Light motor shaft

Abstract

The light motor shaft comprises a main shaft tube, end shafts and an inner core tube, coupling teeth are arranged at the two ends of the main shaft tube, the end shafts are symmetrically arranged at the two ends of the main shaft tube, coupling plugs meshed with the coupling teeth are arranged on the surfaces of the end shafts, and the two ends of the inner core tube are fixedly connected to the inner sides of the two end shafts in a sleeved mode. And the inner core pipe penetrates through the inner side of the main shaft pipe. In the embodiment, the weight is effectively reduced through the design of the double-layer hollow structure, meanwhile, the strength of the shaft body is enhanced, the inner wall of the shaft body is provided with the double-spiral prismatic structure, and the torsion resistance and the stability are improved. The cooling channels are arranged at the two ends, effective heat dissipation can be achieved through air inflow or cooling liquid input, and it is ensured that the motor shaft is kept at the low temperature in the working process. In addition, the connecting parts at the two ends of the shaft body are detachably designed in an interference fit mode, and later maintenance and replacement are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of motor shafts, in particular to a lightweight motor shaft. Background Art

[0002] Currently, most traditional motor shafts use a single solid structure, usually machined from metal materials such as steel or alloy steel. These traditional motor shaft structures are relatively heavy, and due to their single design, they can result in higher mass and lower heat dissipation efficiency. To improve motor performance, traditional technologies often require increasing the diameter or thickness of the motor shaft to enhance its strength, but this practice significantly increases the weight of the shaft and negatively impacts the overall performance of the motor. In addition, traditional motor shaft heat dissipation primarily relies on external cooling devices such as fans or water cooling systems. However, due to the lack of effective built-in heat dissipation design, these traditional solutions often fail to fully utilize the heat dissipation effect, potentially causing the motor to overheat, thereby affecting its operating efficiency and service life.

[0003] Disadvantages of traditional technical solutions:

[0004] Heavy Mass: Traditional motor shafts are typically solid, resulting in a heavy shaft mass that affects the motor's overall efficiency and performance. This heavier shaft increases the motor's inertia, which can affect efficiency and accuracy, especially at high speeds.

[0005] Poor heat dissipation: Traditional motor shaft designs lack built-in heat dissipation structures and typically rely on external cooling systems to reduce temperatures. This approach not only adds additional size and weight, but also has limited effectiveness. External cooling systems cannot effectively handle heat buildup under high load conditions, easily leading to motor overheating and reducing efficiency and service life.

[0006] Insufficient structural strength: Traditional motor shafts are typically strengthened by increasing the thickness of the shaft material. However, this approach increases weight without effectively improving the motor's torsional resistance and stability. During high-speed operation, insufficient shaft strength can cause deformation or damage, impacting the motor's stability and durability.

[0007] In view of this, research and improvement are carried out on the existing problems, and a lightweight motor shaft is provided to solve the current problems. The purpose is to achieve the purpose of solving the problems and improving the practical value through this technology. Utility Model Content

[0008] The utility model aims to solve the technical problems existing in the prior art or related technologies.

[0009] The utility model relates to a lightweight motor shaft, which mainly includes a main shaft tube, an end shaft and an inner core tube. The two ends of the main shaft tube are provided with coupling teeth, and the end shafts are symmetrically arranged at the two ends of the main shaft tube. The surface of the end shaft is provided with a coupling plug that meshes with the coupling teeth. The two ends of the inner core tube are fixedly sleeved on the inner sides of the two end shafts. The inner core tube passes through the inner side of the main shaft tube. The inner side of the main shaft tube is provided with reinforcing ribs. The reinforcing ribs are double-helix ridges, and the double helixes rotate in opposite directions. The double-layer hollow structure formed by the main shaft tube and the inner core tube can significantly reduce the mass of the motor shaft. At the same time, the heat dissipation of the main shaft tube and the inner core tube is achieved by the design of the two ends of the inner core tube, thereby ensuring the stability of the motor shaft under high-load operation.

[0010] In a preferred embodiment, the present invention can be further configured such that the spindle tube and reinforcing ribs are integrally cast, with the ribs being thicker than the wall thickness of the spindle tube. The spindle tube is made of alloy steel. This integral casting of the spindle tube and reinforcing ribs ensures high precision and strength of the overall structure, further enhancing the stability and durability of the motor shaft, particularly its reliability under high load conditions.

[0011] In a preferred embodiment, the present invention can be further configured as follows: a gap is provided between the inner wall of the spindle tube and the outer periphery of the inner core tube, and a plurality of heat dissipation holes are provided on the surface of the inner core tube, and the heat dissipation holes are evenly distributed in a spiral shape. Specifically, a double-layer hollow structure of the spindle tube and the inner core tube is adopted to reduce the shaft mass and strengthen the motor shaft strength, and the spindle tube and the inner core tube are cooled by air intake or cooling liquid input at both ends of the inner core tube. By forming a gap between the inner wall of the spindle tube and the outer periphery of the inner core tube and designing a plurality of heat dissipation holes in a spiral shape, the heat dissipation channel function can be effectively realized, ensuring the cooling effect and heat dissipation performance of the shaft body.

[0012] In a preferred embodiment, the present invention can be further configured such that the reinforcing ribs are double helical ribs arranged in opposite directions, and the double helical ribs are arranged in an interlaced manner. The double helical rib design and opposite helical arrangement of the reinforcing ribs not only enhance the torsional resistance of the motor shaft, but also effectively improve the overall strength and structural stability, making it particularly suitable for high-load operating scenarios.

[0013] In a preferred embodiment, the present invention can be further configured such that the coupling teeth at both ends of the main shaft tube interlock with the coupling plug, and a ferrule is removably sleeved around the outer periphery of the coupling teeth and the coupling plug, with the inner side of the ferrule interferingly abutting against the surfaces of the coupling teeth and the coupling plug. By designing the coupling teeth and the coupling plug to interlock with each other and sleeved around their outer periphery, convenient assembly and disassembly of the motor shaft ends is achieved, ensuring connection stability during operation and enhancing ease of maintenance and replacement.

[0014] In a preferred example, the present invention can be further configured as follows: the gap between the inner wall of the reinforcing rib and the outer wall of the inner core tube is 1mm to 5mm, and the gap is used to form an air or liquid flow channel to provide effective heat exchange and cooling effects, which not only enhances the heat dissipation capacity of the motor shaft, but also further improves the overall heat resistance of the shaft body, ensuring long-term stable operation.

[0015] The beneficial effects achieved by the utility model are:

[0016] 1. In this utility model, the double-layer hollow structure of the main shaft tube and inner core tube effectively reduces the mass of the motor shaft while enhancing its strength. In addition, the use of air intake or coolant input at both ends of the inner core tube can effectively dissipate heat from the main shaft tube and inner core tube, thereby improving the heat dissipation performance of the motor shaft.

[0017] 2. In the utility model, by arranging double-helix prismatic structural reinforcement ribs in the main shaft tube and making the double helix rotate in opposite directions, the structural strength of the motor shaft is improved, and its anti-torsion ability is also enhanced, thereby effectively improving the stability and durability of the motor shaft. The main shaft tube and the reinforcement ribs are integrally cast and formed to ensure the high precision and strength of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the exploded structure of an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the internal perspective structure of the spindle tube according to one embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the main shaft tube structure of an embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the end shaft and inner core tube structure of an embodiment of the present utility model.

[0023] Reference numerals:

[0024] 100, main shaft tube; 110, coupling teeth; 120, reinforcing ribs; 200, end shaft; 210, coupling plug; 300, inner core tube; 310, heat dissipation holes; 400, ferrule. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other unless there is any conflict.

[0026] It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0027] The following is combined with Figure 1-Figure 5 Description Some embodiments of the present invention provide a lightweight motor shaft, which is mainly composed of a main shaft tube 100, an end shaft 200, and an inner core tube 300. The specific implementation method is described in detail according to the structure described in the following claims.

[0028] The spindle tube 100 is a hollow structure, with coupling teeth 110 at each end. End shafts 200 are symmetrically arranged at either end of the spindle tube 100, and each end is provided with a coupling plug 210 that engages with the coupling teeth 110. The inner core tube 300 is a hollow shaft, with its ends fixedly sleeved onto the inside of the two end shafts 200 and extending through the inside of the spindle tube 100. Reinforcement ribs 120 are provided on the inner wall, forming a double-helix prism-like structure with opposite helical rotations.

[0029] The aforementioned structure utilizes a double-layer hollow design of the spindle tube 100 and the inner core tube 300, which reduces the overall mass of the motor shaft while enhancing its strength. Furthermore, the introduction of air or coolant at both ends of the inner core tube 300 dissipates heat from the spindle tube 100 and the inner core tube 300, preventing the motor shaft from overheating and affecting its performance.

[0030] In this embodiment, the spindle tube 100 and the reinforcing ribs 120 are integrally cast, with the thickness of the ribs 120 exceeding the wall thickness of the spindle tube 100, which is made of alloy steel. Using integral casting technology, the spindle tube 100 and the reinforcing ribs 120 are integrated into a single unit, ensuring structural stability and precision. In particular, the thicker wall design of the reinforcing ribs 120 enhances the durability and torsional resistance of the motor shaft under high loads.

[0031] In this embodiment, the inner wall of the main shaft tube 100 and the inner core tube 300 periphery are provided with a gap, and the inner core tube 300 surface is provided with several heat dissipation holes 310. These heat dissipation holes 310 are evenly distributed in a spiral shape. In specific implementation, the double-layer hollow structure of the main shaft tube 100 and the inner core tube 300 is adopted to reduce the quality of the shaft, and the heat dissipation function is realized by the mode of air intake or inputting coolant at the two ends of the inner core tube 300. The design of the gap and the heat dissipation hole 310 spiral passages can not only effectively reduce the weight of the motor shaft, but also effectively reduce the shaft body temperature by the flow of air or coolant, ensuring the stable operation of the motor. This design plays an important role in improving heat dissipation efficiency and prolonging service life.

[0032] In this embodiment, the reinforcing ribs 120 are double helical ribs arranged in opposite directions, and the double helical ribs are staggered. This design ensures that the motor shaft has excellent torsional resistance under torsional loads. At the same time, the staggered arrangement of the double helical ribs can increase the rigidity of the shaft, improve the overall strength, and prevent damage caused by overload.

[0033] In this embodiment, the coupling teeth 110 at both ends of the main shaft tube 100 interlock with the coupling plug 210. A ferrule 400 is removably attached to the outer peripheries of the coupling teeth 110 and the coupling plug 210. The inner side of the ferrule 400 is in interference fit with the surfaces of the coupling teeth 110 and the coupling plug 210. This staggered engagement of the coupling teeth 110 and the coupling plug 210, with the ferrule 400 attached to their outer peripheries, ensures a secure and stable connection. Furthermore, the detachable design of the ferrule 400 facilitates repair and replacement, making maintenance of the motor shaft more convenient and efficient.

[0034] In this embodiment, the gap between the inner wall of the reinforcing rib 120 and the outer wall of the inner core tube 300 is 1mm to 5mm, and this gap is used to form an air or liquid flow channel to provide effective heat exchange and cooling. Providing a 1mm to 5mm gap between the reinforcing rib 120 and the inner core tube 300 and utilizing the air or liquid flow channel for heat exchange not only increases the heat dissipation area but also effectively reduces operating temperature, thereby improving the long-term operational stability and reliability of the motor shaft.

[0035] In this embodiment, the motor shaft is primarily used in conventional motor applications. Specifically, the spindle tube 100 is made of alloy steel to ensure the shaft's strength and durability. The reinforcing ribs 120 are a double-helical prismatic structure, integrally cast with the spindle tube 100 to enhance torsional resistance and load-bearing capacity.

[0036] In this design, a gap exists between the inner wall of the inner core tube 300 and the outer wall of the spindle tube 100. This gap is used to install a coolant pipe, ensuring the heat dissipation effect of the shaft. A plurality of heat dissipation holes 310 are designed to guide the coolant to flow inside the shaft, thereby effectively reducing the operating temperature of the shaft.

[0037] The coupling teeth 110 and the coupling plug 210 are connected to the ferrule 400 through interference fit, ensuring a stable connection at both ends and avoiding vibration and loosening.

[0038] This embodiment can ensure high strength and low temperature operation of the shaft under normal motor workload, thereby improving the overall performance and service life of the motor.

[0039] In another embodiment, the motor shaft is primarily used in high-load, high-power motor applications. A double-layer hollow design of the main shaft tube 100 and the inner core tube 300 is adopted to reduce the mass of the motor shaft, and efficient heat dissipation is achieved by air intake or coolant input at both ends of the inner core tube 300.

[0040] The reinforcing ribs 120 are double helical ribs arranged in opposite directions, which increase the rigidity and torsional resistance of the shaft and ensure stable operation of the motor under high load.

[0041] The interference fit between the coupling teeth 110 and the coupling plug 210 is realized by the ferrule 400 to achieve a detachable design, which is convenient for later maintenance and replacement.

[0042] This embodiment can operate stably under high load and high temperature environments, and the cooling system effectively prevents the shaft from overheating, thereby enhancing the working efficiency and service life of the motor.

[0043] Through the above embodiments, the design of the utility model can adapt to the needs of different application scenarios and provide a motor shaft solution with high strength, low temperature operation and convenient maintenance.

[0044] Throughout this specification, terms such as "one embodiment," "some embodiments," or "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0045] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lightweight motor shaft, characterized in that: include: A main shaft tube (100), an end shaft (200) and an inner core tube (300), wherein the two ends of the main shaft tube (100) are provided with coupling teeth (110), and the end shafts (200) are symmetrically arranged at the two ends of the main shaft tube (100), and the surface of the end shaft (200) is provided with a coupling plug (210) engaged with the coupling teeth (110), and the two ends of the inner core tube (300) are fixedly sleeved on the inner sides of the two end shafts (200), and the inner core tube (300) passes through the inner side of the main shaft tube (100), and the inner side of the main shaft tube (100) is provided with a reinforcing rib (120), and the reinforcing rib (120) is double-helix ribbed, and the double helix has opposite rotation directions.

2. A lightweight motor shaft according to claim 1, characterized in that: The main shaft tube (100) and the reinforcing rib (120) are an integrally cast structure, and the thickness of the reinforcing rib (120) is greater than the wall thickness of the main shaft tube (100). The main shaft tube (100) is a component made of alloy steel.

3. The lightweight motor shaft according to claim 1, characterized in that: A gap is provided between the inner wall of the main shaft tube (100) and the outer periphery of the inner core tube (300), and a plurality of heat dissipation holes (310) are provided on the surface of the inner core tube (300), and the heat dissipation holes (310) are evenly distributed in a spiral shape.

4. The lightweight motor shaft according to claim 1, characterized in that: The reinforcing ribs (120) are double helical ribs arranged in opposite directions, and the double helical ribs are arranged in an interlaced manner.

5. The lightweight motor shaft according to claim 1, characterized in that: The coupling teeth (110) at both ends of the main shaft tube (100) are interlaced with the coupling plug (210), and the outer peripheries of the coupling teeth (110) and the coupling plug (210) are detachably sleeved with a ferrule (400), and the inner side of the ferrule (400) is in interference contact with the surfaces of the coupling teeth (110) and the coupling plug (210).

6. The lightweight motor shaft according to claim 1, characterized in that: The gap between the inner wall of the reinforcing rib (120) and the outer wall of the inner core tube (300) is 1 mm to 5 mm, and the gap is used to form an air or liquid flow channel to provide effective heat exchange and cooling effects.

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