Shell assembly structure of an electric shovel
Patent Information
- Application Number
- CN202522436609.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-17
AI Technical Summary
[0004]现有专利中用于供连接左、右两个侧盖板的螺丝插入的通孔是设置在侧盖板的外侧表面上的，整个壳体组装成形后该通孔的孔口外露在壳体左右两侧面的一侧上，影响壳体侧面的美观度，并且会增加壳体外部的螺钉数量，给使用者感观较差
[0016]与现有技术相比，本实用新型的优点是在左边罩的顶部与右边罩的顶部之间以及左边罩的底部与右边罩的底部之间均设置用于两者连接的连接组件，连接组件包括相对设置的第一连接部和第二连接部，第一连接部上开设有用于与螺钉螺纹连接的第一螺纹孔，第二连接部上开设有供螺钉穿过的第一通孔，左边罩和右边罩之间通过穿过第一通孔且与第一螺纹孔配合的螺钉相互连接，顶罩装于左边罩和右边罩的上方并遮盖位于顶部的连接组件，电机壳装于左边罩和右边罩下方并罩盖位于底部的连接组件，通过在左边罩的顶部与右边罩的顶部之间以及左边罩的底部与右边罩的底部之间设置连接组件，使得无需在左边罩或右边罩的外侧表面上开设供螺钉插入的孔，由于连接组件设置在顶部和底部，在顶罩和电机壳装上时会对连接组件形成遮蔽，左边罩和右边罩隐藏式螺钉设计，使得壳体左右两侧表面上均无螺钉裸露，提升了外观的美观度，且减少壳体上裸露的螺钉数量。
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Figure CN224826426U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an electric pick, and more particularly to a housing assembly structure for an electric pick. Background Technology
[0002] An electric hammer is a widely used power tool. It's based on an electric drill, but with the addition of a piston driven by an electric motor and connected to a crankshaft. This piston compresses air reciprocally within a cylinder, causing periodic changes in air pressure. These changing air pressures drive a hammer within the cylinder to repeatedly strike the top of the drill bit, essentially striking the drill bit with a hammer, hence the name "electric hammer." The electric hammer consists of a housing containing a gearbox and a motor. The gearbox houses a transmission mechanism, and the motor is connected to this transmission mechanism.
[0003] For example, patent CN116494185B discloses an electric pick with dustproof and cooling functions, which includes a housing, a mounting handle mounted on the rear side of the housing, and a gearbox. The housing includes a top cover plate, left and right side cover plates, a motor housing for mounting a motor, a bottom cover, and a rear cover. The left and right side cover plates are located on the left and right sides of the gearbox and are connected to each other by screws. The top cover plate and the motor housing are mounted on the upper and lower sides of the gearbox by screws, respectively. The rear cover is mounted on the rear of the gearbox by screws, and the bottom cover is mounted on the bottom of the motor housing by screws. The mounting handle is located on the rear side of the rear cover. A front cylinder is fixed on the front side of the gearbox and extends out of the housing.
[0004] In existing patents, the through holes for screws to connect the left and right side covers are set on the outer surface of the side covers. After the entire housing is assembled, the opening of the through hole is exposed on one side of the left and right sides of the housing, which affects the aesthetics of the side of the housing and increases the number of screws on the outside of the housing, resulting in a poor user experience. Utility Model Content
[0005] Based on the fact that the through holes for screws to be inserted into the left and right side covers are set on the outer surface of the side covers, after the two side covers, top cover, motor housing, bottom cover and rear cover are assembled into a housing, the through holes on the outer surface of the side covers are exposed to the outside, which makes the side of the housing look less beautiful and increases the number of exposed screws on the housing. Therefore, this utility model provides a housing assembly structure for an electric pickaxe.
[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows: The housing assembly structure of the electric hammer includes a housing, a gearbox, and a front cylinder. The gearbox is installed inside the housing, and the front cylinder is fixed to the front part of the gearbox. The front part of the housing has a front opening, and the front cylinder extends out of the housing through the front opening. The housing includes a left side cover, a right side cover, a top cover, a rear cover, and a motor housing for accommodating the motor. Connecting components for connecting the top of the left side cover and the top of the right side cover, as well as between the bottom of the left side cover and the bottom of the right side cover, are provided. The connecting components include components arranged opposite to each other. The first connecting part has a first threaded hole for threaded connection with a screw, and the second connecting part has a first through hole for the screw to pass through. The left and right covers are connected to each other by a screw that passes through the first through hole and is threaded into the first threaded hole. The left and right covers form a cavity for accommodating the gearbox. The top cover is mounted above the left and right covers and covers the connecting components located at the top. The motor housing is mounted below the left and right covers and covers the connecting components located at the bottom. The rear cover is mounted behind the left and right covers.
[0007] A further preferred embodiment of this utility model is as follows: the left cover includes a left cover plate and a left clamping edge fixed to the front of the left cover plate; the right cover includes a right cover plate and a right clamping edge fixed to the front of the right cover plate; when the left and right covers are connected by screws, the left and right clamping edges are joined together to form a collar that fits around the outside of the front cylinder; the left and right cover plates surround the left and right sides of the gearbox; a top opening of a cavity is formed between the tops of the left and right cover plates; a bottom opening of a cavity is formed between the bottoms of the left and right cover plates; a rear opening of a cavity is formed between the rear parts of the left and right cover plates; the top cover covers the top opening; the motor housing covers the bottom opening; and the rear cover covers the rear opening.
[0008] A further preferred technical solution of this utility model is as follows: the first connecting part is a first connecting post, the second connecting part is a second connecting post, a first threaded hole is provided on the end face of the first connecting post facing the second connecting post, a first through hole is provided on the second connecting post, an annular step is provided in the first through hole, and the end of the first connecting post with the opening of the first threaded hole is inserted into the first through hole and abuts against the annular step.
[0009] A further preferred embodiment of this utility model is as follows: the top of the left cover and the top of the right cover are provided with positioning protrusions around the top opening, the top cover is provided with positioning grooves that cooperate with the positioning protrusions, the positioning protrusions are inserted into the positioning grooves, and the connecting component at the top is provided on the inner side of the positioning protrusions.
[0010] A further preferred embodiment of this utility model is as follows: the bottom of the left cover and the bottom of the right cover are provided with a first flat edge around the bottom opening, and the top edge of the motor housing is provided with a second flat edge corresponding to the first flat edge. The first flat edge and the second flat edge are in surface-to-surface contact, and the connecting component located at the bottom is provided on the inner side of the first flat edge.
[0011] A further preferred embodiment of this utility model is as follows: a first connecting part is provided on the top and bottom of the left clamping edge, and a second connecting part is provided on the top and bottom of the right clamping edge respectively.
[0012] A further preferred embodiment of this utility model is as follows: the top cover has a second through hole with an upward opening, a screw for connecting to the gearbox is inserted through the second through hole, and a first insert and a first slot are provided between the top cover and the gearbox for insertion and engagement.
[0013] A further preferred embodiment of this utility model is as follows: the bottom of the gearbox has an opening, and a middle cover is provided at the opening. The middle cover is connected to the gearbox by screws. The front, middle and rear parts of the motor housing are respectively provided with a front through hole, a middle through hole and a rear through hole with downward openings. Screws for connecting to the middle cover or the gearbox are inserted in the front through hole, the middle through hole and the rear through hole. The housing includes a bottom cover, which is installed at the bottom of the motor housing and covers the middle through hole. The rear cover is installed behind the motor housing, the left cover and the right cover and covers the rear through hole.
[0014] A further preferred technical solution of this utility model is as follows: a third through hole with an opening facing downward is provided on the bottom surface of the bottom cover, and a screw connected to the motor housing is inserted in the third through hole; a fourth through hole with an opening facing backward is provided on the rear cover, and a screw connected to the motor housing or gearbox is inserted in the fourth through hole.
[0015] A further preferred embodiment of this utility model is as follows: a second plug and a second slot are provided between the middle cover and the motor housing for plug-in cooperation; a third plug and a third slot are provided between the bottom cover and the motor housing for plug-in cooperation; and a fourth plug and a fourth slot are provided between the rear cover and the gearbox or the motor housing for plug-in cooperation.
[0016] Compared with the prior art, the advantage of this utility model is that connecting components for connecting the top of the left cover and the top of the right cover, as well as between the bottom of the left cover and the bottom of the right cover, are provided. The connecting components include a first connecting part and a second connecting part arranged opposite to each other. The first connecting part has a first threaded hole for threaded connection with a screw, and the second connecting part has a first through hole for the screw to pass through. The left cover and the right cover are connected to each other by a screw that passes through the first through hole and mates with the first threaded hole. The top cover is installed above the left cover and the right cover and covers the connecting components located at the top. The motor housing is installed below the left cover and the right cover and covers the connecting components located at the bottom. By providing connecting components between the top of the left cover and the top of the right cover, as well as between the bottom of the left cover and the bottom of the right cover, it is not necessary to open holes for screw insertion on the outer surface of the left cover or the right cover. Since the connecting components are located at the top and bottom, they will be shielded when the top cover and the motor housing are installed. The hidden screw design of the left cover and the right cover means that there are no exposed screws on the left and right sides of the housing, which improves the aesthetics of the appearance and reduces the number of exposed screws on the housing. Attached Figure Description
[0017] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.
[0018] Figure 1 This is a schematic diagram of the left side of an electric pick. Figure 2 This is a schematic diagram of the right side of an electric pick. Figure 3 This is a cross-sectional diagram of an electric pick. Figure 4 for Figure 3 A magnified view of part A; Figure 5 for Figure 3 A magnified view of section B; Figure 6 This is a schematic diagram showing the rear cover separating from the housing; Figure 7 This is a schematic diagram showing the bottom cover separating from the motor housing; Figure 8 A schematic diagram showing the separation of the motor housing from the bottom of the left and right side covers; Figure 9 A schematic diagram showing the separation of the top cover from the top of the left and right covers; Figure 10This is a schematic diagram showing the left and right side covers separated from the gearbox. Figure 11 This is a schematic diagram showing the combination of the left and right side covers. Figure 12 This is a schematic diagram of the left side cover. Figure 13 This is a schematic diagram of the right side cover. Figure 14 A schematic diagram of the top cover.
[0019] In the diagram: 1. Housing; 2. Front cylinder; 3. Top cover; 4. Rear cover; 5. Bottom cover; 6. Motor housing; 7. Left side cover; 8. Right side cover; 9. Cylinder; 10. Impact assembly; 11. Intermediate cover; 12. Transmission mechanism; 13. Gearbox; 14. Connecting assembly; 15. Screw; 16. Positioning groove; 17. Positioning protrusion; 18. Collar; 19. Front opening; 20. Fourth insert; 21. Fourth threaded hole; 22. Rear opening; 23. Cavity; 24. Fourth through hole; 25. Third through hole; 26. Third insert; 27. 28. Third threaded hole; 29. Middle through hole; 30. Front through hole; 31. Rear through hole; 32. First flat edge; 33. Bottom opening; 34. Second flat edge; 35. Second through hole; 36. Top opening; 37. Second threaded hole; 38. First insert; 39. First slot; 40. Left cover plate; 41. First connecting part; 42. First threaded hole; 43. Left clamping edge; 44. Right cover plate; 45. First through hole; 46. Right clamping edge; 47. Annular step; 48. Second connecting part; 49. Second slot; 40. Piston. Detailed Implementation
[0020] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.
[0021] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.
[0022] Figures 1-14As shown, the housing assembly structure of the electric pick includes a housing 1, a gearbox 13, and a front cylinder 2. The front cylinder 2 is fixed to the front of the gearbox 13. The front opening 19 is provided at the front of the housing 1. The front cylinder 2 extends out of the housing 1 through the front opening 19. A transmission mechanism 12 is provided inside the gearbox 13. A motor is installed inside the housing 1. A cylinder 9 is installed inside the front cylinder 2. A piston 49 is provided inside the cylinder 9. The transmission mechanism 12 includes a drive gear mounted on the output shaft of the motor and a driven gear rotatably mounted inside the gearbox 13. The drive gear meshes with the driven gear. An eccentric shaft is fixed on the driven gear. A connecting rod is connected to the eccentric shaft. The other end of the connecting rod is connected to the piston 49. The drive gear drives the driven gear to rotate, so that the connecting rod drives the piston 49 to reciprocate within the cylinder 9. The piston 49 compresses air to push the impact assembly 10 to impact the working head, so that the working head can work.
[0023] Figures 1-5 As shown, the housing 1 includes a left side cover 7, a right side cover 8, a top cover 3, a rear cover 4, and a motor housing 6 for accommodating the motor. The motor is installed inside the motor housing 6. Connecting assemblies 14 for connecting the top of the left side cover 7 and the top of the right side cover 8, and between the bottom of the left side cover 7 and the bottom of the right side cover 8, are provided. The connecting assembly 14 includes a first connecting portion 40 and a second connecting portion 47 disposed opposite to each other. The first connecting portion 40 has a first threaded hole 41 for threaded connection with a screw 15, and the second connecting portion 47 has a hole through which the screw 15 passes. The left cover 7 and the right cover 8 are connected to each other by a screw 15 that passes through the first through hole 44 and is threaded into the first threaded hole 41. The left cover 7 and the right cover 8 form a cavity 23 for accommodating the gearbox 13. The gearbox 13 is placed in the cavity 23. The top cover 3 is installed above the left cover 7 and the right cover 8 and covers the connecting assembly 14 located at the top. The motor housing 6 is installed below the left cover 7 and the right cover 8 and covers the connecting assembly 14 located at the bottom. The rear cover 4 is installed behind the left cover 7 and the right cover 8.
[0024] By providing connecting components 14 between the top of the left cover 7 and the top of the right cover 8, and between the bottom of the left cover 7 and the bottom of the right cover 8, it is not necessary to open holes for screws 15 to be inserted on the outer surface of the left cover 7 or the right cover 8. Since the connecting components 14 are located at the top and bottom, they will be obscured when the top cover 3 and the motor housing 6 are installed. The hidden screw design of the left cover 7 and the right cover 8 ensures that no screws 15 are exposed on the left and right sides of the housing 1, which improves the aesthetics of the appearance and reduces the number of exposed screws 15 on the housing 1.
[0025] Figures 10-13As shown, the left cover 7 includes a left cover plate 39 and a left clamping edge 42 fixed to the front of the left cover plate 39. The right cover 8 includes a right cover plate 43 and a right clamping edge 45 fixed to the front of the right cover plate 43. When the left cover 7 and the right cover 8 are connected to each other by screws 15, the left clamping edge 42 and the right clamping edge 45 are assembled into a collar 18 that fits over the outside of the front cylinder 2. The left cover plate 39 and the right cover plate 43 surround the left and right sides of the gearbox 13. The collar 18 holds the front cylinder 2, and the left cover 7 and the right cover 8 are installed on the left and right sides of the gearbox 13. The left cover plate 39 and the right cover 8 are fixed to the left and right sides of the gearbox 13. A top opening 35 of cavity 23 is formed between the top of the right cover plate 43, a bottom opening 32 of cavity 23 is formed between the bottom of the left cover plate 39 and the right cover plate 43, and a rear opening 22 of cavity 23 is formed between the rear of the left cover plate 39 and the right cover plate 43. The top cover 3 is mounted above the left cover plate 7 and the right cover plate 8 and covers the top opening 35. The motor housing 6 is mounted below the left cover plate 7 and the right cover plate 8 and covers the bottom opening 32. The rear cover 4 is mounted behind the left cover plate 7 and the right cover plate 8 and covers the rear opening 22, so as to enclose the gearbox 13. The left clamping edge 42 is integrally formed with the left cover plate 39, and the right clamping edge 45 is integrally formed with the right cover plate 43.
[0026] A front opening 19 is formed inside the collar 18 for the front cylinder 2 to pass through.
[0027] Preferably, the top and bottom of the left clamping edge 42 are provided with a first connecting part 40, and the top and bottom of the right clamping edge 45 are provided with a second connecting part 47 respectively.
[0028] The first connecting part 40 is a first connecting post, and the second connecting part 47 is a second connecting post. The first connecting post has a first threaded hole 41 on one end face facing the second connecting post, and the second connecting post has a first through hole 44. The first through hole 44 has an annular step 46. The end of the first connecting post with the opening of the first threaded hole 41 is inserted into the first through hole 44 and abuts against the annular step 46. Through the insertion and engagement of the first connecting part 40 and the second connecting part 47, it is easy for the left cover 7 and the right cover 8 to be assembled and connected by screws 15, so that the left cover 7 and the right cover 8 can be more easily aligned.
[0029] Figure 5 , Figure 8 As shown, the bottom of the left cover 7 and the bottom of the right cover 8 are provided with a first flat edge 31 around the bottom opening 32. The top edge of the motor housing 6 is provided with a second flat edge 33 corresponding to the first flat edge 31. When the motor housing 6 is installed under the left cover 7 and the right cover 8, the first flat edge 31 and the second flat edge 33 are in contact with each other. Through the contact between the first flat edge 31 and the second flat edge 33, the interconnected left cover 7 and right cover 8 can be adjusted.
[0030] The connecting component 14 located at the bottom of the left cover 7 and the right cover 8 is disposed on the inside of the first flat edge 31.
[0031] Figure 4 , Figure 9 , Figure 11 , Figure 14 As shown, the top of the left cover 7 and the top of the right cover 8 are provided with positioning protrusions 17 around the top opening 35. The top cover 3 is provided with positioning grooves 16 that cooperate with the positioning protrusions 17. When the top cover 3 is installed above the left cover 7 and the right cover 8, the positioning protrusions 17 are inserted into the positioning grooves 16 to limit the left cover 7 and the right cover 8 that are connected to each other, so as to prevent the left cover 7 and the right cover 8 from moving relative to the gearbox 13.
[0032] Figure 9 , Figure 14 As shown, the top cover 3 has a second through hole 34 with the opening facing upward. A screw 15 connected to the gearbox 13 passes through the second through hole 34. The top cover 3 and the gearbox 13 are provided with a first insert 37 and a first slot 38 for insertion and engagement. The insertion and engagement of the first insert 37 and the first slot 38 facilitates the positioning and installation of the top cover 3.
[0033] A first insert 37 is provided on one of the top cover 3 and the gearbox 13, and a first slot 38 is provided on the other. When the first insert 37 is located on the inner side of the top cover 3, the corresponding first slot 38 is located on the gearbox 13, and the opening of one end of the second through hole 34 falls on the end face of the first insert 37. A second threaded hole 36 for threaded connection with screw 15 is provided in the first slot 38. When the first insert 37 is located on the gearbox 13, the corresponding first slot 38 is located on the inner side of the top cover 3, and the opening of one end of the second through hole 34 falls in the first slot 38. A second threaded hole 36 for threaded connection with screw 15 is provided on the end face of the first insert 37.
[0034] Figures 6-8 As shown, the bottom of the gearbox 13 has an opening, and a middle cover 11 is placed over the opening. The middle cover 11 is connected to the gearbox 13 by screws 15. The front, middle and rear parts of the motor housing 6 are respectively provided with a front through hole 29, a middle through hole 28 and a rear through hole 30 with downward openings. Screws 15 that are connected to the middle cover 11 or the gearbox 13 are inserted into the front through hole 29, the middle through hole 28 and the rear through hole 30. The housing 1 includes a bottom cover 5, which is installed at the bottom of the motor housing 6 and covers the middle through hole 28. The rear cover 4 is installed behind the motor housing 6, the left side cover 7 and the rear side cover and covers the rear through hole 30, so that the middle through hole 28 and the rear through hole 30 used for connection on the motor housing 6 are covered, reducing the number of exposed screws 15 on the housing 1.
[0035] The bottom surface of the bottom cover 5 is provided with a third through hole 25 with the opening facing downward. A screw 15 connected to the motor housing 6 is inserted through the third through hole 25. The rear cover 4 is provided with a fourth through hole 24 with the opening facing backward. A screw 15 connected to the motor housing 6 or the gearbox 13 is inserted through the fourth through hole 24.
[0036] The middle cover 11 and the motor housing 6 are provided with a second plug and a second slot 48 for plug-in engagement. The plug-in engagement of the second plug and the second slot 48 facilitates the positioning and installation of the motor housing 6. The bottom cover 5 and the motor housing 6 are provided with a third plug and a third slot for plug-in engagement. The plug-in engagement of the third plug and the third slot facilitates the positioning and installation of the bottom cover 5 and the motor housing 6. The rear cover 4 and the gearbox 13 or the motor housing 6 are provided with a fourth plug and a fourth slot for plug-in engagement. The engagement of the fourth plug and the fourth slot enables the rapid positioning and installation of the rear cover 4.
[0037] The top of the motor housing 6 is provided with a second insertion post, which is distributed at the front, middle and rear of the motor housing 6. The openings at the upper ends of the front through hole 29, the middle through hole 28 and the rear through hole 30 fall on the upper end faces of the front second insertion post, the middle second insertion post and the rear second insertion post, respectively. The intermediate cover 11 is provided with a second slot 48 corresponding to the second insertion post. The second slot 48 is provided with a through hole or a fifth threaded hole. When the second slot 48 is a through hole, the gearbox 13 is provided with a fifth threaded hole opposite to the upper end of the through hole. The screw 15 passes through the motor housing 6 and the through hole and is threaded into the fifth threaded hole. When the second slot 48 is a fifth threaded hole, the screw 15 passes through the motor housing 6 and is threaded into the fifth threaded hole.
[0038] The bottom cover 5 has a third slot on its inner side, and the motor housing 6 has a third post 26 corresponding to the third slot on its bottom. The opening at the upper end of the third through hole 25 falls into the third slot, and a third threaded hole 27 is opened on the lower end face of the third post 26.
[0039] Both the gearbox 13 and the motor housing 6 are provided with a fourth post 20. The inner side of the rear cover 4 is provided with a fourth slot corresponding to the fourth post 20. A fourth threaded hole 21 is opened on the end face of the fourth post 20, and one end of the fourth through hole 24 falls into the fourth slot.
[0040] During assembly, first connect the left cover 7 and the right cover 8 to each other with screws 15 so that the left cover 7 and the right cover 8 are installed on the left and right sides of the gearbox 13. Then install the top cover 3, the motor housing 6, the bottom cover 5 and the rear cover 4 in sequence.
[0041] The above describes the housing assembly structure of the electric pickaxe provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from its principle, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A housing assembly structure for an electric jackhammer, comprising a housing, a gearbox, and a front cylinder, wherein the gearbox is housed within the housing, the front cylinder is fixed to the front of the gearbox, the front of the housing has a front opening, and the front cylinder extends out of the housing through the front opening. The housing includes a left side cover, a right side cover, a top cover, a rear cover, and a motor housing for accommodating a motor, characterized in that... Connecting components for connecting the left and right covers are provided between the top of the left cover and the top of the right cover, and between the bottom of the left cover and the bottom of the right cover. The connecting components include a first connecting part and a second connecting part arranged opposite to each other. The first connecting part has a first threaded hole for threaded connection with a screw, and the second connecting part has a first through hole for the screw to pass through. The left and right covers are connected to each other by a screw that passes through the first through hole and is threaded into the first threaded hole. A cavity for accommodating the gearbox is formed between the left and right covers. The top cover is installed above the left and right covers and covers the connecting components located at the top. The motor housing is installed below the left and right covers and covers the connecting components located at the bottom. The rear cover is installed behind the left and right covers.
2. The housing assembly structure of the electric pick as described in claim 1, characterized in that, The left cover includes a left cover plate and a left clamping edge fixed to the front of the left cover plate. The right cover includes a right cover plate and a right clamping edge fixed to the front of the right cover plate. When the left and right covers are connected by screws, the left and right clamping edges are joined together to form a collar that fits over the outside of the front cylinder. The left and right cover plates surround the left and right sides of the gearbox. A top opening of a cavity is formed between the top of the left and right cover plates. A bottom opening of a cavity is formed between the bottom of the left and right cover plates. A rear opening of a cavity is formed between the rear of the left and right cover plates. The top cover covers the top opening, the motor housing covers the bottom opening, and the rear cover covers the rear opening.
3. The housing assembly structure of the electric pick as described in claim 1, characterized in that, The first connecting part is a first connecting post, and the second connecting part is a second connecting post. The first connecting post has a first threaded hole on one end face facing the second connecting post, and the second connecting post has a first through hole. The first through hole has an annular step. The end of the first connecting post with the opening of the first threaded hole is inserted into the first through hole and abuts against the annular step.
4. The housing assembly structure of the electric pickaxe according to claim 2, characterized in that, The top of the left cover and the top of the right cover are provided with positioning protrusions around the top opening. The top cover is provided with positioning grooves that cooperate with the positioning protrusions. The positioning protrusions are inserted into the positioning grooves. The connecting component at the top is located inside the positioning protrusions.
5. The housing assembly structure of the electric pick as described in claim 2, characterized in that, The bottom of the left cover and the bottom of the right cover are provided with a first flat edge around the bottom opening, and the top edge of the motor housing is provided with a second flat edge corresponding to the first flat edge. The first flat edge and the second flat edge are in surface-to-surface contact, and the connecting component at the bottom is provided on the inner side of the first flat edge.
6. The housing assembly structure of the electric pickaxe according to claim 2, 4, or 5, characterized in that, The top and bottom of the left clamping edge are provided with a first connecting part, and the top and bottom of the right clamping edge are provided with a second connecting part respectively.
7. The housing assembly structure of the electric pickaxe according to claim 1 or 2, characterized in that, The top cover has a second through hole with an upward opening, and a screw for connecting to the gearbox is inserted through the second through hole. The top cover and the gearbox are provided with a first insert and a first slot for insertion and engagement.
8. The housing assembly structure of the electric pickaxe according to claim 1 or 2, characterized in that, The gearbox has an opening at its bottom, covered by a middle cover. The middle cover is connected to the gearbox by screws. The motor housing has a front through hole, a middle through hole, and a rear through hole with downward openings at its front, middle, and rear parts, respectively. Screws that connect to the middle cover or the gearbox are inserted into the front through hole, the middle through hole, and the rear through hole. The housing includes a bottom cover, which is installed at the bottom of the motor housing and covers the middle through hole. A rear cover is installed behind the motor housing, the left side cover, and the right side cover and covers the rear through hole.
9. The housing assembly structure of the electric pickaxe according to claim 8, characterized in that, The bottom surface of the base cover has a third through hole with an opening facing downwards, and a screw for connecting to the motor housing is inserted through the third through hole. The rear cover has a fourth through hole with an opening facing backwards, and a screw for connecting to the motor housing or gearbox is inserted through the fourth through hole.
10. The housing assembly structure of the electric pick as described in claim 9, characterized in that, The middle cover is provided with a second plug and a second slot for plug-in engagement between it and the motor housing; the bottom cover is provided with a third plug and a third slot for plug-in engagement between it and the motor housing; and the rear cover is provided with a fourth plug and a fourth slot for plug-in engagement between it and the gearbox or the motor housing.