Brushless blower structure

Abstract

The utility model relates to the technical field of air blowers, in particular to a brushless air blower structure which comprises a volute, a volute cover, a screw and a brushless motor. The volute cover covers the top end of the volute, and a connecting shell which extends towards the inner side of the volute and is connected with the inner wall of the volute in an attached mode is arranged at the position, located at the edge, of the bottom end of the volute cover. The multiple screws are arranged on the outer side of the volute and penetrate through the volute to be connected with the connecting shell. The brushless motor is installed at the bottom end of the volute, and an output shaft of the brushless motor extends to the inner side of the volute. When the volute is covered with the volute cover, the volute cover drives the connecting shell to be connected to the inner side of the volute in an inserted mode, the outer side wall of the connecting shell is connected with the inner side wall of the volute in an attached mode, meanwhile, the screw penetrates through the volute from the outer side of the volute to be in threaded connection with the connecting shell, and the connecting shell is fixed to the inner side of the volute through the screw. The volute and the volute cover are connected stably, and the sealing performance is high.

Description

Technical Field

[0001] This utility model relates to the field of blower technology, specifically to a brushless blower structure. Background Technology

[0002] A brushless blower is a type of fan driven by a brushless DC motor, whose impeller design enables it to provide stable and efficient airflow.

[0003] Chinese patent document CN215370278U discloses a brushless blower. It features a volute with a receiving groove on its top surface, a volute cover fitted to the bottom of the volute and forming an internal cavity, a rotatable impeller within the cavity, and a motor fixedly mounted within the receiving groove. The motor houses a rotating shaft that extends into the cavity and connects to the impeller. The external motor design reduces friction between the shaft and internal components of the volute, while also achieving a compact, space-saving structure. Furthermore, the recessed design between the shaft and the bearing structure within the motor further reduces the contact area, preventing deformation of the bearing's inner bore due to pressure on the bearing's outer circumference. This reduces noise while maintaining the shaft's rotational speed and ensuring strong airflow.

[0004] However, in the above scheme, the fastening structure between the volute and the volute cover is located on the outside. During use, the fastening structure is easily damaged by external influences, causing the fastening to loosen and affecting the overall sealing performance. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a brushless blower structure.

[0006] The technical solution of this utility model is: a brushless blower structure, including a volute, a volute cover, a screw, and a brushless motor;

[0007] The volute cover fits over the top of the volute shell, and the bottom end of the volute cover, located at the edge, has a connecting shell that extends into the volute shell and fits against the inner wall of the volute shell.

[0008] There are multiple screws, all of which are located on the outside of the volute and penetrate through the volute to connect with the connecting shell;

[0009] The brushless motor is mounted at the bottom of the volute and the output shaft extends to the inside of the volute. An impeller is provided on the output shaft of the brushless motor and located inside the volute to generate negative pressure to the inside of the volute during use.

[0010] Preferably, the bottom end of the volute is provided with a mounting shell, the end of which extends to the inside of the volute. The brushless motor is mounted in the middle of the inside of the mounting shell, and the output shaft extends through the mounting shell to the inside of the volute.

[0011] Preferably, the impeller includes bolts, a first blade, a protrusion, and a mounting plate;

[0012] The mounting plate is fitted onto the output shaft of the brushless motor;

[0013] The protrusion is installed on the middle side of the mounting plate and sleeved on the end of the output shaft of the brushless motor;

[0014] The bolt is located in the middle of the side of the protrusion and passes through the protrusion to connect with the output shaft of the brushless motor via a thread.

[0015] The number of first blades is multiple, and the multiple first blades are installed at equal angles on the side of the protrusion and located on one side of the volute.

[0016] Preferably, a slot is provided on the other side of the protrusion, and when the protrusion is installed in conjunction with the output shaft of the brushless motor, the output shaft of the brushless motor is accommodated in the slot.

[0017] Preferably, the outer wall of the mounting shell and the inner wall of the volute shell enclose a cavity.

[0018] Preferably, multiple ventilation holes are provided on the inner side of the mounting housing and on the side of the brushless motor.

[0019] Preferably, a plurality of second blades are provided on the other side of the mounting plate and in the chamber, and the plurality of second blades are arranged at equal angles around the center of the mounting plate.

[0020] Preferably, the end of the mounting housing extends towards the bottom of the volute, and the inner depth of the mounting housing is greater than the length of the brushless motor.

[0021] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0022] When the volute cover closes onto the volute housing, the volute cover drives the connecting shell to insert into the inner side of the volute housing, and the outer side wall of the connecting shell fits and connects with the inner side wall of the volute housing. At the same time, the screw passes through the volute housing and is threadedly connected to the connecting shell on the outer side of the volute housing, so that the screw fixes the connecting shell to the inner side of the volute housing, making the connection between the volute housing and the volute cover more stable and with higher sealing performance. Attached Figure Description

[0023] Figure 1-2 All of these are perspective views of one embodiment of the present utility model.

[0024] Figure 3 This is an exploded cross-sectional view of the volute structure in one embodiment of the present invention.

[0025] Reference numerals: 1. Volute; 2. Volute cover; 3. Screw; 4. Brushless motor; 5. Mounting housing; 6. Ventilation hole; 7. Bolt; 8. Connecting housing; 9. First blade; 10. Protrusion; 11. Chamber; 12. Slot; 13. Mounting plate; 14. Second blade. Detailed Implementation

[0026] Example 1

[0027] like Figure 1-3 As shown, the present invention proposes a brushless blower structure, which includes a volute 1, a volute cover 2, a screw 3, and a brushless motor 4;

[0028] The volute cover 2 is fitted onto the top of the volute shell 1. The bottom end of the volute cover 2 and the edge of the volute cover 2 are provided with a connecting shell 8 that extends into the inside of the volute shell 1 and is fitted to the inner wall of the volute shell 1. The connecting shell 8 is used to fix the volute cover 2 to the top of the volute shell 1 by friction between the connecting shell 8 and the volute shell 1. In use, a sealing gasket can be provided on the outside of the connecting shell 8 to further improve the sealing performance of the connection between the volute cover 2 and the volute shell 1.

[0029] There are multiple screws 3, all of which are located on the outside of the volute 1 and pass through the volute 1 to connect with the connecting shell 8. The screws 3 are used to further fix the connecting shell 8 on the inside of the volute 1 to prevent the connecting shell 8 from falling off.

[0030] The brushless motor 4 is mounted at the bottom of the volute 1 and its output shaft extends to the inside of the volute 1. An impeller is provided on the output shaft of the brushless motor 4 and inside the volute 1 to generate negative pressure inside the volute 1 during use.

[0031] In an optional embodiment, a mounting shell 5 is provided at the bottom of the volute 1, and the end of the mounting shell 5 extends to the inner side of the volute 1. The brushless motor 4 is mounted in the middle of the inner side of the mounting shell 5 and the output shaft extends through the mounting shell 5 to the inner side of the volute 1, so that the output shaft of the brushless motor 4 is located inside the volute 1, so that the brushless motor 4 is directly connected to the impeller, and the impeller is installed smoothly.

[0032] In an optional embodiment, the end of the mounting shell 5 extends toward the bottom of the volute 1, the inner depth of the mounting shell 5 is greater than the length of the brushless motor 4, and a protective net can be provided on the inner side of the end to protect the brushless motor 4 through the mounting shell 5 during use and reduce the damage to the brushless motor 4 caused by external forces.

[0033] In this embodiment, the brushless motor 4 is fixed inside the mounting housing 5, and the output shaft of the brushless motor 4 is inserted into the volute 1, so that the impeller is directly installed inside the volute 1. The volute cover 2 is then placed over the volute 1, so that the volute cover 2 inserts the connecting housing 8 inside the volute 1. The screw 3 is threaded through the volute 1 and connected to the connecting housing 8 on the outside of the volute 1. The screw 3 and the connecting housing 8 work together to fix the volute cover 2 onto the volute 1, and the connection between the volute 1 and the volute cover 2 has a high sealing performance.

[0034] Example 2

[0035] like Figure 2-3 As shown, the present invention proposes a brushless blower structure. Compared with the first embodiment, the difference in this embodiment is that the impeller includes a bolt 7, a first blade 9, a protrusion 10, and a mounting plate 13.

[0036] Mounting plate 13 is sleeved on the output shaft of brushless motor 4, wherein there is a gap between mounting plate 13 and the end of mounting shell 5;

[0037] The protrusion 10 is installed on the middle of the side of the mounting plate 13 and sleeved on the end of the output shaft of the brushless motor 4;

[0038] Bolt 7 is located in the middle of the side of protrusion 10 and passes through protrusion 10 to be threadedly connected to the output shaft of brushless motor 4;

[0039] There are multiple first blades 9, which are installed at equal angles on the side of the protrusion 10 and on one side of the volute cover 2. When the protrusion 10 moves the first blades 9, the first blades 9 deliver the air inside the volute 1 to the air outlet formed by the connection between the volute 1 and the volute cover 2, and make the volute 1 and the volute cover 2 support a negative pressure. At the same time, through the through hole in the middle of the volute cover 2, the air outside is delivered to the volute 1 by the negative pressure, so that the first blades 9 continuously deliver air force to the air outlet.

[0040] In an optional embodiment, a slot 12 is provided on the other side of the protrusion 10. When the protrusion 10 is installed in conjunction with the output shaft of the brushless motor 4, the output shaft of the brushless motor 4 is accommodated in the slot 12, so that the slot 12 is engaged with the keyway of the output shaft of the brushless motor 4, so that the output shaft of the brushless motor 4 has an interaction force with the inner wall of the slot 12, and the protrusion 10 is rotated by the interaction force.

[0041] In this embodiment, by setting a slot 12 on the other side of the protrusion 10 and connecting the slot 12 with the end of the output shaft of the brushless motor 4, the output shaft of the brushless motor 4 is tightly fitted with the slot 12, so that the brushless motor 4 drives the protrusion 10 to rotate smoothly in the volute 1, and the protrusion 10 drives the first blade 9 to move, so that the first blade 9 generates negative pressure on the inside of the volute 1, and delivers the outside air into the volute 1 through the through hole in the middle of the volute cover 2, and delivers the air into the volute 1 through the volute cover 2 to the air outlet formed by the connection between the side of the volute 1 and the volute cover 2.

[0042] Example 3

[0043] like Figure 3 As shown, the present invention proposes a brushless blower structure. Compared with Embodiment 1, the difference in this embodiment is that the outer side wall of the end of the mounting shell 5 is located inside the volute 1 and forms a chamber 11 by enclosing the inner side wall of the volute 1.

[0044] In an optional embodiment, a plurality of ventilation holes 6 are provided on the inner side of the mounting housing 5 and on the side of the brushless motor 4, for allowing external air to be delivered to the volute 1 through the inner side of the mounting housing 5, thereby increasing the air intake volume inside the volute 1.

[0045] In an optional embodiment, a plurality of second blades 14 are provided on the other side of the mounting plate 13 and in the chamber 11. The plurality of second blades 14 are arranged at equal angles around the center of the mounting plate 13 to generate negative pressure in the chamber 11 during use.

[0046] In this embodiment, a cavity 11 is formed by the volute 1 and the mounting shell 5. Multiple second blades 14 are installed on the other side of the mounting plate 13 in the cavity 11. When the protrusion 10 moves the first blade 9, the protrusion 10 moves the second blades 14 synchronously. The second blades 14 generate negative pressure in the cavity 11. Through the action of negative pressure, the outside air is delivered to the volute 1 through the ventilation hole 6 and synchronously delivered to the air outlet formed by the connection between the volute 1 and the volute cover 2, which improves the air delivery efficiency.

[0047] In this invention, the brushless motor 4 is fixed inside the mounting housing 5, and its output shaft is inserted into the volute 1. Simultaneously, the mounting plate 13 is fitted onto the output shaft of the brushless motor 4, and the output shaft is inserted into the slot 12 for a secure connection. The volute cover 2 is then placed over the volute 1, allowing the connecting housing 8 to be inserted into the inner side of the volute 1, and ensuring the outer wall of the connecting housing 8 is flush with the inner wall of the volute 1, thus improving the sealing of the connection between the volute 1 and the volute cover 2. A screw 3 is threaded through the volute 1 and onto the connecting housing 8 from the outside, securing the volute cover 2 to the volute 1 and ensuring a stable connection. The brushless motor 4 then drives the drive protrusion 10 to rotate, causing the protrusion 10 to rotate the first blade 9. As the first blade 9 moves, it transports the air inside the volute 1 to the air outlet formed by the connection between the volute 1 and the volute cover 2, thereby creating a negative pressure between the volute 1 and the volute cover 2. Under the action of the negative pressure, the air outside is transported into the volute 1 through the through hole in the middle of the volute cover 2. The movement of the first blade 9 continuously transports the air to the air outlet. At the same time as the protrusion 10 drives the first blade 9 to move, the protrusion 10 drives the second blade 14 to move synchronously, so that the air in the chamber 11 of the second blade 14 is transported to the air outlet, and a negative pressure is created in the chamber 11. At the same time, through the action of the negative pressure, the outside air is transported into the volute 1 through the ventilation hole 6, and is transported synchronously with the first blade 9 to the air outlet formed by the connection between the volute 1 and the volute cover 2, thereby improving the air transport efficiency.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A brushless blower structure, characterized in that, It includes a volute (1), a volute cover (2), screws (3), and a brushless motor (4); The volute cover (2) is fitted onto the top of the volute shell (1), and the bottom end of the volute cover (2) and the edge are provided with a connecting shell (8) that extends into the volute shell (1) and is fitted to the inner wall of the volute shell (1). There are multiple screws (3), and all screws (3) are located on the outside of the volute (1) and pass through the volute (1) to connect with the connecting shell (8); The brushless motor (4) is mounted at the bottom of the volute (1) and its output shaft extends to the inside of the volute (1). An impeller is provided on the output shaft of the brushless motor (4) and on the inside of the volute (1) for generating negative pressure on the inside of the volute (1) during use.

2. The brushless blower structure according to claim 1, characterized in that, The bottom end of the volute (1) is provided with a mounting shell (5), the end of the mounting shell (5) extends to the inside of the volute (1), the brushless motor (4) is installed in the middle of the inside of the mounting shell (5) and the output shaft extends through the mounting shell (5) to the inside of the volute (1).

3. The brushless blower structure according to claim 1, characterized in that, The impeller includes a bolt (7), a first blade (9), a protrusion (10), and a mounting plate (13); The mounting plate (13) is fitted onto the output shaft of the brushless motor (4); The protrusion (10) is installed on the middle of the side of the mounting plate (13) and sleeved on the end of the output shaft of the brushless motor (4); Bolt (7) is located in the middle of the side of the protrusion (10) and passes through the protrusion (10) to be threadedly connected to the output shaft of the brushless motor (4); The number of first blades (9) is multiple, and the multiple first blades (9) are installed at equal angles on the side of the protrusion (10) and on one side of the volute (2).

4. The brushless blower structure according to claim 3, characterized in that, A slot (12) is provided on the other side of the protrusion (10). When the protrusion (10) and the output shaft of the brushless motor (4) are installed together, the output shaft of the brushless motor (4) is accommodated in the slot (12).

5. The brushless blower structure according to claim 2, characterized in that, The outer wall of the mounting shell (5) and the inner wall of the volute (1) form a chamber (11).

6. The brushless blower structure according to claim 2, characterized in that, Multiple ventilation holes (6) are provided on the inner side of the mounting housing (5) and on the side of the brushless motor (4).

7. The brushless blower structure according to claim 5, characterized in that, On the other side of the mounting plate (13) and in the chamber (11), there are a plurality of second blades (14), which are arranged at equal angles around the center of the mounting plate (13).

8. The brushless blower structure according to claim 2, characterized in that, The end of the mounting housing (5) extends toward the bottom of the volute (1), and the inner depth of the mounting housing (5) is greater than the length of the brushless motor (4).

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