CN113510665B - Electric tool and battery pack mounting mechanism thereof - Google Patents

Electric tool and battery pack mounting mechanism thereof Download PDF

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Publication number
CN113510665B
CN113510665B CN202110311745.XA CN202110311745A CN113510665B CN 113510665 B CN113510665 B CN 113510665B CN 202110311745 A CN202110311745 A CN 202110311745A CN 113510665 B CN113510665 B CN 113510665B
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China
Prior art keywords
battery pack
housing
terminal
terminal group
mounting mechanism
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CN202110311745.XA
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CN113510665A (en
Inventor
刘强
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Kewei Technology Nantong Co ltd
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Suzhou Dake Investment Consulting Co ltd
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Priority to CN202110311745.XA priority Critical patent/CN113510665B/en
Publication of CN113510665A publication Critical patent/CN113510665A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02Construction of casings, bodies or handles
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The application provides an electric tool and a battery pack mounting mechanism thereof, wherein the battery pack mounting mechanism comprises a shell and a sliding space formed by the shell, the sliding space extends along a first direction, and the shell is provided with a first end and a second end; the sliding space penetrates through the first end, the battery pack is allowed to be mounted to the shell along the first direction and is kept at a first end position, and the battery pack mounting mechanism is configured to enable the battery pack to protrude out of the first end in the second direction by a dimension d1; the sliding space also penetrates through the second end, the battery pack is allowed to be mounted to the shell along the second direction and is kept at a second end position, and the battery pack mounting mechanism is configured to enable the battery pack to protrude out of the first end along the second direction by a dimension d2; d1 is greater than d2, and the second direction is opposite to the first direction. The battery pack can be inserted in two directions, so that the outer contour of the battery pack and even the outer contour of the electric tool can be properly adjusted, and the electric tool can be suitable for a narrow space; in addition, the bidirectional plug-in connection is also beneficial to simplifying the installation process of the battery pack and improving the user experience.

Description

Electric tool and battery pack mounting mechanism thereof
Technical Field
The present application relates to the field of power tools, and more particularly, to a power tool and a battery pack mounting mechanism thereof.
Background
Compared with a manual tool, the electric tool has the advantages of high efficiency, high precision and the like. The lithium electric tool adopts a lithium battery as a power supply, is not limited by a cable any more, and has wider application scenes. Fig. 1 shows an angle grinder, which is powered by a battery pack a, the battery pack a is mounted to a tool body B from top to bottom, the upper end of the battery pack a protrudes from the upper end surface S of the tool body B, and in the scenario shown in fig. 1, the space above the angle grinder is limited, so that grinding work is difficult to perform in the scenario.
Disclosure of Invention
The application provides an electric tool capable of realizing a narrow space and a battery pack mounting mechanism thereof.
Specifically, the present application provides a battery pack mounting mechanism of an electric tool, the battery pack mounting mechanism including a housing and a sliding space formed by the housing, the sliding space extending along a first direction, the housing having a first end and a second end aligned along the first direction; the sliding space penetrates through the first end, the battery pack is allowed to be mounted to the shell along the first direction and is kept at a first end position, and the battery pack mounting mechanism is configured to enable the battery pack to protrude out of the first end in the second direction by a dimension d1; the sliding space also penetrates through the second end, the battery pack is allowed to be mounted to the shell along a second direction and kept at a second end position, and the battery pack mounting mechanism is configured to enable the battery pack to protrude out of the first end along the second direction by a dimension d2; wherein d1 is greater than d2, the second direction being opposite the first direction.
Further, the shell is provided with a first locking part and a second locking part; the first latching portion is configured to restrict a battery pack mounted in the first direction to the first end position, and the second latching portion is configured to restrict a battery pack mounted in the second direction to the second end position.
In another aspect, the present application further provides a power tool comprising a tool body and a battery pack, the tool body comprising a battery pack mounting mechanism as described above, the battery pack being configured to be mounted to the housing in the first or second direction to power the tool body.
Further, the sliding space comprises a docking space and a guide groove communicated with the docking space, and the guide groove is parallel to the first direction; the tool body comprises a first terminal group and a second terminal group, the first terminal group and the second terminal group are exposed in the butt joint space and are arranged in a central symmetry mode relative to the center of the butt joint space, the battery pack is electrically connected with the first terminal group when being mounted on the shell along the first direction, and the battery pack is electrically connected with the second terminal group when being mounted on the shell along the second direction; the first terminal group comprises a first positive terminal and a first negative terminal, the second terminal group comprises a second positive terminal and a second negative terminal, the first positive terminal is electrically connected with the second positive terminal, and the first negative terminal is electrically connected with the second negative terminal.
Further, the battery pack comprises a third terminal group and a cavity, and the third terminal group and the cavity are arranged along the installation direction of the battery pack; the third terminal set interfaces with the first terminal set when the battery pack is mounted to the housing along the first direction, the second terminal set being located within the cavity; when the battery pack is mounted on the shell along the second direction, the third terminal group is in butt joint with the second terminal group, and the first terminal group is located in the cavity.
Further, the shell is provided with a first groove group and a second groove group which are formed by sinking from the butt joint space, the orthographic projection of the first terminal group on the shell is positioned in the first groove group, and the orthographic projection of the second terminal group on the shell is positioned in the second groove group; when the battery pack is mounted to the housing in the first direction, the battery pack pushes the second terminal group into the second groove group; when the battery pack is mounted to the housing in the second direction, the battery pack pushes the first terminal group into the first groove group.
Further, the battery pack mounting mechanism comprises a first baffle and a second baffle, the battery comprises a first end face and a second end face which are arranged along the mounting direction of the battery pack, the first baffle is movably mounted at the first end of the shell, and the second baffle is movably mounted at the second end of the shell; when the battery pack is provided with the shell along the first direction, the first baffle is pressed by the battery pack and is positioned between the battery pack and the shell, and the second baffle covers the second end face of the battery pack; when the battery pack is mounted on the shell along the second direction, the second baffle is pressed by the battery pack and is positioned between the battery pack and the shell, and the first baffle covers the second end face of the battery pack.
Further, the first baffle is rotatably mounted at a first end of the housing, and the second baffle is rotatably mounted at a second end of the housing; the battery pack mounting mechanism further comprises a first reset element and a second reset element, wherein the first reset element is configured to drive the first baffle plate to return to an initial position from a position pressed by the battery pack, and the second reset element is configured to drive the second baffle plate to return to the initial position from the position pressed by the battery pack.
Further, when the battery pack is mounted to the housing in a first direction, a center of gravity of the battery pack is located at a first position; when the battery pack is mounted to the housing in a second direction, the center of gravity of the battery pack is located at a second position; the distance between the second position and the first position is not less than 10mm.
Further, the tool main body comprises a motor and an output shaft driven by the motor, and the output shaft extends along the up-down direction; when the battery pack is assembled to the housing from a first direction, the battery pack is higher than a lower end face of the tool body; when the battery pack is assembled to the housing from the second direction, the battery pack is lower than the upper end face of the tool body.
In the application, the battery pack can be inserted in a bidirectional manner, so that the outer contour of the battery pack and even the outer contour of the electric tool can be properly adjusted, the influence on the operation of a user caused by interference of the battery pack and the surrounding environment in a narrow space is avoided, and the electric tool can be suitable for the narrow space; in addition, the bidirectional plug-in connection is also beneficial to simplifying the installation process of the battery pack and improving the user experience.
Drawings
Fig. 1 is a schematic view of a conventional power tool in a narrow space.
Fig. 2 is a schematic perspective view of one embodiment of the power tool of the present application.
Fig. 3 is a perspective view of a battery pack mounting mechanism of the power tool shown in fig. 2.
Fig. 4 is a perspective view of a battery pack of the power tool shown in fig. 2.
Fig. 5 is a front schematic view of the power tool of fig. 2 with the battery pack mounted in a first orientation.
Fig. 6 is a front schematic view of the power tool shown in fig. 2, with the battery pack mounted in a second orientation.
Fig. 7 is a front schematic view of a battery pack mounting mechanism according to another embodiment of the present application.
Fig. 8 and 9 are front schematic views of a power tool according to another embodiment of the present application, in which battery packs are mounted in opposite directions, respectively.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.
The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
The battery pack mounting mechanism comprises a shell and a sliding space formed by the shell, wherein the sliding space extends along a first direction, and the shell is provided with a first end and a second end which are arranged along the first direction; the sliding space penetrates through the first end, the battery pack is allowed to be mounted to the shell along the first direction and is kept at a first end position, and the battery pack mounting mechanism is configured to enable the battery pack to protrude out of the first end in the second direction by a dimension d1; the sliding space also penetrates the second end and is kept at a second end position, the battery pack is allowed to be mounted to the shell along a second direction, and the battery pack mounting mechanism is configured to enable the battery pack to protrude out of the first end along the second direction by a dimension d2; wherein d1 is greater than d2, the second direction being opposite the first direction.
Referring to fig. 2, the electric tool of the present embodiment is, for example, an angle grinder, and includes a tool body 1 and a battery pack 2 mounted to the tool body 1, wherein the battery pack 2 is used for supplying power to the tool body 1 to drive the working head 3 to work. The tool body 1 comprises a housing 11, a motor (not shown) arranged in the housing 11, a transmission mechanism 12 connected with a motor shaft and an output shaft 13 connected with the transmission mechanism 12, wherein the transmission mechanism 12 is used for transmitting power of the motor to the output shaft 13 so as to drive a working head 3 arranged on the output shaft 13 to work.
Referring back to fig. 3 to 5, the rear end portion of the housing 11 serves as a case 41 of the battery pack mounting mechanism 4, and the portion of the housing connected to the case forms a grip portion 110 for a user to grasp. The housing 41 encloses a sliding space 40, the sliding space 40 extending in a first direction x+. The sliding space 40 penetrates the first end 411 and the second end 412 of the housing 41, and the first end 411 and the second end 412 are aligned along the first direction x+ so as to allow the battery pack 2 to be mounted along the first direction x+ and the second direction X-, respectively, as will be readily appreciated, the first direction x+ and the second direction X-, respectively. Specifically, the sliding space 40 includes a docking space 401 and a chute 402 that communicates with the docking space 401. The battery pack mounting mechanism 4 further includes a first terminal set 42 and a second terminal set 43, where the first terminal set 42 and the second terminal set 43 are exposed in the docking space for docking with the battery pack 2. In order to ensure that the battery pack can be electrically connected in both directions, the first terminal set 42 and the second terminal set 43 are symmetrical with respect to the geometric center of the docking space 401. It should be noted that the central symmetry herein merely indicates that the positions of the first terminal group 42 and the second terminal group 43 are central symmetry, and it is not necessary that both shapes and sizes are completely identical.
When the battery pack 2 is assembled to the case 41 in the first direction x+, the battery pack 2 protrudes the first end 411 by a dimension d1 (fig. 4) in the second direction X-; when the battery pack 2 is assembled to the case 41 in the second direction X-, the battery pack 2 protrudes in the second direction X-by a dimension d2 (d 2 is 0 in fig. 5) of the first end 411, wherein d1 is greater than d2. Notably, when the battery pack 2 does not actually protrude the first end 411 in the second direction X-, it is understood that d2 is equal to 0. That is, when the space of the power tool in the second direction X-which can be approximately understood as an obliquely upper region of the power tool is limited, the battery pack can be selectively mounted from the second direction X-so that the user can normally operate as shown in fig. 4. The battery pack may be installed from the first direction x+ when space of the power tool in the first direction x+ (which may be understood approximately as an obliquely lower area of the power tool) is limited. In fact, since the non-mounting end 22 of the battery pack is large in size, the non-mounting end 22 protrudes to some extent from the end of the case 41 no matter what direction the battery pack is mounted, and the present application also solves the problem of insufficient space based on adjusting the position of the non-mounting end 22.
Preferably, the output shaft 13 extends in the up-down direction (when the grip mode is changed, the up-down direction is also changed). Preferably, when the battery pack 2 is assembled to the housing 41 from the first direction x+, the battery pack 2 is higher than the lower end face of the tool body 1; when the battery pack 2 is assembled to the housing 41 from the second direction X-, the battery pack 2 is lower than the upper end face of the tool body 1. By changing the mounting direction of the battery pack 2, the power tool can be adapted to different narrow spaces, such as the scenes simulated in fig. 4 and 5.
Referring to fig. 3 and 6, in order to limit the battery pack to the corresponding end position, the battery pack mounting mechanism further includes a first locking portion 441 and a second locking portion 442. The first locking portion 441 is configured to restrict the battery pack 2 mounted in the first direction x+ to a first end position, and the second locking portion 442 is configured to restrict the battery pack 2 mounted in the second direction X-to a second end position. In this embodiment, the first locking portion 441 and the second locking portion 442 are recess portions formed in the housing, the corresponding position (near the non-mounting end) of the battery pack is provided with the locking portion 27, the first locking portion 441 or the second locking portion 442 is matched with the locking portion 27, so that the locking of the battery pack 2 can be achieved, and the unlocking portion 28 connected with the locking portion 27 can be unlocked by pressing. This structure is assembled with the existing battery pack, so that the battery pack mounting mechanism 4 of the present application can be compatible with the existing battery pack. In other embodiments, the battery pack mounting mechanism may be provided with a separate latch structure.
Referring to fig. 6, the battery pack 2 further includes a third terminal group 23 and a cavity 24, and the third terminal group 23 and the cavity 24 are arranged along the mounting direction of the battery pack 2. When the battery pack 2 is assembled to the housing 41 along the first direction x+, the third terminal group 23 is abutted with the first terminal group 42, and the second terminal group 43 is accommodated in the cavity; when the battery pack 2 is assembled to the housing 41 in the second direction X-, the third terminal group 23 is abutted against the second terminal group 41, and the first terminal group 42 is accommodated in the cavity 24. The first terminal set 42 includes a first positive terminal 421 and a first negative terminal 422, the second terminal set 43 includes a second positive terminal 431 and a second negative terminal 432, the first positive terminal 421 and the second positive terminal 431 are electrically connected (e.g., by a wire), and the first negative terminal 422 and the second negative terminal 432 are electrically connected. Of course, the first terminal set 42 and the second terminal set 43 may further include a first detection terminal 423 and a second detection terminal 433, respectively, where the first detection terminal 423 is electrically connected to the second detection terminal 433.
Referring to fig. 7, in another embodiment, the battery pack may not have a cavity, the housing 41 includes a first groove set 415 and a second groove set 416, the front projection of the first terminal set 42 on the housing 41 is located in the first groove set 415, and the front projection of the second terminal set 43 on the housing 41 is located in the second groove set 416. In practice, each first groove of the first groove set 415 corresponds to each first terminal of the first terminal set 42, and each second groove of the second groove set 416 corresponds to each second terminal of the second terminal set 43. When the battery pack 2 is mounted to the housing 41 in the first direction x+, the battery pack 2 pushes the second terminal group 43 into the second groove group 416; when the battery pack 2 is mounted to the housing 41 in the second direction X-, the battery pack 2 pushes the first terminal group 42 into the first groove group 415, so that it can be compatible with existing battery packs. Alternatively, the first terminal group 42 and the second terminal group 43 may be designed to have elasticity, or terminal blocks (insulators for carrying and holding terminals) of the first terminal group 42 and the second terminal group 43 may also be designed to be a floating structure.
Referring to fig. 3, the battery pack mounting mechanism 4 further includes a first baffle 45 and a second baffle 46 (not shown in fig. 2), the battery pack 2 further includes a first end surface 221 (formed at the non-mounting end 22) and a second end surface 211 (formed at the mounting end 21) aligned along the mounting direction, the first baffle 45 is movably mounted at a first end 411 of the housing 41, and the second baffle 46 is movably mounted at a second end 412 of the housing 41. When the battery pack 2 is mounted to the housing 41 in the first direction x+, the first baffle 45 is pressed against the battery pack 2 and is located between the battery pack 2 and the housing 41, and the second baffle 46 covers the second end surface 211 of the battery pack 2; when the battery pack 2 is mounted to the housing in the second direction X-, the second baffle 46 is pressed against the battery pack 2 and is located between the battery pack 2 and the housing 41, and the first baffle 45 covers the second end surface 211 of the battery pack. The first baffle 45 and the second baffle 46 can cover the end face of the battery pack, the integrity and the aesthetic property of the electric tool are improved, and in addition, the first baffle 45 and the second baffle 46 have certain waterproof function. The power display structure of the battery pack may be disposed at the non-mounting end.
Preferably, the first baffle 45 is rotatably mounted to the first end 411 of the housing 41, and the second baffle 46 is rotatably mounted to the second end 412 of the housing 41 (e.g., via a rotation shaft 451 as shown). The battery pack mounting mechanism 4 further includes a first reset element (not shown) configured to drive the first shutter 45 from a position pressed by the battery pack 2 back to the initial position, and a second reset element (not shown) configured to drive the second shutter 46 from a position pressed by the battery pack 2 back to the initial position. The first reset element and the second reset element can be torsion springs, the spiral parts of the torsion springs are sleeved on the torsion springs, and the two arms of the torsion springs are respectively abutted against the first baffle 45 (or the second baffle 46) and the shell 41.
Preferably, when the battery pack 2 is mounted to the housing 41 in the first direction x+, the center of gravity G of the battery pack 2 is located at the first position as shown in fig. 4; when the battery pack 2 is mounted to the housing 41 in the second direction X-, the center of gravity of the battery pack 2 is located at the second position as shown in fig. 5; the distance L between the second position and the first position is not less than 10mm (assuming that the position of the tool body 1 does not change), and the line connecting the second position and the first position is inclined with respect to the output shaft 13. Based on the change of the gravity center of the battery pack, the whole gravity center of the electric tool can be finely adjusted in the up-down direction and the front-back direction (the battery pack occupies about 1/4 of the weight of the angle grinder and occupies larger area, so that fine adjustment of the gravity center of the whole electric tool can be realized), when a user holds the electric tool in different holding modes (such as grinding when the palm is held horizontally and cutting when the palm is held vertically), the user is allowed to finely adjust the gravity center position of the electric tool, and the electric tool is close to the palm of the user as much as possible, so that good holding comfort is obtained, and user experience is improved.
In other embodiments, the power tool may be another tool such as an electric drill, for example, as shown in fig. 8 and 9. The battery pack 2A can be mounted to the tool body 1A from two opposite directions to achieve adjustment of parameters such as the outer contour, the center of gravity, and the like of the electric tool, while also facilitating user assembly.
In the application, the battery pack can be inserted in a bidirectional manner, so that the outer contour of the battery pack and even the outer contour of the electric tool can be properly adjusted, the influence on the operation of a user caused by interference of the battery pack and the surrounding environment in a narrow space is avoided, and the electric tool can be suitable for the narrow space; in addition, the bidirectional plug-in connection is beneficial to simplifying the installation process of the battery pack and improving the user experience; while at the same time. Based on the change of the gravity center of the battery pack, the integral gravity center of the electric tool can be finely adjusted in the up-down direction and the front-back direction, so that good holding comfort is obtained, and user experience is further improved.
The foregoing description is only a preferred embodiment of the present application, and is not intended to limit the invention to the particular embodiment disclosed, but is not intended to limit the invention to the particular embodiment disclosed, as the equivalent of some alterations or modifications can be made without departing from the scope of the present application.

Claims (7)

1. An electric tool comprising a tool body and a battery pack, the tool body comprising a battery pack mounting mechanism, characterized in that the battery pack mounting mechanism comprises a housing and a sliding space formed by the housing, the sliding space extending along a first direction, the housing having a first end and a second end aligned along the first direction;
the sliding space penetrates through the first end, the battery pack is allowed to be mounted to the shell along the first direction and is kept at a first end position, and the battery pack mounting mechanism is configured to enable the battery pack to protrude out of the first end in the second direction by a dimension d1;
the sliding space also penetrates through the second end, the battery pack is allowed to be mounted to the shell along a second direction and kept at a second end position, and the battery pack mounting mechanism is configured to enable the battery pack to protrude out of the first end along the second direction by a dimension d2;
wherein d1 is greater than d2, the second direction being opposite the first direction;
the sliding space comprises a butt joint space and a guide groove communicated with the butt joint space, and the guide groove is parallel to the first direction;
the tool body comprises a first terminal group and a second terminal group, the first terminal group and the second terminal group are exposed in the butt joint space and are arranged in a central symmetry mode relative to the center of the butt joint space, the battery pack is electrically connected with the first terminal group when being mounted on the shell along the first direction, and the battery pack is electrically connected with the second terminal group when being mounted on the shell along the second direction;
the first terminal group comprises a first positive terminal and a first negative terminal, the second terminal group comprises a second positive terminal and a second negative terminal, the first positive terminal is electrically connected with the second positive terminal, and the first negative terminal is electrically connected with the second negative terminal;
the battery pack is configured to be mounted to the housing in the first direction or the second direction to supply power to the tool body;
the shell is provided with a first groove group and a second groove group which are formed by sinking from the butt joint space, the orthographic projection of the first terminal group on the shell is positioned in the first groove group, and the orthographic projection of the second terminal group on the shell is positioned in the second groove group;
when the battery pack is mounted to the housing in the first direction, the battery pack pushes the second terminal group into the second groove group; when the battery pack is mounted to the shell along the second direction, the battery pack pushes the first terminal group into the first groove group;
the first terminal set and the second terminal set comprise terminal bases for bearing and holding terminals, and the terminal bases are of a floating structure.
2. The power tool according to claim 1, wherein the housing is provided with a first locking portion and a second locking portion;
the first latching portion is configured to restrict a battery pack mounted in the first direction to the first end position, and the second latching portion is configured to restrict a battery pack mounted in the second direction to the second end position.
3. The power tool according to claim 1, wherein the battery pack includes a third terminal group and a cavity, the third terminal group and the cavity being arranged along a mounting direction of the battery pack;
the third terminal set interfaces with the first terminal set when the battery pack is mounted to the housing along the first direction, the second terminal set being located within the cavity; when the battery pack is mounted on the shell along the second direction, the third terminal group is in butt joint with the second terminal group, and the first terminal group is located in the cavity.
4. The power tool according to claim 1, wherein the battery pack mounting mechanism includes a first baffle plate and a second baffle plate, the battery pack includes a first end surface and a second end surface aligned in a mounting direction thereof, the first baffle plate is movably mounted to the first end of the housing, and the second baffle plate is movably mounted to the second end of the housing;
when the battery pack is mounted to the housing in the first direction, the first baffle is pressed against and between the battery pack and the housing by the battery pack, and the second baffle covers the second end face of the battery pack; when the battery pack is mounted to the housing in the second direction, the second baffle is pressed against by the battery pack and is located between the battery pack and the housing, and the first baffle covers the second end face of the battery pack.
5. The power tool of claim 4, wherein the first shutter is rotatably mounted to a first end of the housing and the second shutter is rotatably mounted to a second end of the housing;
the battery pack mounting mechanism further comprises a first reset element and a second reset element, wherein the first reset element is configured to drive the first baffle plate to return to an initial position from a position pressed by the battery pack, and the second reset element is configured to drive the second baffle plate to return to the initial position from the position pressed by the battery pack.
6. The power tool of claim 1, wherein a center of gravity of the battery pack is located at a first position when the battery pack is mounted to the housing in the first direction;
when the battery pack is mounted to the housing in the second direction, the center of gravity of the battery pack is located at a second position;
the distance between the second position and the first position is not less than 10mm.
7. The power tool according to claim 1, wherein the tool main body includes a motor and an output shaft driven by the motor, the output shaft extending in an up-down direction;
when the battery pack is assembled to the housing from a first direction, the battery pack is higher than a lower end face of the tool body;
when the battery pack is assembled to the housing from the second direction, the battery pack is lower than the upper end face of the tool body.
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