Motor junction box mounting structure and motor using same

Abstract

The utility model discloses a motor junction box mounting structure and a motor using the same, and relates to the technical field of motor manufacturing. The junction box body is installed on the base through screws. The junction box body is composed of a junction box base and a junction box gland, and both the base and the junction box base are provided with wire passing through holes; the junction box base is of a three-layer stepped structure and comprises a flanging part, a shell part and a boss part, the boss part is matched with the annular mounting groove in an inserted mode, and the flanging part and the junction box gland are fixed through screws. The shell part is provided with a wire outlet sleeve and a heat dissipation hole, the bottom is provided with a first sealing structure, and the flanging part is provided with a third sealing ring which is in sealing fit with the junction box gland. The utility model also relates to a motor. The motor comprises the motor junction box installation structure and the motor housing which is integrally formed with the pedestal. According to the utility model, through the design of the base and the junction box which are integrally formed, the installation process is simplified, the efficiency is improved, and meanwhile, electrical elements are effectively protected and kept clean by adopting the design of a sealing structure and heat dissipation holes.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, and particularly relates to an installation structure of a motor terminal box and a motor adopting the structure. Background Art

[0002] Traditional motor terminal boxes are usually fixed on the motor housing by bolts or welding, and the installation process is cumbersome and time-consuming. In addition, traditional terminal box designs often neglect heat dissipation and dust prevention requirements, resulting in the following problems:

[0003] 1. Dust is likely to accumulate inside, affecting the normal operation of electrical components;

[0004] 2. The heat dissipation effect is not good, and overheating problems are likely to occur;

[0005] 3. The sealing performance is insufficient. Especially in a humid environment, moisture is likely to penetrate into the terminal box, damaging electrical components such as wiring boards and terminal blocks. Summary of the Utility Model

[0006] In view of this, the utility model provides an installation structure of a motor terminal box and a motor applying the same to solve the technical problems of inconvenient installation, poor heat dissipation, and poor dust-proof and sealing performance of the motor terminal box in the prior art.

[0007] To achieve the above object, the utility model provides the following technical solutions:

[0008] An installation structure of a motor terminal box and a motor applying the same, comprising:

[0009] A terminal box body and a base. An annular installation groove is provided at the top of the base, and the terminal box body is installed on the base by screws; the terminal box body is composed of a terminal box base and a terminal box cover. The base and the terminal box base are both provided with wire passing through holes; the terminal box base adopts a three-layer stepped structure, including a flanging part, a shell part, and a boss part. The boss part is inserted and matched with the annular installation groove, and the flanging part is fixed to the terminal box cover by screws; the shell part is provided with a wire outlet sleeve and heat dissipation holes, a first sealing structure is provided at the bottom of the shell part, and a third sealing ring for sealing cooperation with the terminal box cover is provided on the flanging part.

[0010] Further, the first sealing structure and the third sealing ring respectively adopt elastic sealing materials of different materials.

[0011] Further, the heat dissipation holes are provided in multiple numbers and are evenly distributed.

[0012] Further, a fourth sealing ring is provided between the flanging part and the terminal box cover, and a raised structure is provided on the surface of the fourth sealing ring.

[0013] Furthermore, a detachable dust-proof component is provided outside the heat dissipation holes, and the dust-proof component includes a filter screen and a mounting plate.

[0014] Furthermore, a dehumidifying device containing a drying medium is provided in the housing part, and the dehumidifying device is fixed by a limiting component.

[0015] A motor includes the motor terminal box mounting structure described in any one of the above, and the motor further includes a motor housing integrally formed with the base.

[0016] It can be seen from the above technical solutions that the advantages of the present utility model are:

[0017] By designing a base and a terminal box body integrally formed with the motor housing, the present utility model simplifies the installation process and improves the installation efficiency. At the same time, a sealing structure design is adopted between the terminal box body and the base, effectively preventing the infiltration of external liquid and dust, and providing a reliable protection barrier for the wiring board and electrical components.

[0018] By opening heat dissipation holes on the terminal box body and providing a dust-proof component, the present utility model not only ensures the heat dissipation efficiency inside the terminal box, but also effectively blocks the intrusion of dust and sundries, thus ensuring the cleanliness of the internal environment of the terminal box and the stable operation of electrical components.

[0019] The present utility model also designs a detachable dehumidifying device, which can conveniently replace the dehumidifying box to ensure the continuous dryness inside the terminal box, further improving the reliability and service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0021] Figure 1 It is a schematic structural diagram of the terminal box mounting structure of the present utility model.

[0022] Figure 2 It is Figure 1 a partial detailed enlarged view of point A of

[0023] Figure 3 It is Figure 1 a partial cross-sectional view of

[0024] Figure 4 It is Figure 3 a key structural enlarged view of point B of

[0025] Figure 5 It is Figure 3 a partial enlarged view of point C of

[0026] Figure 6 is Figure 1 the D-D sectional view of

[0027] Figure 7 is the schematic diagram of the connection structure between the dehumidifying device and the junction box.

[0028] Figure 8 is Figure 7 the enlarged partial view at position E of

[0029] Figure 9 is the schematic diagram of the structure of the junction box and the motor of the present utility model.

[0030] Explanation of reference numerals: 10 - motor housing; 20 - base; 201 - annular mounting groove; 30 - junction box body; 1 - junction box base; 11 - flanging part; 111 - sealing groove; 12 - housing part; 121 - heat dissipation holes; 122 - mounting holes; 123 - positioning groove; 13 - boss part; 2 - first sealing structure; 21 - first sealing ring; 22 - second sealing ring; 31 - filter net; 32 - mounting plate; 33 - socket head cap screw; 4 - junction box gland; 41 - flange; 5 - outgoing line sleeve; 6 - third sealing ring; 7 - fourth sealing ring; 71 - washer part; 72 - overlapping part; 73 - protrusion; 8 - dehumidifying device; 81 - mounting box; 811 - dehumidifying holes; 82 - dehumidifying box; 83 - cover plate; 84 - elastic element; 85 - pressing plate; 86 - positioning strip; 87 - L-shaped outer plate; 871 - limiting groove; 9 - limiting component; 91 - limiting seat; 911 - jack; 912 - movable groove; 92 - swing rod; 93 - limiting block; 94 - pressing rod; 95 - pivot rod; 96 - roller; 97 - elastic sheet; 98 - support. Detailed implementation manners

[0031] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the implementation manners and the drawings. Herein, the illustrative implementation manners of the present utility model and their descriptions are used to explain the present utility model, but do not limit the present utility model.

[0032] The existing motor junction boxes generally have the following technical defects:

[0033] Insufficient sealing performance: The traditional single sealing ring is prone to aging and cracking, resulting in rainwater and oil stains seeping in, leading to the risk of short circuit (the IP protection level is usually ≤ IP54).

[0034] Low heat dissipation efficiency: The closed structure causes the temperature to rise too fast, and the high temperature accelerates the aging of the insulation, shortening the service life of the equipment.

[0035] Poor environmental adaptability: Lack of active dehumidification function, easy to condensate in high humidity environment, causing electrical components to fail.

[0036] High maintenance cost: The filter screen replacement requires overall disassembly, which is time-consuming and laborious; the dehumidification material cannot be replaced, and the whole unit needs to be scrapped after it fails.

[0037] Embodiment 1

[0038] Reference Figures 1 to 6 , such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in

[0039] This embodiment provides a mounting structure for a motor junction box, including a junction box body 30 and a base 20 integrally formed with the motor housing 10. The top views of both the base 20 and the junction box body 30 are square. The base 20 extends to the outside of the motor housing 10 in a boss shape, and its top is provided with an annular mounting groove 201. The junction box body 30 is mounted on the base 20 by screws; the junction box body 30 includes a junction box cover 4 provided on the junction box base 1. Through holes are provided at the top of the base 20 and the middle of the junction box base 1 for passing through the internal wiring terminals of the motor.

[0040] The first sealing ring 21 and the second sealing ring 22 are made of nitrile rubber.

[0041] The third sealing ring 6 is made of fluororubber.

[0042] Furthermore, there are 3 heat dissipation holes 121.

[0043] In one embodiment, such as Figure 4As shown, an installation groove for avoiding the first sealing ring 21 and the second sealing ring 22 is provided at the top of the base 20.

[0044] Specifically, as Figure 3 and 5 shown, a fourth sealing ring 7 is provided between the side of the flanging portion 11 opposite to the flange 41. The fourth sealing ring 7 includes a washer portion 71 and a lapping portion 72 that are integrally connected. The radial cross-section of the fourth sealing ring 7 is in an "L" shape. A sealing groove 111 adapted to the lapping portion 72 is provided on one side of the top of the flanging portion 11 near the wire passing through hole. Raised portions 73 concentric with the fourth sealing ring 7 are uniformly provided on both the inner and outer sides of the lapping portion 72. The provision of the raised portions 73 further enhances the tight fit between the fourth sealing ring 7 and the sealing groove 111, improving the sealing effect.

[0045] Wave-shaped ridges are provided on the raised portions 73 to form a labyrinth sealing structure, effectively blocking the penetration of liquid.

[0046] In addition, the washer portion 71 is located between the flanging portion 11 and the flange 41, playing a good buffering and sealing role, effectively preventing liquid or dust from seeping into the junction box body 30 through the gap between the flanging portion 11 and the flange 41, and further improving the sealing performance of the junction box.

[0047] In one embodiment, as Figure 2 and Figure 6 shown, the dust-proof component includes a filter net 31 covering the outside of the heat dissipation hole 121 and a mounting plate 32 fixedly connected to the filter net 31. The socket head cap screw 33 passes through the mounting plate 32 to fixedly connect the dust-proof component to the junction box base 1. The provision of the filter net 31 effectively prevents dust and sundries from entering the inside of the junction box, thus ensuring the cleanliness of the internal environment of the junction box and the normal operation of electrical components. At the same time, the socket head cap screw 33 makes the installation and disassembly of the dust-proof component simple and convenient, facilitating the user to clean and replace the filter net 31, thereby extending the service life of the junction box.

[0048] The filter net 31 is made of 304 stainless steel, and the mounting plate 32 is an anodized aluminum plate.

[0049] The filter net 31 is treated by electrostatic spraying and has an IP54 protection grade.

[0050] Furthermore, the first sealing ring 21, the second sealing ring 22, the third sealing ring 6, and the fourth sealing ring 7 are all made of rubber or silicone materials with excellent oil resistance, water resistance, and aging resistance, ensuring the stability and reliability of long-term use.

[0051] Embodiment Two

[0052] The junction box installation structure in the second embodiment is an improvement based on the above embodiment. The technical content disclosed in the above embodiment will not be described repeatedly, and the content disclosed in the above embodiment also belongs to the content disclosed in the second embodiment.

[0053] In an alternative solution of this embodiment, referring to Figure 7 and Figure 8 , as Figure 7 shown, on one side surface of the housing part 12 facing the wire outlet sleeve 5, an installation hole 122 and a pair of positioning grooves 123 are provided. The dehumidification device 8 is arranged on the installation hole 122. The dehumidification device 8 includes an installation box 81 lapped on the positioning grooves 123, a dehumidification box 82 arranged in the installation box 81, a pressing plate 85 slidably arranged in the installation box 81, and a cover plate 83 arranged on the outer wall of the housing part 12 and fixedly connected to the pressing plate 85 through an elastic element 84. A plurality of dehumidification holes are evenly arranged on one side of the installation box 81 close to the center of the housing part 12, so that the moisture in the housing part 12 can smoothly enter the dehumidification box 82. A drying packet is arranged in the dehumidification box 82, which can effectively absorb the internal moisture and keep the internal in a dry state; a pair of positioning strips 86 adapted to the positioning grooves 123 are arranged on the inner side of the cover plate 83, which further enhances the stability and accuracy of the cover plate 83; a pair of L-shaped outer plates 87 are symmetrically arranged on both sides of the short side of the cover plate 83, and the cover plate 83 can be removed respectively by a pair of limiting components 9 clamping into the limiting grooves 871 of the L-shaped outer plates 87, realizing the rapid replacement of the dehumidification device 8.

[0054] During the working process of the dehumidification device 8, when the humidity inside the housing part 12 is relatively high, the moisture enters the dehumidification box 82 through the dehumidification holes 811 and is absorbed by the drying packet therein. As the use time increases, the moisture absorption capacity of the drying packet gradually weakens. At this time, the cover plate 83 can be removed to conveniently replace the dehumidification box 82 to ensure the continuous dryness inside the housing part 12.

[0055] Preferably, a nano-silica gel desiccant is arranged in the dehumidification box 82, which can effectively absorb the internal moisture and keep the internal in a dry state.

[0056] The dehumidification holes 811 are honeycomb-shaped ventilation holes.

[0057] Further, as Figure 8As shown in the figure, the limit component 9 includes a limit seat 91 fixedly connected to the outer wall of the housing part 12, a swing rod 92 rotatably installed in the limit seat 91 through a pivot rod 95, a pressure rod 94 fixedly connected to one side of the swing rod 92, and a limit block 93 arranged on the other side of the swing rod 92. The limit seat 91 includes a limit seat body and a seat plate. A jack 911 for accommodating the L-shaped outer plate 87 to extend into is provided on the seat plate, and a movable groove 912 for accommodating the pressure rod 94 to move is provided on the limit seat body. A spring piece 97 on a support 98 arranged inside the limit seat 91 presses against a roller 96 arranged on the swing rod 92. This design ensures the stability and reliability of the limit component 9.

[0058] When it is necessary to remove the cover plate 83, just gently press the pressure rod 94, and the swing rod 92 will rotate, driving the limit block 93 to disengage from the limit groove 871, thereby allowing the L-shaped outer plate 87 to be pulled out from the jack 911, realizing the removal of the cover plate 83. On the contrary, when it is necessary to install the cover plate 83, just insert the L-shaped outer plate 87 into the jack 911, and then release the pressure rod 94. The swing rod 92 will reset under the action of the spring piece 97, driving the limit block 93 to snap into the limit groove 871 to firmly fix the cover plate 83.

[0059] Embodiment Three

[0060] As Figure 9 shown, Embodiment Three of the present invention provides a motor, including a motor housing 10 integrally formed with a base 20 and the junction box installation structure of any one of the above embodiments. Therefore, it has all the beneficial technical effects of the junction box installation structure of any one of the above embodiments, and will not be elaborated here.

[0061] Traditional junction boxes are prone to short-circuit risks due to salt spray corrosion and rainwater infiltration. This structure adopts:

[0062] IP67 protection level: The triple sealing rings (the first sealing ring 21, the second sealing ring 22, and the third sealing ring 6) cooperate with the L-shaped labyrinth seal of the fourth sealing ring 7 to effectively block high-pressure water jets.

[0063] Active dehumidification system: The nano-silica gel desiccant circulates and absorbs moisture through the honeycomb-shaped ventilation holes to maintain the relative humidity inside the box ≤ 45%RH and avoid condensation.

[0064] Dust-proof component: 304 stainless steel filter + anodized aluminum diversion plate, combined with the IP54 protection level, to block construction site dust and metal debris.

[0065] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mounting structure for a motor junction box, characterized in that It includes a junction box body (30) and a base (20). An annular mounting groove (201) is provided at the top of the base (20), and the junction box body (30) is mounted on the base (20) by screws. The junction box body (30) is composed of a junction box base (1) and a junction box gland (4). Both the base (20) and the junction box base (1) are provided with wire passing through holes. The junction box base (1) adopts a three-layer stepped structure, including a flanging part (11), a housing part (12), and a boss part (13). The boss part (13) is inserted and matched with the annular mounting groove (201), and the flanging part (11) and the junction box gland (4) are fixed by screws. The housing part (12) is provided with an outlet sleeve (5) and heat dissipation holes (121). A first sealing structure (2) is provided at the bottom of the housing part (12), and a third sealing ring (6) for sealing cooperation with the junction box gland (4) is provided on the flanging part (11). A fourth sealing ring (7) is provided between the flanging part (11) and the junction box gland (4), and a convex structure is provided on the surface of the fourth sealing ring (7). The housing part (12) is provided with a dehumidifying device (8) containing a drying medium, and the dehumidifying device (8) is fixed by a limiting component (9).

2. The installation structure of the motor junction box according to claim 1, wherein, The first sealing structure (2) and the third sealing ring (6) respectively adopt elastic sealing materials of different materials.

3. The installation structure of the motor junction box according to claim 1, characterized in that, The heat dissipation holes (121) are provided in multiple numbers and are evenly distributed.

4. The installation structure of the motor junction box according to claim 1, wherein, A detachable dust-proof component is provided outside the heat dissipation holes (121), and the dust-proof component includes a filter net (31) and a mounting plate (32).

5. A motor, comprising the motor terminal box mounting structure according to any one of claims 1-4, characterized in that, The motor further includes a motor housing (10) integrally formed with the base (20).

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