Positioning structure for motor base and mounting disc of centrifugal fan

Abstract

The utility model relates to the technical field of centrifugal fans, in particular to a positioning structure arranged on a motor base and a mounting disc of a centrifugal fan, which particularly comprises a motor base with a positioning structure and a mounting disc, a positioning flange is arranged at the bottom of a vertical plate of the motor base, and a positioning groove corresponding to the positioning flange is arranged on the mounting disc. The motor base and the mounting disc are positioned by matching of the positioning flange and the positioning groove, and the motor base and the mounting disc positioning structure has the advantages that accurate positioning is automatically completed by means of a part body structure, the positioning problem is solved, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, and particularly relates to a positioning structure arranged on a motor seat and an installation disc of a centrifugal fan. Background Art

[0002] The existing positioning method for the motor seat and the installation disc of a centrifugal fan is to use a specially customized welding positioning tooling to fix a "C"-shaped stainless steel sheet metal part with multiple flanges on the installation disc, and then use argon arc welding to weld it on the installation disc, as shown in Figure 1 and Figure 2 shown. Since this method relies on welding positioning, it is affected by the accuracy of the tooling and the tolerances between components during welding and installation, resulting in a high defect rate during the processing process and affecting its actual use. Moreover, during the welding process, the motor seat and the installation disc are prone to being installed reversely, and there are defects such as low production efficiency, high defect rate during the processing process, long tooling processing cycle, and high production cost. Content of the Utility Model

[0003] Aiming at the defects existing in the above-mentioned prior art, the technical problem to be solved by the utility model is: how to solve the problems that the motor seat and the installation disc are prone to being installed reversely during the welding process, and a special tooling needs to be customized for welding positioning, resulting in low processing efficiency and affecting the finished product quality and installation stability.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a positioning structure for a motor seat and an installation disc of a centrifugal fan, including a motor seat and an installation disc, and corresponding positioning structures are arranged on the motor seat and the installation disc; the positioning structure includes a positioning flange arranged at the bottom end of the motor seat, and further includes a positioning groove arranged on the installation disc corresponding to the positioning flange.

[0005] Further, the motor seat includes a horizontal plate on the upper side and vertical plates on both sides of the horizontal plate, and two positioning flanges are respectively arranged at the front and rear of the bottom end of each vertical plate.

[0006] Further, the lengths of the front and rear positioning flanges are different.

[0007] Further, the included angle between the side wall and the bottom wall at the front and rear sides of the vertical plate of the motor seat is a right angle or an acute angle.

[0008] Further, the connection between the vertical plate and the horizontal plate of the motor seat is a right angle or an obtuse angle.

[0009] Further, a flanging that turns outward is arranged at the bottom of the vertical plate outside the positioning flange to reserve a welding position.

[0010] Further, the positioning groove penetrates or does not penetrate the installation disc.

[0011] Advantages of the present utility model over the prior art:

[0012] 1. The positioning flange and the positioning groove are provided for self-positioning, eliminating the need for custom-made special welding positioning tooling, which can simplify the welding process and improve production efficiency.

[0013] 2. The anti-misalignment design is achieved by setting positioning flanges and positioning grooves of different lengths, which can prevent the installation disks of the motor base and the fan from being installed reversely during the production process, improving the welding qualification rate and production efficiency.

[0014] 3. The included angle between the horizontal plate and the vertical plate of the installation disk is greater than 90°, avoiding stress concentration on the vertical plate of the installation disk. At the same time, the extra effective area on both sides of the vertical plate of the installation disk optimizes the overall stress structure of the mounting seat, reduces local stress, minimizes the influence of centrifugal force and inertial force during the operation of the fan on the mounting seat, improves product safety, ensures installation stability, and reduces the vibration of the whole machine.

[0015] 4. The structure of the mounting seat is optimized from the original "several" shape to the "ㄇ" shape, which can reduce two bending edges, simplify the sheet metal hemming process, and improve production efficiency. Similarly, hemming and positioning can be combined to solve the positioning problem and improve the welding firmness, making the whole mechanism more stable. Description of the Drawings

[0016] Figure 1 Schematic diagram of the structure of a conventional centrifugal fan;

[0017] Figure 2 Schematic diagram of the installation disk and the motor base of the existing centrifugal fan;

[0018] Figure 3 Schematic diagram of the structure of the embodiment of the present utility model;

[0019] Figure 4 Schematic diagram of the motor base of the embodiment of the present utility model.

[0020] Reference numerals: 1. Motor base, 2. Installation disk, 3. Horizontal plate, 4. Vertical plate, 5. Positioning flange, 6. Positioning groove, 7. Hemming. Detailed Embodiment

[0021] The following further describes the embodiments of the present utility model in detail with reference to the drawings, but the embodiments do not limit the present utility model. Any similar structures and similar changes using the present utility model should be included in the protection scope of the present utility model.

[0022] As Figure 3 and Figure 4As shown in the figure, a positioning structure for a centrifugal fan motor base and an installation plate includes: a motor base 1, the motor base 1 includes a horizontal plate 3 on the upper side, and vertical plates 4 on both sides of the horizontal plate 3. At the front and rear of the bottom end of the vertical plate 4 of the motor base 1, two positioning flanges 5 are respectively provided. The lengths of the two positioning flanges 5 are different. On the installation plate 2 at the corresponding installation position, two positioning grooves 6 with different lengths are provided. The positioning groove 6 penetrates or does not penetrate the installation plate 2. By using the cooperation of the positioning flange 5 and the positioning groove 6, not only is it convenient for positioning, but also the anti-misalignment design of the positioning flanges 5 and positioning grooves 6 with different lengths can avoid the situation of the reverse installation of the motor base and the fan installation plate during the production process, improving the welding qualification rate and production efficiency.

[0023] In order to make the entire mechanism structure stable, increase the effective support area of the motor base vertical plate, and optimize the overall force structure, the vertical plate 4 and the horizontal plate 3 of the motor base 1 are connected at a right angle or an obtuse angle. Similarly, in order to avoid the overall force of the motor being concentrated on the motor base vertical plate, the included angle between the side wall and the bottom wall on the front and rear sides of the vertical plate 4 of the motor base 1 is a right angle or an acute angle.

[0024] After positioning with the positioning flange 5 and the positioning groove 6, weld their edges. Of course, in order to make the welding more firm, a flanging 7 that turns outward can be provided at the bottom of the vertical plate 4 outside the positioning flange 5 to reserve a welding position.

[0025] The positioning structure of the centrifugal fan motor base and the installation plate in the embodiment of the present invention includes arranging two groups of positioning grooves with different lengths at the installation position of the motor base, prefabricating two groups of positioning flanges corresponding to the positioning grooves on the installation plate, and optimizing the installation base from the original "several" shape to the "ㄇ" shape structure. The cooperation of the positioning flange and the positioning groove is used to complete the positioning of the installation plate and the motor base by itself; at the same time, a flanging space for welding is reserved between the positioning flanges to make up for the welding positioning defect, and the support area of the vertical plates on both sides of the installation plate is increased to enhance the stability of the installation plate.

[0026] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any change or replacement that can be thought of without creative labor should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. A positioning structure for a centrifugal fan motor base and a mounting plate, comprising a motor base (1) and a mounting plate (2), characterized in that: The motor seat (1) and the mounting plate (2) are provided with corresponding positioning structures; the positioning structure comprises a positioning flange (5) arranged at the bottom end of the motor seat (1), and a positioning groove (6) arranged on the mounting plate (2) corresponding to the positioning flange.

2. A positioning structure for a centrifugal fan motor base and a mounting plate according to claim 1, characterized in that: The motor base (1) comprises a horizontal plate (3) on the upper side and vertical plates (4) on both sides of the horizontal plate (3), and two positioning flanges (5) are respectively provided at the front and rear of the bottom end of each vertical plate (4).

3. The positioning structure of the centrifugal fan motor base and the mounting plate according to claim 1, characterized in that: The lengths of the front and rear positioning flanges (5) are different.

4. The positioning structure of the centrifugal fan motor base and the mounting plate according to claim 1, characterized in that: The included angles between the side walls and the bottom wall on the front and rear sides of the vertical plate (4) of the motor seat (1) are right angles or acute angles.

5. The positioning structure of the centrifugal fan motor base and the mounting plate according to claim 1, characterized in that: The vertical plate (4) and the horizontal plate (3) of the motor seat (1) are connected at a right angle or an obtuse angle.

6. The positioning structure of the centrifugal fan motor base and the mounting plate according to claim 1, characterized in that: The bottom of the vertical plate (4) outside the positioning flange (5) is provided with an outwardly turned folded edge (7) to reserve a welding position.

7. The positioning structure of the centrifugal fan motor base and the mounting plate according to claim 1, characterized in that: The positioning groove (6) passes through or does not pass through the installation plate (2).

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