Combined electric tool commutator

Abstract

The utility model discloses a combined electric tool commutator, which relates to the technical field of commutators and comprises a commutator main body and a combined rotating component, the commutator main body comprises commutator segments, mica rings, reinforcing rings and an annular cylindrical base, the mica rings are fixedly mounted on the inner surfaces of the commutator segments, the reinforcing rings are arranged on the inner sides of the commutator segments, and the annular cylindrical base is fixedly mounted on the outer surfaces of the commutator segments. A ring-column-shaped base is fixed to the outer surface of the reinforcing ring, the ring-column-shaped base is connected with a combined rotating component, the combined rotating component comprises a rotating ring, a rotating disc, a connecting component and a rotating connecting base, the rotating ring and the rotating disc are detachably connected through the connecting component, one face of the rotating ring is fixedly connected to one end of the ring-column-shaped base, and the other face of the rotating ring is fixedly connected to the other end of the ring-column-shaped base. According to the commutator, through modular design and flexible connection parts, safe and stable operation of a motor control system is ensured, and meanwhile, replacement and maintenance of the parts are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of commutators, in particular to a combined commutator for electric tools. Background Art

[0002] Traditional commutators for electric tools usually adopt an integrated design, that is, the commutation functional components are directly integrated inside the motor or between the motor and the tool output shaft. Although this design is structurally compact, there are many limitations in practical applications. Due to the high integration of components, once the commutator fails, it often needs to be replaced as a whole, increasing the maintenance cost. When repairing, it is necessary to disassemble the entire motor or tool, and the process is complex and time-consuming. With the rapid development of the electric tool industry, the market has put forward higher requirements for the performance, reliability, maintenance convenience and cost-effectiveness of electric tools. It is required to be easy to manufacture, assemble and repair, reduce production costs and maintenance costs. It can quickly adapt to the needs of different specifications and application scenarios, improve the market competitiveness of products, and improve commutation efficiency and reduce energy loss on the premise of ensuring stability. In summary, a combined commutator for electric tools is proposed, which solves many limitations of traditional commutators, improves the performance and service life of electric tools, and meets the working requirements under complex working conditions. Summary of the Utility Model

[0003] The utility model aims to solve at least to some extent the combined technical problems of the commutator of electric tools. For this purpose, the utility model proposes a combined commutator for electric tools.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a combined commutator for electric tools, which specifically includes a commutator body and a combined rotating component. The commutator body includes commutator segments, mica rings, reinforcing rings and cylindrical bases. A mica ring is fixedly installed on the inner surface of the commutator segments. A reinforcing ring is arranged inside the commutator segments. The outer surface of the reinforcing ring is fixed with a cylindrical base. The cylindrical base is arranged to connect the combined rotating component. The combined rotating component includes a rotating ring, a rotating disk, a connecting component and a rotating connecting seat. The rotating ring and the rotating disk are detachably connected through the connecting component. One side of the rotating ring is fixedly connected to one end of the cylindrical base, and one side of the rotating disk is connected to the rotating connecting seat.

[0005] In a preferred embodiment of the utility model, the connecting component includes a screw, a locking nut, a connecting piece and a connecting notch. The connecting piece is arranged between the rotating ring and the rotating disk. One end of the screw passes through the connecting piece and is fixed on the connecting notch of the rotating ring, and the other end is arranged on the connecting notch of the rotating disk through the locking nut.

[0006] In a preferred embodiment of the present utility model, the rotating connection seat includes a fixed disc, a connecting shaft, a bearing and a fixing member. One end of the connecting shaft is connected to the rotating disc. The connecting shaft is rotatably connected to the inside of the fixed disc through the bearing. The fixing member is arranged on one side of the fixed disc.

[0007] In a preferred embodiment of the present utility model, a sealing member is arranged at the connection between the fixed disc and the bearing.

[0008] In a preferred embodiment of the present utility model, the connecting slots are arranged in a circumferential array on the outer sides of the rotating ring and the rotating disc.

[0009] In a preferred embodiment of the present utility model, insulating gaps are formed on the outer surface of the commutator segment.

[0010] In a preferred embodiment of the present utility model, a plurality of bolts are arranged on the circumferential outer side of the fixed disc.

[0011] The beneficial effects of the present utility model are as follows: After adopting the above structure, the design of separating the commutator main body from the combined rotating components makes the structure of the entire commutator more modular, facilitating manufacturing and assembly. Moreover, when replacement or maintenance is required, the corresponding components can be disassembled and replaced separately, greatly reducing the maintenance cost and time. The design of the connecting components enables a detachable connection between the rotating ring and the rotating disc, improving the flexibility of the components and allowing users to replace different specifications or worn components according to needs, thereby extending the service life of the entire commutator. The rotating connection seat ensures the stability and accuracy of the rotating disc during high-speed rotation. In summary, through the modular design, flexible connecting components, stable rotating structure, enhanced sealing and insulation properties, as well as convenient installation and fixing methods, the present utility model significantly improves the performance, reliability and maintenance convenience of the combined electric tool commutator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the main structure of the present utility model;

[0013] Figure 2 is a three-dimensional structure diagram of the present utility model;

[0014] Figure 3 is a cross-sectional structure diagram of the present utility model;

[0015] In the figure: 1 - commutator segment, 2 - mica ring, 3 - reinforcing ring, 4 - cylindrical base, 5 - rotating ring, 6 - rotating disc, 7 - rotating connection seat, 8 - screw rod, 9 - locking nut, 10 - connecting piece, 11 - connecting slot, 12 - fixed disc, 13 - connecting shaft, 14 - bearing, 15 - fixing member, 16 - sealing member, 17 - insulating gap, 18 - bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0017] As Figure 1 - Figure 3 shown, a commutator for a combined electric tool, which specifically includes a commutator body and a combined rotating component. The commutator body includes commutator segments 1, mica rings 2, reinforcing rings 3, and a cylindrical base 4. A mica ring 2 is fixedly installed on the inner surface of the commutator segment 1, a reinforcing ring 3 is arranged inside the commutator segment 1, a cylindrical base 4 is fixed on the outer surface of the reinforcing ring 3, and the cylindrical base 4 is arranged to connect the combined rotating component. The commutator segment 1 on the commutator body is a key component for current commutation, ensuring that the current flow direction can be smoothly switched when the motor rotates in different directions. During the rotation of the motor, through contact with the carbon brush, periodic commutation of the current is achieved, driving the motor to continuously rotate. The mica ring 2 has good insulation performance and high-temperature resistance characteristics, which can protect the commutator segment 1 from electrical breakdown and overheating damage, provide electrical isolation for the commutator segment 1, and ensure the stability and safety of the current during commutation; the reinforcing ring 3 enhances the overall mechanical strength of the commutator, prevents deformation or damage during high-speed rotation, and provides additional support for the commutator segment 1. The cylindrical base 4 serves as the foundation of the commutator body, facilitating connection and fixation with other components; the combined rotating component includes a rotating ring 5, a rotating disk 6, a connecting component, and a rotating connection seat 7. The rotating ring 5 and the rotating disk 6 are detachably connected through the connecting component. One side of the rotating ring 5 is fixedly connected to one end of the cylindrical base 4, and one side of the rotating disk 6 is connected to the rotating connection seat 7. In practice, the rotating ring 5 is responsible for transmitting the rotational power from the motor or the cylindrical base 4 to the rotating disk 6. The rotating disk 6 receives the rotational power from the rotating ring 5 and further transmits it to the rotating connection seat 7, thereby driving an external load. The connecting component enables the rotating ring 5 and the rotating disk 6 to be detachably connected, facilitating component replacement and maintenance. The rotating connection seat 7, as the end part of the combined rotating component, is responsible for outputting the rotational power to the external load and is the interface between the motor and the external device, ensuring that the driving force of the motor can effectively act on the external device.

[0018] As Figure 2As shown, on the basis of the above method, further, the connecting component includes a screw 8, a locking nut 9, a connecting piece 10 and a connecting notch 11. The connecting piece 10 is arranged between the rotating ring 5 and the rotating disc 6. One end of the screw 8 passes through the connecting piece 10 and is fixed on the connecting notch 11 of the rotating ring 5, and the other end is arranged on the connecting notch 11 of the rotating disc 6 through the locking nut 9. The connecting notches 11 are arranged in a circumferential array on the outer sides of the rotating ring 5 and the rotating disc 6. In implementation, the connecting piece 10 is arranged between the rotating ring 5 and the rotating disc 6. When the screw 8 is tightened, the stress can be dispersed. The connecting piece 10 increases the contact area between the rotating ring 5 and the rotating disc 6, reduces looseness caused by vibration or impact. The screw 8 plays a fastening role and can also transmit torque. When the motor works, the screw 8 will bear the rotating force from the rotating ring 5 and transmit it to the rotating disc 6 to ensure the continuous transmission of power. By adjusting the tightening degree of the locking nut 9, the gap between the rotating ring 5 and the rotating disc 6 can be finely adjusted to adapt to different working conditions and requirements. The connecting notches 11 enhance the structural strength of the rotating ring 5 and the rotating disc 6, provide additional support points for the screw 8, and make the entire connecting component more durable.

[0019] As Figure 2 shown, on the basis of the above method, further, the rotating connecting seat 7 includes a fixed disc 12, a connecting shaft 13, a bearing 14 and a fixing piece 15. One end of the connecting shaft 13 is connected to the rotating disc 6. The connecting shaft 13 is rotatably connected in the fixed disc 12 through the bearing 14, and the fixing piece 15 is arranged on one side of the fixed disc 12. A sealing member 16 is arranged at the connection between the fixed disc 12 and the bearing 14. A plurality of bolts 18 are arranged on the circumferential outer side of the fixed disc 12. In implementation, the fixed disc 12 serves as the basic supporting part of the connecting seat. The connecting shaft 13 connects the rotating disc 6 and the fixed disc 12 to realize the rotating function of the rotating disc 6. The bearing 14 enables it to rotate freely in the fixed disc 12. The fixing piece 15 is used to fix and support the connecting seat 7. The sealing member 16 is arranged at the connection between the fixed disc 12 and the bearing 14 to prevent external impurities such as dust and moisture from entering the bearing interior and protect the bearing from damage.

[0020] As Figure 1 shown, on the basis of the above method, further, an insulating gap 17 is provided on the outer surface of the commutator segment 1. In implementation, the main function of the insulating gap 17 is to provide electrical insulation and isolate the circuits between the commutator segments. This is to avoid electrical short circuits between the commutator segments, ensure the safe and stable operation of the motor control system, and facilitate maintenance in case of a single commutator segment failure or damage.

[0021] As Figure 2 shown, on the basis of the above method, further, the plurality of bolts 18 on the circumferential outer side of the fixed disc facilitate firmly fixing the rotating connecting seat 7, improving the stability and reliability of the overall structure.

[0022] In the specific working process of the new combined electric tool commutator, when the motor starts, current passes through the commutator segment 1 of the commutator body. As a key component for current commutation, the commutator segment 1 realizes the periodic commutation of current through contact with the carbon brush. In this way, the motor can smoothly switch the current flow direction in different rotation directions, driving the motor to rotate continuously. The mica ring 2 protects the commutator segment 1 from electrical breakdown and overheating damage due to its good insulation performance and high temperature resistance. The insulation gap 17 also further provides electrical insulation, isolating the circuits between the commutator segments to ensure the safe and stable operation of the motor control system. The reinforcing ring 3 enhances the overall mechanical strength of the commutator, preventing deformation or damage during high-speed rotation. The rotational power of the motor or the cylindrical base 4 is transmitted to the rotating disk 6 through the rotating ring 5. A detachable connection is achieved between the rotating ring 5 and the rotating disk 6 through the connecting component, facilitating the replacement and maintenance of the components. The connecting piece 10 increases the contact area between the rotating ring 5 and the rotating disk 6, reducing looseness caused by vibration or impact. The rotating disk 6 receives the rotational power from the rotating ring 5 and transmits the power to the rotating connection seat 7 through the connecting shaft 13. The bearing 14 on the rotating connection seat 7 enables free rotation within the fixed disk 12, thus ensuring smooth rotation. The rotating connection seat 7 is responsible for outputting the rotational power to the external load and is the interface between the motor and the external device, ensuring that the driving force of the motor can effectively act on the external device. In summary, through the precisely designed commutator body and combined rotating components, the new combined electric tool commutator realizes smooth commutation and power transmission of the motor, ensures the safe and stable operation of the motor control system, and is convenient for component replacement and maintenance.

[0023] In the description of this specification, the description with reference to terms such as "one embodiment", "certain embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the said embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0024] In summary, although the present invention has been disclosed above with the preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those of ordinary skill in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is subject to the scope defined by the claims.

Claims

1. The commutator of a combined electric tool, which specifically includes a commutator body and a combined rotating component, is characterized in that: The commutator body includes commutator segments (1), mica rings (2), reinforcing rings (3), and a cylindrical base (4). The mica ring (2) is fixedly installed on the inner surface of the commutator segment (1). The reinforcing ring (3) is arranged inside the commutator segment (1). The outer surface of the reinforcing ring (3) is fixed with the cylindrical base (4). The cylindrical base (4) is provided with a connecting and combined rotating component. The combined rotating component includes a rotating ring (5), a rotating disc (6), a connecting component, and a rotating connection seat (7). The rotating ring (5) and the rotating disc (6) are detachably connected by the connecting component. One side of the rotating ring (5) is fixedly connected to one end of the cylindrical base (4), and one side of the rotating disc (6) is connected to the rotating connection seat (7).

2. The commutator of the combined electric tool according to claim 1, characterized in that: The connecting component includes a screw (8), a locking nut (9), a connecting piece (10), and a connecting notch (11). The connecting piece (10) is arranged between the rotating ring (5) and the rotating disc (6). One end of the screw (8) passes through the connecting piece (10) and is fixed on the connecting notch (11) of the rotating ring (5), and the other end is arranged on the connecting notch (11) of the rotating disc (6) through the locking nut (9).

3. The combined electric tool commutator according to claim 1, wherein: The rotating connection seat (7) includes a fixed disc (12), a connecting shaft (13), a bearing (14), and a fixing member (15). One end of the connecting shaft (13) is connected to the rotating disc (6). The connecting shaft (13) is rotatably connected inside the fixed disc (12) through the bearing (14). The fixing member (15) is arranged on one side of the fixed disc (12).

4. The commutator of the combined electric tool according to claim 3, characterized in that: A seal (16) is provided at the connection between the fixed disc (12) and the bearing (14).

5. The combined electric tool commutator according to claim 2, characterized in that: The connecting notches (11) are arranged in a circumferential array on the outer sides of the rotating ring (5) and the rotating disc (6).

6. The combined electric tool commutator according to claim 1, characterized in that: An insulating gap (17) is formed on the outer surface of the commutator segment (1).

7. The combined electric tool commutator according to claim 3, characterized in that: A plurality of bolts (18) are arranged on the circumferential outer side of the fixed disc (12).

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