Vacuum spheroidizing annealing motor integrated shaft

Abstract

The utility model provides a vacuum spheroidizing annealing motor integrated shaft, and belongs to the technical field of motor integrated shafts. Comprising a motor body; one end of the integrated shaft body is arranged on the motor body, and the integrated shaft body is subjected to vacuum spheroidizing annealing treatment; and the coupler is arranged at the other end of the integrated shaft body. By arranging the elastic base body and the shape memory alloy wire, when the operation condition of equipment changes and different torque outputs are needed, the temperature of the shape memory alloy wire is changed through the heating coil, so that the shape of the shape memory alloy wire is changed, and as the alloy wire is embedded into the elastic base body, the mechanical property of the whole adjusting piece can be changed; therefore, the rigidity of connection between the shaft and the coupler is flexibly adjusted, the rigidity is not fixed any more, and the torque requirements of different working stages can be well met.

Description

Technical Field

[0001] This utility model relates to the field of integrated motor shaft technology, and in particular to an integrated motor shaft subjected to vacuum spheroidizing annealing. Background Technology

[0002] An integrated motor shaft is a component that integrates a motor and a drive shaft, its main function being to directly and efficiently transmit the power generated by the motor to the load device. However, in actual manufacturing and installation, even when using an integrated motor shaft, due to factors such as machining accuracy and assembly errors, the connection between the motor output shaft and various actuators in precision machinery such as CNC machine tools, precision grinding machines, and electronic chip manufacturing equipment cannot naturally achieve extremely high coaxiality and transmission accuracy. Therefore, couplings are sometimes still needed to compensate for certain axial, radial, and angular deviations to ensure smooth power transmission between the integrated motor shaft and the load shaft.

[0003] Currently, traditional shafts and couplings use rigid connections. When the operating conditions of the equipment change and different torque outputs are required at different working stages, the fixed stiffness connection cannot adapt well. Therefore, this application provides a vacuum spheroidizing annealed integrated motor shaft to meet the requirements. Utility Model Content

[0004] This invention provides a vacuum spheroidizing annealed integrated motor shaft to solve existing technical problems.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution.

[0006] A vacuum spheroidizing annealed integrated motor shaft includes: a motor body; an integrated shaft body, one end of which is disposed on the motor body, the integrated shaft body being subjected to vacuum spheroidizing annealing treatment; a coupling disposed at the other end of the integrated shaft body; an adjusting member disposed between the coupling and the integrated shaft body, forming an annular shape; the adjusting member includes: an outer layer, a heating layer, a placement layer, and an inner layer; an elastic matrix disposed within the placement layer; shape memory alloy wires arranged alternately along the circumferential and axial directions and embedded within the elastic matrix; and a heating coil disposed within the heating layer for heating the shape memory alloy wires.

[0007] The outer layer wraps the heating layer, the heating layer wraps the placement layer, and the placement layer wraps the inner layer.

[0008] The inner layer is made of a heat-insulating material, such as ceramic, asbestos, or aerogel, to reduce heat conduction to the integrated shaft body.

[0009] The outer layer is made of a heat-insulating coating or a heat-insulating sleeve. The heat-insulating coating is a ceramic coating or a heat-insulating paint, and the heat-insulating sleeve is made of glass fiber, rock wool or polyurethane foam material to prevent heat from spreading to the coupling and the surrounding environment.

[0010] The shape memory alloy wire has a linear or sheet-like structure.

[0011] The heating coil is in the shape of a ring and is wrapped around the shape memory alloy wire.

[0012] The elastic matrix is ​​provided with reinforcing ribs, which are distributed along the circumferential direction or the axial direction.

[0013] The elastic matrix is ​​made of rubber, polyurethane, or silicone material.

[0014] Compared with the prior art, this utility model has at least the following beneficial effects.

[0015] In the above scheme, by setting an elastic matrix and shape memory alloy wire, when the operating conditions of the equipment change and different torque outputs are required, the temperature of the shape memory alloy wire is changed by heating coil, causing it to change shape. Since the alloy wire is embedded in the elastic matrix, this changes the mechanical properties of the entire adjustment component, thereby flexibly adjusting the stiffness of the connection between the shaft and the coupling, so that it is no longer a fixed stiffness, and can well adapt to the torque requirements of different working stages. Attached Figure Description

[0016] Figure 1 A schematic diagram of an integrated motor shaft subjected to vacuum spheroidizing annealing.

[0017] Figure 2 This is a cross-sectional view of the coupling structure.

[0018] Figure 3 This is a side view of the adjustment component structure.

[0019] Figure 4 This is a schematic diagram of a shape memory alloy wire structure.

[0020] [Figure Labels]

[0021] 1. Motor body; 2. Integrated shaft body; 3. Coupling; 4. Adjusting component; 41. Outer layer; 42. Heating layer; 43. Placement layer; 44. Inner layer; 45. Elastic matrix; 46. Heating coil; 47. Shape memory alloy wire.

[0022] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0023] The following is a detailed description of a vacuum spheroidizing annealed integrated motor shaft provided by this utility model, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0024] like Figure 1 - Figure 4 As shown, an embodiment of this utility model provides a vacuum spheroidizing annealed integrated motor shaft, comprising: a motor body 1; an integrated shaft body 2, one end of which is disposed on the motor body 1, the integrated shaft body 2 being subjected to vacuum spheroidizing annealing treatment; a coupling 3, disposed at the other end of the integrated shaft body 2; an adjusting member 4, disposed between the coupling 3 and the integrated shaft body 2, and in an annular shape; the adjusting member 4 comprising: an outer layer 41, a heating layer 42, a placement layer 43, and an inner layer 44; an elastic substrate 45 disposed within the placement layer 43; shape memory alloy wires 47, arranged alternately along the circumferential and axial directions and embedded within the elastic substrate 45; and a heating coil 46 disposed within the heating layer 42 for heating the shape memory alloy wires 47.

[0025] By setting shape memory alloy wire 47, the shape memory alloy wire 47 and the elastic matrix 45 are closely integrated to form an organic whole. When the elastic matrix 45 undergoes a small elastic deformation, the shape memory alloy wire 47 can undergo a corresponding deformation. The shape memory alloy wire 47 is arranged alternately along the circumferential direction and the axial direction, which enables the adjustment part 4 to have good deformation ability in multiple directions. When the elastic matrix 45 is deformed by torque, the shape memory alloy wire 47 can distribute and guide the deformation in different directions, avoiding stress concentration in a certain direction.

[0026] The outer layer 41 wraps around the heating layer 42, the heating layer 42 wraps around the placement layer 43, and the placement layer 43 wraps around the inner layer 44. This multi-layered heat insulation structure enables effective heat control. During the process of heating the shape memory alloy wire 47 to improve the stiffness of the adjustment component 4, the heat is concentrated between the placement layer 43 and the heating layer 42, ensuring that the shape memory alloy wire 47 can quickly reach the required phase transition temperature, while avoiding adverse effects of heat on other components.

[0027] The inner layer 44 is made of heat-insulating material, such as ceramic, asbestos, or aerogel, to reduce heat conduction to the integrated shaft body 2. By providing the inner layer 44, it can be connected to the integrated shaft body 2 via a key connection or interference fit. When the heating coil 46 heats the shape memory alloy wire 47 to cause a phase change and adjust the stiffness, heat is generated. The heat-insulating material of the inner layer 44 acts as a thermal barrier, significantly reducing the rate of heat transfer from the adjusting component 4 to the integrated shaft body 2.

[0028] The outer layer 41 is made of a heat-insulating coating or a heat-insulating sleeve. The heat-insulating coating is a ceramic coating or heat-insulating paint, and the heat-insulating sleeve is made of glass fiber, rock wool, or polyurethane foam. It is used to prevent heat from diffusing to the coupling 3 and the surrounding environment. By setting the outer layer 41 as a heat isolation barrier, the low thermal conductivity of the heat-insulating sleeve made of materials such as ceramic coating, heat-insulating paint, glass fiber, rock wool, or polyurethane foam is used to prevent heat from being transferred from the adjusting component 4 to the coupling 3 and the surrounding environment.

[0029] The shape memory alloy wire 47 has a linear or sheet-like structure. When the shape memory alloy wire 47 is linear, it is arranged alternately along the circumferential and axial directions within the elastic matrix 45, like a fine net woven within the elastic matrix 45. When the adjusting component 4 is subjected to torque, the linear alloy wire can bear tensile or compressive forces along its length, sharing the deformation stress of the elastic matrix 45. This slender linear structure can effectively disperse stress in all directions, avoiding stress concentration in local areas, allowing the adjusting component 4 to deform more uniformly as a whole. If the shape memory alloy wire 47 is sheet-like, it can provide a larger area in the planar direction to bear and transmit stress. The sheet-like alloy wire within the elastic matrix 45 can act like a multi-layered thin plate, adapting to the deformation of the elastic matrix 45 through its own bending and stretching when subjected to torque, while dispersing stress over a larger area, thereby enhancing the adjusting component 4's resistance to deformation.

[0030] The heating coil 46 is ring-shaped and surrounds the shape memory alloy wire 47. By setting the heating coil 46, heat can be evenly distributed in the circumferential direction of the shape memory alloy wire 47. When current passes through the heating coil 46, the magnetic field generated by the coil will induce eddy currents inside the shape memory alloy wire 47, thereby heating the alloy wire. Power can be supplied by slip rings or induction power supply.

[0031] The elastic matrix 45 is provided with reinforcing ribs, which are distributed along the circumferential direction or the axial direction. By setting the reinforcing ribs, when they are distributed in the circumferential direction, excessive torsional deformation of the elastic matrix 45 in the circumferential direction is prevented; when they are distributed in the axial direction, the compressive strength of the elastic matrix 45 is enhanced, avoiding damage caused by excessive compression or stretching of the elastic matrix 45 in the axial direction; and in conjunction with the shape memory alloy wire 47, the reinforcing ribs can make the deformation of the elastic matrix 45 more regular and predictable during the stiffness adjustment process, so that the phase transformation and stiffness change of the shape memory alloy wire 47 can better match the deformation of the elastic matrix 45.

[0032] The elastic matrix 45 is made of rubber, polyurethane, or silicone. By using rubber as the elastic matrix 45, it can exhibit excellent elasticity, enabling it to produce large elastic deformation under relatively small external forces. Polyurethane also possesses good elasticity and toughness, allowing it to both generate elastic deformation like rubber to cushion impacts and resist large deformations to a certain extent, maintaining its shape stability. Silicone is a highly elastic and flexible material that can adapt to different torque fluctuations, and its elastic properties show relatively little decay over long-term use.

[0033] In the low torque demand stage, the shape memory alloy wire 47 remains in the martensitic phase. Due to the properties of the elastic matrix 45, it dominates the deformation of the adjusting component 4, resulting in lower stiffness. The motor body 1 starts operating, and the smaller torque transmitted by the integrated shaft body 2 is transmitted to the coupling 3 through the low-stiffness adjusting component 4. When entering the high torque demand stage, the heating coil 46 is activated to heat the shape memory alloy wire 47. As the temperature rises, the shape memory alloy wire 47 gradually undergoes a phase transformation, changing from the martensitic phase to the austenitic phase. The material stiffness increases accordingly, significantly improving the tightness of the connection between the integrated shaft body 2 of the motor and the coupling 3.

[0034] The vacuum spheroidizing annealing process of this utility model for the integrated motor shaft adopts the following process: 1. The integrated motor shaft is made of 35 steel, which can form a good spheroidized structure under suitable heat treatment conditions.

[0035] 2. After holding at an incomplete austenitization temperature of 760℃ under vacuum, the workpiece is rapidly cooled to 680℃ and held to ensure sufficient spheroidization isothermal transformation. After being cooled in the furnace to 550℃, the workpiece is removed from the furnace and air-cooled to obtain uniformly distributed fine spheroidal cementite and a lower hardness value, which is beneficial for extrusion processing.

[0036] The vacuum spheroidizing annealing treatment of the integrated motor shaft of this utility model adopts the following technical indicators: 1. Surface hardness 65-70HRB.

[0037] 2. Heart hardness 65-70 HRB.

[0038] 3. The spheroidization level is better than level 2.

[0039] The vacuum spheroidizing annealing treatment of the integrated motor shaft of this utility model has the following characteristics: 1. The material is 35 steel, which is suitable for cold pressure forming after spheroidizing and can also provide preparation conditions for heat treatment hardening of the formed integrated shaft.

[0040] 2. A lower austenitizing temperature and isothermal treatment ensure sufficient undissolved carbide particles to form spherical carbides, which is beneficial for cold extrusion molding.

[0041] 3. Vacuum isothermal spheroidizing annealing is adopted, which does not produce decarburization or carbonization on the surface. After forming, it can be directly subjected to heat treatment and hardening treatment, eliminating the need for surface cutting process.

[0042] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details have been described in detail in the above preferred embodiments; however, those skilled in the art can fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A vacuum spheroidizing annealed integral motor shaft, characterized in that, include: Motor body (1); An integral shaft body (2) is provided at one end on the motor body (1), and the integral shaft body (2) is subjected to vacuum spheroidizing annealing treatment; A coupling (3) is disposed at the other end of the integral shaft body (2); Adjustment component (4) is arranged between the coupling (3) and the integral shaft body (2) in an annular shape; The adjustment component (4) includes: an outer layer (41), a heating layer (42), a placement layer (43), and an inner layer (44); An elastic matrix (45) is disposed within the placement layer (43); Shape memory alloy wires (47) are arranged alternately along the circumferential direction and the axial direction and embedded in the elastic matrix (45); A heating coil (46) is disposed within the heating layer (42) for heating the shape memory alloy wire (47).

2. The vacuum spheroidizing annealed integrated motor shaft according to claim 1, characterized in that, The outer layer (41) wraps the heating layer (42), the heating layer (42) wraps the placement layer (43), and the placement layer (43) wraps the inner layer (44).

3. The vacuum spheroidizing annealed integrated motor shaft according to claim 1, characterized in that, The inner layer (44) is made of heat-insulating material, which is ceramic, asbestos or aerogel material, to reduce the conduction of heat to the integral shaft body (2).

4. The vacuum spheroidizing annealed integrated motor shaft according to claim 1, characterized in that, The outer layer (41) is made of a heat-insulating coating or a heat-insulating sleeve. The heat-insulating coating is a ceramic coating or a heat-insulating paint, and the heat-insulating sleeve is made of glass fiber, rock wool or polyurethane foam material to prevent heat from spreading to the coupling (3) and the surrounding environment.

5. The vacuum spheroidizing annealed integrated motor shaft according to claim 1, characterized in that, The shape memory alloy wire (47) has a linear or sheet-like structure.

6. The vacuum spheroidizing annealed integrated motor shaft according to claim 1, characterized in that, The heating coil (46) is in the shape of a ring and is wrapped around the shape memory alloy wire (47).

7. The vacuum spheroidizing annealed integral motor shaft according to claim 1, characterized in that, The elastic matrix (45) is provided with reinforcing ribs, which are distributed along the circumferential direction or the axial direction.

8. The vacuum spheroidizing annealed integrated motor shaft according to claim 1, characterized in that, The elastic matrix (45) is made of rubber, polyurethane or silicone material.

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