Backward-tilting direct-connection centrifugal fan

Abstract

The utility model discloses a retroverted direct connection centrifugal fan which comprises a fan, a motor and a base, the fan is fixed on one side of the top of the base, a motor sliding rail is fixed on the other side of the top of the base, the motor is arranged on the other side of the base in a sliding mode, and the motor drives the fan to operate through a belt. A bolt matching groove is formed in one side of the motor sliding rail, a rolling shaft is installed on the surface of the bottom of the motor, the rolling shaft is matched with the surface of the side, not provided with the bolt matching groove, of the motor sliding rail, the motor is installed on the motor sliding rail through a locking mechanism, and the locking mechanism is composed of an anti-skid gasket and a locking bolt. According to the utility model, the rolling shaft for assisting movement is additionally arranged at the bottom of the motor, and meanwhile, the motor sliding rail is divided into two parts, one part is the bolt matching groove for matching with the bolt, and the other part is the smooth plane for matching with the rolling shaft at the bottom of the motor, so that the motor is convenient to move, and meanwhile, the fixation of the motor is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flow fans, in particular to a backward inclined direct-connected centrifugal fan. Background Art

[0002] Centrifugal fans can be used in other fields, such as ventilation in factories, mines, tunnels, ships, etc. At present, the position of the motor of the centrifugal fan is not convenient to adjust, and after a period of use, the belt becomes loose and cannot be tightened quickly.

[0003] The existing backward-inclined centrifugal fan with announcement number CN219452476U includes a base, a fan body and a motor. The movable motor is used to quickly adjust the tightness of the belt. However, the motor is heavy and difficult to move. Utility Model Content

[0004] The utility model aims to provide a backward-inclined direct-connected centrifugal fan to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a backward-inclined direct-connected centrifugal fan, comprising a fan, a motor and a base, wherein the fan is fixed to one side of the top of the base, a motor slide rail is fixed to the other side of the top of the base, the motor is slidably arranged on the other side of the base, the motor drives the fan to operate through a belt, a bolt matching groove is provided on one side of the motor slide rail, a roller is installed on the bottom surface of the motor, the roller cooperates with the side surface of the motor slide rail where the bolt matching groove is not provided, the motor is installed on the motor slide rail through a locking mechanism, the locking mechanism is composed of an anti-slip gasket and a locking bolt, the anti-slip gasket is sleeved on the locking bolt and is arranged between the motor and the motor slide rail.

[0006] Preferably, a belt tensioning mechanism is additionally provided between the fan and the motor.

[0007] Preferably, the belt tensioning mechanism is composed of an electric telescopic column, a tensioning wheel mounting seat and a tensioning wheel, the tensioning wheel mounting seat is fixed to the top of the electric telescopic column, and the tensioning wheel is rotatably mounted on one side of the tensioning wheel mounting seat.

[0008] Preferably, the belt tensioning mechanism consists of an electric telescopic column, a tensioning wheel mounting seat and a tensioning wheel, a positioning shaft is fixed to the bottom of the tensioning wheel mounting seat, the positioning shaft is inserted into the top of the electric telescopic column, a lower connecting plate is fixed to the telescopic part of the electric telescopic column, an upper connecting plate is fixed to the side of the tensioning wheel mounting seat, the upper connecting plate and the lower connecting plate are connected by a tension spring, and the tensioning wheel is rotatably mounted on one side of the tensioning wheel mounting seat.

[0009] Compared with the prior art, the utility model has the following beneficial effects: the utility model adds a roller for assisting movement at the bottom of the motor, and at the same time divides the motor slide rail into two parts, one part is a bolt matching groove for matching bolts, and the other part is a smooth plane for matching the roller at the bottom of the motor, so that the motor can be moved conveniently without affecting the fixation of the motor. The locking mechanism of the utility model is composed of an anti-skid gasket and a locking bolt, the locking bolt is used to match the bolt matching groove for fixing the motor, and the anti-skid gasket is used to increase the friction between the motor and the motor slide rail, thereby improving the problem of reduced stability of the motor caused by adding a roller at the bottom of the motor;

[0010] Since the motor is fixed by a locking bolt, although the belt can be adjusted by simply moving the motor, the process is relatively troublesome, so the utility model also adds a belt tensioning mechanism;

[0011] The utility model provides two types of belt tensioning mechanisms. One is a simple structure consisting of an electric telescopic column, a tensioning wheel mounting seat and a tensioning wheel. The lifting and lowering of the tensioning wheel is controlled by the extension and retraction of the electric telescopic column, thereby realizing the tightness adjustment of the belt. The other is an improvement on the first type, in which the fixed connection between the tensioning wheel mounting seat and the electric telescopic column is changed to a sliding connection through a positioning shaft, and the connection and fixation are performed through a tension spring. After the improvement, the force applied by the tensioning wheel to the belt will not be greater than the tension of the tension spring, thereby avoiding excessive force applied by the tensioning wheel to the belt, resulting in poor belt operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the base and the belt tensioning mechanism of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the locking mechanism of the utility model.

[0016] In the figure: 1. fan; 2. motor; 3. base; 4. belt; 5. belt tensioning mechanism; 6. electric telescopic column; 7. lower connecting plate; 8. positioning shaft; 9. tension wheel mounting seat; 10. tension wheel; 11. upper connecting plate; 12. tension spring; 13. motor slide rail; 14. bolt matching groove; 15. locking mechanism; 16. roller; 17. anti-slip gasket; 18. locking bolt. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0018] See also Figure 1-3 In an embodiment of the utility model, a backward-inclined direct-connected centrifugal fan includes a fan 1, a motor 2 and a base 3. The fan 1 is fixed to one side of the top of the base 3, and a motor slide rail 13 is fixed to the other side of the top of the base 3. The motor 2 is slidably arranged on the other side of the base 3. The motor 2 drives the fan 1 to operate through a belt 4. A bolt matching groove 14 is opened on one side of the motor slide rail 13. A roller 16 is installed on the bottom surface of the motor 2. The roller 16 cooperates with the side surface of the motor slide rail 13 where the bolt matching groove 14 is not set. The motor 2 is installed on the motor slide rail 13 through a locking mechanism 15. The locking mechanism 15 is composed of an anti-slip gasket 17 and a locking bolt 18. The anti-slip gasket 17 is sleeved on the locking bolt 18 and is arranged between the motor 2 and the motor slide rail 13.

[0019] A belt tensioning mechanism 5 is additionally provided between the fan 1 and the motor 2 .

[0020] The belt tensioning mechanism 5 is composed of an electric telescopic column 6 , a tensioning wheel mounting seat 9 and a tensioning wheel 10 . The tensioning wheel mounting seat 9 is fixed to the top of the electric telescopic column 6 , and the tensioning wheel 10 is rotatably mounted on one side of the tensioning wheel mounting seat 9 .

[0021] The belt tensioning mechanism 5 is composed of an electric telescopic column 6, a tensioning wheel mounting seat 9 and a tensioning wheel 10. A positioning shaft 8 is fixed to the bottom of the tensioning wheel mounting seat 9, and the positioning shaft 8 is inserted into the top of the electric telescopic column 6. A lower connecting plate 7 is fixed to the telescopic part of the electric telescopic column 6, and an upper connecting plate 11 is fixed to the side of the tensioning wheel mounting seat 9. The upper connecting plate 11 is connected to the lower connecting plate 7 by a tension spring 12, and the tensioning wheel 10 is rotatably mounted on one side of the tensioning wheel mounting seat 9.

[0022] The working principle of the utility model is as follows: the utility model adds a roller 16 for assisting movement at the bottom of the motor 2, and at the same time divides the motor slide rail 13 into two parts, one part is a bolt matching groove 14 for matching bolts, and the other part is a smooth plane for matching the roller 16 at the bottom of the motor 2, so that the motor 2 can be moved conveniently without affecting the fixation of the motor 2. The locking mechanism 15 of the utility model is composed of an anti-skid pad 17 and a locking bolt 18. The locking bolt 18 is used to match the bolt matching groove 14 to fix the motor 2, and the anti-skid pad 17 is used to increase the friction between the motor 2 and the motor slide rail 13, thereby improving the problem of reduced stability of the motor 2 caused by adding the roller 16 at the bottom of the motor 2;

[0023] Since the motor 2 is fixed by the locking bolt 18, although the belt 4 can be adjusted in tension by simply moving the motor 2, the process is rather troublesome, so the utility model further provides a belt tensioning mechanism 5;

[0024] There are two types of belt tensioning mechanisms 5 of the utility model. One is a simple structure composed of an electric telescopic column 6, a tensioning wheel mounting seat 9 and a tensioning wheel 10. The lifting and lowering of the tensioning wheel 10 is controlled by the extension and retraction of the electric telescopic column 6, thereby realizing the tightness adjustment of the belt 4. The other is an improvement on the first type, in which the fixed connection between the tensioning wheel mounting seat 9 and the electric telescopic column 6 is changed to a sliding connection through a positioning shaft 8, and the connection and fixation are carried out through a tension spring 12. After the improvement, the force applied by the tensioning wheel 10 to the belt 4 will not be greater than the tension of the tension spring 12, thereby avoiding excessive force applied by the tensioning wheel 10 to the belt 4, causing the belt 4 to run poorly.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A backward-inclined direct-connected centrifugal fan, comprising a fan (1), a motor (2) and a base (3), wherein the fan (1) is fixed to one side of the top of the base (3), a motor slide rail (13) is fixed to the other side of the top of the base (3), the motor (2) is slidably arranged on the other side of the base (3), and the motor (2) drives the fan (1) to operate via a belt (4), characterized in that: A bolt matching groove (14) is provided on one side of the motor slide rail (13); a roller (16) is installed on the bottom surface of the motor (2); the roller (16) matches with the surface of the side of the motor slide rail (13) where the bolt matching groove (14) is not provided; the motor (2) is installed on the motor slide rail (13) through a locking mechanism (15); the locking mechanism (15) is composed of an anti-slip gasket (17) and a locking bolt (18); the anti-slip gasket (17) is sleeved on the locking bolt (18) and is arranged between the motor (2) and the motor slide rail (13).

2. The backward-inclined direct-connected centrifugal fan according to claim 1, characterized in that: A belt tensioning mechanism (5) is additionally provided between the fan (1) and the motor (2).

3. The backward-inclined direct-connected centrifugal fan according to claim 2, characterized in that: The belt tensioning mechanism (5) is composed of an electric telescopic column (6), a tensioning wheel mounting seat (9) and a tensioning wheel (10); the tensioning wheel mounting seat (9) is fixed to the top of the electric telescopic column (6), and the tensioning wheel (10) is rotatably mounted on one side of the tensioning wheel mounting seat (9).

4. The backward-inclined direct-connected centrifugal fan according to claim 2, characterized in that: The belt tensioning mechanism (5) is composed of an electric telescopic column (6), a tension wheel mounting seat (9) and a tension wheel (10). A positioning shaft (8) is fixed to the bottom of the tension wheel mounting seat (9), and the positioning shaft (8) is plugged into the top of the electric telescopic column (6). A lower connecting plate (7) is fixed to the telescopic part of the electric telescopic column (6). An upper connecting plate (11) is fixed to the side of the tension wheel mounting seat (9). The upper connecting plate (11) is connected to the lower connecting plate (7) by a tension spring (12). The tension wheel (10) is rotatably mounted on one side of the tension wheel mounting seat (9).

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