Electric starting chain saw

Abstract

The invention relates to an electric starting chain saw, which at least solves the problem that the electric starting mechanism of the existing chain saw on the market is not easy to use, and comprises a chain saw main body, the chain saw main body is provided with a chain saw mechanism and an engine unit for providing power for the chain saw mechanism, and the power output end of the engine unit is in transmission connection with the chain saw mechanism. A magneto-electric starting mechanism is arranged on the chain saw body and comprises an ignition assembly used for igniting the engine unit and a driving motor matched with the ignition assembly.

Description

Technical Field

[0001] The present application relates to an electric start chain saw. Background Art

[0002] The magneto mechanism used for engine ignition on the existing chain saw is generally an outer rotor magneto, such as the magneto mechanism disclosed in the Chinese utility model patent with authorization announcement number CN201766477U, which consists of a rotor assembly and a stator assembly, wherein the stator assembly includes a fixed base plate, a power coil, an ignition coil, and an igniter. The power coil and the ignition coil are assembled on the fixed base plate, and then fixedly mounted on the engine housing. The rotor assembly is mounted on the crankshaft of the engine and rotates with the crankshaft. The rotor assembly includes a rotor, a magnetic pole core and a magnet. 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, and induces current on the power coil, so that the secondary induction of the ignition coil generates a high voltage output greater than 20KV to ignite the engine.

[0003] In the above structure, the rotor assembly is generally driven to rotate by pulling a rope manually, that is, a rope is wound around the rotor assembly, and the rope is pulled by a hand to drive the rotor assembly to rotate, and ignition is relatively laborious.

[0004] A Chinese utility model patent with authorization announcement number CN220151463U discloses an electric start chain saw, in which an engine and a flywheel rotating synchronously with the engine are arranged in the chain saw body, a rope pulley is arranged on the outer side of the flywheel, and a starting disk is arranged on the flywheel. When the rope pulley rotates, the starting disk is driven to rotate in one direction. The chain saw body is provided with a starting motor that drives the starting disk and a reset flameout switch that controls the start of the starting motor. When the starting motor is turned on, the starting disk is driven to rotate, and the flywheel connected to the starting disk also rotates synchronously. When the speed exceeds the minimum ignition speed of the flywheel, the engine can ignite normally and start quickly. At the same time, a hand pull rope can be used to start the engine, so that the user can flexibly choose between the two starting methods of motor and hand pull according to actual conditions.

[0005] The problem with the above structure is that it is complex and has many parts, which results in a relatively large volume of the chain saw. Summary of the invention

[0006] The purpose of the present application is to provide an electric start chain saw, so as to at least solve the problem that the electric start mechanism of the chain saws currently on the market is not easy to use.

[0007] In order to achieve the above-mentioned purpose, the present application provides an electric-starting oil saw, comprising an oil saw body, the oil saw body being provided with a chain saw mechanism and an engine group for providing power to the chain saw mechanism, the power output end of the engine group being transmission-connected to the chain saw mechanism, the oil saw body being provided with a magneto electric starting mechanism, the magneto electric starting device comprising an ignition assembly for igniting the engine group and a drive motor cooperating with the ignition assembly, when the drive motor is working, electromagnetic induction is generated between the drive motor and the ignition assembly, thereby realizing discharge ignition of the ignition assembly.

[0008] Preferably, the magneto electric starting device includes an ignition assembly for igniting the engine unit and a drive motor that cooperates with the ignition assembly through a coupling mechanism. When the drive motor is working, electromagnetic induction is generated between the coupling mechanism and the ignition assembly to achieve discharge ignition of the ignition assembly.

[0009] Preferably, the engine unit is provided with an initial power input shaft, the drive motor comprises a stator assembly installed in the chainsaw body and a rotor assembly fixedly connected to the initial power input shaft and rotatable relative to the stator assembly, the rotation of the rotor assembly is achieved through electromagnetic induction cooperation between the stator assembly and the rotor assembly, and the coupling mechanism is arranged between the rotor assembly and the ignition assembly.

[0010] Preferably, the rotor assembly comprises a rotor housing sleeved outside the stator assembly and a flywheel assembly fixed to the rotor housing in an integral or split manner, and the coupling mechanism is arranged between the flywheel assembly and the ignition assembly.

[0011] Preferably, the initial power input shaft passes through the stator assembly, and the stator assembly is provided with a through hole for the initial power input shaft to pass through, and there is a gap between the inner wall of the through hole and the initial power input shaft.

[0012] Preferably, the flywheel assembly comprises an integral or split flywheel arranged on the outer wall of the rotor housing.

[0013] Preferably, the flywheel is provided with fan blades.

[0014] Preferably, a deflector is provided on the outer side of the flywheel assembly.

[0015] Preferably, the chain saw body is provided with a hand-start assembly, and the hand-start assembly and the drive motor are connected via a one-way transmission mechanism.

[0016] Preferably, a rope wheel is provided on the chain saw body, a rope pulley assembly is provided on the rope wheel, and the rope wheel and the rotor assembly of the driving motor are connected via a one-way transmission mechanism.

[0017] Preferably, the chain saw body is provided with a reset disk for automatically resetting the rope wheel.

[0018] Preferably, a detachable battery pack is provided at the rear end of the handle of the chainsaw body.

[0019] Preferably, a slot with an upwardly facing insertion opening is provided on the rear end surface of the handle, and the battery pack is inserted into the slot and snapped into the slot.

[0020] According to the above content, the beneficial effects of this application are:

[0021] The present application arranges a driving motor on the main body of the chainsaw, and cooperates with the driving motor and the ignition device. When the driving motor is working, on the one hand, it provides an initial power source for the engine group in the starting process, and on the other hand, the ignition component is ignited through the electromagnetic induction cooperation of the coupling mechanism and the ignition component, so that the chainsaw has the advantages of compact structure, simple structure, small size and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a partial structural diagram of this application. Figure 1 ;

[0025] Figure 3 This is a partial structural diagram of this application. Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the structure of the drive motor of this application Figure 1 ;

[0027] Figure 5 This is a schematic diagram of the structure of the drive motor of this application Figure 2 ;

[0028] Figure 6 is an exploded view of the drive motor of the present application;

[0029] Figure 7 This is a partial illustration of this application Figure 3 . DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0031] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for ordinary technicians in the field related to the contents disclosed in the present application, some changes such as design, manufacturing or production based on the technical contents disclosed in the present application are only conventional technical means, and should not be understood as the contents disclosed in the present application are insufficient.

[0032] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0033] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the common meanings understood by persons with ordinary skills in the technical field to which this application belongs. The words "a", "an", "a", "the" and the like used in this application do not indicate quantity restrictions and may indicate the singular or plural. The terms "include", "comprising", "having" and any variations thereof involved in the present application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device including a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connected", "connected", "coupled" and the like involved in the present application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plurality" involved in the present application refers to greater than or equal to two. " / " and "and / or" describe the association relationship of associated objects. " / " means "or", for example, "A / B" can mean: A exists alone or B exists alone; "and / or" means that there can be three relationships, for example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. The terms "first", "second", "third" and the like involved in the present application are only used to distinguish similar objects and do not represent a specific ordering of objects.

[0034] See also Figures 1 to 7The electric starter oil saw of this embodiment mainly comprises an oil saw body 5, wherein the oil saw body is provided with a chain saw mechanism 51 and an engine group 52 for providing power to the chain saw mechanism, wherein the power output end of the engine group and the chain saw mechanism are connected by a transmission mechanism, and a magneto electric starting mechanism is provided on the oil saw body, wherein the magneto electric starting device comprises an ignition assembly 6 for igniting the engine group and a driving motor matched with the ignition assembly, wherein when the driving motor is working, electromagnetic induction is generated between the driving motor and the ignition assembly, thereby realizing discharge ignition of the ignition assembly.

[0035] A detachable battery pack 7 is provided at the rear end of the handle 53 of the chain saw body. Specifically, a slot with an upwardly facing socket is provided at the rear end of the handle. The battery pack is inserted into the slot and snapped into the slot. The battery pack can use common rechargeable batteries. After removal, it is convenient to replace or charge the battery pack. In addition, due to the detachable connection, the battery pack can be configured to be compatible with other models of power tools. Users can install battery packs on other power tools on the chain saw for use. The battery pack 7 provides power to the drive motor, and a channel is provided in the handle for the wires connected to the battery pack to pass through.

[0036] The magneto electric starting device includes an ignition component for igniting the engine group and a drive motor that cooperates with the ignition component through a coupling mechanism. When the drive motor is working, electromagnetic induction is generated between the coupling mechanism and the ignition component to achieve discharge ignition of the ignition component.

[0037] The drive motor mainly includes a stator assembly and a rotor assembly which 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 a coil winding (not shown in the figure) is arranged in the stator slot 11 of the stator core. The rotor assembly includes a rotor housing 2, and a rotor 21 is embedded in the inner wall of the rotor housing. The rotor is provided with magnetic steel 22, and the magnetic steel is evenly embedded in the inner wall of the rotor. After the coil winding is energized, the rotation of the rotor assembly is realized through electromagnetic induction between the stator assembly and the rotor assembly. It is also possible to arrange magnetic steel on the stator assembly and arrange coil winding on the rotor assembly to realize the relative rotation between the stator assembly and the rotor assembly, which are all existing technologies.

[0038] The engine unit is provided with an initial power input shaft 23 passing through the stator core of the stator assembly, the rotor housing is circumferentially fixedly connected to the initial power input shaft, the rotor housing and one end of the initial power input shaft are keyed to achieve circumferential relative positioning and axial prevention of separation from the end of the initial power input shaft, the stator core of the stator assembly is provided with a through hole 12 for the initial power input shaft to pass through, a gap for accommodating lubricating oil (butter, engine oil, etc.) is formed between the inner wall of the through hole and the initial power input shaft, and an oil seal mechanism is provided on the side of the stator assembly away from the rotor assembly.

[0039] Specifically, the oil seal mechanism includes an oil seal plate 3 sleeved on the initial power input shaft, and the oil seal plate and the stator assembly are circumferentially positioned at least by a positioning pin (not shown in the figure). Preferably, in this embodiment, the oil seal plate is provided with a screw hole 31 for the positioning pin to pass through, and the inner wall of the through hole of the stator core of the stator assembly is provided with a positioning groove 13 that cooperates with the positioning pin.

[0040] A flywheel assembly is fixed to the rotor housing in an integral or split manner. The flywheel assembly includes a flywheel 4 which is integral or split and is arranged 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 an ignition assembly to ignite the ignition assembly.

[0041] Among them, the coupling mechanism is a magnetic coupling mechanism arranged between the rotor assembly and the ignition assembly. Specifically, the ignition assembly includes an ignition coil and an igniter. The coupling mechanism includes a power supply coil arranged on the ignition assembly and a magnetic pole core and a magnet arranged on the rotor assembly. Through the rotation of the rotor assembly, the ignition assembly cuts the magnetic lines of force of the rotating magnetic poles of the magnetic coupling mechanism, and induces current on the power supply coil, thereby causing the ignition coil to discharge and ignite.

[0042] A deflector 54 is provided on the outer side of the flywheel assembly to facilitate the discharge of debris and impurities to the outside when the rotor assembly rotates.

[0043] The chain saw body is provided with a hand-start assembly, and the hand-start assembly and the drive motor are connected by a one-way transmission mechanism. Specifically, the chain saw body is provided with a rope pulley 55 and a reset disk 56 with a coil spring inside for resetting the rope pulley. The rope pulley is provided with a rope pull assembly, and only the rope pull handle 57 is shown in the figure. The rope pulley and the rotor assembly of the drive motor are connected by a one-way transmission mechanism. In this embodiment, the one-way transmission mechanism includes a pawl 58 arranged on the side of the rope pulley and the rotor housing of the drive motor facing the rope pulley, and a ratchet disk 59 arranged on the side of the rope pulley facing the rotor housing. When the rope pulley or the rotor assembly rotates in one direction, the ratchet teeth on the pawl and the ratchet disk cooperate to link the rotor assembly to rotate and drive the initial power input shaft to work. When the rope pulley or the rotor assembly rotates in the opposite direction, the ratchet teeth on the pawl and the ratchet disk disengage from cooperation to form idling.

[0044] In this embodiment, the initial power input shaft may be the left crank of the engine group, and the power output end of the engine group may be the right crank of the engine group.

[0045] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An electric-start chain saw, comprising a chain saw body, wherein the chain saw body is provided with a chain saw mechanism and an engine group for providing power to the chain saw mechanism, wherein a power output end of the engine group is in transmission connection with the chain saw mechanism, and wherein: The chainsaw body is provided with a magneto electric starting mechanism, which includes an ignition assembly for igniting the engine unit and a drive motor cooperating with the ignition assembly. When the drive motor is working, electromagnetic induction is generated between the drive motor and the ignition assembly to achieve discharge ignition of the ignition assembly.

2. The electric start chain saw according to claim 1, characterized in that: The engine unit is provided with an initial power input shaft, and the drive motor comprises a stator assembly installed in the chain saw body and a rotor assembly fixedly connected to the initial power input shaft and rotatable relative to the stator assembly, and the rotation of the rotor assembly is achieved through electromagnetic induction cooperation between the stator assembly and the rotor assembly, and a coupling mechanism for generating electromagnetic induction between the drive motor and the ignition assembly is provided between the rotor assembly and the ignition assembly.

3. The electric start chain saw according to claim 2, characterized in that: The rotor assembly comprises a rotor housing sleeved outside the stator assembly and a flywheel assembly fixed to the rotor housing in an integral or split manner. The coupling mechanism is arranged between the flywheel assembly and the ignition assembly.

4. The electric start chain saw according to claim 2, characterized in that: The initial power input shaft passes through the stator assembly, and the stator assembly is provided with a through hole for the initial power input shaft to pass through, and there is a gap between the inner wall of the through hole and the initial power input shaft.

5. The electric start chain saw according to claim 3, characterized in that: The flywheel assembly comprises an integrated or split flywheel arranged on the outer wall of the rotor housing.

6. The electric-start chain saw according to claim 5, characterized in that: The flywheel is provided with fan blades.

7. The electric-start chain saw according to any one of claims 3 to 6, characterized in that: A deflector is arranged on the outer side of the flywheel assembly.

8. The electric-start chain saw according to any one of claims 1 to 6, characterized in that: The chain saw body is provided with a hand-start component, and the hand-start component and the drive motor are connected via a one-way transmission mechanism.

9. The electric-start chain saw according to any one of claims 1 to 6, characterized in that: A rope wheel is arranged on the main body of the chain saw, a rope pulley assembly is arranged on the rope wheel, and the rope wheel and the rotor assembly of the driving motor are connected through a one-way transmission mechanism.

10. The electric-start chain saw according to any one of claims 1 to 6, characterized in that: A detachable battery pack is provided at the rear end of the handle of the chainsaw body; and / or a slot with an upwardly facing insertion opening is provided at the rear end of the handle of the chainsaw body, and the battery pack is inserted into the slot and snapped into the slot.

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