Straight bar type spliced stator, motor, electric vehicle and electric tool

Abstract

The utility model provides a straight bar type spliced stator, a motor, an electric vehicle and an electric tool. The straight bar type spliced stator comprises a pin, a silicon steel sheet group and a coil, the plurality of silicon steel sheet groups are sequentially connected end to end through the pins to form a circular ring shape, and the coil is wound on each silicon steel sheet group. Not only is the manufacturing process simplified, but also the problems of inter-chip short circuit and heat effect possibly occurring in the welding process are effectively avoided, and the electromagnetic performance is improved. The pin connection also has higher connection strength and stability, and can better adapt to the mechanical stress in the operation of the motor.

Description

Technical Field

[0001] This utility model relates to the field of motors, specifically to a straight-bar modular stator, a motor, an electric vehicle, and power tools. Background Technology

[0002] The stator and rotor of an electric motor are its core components, playing crucial roles in generating the magnetic field and converting energy, respectively. The stator is the stationary part of the motor, mainly consisting of the iron core and windings. The iron core is made of laminated silicon steel sheets, reducing eddy current losses and providing the magnetic circuit. The windings are embedded in the slots of the iron core, generating a magnetic field when energized, thereby driving the rotor to rotate. Therefore, the stator core structure design directly affects the motor's performance and production efficiency.

[0003] Patent document CN220190542U discloses a modular stator core, a motor, and a vehicle. Specifically, its embodiments disclose that "the core structure 100 is equipped with a welding groove 102 for welding between two adjacent core structures 100. For example, the welding groove 102 is located on the outer edge of the core structure 100, and a protrusion may be provided within the welding groove 102 to facilitate welding between the core structures 100." This connection method is relatively complex, and inter-laminar short circuits and thermal effects that may occur during welding can reduce the electromagnetic performance of the stator. Utility Model Content

[0004] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a straight-bar modular stator, motor, electric vehicle and power tool.

[0005] According to the present invention, a straight-bar modular stator includes: pins, silicon steel sheet groups, and coils;

[0006] Multiple silicon steel sheet groups are connected end to end in a circular shape by the pins, and the coils are wound around each silicon steel sheet group.

[0007] Furthermore, the silicon steel sheet assembly comprises multiple layers of silicon steel sheets stacked on top of each other.

[0008] Furthermore, an insulating layer is provided between two adjacent layers of silicon steel sheets.

[0009] Furthermore, the multi-layered silicon steel sheets are divided into an upper half and a lower half;

[0010] The upper half of the silicon steel sheet has a first extension extending to one side, and the lower half of the silicon steel sheet has a second extension extending to the opposite side.

[0011] The first extension of one silicon steel sheet assembly is arranged vertically overlapping the second extension of another adjacent silicon steel sheet assembly.

[0012] Furthermore, a first pin hole is provided on the first extension portion along the stacking direction, and a second pin hole is provided on the second extension portion along the stacking direction;

[0013] A pin is inserted into the first pin hole of the first overlapping extension and the second pin hole of the second extension.

[0014] Furthermore, the silicon steel sheet assembly includes a winding portion, and the coil is wound around the winding portion.

[0015] Furthermore, the end of the winding portion has a limiting portion for limiting the coil.

[0016] The present invention provides an electric motor comprising the aforementioned straight-bar modular stator.

[0017] An electric vehicle according to the present invention includes the aforementioned motor.

[0018] An electric tool according to the present invention includes the aforementioned motor.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In this utility model, the individual silicon steel laminations are arranged in a tightly fitted pattern, further reducing waste and material waste between laminations, thus lowering production costs. The produced laminations are stacked to form a whole, with pin connections at the joints, replacing traditional welding processes and significantly reducing processing difficulty and labor costs. Simultaneously, the pin connection effectively reduces the defect rate caused by poor welding, improving the overall quality and consistency of the product. The pin connection structure is relatively simple, easy to disassemble and replace. In case of malfunction or damage, it can be quickly replaced or repaired; moreover, the pin connection can withstand vibration and variable loads, ensuring the stability of the stator during operation. Attached Figure Description

[0021] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 A top view of a straight-bar modular stator;

[0023] Figure 2 This is a side view of a straight-bar modular stator;

[0024] Figure 3 A schematic diagram showing the connection relationships between multiple silicon steel sheet groups;

[0025] Figure 4A side view of a single silicon steel sheet assembly. Detailed Implementation

[0026] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0027] like Figure 1 and Figure 2 As shown, this embodiment provides a straight-bar modular stator, comprising multiple components: pins 1, silicon steel sheet groups 2, and coils 3. (As shown...) Figure 3 As shown, multiple silicon steel sheet groups 2 are connected end-to-end in a circular shape by pins 1. Each silicon steel sheet group 2 includes a winding part 201, around which a coil 3 is wound. The end of the winding part 201 has a limiting part 202 for limiting the coil 3. The straight-bar modular stator is connected end-to-end by pins to ensure a tight connection between the stator ends, forming a complete closed loop. This connection method abandons the traditional welding process, reducing the process difficulty and improving the yield rate. The pin connection allows for disassembly and replacement in case of damage. The straight-bar modular stator with pin connection can disperse and absorb the impact force from vibration during operation, preventing the stator from loosening or deforming due to vibration, thereby improving product reliability.

[0028] like Figure 2 and Figure 4 As shown, silicon steel sheet group 2 includes multiple layers of silicon steel sheets stacked together, which allows the lamination units to fit tightly together, improving material utilization and reducing waste, thereby lowering costs. An insulating layer is provided between adjacent layers of silicon steel sheets to prevent short circuits between layers and to reduce eddy current losses in the stator.

[0029] like Figure 4 As shown, the multi-layered stacked silicon steel sheets are divided into an upper half and a lower half. The upper half of the silicon steel sheet has a first extension 4 extending to one side, and the lower half of the silicon steel sheet has a second extension 5 extending to the opposite side. The first extension 4 of one silicon steel sheet group 2 overlaps with the second extension 5 of another adjacent silicon steel sheet group 2. A first pin hole 401 is formed on the first extension 4 along the stacking direction, and a second pin hole 501 is formed on the second extension 5 along the stacking direction. A pin 1 passes through both the first pin hole 401 of the overlapping first extension 4 and the second pin hole 501 of the second extension 5.

[0030] The silicon steel sheet assembly 2 of this invention is formed by stacking two types of silicon steel sheets. A thin layer of insulating material is coated between each two layers to prevent short circuits between stator layers and reduce eddy current losses in the stator. The stacked silicon steel sheet assembly 2 protrudes to the left at one end and to the right at the other. This structure not only enhances the flexibility of its connection but also improves the overall stability. By using pins to connect the ends of the silicon steel sheet assembly 2, a tight connection between the ends is ensured, thus forming a complete closed loop. This connection method not only facilitates assembly and disassembly but also effectively reduces loosening caused by vibration or external forces, lowers processing difficulty and labor costs, reduces the defect rate caused by poor welding, improves product consistency and quality, and significantly enhances manufacturing efficiency and product quality.

[0031] This invention can be used in electric motors. The connection method described in the above embodiments not only simplifies the manufacturing process but also effectively avoids inter-piece short circuits and thermal effects that may occur during welding, thus improving electromagnetic performance. The pin connection also provides higher connection strength and stability, better adapting to the mechanical stresses during motor operation. In this way, the straight-bar modular stator core optimizes the motor's performance and efficiency while ensuring structural strength.

[0032] The motor of this invention can be used in electric vehicles and power tools that require motors, such as robotic arms and cutting machines.

[0033] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A straight-bar modular stator, characterized in that, include: Pin (1), silicon steel sheet assembly (2), and coil (3); Multiple silicon steel sheet groups (2) are connected end to end in a ring shape by pins (1), and coils (3) are wound around each silicon steel sheet group (2).

2. The straight-bar modular stator according to claim 1, characterized in that, The silicon steel sheet assembly (2) comprises multiple layers of silicon steel sheets stacked on top of each other.

3. The straight-bar modular stator according to claim 2, characterized in that, An insulating layer is provided between two adjacent layers of silicon steel sheets.

4. The straight-bar modular stator according to claim 2, characterized in that, The multi-layered silicon steel sheets are divided into an upper half and a lower half; The upper half of the silicon steel sheet has a first extension (4) extending to one side, and the lower half of the silicon steel sheet has a second extension (5) extending to the opposite side. The first extension (4) of one silicon steel sheet group (2) is arranged vertically overlapping the second extension (5) of another adjacent silicon steel sheet group (2).

5. The straight-bar modular stator according to claim 4, characterized in that, The first extension (4) has a first pin hole (401) along the stacking direction, and the second extension (5) has a second pin hole (501) along the stacking direction. A pin (1) is inserted into the first pin hole (401) of the first overlapping extension (4) and the second pin hole (501) of the second extension (5).

6. The straight-bar modular stator according to claim 1, characterized in that, The silicon steel sheet assembly (2) includes a winding portion (201), and the coil (3) is wound around the winding portion (201).

7. The straight-bar modular stator according to claim 6, characterized in that, The end of the winding portion (201) has a limiting portion (202) for limiting the coil (3).

8. An electric motor, characterized in that, Includes the straight-bar modular stator as described in any one of claims 1-7.

9. An electric vehicle, characterized in that, Includes the motor as described in claim 8.

10. A power tool, characterized in that, Includes the motor as described in claim 8.

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