Chain saw

Abstract

The utility model provides a chain saw. The chain saw comprises a main body shell; 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 utility model relates to a chain saw, especially a chain saw driven by a battery pack. BACKGROUND

[0002] As a garden tool, the chain saw can be used for felling trees and making timber, and has the advantages of convenient carrying and easy operation. In order to meet the requirement of cutting large-sized timber, a large output power needs to be provided so that the chain saw has strong power, and thus the size of the main body part is large. After long-time operation of the chain saw, the user will feel tired. Especially for the chain saw powered by direct current, the battery pack providing power output is installed on the chain saw body, and thus the volume is larger and the weight is heavier. How to provide a chain saw convenient for user operation is a technical problem to be solved by those skilled in the art. SUMMARY

[0003] The utility model aims at providing a chain saw convenient for user operation.

[0004] In view of this, the utility model provides a chain saw, which comprises:

[0005] a main body shell;

[0006] a guide plate, which is protrudingly arranged forward from the main body shell;

[0007] a saw chain, which is tautly arranged on the outer periphery of the guide plate;

[0008] an electric motor, which is arranged in the main body shell and rotates the saw chain along the outer periphery of the guide plate;

[0009] a handle, which has a gripping part for holding by an operator; and

[0010] at least one battery pack, which is detachably assembled to the main body shell and is adapted to supply power to the electric motor;

[0011] When the chain saw is observed from above in a state where the chain saw is placed on a horizontal support surface, the projection of the electric motor and the at least one battery pack on the horizontal support surface at least partially overlaps.

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

[0013] Further, the utility model further comprises:

[0014] a gearbox connected to the electric motor;

[0015] a power output part, which is formed with an output shaft and is connected to the gearbox so as to drive the saw chain;

[0016] When the chain saw is viewed from the side in a state where 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 portion is disposed at an angle to an extension axis along which the guide plate protrudes forward.

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

[0018] Further, when the chain saw is viewed from above in a state where the chain saw is placed on a horizontal support surface, a projection of the electric motor and the transmission gear of the transmission case on the horizontal support surface at least partially overlaps.

[0019] Further, when the chain saw is viewed from behind in a state where the chain saw is placed on a horizontal support surface, a projection of the battery pack and the transmission gear of the transmission case on a surface perpendicular to the horizontal support surface at least partially overlaps.

[0020] Further, the guide plate protrudes forward to form a first axis direction, and the battery pack is assembled to or disassembled from the main body case along a second axis direction, and the first axis direction and the second axis direction are perpendicular or obliquely intersected.

[0021] Further, a bottom portion of the main body case is configured with a battery mounting portion, the battery mounting portion is open toward the bottom portion direction, and when the battery pack is assembled to the battery mounting portion, a bottom portion 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 axis direction in which the guide plate protrudes forward, and a bottom portion of the first battery pack and a bottom portion of the second battery pack do not protrude from a bottom portion of the main body case; or,

[0023] The bottom portion of the first battery pack and the bottom portion of the second battery pack protrude from the bottom portion of the main body case to jointly constitute a horizontal support portion of the chain saw by the bottom portion of the first battery pack and the bottom portion of the second battery pack.

[0024] Further, when the chain saw is viewed from above in a state where the chain saw is placed on a horizontal support surface, a projection of the grip portion of the handle and the battery pack on the horizontal support surface does not coincide.

[0025] Further, the battery pack includes a first battery pack and a second battery pack arranged in parallel along an axis direction in which the guide plate protrudes forward, and the second battery pack is closer to the electric motor, and a projection of the electric motor and the second battery pack on the horizontal support surface at least partially overlaps.

[0026] Further, when the chain saw is placed on a horizontal support surface and viewed from above, the projection of the handle's gripping portion and the first battery pack on the horizontal support surface at least partially overlap.

[0027] Further, the projection of the handle's gripping portion and the first battery pack on the horizontal support surface at least partially overlap.

[0028] Compared with the prior art, the technical scheme of the utility model has the beneficial effects of:

[0029] When the chain saw is placed on a horizontal support surface and viewed from above, the projection of the electric motor and at least one battery pack on the horizontal support surface at least partially overlaps, so that the battery pack is closer to the front end of the chain saw, the center of gravity of the chain saw is further offset towards the front end, and thus the user can conveniently use and operate the chain saw. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the utility model or the technical scheme in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0031] Figure 1 The utility model specific embodiment 1 structure schematic view;

[0032] Figure 2 The utility model specific embodiment 1 electric motor and battery pack projection relationship schematic view;

[0033] Figure 3 The utility model specific embodiment 1 electric motor, battery pack, transmission gear three projection relationship schematic view;

[0034] Figure 4 The utility model specific embodiment 1 part structure schematic view;

[0035] Figure 5 The utility model specific embodiment 2 structure schematic view;

[0036] Figure 6 The utility model specific embodiment 2 electric motor and battery pack projection relationship schematic view;

[0037] Figure 7 The utility model specific embodiment 2 electric motor, battery pack, transmission gear three projection relationship schematic view;

[0038] Figure 8The utility model discloses concrete embodiment 3 structure schematic view.

[0039] Figure 9 The utility model discloses concrete embodiment 3 electric motor, holding portion, battery pack three projection relation schematic view.

[0040] Figure 10 The utility model discloses concrete embodiment with battery pack bottom as support portion structure schematic view.

[0041] Figure 11 The utility model discloses concrete embodiment 4 structure schematic view one.

[0042] Figure 12 The utility model discloses concrete embodiment 4 structure schematic view two.

[0043] Figure 13 The utility model discloses concrete embodiment 4 structure schematic view three. Specific implementation

[0044] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings, and obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of the utility model protection.

[0045]

Embodiment 1

[0046] Please refer to Figure 1 And Figure 2 Show, a chain saw 100, comprising:

[0047] Main body shell 10;

[0048] Guide plate 20, it is from main body shell 10 to the front protruding arrangement;

[0049] Saw chain 30, it is tightly arranged at the outer periphery of guide plate 20;

[0050] Electric motor 40, it is in main body shell 10, makes saw chain 30 rotate along the outer periphery of guide plate 20;

[0051] Handle 50, it has the holding portion 50a for the holding of operating personnel;And,

[0052] Battery pack 60, it is assembled in main body shell 10 in detachable mode, is suitable for the power supply of electric motor 40;

[0053] Wherein, when observing chain saw 100 from the upper side in the state that chain saw 100 is placed on horizontal support surface S, the projection of electric motor 40 and at least one battery pack 60 on horizontal support surface S at least partially overlaps.

[0054] Specifically, in the present embodiment 1, the above-mentioned battery pack 60 is one.

[0055] Please continue to refer to Figure 2 When the chain saw 100 is placed on the horizontal support surface S and the chain saw 100 is observed from above, the projection area of the electric motor 40 on the horizontal support surface S is as shown by S2, the projection area of the battery pack 60 on the horizontal support surface S is as shown by S1, the projection area S2 at least partially overlaps the projection area S1, and the overlapping area is as shown by 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 offset towards the front end, and when the user operates the chain saw 100 to perform cutting work, the chain saw 100 will be tilted downward and forward due to the further offset of the center of gravity of the chain saw 100 towards the front end, so that the user will be more labor-saving when cutting downward, and in this way, the user can be facilitated to use and operate.

[0057] Please continue to refer to Figure 1 and Figure 2 , and in combination with Figure 4 It is shown that the electric motor 40 is arranged above the battery pack 60.

[0058] Further, please continue to refer to Figure 1 , Figure 2 and Figure 4 It is shown that the chain saw 100 further comprises:

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

[0060] a power output part 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 the chain saw 100 is observed from the side, the connecting line L1 of the axis of the output shaft of the electric motor 40 and the axis of the output shaft of the power output part 80 is arranged at an included angle β with the extension axis L2 of the guide plate 20 protruding forward.

[0062] Specifically, the gearbox 70 comprises 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 engaged with the transmission gear 70b, the transmission gear 70b is connected to the output shaft of the power output part 80, and when the electric motor 40 operates to rotate, the transmission gear 70b engaged with the output gear 70a is driven to rotate, and in turn the output shaft of the power output part 80 is driven to rotate, and in turn the saw chain 30 is driven.

[0063] Referring to Figure 2 It is shown that the included angle β is obtuse.

[0064] Further, referring to Figure 3 , 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, the projection of the electric motor 40 and the transmission gear 70b 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, 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 a shaded area.

[0066] In addition, when the chain saw 100 is viewed from behind in a state where the chain saw 100 is placed on the horizontal support surface S, the projection of the battery pack 60 and the transmission gear 70b of the gearbox 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, 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 and the projection area H1 at least partially overlap, and the overlapping area is shown as a shaded area.

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

[0069] Further, referring to Figure 2 and Figure 4 , the guide plate 20 protrudes forward to form a first axis direction, as shown by the extension axis L2, and the battery pack 60 is assembled and disassembled to the main body shell 10 along a second axis direction M, the first axis direction L2 and the second axis direction M are perpendicular or obliquely intersected, so that the user can plug in and pull out the battery pack 60 at a more convenient angle, and the battery pack 60 does not affect the user's grip.

[0070] Further, the bottom of the main body shell 10 is provided with a battery mounting portion 90, which is open towards the bottom direction, and when the battery pack 60 is assembled in the battery mounting portion 90, the bottom of the battery pack 60 is at least partially exposed.

[0071]

Embodiment 2

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

[0073] Referring to Figure 5 , Figure 6 andFigure 7 As shown, the battery pack 60 includes a first battery pack 60a and a second battery pack 60b arranged in parallel along the axis direction of the protruding extension of the guide plate 20 forward, the bottom of the first battery pack 60 and the second battery pack 60 do not protrude from the bottom of the main body shell 10.

[0074] Of course, the bottom of the first battery pack 60 and the second battery pack 60 can also protrude from the bottom of the main body shell 10 to jointly constitute the horizontal support portion of the chain saw 100 by the bottom of the first battery pack 60 and the bottom of the second battery pack 60, as Figure 10 shown.

[0075] Further continuing to refer to Figure 6 shown, when observing the chain saw 100 from above in the state that the chain saw 100 is placed on the horizontal support surface S, the holding portion 50a of the handle 50 does not coincide with the projection of the battery pack 60 on the horizontal support surface S.

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

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

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

[0079] Further, referring to Figure 7 shown, when observing the chain saw 100 from behind in the state that the chain saw 100 is placed on the horizontal support surface S, the projection of the battery pack 60 and the transmission gear 70b of the gearbox 70 on the plane perpendicular to the horizontal support surface S at least partially overlaps.

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

[0081] Continuing to refer to Figure 7As shown in FIGS. 1, 2, 3 and 4, when the chain saw 100 is placed on the horizontal support surface S and viewed from above, the projection of the electric motor 40 on the horizontal support surface S at least partially overlaps the projection of the transmission gear 70b of the gearbox 70 on the horizontal support surface S.

[0082] Specifically, the projection area of the electric motor 40 on the horizontal support surface S is as shown by S2, the projection area of the transmission gear 70b of the gearbox 70 on the horizontal support surface S is as shown by S4, the projection area S2 at least partially overlaps the projection area S4, and the overlapping area is as shown by the hatched area in FIG. 4. Figure 7

[0083]

Example 3

[0084] This example 3 is basically similar to the structure and principle of the above-mentioned example 1 and example 2, and the difference is that when the chain saw 100 is placed on the horizontal support surface S and viewed from above, the holding portion 50a of the handle 50 at least partially coincides with the projection of the battery pack 60 on the horizontal support surface S.

[0085] Specifically, as shown in FIGS. 1, 2, 3 and 4, when the chain saw 100 is placed on the horizontal support surface S and viewed from above, the projection of the electric motor 40 on the horizontal support surface S at least partially overlaps the projection of the transmission gear 70b of the gearbox 70 on the horizontal support surface S. Figure 8 and Figure 9 Specifically, as shown in FIGS. 1, 2, 3 and 4, when the chain saw 100 is placed on the horizontal support surface S and viewed from above, the projection of the electric motor 40 on the horizontal support surface S at least partially overlaps the projection of the transmission gear 70b of the gearbox 70 on the horizontal support surface S.

[0086] Further, the holding portion 50a of the handle 50 at least partially coincides with the projection of the first battery pack 60a on the horizontal support surface S, and more optionally, the projection S3 of the holding portion 50a of the handle 50 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 utility model is viewed from above in the state of being placed on the horizontal support surface S, the projection of the electric motor 40 on the horizontal support surface S at least partially overlaps the projection of at least one battery pack 60 on the horizontal support surface S, so that the battery pack 60 is closer to the front end of the chain saw 100, the center of gravity of the chain saw 100 is further offset towards the front end, and thus the user can conveniently use and operate.

[0088]

Example 4

[0089] ​The embodiment 4 is basically similar to the above-mentioned embodiments 1, 2 and 3 in structure and principle, and the difference is that the battery mounting portion 90 arranged at the bottom of the main body shell 10 is closed toward the bottom direction to ensure that the battery pack 60 is not in contact with the horizontal support surface S when the battery pack 60 is mounted in the battery mounting portion 90 in the state that the chain saw 100 is placed on the horizontal support surface S.

[0090] With reference to Figure 11 , Figure 12 and Figure 13 in detail, the battery mounting portion 90 includes an electrical connection port 90a and a mounting cavity 90b for accommodating the battery pack 60. When the battery pack 60 is mounted in the mounting cavity 90b, the discharge break of the battery pack 60 is inserted into the electrical connection port 90a.

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

[0092] Finally, it should be pointed out that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that the technical solutions recorded in the above-mentioned embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. Such modifications or replacements do not make the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A chain saw comprising: a main body case; a guide plate protruding forward from the main body case; a chain saw chain tensioned around the outer periphery of the guide plate; an electric motor provided in the main body case to rotate the chain saw chain around the outer periphery of the guide plate; a handle having a grip portion to be held by an operator; and at least one battery pack removably attached to the main body case to supply power to the electric motor, wherein, when the chain saw is viewed from above in a state where the chain saw is placed on a horizontal support surface, a projection of the electric motor and the at least one battery pack on the horizontal support surface at least partially overlaps. The electric motor is disposed above the battery pack.

2. The chain saw of claim 1, wherein Further comprising:

3. The chain saw according to claim 1 or 2, characterized in that a transmission case connected to the electric motor; a power output portion formed with an output shaft and connected to the transmission case to drive the chain saw chain, wherein, when the chain saw is viewed from the side in a state where the chain saw is placed on a horizontal support surface, a line connecting the center axis of the output shaft of the electric motor and the center axis of the output shaft of the power output portion is disposed at an angle to the extension axis of the guide plate protruding forward. The angle is an obtuse angle.

4. The chain saw of claim 3, wherein: When the chain saw is viewed from above in a state where the chain saw is placed on a horizontal support surface, a projection of the electric motor and the transmission gear of the transmission case on the horizontal support surface at least partially overlaps.

5. The chain saw of claim 3, wherein: When the chain saw is viewed from the rear in a state where the chain saw is placed on a horizontal support surface, a projection of the battery pack and the transmission gear of the transmission case on a surface perpendicular to the horizontal support surface at least partially overlaps.

6. The chain saw of claim 3, wherein: The guide plate protrudes forward to form a first axis direction, and the battery pack is removably attached to the main body case in a second axis direction, the first axis direction and the second axis direction being perpendicular or obliquely intersected.

7. The chain saw of claim 1 or 2, characterized in that: The bottom of the main body case is provided with a battery mounting portion, which is open toward the bottom direction, and when the battery pack is attached to the battery mounting portion, the bottom of the battery pack is at least partially exposed.

8. The chain saw of claim 1 or 2, characterized in that: The battery pack includes a first battery pack and a second battery pack arranged in parallel along the axis 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 body case; or 9. The chain saw of claim 8, wherein: The bottoms of the first battery pack and the second battery pack protrude from the bottom of the main body case to jointly form a horizontal support portion of the chain saw through the bottoms of the first battery pack and the second battery pack. When the chain saw is viewed from above in a state where the chain saw is placed on a horizontal support surface, the grip portion of the handle and the projection of the battery pack on the horizontal support surface do not coincide.

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

11. The chain saw of claim 1 or 2, characterized in that: When the chain saw is viewed from above in a state where the chain saw is placed on a horizontal support surface, the grip portion of the handle and the projection of the battery pack on the horizontal support surface at least partially coincide.

12. The chain saw of claim 11, wherein: ​ 13. The chain saw of claim 12, wherein: The grip portion of the handle at least partially coincides with a projection of the first battery pack on the horizontal support surface.

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