Sealing structure of motor controller power cable

Abstract

The utility model relates to a sealing structure of a motor controller power cable, which comprises a shell, a junction box mounted on the top surface of the shell, a conductive column mounted in the middle of the junction box and penetrating through the shell downwards, an accommodating groove arranged on the junction box at the top end of the conductive column, and an end portion of the accommodating groove penetrating through the end surface of the junction box along the length direction. The end of the power cable is assembled in the containing groove, the inner end of the power cable is electrically connected with the top end of the conductive column, and an upper cover plate is installed on the top face of the junction box. Sealing structures are installed between the power cable and the junction box, between the power cable and the upper cover plate, and between the conductive column and the shell. Therefore, while power cable connection is realized, overall sealing is taken into consideration, the overall layout is compact, the size is reduced, the sealing grade is met, the cost is reduced, and the practicability is good.

Description

Technical Field

[0001] This utility model relates to the field of motor controller technology, and in particular to a sealing structure for a motor controller power cable. Background Technology

[0002] In the motor controller industry, waterproof connectors are typically used for cable output connections to meet design requirements and ensure IP protection ratings.

[0003] Existing waterproof connectors need to balance cable routing and sealing requirements, resulting in larger size and higher cost. Utility Model Content

[0004] To address the aforementioned issues, this application provides a reasonably structured sealing structure for motor controller power cables. This structure achieves both power cable connection and overall sealing, resulting in a compact layout, reduced volume, and compliance with sealing requirements. This contributes to cost reduction and practicality.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A sealing structure for a motor controller power cable includes a housing, a junction box mounted on the top surface of the housing, a conductive post extending downward through the housing in the middle of the junction box, a receiving groove on the junction box located at the top of the conductive post, the end of the receiving groove extending through the end face of the junction box along its length, the end of the power cable fitting into the receiving groove, the inner end of the power cable being electrically connected to the top of the conductive post, and a top cover plate mounted on the top surface of the junction box; sealing structures are installed between the power cable and the junction box and the top cover plate, and between the conductive post and the housing.

[0007] As a further improvement to the above technical solution:

[0008] The conductive post is connected to the end of the power cable, and the conductive post and the power cable form a mutually perpendicular layout structure.

[0009] The power cable has a copper lug installed at its inner end, and a locking member passes through the copper lug and locks onto the end of the conductive post.

[0010] A sealing gasket is installed between the upper cover plate and the junction box. The sealing gasket extends downward toward the power cable to form an upper sealing element. A lower sealing element is installed between the lower part of the power cable and the receiving groove. The upper sealing element and the lower sealing element constitute a sealing structure between the power cable, the junction box, and the upper cover plate.

[0011] A sealing groove is provided perpendicular to the length of the receiving groove, and a lower sealing element is installed at the sealing groove. The lower sealing element and the upper sealing element are arranged facing each other on the same circumference of the power cable through an inward concave structure.

[0012] Two accommodating slots are spaced apart to accommodate two power cables corresponding to the positive and negative terminals. A protrusion is formed on the junction box located between the two accommodating slots, with the top surface of the protrusion in close contact with the sealing gasket. A locking screw is installed from top to bottom through the upper cover plate and the sealing gasket toward the protrusion.

[0013] Fasteners are installed through the top cover and sealing gasket towards the junction box lock.

[0014] Fastener 2 is installed through the junction box and towards the outer casing.

[0015] The outer shell extends downward at the lower opening of the through hole to form a lower flange. A sealing ring is installed between the outer circumferential surface of the conductive post and the inner wall surface of the through hole on the outer shell, forming a sealing structure between the conductive post and the outer shell.

[0016] The conductive post has a stepped surface along the circumference, forming a small diameter section and a large diameter section. The small diameter section of the conductive post is located inside the junction box and is connected and installed with the power cable. The junction box extends downward along the circumference of the conductive post to form an inner flange. The inner flange extends downward into the through hole of the outer shell. The bottom surface of the inner flange and the top surface of the stepped surface are respectively attached to the upper and lower ends of the sealing ring.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This utility model horizontally houses the end of the power cable in the junction box and electrically connects it to the top of the conductive post extending downward from the outer shell. Combined with the setting of the sealing structure, it achieves a compact layout for the power cable connection, reduces the size, is easy to operate, takes into account the overall reliable sealing, meets the sealing level, helps to reduce costs, and has good practicality.

[0019] This utility model also has the following advantages:

[0020] The upper and lower seals form a radial seal around the power cable, which, together with the sealing gasket and sealing ring, achieves a seal after the power cable is connected to the junction box, meeting the IP protection level requirements. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the present invention.

[0022] Figure 2 This is a cross-sectional view of the present invention.

[0023] Figure 3 This is a top view of the junction box of this utility model.

[0024] Figure 4 This is an exploded view of the present invention.

[0025] The components include: 1. Locking screw; 2. Top cover plate; 3. Sealing gasket; 4. Power cable; 5. Junction box; 6. Lower seal; 7. Sealing ring; 8. Housing; 9. Conductive post; 10. Fastener one; 11. Fastener two;

[0026] 31. Upper sealing element;

[0027] 51. Receiving groove; 52. Sealing groove; 53. Protruding post; 54. Inner flange;

[0028] 81. Lower flange. Detailed Implementation

[0029] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0030] like Figure 1 and Figure 2 As shown, the sealing structure of a motor controller power cable in this embodiment includes a housing 8, a junction box 5 installed on the top surface of the housing 8, a conductive post 9 extending downward through the housing 8 installed in the middle of the junction box 5, a receiving groove 51 opened on the junction box 5 at the top of the conductive post 9, the end of the receiving groove 51 extending through the end face of the junction box 5 along the length direction, the end of the power cable 4 being fitted into the receiving groove 51, the inner end of the power cable 4 being electrically connected to the top of the conductive post 9, and a top cover plate 2 installed on the top surface of the junction box 5; sealing structures are installed between the power cable 4 and the junction box 5 and the top cover plate 2, and between the conductive post 9 and the housing 8.

[0031] In this embodiment, the end of the power cable 4 is horizontally housed in the junction box 5 and electrically connected to the top of the conductive post 9 extending downward from the outer shell 8, thereby achieving a compact layout for the connection of the power cable 4, reducing its size and making it easy to operate; and combined with the setting of the sealing structure, the sealing effect is achieved and guaranteed.

[0032] The conductive post 9 is connected to the end of the power cable 4, and the conductive post 9 and the power cable 4 form a mutually perpendicular layout structure; while ensuring reliable electrical connection, a compact layout is achieved.

[0033] A copper lug is installed at the inner end of the power cable 4. After the locking piece passes through the copper lug, it is locked to the end of the conductive post 9, thereby achieving a reliable fixed installation between the end of the power cable 4 and the conductive post 9.

[0034] A sealing gasket 3 is installed between the top cover 2 and the junction box 5, such as Figure 4 As shown, the sealing gasket 3 extends downward toward the power cable 4 to form an upper sealing element 31, and a lower sealing element 6 is installed between the lower part of the power cable 4 and the receiving groove 51. The upper sealing element 31 and the lower sealing element 6 constitute the sealing structure between the power cable 4 and the junction box 5 and the upper cover plate 2.

[0035] In this embodiment, the sealing gasket 3 achieves the sealing performance between the upper cover plate 2 and the junction box 5, while the upper sealing member 31 and the lower sealing member 6 combine to achieve the sealing of the junction box 5 where the power cable 4 is installed through the receiving groove 51, effectively ensuring the overall sealing of the junction box 5 after the power cable 4 is installed.

[0036] like Figure 3 As shown, a sealing groove 52 is provided perpendicular to the length direction of the receiving groove 51. A lower sealing element 6 is installed at the sealing groove 52. The lower sealing element 6 and the upper sealing element 31 are arranged facing each other on the same circumference of the power cable 4 via a concave structure.

[0037] In this embodiment, the upper sealing element 31 and the lower sealing element 6 form a radial seal around the power cable 4. Combined with the sealing gasket 3 and the sealing ring 7, the power cable 4 is sealed after being connected to the junction box 5, which meets the IP protection level requirements.

[0038] In this embodiment, the sealing groove 52 is used to position and limit the lower seal 6 on the junction box 5.

[0039] Two accommodating slots 51 are spaced apart for mounting two power cables 4 corresponding to the positive and negative terminals; a protrusion 53 is formed on the junction box 5 located between the two accommodating slots 51, and the top surface of the protrusion 53 is in close contact with the sealing gasket 3; a locking screw 1 is installed from top to bottom through the upper cover plate 2 and the sealing gasket 3 toward the protrusion 53.

[0040] Fastener 10 is installed through the top cover plate 2 and sealing gasket 3 towards the junction box 5.

[0041] In this embodiment, the fastener 10 and the locking screw 1 effectively ensure the reliable locking and fixing between the upper cover plate 2 and the junction box 5, which helps to ensure the sealing effect of the sealing gasket 3; in particular, the setting of the protruding post 53 on the junction box 5 ensures the tightness between the upper cover plate 2 and the junction box 5 at the location where the power cable 4 is installed.

[0042] Fastener 211 is installed through junction box 5 onto housing 8, thereby enabling junction box 5 to be installed on housing 8.

[0043] The outer casing 8 extends downward at the lower opening of the through hole to form a lower flange 81. A sealing ring 7 is installed between the outer circumferential surface of the conductive post 9 and the inner wall surface of the through hole on the outer casing 8, forming a sealing structure between the conductive post 9 and the outer casing 8. The lower flange 81 forms an installation space for the sealing ring 7, ensuring the sealing effect after the sealing ring 7 is installed.

[0044] The conductive post 9 has a stepped surface along the circumference, forming a small diameter section and a large diameter section. The small diameter section of the conductive post 9 is located inside the junction box 5 and is connected and installed with the power cable 4. The junction box 5 extends downward along the circumference of the conductive post 9 to form an inner flange 54. The inner flange 54 extends downward into the through hole of the outer shell 8. The bottom surface of the inner flange 54 and the top surface of the stepped surface are respectively attached to the upper and lower ends of the sealing ring 7, which helps to ensure the sealing reliability of the sealing ring 7.

[0045] In this embodiment, by installing the junction box 5 on the outer casing 8, and combining the upper cover plate 2, sealing gasket 3, lower sealing element 6, and sealing ring 7, the conductive post 9 is electrically connected and led out via the power cable 4 to form a waterproof connector, thereby achieving a sealed connection of the power cable 4 on the motor controller.

[0046] This embodiment achieves waterproof external connection of motor controller cable output through two-stage sealing, with low cost and layout in a compact structure.

[0047] The installation process of this utility model is as follows:

[0048] Assemble the sealing ring 7 inside the lower flange 81 of the housing 8; install the junction box 5 on the housing 8, located outside the motor controller; pass the conductive post 9 through the sealing ring 7 and the housing 8, extending it to the outside of the motor controller; Figure 3 The motor controller shown is in the state where the power cable is not assembled.

[0049] Install the lower seal 6 into the sealing groove 52 of the junction box 5; place the power cable 4 into the receiving groove 51 of the junction box 5, and connect the end of the power cable 4 to the conductive post 9; install the sealing gasket 3 onto the junction box 5; press the upper cover 2 onto the sealing gasket 3, and lock it onto the junction box 5 with the locking screw 1 and fastener 10.

[0050] This invention achieves a compact layout for power cable connections, reducing size and making operation convenient. It also ensures reliable overall sealing, meets sealing requirements, helps reduce costs, and is highly practical.

[0051] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0052] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A seal structure for a motor controller power cable, characterized by: The utility model provides a power cable sealing structure, including shell (8), the top surface of shell (8) is equipped with terminal box (5), the middle part of terminal box (5) is equipped with the electrically conductive column (9) that penetrates shell (8) downward, is equipped with the accommodation groove (51) in terminal box (5) at the top end of electrically conductive column (9), and the end of accommodation groove (51) penetrates the end surface of terminal box (5) along the length direction, and the end of power cable (4) is equipped in accommodation groove (51), and the inner end of power cable (4) is electrically connected with the top end of electrically conductive column (9), and the top surface of terminal box (5) is equipped with upper cover plate (2), the sealing structure is installed between power cable (4) and terminal box (5), upper cover plate (2), and the sealing structure is installed between electrically conductive column (9) and shell (8).

2. A seal for a motor controller power cable as recited in claim 1, wherein: The electrically conductive column (9) is connected with the end of the power cable (4), and the electrically conductive column (9) and the power cable (4) form a perpendicular arrangement structure.

3. A seal for a motor controller power cable as claimed in claim 1 or 2, wherein: The inner end of the power cable (4) is provided with a copper nose, and the locking member is locked to the end of the electrically conductive column (9) after penetrating the copper nose.

4. A seal for a motor controller power cable as set forth in claim 1, characterized by: A sealing gasket (3) is installed between the upper cover plate (2) and the terminal box (5), and the sealing gasket (3) extends downward to form an upper sealing member (31) towards the power cable (4). A lower sealing member (6) is installed between the lower part of the power cable (4) and the accommodation groove (51), and the sealing structure between the power cable (4) and the terminal box (5), the upper cover plate (2) is formed by the upper sealing member (31) and the lower sealing member (6).

5. A seal for a motor controller power cable as recited in claim 4, wherein: A sealing groove (52) is formed perpendicular to the length direction of the accommodation groove (51), and the lower sealing member (6) is installed at the sealing groove (52). The lower sealing member (6) and the upper sealing member (31) are arranged on the same circumferential direction of the power cable (4) through the concave structure.

6. A seal for a motor controller power cable as set forth in claim 4, characterized by: Two accommodation grooves (51) are spaced apart and used to install two power cables (4) corresponding to the positive and negative electrodes. A convex column (53) is formed on the terminal box (5) between the two accommodation grooves (51), and the top surface of the convex column (53) is tightly attached to the sealing gasket (3). A locking screw (1) penetrates the upper cover plate (2) and the sealing gasket (3) from top to bottom and is locked to the convex column (53).

7. A seal for a motor controller power cable as set forth in claim 4, wherein: A fastener one (10) penetrates the upper cover plate (2) and the sealing gasket (3) and is locked to the terminal box (5).

8. A seal for a motor controller power cable as set forth in claim 1, wherein: A fastener two (11) penetrates the terminal box (5) and is locked to the shell (8).

9. A seal for a motor controller power cable as set forth in claim 1, characterized by: The shell (8) extends downward to form a lower flange (81) at the lower aperture of the through hole, and a sealing ring (7) is installed between the outer circumferential surface of the electrically conductive column (9) and the inner wall surface of the upper through hole of the shell (8), forming a sealing structure between the electrically conductive column (9) and the shell (8).

10. A seal for a motor controller power cable as set forth in claim 9, characterized by: The electrically conductive column (9) has a stepped surface along the circumferential direction, forming a small diameter part and a large diameter part. The small diameter part of the electrically conductive column (9) is installed inside the terminal box (5) and connected with the power cable (4). The terminal box (5) extends downward along the circumferential direction of the electrically conductive column (9) to form an inner flange (54), which extends into the through hole of the shell (8). The bottom surface of the inner flange (54) and the top surface of the stepped surface are respectively attached to the upper and lower ends of the sealing ring (7).

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