Battery pack damping structure, battery pack and electric tool

Abstract

The utility model relates to the technical field of tools, and discloses a battery pack vibration reduction structure, a battery pack and an electric tool. The battery pack damping structure comprises a shell, a cover body and an elastic piece, the shell is provided with an inner cavity for containing the battery assembly and an opening communicated with the inner cavity. And the cover body covers the opening. One of the shell and the cover body is provided with a groove, and the other one of the shell and the cover body is provided with a protruding part which is clamped into the groove. And the elastic piece is filled between the protruding part and the inner wall surface of the groove. According to the battery pack vibration reduction structure, the battery pack and the electric tool provided by the invention, adverse effects on the battery pack due to vibration can be reduced.

Description

Technical Field

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

[0002] With the continuous development of tool technology, power tools, such as electric wrenches, electric hammers, and electric reciprocating saws, have been applied in various construction fields. As the application areas of power tools continue to expand, higher performance requirements are also being placed on power tools.

[0003] As the power output component of power tools, battery packs play a key role in improving their performance. When used with tools subject to significant vibration, battery packs are susceptible to wear during operation. Long-term exposure to vibration can negatively impact the battery pack's performance. Therefore, minimizing the negative effects of vibration on battery packs is a critical issue. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a battery pack vibration reduction structure, a battery pack and an electric tool, which can help reduce the adverse effects of vibration on the battery pack.

[0005] To address the aforementioned technical issues, embodiments of the present application provide a battery pack vibration damping structure. The battery pack vibration damping structure includes a housing, a cover, and an elastic member. The housing defines an inner cavity for accommodating the battery assembly and an opening communicating with the inner cavity. The cover covers the opening. One of the housing and the cover defines a groove, and the other defines a protrusion that engages the groove. The elastic member is positioned between the protrusion and the inner wall of the groove.

[0006] The embodiment of the present application further provides a battery pack, which includes a battery assembly and the above-mentioned battery pack vibration reduction structure. The inner cavity of the housing of the battery pack vibration reduction structure accommodates the battery assembly.

[0007] An embodiment of the present application further provides an electric tool, which includes the above-mentioned battery pack.

[0008] The battery pack vibration damping structure, battery pack, and power tool provided in the embodiments of this application utilize an elastic member within the battery pack's outer shell to dampen vibrations caused by the pack's own weight. One of the shell and cover is provided with a groove, and the other with a corresponding protrusion. The protrusion engages the groove, and the elastic member fills the space between the protrusion and the inner wall of the groove. The elastic deformation of the elastic member reduces the battery pack's inherent vibration, thereby alleviating the adverse effects of vibration on the battery pack.

[0009] In some embodiments, the length of the elastic member in the depth direction of the groove is greater than the length of the protrusion in the depth direction of the groove. In this way, by adopting a longer elastic member, a vibration reduction effect can be achieved in a larger range.

[0010] In some embodiments, the protrusion includes a first surface and a second surface disposed opposite each other along the direction of the opening, and a third surface connecting the first and second surfaces. The elastic member includes a first portion and a second portion connected to each other, the first portion filling the gap between the second surface and the inner wall of the groove, and the second portion filling the gap between the third surface and the inner wall of the groove. In this way, by filling different portions of the elastic member at different intervals between the housing and the cover, a vibration reduction effect can be achieved in multiple directions and multiple regions.

[0011] In some embodiments, the elastic member is disposed around the opening. Thus, by disposing the elastic member around the opening, the elastic member can play a vibration-damping role in the entire area around the opening.

[0012] In some embodiments, the cross section of the elastic member is rectangular, circular, or trapezoidal. In this way, the elastic member can be easily manufactured and formed by using elastic members of regular shapes.

[0013] In some embodiments, the housing includes a first housing and a second housing that are detachably connected, and the first housing and the second housing are symmetrically arranged. In this way, the housing can be assembled and connected to the cover body by adopting a split housing form.

[0014] In some embodiments, both the first and second shells are provided with grooves, and the cover is provided with a protrusion, with the grooves facing the inner cavity. In this way, by providing grooves in different parts of the shells, the vibration impact caused by the weight of the battery pack can be dispersed.

[0015] In some embodiments, the battery pack vibration damping structure further includes a fastener. The first housing is provided with a threaded hole, and the second housing is provided with a through hole. The fastener passes through the through hole and screws into the threaded hole. In this way, the fastener can connect the housing parts, simplifying the assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of a battery pack provided in some embodiments of the present application;

[0018] Figure 2is a schematic cross-sectional structural diagram of a battery pack provided in some embodiments of the present application;

[0019] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4 is an enlarged structural schematic diagram of a battery pack at an elastic member provided in other embodiments of the present application;

[0021] Figure 5 is an enlarged structural diagram of a battery pack at an elastic member provided in some other embodiments of the present application;

[0022] Figure 6 This is a schematic diagram of the exploded structure of the battery pack provided in some embodiments of the present application. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation of the present application. The various embodiments can be combined with each other and referenced to each other under the premise of no contradiction.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0025] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections, or electrical connections; direct connections, or indirect connections through an intermediate medium; and can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0026] As power tools increase in power, the size of their battery packs is also increasing. When a battery pack is used in a tool subject to high vibration, such as an electric wrench or hammer, the weight of the battery pack can cause wear between the battery pack and the tool's handle. Furthermore, wear can cause relative movement between the battery pack and the tool housing, potentially sparking at the connection between the battery clamp and the battery pack.

[0027] To address the issue of battery pack wear caused by vibration, some embodiments of the present application provide a battery pack vibration reduction structure. The battery pack's outer shell and packaging are designed as a split structure, with the vibration reduction structure added to the battery pack's outer shell. Specifically, the battery pack itself is equipped with a split vibration reduction structure and an elastic element, such as a rubber ring. This allows the elastic element to reduce vibration when the battery pack shakes, thereby reducing wear on the battery pack rails and battery clamps.

[0028] The following combination Figures 1 to 6 The vibration reduction structure provided in the battery pack provided in some embodiments of the present application is described.

[0029] like Figures 1 to 6 As shown, the battery pack vibration reduction structure provided by some embodiments of the present application includes a shell 11, a cover 12 and an elastic member 13. The shell 11 is provided with an inner cavity 1101 for accommodating the battery assembly 21 and an opening 1102 communicating with the inner cavity 1101. The cover 12 covers the opening 1102. One of the shell 11 and the cover 12 is provided with a groove 101, and the other is provided with a protrusion 102, which is inserted into the groove 101. The elastic member 13 is filled between the protrusion 102 and the inner wall surface of the groove 101.

[0030] The housing 11 is the primary enclosure for the battery pack. An internal cavity 1101 within the housing 11 accommodates the battery assembly 21. The battery assembly 21 includes cells that power the power tool and a circuit board with control and connectivity functions. An opening 1102 in the housing 11 communicates with the internal cavity 1101, facilitating the placement and removal of the battery assembly 21.

[0031] The cover 12 is the portion that closes the opening 1102 of the housing 11. The connection between the cover 12 and the housing 11 can be achieved by fasteners or other detachable connection methods. At the same time, the cover 12 is provided with a locking structure that can be paired with the tool housing, thereby allowing the battery pack to be installed on the tool housing and electrically connected to the drive part of the tool. During the operation of the power tool, vibration is mainly transmitted to the battery pack through the connection between the cover 12 and the housing. Then, under the influence of the battery pack's own weight, wear occurs, causing the battery pack to shake.

[0032] The matching position of the shell 11 and the cover 12 adopts an elastic member 13 for vibration reduction. One of the shell 11 and the cover 12 is provided with a groove 101, and the other is provided with a protrusion 102, and the protrusion 102 is stuck in the groove 101. At the same time, the elastic member 13 is provided between the protrusion 102 and the inner wall surface of the groove 101, and can cushion the shaking of the battery pack itself through its own elastic deformation. Reduce the adverse effects of the weight of the battery pack on the connection between the cover 12 and the tool housing. The elastic member 13 can be a rubber member made of different materials or a metal member with elasticity. In actual circumstances, the groove 101 can be provided on the shell 11 and the protrusion 102 can be provided on the cover 12, or the groove 101 can be provided on the cover 12 and the protrusion 102 can be provided on the shell 11.

[0033] Some embodiments of the present application provide a battery pack vibration damping structure that utilizes an elastic member 13 within the battery pack's outer shell to dampen vibrations caused by the pack's own weight. One of the housing 11 and the cover 12 is provided with a groove 101, while the other has a corresponding protrusion 102. The protrusion 102 engages the groove 101, and the elastic member 13 fills the space between the protrusion 102 and the inner wall of the groove 101. The elastic deformation of the elastic member 13 mitigates the inherent vibration of the battery pack, thereby alleviating the adverse effects of vibration on the battery pack.

[0034] In some embodiments, the length of the elastic member 13 in the depth direction of the groove 101 may be greater than the length of the protrusion 102 in the depth direction of the groove 101 .

[0035] The overall protruding length of the protrusion 102 is adapted to the depth of the groove 101. After the protrusion 102 is inserted into the groove 101, there is a certain gap between the end face of the protrusion 102 and the inner wall surface of the bottom of the groove 101. By making the length of the elastic member 13 in the depth direction of the groove 101 greater than the length of the protrusion 102 in the depth direction of the groove 101, the elastic member 13 can completely cover the area where the protrusion 102 is inserted into the groove 101 and form abutment with the inner wall surface of the bottom of the groove 101. This plays a role in damping vibrations throughout the depth direction of the groove 101.

[0036] like Figure 4 As shown, the protrusion 102 may include a first surface 103 and a second surface 104 disposed opposite each other along the direction of the opening 1102, and a third surface 105 connecting the first surface 103 and the second surface 104. The elastic member 13 includes a first portion 131 and a second portion 132 connected to each other, wherein the first portion 131 fills between the first surface 103 and the inner wall of the groove 101, and the second portion 132 fills between the third surface 105 and the inner wall of the groove 101.

[0037] Surfaces at different locations on the protrusion 102 correspond to different inner wall surfaces of the groove 101. The elastic member 13 has portions that fill different gaps between the protrusion 102 and the groove 101. The first portion 131 of the elastic member 13 fills the gap between the first surface 103 of the protrusion 102 and the inner wall surface of the groove 101, while the second portion 132 of the elastic member 13 fills the gap between the third surface 105 of the protrusion 102 and the inner wall surface of the groove 101. The elastic member 13 has an overall L-shaped cross-section, which can provide vibration damping in different directions, buffering the impact of vibrations from different directions.

[0038] In some embodiments, the elastic member 13 may be disposed around the opening 1102 of the housing 11 .

[0039] In other words, the elastic member 13 is annular as a whole and can form a vibration-damping ring, thereby achieving a vibration-damping effect at any position around the opening 1102 of the housing 11. The effective area of ​​the elastic member 13 is ensured to cover any position where the housing 11 and the cover 12 are connected.

[0040] In some embodiments, the cross-section of the elastic member 13 may be rectangular, circular, or trapezoidal.

[0041] The elastic member 13 of regular shape can be easily manufactured and formed. At the same time, elastic members 13 of different shapes can be used for filling in accordance with the different assembly shapes between the shell 11 and the cover 12. Figure 3 As shown, the elastic member 13 may have a rectangular cross section, such as Figure 5 As shown, the elastic member 13 may have a circular cross section. In actual situations, the cross section of the elastic member 13 may also be an irregular shape.

[0042] like Figure 6 As shown, the housing 11 may include a first housing 111 and a second housing 112 that are detachably connected, and the first housing 111 and the second housing 112 are symmetrically arranged.

[0043] In other words, the housing 11 can be split and connected to form a single unit. The different parts of the housing 11 are assembled together in a spliced ​​manner. During the connection process between the housing 11 and the cover 12, the different parts of the housing 11 can be first positioned with the cover 12, and then connected together using fasteners to form a single unit. The cover 12 is then connected to form the overall structure of the battery pack's outer shell. This reduces the operational difficulty of assembling the housing 11 and the cover 12.

[0044] In addition, vibration reduction structures may be provided on different housings 11 to disperse the impact of the load on the battery pack itself and reduce wear of the battery pack due to vibration.

[0045] In some embodiments, the first shell 111 and the second shell 112 may both be provided with a groove 101 , the cover 12 may be provided with a protrusion 102 , and the groove 101 is provided toward the inner cavity 1101 .

[0046] The groove 101 is provided on the shell 11, which can avoid interference with other components when assembling the shell 11. The cover body 12 is provided with a protrusion 102, which can form a vibration reduction structure when assembled with the shell 11 through the elastic member 13. The groove 101 faces the inner cavity 1101. After the protrusion 102 is inserted into the groove 101, the cover body 12 can be restricted from being separated from the shell 11 along the direction of the opening 1101. In addition, the elastic member 13 is supported on the inner wall surface of the groove 101 along the direction of the opening 1101, which can better buffer the influence of the battery pack's own gravity. In actual circumstances, the protrusion 102 can also be provided on the shell 11, and the groove 101 can be provided on the cover body 12. At the same time, the cover body 12 can be provided with a split structure, that is, it includes a first cover body and a second cover body that are detachably connected, so as to facilitate assembly with the shell 11.

[0047] In addition, the battery pack vibration reduction structure may further include a fastener. The first shell 111 is provided with a threaded hole 1111 , and the second shell 112 is provided with a through hole 1121 . The fastener 14 passes through the through hole 1121 and is screwed into the threaded hole 1111 .

[0048] When connecting the housing 11 and cover 12, the different housing 11 sections can be assembled with the cover 12 first, and then the fastener 14 can be inserted through the through-hole 1121 and engaged with the threaded hole 1111 to secure the housing 11 and cover 12. Simultaneously, as the fastener 14 secures the housing 11 and cover 12, the elastic member 13 undergoes a certain degree of compression. Furthermore, when the battery pack is subjected to vibration and impact, the elastic member 13 deforms elastically, mitigating any adverse effects of the battery pack's own weight on the connection to the cover 12.

[0049] Some embodiments of the present application further provide a battery pack, comprising a battery assembly 21 and the aforementioned battery pack vibration reduction structure. The inner cavity 1101 of the housing 11 of the battery pack vibration reduction structure accommodates the battery assembly 21 therein.

[0050] The battery pack incorporates a vibration-damping structure between the cover 12 and the housing 11 to mitigate the effects of vibration during use. Due to the significant weight of the battery pack, vibrations can be detrimental to the battery pack. Sustained vibrations can cause the connection between the battery pack and the tool housing to wobble, potentially leading to sparks or poor contact, affecting normal operation. The vibration-damping structure cushions the impact of vibrations, providing a dampening effect and reducing wear on the battery pack caused by its own weight.

[0051] Some embodiments of the present application also provide an electric tool, which includes the above-mentioned battery pack.

[0052] Power tools use battery packs as a power source, providing stable power for the driver to drive the actuators during operation. Power tools can be electric hammers, electric wrenches, or electric grinders. A vibration-damping structure within the battery pack's housing reduces the impact of vibration and shock on the battery pack during power tool operation, thereby extending its service life.

[0053] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present application, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. A battery pack vibration reduction structure, characterized in that: include: a housing having an inner cavity for accommodating the battery assembly and an opening communicating with the inner cavity; a cover body, covering the opening; One of the housing and the cover is provided with a groove, and the other is provided with a protrusion, and the protrusion is snapped into the groove; The elastic member is filled between the protrusion and the inner wall surface of the groove.

2. The battery pack vibration reduction structure according to claim 1, characterized in that: The length of the elastic member in the depth direction of the groove is greater than the length of the protrusion in the depth direction of the groove.

3. The battery pack vibration reduction structure according to claim 1 or 2, characterized in that: The protrusion includes a first surface and a second surface arranged opposite to each other along the direction of the opening, and a third surface connecting the first surface and the second surface. The elastic member includes a first part and a second part connected to each other, the first part is filled between the second surface and the inner wall surface of the groove, and the second part is filled between the third surface and the inner wall surface of the groove.

4. The battery pack vibration reduction structure according to claim 3, characterized in that: The elastic member is arranged around the opening.

5. The battery pack vibration reduction structure according to claim 1, wherein: The cross section of the elastic member is rectangular, circular or trapezoidal.

6. The battery pack vibration reduction structure according to claim 1, wherein: The housing includes a first housing and a second housing that are detachably connected, and the first housing and the second housing are symmetrically arranged.

7. The battery pack vibration reduction structure according to claim 6, characterized in that: The first shell and the second shell are both provided with the groove, the cover is provided with the protrusion, and the groove is arranged toward the inner cavity.

8. The battery pack vibration reduction structure according to claim 7, characterized in that: It also includes a fastener. The first shell is provided with a threaded hole, and the second shell is provided with a through hole. The fastener passes through the through hole and is screwed into the threaded hole.

9. A battery pack, characterized in that: include: Battery components; The battery pack vibration damping structure according to any one of claims 1 to 8, wherein the inner cavity of the shell of the battery pack vibration damping structure accommodates the battery assembly.

10. An electric tool, characterized in that: Including the battery pack according to claim 9.

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