A sealed waterproof junction box suitable for rail transit underframe

Abstract

This application discloses a sealed and waterproof junction box suitable for rail transit underframes, relating to the field of rail transit technology. The sealed and waterproof junction box includes: a cover with a flanged structure around its perimeter; multiple bolt holes on the cover corresponding to the orientation of closed-type rivet nuts, and a sealing gasket on its inner wall; a box body matching the cover, with a flanged structure on the inner edge of its top opening, and a closed-type conduit between the flanged structure and the bottom of the box body; and multiple closed-type rivet nuts embedded in the flanged structure. This application enhances the sealing and protection effect of the cover and box body through the flanged structure of the cover, and uses the closed-type conduit between the flanged edge and the bottom of the box body to isolate and drain water or moisture from the cover, preventing it from entering the box body, thus meeting the waterproof requirements of junction boxes for rail transit vehicle underframe equipment.

Description

Technical Field

[0001] This application relates to the field of rail transit technology, specifically to a sealed and waterproof junction box suitable for rail transit underframes. Background Technology

[0002] Currently, junction boxes used for electrical connections in rail transit vehicle underframe equipment are prone to water leakage during vehicle operation or maintenance cleaning due to rainwater and cleaning sprays. This leakage damages electrical insulation and causes equipment malfunctions. While there are many ways to prevent water ingress into junction boxes, using sealing strips and sealant is a commonly used method in actual manufacturing. However, most junction boxes rely on sealing strips between the cover and body for waterproofing, which cannot completely prevent leakage after the sealing strip ages or at installation fasteners. Therefore, a new design structure for waterproof sealing is needed to meet the waterproofing requirements of junction boxes in rail transit vehicle underframe equipment.

[0003] To meet practical needs, a sealed and waterproof junction box suitable for rail transit underframes is provided. Summary of the Invention

[0004] To address the deficiencies in existing technologies, the purpose of this application is to provide a sealed and waterproof junction box suitable for rail transit underframes. The sealing and protection effect of the box cover and box body is enhanced by the flanged structure of the box cover, and the closed conduit between the flanged edge and the bottom of the box body is used to isolate and drain water or moisture on the box cover, preventing it from entering the box body, thus meeting the waterproof requirements of junction boxes for rail transit vehicle underframe equipment.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] This application provides a sealed and waterproof junction box suitable for rail transit underframes, the sealed and waterproof junction box comprising:

[0007] The box cover has a plate structure. A first flange baffle with an annular structure is arranged around the bottom surface of the box cover. The first flange baffle is perpendicular to the box cover. An annular sealing gasket is arranged on the bottom surface of the box cover. The outer edge of the annular sealing gasket contacts the inner wall of the first flange baffle. A plurality of first threaded through holes for the box cover are evenly arranged on the edge of the box cover. A plurality of first sealing gasket through holes are evenly arranged on the annular sealing gasket. The first threaded through holes for the box cover correspond one-to-one with the first sealing gasket through holes.

[0008] A box body that matches the box cover has a box body opening on the top surface. A second flange baffle is arranged around the inner edge of the box body opening. The second flange baffle is parallel to the bottom surface of the box body. Closed-type rivet nuts are evenly arranged on the second flange baffle. Multiple closed-type conduits are arranged inside the box body. Multiple mounting threaded through holes are arranged on the bottom surface of the box body. The number of closed-type conduits is the same as the number of mounting threaded through holes.

[0009] Multiple screws, one screw corresponding to one closed-type rivet nut;

[0010] When the lid is placed on the box body, the screw passes through the corresponding first threaded through hole of the lid and the first through hole of the sealing gasket, and is connected to the closed rivet nut.

[0011] When the lid is placed on the box body, the positions of the closed rivet nut, the first threaded through hole of the lid, and the first through hole of the sealing gasket correspond one-to-one.

[0012] The length direction of the closed conduit is perpendicular to the box cover and the bottom plate of the box body;

[0013] The opening at the upper end of the closed conduit is located on the second flange baffle and communicates with the outside;

[0014] The opening at the lower end of the closed conduit is connected to the mounting threaded through hole.

[0015] Based on the above technical solution, a cable sealing joint mounting hole is provided on one side of the box.

[0016] Based on the above technical solution, a connector mounting hole is provided on one side of the box body;

[0017] The connector mounting hole and the cable sealing joint mounting hole are respectively located on a set of symmetrical sides of the housing.

[0018] Compared with the prior art, the advantages of this application are:

[0019] This application strengthens the tightness between the cover and the box body through a flanged structure, and uses a closed conduit in the flanged area to isolate and drain water or moisture on the cover, preventing it from entering the box body, thus meeting the waterproof requirements of the junction box of the rail transit vehicle underframe equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of a sealed and waterproof junction box applicable to rail transit underframes, according to an embodiment of this application.

[0022] Figure 2 This is an exploded structural diagram of a sealed and waterproof junction box suitable for rail transit underframes, according to an embodiment of this application.

[0023] Figure 3 This is a bottom view of a sealed and waterproof junction box for rail transit underframe according to an embodiment of this application;

[0024] In the picture:

[0025] 1. Box cover; 10. First flange baffle; 11. Annular sealing gasket; 12. First threaded through hole of box cover; 13. First through hole of sealing gasket; 2. Box body; 20. Box body opening; 21. Second flange baffle; 22. Closed rivet nut; 23. Closed conduit; 24. Mounting threaded through hole; 3. Screw; 4. Cable sealing joint mounting hole; 5. Connector mounting hole. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] The embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0028] This application provides a sealed and waterproof junction box suitable for rail transit underframes. The flanged structure enhances the tightness between the cover and the box body. The closed conduit on the flanged side of the box body isolates and drains water or moisture from the cover, preventing it from entering the box body, thus meeting the waterproof requirements of junction boxes for rail transit vehicle underframe equipment.

[0029] To achieve the aforementioned technical effects, the overall concept of this application is as follows:

[0030] A sealed and waterproof junction box suitable for rail transit underframes, the sealed and waterproof junction box comprising:

[0031] The box cover 1 has a plate structure. A first flange baffle 10 with an annular structure is arranged around the bottom surface of the box cover 1. The first flange baffle 10 is perpendicular to the box cover 1. An annular sealing gasket 11 is arranged on the bottom surface of the box cover 1. The outer edge of the annular sealing gasket 11 contacts the inner wall of the first flange baffle 10. A plurality of box cover first threaded through holes 12 are evenly arranged on the edge of the box cover 1. A plurality of sealing gasket first through holes 13 are evenly arranged on the annular sealing gasket 11. The box cover first threaded through holes 12 and the sealing gasket first through holes 13 correspond one-to-one.

[0032] A box body 2 that matches the box cover 1 has a box body opening 20 on its top surface. A second flange baffle 21 is arranged around the inner edge of the box body opening 20. The second flange baffle 21 is parallel to the bottom surface of the box body 2. Closed-type rivet nuts 22 are evenly arranged on the second flange baffle 21. Multiple closed-type conduits 23 are arranged inside the box body 2. Multiple mounting threaded through holes 24 are arranged on the bottom surface of the box body 2. The number of closed-type conduits 23 is the same as the number of mounting threaded through holes 24.

[0033] Multiple screws 3, one screw 3 corresponding to one closed-type rivet nut 22;

[0034] When the box cover 1 is placed on the box body 2, the screw 3 passes through the corresponding first threaded through hole 12 of the box cover and the first through hole 13 of the sealing gasket, and is connected to the closed rivet nut 22.

[0035] When the box cover 1 is placed on the box body 2, the positions of the closed rivet nut 22, the first threaded through hole 12 of the box cover, and the first through hole 13 of the sealing gasket correspond one-to-one.

[0036] The length direction of the closed conduit 23 is perpendicular to the bottom plate of the cover 1 and the body 2;

[0037] The opening at the upper end of the closed conduit 23 is provided on the second flange baffle 21 and communicates with the outside;

[0038] The opening at the lower end of the closed conduit 23 is connected to the mounting threaded through hole 24.

[0039] The embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0040] See Figures 1-3 As shown in the figure, this application embodiment provides a sealed and waterproof junction box suitable for rail transit underframes, the sealed and waterproof junction box comprising:

[0041] The box cover 1 has a plate structure. A first flange baffle 10 with an annular structure is arranged around the bottom surface of the box cover 1. The first flange baffle 10 is perpendicular to the box cover 1. An annular sealing gasket 11 is arranged on the bottom surface of the box cover 1. The outer edge of the annular sealing gasket 11 contacts the inner wall of the first flange baffle 10. A plurality of box cover first threaded through holes 12 are evenly arranged on the edge of the box cover 1. A plurality of sealing gasket first through holes 13 are evenly arranged on the annular sealing gasket 11. The box cover first threaded through holes 12 and the sealing gasket first through holes 13 correspond one-to-one.

[0042] A box body 2 that matches the box cover 1 has a box body opening 20 on its top surface. A second flange baffle 21 is arranged around the inner edge of the box body opening 20. The second flange baffle 21 is parallel to the bottom surface of the box body 2. Closed-type rivet nuts 22 are evenly arranged on the second flange baffle 21. Multiple closed-type conduits 23 are arranged inside the box body 2. Multiple mounting threaded through holes 24 are arranged on the bottom surface of the box body 2. The number of closed-type conduits 23 is the same as the number of mounting threaded through holes 24.

[0043] Multiple screws 3, one screw 3 corresponding to one closed-type rivet nut 22;

[0044] When the box cover 1 is placed on the box body 2, the screw 3 passes through the corresponding first threaded through hole 12 of the box cover and the first through hole 13 of the sealing gasket, and is connected to the closed rivet nut 22.

[0045] When the box cover 1 is placed on the box body 2, the positions of the closed rivet nut 22, the first threaded through hole 12 of the box cover, and the first through hole 13 of the sealing gasket correspond one-to-one.

[0046] The length direction of the closed conduit 23 is perpendicular to the bottom plate of the cover 1 and the body 2;

[0047] The opening at the upper end of the closed conduit 23 is provided on the second flange baffle 21 and communicates with the outside;

[0048] The opening at the lower end of the closed conduit 23 is connected to the mounting threaded through hole 24.

[0049] It should be noted that, in specific operation, the edge of the opening at the lower end of the closed conduit 23 is welded to the edge of the mounting threaded through hole 24, thereby connecting the two.

[0050] In this embodiment, the tightness between the cover and the box body is enhanced by the flanged structure, and the closed conduit in the flanged area is used to isolate and drain water or moisture on the cover to prevent it from entering the box body, thus meeting the waterproof requirements of the junction box of the rail transit vehicle underframe equipment.

[0051] Furthermore, a cable sealing connector mounting hole 4 is provided on one side of the box body 2.

[0052] Furthermore, a connector mounting hole 5 is provided on one side of the housing 2;

[0053] The connector mounting hole 5 and the cable sealing joint mounting hole 4 are respectively located on a set of symmetrical sides of the housing 2.

[0054] As shown in the attached diagram of the instruction manual. Figure 1 As shown, the sealed and waterproof junction box suitable for rail transit underframes mainly includes:

[0055] The overall shape of the cover 1, the body 2, and the built-in internal terminal block is the same as that of a conventional junction box, which is square in shape, and the installation interface is the same as that of a conventional junction box.

[0056] The sealed and waterproof junction box applicable to the rail transit underframe in this embodiment of the application has a waterproof and dustproof function that is mainly different from that of a conventional junction box in that the inner edge of the opening on the top surface of the box body 2 is provided with a second flange baffle 21, and multiple closed rivet nuts 22 are embedded on the second flange baffle 21.

[0057] Specifically, the second flange baffle 21 is provided with a box cover fastener mounting hole, and the closed rivet nut 22 is built into the box cover fastener mounting hole. The box body fastener mounting hole is an isolated and closed structure, which can be used for electrical installation of rail transit underframe equipment to achieve moisture-proof, waterproof and dustproof, and reduce the failure rate of electrical equipment.

[0058] The inner edge of the opening on the top surface of the box body 2 is provided with a second flange baffle 21, and the inner wall of the box cover 1 is provided with an annular sealing gasket 11. The second flange baffle 21 surrounds and covers the annular sealing gasket 11. The closed conduit 23 is installed by opening a hole on the bent structure plane of the box body 2. The two ends of the closed conduit 23 are welded to the bent surface of the box body and the bottom of the box body, respectively, to form a through hole. The installation threaded through hole 24 is opened on the box body 2 at the bottom of the through hole.

[0059] The second flange baffle 21, in conjunction with the annular sealing gasket 11, effectively prevents rainwater and cleaning water from splashing into the gap between the junction box cover 1 and the box body 2, thus preventing moisture accumulation and seepage into the junction box. The mounting threaded through hole 24 is located within the closed conduit 23 with an isolation and sealing structure, preventing moisture and accumulated water from outside the junction box from seeping into the junction box through the fastener threads.

[0060] The screw 3 is fixed inside the closed rivet nut 22, which blocks the water vapor infiltration channel. Even if water around the screw 3 seeps in along the threads of the first threaded through hole 12 of the box cover, it will not enter the box.

[0061] The above three measures, when implemented, ensure that the sealed waterproof junction boxes used in rail transit underframes achieve an IP68 rating for moisture-proof, waterproof, and dust-proof performance, making them highly practical in rail transit vehicle underframe equipment areas.

[0062] The advantages of the technical solution based on the embodiments of this application are as follows:

[0063] 1. The contact surface between the lid 1 and the body 2 is a plane with the same width as the sealing gasket. The annular sealing gasket 11 is installed on the contact surface between the lid 1 and the body 2. The annular sealing gasket 11 with a certain width is sandwiched between the lid 1 and the body 2. It is made of silicone gasket that is not easy to age and has good durability. It has appropriate hardness and plays a good sealing role.

[0064] 2. The inner edge of the opening on the top surface of the box 2 is provided with a second flange baffle 21 to isolate the annular sealing gasket 11 from direct contact with the outside. The second flange baffle 21 on the inner edge of the opening on the top surface of the box 2 forms a protective barrier between the side of the annular sealing gasket 11 and the box 2, preventing rainwater and cleaning spray from contacting the gap between the box cover 1 and the box 2 and the annular sealing gasket 11. Rainwater / cleaning water and moisture on the side and top of the junction box cannot directly contact the gap between the box cover 1 and the box 2 and the annular sealing gasket 11, preventing water vapor from entering the junction box and preventing the annular sealing gasket 11 from being corroded and aged due to water vapor.

[0065] 3. The enclosure is installed by welding the closed conduit 23 into the enclosure. The top of the closed conduit 23 is welded to the opening on the bent surface of the enclosure 2, and the bottom of the closed conduit 23 is welded to the enclosure. The mounting threaded through hole 24 is installed inside the closed conduit 23 and is isolated from the internal space of the enclosure 2. Even if water is soaked in the fasteners, it cannot seep into the inside of the junction box.

[0066] 4. The mounting fastener of the cover 1, namely the screw 3, is connected to the closed rivet nut 22 of the box body 2. Water seepage at the fastener will not enter the junction box through the thread gap.

[0067] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0068] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0069] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A sealed waterproof junction box suitable for rail transit chassis, characterized in that, The sealed and waterproof junction box includes: A box cover (1) with a plate structure, wherein a first flange baffle (10) with an annular structure is arranged around the bottom surface of the box cover (1), the first flange baffle (10) is perpendicular to the box cover (1), an annular sealing gasket (11) is arranged on the bottom surface of the box cover (1), the outer edge of the annular sealing gasket (11) is in contact with the inner wall of the first flange baffle (10), a plurality of box cover first threaded through holes (12) are evenly arranged on the edge of the box cover (1), a plurality of sealing gasket first through holes (13) are evenly arranged on the annular sealing gasket (11), and the box cover first threaded through holes (12) and the sealing gasket first through holes (13) correspond one-to-one; A box body (2) that matches the box cover (1) has a box body opening (20) on its top surface. A second flange baffle (21) is arranged around the inner edge of the box body opening (20). The second flange baffle (21) is parallel to the bottom surface of the box body (2). Closed rivet nuts (22) are evenly arranged on the second flange baffle (21). Multiple closed conduits (23) are arranged inside the box body (2). Multiple mounting threaded through holes (24) are arranged on the bottom surface of the box body (2). The number of closed conduits (23) is the same as the number of mounting threaded through holes (24). Multiple screws (3), one screw (3) corresponds to one closed-type rivet nut (22); When the box cover (1) is placed on the box body (2), the screw (3) passes through the corresponding first threaded through hole (12) of the box cover and the first through hole (13) of the sealing gasket, and is connected to the closed rivet nut (22); When the box cover (1) is placed on the box body (2), the orientations of the closed rivet nut (22), the first threaded through hole (12) of the box cover, and the first through hole (13) of the sealing gasket correspond one-to-one. The length direction of the closed conduit (23) is perpendicular to the bottom plate of the cover (1) and the body (2); The opening at the upper end of the closed conduit (23) is located on the second flange baffle (21) and communicates with the outside; The opening at the lower end of the closed conduit (23) is connected to the mounting threaded through hole (24).

2. The sealed and waterproof junction box for rail transit underframe as described in claim 1, characterized in that: The box (2) has a cable sealing joint mounting hole (4) on one side.

3. The sealed and waterproof junction box for rail transit underframe as described in claim 2, characterized in that: The box body (2) has a connector mounting hole (5) on one side; The connector mounting hole (5) and the cable sealing joint mounting hole (4) are respectively located on a set of symmetrical sides of the housing (2).

Images