Motor mounting structure of cross-flow fan

Abstract

The utility model provides a motor mounting structure of a cross-flow fan, and belongs to the technical field of cross-flow fans. The cross-flow fan solves the problem that an existing cross-flow fan is poor in stability. The cross-flow fan comprises a fan cover, an impeller located in the fan cover and a side plate fixedly connected to the side portion of the fan cover, a motor comprises a front end cover and an output shaft, a mounting structure comprises a connecting plate, an annular positioning part extending outwards on the front end cover and a positioning hole located in the side plate, and the motor is fixedly connected with the side plate through the connecting plate. The positioning part penetrates through the positioning hole, the peripheral wall of the positioning part abuts against the hole wall of the positioning hole, the output shaft penetrates through the positioning part to be connected with the impeller, and the central axis of the output shaft, the central axis of the positioning part and the central axis of the positioning hole coincide. The motor mounting structure of the cross-flow fan has the advantages that the stability of the cross-flow fan is improved, and the service life of the cross-flow fan is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of cross-flow fan technology and relates to a motor mounting structure for a cross-flow fan. Background Technology

[0002] A cross-flow fan is a special type of centrifugal fan. This type of fan can generate high static pressure and large air volume, while having relatively low noise, making it suitable for applications that require uniform airflow distribution.

[0003] Existing cross-flow fans, such as the novel motor structure disclosed in Chinese patent literature [Patent No.: 202121669826.9; Application Publication No.: CN215934660U], have motors fixed to the fan side plates via connecting plates. The motor includes a stator core, a stator magnetic core fixed on the stator core, and a rotor rotatably connected thereto. The rotor is connected to the motor shaft, and the motor shaft is fixed to one end of the fan impeller. Several heat dissipation blades are respectively arranged on the front and rear end rings of the rotor. A frame is arranged around the stator magnetic core, and windings are wound on the frame. A sealing shell is fastened to the outside of the frame, and glue is injected into the sealing shell.

[0004] This type of cross-flow fan features a motor front cover on a connecting plate. The motor front cover has two fixing posts, and the motor is fixed to the connecting plate with bolts. The connecting plate also has several symmetrical fixing holes, and the side plate has several through holes corresponding to these fixing holes. After the connecting plate is rotated into position, the fixing holes and connecting holes are aligned. Bolts are then passed through the fixing holes and through holes and tightened to fix the connecting plate to the side plate, thus securing the motor to the fan side plate and fixing the motor shaft to one end of the fan impeller. While this type of cross-flow fan uses bolts to fix the connecting plate and side plate for motor positioning, a certain degree of deviation between the motor shaft and the central axis of the fan impeller during installation can cause vibration and torsion issues, resulting in poor stability and reduced service life. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a motor mounting structure for a cross-flow fan, thereby solving the technical problem of how to improve the stability and service life of the cross-flow fan.

[0006] The objective of this utility model can be achieved through the following technical solution: a motor mounting structure for a cross-flow fan, the cross-flow fan including a shroud, an impeller located in the shroud, and a side plate fixed to the side of the shroud, the motor including a front end cover and an output shaft, characterized in that the mounting structure includes a connecting plate, an outwardly extending and annular positioning part on the front end cover and a positioning hole located in the side plate, the motor being fixedly connected to the side plate through the connecting plate, the positioning part passing through the positioning hole and the outer peripheral wall of the positioning part abutting against the hole wall of the positioning hole, the output shaft passing through the positioning part and connected to the impeller, the central axes of the output shaft, the positioning part and the positioning hole coinciding.

[0007] The fan cover, impeller, and side plate are assembled into a single unit, as are the connecting plate and motor. The positions of all components within these two units are highly precise. A positioning part is installed on the front cover, with its outer peripheral wall abutting against the wall of the positioning hole. This ensures that the central axes of the output shaft, the positioning part, and the positioning hole coincide. The connecting plate is then fixed to the side plate, achieving motor positioning. This avoids positional deviations caused by bolt fastening, preventing vibration and torsion issues during operation of the cross-flow fan, thereby improving its stability and extending its service life.

[0008] In the motor mounting structure of the aforementioned cross-flow fan, the outer peripheral wall of the positioning part has a first positioning surface arranged at an inclination, and the wall of the positioning hole has a second positioning surface arranged at an inclination. Both the first and second positioning surfaces are inclined outwards along the direction from the impeller toward the motor, and the first positioning surface can abut against the second positioning surface. When the operator holds the motor for installation, when the first and second positioning surfaces are in contact, the operator can feel that the motor is installed in place. At this time, the central axis of the output shaft, the positioning part, and the positioning hole coincides. Subsequently, the connecting plate can be fixed to the side plate to achieve motor positioning, avoid vibration and torsion problems during cross-flow fan operation, thereby improving the stability of the cross-flow fan and extending its service life.

[0009] In the motor mounting structure of the aforementioned cross-flow fan, the first positioning surface is located near the outer end of the positioning part. This structure results in a shorter distance for the positioning part to extend into the fan shroud, ensuring that the installation of the positioning part does not affect the installation of the impeller, demonstrating a reasonable design.

[0010] In the motor mounting structure of the aforementioned cross-flow fan, a plurality of buffer holes are provided in the side plate. These buffer holes are evenly spaced around the positioning holes and are connected to them. The buffer holes serve a buffering function, reducing vibration of the positioning part and allowing the outer peripheral wall of the positioning part to better abut against the wall of the positioning hole.

[0011] In the aforementioned motor mounting structure of a cross-flow fan, the connecting plate has a through hole, the positioning part passes through the through hole, and there is a certain distance between the outer peripheral wall of the positioning part and the wall of the through hole. This structure avoids contact between the connecting plate and the positioning part, prevents the connecting plate from negatively affecting the motor mounting position, improves the motor mounting accuracy, avoids vibration and torsion problems during cross-flow fan operation, improves the stability of the cross-flow fan, and extends the service life of the cross-flow fan.

[0012] In the motor mounting structure of the aforementioned cross-flow fan, the side plate is further provided with a plurality of snap-fit ​​holes spaced apart, the snap-fit ​​holes surrounding the positioning holes. The connecting plate is provided with a plurality of snap-fit ​​tabs spaced apart, the snap-fit ​​tabs passing through the snap-fit ​​holes and the connecting plate being rotated to snap the connecting plate and the side plate together. This structure facilitates the positioning and fastening of the connecting plate and the side plate.

[0013] In the motor mounting structure of the aforementioned cross-flow fan, the front end cover also has a protruding lug. A first fastener passes through the lug, the connecting plate, and the side plate, allowing the motor to be securely connected to the side plate via the connecting plate. This structure facilitates the secure connection of the motor, the connecting plate, and the side plate.

[0014] In the motor mounting structure of the aforementioned cross-flow fan, the motor further includes a rear end cover and a stator. The stator is located between the front end cover and the rear end cover. The motor is fixedly connected to the connecting plate by a second fastener passing through the connecting plate, the front end cover, the stator, and the rear end cover. This structure facilitates the connection between the motor and the connecting plate.

[0015] Compared with the prior art, the motor mounting structure of the cross-flow fan provided by this utility model has the following advantages:

[0016] 1. This cross-flow fan uses a first positioning surface on the positioning part to abut against the second positioning surface in the positioning hole of the side plate, so that the central axis of the output shaft, the positioning part and the positioning hole coincide, achieving precise positioning of the motor, avoiding vibration and torsion problems during operation of the cross-flow fan, thereby improving the stability of the cross-flow fan and extending its service life.

[0017] 2. When assembling this crossflow fan, the fan cover, impeller, and side plate are assembled into a whole, and the motor and connecting plate are assembled into a whole. The positions of each component within the two wholes are very precise. Then, the connecting plate is fixed to the side plate, which can improve the installation accuracy of the motor, avoid vibration and torsion problems during the operation of the crossflow fan, thereby improving the stability of the crossflow fan and extending its service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this cross-flow fan.

[0019] Figure 2 This is a sectional view of the motor mounting structure.

[0020] Figure 3 This is a schematic diagram showing the position of the positioning part relative to the side plate and the connecting plate.

[0021] Figure 4 This is an exploded view of the motor, connecting plate, and side plate.

[0022] In the diagram, 1. Fan cover; 2. Impeller; 3. Side plate; 4. Motor; 41. Front cover; 42. Output shaft; 43. Positioning part; 44. Lug; 45. Rear cover; 46. Stator; 5. Connecting plate; 6. Positioning hole; 7. First positioning surface; 8. Second positioning surface; 9. Buffer hole; 10. Through hole; 11. Snap-fit ​​hole; 12. Snap-fit ​​piece; 13. First fastener; 14. Second fastener. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figure 1 , Figure 2 As shown, the cross-flow fan includes a shroud 1, an impeller 2, a side plate 3, and a motor 4. The impeller 2 is located in the shroud 1, the side plate 3 is fixed to the side of the shroud 1, and the motor 4 is fixed to the side plate 3.

[0025] The motor 4 includes a front cover 41, an output shaft 42, a rear cover 45, and a stator 46. The mounting structure of the motor 4 includes a connecting plate 5, an outwardly extending and annular positioning part 43 on the front cover 41, and a positioning hole 6 located in the side plate 3. The stator 46 is located between the front cover 41 and the rear cover 45. The motor 4 is fixedly connected to the connecting plate 5 by a second fastener 14 passing through the connecting plate 5, the front cover 41, the stator 46, and the rear cover 45. The second fastener 14 is a long bolt.

[0026] In this embodiment, four snap-fit ​​holes 11 are spaced apart in the side plate 3, surrounding the positioning hole 6. Four snap-fit ​​pieces 12 are spaced apart on the connecting plate 5. The snap-fit ​​pieces 12 pass through the snap-fit ​​holes 11 and the connecting plate 5 can be rotated to snap the connecting plate 5 and the side plate 3 together. In actual production, the number of snap-fit ​​holes 11 and snap-fit ​​pieces 12 can be three or six. The front cover 41 has a protruding lug 44. The motor 4 is fixedly connected to the side plate 3 through the connecting plate 5 by a first fastener 13 passing through the lug 44, the connecting plate 5 and the side plate 3. The first fastener 13 is a short bolt.

[0027] The outer peripheral wall of the positioning part 43 has a first positioning surface 7 arranged at an inclination. The first positioning surface 7 is close to the end of the outer end of the positioning part 43. The wall of the positioning hole 6 has a second positioning surface 8 arranged at an inclination. The first positioning surface 7 and the second positioning surface 8 are both inclined outward along the direction of the impeller 2 toward the motor 4. The connecting plate 5 has a through hole 10. The positioning part 43 passes through the through hole 10 and the positioning hole 6. There is a certain distance between the outer peripheral wall of the positioning part 43 and the wall of the through hole 10. The first positioning surface 7 is attached to the second positioning surface 8. The output shaft 42 passes through the positioning part 43 and is connected to the impeller 2. The central axes of the output shaft 42, the positioning part 43 and the positioning hole 6 coincide.

[0028] In this embodiment, two buffer holes 9 are provided in the side plate 3. The buffer holes 9 are arranged at equal intervals around the positioning hole 6. The buffer holes 9 are connected to the positioning hole 6. In actual production, the number of buffer holes 9 can be three or four.

[0029] During assembly, first assemble the fan cover 1, impeller 2 and side plate 3 into a whole, then assemble the connecting plate 5 and motor 4 into a whole, then insert the positioning part 43 into the positioning hole 6, insert the snap-fit ​​piece 12 into the snap-fit ​​hole 11, then rotate the connecting plate 5 so that the first positioning surface 7 abuts against the second positioning surface 8, so that the snap-fit ​​piece 12 snaps into the side plate 3, and then the first fastener 13 is inserted through the lug 44, the connecting plate 5 and the side plate 3.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0031] Although this document frequently uses terms such as fan cover 1, impeller 2, side plate 3, motor 4, front cover 41, output shaft 42, positioning part 43, lug 44, rear cover 45, stator 46, connecting plate 5, positioning hole 6, first positioning surface 7, second positioning surface 8, buffer hole 9, through hole 10, snap-fit ​​hole 11, snap-fit ​​piece 12, first fastener 13, and second fastener 14, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A motor mounting structure for a cross-flow fan, the cross-flow fan comprising a shroud (1), an impeller (2) located in the shroud (1), and a side plate (3) fixedly connected to the side of the shroud (1), the motor (4) comprising a front end cover (41) and an output shaft (42), characterized in that, The mounting structure includes a connecting plate (5), a positioning part (43) extending outward and forming an annular shape on the front end cover (41), and a positioning hole (6) located in the side plate (3). The motor (4) is fixedly connected to the side plate (3) through the connecting plate (5). The positioning part (43) passes through the positioning hole (6) and the outer peripheral wall of the positioning part (43) abuts against the hole wall of the positioning hole (6). The output shaft (42) passes through the positioning part (43) and is connected to the impeller (2). The central axes of the output shaft (42), the positioning part (43), and the positioning hole (6) coincide.

2. The motor mounting structure for a cross-flow fan according to claim 1, characterized in that, The outer peripheral wall of the positioning part (43) has a first positioning surface (7) arranged in an inclined manner, and the hole wall of the positioning hole (6) has a second positioning surface (8) arranged in an inclined manner. The first positioning surface (7) and the second positioning surface (8) are both inclined outward along the direction of the impeller (2) toward the motor (4), and the first positioning surface (7) can abut against the second positioning surface (8).

3. The motor mounting structure for a cross-flow fan according to claim 2, characterized in that, The first positioning surface (7) is located at the end near the outer end of the positioning part (43).

4. The motor mounting structure of a cross-flow fan according to claim 1, 2, or 3, characterized in that, The side plate (3) is provided with a plurality of buffer holes (9), which are arranged at equal intervals around the positioning hole (6), and the buffer holes (9) are connected to the positioning hole (6).

5. The motor mounting structure of a cross-flow fan according to claim 1, 2, or 3, characterized in that, The connecting plate (5) has a through hole (10), the positioning part (43) passes through the through hole (10), and there is a certain distance between the outer peripheral wall of the positioning part (43) and the hole wall of the through hole (10).

6. The motor mounting structure of a cross-flow fan according to claim 1, 2, or 3, characterized in that, The side plate (3) is also provided with a number of snap-fit ​​holes (11) at intervals. The snap-fit ​​holes (11) are arranged around the positioning hole (6). The connecting plate (5) is provided with a number of snap-fit ​​pieces (12) at intervals. The snap-fit ​​pieces (12) pass through the snap-fit ​​holes (11) and the connecting plate (5) can be rotated to make the connecting plate (5) and the side plate (3) snap-fit ​​together.

7. The motor mounting structure of a cross-flow fan according to claim 1, 2, or 3, characterized in that, The front cover (41) also has a protruding lug (44), and the motor (4) is fixedly connected to the side plate (3) through the connecting plate (5) by a first fastener (13) passing through the lug (44), the connecting plate (5) and the side plate (3).

8. The motor mounting structure of a cross-flow fan according to claim 1, 2, or 3, characterized in that, The motor (4) also includes a rear end cover (45) and a stator (46). The stator (46) is located between the front end cover (41) and the rear end cover (45). The motor (4) is fixedly connected to the connecting plate (5) by means of a second fastener (14) passing through the connecting plate (5), the front end cover (41), the stator (46) and the rear end cover (45).

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