Coupler assembly

Abstract

The coupler assembly comprises an upper coupler and a lower coupler which are matched with each other, the bottom of a shell of the upper coupler is recessed upwards to form an accommodating cavity, a first row of pin groups and a second row of pin groups are arranged in the accommodating cavity, and the number of pins of the first row of pin groups is larger than that of pins of the second row of pin groups. The contact pins of the two rows of contact pin groups are distributed in a staggered mode to form a trapezoidal structure, wires connected with the contact pins of the second row of contact pin groups can penetrate through gaps between the contact pins of the first row of contact pin groups, and then the wires connected with the contact pins of the first row of contact pin groups extend out of the upper coupler shell on one side of the first row of contact pin groups together with the wires connected with the contact pins of the second row of contact pin groups. A wire connected with the pins of the second row of pin group can be connected with an electronic device on one side of the first row of pin group without being bent, and the phenomena of wire pressing and wire clamping easily occurring on the bent part of the wire in the coupler installation process are avoided. Without bending the lead, the probability of lead damage is reduced, and the service life of the lead is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of couplers, in particular to a coupler component. Background Art

[0002] The existing coupler assembly usually includes an upper coupler and a lower coupler that cooperate with each other. The upper coupler is provided with a pin, and the lower coupler is provided with a plug spring corresponding to the pin. When the upper and lower couplers are plugged together, the pin contacts the plug spring. In practical applications, in order to achieve control of related components, the pins and the springs are usually provided with a number of wires connected to the related components. In the case of multiple rows of pins, the existing upper coupler usually has the wires extending from the upper coupler on both sides of the pins. For example, patent CN201820680091.1 discloses an upper coupler, and the wires connected to the pins extend from different sides of the upper coupler respectively. The electronic device connected to the upper coupler is usually located on one side of the upper coupler, and the wires on the different sides from the electronic device need to be bent and connected to the electronic device. On the one hand, the bending of the wires will make the arrangement of the wiring harness messy. Although a wire slot is provided for placing the bent wires, during the installation and positioning of the upper coupler, part of the wiring harness on one side of the bent wire is still located on the outside of the upper coupler, which is prone to wire pressing or clamping, affecting the installation efficiency, and may damage the insulation layer on the outside of the wire; on the other hand, the wires on the different sides from the electronic device are in a bent state for a long time, and the wires are prone to damage, which reduces the service life of the wires. Utility Model Content

[0003] The utility model provides a coupler assembly, the purpose of which is to reasonably arrange two rows of pins in an upper coupler so that the wires connected by the two rows of pins can extend from one side of the upper coupler and then be connected to the electronic device on one side of the upper coupler, so that the wires on the different side from the electronic device do not need to be bent, thereby solving the problems of wire pressing, wire clamping or wire damage that are easily caused by bending the wires. At the same time, the wires on the same side do not need to be additionally provided with the routing space required for the bent wires, so that the routing space of the wires is reduced, saving the installation space of the coupler.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a coupler assembly, including a matching upper coupler and a lower coupler, the upper coupler including an upper coupler shell, the bottom of the upper coupler shell is recessed upward to form a accommodating cavity, the top wall of the accommodating cavity is provided with a plurality of vertically extending pins, characterized in that: a first row of pin groups and a second row of pin groups are arranged in the accommodating cavity, the pins of the first row of pin groups and the pins of the second row of pin groups are staggered, the number of pins in the first row of pin groups is more than the number of pins in the second row of pin groups, the contours of the first row of pin groups and the second row of pin groups form a trapezoidal structure, a first wire group connected to the pins of the first row of pin groups and a second wire group connected to the pins of the second row of pin groups are arranged in the upper coupler shell, the first wire group and the second wire group both extend from the outer wall of the upper coupler shell on one side of the first row of pin groups.

[0005] Furthermore, the first wire group and the second wire group are located in the same horizontal plane, and the wires of the second wire group pass through the gaps between the pins of the first pin group respectively.

[0006] Furthermore, the connection ends of the pins of the first row of pin groups are at different heights from the connection ends of the pins of the second row of pin groups, so that the first wire group and the second wire group are located in different planes.

[0007] Furthermore, the inner wall of the accommodating cavity is formed with a trapezoidal structure corresponding to the contours of the first row of pin groups and the second row of pin groups, the short side and the side of the trapezoid are connected by an arc, the distance from the short side to the long side of the trapezoid is L1, the length of the long side is L2, the radius of the arc is R, 1 / 3L2≤R≤L1.

[0008] Furthermore, a cantilever is formed by extending outward from the top of the upper coupler shell at one side of the first row of pin groups, and the first wire group and the second wire group extend from the outer end surface of the cantilever.

[0009] Furthermore, the lower coupler includes a lower coupler shell, the bottom of which is recessed upward to form an installation cavity, a sealing gasket is arranged in the installation cavity, a sealing gasket bracket is detachably arranged below the sealing gasket, and the sealing gasket bracket presses the sealing gasket against the inner top wall of the installation cavity.

[0010] Furthermore, the sealing pad bracket includes a bracket body and a sealing pad support plate integrally formed on the top of the bracket body, and the sealing pad bracket presses the sealing pad against the inner top wall of the installation cavity through the sealing pad support plate.

[0011] Furthermore, the lower coupler includes a plug spring fixing frame, and a first plug spring installation slot group corresponding to the first row of plug pin groups and a second plug spring installation slot group corresponding to the second row of plug pin groups are respectively arranged on both sides of the plug spring fixing frame.

[0012] Furthermore, the plug spring fixing frame also includes a sealing pad bracket located between the first plug spring installation slot group and the second plug spring installation slot group, and the first plug spring installation slot group and the second plug spring installation slot group are respectively detachably connected to the sealing pad bracket.

[0013] Furthermore, positioning ribs are provided on both sides of the sealing pad bracket, and the first spring insertion groove group and the second spring insertion groove group are provided with positioning grooves for the positioning ribs to be inserted into.

[0014] After adopting the above technical solution, the following beneficial technical effects are achieved:

[0015] 1. In the utility model, two rows of pin groups with different numbers of pins are arranged in the upper coupler, and the pins of the two rows of pin groups are staggered to form a trapezoidal structure. Similarly, the lower coupler needs to be correspondingly provided with staggered through holes. When the upper and lower couplers are installed and aligned, since the pins and the through holes are arranged in two rows with different numbers, they can only be inserted one by one, which can achieve a fool-proof effect; at the same time, the wires connected to the pins of the second row of pin groups can pass through the gaps between the pins of the first row of pin groups, and then extend from one side of the upper coupler together with the wires connected to the pins of the first row of pin groups, so that the wires connected to the pins of the second row of pin groups can be connected to the electronic devices on one side of the first row of pin groups without bending, avoiding the phenomenon of wire pressing and wire clamping that is easy to occur at the bent part of the wire during the installation of the coupler; at the same time, there is no need to bend the wire, which also reduces the probability of wire damage and increases the service life of the wire; the wires on the same side do not need to be additionally provided with the wiring space required for bending the wire, so that the wiring space of the wire is reduced, saving the installation space of the coupler.

[0016] 2. In the utility model, the connection ends of the pins of the two rows of pin groups have different heights, so that the two wire groups connected to the connection ends of the pins of the two rows of pin groups are located in different planes, and the number of wires in the wire group located in the same plane is relatively small, so that it is not easy for the wires in the same wire group to interfere with each other. At the same time, the two wire groups are located in different planes, so that the wires between different wire groups will not interfere with each other, thereby avoiding the short circuit phenomenon caused by the interference of the wires.

[0017] 3. In the utility model, the inner wall of the accommodating cavity of the upper coupler shell is formed with a trapezoidal structure corresponding to the contours of the two rows of pin groups. The short side and the side of the trapezoid are connected by an arc, so that the shape of the bottom of the upper coupler shell close to the first row of pin groups is different from the shape close to the second row of pin groups. Similarly, the top contour of the lower coupler also needs to be set to a corresponding trapezoidal structure. When installing the upper and lower couplers, the long sides and short sides of the trapezoidal structures of the upper and lower couplers need to be installed one by one, which can also achieve an anti-foolproof effect.

[0018] 4. In the utility model, the top of the upper coupler shell is located on one side of the first row of pin groups and extends outward to form a cantilever. Two wire groups pass through the cantilever and extend from the outer end surface of the cantilever. The cantilever wraps the wires of the two wire groups. The cantilever can be used as a mounting structure to cooperate with other components to achieve the installation of the upper coupler. The cantilever constrains the wire group to prevent the wire from affecting the assembly efficiency when the upper coupler is installed. At the same time, the cantilever can protect the wires therein from being squeezed during the installation process, so that the wires will not be damaged due to squeezing.

[0019] 5. In the utility model, a sealing pad bracket is arranged below the sealing pad in the lower coupler housing, and the sealing pad bracket presses the sealing pad against the inner top wall of the lower coupler housing installation cavity to prevent the sealing pad from loosening and shifting, thereby affecting the sealing effect.

[0020] 6. In the utility model, the plug spring installation slot groups are arranged on both sides of the plug spring fixing frame. During installation, the plug springs are installed in the corresponding plug spring installation slot groups. The number of plug springs in each plug spring installation slot group is small, which can avoid the entanglement of the wires connected to the plug springs in the same plug spring installation slot group, thereby improving the installation efficiency.

[0021] 7. In the utility model, the plug spring installation slot group and the sealing pad bracket are detachably connected. When the plug spring fails, only the plug spring installation slot group corresponding to the failed plug spring needs to be removed, which can improve maintenance efficiency and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] Figure 1 This is a structural exploded diagram of the coupler assembly of the utility model;

[0024] Figure 2 for Figure 1 a side cutaway view of a coupler assembly;

[0025] Figure 3 for Figure 1 A schematic diagram of the structure of an upper coupler in a coupler assembly;

[0026] Figure 4 for Figure 3 A schematic diagram of the structure of the pins and wires of the upper coupler;

[0027] Figure 5 for Figure 3 A schematic diagram of the dimensions of the upper coupler;

[0028] Figure 6 for Figure 3 A side cutaway view of the upper coupler. DETAILED DESCRIPTION

[0029] like Figure 1-Figure 6 As shown, the utility model provides a coupler assembly. The coupler assembly includes an upper coupler 1 and a lower coupler that cooperate with each other, and the upper coupler 1 includes an upper coupler shell 10. The bottom of the upper coupler shell 10 is recessed upward to form an accommodating cavity 11, and a plurality of vertically extending pins are arranged on the top wall of the accommodating cavity 11. The plurality of pins are divided into two pin groups, including a first row of pin groups 101 with a larger number of pins and a second row of pin groups 102 with a smaller number of pins. The pins of the two rows of pin groups are staggered, and the overall profile of the pins is approximately a trapezoidal structure. Since the upper coupler is provided with two rows of pin groups that are staggered, the lower coupler needs to be provided with two rows of staggered through holes correspondingly. The pins of the two rows of pin groups are respectively connected to wires, wherein the wires connected to the pins of the first row of pin group 101 constitute a first wire group 101a, and the wires connected to the pins of the second row of pin group 102 constitute a second wire group 102a. The wires of the first wire group 101a and the second wire group 102a both extend from the outer wall of the upper coupler shell 10 on one side of the first row of pin group 101.

[0030] In this embodiment, the number a of pins of the upper coupler is set according to functional requirements. Taking a=5 as an example, the first row of pin groups 101 includes three pins, and the first wire group 101a connected to the three pins of the first row of pin groups 101 includes three wires. The three wires are perpendicular to the three pins, and the three wires extend from the outer wall of the upper coupler shell 10 on one side of the first row of pin groups 101. The second row of pin groups 102 includes two pins, and the second wire group 102a connected to the two pins of the second row of pin groups 102 includes two wires, and the two wires are perpendicular to the two pins. Since the pins of the two rows of pin groups are staggered, the two wires of the second wire group 102a perpendicular to the pins of the second row of pin groups 102 can respectively pass through the gaps between the three pins of the first row of pin groups 101, and then extend from the outer wall of the upper coupler shell 10 on one side of the first row of pin groups 101 together with the three wires of the first wire group 101a. At this time, the two wire groups are located on the same horizontal plane.

[0031] Through the above structure, when the upper and lower couplers are installed and aligned, since the pins and through holes are arranged in two rows with different numbers, they can only be inserted one by one, which can achieve a fool-proof effect; at the same time, the wires connected to the pins of the second row of pin groups can pass through the gaps between the pins of the first row of pin groups, and then extend from one side of the upper coupler together with the wires connected to the pins of the first row of pin groups, so that the wires connected to the pins of the second row of pin groups can be connected to the electronic devices on one side of the first row of pin groups without bending, avoiding the phenomenon of wire pressing and wire clamping that is easy to occur at the bent part of the wire during the installation of the coupler, and there is no need to bend the wire, which also reduces the probability of wire damage and increases the service life of the wire; the wires on the same side do not need to set up additional wiring space required for the bent wire, so that the wiring space of the wire is reduced, saving the installation space of the coupler.

[0032] Of course, the two wire groups may also be located at different horizontal planes. The three pins of the first row of pin groups 101 are respectively provided with three connection ends connected to the three wires of the first wire group 101a, and the two pins of the second row of pin groups 102 are provided with two connection ends connected to the two wires of the second wire group 102a. The connection ends of the pins of the first row of pin groups 101 and the connection ends of the pins of the second row of pin groups are different in height. Therefore, the first wire group 101a connected to the connection ends of the pins of the first row of pin groups 101 and the second wire group 102a connected to the connection ends of the pins of the second row of pin groups 102 are located at different horizontal planes. Among them, the height of the connection end of the pin of the first row of pin group 101 can be higher or lower than the height of the connection end of the pin of the second row of pin group 102. When the height of the connection end of the pin of the first row of pin group 101 is higher than the height of the connection end of the pin of the second row of pin group 102, the three wires of the first wire group 101a connected with the three pins of the first row of pin group 101 extend from the outer wall of the upper coupler shell 10 on one side of the first row of pin group 101, and the two wires of the second wire group 102a connected with the two pins of the second row of pin group 102 extend from the three pins of the first row of pin group 101, respectively. At this time, the first wire group 101a is located above the second wire group 102a; when the height of the connecting ends of the pins of the first row of pin groups 101 is lower than the height of the connecting ends of the pins of the second row of pin groups 102, the three wires of the first wire group 101a connected with the three pins of the first row of pin groups 101 respectively extend from the outer wall of the upper coupler shell 10 on one side of the first row of pin groups 101, and the two wires of the second wire group 102a connected with the two pins of the second row of pin groups 102 extend from above the pins of the first row of pin groups 101 out of the upper coupler shell 10.

[0033] Through the above structure, the two wire groups connected to the connecting ends of the pins of the two rows of pin groups are located in different planes, and the number of wires in the wire group located in the same plane is relatively small, so that it is not easy for the wires in the same wire group to interfere with each other. At the same time, the two wire groups are located in different planes, so that the wires between different wire groups will not interfere with each other, thereby avoiding the short circuit phenomenon caused by the interference of the wires.

[0034] In this embodiment, since the number of pins in the second row of pin groups 102 is relatively small, the side of the accommodating cavity close to the second row of pin groups may adopt an arc structure. Figure 5 As shown, the inner wall of the accommodating cavity 11 is formed with a trapezoidal structure adapted to the profiles of the pins of the first row of pin groups 101 and the pins of the second row of pin groups 102. The short side d1 of the trapezoid is connected to the side d2 by an arc r. Preferably, the following relationship is satisfied between d1, d2, and r: the length from d1 to d2 is L1, the length of d2 is L2, the radius of r is R, and 1 / 3L2≤R≤L1. The profile of the outer wall of the upper coupler housing 10 near the second row of pin groups can still maintain a right-angle structure, or it can be set to an arc structure adapted to the inner wall of the accommodating cavity.

[0035] Since the inner wall of the accommodating cavity 11 of the upper coupler housing 10 is a trapezoidal structure, the lower coupler that matches the upper coupler 1 also needs to be set to the same shape. Figure 1 As shown, the lower coupler includes a lower coupler housing 20, and the top profile of the lower coupler housing 20 is set to a trapezoidal structure adapted to the inner wall of the accommodating cavity 11. After the upper and lower couplers are assembled, the top of the lower coupler housing 20 extends into the accommodating cavity.

[0036] Through the above structure, when installing the upper and lower couplers, the long sides and short sides of the trapezoidal structure of the upper and lower couplers need to be installed one by one, and the fool-proof effect can also be achieved; in addition, by setting the contour of the outer wall of the upper coupler shell 10 close to the second row of pin groups to an arc structure that is adapted to the inner wall of the accommodating cavity, when installing the upper coupler, a certain amount of installation space can be saved compared to the right-angle structure.

[0037] See also Figure 6 In this embodiment, the top of the upper coupler shell 10 near the first row of pin groups 101 can extend outward to form a cantilever 12. The wires of the first wire group 101a and the second wire group 102a pass through the cantilever 12 and extend from the outer end surface of the cantilever 12. The cantilever wraps the wires of the two wire groups.

[0038] Through the above structure, the cantilever can be used as a mounting structure to cooperate with other components to realize the installation of the upper coupler. For example, in a soymilk machine placed on the machine head, the cantilever can be clamped by the upper cover and the lower cover of the machine head to realize the installation of the upper coupler. There is no need to use screws to fix the upper coupler. At the same time, the cantilever constrains the wire group to prevent unconstrained wires from extending directly from the upper coupler shell, affecting the assembly efficiency during the assembly of the upper cover and the lower cover of the machine head. At the same time, the cantilever can protect the wires from being squeezed during the installation process, so that the wires will not be damaged due to squeezing.

[0039] Of course, the upper coupler housing may not be provided with a cantilever structure.

[0040] In this embodiment, the bottom of the lower coupler housing 20 is recessed upward to form a mounting cavity 21, and a sealing gasket 22 is arranged in the mounting cavity 21, and the contour of the sealing gasket 22 corresponds to the contour of the outer wall at the top of the lower coupler housing 20. A sealing gasket bracket 23 is arranged below the sealing gasket 22, and the sealing gasket bracket 23 presses the sealing gasket 22 against the inner top wall of the mounting cavity 21. Two rows of through holes corresponding to the pins of the first row of pin groups and the pins of the second row of pin groups are arranged at the top of the lower coupler housing 20, and the sealing gasket 22 is provided with two rows of insertion slots corresponding to the through holes. After the sealing gasket bracket 23 presses the sealing gasket 22 tightly, the insertion slots correspond to the through holes.

[0041] The sealing pad bracket 23 may include a bracket body 232 and a sealing pad support plate 231 integrally formed on the top of the bracket body 232. The contour of the sealing pad support plate 231 corresponds to the contour of the sealing pad 22. The sealing pad support plate is provided with a through hole corresponding to the insertion slot. After the sealing pad bracket 23 is pressed against the sealing pad 22 through the sealing pad support plate 231, the through hole, the insertion slot and the through hole correspond in sequence. After the upper and lower couplers are assembled, the pins pass through the through hole, the insertion slot and the through hole in sequence and extend into the installation cavity.

[0042] The sealing pad bracket 23 and the lower coupler housing 20 can be installed by snapping together. A number of convex ribs can be provided on the inner side wall of the installation cavity 21, and a number of corresponding grooves can be provided around the sealing pad support plate 231. A number of corresponding grooves are also provided around the sealing pad. During installation, the sealing pad 22 is placed on the sealing pad support plate 231, and then the corresponding grooves of the sealing pad support plate 231 and the sealing pad 22 are aligned with the convex ribs on the inner side wall of the installation cavity 21, and the sealing pad bracket 23 is pushed into the installation cavity 21 from bottom to top. Of course, a number of grooves can also be provided on the inner side wall of the installation cavity 21, and a number of corresponding convex ribs can be provided around the sealing pad support plate 231 and the sealing pad 22.

[0043] Through the above structure, a sealing pad bracket is provided to press the sealing pad against the inner top wall of the installation cavity, which can stably support the sealing pad and prevent the sealing pad from loosening and shifting, thereby affecting the sealing effect.

[0044] The lower coupler also includes a plug spring fixing frame, and a first plug spring installation slot group 241 corresponding to the first row of pin groups 101 and a second plug spring installation slot group 242 corresponding to the second row of pin groups 102 are respectively arranged on both sides of the plug spring fixing frame. The first plug spring installation slot group 241 and the second plug spring installation slot group 242 can be an integral structure; the plug spring fixing frame can also include a sealing pad bracket 23, and the two plug spring installation slot groups can be respectively installed on both sides of the sealing pad bracket 23. At this time, the two plug spring installation slot groups are respectively detachably connected to the sealing pad bracket.

[0045] The installation of the sealing gasket bracket 23 and the plug-in spring installation groove group can also be carried out in a snap-fit ​​manner. Positioning convex ribs 2321 are respectively provided on both sides of the bracket body 232 of the sealing gasket bracket 23, and positioning grooves 2411 are provided at the positions corresponding to the ribs of the two plug-in spring installation groove groups. During installation, the positioning grooves 2411 of the plug-in spring installation groove group are aligned with the positioning convex ribs 2321 on both sides of the bracket body 232, so that the positioning grooves 2411 and the positioning convex ribs 2321 are snapped together to complete the installation of the plug-in spring installation groove group and the sealing gasket bracket.

[0046] The plug spring installation groove group and the lower coupler housing 20 can be connected by snaps. The other side of the two plug spring installation groove groups opposite to the positioning groove 2411 is provided with a groove corresponding to the convex rib of the inner wall of the installation cavity 21, and a snap is provided below the groove. The side wall of the lower coupler housing is provided with a mounting opening for the snap to snap in. After the sealing pad bracket 23 is installed in the installation cavity 21, the plug spring is installed in the corresponding plug spring installation groove group, and then the positioning groove of the plug spring installation groove group is aligned with the groove with the positioning convex rib 2321 of the bracket body 232 and the convex rib of the inner wall of the installation cavity 21, and the plug spring installation groove group is pushed into the installation cavity from bottom to top until the snap is snapped into the mounting opening.

[0047] Through the above structure, the plug spring installation slot group is arranged on both sides of the plug spring fixing frame. During installation, the plug spring is installed in the corresponding plug spring installation slot group. The number of plug springs in each plug spring installation slot group is small, which can avoid the entanglement of the wires connected to the plug springs in the same plug spring installation slot group, thereby improving the installation efficiency; the plug spring installation slot group is detachably connected to the sealing pad bracket. When the plug spring fails, it is only necessary to remove the plug spring installation slot group corresponding to the failed plug spring, thereby improving the maintenance efficiency and reducing the maintenance cost.

[0048] Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A coupler assembly, comprising an upper coupler and a lower coupler that match each other, wherein the upper coupler comprises an upper coupler housing, the bottom of the upper coupler housing is recessed upward to form a receiving cavity, and a plurality of pins extending vertically are arranged on the top wall of the receiving cavity, characterized in that: A first row of pin groups and a second row of pin groups are arranged in the accommodating cavity, the pins of the first row of pin groups and the pins of the second row of pin groups are staggered, the number of pins in the first row of pin groups is greater than the number of pins in the second row of pin groups, and the contours of the first row of pin groups and the second row of pin groups form a trapezoidal structure, a first wire group connected to the pins of the first row of pin groups and a second wire group connected to the pins of the second row of pin groups are arranged in the upper coupler shell, the first wire group and the second wire group both extend from the outer wall of the upper coupler shell on one side of the first row of pin groups.

2. The coupler assembly according to claim 1, characterized in that: The first wire group and the second wire group are located in the same horizontal plane, and the wires of the second wire group pass through the gaps between the pins of the first pin group respectively.

3. The coupler assembly according to claim 1, characterized in that: The connection ends of the pins of the first row of pin groups are at different heights from the connection ends of the pins of the second row of pin groups, so that the first wire group and the second wire group are located in different planes.

4. The coupler assembly according to claim 1, characterized in that: The inner wall of the accommodating cavity is formed with a trapezoidal structure corresponding to the contours of the first row of pin groups and the second row of pin groups. The short side and the side of the trapezoid are connected by an arc. The distance from the short side to the long side of the trapezoid is L1, the length of the long side is L2, the radius of the arc is R, and 1 / 3L2≤R≤L1.

5. The coupler assembly according to claim 1, characterized in that: The top of the upper coupler housing is located on one side of the first row of pin groups and extends outward to form a cantilever, and the first wire group and the second wire group extend from the outer end surface of the cantilever.

6. The coupler assembly according to claim 1, characterized in that: The lower coupler comprises a lower coupler shell, the bottom of which is recessed upward to form an installation cavity, a sealing gasket is arranged in the installation cavity, a sealing gasket bracket is detachably arranged below the sealing gasket, and the sealing gasket bracket presses the sealing gasket against the inner top wall of the installation cavity.

7. The coupler assembly according to claim 6, characterized in that: The sealing pad bracket includes a bracket body and a sealing pad support plate integrally formed on the top of the bracket body. The sealing pad bracket presses the sealing pad against the inner top wall of the installation cavity through the sealing pad support plate.

8. The coupler assembly according to claim 1, characterized in that: The lower coupler comprises a plug spring fixing frame, and a first plug spring installation slot group corresponding to the first row of plug pin groups and a second plug spring installation slot group corresponding to the second row of plug pin groups are respectively arranged on both sides of the plug spring fixing frame.

9. The coupler assembly according to claim 8, characterized in that: The plug spring fixing frame also includes a sealing pad bracket located between the first plug spring installation slot group and the second plug spring installation slot group, and the first plug spring installation slot group and the second plug spring installation slot group are respectively detachably connected to the sealing pad bracket.

10. The coupler assembly according to claim 9, characterized in that: Positioning convex ribs are arranged on both sides of the sealing pad bracket, and the first spring insertion installation groove group and the second spring insertion installation groove group are provided with positioning grooves for the positioning convex ribs to be inserted.

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