Motor shaft structure

Abstract

The utility model relates to a motor shaft structure, which comprises a shaft body, the end part of the shaft body is a flat square part, the radial width of the flat square part is smaller than the diameter of the shaft body, a step surface is formed between the flat square part and the shaft body, the end part of the shaft body is also provided with a notch, the side surface of the notch is parallel to the step surface, and the side surface of the notch is provided with a groove. The side face of the notch serves as a shaft stress point. The end part of the shaft body is provided with a wire outlet, the end part of the flat square part is provided with a groove, and the wire outlet extends to be in contact with the groove. Compared with the prior art, the notch is formed in the shaft body, and the side face of the notch serves as a shaft stress point, so that the shaft stress point and the step face which is a weak strength point are staggered, and the actual use strength of the shaft is improved; the end part of the flat square part is provided with the groove, the side surface of the cable enters the groove, and the diameter of the overlapped cable and the flat square part is reduced by the groove, namely, the outer diameter of the cable which can be assembled in the bearing is enlarged, so that the normal assembly of the bearing is facilitated.

Description

Technical Field

[0001] The utility model relates to a motor shaft structure and belongs to the technical field of motors. Background Art

[0002] The motor includes a motor shaft, the end of which is usually smaller in diameter than the middle of the motor shaft and has a flat square. The existing motor shaft is easily damaged and broken, mainly because the step surface between the flat square and the motor shaft is usually the weakest part of the motor shaft, but this part happens to be the stress point of the motor shaft, so this part is often damaged and broken, resulting in the scrapping of the motor shaft. Utility Model Content

[0003] The utility model aims to provide a motor shaft which can improve the actual use strength of the shaft by staggering the shaft force point and the step surface, which is a weak point in strength, in view of the shortcomings of the prior art.

[0004] To achieve the purpose, the technical solution adopted by the utility model is:

[0005] A motor shaft structure includes a shaft body, wherein the end of the shaft body is a flat square portion, the radial width of the flat square portion is smaller than the diameter of the shaft body, a step surface is formed between the flat square portion and the shaft body, and the end of the shaft body is also provided with a notch, the side surface of the notch is arranged parallel to the step surface, and the side surface of the notch serves as a shaft force point.

[0006] As a further optimization of the above technical solution: a wire outlet is formed at the end of the shaft body, a groove is formed at the end of the flat square portion, and the wire outlet extends to contact the groove.

[0007] As a further optimization of the above technical solution: an end cover is installed at the end of the shaft body, a mounting hole is formed on the end cover, a bearing is arranged in the mounting hole, the cable extends from the outlet, the side of the cable enters the groove, the diameter of the cable and the flat square part after overlapping is smaller than the inner hole diameter of the bearing, and the cable and the flat square part pass through the inner hole of the bearing.

[0008] As a further optimization of the above technical solution: a guiding slope is formed on the end of the shaft body close to the flat square portion.

[0009] Compared with the prior art, the utility model has a notch on the shaft body, and the side of the notch serves as the stress point of the shaft, thereby staggering the stress point of the shaft from the step surface, which is a weak point in strength, and improving the actual use strength of the shaft; a groove is formed at the end of the flat square part, and the side of the cable enters the groove. The groove reduces the diameter of the cable after overlapping with the flat square part, that is, the outer diameter of the cable that can be assembled in the bearing is enlarged, which is convenient for the normal assembly of the bearing; a guide slope is also formed on the shaft body, which plays a guiding role in the installation of the end cover, so that the end cover is convenient for being installed on the shaft body. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0011] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0012] Figure 3 It is a structural schematic diagram of the utility model when it is located in the motor. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. Figure 1-3 As shown, a motor shaft structure includes a shaft body 1, the end of the shaft body 1 is a flat square portion 2, the radial width of the flat square portion 2 is smaller than the diameter of the shaft body 1, and a step surface 3 is formed between the flat square portion 2 and the shaft body 1. A notch 4 is also provided at the end of the shaft body 1, and the side of the notch 4 is arranged parallel to the step surface 3, and the side of the notch 4 serves as a shaft force point. The step surface 3 is a weak point on the shaft, and the notch 4 makes the shaft force point staggered with the step surface 3, thereby improving the actual use strength of the shaft.

[0014] In the above technical solution: the end of the shaft body 1 is formed with a wire outlet 11, and the end of the flat square part 2 is formed with a groove 21, and the wire outlet 11 extends to contact with the groove 21. The end of the shaft body 1 is installed with an end cover 5, and the end cover 5 is formed with a mounting hole, and a bearing is arranged in the mounting hole. The cable 6 extends from the wire outlet 11, and the side of the cable 6 enters the groove 21. The cable 6 and the flat square part 2 need to pass through the inner hole of the bearing, that is, it is necessary to ensure that the diameter of the cable 6 and the flat square part 2 after overlapping is smaller than the diameter of the inner hole of the bearing; and the groove 21 on the flat square part 2 reduces the diameter of the cable 6 and the flat square part 2 after overlapping, that is, the outer diameter of the cable 6 that can be assembled in the bearing is expanded, which is convenient for normal assembly of the bearing.

[0015] In the above technical solution: the end of the shaft body 1 close to the flat square portion 2 is formed with a guiding inclined surface 12, which plays a guiding role in the installation of the end cover 5 and facilitates the end cover 5 to be installed on the shaft body 1.

[0016] The preferred specific embodiments of the present utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the present utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should fall within the protection scope of the present utility model.

Claims

1. A motor shaft structure, comprising a shaft body (1), wherein the end of the shaft body (1) is a flat square portion (2), the radial width of the flat square portion (2) is smaller than the diameter of the shaft body (1), and a step surface (3) is formed between the flat square portion (2) and the shaft body (1), characterized in that The end of the shaft body (1) is also provided with a notch (4), the side surface of the notch (4) is arranged parallel to the step surface (3), and the side surface of the notch (4) serves as an axial force point.

2. A motor shaft structure according to claim 1, characterized in that The end of the shaft body (1) is formed with a wire outlet (11), the end of the flat square portion (2) is formed with a groove (21), and the wire outlet (11) extends to contact the groove (21).

3. A motor shaft structure according to claim 2, characterized in that An end cover (5) is installed at the end of the shaft body (1), and a mounting hole is formed on the end cover (5). A bearing is arranged in the mounting hole. The cable (6) extends from the outlet (11), and the side of the cable (6) enters the groove (21). The diameter of the cable (6) and the flat square part (2) after overlapping is smaller than the inner hole diameter of the bearing. The cable (6) and the flat square part (2) pass through the inner hole of the bearing.

4. A motor shaft structure according to claim 1, characterized in that The end of the shaft body (1) close to the flat square portion (2) is provided with a guiding inclined surface (12).

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