A motor rotating shaft

Abstract

The utility model relates to motor rotating shaft technical field, concretely is a kind of motor rotating shaft, including rotating shaft A, the inside of rotating shaft A is provided with several through holes that penetrate its own and be spiral, the inner wall of through hole is fixedly installed with several heat dissipation fins, and the material of heat dissipation fin is aluminium alloy;One end of rotating shaft A is fixedly connected with air outlet cylinder, and its cavity is connected with the end of through hole;The other end of rotating shaft A is provided with rotating shaft B.The motor rotating shaft, by being provided with several through holes that penetrate its own and be spiral in the inside of rotating shaft A, to further realize in the process of rotating shaft A rotation, air can enter the inside of through hole, to further cool rotating shaft A, by the outlet direction of air outlet cylinder deviates from the radial direction of rotating shaft A, and central tangent is tangent with the normal rotation direction of rotating shaft A, can effectively prevent the air from through hole, backflow to the inside of through hole.

Description

Technical Field

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

[0002] A motor shaft is a type of shaft used for transmission, outputting the rotation of a motor. Motor shafts can be used to connect various bushings and equipment, and can also be fixedly welded to other devices, ensuring that the device can rotate after being connected via the motor shaft.

[0003] Currently, common motor shafts typically employ a solid structure, which is prone to overheating during operation due to the inherent properties of the material. This not only affects motor efficiency but also significantly shortens the shaft's lifespan. Furthermore, when a section of the shaft (such as shaft A, shaft B, or shaft C) experiences severe wear and requires replacement, the existing installation structure is often quite complex, leading to cumbersome disassembly and replacement processes, inconvenient maintenance, and increased equipment downtime and maintenance costs. Therefore, there is an urgent need for a motor shaft to address these issues. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to provide a motor shaft to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, one embodiment of this utility model provides a motor shaft, including a shaft A, wherein the shaft A has multiple spiral through holes running through it; a plurality of heat dissipation fins are fixedly installed on the inner wall of the through holes, the heat dissipation fins being made of aluminum alloy; one end of the shaft A is fixedly connected to an air outlet, the cavity of which communicates with the end of the through holes; the other end of the shaft A is provided with a shaft B, the shaft B having an installation cavity inside, a bidirectional spring rod being fixedly installed inside the installation cavity, both output ends of the bidirectional spring rod being fixedly connected to a transmission slider, and an L-shaped limiting plate being vertically fixed on the side of the transmission slider away from the bidirectional spring rod.

[0007] The present invention is further configured such that: the end of the rotating shaft B away from the rotating shaft A is connected to the rotating shaft C; the rotating shaft C has a slot and a guide slot inside, the slot being adapted to the limiting plate; the corresponding end face of the rotating shaft B has two sliding holes, each of the mounting cavities being interconnected.

[0008] By adopting the above technical solution, the installation cavity is interconnected, which facilitates the connection of the limiting plate to the inside of the slot.

[0009] The present invention is further configured such that: a plurality of guide blocks are symmetrically installed on the outer side of the rotating shaft B, the cross-section of the guide block is trapezoidal, and the guide groove is a trapezoidal annular groove adapted to the shape of the guide block; the guide block is made of high carbon chromium bearing steel and is subjected to quenching and low temperature tempering treatment.

[0010] By adopting the above technical solution, the guide groove is a trapezoidal annular groove that matches the shape of the guide block, which can effectively prevent the connection from automatically disengaging under vibration or torque fluctuation.

[0011] The present invention is further configured such that: the outlet direction of the air outlet cylinder is deviated from the radial direction of the rotating shaft A, and its central tangent is tangent to the normal rotation direction of the rotating shaft A; the air outlet cylinder is integrally formed by precision casting of aluminum alloy with high thermal conductivity.

[0012] By adopting the above technical solution, the outlet direction of the air outlet is deviated from the radial direction of the rotating shaft A, which can quickly discharge the air inside the through hole and avoid backflow.

[0013] The present invention is further configured such that: the heat dissipation fins on the inner wall of the through hole extend along their spiral direction; the surface of the heat dissipation fins is subjected to micro-arc oxidation treatment to generate a ceramic layer.

[0014] By adopting the above technical solution, the surface of the heat dissipation fins is subjected to micro-arc oxidation treatment, which enhances the wear resistance of the heat dissipation fins.

[0015] The present invention is further configured such that: an annular baffle is provided at the connection between the rotating shaft A and the motor housing; the baffle is fixedly installed on the rotating shaft B and rotates together with it; the diameter of the baffle is larger than the diameter of the rotating shaft A.

[0016] By adopting the above technical solution, an annular baffle is provided at the connection between the rotating shaft A and the motor housing. The baffle forms a physical barrier, which can effectively prevent dust and debris in the air from moving along the shaft axis and falling into the gap between the motor housing and the rotating shaft A, thereby protecting the internal bearings and windings from contamination.

[0017] The present invention is further configured such that an annular rubber ring plate is fixedly embedded on the end face of the baffle near the motor housing.

[0018] By adopting the above technical solution, an annular rubber ring is also fixedly embedded on the end face of the baffle near the motor housing, forming a non-contact soft seal between the rubber ring and the end face of the motor housing. Even when there is slight radial runout of the shaft, a very small gap can be maintained, greatly enhancing the dustproof effect.

[0019] In summary, the beneficial technical effects of this utility model are as follows: 1. The motor shaft A has multiple spiral through-holes running through it, allowing air to enter and cool the shaft during rotation. The outlet direction of the air outlet is offset from the radial direction of the shaft A, with its central tangent tangent to the normal rotation direction, effectively preventing air from flowing back into the through-holes. The use of precision-cast aluminum alloy reduces the temperature at the tail end of the shaft A. Heat dissipation fins are installed on the inner wall of the through-holes, extending along their spiral direction, effectively preventing turbulence and increasing the contact area with air, further reducing the shaft A's temperature. Micro-arc oxidation treatment on the surface of the heat dissipation fins creates a ceramic layer, improving their wear resistance. This structure significantly reduces the shaft's temperature during use, ensuring the motor's energy efficiency is not compromised and allowing it to complete its normal operating cycle. 2. This motor shaft, by adding shaft B, serves to connect shaft A and shaft C. An installation cavity is formed inside shaft B to house a bidirectional spring rod. Both the transmission slider and the limiting plate can slide within the installation cavity. Two sliding holes are formed on the end face of shaft B, communicating with the installation cavity. The limiting plate is engaged with a slot through these sliding holes, thus securing shaft C to the outside of shaft B. By fixing the transmission slider to the limiting plate, the transmission slider can drive the limiting plate to slide. A guide block installed on the outside of shaft B works in conjunction with a guide groove inside shaft B, allowing shaft A to drive shaft C to rotate via shaft B. The bidirectional spring rod fixed inside the installation cavity pushes the two transmission sliders to reset. Using this structure, shafts A and B or shaft C can be quickly replaced, simplifying the cumbersome disassembly and replacement process and reducing equipment downtime and maintenance costs.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the rotating shaft B of this utility model; Figure 3 This is a schematic diagram of the structure of the rotating shaft C of this utility model; Figure 4This is a schematic diagram of the internal structure of the rotating shaft C of this utility model; Figure 5 This is a schematic diagram of the external structure of the rotating shaft B of this utility model.

[0022] In the diagram: 1. Shaft A; 2. Through hole; 3. Heat dissipation fins; 4. Air outlet; 5. Shaft B; 6. Shaft C; 7. Mounting cavity; 8. Two-way spring rod; 9. Transmission slider; 10. Limiting plate; 11. Slot; 12. Guide groove; 13. Baffle; 14. Rubber ring plate; 15. Guide block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Example 1 Reference Figures 1 to 5 This utility model discloses a motor shaft, including a shaft A1. The shaft A1 has multiple spiral through-holes 2 running through it. Several heat dissipation fins 3, made of aluminum alloy, are fixedly installed on the inner wall of the through-holes 2. One end of the shaft A1 is fixedly connected to an air outlet 4, whose cavity communicates with the end of the through-holes 2. The other end of the shaft A1 is provided with a shaft B5, which has an installation cavity 7. A bidirectional spring rod 8 is fixedly installed inside the installation cavity 7. Both output ends of the bidirectional spring rod 8 are fixedly connected to transmission sliders 9. An L-shaped limiting plate 10 is vertically fixed to the side of the transmission slider 9 away from the bidirectional spring rod 8. In this embodiment, the shaft A1 serves as a transmission shaft, the through-holes 2 facilitate airflow to reduce the temperature of the shaft A1, and the heat dissipation fins 3 increase the contact area with air.

[0025] Reference Figure 1 ,to Figure 4 The end of the rotating shaft B5 away from the rotating shaft A1 is connected to the rotating shaft C6; the rotating shaft C6 has a slot 11 and a guide slot 12 inside, and the slot 11 is adapted to the limiting plate 10; the corresponding end face of the rotating shaft B5 has two sliding holes, and each mounting cavity 7 is connected. In this embodiment, the rotating shaft B5 serves to connect the rotating shaft C6. The two sliding holes on the end face of the rotating shaft B5 facilitate the sliding of the limiting plate 10, and the transmission slider 9 is fixedly connected to the limiting plate 10.

[0026] Reference Figure 2 and Figure 3Multiple guide blocks 15 are symmetrically installed on the outer side of the rotating shaft B5. The cross-section of the guide block 15 is trapezoidal, and the guide groove 12 is a trapezoidal annular groove that matches the shape of the guide block 15. The guide block 15 is made of high carbon chromium bearing steel and is subjected to quenching and low temperature tempering treatment. In this embodiment, the guide block 15 plays the role of increasing the connection strength between the rotating shaft C6 and the rotating shaft B5, and the guide groove 12 plays the role of slidingly adapting to connect the guide block 15.

[0027] Reference Figure 2 The outlet direction of the air outlet 4 is deviated from the radial direction of the rotating shaft A1, and its central tangent is tangent to the normal rotation direction of the rotating shaft A1. The air outlet 4 is integrally formed by precision casting of aluminum alloy with high thermal conductivity. In this embodiment, the outlet direction of the air outlet 4 is deviated from the radial direction of the rotating shaft A1 to prevent air from flowing back into the through hole 2. Moreover, the air outlet 4 is integrally formed by precision casting of aluminum alloy with high thermal conductivity, which can effectively reduce the temperature at the tail of the rotating shaft A1.

[0028] Reference Figure 1 The heat dissipation fins 3 on the inner wall of the through hole 2 extend along its spiral direction; the surface of the heat dissipation fins 3 is subjected to micro-arc oxidation treatment to generate a ceramic layer. In this embodiment, the heat dissipation fins 3 on the inner wall of the through hole 2 extend along its spiral direction to prevent air turbulence. The micro-arc oxidation treatment on the surface of the heat dissipation fins 3 improves the wear resistance of the heat dissipation fins 3.

[0029] Reference Figure 1 An annular baffle 13 is provided at the connection between the rotating shaft A1 and the motor housing; the baffle 13 is fixedly installed on the rotating shaft B5 and rotates with it; the diameter of the baffle 13 is larger than the diameter of the rotating shaft A1, and an annular rubber ring plate 14 is also fixedly embedded on the end face of the baffle 13 near the motor housing. In this embodiment, the annular baffle 13 plays the role of driving the rubber ring plate 14 to rotate, and the rubber ring plate 14 plays the role of improving the sealing performance.

[0030] The implementation principle of this embodiment is as follows: In actual use, shaft A1 is usually locked inside the stator winding and used as the main output of the motor. Shaft B5 is fixedly connected to shaft A1, so shaft B5 will inevitably rotate with shaft A1 as it rotates. Shaft C6 is locked at one end of shaft B5. When shaft C6 is locked at one end of shaft B5, guide block 15 is locked inside guide groove 12, and the end of limit plate 10 away from transmission slider 9 is locked inside slot 11. Through the cooperation of limit plate 10 and slot 11, shaft C6 can be fixed at one end of shaft B5. Through the cooperation of guide block and guide groove 12, the connection strength between shaft C6 and shaft B5 can be increased, thereby preventing shaft B5 from slipping during use. During the rotation of the equipment by the motor, shafts A1, B5, and C6 will all rotate together, thereby driving the equipment to rotate. During the rotation of shaft A1, because the part of the through hole 2 on the surface of shaft A1 is inclined, air can quickly enter the through hole 2. After the air enters the through hole 2, the through hole 2 is spiral-shaped, and a continuous stream of air enters the through hole 2, pushing the air that previously entered the through hole 2 to flow. During the air flow, the heat generated by the operation of shaft A1 can be carried away. At the same time, heat dissipation fins 3 are also provided inside the through hole 2, which can increase the contact area with the air, thereby further increasing the heat dissipation effect. During prolonged use, when the rotating shaft C6 becomes severely worn and unable to function properly, the motor is powered off and enters a stop state. The operator places both hands on the two surfaces of the transmission slider 9 and presses the transmission slider 9 firmly. The transmission slider 9 can slide inside the mounting cavity 7. Since the limiting plate 10 is fixedly connected to the transmission slider 9, the process of pushing the transmission slider 9 to slide inside the mounting cavity 7 can drive the limiting plate 10 to move towards the opposite direction, so that the distance between the limiting plates 10 gradually decreases. During this process, the limiting plate 10 will gradually slide out of the slot 11, and the output shaft of the bidirectional spring rod 8 will be compressed until the limiting plate 10 slides out of the slot 11. Then another worker pulls the rotating shaft C6 to separate the rotating shaft C6 from the rotating shaft B5. During this process, the guide block 15 and the guide groove 12 are slidably connected. When the rotating shaft C6 is pulled to move, the guide block needs to be pulled to separate from the guide groove 12. After the guide block 15 and the guide groove 12 are separated, the rotating shaft C6 and the rotating shaft B5 are also separated. Then a new rotating shaft C6 can be installed at one end of the rotating shaft B5. During the installation of shaft C6, workers still need to press the transmission slider 9 to allow the limiting plate 10 to enter the installation cavity 7. Then, another worker aligns the guide groove 12 with the guide block 15, so that shaft C6 and shaft B5 are concentric. At this time, shaft C6 is pushed towards shaft B5. When the guide block 15 enters the guide groove 12, the worker pressing the transmission slider 9 can release it. At this time, the limiting plate 10 is engaged inside shaft C6, but the slot 11 has not moved to this position. The output shaft of the bidirectional spring rod 8 is still in a compressed state until the slot 11 moves to the position of the limiting plate 10. Then, the output shaft of the bidirectional spring rod 8 will quickly extend outward and push the transmission slider 9 to the initial position until the limiting plate 10 is engaged inside the slot 11. This completes the replacement of shaft C6. Finally, shaft C6 is connected to the equipment, and the motor can be started to continue the operation.

Claims

1. A motor shaft, comprising a shaft A (1), characterized in that: The shaft A (1) has multiple spiral through holes (2) running through it; several heat dissipation fins (3) are fixedly installed on the inner wall of the through holes (2), and the heat dissipation fins (3) are made of aluminum alloy; one end of the shaft A (1) is fixedly connected to an air outlet (4), and its cavity is connected to the end of the through holes (2); the other end of the shaft A (1) is provided with a shaft B (5), and the shaft B (5) has an installation cavity (7) inside. A bidirectional spring rod (8) is fixedly installed inside the installation cavity (7), and a transmission slider (9) is fixedly connected to both output ends of the bidirectional spring rod (8). An L-shaped limiting plate (10) is vertically fixed on the side of the transmission slider (9) away from the bidirectional spring rod (8).

2. The motor shaft according to claim 1, characterized in that: The end of the rotating shaft B (5) away from the rotating shaft A (1) is connected to the rotating shaft C (6); the rotating shaft C (6) has a slot (11) and a guide slot (12) inside, the slot (11) is adapted to the limiting plate (10); the corresponding end face of the rotating shaft B (5) has two sliding holes, each of the mounting cavities (7) is connected.

3. A motor shaft according to claim 2, characterized in that: Multiple guide blocks (15) are symmetrically installed on the outer side of the rotating shaft B (5). The cross-section of the guide block (15) is trapezoidal, and the guide groove (12) is a trapezoidal annular groove that matches the shape of the guide block (15). The guide block (15) is made of high carbon chromium bearing steel and is subjected to quenching and low temperature tempering treatment.

4. A motor shaft according to claim 1, characterized in that: The outlet direction of the air outlet (4) is deviated from the radial direction of the rotating shaft A (1), and its central tangent is tangent to the normal rotation direction of the rotating shaft A (1); the air outlet (4) is integrally formed by precision casting of aluminum alloy with high thermal conductivity.

5. A motor shaft according to claim 1, characterized in that: The heat dissipation fins (3) on the inner wall of the through hole (2) extend along its spiral direction; the surface of the heat dissipation fins (3) is subjected to micro-arc oxidation treatment to generate a ceramic layer.

6. A motor shaft according to claim 1, characterized in that: An annular baffle (13) is provided at the connection between the rotating shaft A (1) and the motor housing; the baffle (13) is fixedly installed on the rotating shaft B (5) and rotates with it; the diameter of the baffle (13) is larger than the diameter of the rotating shaft A (1).

7. A motor shaft according to claim 6, characterized in that: The baffle (13) is also fixedly fitted with an annular rubber ring plate (14) on the end face near the motor housing.

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