Driving motor, magneto-electric starting device of driving motor and chain saw of magneto-electric starting device

Abstract

The utility model relates to a driving motor, a magneto-electric starting device thereof and a chain saw, and aims to at least solve the problem that an electric starting mechanism of a chain saw in the existing market is not easy to use, the driving motor comprises a stator assembly and a rotor assembly which is matched with the stator assembly and can rotate relative to the stator assembly, and a rotating magnetic field is generated through the stator assembly. The motor is arranged on the rotor assembly and acts on the rotor assembly to generate electromagnetic torque, so that rotation of the rotor assembly is achieved, the rotor assembly comprises a rotor shell and a flywheel assembly fixed to the rotor shell in an integrated or split mode, and a coupling mechanism used for being matched with an ignition assembly to enable the ignition assembly to ignite is arranged on the flywheel assembly.

Description

Technical Field

[0001] This application relates to a drive motor, its magneto electric starting device, and a chainsaw. Background Technology

[0002] The magneto mechanism used for engine ignition on existing chainsaws is generally an external rotor magneto, such as the magneto mechanism disclosed in Chinese Utility Model Patent No. CN201766477U. It consists of a rotor assembly and a stator assembly. The stator assembly includes a fixed base plate, a power coil, an ignition coil, and an igniter. The power coil and ignition coil are assembled on the fixed base plate and then fixedly mounted on the engine housing. The rotor assembly is mounted on the engine crankshaft and rotates with the crankshaft. The rotor assembly includes a rotor, a magnetic pole core, and magnets. Through the rotation of the rotor assembly, the stator assembly cuts the magnetic lines of force of the rotating magnetic poles of the rotor assembly, inducing a current in the power coil, thereby causing the secondary winding of the ignition coil to generate a high voltage output of more than 20KV to ignite the engine.

[0003] In the above structure, the rotor assembly is generally driven to rotate by pulling a rope. That is, a rope is wrapped around the rotor assembly, and the rotor assembly is rotated by pulling the rope with a handle. Ignition is relatively difficult.

[0004] Chinese utility model patent CN220151463U discloses an electric start chainsaw. The chainsaw body contains an engine and a flywheel that rotates synchronously with the engine. A rope pulley is located on the outside of the flywheel, and a starter disc is mounted on the flywheel. When the rope pulley rotates, it drives the starter disc to rotate in one direction. The chainsaw body has a starter motor that drives the starter disc and a reset / extinguishing switch that controls the starter motor's opening and closing. When the starter motor is turned on, it drives the starter disc to rotate, and the flywheel connected to the starter disc also rotates synchronously. When the speed exceeds the minimum ignition speed of the flywheel, the engine can ignite and start normally for rapid start-up. The engine can also be started by pulling a rope, allowing the user to flexibly choose between electric motor and manual starting methods according to actual needs.

[0005] The problem with the above structure is its complexity, numerous parts, and the resulting relatively large size of the chainsaw. Summary of the Invention

[0006] The purpose of this application is to provide an electric motor and its magneto electric starting device and a chainsaw, so as to at least solve the problem that the electric starting mechanism of existing chainsaws on the market is not working well.

[0007] To achieve the above objectives, this application provides a drive motor, including a stator assembly and a rotor assembly that cooperates with the stator assembly and is rotatable relative to the stator assembly. The rotation of the rotor assembly is achieved through electromagnetic induction between the stator assembly and the rotor assembly. The rotor assembly includes a rotor housing sleeved outside the stator assembly and a flywheel assembly that is integrally or separately fixed to the rotor housing. The flywheel assembly is provided with a coupling mechanism for cooperating with an ignition assembly to ignite the ignition assembly.

[0008] Preferably, a rotor is fixed to the inner wall of the rotor housing, and a magnet is provided on the rotor.

[0009] Preferably, the magnets are evenly spaced on the inner sidewall of the rotor.

[0010] Preferably, the rotor housing is fixedly connected to a rotating shaft that passes through the stator assembly, the stator assembly is provided with a through hole for the rotating shaft to pass through, and there is a gap between the inner wall of the through hole and the rotating shaft.

[0011] Preferably, the flywheel assembly includes an integral or separate flywheel disposed on the outer wall of the rotor housing.

[0012] Preferably, the flywheel is provided with fan blades.

[0013] Preferably, the rotor assembly has a shaft passing through the stator assembly, the stator assembly has a through hole for the shaft to pass through, and a gap for accommodating lubricating oil is formed between the inner wall of the through hole and the shaft.

[0014] Preferably, the stator assembly is provided with an oil seal mechanism on the side opposite to the rotor assembly.

[0015] Preferably, the oil seal mechanism includes an oil seal plate sleeved on the rotating shaft, and the oil seal plate and the stator assembly are circumferentially positioned by at least a locating pin.

[0016] Preferably, the oil seal plate has a screw hole through which the positioning pin passes, and the inner wall of the through hole of the stator assembly has a positioning groove that mates with the positioning pin.

[0017] This application also relates to a magneto electric starting device, including an ignition assembly and a drive motor, characterized in that the drive motor includes the drive motor described above, the drive motor cooperates with the ignition assembly through a coupling mechanism, and through the rotation of the rotor assembly, the ignition assembly cuts the magnetic field lines of the coupling mechanism to achieve discharge ignition.

[0018] This application also relates to a chainsaw, including a chainsaw body, wherein the chainsaw body is provided with a magneto-electric starting device as described above.

[0019] Based on the above, the beneficial effects of this application are:

[0020] This application sets the rotor assembly of the drive motor to include a rotor housing and a flywheel assembly fixed to the rotor housing. The flywheel assembly is provided with a coupling mechanism for cooperating with the ignition assembly to ignite the ignition assembly. This allows the drive motor to be used for electric discharge ignition of the ignition assembly and electric starting of chainsaws. It has the advantages of simple and compact structure, small size and low cost. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of this application. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the overall structure of this application. Figure 2 ;

[0024] Figure 3 This is an exploded view of this application. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described and explained below in conjunction with the accompanying drawings and embodiments.

[0026] It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided herein without inventive effort are within the scope of protection of this application. Furthermore, it is understood that although the effort involved in such development may be complex and lengthy, for those skilled in the art related to the content disclosed herein, modifications to design, manufacturing, or production based on the technical content disclosed herein are merely conventional technical means and should not be construed as insufficient disclosure of this application.

[0027] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0028] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "a," "an," "an," "the," and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms "comprising," "including," "having," and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms "connected," "linked," "coupled," and similar terms used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Multiple" in this application means two or more. " / " and "and / or" describe the relationship between related objects; " / " means "or," for example, "A / B" can mean: A exists alone or B exists alone; "and / or" indicates that three relationships can exist, for example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, and B exists alone. The terms "first," "second," "third," etc., used in this application are merely to distinguish similar objects and do not represent a specific ordering of objects.

[0029] See Figures 1 to 3 The drive motor in this embodiment mainly includes a stator assembly and a rotor assembly that is sleeved on the outside of the stator assembly and can rotate relative to the stator assembly. The stator assembly includes a stator core 1, and the stator slots 11 of the stator core have coil windings (not shown in the figure). The rotor assembly includes a rotor housing 2, and a rotor 21 is embedded in the inner wall of the rotor housing. Magnets 22 are provided on the rotor, and the magnets are evenly spaced and embedded in the inner side wall of the rotor. When the coil windings are energized, the rotor assembly rotates through electromagnetic induction between the stator assembly and the rotor assembly. Alternatively, magnets can be provided on the stator assembly and coil windings can be provided on the rotor assembly to achieve relative rotation between the stator assembly and the rotor assembly, which are both existing technologies.

[0030] The rotor housing is fixedly connected to a rotating shaft 23 that passes through the stator core of the stator assembly. The rotor housing and one end of the rotating shaft are connected by a key to achieve relative positioning in the circumferential direction and to prevent them from separating from each other in the axial direction. The stator core of the stator assembly is provided with a through hole 12 for the rotating shaft to pass through. A gap is formed between the inner wall of the through hole and the rotating shaft for accommodating lubricating oil (grease, machine oil, etc.). The side of the stator assembly away from the rotor assembly is provided with an oil seal mechanism.

[0031] Specifically, the oil seal mechanism includes an oil seal plate 3 sleeved on the rotating shaft, and the oil seal plate and the stator assembly are circumferentially positioned by at least a locating pin (not shown in the figure). Preferably, in this embodiment, the oil seal plate is provided with a screw hole 31 for the locating pin to pass through, and the inner wall of the through hole of the stator core of the stator assembly is provided with a locating groove 13 that cooperates with the locating pin.

[0032] In this embodiment, a flywheel assembly is fixed integrally or separately on the rotor housing. The flywheel assembly includes a flywheel 4 integrally or separately disposed on the outer wall of the rotor housing. The flywheel is provided with fan blades 41. The flywheel assembly is provided with a coupling mechanism 42 for cooperating with the ignition assembly to ignite the ignition assembly.

[0033] The ignition assembly can be a magnetic coupling mechanism that works with the ignition assembly. Specifically, the coupling mechanism includes a power coil, an ignition coil, and an igniter. The coupling mechanism includes a magnetic pole core and a magnet on the rotor assembly. By rotating the rotor assembly, the ignition assembly cuts the magnetic lines of force of the rotating magnetic pole of the magnetic coupling mechanism, inducing a current in the power coil, thereby causing the ignition coil to discharge and ignite.

[0034] In addition, this application also relates to a magneto electric starting device / mechanism (not shown in the figure), including an ignition assembly and a drive motor, characterized in that the drive motor includes the drive motor described above, the drive motor cooperates with the ignition assembly through a coupling mechanism, and through the rotation of the rotor assembly, the ignition assembly cuts the magnetic field lines of the coupling mechanism to achieve discharge ignition.

[0035] In addition, this application also relates to a chainsaw (not shown in the figure), including a chainsaw body, an engine inside the chainsaw body, and a magneto electric starter as described above on the chainsaw body. The rotor assembly can be connected to the crankshaft of the engine, and the ignition assembly can be connected to the chainsaw body or the engine housing. The specific structure is not limited here, as long as they can cooperate to achieve electric start of the chainsaw engine.

[0036] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A drive motor, comprising a stator assembly and a rotor assembly that cooperates with and is rotatable relative to the stator assembly, wherein the rotation of the rotor assembly is achieved through electromagnetic induction between the stator assembly and the rotor assembly, characterized in that, The rotor assembly includes a rotor housing fitted outside the stator assembly and a flywheel assembly fixed integrally or separately to the rotor housing. The flywheel assembly is provided with a coupling mechanism for cooperating with the ignition assembly to ignite the ignition assembly.

2. The drive motor according to claim 1, characterized in that, The rotor is fixed to the inner wall of the rotor housing, and the rotor is equipped with magnets.

3. The drive motor according to claim 2, characterized in that, The magnets are evenly spaced on the inner wall of the rotor.

4. The drive motor according to claim 2, characterized in that, The rotor housing is fixedly connected to a rotating shaft that passes through the stator assembly. The stator assembly has a through hole through which the rotating shaft passes, and there is a gap between the inner wall of the through hole and the rotating shaft.

5. The drive motor according to claim 1, characterized in that, The flywheel assembly includes a flywheel that is integral or separate and disposed on the outer wall of the rotor housing.

6. The drive motor according to claim 2, characterized in that, The flywheel is equipped with fan blades.

7. The drive motor according to any one of claims 1 to 6, characterized in that, The rotor assembly has a shaft passing through the stator assembly, and the stator assembly has a through hole for the shaft to pass through, with a gap formed between the inner wall of the through hole and the shaft for accommodating lubricating oil.

8. The drive motor according to claim 7, characterized in that, The stator assembly is provided with an oil seal mechanism on the side opposite to the rotor assembly.

9. The drive motor according to claim 8, characterized in that, The oil seal mechanism includes an oil seal plate sleeved on the rotating shaft, and the oil seal plate and the stator assembly are circumferentially positioned by at least a locating pin.

10. The drive motor according to claim 9, characterized in that, The oil seal plate is provided with screw holes for the positioning pin to pass through, and the inner wall of the through hole of the stator assembly is provided with positioning grooves that cooperate with the positioning pin.

11. A magneto electric starting device, comprising an ignition assembly and a drive motor, characterized in that, The drive motor includes the drive motor as described in any one of claims 1 to 10. The drive motor cooperates with the ignition assembly through a coupling mechanism, and the discharge ignition of the ignition assembly is realized through electromagnetic induction between the coupling mechanism and the ignition assembly.

12. A chainsaw, comprising a chainsaw body, characterized in that, The chainsaw body is equipped with the magneto electric starter as described in claim 11.

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