Improved structure of low-cost motor rotor

Abstract

The utility model discloses an improved structure of a low-cost motor rotor, which belongs to the technical field of linear motors, the rotor comprises a screw rod, a retainer combined on the screw rod and a magnetic ring fixedly connected on the ring surface of the retainer, and the retainer adopts sheet metal parts and is fixed on the screw rod by pressing in and interference fit. According to the improved structure of the rotor, the retainer is made of sheet metal parts, so that the mass of the retainer is low, the inertia of the rotor is favorably improved, and the cost of the rotor is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of linear motors and provides a low-cost improved motor rotor structure. Background Art

[0002] Conventional linear motors can be installed on scanners, printers, fax machines, cameras, air conditioners, digital cameras, copiers, electronic whiteboards, DVDROMs, monitors and other devices to drive them to work. The conventional linear motor mainly includes a stator, a housing, a rotor, a bearing, a cover, etc., and the rotor is usually composed of a screw, a retainer and a magnetic ring. Among them: One of the common structures, such as Figure 6 As shown, a plastic retainer is used to fix the screw and the magnetic ring with plastic through the injection molding process; the stepped shaft structure at the end of the screw is for the sake of simple mold structure, without a slider structure; the slots on the screw are for radial locking of the rotor to prevent slipping; due to the process requirements, this type of rotor has a complex screw structure and increases the processing steps, making the screw cost high and the cost of the entire rotor also increased; the second common structure, such as Figure 7 As shown, an aluminum alloy retainer is used, the screw rod and the aluminum alloy retainer are pressed and fixed by interference fit, and the magnetic ring and the aluminum alloy retainer are fixed by bonding; this type of rotor has a high material cost of the aluminum alloy retainer, and the cost of the entire rotor is also increased. Therefore, it is necessary to further study alternative solutions for the retainer in the rotor structure to reduce structural complexity and process costs. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a low-cost motor rotor improvement structure to optimize the design of the retainer to solve the problems of unnecessary complexity and high cost of the rotor.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] The utility model provides a low-cost motor rotor improvement structure, the rotor includes a screw, a retainer combined with the screw, and a magnetic ring fixed to the retainer ring surface, the retainer is a sheet metal part, and the retainer is pressed into and fixed on the screw by interference fit. By adopting the above scheme, the low-cost motor rotor improvement structure effectively solves the problem of complex structure and high cost of traditional rotors by improving the retainer to a sheet metal structure, and provides an innovative solution for the development of low-cost motors.

[0006] Optionally, the retainer is provided with a central through-hole for the lead screw to pass through pivotally. The central through-hole is formed with a flanging towards one side by stamping, and a pressing groove is provided on the retainer around the flanging. In this way, the design of the central through-hole and the flanging makes the installation and positioning of the lead screw more convenient, improves the production efficiency, and reduces the complexity in the assembly process; while the design of the flanging increases the overall rigidity of the retainer, enhances the durability of the rotor, and adapts to higher working loads; and the existence of the pressing groove helps to form a better strength effect, ensuring a more firm connection between the retainer and the lead screw during use.

[0007] Optionally, the retainer is provided with two or more according to its strength and the axial length of the magnetic ring, and two or more retainers are arranged at intervals on the lead screw. In this way, the setting of multiple retainers can share the load generated by the rotor during operation, improve the load-bearing capacity and durability of the rotor; and the multiple retainers arranged at intervals can effectively prevent the rotor from axially displacing during high-speed rotation, ensuring the stability and accuracy of the rotor; at the same time, the design of multiple retainers can better fix the magnetic ring, ensuring its stable position during operation, thereby enhancing the magnetic performance and driving efficiency of the linear motor.

[0008] Optionally, at least one air hole is provided on the radial toroidal surface of the retainer. In this way, the design of the air hole can effectively improve the heat dissipation performance of the rotor during operation, improve the working efficiency and lifespan of the rotor and the motor; at the same time, during the press-fitting process of multiple sheet metal parts (retainers), the air hole can allow air to flow between each pair. This helps to reduce gas compression and resistance, avoid air retention, and thus ensure the smooth progress of the assembly.

[0009] Optionally, both the lead screw and the retainer are made of metal materials. The lead screw is made of 4Cr13 or SUS303 stainless steel, and the retainer is made of SUS304 stainless steel or SECC galvanized steel sheet. In this way, the lead screw and the retainer made of metal materials can significantly improve the strength and durability of the entire rotor, ensuring long-term stable operation in high-load and high-frequency working environments.

[0010] Optionally, the outer surface of the retainer and the magnetic ring are bonded with UV glue, and the magnetic ring is a neodymium iron boron magnetic ring. In this way, the UV glue has good adhesion and high-temperature resistance performance, and can form a strong bond between the retainer and the magnetic ring, ensuring that the magnetic ring will not fall off or move during rotation, and adapting to the working requirements of the motor in a high-temperature environment, preventing the bonding part from failing due to thermal deformation, thereby improving the stability and reliability of the rotor.

[0011] The beneficial effects of the present utility model are:

[0012] 1. The improved structure of this low-cost motor rotor uses a more cost-effective and simple-structured sheet metal part (retainer) as a solution, resulting in a low-quality retainer that helps improve the rotor inertia and greatly reduces the rotor cost, thereby reducing the production cost of the overall linear motor and enhancing the market competitiveness.

[0013] 2. The improved structure of this low-cost motor rotor, by designing the retainer as multiple and spaced-apart structures, not only enhances the strength and stability of the rotor but also provides an effective solution for improving the performance of the linear motor.

[0014] 3. The improved structure of this low-cost motor rotor, through the design of air holes on the retainer, not only improves the heat dissipation and maintenance performance but also facilitates the press-fitting of multiple sheet metal parts, ensuring the smooth progress of the assembly process and the assembly accuracy.

[0015] Other advantages, objectives, and features of the present utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the present utility model will be described in preferred detail below in conjunction with the drawings, where:

[0017] Figure 1 is a schematic diagram of the improved structure of the low-cost motor rotor of the present utility model;

[0018] Figure 2 is Figure 1 exploded view of;

[0019] Figure 3 is Figure 1 axial sectional view of;

[0020] Figure 4 is Figure 1 front view of the retainer in;

[0021] Figure 5 is Figure 4 back view of;

[0022] Figure 6 is an axial sectional view of the rotor structure in the prior art;

[0023] Figure 7 is an axial sectional view of the rotor structure two in the prior art;

[0024] Figure numerals: 1-screw; 2-retainer, 21-center through hole, 22-flanging, 23-pressing groove, 24-air hole; 3-magnetic ring. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with specific implementation methods. The drawings are only used for exemplary descriptions, and are only schematic diagrams, not actual pictures, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0026] like Figures 1-5 As shown, the utility model mentions a low-cost motor rotor improvement structure, the rotor includes a screw 1, as the core component of the rotor, responsible for driving the rotation; a retainer 2, combined with the screw 1, the rigidity and strength of the sheet metal made of sheet metal can provide good support to ensure the stability and service life of the rotor; and the retainer 2 is fixed to the screw 1 by pressing, and the interference fit design is adopted to ensure the tight connection between the retainer 2 and the screw 1 to avoid sliding or loosening during rotation; the magnetic ring 3 is fixed to the ring surface of the retainer 2 to provide the rotor with the necessary magnetic properties. The above scheme is adopted, and the material and processing costs are significantly reduced by using sheet metal parts instead of complex plastic or aluminum alloy structures for the retainer; and the interference fit connection between the retainer and the screw simplifies the assembly process, reduces the dependence on bonding or complex connection structures, and improves production efficiency.

[0027] In this embodiment, the retainer 2 is provided with a central through hole 21 for the screw rod 1 to pass through, ensuring that the screw rod 1 can be smoothly connected to the retainer 2 and maintain good centering; the central through hole 21 is formed by stamping to form a flange 22 facing one side, and the existence of the flange 22 not only increases the structural strength of the retainer 2, but also can effectively prevent the screw rod 1 from sliding or moving during the installation process, thereby enhancing the stability of the connection; and the retainer 2 is provided with a pressing groove 23 surrounding the flange 22, which is formed during stamping and can provide better strength effect during the pressing process, thereby ensuring the stability of the tight fit between the retainer 2 and the screw rod 1 and preventing loosening or falling off.

[0028] In this embodiment, the retainer 2 is provided in two or more according to its strength and the axial length of the magnetic ring 3; this design can reasonably allocate the number of retainers 2 according to actual application requirements to ensure the strength and stability of the rotor; and multiple retainers 2 are arranged at intervals on the lead screw 1, that is, through a reasonable spacing design, the stress generated by the rotor during operation can be effectively dispersed, the local stress concentration phenomenon can be reduced, and the stability of the overall structure can be improved. With the above structure, by adjusting the number and spacing of the retainers, it can be optimized according to different application requirements and performance requirements, making the rotor more adaptable in different working environments.

[0029] In this embodiment, at least one air hole 24 is provided on the radial toroidal surface of the retainer 2. Such air holes 24 can be provided at different positions of the retainer 2 to meet specific design requirements. The design of the air holes 24 can effectively disperse the gas pressure generated during the assembly process, prevent interference problems caused by gas retention, and make it easier and smoother for the retainer 2 to dock with the lead screw 1 when pressed in.

[0030] In this embodiment, both the lead screw 1 and the retainer 2 are made of metal materials. Specifically, the lead screw 1 is made of 4Cr13 or SUS303 stainless steel. This material has good strength, corrosion resistance, and wear resistance, and is suitable for high-load and high-speed application environments. That is, 4Cr13 stainless steel can obtain high hardness after heat treatment to ensure stable performance of the lead screw during operation; while the retainer 2 is made of SUS304 stainless steel or SECC galvanized steel sheet. This 304 stainless steel is a common austenitic stainless steel with excellent corrosion resistance and good mechanical properties, suitable for applications in various environments, and the formability of 304 stainless steel is also good, which is convenient for stamping processing.

[0031] In this embodiment, the outer surface of the retainer 2 and the magnetic ring 3 are bonded with UV glue. UV glue is an adhesive cured by ultraviolet light, which has the characteristics of rapid curing, strong adhesion, and heat resistance; and the magnetic ring 3 is made of neodymium iron boron (NdFeB) material. This material is famous for its high energy density and strong magnetism, and can provide a strong magnetic field, suitable for applications in high-performance linear motors and electric motors.

[0032] Generally speaking, the design of the sheet metal part (retainer) adopted in the present utility model not only optimizes the structure of the rotor, but also improves the overall production efficiency and use reliability of the rotor, thereby effectively enhancing the performance of the motor and reducing the production cost, providing an innovative idea for the research and development of low-cost motor rotors.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A low-cost motor rotor improvement structure, the rotor comprising a screw (1), a retainer (2) coupled to the screw (1), and a magnetic ring (3) fixed to the annular surface of the retainer (2), characterized in that: The retainer (2) is a sheet metal part, and the retainer (2) is pressed in and fixed on the screw rod (1) by interference fit.

2. The low-cost motor rotor improvement structure according to claim 1, characterized in that: The retainer (2) is provided with a central through hole (21) for the screw rod (1) to pass through the pivot, the central through hole (21) is formed by stamping with a flange (22) facing one side, and the retainer (2) is provided with a pressing groove (23) surrounding the flange (22).

3. The low-cost motor rotor improvement structure according to claim 1 or 2, characterized in that: The number of the retainers (2) is two or more according to their strength and the axial length of the magnetic ring (3), and the two or more retainers (2) are arranged at intervals on the screw rod (1).

4. The low-cost motor rotor improvement structure according to claim 3 is characterized in that: The radial annular surface of the retainer (2) is provided with at least one air hole (24).

5. The low-cost motor rotor improvement structure according to claim 3, characterized in that: The screw rod (1) and the retainer (2) are both made of metal materials. The screw rod (1) is made of 4Cr13 or SUS303 stainless steel, and the retainer (2) is made of SUS304 stainless steel or SECC galvanized steel plate.

6. The low-cost motor rotor improvement structure according to claim 1, characterized in that: The outer surface of the retainer (2) and the magnetic ring (3) are bonded together using UV glue, and the magnetic ring (3) is a neodymium iron boron magnetic ring.

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