Electrical box assembly and motor

Abstract

The invention provides an electric appliance box assembly and a motor, the electric appliance box assembly comprises an electric appliance box body and an end cover, a first end face of the end cover is detachably connected with a non-shaft extension end of the motor, the electric appliance box body is provided with an opening, and a second end face of the end cover is connected to the opening to seal the opening. An insertion limiting structure and a connection positioning structure are arranged between the second end face of the end cover and the end face of the opening wall body of the electric appliance box body, and the insertion limiting structure is used for limiting circumferential rotation of the end cover relative to the electric appliance box body. And the connection positioning structure is used for positioning the axial displacement of the end cover after the plug-in mounting limiting structure limits the circumferential position of the end cover. According to the invention, the phenomena of infirm connection and poor sealing caused by dislocation during assembly of the connector and the connector are effectively prevented, so that the problems of exposure of internal elements or poor contact of the connector caused by poor sealing, and potential safety hazards caused by short circuit or damage of electric appliance elements are effectively avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of motor design, and in particular relates to an electrical box assembly and a motor. Background Art

[0002] The combined design of the end cap and electrical box plays a crucial role in any device. The end cap seals the opening of the electrical box, protecting the internal components from environmental influences. Traditional installation methods often present risks of installation errors, safety hazards, and maintenance difficulties.

[0003] Specifically, since the structural design of the end cover and the electrical box lacks the necessary installation alignment structure, the connection structure between the end cover and the electrical box is inaccurately aligned, resulting in improper assembly and the end cover position is not reliably fixed and may shift, thereby affecting the sealing performance of the electrical box, exposing internal components or poor contact of connectors; poor sealing may also cause dust, moisture or liquid to enter the interior of the electrical box, causing short circuits or component damage, increasing safety hazards; when maintaining or replacing the end cover, the lack of a clear guide structure may make it difficult for operators to quickly and accurately complete the disassembly and assembly of the end cover, affecting maintenance efficiency. Summary of the Invention

[0004] Therefore, the present invention provides an electrical box assembly and a motor, which can overcome the technical problems that the electrical box assembly in the related art lacks an assembly limiting structure between the end cover and the electrical box body, resulting in misalignment and loose connection between the end cover and the electrical box body during assembly, poor sealing, exposure of internal components or poor contact of connectors, safety hazards caused by short circuit or damage of electrical components, and low disassembly and maintenance efficiency.

[0005] In order to solve the above problems, the present invention provides an electrical box assembly, including an electrical box body and an end cover, the first end face of the end cover is detachably connected to the non-axial extension end of the motor, the electrical box body has an opening, the second end face of the end cover is connected to the opening to close the opening, and an insertion limiting structure and a connection positioning structure are provided between the second end face of the end cover and the end face of the opening wall of the electrical box body, wherein the insertion limiting structure is used to limit the circumferential rotation of the end cover relative to the electrical box body, and the connection positioning structure is used to position the axial displacement of the end cover after the insertion limiting structure limits the circumferential position of the end cover.

[0006] In some embodiments, the insertion limiting structure includes a card slot on the end face of the opening wall of the electrical box body and a card hook on the second end face of the end cover, the card hook is inserted into the card slot, and the insertion limiting structure has at least two groups, and each group of the insertion limiting structures is evenly spaced around the opening; and / or, the connection positioning structure includes a connecting through hole on the end face of the opening wall of the electrical box body, a threaded hole on the end cover, and a screw that can pass through the connecting through hole and be threadedly connected to the threaded hole.

[0007] In some embodiments, a plurality of mounting seats are formed on the bottom wall of the electrical box body, a circuit board is provided in the electrical box body, and the circuit board is supported and assembled on each of the mounting seats.

[0008] In some embodiments, the circuit board has a rectifier module, which is a flat structure, and the side surface of the flat structure where the thickness is located is parallel to and electrically connected to the board surface of the circuit board.

[0009] In some embodiments, a wire outlet clamp is assembled on the vertical wall of the electrical box body, and the wire outlet clamp has an outer wall on the outside of the vertical wall, an inner wall on the inside of the vertical wall, and a connecting wall connected to the corresponding ends of the outer wall and the inner wall. The outer wall, the connecting wall and the inner wall form an insertion slot, and the wire outlet clamp is mounted on the vertical wall of the electrical box body through the insertion slot.

[0010] In some embodiments, a side of the inner wall close to the bottom wall of the electrical box body has a limiting arm, and the limiting arm and the vertical wall of the electrical box body clamp the two opposite side surfaces of the rectifier module.

[0011] In some embodiments, the limiting arms include two arms that are spaced apart from each other, and the two limiting arms are located on both sides of the width or length of the rectifier module respectively; and / or the limiting arms are elastic.

[0012] In some embodiments, at least two bosses are formed on the end face of the opening wall of the electrical box body, each of the slots is formed on the side of each of the bosses, and a positioning through hole is formed on the connecting wall, and one of the bosses is inserted through the positioning through hole.

[0013] In some embodiments, heat dissipation fins are formed on the outer end surface of the bottom wall of the electrical box body; and / or the electrical box body is integrally injection-molded using a heat-conducting material.

[0014] The present invention also provides a motor comprising the above-mentioned electrical box assembly.

[0015] The electrical box assembly and motor provided by the present invention have the following beneficial effects:

[0016] An insertion limiting structure and a connection positioning structure are simultaneously provided between the end cover and the electrical box body, wherein the insertion limiting structure is used to form a limited positioning for the circumferential rotational displacement between the end cover and the electrical box body, while the connection positioning structure is used to form a reliable axial connection between the end cover and the electrical box body after the circumferential rotation between the end cover and the electrical box body is limited. In this way, the insertion limiting structure is used to guide the assembly and disassembly between the end cover and the electrical box body, effectively preventing the occurrence of loose connection and poor sealing caused by misalignment during assembly of the two, thereby effectively eliminating the occurrence of safety hazards such as exposure of internal components due to poor sealing or poor contact of connectors, short circuit or damage of electrical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. Those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0018] Figure 1 1 is a schematic axial cross-sectional view of an electrical box assembly according to an embodiment of the present invention, wherein the relevant components of the circuit board are omitted;

[0019] Figure 2 yes Figure 1 A schematic diagram of the axial section of the electrical box body;

[0020] Figure 3 yes Figure 2 A top view of

[0021] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the electrical box body;

[0022] Figure 5 yes Figure 4 A partial enlarged view of point A in the middle;

[0023] Figure 6 yes Figure 1 Schematic diagram of the assembly status of the electrical box and circuit board (and rectifier module);

[0024] Figure 7 yes Figure 1 Schematic diagram of the three-dimensional structure of the outlet clamp;

[0025] Figure 8 yes Figure 1 A front view of the end cap (second end face);

[0026] Figure 9yes Figure 8 A partial enlarged view of point B in the middle;

[0027] Figure 10 yes Figure 2 A schematic diagram of the structure from an upward perspective;

[0028] Figure 11 It is a schematic diagram of the state in which the outlet clamp and the electrical box body in the embodiment of the present invention clamp the rectifier module.

[0029] The accompanying drawings are:

[0030] 1. Electrical box body; 10. Boss; 11. Slot; 12. Connecting hole; 13. Mounting seat; 14. Heat dissipation fin; 2. End cover; 21. Hook; 22. Threaded hole; 23. Bearing chamber; 24. Wire port; 25. End cover connecting hole; 3. Circuit board; 31. Rectifier module; 4. Wire outlet clamp; 40. Insertion slot; 41. Outer wall; 42. Inner wall; 421. Limiting arm; 43. Connecting wall; 44. Wire outlet hole. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0033] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0034] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0035] See also Figures 1 to 11 As shown, according to an embodiment of the present invention, there is provided an electrical box assembly, comprising an electrical box body 1, an end cover 2, a first end surface of the end cover 2 (ie Figure 1 The upper end face in the direction shown) is detachably connected to the non-axial extension end of the motor (specifically through a plurality of end cover connection holes 25 located thereon), the electrical box body 1 has an opening (not marked in the figure), and the second end face of the end cover 2 (that is, Figure 1 The lower end face in the orientation shown) is connected to the opening to close the opening (i.e., seal the opening), and an insertion limiting structure (not labeled in the figure) and a connection positioning structure (not labeled in the figure) are provided between the second end face of the end cover 2 and the end face of the opening wall of the electrical box body 1, wherein the insertion limiting structure is used to limit the circumferential rotation of the end cover 2 relative to the electrical box body 1, and the connection positioning structure is used to position the axial displacement of the end cover 2 after the insertion limiting structure limits the circumferential position of the end cover 2.

[0036] In this technical solution, an insertion limiting structure and a connection positioning structure are simultaneously provided between the end cover 2 and the electrical box body 1, wherein the insertion limiting structure is used to form a limited positioning for the circumferential rotational displacement between the end cover 2 and the electrical box body 1, and the connection positioning structure is used to form a reliable axial connection between the end cover 2 and the electrical box body 1 after the circumferential rotation between the end cover 2 and the electrical box body 1 is limited. In this way, the insertion limiting structure is used to guide the assembly and disassembly between the end cover 2 and the electrical box body 1, effectively preventing the occurrence of loose connection and poor sealing caused by misalignment during assembly of the two, thereby effectively eliminating the occurrence of safety hazards such as exposure of internal components due to poor sealing or poor contact of connectors, short circuit or damage of electrical components.

[0037] It can be understood that the core function of the aforementioned insertion limiting structure is to accurately align the end cover 2 with the electrical box body 1 relative to each other, thereby facilitating the connection and positioning structure to accurately and reliably achieve the axial connection function.

[0038] In a specific embodiment, the insertion limiting structure includes a card slot 11 on the end surface of the opening wall of the electrical box body 1 and a hook 21 on the second end surface of the end cover 2, the hook 21 is inserted into the card slot 11, and the insertion limiting structure has at least two groups, and each group of the insertion limiting structures is evenly spaced around the opening, such as Figure 1 In a specific embodiment shown, four groups of the aforementioned insertion and limiting structures are provided.

[0039] The connection and positioning structure includes a connection through hole 12 on the end surface of the opening wall of the electrical box body 1, a threaded hole 22 on the end cover 2, and a screw (not shown in the figure) that can pass through the connection through hole 12 and be threadedly connected to the threaded hole 22. That is, after the aforementioned groups of hooks 21 and slots 11 are axially inserted and circumferentially screwed into place, the positions of the aforementioned threaded holes 22 and the connection through holes 12 correspond one to one. At this time, the corresponding screws are screwed into the corresponding threaded holes 22 through the connection through holes 12 to complete the quick and reliable axial positioning connection between the electrical box body 1 and the end cover 2.

[0040] See Figure 6 As shown, in some embodiments, a plurality of mounting seats 13 are formed on the bottom wall of the electrical box body 1, and the plurality of mounting seats 13 are preferably evenly distributed on the bottom wall of the electrical box body 1. A circuit board 3 is provided in the electrical box body 1, and the circuit board 3 is supported and assembled on each of the mounting seats 13. It can be understood that the contact position between the aforementioned mounting seat 13 and the circuit board 3 should be subjected to necessary insulation treatment. As a conventional design in the industry, it will not be elaborated here.

[0041] In this technical solution, a plurality of mounting seats 13 are provided on the bottom wall of the electrical box body 1 so as to realize the free installation of the circuit board 3, so that the upper and lower surfaces of the circuit board 3 (with Figure 6 The orientation shown is for reference only) can be used to arrange corresponding electrical components, which can reduce the overall footprint of the circuit board 3 and is conducive to the compact design of the electrical box.

[0042] In another preferred embodiment, the aforementioned mounting seats 13 are preferably close to the electrical components with higher heat generation on the circuit board 3, so that the heat of these electrical components can be more efficiently transferred to the electrical box body 1 through the corresponding mounting seats 13 for heat dissipation and cooling.

[0043] In some embodiments, the circuit board 3 has a rectifier module 31, which is a flat structure, and the side of the flat structure where the thickness is located is parallel to the board surface of the circuit board 3 and electrically connected. For details, see Figure 11 As shown, the rectifier module 31 is a plate structure as a whole, and its thickness is much smaller than its width or length. In the conventional technology, the large plane formed by the length and width of the rectifier module 31 is fitted to the surface of the circuit board 3, so that the plane size of the circuit board 3 is correspondingly larger. Correspondingly, the size of the electrical box body 1 is also larger, which is not conducive to the compact design purpose of the motor. In the present invention, the plane fitting assembly method in the aforementioned conventional technology is improved to a vertical assembly method, so that the plane size of the circuit board 3 can be effectively reduced, which is conducive to improving the compact design of the motor.

[0044] See Figure 7 As shown, in some embodiments, a wire outlet clamp 4 is assembled on the vertical wall of the electrical box body 1, and the wire outlet clamp 4 has an outer wall 41 on the outside of the vertical wall, an inner wall 42 on the inner side of the vertical wall, and a connecting wall 43 connected to the corresponding end of the outer wall 41 and the inner wall 42. The outer wall 41, the connecting wall 43 and the inner wall 42 form an insertion slot 40, and the wire outlet clamp 4 is sleeved on the vertical wall of the electrical box body 1 through the insertion slot 40. It can be understood that the outer wall 41 and the inner wall 42 are also provided with a wire outlet hole 44 that passes through the inside and outside of the electrical box body 1. The electrical cables of the aforementioned circuit board 3 are electrically connected to the external device via the wire outlet hole 44, and it can be understood that some cables of the aforementioned circuit board 3 are also electrically connected to the components inside the motor via the wire outlet 24 on the end cover 2.

[0045] In this technical solution, the insertion slot 40 formed by the outer wall 41, the connecting wall 43, and the inner wall 42 of the outlet clamp 4 can be fitted with the vertical wall of the electrical box body 1, so that the position of the outlet clamp 4 is reliable and stable when assembled. During the actual assembly, it can be understood that the connecting wall 43 of the outlet clamp 4 will be clamped by both the end cover 2 and the electrical box body 1.

[0046] In some embodiments, see Figure 6 As shown, the inner wall 42 has a limiting arm 421 on one side close to the bottom wall of the electrical box body 1 , and the limiting arm 421 and the vertical wall of the electrical box body 1 clamp the two opposite side surfaces of the rectifier module 31 .

[0047] In this technical solution, by forming a limiting arm 421 at the bottom end of the inner wall 42, the vertically assembled rectifier module 31 is clamped between it and the inner wall surface of the electrical box body 1, which can effectively improve the position reliability of the rectifier module 31 and prevent the connection between the rectifier module 31 and the circuit board 3 from being broken due to excessive bending moment due to vertical assembly. At the same time, the rectifier module 31 can fit more closely with the electrical box body 1, which can improve the heat dissipation effect of the rectifier module 31 through the electrical box body 1.

[0048] In some embodiments, there are two limiting arms 421 arranged at intervals, and the two limiting arms 421 are respectively located on both sides of the width or length of the rectifier module 31.

[0049] In this technical solution, two spaced-apart limiting arms 421 are used to support the two opposite sides of the rectifier module 31 , which can further enhance the reliable support for the rectifier module 31 .

[0050] In a preferred embodiment, the limiting arm 421 is elastic, so that the limiting arm 421 has a certain deformation ability, and can be suitable for limiting the rectifier modules 31 of different specifications.

[0051] In a specific embodiment, see Figure 4As shown, one of the four groups of plug-in limiting structures is formed on the top surface of the connecting wall 43 of the aforementioned outlet clamp 4. However, this structure makes the injection molding of the outlet clamp 4 somewhat difficult. Therefore, in an embodiment not shown in the figure, at least two protrusions 10 are formed on the end surface of the opening wall of the electrical box body 1, and each of the said slots 11 is formed on the side of each of the said protrusions 10. A positioning through-hole (not marked in the figure) is formed on the said connecting wall 43. One of the said protrusions 10 is inserted through the said positioning through-hole. In this way, while the aforementioned slots 11 are formed on the side of each protrusion 10, the outlet clamp 4 can also be reliably positioned by utilizing the positioning through-holes of the protrusion 10 and the connecting wall 43. It can be understood that the extension direction of the slots 11 on each of the aforementioned protrusions 10 should be consistent with the extension direction of the hook body of each hook 21, for example, both clockwise or counterclockwise.

[0052] In some embodiments, heat dissipation fins 14 are formed on the outer end surface of the bottom wall of the electrical box body 1 to increase the heat dissipation area of ​​the electrical box body 1 and improve the heat dissipation and cooling effect of the box body. The electrical box body 1 is integrally injection-molded using a thermally conductive material. In a specific embodiment, the electrical box body 1 is made of cast aluminum.

[0053] See also Figure 8 As shown, a bearing chamber 23 is formed in the central area of ​​the end cover 2 for providing rotational support for the non-extended end of the motor's rotating shaft.

[0054] According to an embodiment of the present invention, a motor is further provided, comprising the above-mentioned electrical box assembly. Specifically, the above-mentioned electrical box assembly is detachably connected to the non-axial extension end surface of the motor housing via its end cover 2.

[0055] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. An electrical box assembly, characterized in that: The invention comprises an electrical box body (1) and an end cover (2), wherein a first end face of the end cover (2) is detachably connected to a non-axial extension end of a motor, the electrical box body (1) has an opening, a second end face of the end cover (2) is connected to the opening to close the opening, and an insertion limiting structure and a connection positioning structure are provided between the second end face of the end cover (2) and the end face of the opening wall of the electrical box body (1), wherein the insertion limiting structure is used to limit the circumferential rotation of the end cover (2) relative to the electrical box body (1), and the connection positioning structure is used to position the axial displacement of the end cover (2) after the insertion limiting structure limits the circumferential position of the end cover (2).

2. The electrical box assembly according to claim 1, characterized in that: The insertion limiting structure comprises a slot (11) on the end face of the opening wall of the electrical box body (1) and a hook (21) on the second end face of the end cover (2), wherein the hook (21) is inserted into the slot (11), and the insertion limiting structure comprises at least two groups, wherein each group of the insertion limiting structures is evenly spaced around the opening; and / or, the connection positioning structure comprises a connection through hole (12) on the end face of the opening wall of the electrical box body (1), a threaded hole (22) on the end cover (2), and a screw capable of passing through the connection through hole (12) and being threadedly connected to the threaded hole (22).

3. The electrical box assembly according to claim 2, characterized in that: A plurality of mounting seats (13) are formed on the bottom wall of the electrical box body (1), a circuit board (3) is provided inside the electrical box body (1), and the circuit board (3) is supported and assembled on each of the mounting seats (13).

4. The electrical box assembly according to claim 3, characterized in that: The circuit board (3) has a rectifier module (31), the rectifier module (31) is a flat structure, and the side surface where the thickness of the flat structure is located is parallel to the board surface of the circuit board (3) and is electrically connected.

5. The electrical box assembly according to claim 4, characterized in that: A wire outlet clamp (4) is assembled on the vertical wall of the electrical box body (1), and the wire outlet clamp (4) comprises an outer wall (41) located on the outer side of the vertical wall, an inner wall (42) located on the inner side of the vertical wall, and a connecting wall (43) connected to the corresponding ends of the outer wall (41) and the inner wall (42). The outer wall (41), the connecting wall (43), and the inner wall (42) form an insertion slot (40), and the wire outlet clamp (4) is sleeved on the vertical wall of the electrical box body (1) through the insertion slot (40).

6. The electrical box assembly according to claim 5, characterized in that: The inner wall (42) has a limiting arm (421) on one side close to the bottom wall of the electrical box body (1), and the limiting arm (421) and the vertical wall of the electrical box body (1) clamp the two opposite side surfaces of the rectifier module (31).

7. The electrical box assembly according to claim 6, characterized in that: The limiting arms (421) have two spaced-apart arrangement, and the two limiting arms (421) are respectively located on both sides of the width or length of the rectifier module (31); and / or the limiting arms (421) are elastic.

8. The electrical box assembly according to claim 5, characterized in that: At least two bosses (10) are formed on the end surface of the opening wall of the electrical box body (1), each of the slots (11) is formed on the side of each of the bosses (10), and a positioning through hole is formed on the connecting wall (43), and one of the bosses (10) is inserted through the positioning through hole.

9. The electrical box assembly according to claim 1, characterized in that: Heat dissipation fins (14) are formed on the outer end surface of the bottom wall of the electrical box body (1); and / or the electrical box body (1) is integrally injection-molded using a heat-conducting material.

10. A motor, characterized in that: The invention comprises the electrical box assembly according to any one of claims 1 to 9.

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