Blower motor

Abstract

The utility model discloses a blower motor, which 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 element and a circuit board, the base comprises a shell with an open 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 piece comprises an end cover sealing ring and a wire harness sealing piece, the end cover sealing ring is arranged on the shell in a sleeving mode and limited in the circumferential direction and the radial direction, and the wire harness sealing piece is arranged on the wire harness opening in a sleeving mode and limited in 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 utility model relates to the technical field of motors, in particular to a blower motor. Background Art

[0002] As one of the applications of brushless motors, blowers are widely used in automobile exhaust functions. In commercial vehicles, due to the large size of the vehicle and the long length of the air duct, the wind resistance is relatively large. Initially, only one blower was installed in the front row, and the difficulty encountered was that it was difficult to deliver a large amount of air to the middle and rear rows. After improvement, a power-assisted blower, also called a center rear blower, is installed in the air duct near the middle row. The use of the center rear blower can relay the air delivered by the front blower to the last row, while providing a suitable amount of air for the middle occupant.

[0003] Among them, waterproofing of the blower circuit board 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 or short-circuit during long-term use. However, due to the need to lead the circuit board to the outside, the waterproofing problem has always been difficult to solve. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a low-noise brushless motor that can solve the problem of sealing and waterproofing at the lead wires and ensure the sealing between the installation cavity where the circuit board is located and the outside world.

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

[0006] A circuit board module, comprising a base, an end cover, a first sealing member and a circuit board, wherein the base comprises a shell with an open top, the end cover is covered on the top of the shell, an installation cavity is formed between the end cover and the shell, and the circuit board is arranged in the installation cavity;

[0007] A wiring harness module, comprising a wiring harness port disposed on the housing, and a wiring harness disposed at the wiring harness port and electrically connected to the circuit board;

[0008] The first sealing member comprises an end cover sealing ring and a wiring harness sealing member, wherein the end cover sealing ring is sleeved on the housing and is circumferentially and radially limited, and the wiring harness sealing member is sleeved on the wiring harness port and is radially limited;

[0009] The motor module comprises 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 comprises a sleeve formed at the bottom of the shell;

[0011] The housing comprises a bottom plate and a side plate arranged on one side of the bottom plate, the sleeve is arranged 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;

[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 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 arranged between the stator pin and the housing to seal the gap between the stator pin and the housing.

[0014] Optionally, the end cover sealing ring has two opposite ends in the circumferential direction, and the two side walls in the circumferential direction of the wiring harness seal are both recessed with a groove body, the two opposite ends in the circumferential direction of the end cover sealing ring are embedded in the groove body of the wiring harness seal, and the end cover sealing ring abuts against the side wall of the wiring harness seal in the circumferential direction, and at least one side wall of the end cover sealing ring abuts against the side wall of the wiring harness seal in the radial direction.

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

[0016] The end cover presses the end cover sealing ring and the wiring harness seal in the axial direction, 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 end cover sealing ring and the wiring harness seal in the axial direction and radial direction 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 is 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 wire 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 wire 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, a transition fit or an interference fit is formed between the groove of the end cover sealing ring and the first flange of the housing, and a wall of the first flange abuts against a 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 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 ends 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 guiding portion is provided at the notch of the first slot body.

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

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

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

[0027] Optionally, a first rib protruding toward the shell is provided on the end cover at a position corresponding to the position of the end cover sealing ring, and 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 shell 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 further 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 with the stator pins, the stator pins pass through the through holes to be 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 holes 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 comprises a main rod, the main rod has a pin hole matching the shape of the stator pin, the stator pin penetrates into the pin hole and is interference fit with the wall of the pin hole;

[0034] A plurality of first convex ribs are provided on the outer wall of the main rod at intervals in the axial direction, the first convex ribs extend along the circumference of the main rod, and the first convex 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 convex rib surrounds the main rod for less than one circle, but the projections of the plurality of first convex 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 convex 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 comprises 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 spaced 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 one-to-one 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 gasket and a screw, and the threaded section of the screw passes through the inner hole of the gasket and enters the channel of the guide column, and is threadedly connected with the channel;

[0046] When the screw and the guide column are threadedly locked, 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 guard plate arranged around the outer circumference of the flange plate, a flange hole is provided in the middle of the flange plate, a 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 slot hole is opened on the skirt plate;

[0051] The vibration damping pad comprises 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 axial direction of the vibration damping pad body, 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 via 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 arranged 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 axially spaced apart in the sleeve, a first bearing is disposed in the first mounting groove, a second bearing is disposed in the second mounting groove, and the rotating shaft enters the first bearing and the second bearing and rotates in cooperation with the first bearing and the second bearing.

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

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

[0060] The present invention provides a first seal between the base and the end cover to block the gap between the end cover and the base interface, and provides a second seal between the stator pin and the base to block the gap between the stator pin 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 damp or infiltrated with water. The external wiring harness passes through the first seal to access the circuit board. The first seal is made of flexible rubber material and can tightly wrap the wiring harness to solve the sealing and waterproofing problem at the lead wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a structural schematic diagram of a blower motor provided in an embodiment of the utility model.

[0062] Figure 2 It is a structural schematic diagram of a blower motor provided in an embodiment of the utility model.

[0063] Figure 3 It is a cross-sectional view of a blower motor provided in an embodiment of the utility model.

[0064] Figure 4 It is a structural schematic diagram of a circuit board module in a blower motor provided by an embodiment of the utility model.

[0065] Figure 5 It is an exploded view of a circuit board module in a blower motor provided in an embodiment of the utility model.

[0066] Figure 6 It is a cross-sectional view of a circuit board module in a blower motor provided by an embodiment of the utility model.

[0067] Figure 7 It is a schematic diagram of the structure of the end cover in the circuit board module provided by the embodiment of the utility model.

[0068] Figure 8 It is a structural schematic diagram of a base in a circuit board module provided in an embodiment of the utility model.

[0069] Fig. 9 It is a structural schematic diagram of an end cover sealing ring in a circuit board module provided by an embodiment of the utility model.

[0070] Fig.10 It is a schematic diagram of the structure of a wiring harness seal in a circuit board module provided by an embodiment of the utility model.

[0071] Fig.11 It is a partial structural schematic diagram of a circuit board module provided by an embodiment of the utility model.

[0072] Fig.12 It is a schematic diagram of the internal structure of the circuit board module provided by the embodiment of the utility model.

[0073] Fig.13 It is a structural schematic diagram of the second sealing component of the circuit board module provided by an embodiment of the utility model.

[0074] Fig.14 It is a cross-sectional view of the second sealing member of the circuit board module provided in the embodiment of the utility model.

[0075] Fig.15 It is an exploded view of the local structure of the blower motor provided in the embodiment of the utility model.

[0076] Fig.16 It is a cross-sectional view of the connection between the flange and the base provided in an embodiment of the utility model.

[0077] Fig.17 It is a schematic structural diagram of a vibration-damping pad provided in an embodiment of the utility model being assembled on a flange.

[0078] Fig.18 It is a structural schematic diagram of a flange provided in an embodiment of the utility model.

[0079] Fig.19 It is a schematic diagram of the structure of the vibration damping pad provided in an embodiment of the utility model.

[0080] Fig. 20 It is a top view of the vibration damping pad provided in the embodiment of the utility model.

[0081] In the figure:

[0082] 100 circuit board modules,

[0083] 101 base, 102 shell, 103 sleeve, 104 first mounting groove, 105 second mounting groove, 106 bottom plate, 107 through hole, 108 side plate, 109 harness port, 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 body, 130 second slot body, 131 guide portion, 132 harness, 133 second seal, 134 main rod, 135 pin hole, 136 first convex rib, 137 top cap, 138 second convex rib,

[0084] 200 motor modules,

[0085] 201 winding stator, 202 stator pin, 203 first bearing, 204 second bearing, 205 rotating shaft, 206 rotor housing, 207 rotor,

[0086] 300 flange, 301 slot, 302 flange, 303 guard plate, 304 flange hole, 305 skirt plate,

[0087] 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,

[0088] 500 locking piece, 501 gasket, 502 internal hole, 503 screw, 504 threaded section, 505 head,

[0089] 600 impeller, 601 impeller bracket, 602 blade. DETAILED DESCRIPTION

[0090] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0091] 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 present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0092] 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, further definition and explanation thereof is not required in subsequent drawings.

[0093] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model 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 a limitation on the present utility model. 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 utility model, unless otherwise specified, "multiple" means two or more.

[0094] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" 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 ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0095] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0096] The embodiments of the present invention are described in detail below, and 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0097] This embodiment provides a blower motor, which is applied to a car and installed at the armrest box position to assist the front blower in delivering airflow to the rear seat. The blower motor at least includes a motor module 200, a circuit board module 100, a wiring harness module and an impeller 600, wherein the wiring harness module is connected to an external power source and the circuit board module 100, the circuit board module 100 is connected to the motor module 200 to supply power to the motor module 200, and the impeller 600 is fixed on the motor module 200 and can rotate under the drive of the motor module 200.

[0098] See also Figure 1-Figure 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 arranged in the installation 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 opposite ends arranged 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 both recessed with a groove body, the wiring harness seal 127 is sleeved on the wiring harness port 109 and is radially limited, and the two opposite ends of the end cover sealing ring 124 in the circumferential direction 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 cover 116 presses the end cover seal ring 124 and the harness seal 127 axially, buckles and abuts the outer wall of the end cover seal ring 124 and the harness seal 127 radially, so as to limit the axial and radial positions of the end cover seal ring 124 and the harness seal 127. Through the above-mentioned setting method, firstly, the end cover seal ring 124 and the harness seal 127 are both radially limited by the housing 102, and then the harness seal 127 can radially limit the end cover seal ring 124 again, and finally the end cover 116 limits the axial and radial positions of the end cover seal ring 124 and the harness seal 127 respectively. The interlocking structural design, especially in the use requirements of small installation space, enables the motor to always maintain the stability of the structure in a vibrating working environment and when the components such as the harness are subjected to external forces, thereby maintaining the sealing of the working environment of the circuit board 122 and solving the sealing and waterproofing problem at the lead wire.

[0099] The stator assembly includes a plurality of winding stators 201 arranged around the outer wall of the sleeve 103 and stator pins 202 electrically connected to the winding stators 201, and the stator pins 202 axially penetrate the housing 102 and are electrically connected to the circuit board 122; a bearing is arranged 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 arranged on the inner wall of the rotor housing 206, the rotor 207 surrounds the winding stator 201, the rotating shaft 205 enters the bearing, and the rotating shaft 205 is rotatably connected to the sleeve 103 through the bearing. The current is conducted to the winding stator 201 through the circuit board 122 and the stator pins 202, and the magnetic field generated by the winding stator 201 interacts with the magnetic field of the rotor 207, thereby driving the rotor 207 assembly to rotate as a whole, and then the rotor 207 assembly drives the impeller 600 to rotate.

[0100] In a possible implementation, please refer to Figure 6, the sleeve 103 is provided with a first mounting groove 104 and a second mounting groove 105 axially spaced apart, the first mounting groove 104 is provided with a first bearing 203, the second mounting groove 105 is provided with a second bearing 204, 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.

[0101] 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 extend along the axial direction and are evenly spaced around the rotating shaft 205 axially. 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 to each other, and the air inlet direction is perpendicular to the axial direction, so that the impellers can evenly and powerfully relay the wind in the air duct when rotating at high speed.

[0102] Waterproofing the circuit board 122 of the blower motor 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 122 is installed relative to the outside, so as to ensure that the circuit board 122 will not fail or short-circuit when in contact with water during long-term use. However, since the circuit board 122 needs to be wired to the outside, it is difficult to solve the waterproofing problem. In view of this problem, the embodiment of the utility model sets 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 sets 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.

[0103] See also Figure 5-Figure 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 a tube mouth that passes through the bottom plate 106. The side plate 108 is provided with a harness opening 109 for the external harness 132 to pass through. The first seal includes an end cover seal ring 124 and a harness seal 127, wherein the cross section of the end cover seal is an inverted U-shape. The end cover seal ring 124 is sleeved on the side plate 108 and can play a role in wrapping the edge of the side plate 108. The harness seal 127 is sleeved on the harness opening 109 and can also play a role in wrapping the edge of the harness opening 109. The end cover 116 presses the end cover seal ring 124 and the harness seal 127. The harness seal 127 is provided with a harness hole 128, which penetrates the inner wall and the outer wall of the harness seal 127. The 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 can abut against the hole wall of the harness hole 128 to avoid a gap at the connection between the two, thereby preventing external moisture from entering the installation cavity 121 through the gap.

[0104] The end cap seal ring 124 and the harness seal 127 are both made of rubber, and can deform when subjected to the extrusion force from the housing 102, the end cap 116 or the harness 132, 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 has better hardness than rubber material, and can ensure that the structure does not deform under the locking force and the tension at the harness.

[0105] In one possible implementation, see Figure 8The 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 harness port 109 on the side plate 108. The end cover seal ring 124 has a notch 125 matching the harness port 109, the end cover seal ring 124 is sleeved on the first flange 110, the notch 125 coincides with the harness port 109, the harness seal 127 is sleeved on the second flange 111 and connected to the end cover seal ring 124 at the notch 125. The end cover 116 is axially pressed on the upper end surfaces of the end cover seal ring 124 and the harness seal 127.

[0106] See also Fig. 9 The lower end surface of the end cover sealing ring 124 is provided with a groove 126. When the end cover sealing ring 124 is mounted on the base 101, the first flange 110 is embedded in the groove 126. The groove 126 of the end cover sealing ring 124 and the first flange 110 of the housing 102 are transition fit or interference fit, 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 transition fit, it is easier to install. In addition, the housing 102 can limit the radial and axial directions of the end cover sealing ring 124 respectively, so that the end cover sealing ring 124 can still fit closely with the surrounding parts when subjected to force, ensuring good sealing performance during use.

[0107] See also Fig.10The lower end surface of the harness seal 127 is provided with a first groove body 129, and the two opposite side walls of the harness seal 127 are provided with a second groove body 130. The two second groove bodies 130 are located at the two ends of the first groove body 129 and are connected to the first groove body 129, and a U-shaped annular groove 402 is formed on the outer periphery of the harness seal 127. When the harness seal 127 is sleeved on the base 101, the second flange 111 is embedded in the first groove body 129, and the first groove body 129 of the harness seal 127 and the first flange 110 are transition fit or interference fit. The ends of the end cover seal ring 124 on both sides of the notch 125 are embedded in the second groove body 130, and the second groove body 130 of the harness seal 127 and the ends of the end cover seal ring 124 are transition fit or interference fit. The second groove body 130 can wrap the ends of the end cover seal ring 124 to achieve mutual positioning in the radial and circumferential directions. The lower end of the harness seal 127 is supported by the second flange 111, and the two sides of the harness seal 127 are connected and matched with the end cover seal ring 124 to form a complete circle, filling the harness port 109 on the housing 102. The end cover 116 simultaneously presses the harness seal 127 and the end cover seal ring 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. The housing 102, the end cover seal ring 124 and the harness seal 127 are mutually limited, and the material of the housing 102 and the end cover 116 has a better hardness than rubber, so that the structure of this place is always stable, and then during long-term use, the sealing of this place can still be maintained in a good state.

[0108] In a possible implementation, a guide portion 131 is provided at the notch of the first slot body 129, and the guide portion 131 enlarges the diameter of the notch. When the end cover sealing ring 124 is mounted on the first flange 110, the guide portion 131 can make it easier for the first flange 110 to enter the slot body, thereby improving the convenience of installation. In actual use, the guide portion 131 can be a chamfer provided between the slot wall of the first slot body 129 and the lower end surface of the wiring harness seal 127.

[0109] In one possible implementation, see Figure 7 , a first rib 117 protruding toward the housing 102 is provided on the end cover 116 at a position corresponding to the end cover sealing ring 124. When the end cover 116 presses the end cover sealing ring 124, the first rib 117 squeezes the upper end surface of the end cover sealing ring 124. Specifically, since the end cover sealing ring 124 is made of rubber and has the characteristic of being deformed by extrusion, when the end cover 116 presses the end cover sealing ring 124, the first rib 117 will be embedded in the upper surface of the end cover sealing ring 124 so that the contact surfaces of the two are closely fitted without a gap.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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 6The circuit board 122 is fixed on the bottom plate 106. The bottom plate 106 is provided with through holes 107 corresponding to the stator pins 202. The stator pins 202 pass through the through holes 107 to be electrically connected to the circuit board 122. The second sealing member 133 is provided at the through hole 107 to block the gap between the wall of the through hole 107 and the stator pins 202. The second sealing member 133 is made of rubber. When the circuit board is locked, the stator pins 202 are electrically connected and fixed to the circuit board by soldering.

[0114] In a possible implementation, 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 is inserted into the pin hole 135 and has an interference fit with the wall of the pin hole 135, and the pin hole 135 extends along the long axis of the main rod 134. A plurality of first convex ribs 136 are provided on the outer wall of the main rod 134 at intervals along the axial direction, the first convex ribs 136 extend along the circumference of the main rod 134, and the first convex ribs 136 have an interference fit with the wall of the through hole 107, which ensures waterproof and dustproof sealing while 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 respectively pass over the end surface of the bottom plate 106.

[0115] The first rib 136 surrounds the main rod 134 for one circle, and / or the first rib 136 surrounds the main rod 134 for less than one circle, 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, and the diameter of the circular ring formed by a single first rib 136 or a plurality of 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 against the wall of the through hole 107, blocking the gap between the through hole 107 and the main rod 134 to achieve sealing. Fig.13 In the structure shown, 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, and 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.

[0116] 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 passes 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. 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 against the bottom plate 106, and the upper end surface of the top cap 137 abuts against the circuit board 122. When the circuit board 122 is locked on the bottom plate 106, the circuit board 122 squeezes the top cap 137, so that the top cap 137 is deformed and then closely fits the bottom plate 106 and the circuit board 122, so as to achieve a sealed connection between the two.

[0117] For further information, see Figure 6 , Fig.13 and Fig.14 A second convex rib 138 is further provided on the side of the top cap 137 facing the circuit board 122, and the second convex rib 138 surrounds the pin hole 135. Since the second sealing member 133 is made of rubber material and has deformation characteristics, when the circuit board 122 is locked on the bottom plate 106, the circuit board 122 will flatten the second convex rib 138, so that the second convex rib 138 and the circuit board 122 are tightly fitted, thereby forming a closed space between the circuit board 122 and the second convex rib 138, thereby achieving sealing at the stator pin 202 and preventing water vapor from intruding.

[0118] 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, the present embodiment provides the following technical solution, which achieves the purpose of vibration reduction by setting a vibration reduction pad 400 between the flange 300 and the base 101 of the motor.

[0119] See also Fig.15 and Fig.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 the conventional blower motor, the setting method of the present application saves space. First, the conventional blower motor needs to be provided with two relatively buckled flanges 300 to form a cooling air duct, so the vibration reduction position can only be set on the outer periphery 300 of the flange, but the blower motor in the present application acts as an auxiliary booster and generates less heat, so 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.

[0120] 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 the plurality of connection parts 112 may be symmetrically arranged relative to the diameter of the base 101 to maintain overall stability and ensure uniform vibration reduction.

[0121] In a possible implementation, the connecting portion 112 includes a support seat 113 extending radially along the base 101 and a guide column 114 extending axially on the support seat 113, the axis of the guide column 114 is parallel to the axis of the sleeve 103 on the base 101, and the flange 300 has slots 301 arranged in a one-to-one correspondence with the guide columns 114. Each of the connecting components includes a vibration damping pad 400 and a locking member 500, the vibration damping pad 400 is embedded in the slot 301, the guide column 114 passes through the through hole 403 in the middle of the vibration damping pad 400 and is connected to the locking member 500, and 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 example Figure 8 In the structure shown, three connecting parts 112 are provided on the periphery of the base 101 , and three guide columns 114 are evenly arranged around the circumference of the base 101 .

[0122] See Figure Fig.12 and Fig.16, the guide column 114 has a hollow channel 115, and the inner wall of the channel 115 is provided with an internal thread; the locking member 500 includes a gasket 501 and a screw 503, and the threaded section 504 of the screw 503 passes through the inner hole 502 of the gasket 501 and enters the channel 115 of the guide column 114, and is threadedly connected with the channel 115. When the screw 503 is threadedly locked with the guide column 114, the vibration-damping pad 400 is compressed between the gasket 501 and the support seat 113. It is worth noting that the screw-in 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 unreliably fixed, easy to shake, and interfere with the air-conditioning box. The best vibration-damping effect can be achieved by adjusting the screw-in amount of the screw 503.

[0123] 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 .

[0124] See also Fig.17 and Fig.18 The flange 300 includes a flange plate 302 and a guard plate 303 arranged around the periphery of the flange plate 302. A flange hole 304 is arranged 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 shape of the periphery 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 arranged 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 located between the upper end surface and the lower end surface of the guard plate 303. Optionally, the skirt plate 305 is located in the middle area of ​​the guard plate 303 in the axial direction.

[0125] In a 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 recessed toward the through hole 403, the annular groove 402 is located in the middle of the vibration damping pad body 401 in the axial direction, 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, and the vibration damping pad 400 is limited in the axial direction.

[0126] Optionally, the upper end surface of the vibration-damping pad body 401 has a plurality of first buffer blocks 405 protruding outwards, and 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. Fig.19In the structure shown, 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.

[0127] Further, such as Fig. 20 As shown, a reinforcing rib 404 is provided on the hole wall of the through hole 403 , and the position of the reinforcing rib 404 corresponds to the position of the annular groove 402 , so as to strengthen the structure of the vibration damping pad 400 .

[0128] 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. sleeve 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 surface of the vibration damping pad 400 abuts 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 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.

[0129] This embodiment achieves the purpose of vibration reduction by using the above-mentioned vibration reduction pad 400. The overall vibration reduction structure has fewer parts and a high degree of integration, which can meet the small volume requirement. After being compressed, the first buffer block 405 and the second buffer block 406 of the vibration reduction pad 400 still protrude from the end surface of the guide column 114 in the axial direction, which can provide appropriate elastic force, thereby achieving the effect of effectively reducing the vibration of the motor and transmitting it to the flange 300.

[0130] 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 motor cooling compared to the existing front blower.

[0131] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A blower motor, characterized in that: include: A circuit board module (100) comprises a base (101), an end cover (116), a first sealing member and a circuit board (122), wherein the base (101) comprises a housing (102) with an open top, 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), and the circuit board (122) is arranged in the installation cavity (121); A wiring harness module, comprising 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 sealing member comprises an end cover sealing ring (124) and a wiring harness sealing member (127); the end cover sealing ring (124) is sleeved on the housing (102) and is circumferentially and radially limited; the wiring harness sealing member (127) is sleeved on the wiring harness port (109) and is radially limited; The motor module (200) comprises a stator assembly and a rotor assembly, wherein 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, characterized in that: The base (101) further comprises a sleeve (103) formed at the bottom of the shell (102); The housing (102) comprises a bottom plate (106) and a side plate (108) arranged on one side of the bottom plate (106); the sleeve (103) is arranged on the other side of the bottom plate (106) and passes through the bottom plate (106); and the side plate (108) is provided with the wiring harness port (109); The stator assembly is fixed to the outer wall of the sleeve (103), and the rotor assembly is rotatably connected to the sleeve (103); The stator assembly comprises a stator pin (202) and a second seal (133); the stator pin (202) passes through the housing (102) to be electrically connected to the circuit board (122); the second seal (133) is arranged between the stator pin (202) and the housing (102) to seal a gap between the stator pin (202) and the housing.

3. The blower motor according to claim 1, characterized in that: The end cover sealing ring (124) has two opposite ends in the circumferential direction, and the two side walls in the circumferential direction of the wiring harness seal (127) are both recessed with grooves, and the two opposite ends in the circumferential direction of the end cover sealing ring (124) are embedded in the grooves of the wiring harness seal (127), and the end cover sealing ring (124) abuts against the side walls 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.

4. The blower motor according to claim 3, characterized in that: The housing (102) comprises a bottom plate (106) and a side plate (108) arranged on one side of the bottom plate (106); the side plate (108) comprises 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 wiring harness sealing member (127) in the axial direction, and buckles and abuts against the outer side walls of the end cover sealing ring (124) and the wiring harness sealing member (127) in the radial direction, so as to limit the axial and radial positions of the end cover sealing ring (124) and the wiring harness sealing member (127) respectively; 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); 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 onto the upper end surfaces of the end cover sealing ring (124) and the wiring harness sealing member (127), and the outer edge of the end cover (116) is radially abutted against at least part of the inner and outer side walls of the end cover sealing ring (124) and the wiring harness sealing member (127).

5. The blower motor according to claim 4, characterized in that: 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).

6. The blower motor according to claim 5, characterized in that The groove (126) of the end cover sealing ring (124) and the first flange (110) of the housing (102) are in transition fit or interference fit, and the wall of the first flange (110) abuts against the wall of the groove (126).

7. The blower motor according to claim 4, characterized in that: The harness seal (127) is provided with a harness hole (128), and the harness hole (128) radially penetrates the inner wall and the outer wall of the harness seal (127). The external harness (132) is electrically connected to the circuit board (122) after passing through the harness hole (128), and the hole wall of the harness hole (128) abuts against the harness (132).

8. The blower motor according to claim 4, characterized in that 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 second groove bodies (130). The two second groove bodies (130) are located at the two ends of the first groove body (129) and are connected to the first groove body (129). The second flange (111) is embedded in the first groove body (129), and the ends of the end cover sealing ring (124) on both sides of the notch (125) are embedded in the second groove body (130) and abut against the side walls of the second groove body (130).

9. The blower motor according to claim 8, characterized in that A guide portion (131) is provided at the notch of the first notch body (129).

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

11. The blower motor according to claim 8, characterized in that A transition fit or an interference fit is formed between the first groove body (129) of the wiring harness seal (127) and the first flange (110); The second groove body (130) of the wire harness seal (127) and the end of the end cover seal ring (124) are in transition fit or interference fit.

12. The blower motor according to claim 4, characterized in that A first rib (117) protruding toward the housing (102) is provided on the end cover (116) at a position corresponding to the end cover sealing ring (124); when the end cover (116) presses the end cover sealing ring (124), the first rib (117) squeezes the upper end surface of the end cover sealing ring (124).

13. The blower motor according to claim 4, characterized in that A limiting groove (118) is also provided on the end cover (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 limiting groove (118).

14. The blower motor according to claim 13, characterized in that A second rib (119) protruding toward the housing (102) is provided at the bottom of the limiting groove (118); when the end cover (116) presses the wiring harness seal (127), the second rib (119) squeezes the upper end surface of the wiring harness seal (127).

15. The blower motor according to claim 4 or 13, characterized in that A limit block (120) extending toward the housing (102) is also provided on the end cover (116) at a position corresponding to the position of the wire harness seal (127); when the end cover (116) is pressed onto the wire harness seal (127), the limit block (120) abuts against the outer wall of the wire harness seal (127) to prevent the wire harness seal (127) from radially turning outward under the pulling of the wire harness (132); the limit block (120) and the wire harness hole (128) on the wire harness seal (127) are offset.

16. The blower motor according to claim 1, characterized in that The end cover sealing ring (124) and the wiring harness sealing member (127) are both made of rubber.

17. The blower motor according to claim 2, characterized in that The bottom plate (106) is provided with through holes (107) corresponding to the stator pins (202) one by one, and the stator pins (202) pass through the through holes (107) to be electrically connected to a circuit board (122) fixed on the bottom plate (106), and the second sealing member (133) is provided at the through holes (107) to seal the gap between the wall of the through holes (107) and the stator pins (202), and the two ends of the second sealing member (133) respectively pass over the end surface of the bottom plate (106).

18. The blower motor according to claim 17, characterized in that The second sealing member (133) comprises a main rod (134), the main rod (134) having a pin hole (135) matching the shape of the stator pin (202), the stator pin (202) passing through the pin hole (135) and having an interference fit with the wall of the pin hole (135); A plurality of first convex ribs (136) are provided on the outer wall of the main rod (134) at intervals along the axial direction, the first convex ribs (136) extend along the circumference of the main rod (134), and the first convex ribs (136) are interference fit with the wall of the through hole (107); The second sealing member (133) is made of rubber.

19. The blower motor according to claim 18, characterized in that The first rib (136) surrounds the main rod (134) for one circumference, and / or, The first convex rib (136) surrounds the main rod (134) for less than one circle, but the projections of the plurality of first convex ribs (136) in the axial direction of the main rod (134) form a circular ring shape.

20. The blower motor according to claim 18, characterized in that A top cap (137) is also provided at one end of the main rod (134), the top cap (137) abuts against the bottom plate (106), the pin hole (135) passes through the top cap (137), and the radial dimension of the top cap (137) is greater than the radial dimension of the first convex rib (136).

21. The blower motor according to claim 20, characterized in that A second convex rib (138) is provided on the side of the top cap (137) facing the circuit board (122), and the second convex 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 convex rib (138), and a closed space is formed between the circuit board (122) and the second convex rib (138).

22. The blower motor according to claim 2, characterized in that The outer periphery of the base (101) is provided with a plurality of connection parts (112). The blower motor further comprises a flange (300) and a connection assembly which is arranged in one-to-one correspondence with the connection portion (112) and is located on the inner side of the flange (300); the flange (300) is sleeved on the outer periphery of the base (101); and the connection portion (112) is connected to the flange (300) via the connection assembly.

23. The blower motor according to claim 22, characterized in that The plurality of connection portions (112) are evenly distributed around the outer circumference of the base (101); or, the plurality of connection portions (112) are symmetrically arranged relative to the diameter of the base (101).

24. The blower motor of claim 22, wherein: The connecting portion (112) comprises a support seat (113) extending radially along the base (101) and a guide column (114) provided on the support seat (113) and extending axially, and the inner side of the flange (300) has slots (301) arranged in a one-to-one correspondence with the guide columns (114); Each of the connecting components comprises a vibration-damping pad (400) and a locking piece (500); the vibration-damping pad (400) is embedded in the slot (301); the guide column (114) passes through a through hole (403) in the middle of the vibration-damping pad (400) and is connected to the locking piece (500); the vibration-damping pad (400) is compressed between the support seat (113) and the locking piece (500).

25. The blower motor according to claim 24, characterized in that The guide column (114) has a hollow channel (115), and the inner wall of the channel (115) is provided with an internal thread; the locking member (500) comprises a gasket (501) and a screw (503), and the threaded section (504) of the screw (503) passes through the inner hole (502) of the gasket (501) and enters the channel (115) of the guide column (114), and is threadedly connected with the channel (115); When the screw (503) and the guide column (114) are threadedly locked, the vibration-damping pad (400) is compressed between the gasket (501) and the support seat (113).

26. The blower motor according to claim 25, characterized in that 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).

27. The blower motor of claim 24, wherein: The axis of the guide column (114) is parallel to the axis of the sleeve (103) on the base (101).

28. The blower motor of claim 25, wherein: The flange (300) comprises a flange plate (302) and a protective 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); a side plate (108) of the base (101) passes through the flange hole (304), and a gap exists between the hole wall of the flange hole (304) and the side plate (108).

29. The blower motor according to claim 28, characterized in that The flange plate (302) is provided with a skirt plate (305) around the flange hole (304), and the slot hole (301) is opened on the skirt plate (305); The vibration damping pad (400) comprises 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) recessed toward 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, and the skirt plate (305) is embedded in the annular groove (402); The vibration-damping pad (400) is made of rubber.

30. The blower motor of claim 29, wherein: The upper end surface of the vibration-damping pad body (401) has a plurality of first buffer blocks (405) protruding outward, and the lower end surface 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).

31. The blower motor of claim 29, wherein: A reinforcing rib (404) is provided on the hole wall of the through hole (403), and the position of the reinforcing rib (404) corresponds to the position of the annular groove (402).

32. The blower motor of claim 1, wherein: The base (101) is made of aluminum alloy.

33. The blower motor according to claim 2, characterized in that The stator assembly comprises 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), and a bearing is arranged in the sleeve (103); the rotor assembly comprises a rotating shaft (205), a rotor housing (206) fixed on the rotating shaft (205), and a plurality of rotors (207) arranged 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).

34. The blower motor according to claim 33, characterized in that A first mounting groove (104) and a second mounting groove (105) are provided in the sleeve (103) at intervals along the axial direction; 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 rotatably cooperates with the first bearing (203) and the second bearing (204).

35. The blower motor of claim 33, wherein: The blower motor further comprises an impeller (600), wherein the impeller (600) comprises an impeller support (601) and blades (602) arranged around the impeller support (601), and one end of the rotating shaft (205) extending out of the rotor housing (206) is fixedly connected to the impeller support (601).

Images