Motor junction box structure
By adopting a combined structure of reinforcement ring, connecting ring and sealing assembly in the motor junction box, combined with the design of bolts and sealing rings, the problem of sputtering water or mud and sand in the motor junction box of new energy vehicle is solved, and the insulation failure caused by the entry of sputtering water or sand in the motor junction box is realized. Higher waterproof and dustproof effect.
Patent Information
- Application Number
- CN202420274093.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-02-04
AI Technical Summary
Since the end cover of the motor junction box in the field of new energy vehicles is flush with the edge of the box, it is prone to insulating failure caused by sputtering water or mud and sand entering.
A motor junction box structure is designed, using a combination of reinforcement ring and connecting ring, equipped with sealing components and barrier layers. Through the cooperation of bolts and sealing rings, a multi-layer waterproof and dust-proof structure is formed to prevent sputtering water or silt from entering. Inside the junction box.
It effectively reduces the possibility of sputtering water or mud and sand entering the junction box, reduces the risk of wire insulation failure, and improves overall waterproofness and dustproofness.
Smart Images
Figure CN222356110U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of motors used in new energy vehicles, and in particular to a motor junction box structure. Background Art
[0002] The motor junction box has the function of protecting the wire connection points. It can provide a safe environment for the motor to connect wires and cables to protect the wire connection points from the external environment, such as moisture, dust, etc., to ensure the stability and long-term reliability of the connection points and reduce the failure rate.
[0003] At present, the existing motor junction box is provided with an end cover and a box body. The end cover is fixedly connected to the top of the box body by bolts, and the wires are inserted on both sides of the box body. The connection between the end cover and the box body can be removed by rotating the bolts, and the edge of the end cover is flush with the edge of the box body.
[0004] However, motors in the new energy vehicle field need to have characteristics such as waterproof, anti-mud, anti-vibration, and anti-aging due to their harsher operating environment than other industrial motors. However, since the edge of the end cover of the existing motor junction box is flush with the edge of the box body, splashing water or mud and other debris can easily enter the interior of the junction box from the connection between the end cover and the box body, causing insulation failure. Utility Model Content
[0005] In order to address the deficiencies in the prior art, the present application provides a motor junction box structure that can reduce the occurrence of splashing water or debris such as mud and sand entering the interior of the junction box from the connection between the end cover and the box body, and minimize insulation failure of the wires caused by splashing water or mud and sand.
[0006] The present application provides a motor junction box structure adopting the following technical solution:
[0007] A motor terminal box structure comprises a terminal box cover and a terminal box seat, wherein the terminal box cover is fixedly connected to the top of the terminal box seat by bolts, a reinforcement ring is integrally formed at the bottom edge of the terminal box cover, a connecting ring is integrally formed at the top edge of the terminal box seat, the top of the connecting ring abuts against the bottom of the terminal box cover, the inner side surface of the reinforcement ring abuts against the outer surface of the connecting ring, a sealing groove is provided at the top of the connecting ring, a sealing assembly for fixing the connecting ring and the reinforcement ring and sealing is provided at the bottom of the reinforcement ring, and the sealing assembly is clamped in the sealing groove.
[0008] By adopting the above technical solution, when splashing water or mud and sand contact the junction box cover and the junction box seat, since the reinforcement ring covers the connecting ring on the top of the junction box seat, it is difficult for water to enter the interior of the junction box seat through the connecting seam between the opening of the junction box seat and the junction box cover. The reinforcement ring uses a sealing component to fix the connection with the connecting ring, and the surrounding sealing component adds a barrier layer on one side between the reinforcement ring and the connecting ring, which can further block the splashing water or mud and sand from entering the junction box cover, thereby reducing the occurrence of insulation failure of the wires.
[0009] The present application further provides: the sealing assembly includes an embedding piece, a first fixing strip is arranged on the top of the embedding piece close to the reinforcement ring side, a second fixing strip is arranged on the bottom of the embedding piece close to the reinforcement ring side, a first fixing groove is provided at the bottom of the junction box cover, the first fixing strip is clamped in the first connecting groove, the connecting ring is located at the bottom of the sealing groove and a second fixing groove is provided, and the second fixing strip is clamped in the second fixing groove.
[0010] By adopting the above technical solution, the first fixing strip and the second fixing strip connect the reinforcement ring and the connection ring, thereby reinforcing the junction box cover and the junction box seat. The first fixing strip, the second fixing strip and the embedded part form a barrier layer, thereby improving the waterproofness.
[0011] The present application further provides: a third fixing strip is provided on the top of the embedment away from the reinforcement ring, a fourth fixing strip is provided on the bottom of the embedment away from the reinforcement ring, a first groove is provided on the top of the embedment between the first fixing strip and the third fixing strip, and a second groove is provided on the bottom of the embedment between the second fixing strip and the fourth fixing strip.
[0012] By adopting the above technical solution, the third fixing strip, the fourth fixing strip and the embedded part form a second barrier layer on the side away from the reinforcement ring. At the same time, if splashing water or mud passes through the barrier layer formed by the first fixing strip, the second fixing strip and the embedded part, the first groove and the second groove can extend the entry distance of water and mud, further improving the overall waterproofness.
[0013] The present application further provides: the sealing assembly includes a cylindrical plug, the top of the cylindrical plug is integrally formed with a connecting column, the top of the connecting column is arranged at the bottom of the junction box cover, the top of the connecting ring is provided with a cylindrical groove, and the cylindrical plug is snapped into the cylindrical groove.
[0014] By adopting the above technical solution, the cylindrical plug can connect and reinforce the reinforcement ring and the connecting ring, and at the same time, can form a barrier layer with the connecting column that can block splashing water or mud and sand, thereby improving the overall waterproofness.
[0015] The present application further provides that: a sealing ring is provided at the bottom of the rod head of the bolt, and the bottom of the sealing ring abuts against the top of the junction box cover.
[0016] By adopting the above technical solution, the sealing ring can add a barrier layer outside the connection seam between the bolt rod head and the junction box cover, thereby preventing splashing water or mud from entering the junction box seat through the connection seam between the bolt rod head and the junction box cover.
[0017] The present application further provides that: a wire outlet is provided on one side of the junction box seat, and a protective ring is provided on the outer wall of the wire outlet of the junction box seat.
[0018] By adopting the above technical solution, the protective ring can not only make the connection between the wire and the junction box seat tighter, but also improve the waterproofness at the wire outlet position.
[0019] The present application further provides that: the thickness of the reinforcement ring is greater than or equal to the thickness of the connecting ring.
[0020] By adopting the above technical solution, the outer extension of the reinforcement ring can make it difficult for splashing water or mud to contact the reinforcement ring, and difficult to enter from the connection between the connecting ring and the reinforcement ring.
[0021] The present application further provides that: the machined surface roughness of the outer surfaces of the junction box cover and the reinforcement ring is within the range of Ra3.2-6.3μm.
[0022] By adopting the above technical solution, the machining surface roughness of the outer surface of the junction box cover and the reinforcement ring is within Ra3.2-6.3μm, which can improve the friction between the outer surface of the connecting ring and the inner surface of the reinforcement ring, and is also more suitable for most processing methods, thereby improving the flexibility of producing parts.
[0023] In summary, this application has the following beneficial effects:
[0024] In the present application, when splashing water or mud and sand come into contact with the junction box cover and the junction box seat, the reinforcement ring covers the outer surface of the connecting ring on the top of the junction box seat. At this time, it is difficult for water to enter the interior of the junction box seat through the connecting seam between the opening of the junction box seat and the junction box cover. The reinforcement ring is fixedly connected to the connecting ring by a sealing component. At the same time, the surrounding sealing component adds a barrier layer on one side between the reinforcement ring and the connecting ring. The two barrier layers not only effectively prevent splashing water or mud and sand from entering the interior of the junction box, but also reduce the risk of insulation problems of the wires. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.
[0026] Figure 2It is a schematic diagram of the overall cross-sectional structure of Example 1 of the present application.
[0027] Figure 3 This application Figure 2 Schematic diagram of the locally enlarged structure of A in the middle.
[0028] Figure 4 It is a schematic diagram of the overall cross-sectional structure of Example 2 of the present application.
[0029] Figure 5 It is a schematic diagram of the partial structure of the junction box cover and the reinforcement ring in Example 2 of the present application.
[0030] Figure numerals: 1. Junction box cover; 10. Reinforcement ring; 2. Junction box seat; 20. Connecting ring; 21. Sealing groove; 3. Bolt; 4. Sealing assembly; 40. Insert; 41. First fixing strip; 42. Second fixing strip; 43. Third fixing strip; 44. Fourth fixing strip; 45. First groove; 46. Second groove; 47. Column plug; 48. Connecting column; 5. Sealing ring; 6. Wire outlet; 7. Protective ring. DETAILED DESCRIPTION
[0031] The following is combined with Figures 1 to 5 This application is described in further detail.
[0032] Embodiment 1:
[0033] refer to Figures 1 to 3 In this embodiment, a motor terminal box structure includes a terminal box cover 1 and a terminal box seat 2. The terminal box cover 1 is fixedly connected to the top of the terminal box seat 2 by bolts 3. The bottom edge of the terminal box cover 1 is integrally formed with a reinforcement ring 10, and the top edge of the terminal box seat 2 is integrally formed with a connecting ring 20. The top of the connecting ring 20 abuts against the bottom of the terminal box cover 1, and the inner side of the reinforcement ring 10 abuts against the outer surface of the connecting ring 20. The inner side of the reinforcement ring 10 covers the connection between the terminal box cover 1 and the side of the terminal box seat 2, so that splashing water and mud and sand are difficult to enter the terminal box seat 2 from the side. A sealing groove 21 is opened on the top of the connecting ring 20 to strengthen A sealing component 4 is provided at the bottom of the fixing ring 10, and the sealing component 4 is used to fix the connecting ring 20 and the reinforcement ring 10, and to further strengthen the sealing of the connection between the connecting ring 20 and the reinforcement ring 10. After the sealing component 4 is clamped in the sealing groove 21, the surrounding sealing component 4 adds a barrier layer on one side between the reinforcement ring 10 and the connecting ring 20, which can further block the splashing water or mud from entering the junction box cover 1, and try to avoid insulation failure of the wires. Specifically, when producing the junction box cover 1 and the junction box seat 2, the connection seam between the junction box cover 1 and the junction box seat 2 should be between 0.3-0.7mm, and the sealing component 4 can be made of rubber.
[0034] Furthermore, the sealing assembly 4 includes an insert 40, a first fixing strip 41 is integrally formed at the top of the insert 40 near the side of the reinforcement ring 10, a second fixing strip 42 is integrally formed at the bottom of the insert 40 near the side of the reinforcement ring 10, a first fixing groove is provided at the bottom of the junction box cover 1, the first fixing strip 41 is snapped into the first connection groove, a second fixing groove is provided at the bottom of the connecting ring 20 located at the sealing groove 21, the second fixing strip 42 is snapped into the second fixing groove, thereby realizing the connection and reinforcement of the junction box cover 1 and the junction box seat 2, the first fixing strip 41, the second fixing strip 42 and the insert 40 form a barrier layer, if splashing water or mud and sand enters the connection seam between the junction box cover 1 and the junction box seat 2, foreign matter can be blocked to a certain extent.
[0035] Furthermore, a third fixing strip 43 is integrally formed on the top of the insert 40 away from the reinforcement ring 10, and a fourth fixing strip 44 is integrally formed on the bottom of the insert 40 away from the reinforcement ring 10. A first groove 45 is provided at the top of the insert 40 between the first fixing strip 41 and the third fixing strip 43, and a second groove 46 is provided at the bottom of the insert 40 between the second fixing strip 42 and the fourth fixing strip 44. If splashing water or mud passes through the barrier layer formed by the first fixing strip 41, the second fixing strip 42 and the insert 40, the first groove 45 and the second groove 46 can extend the entry distance of water and mud, and the second barrier layer formed by the third fixing strip 43, the fourth fixing strip 44 and the insert 40 can further block the water or mud.
[0036] In addition, a sealing ring 5 is fixedly connected to the bottom of the rod head of the bolt 3, and the bottom of the sealing ring 5 abuts against the top of the junction box cover 1. The sealing ring 5 blocks splashing water or mud before touching the connection seam between the rod head of the bolt 3 and the junction box cover 1, thereby reducing the possibility of splashing water or mud entering the junction box seat 2 from the connection seam between the rod head of the bolt 3 and the junction box cover 1. In this embodiment, the sealing ring 5 is made of rubber.
[0037] Furthermore, a wire outlet 6 is opened on one side of the junction box seat 2, and a protective ring 7 is fixedly connected to the outer wall of the wire outlet 6 of the junction box seat 2. In the present embodiment, the protective ring 7 is made of rubber, which can make the connection between the wires inserted in the protective ring 7 and the junction box seat 2 tighter, thereby improving the overall waterproofness at the wire outlet 6.
[0038] Furthermore, the thickness of the reinforcement ring 10 is greater than or equal to the thickness of the connecting ring 20. Specifically, the thickness of the reinforcement ring 10 is greater than or equal to the thickness of the connecting ring 20, which is greater than or equal to 2-3 mm. The splashing water or mud from the side of the connection between the connecting ring 20 and the reinforcement ring 10 can be blocked by the extended part of the connecting ring 20, and the splashing water or mud is difficult to enter the junction box seat 2.
[0039] In addition, the machined surface roughness of the outer surfaces of the junction box cover 1 and the reinforcement ring 10 is in the range of Ra3.2-6.3μm. In the present embodiment, Ra4μm is selected. Therefore, while the friction between the outer surface of the connecting ring 20 and the inner surface of the reinforcement ring 10 can be improved, it is also more suitable for most processing methods. Therefore, a variety of production methods can be used. In the present embodiment, steel plate stamping technology is used for processing and forming. In another embodiment, steel plate welding technology is used for processing and forming.
[0040] The implementation principle of the embodiment of the present application is as follows: when splashing water or mud contacts the junction box cover 1 and the junction box seat 2, the reinforcement ring 10 can initially block the splashing water or mud. When the splashing water or mud enters from the connecting seam at the bottom of the reinforcement ring 10 and the connecting ring 20, the barrier layer formed by the first fixing bar 41, the second fixing bar 42 and the embedding member 40 can block the splashing water or mud again. If the splashing water or mud enters from the barrier layer formed by the first fixing bar 41, the second fixing bar 42 and the embedding member 40, it may stay on the groove wall of the first groove 45 and the second groove 46, or be blocked again by the third fixing bar 43, the fourth fixing bar 44 and the embedding member 40.
[0041] Embodiment 2:
[0042] refer to Figure 4 and Figure 5 The difference from Example 1 lies in the setting method of the sealing component 4 and the processing method of the junction box cover 1 and the reinforcement ring 10. In this embodiment, the sealing component 4 includes a cylindrical plug 47, and a connecting column 48 is integrally formed on the top of the cylindrical plug 47. The top of the connecting column 48 is fixedly connected to the bottom of the junction box cover 1. A cylindrical groove is provided on the top of the connecting ring 20, and the cylindrical plug 47 is snapped into the cylindrical groove. The cylindrical plug 47 connects and reinforces the reinforcement ring 10 and the connecting ring 20, and at the same time forms a barrier layer with the connecting column 48, so that it is difficult for splashing water or mud to pass through the cylindrical plug 47 and the connecting column 48 into the junction box seat 2.
[0043] Furthermore, in this embodiment, the junction box cover 1 and the reinforcement ring 10 are produced by plastic compression molding.
[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A motor junction box structure, characterized in that: The invention comprises a junction box cover (1) and a junction box seat (2); the junction box cover (1) is fixedly connected to the top of the junction box seat (2) by means of bolts (3); a reinforcing ring (10) is integrally formed on the bottom edge of the junction box cover (1); a connecting ring (20) is integrally formed on the top edge of the junction box seat (2); the top of the connecting ring (20) abuts against the bottom of the junction box cover (1); the inner side surface of the reinforcing ring (10) abuts against the outer surface of the connecting ring (20); a sealing groove (21) is provided on the top of the connecting ring (20); a sealing component (4) for fixing the connecting ring (20) and the reinforcing ring (10) and performing sealing is provided at the bottom of the reinforcing ring (10); the sealing component (4) is snap-fitted into the sealing groove (21).
2. A motor junction box structure according to claim 1, characterized in that: The sealing assembly (4) comprises an insert (40), a first fixing strip (41) is arranged at the top of the insert (40) close to the side of the reinforcement ring (10), a second fixing strip (42) is arranged at the bottom of the insert (40) close to the side of the reinforcement ring (10), a first fixing groove is provided at the bottom of the junction box cover (1), the first fixing strip (41) is snapped into the first connecting groove, and a second fixing groove is provided at the bottom of the connecting ring (20) located at the sealing groove (21), and the second fixing strip (42) is snapped into the second fixing groove.
3. A motor junction box structure according to claim 2, characterized in that: A third fixing strip (43) is provided at the top of the insert (40) on a side away from the reinforcement ring (10), and a fourth fixing strip (44) is provided at the bottom of the insert (40) on a side away from the reinforcement ring (10). A first groove (45) is provided at the top of the insert (40) between the first fixing strip (41) and the third fixing strip (43), and a second groove (46) is provided at the bottom of the insert (40) between the second fixing strip (42) and the fourth fixing strip (44).
4. A motor junction box structure according to claim 1, characterized in that: The sealing assembly (4) comprises a cylindrical plug (47), a connecting column (48) is integrally formed on the top of the cylindrical plug (47), the top of the connecting column (48) is arranged on the bottom of the junction box cover (1), a cylindrical groove is formed on the top of the connecting ring (20), and the cylindrical plug (47) is snapped into the cylindrical groove.
5. The motor junction box structure according to claim 1, characterized in that: A sealing ring (5) is provided at the bottom of the rod head of the bolt (3), and the bottom of the sealing ring (5) abuts against the top of the junction box cover (1).
6. A motor junction box structure according to claim 1, characterized in that: A wire outlet (6) is provided on one side of the junction box seat (2), and a protective ring (7) is provided on the outer wall of the wire outlet (6) of the junction box seat (2).
7. The motor junction box structure according to claim 1, characterized in that: The thickness of the reinforcement ring (10) is greater than or equal to the thickness of the connecting ring (20).
8. The motor junction box structure according to claim 1, characterized in that: The machined surface roughness of the outer surfaces of the junction box cover (1) and the reinforcement ring (10) is within the range of Ra3.2-6.3 μm.