Battery assembly for coal mine and handheld electric tool

Abstract

The utility model relates to a coal mine battery assembly and hand-held electric tool, the coal mine battery assembly includes: battery case, battery and control panel, the battery case includes box body and cover body, the box body and the cover body are both metal flame-proof structural member, the box body and the cover body are detachably connected and define the flame-proof cavity, the battery case includes the battery case, battery and control panel. The matching position of the box body and the cover body is provided with a first explosion-proof joint face, the battery and the control panel are both arranged in the explosion-proof cavity, and the battery is electrically connected with the control panel. The battery assembly for the coal mine is compact in structure, the weight of the battery assembly for the coal mine can be reduced, and the explosion-proof effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to a battery assembly and a handheld electric tool for coal mines. Background Art

[0002] Explosion-proof handheld power tools are mainly used in flammable and explosive environments such as coal mines to assist workers in bolt assembly, equipment installation and other operations to ensure the safety of personnel. Explosion-proof handheld power tools are tools with a safety protection system specially designed for hazardous environments. While improving the efficiency of workers' underground maintenance and installation operations, they can also effectively prevent the generation of sparks or static electricity, thereby avoiding the detonation of flammable gases or dust. In related technologies, the power supply device of power tools usually does not meet the explosion-proof requirements, and is large in size and weight, which is not conducive to the lightweight design of power tools. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the utility model proposes a battery assembly for coal mines, which has a compact structure, is conducive to reducing the weight of the battery assembly for coal mines, and has a good explosion-proof effect.

[0005] The embodiment of the utility model further provides a handheld electric tool.

[0006] The battery assembly for coal mines of the embodiment of the utility model comprises: a battery box, the battery box comprises a box body and a cover body, the box body and the cover body are both metal explosion-proof structural parts, the box body and the cover body are detachably connected and define an explosion-proof cavity, the matching position of the box body and the cover body has a first explosion-proof joint surface; a battery and a control board, the battery and the control board are both arranged in the explosion-proof cavity, and the battery is electrically connected to the control board.

[0007] According to the battery assembly for coal mines of the embodiment of the utility model, since the box body and the cover body are both metal explosion-proof structural parts, and the box body and the cover body define an explosion-proof cavity, the battery and the control board share one explosion-proof cavity, so the battery assembly for coal mines of the embodiment of the utility model does not need to set different explosion-proof cavities for the battery and the control board, which can make the structure of the battery assembly for coal mines compact, which is conducive to reducing the occupied space of the battery assembly for coal mines, and can make the battery and the control board meet the explosion-proof requirements. Therefore, the battery assembly for coal mines of the embodiment of the utility model has a compact structure, which is conducive to reducing the occupied space and weight of the battery assembly for coal mines, and has a good explosion-proof effect.

[0008] In some embodiments, the battery assembly for coal mines also includes a threading piece and a wire, wherein the threading piece is disposed on the box body, one end of the wire is connected to the battery and the control board, and the other end of the wire passes through the threading piece and is led out of the battery box, and a casting material for fixing the wire is disposed inside the threading piece.

[0009] In some embodiments, the cover body and the box body are threadedly matched, and the first explosion-proof joint surface is a explosion-proof threaded joint surface, the length of the explosion-proof threaded joint surface along the thickness direction of the cover body is A, where A≥8mm; and / or the dimension of the casting material along the length direction of the wire is B, where B≥20mm.

[0010] In some embodiments, the wall thickness of the box body and the wall thickness of the cover body are C, wherein 3mm≤C≤8mm.

[0011] In some embodiments, the box body and the cover body are made of at least one of gray cast iron, carbon structural steel and stainless steel.

[0012] In some embodiments, a mounting hole is provided on the box body, and the mounting hole is connected to the explosion-proof cavity. The battery assembly for coal mine also includes a charging head assembly, and the charging head assembly includes a sealing member and a charging head. The sealing member and at least a part of the charging head are both arranged in the mounting hole, and the charging head is closer to the explosion-proof cavity than the sealing member. The sealing member is detachably connected to the mounting hole, and the outer wall of at least one of the sealing member and the charging head has a second explosion-proof joint surface with the inner wall of the mounting hole.

[0013] In some embodiments, the sealing member is a screw plug, which is threadedly matched with the inner wall of the mounting hole and has the second explosion-proof joint surface; or, the sealing member is a rubber plug, and the outer wall of the charging head and the inner wall of the mounting hole have the second explosion-proof joint surface.

[0014] In some embodiments, an ear seat is provided on a side of the box body facing away from the explosion-proof cavity, and at least two connecting holes are provided on the ear seat.

[0015] A handheld electric tool according to another embodiment of the utility model comprises a battery assembly for coal mining as described in any one of the embodiments of the utility model.

[0016] According to the handheld power tool of the embodiment of the utility model, since the box body and the cover body are both metal explosion-proof structural parts, and the box body and the cover body define an explosion-proof cavity, the battery and the control board share one explosion-proof cavity, so the battery assembly for coal mines of the embodiment of the utility model does not need to set different explosion-proof cavities for the battery and the control board, which can make the structure of the battery assembly for coal mines compact, which is conducive to reducing the occupied space of the battery assembly for coal mines, and can make the battery and the control board meet the explosion-proof requirements. Therefore, the battery assembly for coal mines of the embodiment of the utility model has a compact structure, which is conducive to reducing the occupied space and weight of the battery assembly for coal mines, and has a good explosion-proof effect.

[0017] In some embodiments, the handheld power tool further includes: a shell, the shell is a non-explosion-proof shell, the box body is detachably connected to the shell; a flameproof motor and a clamp, the flameproof motor is disposed in the shell and is transmission-connected to the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an axonometric view of a battery assembly for coal mines according to an embodiment of the utility model.

[0019] Figure 2 It is a top view of a battery assembly for coal mines according to an embodiment of the utility model.

[0020] Figure 3 yes Figure 2 Cross-sectional view of AA.

[0021] Figure 4 yes Figure 2 Cross-section of BB.

[0022] Figure 5 Schematic diagram of a handheld electric tool according to an embodiment of the utility model.

[0023] Figure 6 It is a cross-sectional view of a handheld electric tool according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] 1. battery box; 11. box body; 111. mounting hole; 112. ear seat; 1121. connection hole; 12. cover body; 13. flameproof cavity; 14. first flameproof joint surface;

[0026] 2.Battery;

[0027] 3. Control panel;

[0028] 4. Threading parts; 41. Casting material;

[0029] 5. Charging head assembly; 51. Charging head; 52. Blocking piece; 53. Second flameproof joint surface;

[0030] 6. Shell;

[0031] 7. Flameproof motor;

[0032] 8. Clamp. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0034] Please refer to the following Figures 1 to 6 The utility model is described in an embodiment of a battery assembly for coal mining and a handheld electric tool.

[0035] like Figures 1 to 6 As shown, a battery assembly for coal mines of an embodiment of the utility model includes: a battery box 1, a battery 2 and a control board 3, the battery box 1 includes a box body 11 and a cover body 12, the box body 11 and the cover body 12 are both metal explosion-proof structural parts, the box body 11 and the cover body 12 are detachably connected and define a explosion-proof cavity 13, the matching position of the box body 11 and the cover body 12 has a first explosion-proof joint surface 14, the battery 2 and the control board 3 are both arranged in the explosion-proof cavity 13, and the battery 2 is electrically connected to the control board 3.

[0036] According to the battery assembly for coal mines of the embodiment of the utility model, since the box body 11 and the cover body 12 are both metal explosion-proof structural parts, and the box body 11 and the cover body 12 define an explosion-proof cavity 13, the battery 2 and the control board 3 share one explosion-proof cavity 13, so the battery assembly for coal mines of the embodiment of the utility model does not need to set different explosion-proof cavities 13 for the battery 2 and the control board 3, which can make the structure of the battery assembly for coal mines compact, which is conducive to reducing the occupied space of the battery assembly for coal mines, and can make the battery 2 and the control board 3 meet the explosion-proof requirements. Therefore, the battery assembly for coal mines of the embodiment of the utility model has a compact structure, which is conducive to reducing the occupied space and weight of the battery assembly for coal mines, and has a good explosion-proof effect.

[0037] It is understandable that the mass of explosion-proof structural parts is relatively large. In the related art, structures such as heat dissipation devices, motors, and battery assemblies for coal mines are integrated in a large explosion-proof space. Since some parts do not need to be explosion-proof, the overall weight and size of the power tool are relatively large, which is not convenient for operators to hold. The battery assembly for coal mines in the embodiment of the utility model specifically integrates the battery 2 and the control board 3 in an explosion-proof chamber 13, which can not only meet the explosion-proof requirements of the battery 2 and the control board 3, but also help to reduce the total weight of the power tool.

[0038] In some embodiments, Figure 3 and Figure 4As shown, the battery assembly for coal mines also includes a threading member 4 and a wire (not shown). The threading member 4 is provided on the box body 11. One end of the wire is connected to the battery 2 and the control board 3. The other end of the wire passes through the threading member 4 and is led out of the battery box 1. A casting material 41 for fixing the wire is provided in the threading member 4. It can be understood that the wire is passed out of the battery box 1 by casting, thereby improving the sealing of the explosion-proof cavity 13 and the explosion-proof effect of the battery box 1.

[0039] For example, the dimension of the potting material 41 along the length direction of the wire is B, where B≥20 mm, thereby further improving the explosion-proof reliability of the battery box 1 .

[0040] Optionally, the cover body 12 and the box body 11 are threadedly matched, and the first explosion-proof joint surface 14 is an explosion-proof threaded joint surface, and the length of the explosion-proof threaded joint surface along the thickness direction of the cover body 12 is A, wherein A ≥ 8 mm. It can be understood that the cover body 12 and the box body 11 of the battery box 1 of the utility model do not require external fasteners for fixation, and the cover body 12 and the box body 11 can complete the fixation of the cover body 12 and the box body 11 through their own threaded matching surfaces, thereby reducing the number of parts of the battery assembly for coal mines and facilitating assembly. In addition, by limiting the length of the explosion-proof threaded joint surface along the thickness direction of the cover body 12 to be greater than or equal to 8 mm, the explosion-proof specification requirements of the battery box 1 can be met, and the reliability of the explosion-proof of the battery box 1 can be ensured.

[0041] In the example of this application, Figure 3 As shown, there are two cover bodies 12, both of which are arranged at the lower end of the box body 11, one of the cover bodies 12 corresponds to the battery 2, and the other cover body 12 corresponds to the control board 3. It can be understood that the two cover bodies 12 are arranged at intervals at the lower end of the box body 11 and are both threadedly matched with the box body 11, thereby facilitating the operator to repair and replace the battery 2 and the control board 3 of the battery assembly for coal mines.

[0042] Optionally, the wall thickness of the box body 11 and the wall thickness of the cover body 12 are C, where 3mm≤C≤8mm. For example, the material of the box body 11 and the cover body 12 is at least one of gray cast iron, carbon structural steel and stainless steel. It is understandable that since the box body 11 and the cover body 12 are explosion-proof metal structural parts, when the wall thickness of the box body 11 and the cover body 12 is large, the weight of the battery box 1 will be large, which is not conducive to the holding of the power tool. When the wall thickness of the box body 11 and the cover body 12 is small, the explosion-proof effect of the battery box 1 will be reduced. Therefore, the inventor of the present application found through experimental research that when the wall thickness C is between 3mm-8mm, it can not only ensure the explosion-proof effect of the battery box 1, but also reduce the weight of the battery assembly for coal mines, thereby realizing the lightweight design of the handheld power tool.

[0043] In some embodiments, Figure 4As shown, the box body 11 is provided with a mounting hole 111, and the mounting hole 111 is connected to the flameproof cavity 13. The battery assembly for coal mines also includes a charging head 51 assembly 5, and the charging head 51 assembly 5 includes a blocking member 52 and a charging head 51. The blocking member 52 and at least part of the charging head 51 are both arranged in the mounting hole 111. The charging head 51 is closer to the flameproof cavity 13 than the blocking member 52. The blocking member 52 is detachably connected to the mounting hole 111, and the outer wall of at least one of the blocking member 52 and the charging head 51 and the inner wall of the mounting hole 111 have a second flameproof joint surface 53. It can be understood that there is also a flameproof joint surface between the charging head 51 assembly 5 and the mounting hole 111 to improve the flameproof effect of the battery assembly for coal mines.

[0044] In addition, since the blocking member 52 is detachably connected, when the operator needs to charge the battery assembly for coal mine, the blocking member 52 can be removed from the mounting hole 111 so as to insert the charging plug into the charging head 51 for charging. After charging is completed, the blocking member 52 can be installed in the charging head 51, thereby preventing dust and other impurities from entering the charging head 51 and achieving a certain explosion-proof effect.

[0045] For example, Figure 4 As shown, the sealing member 52 is a screw plug, which is threadedly matched with the inner wall of the mounting hole 111 and has a second explosion-proof joint surface 53, thereby preventing dust and other impurities from entering the charging head 51 and achieving a certain explosion-proof effect.

[0046] For another example, the blocking member 52 is a rubber plug (not shown), and the outer wall of the charging head 51 and the inner wall of the mounting hole 111 have a second flameproof joint surface 53. It is understandable that since the charging head 51 and the inner wall of the mounting hole 111 have a flameproof joint surface, the position of the blocking member 52 does not need to be flameproofed, so the blocking member 52 can be sealed with a rubber plug, so that the operator can install and remove the blocking member 52 by hand, which is more practical.

[0047] Alternatively, if Figures 1 to 4 As shown, an ear seat 112 is provided on the side of the box body 11 away from the flameproof chamber 13, and at least two connection holes 1121 are provided on the ear seat 112. For example, there are two ear seats 112, and the two ear seats 112 are arranged on the box body 11 at intervals, and two connection holes 1121 are arranged up and down on the two ear seats 112. It can be understood that the housing 6 of the power tool can be connected to the ear seat 112 to integrate the battery assembly for coal mining on the power tool, thereby avoiding directly drilling holes on the wall surface of the battery box 1, and improving the firmness of the installation of the housing 6 and the battery assembly for coal mining.

[0048] like Figure 5 and Figure 6As shown, a handheld power tool of another embodiment of the utility model comprises a battery assembly for coal mines of any one of the utility models. The technical advantages of the handheld power tool of the embodiment of the utility model are the same as the technical advantages of the battery assembly for coal mines of the above-mentioned embodiment, which will not be repeated here.

[0049] Furthermore, the handheld power tool also includes a housing 6 , a flameproof motor 7 and a clamp 8 , the housing 6 is a non-flameproof housing, the box body 11 is detachably connected to the housing 6 , and the flameproof motor 7 is disposed in the housing 6 and is transmission-connected to the clamp 8 .

[0050] It is understandable that the handheld power tool adopts a flameproof motor 7, so there is no need to set a separate flameproof shell on the outside of the motor, and because the outer shell 6 is a non-flameproof shell, the outer shell 6 can be made of lightweight materials such as plastic to make the handheld power tool lighter.

[0051] The fixture 8 further includes a reducer, which is connected to the output shaft of the flameproof motor 7 by transmission, and the fixture 8 can be a fixture 8 in the prior art. For example, the clamping part of the fixture 8 can clamp tools such as drill bits and saw blades. That is, the handheld power tool can be a hand drill, an impact drill, a handheld electric saw, and other power tools. The present application does not specifically limit the specific type of the power tool.

[0052] In the description of the present invention, 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 invention 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 invention.

[0053] 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 the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, 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 one; it can be a mechanical connection, an electrical connection, or communication with each other; 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 the present invention can be understood according to specific circumstances.

[0055] In the present utility model, 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" or "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" or "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.

[0056] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A battery assembly for coal mines, characterized in that: include: A battery box, the battery box comprising a box body and a cover body, the box body and the cover body are both metal explosion-proof structural parts, the box body and the cover body are detachably connected and define an explosion-proof cavity, and the matching position of the box body and the cover body has a first explosion-proof joint surface; A battery and a control board, wherein the battery and the control board are both arranged in the flameproof cavity, and the battery is electrically connected to the control board.

2. The battery assembly for coal mine according to claim 1, characterized in that: The battery assembly for coal mines also includes a threading piece and a wire. The threading piece is arranged on the box body. One end of the wire is connected to the battery and the control board, and the other end of the wire passes through the threading piece and is led out of the battery box. A casting material for fixing the wire is arranged inside the threading piece.

3. The battery assembly for coal mine according to claim 2, characterized in that: The cover body and the box body are threadedly matched, and the first flameproof joint surface is a flameproof thread joint surface, and the length of the flameproof thread joint surface along the thickness direction of the cover body is A, wherein A≥8mm; And / or, a dimension of the casting material along the length direction of the wire is B, wherein B≥20 mm.

4. The battery assembly for coal mine according to claim 1, characterized in that: The wall thickness of the box body and the wall thickness of the cover body are C, wherein 3mm≤C≤8mm.

5. The battery assembly for coal mine according to claim 4, characterized in that: The box body and the cover body are made of one of gray cast iron, carbon structural steel and stainless steel.

6. The battery assembly for coal mine according to claim 1, characterized in that: The box body is provided with a mounting hole, and the mounting hole is communicated with the explosion-proof cavity. The battery assembly for coal mine also includes a charging head assembly, and the charging head assembly includes a sealing member and a charging head. The sealing member and at least a part of the charging head are both arranged in the mounting hole, and the charging head is closer to the explosion-proof cavity than the sealing member. The sealing member is detachably connected to the mounting hole, and the outer wall of at least one of the sealing member and the charging head has a second explosion-proof joint surface with the inner wall of the mounting hole.

7. The battery assembly for coal mine according to claim 6, characterized in that: The blocking member is a screw plug, which is threadably matched with the inner wall of the mounting hole and has the second flameproof joint surface; Alternatively, the sealing member is a rubber plug, and the outer wall of the charging head and the inner wall of the mounting hole have the second explosion-proof joint surface.

8. The battery assembly for coal mine according to claim 5, characterized in that: An ear seat is provided on one side of the box body away from the explosion-proof cavity, and at least two connecting holes are provided on the ear seat.

9. A handheld electric tool, characterized in that: A battery assembly for coal mining comprising any one of claims 1-8.

10. The handheld electric tool according to claim 9, characterized in that: The handheld electric tool further comprises: An outer shell, wherein the outer shell is a non-explosion-proof shell, and the box body is detachably connected to the outer shell; A flameproof motor and a clamp, wherein the flameproof motor is arranged in the housing and is transmission-connected to the clamp.

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