box cover shell 370, and the bearing 373 is configured to support the rotation of the output shaft 33.

[0225] like Fig. 20 As shown, in some embodiments, the electric drive system 1 includes a circuit board assembly 340 contained in a container 300, and the circuit board assembly 340 is configured to transmit power to the motor assembly 10 and the electromagnet assembly 230, more specifically, synchronously transmit power to the motor assembly 10 and the electromagnet assembly 230. More specifically, the electromagnet assembly 230 is also contained in the container 300. Thus, the liner 330 and the liner cover 380 can surround the electromagnet assembly 230 and the circuit board assembly 340, and the liner 330 and the liner cover 380 use insulating materials to ensure circuit safety. More specifically, as Fig.18 , 19a As shown in FIGS. 19 b and 20 - 21 , a support rib 335 for supporting the circuit board assembly 340 at a first side of the circuit board assembly 340 and a hook 336 for clamping the circuit board assembly 340 at a second side of the circuit board assembly 340 opposite to the first side are provided in the liner 330. Thus, the circuit board assembly 340 can be firmly held in the liner 330 via the support rib 335 and the hook 336.

[0226] like Figure 22-24As shown, in some embodiments, the receiving box 300 is connected to the cover 190 of the motor housing via the box body 310. To this end, a first flange structure 191 protruding outward can be provided on the outer surface of the cover 190, and the bottom of the box body 310, more specifically, the bottom of the box shell 320 is provided with a first receiving groove 327, and each first receiving groove 327 is configured to receive a corresponding first flange structure 191. More specifically, the first flange structure 191 is configured to pass through the first receiving groove in the bottom of the box shell 320 and bend after passing through to be riveted to the box shell 320. Alternatively or additionally, a second flange structure protruding outward can also be provided at the bottom of the box body 310, more specifically, the bottom of the box shell 320, and a second receiving groove can be provided on the cover 190, and each second receiving groove is configured to receive a corresponding second flange structure. More specifically, the second flange structure is configured to pass through the second receiving groove in the cover 190 and bend after passing through to be riveted to the cover 190. More specifically, when assembling the electric drive system 1, the cover 190 of the motor housing can be first fixed to its main housing 100, for example, by riveting, and then the box shell 320 can be connected to the cover 190 of the motor housing through the cooperation of the flange structure 191 and the receiving groove 327 and fixed by riveting, and then the liner 330 can be installed in the box shell 320.

[0227] like Fig.19b and 25 As shown, in some embodiments, a first notch 328 may be provided at the bottom of the housing shell 320, and an axially extending support structure 332 extending through the first notch 328 in the assembled state may be provided at the bottom of the liner 330, and the axially extending support structure 332 is configured to abut against the outer surface of the cover 190 of the motor housing in the assembled state. The axially extending support structure 332 is more specifically a rib with a certain width and height. The axially extending support structure 332 allows the liner 330 to be positioned stably, and thus helps to ensure the axial clearance of the transmission components of the powertrain 20 and reduce friction.

[0228] like Fig.23 , 25As shown in Figures 27 and 27, in some embodiments, the cover 190 of the motor housing may be provided with a first clearance hole 192 corresponding to the clutch gear 220, and the bottom of the liner 330 may be provided with a limiting structure 333 for the clutch gear 220, and the limiting structure 333 may participate in limiting the retracted position of the clutch gear 220. This allows a more compact axial structure to be achieved. In a specific embodiment, the limiting structure 333 may protrude axially outward from the bottom of the liner 330, for example, it may correspond to the first notch 328 at the bottom of the box shell 320, so that the first notch 328 also serves as a clearance portion for the clutch gear 220. In a specific embodiment, the limiting structure 333 may be provided with a hole 333a for the shaft 213 of the clutch gear to pass through, so that the shaft 213 can reach the movable iron core 231 of the electromagnet assembly 230 located in the liner 330 through the hole 333a. In a more specific embodiment, as Fig.18 and 23 As shown, the cover 190 of the motor housing and the bottom of the liner 330 are respectively provided with clearance holes 194, 334 for the intermediate output member 21 to pass through, for example, a clearance hole for the intermediate output shaft 22 carrying the intermediate output gear to pass through.

[0229] like Figure 26-27 As shown, in some embodiments, the electric drive system 1 may further include a damping mechanism 400, which is configured to contribute to the stability of reverse recovery (valve closing recovery stability) when power is off and the stable operation and maintenance of the transmission gear train 250. The damping mechanism 400 may include a damping gear 420 configured to mesh with the clutch gear 220 and a damping block 430 disposed on the damping gear 420. More specifically, the damping block 430 may be axially stacked on the damping gear 420, and the damping block 430 includes a main body 431 configured to be connected to the damping gear 420 via the shaft 410 and two damping arms 432, 433 extending circumferentially, each damping arm 432, 433 being connected to the main body 431 at one circumferential end. More specifically, the two damping arms 432, 433 are arranged symmetrically with respect to the center of the shaft 410. As shown in the figure, in a specific embodiment, the damping block 430 is a disk with a certain thickness, and the disk includes a first slit 435 and a second slit 436 that are offset from the center and are symmetrical to the center. The main body 431 is located between the second slit 435 and the second slit 436 and includes the center of the disk. One end of the first slit 435 and the second slit 436 opens on the periphery of the disk, and the opposite end is connected to the main body 431 at a position relatively close to the periphery to form a first damping arm 432 and a second damping arm 433, respectively. In this case, in order to ensure the axial compactness of the electric drive system 1, a receiving cavity 337 for receiving the damping block 430 may also be provided at the bottom of the liner 330, such as Fig.25 and 27In a specific embodiment, the accommodating cavity 337 is surrounded by a protruding circumferential wall 337a extending axially outward from the bottom of the liner 330 , and the accommodating cavity 337 may correspond to the first notch 328 passing through the bottom of the box shell 320 , so that the first notch 328 also serves as a clearance portion for the damping block 430 .

[0230] As mentioned above, in some embodiments, the circuit board assembly 340 for power supply of the electric drive system 1 is arranged outside the motor housing, which is beneficial to the safety of the control circuit. Fig. 20 In the embodiment described in the above, the container is located in the container 300. In some embodiments, as Figure 28-32 As shown, the coil assembly 120 of the motor assembly 10 may include a skeleton 180 and a coil winding disposed on the skeleton 180. A terminal block 500 may be disposed on the skeleton 180. The terminal block 500 is configured to receive pins 510 and 520 that electrically connect the coil winding to the circuit board assembly 340. Specifically, the two pins may be referred to as a first pin 510 and a second pin 520, respectively. The first pin 510 and the second pin 520 may be cylindrical pins or square pins. To this end, the terminal block 500 may be provided with two pin slots 530 and 540, each of which is used to receive a pin inserted therein, for example, the first pin slot 530 is used to receive the first pin 510 inserted therein, and the second pin slot 540 is used to receive the second pin 540 inserted therein. For example, the first pin slot 530 and the second pin slot 540 may be open radially outward. The first pin 510 includes a first connection end 511 and a first terminal end 512, and the second pin 520 includes a second connection end 521 and a second terminal end 522. The first connection end 511 and the second connection end 521 are used to be electrically connected to the coil winding, and the first terminal end 512 and the second terminal end 522 are used to be terminated to the circuit board assembly 340. In order to ensure electrical safety, the electric drive system of the present disclosure may include a sheath 600, which may be configured to cooperate with the terminal block 500 to surround at least a portion of the first pin 510 and at least a portion of the second pin 520, more specifically, to surround the portion of the first pin 510 except the first terminal end 512 and the portion of the second pin 520 except the second terminal end 522.

[0231] In some embodiments, Fig.28 and 31As shown, the first pin 510 is configured to have two bends, which divide the first pin 510 into a first short section 513, a first long section 514, and a first connecting section 515 connecting the first short section 513 and the first long section 514. The first short section 513 includes a first connecting end 511, and the first long section 514 includes a first terminal end 512. Similarly, the second pin 520 is configured to have two bends, which divide the second pin 520 into a second short section 523, a second long section 524, and a second connecting section 525 connecting the second short section 523 and the second long section 524. The second short section 523 includes a second connecting end 521, and the second long section 524 includes a second terminal end 522. Correspondingly, the first pin slot 530 of the terminal block 500 can be constructed to have a first short segment receiving part 533, a first long segment receiving part 534 and a first connecting receiving part 535 connecting the first short segment receiving part 533 and the first long segment receiving part 534, and a first partition wall 536 is arranged between the first short segment receiving part 533 and the first long segment receiving part 534, wherein the first short segment receiving part 533 is constructed to accommodate the first short segment 513, the first long segment accommodating hole 534 is constructed to accommodate the first long segment 514, and the first connecting receiving part 535 is constructed to accommodate the first connecting segment 515. Similarly, the second pin slot 540 of the terminal block 500 can be constructed to have a second short segment receiving portion 543, a second long segment receiving portion 544 and a second connecting receiving portion 545 connecting the second short segment receiving portion 543 and the second long segment receiving portion 544, and a second partition wall 546 is arranged between the second short segment receiving portion 543 and the second long segment receiving portion 544, wherein the second short segment receiving portion 543 is constructed to accommodate the second short segment 523, the second long segment accommodating hole 544 is constructed to accommodate the second long segment 524, and the second connecting receiving portion 545 is constructed to accommodate the second connecting segment 525. More specifically, a portion of the first long segment 514 with the first termination end 512 is exposed outside the first long segment receiving portion 534, and a portion of the first short segment 513 with the first connection end 511 can also be exposed outside the first short segment receiving portion 533 to facilitate termination with the coil winding; similarly, a portion of the second long segment 524 with the second termination end 522 is exposed outside the second long segment receiving portion 544, and a portion of the second short segment 523 with the second connection end 521 can also be exposed outside the second short segment receiving portion 543 to facilitate termination with the coil winding. In a specific embodiment, as shown in the figure, the first pin 510 is configured in the assembled state so that its first short segment 513 and the first long segment 514 extend approximately parallel to each other, more specifically, extend axially; similarly, the second pin 520 is configured in the assembled state so that its second short segment 523 and the second long segment 514 extend approximately parallel to each other, more specifically, extend axially.In one embodiment, the first pin 510 and the second pin 520 are arranged such that the first long section 514 and the second long section 524 are arranged adjacent to each other, which allows for reducing the volume and material used of the sheath 600, thereby facilitating the overall compactness of the system.

[0232] In a more specific embodiment, Figure 28-29 As shown in FIG. 32 , the sheath 600 may also be provided with a circumferential surrounding portion 610, which may be configured to surround a portion of the long segments 514, 524 and the entire short segments 513, 523 of the two pins 510, 520, and the circumferential surrounding portion 610 is provided with a mounting surface 650 for mounting against the upper end surface 550 of the terminal block 500, so that the sheath 600 may be mounted on the terminal block 500. More specifically, as shown in the figure, the sheath 600 may also be provided with a long segment guide portion 620, which is configured to guide the long segments 514, 524 of the pins 510, 520 to the circuit board assembly 340 in an electrically isolated manner. As shown in the figure, the long section guide portion 620 can be configured to communicate with the circumferential surrounding portion 610 to receive the long sections 514, 524. More specifically, the long section guide portion 620 can include two first guide holes 621 and second guide holes 622 separated from each other, each guide hole is formed by, for example, a peripheral wall, for accommodating a portion of the first long section 514 of the first pin 510 and a portion of the second long section 524 of the second pin 520, respectively, and the portion of the first long section 514 and the portion of the second long section 524 are, for example, respectively loosely fitted in the first guide hole 621 and the second guide hole 622. More specifically, the long section guide portion 620 can be configured to extend through the second notch 195 in the cover 190 of the motor housing to the outside of the cover 190, so that the pins 510, 520 can be connected to the circuit board assembly 340 located outside the motor housing via their terminal ends 512, 522.

[0233] In a specific embodiment, Fig.29 and 32 As shown, the circumferential surrounding portion 610 of the sheath 600 is provided with a skirt 611 that at least surrounds the upper portion of the terminal block 500, so that the short sections 513, 523 and the connecting sections 515, 525 of the pins 510, 520 can be completely surrounded at the lower portion of the circumferential surrounding portion 610. More specifically, as shown in the figure, the sheath 600 can also include a radial outer side wall 612 of the circumferential surrounding portion 610 and a partition wall 613 extending from the lower portion of the outer side wall away from the rotor assembly 120, and the partition wall 613 and the radial outer side wall 612 are configured to abut against the motor housing, more specifically the inner side of the main housing 100 in the assembled state, thereby increasing the creepage distance between the pins 510, 520 and the motor housing to ensure electrical safety.

[0234] In some embodiments, Fig.28, 29 As shown in FIG. 30 , the skeleton 180 of the coil assembly 120 may be constructed to include a first annular end plate 181 and a second annular end plate 182 spaced axially apart and a connecting shaft 183 therebetween. The terminal block 500 may be disposed at the periphery of the first annular end plate 181 so that the terminal block 500 is located within the circumferential contour of the first annular end plate 181, as shown in FIG. Fig.30 This ensures radial compactness.

[0235] As mentioned above, reference Fig. 22 and 32 In the case where the circuit board assembly 340 is accommodated in the accommodation box 300, the box body 310 of the accommodation box 300, more specifically the lining body 330, is provided with a wire outlet portion 350, which is configured to receive the upper end of the long section guide portion 620 of the sheath 600, while allowing the terminal ends 512, 522 of the pins 510, 520 to extend outside the wire outlet portion 350, so as to allow the terminal ends 510, 520 to be connected to the circuit board assembly 340. More specifically, the wire outlet portion 350 may include a partition rib 353 configured to separate the wire outlet portion 350 into two wire outlet holes, namely a first wire outlet hole 351 and a second wire outlet hole 352, the first wire outlet hole 351 corresponds to the first guide hole 621 of the long section guide portion 620, and the second wire outlet hole 352 corresponds to the second guide hole 622 of the long section guide portion 620. In addition, at this time, the fixing plate 170 and the cover 190 of the motor housing mentioned above that may exist are provided with through holes that match the shape of the long section guide part 620 for it to pass through.

[0236] Thus, the sheath 600 isolates the pins 510 and 520 from the external structure, ensuring that the pins 510 and 520 do not contact any external metal structure, thereby ensuring safety performance. In a specific embodiment, the sheath 600 will first pass through the upper plate 130, then pass over the fixing plate 170, then pass through the cover 190 of the motor housing, and finally pass through the outlet portion 350 on the liner 330, enter the inner cavity of the box body 310, and achieve electrical connection with the circuit board assembly 340. The outlet portion 350 is provided with a partition rib 353, and the pins 510 and 520 extend from both sides of the partition rib 353. The partition rib 353 can increase the creepage distance between the pins 510 and 520, thereby improving the safety of the circuit.

[0237] The exemplary implementation of the electric drive system proposed in the present invention is described in detail above with reference to the preferred embodiments. However, those skilled in the art will appreciate that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention can be combined in various ways without exceeding the protection scope of the present invention.

[0238] The scope of the present disclosure is not limited by the above-described embodiments but by the appended claims and their equivalents.

Claims

1. An electric drive system, comprising: A motor assembly includes a motor housing, wherein the motor assembly further includes: a rotatable magnetic rotor; An upper pole plate is provided with a plurality of upper pole claws; A lower pole plate is provided with a plurality of lower pole claws; An upper magnetic isolation plate, formed of a non-magnetic conductive material and disposed between the upper pole plate and the lower pole plate adjacent to the upper pole plate; A lower magnetic isolation plate, formed of a non-magnetic conductive material and disposed between the upper pole plate and the lower pole plate adjacent to the lower pole plate; A coil assembly is arranged between the upper electrode plate and the lower electrode plate; Power train, including: A clutch gear train, comprising a clutch wheel plate and a clutch gear, wherein the clutch wheel plate is arranged to be associated with the magnetic rotor so as to be able to rotate when the magnetic rotor rotates, and the clutch gear is configured to be able to move between an extended position and a retracted position; wherein, in the extended position, the clutch gear is engaged with the clutch wheel plate, and in the retracted position, the clutch gear is separated from the clutch wheel plate; a transmission gear train including an input gear configured to mesh with the clutch gear and an intermediate output member configured to output power; and A power output assembly is connected to the intermediate output member.

2. The electric drive system according to claim 1, wherein: At least a portion of the clutch gear train and the transmission gear train are disposed in the motor housing.

3. The electric drive system according to claim 2, wherein: The magnetic rotor comprises a rotor gear shaft, and the clutch wheel is arranged to mesh with the rotor gear shaft.

4. The electric drive system according to claim 3, wherein: The motor housing includes a main housing and a cover, and the motor assembly also includes a fixing plate arranged in the motor housing, and the fixing plate is configured to support the transmission gear train and the clutch gear train together with the cover, and there are gaps between the transmission gear train and the clutch gear train and the fixing plate as well as between the fixing plate and the cover, and the main housing includes a positioning member configured to position the fixing plate.

5. The electric drive system according to claim 4, wherein: The positioning member includes a plurality of protrusions disposed on the peripheral wall of the main housing, and upper ends of the plurality of protrusions are located on the same plane parallel to the top surface of the main housing.

6. The electric drive system according to claim 5, wherein: The plurality of projections protrude from a peripheral wall of the main housing toward an interior of the main housing.

7. The electric drive system according to claim 6, wherein: The upper pole plate is placed on the plurality of protrusions and abuts against upper ends of the plurality of protrusions, and the fixing plate is arranged on a side of the upper pole plate opposite to the upper magnetic isolation plate.

8. The electric drive system according to claim 7, wherein: The upper magnetic isolation plate is configured to fit with the upper pole plate.

9. The electric drive system according to any one of claims 4 to 8, wherein: A plurality of support shafts are disposed on the fixing plate, and the plurality of support shafts are configured to support the transmission gear train.

10. The electric drive system according to any one of claims 4 to 8, wherein: The electric drive system further includes a housing box, the housing box including: A box body, the box body comprising a box body shell made of a metal material and a liner made of an insulating material disposed in the box body shell; and The box cover is constructed to cover the open end of the box body, and the box cover comprises a box cover shell made of metal material and a lining cover made of insulating material arranged in the box cover shell.

11. The electric drive system according to claim 10, wherein: The receiving box is configured to receive at least a portion of the power output assembly.

12. The electric drive system according to claim 11, wherein: The powertrain includes an electromagnet assembly including a movable core configured to move the clutch gear from the retracted position to the extended position when the electromagnet assembly is energized.

13. The electric drive system according to claim 12, wherein: The clutch gear train further includes an elastic return member configured to urge the clutch gear to return from the extended position to the retracted position when the electromagnet assembly is de-energized.

14. The electric drive system according to claim 13, wherein: The first axial end surface of the clutch wheel plate is arranged opposite to the first matching axial end surface of the clutch gear, the first axial end surface is provided with a first meshing tooth, and the first matching axial end surface is provided with a second meshing tooth that can mesh with the first meshing tooth.

15. The electric drive system according to claim 12, wherein: The electric drive system includes a circuit board assembly accommodated in the accommodation box, and the circuit board assembly is configured to synchronously transmit electric power to the motor assembly and the electromagnet assembly.

16. The electric drive system according to claim 15, wherein: The electromagnet assembly is accommodated in the accommodation box.

17. The electric drive system according to claim 16, wherein: The box body is connected to the cover of the motor housing, The outer surface of the cover is provided with a first flange structure protruding outward, and the bottom of the box body is provided with a first receiving groove, each first receiving groove is configured to receive a corresponding first flange structure; and / or The bottom of the box body is provided with a second flange structure protruding outward, and the cover is provided with a second receiving groove, and each second receiving groove is configured to receive a corresponding second flange structure.

18. The electric drive system according to claim 17, wherein: The bottom of the box shell is provided with a notch, and the bottom of the liner is provided with an axially extending support structure passing through the notch, and the axially extending support structure is configured to abut against the outer surface of the cover.

19. The electric drive system according to claim 16, wherein: The cover is provided with a first clearance hole corresponding to the clutch gear, and the bottom of the lining body is provided with a limiting structure for the clutch gear.

20. The electric drive system according to claim 17, wherein: The cover and the bottoms of the box shell and the liner are provided with clearance holes for the intermediate output member to pass through.

21. The electric drive system according to any one of claims 1 to 8, wherein: The upper magnetic isolation plate and the lower magnetic isolation plate are staggered in the circumferential direction at an offset angle α, and the offset angle α satisfies α=360° / n / 2, where n is the number of pole pairs of the motor assembly.

22. The electric drive system according to claim 21, wherein: The upper magnetic isolation plate and the lower magnetic isolation plate are configured to have the same shape as each other.

23. The electric drive system according to any one of claims 1 to 8, wherein: The lower pole plate is the bottom plate of the main housing of the motor housing, and the lower magnetic isolation plate is arranged in contact with the bottom plate.

24. The electric drive system according to claim 10, wherein: The electric drive system further includes a damping mechanism, which includes a damping gear configured to mesh with the clutch gear and a damping block disposed on the damping gear.

25. The electric drive system according to claim 24, wherein: The damping block is axially stacked on the damping gear, and includes a main body portion configured to be coupled to the damping gear via a shaft and two damping arms extending in a circumferential direction, each of the damping arms being connected to the main body portion at one circumferential end.

26. The electric drive system according to claim 25, wherein: The two damping arms are arranged centrosymmetrically with respect to the center of the shaft.

27. The electric drive system according to claim 24, wherein: The bottom of the lining body is provided with an accommodating cavity for accommodating the damping block.

28. A fluid control system comprising a valve and an electric drive system according to any one of claims 1 to 27 for driving the valve.

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