Stably-connected battery pack and electric tool

Abstract

The utility model relates to the field of electric tools, and discloses a stable connection battery pack and an electric tool, the stable connection battery pack comprises a machine shell, the battery pack is detachably connected to the bottom of the machine shell, the battery pack comprises a shell, a guide interface arranged on the shell and a clamping piece assembly located in the guide interface, and the clamping piece assembly comprises at least one clamping piece set; each clamping piece group comprises two elastic clamping pieces which are distributed in a clamping state, the switching module is convexly provided with a switching insertion piece which can be inserted between the two elastic clamping pieces through a guide interface, and the clamping piece assembly is accommodated in a clamping piece mounting seat and is synchronously and fixedly connected with a battery combination in the shell together with the clamping piece mounting seat; the clamping piece installation base is provided with a plurality of installation grooves capable of independently installing one clamping piece set, elastic pieces used for driving the two elastic clamping pieces to be close to each other are arranged between the opposite sides of the two elastic clamping pieces in one clamping piece set and the groove walls of the installation grooves, and in the electric tool, connection of internal components of the battery pack and connection of the battery pack and the switching module are more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electric tools, especially to a battery pack and electric tool with stable connection. BACKGROUND

[0002] The battery pack is the power source of the wireless electric tool and is an important component of the wireless electric tool. The composition structure of the battery pack can refer to the electric tool and its battery pack disclosed in the Chinese patent application with the application number 201410844532.3. The battery pack includes a shell, an electric cell combination, and two or more connection terminals for transmitting electric energy or / and signals. The electric tool has a structure that is adapted to the battery pack.

[0003] The existing battery pack needs to be connected with the adapter module, and the adapter module is connected with the switch control module. Generally, the battery pack is partially inserted into the shell and locked with the shell. The connection terminals of the battery pack are inserted and matched with the adapter module to achieve connection. In the conventional design, two elastic clamping pieces are arranged inside the connection terminals. The adapter module protrudes an adapter tab that can be inserted between the two elastic clamping pieces. The clamping force is generated only by the deformation of the elastic clamping pieces themselves, and the clamping force is small. When the electric tool is impacted by external force, the adapter module is easily separated from the elastic clamping pieces. SUMMARY

[0004] In view of the defect that the existing battery pack and adapter module are easily separated when impacted by external force, the first object of the utility model is to provide a battery pack with more stable connection.

[0005] To solve the above technical problems, the utility model solves the problems through the following technical solutions:

[0006] A battery pack with stable connection includes a shell, a guide interface arranged on the shell, and a clamping piece assembly located inside the guide interface. Each clamping piece assembly includes at least one clamping piece group, each clamping piece group includes two elastic clamping pieces arranged in a clamping state, and the adapter module protrudes an adapter tab that can be inserted between the two elastic clamping pieces. The clamping piece assembly is accommodated in a clamping piece mounting seat and is fixedly connected with the battery combination in the shell synchronously. The clamping piece mounting seat has a plurality of installation grooves that can independently install a clamping piece group. The opposite sides of the two elastic clamping pieces in a clamping piece group are provided with elastic members for driving the two elastic clamping pieces to move closer to each other between the groove walls of the installation grooves.

[0007] With the above-mentioned scheme, the clamping piece assembly, the clamping piece mounting seat, and the battery combination are integrated, and are not easy to move relatively, so the connection is more stable. The elastic members are added to increase the clamping force of the elastic clamping pieces, increase the clamping firmness between the elastic clamping pieces and the adapter tab, and reduce the probability of separation of the two under the action of external force.

[0008] Preferably, the elastic member is a rubber column, and a first positioning groove for positioning the rubber column is formed between the mounting groove and the elastic clamping piece.

[0009] Preferably, the clamping end of the adjacent elastic clamping piece in each group of clamping pieces is a concave arc that is first relatively close and then relatively open towards the clamping end thereof, and the groove wall of the mounting groove is provided with an arc groove opposite to the concave arc, and the first positioning groove for positioning the rubber column is formed by the combination of the concave arc and the arc groove.

[0010] By the above scheme, the arc groove of the groove wall and the shape of the elastic clamping piece itself form the first positioning groove for positioning the rubber column, and the elastic interference fit between the rubber column and the first positioning groove increases the clamping force of the elastic clamping piece.

[0011] Preferably, the battery combination comprises two brackets arranged in parallel and a combination of battery cells arranged horizontally and fixed at both ends to the two brackets, the upper ends of the two brackets are synchronously fixed with a control panel electrically connected to the combination of battery cells, the clamping piece mounting seat is fixed on the control panel, and the lower end of the elastic clamping piece extends with a clamping piece welding foot inserted and welded with the control panel.

[0012] By the above scheme, the battery combination is fixedly connected with the control panel, the control panel is fixedly connected with the clamping piece mounting seat, and the elastic clamping piece is positioned and mounted in the mounting groove of the clamping piece mounting seat and is fixedly welded with the control panel, so that these components are integrated, the components are not easy to be separated, and the connection is more stable.

[0013] Preferably, the bracket is concave with a fourth positioning groove for horizontally positioning and inserting the control panel, and the control panel and the bracket are locked by a screw.

[0014] By the above scheme, the control panel and the bracket are positioned and then locked, so that the connection between the control panel and the bracket is more firm and stable.

[0015] Preferably, a buffer assembly for increasing the anti-shock performance of the battery combination is arranged between the bracket and the inner wall of the shell.

[0016] Preferably, the buffer assembly comprises a buffer gasket A located on one side away from the two brackets and a buffer gasket B simultaneously covering the two ends and the lower end of the bracket.

[0017] By the above scheme, the buffer gasket A and the buffer gasket B are combined to significantly increase the anti-collision performance of the battery pack and avoid damage to the internal components of the battery pack under external force or during falling.

[0018] The second object of the utility model is to provide an electric tool, which comprises a shell, the bottom of the shell is detachably assembled with the battery pack, the battery pack and the shell are guided and inserted and matched through a guide structure, and the two are detachably connected through a locking structure.

[0019] Preferably, the guide structure includes a slot opened at the bottom of the shell for partial horizontal insertion of the battery pack, guide grooves opened on both side walls of the slot along the insertion direction of the battery pack, and guide ribs protruding on both sides of the battery pack shell that can be inserted and guided along the guide grooves.

[0020] Preferably, the locking structure includes symmetrically recessed slots on both sides of the slot, and a card block that is elastically retractable on both sides of the shell and can be partially inserted into or out of the slot. The contraction of the card block is controlled by a button. The card block is integrally connected to the button and the button is located outside the shell. Slots are provided on both sides of the shell for the card block and the button to be retracted. A limit member is fixed in the shell, and a spring is provided between the button and the limit member to drive the button and the card block to be in an extended state.

[0021] With the above solution, the battery pack and the power tool casing are guided and plugged in, and can be quickly installed or removed using the locking structure. Locking or unlocking requires pressing two buttons on both sides at the same time, which makes disassembly and assembly convenient and avoids mis-locking.

[0022] The utility model has significant technical effects due to the adoption of the above technical solutions:

[0023] 1. The clip assembly is positioned and installed in the clip mounting seat, and an elastic member is provided between the clip mounting seat and the elastic clip to increase the clamping force of the two elastic clips. This is used to reduce the probability of separation between the adapter plug of the adapter module and the battery pack when impacted by external forces, making the connection more stable.

[0024] 2. The clip assembly is welded to the control board, the clip mounting base is fixed to the control board, and the control board is fixed to the battery assembly. These components are connected as one, will not shift with each other, and the connection is more stable;

[0025] 3. A buffer component is provided between the battery assembly and the shell to increase the anti-collision performance of the battery pack and reduce the probability of damage to internal components when the battery pack is hit or falls. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is an exploded view of the battery pack and adapter module of this embodiment;

[0027] Figure 2 is an exploded view of the battery pack and housing of this embodiment;

[0028] Figure 3 is an exploded view of the battery pack of this embodiment;

[0029] Figure 4 is an exploded view of the battery assembly of this embodiment;

[0030] Figure 5 1 is an exploded view of the locking structure and the housing of this embodiment.

[0031] The part names referred to by the numbers in the above drawings are as follows: 1, housing; 101, upper shell; 1011, guide rib; 1012, guide interface; 1013, slot; 102, lower shell; 2, button; 3, clamping block; 4, casing; 401, guide groove; 402, clamping groove; 5, adapter module; 6, adapter tab; 7, control board; 701, second positioning groove; 702, third positioning groove; 8, battery combination; 9, bracket; 901, fourth positioning groove; 10, buffer gasket A; 11, buffer gasket B; 12, clamping piece mounting seat; 121, mounting groove; 122, arc groove; 123, positioning protrusion; 13, elastic clamping piece; 131, clamping piece welding leg; 132, concave arc; 14, rubber column; 15, limiting piece; 16, spring. DETAILED DESCRIPTION

[0032] The utility model will be described in further detail below in combination with the drawings and embodiments.

[0033] An electric tool, in combination Figures 1-5 As shown, it comprises a casing 4 and a stably connected battery pack, the battery pack is detachably locked at the bottom of the casing 4, the battery pack comprises a housing 1 and a battery combination accommodated in the housing 1, the housing 1 comprises an upper shell 101 and a lower shell 102 locked by screws from top to bottom, a slot is formed at the bottom of the casing 4, which can partially horizontally insert the upper shell 101, guide ribs 1011 are protruded on both sides of the upper shell 101 along the insertion direction, guide grooves 401 are formed on both sides of the slot, clamping blocks 3 are elastically arranged at the ends of the guide ribs 1011 away from the insertion direction, the contraction of the clamping blocks 3 is controlled by buttons 2 integrally arranged with the clamping blocks 3 and located outside the casing 4, clamping grooves 402 are formed on both sides of the slot, which can elastically clamp the clamping blocks 3, a limiting piece 15 is fixed in the upper shell 101 by screws, slots 1013 are formed on both sides of the upper shell 101, which can respectively pass out the clamping blocks 3 and the buttons 2 from the inside of the upper shell 101, a spring 16 is arranged between the button 2 and the limiting piece 15, both ends of the spring 16 are fixedly connected with the button 2 and the limiting piece 15, and the spring 16 is used to drive the button 2 and the clamping blocks 3 to be in the state of extending out of the slots 1013.

[0034] Specifically refer to Figures 3-5As shown, the insertion end of the upper shell 101 is provided with a guide interface 1012 for guiding the insertion of the adapter plug 6 on the adapter module 5 inside the shell 4, the battery assembly is positioned and installed in the lower shell 102, and the upper end surface of the battery assembly is fixed with a control panel 7, the upper end surface of the control panel 7 is fixed with a clamping piece mounting seat 12 located in the upper shell 101 and used for accommodating the clamping piece assembly cooperating with the adapter plug 6, the clamping piece assembly includes at least one clamping piece group, and each clamping piece group includes two elastic clamping pieces 13 distributed in a clamping state, a second positioning groove 701 is arranged on the control panel 7, the lower end of the elastic clamping piece 13 extends with a clamping piece welding foot 131 which is inserted into the second positioning groove 701 and then welded, the clamping piece mounting seat 12 includes a plurality of installation grooves 121 horizontally spaced and capable of independently installing a clamping piece group, one end of the installation groove 121 towards the guide interface 1012 is arranged as a through groove in communication with the guide interface 1012, the opposite sides of the two elastic clamping pieces 13 in a clamping piece group are provided with elastic members between the groove walls of the installation groove 121 for driving the two elastic clamping pieces 13 to approach each other, the elastic member is a rubber column 14, and a first positioning groove is formed between the installation groove 121 and the elastic clamping piece 13 for positioning the rubber column 14.

[0035] The first positioning groove is composed of the elastic clamping piece 13 and the groove wall of the installation groove 121, and the specific structure is that the clamping end of the adjacent elastic clamping piece 13 in each clamping piece group presents a concave arc 132 which is first relatively close and then relatively open towards the clamping end, the groove wall of the installation groove 121 is provided with an arc groove 122 opposite to the concave arc 132, the concave arc 132 and the arc groove 122 form the first positioning groove after combination, and the rubber column 14 is inserted into the first positioning groove in interference fit.

[0036] For details Figure 4 As shown, the battery assembly includes two brackets 9 arranged in parallel and a battery cell combination 8 arranged horizontally in sequence and fixed at both ends of the two brackets 9, the upper end surface of the two brackets 9 is fixed with the control panel 7, and the specific connection mode is that the fourth positioning groove 901 is recessed symmetrically at both ends of the upper end surface of the two brackets 9, the control panel 7 is horizontally embedded in the fourth positioning groove 901, a through hole is arranged on the control panel 7, and a threaded hole is arranged on the bracket 9, and a screw is tightly fitted with the corresponding threaded hole after passing through the through hole. The fixing mode of the clamping piece mounting seat 12 and the control panel 7 is that the positioning protrusions 123 are protruded at the lower end of the four corners of the clamping piece mounting seat 12, and the third positioning groove 702 is opened on the control panel 7 for interference clamping of the positioning protrusions 123.

[0037] For details Figures 3-4 As shown, a buffer assembly for increasing the anti-shock performance of the battery combination is arranged between the bracket 9 and the inner wall of the shell 1, the buffer assembly includes a buffer gasket A10 located on the side opposite to the two brackets 9 and a buffer gasket B11 simultaneously covering the two ends and the lower end of the bracket 9.

[0038] In the scheme, the clip group is positioned and installed in the clip mounting seat 12, and a rubber column 14 for increasing the clamping force of the two elastic clips 13 is arranged between the clip mounting seat 12 and the elastic clip 13, so as to reduce the probability that the adapter plug 6 of the adapter module 5 is separated from the battery pack when the battery pack is impacted by external force, and the connection is more stable; the elastic clip 13 is welded on the control panel 7 and positioned and installed in the clip mounting seat 12, the clip mounting seat 12 is fixed on the control panel 7, the control panel 7 is fixed on the battery combination, and these components are integrated and cannot be displaced relative to each other, so that the connection is more stable; the buffer assembly is arranged between the battery combination and the shell 1, the crashworthiness of the battery pack can be increased, and the probability that the internal components are damaged when the battery pack is impacted or falls is reduced, through the above structure, the stability of the connection between the internal components of the battery pack and the stability of the connection between the battery pack and the internal adapter module 5 of the electric tool can be significantly increased.

[0039] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled persons in the technical field, some improvements and decorations without departing from the principles of the present application are also considered to be within the protection scope of the present application.

Claims

1. A battery pack with stable connection, comprising a shell (1), a guide interface (1012) arranged on the shell (1), and a clamping piece assembly located inside the guide interface (1012), the clamping piece assembly comprising at least one clamping piece group, each clamping piece group comprising two elastic clamping pieces (13) arranged in a clamping state, and a transition module (5) having a transition tab (6) protruding therefrom, the transition tab (6) being capable of being inserted into the space between the two elastic clamping pieces (13) of the guide interface (1012), characterized in that: The clamping piece assembly is accommodated in a clamping piece mounting base (12) and is fixedly connected with the battery combination in the shell (1) synchronously, the clamping piece mounting base (12) is provided with a plurality of mounting grooves (121) capable of independently mounting a set of clamping piece groups, and the opposite sides of the two elastic clamping pieces (13) in a set of clamping piece groups are provided between the groove walls of the mounting grooves (121) and the elastic members for driving the two elastic clamping pieces (13) to approach each other.

2. The battery pack of claim 1, wherein: The elastic member is a rubber column (14), and the mounting groove (121) and the elastic clamping piece (13) form a first positioning groove for positioning the rubber column (14).

3. The battery pack of claim 2, wherein: The clamping ends of the adjacent elastic clamping pieces (13) in each set of clamping piece groups are concave arcs (132) that are relatively close to each other first and then relatively open to the clamping ends thereof, the groove walls of the mounting grooves (121) are provided with arc grooves (122) opposite to the concave arcs (132), and the concave arcs (132) and the arc grooves (122) form the first positioning groove into which the rubber column (14) is elastically inserted in interference.

4. The battery pack of claim 3, wherein: The battery combination comprises two brackets (9) arranged in parallel and a cell combination (8) arranged horizontally and fixed at both ends of the two brackets (9), the upper ends of the two brackets (9) are fixedly connected with a control panel (7) electrically connected with the cell combination (8), the clamping piece mounting base (12) is fixed on the control panel (7), and the lower ends of the elastic clamping pieces (13) extend clamping piece welding feet (131) inserted and welded with the control panel (7).

5. The battery pack of claim 4, wherein: The bracket (9) is recessed with a fourth positioning groove (901) capable of horizontally positioning and inserting the control panel (7), and the control panel (7) and the bracket (9) are locked by screws.

6. The battery pack of claim 4, wherein: A buffer assembly for increasing the anti-shock performance of the battery combination is arranged between the bracket (9) and the inner wall of the shell (1).

7. The battery pack of claim 6, wherein: The buffer assembly comprises a buffer gasket A (10) located on the opposite side of the two brackets (9) and a buffer gasket B (11) simultaneously covering the two ends and the lower end of the bracket (9).

8. A power tool comprising a housing (4), characterized in that: The bottom of the casing (4) is detachably assembled with the battery pack as claimed in any one of claims 1-7, the battery pack and the casing (4) are guided and inserted in fit through the guiding structure, and the two are detachably connected through the locking structure.

9. The power tool of claim 8, wherein: The guiding structure comprises a slot formed in the bottom of the shell (1) and capable of locally horizontally inserting the battery pack, guide grooves (401) formed in the two side walls of the slot along the insertion direction of the battery pack, and guide ribs (1011) protruding from the two sides of the shell (1) of the battery pack and capable of being inserted and guided and moved along the guide grooves (401).

10. The power tool of claim 9, wherein: The locking structure comprises symmetrical clamping grooves (402) recessed on the two sides of the slot, clamping blocks (3) elastically extended on the two sides of the shell (1) and capable of being locally clamped into or separated from the clamping grooves (402), the contraction of the clamping blocks (3) is controlled by a button (2), the clamping blocks (3) and the button (2) are integrally connected, the button (2) is located outside the casing (4), the shell (1) is provided with a slot (1013) capable of elastically extending the clamping blocks (3) and the button (2), a limiting member (15) is fixed in the shell (1), and a spring (16) is arranged between the button (2) and the limiting member (15) to drive the button (2) and the clamping blocks (3) to be in the extended state.

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