CN220769741U - Blower fan - Google Patents

Abstract

The utility model discloses a blower, which comprises a heat dissipation plate; the rear cover component is covered on the heat dissipation plate and forms an accommodating cavity together with the heat dissipation plate; the circuit board is arranged in the accommodating cavity and is connected with the heat dissipation plate; the wire inserting part is respectively abutted with the rear cover assembly and the circuit board after the rear cover assembly is covered on the heat dissipation plate so as to lock the first end of the circuit board relative to the heat dissipation plate, the edge of the second end of the circuit board is abutted with a fastener, the fastener is tightly pressed against the circuit board and then locked relative to the heat dissipation plate, and the first end and the second end of the circuit board are oppositely arranged; the wire plugging part and the fastener apply a pressing force to the opposite ends of the circuit board so as to lock the circuit board; the motor body comprises a mounting base and a stator and rotor assembly. According to the circuit board locking device, the pressing force can be applied to the opposite ends of the circuit board through the wire inserting part and the fastening piece to lock the circuit board, the locking holes do not need to be formed in the circuit board, and the space utilization rate of the circuit board is effectively improved.

Description

Blower fan

Technical Field

The utility model relates to the field of fans, in particular to a blower.

Background

The blower is one of the components in the new energy automobile. The automobile blower drives air flow through the rotation of the impeller, and air in or outside the automobile is sucked into the blower, and the air flow passes through the air duct and is blown to various positions, so that the effects of radiating and refrigerating the automobile are achieved.

The electrical components in the air blower generally comprise a circuit board, and the fixing mode of the circuit board in the existing air blower generally adopts a mode that a locking hole is formed in a non-side edge of the circuit board, and then the circuit board is fixedly locked by penetrating the locking hole through a set screw and pressing the circuit board. And components cannot be arranged within 10mm around the hole position of the circuit board, so that the space utilization rate of the circuit board is low due to the locking mode of the circuit board in the existing blower. In addition, the grounding structure of the circuit board generally adopts the structure that the screws penetrate through the circuit board to realize grounding, and holes are formed in the circuit board, so that the space utilization rate of the circuit board is lower. There is also the effect that the existing screw fastening comprehensively considers fixing and grounding, and the circuit board middle area sets up tight hole to cooperate corresponding metal screw, in order to realize fixing and grounding simultaneously, this kind of setting can lead to the nearby welding that realizes of fastening screw, and circuit board structure is complicated, and the technology of assembly is also complicated.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the blower which applies a pressing force to the opposite ends of the circuit board through the wire insertion part and the fastener to lock the circuit board, so that a locking hole is not required to be formed in the circuit board, and the space utilization rate of the circuit board is effectively improved.

The utility model is realized by the following technical scheme:

a blower, comprising:

a heat dissipation plate;

the rear cover assembly is covered on the heat dissipation plate and forms an accommodating cavity together with the heat dissipation plate;

the circuit board is arranged in the accommodating cavity and is connected with the heat dissipation plate; the first end of the circuit board is connected with a wire inserting part, the wire inserting part is respectively abutted against the rear cover assembly and the circuit board after the rear cover assembly is covered on the heat dissipation plate so as to lock the first end of the circuit board relative to the heat dissipation plate, the edge of the second end of the circuit board is abutted with a fastener, the fastener is tightly pressed against the circuit board and then locked relative to the heat dissipation plate, and the first end and the second end of the circuit board are oppositely arranged; the wire insertion part and the fastener apply pressing force to the opposite ends of the circuit board so as to lock the circuit board;

the motor body comprises a mounting base, a stator assembly and a rotor assembly, wherein an assembly cavity is formed in the mounting base, and at least one part of the stator assembly and at least one part of the rotor assembly are arranged in the assembly cavity.

Further, a positioning groove is formed in the edge of the circuit board, a limiting column corresponding to the positioning groove is arranged on the heat dissipation plate, and at least one part of the limiting column is accommodated in the positioning groove to limit the circuit board.

Further, the limit post is connected with a fastener, one end of the fastener is provided with a pressing head, and the pressing head of the fastener can press the circuit board.

Further, the limit posts are provided in plurality, and the plurality of limit posts at least comprise two limit posts positioned at two opposite ends of the circuit board.

Further, the fastening piece is located inside the accommodating cavity, or part or all of the fastening piece is located outside the accommodating cavity and connected with the limiting post after passing through the mounting hole on the rear cover assembly.

Further, the heat dissipation plate is provided with a grounding protrusion.

Further, the grounding protrusions are arranged in four, and the four grounding protrusions are distributed in an annular array around the axis of the heat dissipation plate.

Further, the heat dissipation plate faces the board surface of the circuit board and forms a gap with the circuit board through the arranged grounding protrusions, one end of the circuit board, which faces the heat dissipation plate, is provided with a heat conduction medium, and the heat conduction medium fills in a preset position of the gap formed between the board surface and the circuit board.

Further, a sealing ring is arranged at the joint of the rear cover assembly and the heat dissipation plate, which forms the accommodating cavity, so as to seal the accommodating cavity.

Further, edge bulges extending along the axial direction of the radiating plate are arranged on the edge of the radiating plate; the sealing ring is provided with a radially extending step containing cavity, the step containing cavity comprises a first containing cavity and a second containing cavity which are mutually communicated, and a step surface is formed at the joint of the first containing cavity and the second containing cavity; the first containing cavity is matched with the edge bulge, and the cross section size of the first containing cavity is larger than that of the second containing cavity, so that the edge bulge is clamped in the first containing cavity by the step surface to radially limit the sealing ring.

Further, a plurality of positioning protrusions are formed on the surface of the heat dissipation plate; the sealing ring is provided with a plurality of positioning accommodating cavities matched with the positioning protrusions, and the positioning protrusions are arranged in the positioning accommodating cavities and form circumferential limiting on the sealing ring.

Further, the rear cover assembly is abutted with the sealing ring and applies a pressing force along the axial direction of the heat dissipation plate to the sealing ring so as to form axial limit on the sealing ring.

Further, the rear cover assembly includes a rear cover connected to the heat dissipation plate and pressed against the sealing ring so that the rear cover is tightly abutted against the sealing ring to form a first sealing portion.

Further, the back cover assembly further comprises a plate cover unit, the plate cover unit is provided with a sealing groove, at least a part of the sealing ring is accommodated in the sealing groove, the upper end of the sealing ring is tightly abutted with the upper wall forming the sealing groove to form a second sealing part, and the lower end of the sealing ring is tightly abutted with the lower wall forming the sealing groove to form a third sealing part.

Further, a damper avoiding gap is formed between the side wall of the rear cover adjacent to the first sealing portion and the side wall of the deck lid unit adjacent to the second sealing portion.

Further, the plate cover unit comprises a rear cover and a plate cover unit, the plate cover unit and the rear cover are arranged in a split mode, and the plate cover unit can be independent of the rear cover and detachably connected with the motor body.

Compared with the prior art, the utility model has the advantages that:

1. the wire plugging part and the fastening piece are used for applying pressing force to the opposite ends of the circuit board to lock the circuit board, a locking hole is not required to be formed in the circuit board, and the space utilization rate of the circuit board is effectively improved.

2. Through setting up the ground connection arch for the circuit board accessible realizes the ground connection with the mode of the protruding butt of ground connection, need not to set up unnecessary hole, the effectual space utilization who improves the circuit board.

3. Through setting up spacing post, realize carrying out the smart dress location to the circuit board.

Drawings

FIG. 1 is a schematic diagram of a blower according to a preferred embodiment of the present utility model;

FIG. 2 is a schematic view of the blower of FIG. 1 from another perspective;

FIG. 3 is a schematic view of the blower of FIG. 1 with the panel cover unit removed;

FIG. 4 is a schematic view of a portion of the blower of FIG. 1;

FIG. 5 is a cross-sectional view of section E-E of FIG. 2;

FIG. 6 is an enlarged view of circle A of FIG. 5;

FIG. 7 is a schematic cross-sectional view of a seal ring;

FIG. 8 is a cross-sectional view of section F-F of FIG. 2;

FIG. 9 is an enlarged view of circle B of FIG. 8;

FIG. 10 is a schematic structural view of a vibration damping pad;

FIG. 11 is a plan cross-sectional view of a vibration damping pad;

FIG. 12 is an exploded view of a portion of the structure of the blower of FIG. 1;

FIG. 13 is a schematic view of a further portion of the blower of FIG. 1;

FIG. 14 is an exploded view of a portion of the structure of FIG. 12;

fig. 15 is a schematic view of a part of the structure in fig. 12.

Detailed Description

The technical scheme of the utility model is further described in non-limiting detail below with reference to the preferred embodiments and the accompanying drawings. In the description of the present utility model, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. refer to the azimuth or positional relationship based on the azimuth or positional relationship shown in the drawings. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

As shown in fig. 1 to 15, a blower corresponding to a preferred embodiment of the present utility model includes a motor body 1, a heat radiating plate 2 connected to the motor body 1, a rear cover assembly 4 covered on the heat radiating plate 2, a vibration damping unit 7, and a circuit board 6. The rear cover assembly 4 and the heat dissipation plate 2 together enclose a containing cavity 43 for containing an electric device, wherein the electric device comprises a circuit board 6, and the circuit board 6 is arranged in the containing cavity 43 and connected with the heat dissipation plate 2 to conduct heat generated by the circuit board 6 to the heat dissipation plate 2 for heat dissipation. The vibration damping unit 7 is connected with the rear cover assembly 4 and the heat dissipation plate 2; vibration is generated when the motor body 1 is operated, thereby causing vibration of the heat radiating plate 2 connected to the motor body 1 and the rear cover assembly 4 connected to the heat radiating plate 2, and vibration of the rear cover assembly 4 and the heat radiating plate 2 is absorbed by the vibration absorbing unit 7 connected to the rear cover assembly 4 and the heat radiating plate 2 to damp the blower of the present utility model.

The motor body 1 includes a mounting base, a stator assembly, and a rotor assembly. The mounting base is formed with an assembly cavity in which at least a part of the stator assembly and the rotor assembly are disposed, and the stator assembly and the rotor assembly are connected to the heat dissipation plate 2. The assembly cavity can be connected to the outside through the heat dissipation channel, so that the outside air can flow into the assembly cavity from the heat dissipation channel, and at least a part of the outside air flows through the heat dissipation plate 2 when flowing into the assembly cavity, so that the heat of the heat dissipation plate 2 is taken away. The heat dissipation channel may be disposed in the rear cover assembly 4, for example, a cavity communicating with the outside and the assembly cavity is formed in the rear cover assembly 4, so that the cavity forms the heat dissipation channel.

Referring further to fig. 1, the rear cover assembly 4 includes a rear cover 41 connected to the heat dissipation plate 2, and a plate cover unit 42. The rear cover 41 is covered on the heat dissipation plate 2 and encloses with the heat dissipation plate 2 into a containing cavity 43 for placing electric devices, wherein the edge of the rear cover 41 is provided with a through hole, the heat dissipation plate 2 is provided with a threaded hole opposite to the through hole of the rear cover 41, and the rear cover 41 and the heat dissipation plate 2 are connected with each other through screws penetrating through the through hole and in threaded connection with the heat dissipation plate 2. The panel cover unit 42 includes a panel cover 424 and a mounting flange 423 connected to each other. Referring to fig. 3, the back cover 41 and the plate cover 424 in the conventional back cover assembly 4 are mostly formed integrally, but in the actual use process, because a part of users can design the plate cover 424 and the mounting flange 423 in the back cover assembly 4 by themselves, in order to meet the market demand, the back cover assembly 4 of the present utility model adopts the plate cover unit 42 and the back cover 41 which are arranged in a split manner, and the plate cover unit 42 can be detachably connected with the motor body 1 independently of the back cover 41, so that the blower of the present utility model can detach the plate cover unit 42 and then carry out single shipment. In addition, if the single machine after the plate cover unit 42 is disassembled fails, the single machine can be independently replaced without replacing the plate cover unit 42; and the single machine after the plate cover unit 42 is disassembled has smaller overall volume compared with the blower, and the single machine shipment can also reduce the shipment cost.

As shown in fig. 12, the vibration damping unit 7 includes a seal ring 3 and a vibration damping pad 5 made of flexible materials. The sealing ring 3 and the vibration reduction pad 5 are preferably made of thirty-degree natural rubber, so that the sealing ring 3 and the vibration reduction pad 5 are softer in material, good in buffering effect and capable of effectively reducing vibration transmission; and the sealing ring 3 and the vibration reduction pad 5 which are made of thirty-degree natural rubber are not easy to generate edge tilting after being compressed.

With further reference to fig. 9 to 10, the vibration damping pad 5 is sleeved on the heat dissipation plate 2, and an outer wall of the vibration damping pad 5 abuts against the rear cover assembly 4 to damp the heat dissipation plate 2 and the rear cover assembly 4. Specifically, the heat dissipation plate 2 includes a main body portion 21 and a connection arm 23 formed to extend outward from the main body portion 21; the damping pad 5 is sleeved on the connecting arm 23. In order to improve the vibration reduction effect of the vibration reduction pad 5 on the heat dissipation plate 2, the vibration reduction pad 5 is provided with an embedded groove 51 matched with the connecting arm 23; the vibration reduction pad 5 forming the embedded groove 51 is coated on the connecting arm 23 and is fit and attached to the connecting arm 23, so that the inner wall forming the embedded groove 51 in the vibration reduction pad 5 is uniformly attached to the outer wall of the connecting arm 23 and can bear the impact force from the connecting arm 23, so that the force acting on the vibration reduction pad 5 when the connecting arm 23 of the heat radiation plate 2 vibrates can uniformly act on the inner wall surface forming the embedded groove 51 in the vibration reduction pad 5 and opposite to the impact force direction, the uniformity of the stress of each point of the inner wall surface is ensured, and the vibration reduction effect of the vibration reduction pad 5 on the heat radiation plate 2 is improved. In addition, the embedded groove 51 matched with the connecting arm 23 can enable the connecting arm 23 to be closely attached to the vibration-damping pad 5 in the radial direction when the connecting arm is connected with the vibration-damping pad 5, so that the vibration-damping effect of the vibration-damping pad 5 on the heat-radiating plate 2 is further improved. In addition, by coating the connecting arm 23 with the vibration-damping pad 5 having the embedded groove 51, the vibration-damping pad 5 can fully bear the connecting arm 23; compared with the existing vibration damping pad 5 with the annular groove for bearing the connecting arm 23, the vibration damping pad 5 can avoid the collapse and deformation of the vibration damping pad 5 towards the empty position when bearing axial force due to the fact that the annular groove is empty in the part of the vibration damping pad 5 which does not contain the connecting arm 23 after the annular groove is formed.

With further reference to fig. 11, the insertion groove 51 is formed in the main body 56 of the damper pad 5. The embedded groove 51 may be specifically formed by extending from the body 56 to the side of the connecting arm 23 along the longitudinal direction of the connecting arm 23. The thickness of the embedded groove 51 in the axial direction is 0.2 to 0.3 times the thickness of the main body portion 56, so as to avoid the influence of the thicker thickness of the embedded groove 51 on the damping effect of the damping pad 5. The side wall which surrounds the embedded groove 51 and is parallel to the axial direction of the vibration reduction pad 5 is formed, and the thickness D1 along the radial direction of the vibration reduction pad 5 is at least 0.5 times of the minimum distance D3 along the radial direction of the vibration reduction pad 5 between the side surface of the main body part 56 facing the connecting arm 23 and the inner wall of the main body part 56; so as to avoid the influence of the thickness of the side wall of the part of the vibration-damping pad 5 used for coating the connecting arm 23 being thinner after the embedded groove 51 is formed, and the coating effect of the vibration-damping pad 5 on the connecting arm 23. Preferably, the depth D2 of the embedded groove 51 along the radial direction of the vibration damping pad 5 may be set to be at least 0.5 times the minimum distance D3 along the radial direction of the vibration damping pad 5 between the side surface of the main body 56 facing the connecting arm 23 and the inner wall of the main body 56; so as to ensure the depth of the damping pad 5 coating the connecting arm 23 and improve the coating effect of the damping pad 5 on the connecting arm 23. The open end of the embedded groove 51 is provided with a cambered surface section 511 and a plane section 512. The planar segments 512 are provided with a pair, and the pair of planar segments 512 are disposed on opposite sides of the curved segment 511.

The vibration damping pad 5 is connected with the heat radiating plate 2 and also connected with the rear cover assembly 4 to simultaneously damp the rear cover assembly 4. Wherein the plate cover assembly 42 in the rear cover assembly 4 is formed with a receiving cavity 425 for receiving the vibration-damping pad 5.

The damping pad 5 is disposed in the accommodating cavity 425, one end of the damping pad 5 is abutted against the plate cover 424, the other end is abutted against the mounting flange 423, and the side wall of the damping pad 5 disposed in the accommodating cavity 425 is abutted against the plate cover assembly 42 to increase the contact area between the damping pad 5 and the rear cover assembly 4, so that the damping effect of the damping pad 5 on the rear cover assembly 4 is improved. Wherein, the damping pad 5 may be precompressed when disposed in the receiving cavity 425 to enhance the damping effect of the damping pad 5, the compression amount of the damping pad 5 is preferably 1.6%.

In addition, in order to facilitate the installation of the vibration-damping pad 5, the vibration-damping pad 5 is provided with a socket hole 52, and the rear cover assembly 4 is provided with a socket post 422 which can be penetrated through the socket hole 52 so that the vibration-damping pad 5 provided with the socket hole 52 can be sleeved on the rear cover assembly 4. Specifically, the socket post 422 specifically includes a first socket post 4221 disposed on the mounting flange 423 and a second socket post 4222 disposed on the plate cover 424, and when the mounting flange 423 is connected to the plate cover 424, the first socket post 4221 and the second socket post 4222 abut and jointly form the socket post 422. The installation of the vibration damping pad 5 can be facilitated by providing the socket post 422 composed of the first socket post 4221 and the second socket post 4222.

Since the vibration-damping pad 5 is provided with the sleeve-joint hole 52 and the embedded groove 51 at the same time, the wall thickness of the side wall between the embedded groove 51 and the sleeve-joint hole 52 is thinner, and in order to compensate the reduced wall thickness of the embedded groove 51, the inner wall of the vibration-damping pad 5, which forms the sleeve-joint hole 52, is provided with the first bulge 53, at least one part of the first bulge 53 corresponds to the position of the embedded groove 51 to compensate the wall thickness of the vibration-damping pad 5 at the position where the embedded groove 51 is formed; specifically, the first protruding portion 53 may be slightly larger than the size of the embedded groove 51, that is, a portion of the first protruding portion 53 corresponds to the position of the embedded groove 51, and another portion surrounds the portion of the first protruding portion 53 corresponding to the position of the embedded groove 51. The wall thickness of the vibration-damping pad 5 reduced by the provision of the embedded groove 51 is compensated by the provision of the first protruding part 53, so that the situation that the wall between the embedded groove 51 and the sleeve hole 52 in the vibration-damping pad 5 is collapsed and deformed due to the thin thickness is avoided.

In order to facilitate the installation and positioning of the vibration-damping pad 5, at least one second protruding portion 54 is arranged on the inner wall of the sleeve-joint hole 52, the second protruding portion 54 is arranged at intervals with the first protruding portion 53, the second protruding portion 54 and the first protruding portion 53 can be abutted against the sleeve-joint column 422, the arc surfaces of the first protruding portion 53 and the second protruding portion 54, which are abutted against the sleeve-joint column 422, are identical to the arc of the outer wall of the sleeve-joint column 422, and the circle centers of the arc surfaces of the first protruding portion 53 and the second protruding portion 54, which are abutted against the sleeve-joint column 422, are all located on the central axis of the vibration-damping pad 5, so that the first protruding portion 53 and the second protruding portion 54 can center the sleeve-joint column 422.

In order to firmly connect the vibration-damping pad 5 to the rear cover assembly 4, the rear cover assembly 4 is further provided with a screw that sequentially connects the first socket post 4221 and the second socket post 4222. Wherein, the first sleeve-joint post 4221 is provided with a through hole, the second sleeve-joint post 4222 is provided with a threaded hole, so that the screw can be arranged on the first sleeve-joint post 4221 in a penetrating way and in threaded connection with the second sleeve-joint post 4222 to lock the vibration damping pad 5 between the plate cover 424 and the mounting flange 423, and meanwhile, the screw can also realize the fixed connection between the plate cover 424 and the mounting flange 423.

Preferably, the upper and lower ends of the vibration-damping pad 5 are further provided with protruding ribs 55, and the protruding ribs 55 extend in the radial direction of the vibration-damping pad 5. The protruding ribs 55 at the upper and lower ends of the vibration-damping pad 5 are abutted against the plate covers 424 and the mounting flanges 423 located at the upper and lower sides of the vibration-damping pad 5, so that the vibration-damping pad 5 is connected with the rear cover assembly 4 and then bears vertical press-fitting force applied from the plate covers 424 and the mounting flanges 423, and the press-fitting force is perpendicular to the length direction of the protruding ribs 55. The number of the protruding ribs 55 is preferably plural, and the number of the protruding ribs 55 at the upper end and the lower end of the vibration-damping pad 5 is the same, and the protruding ribs 55 at the same end are equally spaced so that the stress of each protruding rib 55 is balanced. The existing vibration damping pad 5 has no limit in the circumferential direction when the connecting arm is connected with the existing vibration damping pad due to the exposed annular groove, so that the positions of the protruding ribs on the surface of the existing vibration damping pad cannot be unique and the protruding ribs are circumferentially distributed in a ring shape, and therefore, the stress direction of the protruding ribs of the existing vibration damping pad is changeable when the protruding ribs of the existing vibration damping pad bear the press-fit force, and the phenomenon that the stress of the protruding ribs of the vibration damping pad is unbalanced is easily caused. The protruding ribs 55 of the vibration damping pad 5 of the present utility model all adopt a structure extending along the radial direction of the vibration damping pad 5, so that the stress direction of each protruding rib 55 is unique and the stress is relatively balanced.

Further, since the vibration-damping pad 5 is intermittently compressed and released by the heat-radiating plate 2 and the rear cover assembly 4 while absorbing the vibration from the heat-radiating plate 2 and the rear cover assembly 4, a gap is formed between the inner sidewall of the vibration-damping pad 5 and the socket post 422 in order to compensate for the release amount of deformation generated when the vibration-damping pad 5 is released. Specifically, the protruding portion formed on the inner side wall of the vibration-damping pad 5 extends towards the socket post 422 and abuts against the socket post 422 to prevent the vibration-damping pad 5 from shaking after being sleeved on the socket post 422, and the rest portion of the inner side wall of the vibration-damping pad 5 maintains a gap with the socket post 422 so that the gap can compensate the deformation release amount of the vibration-damping pad 5 when the compression amount of the vibration-damping pad 5 is released.

With further reference to fig. 6, 7 and 15, the sealing ring 3 is sleeved around the heat dissipation plate 2, wherein the sealing ring 3 is preferably in micro interference fit with the heat dissipation plate 2. The sealing ring 3 is provided with a notch 38 avoiding the vibration reduction pad 5; and the outer wall of the sealing ring 3 abuts against the rear cover assembly 4 to reduce the relative vibration between the rear cover assembly 4 and the heat dissipation plate 2. Specifically, the plate cover unit 42 in the rear cover assembly 4 is formed with a seal groove 421, and a part of the seal ring 3 is provided in the seal groove 421 and abuts against the plate cover unit 42; wherein the plate cover unit 42 includes upper and lower walls for surrounding and forming the sealing groove 421 and an inner wall connecting the upper and lower walls, the upper and lower walls and the inner wall together forming the sealing groove 421 having an opening from which the sealing ring 3 is fitted into the sealing groove 421. Through the joint vibration reduction of the sealing ring 3 and the vibration reduction pad 5, besides vibration reduction of the vibration reduction pad 5 at the connecting arm 23 between the heat radiation plate 2 and the rear cover assembly 4, the sealing ring 3 which is sleeved on the heat radiation plate 2 can also reduce vibration of the heat radiation plate 2 and the rear cover assembly 4, and the vibration reduction area is increased to improve the vibration reduction effect of the vibration reduction unit 7; and the sealing ring 3 is sleeved on the heat dissipation plate 2 in a surrounding manner, and the vibration reduction pad 5 is arranged at the notch 38 of the sealing ring 3, so that the installation positions of the sealing ring 3 and the vibration reduction pad 5 are reasonable. With particular reference to fig. 6, it is noted that a damper avoiding gap is formed between the side wall of the back cover 41 adjacent to the first sealing portion 33 and the side wall of the cover plate unit 42 adjacent to the second sealing portion 34, and no interference occurs during the damper process, and no mutual vibration influence occurs between the two.

The upper and lower ends of the sealing ring 3 are respectively provided with end ribs 36, the sealing ring 3 is abutted with the upper and lower walls forming the sealing groove 421 through a pair of end ribs 36 at the upper and lower ends to form interference fit, and the upper wall and the lower wall forming the sealing groove 421 can be used for flattening the end ribs 36 of the sealing ring 3 so as to damp the heat dissipation plate 2 and the plate cover unit 42 when the heat dissipation plate 2 or the plate cover unit 42 generates axial vibration, and meanwhile, noise generated when the heat dissipation plate 2 or the plate cover unit 42 generates vibration can be reduced. The compression of the seal ring 3 is preferably 7.5%.

At least a part of the side wall of the seal ring 3 is accommodated in the seal groove 421 and forms a gap with the inner wall forming the seal groove 421; when the sealing ring 3 and the plate cover unit 42 vibrate relatively radially, the side wall of the sealing ring 3 can abut against the inner wall of the sealing groove 421 formed in the plate cover unit 42 and deform elastically to perform radial vibration damping.

The sealing ring 3 can not only damp the heat dissipation plate 2 and the plate cover unit 42, but also seal the accommodating cavity 43 to prevent water vapor from entering the accommodating cavity 43 to damage electric devices in the accommodating cavity 43. At least a part of the sealing ring 3 is disposed at a junction between the rear cover assembly 4 and the heat dissipation plate 2 to form the accommodating cavity 43, so as to seal the accommodating cavity 43.

Specifically, three sealing portions are formed between the seal ring 3 and the plate cover unit 42 to form a three-layer seal. The upper end of a part of the seal ring 3 provided in the seal groove 421 is in close contact with the upper wall forming the seal groove 421 to form the second seal portion 34, and the lower end of the seal ring 3 is in close contact with the lower wall forming the seal groove 421 to form the third seal portion 35. Wherein the third sealing part 35 is closer to the motor body 1 than the second sealing part 34, and the third sealing part 35 can prevent water vapor in the motor body 1 from entering the accommodating cavity 43; the second sealing portion 34 can assist the third sealing portion 35 to prevent the water vapor in the motor body 1 from entering the accommodating cavity 43, that is, the water vapor which is not completely blocked by the third sealing portion 35 moves to the second sealing portion 34 to be sealed again by the second sealing portion 34. Meanwhile, the rear cover 41 is connected to the heat dissipation plate 2 and pressed against the sealing ring 3, so that the rear cover 41 is tightly abutted against the sealing ring 3 to form the first sealing part 33. The first sealing portion 33 can effectively prevent moisture between the rear cover 41 and the plate cover 424 from entering the accommodating chamber 43. The three sealing parts can be sealed to ensure that no water vapor enters the accommodating cavity 43 basically, and the electric devices in the accommodating cavity 43 are protected from being damaged by the water vapor.

In order to prevent the sealing ring 3 from shaking in the using process of the blower, the utility model limits the sealing ring 3 axially, circumferentially and radially so as to prevent the sealing ring 3 from shaking.

Wherein, the sealing ring 3 is connected with the heat dissipation plate 2 in an adapting way to form radial limit; specifically, the heat dissipation plate 2 includes a main body portion 21, and an edge projection 22 provided at an edge of the main body portion 21 and extending in an axial direction of the heat dissipation plate 2; the seal ring 3 is provided with an edge projection 22 extending in the axial direction of the heat radiation plate 2. The sealing ring 3 is provided with a radially extending step containing cavity 31, the step containing cavity 31 comprises a first containing cavity 311 and a second containing cavity 312 which are mutually communicated, and a step surface 313 is formed at the joint of the first containing cavity 311 and the second containing cavity 312. The first accommodating cavity 311 is adapted to the edge protrusion 22 and is used for accommodating the edge protrusion 22, and the second accommodating cavity 312 is adapted to the main body 21 of the heat dissipating plate 2 and is capable of accommodating a part of the structure of the main body 21 in the second accommodating cavity 312. The cross-sectional dimension of the first accommodating cavity 311 is larger than that of the second accommodating cavity 312, so that the edge protrusion 22 is clamped in the first accommodating cavity 311 by the step surface 313 to radially limit the sealing ring 3.

Further, referring to fig. 14, a plurality of positioning projections 211 are formed on the surface of the main body 21 of the heat dissipating plate 2; the sealing ring 3 is also provided with a plurality of positioning accommodating cavities 32 which are matched with the positioning protrusions 211, and when the sealing ring 3 is sleeved on the heat dissipation plate 2, the positioning protrusions 211 are arranged in the positioning accommodating cavities 32 and limit the inner wall forming the positioning accommodating cavities 32 so that the positioning protrusions 211 form circumferential limit on the sealing ring 3.

Meanwhile, the rear cover 41 in the rear cover assembly 4 is abutted against the sealing ring 3 to form the first sealing part 33, and the rear cover 41 can also apply a pressing force along the axial direction of the heat dissipation plate 2 to the sealing ring 3 to press the sealing ring 3 and form axial limit to the sealing ring 3.

With further reference to fig. 12-15, the electrical device disposed within the receiving cavity 43 includes a circuit board 6. The wiring board 6 is connected to the heat dissipation plate 2 to dissipate heat through the heat dissipation plate 2. Because components cannot be arranged at the 10mm position of the edge of the circuit board 6 where the holes are formed, the space utilization rate of the circuit board 6 is low; in order to improve the space utilization rate of the circuit board 6, a grounding protrusion 24 is arranged on one side of the heat dissipation plate 2 facing the circuit board 6, and the grounding protrusion 24 is abutted against the circuit board 6 so as to realize grounding of the circuit board 6; compared with the traditional circuit board 6, the circuit board 6 realizes grounding by adopting four screws penetrating through the circuit board 6, holes for the screws to penetrate are not required to be formed in the circuit board 6, and the space utilization rate of the circuit board 6 is effectively improved. Wherein, the grounding protrusions 24 are preferably four, and the four grounding protrusions 24 are distributed in an annular array around the axis of the heat dissipation plate 2; the four grounding protrusions 24 are abutted against the circuit board 6 to realize grounding of the circuit board 6, and simultaneously support the circuit board 6, so that a gap is formed between the circuit board 6 and the plate surface 26 of the heat dissipation plate 2 facing the circuit board 6.

To facilitate heat dissipation of the circuit board 6, a side of the circuit board 6 facing the heat dissipation plate 2 is provided with a heat conductive medium filled in a predetermined position of a gap formed between the plate surface 26 and the circuit board 6. The preset position is a concentrated distribution position of the electronic components, and the concentrated distribution position is a position of heat mainly generated in the working process. Specifically, the thickness of the heat-conducting medium is greater than the above gap before the circuit board 6 is connected to the heat dissipation plate 2, and the heat-conducting medium is in a paste structure, when the circuit board 6 is connected to the heat dissipation plate 2, the paste heat-conducting medium can be pressed by the circuit board 6 and the heat dissipation plate 2 to tightly abut against the circuit board 6 and the heat dissipation plate 2, so that the heat-conducting medium can be connected to the heat dissipation plate 2 when the circuit board 6 is connected to the heat dissipation plate 2, and the heat of the circuit board 6 is conducted to the heat dissipation plate 2 through the heat-conducting medium. Wherein the heat conducting medium is specifically heat conducting mud.

To further improve the space utilization of the circuit board 6, one end of the circuit board 6 is connected with a wire insertion part 61, and the wire insertion part 61 is abutted against the circuit board 6 and compresses the circuit board 6; the other end edge of the circuit board 6 is connected with a fastener 62, and the fastener 62 can press the circuit board 6. The wire insertion portion 61 and the fastener 62 apply pressing forces to opposite ends of the wiring board 6 to lock the wiring board 6. Note that, the wire insertion portion 61 abuts against the rear cover assembly 4 after the rear cover assembly 4 is covered on the heat dissipation plate 2, and the rear cover assembly has a pressing action on the wire insertion portion 61, so that the wire insertion portion can press the circuit board 6. Wherein the wire insertion portion 61 is provided at an end of the wiring board 6 facing away from the heat dissipation plate 2 to apply a pressing force toward the heat dissipation plate 2 to the wiring board 6. The wiring board 6 is locked by the wire insertion part 61 and the fastener 62, and a hole for the penetration of a locking screw is not required to be formed in the wiring board 6, so that the space utilization rate of the wiring board 6 is improved.

To position the circuit board 6, the edge of the circuit board 6 is provided with a positioning groove 63, and the heat dissipation plate 2 is provided with a limit post 25 corresponding to the positioning groove 63. When the circuit board 6 is connected to the heat dissipation plate 2, at least a portion of the limiting post 25 is received in the positioning groove 63 and abuts against a sidewall forming the positioning groove 63 to limit the circuit board 6. Specifically, the plurality of limiting posts 25 are disposed, and the plurality of limiting posts 25 at least include two limiting posts 25 disposed at opposite ends of the circuit board 6, and the two limiting posts 25 disposed at opposite ends of the circuit board 6 are distributed in diamond-shaped four corners with the wire insertion portion 61 and the fastener 62 disposed at opposite ends of the circuit board 6 and the wire insertion portion 61. Wherein, the limit posts 25 are specifically three, one of the three limit posts 25 is connected with a fastener 62 positioned at one end of the circuit board 6 opposite to the plug wire portion 61, and the other two limit posts 25 are positioned at two sides of the circuit board 6 adjacent to one side connected with the plug wire portion 61. Preferably, the three limiting posts 25 are connected with the fastening pieces 62, wherein the fastening pieces 62 are provided with a pressing head 621 which can be abutted against the circuit board 6 and press the circuit board 6. The fastener 62 is specifically a screw, the limit post 25 is provided with a threaded hole, the threaded post of the screw is in threaded connection with the limit post 25, and the screw head of the screw presses the circuit board 6 to stabilize the circuit board 6. It should be noted that, in one possible embodiment, the screw is located inside the accommodating cavity 43, and the screw head of the screw is pressed against the circuit board 6 by the threaded connection with the limit post 25 so as to stabilize the circuit board 6; in another possible embodiment, part or all of the screws are located outside the accommodating cavity 43, the screws pass through the mounting holes on the rear cover assembly 4 first and then are in threaded connection with the limiting posts 25, and at this time, the structure at the mounting holes on the rear cover assembly 4 can be abutted against the circuit board 6 and compress the circuit board 6, so that the effect of stabilizing the circuit board 6 is achieved.

When the motor is used, the motor main body operates and enables the heat dissipation plate 2 and the rear cover assembly 4 to vibrate, and the sealing ring 3 and the vibration reduction pad 5 which are connected with the heat dissipation plate 2 and the rear cover assembly 4 absorb and reduce the vibration of the heat dissipation plate 2 and the rear cover assembly 4 through the elasticity of the motor main body. The sealing ring 3 also forms three seals with the rear cover assembly 4 to prevent moisture from entering the accommodating chamber 43. The wiring board 6 is pressed and fixed by the fastener 62 and the plug wire portion 61 and conducts heat to the heat dissipation plate 2 through the heat conduction mud to achieve heat dissipation. The vibration reduction unit 7 consisting of the vibration reduction pad 5 and the sealing ring 3 is arranged, so that the area of the vibration reduction part of the heat dissipation plate 2 and the rear cover assembly 4 is increased, and the vibration reduction effect is improved; the connecting arm 23 wrapping the vibration damping pad 5 on the heat dissipation plate 2 can complete bearing the connecting arm 23, and is not easy to deform; meanwhile, the vibration reduction pad 5 is matched and attached with the connecting arm 23, so that each surface of the vibration reduction pad 5 for bearing the connecting arm 23 is uniformly contacted with the connecting arm 23, and the strength balance of each point on the bearing surface is ensured. The wire plugging portion 61 and the fastening piece 62 are used for applying pressing force to the two opposite ends of the circuit board 6 to lock the circuit board 6, so that locking holes do not need to be formed in the circuit board 6, and the space utilization rate of the circuit board 6 is effectively improved. Radial limit of the sealing ring 3, circumferential limit of the sealing ring 3 by the positioning column and axial limit of the rear cover assembly 4 and the sealing ring 3 are realized through the edge bulge 22 of the heat radiation plate 2, so that the sealing ring 3 is prevented from moving in the running process of the blower, and the sealing stability of the sealing ring 3 is improved.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (16)

1. A blower, comprising:

a heat dissipation plate (2);

the rear cover assembly (4) is covered on the heat dissipation plate (2) and forms a containing cavity (43) together with the heat dissipation plate (2);

the circuit board (6) is arranged in the accommodating cavity (43) and is connected with the heat dissipation plate (2); the first end of the circuit board (6) is connected with a wire inserting part (61), the wire inserting part (61) is respectively abutted with the rear cover assembly (4) and the circuit board (6) after the rear cover assembly (4) is covered on the heat dissipation plate (2) so as to lock the first end of the circuit board (6) relative to the heat dissipation plate (2), the edge of the second end of the circuit board (6) is abutted with a fastening piece (62) and the fastening piece (62) is tightly pressed against the circuit board (6) and then locked relative to the heat dissipation plate (2), and the first end and the second end of the circuit board (6) are oppositely arranged; the wire insertion part (61) and the fastener (62) apply pressing force to the opposite ends of the circuit board (6) so as to lock the circuit board (6);

the motor body (1) comprises a mounting base, a stator assembly and a rotor assembly, wherein an assembly cavity is formed in the mounting base, and at least one part of the stator assembly and at least one part of the rotor assembly are arranged in the assembly cavity.

2. The blower according to claim 1, wherein a positioning groove (63) is provided at an edge of the circuit board (6), the heat dissipation plate (2) is provided with a limiting post (25) corresponding to the positioning groove (63), and at least a part of the limiting post (25) is accommodated in the positioning groove (63) to limit the circuit board (6).

3. The blower according to claim 2, wherein the stopper post (25) is connected with a fastener (62), a pressing head (621) is formed at one end of the fastener (62), and the pressing head (621) of the fastener (62) can press the circuit board (6).

4. A blower according to claim 2, wherein the plurality of stopper posts (25) is provided, and wherein at least two of the plurality of stopper posts (25) include stopper posts (25) at opposite ends of the circuit board (6).

5. A blower according to claim 3, characterized in that the fastening member (62) is located inside the accommodating chamber (43), or part or all of the fastening member (62) is located outside the accommodating chamber and is connected to the limit post (25) after passing through a mounting hole in the rear cover assembly (4).

6. A blower according to any one of claims 1-4, characterized in that the heat radiating plate (2) is provided with a grounding protrusion (24).

7. A blower according to claim 6, characterized in that the grounding protrusions (24) are provided in four, four of the grounding protrusions (24) being distributed in a circular array around the axis of the heat radiating plate (2).

8. A blower according to claim 6, characterized in that the plate surface (26) of the heat radiation plate (2) facing the circuit board (6) is formed with a gap with the circuit board (6) through the grounding projection (24) provided, and that one end of the circuit board (6) facing the heat radiation plate (2) is provided with a heat conduction medium filled at a preset position of the gap formed between the plate surface (26) and the circuit board (6).

9. A blower according to claim 1, characterized in that a sealing ring (3) is provided at the junction of the rear cover assembly (4) and the heat radiating plate (2) forming the accommodating chamber (43) to seal the accommodating chamber (43).

10. A blower according to claim 9, characterized in that the edge of the heat-radiating plate (2) is provided with an edge projection (22) extending in the axial direction of the heat-radiating plate (2); the sealing ring (3) is provided with a radially extending step containing cavity (31), the step containing cavity (31) comprises a first containing cavity (311) and a second containing cavity (312) which are mutually communicated, and a step surface (313) is formed at the joint of the first containing cavity (311) and the second containing cavity (312); the first accommodating cavity (311) is matched with the edge protrusion (22), and the cross section size of the first accommodating cavity (311) is larger than that of the second accommodating cavity (312), so that the edge protrusion (22) is clamped in the first accommodating cavity (311) by the step surface (313) to radially limit the sealing ring (3).

11. A blower according to any one of claims 9-10, characterized in that a surface of the heat radiation plate (2) is formed with a plurality of positioning projections (211); the sealing ring (3) is provided with a plurality of positioning accommodating cavities (32) which are matched with the positioning protrusions (211), and the positioning protrusions (211) are arranged in the positioning accommodating cavities (32) and form circumferential limiting for the sealing ring (3).

12. A blower according to any one of claims 9-10, characterized in that the rear cover assembly (4) abuts against the sealing ring (3) and applies a pressing force in the axial direction of the heat radiation plate (2) to the sealing ring (3) to form an axial limit for the sealing ring (3).

13. A blower according to claim 9, wherein the rear cover assembly (4) includes a rear cover (41), the rear cover (41) being connected to the heat radiating plate (2) and pressed against the seal ring (3) so that the rear cover (41) closely abuts the seal ring (3) and forms a first seal portion (33).

14. The blower according to claim 13, wherein the rear cover assembly (4) further includes a plate cover unit (42), the plate cover unit (42) is provided with a seal groove (421), at least a portion of the seal ring (3) is accommodated in the seal groove (421), and an upper end of the seal ring (3) is in close contact with an upper wall forming the seal groove (421) and forms a second seal portion (34), and a lower end of the seal ring (3) is in close contact with a lower wall forming the seal groove (421) and forms a third seal portion (35).

15. The blower according to claim 14, wherein a damper avoiding gap is formed between a side wall of the rear cover (41) adjacent to the first seal portion (33) and a side wall of the plate cover unit (42) adjacent to the second seal portion (34).

16. The blower according to claim 14, wherein the plate cover unit (42) includes a rear cover (41) and a plate cover unit (42), the plate cover unit (42) is provided separately from the rear cover (41), and the plate cover unit (42) is detachably connectable to the motor body (1) independently of the rear cover (41).