Bridge with high sealing performance

Abstract

The utility model relates to bridge equipment, in particular to a bridge with high sealing performance. The end cover is assembled on the opening end of the metal shell in a sliding mode, then locking after assembly is carried out in cooperation with a small number of screws, and finally through cooperation of the sealing sleeve, namely, the sealing sleeve is arranged on the top face of the metal shell in a sleeving mode and wraps the whole end cover and the through hole, so that all joints are located in the sealing sleeve. Compared with the existing product, the assembly of the end cover and the shell needs more than 8 screws for locking, and even 12 or 14 screws are needed. According to the scheme, only a small number (less than 8) of screws are needed for locking, the sealing performance requirement (reaching IP67 or above) is met under the condition that secondary sealing is met, and meanwhile rapid assembly of the end cover is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of bridges, in particular to a bridge with strong sealing performance. Background Art

[0002] According to the phase difference of the output ports, bridges can be divided into 90° phase-shifting bridges and 180° phase-shifting bridges. The 90° phase-shifting bridge is generally realized by parallel coupled lines, which is characterized by a wide operating frequency band and high port isolation. The 180° phase-shifting bridge is generally realized by a ring bridge. The main function of the ring bridge is signal synthesis and splitting, and it has the advantages of small size and low cost. The 180° phase-shifting bridge is widely used in the field of mobile communication. For example, in a specific antenna-feeder system, the 180° phase-shifting bridge can realize in-phase output signals or anti-phase output signals.

[0003] In the actual use process, it is required that the bridge has a certain sealing level. Therefore, the existing bridges are assembled by covering the upper and lower end caps and tightly locked with at least 8 or more screws, even 12 or 14 screws, to ensure the sealing performance. However, this method greatly reduces the assembly efficiency. At the same time, a large number of screw lockings are likely to increase the probability of assembly errors or incomplete assembly, thereby affecting the product sealing performance. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a bridge with strong sealing performance.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A bridge with strong sealing performance includes a cuboid-shaped metal shell and a sealing sleeve with an edge. Components forming the bridge are arranged in the metal shell. The top surface of the metal shell has an opening and an end cap arranged at the opening. On a group of two opposite inner sidewalls of the opening edge, chutes parallel to the top surface are arranged. On one of the inner sidewalls of the other group of the opening edge, a first strip-shaped groove parallel to the top surface is arranged. On the outer surface of the sidewall opposite to the sidewall where the first strip-shaped groove is located, a second strip-shaped groove is arranged. On the side surface of the end cap, a first strip-shaped convex edge adapted to the chute, a second strip-shaped convex edge adapted to the first strip-shaped groove, and a third strip-shaped convex edge adapted to the second strip-shaped groove are arranged. A threaded hole is arranged in the second strip-shaped groove. A through hole for a screw to pass through and be threadedly connected to the threaded hole is arranged on the third strip-shaped convex edge. The sealing sleeve is sleeved on the top surface of the metal shell and covers the end cap and the through hole.

[0007] Further, a tightening part is arranged at the edge of the sealing sleeve.

[0008] Further, an annular groove is provided on the outer side wall of the metal housing, and the edge of the sealing sleeve is embedded in the annular groove.

[0009] Further, an adsorption element is provided in the annular groove, and the edge of the sealing sleeve is matched with the adsorption element so that the edge of the sealing sleeve is closely attached to the annular groove.

[0010] Further, the number of the through holes is two, and the two through holes are symmetrically distributed with respect to the central axis of the metal housing.

[0011] Further, elastic sealing strips are provided on both the first strip-shaped convex edge and the second strip-shaped convex edge. The elastic sealing strip on the first strip-shaped convex edge is used to contact the sliding groove, and the elastic sealing strip on the second strip-shaped convex edge is used to contact the first strip-shaped groove.

[0012] Further, one end of the sliding groove close to the second strip-shaped groove has a flared opening for guiding.

[0013] Further, positioning holes are provided in the first strip-shaped groove, and positioning columns adapted to and arranged in one-to-one correspondence with the positioning holes are provided on the second strip-shaped convex edge.

[0014] Further, the number of the positioning holes is two, and the two positioning holes are horizontally spaced and symmetrically distributed with respect to the central axis of the metal housing.

[0015] The beneficial effects of the present utility model are as follows:

[0016] A bridge with strong sealing performance provided by the present utility model assembles the end cover on the open end of the metal housing in a sliding manner, and then cooperates with a small number of screws for locking after assembly. Finally, through the cooperation of the sealing sleeve, that is, the sealing sleeve is sleeved on the top surface of the metal housing and covers the entire end cover and the through holes, so that all joints are located within the sealing sleeve. Compared with the existing products, the assembly of the end cover and the housing of the existing products requires more than 8 screws for locking, even 12 or 14 screws. However, only a small number (less than 8) of screws are required for locking in this solution. Under the condition of meeting the secondary sealing, it meets the sealing requirements (reaching above IP67), and at the same time, it is convenient for the rapid assembly of the end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure shows a schematic structural diagram of a bridge with strong sealing performance of the present utility model;

[0018] Figure 2 The figure shows an exploded structural diagram of a bridge with strong sealing performance of the present utility model;

[0019] Figure 3 The figure shows a top view of a bridge with strong sealing performance of the present utility model;

[0020] Figure 4 as shown Figure 3 a cross-sectional view taken along line C-C in

[0021] Figure 5 as shown Figure 3 a cross-sectional view taken along line A-A in

[0022] Figure 6 as shown Figure 1 a cross-sectional view of

[0023] Figure 7 as shown Figure 6 a partial enlarged view at B in

[0024] Explanation of the reference numerals in the drawings:

[0025] 1 - metal housing; 11 - opening; 111 - sliding groove; 1111 - flared opening; 112 - first strip-shaped groove; 1121 - positioning hole; 113 - second strip-shaped groove; 1131 - threaded hole; 12 - end cap; 121 - first strip-shaped flange; 122 - second strip-shaped flange; 1221 - positioning post; 123 - third strip-shaped flange; 1231 - through hole; 13 - elastic sealing strip; 14 - screw; 15 - annular groove; 2 - sealing sleeve; 3 - interface. Specific embodiments

[0026] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments as follows:

[0027] As Figures 1 - 7 shown, a bridge with strong sealing performance provided by the present utility model includes a cuboid-shaped metal housing and a sealing sleeve with an edge. Components forming the bridge are provided inside the metal housing. The top surface of the metal housing has an opening and an end cap provided at the opening. A sliding groove parallel to the top surface is provided on each of a set of two opposite inner sidewalls of the opening edge. A first strip-shaped groove parallel to the top surface is provided on one of the other set of inner sidewalls of the opening edge. A second strip-shaped groove is provided on the outer surface of the sidewall opposite to the sidewall where the first strip-shaped groove is located. A first strip-shaped flange adapted to the sliding groove, a second strip-shaped flange adapted to the first strip-shaped groove, and a third strip-shaped flange adapted to the second strip-shaped groove are provided on the side surface of the end cap. A threaded hole is provided in the second strip-shaped groove. A through hole for a screw to pass through and be threadedly connected to the threaded hole is provided on the third strip-shaped flange. The sealing sleeve is sleeved on the top surface of the metal housing and covers the end cap and the through hole.

[0028] As can be seen from the above description, the utility model has the following beneficial effects: A bridge with strong sealing performance provided by the utility model assembles the end cover on the open end of the metal shell in a sliding manner, and then cooperates with a small number of screws for locking after assembly. Finally, through the cooperation of the sealing sleeve, that is, the sealing sleeve is sleeved on the top surface of the metal shell and covers the entire end cover and the through hole, so that all joints are located within the sealing sleeve. Compared with existing products, the assembly of the end cover and the shell requires more than 8 screws for locking, even 12 or 14 screws. However, this solution only requires a small number (less than 8) of screws for locking, which can meet the sealing requirements (reach above IP67) while satisfying secondary sealing, and at the same time facilitates the rapid assembly of the end cover.

[0029] Further, a tightening portion is provided at the edge of the sealing sleeve.

[0030] As can be seen from the above description, by providing the tightening portion, the sealing performance can be further improved.

[0031] Further, an annular groove is provided on the outer side wall of the metal shell, and the edge of the sealing sleeve is embedded in the annular groove.

[0032] As can be seen from the above description, through the above structural design, not only the sealing performance can be improved, but also the assembly stability of the sealing sleeve and the metal shell can be improved.

[0033] Further, an adsorption element is provided in the annular groove, and the edge of the sealing sleeve is matched with the adsorption element so that the edge of the sealing sleeve is closely attached to the annular groove.

[0034] As can be seen from the above description, through the above structural design, the tightness between the sealing sleeve and the metal shell can be further improved, that is, the sealing performance can be improved.

[0035] Further, the number of the through holes is two, and the two through holes are symmetrically distributed along the central axis of the metal shell.

[0036] As can be seen from the above description, through the above structural design, only two screws are required to complete the locking.

[0037] Further, elastic sealing strips are provided on both the first strip-shaped convex edge and the second strip-shaped convex edge. The elastic sealing strip on the first strip-shaped convex edge is used to contact the sliding groove, and the elastic sealing strip on the second strip-shaped convex edge is used to contact the first strip-shaped groove.

[0038] As can be seen from the above description, through the above structural design, the sealing performance can be further improved.

[0039] Further, one end of the sliding groove close to the second strip-shaped groove has a flared opening for guiding.

[0040] As can be seen from the above description, through the above structural design, the rapid insertion of the end cap can be facilitated.

[0041] Further, positioning holes are provided in the first strip-shaped groove, and positioning posts adapted to and corresponding to the positioning holes one by one are provided on the second strip-shaped convex edge.

[0042] As can be seen from the above description, through the cooperation of the positioning holes and the positioning posts, the accuracy of assembly is ensured, thereby ensuring the sealing performance.

[0043] Further, the number of the positioning holes is two, and the two positioning holes are horizontally spaced and symmetrically distributed about the central axis of the metal housing.

[0044] As can be seen from the above description, the number of the positioning holes is two, meeting the requirements of assembly accuracy.

[0045] The following lists several preferred embodiments or application embodiments to help those skilled in the art better understand the technical content of the present invention and the technical contributions made by the present invention compared with the prior art:

[0046] Preferred Embodiment 1:

[0047] As Figures 1 to 7 , a bridge with strong sealing performance provided by the present invention includes a rectangular parallelepiped-shaped metal housing 1 and a sealing sleeve 2 with an edge. Components forming a bridge are provided in the metal housing 1. Four interfaces 3 are provided on the outer side wall of the metal housing 1, and the interfaces are electrically connected to the internal components. Every two interfaces form a group and are respectively located on two opposite side surfaces.

[0048] The top surface of the metal housing 1 has an opening 11 and an end cap 12 provided at the opening. A pair of opposite inner side walls at the edge of the opening 11 are both provided with sliding grooves 111 parallel to the top surface. One end of the sliding groove 111 close to the second strip-shaped groove has a flared opening 1111 for guiding, which can facilitate the rapid insertion of the end cap. One of a pair of opposite inner side walls at the edge of the opening 11 is provided with a first strip-shaped groove 112 parallel to the top surface, and the outer surface of the side wall opposite to the side wall where the first strip-shaped groove is located is provided with a second strip-shaped groove 113. Positioning holes 1121 are provided in the first strip-shaped groove 112, and can also be provided on the end face of the groove wall of the second strip-shaped groove. Specifically, the number of the positioning holes 1121 is two, and the two positioning holes are horizontally spaced and symmetrically distributed about the central axis of the metal housing.

[0049] On the side surface of the end cap 12, there are provided a first strip-shaped convex edge 121 adapted to the sliding groove, a second strip-shaped convex edge 122 adapted to the first strip-shaped groove, and a third strip-shaped convex edge 123 adapted to the second strip-shaped groove. Among them, elastic sealing strips 13 are provided on both the first strip-shaped convex edge and the second strip-shaped convex edge. The cross-sectional shape of the elastic sealing strip is semi-circular. One flat end of the elastic sealing strip corresponding to the semi-circle is in close contact with the lower end surfaces of the first strip-shaped convex edge and the second strip-shaped convex edge, and can be attached by adhesive. The arc surface of the elastic sealing strip on the first strip-shaped convex edge corresponding to the semi-circle is used to contact the sliding groove, and the arc surface of the elastic sealing strip on the second strip-shaped convex edge corresponding to the semi-circle is used to contact the first strip-shaped groove. On the second strip-shaped convex edge 122, there are provided positioning posts 1221 adapted to and arranged in one-to-one correspondence with the positioning holes 1121. In this solution, the number of positioning posts is also two. The positioning posts are cylindrical, and a tip is provided at the top of the cylindrical shape, which is convenient for embedding into the positioning holes. Through the cooperation of the positioning holes and the positioning posts, the accuracy of assembly is ensured, thereby ensuring the sealing performance.

[0050] Threaded holes 1131 are provided in the second strip-shaped groove 113. Through holes 1231 for screws 14 to pass through and be threadedly connected to the threaded holes are provided on the third strip-shaped convex edge 123. The number of the through holes 1231 is two, and the two through holes are symmetrically distributed with respect to the central axis of the metal housing. The number of the threaded holes 1131 is equal to and arranged in one-to-one correspondence with the number of the through holes 1231, that is, they are coaxially arranged.

[0051] The sealing sleeve 2 can adopt an existing sleeve-shaped product with sealing performance. The sealing sleeve 2 is sleeved on the top surface of the metal housing and covers the end cap 12 and the through holes 1231. A tightening portion is provided at the edge of the sealing sleeve 2. By providing the tightening portion, the sealing performance can be further improved. An annular groove 15 is provided on the outer side wall of the metal housing 1. A protrusion is provided on the inner side wall of the edge of the sealing sleeve 2. The protrusion is embedded in the annular groove 15, which can not only improve the sealing performance but also improve the stability of the assembly of the sealing sleeve and the metal housing.

[0052] An adsorption element is provided in the annular groove. The edge of the sealing sleeve is matched with the adsorption element so that the edge of the sealing sleeve is closely attached to the annular groove, which can further improve the tightness between the sealing sleeve and the metal housing, that is, improve the sealing performance.

[0053] The present utility model has been described by the above related embodiments and the accompanying drawings. However, the above embodiments are only examples for implementing the present utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the present utility model. On the contrary, modifications and equivalent arrangements included in the spirit and scope of the claims are all included in the scope of the present utility model.

Claims

1. A highly sealed bridge, characterized in that: It comprises a rectangular metal shell and a sealing sleeve with an edge, wherein components constituting an electric bridge are arranged in the metal shell, the top surface of the metal shell has an opening and an end cover arranged at the opening, a group of two opposite inner side walls of the edge of the opening are each provided with a slide groove parallel to the top surface, one of the other group of opposite inner side walls of the edge of the opening is provided with a first strip groove parallel to the top surface, the outer surface of the side wall opposite to the side wall where the first strip groove is located is provided with a second strip groove, the side surface of the end cover is provided with a first strip convex edge matched with the slide groove, a second strip convex edge matched with the first strip groove and a third strip convex edge matched with the second strip groove, a threaded hole is provided in the second strip groove, and a through hole for a screw to pass through and be threadedly connected with the threaded hole is provided on the third strip convex edge, and the sealing sleeve is sleeved on the top surface of the metal shell and covers the end cover and the through hole.

2. A highly sealed bridge according to claim 1, characterized in that: A tightening portion is provided at the edge of the sealing sleeve.

3. A highly sealed bridge according to claim 1, characterized in that: An annular groove is provided on the outer side wall of the metal shell, and the edge of the sealing sleeve is embedded in the annular groove.

4. A highly sealed bridge according to claim 3, characterized in that: An adsorption element is arranged in the annular groove, and the edge of the sealing sleeve cooperates with the adsorption element so that the edge of the sealing sleeve is tightly fitted in the annular groove.

5. The highly sealed electric bridge according to claim 3, characterized in that: The number of the through holes is two, and the two through holes are symmetrically distributed about the central axis of the metal shell.

6. A highly sealed bridge according to claim 1, characterized in that: The first strip convex edge and the second strip convex edge are both provided with elastic sealing strips. The elastic sealing strip on the first strip convex edge is used to contact with the slide groove, and the elastic sealing strip on the second strip convex edge is used to contact with the first strip groove.

7. A highly sealed bridge according to claim 1, characterized in that: One end of the slide slot close to the second strip groove has a bell mouth for guiding.

8. The highly sealed electric bridge according to claim 1, characterized in that: A positioning hole is provided in the first strip-shaped groove, and a positioning column adapted to the positioning hole and arranged in one-to-one correspondence is provided on the second strip-shaped convex edge.

9. A highly sealed bridge according to claim 8, characterized in that: The number of the positioning holes is two, and the two positioning holes are horizontally spaced and symmetrically distributed about the central axis of the metal shell.

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