Blower motor

Abstract

The air blower motor comprises 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 piece and a circuit board, the base comprises a shell with an opening in the top, the end cover covers the top of the shell, a mounting cavity is formed between the end cover and the shell, and the circuit board is arranged in the mounting cavity; the wire harness module comprises a wire harness port arranged on the shell and a wire harness arranged at the wire harness port and electrically connected with the circuit board; the first sealing element comprises an end cover sealing ring and a wire harness sealing element, the end cover sealing ring is provided with two opposite end parts in the circumferential direction, the end cover sealing ring is arranged on the shell in a sleeving manner and is limited in the circumferential direction and the radial direction, the motor module comprises a stator assembly and a rotor assembly, and the stator assembly is electrically connected with the circuit board and drives the rotor assembly to rotate. The sealing waterproof problem of the lead can be solved, and the sealing performance between the installation cavity where the circuit board is located and the outside is guaranteed.

Description

Technical Field

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

[0002] As one of the applications of brushless motors, blowers are widely used in the exhaust function of automobiles. In the models of commercial vehicles, due to the large size of the vehicle and the relatively long length of the air duct, the air resistance is relatively large. Initially, only one blower was provided in the front row. The problem encountered was that it was difficult to deliver a large amount of air volume to the middle and rear rows. After improvement, an assistive blower, also known as a mid-rear blower, was installed in the air duct near the middle row. The use of the mid-rear blower can relay the air delivered by the front-row blower to the last row and at the same time provide a suitable air volume for the middle passengers.

[0003] Among them, the waterproofing of the circuit board of the blower is one of the important problems to be solved. The main purpose is to ensure the absolute sealing of the cavity where the circuit board is installed relative to the outside, so as to ensure that the circuit board will not fail due to water or short circuit during long-term use. However, due to reasons such as the need to lead the wires of the circuit board to the outside, the waterproofing problem has always been difficult to solve. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a low-noise brushless motor, which can solve the problem of sealing and waterproofing at the wire leading-out position and ensure the sealing of the installation cavity where the circuit board is located from the outside.

[0005] The present disclosure provides a blower motor, including:

[0006] A circuit board module, including a base, an end cover, a first seal and a circuit board. The base includes a housing with an open top. The end cover covers the top of the housing. An installation cavity is formed between the end cover and the housing. The circuit board is arranged in the installation cavity;

[0007] A wire harness module, including a wire harness port arranged on the housing and a wire harness arranged at the wire harness port and electrically connected to the circuit board;

[0008] The first seal includes an end cover seal ring and a wire harness seal. The end cover seal ring has two opposite ends in the circumferential direction. The end cover seal ring is sleeved on the housing and is circumferentially and radially limited. Two side walls of the wire harness seal in the circumferential direction are recessed with grooves. The wire harness seal is sleeved on the wire harness port and is radially limited. The two opposite ends of the end cover seal ring in the circumferential direction are embedded in the grooves of the wire harness seal, and the end cover seal ring abuts against the side wall of the wire harness seal in the circumferential direction and at least one side wall of the end cover seal ring abuts against the side wall of the wire harness seal in the radial direction;

[0009] 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.

[0010] Optionally, the base further includes a sleeve formed at the bottom of the housing.

[0011] 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 penetrates the bottom plate. The wire harness port is provided on the side plate.

[0012] The stator assembly is fixed to the outer wall of the sleeve, and the rotor assembly is rotatably connected to the sleeve.

[0013] The stator assembly includes stator pins and a second seal. The stator pins pass through the housing and are electrically connected to the circuit board. The second seal is provided between the stator pins and the housing to block the gap between the stator pins and the housing.

[0014] Optionally, the side plate includes a first flange and a second flange connected to the first flange. The second flange is lower than the first flange to form the wire harness port on the side plate.

[0015] The end cap presses the end cap seal ring and the wire harness seal in the axial direction, and snaps and abuts against the outer side walls of the end cap seal ring and the wire harness seal in the radial direction to axially and radially limit the end cap seal ring and the wire harness seal respectively.

[0016] The end cap seal ring has a notch matching the wire harness port. The end cap seal ring is sleeved on the first flange, and the notch coincides with the wire harness port. The wire harness seal is sleeved on the second flange and is circumferentially and radially connected to the end cap seal ring at the notch.

[0017] The end cap is axially pressed against the upper end faces of the end cap seal ring and the wire harness seal. The outer edge of the end cap abuts against at least part of the inner and outer side walls of the end cap seal ring and the wire harness seal in the radial direction.

[0018] Optionally, the lower end face of the end cap seal ring has a groove, and the first flange is embedded in the groove.

[0019] Optionally, the fit between the groove of the end cap seal ring and the first flange of the housing is a transition fit or an interference fit, and the wall of the first flange abuts against the wall of the groove.

[0020] Optionally, a wire harness hole is provided on the wire harness seal. The wire harness hole penetrates through the inner side wall and the outer side wall of the wire harness seal in the radial direction. After the external wire harness passes through the wire harness hole, it is electrically connected to the circuit board, and the hole wall of the wire harness hole abuts against the wire harness.

[0021] Optionally, a first groove is provided on the lower end surface of the wire harness seal. Second grooves are provided on two opposite side walls of the wire harness seal. The two second grooves are located at both ends of the first groove and communicate with the first groove. The second flange is embedded in the first groove, and the ends of the end cap seal ring on both sides of the notch are embedded in the second grooves and abut against the side walls of the second grooves.

[0022] Optionally, a guiding portion is provided at the notch of the first groove.

[0023] Optionally, the guiding portion is a chamfer provided between the groove wall of the first groove and the lower end surface of the wire harness seal.

[0024] Optionally, the fit between the first groove of the wire harness seal and the first flange is a transition fit or an interference fit;

[0025] The fit between the second groove of the wire harness seal and the ends of the end cap seal ring is a transition fit or an interference fit.

[0026] Optionally, a first rib protruding towards the housing is provided on the end cap at a position corresponding to the end cap seal ring. When the end cap presses the end cap seal ring, the first rib presses the upper end surface of the end cap seal ring.

[0027] Optionally, a limiting groove is further provided on the end cap at a position corresponding to the wire harness seal. The upper end of the wire harness seal is embedded in the limiting groove.

[0028] Optionally, a second rib protruding towards the housing is provided at the bottom of the limiting groove. When the end cap presses the wire harness seal, the second rib presses the upper end surface of the wire harness seal.

[0029] Optionally, a limiting block extending towards the housing is further provided on the end cap at a position corresponding to the wire harness seal. When the end cap is pressed on the wire harness seal, the limiting block abuts against the outer side wall of the wire harness seal to prevent the wire harness seal from turning outwards radially under the traction of the wire harness. The limiting block is arranged in a staggered manner with the wire harness hole on the wire harness seal.

[0030] Optionally, both the end cap seal ring and the wire harness seal are made of rubber.

[0031] Optionally, through holes corresponding to the stator pins one by one are provided on the bottom plate, the stator pins pass through the through holes and are electrically connected to a circuit board fixed on the bottom plate, and a second seal is provided in the through holes to block the gap between the wall of the through holes and the stator pins, and both ends of the second seal respectively extend beyond the end face of the bottom plate.

[0032] Optionally, the second seal includes a main rod, and the main rod is provided with a pin hole matching the shape of the stator pin, and the stator pin penetrates into the pin hole and is in interference fit with the wall of the pin hole;

[0033] A plurality of first ribs are provided on the outer wall of the main rod at intervals along the axial direction, the first ribs extend along the circumferential direction of the main rod, and the first ribs are in interference fit with the wall of the through hole;

[0034] The second seal is made of rubber.

[0035] Optionally, the first ribs surround the main rod for one week, and / or,

[0036] The first ribs do not surround the main rod for one week, but the projections of the plurality of first ribs in the axial direction of the main rod form an annular shape.

[0037] 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 penetrates through the top cap, and the radial dimension of the top cap is larger than the radial dimension of the first ribs.

[0038] Optionally, a second rib is provided on the side of the top cap facing the circuit board, the second rib surrounds the pin hole, and when the circuit board is locked on the bottom plate, the circuit board presses the second rib, and a sealed space is formed between the circuit board and the second rib.

[0039] Optionally, a plurality of connecting parts are provided on the outer periphery of the base,

[0040] The blower motor further includes a flange and a connecting component provided corresponding to the connecting parts one by one and located inside the flange, the flange is sleeved outside the base, and the connecting parts are connected to the flange through the connecting components.

[0041] Optionally, the plurality of connecting parts are evenly distributed at intervals around the outer periphery of the base; or, the plurality of connecting parts are symmetrically arranged with respect to the diameter of the base.

[0042] Optionally, the connecting part includes a support seat extending radially along the base and a guide post provided on the support seat and extending axially, and the inner side of the flange has slot holes provided corresponding to the guide posts one by one;

[0043] Each of the connecting components includes a damping pad and a locking member. The damping pad is embedded in the slot hole. The guide post passes through the through hole in the middle of the damping pad and is connected to the locking member. The damping pad is compressed between the support seat and the locking member.

[0044] Optionally, the guide post has a hollow channel, and internal threads are provided on the inner wall of the channel; the locking member includes a gasket and a screw. The threaded section of the screw passes through the inner hole of the gasket and then enters the channel of the guide post and is threadedly connected to the channel;

[0045] When the screw is threadedly locked with the guide post, the damping pad is compressed between the gasket and the support seat.

[0046] 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 damping pad.

[0047] Optionally, the axis of the guide post is parallel to the axis of the sleeve on the base.

[0048] Optionally, the flange includes a flange plate and a guard 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.

[0049] Optionally, a skirt plate is provided around the flange hole on the flange plate, and the slot hole is opened on the skirt plate;

[0050] The damping pad includes a damping pad body. The through hole penetrates the damping pad body. The outer wall of the damping pad body has an annular groove recessed towards the through hole. The annular groove is located at the middle position of the axial direction of the damping pad body, and the skirt plate is embedded in the annular groove;

[0051] The damping pad is made of rubber material.

[0052] Optionally, the upper end surface of the damping pad body has a plurality of first buffer blocks protruding outwards, and the lower end surface of the damping pad body has a plurality of second buffer blocks protruding outwards. The first buffer blocks abut against the gasket, and the second buffer blocks abut against the support seat.

[0053] Optionally, reinforcing ribs are provided on the hole wall of the through hole, and the positions of the reinforcing ribs correspond to the positions of the annular grooves.

[0054] Optionally, the base is made of aluminum alloy.

[0055] Optionally, the stator assembly includes a plurality of winding stators disposed around the outer wall of the sleeve. The stator pins are electrically connected to the winding stators, and a bearing is provided inside 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 rotors surround the winding stators.

[0056] Optionally, a first mounting groove and a second mounting groove are axially spaced inside the sleeve. 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 is rotationally engaged with the first bearing and the second bearing.

[0057] Optionally, the blower motor further includes an impeller. The impeller includes an impeller bracket and blades disposed around the impeller bracket. One end of the rotating shaft extending out of the rotor housing is fixedly connected to the impeller bracket.

[0058] Implementing the above solution has the following beneficial effects:

[0059] In the present disclosure, a first seal is provided between the base and the end cover to block the gap between the mating surfaces of the end cover and the base, and a second seal is provided between the stator pins and the base to block the gap between the stator pins and the base, thereby constructing a sealed installation cavity between the base and the end cover to prevent the circuit board disposed in the installation cavity from being affected by moisture or water ingress. The external wire harness passes through the first seal and is connected to the circuit board. The first seal is made of flexible rubber material and can tightly wrap the wire harness, solving the problem of sealing and waterproofing at the lead wire. Description of the Drawings

[0060] Figure 1 is a schematic structural diagram of the blower motor provided by an embodiment of the present invention.

[0061] Figure 2 is a schematic structural diagram of the blower motor provided by an embodiment of the present invention.

[0062] Figure 3 is a sectional view of the blower motor provided by an embodiment of the present invention.

[0063] Figure 4 is a schematic structural diagram of the circuit board module in the blower motor provided by an embodiment of the present invention.

[0064] Figure 5 is an exploded view of the circuit board module in the blower motor provided by an embodiment of the present invention.

[0065] Figure 6 is a sectional view of the circuit board module in the blower motor provided by an embodiment of the present invention.

[0066] Figure 7It is a schematic structural diagram of an end cover in a circuit board module provided by an embodiment of the present invention.

[0067] Figure 8 It is a schematic structural diagram of a base in a circuit board module provided by an embodiment of the present invention.

[0068] Figure 9 It is a schematic structural diagram of an end cover seal ring in a circuit board module provided by an embodiment of the present invention.

[0069] Figure 10 It is a schematic structural diagram of a wire harness seal in a circuit board module provided by an embodiment of the present invention.

[0070] Figure 11 It is a schematic partial structural diagram of a circuit board module provided by an embodiment of the present invention.

[0071] Figure 12 It is a schematic internal structural diagram of a circuit board module provided by an embodiment of the present invention.

[0072] Figure 13 It is a schematic structural diagram of a second seal in a circuit board module provided by an embodiment of the present invention.

[0073] Figure 14 It is a cross-sectional view of a second seal in a circuit board module provided by an embodiment of the present invention.

[0074] Figure 15 It is an exploded view of a partial structure of a blower motor provided by an embodiment of the present invention.

[0075] Figure 16 It is a cross-sectional view of the connection between a flange and a base provided by an embodiment of the present invention.

[0076] Figure 17 It is a schematic structural diagram of a damping pad assembled on a flange provided by an embodiment of the present invention.

[0077] Figure 18 It is a schematic structural diagram of a flange provided by an embodiment of the present invention.

[0078] Figure 19 It is a schematic structural diagram of a damping pad provided by an embodiment of the present invention.

[0079] Figure 20 It is a top view of a damping pad provided by an embodiment of the present invention.

[0080] In the figure:

[0081] 100 Circuit board module,

[0082] 101 Base, 102 Housing, 103 Sleeve, 104 First mounting groove, 105 Second mounting groove, 106 Base plate, 107 Through hole, 108 Side plate, 109 Wiring harness port, 110 First flange, 111 Second flange, 112 Connecting part, 113 Support seat, 114 Guide post, 115 Channel, 116 End cover, 117 First rib, 118 Limiting groove, 119 Second rib, 120 Limiting block, 121 Installation cavity, 122 Circuit board, 124 End cover sealing ring, 125 Notch, 126 Groove, 127 Wiring harness seal, 128 Wiring harness hole, 129 First groove body, 130 Second groove body, 131 Guide part, 132 Wiring harness, 133 Second seal, 134 Main rod, 135 Pin hole, 136 First convex rib, 137 Top cap, 138 Second convex rib

[0083] 200 Motor module

[0084] 201 Winding stator, 202 Stator pin, 203 First bearing, 204 Second bearing, 205 Rotating shaft, 206 Rotor housing, 207 Rotor

[0085] 300 Flange, 301 Slot hole, 302 Flange plate, 303 Guard plate, 304 Flange hole, 305 Skirt plate

[0086] 400 Vibration damping pad, 401 Vibration damping pad body, 402 Ring groove, 403 Through hole, 404 Reinforcing rib, 405 First buffer block, 406 Second buffer block

[0087] 500 Locking part, 501 Gasket, 502 Internal hole, 503 Screw, 504 Thread section, 505 Head

[0088] 600 Impeller, 601 Impeller bracket, 602 Blade Detailed implementation manners

[0089] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0090] 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 claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0091] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0092] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the product of the present invention is customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0093] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "arranged" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0095] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the figures, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are only used to explain the present invention and should not be construed as a limitation on the present invention.

[0096] This embodiment provides a blower motor, which is applied to an automobile and installed at the position of the armrest box for assisting the front blower to convey air flow to the rear seat. The blower motor at least includes a motor module 200, a circuit board module 100, a wire harness module, and an impeller 600. The wire 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 to the motor module 200. The impeller 600 is fixed on the motor module 200 and can rotate driven by the motor module 200.

[0097] Please refer to Figures 1-6 , the circuit board module 100 includes a base 101, an end cover 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 cover 116 covers the top of the housing 102. An installation cavity 121 is formed between the end cover 116 and the housing 102. The circuit board 122 is disposed in the installation cavity 121. The motor module 200 includes a stator assembly fixed on the outer wall of the sleeve 103 and a rotor 207 assembly rotatably connected to the sleeve 103. The wire harness assembly includes a wire harness port 109 provided on the housing 102 and a wire harness 132 disposed at the wire harness port 109 and electrically connected to the circuit board 122. The first sealing member includes an end cover sealing ring 124 and a wire harness sealing member 127. The end cover sealing ring 124 has two relatively arranged ends 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. Grooves are recessed on both side walls in the circumferential direction of the wire harness sealing member 127. The wire harness sealing member 127 is sleeved on the wire harness port 109 and is limited radially. The two relatively arranged ends in the circumferential direction of the end cover sealing ring 124 are embedded in the grooves of the wire harness sealing member 127. And the end cover sealing ring 124 abuts against the side wall of the wire harness sealing member 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 wire harness sealing member 127 in the radial direction. It is also worth noting that the end cover 116 presses the end cover sealing ring 124 and the wire harness sealing member 127 axially, and buckles and abuts against the outer side walls of the end cover sealing ring 124 and the wire harness sealing member 127 radially to axially and radially limit the end cover sealing ring 124 and the wire harness sealing member 127 respectively. Through the above setting method, first of all, both the end cover sealing ring 124 and the wire harness sealing member 127 are limited radially by the housing 102. Secondly, the wire harness sealing member 127 can further limit the end cover sealing ring 124 radially. Finally, the end cover 116 axially and radially limits the end cover sealing ring 124 and the wire harness sealing member 127 respectively. The structure design of interlocking rings, especially in the use requirements with a small installation space, enables the motor to always maintain the structural stability in the vibrating working environment and the wire harness and other components to maintain the structural stability when being subjected to external forces, thereby maintaining the sealing of the working environment of the circuit board 122 and solving the problem of sealing and waterproofing at the lead wire.

[0098] The stator assembly includes a plurality of winding stators 201 disposed around the outer wall of the sleeve 103 and stator pins 202 electrically connected to the winding stators 201. The stator pins 202 axially pass through the housing 102 and are electrically connected to the circuit board 122; 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 rotors 207 surround the winding stators 201. The rotating shaft 205 enters the bearing, and the rotating shaft 205 is rotatably connected to the sleeve 103 through the bearing. Current is conducted to the winding stators 201 through the circuit board 122 and the stator pins 202. The magnetic field generated by the winding stators 201 interacts with the magnetic field of the rotors 207, thereby driving the overall rotation of the rotor 207 assembly, and then driving the impeller 600 to rotate by the rotor 207 assembly.

[0099] In a possible implementation manner, please refer to FIG. 6. A first mounting groove 104 and a second mounting groove 105 are axially spaced inside the sleeve 103. A first bearing 203 is provided in the first mounting groove 104, and a second bearing 204 is provided in the second mounting groove 105. The rotating shaft 205 enters the first bearing 203 and the second bearing 204 and is rotatably engaged with the first bearing 203 and the second bearing 204.

[0100] The impeller 600 includes an impeller bracket 601 and blades 602 disposed 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. The number of the blades 602 is set to be multiple. The multiple blades 602 all extend in the axial direction and are evenly spaced axially around the rotating shaft 205. There is a gap between adjacent two blades for blowing air. In the working process of the blower motor in this application, the number of the blower motors selected is two, and the impellers 600 of the two blower motors are disposed opposite to each other, and the air inlet direction is perpendicular to the axial direction, so that when the impellers rotate at a high speed, they can uniformly and powerfully boost the air in the air duct by relay.

[0101] Waterproofing of the circuit board 122 of the blower motor is one of the important problems to be solved. The main idea is to ensure the absolute sealing of the cavity where the circuit board 122 is installed relative to the outside, so as to ensure that the circuit board 122 will not fail due to water or short circuit during long-term use. However, since the circuit board 122 needs to lead wires to the outside, it is difficult to solve the waterproofing problem. In view of this problem, in the embodiment of the present invention, a first seal is provided between the housing 102 and the end cover 116 to block the gap between the end cover 116 and the housing 102, and a 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 102, thereby constructing a relatively closed space between the base 101 and the end cover 116 to prevent external water vapor from entering and damaging the circuit board 122.

[0102] Please refer to Figures 5-8 , the housing 102 includes a bottom plate 106 and a side plate 108. The side plate 108 and the sleeve 103 are respectively provided on opposite sides of the bottom plate 106. The opening of the sleeve 103 penetrates the bottom plate 106, and a wire harness port 109 for the external wire harness 132 to pass through is provided on the side plate 108. The first seal includes an end cover seal ring 124 and a wire harness seal 127. The cross-section of the end cover seal is in an inverted U shape. The end cover seal ring 124 is sleeved on the side plate 108 and can wrap the edge of the side plate 108. The wire harness seal 127 is sleeved at the wire harness port 109 and can also wrap the edge of the wire harness port 109. The end cover 116 presses the end cover seal ring 124 and the wire harness seal 127. A wire harness hole 128 is provided on the wire harness seal 127. The wire harness hole 128 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. The diameter of the wire harness hole 128 can be the same as or slightly smaller than the diameter of the wire harness 132. When the wire harness 132 penetrates into the wire harness hole 128, it can abut against the hole wall of the wire harness hole 128, avoiding gaps at the connection between the two, and preventing external water vapor from entering the installation cavity 121 from the gaps.

[0103] Among them, both the end cover seal ring 124 and the wire harness seal 127 are made of rubber. When subjected to the extrusion force from the housing 102, the end cover 116 or the wire harness 132, they can deform themselves, thereby blocking the gap and playing a sealing role. The base 101 is made of aluminum alloy, which has the characteristics of small mass and good heat dissipation effect. And compared with the rubber material, its hardness is better, and it can ensure that the structure does not deform under the locking force and the pulling force at the wire harness.

[0104] In a possible implementation, please refer to Figure 8, 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 opening 109 on the side plate 108. The end cover sealing ring 124 has a notch 125 matching the wire harness opening 109. The end cover 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 abuts against the end cover sealing ring 124 at the notch 125. The end cover 116 is axially pressed against the upper end faces of the end cover sealing ring 124 and the wire harness seal 127.

[0105] Please refer to Figure 9 , a groove 126 is provided on the lower end face of the end cover sealing ring 124. When the end cover sealing ring 124 is sleeved on the base 101, the first flange 110 is embedded in the groove 126. A transition fit or an interference fit is provided between the groove 126 of the end cover sealing ring 124 and the first flange 110 of the housing 102, so that the wall of the first flange 110 abuts against the wall of the groove 126 to better achieve sealing. In the case of a transition fit, it is more convenient for installation. Moreover, the housing 102 can limit the end cover sealing ring 124 radially and axially respectively, so that the end cover sealing ring 124 can still be closely attached to the surrounding parts when stressed, ensuring good sealing performance during use.

[0106] Please refer to Figure 10, a first groove 129 is provided on the lower end surface 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, forming a U-shaped annular groove 402 on the outer periphery of the wire harness seal 127. When the wire harness seal 127 is sleeved on the base 101, the second flange 111 is embedded in the first groove 129. There is an interference fit or a transition fit between the first groove 129 of the wire harness seal 127 and the first flange 110. The ends of the end cap seal ring 124 on both sides of the notch 125 are embedded in the second grooves 130. There is an interference fit or a transition fit between the second grooves 130 of the wire harness seal 127 and the ends of the end cap seal ring 124. The second grooves 130 can wrap the ends of the end cap seal ring 124, realizing mutual limitation in the radial and circumferential directions. The lower end of the wire harness seal 127 is supported by the second flange 111. The two sides of the wire harness seal 127 are connected and matched with the end cap seal ring 124 to form a complete ring body, filling the wire harness opening 109 on the housing 102. The end cap 116 presses the wire harness seal 127 and the end cap seal ring 124 at the same time, making the connection between the end cap 116 and the housing 102 be hermetically connected. During the installation process of the wire harness 132, it usually receives radial tension. By the way of mutual limitation among the housing 102, the end cap seal ring 124 and the wire harness seal 127, and using the fact that the materials of the housing 102 and the end cap 116 have better hardness compared with rubber, the structure at this place always remains stable. Therefore, during the long-term use process, the sealing performance at this place can still be maintained in a good state.

[0107] In a possible implementation manner, a guiding portion 131 is provided at the notch of the first groove 129. The guiding portion 131 enlarges the caliber of the notch. During the process of sleeving the end cap seal ring 124 on the first flange 110, the guiding portion 131 can make the first flange 110 enter the groove more easily, improving the convenience of installation. In actual application, the guiding portion 131 can be a chamfer provided between the groove wall of the first groove 129 and the lower end surface of the wire harness seal 127.

[0108] In a possible implementation manner, please refer to Figure 7 , a first rib 117 protruding towards the housing 102 is provided at the position corresponding to the end cap seal ring 124 on the end cap 116. When the end cap 116 presses the end cap seal ring 124, the first rib 117 presses the upper end surface of the end cap seal ring 124. Specifically, since the end cap seal ring 124 is made of rubber material and has the characteristic of being deformed under extrusion, when the end cap 116 presses the end cap seal ring 124, the first rib 117 will be embedded in the upper surface of the end cap seal ring 124, making the contact surface between the two closely fit without gaps.

[0109] In a possible implementation, a position-limiting groove 118 is further provided on the end cover 116 at a position corresponding to the position of the harness seal 127, and the upper end of the harness seal 127 is embedded in the position-limiting groove 118. This embodiment not only limits the three surfaces (the lower end surface and two opposite side surfaces) of the outer periphery of the harness seal 127, but also further limits the upper end of the harness seal 127 through the position-limiting groove 118 on the end cover 116. During the pulling process of the external harness 132, the harness seal 127 is not easy to turn outward or fall out.

[0110] Furthermore, in order to prevent the wire harness seal 127 from falling out and enhance the stability of the connection of the wire harness seal 127, a stopper 120 is further provided on the end cover 116 at a position corresponding to the position of the wire harness seal 127. The stopper 120 extends toward the housing 102. When the end cover 116 is pressed onto the wire harness seal 127, the stopper 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 under the pulling of the wire harness 132. There may be one or more wire harness holes 128 on the wire harness seal 127. The setting of the wire harness holes 128 may be consistent with the number of wire harnesses 132 to be pulled. At the same time, the stopper 120 and the wire harness holes 128 on the wire harness seal 127 are staggered to avoid interference between the stopper 120 and the wire harness 132 in position. In addition, in order to ensure that the wire harness 132 can smoothly pass through the wire harness hole 128 by fitting against 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 enlarged, which can reduce the resistance of the wire harness 132 passing through the wire harness hole 128.

[0111] Optional, please continue to see Figure 7 The bottom of the limiting groove 118 is also provided with a second rib 119 protruding toward the housing 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 fit tightly without a gap.

[0112] The stator pin 202 needs to pass through the bottom plate 106 and extend into the installation cavity 121 to be electrically connected to the circuit board 122. Therefore, a through hole 107 needs to be opened on the bottom plate 106. After the stator pin 202 is installed, the through hole 107 needs to be sealed. In this embodiment, the second sealing member 133 is used to seal the connection between the pin and the through hole 107. Figure 6, the circuit board 122 is fixed on the bottom plate 106. 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 the circuit board 122. The second seal 133 is arranged at the through holes 107 to block the gap between the wall of the through hole 107 and the stator pins 202. The second seal 133 is made of rubber material. When the stator pins 202 are in the circuit board locking state, electrical connection and fixation with the circuit board are achieved through soldering.

[0113] In a possible implementation manner, the second seal 133 includes a main rod 134. A pin hole 135 matching the shape of the stator pin 202 is formed on the main rod 134. The stator pin 202 penetrates into the pin hole 135 and is in interference fit with the wall of the pin hole 135. The pin hole 135 extends along the long axis of the main rod 134. A plurality of first ribs 136 are arranged at intervals along the axial direction on the outer wall of the main rod 134. The first ribs 136 extend along the circumferential direction of the main rod 134. The first ribs 136 are in interference fit with the wall of the through hole 107. While ensuring waterproof and dustproof sealing, it is also convenient for the second seal 133 to be inserted. It should be noted that in the axial direction of the main rod 134, its upper and lower ends respectively cross the end faces of the bottom plate 106.

[0114] Among them, the first ribs 136 surround the main rod 134 for one week, and / or the first ribs 136 surround the main rod 134 for less than one week, but the projections of the plurality of 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 a single first rib 136 or the circular ring formed by a plurality of first ribs 136 is greater than the diameter of the through hole 107. After the second seal 133 is installed in the through hole 107, the first ribs 136 tightly abut against the hole wall of the through hole 107, blocking the gap between the through hole 107 and the main rod 134 to achieve sealing. In Figure 13 In the structure shown, the main rod 134 is a columnar structure as a whole. Two first ribs 136 are arranged at intervals on the outer wall of the main rod 134. Each first rib 136 surrounds the outer wall of the main rod 134 for one week. 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. The diameter of the first rib 136 is greater than the diameter of the through hole 107.

[0115] Optionally, 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. The radial dimension of the top cap 137 is greater than that of the first rib 136. After the second seal 133 is inserted into the through hole 107, the top cap 137 remains in the installation cavity 121. The lower end face of the top cap 137 abuts against the bottom plate 106, and the upper end face of the top cap 137 abuts against the circuit board 122. During the process of locking the circuit board 122 onto the bottom plate 106, the circuit board 122 presses the top cap 137, causing the top cap 137 to deform and thus closely fit the bottom plate 106 and the circuit board 122, realizing the sealed connection between the two.

[0116] Further, please refer to Figure 6 , Figure 13 and Figure 14 , on the side of the top cap 137 facing the circuit board 122, a second rib 138 is further provided. The second rib 138 surrounds the pin hole 135. Since the second seal 133 is made of rubber material and has a deformation characteristic, when the circuit board 122 is locked onto the bottom plate 106, the circuit board 122 will flatten the second rib 138, making the second rib 138 closely fit the circuit board 122, thereby forming a sealed space between the circuit board 122 and the second rib 138 to achieve the seal at the stator pin 202 and prevent water and gas from invading.

[0117] The mounting flange 300 serves as a fixed connecting member between the blower and the air-conditioning box body. The axial vibration of the motor of the blower is easily transmitted to the mounting flange 300 and then conducted to the air-conditioning box body, resulting in the disadvantage of large noise. And due to the space structure limitation, the inboard rear blower has size limitations and is smaller in size than the front blower, increasing the difficulty of vibration reduction. At present, it is urgently necessary to solve the vibration reduction problem between the motor of the inboard rear blower and the mounting flange 300 on the basis of meeting the small-size structure requirements of the inboard rear blower. For this reason, the present embodiment provides the following technical solution to achieve the vibration reduction purpose by providing a vibration damping pad 400 between the flange 300 and the base 101 of the motor.

[0118] Please refer to Figure 15 and Figure 16, a plurality of connecting portions 112 are provided on the outer periphery of the base 101. The blower motor includes a flange 300 and a connecting assembly provided corresponding to each of the connecting portions 112. The flange 300 is sleeved around the base 101, and the connecting portion 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 relatively buckled flanges 300 to form a cooling air duct. Therefore, the vibration damping position can only be set on the outer periphery of the flange 300. However, the blower motor in the present application serves as an auxiliary boosting function and generates less heat. Therefore, one flange 300 is omitted, and only one flange 300 is used. Through the change of the structure, the vibration damping position is transferred from the outer periphery of the flange 300 to the inner side. Second, the above setting method of the present application makes the overall structure of the blower motor miniaturized.

[0119] Among them, the plurality of connecting portions 112 are evenly distributed at intervals around the outer periphery of the base 101. Of course, in other embodiments, the connecting portions 112 may not be arranged in the foregoing manner, but the plurality of connecting portions 112 may be symmetrically arranged with respect to the diameter of the base 101 to maintain overall stability and ensure vibration damping uniformity.

[0120] In a possible implementation manner, the connecting portion 112 includes a support seat 113 extending radially along the base 101 and a guide post 114 extending axially provided 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 a slot hole 301 provided corresponding to each of the guide posts 114. Each connecting assembly includes a vibration damping pad 400 and a locking member 500. The vibration damping pad 400 is embedded in the slot hole 301. After the guide post 114 passes through the through hole 403 in the middle of the vibration damping pad 400, it is connected to the locking member 500. The vibration damping pad 400 is compressed between the support seat 113 and the locking member 500. Among them, the vibration damping pad 400 is made of rubber material and can be compressed to generate deformation. In the structure shown in Figure 8 , three connecting portions 112 are provided on the outer periphery of the base 101, and the three guide posts 114 are evenly arranged circumferentially around the base 101.

[0121] Please refer to Figure Figure 12 and Figure 16, the guide post 114 has a hollow channel 115, and internal threads are 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 the internal hole 502 of the gasket 501 and then enters the channel 115 of the guide post 114 and is threadedly connected to the channel 115. When the screw 503 is threadedly locked with the guide post 114, the vibration damping pad 400 is compressed between the gasket 501 and the support seat 113. It should be noted that the screwing amount of the screw 503 can be adjusted: 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 fixed unreliably, prone to shaking, and interfere with the air conditioner housing. The optimal vibration damping effect can be adjusted by adjusting the screwing amount of the screw 503.

[0122] Specifically, 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 vibration damping pad 400.

[0123] Please refer to Figure 17 and Figure 18 , 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. The shape of the flange hole 304 is adapted to the outer peripheral shape of the side plate 108, and there is a gap between the hole wall of the flange hole 304 and the side plate 108. 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 skirt plate 305 is between the upper end face and the lower end face of the guard plate 303. Optionally, the skirt plate 305 is located in the middle area in the axial direction of the guard plate 303.

[0124] In a possible implementation manner, the vibration damping pad 400 includes a vibration damping pad body 401. The through hole 403 penetrates the vibration damping pad body 401. The outer wall of the vibration damping pad body 401 has an annular groove 402 recessed toward the through hole 403. The annular groove 402 is located at the middle position in the axial direction of the vibration damping pad body 401, and the skirt plate 305 is embedded in the annular groove 402. The side wall of the annular groove 402 abuts against the skirt edge of the flange 300 to limit the vibration damping pad 400 axially.

[0125] Optionally, the upper end face of the vibration damping pad body 401 has a plurality of first buffer blocks 405 protruding outward, and the lower end face of the vibration damping pad body 401 has a plurality of second buffer blocks 406 protruding outward. The first buffer blocks 405 abut against the gasket 501, and the second buffer blocks 406 abut against the support seat 113. In Figure 19In the shown structure, a plurality of first buffer blocks 405 are provided on the upper end surface of the vibration damping pad body 401, and the plurality of first buffer blocks 405 are evenly distributed around the through hole 403 on the vibration damping pad body 401; a plurality of second buffer blocks 406 are provided on the lower end surface of the vibration damping pad body 401, and the plurality of second buffer blocks 406 are evenly distributed around the through hole 403 on the vibration damping pad body 401.

[0126] Furthermore, as Figure 20 shown, reinforcing ribs 404 are provided on the hole wall of the through hole 403, and the position of the reinforcing ribs 404 corresponds to the position of the annular groove 402, which plays a role in strengthening the structure of the vibration damping pad 400.

[0127] The installation method of this embodiment is as follows: 1. First, embed the vibration damping pad 400 in the slot hole 301 of the flange 300; 2. Integrally sleeved the flange 300 around the periphery of the base 101, and the guide post 114 on the base 101 penetrates through the through hole 403 on the vibration damping pad 400, and the lower end surface of the vibration damping pad 400 abuts against the support seat 113; 3. Place the gasket 501 on the upper end surface of the vibration damping pad 400, and the screw 503 passes through the gasket 501 and is screwed into the guide post 114 to compress the vibration damping pad 400 by pressing the gasket 501 until the vibration damping pad 400 is compressed to a preset amount, so that the vibration damping pad 400 is pressed tightly between the gasket 501 and the support seat 113.

[0128] This embodiment realizes the vibration damping purpose by using the above-mentioned vibration damping pad 400. The overall vibration damping structure has fewer parts and high integration, and can meet the small volume requirements. After the first buffer block 405 and the second buffer block 406 of the vibration damping pad 400 are compressed, they still protrude axially from the end surface of the guide post 114, and can provide appropriate elastic force, so as to effectively reduce the vibration of the motor and then transmit it to the flange 300.

[0129] It should be noted that: due to the particularity of the installation position of the inboard rear blower in this application, it has a small size and low heat generation. Therefore, compared with the existing front blower, the inboard rear blower in this application omits the air duct for cooling the motor by itself.

[0130] Note that the above is only the preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope 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 only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and 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. Two side walls of the wire harness seal (127) in the circumferential direction are 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 cover (116) presses the end cover sealing ring (124) and the wire harness seal (127) axially, and clamps and abuts against the outer side walls of the end cover sealing ring (124) and the wire harness seal (127) radially, so as to axially and radially limit the end cover sealing ring (124) and the wire harness seal (127) respectively; The end cover sealing ring (124) has a notch (125) matching the wire harness port (109). The end cover sealing ring (124) is sleeved on the first flange (110), the notch (125) coincides with the wire harness port (109), and the wire harness seal (127) is sleeved on the second flange (111) and is circumferentially and radially connected to the end cover sealing ring (124) at the notch (125); The end cover (116) is axially pressed on the upper end surfaces of the end cover sealing ring (124) and the wire harness seal (127), and the outer edge of the end cover (116) abuts against at least part of the inner and outer side walls of the end cover sealing ring (124) and the wire harness seal (127) radially.

4. The blower motor according to claim 3, wherein The lower end surface of the end cover 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 There is an interference fit or a transition fit between the groove (126) of the end cover 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 The wire harness seal (127) is provided with a wire harness hole (128). The wire harness hole (128) radially penetrates through 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 The lower end surface of the wire harness seal (127) is provided with a first groove (129). The two opposite side walls of the wire harness seal (127) are provided with second grooves (130). 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 cover 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 There is an interference fit or a transition fit between the first groove body (129) of the wire harness seal (127) and the first flange (110); There is an interference fit or a transition fit between the second groove body (130) of the wire harness seal (127) and the end of the end cover seal ring (124). Preferably, 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). Preferably, 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). Preferably, 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). Preferably, 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 pulling of the wire harness (132), and the limiting block (120) is arranged in a dislocation manner with the wire harness hole (128) on the wire harness seal (127). Preferably, both the end cover seal ring (124) and the wire harness seal (127) are made of rubber. Preferably, 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 in the through holes (107) to seal the gap between the wall of the through holes (107) and the stator pins (202), and both ends of the second seal (133) respectively extend beyond the end surface of the bottom plate (106). Preferably, the second seal (133) includes a main rod (134). The main rod (134) has a pin hole (135) matching the shape of the stator pin (202). The stator pin (202) penetrates into the pin hole (135) and has an 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 circumferentially along 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. Preferably, 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. Preferably, 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 greater than the radial dimension of the first rib (136). Preferably, 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), and 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). Preferably, 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 each of the connecting parts (112) and located inside the flange (300). The flange (300) is sleeved around the base (101), and the connecting part (112) is connected to the flange (300) through the connecting component. Preferably, the plurality of connecting parts (112) are evenly spaced 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). Preferably, the connecting part (112) includes a support seat (113) extending radially along the base (101) and a guide post (114) provided on the support seat (113) and extending axially. The inner side of the flange (300) has a slot hole (301) provided corresponding to each of the guide 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), the guide post (114) passes through a through hole (403) in the middle of the shock-absorbing pad (400) and then is connected to the locking member (500), and the shock-absorbing pad (400) is compressed between the support seat (113) and the locking member (500). Preferably, the guide 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), and the threaded section (504) of the screw (503) passes through the internal hole (502) of the gasket (501) and then enters the channel (115) of the guide post (114) and is threadedly connected to the channel (115); When the screw (503) is threadedly locked with the guide post (114), the damping pad (400) is compressed between the gasket (501) and the support base (113). Preferably, 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 damping pad (400). Preferably, the axis of the guide post (114) is parallel to the axis of the sleeve (103) on the base (101). Preferably, 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). Preferably, 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 damping pad (400) includes a damping pad body (401). The through hole (403) penetrates the damping pad body (401). The outer wall of the 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 axial direction of the damping pad body (401), and the skirt plate (305) is embedded in the annular groove (402); The damping pad (400) is made of rubber material. Preferably, the upper end surface of the damping pad body (401) has a plurality of first buffer blocks (405) protruding outwards, and the lower end surface of the 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 base (113). Preferably, reinforcing ribs (404) are provided on the hole wall of the through hole (403), and the position of the reinforcing ribs (404) corresponds to the position of the annular groove (402). Preferably, the base (101) is made of aluminum alloy. Preferably, the stator assembly includes a plurality of winding stators (201) disposed around the outer wall of the sleeve (103), the stator pins (202) are electrically connected to the winding stators (201), and 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) disposed 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). Preferably, a first installation groove (104) and a second installation groove (105) are axially spaced inside the sleeve (103), a first bearing (203) is provided in the first installation groove (104), 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 engaged with the first bearing (203) and the second bearing (204). Preferably, the blower motor further includes an impeller (600), the impeller (600) includes an impeller bracket (601) and blades (602) disposed around the impeller bracket (601), and 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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