Electric chain saw

Abstract

The utility model discloses an electric chain saw which comprises a machine shell, a gear box, an oil pump, an oil tank, an oil inlet pipe, a guide plate and an oil outlet pipe. The gear box is installed in the machine shell and comprises a gear box shell, an installation table is arranged on the gear box shell and comprises a planar first installation part, and an included angle is formed between the plane where the first installation part is located and the plane where the top wall of the gear box shell is located; the oil pump is fixedly mounted on the mounting table, penetrates through the first mounting part, is at least partially inserted into the gearbox and is in linkage mounting with the gearbox; the oil tank is installed in the machine shell. The oil inlet pipe communicates with the oil tank; the guide plate is installed on the machine shell. The oil outlet pipe communicates with the oil pump and the guide plate. According to the invention, the probability of oil leakage can be reduced.

Description

Technical Field

[0001] This application belongs to the field of power tool technology, specifically relating to an electric chainsaw. Background Technology

[0002] An electric chainsaw is a chainsaw tool powered by electricity, widely used in wood cutting, garden pruning, and other fields. As an important category of lithium-ion battery garden tools, the oil supply capability of electric chainsaws is a crucial requirement for users. Existing electric chainsaws are prone to oil leakage after the oil pump is inserted into the gearbox.

[0003] Therefore, it is necessary to provide an electric chainsaw to address the aforementioned technical problems.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide an electric chainsaw that can reduce the probability of oil leakage.

[0006] To achieve the above objectives, a specific embodiment of this application provides the following technical solution:

[0007] An electric chainsaw, the electric chainsaw comprising:

[0008] chassis;

[0009] A gearbox is installed in the housing. The gearbox includes a gearbox housing and a mounting platform on the gearbox housing. The mounting platform includes a first mounting portion that is planar. The plane of the first mounting portion forms an angle with the plane of the top wall of the gearbox housing.

[0010] An oil pump is fixedly installed on the mounting platform and passes through the first mounting part. The oil pump is at least partially inserted into the gearbox and is installed in conjunction with the gearbox.

[0011] The fuel tank is installed in the housing;

[0012] An oil inlet pipe connects the oil tank and the oil pump;

[0013] Guide plate, mounted on the housing;

[0014] The oil outlet pipe connects the oil pump and the guide plate.

[0015] In one or more embodiments of this application, the plane containing the first mounting portion is at 90° to the plane containing the top wall of the gearbox housing; and / or,

[0016] The axis of the oil pump is perpendicular to the first mounting portion; and / or,

[0017] On a plane perpendicular to the axis of the gearbox output shaft, the orthographic projection area of ​​the first mounting portion is located within the orthographic projection area of ​​the side wall of the gearbox housing.

[0018] In one or more embodiments of this application, the mounting platform further includes a second mounting portion that is bent and disposed with respect to the first mounting portion. The second mounting portion is connected to the side wall of the gearbox housing, and the bottom of the oil pump is fixedly mounted on the second mounting portion.

[0019] In one or more embodiments of this application, the second mounting portion is disposed perpendicular to the axis direction of the gearbox output shaft; and / or,

[0020] The oil pump is fixedly mounted on the second mounting part by fasteners.

[0021] In one or more embodiments of this application, one of the second mounting part and the oil pump is provided with a limiting groove, and the other is provided with a limiting protrusion that cooperates with the limiting groove, wherein the extending direction of the limiting groove is arranged along the axis of the oil pump.

[0022] In one or more embodiments of this application, the gearbox housing includes an upper cover and a lower cover, one of the upper cover and the lower cover having a mounting groove recessed along the axis of the gearbox output shaft, and the other having a mounting platform partially mounted in the mounting groove.

[0023] In one or more embodiments of this application, the gearbox includes a worm gear disposed in the gearbox housing, and the oil pump is provided with a worm wheel that cooperates with the worm gear.

[0024] In one or more embodiments of this application, the oil pump includes an outer pump body mounted on the mounting platform and an inner pump body rotatably mounted in the outer pump body, the worm gear being disposed on the main shaft of the inner pump body; and / or,

[0025] The axis of the oil pump coincides with or is parallel to the tangent of the worm gear.

[0026] In one or more embodiments of this application, the oil outlet pipe includes a connecting pipe connected to the oil pump, an oil outlet end abutting against the guide plate, and an adapter pipe connecting the connecting pipe and the oil outlet end. The adapter pipe includes a first pipe body connected to the connecting pipe and a second pipe body connected to the oil outlet end, wherein the first pipe body and the second pipe body are bent.

[0027] In one or more embodiments of this application, the angle between the first tube and the second tube is 85° to 95°; and / or,

[0028] The outer shell of the oil tank is provided with an assembly groove, and the oil outlet pipe is installed in the assembly groove.

[0029] Compared with the prior art, the electric chainsaw of this application has the following advantages:

[0030] This application provides an electric chainsaw that reduces the probability of oil leakage by providing a mounting platform with a planar first mounting part on the gearbox housing and passing an oil pump through the first mounting part, thereby enhancing the stability and reliability of the structure. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of an electric chainsaw in one embodiment of this application;

[0033] Figure 2 This is an exploded structural diagram of the electric chainsaw portion of one embodiment of this application;

[0034] Figure 3 This is a cross-sectional view of the electric chainsaw portion of one embodiment of this application;

[0035] Figure 4 This is a three-dimensional structural diagram of the oil outlet pipe in one embodiment of this application.

[0036] Explanation of key figure labels:

[0037] 1-Gearbox; 11-Gearbox housing; 110-Mounting platform; 1101-First mounting part; 1102-Second mounting part; 11021-Limiting groove; 111-Upper cover; 112-Lower cover; 113-Mounting groove; 12-Worm gear;

[0038] 2-Oil pump; 21-Outer pump body; 22-Inner pump body; 23-Worm gear;

[0039] 3-Fuel tank; 31-Assembly slot;

[0040] 4- Oil inlet pipe;

[0041] 5-Oil outlet pipe; 51-Connecting pipe; 52-Oil outlet end; 53-Transfer pipe; 531-First pipe body; 532-Second pipe body;

[0042] 6-Fasteners;

[0043] 7-Casing. Detailed Implementation

[0044] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0047] Because the sidewalls of the gearbox housing in existing electric chainsaws are curved, and the machining precision requirements for curved surfaces are high, poor tolerance control (such as deviation in the radius of curvature) can lead to gaps between the oil pump and the gearbox housing. When the oil pump is inserted into the gearbox housing, the contact surface between the gearbox housing and the oil pump is curved, resulting in poor alignment during installation. The oil pump is prone to tilting during insertion, making it more susceptible to localized gaps. Therefore, oil leakage is likely to occur between the oil pump and the gearbox housing, and there is also the problem of occupying a large amount of space. To solve the above problems, the inventor provides an electric chainsaw.

[0048] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0049] Reference Figures 1-3As shown, the electric chainsaw in this application includes: a housing 7, a gearbox 1, an oil pump 2, an oil tank 3, an oil inlet pipe 4, a guide plate, and an oil outlet pipe 5. The gearbox 1 can be installed in the housing 7. The gearbox 1 may include a gearbox housing 11, and a mounting platform 110 may be provided on the gearbox housing 11. The mounting platform 110 may include a first mounting part 1101 in a planar shape, and the plane of the first mounting part 1101 may form an angle with the plane of the top wall of the gearbox housing 11. The oil pump 2 can be fixedly installed on the mounting platform 110 and penetrate the first mounting part 1101. The oil pump 2 can be at least partially inserted into the gearbox 1 and linked with the gearbox 1. The oil tank 3 can be installed in the housing 7. The oil inlet pipe 4 can connect the oil tank 3 and the oil pump 2. The guide plate can be installed on the housing 7. The oil outlet pipe 5 can connect the oil pump 2 and the guide plate. By providing a mounting platform 110 on the gearbox housing 11, the oil pump 2 can be inserted into the plane. The machining accuracy of the plane is easy to control, and the tolerance requirements are relatively low. The flatness of the contact surface between the mounting platform 110 and the oil pump 2 is easier to ensure, and the two fit tightly together, making it less likely to produce gaps. Alignment is simple during installation, and the oil pump 2 is less likely to tilt after insertion, which can further reduce the probability of gaps. Therefore, the probability of oil leakage can be minimized. At the same time, the oil pump 2 passes through the planar first mounting part 1101, which is easy to align during installation. The force between the two is uniform, and the structure is more stable and reliable.

[0050] For ease of machining gearbox 1, refer to... Figure 2 , Figure 3 As shown, in this embodiment, the plane containing the first mounting portion 1101 can be at a 90° angle to the plane containing the top wall of the gearbox housing 11. In mechanical design, acute angles easily lead to stress concentration because materials are more prone to cracking at sharp angles. Obtuse angles may reduce stress concentration but increase material usage. Compared to designs where the angle between the first mounting portion 1101 and the top wall of the gearbox 1 is acute or obtuse, when the angle between the first mounting portion 1101 and the top wall of the gearbox 1 is a right angle, the right-angle connection can distribute the load more evenly, reducing local stress concentration. This allows the final gearbox housing 11 to have sufficient strength without wasting material. Meanwhile, when the angle between the first mounting part 1101 and the top wall of the gearbox 1 is a right angle, the cutting steps are simple, the accuracy is easy to control, and it can be directly machined using standard milling cutters, turning tools, etc., without the need for custom tools. However, when the angle between the first mounting part 1101 and the top wall of the gearbox 1 is an acute or obtuse angle, special tools or multiple tool changes are required, and complex angles require multiple calibrations, which can easily introduce errors and increase processing time and cost. In addition, the right angle design is easy to align and fix, reducing assembly errors; non-right angles may require repeated angle adjustments, increasing complexity.

[0051] Since the first mounting part 1101 in this application is planar, refer to Figure 3As shown, in this embodiment, the axial direction of the oil pump 2 can be perpendicular to the first mounting portion 1101. When the oil pump 2 penetrates the first mounting portion 1101 perpendicularly, the axis of the oil pump 2 is perpendicular to the first mounting portion 1101, and the load (such as axial force and torque) is directly transmitted along the axis of the oil pump 2, reducing the occurrence of bending moment or lateral force due to tilting, and reducing deformation and fatigue damage of the oil pump 2. At the same time, when the oil pump 2 penetrates the first mounting portion 1101 perpendicularly, the through hole opened on the first mounting portion 1101 can be directly processed by standard drill bits, reamers, etc., without the need for complex angle adjustments, reducing processing costs and precision requirements, and the efficiency is much higher than processing inclined holes. In addition, the oil pump 2 penetrating the first mounting portion 1101 perpendicularly can make full use of the internal space of the housing 7, reducing the occurrence of tilted penetration occupying additional space, which is suitable for miniaturized equipment design.

[0052] In existing electric chainsaws, the oil pump 2 is directly inserted into the barrel-shaped gearbox housing 11, thus occupying a large space. Therefore, to solve the above problem, referring to... Figure 2 , Figure 3 As shown, on a plane perpendicular to the output shaft axis of gearbox 1, the orthographic projection area of ​​the first mounting portion 1101 in this embodiment can be located within the orthographic projection area of ​​the side wall of gearbox housing 11. Based on this design, the oil pump 2 can utilize part of the space in the gearbox 1 of a conventional electric chainsaw. The oil pump 2 shares internal space with the gearbox 1, thereby reducing the space occupied by the oil pump 2, improving its space utilization rate, and making the overall equipment more compact.

[0053] To facilitate the fixing of oil pump 2 and increase the reliability of the connection between oil pump 2 and gearbox 1, refer to Figure 2 , Figure 3 As shown, the mounting platform 110 in this embodiment may also include a second mounting part 1102 that is bent and disposed with the first mounting part 1101. The second mounting part 1102 is connected to the side wall of the gearbox housing 11, and the bottom of the oil pump 2 is fixedly mounted on the second mounting part 1102.

[0054] Optionally, refer to Figure 2 , Figure 3 As shown, in this embodiment, the second mounting portion 1102 can be arranged perpendicular to the axis of the output shaft of the gearbox 1. The oil pump 2 can be mounted more stably and reliably on the second mounting portion 1102. Compared with an inclined plane, the force is more evenly distributed, which can reduce the risk of sliding caused by the component of gravity and reduce local stress concentration. At the same time, a flat surface is easier to standardize than an inclined plane, making processing more convenient and less costly.

[0055] Reference Figure 2 , Figure 3As shown, in this embodiment, the oil pump 2 can be fixedly mounted on the second mounting portion 1102 by fasteners 6. Specifically, the outer pump body 21 of the oil pump 2 (described below) has at least one pair of mounting holes on opposite sides. The plane of this pair of mounting holes is approximately parallel to the second mounting portion 1102. The second mounting portion 1102 has another pair of mounting holes aligned with this pair of mounting holes. When the fasteners 6 penetrate the mounting holes on the oil pump 2 and the mounting holes on the second mounting portion 1102, the oil pump 2 can be fixedly mounted on the second mounting portion 1102 of the outlet box housing. Of course, this application is not limited to this. In other embodiments, the outer pump body 21 of the oil pump 2 has three, four, or five mounting holes, etc., and the second mounting portion 1102 also has corresponding mounting holes. As long as the plane of the mounting holes on the outer pump body 21 is approximately parallel to the second mounting portion 1102, this application does not limit the number of mounting holes. The fasteners 6 can be screws, bolts, studs, etc.

[0056] To restrict the installation direction of oil pump 2, refer to Figure 2 , Figure 3 As shown, in this application, one of the second mounting portion 1102 and the oil pump 2 may be provided with a limiting groove 11021, and the other may be provided with a limiting protrusion that cooperates with the limiting groove 11021. The extending direction of the limiting groove 11021 is set along the axial direction of the oil pump 2. For example, in this embodiment, the second mounting portion 1102 may be provided with a limiting groove 11021, and the oil pump 2 may be provided with a limiting protrusion. In other embodiments, the second mounting portion 1102 may be provided with a limiting protrusion, and the oil pump 2 may be provided with a limiting groove 11021. According to this design, when the limiting protrusion of the oil pump 2 is placed in the limiting groove 11021 of the second mounting portion 1102, the direction in which the oil pump 2 penetrates the first mounting portion 1101 is the extending direction of the limiting groove 11021. According to this design, the probability of the oil pump 2 shifting position during installation can be reduced.

[0057] Reference Figure 2 , Figure 3 As shown, the gearbox housing 11 in this embodiment may include an upper cover 111 and a lower cover 112. One of the upper cover 111 and the lower cover 112 may have a mounting groove 113 recessed along the gearbox output shaft axis, and the other may have a mounting platform 110 partially mounted in the mounting groove 113. For example, in this embodiment, the upper cover 111 may have a mounting platform 110, and the lower cover 112 may have a mounting groove 113. Of course, this application is not limited to this; in other embodiments, the upper cover 111 may have a mounting groove 113, and the lower cover 112 may have a mounting platform 110. According to this design, when the upper cover 111 and the lower cover 112 are installed together, the relative rotation between the upper cover 111 and the lower cover 112 can be reduced.

[0058] To ensure that gearbox 1 and oil pump 2 are installed in a coordinated manner, refer to... Figure 2 , Figure 3 As shown, the gearbox 1 in this embodiment may include a worm gear 12 disposed in the gearbox housing 11, and the oil pump 2 may be provided with a worm wheel 23 that meshes with the worm gear 12. When the worm gear 12 (driving element) in the gearbox 1 rotates, it transmits power through meshing with the worm wheel 23 (driven element) on the oil pump 2. Since the helical teeth of the worm gear 12 mesh with the helical teeth of the worm wheel 23, the worm wheel 23 only rotates a small number of teeth (or one tooth) for every revolution of the worm gear 12, forming a high reduction ratio, thereby reducing the speed of the oil pump 2, but increasing the output torque. The meshing of the worm gear 12 and the worm wheel 23 has a self-locking characteristic, that is, the worm gear 12 can drive the worm wheel 23, but the worm wheel 23 cannot drive the worm gear 12 in the reverse direction. This characteristic ensures that the oil pump 2 can only be actively driven by the worm gear 12 of the gearbox 1, reducing the probability of system runaway due to reverse drive by external load. The oil pump 2 in this application may be a gear pump or an internal meshing rotor pump.

[0059] For example, refer to Figure 3 As shown, the oil pump 2 in this embodiment is an internal meshing rotor pump. Specifically, the oil pump 2 in this embodiment may include an outer pump body 21 mounted on the mounting platform 110 and an inner pump body 22 rotatably mounted in the outer pump body 21. The worm gear 23 may be disposed on the main shaft of the inner pump body 22. When the worm gear 23 is driven to rotate by the worm 12, the inner pump body 22 inside the outer pump body 21 rotates accordingly, forming a closed pump chamber. As the inner pump body 22 rotates, the volume of the pump chamber changes periodically. When the oil pump 2 is in the oil suction stage, the volume of the pump chamber increases, forming a negative pressure, and oil is drawn from the oil tank 3; when the oil pump 2 is in the oil discharge stage, the volume of the pump chamber decreases, the oil is compressed, and it is transported to the guide plate through the oil outlet pipe 5.

[0060] Optional, refer to Figure 2 , Figure 3 As shown, in this embodiment, the axis of the oil pump 2 can coincide with or be parallel to the tangent of the worm 12. When the axis of the oil pump 2 is closer to the tangent of the worm 12, the center distance between the axes of the worm 12 and the worm wheel 23 is smaller, resulting in a more compact arrangement and greater space utilization. Simultaneously, the smaller the center distance between the axes of the worm 12 and the worm wheel 23, the less bending deformation occurs in the worm 12 and the worm wheel 23, thus enhancing their resistance to vibration and impact.

[0061] In existing technologies, the tail of the oil outlet pipe 5 is often designed as a straight line. When the oil outlet pipe 5 is fixedly installed, it requires a large-angle bend, which significantly increases the compression of the oil outlet pipe 5 and affects the oil delivery efficiency. Therefore, in order to solve the above problems, referring to... Figure 2 , Figure 4As shown, the oil outlet pipe 5 in this embodiment may include a connecting pipe 51 connected to the oil pump 2, an oil outlet end 52 abutting against the guide plate, and an adapter pipe 53 that can connect the connecting pipe 51 and the oil outlet end 52. The adapter pipe 53 may include a first pipe body 531 connected to the connecting pipe 51 and a second pipe body 532 connected to the oil outlet end 52, with the first pipe body 531 and the second pipe body 532 bent. According to this design, the bending angle of the oil outlet pipe 5 when fixed can be reduced, the degree of compression of the oil outlet pipe 5 after installation can be reduced, the smoothness of the internal channel of the oil outlet pipe 5 and the oil outlet efficiency can be improved, and the service life of the oil outlet pipe 5 can be increased.

[0062] In this application, the angle between the first tube 531 and the second tube 532 can be 85° to 95°. For example, in this embodiment, the angle between the first tube 531 and the second tube 532 can be 90°, or 85°, or 86°, or 87°, or 88°, or 89°, or 91°, or 92°, or 93°, or 94°, or 95°, or any value other than those mentioned above, which is located in (85°, 95°).

[0063] For ease of installation of oil outlet pipe 5, refer to... Figure 2 , Figure 4 As shown, in this embodiment, the outer shell of the oil tank 3 may be provided with an assembly groove 31, and the oil outlet pipe 5 may be installed in the assembly groove 31.

[0064] In the description of the embodiments of this application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly placed when the product of this application is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or component 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.

[0065] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0066] In the description of the embodiments of this application, it should also be noted that the terms "first", "second", etc. used herein do not specifically refer to any order or sequence, nor are they intended to limit this application; they are merely used to distinguish components or operations described using the same technical terms.

[0067] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0068] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric chainsaw, characterized in that, The electric chainsaw includes: Casing (7); A gearbox (1) is installed in the housing (7). The gearbox (1) includes a gearbox housing (11). The gearbox housing (11) is provided with a mounting platform (110). The mounting platform (110) includes a first mounting part (1101) in the shape of a plane. The plane of the first mounting part (1101) forms an angle with the plane of the top wall of the gearbox housing (11). An oil pump (2) is fixedly installed on the mounting platform (110) and passes through the first mounting part (1101). The oil pump (2) is at least partially inserted into the gearbox (1) and is linked to the gearbox (1). The fuel tank (3) is installed in the housing (7); Oil inlet pipe (4) connects the oil tank (3) and the oil pump (2); A guide plate is installed on the housing (7); The oil outlet pipe (5) connects the oil pump (2) and the guide plate.

2. The electric chainsaw according to claim 1, characterized in that, The angle between the plane of the first mounting part (1101) and the plane of the top wall of the gearbox housing (11) is 90°; and / or, The axial direction of the oil pump (2) is perpendicular to the first mounting part (1101); and / or, On a plane perpendicular to the axis of the output shaft of the gearbox (1), the orthographic projection area of ​​the first mounting part (1101) is located within the orthographic projection area of ​​the side wall of the gearbox housing (11).

3. The electric chainsaw according to claim 1, characterized in that, The mounting platform (110) also includes a second mounting part (1102) that is bent and disposed with the first mounting part (1101). The second mounting part (1102) is connected to the side wall of the gearbox housing (11), and the bottom of the oil pump (2) is fixedly mounted on the second mounting part (1102).

4. The electric chainsaw according to claim 3, characterized in that, The second mounting part (1102) is arranged perpendicular to the axis of the output shaft of the gearbox (1); and / or, The oil pump (2) is fixedly mounted on the second mounting part (1102) by fasteners (6).

5. The electric chainsaw according to claim 3, characterized in that, The second mounting part (1102) and the oil pump (2) are provided with a limiting groove (11021) on one of them, and a limiting protrusion that cooperates with the limiting groove (11021) on the other. The extending direction of the limiting groove (11021) is set along the axis of the oil pump (2).

6. The electric chainsaw according to claim 1, characterized in that, The gearbox housing (11) includes an upper cover (111) and a lower cover (112). One of the upper cover (111) and the lower cover (112) is recessed along the axis of the gearbox output shaft, and the other is provided with a mounting platform (110) partially installed in the mounting groove (113).

7. The electric chainsaw according to claim 1, characterized in that, The gearbox (1) includes a worm (12) disposed in the gearbox housing (11), and the oil pump (2) is provided with a worm wheel (23) that cooperates with the worm (12).

8. The electric chainsaw according to claim 7, characterized in that, The oil pump (2) includes an outer pump body (21) mounted on the mounting platform (110) and an inner pump body (22) rotatably mounted in the outer pump body (21), wherein the worm gear (23) is disposed on the main shaft of the inner pump body (22); and / or, The axis of the oil pump (2) coincides with or is parallel to the tangent of the worm (12).

9. The electric chainsaw according to claim 1, characterized in that, The oil outlet pipe (5) includes a connecting pipe (51) connected to the oil pump (2), an oil outlet end (52) abutting against the guide plate, and a connecting pipe (53) connecting the connecting pipe (51) and the oil outlet end (52). The connecting pipe (53) includes a first pipe body (531) connected to the connecting pipe (51) and a second pipe body (532) connected to the oil outlet end (52). The first pipe body (531) and the second pipe body (532) are bent.

10. The electric chainsaw according to claim 9, characterized in that, The angle between the first tube (531) and the second tube (532) is 85° to 95°; and / or, The oil tank (3) has an assembly groove (31) on its outer shell, and the oil outlet pipe (5) is installed in the assembly groove (31).

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