Chain saw

Abstract

The present invention provides a chainsaw comprising: a main body housing; a guide plate provided so as to protrude forward from the main body case; the saw chain is arranged on the periphery of the guide plate in a tensioning manner; an electric motor which is provided inside the main body housing and which rotates the saw chain along the outer periphery of the guide plate; a handle having a gripping portion to be gripped by an operator; the at least one battery pack is assembled on the main body shell in a detachable manner and is suitable for supplying power to the electric motor; when the chain saw is observed from above in the state that the chain saw is arranged on the horizontal supporting surface, the projection of the electric motor and the projection of the at least one battery pack on the horizontal supporting surface are at least partially overlapped. When a user operates and uses the chain saw to conduct cutting operation, due to the fact that the gravity center of the chain saw further deviates towards the front end, the chain saw inclines downwards and forwards due to the dead weight, more labor is saved when the user conducts cutting operation downwards, and the cutting efficiency is improved. Therefore, the user can use and operate conveniently.

Description

Technical Field

[0001] The invention relates to a chain saw, in particular to a chain saw driven by a battery pack. Background Art

[0002] As a garden tool, a chain saw can be used by users for felling and lumbering, etc. It has the advantages of being easy to carry and easy to operate. In order to cut larger wood, a larger output power needs to be set so that the chain saw has stronger power, so the size of its main part is larger. Users will feel very tired after operating the chain saw for a long time. Especially for a chain saw powered by DC, since the battery pack that provides its power output is installed on the chain saw body, it is larger in size and heavier in weight. How to provide a chain saw that is convenient for users to use and operate is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0003] The invention aims to provide a chain saw which is convenient for users to operate.

[0004] In view of this, the present invention provides a chain saw, comprising:

[0005] Main body shell;

[0006] A guide plate, which is arranged to protrude forward from the main housing;

[0007] a saw chain, which is tensioned and arranged on the outer periphery of the guide bar;

[0008] an electric motor disposed in the main housing to rotate the saw chain along the outer periphery of the guide bar;

[0009] a handle having a grip portion for a worker to hold; and

[0010] at least one battery pack, which is detachably assembled to the main housing and is suitable for supplying power to the electric motor;

[0011] Wherein, when the chain saw is observed from above in a state where the chain saw is placed on a horizontal support surface, the projections of the electric motor and at least one of the battery packs on the horizontal support surface at least partially overlap.

[0012] Furthermore, the electric motor is arranged above the battery pack.

[0013] Furthermore, it also includes:

[0014] a gearbox connected to the electric motor;

[0015] A power output part, formed with an output shaft and connected to the gearbox to drive the saw chain;

[0016] When the chain saw is observed from the side when the chain saw is placed on a horizontal support surface, a line connecting the axis of the output shaft of the electric motor and the axis of the output shaft of the power output unit is arranged at an angle to an extension axis of the guide plate protruding forward.

[0017] Furthermore, the angle is an obtuse angle.

[0018] Further, when the chain saw is observed from above in a state where the chain saw is placed on a horizontal support surface, projections of the electric motor and the transmission gear of the gearbox on the horizontal support surface at least partially overlap.

[0019] Further, when the chain saw is observed from the rear in a state where the chain saw is placed on a horizontal supporting surface, projections of the battery pack and the transmission gear of the gearbox on a surface perpendicular to the horizontal supporting surface at least partially overlap.

[0020] Furthermore, the guide plate protrudes forward and extends to form a first axial direction, and the battery pack is assembled and disassembled to the main housing along a second axial direction, and the first axial direction intersects the second axial direction perpendicularly or obliquely.

[0021] Furthermore, a battery mounting portion is disposed at the bottom of the main housing, and the battery mounting portion is open toward the bottom. When the battery pack is assembled in the battery mounting portion, the bottom of the battery pack is at least partially exposed.

[0022] Further, the battery pack includes a first battery pack and a second battery pack arranged in parallel along an axial direction of the guide plate protruding forward, and the bottoms of the first battery pack and the second battery pack do not protrude from the bottom of the main housing; or,

[0023] The bottoms of the first battery pack and the second battery pack protrude from the bottom of the main housing, so that the bottom of the first battery pack and the bottom of the second battery pack together form a horizontal supporting portion of the chain saw.

[0024] Further, when the chain saw is observed from above in a state where the chain saw is placed on a horizontal supporting surface, the gripping portion of the handle and the projection of the battery pack on the horizontal supporting surface do not overlap.

[0025] Furthermore, the battery pack includes a first battery pack and a second battery pack arranged in parallel along an axial direction of the guide plate protruding forward, the second battery pack is closer to the electric motor, and the projections of the electric motor and the second battery pack on the horizontal support surface at least partially overlap.

[0026] Further, when the chain saw is observed from above in a state where the chain saw is placed on a horizontal support surface, the gripping portion of the handle at least partially overlaps with a projection of the battery pack on the horizontal support surface.

[0027] Furthermore, the gripping portion of the handle at least partially overlaps with a projection of the first battery pack on the horizontal supporting surface.

[0028] Compared with the prior art, the beneficial technical effects of the technical solution of the present invention are:

[0029] When the chain saw provided by the present invention is placed on a horizontal support surface and observed from above, the projections of the electric motor and at least one battery pack on the horizontal support surface at least partially overlap, so that the battery pack will be closer to the front end of the chain saw, causing the center of gravity of the chain saw to be further offset toward the front end, thereby making it easier for users to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 : Schematic diagram of the structure of a specific embodiment 1 of the present invention;

[0032] Figure 2 : Schematic diagram of the projection relationship between the electric motor and the battery pack in the first embodiment of the present invention;

[0033] Figure 3 : Schematic diagram of the projection relationship among the electric motor, the battery pack and the transmission gear in the first embodiment of the present invention;

[0034] Figure 4 : A partial structural diagram of a specific embodiment 1 of the present invention;

[0035] Figure 5 : Schematic diagram of the structure of specific embodiment 2 of the present invention;

[0036] Figure 6 : Schematic diagram of the projection relationship between the electric motor and the battery pack in the second specific embodiment of the present invention;

[0037] Figure 7 : Schematic diagram of the projection relationship among the electric motor, battery pack and transmission gear in specific embodiment 2 of the present invention;

[0038] Figure 8 : Schematic diagram of the structure of specific embodiment 3 of the present invention;

[0039] Fig. 9 : Schematic diagram of the projection relationship among the electric motor, the gripping part and the battery pack in the specific embodiment 3 of the present invention;

[0040] Fig.10 : A schematic diagram of a structure in which the bottom of the battery pack is used as a support part in a specific embodiment of the present invention;

[0041] Fig.11 : One of the structural schematic diagrams of specific embodiment 4 of the present invention;

[0042] Fig.12 : The second structural diagram of the specific embodiment 4 of the present invention;

[0043] Fig.13 : The third structural diagram of specific embodiment 4 of the present invention. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] [Example 1]

[0046] Please refer to Figure 1 and Figure 2 As shown, a chain saw 100 comprises:

[0047] Main body shell 10;

[0048] A guide plate 20 is provided protruding forward from the main housing 10;

[0049] A saw chain 30 , which is tensioned and arranged on the outer periphery of the guide bar 20 ;

[0050] an electric motor 40 disposed in the main housing 10 to rotate the saw chain 30 along the outer circumference of the guide bar 20;

[0051] a handle 50 having a grip portion 50a for a worker to hold; and

[0052] A battery pack 60 , which is detachably assembled to the main housing 10 and is suitable for supplying power to the electric motor 40 ;

[0053] When the chain saw 100 is placed on the horizontal support surface S and the chain saw 100 is observed from above, the projections of the electric motor 40 and the at least one battery pack 60 on the horizontal support surface S at least partially overlap.

[0054] Specifically, in the first embodiment, there is only one battery pack 60 .

[0055] Please continue to refer to Figure 2 As shown, when the chain saw 100 is placed on a horizontal support surface S and observed from above, the projection area of ​​the electric motor 40 on the horizontal support surface S is shown as S2, and the projection area of ​​the battery pack 60 on the horizontal support surface S is shown as S1. The projection area S2 at least partially overlaps with the projection area S1, and the overlapping area is shown as the shaded area.

[0056] In this way, the battery pack 60 will be closer to the front end of the chain saw 100, so that the center of gravity of the chain saw 100 is further shifted toward the front end. When the user operates the chain saw 100 to perform cutting operations, since the center of gravity of the chain saw 100 is further shifted toward the front end, the chain saw 100 is tilted downward and forward due to its own weight, and the user will save more effort when performing cutting operations downward, which can facilitate the user's operation.

[0057] Please continue to refer to Figure 1 and Figure 2 , and combined Figure 4 As shown, the electric motor 40 is disposed above the battery pack 60 .

[0058] Further, continue to refer to Figure 1 , Figure 2 and Figure 4 As shown, the chain saw 100 further includes:

[0059] a gearbox 70 connected to the electric motor 40;

[0060] A power output unit 80 formed with an output shaft and connected to the gearbox 70 to drive the saw chain 30;

[0061] When the chain saw 100 is placed on the horizontal support surface S and viewed from the side, a line L1 connecting the axes of the output shafts of the electric motor 40 and the power output unit 80 forms an angle β with an extended axis L2 of the guide plate 20 protruding forward.

[0062] Specifically, the gearbox 70 includes an output gear 70a and a transmission gear 70b. The output shaft of the electric motor 40 is connected to the output gear 70a in the gearbox 70. The output gear 70a is meshed with the transmission gear 70b. The transmission gear 70b is connected to the output shaft of the power output unit 80. When the electric motor 40 rotates, the output gear 70a drives the meshed transmission gear 70b to rotate, thereby driving the output shaft of the power output unit 80 to rotate, and then driving the saw chain 30.

[0063] Reference Figure 2 As shown, the angle β is an obtuse angle.

[0064] Further, refer to Figure 3As shown, when the chain saw 100 is viewed from above in a state where the chain saw 100 is placed on the horizontal support surface S, projections of the electric motor 40 and the transmission gear 70 b of the gearbox 70 on the horizontal support surface S at least partially overlap.

[0065] Specifically, the projection area of ​​the electric motor 40 on the horizontal support surface S is shown as S2, and the projection area of ​​the transmission gear 70b of the gearbox 70 on the horizontal support surface S is shown as S4. The projection area S2 at least partially overlaps with the projection area S4, and the overlapping area is shown as the shaded area.

[0066] In addition, when the chain saw 100 is viewed from the rear in a state where the chain saw 100 is placed on the horizontal support surface S, projections of the battery pack 60 and the transmission gear 70 b of the transmission 70 on a surface perpendicular to the horizontal support surface S at least partially overlap.

[0067] Specifically, the projection area of ​​the battery pack 60 on the surface perpendicular to the horizontal support surface S is shown as H2, and the projection area of ​​the transmission gear 70b of the gearbox 70 on the surface perpendicular to the horizontal support surface S is shown as H1. The projection area H2 at least partially overlaps with the projection area H1, and the overlapping area is shown as the shaded area.

[0068] In this way, while ensuring that the center of gravity of the chain saw 100 is further offset toward the front end, the structural layout is more compact and the volume of the chain saw is reduced.

[0069] Further, continue to refer to Figure 2 and Figure 4 As shown, the guide plate 20 protrudes and extends forward to form a first axial direction. As shown by the extended axis L2, the battery pack 60 is assembled and disassembled in the main housing 10 along the second axial direction M. The first axial direction L2 intersects the second axial direction M vertically or obliquely, so that the user can plug and unplug the battery pack 60 at a more convenient angle, and the battery pack 60 will not affect the user's grip.

[0070] Furthermore, a battery mounting portion 90 is disposed at the bottom of the main housing 10 . The battery mounting portion 90 is open toward the bottom. When the battery pack 60 is assembled in the battery mounting portion 90 , at least a portion of the bottom of the battery pack 60 is exposed.

[0071] [Example 2]

[0072] The structure and principle of the present embodiment 2 are basically similar to those of the above-mentioned embodiment 1, except that: the present embodiment 2 has two battery packs 60, including a first battery pack 60a and a second battery pack 60b.

[0073] Reference Figure 5 , Figure 6 and Figure 7As shown, the battery pack 60 includes a first battery pack 60 a and a second battery pack 60 b arranged in parallel along the axial direction of the guide plate 20 protruding forward, and the bottoms of the first battery pack 60 and the second battery pack 60 do not protrude from the bottom of the main housing 10 .

[0074] Of course, the bottom of the first battery pack 60 and the second battery pack 60 may also protrude from the bottom of the main housing 10, so that the bottom of the first battery pack 60 and the bottom of the second battery pack 60 together form a horizontal support portion of the chain saw 100, such as Fig.10 shown.

[0075] Further reference Figure 6 As shown, when the chain saw 100 is placed on the horizontal support surface S and the chain saw 100 is observed from above, the gripping portion 50 a of the handle 50 and the projection of the battery pack 60 on the horizontal support surface S do not overlap.

[0076] Specifically, the projection area of ​​the gripping portion 50a of the handle 50 on the horizontal support surface S is shown as S3, and the projection areas of the first battery pack 60a and the second battery pack 60b on the horizontal support surface S are shown as S1a and S1b respectively, and the projection area S3 does not overlap with the projection areas S1a and S1b.

[0077] Furthermore, the second battery pack 60 b is closer to the electric motor 40 , and projections of the electric motor 40 and the second battery pack 60 b on the horizontal support surface S at least partially overlap.

[0078] Specifically, the projection area of ​​the electric motor 40 on the horizontal support surface S is shown as S2, and the projection area of ​​the second battery pack 60b on the horizontal support surface S is shown as S1b. The projection area S2 partially overlaps with the projection area S1b. Figure 6 Shown in the shaded area.

[0079] Further, refer to Figure 7 As shown, when the chain saw 100 is placed on the horizontal support surface S and viewed from the rear, the projections of the battery pack 60 and the transmission gear 70 b of the gearbox 70 on the surface perpendicular to the horizontal support surface S at least partially overlap.

[0080] Specifically, the projection area of ​​the battery pack 60 on the surface perpendicular to the horizontal support surface S is shown as H2, and the projection area of ​​the transmission gear 70b of the gearbox 70 on the surface perpendicular to the horizontal support surface S is shown as H1. The projection area H2 at least partially overlaps with the projection area H1, and the overlapping area is shown as the shaded area.

[0081] Continue to refer to Figure 7As shown, when the chain saw 100 is viewed from above in a state where the chain saw 100 is placed on the horizontal support surface S, projections of the electric motor 40 and the transmission gear 70 b of the gearbox 70 on the horizontal support surface S at least partially overlap.

[0082] Specifically, the projection area of ​​the electric motor 40 on the horizontal support surface S is shown as S2, and the projection area of ​​the transmission gear 70b of the gearbox 70 on the horizontal support surface S is shown as S4. The projection area S2 and the projection area S4 at least partially overlap, and the overlapping area is shown as Figure 7 Shown in the shaded area.

[0083] [Example 3]

[0084] The structure and principle of this embodiment 3 are basically similar to those of the above-mentioned embodiments 1 and 2, and the difference lies in that when the chain saw 100 is observed from above when the chain saw 100 is placed on the horizontal support surface S, the gripping portion 50a of the handle 50 and the projection of the battery pack 60 on the horizontal support surface S at least partially overlap.

[0085] Specific reference Figure 8 and Fig. 9 As shown, when the chain saw 100 is placed on a horizontal support surface S and observed from above, the projection of the gripping portion 50a of the handle 50 on the horizontal support surface S is shown as S3, and the projection areas of the first battery pack 60a and the second battery pack 60b on the horizontal support surface S are shown as S1a and S1b respectively, and the projection area S3 at least partially overlaps with the projection areas S1a and S1b.

[0086] Furthermore, the gripping portion 50a of the handle 50 at least partially overlaps with the projection of the first battery pack 60a on the horizontal support surface S. More preferably, the projection S3 of the gripping portion 50a of the handle 50 on the horizontal support surface S covers the projection area S1a of the first battery pack 60a on the horizontal support surface S, and partially covers the projection area S1b of the second battery pack 60b on the horizontal support surface S.

[0087] When the chain saw 100 provided by the present invention is placed on a horizontal support surface S and observed from above, the projections of the electric motor 40 and at least one battery pack 60 on the horizontal support surface S at least partially overlap, so that the battery pack 60 will be closer to the front end of the chain saw 100, so that the center of gravity of the chain saw 100 is further shifted toward the front end, which can facilitate user operation.

[0088] [Example 4]

[0089] The structure and principle of the present embodiment 4 are basically similar to those of the above-mentioned embodiments 1, 2 and 3, except that the battery mounting portion 90 disposed at the bottom of the main housing 10 is closed toward the bottom to ensure that when the chain saw 100 is placed on the horizontal support surface S, the battery pack 60 is prevented from contacting the horizontal support surface S when the battery pack 60 is installed in the battery mounting portion 90.

[0090] Specific reference Fig.11 , Fig.12 and Fig.13 As shown, the battery mounting portion 90 includes an electrical connection port 90a and an installation cavity 90b for accommodating the battery pack 60. When the battery pack 60 is installed in the installation cavity 90b, the discharge port of the battery pack 60 is plugged into the electrical connection port 90a.

[0091] In addition, it is necessary to further explain that the above-mentioned battery pack 60, including the first battery pack 60a and the second battery pack 60b, can be directly detachably connected to the main shell, and can also be connected to the main shell through an adapter. Those skilled in the art should know that whether the battery pack is directly detachably assembled on the main shell or connected to the main shell through an adapter, it should be within the protection scope of the present invention.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chain saw comprising: Main body shell; A guide plate, which is arranged to protrude forward from the main housing; a saw chain, which is tensioned and arranged on the outer periphery of the guide bar; an electric motor disposed in the main housing to rotate the saw chain along the outer periphery of the guide bar; A handle having a grip portion for an operator to hold; as well as, at least one battery pack, which is detachably assembled to the main housing and is suitable for supplying power to the electric motor; The invention is characterized in that when the chain saw is observed from above in a state where the chain saw is placed on a horizontal support surface, the projections of the electric motor and at least one battery pack on the horizontal support surface at least partially overlap.

2. The chain saw according to claim 1, characterized in that The electric motor is disposed above the battery pack.

3. The chain saw according to claim 1 or 2, characterized in that: Also includes: a gearbox connected to the electric motor; A power output part, formed with an output shaft and connected to the gearbox to drive the saw chain; When the chain saw is observed from the side when the chain saw is placed on a horizontal support surface, a line connecting the axis of the output shaft of the electric motor and the axis of the output shaft of the power output unit is arranged at an angle to an extension axis of the guide plate protruding forward.

4. The chain saw according to claim 3, characterized in that: The included angle is an obtuse angle.

5. The chain saw according to claim 3, characterized in that: When the chain saw is observed from above in a state where the chain saw is placed on a horizontal support surface, projections of the electric motor and the transmission gear of the gearbox on the horizontal support surface at least partially overlap.

6. The chain saw according to claim 3, characterized in that: When the chain saw is observed from the rear in a state where the chain saw is placed on a horizontal supporting surface, projections of the battery pack and the transmission gear of the gearbox on a surface perpendicular to the horizontal supporting surface at least partially overlap.

7. The chain saw according to claim 1 or 2, characterized in that: The guide plate protrudes forward and extends to form a first axial direction. The battery pack is assembled and disassembled to the main housing along a second axial direction. The first axial direction intersects the second axial direction perpendicularly or obliquely.

8. The chain saw according to claim 1 or 2, characterized in that: A battery mounting portion is disposed at the bottom of the main housing, and the battery mounting portion is open toward the bottom. When the battery pack is assembled in the battery mounting portion, at least a portion of the bottom of the battery pack is exposed.

9. The chain saw according to claim 8, characterized in that: The battery pack includes a first battery pack and a second battery pack arranged in parallel along an axial direction of the guide plate protruding forward, and the bottoms of the first battery pack and the second battery pack do not protrude from the bottom of the main housing; or, The bottoms of the first battery pack and the second battery pack protrude from the bottom of the main housing, so that the bottom of the first battery pack and the bottom of the second battery pack together form a horizontal supporting portion of the chain saw.

10. The chain saw according to claim 1 or 2, characterized in that: When the chain saw is observed from above in a state where the chain saw is placed on a horizontal support surface, the gripping portion of the handle does not overlap with a projection of the battery pack on the horizontal support surface.

11. The chain saw according to claim 1 or 2, characterized in that: The battery pack includes a first battery pack and a second battery pack arranged in parallel along an axial direction of the guide plate protruding forward, the second battery pack is closer to the electric motor, and the projections of the electric motor and the second battery pack on the horizontal support surface at least partially overlap.

12. The chain saw according to claim 11, characterized in that: When the chain saw is observed from above in a state where the chain saw is placed on a horizontal support surface, the gripping portion of the handle at least partially overlaps with a projection of the battery pack on the horizontal support surface.

13. The chain saw according to claim 12, characterized in that: The gripping portion of the handle at least partially overlaps with a projection of the first battery pack on the horizontal supporting surface.

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