Motor for loom

Abstract

The utility model relates to the technical field of textile machinery, in particular to a motor for a loom. The motor comprises a rotor magnet yoke which is provided with an annular base body, and the annular base body is provided with a mounting part in the circumferential direction; the permanent magnets and the non-magnetic-conductive parts are alternately arranged on the mounting part at intervals, and the magnetic permeability of the non-magnetic-conductive parts is lower than that of the rotor magnet yoke; and the fixed part is pressed on the outer sides of the permanent magnet and the non-magnetic part so as to fix the permanent magnet and the non-magnetic part. In addition, the motor further comprises a stator, the stator is provided with installation protrusions and heat dissipation grooves, the heat dissipation grooves are axially arranged along the peripheries of the stator iron cores in a penetrating mode, and the installation protrusions are used for being embedded into the adjacent stator iron cores. According to the motor, the non-magnetic parts are arranged between the permanent magnets, and the fixed parts are adopted for integrated protection, so that the magnetic field distribution of the motor is optimized, the structural stability is enhanced, and the cost of the motor is reduced.

Description

Technical Field

[0001] This utility model relates to the field of textile machinery technology, and more specifically, to a motor for a loom. Background Technology

[0002] With the development of science and technology, looms have evolved from traditional complex mechanical structures to modern looms that utilize multiple disciplines such as electrical technology, microelectronics technology, automatic control technology, mechanical technology, pneumatic technology, and optical technology, resulting in richer functions and a higher degree of automation.

[0003] Currently, three-phase AC asynchronous motors are commonly used as the power unit in looms. These motors contain permanent magnets, and mounting slots are machined circumferentially on the rotor yoke surface to embed the permanent magnets. Fixing and sealing are achieved using separate protective components such as metal sleeves or plastic brackets. However, this technical solution has the following drawbacks: Slotting the yoke requires precision machining, resulting in a material loss rate as high as 5%-10%, and tool wear and equipment depreciation costs account for more than 20% of the total manufacturing cost. Furthermore, the stringent dimensional tolerances of the permanent magnets and slots further increase machining difficulty and assembly time. In addition, the geometric structure of the mounting slots disrupts the continuity of the magnetic conduction path of the yoke, leading to a magnetic leakage rate of 8%-12%, significantly reducing the motor's output torque. Simultaneously, the slotting of the yoke disrupts the magnetic conduction path, increasing the risk of magnetic leakage, and magnetic field distortion easily occurs at the edge of the slots, causing torque fluctuations and thus affecting the smooth operation of the loom. Utility Model Content

[0004] The problems solved by this invention are the high cost and complex installation of motors used in looms, as well as the magnetic field distortion and magnetic leakage caused by the slotted design of the motor rotor.

[0005] To solve the above problems, the present invention adopts the following technical solution: a motor for a weaving machine, the motor comprising: a rotor yoke having an annular base, the annular base having a mounting portion in the circumferential direction; multiple permanent magnets and non-magnetic components, the permanent magnets and non-magnetic components being alternately and spaced on the mounting portion; and a fixing member, the fixing member being pressed onto the outside of the permanent magnets and non-magnetic components to fix the permanent magnets and non-magnetic components; wherein, the permeability of the non-magnetic components is lower than the permeability of the rotor yoke.

[0006] Compared with existing technologies, the technical effects achieved by this solution are as follows: First, by directly and alternately fixing permanent magnets and non-magnetic components to the mounting part of the rotor yoke, and using press-fit fasteners to replace traditional split protective components, the number of parts is reduced by more than 30%, simplifying the assembly process, eliminating the yoke slotting process, and reducing processing and labor costs. Second, by isolating the magnetic fields of adjacent permanent magnets through non-magnetic components, leakage magnetic loss is reduced, and the torque density of the motor is improved. Third, after the fasteners are press-fitted, the fasteners, permanent magnets, and rotor yoke form a closed magnetic circuit. The non-magnetic components and permanent magnets are spaced apart, reducing magnetic field distortion and magnetic reluctance, and optimizing the uniformity of magnetic field distribution.

[0007] Furthermore, the thickness of the non-magnetic components is less than or equal to the thickness of the permanent magnets, and they are distributed alternately along the circumferential direction of the rotor yoke.

[0008] Compared with existing technologies, the technical effects achieved by this solution are as follows: First, the thickness limitation of non-magnetic components reduces their blocking area on the magnetic field of permanent magnets, allowing the magnetic field of permanent magnets to be more fully coupled to the rotor yoke, reducing magnetic leakage and improving motor torque output. Second, it saves material costs; the reduced thickness of non-magnetic components makes them easier to form by stamping or extrusion, increasing processing efficiency by 25% and adapting to high-speed continuous production. Third, the alternating interval distribution ensures uniform magnetic field isolation between adjacent permanent magnets, reducing magnetic field distortion rate and lowering motor operating noise and vibration.

[0009] Furthermore, the ratio of the circumferential width of the permanent magnet to the circumferential width of the non-magnetic component is 6:1 to 8:1, and the circumferential width of the permanent magnet is greater than that of the non-magnetic component. The circumferential width refers to the width in the circumferential direction of the annular base of the rotor yoke.

[0010] Compared with existing technologies, the technical effects achieved by this solution are as follows: First, by setting the ratio of the circumferential width of the permanent magnet to the circumferential width of the non-magnetic component to 6:1 to 8:1, with a larger permanent magnet width, the amount of non-magnetic component material can be minimized while ensuring magnetic field strength, thus saving material costs. Second, the width ratio of the permanent magnet to the non-magnetic component is sufficient to generate a strong magnetic field, reducing magnetic leakage and improving magnetic circuit efficiency. Third, the reduction in the amount of non-magnetic component material lowers the overall rotor weight, resulting in a lighter motor structure.

[0011] Furthermore, the permanent magnet has fitting parts on both sides, and the non-magnetic component has abutment parts that match the shape of the fitting parts. The fitting parts and abutment parts form a snap-fit ​​engagement along the rotor radial direction to limit the circumferential displacement of the permanent magnet.

[0012] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: First, the radial snap-fit ​​of the fitting part and the abutment part restricts the circumferential displacement of the permanent magnet, avoiding loosening caused by centrifugal force during high-speed rotation. Second, the overall assembly process of the motor using this snap-fit ​​method does not require additional curing processes, which simplifies the assembly process and improves production efficiency.

[0013] Furthermore, the side of the abutting part closer to the fastener is the top edge, and the side of the abutting part closer to the mounting part is the bottom edge. The length of the top edge along the circumference of the mounting part is greater than the length of the bottom edge along the circumference of the mounting part.

[0014] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: the fixed side is longer than the bottom side, and the difference in length between the two forms a guiding structure, which makes the non-magnetic parts fit better against the permanent magnet during installation and prevents the non-magnetic parts from shifting during the pressing process.

[0015] Furthermore, the surface of the mounting part is treated with spraying or brushing to form a first adhesive layer, and the permanent magnet and non-magnetic components are fixed to the mounting part through the first adhesive layer.

[0016] Compared with existing technologies, the technical effect achieved by adopting this technical solution is that the first adhesive layer replaces traditional screws or rivets, enabling rapid installation.

[0017] Furthermore, the fastener is a steel sleeve, which is press-fitted onto the outside of the permanent magnet and non-magnetic components through an interference fit, forming an integrated protective structure.

[0018] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: First, the steel sleeve isolates external dust and metal shavings, protecting the components inside the steel sleeve; second, the interference fit of the steel sleeve provides rigid constraint to the rotor, reducing the transmission of rotor vibration to the stator.

[0019] Furthermore, a second adhesive layer is provided between the inner surface of the steel sleeve and the outer surface of the permanent magnet.

[0020] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: the second adhesive layer, combined with the first adhesive layer, improves the pull-out resistance between the steel sleeve and the permanent magnet, and between the rotor yoke and the steel sleeve. At the same time, the second adhesive layer buffers the vibration transmission between the steel sleeve and the permanent magnet, reducing high-frequency noise.

[0021] The motor also includes a stator, which includes a stator core, the stator core having mounting protrusions that fit into adjacent stator cores.

[0022] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: the mating structure formed by the mounting protrusions reduces accumulated assembly errors, ensures the concentricity of the stator and rotor, and improves assembly accuracy. At the same time, the mounting protrusions enhance the mechanical strength of the stator core, thereby reducing the distortion of the motor's magnetic circuit.

[0023] The stator is also equipped with heat dissipation grooves, which are arranged axially along the outer periphery of the stator core.

[0024] Compared with existing technologies, the technical effects achieved by this solution are as follows: First, air flows along the stator axis to directly carry away heat, reducing stator temperature rise, which is especially suitable for high-power conditions; Second, the structure of the heat dissipation groove reduces the amount of material used without significantly reducing the mechanical strength of the stator compared with the solid structure. Attached Figure Description

[0025] Figure 1 This is an exploded schematic diagram of the rotor of a motor for a loom, according to an embodiment of the present invention.

[0026] Figure 2 A schematic diagram of the overall structure of a motor for a weaving machine according to an embodiment of this utility model;

[0027] Figure 3 for Figure 2 An explosion diagram;

[0028] Figure 4 This is a schematic diagram of the structure of a permanent magnet for a motor of a loom, according to an embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the structure of a non-magnetic component of a motor used in a loom;

[0030] Figure 6 This is a schematic diagram of the stator core of an electric motor used in a loom;

[0031] Explanation of reference numerals in the attached drawings: 100-Motor; 1-Rotor yoke; 11-Annular base; 12-Mounting part; 13-Permanent magnet; 14-Non-magnetic component; 15-Fixing component; 131-Matching part; 141-Abutting part; 21-Stator core; 22-Mounting protrusion; 23-Heat dissipation groove. Detailed Implementation

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0033] See Figures 1-6To solve the above problems, the present invention adopts the following technical solution: a motor 100 for a weaving machine, the motor 100 including: a rotor yoke 1, a permanent magnet 13, a non-magnetic component 14 and a fixing component 15, the rotor yoke 1 having an annular base 11, the annular base 11 having a mounting portion 12 in the circumferential direction; the permanent magnet 13 and the non-magnetic component 14 are alternately arranged in the mounting portion 12; the fixing component 15 is pressed onto the outside of the permanent magnet 13 and the non-magnetic component 14 to fix the permanent magnet 13 and the non-magnetic component 14; wherein, the permeability of the non-magnetic component 14 is lower than the permeability of the rotor yoke 1.

[0034] The permanent magnet 13 and the non-magnetic component 14 are fixed to the surface of the rotor yoke 1. The permanent magnet 13 and the non-magnetic component 14 are arranged alternately, and the outer layer is reinforced by pressing with fastener 15.

[0035] First, by directly and alternately fixing the permanent magnet 13 and the non-magnetic component 14 to the mounting part 12 of the rotor yoke 1, and using a press-fit fastener 15 to replace the traditional split protective component, the number of parts is reduced by more than 30%, the assembly process is simplified, the yoke slotting process is eliminated, and processing and labor costs are reduced. Second, by isolating the magnetic field of adjacent permanent magnets 13 with the non-magnetic component 14, leakage magnetic loss is reduced, and the torque density of the motor 100 is improved. Third, after the fastener 15 is press-fitted, the fastener 15, the permanent magnet 13, and the rotor yoke 1 form a closed magnetic circuit. The non-magnetic component 14 and the permanent magnet 13 are spaced apart, which reduces magnetic field distortion and magnetic resistance, and optimizes the uniformity of magnetic field distribution.

[0036] Specifically, such as Figure 1 As shown, the thickness of the non-magnetic component 14 is less than or equal to the thickness of the permanent magnet 13, and is distributed alternately along the circumference of the rotor yoke 1.

[0037] Preferably, the non-magnetic component 14 has the same thickness as the permanent magnet 13, which facilitates processing and allows for better fit with the fixing component 15 during assembly.

[0038] Preferably, the non-magnetic component 14 is made of copper, and the permanent magnet 13 is made of neodymium iron boron magnet. During processing, a piece of magnet is pasted onto the rotor yoke 1 which is coated with glue, and a copper strip is aligned with the magnet and pasted onto the yoke. This process is repeated until the magnet and copper strip are pasted together.

[0039] First, the thickness limitation of the non-magnetic component 14 reduces its blocking area on the magnetic field of the permanent magnet 13, allowing the magnetic field of the permanent magnet 13 to be more fully coupled to the rotor yoke 1, reducing magnetic leakage and improving the torque output of the motor 100. Second, it saves material costs by thinning the non-magnetic component 14, making it easier to form by stamping or extrusion, increasing processing efficiency by 25% and adapting to high-speed continuous production. Third, the alternating interval distribution ensures uniform magnetic field isolation between adjacent permanent magnets 13, reducing magnetic field distortion rate and lowering the operating noise and vibration of the motor 100.

[0040] Specifically, such as Figure 1 , Figure 4 and Figure 5 As shown, the ratio of the circumferential width of the permanent magnet 13 to the circumferential width of the non-magnetic component 14 is 6:1 to 8:1, and the circumferential width of the permanent magnet 13 is greater than the circumferential width of the non-magnetic component 14. The circumferential width refers to the width around the annular base 11 of the rotor yoke 1.

[0041] Preferably, the thickness of the non-magnetic component 14 is set to 80% of the thickness of the permanent magnet 13 to further reduce the magnetic leakage rate. At the same time, the width ratio of the permanent magnet 13 to the non-magnetic component 14 is 7:1 to reduce the torque fluctuation of the motor 100.

[0042] Firstly, by setting the ratio of the circumferential width of the permanent magnet 13 to the circumferential width of the non-magnetic component 14 to 6:1 to 8:1, with the permanent magnet 13 being wider, the material usage of the non-magnetic component 14 can be minimized while ensuring magnetic field strength, thus saving material costs. Secondly, the width ratio between the permanent magnet 13 and the non-magnetic component 14 is sufficient to generate a strong magnetic field, reducing magnetic leakage and improving magnetic circuit efficiency. Thirdly, reducing the material usage of the non-magnetic component 14 lowers the overall rotor weight, making the motor 100 structure lighter.

[0043] Specifically, see Figure 1 , Figure 4 and Figure 5 The permanent magnet 13 has fitting parts 131 on both sides, and the non-magnetic component 14 has abutting parts 141 that match the shape of the fitting parts 131. The fitting parts 131 and abutting parts 141 form a snap-fit ​​engagement along the rotor radial direction to limit the circumferential displacement of the permanent magnet 13.

[0044] Firstly, the radial engagement of the fitting part 131 and the abutment part 141 restricts the circumferential displacement of the permanent magnet 13, preventing loosening caused by centrifugal force during high-speed rotation. Secondly, the use of this engagement method eliminates the need for additional curing processes during the overall assembly of the motor 100, simplifying the assembly process and improving production efficiency.

[0045] Specifically, see Figure 5 The side of the abutting part 141 closest to the fixing member 15 is the top edge, and the side of the abutting part 141 closest to the mounting part 12 is the bottom edge. The length of the top edge along the circumference of the mounting part 12 is greater than the length of the bottom edge along the circumference of the mounting part 12.

[0046] The fixed side is longer than the bottom side, and the difference in length between the two forms a guiding structure, which allows the non-magnetic component 14 to better contact with the permanent magnet 13 during installation and prevents the non-magnetic component 14 from shifting during the pressing process.

[0047] Specifically, see Figure 1The first adhesive layer and the second adhesive layer are not shown in the figure. The surface of the mounting part 12 is treated with spraying or brushing to form the first adhesive layer. The permanent magnet 13 and the non-magnetic component 14 are fixed to the mounting part 12 through the first adhesive layer.

[0048] The first adhesive layer replaces traditional screws or rivets, enabling rapid installation.

[0049] Specifically, the fastener 15 is a steel sleeve, which is press-fitted onto the outside of the permanent magnet 13 and the non-magnetic component 14 through an interference fit to form an integrated protective structure.

[0050] For example, the steel sleeve is split into two parts axially and then pressed together by bolts.

[0051] For example, the inner surface of the steel sleeve is nickel-plated to enhance rust resistance, making it suitable for the high humidity environment of textile workshops.

[0052] Firstly, the steel sleeve isolates external dust and metal shavings, protecting the components inside the steel sleeve; secondly, the interference fit of the steel sleeve provides rigid constraint to the rotor, reducing the transmission of rotor vibration to the stator.

[0053] Specifically, a second adhesive layer is provided between the inner surface of the steel sleeve and the outer surface of the permanent magnet 13.

[0054] For example, the adhesive layer material is made of high-temperature resistant epoxy resin to adapt to the high-load conditions of the motor.

[0055] The second adhesive layer, combined with the first adhesive layer, enhances the pull-out resistance between the steel sleeve and the permanent magnet 13, and between the rotor yoke 1 and each other. At the same time, the second adhesive layer buffers the vibration transmission between the steel sleeve and the permanent magnet 13, reducing high-frequency noise.

[0056] See Figure 2 , Figure 3 and Figure 6 The motor 100 also includes a stator, which includes a stator core 21. The stator core 21 is provided with mounting protrusions 22, which are fitted into adjacent stator cores 21.

[0057] The fitted structure formed by the mounting protrusion 22 reduces the cumulative assembly error, ensures the concentricity of the stator and rotor, and improves the assembly accuracy. At the same time, the mounting protrusion 22 enhances the mechanical strength of the stator core 21, thereby reducing the magnetic circuit distortion of the motor 100.

[0058] See Figure 6 The stator is also provided with a heat dissipation groove 23, which is axially arranged along the outer periphery of the stator core 21.

[0059] First, the air flows along the stator axis and carries away heat directly, reducing the stator temperature rise, which is especially suitable for high-power applications. Second, compared with a solid structure, the structure of the heat sink 23 reduces the amount of material used without significantly reducing the mechanical strength of the stator.

[0060] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A motor for a loom, characterized by, The motor comprises: a rotor yoke (1) provided with an annular base body (11) circumferentially provided with a mounting portion (12); a plurality of permanent magnets (13) and non-magnetic members (14) alternately and spacedly arranged in the mounting portion (12); a fixing member (15) press-fitted on the outer side of the permanent magnets (13) and the non-magnetic members (14) to fix the permanent magnets (13) and the non-magnetic members (14). The magnetic permeability of the non-magnetic members (14) is lower than that of the rotor yoke (1).

2. The electric machine of claim 1, wherein, The thickness of the non-magnetic members (14) is less than or equal to the thickness of the permanent magnets (13) and alternately and spacedly distributed along the circumference of the rotor yoke (1).

3. The electric machine of claim 1, wherein, The ratio of the circumferential width of the permanent magnets (13) to the circumferential width of the non-magnetic members (14) is 6:1 to 8:1, and the circumferential width of the permanent magnets (13) is greater than the circumferential width of the non-magnetic members (14).

4. The electric machine of claim 1, wherein, The permanent magnets (13) are provided with fitting portions (131) on both sides, and the non-magnetic members (14) are provided with abutting portions (141) matching the shape of the fitting portions (131), and the fitting portions (131) and the abutting portions (141) form a clamping fit along the radial direction of the rotor to limit the circumferential displacement of the permanent magnets (13).

5. The electric machine of claim 4, wherein, The side of the abutting portion (141) close to the fixing member (15) is a top edge, and the side of the abutting portion (141) close to the mounting portion (12) is a bottom edge, and the length of the top edge along the circumference of the mounting portion (12) is greater than the length of the bottom edge along the circumference of the mounting portion (12).

6. The electric machine of claim 1, wherein, The surface of the mounting portion (12) is treated by spraying or brushing glue to form a first adhesive layer, and the permanent magnets (13) and the non-magnetic members (14) are fixed to the mounting portion (12) through the first adhesive layer.

7. The electric machine of claim 6, wherein: The fixing member (15) is a steel sleeve, which is press-fitted on the outer side of the permanent magnets (13) and the non-magnetic members (14) through interference fit to form an integrated protective structure.

8. The electric machine of claim 7, wherein: A second adhesive layer is provided between the inner surface of the steel sleeve and the outer surface of the permanent magnet (13).

9. The electric machine of any of claims 1-8, wherein, The motor further comprises a stator, and the stator comprises: a stator core (21) provided with a mounting protrusion (22) fitted into adjacent stator cores (21).

10. The electric machine of claim 9, wherein, The stator is further provided with a heat dissipation groove (23) axially penetrating along the outer periphery of the stator core (21).

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