Motor fixing structure for exhaust fan and turbofan

Abstract

The utility model provides a motor fixing structure for an exhaust fan and a turbofan, the motor fixing structure comprises a motor shell arranged outside a motor, the motor shell comprises an upper shell and a lower shell, the butt joint of the upper shell and the lower shell extends outwards along the radial direction to form an outer flange, the outer flange is fixedly provided with a fixing column, and the fixing column is fixedly connected with the motor shell. The fixing column is sleeved with a flexible piece, and the outer wall of the flexible piece is connected with the fan shell through a motor support. According to the motor fixing structure, the motor and the fan shell are fixedly connected in a flexible connection mode, vibration transmission caused by rigid contact is avoided, the vibration reduction effect is achieved, the vibration transmission efficiency during motor operation is greatly reduced, and noise caused by vibration is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of turbofan vibration reduction, in particular to a motor fixing structure for an exhaust fan and a turbofan. Background Art

[0002] Turbofans are used everywhere in modern life. When a turbofan is running, the rotation of the motor often brings about certain vibrations, which not only damages the equipment, but also increases the noise of the turbofan, affecting the user experience. In addition, the motor and the turbofan housing are rigidly connected through the motor bracket, and the vibration will be transmitted to the housing through the motor bracket, further amplifying the vibration and causing the vibration noise to increase further.

[0003] In the prior art, the vibration of the motor is usually reduced by improving the machining accuracy and installation accuracy of the motor shaft, thereby reducing the vibration and noise of the motor during operation. However, the method of achieving low vibration and low noise by improving the machining accuracy and installation accuracy will not only increase the difficulty of production and installation, but also greatly increase the production cost, which is not conducive to the requirement of reducing costs.

[0004] Therefore, those skilled in the art are in urgent need of a motor fixing structure that is simple in structure, low in production cost, simple in installation, has a good vibration reduction effect and reduces fan noise. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a motor fixing structure and a turbofan for an exhaust fan, so as to solve the vibration transmission and noise caused by the rigid connection of the turbofan motor in the prior art, reduce the vibration transmission efficiency, reduce the installation difficulty, and reduce the production cost.

[0006] The utility model provides a motor fixing structure for an exhaust fan, the motor fixing structure comprising: a motor casing arranged outside the motor, the motor casing comprising an upper casing and a lower casing, an outer flange extending radially outward at a joint between the upper casing and the lower casing, a fixing column being fixedly arranged on the outer flange, a flexible member being sleeved on the fixing column, and an outer wall of the flexible member being connected to the fan casing through a motor bracket.

[0007] Furthermore, the flexible member is a columnar structure, and a fixing hole is provided at the axis of the flexible member; and an outer wall of the flexible member has an annular fixing groove for clamping the motor bracket.

[0008] Furthermore, the outer flange has a through hole, one end of the fixing column is embedded in the through hole, the flexible member is sleeved on the fixing column from the other end, and the flexible member is fixedly connected to the fixing column at the other end of the fixing column through a gasket and a screw.

[0009] The utility model provides a motor fixing structure for an exhaust fan, the motor fixing structure comprising: a motor housing arranged outside the motor, a motor bracket fixedly arranged on the outer wall of the motor housing, at least three clamping rings for clamping a flexible part are evenly arranged on the circumference of the motor bracket, and the flexible part is sleeved on the connecting column of the fan housing.

[0010] Furthermore, the flexible member is a columnar structure, and has a fixing hole at the axis of the flexible member, and the connecting column is inserted into the fixing hole; the outer wall of the flexible member has an annular fixing groove, and the clamping ring is clamped in the annular fixing groove.

[0011] The utility model provides a motor fixing structure for an exhaust fan, the motor fixing structure comprising: a motor bracket, on which a motor is fixedly arranged, at least three clamping rings for clamping a flexible member are evenly arranged on the circumference of the motor bracket, and the flexible member is sleeved on a connecting column of a fan housing.

[0012] Furthermore, the flexible member is a columnar structure, and has a fixing hole at the axis of the flexible member, and the connecting column is inserted into the fixing hole; the outer wall of the flexible member has an annular fixing groove, and the clamping ring is clamped in the annular fixing groove.

[0013] The utility model provides a turbofan, which includes the above-mentioned motor fixing structure, the motor is connected to one end of the rotating shaft, the other end of the rotating shaft is fixedly provided with a turbine, the axial direction of the turbine corresponds to an air inlet, a cover plate is provided at the air inlet, and the cover plate is fixedly connected to the fan housing.

[0014] Furthermore, a volute cover for increasing the air pressure in the casing is fixedly disposed inside the fan casing, and the volute cover is an annular structure and is disposed around the inner wall of the fan casing.

[0015] Furthermore, the outer wall of the fan housing has a plurality of uniformly arranged reinforcing ribs.

[0016] According to the above embodiments, the motor fixing structure and turbofan for exhaust fans provided by the utility model have at least the following benefits: the motor fixing structure provided by the utility model fixes the motor and the housing by means of a flexible connection, thereby avoiding the vibration transmission caused by rigid contact, achieving the effect of vibration reduction, greatly reducing the efficiency of vibration transmission when the motor is running, and effectively reducing the noise caused by vibration. In addition, it also effectively avoids damage to fan parts caused by long-term vibration. It reduces the production cost and the difficulty of installation, and improves production efficiency.

[0017] It should be understood that the above general description and the following specific embodiments are only exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are a part of the specification of the present utility model, which illustrate exemplary embodiments of the present utility model. The attached drawings and the description of the specification are used to explain the principle of the present utility model.

[0019] Figure 1 A cross-sectional view of a first embodiment of a motor fixing structure for an exhaust fan provided by the utility model.

[0020] Figure 2 This is a front view of Embodiment 1 of the motor fixing structure for an exhaust fan provided by the utility model.

[0021] Figure 3 A top view of a first embodiment of a motor fixing structure for an exhaust fan provided by the utility model.

[0022] Figure 4 A cross-sectional view of a second embodiment of a motor fixing structure for an exhaust fan provided by the utility model.

[0023] Figure 5 This is an exploded view of Embodiment 2 of the motor fixing structure for an exhaust fan provided by the utility model.

[0024] Figure 6 This is a cross-sectional view of Embodiment 3 of the motor fixing structure for an exhaust fan provided by the utility model.

[0025] Figure 7 This is an exploded view of Embodiment 3 of the motor fixing structure for an exhaust fan provided by the utility model.

[0026] Figure 8 A cross-sectional view of a fourth embodiment of a motor fixing structure for an exhaust fan provided by the utility model.

[0027] Fig. 9 This is an exploded view of Embodiment 4 of the motor fixing structure for an exhaust fan provided by the utility model.

[0028] Fig.10 This is a structural diagram of the flexible member of the motor fixing structure for the exhaust fan provided by the utility model.

[0029] Fig.11 This is a cross-sectional view of a first embodiment of the turbofan provided by the utility model.

[0030] Fig.12 This is a stereoscopic diagram of a first embodiment of the turbofan provided by the utility model.

[0031] Fig.13 This is a cross-sectional view of a second embodiment of the turbofan provided by the utility model.

[0032] Fig.14 This is a stereoscopic diagram of a second embodiment of the turbofan provided by the utility model.

[0033] Fig.15 A three-dimensional diagram of the turbofan embodiment 3 provided by the utility model

[0034] Description of reference numerals:

[0035] 1-motor housing, 2-flexible part, 3-motor bracket, 4-fan housing, 5-gasket, 6-screw, 7-motor, 8-rotating shaft, 9-turbine, 10-cover plate, 11-volute cover, 12-reinforcement rib, 13-bearing, 14-motor cover;

[0036] 101-upper shell, 102-lower shell, 103-outer flange, 104-fixing column;

[0037] 201-elastic nipple, 202-elastic convex strip;

[0038] 301-Snap ring;

[0039] 401-connecting column;

[0040] 701-motor stator, 702-motor rotor. DETAILED DESCRIPTION

[0041] Various exemplary embodiments of the present invention are now described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features and embodiments of the present invention.

[0042] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention will be apparent to those skilled in the art. The present application description and examples are merely exemplary.

[0043] The utility model provides a motor fixing structure for an exhaust fan, such as Figure 1-3The structure diagram of the first embodiment of the motor fixing structure is shown. In a specific implementation, the motor fixing structure includes: a motor housing 1 arranged outside the motor 7, the motor housing 1 includes an upper housing 101 and a lower housing 102, an outer flange 103 extends radially outward from the joint between the upper housing 101 and the lower housing 102, a fixing column 104 is fixedly arranged on the outer flange 103, a flexible member 2 is sleeved on the fixing column 104, and the outer wall of the flexible member 2 is connected to the fan housing 4 through the motor bracket 3. This structure realizes a flexible connection between the motor housing 1 and the motor bracket 3, thereby achieving a vibration reduction effect when the motor 7 rotates, reducing the transmission efficiency of the vibration, and reducing the noise caused by the vibration.

[0044] In this embodiment, the motor 7 includes a motor stator 701 and a motor rotor 702. The motor stator 701 is fixedly arranged on the inner wall of the motor housing 1, and the motor rotor 702 is fixed on the rotating shaft 8. The rotating shaft 8 is connected to the motor housing 1 through a bearing 13, and the motor rotor 702 is located between the motor stator 701, and is used to act on the motor stator 701 after power is supplied, so as to drive the rotating shaft 8 to rotate.

[0045] In the specific implementation of this embodiment, Fig.10 As shown, the flexible member 2 is a columnar structure, and a fixing hole is provided at the axis of the flexible member 2 , and the flexible member 2 is sleeved on the fixing column 104 through the fixing hole.

[0046] The outer wall of the flexible member 2 has an annular fixing groove for clamping the motor bracket 3. The clamping ring 301 on the motor bracket 3 can be clamped in the annular fixing groove, thereby realizing a flexible connection between the motor housing 1 and the motor bracket 3.

[0047] In this embodiment, multiple elastic nipples 201 are provided at both ends of the flexible member 2 and the upper and lower surfaces of the annular fixing groove to reduce the contact area between the flexible member 2 and the outer flange 103 and the clamping ring 301, thereby reducing the vibration transmission efficiency.

[0048] In addition, the side wall of the flexible member 2, the annular fixing groove and the inner wall of the fixing through hole are all provided with elastic convex strips 202 for reducing the contact area and lowering the transmission efficiency of vibration.

[0049] In a specific implementation of this embodiment, the outer flange 103 has a through hole, one end of the fixing column 104 is embedded in the through hole, the flexible component 2 is sleeved on the fixing column 104 from the other end, and the flexible component 2 is fixedly connected to the fixing column 104 at the other end of the fixing column 104 through a gasket 5 and a screw 6.

[0050] The utility model provides a motor fixing structure for an exhaust fan, such as Figure 4 and 5The structure diagram of the second embodiment of the motor fixing structure is shown. In a specific embodiment, the motor fixing structure includes: a motor housing 1 arranged outside the motor 7, a motor bracket 3 is fixedly arranged on the outer wall of the motor housing 1, at least three snap rings 301 for clamping the flexible member 2 are evenly arranged on the circumference of the motor bracket 3, and the flexible member 2 is sleeved on the connecting column 401 of the fan housing 4, so as to realize the flexible connection between the motor bracket 3 and the fan housing 4, thereby realizing the effect of vibration reduction when the motor 7 rotates, reducing the transmission efficiency of vibration, and reducing the noise caused by vibration. Preferably, the connecting column 401 is arranged integrally with the fan housing 4.

[0051] In this embodiment, the motor 7 includes a motor stator 701 and a motor rotor 702. The motor stator 701 is fixedly arranged on the inner wall of the motor housing 1, and the motor rotor 702 is fixed on the rotating shaft 8. The rotating shaft 8 is connected to the motor housing 1 through a bearing 13, and the motor rotor 702 is located between the motor stator 701, and is used to act on the motor stator 701 after power is supplied, so as to drive the rotating shaft 8 to rotate.

[0052] In the specific implementation of this embodiment, Fig.10 As shown, the flexible member 2 is a columnar structure, and has a fixing hole at the axis of the flexible member 2. The connecting column 401 is inserted into the fixing hole, and then a gasket 5 and a screw 6 are arranged at the end of the connecting column 401 to fix the flexible member 2 on the fan housing 4.

[0053] The outer wall of the flexible member 2 has an annular fixing groove, and the clamping ring 301 is clamped in the annular fixing groove, so as to realize the flexible connection between the motor bracket 3 and the fan housing 4.

[0054] In this embodiment, multiple elastic nipples 201 are provided at both ends of the flexible member 2 and the upper and lower surfaces of the annular fixing groove to reduce the contact area between the flexible member 2 and the clamping ring 301 and the fan housing 4, thereby reducing the vibration transmission efficiency.

[0055] In addition, the side wall of the flexible member 2, the annular fixing groove and the inner wall of the fixing through hole are all provided with elastic convex strips 202 for reducing the contact area and lowering the transmission efficiency of vibration.

[0056] In the specific implementation of this embodiment, the motor housing 1 includes an upper housing 101 and a lower housing 102. The upper housing 101 and the lower housing 102 are connected at a joint to form an outer flange 103 extending radially outward, and the motor bracket 3 is fixedly connected to the outer flange 103 by screws.

[0057] like Figure 6 and 7Shown is a structural diagram of a third embodiment of a motor fixing structure for an exhaust fan provided by the utility model. The difference between this embodiment and the second embodiment is that, in this embodiment, the motor bracket 3 and the retaining ring 301 are connected by an extension portion, and the extension portion extends downward or upward along the axis of the motor bracket 3, and the retaining ring 301 is fixedly provided at the end of the extension.

[0058] The utility model provides a motor fixing structure for an exhaust fan, such as Figure 8 and 9 The structure diagram of the fourth embodiment of the motor fixing structure is shown. In a specific embodiment, the motor fixing structure includes: a motor bracket 3, a motor 7 is fixedly arranged on the motor bracket 3, at least three snap rings 301 for clamping the flexible member 2 are evenly arranged on the circumference of the motor bracket 3, and the flexible member 2 is sleeved on the connecting column 401 of the fan housing 4. In this way, a flexible connection between the motor bracket 3 and the fan housing 4 is achieved, and then the vibration reduction effect is achieved when the motor 7 rotates, the transmission efficiency of the vibration is reduced, and the noise caused by the vibration is reduced. Preferably, the connecting column 401 is integrally arranged with the fan housing 4.

[0059] In this embodiment, the motor 7 includes a motor stator 701 and a motor rotor 702. The motor stator 701 is fixedly arranged on the motor bracket 3, and the motor bracket 3 is fixedly connected to one end of the rotating shaft 8 through the bearing 13. The rotating shaft 8 is fixedly provided with a motor housing 1, and the inner wall of the motor housing 1 is provided with a motor rotor 702. The motor rotor 702 surrounds the motor stator 701 and is used to act on the motor stator 701 after power is supplied, so as to drive the rotating shaft 8 to rotate.

[0060] In the specific implementation of this embodiment, Fig.10 As shown, the flexible member 2 is a columnar structure, and has a fixing hole at the axis of the flexible member 2. The connecting column 401 is inserted into the fixing hole, and then a gasket 5 and a screw 6 are arranged at the end of the connecting column 401 to fix the flexible member 2 on the fan housing 4.

[0061] The outer wall of the flexible member 2 has an annular fixing groove, and the clamping ring 301 is clamped in the annular fixing groove, so as to realize the flexible connection between the motor bracket 3 and the fan housing 4.

[0062] In this embodiment, multiple elastic nipples 201 are provided at both ends of the flexible member 2 and the upper and lower surfaces of the annular fixing groove to reduce the contact area between the flexible member 2 and the clamping ring 301 and the fan housing 4, thereby reducing the vibration transmission efficiency.

[0063] In addition, the side wall of the flexible member 2, the annular fixing groove and the inner wall of the fixing through hole are all provided with elastic convex strips 202 for reducing the contact area and lowering the transmission efficiency of vibration.

[0064] In a specific implementation manner of this embodiment, a motor cover 14 is fixedly provided on the upper portion of the motor bracket 3 by screws. The motor cover 14 is sleeved on the outside of the motor 7 to protect the motor 7 .

[0065] The utility model provides a turbo fan, such as Fig.11 and Fig.12 The structure diagram of the first embodiment of the turbofan is shown. In a specific implementation, the turbofan includes the motor fixing structure in the second embodiment described above, the motor 7 is connected to one end of the rotating shaft 8, and the other end of the rotating shaft 8 is fixedly provided with a turbine 9, the axial corresponding position of the turbine 9 is an air inlet, and the turbine 9 has an air outlet on the side wall corresponding to the fan housing 4 in the radial direction. A cover plate 10 is provided at the air inlet, and the cover plate 10 is fixedly connected to the fan housing 4. The cover plate 10 is also provided with an air inlet, and there are fixing holes around the cover plate for fixing the turbofan in a ventilated place by fasteners such as bolts.

[0066] In the specific implementation of this embodiment, a volute cover 11 for increasing the air pressure in the housing is fixedly arranged inside the fan housing 4. The volute cover 11 is an annular structure and is arranged around the inner wall of the fan housing 4. The volute cover 11 has an arc-shaped extension near the turbine 9, and the arc-shaped extension is close to the hub of the turbine 9, which is used to reduce the gap between the volute cover and the turbine, reduce the gas backflow, and then increase the air pressure inside the fan housing 4, and improve the air outlet efficiency.

[0067] The utility model provides a turbo fan, such as Fig.13 and Fig.14 The structure diagram of the second embodiment of the turbofan is shown. In a specific implementation, the turbofan includes the motor fixing structure in the fourth embodiment described above, the motor 7 is connected to one end of the rotating shaft 8, and the other end of the rotating shaft 8 is fixedly provided with a turbine 9, the axial corresponding position of the turbine 9 is an air inlet, and the turbine 9 has an air outlet on the side wall corresponding to the fan housing 4 in the radial direction. A cover plate 10 is provided at the air inlet, and the cover plate 10 is fixedly connected to the fan housing 4. The cover plate 10 is also provided with an air inlet, and there are fixing holes around the cover plate for fixing the turbofan in a ventilated place by fasteners such as bolts.

[0068] In the specific implementation of this embodiment, a volute cover 11 for increasing the air pressure in the housing is fixedly arranged inside the fan housing 4. The volute cover 11 is an annular structure and is arranged around the inner wall of the fan housing 4. The volute cover 11 has an arc-shaped extension near the turbine 9, and the arc-shaped extension is close to the hub of the turbine 9, which is used to reduce the gap between the volute cover and the turbine, reduce the gas backflow, and then increase the air pressure inside the fan housing 4, and improve the air outlet efficiency.

[0069] like Fig.15Shown is a structural diagram of a third embodiment of a turbofan provided by the utility model. The difference between this embodiment and the second embodiment is that in this embodiment, a plurality of uniformly arranged reinforcing ribs 12 are provided on the outer wall of the fan housing 4 to improve the structural strength of the fan housing 4.

[0070] The above description is only an illustrative specific implementation of the present invention. Without departing from the concept and principle of the present invention, any equivalent changes and modifications made by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A motor fixing structure for an exhaust fan, characterized in that: The motor fixing structure comprises: a motor housing (1) arranged outside a motor (7), the motor housing (1) comprising an upper housing (101) and a lower housing (102), an outer flange (103) extending radially outward from a joint between the upper housing (101) and the lower housing (102), a fixing column (104) fixedly arranged on the outer flange (103), a flexible member (2) sleeved on the fixing column (104), and an outer wall of the flexible member (2) connected to a fan housing (4) via a motor bracket (3).

2. The motor fixing structure for an exhaust fan according to claim 1, characterized in that: The flexible member (2) is a columnar structure, and a fixing hole is provided at the axis of the flexible member (2); The outer wall of the flexible member (2) has an annular fixing groove for clamping the motor bracket (3).

3. The motor fixing structure for an exhaust fan according to claim 2, characterized in that: The outer flange (103) has a through hole, one end of the fixing column (104) is embedded in the through hole, the flexible member (2) is sleeved on the fixing column (104) from the other end, and the flexible member (2) is fixedly connected to the fixing column (104) at the other end of the fixing column (104) by a gasket (5) and a screw (6).

4. A motor fixing structure for an exhaust fan, characterized in that: The motor fixing structure comprises: a motor housing (1) arranged outside a motor (7); a motor bracket (3) is fixedly arranged on the outer wall of the motor housing (1); at least three clamping rings (301) for clamping a flexible member (2) are evenly arranged on the circumference of the motor bracket (3); and the flexible member (2) is sleeved on a connecting column (401) of a fan housing (4).

5. The motor fixing structure for an exhaust fan according to claim 4, characterized in that: The flexible member (2) is a columnar structure, and the flexible member (2) has a fixing hole at its axis, and the connecting column (401) is inserted into the fixing hole; The outer wall of the flexible member (2) has an annular fixing groove, and the clamping ring (301) is clamped in the annular fixing groove.

6. A motor fixing structure for an exhaust fan, characterized in that: The motor fixing structure comprises: a motor bracket (3), a motor (7) being fixedly mounted on the motor bracket (3), at least three clamping rings (301) being evenly arranged on the circumference of the motor bracket (3) for clamping a flexible member (2), and the flexible member (2) being sleeved on a connecting column (401) of a fan housing (4).

7. The motor fixing structure for an exhaust fan according to claim 6, characterized in that: The flexible member (2) is a columnar structure, and the flexible member (2) has a fixing hole at its axis, and the connecting column (401) is inserted into the fixing hole; The outer wall of the flexible member (2) has an annular fixing groove, and the clamping ring (301) is clamped in the annular fixing groove.

8. A turbo fan, characterized in that: The turbofan comprises a motor fixing structure as described in any one of claims 1 to 7, wherein the motor (7) is connected to one end of a rotating shaft (8), a turbine (9) is fixedly provided at the other end of the rotating shaft (8), the turbine (9) axially corresponds to an air inlet, a cover plate (10) is provided at the air inlet, and the cover plate (10) is fixedly connected to the fan housing (4).

9. The turbofan according to claim 8, characterized in that: A volute cover (11) for increasing the air pressure in the casing is fixedly arranged inside the fan casing (4); the volute cover (11) is an annular structure and is arranged around the inner wall of the fan casing (4).

10. The turbo fan according to claim 8, characterized in that: The outer wall of the fan housing (4) is provided with a plurality of uniformly arranged reinforcing ribs (12).

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