Power tools and power tool components

Abstract

The present invention discloses an electric tool and an electric tool assembly, which belongs to the technical field of power tools and is designed to solve the problem that the existing electric tools are prone to poor contact with the power source. The electric tool of the present invention includes a housing, a connecting seat and an elastic element; the connecting seat is used to receive a battery pack and electrically connect the battery pack and the electric tool, and the connecting seat is movably connected to the housing through an elastic element, and the elastic element can at least generate a force in a direction inclined relative to the receiving direction to make the connecting seat contact the battery pack. When the electric tool and the electric tool assembly of the present invention work under harsh working conditions such as large amplitudes, the elastic element can enable the connecting seat to move in the receiving direction of the power source and in a direction perpendicular to the receiving direction of the power source, so that the connecting piece of the connecting seat and the terminal of the power source always maintain good contact, ensuring that the electric tool can always work normally, and avoiding the problem of wear of the terminals and connecting pieces caused by severe vibration of the electric tool.

Description

Technical Field

[0001] The present invention relates to the technical field of power tools, and in particular to an electric tool and an electric tool assembly. Background Art

[0002] Power tools, especially handheld DC power tools, such as impact drills and impact wrenches, usually use battery packs as power sources, and the battery packs are connected to the connection socket of the power tool host. However, under harsh working conditions (large amplitude and high vibration frequency of the power tool), poor contact between the power tool and the battery pack, as well as serious wear of the connecting piece and the connecting terminal are prone to occur, affecting the user experience and shortening the product life.

[0003] In response to the above problems, the main solution currently adopted in the market is: a protrusion is provided on the connecting seat along the receiving direction of the battery pack, and a corresponding groove is provided on the battery pack. The protrusion is inserted into the groove, and the free end of the protrusion abuts against the bottom surface of the groove to limit the movement of the connecting seat perpendicular to the receiving direction. Although this method reduces wear to a certain extent, due to the inability to achieve seamless cooperation between the groove and the protrusion, poor contact may still exist under vibration conditions. In some other methods, a floating connecting seat is used to achieve movement of the connecting seat in the receiving direction to solve the problem of terminal wear, but the connecting seat still cannot move perpendicular to the receiving direction, and the poor contact situation is not significantly alleviated. Summary of the invention

[0004] An object of the present invention is to provide an electric tool that can maintain good contact with a power source.

[0005] Another object of the present invention is to provide an electric tool assembly that enables the electric tool to maintain good contact with a power source.

[0006] To achieve this object, on the one hand, the present invention adopts the following technical solutions:

[0007] An electric tool comprises a casing, a connecting seat and an elastic element; the connecting seat is used to receive a battery pack and electrically connect the battery pack and the electric tool, the connecting seat is movably connected to the casing through the elastic element, the elastic element can at least generate a force in a direction inclined relative to the receiving direction to make the connecting seat contact with the battery pack, and the connecting seat can move in the receiving direction of the battery pack and in a direction perpendicular to the receiving direction.

[0008] Furthermore, the elastic element is arranged obliquely relative to the receiving direction.

[0009] Further, a protrusion is provided on the connecting seat along the receiving direction of the battery pack, and the protrusion is used to cooperate with the groove on the battery pack; or, a groove is provided on the connecting seat along the receiving direction of the battery pack, and the groove on the connecting seat is used to cooperate with the protrusion on the battery pack.

[0010] Furthermore, a limiting groove is provided on the housing, and the connecting seat is accommodated in the limiting groove and can move within the space defined by the limiting groove.

[0011] Furthermore, the elastic element is a spring.

[0012] Furthermore, the spring is a coil spring.

[0013] Furthermore, a mounting post is provided on the outer wall of the connecting base or on the housing, the mounting post is inclined relative to the receiving direction of the battery pack, and the spring is sleeved on the mounting post.

[0014] Furthermore, the electric tool is a handheld electric tool.

[0015] On the other hand, the present invention adopts the following technical solutions:

[0016] An electric tool assembly comprises a power source and any one of the above-mentioned electric tools, wherein the power source can be electrically connected to the connecting socket.

[0017] Furthermore, one of the connecting socket and the power supply is provided with a groove along the receiving direction of the power supply, and the other is provided with a protrusion matching the groove.

[0018] Furthermore, a locking mechanism is included, and the power source can be locked on the power tool through the locking mechanism.

[0019] The beneficial effects of the present invention are as follows:

[0020] The electric tool and electric tool assembly of the present invention, wherein the connecting seat is movably connected to the casing by an elastic element which is arranged obliquely relative to the receiving direction of the power supply. When the electric tool works under harsh working conditions such as large amplitude, the elastic element can enable the connecting seat to move in the receiving direction of the power supply and in a direction perpendicular to the receiving direction of the power supply, so that the connecting piece of the connecting seat and the terminal of the power supply always maintain good contact, ensuring that the electric tool can always work normally, and avoiding the problem of wear of the terminals and the connecting piece caused by severe vibration of the electric tool, and the service life of the electric tool and the power supply are both longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of an electric tool assembly provided by an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of an electric tool provided by an embodiment of the present invention;

[0023] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0024] Figure 4 This is one of the structural schematic diagrams before the battery pack and the connecting base are connected in an embodiment of the present invention;

[0025] Figure 5 This is the second structural schematic diagram of the battery pack and the connecting base provided by the embodiment of the present invention before being connected;

[0026] Figure 6 It is a schematic structural diagram of a battery pack provided by an embodiment of the present invention after being connected to a connecting base.

[0027] 1. Power tools; 2. Battery pack;

[0028] 11. housing; 12. connection seat; 13. elastic element; 14. limiting groove; 15. mounting column; 16. protrusion;

[0029] 21. Groove. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0031] This embodiment provides a power tool assembly, such as Figure 1 As shown, it includes an electric tool 1 and a power source. The electric tool 1 is preferably, but not limited to, a handheld electric tool, especially a handheld DC electric tool, such as an impact drill or an impact wrench; the power source is preferably, but not limited to, a battery pack 2. The battery pack 2 can be locked on the electric tool 1 by a locking mechanism.

[0032] like Figure 2 and Figure 3 As shown, the electric tool 1 includes a housing 11, a connection base 12 and an elastic element 13. The connection base 12 is movably connected to the housing 11 through the elastic element 13. The connection base 12 is used to receive the battery pack 2 and electrically connect the battery pack 2 to the electric tool 1. The elastic element 13 can at least generate a force in a direction inclined relative to the receiving direction of the battery pack to make the connection base 12 contact the battery pack 2. Specifically, the elastic element 13 is arranged to be inclined relative to the receiving direction of the battery pack 2. Figure 2The straight line with an arrow in the figure indicates the receiving direction of the battery pack 2. The receiving direction refers to the extension direction of the connecting structure on the connecting seat 12 when the battery pack 2 is not inserted into the power tool 1 or the battery pack 2 is inserted but the power tool 1 is not working. The connecting structure is used to electrically connect to the terminal of the battery pack 2, and it is preferably a connecting sheet. Such an arrangement enables the connecting seat 12 to move simultaneously in the receiving direction of the battery pack 2 and in a direction perpendicular to the receiving direction of the battery pack 2, thereby solving the problem of poor contact and wear between the battery pack and the connecting seat. The elastic element 13 is preferably, but not limited to, a spring, and is particularly preferably a coil spring. After the battery pack 2 is locked to the housing 11 of the power tool 1, the elastic element 13 is preferably always in a compressed state.

[0033] Since the elastic element 13 is tilted relative to the receiving direction of the battery pack 2, when the power tool 1 works under harsh working conditions such as large amplitude, the elastic element 13 can provide elastic force to enable the connecting seat 12 to move in the receiving direction and in a direction perpendicular to the receiving direction, so that the connecting piece of the connecting seat 12 always maintains good contact with the terminal of the battery pack 2 and avoids wear of the terminal and the connecting piece.

[0034] Please continue reading Figure 3 The housing 11 is provided with a limiting groove 14, and the connecting seat 12 is accommodated in the limiting groove 14 and can move within the space defined by the limiting groove 14. The limiting groove 14 can make the overall structure more compact, and the size of the limiting groove 14 can be specifically set according to the vibration of the power tool 1. In order to facilitate the positioning and installation of the spring, please continue to refer to Figures 3 to 6 , a mounting post 15 is provided on the outer wall of the connection base 12, the mounting post 15 is arranged obliquely relative to the receiving direction of the battery pack 2, and the spring is sleeved on the mounting post 15. It is understood that the inclination direction of the mounting post 15 is consistent with the inclination direction of the initial state of the spring when the power tool 1 is not installed with the battery pack 2. It is understood that in other embodiments, the mounting post 15 can also be provided on the inner wall of the housing 11 at the same time or only.

[0035] Please continue reading Figures 3 to 6 ,in Figure 4 and Figure 5 It is a schematic diagram of the structure before the battery pack 2 and the connecting seat 12 are connected. Figure 6 Schematic diagram of the structure after the battery pack 2 is connected to the connection base 12. In order to further ensure the close contact between the connection base 12 and the terminals of the battery pack 2, a protrusion 16 is provided on the connection base 12 along the receiving direction of the battery pack 2, and a groove 21 for inserting the protrusion 16 is provided on the battery pack 2; Figure 6, the protrusion 16 has been inserted into the groove 21, and the protrusion 16 and the groove 21 are blocked by the connecting seat 12 and are not visible. The groove 21 is formed by the inward depression of the top of the battery pack 2 shell and extends to the free end of the battery pack 2 shell. The outer contour of the protrusion 16 is preferably matched with the inner contour of the groove 21, and the elastic force of the spring can make the protrusion 16 and the groove 21 in close contact, thereby ensuring the close contact between the connecting piece of the connecting seat 12 and the terminal of the battery pack 2. The protrusion 16 and the groove 21 can also play a guiding role to facilitate the installation of the battery pack 2. It should be noted that in other embodiments, it is also possible to simultaneously or only set a groove on the connecting seat 12 along the receiving direction of the battery pack 2, and set a protrusion on the battery pack 2 that matches the groove on the connecting seat 12. The groove on the connecting seat 12 can be set with reference to the groove 21 on the battery pack 2.

[0036] The working principles of the electric tool 1 and the electric tool assembly provided in this embodiment are briefly introduced below.

[0037] The battery pack 2 is electrically connected to the connection base 12 and the battery pack 2 is locked to the housing 11 of the power tool 1. The elastic element 13 is squeezed to provide an elastic force to the connection base 12 that is inclined relative to the receiving direction of the battery pack 2. When the power tool 1 works under harsh working conditions such as large amplitude, the elastic force can enable the connection base 12 to move in the receiving direction of the battery pack 2 and in a direction perpendicular to the receiving direction of the battery pack 2, so that the connection piece of the connection base 12 and the terminal of the battery pack 2 always maintain good contact, ensuring that the power tool 1 can always work normally, and avoiding the problem of wear of the terminal and the connection piece caused by the severe vibration of the power tool 1, and the service life of the power tool and the battery pack 2 is longer.

[0038] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. An electric tool comprising chassis; A connecting seat, the connecting seat is used to receive the battery pack and electrically connect the battery pack and the electric tool, and the connecting seat can move in a receiving direction of the battery pack and in a direction perpendicular to the receiving direction; as well as An elastic element, wherein the connecting seat is movably connected to the housing through the elastic element, and the elastic element can at least generate a force in a direction inclined relative to the receiving direction to make the connecting seat contact with the battery pack.

2. The electric tool according to claim 1, characterized in that: The connection seat is provided with a protrusion along the receiving direction of the battery pack, and the protrusion is used to cooperate with the groove on the battery pack; or, The connection base is provided with a groove along the receiving direction of the battery pack, and the groove on the connection base is used to cooperate with the protrusion on the battery pack.

3. The electric tool according to claim 1, characterized in that: The housing is provided with a limiting groove, and the connecting seat is accommodated in the limiting groove and can move within the space defined by the limiting groove.

4. The electric tool according to claim 1, characterized in that: The elastic element is a spring.

5. The electric tool according to claim 4, characterized in that: A mounting column is provided on the outer wall of the connecting base or on the housing. The mounting post is arranged obliquely relative to the receiving direction of the battery pack. The spring is sleeved on the mounting post.

6. The electric tool according to claim 1, characterized in that: The elastic element is arranged obliquely relative to the receiving direction.

7. The electric tool according to any one of claims 1 to 6, characterized in that: The electric tool is a handheld electric tool.

8. An electric tool assembly, characterized in that: It comprises a battery pack and the electric tool according to any one of claims 1 to 7, wherein the battery pack can be electrically connected to the connecting seat.

9. The electric tool assembly according to claim 8, characterized in that: One of the connecting seat and the battery pack is provided with a groove along the receiving direction of the power source, and the other is provided with a protrusion matching the groove.

10. The electric tool assembly according to any one of claims 8 to 9, characterized in that: A locking mechanism is also included, and the battery pack can be locked on the power tool through the locking mechanism.

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