Battery pack and electric tool

Abstract

The invention relates to a battery pack and an electric tool. According to the technical scheme, the battery pack comprises a shell; the support is connected to the interior of the shell; at least part of the battery cell is supported by the bracket; the locking piece comprises an operating part and a locking part; the stop piece has a locking state and an unlocking state, and when the stop piece is in the locking state, the stop piece limits the movement of the locking part; when the stop piece is in an unlocking state, the locking part freely moves; and the first unlocking mechanism is used for switching the stop piece from the locking state to the unlocking state, so that the effect of improving the connection stability of the battery pack is realized.

Description

Technical Field

[0001] The present application relates to the field of tool technology, and in particular to a battery pack and an electric tool. Background Art

[0002] With the increasing development of power tools, lithium-ion cordless power tools are increasingly favored by consumers due to their portability and convenience.

[0003] In the related art, a Chinese patent with publication number CN1154555C discloses a battery-powered hand-guided electric tool, particularly a hammer, wherein a rechargeable battery box is detachably connected to the housing of the hammer through a rail groove structure, and the battery box is locked in an operating position on the housing by means of a locking device provided on the tool housing, and can be moved to a release position. In the operating position, the electrical contacts of the battery box are electrically connected to the relevant electrical contacts of the electric tool along a contact length extending in the longitudinal direction of the rail groove structure, so that when the locking device is moved to the release position, the battery box can be moved out of the operating position along the longitudinal direction of the rail groove structure and can be removed from the tool housing.

[0004] However, the current battery box connection method is prone to deformation after long-term use, which may cause the battery box to fall off when the power tool vibrates, so there is room for improvement. Summary of the invention

[0005] Based on this, it is necessary to provide a battery pack and an electric tool to address the problem of battery box connection stability.

[0006] In order to solve the above technical problems, this application is implemented as follows: In one embodiment, a battery pack is provided, comprising: case; A bracket connected to the interior of the shell; A battery cell, at least partially supported by the support; A locking member, comprising an operating portion and a locking portion; A stopper having a locked state and an unlocked state, wherein when the stopper is in the locked state, the stopper restricts the movement of the locking portion; and when the stopper is in the unlocked state, the locking portion is free to move; The first unlocking mechanism switches the stopper from the locked state to the unlocked state.

[0007] In one or other preferred embodiments, a second unlocking mechanism is further included, which can switch the stopper from the locked state to the unlocked state; the first unlocking mechanism is located at the operating part, and the first unlocking mechanism is triggered before the operating part.

[0008] In one or other preferred embodiments, the locking portion has a guide surface and a locking surface, the second unlocking mechanism is located on the guide surface, and the second unlocking mechanism is triggered before the guide surface; the first unlocking mechanism switches the stopper from the locked state to the unlocked state through the second unlocking mechanism.

[0009] In one or other preferred embodiments, the first unlocking mechanism includes a transmission member slidably connected in the shell, and the locking portion is provided with a make way groove for the transmission member; when the transmission member is triggered, the stop member switches from the locked state to the unlocked state; a first guide rail portion for limiting the movement of the stop member is provided in the shell; and a second guide rail portion for limiting the movement of the transmission member is provided in the shell.

[0010] In one or other preferred embodiments, the first unlocking mechanism further includes a pressing member and a resetting member, and a guiding portion is provided at the contact point between the pressing member and the transmission member and / or the contact point between the transmission member and the pressing member. When the pressing member is pressed, the resetting member is deformed and has a tendency to reset the pressing member, the transmission member is triggered, and the stop member can be driven by the transmission member; the pressing member is provided on the operating portion.

[0011] In one or other preferred embodiments, the second unlocking mechanism includes an unlocking member pivoted on the locking portion, one end of the unlocking member protrudes from the housing, and the other end of the unlocking member abuts against the stop member.

[0012] In one or other preferred embodiments, the locking portion is provided with an embedding groove for the unlocking member to be embedded in; when the unlocking member drives the stop member to be in an unlocked state, the unlocking member is at least partially embedded in the embedding groove, and / or the surface of the unlocking member is flush with the surface of the guide surface or below the surface of the guide surface; the side surface of the unlocking member facing away from the stop member is against the transmission member, and the force arm of the transmission member is greater than the force arm of the stop member.

[0013] In one or other preferred embodiments, the stop member is slidably connected to the top of the shell, and when the stop member is in the locked state, the stop member is located below the locking portion; the stop member has a trigger portion, and the trigger portion is abutted against the unlocking member; a guide portion is provided on the surface of the trigger portion facing the unlocking member and / or the surface of the transmission member facing the stop member and / or the unlocking member.

[0014] In one or other preferred embodiments, it also includes an elastic member, when the operating part is pressed, the elastic member is deformed and has a tendency to reset the locking part; a biasing member is provided on the side of the stop member away from the locking part, and the biasing member has a tendency to bias the stop member toward the locking part; the shell is provided with an exit hole for the locking part to pass through, and when the stop member is in a locked state, the stop member and the exit hole at least partially overlap in the orthographic projection of the top surface of the shell.

[0015] Based on the same inventive concept, the present application also discloses an electric tool, comprising: A housing having a battery connection portion; The motor is housed in the housing and provides power; a transmission mechanism connected to the motor and having an output shaft, wherein the transmission mechanism receives power from the motor and transmits the power to the output shaft; and The battery pack described in any of the above embodiments is connected to the battery connecting portion to provide energy to the motor.

[0016] In the embodiment of the present application, the locking portion is stopped by a stopper provided in the shell and unlocked by a first unlocking mechanism, thereby effectively preventing the locking member from sinking freely, thereby greatly improving the stability of the battery pack connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a battery pack in one embodiment of the present application; Figure 2 It is a schematic diagram of a cross-sectional structure of a battery pack along the midline in one embodiment of the present application; Figure 3 This is a schematic diagram of the internal structure of part of the housing in one embodiment of the present application; Figure 4 It is a schematic diagram of a bottom view of a part of the internal structure of a housing in one embodiment of the present application; Figure 5 It is a schematic diagram of a top view of a part of the internal structure of a housing in one embodiment of the present application; Figure 6 It is a schematic exploded view of an electric tool in one embodiment of the present application.

[0018] Description of the drawings: 1. Shell; 11. Bracket; 12. Battery cell; 13. Locking member; 131. Operating part; 132. Locking part; 1321. Guide surface; 1322. Locking surface; 1323. Embedding groove; 133. Displacement groove; 14. Elastic member; 15. Through hole; 16. Biasing member; 17. First guide rail part; 18. Second guide rail part; 2. Stop member; 21. Trigger part; 3. First unlocking mechanism; 31. Transmission member; 32. Pressing member; 33. Resetting member; 34. Guide part; 4. Second unlocking mechanism; 41. Unlocking member; 5. Guide part; 6. Shell; 61. Battery connecting part; 611. Locking groove. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0020] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0025] See also Figure 1 and Figure 2 FIG1 shows a schematic diagram of the overall structure of a battery pack in an embodiment of the present application, and FIG2 shows a schematic diagram of a cross-sectional structure of a battery pack along the center line in an embodiment of the present application. An embodiment of the present application provides a battery pack, including a housing 1, a bracket 11, a battery cell 12, a locking member 13, a stopper 2, and a first unlocking mechanism 3, wherein the bracket 11 can be connected to the inside of the housing 1, and the battery cell 12 can be installed on the bracket 11 to be supported by the bracket 11. The locking member 13 includes a locking portion 132 and an operating portion 131, and the bottom of the locking portion 132 and the operating portion 131 can be connected by a connecting plate, and the locking portion 132 and the operating portion 131 can be exposed outside the housing 1. When the operating portion 131 is triggered, the locking portion 132 also moves accordingly.

[0026] The locking portion 132 includes a guide surface 1321 and a locking surface 1322. The locking surface 1322 can be a vertical surface, and the guide surface 1321 can be an inclined surface or an arc surface, as long as it can provide a gap when the battery pack is installed on the power tool. The above-mentioned battery pack also includes an elastic member 14, which can be located at the bottom of the locking portion 132 or at the bottom of the operating portion 131. When the operating portion 131 is pressed, the elastic member 14 is deformed and has a tendency to reset the operating portion 131.

[0027] See also Figure 2 and Figure 3 FIG3 shows a schematic diagram of the internal structure of part of the shell in an embodiment of the present application. The locking member 13 is slidably connected to the shell 1 along the height direction of the shell 1. The shell 1 may be provided with an exit hole 15 for the locking portion 132 to pass through. The stop member 2 may have a locked state and an unlocked state. When the stop member 2 is in the locked state, the movement of the locking portion 132 entering the shell 1 from the exit hole 15 is restricted; when the stop member 2 is in the unlocked state, the locking portion 132 can move freely, and the first unlocking mechanism 3 is used to switch the state of the stop member 2, and the stop member 2 can be switched from the locked state to the unlocked state, so that the locking portion 132 can move freely.

[0028] In one or other preferred embodiments, a biasing member 16 is provided on the side of the stopper 2 away from the locking portion 132. One end of the biasing member 16 can be installed inside the housing 1, and the other end can be installed on the stopper 2. The biasing member 16 can be an elastic element with elasticity such as a spring, a rubber block, a tension spring, or a leaf spring. The biasing member 16 can have a tendency to bias the stopper 2 toward the locking portion 132, that is, the biasing member 16 can convert the stopper 2 from an unlocked state to a locked state.

[0029] See also Figure 3 and Figure 4 FIG4 shows a schematic diagram of a partial shell internal structure in an embodiment of the present application from a bottom view. In one or other preferred embodiments, the stopper 2 can be slidably connected to the inner wall of the shell 1 along the length direction of the shell 1. A first guide rail portion 17 for limiting the movement of the stopper 2 can be provided in the shell 1. The first guide rail portion 17 can be a guide groove for inserting the stopper 2, or a guide block protruding from the inside of the shell 1 into the stopper 2, as long as it can guide the stopper 2. Preferably, the first guide rail portion 17 can be a U-shaped block integrally formed on the inner wall of the shell 1, and the stopper 2 is inserted in the opening of the U-shaped block, so that the stopper 2 can be limited while guiding.

[0030] In one or other preferred embodiments, the stop member 2 enters into the range of the orthographic projection of the through hole 15. In particular, when the stop member 2 is in a locked state, the stop member 2 and the through hole 15 at least partially overlap in the orthographic projection of the top surface of the shell 1, thereby being able to limit the locking portion 132.

[0031] In one or other preferred embodiments, the stopper 2 can be slidably connected to the top of the shell 1. When the stopper 2 is in a locked state, the stopper 2 is located below the locking portion 132, thereby being able to limit the locking portion 132.

[0032] In one or other preferred embodiments, the first unlocking mechanism 3 may include a transmission member 31, and the locking portion 132 is provided with a make way groove 133 for making way for the transmission member 31; when the transmission member 31 is triggered, the stop member 2 can switch from the locked state to the unlocked state, and at this time, the transmission member 31 can extend from the shell 1 to the outside of the shell 1 for triggering.

[0033] See also Figure 4 and Figure 5 FIG5 shows a schematic diagram of a partial housing internal structure in an embodiment of the present application from a top view. A second guide rail portion 18 for limiting transmission movement may also be provided in the housing 1. The second guide rail portion 18 may be a guide groove for inserting the stopper 2, or a guide block protruding from the housing 1 into the transmission member 31, as long as it can guide the stopper 2. Preferably, the second guide rail portion 18 may be a U-shaped block integrally formed on the inner wall of the housing 1, and the transmission member 31 is inserted into the opening of the U-shaped block, so that the stopper 2 can be limited while guiding.

[0034] In one or other preferred embodiments, the first unlocking mechanism 3 further includes a pressing member 32 and a reset member 33, wherein a guide portion 34 may be provided at the contact point between the pressing member 32 and the transmission member 31 and / or between the transmission member 31 and the pressing member 32, and the guide portion 34 may be an inclined surface or an arc surface, as long as the movement of the pressing member 32 can be converted into the movement of the transmission member 31. In the embodiment of the present application, a guide portion 34 is provided at the contact point between the pressing member 32 and the transmission member 31 and between the transmission member 31 and the pressing member 32. The reset member 33 may be an elastic element such as a spring, and the reset member 33 may be provided at the bottom of the pressing member 32. When the pressing member 32 is pressed, the reset member 33 is deformed and has a tendency to reset the pressing member 32. At the same time, the transmission member 31 is driven, and the stop member 2 also moves accordingly.

[0035] Preferably, the pressing member 32 can be disposed on the operating portion 131, that is, the pressing member 32 can be pressed when the operating portion 131 is operated. In particular, the first unlocking mechanism 3 is located on the operating portion 131, and the pressing member 32 is triggered before the operating portion 131, that is, the pressing member 32 protrudes from the operating portion 131, so when the operating portion 131 is pressed, the pressing member 32 will inevitably be triggered first.

[0036] In one or other preferred embodiments, a second unlocking mechanism 4 is also included, and the second unlocking mechanism 4 can also switch the stopper 2 from the locked state to the unlocked state. In particular, the second unlocking mechanism can be located on the guide surface 1321, and the second unlocking mechanism 4 can be triggered before the guide surface 1321.

[0037] In one or other preferred embodiments, the second unlocking mechanism 4 includes an unlocking member 41, which can be pivoted on the locking portion 132, one end of the unlocking member 41 protrudes from the housing 1, and the other end can abut against the stopper 2. When the battery pack is installed on the power tool, the power tool preferentially triggers the unlocking member 41, pushing the stopper 2 from the locked state to the unlocked state, making the battery pack installation process easier.

[0038] In one or other preferred embodiments, the locking portion 132 is provided with an embedding groove 1323, and the embedding groove 1323 can be embedded in the unlocking member 41. When the unlocking member 41 drives the stopper 2 to be in the unlocking state, the unlocking member 41 is at least partially embedded in the embedding groove 1323. In particular, when the unlocking member 41 drives the stopper 2 to be in the unlocking state, the surface of the unlocking member 41 exposed outside the housing 1 is flush with the guide surface 1321 or is located below the guide surface 1321, that is, the unlocking member 41 can be completely embedded in the embedding groove 1323.

[0039] In one or other preferred embodiments, the first unlocking mechanism 3 can convert the stopper 2 from the locked state to the unlocked state through the second unlocking mechanism 4, so that the movement range of the stopper 2 is limited by the first unlocking mechanism 3. Of course, it can be understood that the first unlocking mechanism 3 can also unlock the stopper without the second unlocking mechanism 4. In the embodiment of the present application, in order to save space, the first unlocking mechanism 3 uses the second unlocking mechanism 4 to unlock the stopper 2. In particular, the side surface of the unlocking member 41 away from the stopper 2 can be against the transmission member 31. At this time, when the part of the unlocking member 41 protruding from the housing 1 is triggered, the end of the unlocking member 41 that is against the transmission member 31 rotates to push the stopper 2 to move. In other words, when the transmission member 31 moves, the end of the unlocking member 41 that is against the transmission member 31 rotates to push the stopper 2 to move. At the same time, the part of the unlocking member 41 that is protruding from the housing 1 also rotates accordingly.

[0040] In one or other preferred embodiments, the force arm of the transmission member 31 is greater than the force arm of the stop member 2, so that the force required when the transmission member 31 is driven is less than the force required to reset the stop member 2, thereby making the triggering of the transmission member 31 more labor-saving.

[0041] In one or other preferred embodiments, the stop member 2 has a trigger portion 21, and the trigger portion 21 can be offset against the unlocking member 41, or against the transmission member 31, or against both the unlocking member 41 and the transmission member 31. Those skilled in the art only need to make some adaptive adjustments, and these adjustments do not require creative labor, and therefore are all protected by this application.

[0042] In one or other preferred embodiments, a guide portion 5 is provided on the surface of the trigger portion 21 facing the unlocking member 41 and / or the surface of the transmission member 31 facing the stop member 2 and / or the unlocking member 41. The guide portion 5 may be an inclined surface or an arc surface. The guide portion 5 is provided to facilitate smoother force transmission between the transmission member 31 and / or the unlocking member 41 and the stop member 2. Therefore, whether it is the surface of the trigger portion 21 facing the unlocking member 41, the surface of the transmission member 31 facing the stop member 2, or the surface of the unlocking member 41 facing the stop member 2 and / or the transmission member 31, a guide portion 5 may be provided to facilitate force transmission.

[0043] Combination Figure 6 As shown, FIG6 shows an exploded schematic diagram of an electric tool in an embodiment of the present application. In some embodiments, the electric tool includes a housing 6, a motor, a transmission mechanism, and a battery pack mentioned in any of the above embodiments. The housing 6 may include two half shells, which may be connected by bolts. The housing 6 may be formed with a battery connecting portion 61, and the battery connecting portion 61 is provided with a locking groove 611 for inserting the locking portion 132. The stopper 2 can stop the locking portion 132 in the locking groove 611 to reduce the probability of the battery pack detaching.

[0044] The motor is housed in the housing 6 and receives energy from the battery pack to provide power. The transmission mechanism is connected to the motor and has an output shaft, thereby transmitting the power of the motor to the output shaft. The output shaft can be connected to tool accessories to perform various operations.

[0045] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery pack, characterized in that: include: case; A bracket connected to the interior of the shell; A battery cell, at least partially supported by the support; A locking member, comprising an operating portion and a locking portion; A stopper having a locked state and an unlocked state, wherein when the stopper is in the locked state, the stopper restricts the movement of the locking portion; and when the stopper is in the unlocked state, the locking portion is free to move; The first unlocking mechanism switches the stopper from the locked state to the unlocked state.

2. The battery pack according to claim 1, characterized in that: It also includes a second unlocking mechanism, which can switch the stopper from the locked state to the unlocked state; the first unlocking mechanism is located at the operating part, and the first unlocking mechanism is triggered before the operating part.

3. The battery pack according to claim 2, characterized in that: The locking portion has a guiding surface and a locking surface, the second unlocking mechanism is located on the guiding surface, and the second unlocking mechanism is triggered before the guiding surface; the first unlocking mechanism switches the stopper from the locking state to the unlocking state through the second unlocking mechanism.

4. The battery pack according to claim 1 or 3, characterized in that: The first unlocking mechanism includes a transmission member slidably connected in the shell, and the locking portion is provided with a making way groove for the transmission member; when the transmission member is triggered, the stop member switches from the locking state to the unlocking state; a first guide rail portion for limiting the movement of the stop member is provided in the shell; and a second guide rail portion for limiting the movement of the transmission member is provided in the shell.

5. The battery pack according to claim 4, characterized in that: The first unlocking mechanism also includes a pressing member and a reset member. A guide portion is provided at the contact point between the pressing member and the transmission member and / or between the transmission member and the pressing member. When the pressing member is pressed, the reset member is deformed and has a tendency to reset the pressing member, the transmission member is triggered, and the stop member can be driven by the transmission member. The pressing member is provided on the operating portion.

6. The battery pack according to claim 4, characterized in that: The second unlocking mechanism comprises an unlocking member pivoted on the locking portion, one end of the unlocking member protrudes from the housing, and the other end of the unlocking member abuts against the stopper.

7. The battery pack according to claim 6, characterized in that: The locking portion is provided with an embedding groove for the unlocking member to be embedded in; when the unlocking member drives the stop member to be in an unlocking state, the unlocking member is at least partially embedded in the embedding groove, and / or the surface of the unlocking member is flush with the surface of the guide surface or is located below the surface of the guide surface; the side surface of the unlocking member facing away from the stop member is against the transmission member, and the force arm of the transmission member is greater than the force arm of the stop member.

8. The battery pack according to claim 7, characterized in that: The stop member is slidably connected to the top of the shell, and when the stop member is in the locked state, the stop member is located below the locking portion; the stop member has a trigger portion, and the trigger portion abuts against the unlocking member; a guide portion is provided on the surface of the trigger portion facing the unlocking member and / or the surface of the transmission member facing the stop member and / or the unlocking member.

9. The battery pack according to claim 1, characterized in that: It also includes an elastic member, which is deformed and has a tendency to reset the locking portion when the operating portion is pressed; a biasing member is provided on the side of the stop member away from the locking portion, and the biasing member has a tendency to bias the stop member toward the locking portion; the shell is provided with an exit hole for the locking portion to pass through, and when the stop member is in a locked state, the stop member and the exit hole at least partially overlap in the orthographic projection of the top surface of the shell.

10. An electric tool, characterized in that: include: A housing having a battery connection portion; The motor is housed in the housing and provides power; A transmission mechanism, connected to the motor and having an output shaft, wherein the transmission mechanism receives power from the motor and transmits the power to the output shaft; as well as, A battery pack as described in any one of claims 1-9, wherein the battery pack is connected to the battery connecting portion to provide energy to the motor.

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