Chain saw

Abstract

The utility model discloses a chain saw. The chain saw comprises a motor; a housing; the output assembly is used for outputting work, and the output assembly extends in the first linear direction; the transmission assembly is connected with the motor; the holding part is used for being held by a user; a first plane penetrating through the first straight line is defined, the first plane basically divides the output assembly left and right, the motor shaft is basically perpendicular to the first plane, and the motor shaft is located above the first straight line. A second plane penetrating through the holding part is defined, the second plane and the first plane are basically parallel or coincide, and the holding part is bisected by the second plane in the left-right direction; the distance between the first plane and the second plane is smaller than or equal to 12 mm. According to the technical scheme, the gravity center of the whole machine is close to the human hand, the operation fatigue feeling is reduced, the output assembly is easier to align, and accurate operation is facilitated.

Description

Technical Field

[0001] The present application relates to an electric tool, in particular to a chain saw. Background Art

[0002] A power tool in related technology.

[0003] Power tools and handheld power tools can be various types of tools, such as cutting tools, grinding tools, or pruning tools. They can be powered by either alternating current (AC) or direct current (DC). Power tools include an output assembly, a transmission assembly, a motor, and a grip. The output assembly can be used to perform various tasks. For example, chainsaws and reciprocating saws can be used for cutting, while band saws can be used for grinding.

[0004] When a user's hand grips a power tool, the position of the power tool's center of gravity significantly impacts the user's fatigue. If the center of gravity is located too far in front of the hand or too close to the hand, the user can easily experience fatigue while using the power tool.

[0005] When the user is performing a cutting operation, if the center plane of the output component of the power tool is spaced a certain distance from the center plane of the grip portion, the user may be unable to align the tool during the operation, affecting the operation accuracy and user experience.

[0006] Chainsaws, as power tools, specifically handheld power tools, are widely used in homes and gardens. They use a chain mounted on a guide bar to trim trees and branches. Also known as pruning machines, chainsaws are typically driven by a motor. A transmission assembly reduces speed, driving a sprocket that then moves the chain along the guide bar to perform the cutting operation.

[0007] This section provides background information related to the present application which is not necessarily prior art. Utility Model Content

[0008] One object of the present application is to solve or at least alleviate a part or all of the above problems. To this end, one object of the present application is to provide an electric tool.

[0009] In order to achieve the above objectives, this application adopts the following technical solutions:

[0010] An electric tool comprises: a motor including a motor shaft; a housing; an output assembly for outputting work, the output assembly extending along a first straight line; a transmission assembly connected to the motor; a grip portion for a user to grip; a first plane passing through the first straight line is defined, the first plane substantially bisects the output assembly left and right, the motor shaft is substantially perpendicular to the first plane, and the motor shaft is located above the first straight line.

[0011] In one embodiment, the output assembly includes a chain and a guide plate, the guide plate supports the chain, and the transmission assembly drives the chain to move on the guide plate.

[0012] In one embodiment, the transmission assembly includes a first drive wheel and a second drive wheel. The first drive wheel is driven by a motor shaft to rotate around a first axis, and the first axis is coaxial with the motor shaft; the second drive wheel rotates around a second axis and drives the output assembly to move.

[0013] In one embodiment, the transmission assembly further includes a belt, and the belt transmission connects the first drive wheel and the second drive wheel, wherein the first drive wheel is a driving pulley and the second drive wheel is a driven pulley.

[0014] In one embodiment, the transmission assembly further includes a transmission gear, which connects the first drive wheel and the second drive wheel, wherein the first drive wheel is a driving gear and the second drive wheel is a driven gear.

[0015] In one embodiment, a plane rectangular coordinate system is established with the center point of the second drive wheel as the origin, the plane rectangular coordinate system includes an x-axis and a y-axis that are perpendicular to each other, the x-axis is parallel to the first straight line, the x-axis has a positive direction in front of the output component, and the y-axis has an upward positive direction; the second axis passes through the origin.

[0016] In one embodiment, the motor is at least partially located in the second quadrant of the rectangular coordinate system.

[0017] In one embodiment, the electric tool further includes a control board electrically connected to the motor, and the control board is at least partially located in the third quadrant of the plane rectangular coordinate system.

[0018] In one embodiment, the electric tool further includes a control board, which is electrically connected to the motor, and the motor shaft is located above the control board.

[0019] In one embodiment, the first driving wheel is driven by a motor shaft to rotate around a first axis; in a plane rectangular coordinate system, a line connecting the first axis and the origin forms an axis line, and an angle between the axis line and the positive direction of the y-axis is a first angle α, and the first angle α is greater than or equal to 20 degrees and less than or equal to 80 degrees.

[0020] The present application also provides an electric tool, including: a shell; an output component for outputting work, the output component extending along a first straight line direction; a transmission component connected to a motor; a motor driving the transmission component to move, the motor including a motor shaft; a grip for a user to hold; defining a first plane passing through the first straight line, the first plane basically bisects the output component left and right; defining a second plane passing through the grip, the second plane is basically parallel to or coincides with the first plane, and the second plane bisects the grip; the distance between the first plane and the second plane is less than or equal to 12 mm.

[0021] In one embodiment, the distance between the first plane and the second plane is less than or equal to 8 mm.

[0022] In one embodiment, the distance between the first plane and the second plane is less than or equal to 5 mm.

[0023] In one embodiment, the first plane and the second plane are substantially coincident.

[0024] In one embodiment, the motor shaft is substantially perpendicular to the first line.

[0025] In one embodiment, the motor shaft is located above the first straight line.

[0026] In one embodiment, the motor shaft is substantially perpendicular to the first straight line, and the motor shaft is located above the first straight line.

[0027] In one embodiment, the center of gravity of the power tool when the battery pack is installed is defined as the center of gravity of the entire machine, and the distance between the center of gravity of the entire machine and the first plane is less than or equal to 10 mm.

[0028] In one embodiment, the distance between the center of gravity of the entire machine and the first plane is less than or equal to 8 mm.

[0029] In one embodiment, the distance between the center of gravity of the entire machine and the first plane is less than or equal to 5 mm.

[0030] In one embodiment, the center of gravity of the entire machine substantially coincides with the first plane.

[0031] In one embodiment, the maximum distance formed by any two of the first plane, the second plane and the center of gravity of the entire machine does not exceed 8 mm.

[0032] In one embodiment, the maximum distance between any two of the first plane, the second plane, and the center of gravity of the entire machine does not exceed 5 mm.

[0033] In one embodiment, the first plane, the second plane and the center of gravity of the entire machine substantially coincide with each other.

[0034] In one embodiment, the motor is an electric motor, and the maximum outer diameter D of the motor is less than or equal to 60 mm.

[0035] In one embodiment, the motor is an electric motor, and a stack length H of the motor is less than or equal to 20 mm.

[0036] The present application also provides an electric tool, comprising: a housing, forming a accommodating space; a chain; a guide plate, used to support the chain; a transmission assembly, driving the chain to move on the guide plate; a motor, driving the transmission assembly to move, the motor including a motor shaft; a grip portion, for a user to grip; defining a first plane (302) passing through the guide plate, the first plane basically dividing the guide plate into left and right halves; defining a second plane (502) passing through the grip portion, the second plane being basically parallel to or overlapping with the first plane, and the second plane dividing the grip portion into left and right halves; the distance between the first plane and the second plane is less than or equal to 12 mm.

[0037] The benefits of this application lie in the following: Firstly, by arranging the motor shaft perpendicular to the guide plate and positioning the motor above the first straight line extending from the guide plate, and by lengthening the center-to-center distance of the transmission assembly, the motor is positioned above and behind the handle, bringing the center of gravity of the entire machine closer to the hand, thereby reducing user fatigue. Secondly, the technical solution of this application minimizes the distance between the center plane of the guide plate, the center of gravity of the entire machine, and the center plane of the grip, making it easier for the user to operate with greater precision and less prone to skewed or uneven cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a stereogram of a power tool;

[0039] Figure 2 yes Figure 1 An exploded schematic diagram of the power tool shown;

[0040] Figure 3 is a schematic diagram of the transmission assembly, guide bar and control panel of a chain saw;

[0041] Figure 4 yes Figure 3 A schematic diagram of the transmission assembly and guide plate shown in another perspective;

[0042] Figure 5 It is a plan view of the internal structure of the power tool;

[0043] Figure 6 yes Figure 5 A plan view of the transmission structure and guide plate in FIG.

[0044] Figure 7 yes Figure 1 Left side view of the power tool;

[0045] Figure 8 yes Figure 7 A top view of the power tool;

[0046] Figure 9 yes Figure 1 Schematic diagram of another type of battery pack installed in the power tool;

[0047] Figure 10 is a schematic diagram of another embodiment of the transmission assembly. DETAILED DESCRIPTION

[0048] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the foregoing drawings.

[0049] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0050] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0051] In this application, the terms "connect," "combine," "couple," and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0052] In this application, it will be understood by those skilled in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0053] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0054] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to the other element "upper" or "lower", but also be indirectly connected to the other element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0055] Figure 1 Figure 1 is a schematic diagram of a power tool 10. The power tool 10 involved in this application can be a cutting tool, a grinding tool, or a pruning tool. In one embodiment, the power tool 10 can be a handheld power tool that the user must hold in order to perform an operation. The power tool 10 can be powered by either AC or DC power. When the power tool 10 uses DC power as its power source, the power tool 10 must be installed with a battery pack 710. When the power tool 10 uses AC power as its power source, the power tool 10 can be directly connected to the mains.

[0056] like Figures 1 to 4As shown, the power tool 10 includes a motor 100, a housing 200, an output assembly 300, a transmission assembly 400 and a grip 500. The housing 200 forms a storage space and at least partially accommodates the motor 100 and the transmission assembly 400. In this embodiment, the housing 200 includes a first housing 210, a second housing 220 and a third housing 230, wherein the space formed by the first housing 210 and the second housing 220 is used to accommodate the transmission assembly 400, and the space formed by the second housing 220 and the third housing 230 is used to accommodate the motor 100. In one embodiment, the grip 500 is composed of a left and a right halves of the housing. The grip 500 can be integrally formed with the housing 200, or it can be formed separately from the housing 200 and then installed and fixed.

[0057] The output assembly 300 extends in a front-to-rear direction and extends along a first straight line 301. The output assembly 300 can be used to perform different types of operations. For example, when the power tool 10 is a chain saw 20, the output assembly 300 outputs a cutting operation, and the first straight line 301 is the front-to-rear extension direction of the guide bar; when the power tool 10 is a band saw, the output assembly 300 outputs a grinding operation, and the first straight line is the front-to-rear extension direction of the sanding belt; when the power tool 10 is a pair of electric scissors, the output assembly 300 outputs a shearing operation, and the first straight line is the front-to-rear extension direction of the scissors attachment.

[0058] The motor 100 includes a motor shaft 110, which rotates about a motor axis 111. The rotational motion of the motor shaft 110 is transmitted to the output assembly 300 via the transmission assembly 400, thereby enabling various output operations. The transmission assembly 400 is connected to the motor shaft 110 at one end and to the output assembly 300 at the other end. The transmission assembly includes a first drive wheel 410 and a second drive wheel 420. The first drive wheel 410 is driven by the motor shaft 110 to rotate about a first axis 411, which is coaxial with the motor shaft 110. The second drive wheel 420 rotates about a second axis 421 and drives the output assembly 300.

[0059] In this embodiment, the motor axis 111 is substantially perpendicular to the first straight line 301. When the motor 110 is coaxial with the first drive wheel 410, the motor axis 111 coincides with the first axis 411. "Substantially perpendicular" here means that the angle between the motor axis 111 and the first straight line 301 is less than or equal to 20 degrees. In some embodiments, the angle between the motor axis 111 and the first straight line 301 is less than or equal to 10 degrees. The angle between the motor axis 111 and the first straight line 301 is less than or equal to 5 degrees. This achieves the effect of "horizontally inserting the motor."

[0060] The power tool 10 further includes a control panel 600 and a switch 530. The control panel 600 is electrically connected to the motor 100. The control panel 600 is provided with electrical components that can control the start and stop and / or operation of the motor 530. The user can control the operation of the motor 100 by operating the switch 530.

[0061] The following describes in detail a chain saw 20 as a specific embodiment of the power tool 10 . All the above descriptions applicable to the power tool 10 are also applicable to the chain saw 20 and will not be repeated here.

[0062] The output assembly 300 of the chainsaw 20 includes a chain 310, a guide plate 320, and a guard 330. The guide plate 320 supports the chain 310 for movement along the guide plate 320. In this embodiment, the output assembly 300 extends in the same direction as the guide plate 320. In other words, the guide plate 320 extends along a first straight line 301, which also corresponds to the front-to-back direction of the chainsaw 20. The chainsaw 20 also includes a guide plate adjustment mechanism 350, which adjusts the front-to-back direction of the guide plate 320 to tighten or loosen the chain 310 on the guide plate 320.

[0063] In one embodiment, if Figure 2 As shown, the transmission assembly 400 includes a belt 430, which transmits power to a first drive pulley 410 and a second drive pulley 420. The first drive pulley 410 is a driving pulley 412, and the second drive pulley 420 is a driven pulley 422. The rotation of the motor shaft 110 drives the driving pulley 412, which in turn, through the transmission of the belt 430, drives the driven pulley 422. In the chain saw 20, the output assembly 300 also includes a sprocket 340. The driven pulley 422 is coaxial with the sprocket 350. The rotation of the driven pulley 422 drives the sprocket 340, which in turn drives the chain 310 to move on the guide bar 320, achieving the cutting operation.

[0064] like Figure 5 and Figure 6 As shown, a rectangular coordinate system is established with the center point of the second drive wheel 420 as the origin 101. The rectangular coordinate system includes mutually perpendicular x- and y-axes. The x-axis is parallel to the first straight line 301, and the y-axis is perpendicular to the first straight line 301. The x-axis has a positive direction in front of the output assembly 300, and the y-axis has an upward positive direction. The second axis 421 passes through the origin 101. Therefore, the area formed by the positive x-axis and the positive y-axis is the first quadrant, the area formed by the negative x-axis and the positive y-axis is the second quadrant, the area formed by the negative x-axis and the negative y-axis is the third quadrant, and the area formed by the positive x-axis and the negative y-axis is the fourth quadrant.

[0065] In one embodiment, the motor 100 is at least partially located in the second quadrant of the rectangular coordinate system. The motor shaft 110 is located above the first straight line 301 .

[0066] In one embodiment, the motor 100 is completely located in the second quadrant of the rectangular coordinate system. Figure 6 In the plane rectangular coordinate system shown, the line connecting the intersection of the first axis 411 and the plane rectangular coordinate system to the origin 101 forms an axis line 450. The length of the axis line 450 is the distance between the first axis 411 and the second axis 421. The length of the axis line 450 is defined as the first length L. In one embodiment, the first length L is greater than or equal to 50 mm and less than or equal to 85 mm. In one embodiment, the first length L is greater than or equal to 60 mm and less than or equal to 80 mm. In one embodiment, the first length L is greater than or equal to 65 mm and less than or equal to 75 mm. In some embodiments, the first length L is approximately 65 mm, 69 mm or 73 mm. The first length L is limited so that the center distance of the transmission assembly 400 is longer, the motor 100 is closer to the user's hand, and the center of gravity of the entire machine is better optimized.

[0067] The angle between the axis line 450 and the positive direction of the y-axis is a first angle α. In one embodiment, the first angle α is greater than or equal to 20 degrees and less than or equal to 80 degrees. In one embodiment, the first angle α is greater than or equal to 30 degrees and less than or equal to 75 degrees. In one embodiment, the first angle α is greater than or equal to 40 degrees and less than or equal to 70 degrees. In one embodiment, the first angle α is greater than or equal to 45 degrees and less than or equal to 65 degrees. In one embodiment, the first angle α is greater than or equal to 50 degrees and less than or equal to 56 degrees. In some embodiments, the first angle α is approximately 45 degrees, 50 degrees, 55 degrees, or 60 degrees.

[0068] Continue to see Figure 5 In one embodiment, the control panel 600 is at least partially disposed in the third quadrant. In one embodiment, the control panel 600 is completely disposed in the third quadrant. The control panel 600 is tilted relative to the x-axis, and the angle formed by the control panel 600 and the x-axis is greater than or equal to 20 degrees and less than or equal to 70 degrees. The control panel 600 is located below the motor 100. The switch 530 is disposed obliquely below the control panel 600. In this way, the space enclosed by the motor 100, the second drive wheel 420, and the grip 500 can be fully utilized, making the overall structure compact.

[0069] Figure 7 is a left side view of the chain saw 20, Figure 7The center of gravity G of the power tool 10 and chainsaw 20 is shown. This refers to the center of gravity of the power tool 10 and chainsaw 20 when the battery pack 710 is installed. The motor axis 111 in this embodiment is substantially perpendicular to the first line 301 extending from the guide plate 320. Furthermore, the motor 110 is located in the second quadrant, placing the center of gravity G of the power tool 10 close to the hand. This significantly reduces the user's effort during long-term operation, whether cutting, grinding, or shearing.

[0070] Figure 8 1 is a top view of the power tool 10. A first plane 302 is defined passing through the first straight line 301. The first plane 302 substantially bisects the output assembly 300. A second plane 502 is defined passing through the grip portion 500. The second plane 502 is substantially parallel to or coincides with the first plane 302, and the second plane 502 bisects the grip portion 500. It should be noted that when the power tool is a chain saw 20, the first plane 302 bisects the guide plate 320 into two equal parts, and the second plane 502 bisects the grip portion 500. In one embodiment, the second plane 502 is the parting surface of the grip portion 500 during processing and molding.

[0071] In one embodiment, the distance between the first plane 302 and the second plane 502 is less than or equal to 12 mm. In one embodiment, the distance between the first plane 302 and the second plane 502 is less than or equal to 8 mm. In one embodiment, the distance between the first plane 302 and the second plane 502 is less than or equal to 5 mm. In one embodiment, the first plane 302 and the second plane 502 substantially coincide with each other. It should be noted that "substantially coincide" here means that the distance between the first plane 302 and the second plane 502 is less than or equal to 3 mm. With such a design, the lateral distance between the force applied by the user's hand to the grip 500 and the contact point between the chain 310 and the workpiece is almost zero, the chain saw 20 is not prone to deflection, and the user can more easily align it accurately and not cut crookedly.

[0072] also, Figure 8 The center of gravity G of the power tool 10 is also shown. According to the technical solution of the present application, the motor 110 is substantially perpendicular to the first plane 302, the motor 110 is located above the first straight line 301, and the motor 110 is located in the second quadrant, that is, above and behind the second driving wheel 420, thereby achieving Figure 8In the direction of the top view shown, the distance between the center of gravity G of the whole machine and the first plane 301 is small. In one embodiment, the distance between the center of gravity G of the whole machine and the first plane 302 is less than or equal to 10 mm. In one embodiment, the distance between the center of gravity G of the whole machine and the first plane 302 is less than or equal to 8 mm. In one embodiment, the distance between the center of gravity G of the whole machine and the first plane 302 is less than or equal to 5 mm. In one embodiment, the center of gravity G of the whole machine basically falls on the first plane 302, that is, the distance between the center of gravity G of the whole machine and the first plane 302 is less than or equal to 3 mm. This design makes the distance between the center of gravity G of the whole machine and the first plane 301 smaller, further avoiding the user from applying additional force to the power tool 10 due to the deviation of the center of gravity of the whole machine, thereby reducing factors that may cause user product fatigue.

[0073] In one embodiment, the maximum distance between any two of the first plane 302, the second plane 502, and the center of gravity G of the entire machine does not exceed 8 mm. In one embodiment, the maximum distance between any two of the first plane 302, the second plane 502, and the center of gravity G of the entire machine does not exceed 5 mm. In one embodiment, the first plane 302, the second plane 502, and the center of gravity G of the entire machine substantially coincide, i.e., the maximum distance between any two of these three is less than or equal to 3 mm. In other words, the technical solution provided by this application can simultaneously prevent skewed cutting and reduce user hand fatigue, further enhancing the user experience.

[0074] Figure 1 、 Figure 7 and Figure 9 Two types of battery packs are shown that can be installed in the power tool 10 and the chain saw 20. In one embodiment, Figure 1 and Figure 7 As shown, the battery pack 710 is a plug-in battery pack. The battery pack 710 is inserted into the accommodation space formed by the grip portion 500 in the first plug-in direction D1. The battery pack 710 is substantially cylindrical. Figure 9 As shown, the battery pack 720 is a sliding battery pack. The battery pack 710 is combined with the electronic connector at the battery pack combination portion 700 formed at the end of the grip portion 500 in the second plug-in direction D2. The battery pack 710 is roughly rectangular.

[0075] like Figure 10 FIG. 4 shows another embodiment of a transmission assembly 400. Transmission assembly 400 includes a transmission gear 440, which connects a first drive wheel 410 and a second drive wheel 420. First drive wheel 410 is a driving gear 441, and second drive wheel 420 is a driven gear 442. In this embodiment, transmission assembly 400 uses gear transmission for speed reduction. The specific operation is similar to the belt transmission described above and will not be further described here.

[0076] For the motor 100 of the present application, the maximum outer diameter D of the motor 100 is greater than or equal to 40 mm and less than or equal to 60 mm. In some embodiments, the maximum outer diameter D of the motor 100 is approximately 50 mm or 55 mm. The stack length H of the motor 100 is less than or equal to 20 mm. In some embodiments, the stack length H of the motor 100 is approximately 6 mm, 8 mm, 10 mm, 12 mm, or 14 mm.

[0077] The reduction ratio of the transmission assembly 400 is greater than 1 and less than or equal to 5. In one embodiment, the reduction ratio of the transmission assembly 400 is greater than or equal to 1.2 and less than or equal to 4.5. In one embodiment, the reduction ratio of the transmission assembly 400 is greater than or equal to 1.5 and less than or equal to 4. In one embodiment, the reduction ratio of the transmission assembly 400 is greater than or equal to 1.5 and less than or equal to 3.5. In some embodiments, the reduction ratio of the transmission assembly 400 is approximately 2, 2.5, or 3. In some embodiments, the rated output power of the motor 100 is approximately 250W, 275W, 300W, 325W, or 350W.

[0078] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims

1. A chain saw (10), comprising: A motor (100) comprising a motor shaft (110); Housing (200); An output component (300) is used for outputting work, and the output component extends along the direction of a first straight line (301); a transmission assembly (400), connected to the motor; A grip portion (500) for a user to grip; Its characteristics are: defining a first plane (302) passing through the first straight line, wherein the first plane substantially divides the output component into two halves, the motor shaft is substantially perpendicular to the first plane, and the motor shaft is located above the first straight line; The transmission assembly comprises a first drive wheel (410) and a second drive wheel (420); the first drive wheel is driven by the motor shaft to rotate around a first axis (411), the first axis being coaxial with the motor shaft; the second drive wheel rotates around a second axis (421) and drives the output assembly to move; A plane rectangular coordinate system is established with the center point of the second driving wheel as the origin (101), wherein the x-axis is parallel to the first straight line; the x-axis has the front of the output component as the positive direction, and the y-axis has the upward direction as the positive direction; and the motor is at least partially located in the second quadrant of the plane rectangular coordinate system.

2. The chain saw according to claim 1, wherein: The output assembly comprises a chain (310) and a guide plate (320), wherein the guide plate supports the chain, and the transmission assembly drives the chain to move on the guide plate.

3. The chain saw according to claim 1, wherein: The transmission assembly further comprises a belt (430), wherein the belt transmission connects the first drive wheel and the second drive wheel, wherein the first drive wheel is a driving pulley (412) and the second drive wheel is a driven pulley (422).

4. The chain saw according to claim 1, wherein: The transmission assembly further comprises a transmission gear (440), the transmission gear connecting the first drive wheel and the second drive wheel, wherein the first drive wheel is a driving gear (441) and the second drive wheel is a driven gear (442).

5. The chain saw according to claim 1, wherein: The chain saw further comprises a control board (600), the control board being electrically connected to the motor, and the control board being at least partially located in the third quadrant of the plane rectangular coordinate system.

6. The chain saw according to claim 1, wherein: The chain saw further comprises a control panel (600), the control panel being electrically connected to the motor, and the motor shaft being located above the control panel.

7. The chain saw according to claim 1, wherein: In the plane rectangular coordinate system, the line connecting the first axis and the origin forms an axis line (450), and the angle between the axis line and the positive direction of the y-axis is a first angle α, and the first angle α is greater than or equal to 20 degrees and less than or equal to 80 degrees.

8. The chain saw according to claim 1, wherein: A second plane (502) passing through the grip portion is defined, the second plane being substantially parallel to or overlapping the first plane, and the second plane dividing the grip portion into left and right halves; and a distance between the first plane and the second plane being less than or equal to 12 mm.

9. The chain saw according to claim 8, characterized in that The first plane substantially coincides with the second plane.

10. The chain saw according to claim 1, wherein The motor is an electric motor, and the maximum outer diameter D of the motor is less than or equal to 60 mm.

11. The chain saw according to claim 1, wherein The motor is an electric motor, and the stack length H of the motor is less than or equal to 20 mm.

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