Forward and reverse rotation judging mechanism applied to medium-voltage variable-frequency product pasting type draught fan

Abstract

The utility model discloses a mechanism for judging positive and negative rotation of a pasting type fan applied to a medium-voltage frequency conversion product, which comprises a base and a turntable, and the base is connected with the turntable through a 90-degree limiting bearing; the base and the rotating disc are each divided into four parts, the upper surface of the base is alternately coated with two different colors, and fan-shaped holes are formed in the two spaced parts of the rotating disc. The device can be simply and conveniently adhered to the rotating shaft position of a fan or a unit, and the device is visually colored when rotating forwards and is visually colored when rotating reversely, so that the forward and reverse rotation conditions of the device can be conveniently judged.

Description

Technical Field

[0001] The utility model relates to the field of on-site application and quality inspection of fans and units, and in particular to a positive and negative rotation judgment mechanism for a sticking fan used in a medium-voltage frequency conversion product. Background Art

[0002] When fans and units are used on site, simple visual observation is difficult to intuitively judge the forward and reverse rotation of the fan. Conventional forward and reverse detection methods generally rely on electrical components and control circuits, and require the modification of existing equipment, which is time-consuming and labor-intensive and cannot meet application needs well. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a positive and negative rotation judgment mechanism for a medium-voltage frequency conversion product adhesive fan.

[0004] The utility model is realized by adopting the following technical solutions.

[0005] A forward and reverse rotation judgment mechanism for a medium-voltage variable frequency product adhesive fan comprises a base and a turntable, wherein the base and the turntable are connected via a 90-degree limit bearing; the base and the turntable are both divided into four parts, the upper surface of the base is alternately filled with two different colors, and fan-shaped holes are formed on the two interval parts of the turntable.

[0006] Furthermore, the 90-degree limit bearing includes a bearing inner ring and a bearing outer ring, an arc-shaped limit groove is formed on the outer side of the bearing inner ring, and the central angle of the arc-shaped limit groove is 90°; a stop block is provided on the inner edge of the bearing outer ring, and the stop block is embedded in the limit groove.

[0007] Furthermore, a bearing seat is provided in the center of the base, and the outer ring of the 90-degree limit bearing is fastened in the bearing seat.

[0008] Furthermore, the turntable is fixed on the inner ring of the 90-degree limit bearing.

[0009] Furthermore, an adhesive layer is provided on the bottom surface of the base.

[0010] The utility model achieves the following beneficial effects.

[0011] The utility model can quickly judge the rotation direction of the fan, unit and other equipment by visual observation, and the base can simply and quickly fix the entire device on the rotating shaft position of the fan and unit through the adhesive layer, which is easy to install. The utility model has a simple design, good use effect, strong practicality and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a structural schematic diagram of a 90-degree limit bearing of the utility model.

[0014] Among them, 1. 90 degree limit bearing; 11. bearing inner ring; 111. limit groove; 12. bearing outer ring; 121. stopper; 2. base; 3. bearing seat; 4. turntable; 41. fan-shaped hole. DETAILED DESCRIPTION

[0015] The technical solution of the utility model will be clearly and completely described below through specific implementation methods.

[0016] like Figure 1-2 As shown, a positive and negative rotation judgment mechanism for a medium-voltage variable frequency product adhesive fan mainly includes a 90-degree limit bearing 1, a base 2, a bearing seat 3, and a turntable 4.

[0017] The 90-degree limit bearing 1 comprises a bearing inner ring 11 and a bearing outer ring 12. An arc-shaped limit groove 111 is formed on the outer side of the bearing inner ring 11, and the arc-shaped limit groove 111 has a central angle of 90°. A stopper 121 is provided on the inner edge of the bearing outer ring 12, and the stopper 121 is embedded in the limit groove 111, so that the bearing can only reciprocate within a range of 90 degrees.

[0018] A bearing seat 3 is provided at the center of the base 2, and the outer ring 12 of the 90-degree limit bearing 1 is fastened in the bearing seat 3; the turntable 4 is fixed to the inner ring 11 of the 90-degree limit bearing 1, so that the turntable 4 can reciprocate within a range of 90 degrees with the inner ring 11 of the bearing.

[0019] The base 2 and the turntable 4 are divided into four parts, each of which is in the shape of a sector with a central angle of 90°. Two different colors, preferably red and blue, are alternately painted on the upper surfaces of the four parts of the base 2. At the same time, a penetrating sector-shaped hole 41 is formed on two non-adjacent parts of the turntable 4, and the color on the base 2 can be observed through the sector-shaped hole 41. When rotating forward, the 90-degree limit bearing 1 rotates forward to the bottom, and the sector-shaped hole 41 of the turntable 4 is aligned with the red part of the base 2; when reversing, the 90-degree limit bearing 1 rotates reversely to the bottom, and the sector-shaped hole 41 of the turntable 4 is aligned with the blue part of the base 2. That is, when rotating forward, it is visually seen as red, and when reversing, it is visually seen as blue, thereby judging the forward and reverse rotation of the equipment.

[0020] The present application also has an adhesive layer on the bottom surface of the base 2. After the release paper is torn off, the utility model can be simply and conveniently pasted on the rotating shaft of the fan or unit.

[0021] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the technical requirements.

Claims

1. A positive and negative rotation judgment mechanism for a medium-voltage variable frequency product adhesive fan, characterized in that: The invention comprises a base (2) and a turntable (4), wherein the base (2) and the turntable (4) are connected via a 90-degree limit bearing (1); the base (2) and the turntable (4) are both divided into four parts, the upper surface of the base (2) is alternately painted with two different colors, and fan-shaped holes (41) are formed on two separated parts of the turntable (4).

2. According to claim 1, a positive and negative rotation judgment mechanism for a medium-voltage variable frequency product adhesive fan, characterized in that: The 90-degree limit bearing (1) comprises a bearing inner ring (11) and a bearing outer ring (12); an arc-shaped limit groove (111) is formed on the outer side of the bearing inner ring (11); the arc-shaped limit groove (111) subtends a central angle of 90°; a stop block (121) is provided on the inner edge of the bearing outer ring (12); the stop block (121) is embedded in the limit groove (111).

3. According to claim 1, a positive and negative rotation judgment mechanism for a medium-voltage variable frequency product adhesive fan, characterized in that: A bearing seat (3) is provided in the center of the base (2), and the bearing outer ring (12) of the 90-degree limit bearing (1) is fastened in the bearing seat (3).

4. According to claim 1, a positive and negative rotation judgment mechanism for a medium-voltage variable frequency product adhesive fan, characterized in that: The rotating disk (4) is fixed on the bearing inner ring (11) of the 90-degree limit bearing (1).

5. According to claim 1, a positive and negative rotation judgment mechanism for a medium-voltage variable frequency product adhesive fan, characterized in that: The bottom surface of the base (2) is provided with an adhesive layer.

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