Blower motor

Abstract

Disclosed is a blower motor, comprising a circuit board module, a wire harness module, and a motor module. The circuit board module comprises a base, an end cover, a first sealing member, and a circuit board. The base comprises a housing having an opening in the top, the end cover covers the top of the housing, and a mounting cavity is formed between the end cover and the housing. The circuit board is provided in the mounting cavity. The wire harness module comprises a wire harness opening provided in the housing, and a wire harness provided at the wire harness opening and electrically connected to the circuit board. The first sealing member comprises an end cover sealing ring and a wire harness sealing member. The end cover sealing ring has two opposite end parts in the circumferential direction. The end cover sealing ring is sleevingly mounted on the housing and is circumferentially and radially limited. The motor module comprises a stator assembly and a rotor assembly, and the stator assembly is electrically connected to the circuit board and drives the rotor assembly to rotate. According to the present disclosure​, the problem of sealing and waterproofing at a lead can be solved, and the sealing performance between the mounting cavity in which the circuit board is located and the outside is ensured.

Description

A blower motor Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a blower motor. Background Art

[0002] Blowers, one of the applications of brushless motors, are widely used in automotive exhaust systems. In commercial vehicles, wind resistance is high due to practical factors such as their larger size and longer air ducts. Initially, only one blower was installed in the front row, which challenged delivering a large air volume to the middle and rear rows. This improvement resulted in the installation of a power-assisted blower, also known as a center-mounted rear blower, in the air duct near the middle row. This center-mounted rear blower relays the air flow from the front blower to the rear row, while also providing the appropriate air volume for the middle occupant.

[0003] Waterproofing the blower's circuit board is a key issue. The key is to ensure the absolute sealing of the cavity housing the circuit board relative to the outside world, preventing the board from failing or short-circuiting due to water exposure during extended use. However, due to the need for external wiring, waterproofing has always been a difficult problem to solve.

[0004] Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a low-noise brushless motor that can solve the sealing and waterproofing problems at the lead wires and ensure the sealing between the installation cavity where the circuit board is located and the outside world.

[0006] The present disclosure provides a blower motor, comprising:

[0007] A circuit board module includes a base, an end cover, a first sealing member, and a circuit board. The base includes a housing with an open top. The end cover covers the top of the housing. A mounting cavity is formed between the end cover and the housing. The circuit board is disposed in the mounting cavity.

[0008] A wiring harness module, comprising a wiring harness port provided on the housing, and a wiring harness provided at the wiring harness port and electrically connected to the circuit board;

[0009] The first sealing member includes an end cover sealing ring and a wiring harness sealing member, wherein the end cover sealing ring has two opposite ends in the circumferential direction, the end cover sealing ring is sleeved on the housing and is circumferentially and radially limited, the two circumferential side walls of the wiring harness sealing member are recessed with grooves, the wiring harness sealing member is sleeved on the wiring harness port and is radially limited, the two opposite circumferential ends of the end cover sealing ring are embedded in the grooves of the wiring harness sealing member, and the end cover sealing ring abuts against the side walls of the wiring harness sealing member in the circumferential direction, and at least one side wall of the end cover sealing ring abuts against the side walls of the wiring harness sealing member in the radial direction;

[0010] The motor module includes a stator assembly and a rotor assembly. The stator assembly is electrically connected to the circuit board and drives the rotor assembly to rotate.

[0011] Optionally, the base further includes a sleeve formed at the bottom of the shell;

[0012] The housing includes a bottom plate and a side plate provided on one side of the bottom plate, the sleeve is provided on the other side of the bottom plate and passes through the bottom plate, and the side plate is provided with the wiring harness port;

[0013] The stator assembly is fixed to the outer wall of the sleeve, and the rotor assembly is rotatably connected to the sleeve;

[0014] The stator assembly includes a stator pin and a second seal. The stator pin passes through the housing and is electrically connected to the circuit board. The second seal is provided between the stator pin and the housing to seal a gap between the stator pin and the housing.

[0015] Optionally, the side panel includes a first flange and a second flange connected to the first flange, wherein the second flange is lower than the first flange to form the wire harness port on the side panel;

[0016] The end cover presses the end cover sealing ring and the wiring harness seal in the axial direction, and buckles and abuts against the outer side walls of the end cover sealing ring and the wiring harness seal in the radial direction, so as to limit the axial and radial positions of the end cover sealing ring and the wiring harness seal respectively;

[0017] The end cover sealing ring has a notch matching the wire harness opening, the end cover sealing ring is sleeved on the first flange, the notch coincides with the wire harness opening, the wire harness seal is sleeved on the second flange and circumferentially and radially connected to the end cover sealing ring at the notch;

[0018] The end cover is axially pressed onto the upper end surfaces of the end cover sealing ring and the wiring harness seal, and the outer edge of the end cover abuts against at least part of the inner and outer side walls of the end cover sealing ring and the wiring harness seal in the radial direction.

[0019] Optionally, the lower end surface of the end cover sealing ring has a groove, and the first flange is embedded in the groove.

[0020] Optionally, the groove of the end cover sealing ring and the first flange of the housing are in transition fit or interference fit, and the wall of the first flange abuts against the wall of the groove.

[0021] Optionally, a harness hole is provided on the harness seal, and the harness hole radially penetrates the inner wall and the outer wall of the harness seal. After the external harness passes through the harness hole, it is electrically connected to the circuit board, and the hole wall of the harness hole abuts against the harness.

[0022] Optionally, a first groove body is provided on the lower end face of the wiring harness seal, and a second groove body is provided on the two opposite side walls of the wiring harness seal. The two second groove bodies are located at both ends of the first groove body and are connected to the first groove body. The second flange is embedded in the first groove body, and the end heads of the end cover sealing ring on both sides of the notch are embedded in the second groove body and abut against the side walls of the second groove body.

[0023] Optionally, a guide portion is provided at the notch of the first slot body.

[0024] Optionally, the guide portion is a chamfer provided between the groove wall of the first groove body and the lower end surface of the wire harness seal.

[0025] Optionally, the first groove body of the wiring harness seal and the first flange are in a transition fit or an interference fit;

[0026] The second groove body of the wiring harness seal and the end of the end cover seal ring are in a transition fit or an interference fit.

[0027] Optionally, a first rib protruding toward the shell is provided on the end cover at a position corresponding to the end cover sealing ring. When the end cover presses the end cover sealing ring, the first rib squeezes the upper end surface of the end cover sealing ring.

[0028] Optionally, a limiting groove is further provided on the end cover at a position corresponding to the position of the wiring harness seal, and the upper end of the wiring harness seal is embedded in the limiting groove.

[0029] Optionally, a second rib protruding toward the housing is provided at the bottom of the limiting groove, and when the end cover presses the wiring harness seal, the second rib squeezes the upper end surface of the wiring harness seal.

[0030] Optionally, a limit block extending toward the shell is provided on the end cover at a position corresponding to the position of the wire harness seal. When the end cover is pressed onto the wire harness seal, the limit block abuts against the outer wall of the wire harness seal to prevent the wire harness seal from radially turning outward under the pulling of the wire harness. The limit block is offset from the wire harness hole on the wire harness seal.

[0031] Optionally, the end cover sealing ring and the wiring harness sealing member are both made of rubber.

[0032] Optionally, the base plate is provided with through holes corresponding one-to-one to the stator pins, the stator pins pass through the through holes and are electrically connected to a circuit board fixed on the base plate, the second seal is provided at the through holes to seal the gap between the wall of the through hole and the stator pins, and the two ends of the second seal respectively pass over the end surface of the base plate.

[0033] Optionally, the second sealing member includes a main rod, the main rod having a pin hole matching the shape of the stator pin, the stator pin passing through the pin hole and having an interference fit with the wall of the pin hole;

[0034] A plurality of first ribs are provided on the outer wall of the main rod at intervals along the axial direction, the first ribs extending along the circumference of the main rod, and the first ribs are interference fit with the wall of the through hole;

[0035] The second sealing member is made of rubber.

[0036] Optionally, the first rib surrounds the main rod, and / or,

[0037] The first rib surrounds the main rod for less than one circle, but the projections of the plurality of first ribs in the axial direction of the main rod form a circular ring shape.

[0038] Optionally, a top cap is further provided at one end of the main rod, the top cap abuts against the bottom plate, the pin hole passes through the top cap, and the radial dimension of the top cap is greater than the radial dimension of the first rib.

[0039] Optionally, a second rib is provided on the side of the top cap facing the circuit board, and the second rib surrounds the pin hole. When the circuit board is locked on the bottom plate, the circuit board presses the second rib, and a closed space is formed between the circuit board and the second rib.

[0040] Optionally, a plurality of connecting parts are provided on the periphery of the base.

[0041] The blower motor further includes a flange and a connecting assembly which is arranged in one-to-one correspondence with the connecting portion and is located inside the flange. The flange is sleeved on the periphery of the base, and the connecting portion is connected to the flange via the connecting assembly.

[0042] Optionally, the plurality of connection portions are evenly distributed around the periphery of the base; or, the plurality of connection portions are symmetrically arranged relative to the diameter of the base.

[0043] Optionally, the connecting portion includes a support seat extending radially along the base and a guide column provided on the support seat and extending axially, and the inner side of the flange has slots provided in a one-to-one correspondence with the guide columns;

[0044] Each of the connecting components includes a vibration damping pad and a locking piece. The vibration damping pad is embedded in the slot, and the guide column passes through the through hole in the middle of the vibration damping pad and is connected to the locking piece. The vibration damping pad is compressed between the support seat and the locking piece.

[0045] Optionally, the guide column has a hollow channel, and the inner wall of the channel is provided with an internal thread; the locking member includes a washer and a screw, and the threaded section of the screw passes through the inner hole of the washer and enters the channel of the guide column and is threadedly connected to the channel;

[0046] When the screw is threadedly locked with the guide post, the vibration damping pad is compressed between the gasket and the support seat.

[0047] Optionally, the diameter of the inner hole of the gasket is smaller than the diameter of the head of the screw, and the outer diameter of the gasket is larger than the diameter of the through hole on the vibration damping pad.

[0048] Optionally, the axis of the guide column is parallel to the axis of the sleeve on the base.

[0049] Optionally, the flange includes a flange plate and a protective plate arranged around the outer periphery of the flange plate, a flange hole is provided in the middle of the flange plate, the side plate of the base passes through the flange hole, and there is a gap between the hole wall of the flange hole and the side plate.

[0050] Optionally, a skirt plate is provided on the flange plate around the flange hole, and the slotted hole is provided on the skirt plate;

[0051] The vibration damping pad includes a vibration damping pad body, the through hole passes through the vibration damping pad body, the outer wall of the vibration damping pad body has an annular groove recessed toward the through hole, the annular groove is located in the middle of the vibration damping pad body in an axial direction, and the skirt plate is embedded in the annular groove;

[0052] The vibration damping pad is made of rubber.

[0053] Optionally, the upper end surface of the vibration damping pad body has a plurality of first buffer blocks protruding outward, and the lower end surface of the vibration damping pad body has a plurality of second buffer blocks protruding outward, the first buffer blocks abut against the gasket, and the second buffer blocks abut against the support seat.

[0054] Optionally, a reinforcing rib is provided on the hole wall of the through hole, and the position of the reinforcing rib corresponds to the position of the annular groove.

[0055] Optionally, the base is made of aluminum alloy.

[0056] Optionally, the stator assembly includes a plurality of winding stators arranged around the outer wall of the sleeve, the stator pins are electrically connected to the winding stators, and a bearing is provided in the sleeve; the rotor assembly includes a rotating shaft, a rotor housing fixed on the rotating shaft, and a plurality of rotors provided on the inner wall of the rotor housing, the rotating shaft enters the bearing, and the rotor surrounds the winding stator.

[0057] Optionally, a first mounting groove and a second mounting groove are provided in the sleeve along the axial direction, a first bearing is provided in the first mounting groove, and a second bearing is provided in the second mounting groove. The rotating shaft enters the first bearing and the second bearing and rotates with the first bearing and the second bearing.

[0058] Optionally, the blower motor further includes an impeller, the impeller including an impeller bracket and blades arranged around the impeller bracket, and one end of the rotating shaft extending out of the rotor housing is fixedly connected to the impeller bracket.

[0059] The implementation of the above scheme has the following beneficial effects:

[0060] This disclosure employs a first seal between the base and the end cap to seal the gap between the end cap and base. A second seal is also provided between the stator pins and the base to seal the gap between the stator pins and the base. This creates a sealed mounting cavity between the base and the end cap, protecting the circuit board within the cavity from moisture or water. The external wiring harness connects to the circuit board through the first seal, which is made of flexible rubber and tightly wraps the wiring harness, ensuring a waterproof seal at the lead wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] FIG1 is a schematic structural diagram of a blower motor provided by an embodiment of the present invention.

[0062] FIG2 is a schematic structural diagram of a blower motor provided in an embodiment of the present invention.

[0063] FIG3 is a cross-sectional view of a blower motor provided in an embodiment of the present invention.

[0064] FIG4 is a schematic structural diagram of a circuit board module in a blower motor provided in an embodiment of the present invention.

[0065] FIG5 is an exploded view of a circuit board module in a blower motor provided by an embodiment of the present invention.

[0066] FIG6 is a cross-sectional view of a circuit board module in a blower motor provided by an embodiment of the present invention.

[0067] FIG7 is a schematic structural diagram of an end cover in a circuit board module provided in an embodiment of the present invention.

[0068] FIG8 is a schematic structural diagram of a base in a circuit board module provided by an embodiment of the present invention.

[0069] FIG9 is a schematic structural diagram of an end cover sealing ring in a circuit board module provided by an embodiment of the present invention.

[0070] FIG10 is a schematic structural diagram of a wiring harness seal in a circuit board module provided by an embodiment of the present invention.

[0071] FIG11 is a schematic diagram of a partial structure of a circuit board module provided in an embodiment of the present invention.

[0072] FIG12 is a schematic diagram of the internal structure of the circuit board module provided in an embodiment of the present invention.

[0073] FIG13 is a schematic structural diagram of a second sealing member of a circuit board module provided in an embodiment of the present invention.

[0074] FIG14 is a cross-sectional view of a second sealing member of a circuit board module provided in an embodiment of the present invention.

[0075] FIG15 is an exploded view of a partial structure of a blower motor provided in an embodiment of the present invention.

[0076] FIG16 is a cross-sectional view of the connection between the flange and the base provided in an embodiment of the present invention.

[0077] FIG17 is a schematic structural diagram of a vibration damping pad provided in an embodiment of the present invention assembled on a flange.

[0078] FIG18 is a schematic structural diagram of a flange provided in an embodiment of the present invention.

[0079] FIG19 is a schematic structural diagram of a vibration damping pad provided in an embodiment of the present invention.

[0080] FIG20 is a top view of the vibration damping pad provided in an embodiment of the present invention.

[0081] In the figure: 100 circuit board module, 101 base, 102 housing, 103 sleeve, 104 first mounting slot, 105 second mounting slot, 106 bottom plate, 107 through hole, 108 side plate, 109 harness opening, 110 first flange, 111 second flange, 112 connecting portion, 113 support seat, 114 guide column, 115 channel, 116 end cover, 117 first rib, 118 limiting groove, 119 second rib, 120 limiting block, 121 mounting cavity, 122 circuit board, 124 end cover sealing ring, 125 notch, 126 groove, 127 harness seal, 128 harness hole, 129 first slot, 130 second slot, 131 guide portion, 132 harness, 133 second seal, 134 main rod, 135 pin hole, 136 first rib, 137 top cap, 138 second rib, 200 motor module, 201 winding stator, 202 stator pin, 203 first bearing, 204 second bearing, 205 shaft, 206 rotor housing, 207 rotor, 300 flange, 301 slotted hole, 302 flange plate, 303 guard plate, 304 flange hole, 305 skirt plate, 400 vibration damping pad, 401 vibration damping pad body, 402 annular groove, 403 through hole, 404 reinforcing rib, 405 first buffer block, 406 second buffer block, 500 locking piece, 501 gasket, 502 internal hole, 503 screw, 504 threaded segment, 505 head, 600 impeller, 601 impeller bracket, 602 blade. DETAILED DESCRIPTION

[0082] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0083] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0084] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0085] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0086] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0087] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0088] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0089] This embodiment provides a blower motor for use in an automobile, mounted in the armrest compartment, to assist the front blower in delivering airflow to the rear seat. The blower motor comprises at least a motor module 200, a circuit board module 100, a wiring harness module, and an impeller 600. The wiring harness module connects an external power source to the circuit board module 100, the circuit board module 100 connects to the motor module 200 to supply power, and the impeller 600 is fixed to the motor module 200 and rotates under the power of the motor module 200.

[0090] Referring to Figures 1-6 , the circuit board module 100 includes a base 101, an end cap 116, and a circuit board 122. The base 101 includes a housing 102 with an open top and a sleeve 103 formed at the bottom of the housing 102. The end cap 116 covers the top of the housing 102, forming a mounting cavity 121 between the end cap 116 and the housing 102. The circuit board 122 is disposed in the mounting cavity 121. The motor module 200 includes a stator assembly fixed to the outer wall of the sleeve 103 and a rotor 207 assembly rotatably connected to the sleeve 103. The wiring harness assembly includes a wiring harness port 109 arranged on the housing 102, and a wiring harness 132 arranged at the wiring harness port 109 and electrically connected to the circuit board 122; the first seal includes an end cover sealing ring 124 and a wiring harness seal 127, the end cover sealing ring 124 has two ends arranged opposite to each other in the circumferential direction, the end cover sealing ring 124 is sleeved on the housing 102 and is limited in the circumferential and radial directions, and the two circumferential side walls of the wiring harness seal 127 are recessed with a groove body, the wiring harness seal 127 is sleeved on the wiring harness port 109 and is limited in the radial direction, and the two opposite circumferential ends of the end cover sealing ring 124 are embedded in the groove body of the wiring harness seal 127, and the end cover sealing ring 124 abuts against the side wall of the wiring harness seal 127 in the circumferential direction, and at least one side wall of the end cover sealing ring 124 abuts against the side wall of the wiring harness seal 127 in the radial direction. It is also worth noting that the end cap 116 presses the end cap seal 124 and the harness seal 127 axially, and buckles and abuts the outer wall of the end cap seal 124 and the harness seal 127 radially, so as to respectively limit the axial and radial positions of the end cap seal 124 and the harness seal 127. Through the above-mentioned arrangement, firstly, the end cap seal 124 and the harness seal 127 are both radially limited by the housing 102, and secondly, the harness seal 127 can further radially limit the end cap seal 124, and finally, the end cap 116 respectively limits the end cap seal 124 and the harness seal 127 axially and radially. The interlocking structural design, especially in the use requirement of small installation space, enables the motor to always maintain structural stability in a vibrating working environment and when components such as the harness are subjected to external forces, thereby maintaining the working environment sealing of the circuit board 122 and solving the sealing and waterproofing problem at the lead wire.

[0091] The stator assembly includes multiple stator windings 201 arranged around the outer wall of the sleeve 103 and stator pins 202 electrically connected to the stator windings 201. The stator pins 202 axially extend through the housing 102 and are electrically connected to the circuit board 122. Bearings are located within the sleeve 103. The rotor 207 assembly includes a rotating shaft 205, a rotor housing 206 fixed to the rotating shaft 205, and multiple rotors 207 located on the inner wall of the rotor housing 206. The rotors 207 surround the stator windings 201, and the rotating shaft 205 enters the bearings, which are rotatably connected to the sleeve 103. Current is conducted to the stator windings 201 through the circuit board 122 and the stator pins 202. The magnetic field generated by the stator windings 201 interacts with the magnetic field of the rotor 207, driving the rotor 207 assembly to rotate as a whole, which in turn drives the impeller 600.

[0092] In one possible implementation, referring to FIG. 6 , a first mounting groove 104 and a second mounting groove 105 are axially spaced apart in the sleeve 103 , a first bearing 203 is provided in the first mounting groove 104 , a second bearing 204 is provided in the second mounting groove 105 , and the rotating shaft 205 enters the first bearing 203 and the second bearing 204 and rotates with the first bearing 203 and the second bearing 204 .

[0093] The impeller 600 includes an impeller bracket 601 and blades 602 arranged around the impeller bracket 601. One end of the rotating shaft 205 extending out of the rotor housing 206 is fixedly connected to the impeller bracket 601. There are multiple blades 602, and the multiple blades 602 all extend along the axial direction and are evenly spaced axially around the rotating shaft 205. There is a gap between two adjacent blades for blowing air. The blower motors in this application are selected in two numbers during operation. The impellers 600 of the two blower motors are arranged opposite each other, and the air inlet direction is perpendicular to the axial direction, so that when the impellers rotate at high speed, they can evenly and powerfully relay the wind in the air duct.

[0094] Waterproofing the circuit board 122 of the blower motor is one of the important problems to be solved. The main purpose is to ensure that the cavity where the circuit board 122 is installed is absolutely sealed relative to the outside, so as to ensure that the circuit board 122 will not fail or short-circuit during long-term use due to water. However, since the circuit board 122 needs to be wired to the outside, it is difficult to solve the waterproofing problem. In response to this problem, the embodiment of the present invention provides a first seal between the shell 102 and the end cover 116 to block the gap between the end cover 116 and the shell 102, and provides a second seal 133 between the stator pin 202 and the shell 102 to block the gap between the stator pin 202 and the shell 102, thereby constructing a relatively closed space between the base 101 and the end cover 116 to prevent external moisture from entering and causing damage to the circuit board 122.

[0095] 5 to 8 , the housing 102 includes a bottom plate 106 and a side plate 108. The side plate 108 and the sleeve 103 are respectively arranged on opposite sides of the bottom plate 106. The sleeve 103 has an opening 109 extending through the bottom plate 106. The side plate 108 is provided with a harness opening 109 for the passage of an external harness 132. The first seal includes an end cap seal ring 124 and a harness seal 127. The cross-section of the end cap seal is in the shape of an inverted U. The end cap seal ring 124 is sleeved on the side plate 108 and can wrap the edge of the side plate 108. The harness seal 127 is sleeved on the harness opening 109 and can also wrap the edge of the harness opening 109. The end cap 116 presses the end cap seal ring 124 and the harness seal 127 tightly. The harness seal 127 is provided with a harness hole 128, which extends through the inner and outer walls of the harness seal 127. An external harness 132 passes through the harness hole 128 and is electrically connected to the circuit board 122. The diameter of the harness hole 128 can be the same as or slightly smaller than the diameter of the harness 132. When the harness 132 passes through the harness hole 128, it abuts against the wall of the hole 128, preventing a gap from forming at the connection between the two, thereby preventing external moisture from entering the installation cavity 121 through the gap.

[0096] The end cap seal 124 and harness seal 127 are both made of rubber and deform when subjected to compression from the housing 102, end cap 116, or harness 132, thereby sealing any gaps. The base 101 is made of aluminum alloy, which offers low mass and excellent heat dissipation. Compared to rubber, it is also harder, ensuring that the structure remains stable under both tightening forces and tension from the harness.

[0097] In one possible implementation, referring to FIG8 , the side plate 108 includes a first flange 110 and a second flange 111 connected to the first flange 110. The second flange 111 is lower than the first flange 110 to form the wiring harness opening 109 on the side plate 108. The end cap seal 124 has a notch 125 that matches the wiring harness opening 109. The end cap seal 124 is fitted onto the first flange 110, with the notch 125 coinciding with the wiring harness opening 109. The wiring harness seal 127 is fitted onto the second flange 111 and connected to the end cap seal 124 at the notch 125. The end cap 116 is axially press-fitted onto the upper end surfaces of the end cap seal 124 and the wiring harness seal 127.

[0098] Referring to Figure 9 , the lower end surface of the end cap seal ring 124 is provided with a groove 126. When the end cap seal ring 124 is mounted on the base 101, the first flange 110 is embedded in the groove 126. A transition fit or interference fit is formed between the groove 126 of the end cap seal ring 124 and the first flange 110 of the housing 102, so that the wall of the first flange 110 abuts the wall of the groove 126, thereby achieving a better seal. The transition fit makes installation easier. Furthermore, the housing 102 can limit the radial and axial positions of the end cap seal ring 124, allowing the end cap seal ring 124 to remain tightly fitted with surrounding parts even when subjected to force, ensuring good sealing performance during use.

[0099] Please refer to Figure 10. The lower end surface of the wiring harness seal 127 is provided with a first groove body 129, and the two opposite side walls of the wiring harness seal 127 are provided with a second groove body 130. The two second groove bodies 130 are located at both ends of the first groove body 129 and are connected to the first groove body 129, forming a U-shaped annular groove 402 on the outer periphery of the wiring harness seal 127. When the wiring harness seal 127 is mounted on the base 101, the second flange 111 is embedded in the first groove body 129, and the first groove body 129 of the wiring harness seal 127 and the first flange 110 are in a transition fit or interference fit. The end heads on both sides of the notch 125 of the end cover sealing ring 124 are embedded in the second groove body 130, and the second groove body 130 of the wiring harness seal 127 and the end heads of the end cover sealing ring 124 are in a transition fit or interference fit. The second groove body 130 can wrap the end heads of the end cover sealing ring 124 to achieve mutual limitation in the radial and circumferential directions. The lower end of the harness seal 127 is supported by the second flange 111. The two sides of the harness seal 127 engage with the end cover seal 124 to form a complete circle, filling the harness opening 109 on the housing 102. The end cover 116 simultaneously presses the harness seal 127 and the end cover seal 124, so that the connection between the end cover 116 and the housing 102 is sealed. During the installation process, the harness 132 is usually subjected to radial tension. By limiting the housing 102, the end cover seal 124, and the harness seal 127, and taking advantage of the better hardness of the housing 102 and the end cover 116 compared to rubber, the structure of this part remains stable. Therefore, during long-term use, the sealing performance of this part can still be maintained in a good state.

[0100] In one possible implementation, a guide portion 131 is provided at the notch of the first groove 129. The guide portion 131 enlarges the diameter of the notch. When the end cap seal 124 is fitted onto the first flange 110, the guide portion 131 facilitates the first flange 110's entry into the groove, thereby enhancing installation convenience. In actual use, the guide portion 131 can be a chamfered angle between the groove wall of the first groove 129 and the lower end surface of the wiring harness seal 127.

[0101] In one possible implementation, referring to FIG. 7 , a first rib 117 protruding toward the housing 102 is provided on the end cap 116 at a position corresponding to the end cap sealing ring 124. When the end cap 116 is pressed against the end cap sealing ring 124, the first rib 117 squeezes the upper end surface of the end cap sealing ring 124. Specifically, because the end cap sealing ring 124 is made of rubber and is subject to deformation under compression, when the end cap 116 is pressed against the end cap sealing ring 124, the first rib 117 is embedded in the upper surface of the end cap sealing ring 124, so that the contact surfaces of the two are tightly fitted without any gaps.

[0102] In one possible implementation, a retaining groove 118 is further provided on the end cap 116 at a position corresponding to the position of the wire harness seal 127, and the upper end of the wire harness seal 127 is embedded in the retaining groove 118. This embodiment not only retains the position of the three outer surfaces (the lower end surface and two opposing side surfaces) of the wire harness seal 127, but also further retains the position of the upper end of the wire harness seal 127 through the retaining groove 118 on the end cap 116. When the external wire harness 132 is pulled, the wire harness seal 127 is unlikely to turn outward or fall out.

[0103] Furthermore, in order to prevent the wire harness seal 127 from falling out and to enhance the stability of the connection of the wire harness seal 127, a stop block 120 is provided on the end cover 116 at a position corresponding to the position of the wire harness seal 127. The stop block 120 extends toward the housing 102. When the end cover 116 is pressed onto the wire harness seal 127, the stop block 120 is close to or abuts against the outer side wall of the wire harness seal 127 to prevent the wire harness seal 127 from turning outward when pulled by the wire harness 132. There can be one or more wire harness holes 128 on the wire harness seal 127. The number of wire harness holes 128 can be consistent with the number of wire harnesses 132 to be pulled. At the same time, the stop block 120 and the wire harness holes 128 on the wire harness seal 127 are staggered to avoid positional interference between the stop block 120 and the wire harness 132. In addition, in order to ensure that the wire harness 132 can smoothly pass through the wire harness hole 128 by adhering to the inner wall of the wire harness hole 128, the wire harness hole 128 is opened in the upper part of the wire harness seal 127 in this embodiment, and the wire harness hole 128 is exposed from the upper end surface of the wire harness seal 127, that is, the upper end surface of the wire harness seal 127 forms a gap connecting the wire harness hole 128, and the gap provides a deformation space for the wire harness seal 127. When the wire harness 132 is passed through the wire harness hole 128, the wire harness hole 128 is stretched open and the gap is expanded, which can reduce the resistance of the wire harness 132 passing through the wire harness hole 128.

[0104] Optionally, please continue to refer to Figure 7. The bottom of the limiting groove 118 is also provided with a second rib 119 protruding toward the shell 102. When the end cover 116 presses the wiring harness seal 127, the second rib 119 will be squeezed until it is embedded in the upper end surface of the wiring harness seal 127 so that the two are tightly fitted without any gaps.

[0105] Stator pins 202 need to pass through base plate 106 and into mounting cavity 121 to electrically connect with circuit board 122. Therefore, through-holes 107 are required in base plate 106. After stator pins 202 are installed, through-holes 107 need to be sealed. In this embodiment, a second sealing member 133 seals the connection between the pins and through-holes 107. Referring to Figure 6, circuit board 122 is secured to base plate 106. Base plate 106 is provided with through-holes 107 corresponding to the stator pins 202. Stator pins 202 pass through these through-holes 107 to electrically connect with circuit board 122. Second sealing members 133 are provided at these through-holes 107 to seal the gap between the walls of through-hole 107 and the stator pins 202. Second sealing member 133 is made of rubber. When the circuit board is locked, stator pins 202 are electrically connected and secured to the circuit board via soldering.

[0106] In one possible implementation, the second seal 133 includes a main rod 134 having a pinhole 135 shaped to match the stator pin 202. The stator pin 202 is inserted into the pinhole 135 and forms an interference fit with the wall of the pinhole 135. The pinhole 135 extends along the long axis of the main rod 134. A plurality of first ribs 136 are axially spaced apart on the outer wall of the main rod 134. These first ribs 136 extend circumferentially along the main rod 134 and form an interference fit with the wall of the through hole 107. This ensures a waterproof and dustproof seal while also facilitating the insertion of the second seal 133. It is worth noting that, in the axial direction, the upper and lower ends of the main rod 134 extend beyond the end surface of the base plate 106.

[0107] The first rib 136 surrounds the main rod 134 for one full circle, and / or the first rib 136 surrounds the main rod 134 for less than one full circle, but the projections of the multiple first ribs 136 in the axial direction of the main rod 134 form a circular ring. The diameter of the main rod 134 is equal to or slightly smaller than the diameter of the through hole 107. The diameter of the circular ring formed by a single first rib 136 or multiple first ribs 136 is larger than the diameter of the through hole 107. After the second sealing member 133 is installed in the through hole 107, the first rib 136 tightly abuts the wall of the through hole 107, blocking the gap between the through hole 107 and the main rod 134, thereby achieving a seal. In the structure shown in Figure 13, the main rod 134 is a columnar structure as a whole, and two first ribs 136 are arranged on the outer wall of the main rod 134 at intervals. Each first rib 136 surrounds the outer wall of the main rod 134, one of the first ribs 136 surrounds the lower part of the main rod 134, and the other first rib 136 surrounds the middle part of the main rod 134; the diameter of the main rod 134 is equal to or slightly smaller than the diameter of the through hole 107, and the diameter of the first rib 136 is larger than the diameter of the through hole 107.

[0108] Optionally, a top cap 137 is further provided at one end of the main rod 134. The top cap 137 abuts the bottom plate 106. The pin hole 135 extends through the top cap 137. The radial dimension of the top cap 137 is greater than the radial dimension of the first rib 136. After the second sealing member 133 is installed in the through hole 107, the top cap 137 is retained in the installation cavity 121. The lower end surface of the top cap 137 abuts the bottom plate 106, and the upper end surface of the top cap 137 abuts the circuit board 122. When the circuit board 122 is locked to the bottom plate 106, the circuit board 122 squeezes the top cap 137, causing the top cap 137 to deform and tightly fit the bottom plate 106 and the circuit board 122, achieving a sealed connection between the two.

[0109] Furthermore, referring to Figures 6, 13 and 14, a second rib 138 is provided on the side of the top cap 137 facing the circuit board 122. The second rib 138 surrounds the pin hole 135. Since the second sealing member 133 is made of rubber and has deformation characteristics, when the circuit board 122 is locked on the bottom plate 106, the circuit board 122 will flatten the second rib 138, so that the second rib 138 fits tightly against the circuit board 122, thereby forming a closed space between the circuit board 122 and the second rib 138, thereby achieving sealing at the stator pin 202 and preventing moisture intrusion.

[0110] The mounting flange 300 serves as a fixed connection between the blower and the air-conditioning housing. The axial vibration of the blower motor is easily transmitted to the mounting flange 300, and then to the air-conditioning housing, causing the disadvantage of loud noise. In addition, due to spatial structural limitations, the center rear blower has size limitations and is smaller than the front blower, which increases the difficulty of vibration reduction. Currently, there is an urgent need to solve the vibration reduction problem between the motor of the center rear blower and the mounting flange 300 on the basis of meeting the small-size structural requirements of the center rear blower. To this end, this embodiment provides the following technical solution, which achieves the purpose of vibration reduction by setting a vibration-damping pad 400 between the flange 300 and the base 101 of the motor.

[0111] Please refer to Figures 15 and 16. The outer periphery of the base 101 is provided with a plurality of connecting parts 112. The blower motor includes a flange 300 and a connecting assembly corresponding to the connecting part 112. The flange 300 is sleeved on the outer periphery of the base 101, and the connecting part 112 is connected to the flange 300 through the connecting assembly. Compared with the blower motor in the prior art, such as a conventional blower motor, the setting method of the present application saves space. First, a conventional blower motor needs to be provided with two flanges 300 that are relatively fastened to form a cooling air duct. Therefore, the vibration reduction position can only be set on the outer periphery 300 of the flange. However, the blower motor in the present application acts as an auxiliary booster and generates less heat. Therefore, one flange 300 is omitted and only one flange 300 is used. The present application transfers the vibration reduction position from the outer periphery of the flange 300 to the inner side through structural changes. Second, the above-mentioned setting method of the present application makes the overall structure of the blower motor miniaturized.

[0112] The plurality of connection parts 112 are evenly spaced around the periphery of the base 101. Of course, in other embodiments, the connection parts 112 may not be arranged in the aforementioned manner, but may be symmetrically arranged relative to the diameter of the base 101 to maintain overall stability and ensure uniform vibration reduction.

[0113] In one possible implementation, the connection portion 112 includes a support seat 113 extending radially along the base 101 and a guide post 114 extending axially on the support seat 113. The axis of the guide post 114 is parallel to the axis of the sleeve 103 on the base 101. The flange 300 has slots 301 corresponding to the guide posts 114. Each connection assembly includes a vibration damping pad 400 and a locking member 500. The vibration damping pad 400 is embedded in the slot 301. The guide post 114 passes through a through hole 403 in the middle of the vibration damping pad 400 and is connected to the locking member 500. The vibration damping pad 400 is compressed between the support seat 113 and the locking member 500. The vibration damping pad 400 is made of rubber and can be compressed to produce deformation. In the structure shown in Figure 8, three connection portions 112 are provided on the periphery of the base 101, and the three guide posts 114 are evenly arranged around the circumference of the base 101.

[0114] Referring to Figures 12 and 16 , the guide post 114 has a hollow channel 115, the inner wall of which is internally threaded. The locking member 500 includes a washer 501 and a screw 503. The threaded section 504 of the screw 503 passes through the internal hole 502 of the washer 501 and enters the channel 115 of the guide post 114, where it is threadedly connected. When the screw 503 is threadedly locked with the guide post 114, the vibration-damping pad 400 is compressed between the washer 501 and the support base 113. It is worth noting that the screwing depth of the screw 503 is adjustable: if the vibration-damping pad 400 is compressed too tightly, the vibration-damping effect between the flange 300 and the motor will be poor; if it is compressed too loosely, the motor will be unreliable, prone to shaking, and may interfere with the air conditioner housing. The optimal vibration-damping effect can be achieved by adjusting the screw 503's screwing depth.

[0115] Specifically, the diameter of the inner hole 502 of the gasket 501 is smaller than the diameter of the head 505 of the screw 503 , and the outer diameter of the gasket 501 is larger than the diameter of the through hole 403 on the vibration damping pad 400 .

[0116] Referring to Figures 17 and 18 , the flange 300 includes a flange plate 302 and a guard plate 303 disposed around the periphery of the flange plate 302. A flange hole 304 is defined in the center of the flange plate 302, through which the side plate 108 of the base 101 passes. The shape of the flange hole 304 matches the periphery of the side plate 108, and a gap exists between the wall of the flange hole 304 and the side plate 108. A skirt plate 305 is defined around the flange plate 302, and the slotted hole 301 is formed in the skirt plate 305. The skirt plate 305 is positioned between the upper and lower end surfaces of the guard plate 303. Optionally, the skirt plate 305 is located in the axially central region of the guard plate 303.

[0117] In one possible implementation, the vibration damping pad 400 includes a vibration damping pad body 401. The through hole 403 passes through the vibration damping pad body 401. The outer wall of the vibration damping pad body 401 has an annular groove 402 that is recessed toward the through hole 403. The annular groove 402 is located in the axial middle of the vibration damping pad body 401, and the skirt plate 305 is embedded in the annular groove 402. The sidewall of the annular groove 402 abuts against the skirt edge of the flange 300, limiting the vibration damping pad 400 in the axial direction.

[0118] Optionally, the upper end surface of the vibration damping pad body 401 has a plurality of outwardly protruding first buffer blocks 405, and the lower end surface of the vibration damping pad body 401 has a plurality of outwardly protruding second buffer blocks 406, wherein the first buffer blocks 405 abut the gasket 501, and the second buffer blocks 406 abut the support seat 113. In the structure shown in FIG19 , the upper end surface of the vibration damping pad body 401 is provided with a plurality of first buffer blocks 405, and the plurality of first buffer blocks 405 are evenly distributed around the through holes 403 on the vibration damping pad body 401; the lower end surface of the vibration damping pad body 401 is provided with a plurality of second buffer blocks 406, and the plurality of second buffer blocks 406 are evenly distributed around the through holes 403 on the vibration damping pad body 401.

[0119] Furthermore, as shown in FIG. 20 , a reinforcing rib 404 is provided on the hole wall of the through hole 403 . The position of the reinforcing rib 404 corresponds to the position of the annular groove 402 , thereby strengthening the structure of the vibration damping pad 400 .

[0120] The installation method of this embodiment is as follows: 1. First, embed the vibration damping pad 400 in the slot 301 of the flange 300; 2. Put the flange 300 as a whole on the periphery of the base 101, and the guide column 114 on the base 101 passes through the through hole 403 on the vibration damping pad 400, and the lower end face of the vibration damping pad 400 abuts the support seat 113; 3. Place the gasket 501 on the upper end face of the vibration damping pad 400, and the screw 503 passes through the gasket 501 and is screwed into the guide column 114 to compress the vibration damping pad 400 by applying pressure to the gasket 501 until the vibration damping pad 400 is compressed to a preset amount, so that the vibration damping pad 400 is pressed between the gasket 501 and the support seat 113.

[0121] This embodiment achieves vibration reduction through the use of the aforementioned vibration-damping pad 400. This reduces the number of components in the overall vibration-damping structure and achieves high integration, meeting the requirements of a compact design. After being compressed, the first and second buffer blocks 405, 406 of the vibration-damping pad 400 still protrude axially from the end surface of the guide post 114, providing a suitable elastic force, thereby effectively reducing motor vibration and transferring it to the flange 300.

[0122] It is worth noting that due to the particularity of the installation position of the center rear blower of the present application, its small size and low heat generation, the center rear blower of the present application saves its own air duct for cooling the motor compared to the existing front blower.

[0123] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A blower motor, characterized in that, Comprising: A circuit board module (100), including a base (101), an end cap (116), a first seal, and a circuit board (122). The base (101) includes a housing (102) with an open top. The end cap (116) covers the top of the housing (102), and an installation cavity (121) is formed between the end cap (116) and the housing (102). The circuit board (122) is disposed in the installation cavity (121); A wire harness module, including a wire harness port (109) provided on the housing (102) and a wire harness (132) provided at the wire harness port (109) and electrically connected to the circuit board (122); The first seal includes an end cap seal ring (124) and a wire harness seal (127). The end cap seal ring (124) has two opposite ends in the circumferential direction. The end cap seal ring (124) is sleeved on the housing (102) and is circumferentially and radially limited. The two side walls of the wire harness seal (127) in the circumferential direction are both recessed with grooves. The wire harness seal (127) is sleeved on the wire harness port (109) and is radially limited. The two opposite ends of the end cap seal ring (124) in the circumferential direction are embedded in the grooves of the wire harness seal (127), and the end cap seal ring (124) abuts against the side wall of the wire harness seal (127) in the circumferential direction, and at least one side wall of the end cap seal ring (124) abuts against the side wall of the wire harness seal (127) in the radial direction; A motor module (200), including a stator assembly and a rotor assembly. The stator assembly is electrically connected to the circuit board (122) and drives the rotor assembly to rotate.

2. The blower motor according to claim 1, wherein The base (101) further includes a sleeve formed at the bottom of the housing (102); The housing (102) includes a bottom plate (106) and a side plate (108) provided on one side of the bottom plate (106). The sleeve (103) is provided on the other side of the bottom plate (106) and penetrates the bottom plate (106). The wire harness port (109) is provided on the side plate (108); The stator assembly is fixed on the outer wall of the sleeve (103), and the rotor assembly is rotatably connected to the sleeve (103) The stator assembly includes a stator pin (202) and a second seal (133). The stator pin (202) passes through the housing (102) and is electrically connected to the circuit board (122). The second seal (133) is provided between the stator pin (202) and the housing (102) to block the gap between the stator pin (202) and the housing.

3. The blower motor according to claim 2, wherein The side plate (108) includes a first flange (110) and a second flange (111) connected to the first flange (110). The second flange (111) is lower than the first flange (110) to form the wire harness port (109) on the side plate (108) The end cap (116) axially presses the end cap sealing ring (124) and the wire harness seal (127), and radially clamps and abuts against the outer side walls of the end cap sealing ring (124) and the wire harness seal (127) to axially and radially limit the end cap sealing ring (124) and the wire harness seal (127) respectively; The end cap sealing ring (124) has a notch (125) matching the wire harness opening (109). The end cap sealing ring (124) is sleeved on the first flange (110), the notch (125) coincides with the wire harness opening (109), and the wire harness seal (127) is sleeved on the second flange (111) and is circumferentially and radially connected to the end cap sealing ring (124) at the notch (125); The end cap (116) is axially pressed against the upper end faces of the end cap sealing ring (124) and the wire harness seal (127), and the outer edge of the end cap (116) radially abuts against at least part of the inner and outer side walls of the end cap sealing ring (124) and the wire harness seal (127) respectively.

4. The blower motor according to claim 3, wherein the lower end face of the end cap sealing ring (124) has a groove (126), and the first flange (110) is embedded in the groove (126).

5. The blower motor according to claim 4, wherein a transition fit or an interference fit is provided between the groove (126) of the end cap sealing ring (124) and the first flange (110) of the housing (102), and the wall of the first flange (110) abuts against the wall of the groove (126).

6. The blower motor according to claim 3, wherein a wire harness hole (128) is provided on the wire harness seal (127). The wire harness hole (128) radially penetrates the inner side wall and the outer side wall of the wire harness seal (127). The external wire harness (132) passes through the wire harness hole (128) and is electrically connected to the circuit board (122), and the hole wall of the wire harness hole (128) abuts against the wire harness (132).

7. The blower motor according to claim 3, wherein a first groove (129) is provided on the lower end face of the wire harness seal (127), and second grooves (130) are provided on two opposite side walls of the wire harness seal (127). The two second grooves (130) are located at both ends of the first groove (129) and communicate with the first groove (129). The second flange (111) is embedded in the first groove (129), and the ends of the end cap sealing ring (124) on both sides of the notch (125) are embedded in the second grooves (130) and abut against the side walls of the second grooves (130).

8. The blower motor according to claim 7, wherein a guiding portion (131) is provided at the notch of the first groove (129).

9. The blower motor according to claim 8, wherein The guiding portion (131) is a chamfer provided between the groove wall of the first groove body (129) and the lower end surface of the wire harness seal (127).

10. The blower motor according to claim 7, characterized in that a transition fit or an interference fit is provided between the first groove body (129) of the wire harness seal (127) and the first flange (110); a transition fit or an interference fit is provided between the second groove body (130) of the wire harness seal (127) and the end of the end cover seal ring (124).

11. The blower motor according to claim 3, characterized in that a first rib (117) protruding towards the housing (102) is provided at a position corresponding to the end cover seal ring (124) on the end cover (116). When the end cover (116) presses the end cover seal ring (124), the first rib (117) presses the upper end surface of the end cover seal ring (124).

12. The blower motor according to claim 3, characterized in that a limiting groove (118) is further provided at a position corresponding to the wire harness seal (127) on the end cover (116), and the upper end of the wire harness seal (127) is embedded in the limiting groove (118).

13. The blower motor according to claim 12, characterized in that a second rib (119) protruding towards the housing (102) is provided at the bottom of the limiting groove (118). When the end cover (116) presses the wire harness seal (127), the second rib (119) presses the upper end surface of the wire harness seal (127).

14. The blower motor according to claim 3 or 12, characterized in that a limiting block (120) extending towards the housing (102) is further provided at a position corresponding to the wire harness seal (127) on the end cover (116). When the end cover (116) is pressed on the wire harness seal (127), the limiting block (120) abuts against the outer side wall of the wire harness seal (127) to prevent the wire harness seal (127) from turning outwards radially under the traction of the wire harness (132). The limiting block (120) is arranged in a dislocation manner with the wire harness hole (128) on the wire harness seal (127).

15. The blower motor according to claim 2, characterized in that both the end cover seal ring (124) and the wire harness seal (127) are made of rubber material.

16. The blower motor according to claim 2, characterized in that through holes (107) corresponding to the stator pins (202) one by one are provided on the bottom plate (106). The stator pins (202) pass through the through holes (107) and are electrically connected to a circuit board (122) fixed on the bottom plate (106). The second seal (133) is arranged at the through holes (107) to block the gap between the wall of the through holes (107) and the stator pins (202). Both ends of the second seal (133) respectively extend beyond the end surface of the bottom plate (106).

17. The blower motor according to claim 16, wherein the second seal (133) includes a main rod (134), the main rod (134) is provided with a pin hole (135) matching the shape of the stator pin (202), and the stator pin (202) penetrates into the pin hole (135) and is in interference fit with the wall of the pin hole (135); a plurality of first ribs (136) are axially spaced on the outer wall of the main rod (134), the first ribs (136) extend along the circumferential direction of the main rod (134), and the first ribs (136) are in interference fit with the wall of the through hole (107); the second seal (133) is made of rubber.

18. The blower motor according to claim 17, wherein the first rib (136) surrounds the main rod (134) for one week, and / or the first rib (136) does not surround the main rod (134) for one week, but the projections of the plurality of first ribs (136) in the axial direction of the main rod (134) form an annular shape.

19. The blower motor according to claim 17, wherein a top cap (137) is further provided at one end of the main rod (134), the top cap (137) abuts against the bottom plate (106), the pin hole (135) penetrates through the top cap (137), and the radial dimension of the top cap (137) is larger than the radial dimension of the first rib (136).

20. The blower motor according to claim 19, wherein a second rib (138) is provided on one side of the top cap (137) facing the circuit board (122), the second rib (138) surrounds the pin hole (135), when the circuit board (122) is locked on the bottom plate (106), the circuit board (122) presses the second rib (138), and a sealed space is formed between the circuit board (122) and the second rib (138).

21. The blower motor according to claim 2, wherein a plurality of connecting parts (112) are provided on the outer periphery of the base (101), the blower motor further includes a flange (300) and a connecting component provided corresponding to the connecting parts (112) one by one and located inside the flange (300), the flange (300) is sleeved outside the base (101), and the connecting parts (112) are connected to the flange (300) through the connecting component.

22. The blower motor according to claim 21, wherein the plurality of connecting parts (112) are evenly distributed at intervals around the outer periphery of the base (101); or, the plurality of connecting parts (112) are symmetrically arranged with respect to the diameter of the base (101).

23. The blower motor according to claim 21, wherein The connecting portion (112) includes a support base (113) extending radially along the base (101) and a guiding post (114) provided on the support base (113) and extending axially. The inner side of the flange (300) has slot holes (301) arranged in one-to-one correspondence with the guiding posts (114). Each connecting component includes a shock-absorbing pad (400) and a locking member (500). The shock-absorbing pad (400) is embedded in the slot hole (301). After the guiding post (114) passes through a through-hole (403) in the middle of the shock-absorbing pad (400), it is connected to the locking member (500). The shock-absorbing pad (400) is compressed between the support base (113) and the locking member (500).

24. The blower motor according to claim 23, wherein The guiding post (114) has a hollow channel (115), and an internal thread is provided on the inner wall of the channel (115). The locking member (500) includes a gasket (501) and a screw (503). The threaded section (504) of the screw (503) passes through an internal hole (502) of the gasket (501) and then enters the channel (115) of the guiding post (114), and is threadedly connected to the channel (115). When the screw (503) is threadedly locked with the guiding post (114), the shock-absorbing pad (400) is compressed between the gasket (501) and the support base (113).

25. The blower motor according to claim 24, wherein The diameter of the internal hole (502) of the gasket (501) is smaller than the diameter of the head (505) of the screw (503), and the outer diameter of the gasket (501) is larger than the diameter of the through-hole (403) on the shock-absorbing pad (400).

26. The blower motor according to claim 23, wherein The axis of the guiding post (114) is parallel to the axis of the sleeve (103) on the base (101).

27. The blower motor according to claim 24, wherein The flange (300) includes a flange plate (302) and a guard plate (303) arranged around the outer periphery of the flange plate (302). A flange hole (304) is provided in the middle of the flange plate (302). The side plate (108) of the base (101) passes through the flange hole (304), and there is a gap between the hole wall of the flange hole (304) and the side plate (108).

28. The blower motor according to claim 27, wherein A skirt plate (305) is provided around the flange hole (304) on the flange plate (302), and the slot hole (301) is opened on the skirt plate (305). The vibration damping pad (400) includes a vibration damping pad body (401). The through hole (403) penetrates through the vibration damping pad body (401). The outer wall of the vibration damping pad body (401) has an annular groove (402) recessed towards the through hole (403). The annular groove (402) is located at the middle position of the vibration damping pad body (401) in the axial direction. The skirt plate (305) is embedded in the annular groove (402). The vibration damping pad (400) is made of rubber material.

29. The blower motor according to claim 28, wherein The upper end surface of the vibration damping pad body (401) has a plurality of first buffer blocks (405) protruding outwards. The lower end surface of the vibration damping pad body (401) has a plurality of second buffer blocks (406) protruding outwards. The first buffer blocks (405) abut against the gasket (501), and the second buffer blocks (406) abut against the support seat (113).

30. The blower motor according to claim 28, wherein Reinforcing ribs (404) are provided on the pore wall of the through hole (403). The position of the reinforcing ribs (404) corresponds to the position of the annular groove (402).

31. The blower motor according to claim 1, wherein The base (101) is made of aluminum alloy.

32. The blower motor according to claim 1, wherein The stator assembly includes a plurality of winding stators (201) arranged around the outer wall of the sleeve (103). The stator pins (202) are electrically connected to the winding stators (201). A bearing is provided inside the sleeve (103). The rotor (207) assembly includes a rotating shaft (205), a rotor housing (206) fixed on the rotating shaft (205), and a plurality of rotors (207) provided on the inner wall of the rotor housing (206). The rotating shaft (205) enters the bearing, and the rotor (207) surrounds the winding stator (201).

33. The blower motor according to claim 32, wherein A first installation groove (104) and a second installation groove (105) are arranged at intervals along the axial direction inside the sleeve (103). A first bearing (203) is provided in the first installation groove (104), and a second bearing (204) is provided in the second installation groove (105). The rotating shaft (205) enters the first bearing (203) and the second bearing (204) and is rotationally matched with the first bearing (203) and the second bearing (204).

34. The blower motor according to claim 32, wherein The blower motor further includes an impeller (600). The impeller (600) includes an impeller bracket (601) and blades (602) arranged around the impeller bracket (601). One end of the rotating shaft (205) extending out of the rotor housing (206) is fixedly connected to the impeller bracket (601).

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