A blowing device

Abstract

The utility model discloses a blowing device, wherein a motor comprises an outer shell and an outer cover shell, a central cylinder is installed in the middle of the outer shell, a stator assembly and a rotor assembly are installed on the central cylinder, and the stator assembly and the rotor assembly are located in an installation chamber; a fan is fixedly installed on the rotating shaft of the rotor assembly; an insulating cover plate is installed at one end of the stator assembly, and a terminal is arranged on the stator assembly, and the terminal penetrates the insulating cover plate; an external connecting plug is fixed on the outer cover shell, and the external connecting plug is connected with the terminal, an elastic ring is arranged between the central cylinder and the outer shell, the elastic ring is sleeved on the central cylinder and squeezed between the central cylinder and the outer shell; a central cylinder accommodating hole is arranged on the central cylinder, a terminal accommodating hole is opened on the elastic ring, a terminal sealing sleeve is sleeved on the terminal, the terminal sealing sleeve is located in the terminal accommodating hole and is sealed with the central cylinder accommodating hole; the device can ensure effective vibration reduction between components, simplify the installation difficulty of the blower, and improve the installation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of blower manufacturing, in particular to a blowing device. Background Art

[0002] A blower is a mechanical device used to generate airflow, air pressure or vacuum. A blower mainly relies on rotating blades or impellers to suck in and discharge air or gas to increase the effect of airflow, air pressure or vacuum.

[0003] Application No. 201811049099.9 discloses a blasting device, which includes: a fan; a motor that rotates the fan; an insulating cover that covers the stator and wiring harness of the motor; a terminal that is electrically connected to the wiring harness and protrudes from the insulating cover; a printed circuit board that is electrically connected to the terminal; a central cylinder that includes a receiving hole for receiving the terminal and supports the stator; and an elastic body that is sandwiched between the insulating cover and the central cylinder and formed into a ring shape, wherein the elastic body includes a first sealing portion that surrounds the terminal in the receiving hole, the insulating cover includes a protrusion, the protrusion height from the insulating cover is lower than the protrusion height of the terminal from the insulating cover, and the protrusion supports the first sealing portion; the following disadvantages exist during use:

[0004] 1. When the stator is mounted on the insulating cover, the terminal needs to be aligned with the first sealing part and the terminal needs to be passed through the through hole on the first sealing part. The installation is difficult and requires high precision. In particular, each stator terminal needs to be welded with the wiring harness. During welding, the terminal may be thermally deformed, resulting in inaccurate terminal position. In this way, it is more difficult to align the terminal with the through hole on the first sealing part.

[0005] 2. The stator needs to be additionally processed with buckle claws, and the insulating cover plate also needs to be processed with notches that are convenient for matching with the buckle claws, making the processing process cumbersome. Utility Model Content

[0006] The technical problem to be solved by the utility model is: a blowing device, which can ensure effective vibration reduction between components to reduce noise when the device is in use, and at the same time simplify the installation difficulty of the blower and improve the installation efficiency.

[0007] In order to solve the above technical problems, the technical solution of the utility model is: a blowing device, including a motor, the motor including an outer shell and an outer cover shell fixed to each other, an installation chamber formed between the outer shell and the outer cover shell, a central cylinder is installed in the middle of the outer shell, a stator assembly and a rotor assembly are installed on the central cylinder, and the stator assembly and the rotor assembly are located in the installation chamber; a fan is fixedly installed on the rotating shaft of the rotor assembly; an insulating cover plate covering the end of the stator assembly is installed at one end of the stator assembly, and a terminal electrically connected to a wiring harness is provided on the stator assembly, The terminal passes through the insulating cover plate; an external plug is fixed on the outer cover shell, and the external plug is connected to the terminal; an elastic ring is arranged between the central cylinder and the outer shell, and the elastic ring is sleeved on the central cylinder and squeezed between the central cylinder and the outer shell; a central cylinder accommodating hole is arranged on the central cylinder for convenient terminal passage, a terminal accommodating hole corresponding to the central cylinder accommodating hole is opened on the elastic ring, and a terminal sealing sleeve is mounted on the terminal, and the terminal sealing sleeve is located in the terminal accommodating hole and is sealed with the central cylinder accommodating hole.

[0008] As a preferred solution, the stator assembly includes a stator core, a rear insulator and a front insulator, the rear insulator has three hooks evenly distributed on the circumference of the outer edge, and the outer edge of the insulating cover is provided with a snap-fitting protrusion that fits with the hooks.

[0009] As a preferred solution, the central cylinder accommodating hole is provided with a guiding inclined surface that cooperates with the terminal sealing sleeve.

[0010] As a preferred solution, the terminal sealing sleeve includes a first sealing sleeve part and a second sealing sleeve part, the first sealing sleeve part is conical, the first sealing sleeve part is provided with a first through hole for convenient passage of the terminal, the second sealing sleeve part is provided with a second through hole corresponding to the bent part of the terminal, a positioning and mounting structure is provided between the first sealing sleeve part and the second sealing sleeve part, and the cross-section of the second sealing sleeve part is larger than the central cylinder accommodating hole and is in contact with the outer end surface of the central cylinder accommodating hole.

[0011] As a preferred solution, the terminal sealing sleeve is a long rectangular structure, provided with a through hole for convenient terminal passage and a recessed groove corresponding to the bent portion of the terminal, and one end of the terminal sealing sleeve is arranged as a conical portion that seals with the central cylinder accommodating hole.

[0012] As a preferred solution, an elastic outer ring is squeezed between the insulating cover plate and the outer shell, the size of the elastic outer ring is larger than the elastic ring, and a circular protrusion is provided on the elastic outer ring.

[0013] As a preferred solution, an elastic outer ring is squeezed between the insulating cover plate and the outer shell. The size of the elastic outer ring is larger than the elastic ring. A spherical crown protrusion with a spherical end face is provided on the elastic outer ring.

[0014] As a preferred solution, an elastic outer ring is squeezed between the insulating cover and the outer shell, the elastic outer ring is connected to the elastic ring as a whole, a ring protrusion is provided on the elastic outer ring, and the elastic outer ring and the elastic ring are embedded and fixed in the outer shell.

[0015] As a preferred solution, an anti-twist guard wing is provided on the edge of the terminal accommodating hole on the elastic ring, and a matching concave surface adapted to the anti-twist guard wing is provided on the outer periphery of the central cylinder, and the anti-twist guard wing fits on the matching concave surface.

[0016] As a preferred solution, the elastic ring is further provided with a circle of sealing protrusions which seal with the insulating cover plate.

[0017] After adopting the above technical scheme, the effect of the utility model is as follows: since the blowing device includes a motor, the motor includes an outer shell and an outer cover shell fixed to each other, an installation chamber is formed between the outer shell and the outer cover shell, a central cylinder is installed in the middle of the outer shell, a stator assembly and a rotor assembly are installed on the central cylinder, and the stator assembly and the rotor assembly are located in the installation chamber; a fan is fixedly installed on the rotating shaft of the rotor assembly; an insulating cover plate covering the end of the stator assembly is installed at one end of the stator assembly, and a terminal electrically connected to the wiring harness is arranged on the stator assembly, and the terminal passes through the insulating cover plate; an external plug is fixed on the outer cover shell, and the external plug is connected to the terminal, an elastic ring is arranged between the central cylinder and the outer shell, the elastic ring is sleeved on the central cylinder and squeezed between the central cylinder and the outer shell; a central cylinder accommodating hole for convenient terminal penetration is arranged on the central cylinder, and a terminal accommodating hole corresponding to the central cylinder accommodating hole is opened on the elastic ring The terminal is provided with a terminal sealing sleeve, which is located in the terminal accommodating hole and is sealed with the central cylinder accommodating hole. During assembly, after the insulating end cover is installed at one end of the stator assembly, the terminal sealing sleeve is installed on each terminal on the stator assembly, and then the elastic ring is sleeved on the central cylinder, and then the central cylinder is inserted into the outer shell from the rear side of the outer shell, the elastic ring is squeezed between the central cylinder and the outer shell, and then the stator assembly is inserted into the outer shell by aligning the central cylinder accommodating hole. At the same time, the terminal sealing sleeve is contacted with the central cylinder accommodating hole to complete the sealing. The elastic ring is between the central cylinder and the outer shell, which can effectively reduce the vibration generated by the central cylinder and transmitted to the outer shell, thereby improving stability and reducing the noise caused by vibration of the device. When installing the stator assembly, the air blowing device does not need to ensure the accurate position of the terminal. The terminal sealing sleeves are sleeved on the terminals one by one, which is very convenient to install, avoiding the difficulty of assembly caused by terminal deformation, simplifying the installation difficulty of the blower, and improving installation efficiency.

[0018] Furthermore, since the stator assembly includes a stator core, a rear insulator and a front insulator, the rear insulator is evenly distributed with three hooks on the circumference of the outer edge, and the outer edge of the insulating cover is provided with a clamping protrusion that is clamped with the hooks; wherein the stator core is fixed by stacking a plurality of silicon steel sheets, the rear insulator and the front insulator are fixed at both ends of the stator core, and the hooks on the rear insulator are arranged on the outer edge for easy manufacturing and will not affect the structural arrangement in the middle of the stator, and then cooperate with the clamping protrusion on the outer edge of the insulating cover, so that the installation is quick.

[0019] Furthermore, since the central cylinder accommodating hole is provided with a guiding inclined surface that cooperates with the terminal sealing sleeve, when installing the stator, it can effectively guide the terminal to pass through the central cylinder accommodating hole, and it is also convenient for the terminal sealing sleeve to be more smoothly inserted into the central cylinder accommodating hole and squeeze the contact seal between the guiding inclined surface, which not only improves the sealing effect but also makes assembly simpler.

[0020] Furthermore, since the terminal sealing sleeve includes a first sealing sleeve part and a second sealing sleeve part, the first sealing sleeve part is conical, the first sealing sleeve part is provided with a first through hole for the terminal to pass through, the second sealing sleeve part is provided with a second through hole corresponding to the bent part of the terminal, a positioning and mounting structure is provided between the first sealing sleeve part and the second sealing sleeve part, the cross-section of the second sealing sleeve part is larger than the central cylinder accommodating hole and is in contact with the outer end surface of the central cylinder accommodating hole; the bent part of the terminal can facilitate the winding and welding of the wire harness, and the second through hole of the second sealing sleeve part can make it possible to cover the bent part for effective protection, and the first sealing sleeve part and the second sealing sleeve part are provided with a positioning and mounting structure for convenient cooperation, and the second sealing sleeve part can also effectively block the central cylinder accommodating hole, and the first sealing sleeve part is conical, which is convenient for sealing cooperation with the guide bevel.

[0021] Furthermore, since the terminal sealing sleeve is a long rectangular structure, the terminal sealing sleeve is provided with a through hole for convenient terminal passage and a recessed groove corresponding to the bent portion of the terminal, and one end of the terminal sealing sleeve is arranged as a conical portion that seals and cooperates with the central cylinder accommodating hole; the terminal sealing sleeve is directly sleeved on the terminal, the through hole facilitates the terminal to pass through, the recessed groove is sleeved on the bent portion for effective protection, and then the stator assembly is installed, the terminal sealing sleeve effectively blocks the central cylinder accommodating hole, and the cone and the guide slope can effectively seal and cooperate.

[0022] Since an elastic outer ring is squeezed between the insulating cover plate and the outer shell, the size of the elastic outer ring is larger than the elastic ring, and a ring protrusion is provided on the elastic outer ring; by adding the elastic outer ring, the vibration reduction effect and sealing effect between the insulating cover plate and the outer shell are improved.

[0023] Furthermore, since an elastic outer ring is squeezed between the insulating cover plate and the outer shell, the elastic outer ring is connected to the elastic ring as a whole, a ring protrusion is provided on the elastic outer ring, and the elastic outer ring and the elastic ring are embedded and fixed in the outer shell; in this way, the elastic outer ring and the elastic ring can be fixed to the outer shell as a whole without rotation, and can be installed from the same direction, reducing the tediousness of separate installation, and effectively improving the sealing and vibration reduction effects between the insulating cover plate and the outer shell.

[0024] Furthermore, since an anti-twist guard wing is arranged on the edge of the terminal accommodating hole on the elastic ring, a matching concave surface adapted to the anti-twist guard wing is arranged on the outer periphery of the central cylinder, and the anti-twist guard wing is fitted on the matching concave surface, the anti-twist guard wing and the matching concave surface can cooperate to limit the position of the central cylinder, prevent the central cylinder from twisting, and improve the use effect.

[0025] Furthermore, since the elastic circular ring is also provided with a circle of sealing protrusions which are sealed with the insulating cover plate, the sealing effect of the outer shell and the insulating end cover is further improved, and the sealing performance is improved while reducing vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 It is a stereogram of an embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the external connector of the embodiment of the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the terminal and the terminal sealing sleeve of the embodiment of the utility model;

[0030] Figure 4 This is a front view of the insulating cover plate and the central cylinder of the embodiment of the utility model;

[0031] Figure 5 yes Figure 4 Section view at AA;

[0032] Figure 6 This is a schematic diagram of the structure of the elastic ring of the embodiment of the utility model;

[0033] Figure 7 This is another solution of the elastic ring in the embodiment of the utility model;

[0034] Figure 8 This is another solution of the terminal sealing sleeve of the embodiment of the utility model;

[0035] Fig. 9 It is a half-section view of the central cylinder in the embodiment of the utility model;

[0036] Fig.10 This is a schematic diagram of the structure of the insulating cover plate of the utility model embodiment;

[0037] Fig.11 It is a three-dimensional diagram of an elastic outer ring of another structural form in an embodiment of the utility model;

[0038] In the attached drawings: 1. stator; 2. wiring harness; 3. insulating cover; 4. terminal; 5. central cylinder; 6. bending part; 7. external plug; 8. elastic ring; 9. terminal sealing sleeve; 10. terminal receiving hole; 11. central cylinder receiving hole; 12. outer cover; 13. insulating cover receiving hole; 14. outer shell; 15. rotating shaft; 16. rotor cover; 17. hollow hole; 18. flange; 19. cylinder; 20. rotating bearing; 21. permanent magnet; 22. plug; 23. circuit mounting plate; 24. mounting through hole ; 25. connecting circuit; 26. stator core; 27. rear insulator; 28. front insulator; 29. ​​hook; 30. clamping protrusion; 31. annular portion; 32. tooth portion; 33. magnetic pole portion; 34. retaining portion; 35. engaging pin; 36. guiding slope; 37. first sealing sleeve portion; 38. second sealing sleeve portion; 39. mounting protrusion; 40. elastic outer ring; 41. annular protrusion; 42. first through hole; 43. second through hole; 44. anti-twist guard wing; 45. matching concave surface; 46. sealing protrusion; 47. ball crown protrusion. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below through specific embodiments.

[0040] like Figures 1 to 11 As shown, a blower device includes a motor, the motor includes an outer shell 14 and an outer cover shell 12 fixed to each other, an installation chamber is formed between the outer shell 14 and the outer cover shell 12, a central cylinder 5 is installed in the middle of the outer shell 14, a stator 1 assembly and a rotor assembly are installed on the central cylinder 5, and the stator 1 assembly and the rotor assembly are located in the installation chamber; a fan is fixedly installed on the rotating shaft 15 of the rotor assembly; an insulating cover plate 3 covering the end of the stator 1 assembly is installed at one end of the stator 1 assembly, and a terminal 4 electrically connected to the wiring harness 2 is provided on the stator 1 assembly, and the terminal 4 passes through the insulating cover plate 3 An external connector 7 is fixed on the outer cover shell 12, and the external connector 7 is connected to the terminal 4. An elastic ring 8 is arranged between the central cylinder 5 and the outer shell 14, and the elastic ring 8 is sleeved on the central cylinder 5 and squeezed between the central cylinder 5 and the outer shell 14; a central cylinder accommodating hole 11 is arranged on the central cylinder 5 for the terminal 4 to pass through, and a terminal accommodating hole 10 corresponding to the central cylinder accommodating hole 11 is opened on the elastic ring 8, and a terminal sealing sleeve 9 is mounted on the terminal 4, and the terminal sealing sleeve 9 is located in the terminal accommodating hole 10 and is sealed with the central cylinder accommodating hole 11.

[0041] The rotor assembly includes a rotating shaft 15, a rotor cover 16 and a permanent magnet 21. The fan is fixedly mounted on the rotating shaft 15. The rotating shaft 15 is fixedly connected to the rotor cover 16. A hollow hole 17 is provided on the rotor cover 16 to facilitate heat dissipation. The central cylinder 5 includes a flange portion 18 and a cylindrical portion 19. The flange portion 18 is disc-shaped and has three central cylinder accommodating holes 11. The rotating shaft 15 passes through the cylindrical portion 19. A rotating bearing 20 is provided in the cylindrical portion 19. The rotating shaft 15 is inserted into the rotating bearing 20. In this way, a permanent magnet 21 is provided on the inner circumference of the rotor cover 16 to cooperate with the stator 1 assembly. In this way, the rotor cover 16 is driven to rotate by the permanent magnet 21, thereby rotating the rotating shaft 15 and rotating the fan. The fan is not shown in the figure.

[0042] like Figure 2 As shown, the external connector 7 includes a connector 22, which has four pins. The connector 22 is fixedly mounted on a circuit mounting board 23. The circuit mounting board 23 is provided with a mounting through hole 24 for the terminal 4 to pass through. The circuit mounting board 23 is provided with a connecting circuit 25 connected to three pins in the connector 22, and the remaining pin is grounded. The connecting circuit 25 connects the terminals 4 in each mounting through hole 24 with the connector 22. The connector 22 is connected to an external printed circuit board, which avoids the printed circuit board being integrated in the blasting device and improves the waterproof effect. The circuit mounting board 23 is fixedly mounted on the flange portion 18 by screws to ensure a firm installation, and the circuit mounting board 23 is installed in the outer cover shell 12 to effectively protect the interior.

[0043] like Figure 3 , Figure 5 and Fig.10 As shown, the stator 1 assembly includes a stator core 26, a rear insulator 27 and a front insulator 28, and the rear insulator 27 is evenly distributed with three hooks 29 on the outer edge circumference, and the outer edge of the insulating cover plate 3 is provided with a clamping protrusion 30 that is clamped with the hook 29; wherein the stator core 26 is fixed by stacking a plurality of silicon steel sheets, and the rear insulator 27 and the front insulator 28 are fixed at both ends of the stator core 26, and the hook on the rear insulator 27 is arranged on the outer edge for easy manufacturing, and does not affect the structural setting in the middle of the stator 1 assembly, and then cooperates with the clamping protrusion 30 on the outer edge of the insulating cover plate 3, and is quick to install;

[0044] The stator core 26 includes an annular portion 31, a tooth portion 32 and a magnetic pole portion 33. The annular portion 31 is the inner ring portion of the stator core 26, the magnetic pole portion 33 is the outer ring portion of the stator core 26, and the tooth portion 32 is the portion between the inner ring and the outer ring of the stator core 26. The magnetic pole portion 33 corresponds to the permanent magnet 21. The terminal 4 is fixedly mounted on the retaining portion 34 of the rear insulator 27. The retaining portion 34 is provided with a coupling pin 35 inserted into the through groove of the annular portion 31. The hook 29 on the rear insulator 27 is arranged on the outer edge for easy manufacturing and winding of the wiring harness 2, and will not affect the structural setting in the middle of the stator 1. At the same time, there is no need to open a bayonet in the middle of the insulating cover plate 3, which improves the processing efficiency, and then cooperates with the clamping protrusion 30 on the outer edge of the insulating cover plate 3, which is quick to install; the insulating end cover is also provided with an insulating cover plate accommodating hole 13, which is convenient for the corresponding three terminals 4 to pass through and facilitate positioning.

[0045] Furthermore, the central cylinder accommodating hole 11 is provided with a guiding inclined surface 36 which cooperates with the terminal sealing sleeve 9; when installing the central cylinder 5, it is necessary to first clamp the flange portion 18 of the central cylinder 5 on the outer shell 14, and at the same time, an elastic ring 8 is provided between the flange portion 18 and the outer shell 14 to effectively reduce vibration and seal, and then the insulating cover plate 3 needs to be clamped with the rear insulator 27, and the terminal sealing sleeve 9 is put on the terminal 4, and the stator 1 assembly is inserted into the outer shell 14 as a whole, and the installation can be completed by simply aligning the central cylinder accommodating hole 11 and the terminal accommodating hole 10, which not only improves the sealing effect, but also makes the assembly easier.

[0046] like Figure 8 As shown, the terminal sealing sleeve 9 includes a first sealing sleeve portion 37 and a second sealing sleeve portion 38. The first sealing sleeve portion 37 is conical, and is provided with a first through hole 42 for the terminal 4 to pass through. The second sealing sleeve portion 38 is provided with a second through hole 43 corresponding to the bent portion 6 of the terminal 4. A positioning and mounting structure is provided between the first sealing sleeve portion 37 and the second sealing sleeve portion 38. The cross-section of the second sealing sleeve portion 38 is larger than the central cylinder accommodating hole 11 and is in contact with the outer end surface of the central cylinder accommodating hole 11. The positioning and mounting structure The structure includes a positioning and mounting protrusion 39 on the second sealing sleeve portion 38 and a mounting groove on the first sealing sleeve portion 37, so that it is convenient to process separately. The second sealing sleeve portion 38 can also effectively block the central cylinder accommodating hole 11. The first sealing sleeve portion 37 is conical, which is convenient for matching with the guide slope 36. The bent portion 6 of the terminal 4 is convenient for winding and welding with the wire harness 2, so that the wire harness 2 is fixed in the bent portion 6. At this time, the second through hole 43 on the second sealing sleeve portion 38 is needed to cover the bent portion 6 for insulation, and at the same time it can also reduce vibration, thereby improving the sealing and vibration reduction effect during use.

[0047] Another solution can also be adopted, in which the terminal sealing sleeve 9 is a long rectangular structure, and is provided with a through hole for the terminal 4 to pass through and a recessed groove corresponding to the bent portion 6 of the terminal 4. One end of the terminal sealing sleeve 9 is arranged as a conical portion that seals and matches the central cylinder accommodating hole 11; in this way, only one terminal sealing sleeve 9 is needed to fit both the terminal 4 and the bent portion 6, first inserted into the terminal 4 through the through hole, and then the recessed groove is covered on the bent portion 6 of the corresponding terminal 4. At the same time, the taper can improve the convenience of matching and make the matching accurate.

[0048] like Figure 5 and Figure 7 As shown, an elastic outer ring 40 is squeezed between the insulating cover plate 3 and the outer shell 14. The size of the elastic outer ring 40 is larger than the elastic ring 8, and a ring protrusion 41 is provided on the elastic outer ring 40. In order to prevent the outer shell 14 and the insulating cover plate 3 from generating impact vibration during operation, an elastic outer ring 40 is also provided on the outer ring of the elastic ring 8, thereby effectively reducing vibration, and when the elastic outer ring 40 or the elastic ring 8 fails, they can be replaced separately.

[0049] like Fig.11 As shown, the elastic outer ring 40 in this embodiment can be further changed, and a spherical crown protrusion 47 with a spherical end surface is provided on the elastic outer ring 40. The spherical crown protrusion 47 can better contact with the outer shell 14, and the number of the spherical crown protrusions is multiple, which can ensure that all parts can be reliably in contact, thereby providing a better vibration reduction and noise reduction effect.

[0050] Another solution is to Figure 7 As shown, an elastic outer ring 40 is squeezed between the insulating cover plate 3 and the outer shell 14, and the elastic outer ring 40 is connected with the elastic ring 8 as a whole. The elastic outer ring 40 is provided with a ring protrusion 41, and the elastic outer ring 40 and the elastic ring 8 are embedded and fixed in the outer shell 14; since the elastic outer ring 40 and the elastic ring 8 are integrated, they are installed on the outer shell 14 from the opening side of the outer shell 14, integrated with the outer shell, and will not rotate. At the same time, the steps of separately installing the elastic outer ring 40 and the elastic ring 8 are omitted, thereby improving the installation efficiency.

[0051] like Figure 4 and Fig. 9 As shown, an anti-twist guard 44 is provided on the edge of the terminal accommodating hole 10 on the elastic ring 8, and a matching concave surface 45 adapted to the anti-twist guard 44 is provided on the outer periphery of the central cylinder 5, and the anti-twist guard 44 fits on the matching concave surface 45; since the elastic ring 8 needs to be fixed between the central cylinder 5 and the outer shell 14 when installed, ensuring that the terminal accommodating hole 10 on the elastic ring 8 corresponds to the central cylinder accommodating hole 11, the anti-twist guard 44 can ensure that the central cylinder 5 will not twist, thereby improving the stability and reliability of the installation.

[0052] Furthermore, the elastic ring 8 is also provided with a circle of sealing protrusions 46 which are sealed with the insulating cover plate 3; this can further effectively seal between the insulating end cover and the outer shell 14, while also reducing the transmission of vibration and improving practicality.

[0053] When installing the central cylinder 5, first put the elastic ring 8 on the flange portion 18 of the central cylinder 5, and then insert the cylindrical portion 19 into the outer shell 14, so that the outer shell 14 and the flange portion 18 of the central cylinder 5 are sealed and vibration-damped. At the same time, the central cylinder accommodating hole 11 and the terminal accommodating hole 10 correspond, and the elastic outer ring 40 is also installed in the outer shell 14, and then the assembled stator 1 assembly is inserted into the outer shell 14. At this time, the terminals 4 on the stator 1 assembly are all equipped with terminal sealing sleeves 9. Then, you only need to align the terminals 4 with the central cylinder accommodating hole 10 and insert them to complete the installation quickly and smoothly. The terminal sealing sleeve 9 can complete the sealing and vibration reduction with the central cylinder accommodating hole 11, and the insulating cover plate 3 will also be pressed on the annular protrusion 41 of the elastic outer ring 40 to further seal and dampen.

[0054] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solution of the present invention, without departing from the design spirit of the present invention, should fall within the scope of protection defined in the claims of the present invention.

Claims

1. A blower device, comprising a motor, the motor comprising an outer shell and an outer cover shell fixed to each other, an installation chamber formed between the outer shell and the outer cover shell, a central cylinder installed in the middle of the outer shell, a stator assembly and a rotor assembly installed on the central cylinder, the stator assembly and the rotor assembly are located in the installation chamber; a fan is fixedly installed on the rotating shaft of the rotor assembly; an insulating cover plate covering the end of the stator assembly is installed at one end of the stator assembly, a terminal electrically connected to a wiring harness is provided on the stator assembly, and the terminal passes through the insulating cover plate; characterized in that: An external connector is fixed on the outer cover shell, and the external connector is connected to the terminal. An elastic ring is arranged between the central cylinder and the outer shell, and the elastic ring is sleeved on the central cylinder and squeezed between the central cylinder and the outer shell. The central cylinder is provided with a central cylinder accommodating hole for convenient terminal penetration, and the elastic ring is provided with a terminal accommodating hole corresponding to the central cylinder accommodating hole. A terminal sealing sleeve is sleeved on the terminal, and the terminal sealing sleeve is located in the terminal accommodating hole and is sealed with the central cylinder accommodating hole.

2. A blasting device as claimed in claim 1, characterized in that: The stator assembly comprises a stator core, a rear insulator and a front insulator. The rear insulator is provided with three hooks evenly distributed on the circumference of the outer edge. The outer edge of the insulating cover plate is provided with a clamping protrusion that is clamped with the hooks.

3. A blasting device as claimed in claim 2, characterized in that: The central cylinder accommodating hole is provided with a guiding inclined surface matched with the terminal sealing sleeve.

4. A blasting device as claimed in claim 1, characterized in that: The terminal sealing sleeve includes a first sealing sleeve part and a second sealing sleeve part, the first sealing sleeve part is conical, the first sealing sleeve part is provided with a first through hole for the terminal to pass through, the second sealing sleeve part is provided with a second through hole corresponding to the bent part of the terminal, a positioning and mounting structure is provided between the first sealing sleeve part and the second sealing sleeve part, the cross-section of the second sealing sleeve part is larger than the central cylinder accommodating hole and is in contact with the outer end surface of the central cylinder accommodating hole.

5. A blowing device as claimed in claim 1, characterized in that: The terminal sealing sleeve is a long rectangular structure, and is provided with a through hole for convenient terminal passage and a recessed groove corresponding to the bent portion of the terminal. One end of the terminal sealing sleeve is configured as a tapered portion that seals with the central cylinder receiving hole.

6. A blowing device as claimed in claim 4 or 5, characterized in that: An elastic outer ring is squeezed between the insulating cover plate and the outer shell. The size of the elastic outer ring is larger than the elastic ring. A ring protrusion is provided on the elastic outer ring.

7. A blowing device as claimed in claim 4 or 5, characterized in that: An elastic outer ring is squeezed between the insulating cover plate and the outer shell. The size of the elastic outer ring is larger than that of the elastic ring. A spherical crown protrusion with a spherical end surface is provided on the elastic outer ring.

8. A blowing device as claimed in claim 4 or 5, characterized in that: An elastic outer ring is squeezed between the insulating cover plate and the outer shell. The elastic outer ring is connected with the elastic ring as a whole. A ring protrusion is provided on the elastic outer ring. The elastic outer ring and the elastic ring are embedded and fixed in the outer shell.

9. A blasting device as claimed in claim 1, characterized in that: The elastic ring is provided with anti-twist wings on the edge of the terminal accommodating hole, and the outer periphery of the central cylinder is provided with a matching concave surface adapted to the anti-twist wings, and the anti-twist wings are attached to the matching concave surface.

10. A blowing device as claimed in claim 1, characterized in that: The elastic ring is also provided with a circle of sealing protrusions which are sealed with the insulating cover plate.

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