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 and a cover body, 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 plurality of limiting holes, the other one of the shell and the cover body is provided with a plurality of protruding parts in one-to-one correspondence with the limiting holes, each protruding part is arranged in the corresponding limiting hole in a penetrating mode, each protruding part is sleeved with an elastic part, and the elastic parts abut against the hole walls of the limiting holes. 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 technical field of tools, and in particular to a vibration damping structure for a battery pack, a battery pack, and a power tool. Background Art

[0002] With the continuous update and development of the manufacturing technologies of various tools, the applicability of different tools is also continuously improved. Since a power tool is equipped with a battery pack itself, it does not need to draw power from the outside during the operation process, and can be used in a relatively wide range of operation scenarios.

[0003] However, when the battery pack is equipped on a tool with obvious vibration, wear is likely to occur during the operation process of the tool. Under the long-term adverse effect of vibration on the battery pack, it is not conducive to the normal use of the battery pack. Therefore, how to reduce the adverse effects on the battery pack caused by vibration is an important issue. Summary of the Utility Model

[0004] The purpose of the embodiments of the present application is to provide a vibration damping structure for a battery pack, a battery pack, and a power tool, which can help reduce the adverse effects on the battery pack caused by vibration.

[0005] To solve the above technical problems, an embodiment of the present application provides a vibration damping structure for a battery pack. The vibration damping structure for a battery pack includes a housing and a cover. The housing has an inner cavity for accommodating a battery assembly and an opening communicating with the inner cavity. The cover covers the opening. One of the housing and the cover is provided with a plurality of limiting holes, and the other is provided with a plurality of protruding parts corresponding to the plurality of limiting holes one by one. Each protruding part passes through the corresponding limiting hole, and an elastic member is sleeved on each protruding part, and the elastic member abuts against the hole wall of the limiting hole.

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

[0007] An embodiment of the present application also provides a power tool, which includes the above-mentioned battery pack.

[0008] The vibration damping structure for a battery pack, the battery pack, and the power tool provided by the embodiments of the present application use an elastic member to buffer the vibration of the battery pack under the influence of its own weight in the outer packaging part of the battery pack. One of the housing and the cover is provided with limiting holes, and the other is provided with corresponding protruding parts. The elastic member is sleeved on the protruding part and abuts against the hole wall of the limiting hole. The self-vibration phenomenon of the battery pack can be reduced through the elastic deformation of the elastic member itself, and further the adverse effects on the battery pack caused by vibration can be reduced.

[0009] In some embodiments, the extending length of the protrusion in the axial direction of the corresponding limiting hole is less than the extending length of the elastic member in the axial direction of the limiting hole. In this way, by making the overall length of the elastic member exceed the overall length of the protrusion, the elastic member can play a vibration damping role within a larger range.

[0010] In some embodiments, the elastic member includes a hollow main body portion and an extending portion protruding from one end of the main body portion toward the hollow portion. The main body portion is sleeved on the protrusion, and the extending portion abuts against the end face of the protrusion. In this way, by providing the extending portion in the elastic member, the contact area between the elastic member and the protrusion can be increased, thereby increasing the acting range of the elastic member.

[0011] 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, with the split housing structure, it is convenient to assemble the housing and the cover.

[0012] In some embodiments, both the first housing and the second housing are provided with limiting holes, and the cover is provided with protrusions. The protrusions are inserted into the limiting holes from the side close to the inner cavity of the corresponding limiting holes. In this way, by providing the limiting holes in different housing parts, the load influence at the connection between the housing and the cover can be dispersed.

[0013] In some embodiments, it further includes a plurality of fasteners corresponding to the plurality of limiting holes one by one. Each protrusion is provided with a threaded hole, and each fastener passes through the corresponding limiting hole and is screwed into the threaded hole. In this way, by tightening the fasteners at the position where the elastic member is located, the connection stability at the vibration damping position can be ensured.

[0014] In some embodiments, the cover is provided with a boss surrounding the protrusion, and one end of the elastic member abuts against the boss. In this way, by providing the boss, it is convenient to position the elastic member on the protrusion.

[0015] In some embodiments, the housing is provided with a limiting rabbet, and the end face of the cover enters the inner cavity and abuts against the limiting rabbet. In this way, through the cooperation between the limiting rabbet and the cover, the connection tightness between the cover and the housing can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise stated, and the drawings in the figures do not constitute a proportional limitation.

[0017] Figure 1 is a schematic perspective view of a battery pack provided by some embodiments of the present application;

[0018] Figure 2 It is a front view structural schematic diagram of a battery pack provided by some embodiments of the present application;

[0019] Figure 3 It is along Figure 2 The sectional view structural schematic diagram in the A-A direction in

[0020] Figure 4 It is Figure 3 The enlarged structural schematic diagram at position B in

[0021] Figure 5 It is a front view structural schematic diagram of an elastic member in a battery pack provided by some embodiments of the present application;

[0022] Figure 6 It is a front view structural schematic diagram of an elastic member in a battery pack provided by some other embodiments of the present application;

[0023] Figure 7 It is the enlarged structural schematic diagram of a battery pack provided by some other embodiments of the present application at the elastic member;

[0024] Figure 8 It is an exploded structural schematic diagram of a battery pack provided by some embodiments of the present application;

[0025] Figure 9 It is a three-dimensional structural schematic diagram of a cover body in a battery pack provided by some embodiments of the present application;

[0026] Figure 10 It is a top view structural schematic diagram of a cover body in a battery pack provided by some embodiments of the present application. Specific embodiments

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will elaborate on each implementation manner of the present application in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in each implementation manner of the present application, many technical details are presented for the readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation manners, the technical solutions claimed in the present application can still be achieved. The division of the following embodiments is for convenience of description and should not constitute any limitation to the specific implementation manner of the present application. The various embodiments can be combined and cross-referenced with each other on the premise of no contradiction.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments 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 accompanying drawing descriptions are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, technical terms such as "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may also be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0030] As the overall power of the power tool gradually increases, the volume of the battery pack equipped with the power tool is also constantly increasing. When the battery pack is configured on tools with large vibrations, such as an electric wrench or a hammer drill, due to the self-weight of the battery pack, the battery pack and the handle of the tool housing will wear during vibration use. In addition, due to wear, the battery pack and the housing will shake relatively, and there may be arcing at the connection between the battery clip of the housing and the battery pack.

[0031] To solve the problem of wear of the battery pack due to vibration, some embodiments of the present application provide a vibration damping structure for the battery pack. The housing encapsulation part involved in the vibration damping structure of the battery pack adopts a split structure, and a vibration damping structure is added to the housing encapsulation part of the battery pack. That is, a split vibration damping structure is added to the battery pack itself, and an elastic element, such as a rubber ring, is attached, so that when the battery pack shakes, it can rely on the elastic element to damp vibration and reduce the wear of the battery pack guide rail and battery clip.

[0032] The following will be combined with Figures 1 to 10 to illustrate the vibration damping structure provided in the battery pack of some embodiments of the present application.

[0033] As Figures 1 to 10 shown, the vibration damping structure of the battery pack provided in some embodiments of the present application includes a housing 11 and a cover 12. The housing 11 has 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 housing 11 and the cover 12 is provided with a plurality of limiting holes 101, and the other is provided with a plurality of protruding parts 102 corresponding to the plurality of limiting holes 101 one by one. Each protruding part 102 is inserted into the corresponding limiting hole 101, and an elastic member 13 is sleeved on each protruding part 102, and the elastic member 13 abuts against the hole wall of the limiting hole 101.

[0034] The housing 11 is the main part of the outer shell encapsulation part of the battery pack. The inner cavity 1101 of the housing 11 provides a receiving space for the installation of the battery assembly 21. The battery assembly 21 includes a battery cell that provides power for the operation of the power tool and a circuit board that has a control and connection function. The opening 1102 of the housing 11 communicates with the inner cavity 1101, facilitating the placement and removal of the battery assembly 21.

[0035] The cover 12 is the part that closes the opening 1102 of the housing 11. The connection between the cover 12 and the housing 11 can be achieved through the fastener 14 or other detachable connection forms. At the same time, the cover 12 is provided with a locking structure that can be paired with the tool housing, so that the battery pack is installed on the tool housing and electrically connected to the driving part of the tool. During the operation of the power tool, vibration is mainly conducted to the battery pack through the connection between the cover 12 and the housing. Then, under the influence of the self-weight of the battery pack, wear occurs, causing the battery pack to shake.

[0036] An elastic member 13 is used for vibration damping at the mating position of the housing 11 and the cover 12. One of the housing 11 and the cover 12 is provided with a limiting hole 101, and the other is provided with a protruding portion 102. The protruding portion 102 is inserted into the limiting hole 101. At the same time, the elastic member 13 is arranged between the protruding portion 102 and the hole wall of the limiting hole 101, and can buffer the shaking of the battery pack itself through its own elastic deformation. Reduce the adverse effect of the self-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 elastic effect. In actual situations, the limiting hole 101 can be arranged on the housing 11, the protruding portion 102 can be arranged on the cover 12, or the limiting hole 101 can be arranged on the cover 12, and the protruding portion 102 can be arranged on the housing 11. The number of the limiting holes 101 and the protruding portions 102 can be four, five, six or seven. Multiple limiting holes 101 and multiple protruding portions 102 can be symmetrically arranged, evenly arranged or randomly arranged.

[0037] For the battery pack vibration damping structure provided by some embodiments of the present application, an elastic member 13 is used in the outer shell encapsulation part of the battery pack to buffer the vibration of the battery pack under the influence of its own weight. One of the housing 11 and the cover 12 is provided with a limiting hole 101, and the other is provided with a corresponding protruding portion 102. The elastic member 13 is sleeved on the protruding portion 102 and abuts against the hole wall of the limiting hole 101. Through the elastic deformation of the elastic member 13 itself, the self-vibration phenomenon of the battery pack can be reduced, and then the adverse effects suffered by the battery pack due to vibration can be reduced.

[0038] In some embodiments, the extension length of the protruding portion 102 in the axial direction of the corresponding limiting hole 101 is less than the extension length of the elastic member 13 in the axial direction of the limiting hole 101.

[0039] That is, the overall length of the protruding portion 102 is less than the overall length of the elastic member 13. When the elastic member 13 is mounted on the protruding portion 102, the end of the elastic member 13 protrudes from the end of the protruding portion 102, and the end face of the elastic member 13 protrudes a certain distance relative to the end face of the protruding portion 102. This can provide a suitable size for the elastic member 13 to play a buffering role. The elastic member 13 can offset the vibration and impact acting on the cover 12 in the length direction, and reduce the vibration influence caused by the self-weight of the battery pack.

[0040] In some embodiments, such as Figure 6 and Figure 7 as shown, the elastic member 13 may include a hollow main body portion 131 and an extension portion 132 extending from one end of the main body portion 131 toward the hollow portion. The main body portion 131 is sleeved on the protruding portion 102, and the extension portion 132 abuts against the end face of the protruding portion 102.

[0041] The elastic member 13 is integrally in a hollow shape, and the hollow portion can accommodate the protruding portion 102. The inner surface of the elastic member 13 close to the hollow portion can abut against the protruding portion 102. On the basis of having a hollow shape, the elastic member 13 can be provided with an extension portion 132 at the end, and the extension portion 132 occupies a certain area in the radial direction. After the elastic member 13 is mounted on the protruding portion 102, the extension portion 132 of the elastic member 13 can form a large contact area with the end face of the protruding portion 102, so as to better play a role in buffering vibration and impact.

[0042] In some embodiments, 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] That is to say, the housing 11 can adopt a split structure and be connected to form a whole. Different parts of the housing 11 are combined together in a splicing form. During the connection process of the housing 11 and the cover 12, different housing parts can be first positioned with the cover 12, and then different housing parts are connected together by fixing members 15 to form a whole. The fixing member 15 can pass through the through hole on the first housing 111 and be screwed into the mounting hole of the second housing 112, so as to realize the splicing between different housing parts. After the housing parts are connected, by connecting the cover 12, the overall structure of the outer shell of the battery pack is formed. By adopting a split housing structure, the operation difficulty during the assembly of the housing 11 and the cover 12 is reduced.

[0044] In addition, a vibration damping structure can be provided on different housings 11 to disperse the influence of the load on the battery pack itself and reduce the wear phenomenon of the battery pack caused by vibration.

[0045] Such as Figure 8As shown, both the first housing 111 and the second housing 112 can be provided with limiting holes 101, and the cover 12 is provided with a protruding portion 102. The protruding portion 102 is inserted into the corresponding limiting hole 101 from the side close to the inner cavity 1101 of the limiting hole 101.

[0046] The limiting holes 101 are provided on the housing 11, which can avoid interference with other components when assembling the housing 11. The cover 12 is provided with a protruding portion 102, on which an elastic member 13 can be installed to form a shock-absorbing structure when assembled with the housing 11. A plurality of limiting holes 101 are symmetrically arranged on different housing parts, and the orientation of the limiting holes 101 is perpendicular to the orientation of the opening 1101. The elastic member 13 is sleeved on the protruding portion 102 along the horizontal direction, which can better buffer the influence of the gravity of the battery pack itself. In actual situations, the protruding portion 102 can also be provided on the housing 11, and the limiting holes 101 can be provided on the cover 12. At the same time, the cover 12 can also be provided with a split structure, that is, including a first cover and a second cover that are detachably connected, so as to facilitate assembly with the housing 11.

[0047] In addition, the shock-absorbing structure of the battery pack can further include a plurality of fasteners 14 corresponding to the plurality of limiting holes 101 one by one. Each protruding portion 102 is provided with a threaded hole 103, and each fastener 14 passes through the corresponding limiting hole 101 and is screwed into the threaded hole 103.

[0048] The limiting holes 101 are in the form of through holes and are formed with a stepped surface 1011. When connecting the housing 11 and the cover 12, the fastener 14 can pass through the limiting hole 101 and cooperate with the threaded hole 103 opened on the protruding portion 102, so as to fix the housing 11 and the cover 12. At the same time, during the process of locking the housing 11 and the cover 12 by the fastener 14, the elastic member 13 is compressed to a certain extent. And when the battery pack is affected by vibration and impact, the elastic deformation of the elastic member 13 itself buffers the adverse effects generated at the connection of the cover 12 due to the self-weight of the battery pack.

[0049] In some embodiments, the cover 12 can be provided with a boss 104 surrounding the protruding portion 102, and one end of the elastic member 13 abuts against the boss 104.

[0050] The boss 104 is provided at the bottom end of the protruding portion 102, which can limit the installation of the elastic member 13. When installing the elastic member 13, one end of the elastic member 13 can be made to abut against the boss 104, thereby limiting the installation position of the elastic member 13. And the other end of the elastic member 13 can be locked on the stepped surface 1011 of the mounting hole of the housing 11 through the connection of the fastener 14.

[0051] In some embodiments, the housing 11 can be provided with a limiting rabbet 113, and the end face of the cover 12 enters the inner cavity 1101 and abuts against the limiting rabbet 113.

[0052] The setting of the limiting stop 113 provides a positioning relationship for the cooperation between the cover body 12 and the housing 11, and can ensure the connection tightness between the cover body 12 and the housing 11 after the cover body 12 is fixed to the housing 11.

[0053] Some embodiments of the present application further provide a battery pack, which includes a battery assembly 21 and the above-mentioned battery pack damping structure. The inner cavity 1101 of the housing 11 of the battery pack damping structure houses the battery assembly 21.

[0054] By arranging a damping structure between the cover body 12 and the housing 11, the battery pack can reduce the influence of vibration and shock received during the working conditions. During vibration in the use process, due to the large self-weight of the battery pack, it is easily affected. When facing vibration and shock for a long time, the connection between the battery pack and the tool housing is prone to shaking, and then sparking or poor contact may occur, affecting normal use. The setting of the damping structure can buffer the influence of the load during vibration, play a damping role, and reduce the wear phenomenon of the battery pack due to its own weight.

[0055] Some embodiments of the present application further provide a power tool, which includes the above-mentioned battery pack.

[0056] The power tool is equipped with a battery pack as a power source to provide stable power for the driving member to drive the executing member to perform operation. The power tool can be a tool such as a hammer drill, an electric wrench or an electric grinder. By arranging a damping structure on the outer shell encapsulation part of the battery pack, the influence of vibration and shock received by the battery pack during the operation of the power tool can be reduced, which is beneficial to improving the service life of the battery pack.

[0057] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present application, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present application.

Claims

1. A vibration damping structure for a battery pack, characterized in that, Comprising: A housing having an inner cavity for accommodating a battery assembly and an opening communicating with the inner cavity; A cover body covering the opening; One of the housing and the cover body is provided with a plurality of limiting holes, and the other is provided with a plurality of protruding parts corresponding to the plurality of limiting holes one by one. Each protruding part is inserted into the corresponding limiting hole, and an elastic member is sleeved on each protruding part, and the elastic member abuts against the hole wall of the limiting hole.

2. The battery pack damping structure according to claim 1, wherein: The extending length of the protruding part in the axial direction of the corresponding limiting hole is less than the extending length of the elastic member in the axial direction of the limiting hole.

3. The battery pack damping structure according to claim 1 or 2, wherein: The elastic member includes a hollow main body part and an extending part protruding from one end of the main body part toward the hollow part. The main body part is sleeved on the protruding part, and the extending part abuts against the end face of the protruding part.

4. The battery pack damping 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.

5. The battery pack damping structure according to claim 4, wherein: Both the first housing and the second housing are provided with the limiting holes, the cover body is provided with the protruding parts, and the protruding parts are inserted into the limiting holes from the side of the corresponding limiting holes close to the inner cavity.

6. The battery pack damping structure according to claim 1, wherein: It further includes a plurality of fasteners corresponding to the plurality of limiting holes one by one. Each protruding part is provided with a threaded hole, and each fastener passes through the corresponding limiting hole and is screwed into the threaded hole.

7. The battery pack damping structure according to claim 1, wherein: The cover body is provided with a boss surrounding the protruding part, and one end of the elastic member abuts against the boss.

8. The battery pack damping structure according to claim 1, wherein: The housing is provided with a limiting rabbet, and the end face of the cover body enters the inner cavity and abuts against the limiting rabbet.

9. A battery pack, characterized in that, Comprising: A battery assembly; The battery pack damping structure according to any one of claims 1 to 8, and the inner cavity of the housing of the battery pack damping structure accommodates the battery assembly therein.

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

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