Motor shaft structure

Abstract

The utility model discloses a motor shaft structure, including the axle body, the middle part of axle body is equipped with the hollow hole, one end of axle body is equipped with the mounting hole, the mounting hole is linked together with the hollow hole, the surface of axle body is equipped with the vent hole, the vent hole is linked together with hollow hole, realize the lightweight of product through above -mentioned structure and improve the heat dissipation effect of system, not only significantly reduce the moment of inertia, and improve the power of motor, reduce the temperature of product, improve the service life of product.

Description

Technical Field

[0001] This utility model belongs to the field of motor equipment technology, and specifically relates to a motor shaft structure. Background Technology

[0002] The motor shaft of the stepped shaft motor adopts a stepped shaft structure, with a larger diameter in the middle and gradually decreasing diameter at both ends. This structure not only meets the installation requirements of different shaft sections for components, but also optimizes material utilization and processing efficiency. Each step diameter corresponds to different load requirements. The thicker middle section is used to transmit the main torque, while the thinner sections at both ends are suitable for light loads or special fitting parts, avoiding material waste and improving overall strength.

[0003] Modern stepped shafts generally use a solid shaft design, which results in a large moment of inertia, easy heat buildup, poor continuous working ability, and a short service life for the motor shaft. Utility Model Content

[0004] The purpose of this invention is to provide a motor shaft structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A motor shaft structure includes a shaft body, a hollow hole in the middle of the shaft body, a mounting hole at one end of the shaft body that communicates with the hollow hole, and a ventilation hole on the surface of the shaft body that communicates with the hollow hole.

[0007] By adopting the above technical solution, the hollow hole can greatly reduce the weight of the product, realize the lightweighting of the equipment, and through connection with the external ventilation hole, the motor heat dissipation efficiency can be significantly improved by utilizing external air cooling and self-circulating heat dissipation during operation.

[0008] Preferably, a connecting hole is provided at the end of the shaft away from the mounting hole.

[0009] By adopting the above technical solution: the connecting hole is used when parts need to be connected, such as threaded connection or coupling connection.

[0010] Preferably, the inner wall of the hollow hole is provided with a flow guide groove.

[0011] By adopting the above technical solution, the airflow channel can further improve the efficiency of airflow, thereby improving the efficiency of heat dissipation.

[0012] Preferably, the cross-sectional shape of the ventilation hole is circular, elliptical, or elongated.

[0013] By adopting the above technical solutions, different shapes are designed according to different product requirements, thereby further improving heat dissipation efficiency.

[0014] Preferably, the shaft includes a connecting section, a ventilation section, and an output section in sequence, and the ventilation hole is opened in the middle of the ventilation section.

[0015] By adopting the above technical solution: the connecting section is connected to the motor through the mounting hole, the ventilation hole of the ventilation section connects the hollow hole to the outside, and the output section connects different parts.

[0016] Preferably, the output segment is arranged in a stepped manner.

[0017] By adopting the above technical solution, the stepped output sections facilitate the processing of different parts.

[0018] The technical effects and advantages of this utility model are as follows:

[0019] This product reduces its weight through hollow holes, achieving lightweight design. Furthermore, the combination of hollow holes and ventilation holes effectively improves heat dissipation, increases power output, and ensures product lifespan. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0021] Figure 2 This is a schematic diagram of the overall structure of Example 2.

[0022] In the diagram: 1. Shaft; 2. Hollow hole; 3. Ventilation hole; 4. Mounting hole; 5. Guide groove; 6. Connecting section; 7. Ventilation section; 8. Output section; 9. Connecting hole. Detailed Implementation

[0023] The following will refer to the appendix in the embodiments of this utility model. Figures 1-2 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The specific embodiments described herein are merely used to explain this utility model and are not intended to limit this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Example 1:

[0025] like Figure 1As shown, this utility model provides a motor shaft structure, including a shaft body 1, a hollow hole 2 in the middle of the shaft body 1, a mounting hole 4 at one end of the shaft body 1, the mounting hole 4 communicating with the hollow hole 2, and a ventilation hole 3 on the surface of the shaft body 1, the ventilation hole 3 communicating with the hollow hole 2. The hollow hole 2 can greatly reduce the weight of the product, realize the lightweighting of the equipment, and through the connection with the external ventilation hole 3, during the operation, the external air cooling is utilized, combined with self-circulating heat dissipation, which significantly improves the heat dissipation efficiency of the motor.

[0026] The inner wall of the hollow hole 2 is provided with a flow guide groove 5, which can further improve the efficiency of air flow, thereby improving the efficiency of heat dissipation.

[0027] The cross-sectional shape of the ventilation hole 3 is circular, elliptical, or elongated, and can be designed into different shapes according to different product requirements to further improve heat dissipation efficiency.

[0028] The shaft 1 includes a connecting section 6, a ventilation section 7, and an output section 8 in sequence. The ventilation hole 3 is opened in the middle of the ventilation section 7. The connecting section 6 is connected to the motor through the mounting hole 4. The ventilation hole 3 of the ventilation section 7 connects the hollow hole 2 to the outside. The output section 8 connects different parts.

[0029] The output section 8 is arranged in a stepped shape, which facilitates the processing of different parts.

[0030] According to Bernoulli's principle, when a fluid flows at the same height, the greater the velocity, the lower the pressure. When the shaft 1 rotates at high speed during rotor operation, the air pressure at the hollow hole 2 is lower than the air pressure around the outer diameter of the shaft. Due to the pressure difference, air will flow from the outside of the shaft 1 into the hollow hole 2. Furthermore, because the pressure is low in the high-speed rotating area of ​​the shaft wall and high in the low-speed area of ​​the shaft center, air is driven to flow from the shaft center to the shaft wall.

[0031] The airflow inside the hollow hole 2 is also thrown towards the shaft wall due to centrifugal force. Under the action of the Coanda effect, the airflow flows steadily along the shaft wall and flows outward from the ventilation hole 3 and the shaft opening. When the airflow flows out, it can absorb some of the heat generated during the operation of the rotor, thereby reducing the rotor temperature.

[0032] The ventilation hole 3 can accelerate the airflow discharge, directly remove the rotor heat and reduce the temperature rise. In addition, the ventilation hole 3 located on the side wall can avoid the airflow dead zone caused by opening the ventilation hole 3 at the end. At the same time, the ventilation hole 3 should not be covered by other parts.

[0033] Example 2:

[0034] The difference between this embodiment and embodiment 1 is that: a connecting hole 9 is provided at the end of the shaft 1 away from the mounting hole 4. The connecting hole 9 is used when parts need to be connected, such as threaded connection or coupling connection.

[0035] In summary, this product features high heat dissipation efficiency, lightweight design, and long service life.

[0036] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A motor shaft structure, characterized in that: The shaft (1) includes a hollow hole (2) in the middle and a mounting hole (4) at one end. The mounting hole (4) is connected to the hollow hole (2). A ventilation hole (3) is provided on the surface of the shaft (1) and is connected to the hollow hole (2).

2. The motor shaft structure according to claim 1, characterized in that: A connecting hole (9) is provided at one end of the shaft (1) away from the mounting hole (4).

3. The motor shaft structure according to claim 1, characterized in that: The hollow hole (2) has a flow guide groove (5) on its inner wall.

4. The motor shaft structure according to claim 1, characterized in that: The cross-sectional shape of the ventilation hole (3) is circular, elliptical or elongated.

5. The motor shaft structure according to claim 1, characterized in that: The shaft (1) includes a connecting section (6), a ventilation section (7) and an output section (8) in sequence, and the ventilation hole (3) is opened in the middle of the ventilation section (7).

6. A motor shaft structure according to claim 5, characterized in that: The output segment (8) has a stepped structure.

Images