Compact large-current double-layer welding plate terminal

Abstract

The utility model discloses a compact large-current double-layer soldering block terminal, which is characterized in that a first plugging unit and a second plugging unit are arranged up and down, and plugging holes for connecting cables are arranged in the first plugging unit and the second plugging unit; the same side of the first plug-in unit and the second plug-in unit is provided with threaded holes inclining towards the direction close to the plug-in holes, at least one part of the fastener is inserted into the threaded holes, and the fastener is used for driving the elastic piece to rotate by a certain angle so as to press the cable. By means of the design, the vertical space is effectively utilized, the space occupancy rate in the height direction is reduced, the terminal structure is more compact through the compact design, and efficient electrical connection can be achieved in the limited space. And secondly, the threaded hole is inclined towards the direction close to the insertion hole, so that the fastener can be conveniently inserted into the threaded hole, and the fastener can be matched with the elastic sheet to fix the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, and more specifically to a compact large-current double-layer welding plate terminal. Background Art

[0002] Terminal blocks are an accessory product used to achieve electrical connections, and are classified as connectors in the industry. With the increasing degree of industrial automation and the increasingly stringent and precise requirements for industrial control, the use of terminal blocks has gradually increased. With the development of the electronics industry, the scope of use of terminal blocks has expanded, and the types have also increased. Among them, in addition to PCB board terminals, the most widely used ones are hardware terminals, nut terminals, spring terminals, etc.

[0003] The terminal block is used to facilitate the connection of wires. It is a piece of metal sheet sealed in insulating plastic. There are holes at both ends for inserting wires and screws for tightening or loosening. For example, two wires sometimes need to be connected and sometimes need to be disconnected. At this time, the two wires can be connected by a terminal block, and they can be disconnected at any time without welding or wrapping them together. It is very convenient and fast, and suitable for interconnecting a large number of wires. In the electric power industry, there are special terminal blocks and terminal boxes, which are full of terminal blocks, single-layer, double-layer, current, voltage, ordinary, disconnectable, etc.

[0004] An existing double-layer electrical connector, such as a double-layer electrical connector with Chinese patent publication number CN208571110U, discloses that "a connecting through hole is provided in the center of the front part of the first and second terminal boards; a plurality of wiring locking screws are respectively inserted into the connecting through holes of the first and second terminal boards", that is, the locking screws are inserted into the connecting through holes along the vertical direction, and in order to increase the installation firmness of the locking screws and prevent them from loosening, it is usually necessary to increase the wall thickness in the height direction of the insulating base so as to open a threaded hole to cooperate with the locking screw. Moreover, since the locking screws are arranged vertically, the space occupancy rate of the electrical connector in the height direction is increased, which may affect the overall layout and integration of the equipment, especially in applications with limited space. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a compact high-current double-layer welding plate terminal to reduce the space occupancy rate of the double-layer welding plate terminal in the height direction, making the double-layer welding plate terminal compact, and optimizing the structure and layout of the double-layer welding plate terminal, so that it can meet the needs of high current transmission while reducing the space occupied volume.

[0006] The technical solution of the utility model is as follows: A compact high-current double-layer welding plate terminal, comprising a clamping assembly, a first plug-in unit and a second plug-in unit arranged in an upper and lower manner, wherein the first plug-in unit and the second plug-in unit are both provided with plug-in holes for connecting cables, and the same side of the first plug-in unit and the second plug-in unit are both provided with threaded holes inclined toward the plug-in hole;

[0007] The clamping assembly includes a fastener and a spring sheet. At least a portion of the fastener is inserted into the threaded hole. The fastener is used to drive the spring sheet to rotate a certain angle to compress the cable.

[0008] Furthermore, it also includes a pin, which includes a contact portion and a connecting portion, the contact portion and the connecting portion are an integral structure, and the contact portion is located directly below the spring sheet, and a protrusion is provided on the contact portion, and the protrusion is located on one end of the contact portion close to the plug hole.

[0009] Furthermore, the first plug-in unit includes a first insulating base and a first cover body, first extension parts are arranged on both sides of the first cover body, and a first notch which cooperates and engages with the first extension part is arranged at the upper end of the first insulating base.

[0010] Furthermore, the second plug-in unit includes a second insulating base and a second cover body, second extension parts are arranged on both sides of the second cover body, and a second notch which cooperates and engages with the second extension part is arranged on the upper end of the second insulating base.

[0011] Furthermore, it also includes a shell, a support platform is arranged inside the shell, the first plug-in unit is overlapped on the support platform, the second plug-in unit is located below the support platform, and a first bayonet is arranged on the support platform, a first latching protrusion is arranged on the second insulating base, the first latching protrusion and the first bayonet are engaged with each other, and when the first latching protrusion is engaged into the first bayonet, the horizontal height of the upper end surface of the first latching protrusion is lower than or equal to the horizontal height of the upper end surface of the support platform.

[0012] Furthermore, the width of the first protrusion is smaller than the width of the second insulating base.

[0013] Furthermore, a second latching protrusion is provided on the first insulating base, an avoidance opening is provided at the upper end of the shell, and at least a portion of the top surface of the shell extends downward and protrudes to form a limiting portion, the side wall of the second latching protrusion abuts against the side wall of the limiting portion, and the top surface of the second latching protrusion abuts against the inner top surface of the shell.

[0014] Furthermore, the side wall of the first insulating base is provided with a first protrusion extending outward, the side wall of the shell is provided with a first clamping hole penetrating through the thickness of the shell wall, and at least a part of the first protrusion is accommodated in the first clamping hole.

[0015] Furthermore, the side wall of the second insulating base is provided with a second protrusion extending outward, the side wall of the shell is provided with a second clamping hole penetrating through the thickness of the shell wall, and at least a part of the second protrusion is accommodated in the second clamping hole.

[0016] The utility model according to the above scheme has the following beneficial effects:

[0017] (1) The utility model provides a compact high-current double-layer welding plate terminal, in which a first plug-in unit and a second plug-in unit are arranged up and down, and the first plug-in unit and the second plug-in unit are both provided with plug-in holes for connecting cables, and the same side of the first plug-in unit and the second plug-in unit are both provided with threaded holes inclined toward the plug-in hole, and at least a part of the fastener is inserted into the threaded hole, and the fastener is used to drive the spring to rotate a certain angle to compress the cable. This design effectively utilizes the vertical space and reduces the space occupancy rate in the height direction. This compact design makes the terminal structure more compact, which is conducive to achieving efficient electrical connection in a limited space. Secondly, the threaded hole is inclined toward the plug-in hole. This design makes it easy for the fastener to be inserted into the threaded hole, so that the fastener can cooperate with the spring to fix the cable.

[0018] (2) The utility model provides a compact high-current double-layer welding plate terminal, each plug-in unit is provided with a plug-in hole for connecting a cable to allow a large current to pass through, thereby meeting the needs of high-power applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A cross-sectional view of a compact high-current double-layer welding plate terminal in an embodiment of the utility model;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of a compact high-current double-layer welding plate terminal in an embodiment of the utility model;

[0022] Figure 3This is a schematic diagram of the assembly of the first plug-in unit and the second plug-in unit in an embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the housing in the embodiment of the utility model;

[0024] Figure 5 This is a structural schematic diagram of the first plug-in unit in an embodiment of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure decomposition of the first plug-in unit in an embodiment of the utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the second plug-in unit in an embodiment of the utility model;

[0027] Figure 8 It is a schematic diagram of the structural decomposition of the second plug-in unit in the embodiment of the utility model.

[0028] In the figure, 1, snap-fit ​​assembly; 11, fastener; 12, spring piece; 2, first plug-in unit; 21, first insulating base; 211, first notch; 212, second snap-fit; 213, first protrusion; 22, first cover; 221, first extension; 3, second plug-in unit; 31, second insulating base; 311, second notch; 312, first snap-fit; 313, second protrusion; 32, second cover; 321, second extension; 4, plug-in hole; 5, threaded hole; 6, pin; 61, contact portion; 611, raised portion; 62, connecting portion; 7, shell; 71, support platform; 711, first snap-fit; 72, avoidance port; 73, limit portion; 74, first snap-fit ​​hole; 75, second snap-fit ​​hole. DETAILED DESCRIPTION

[0029] The following detailed description and drawings of the embodiments of the present invention are used to illustrate the principle of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the embodiments described.

[0030] In order to better understand the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0031] See also Figure 1 to Figure 4As shown, a compact high-current double-layer welding plate terminal provided by an embodiment of the utility model comprises a clamping assembly 1, four first plug-in units 2 and second plug-in units 3 respectively arranged one by one and arranged up and down, each first plug-in unit 2 and each second plug-in unit 3 are provided with a clamping assembly 1, and the first plug-in unit 2 and the second plug-in unit 3 are both provided with a plug-in hole 4 for connecting a cable, and the same side of the first plug-in unit 2 and the second plug-in unit 3 are both provided with a threaded hole 5 inclined toward the plug-in hole 4;

[0032] Specifically, see Figure 1 As shown, the clamping assembly 1 includes a fastener 11 and a spring 12. The spring 12 is movably mounted on a fixing column. The fixing column and the spring 12 are located on one side of the threaded hole 5. At least a portion of the fastener 11 is inserted into the threaded hole 5. When the fastener 11 is screwed in to a certain depth, the fastener 11 and the spring 12 are in contact. If the fastener 11 is screwed in further, the fastener 11 will drive the spring 12 to rotate around the fixing column at a certain angle, so that the end of the spring 12 is pressed against the cable or inserted into the hole reserved for the cable to fix the cable. This design reduces the space occupancy rate of the fastener 11 in the height direction, and effectively utilizes the vertical space, reducing the space occupancy rate in the height direction. This compact design makes the terminal structure more compact, which is conducive to achieving efficient electrical connection in a limited space.

[0033] See also Figure 6 and Figure 8 As shown, in this embodiment, a compact high-current double-layer welding plate terminal provided by the embodiment of the utility model also includes a pin 6 for ensuring smooth transmission of current in the double-layer welding plate terminal. Specifically, the pin 6 is a conductive sheet, and the pin 6 includes a contact portion 61 and a connecting portion 62. Specifically, the pin 6 adopts an integrated structure, that is, the contact portion 61 and the connecting portion 62 are made by an integrated molding process, which enhances the structural strength and stability of the pin 6 and avoids the problem of decreased conductivity due to loose or broken connections. The contact portion 61 is located directly below the spring 12. A protrusion 611 is provided on the contact portion 61, and the protrusion 611 is located on one end of the contact portion 61 close to the plug-in hole 4. When the cable is pressed by the spring sheet 12, the conductor part of the cable will directly contact the contact portion 61 of the pin 6, ensuring good contact between the cable and the pin 6 and improving the conductive efficiency. Moreover, when the cable is inserted into the plug-in hole 4 and pressed by the spring sheet 12, the protrusion 611 will clamp the outer skin of the cable, increase the friction between the cable and the plug-in hole 4, and prevent the cable from accidentally falling off, thereby preventing the risk of the cable falling off from the plug-in hole 4 when subjected to external force.

[0034] See also Figure 5-6As shown, the first plug-in unit 2 includes a first insulating base 21 and a first cover 22. Both sides of the first cover 22 are provided with a first extension 221. The upper end of the first insulating base 21 is provided with a first notch 211 that is engaged with the first extension 221. When the first insulating base 21 and the first cover 22 are assembled to form an integral part, the first extension 221 is engaged with the first notch 211, so that the first cover 22 can be limited to prevent the first cover 22 from shifting in the horizontal direction. Specifically, in this embodiment, the first insulating base 21 is the basic component of the plug-in unit. The first insulating base 21 plays a role of electrical isolation to ensure that the current will not be short-circuited when it is transmitted inside the terminal. At the same time, the first insulating base 21 also plays a role in supporting and fixing the pin 6.

[0035] See also Figure 7-Figure 8 As shown, the second plug-in unit 3 includes a second insulating base 31 and a second cover 32, and second extensions 321 are provided on both sides of the second cover 32. The upper end of the second insulating base 31 is provided with a second notch 311 that is matched and engaged with the second extension 321. Specifically, the second notch 311 is matched and engaged with the second extension 321 on the second cover 32, so that the second cover 32 can be fixed through the interaction between the second extension 321 and the second notch 311, thereby ensuring the structural firmness of the second plug-in unit 3 and preventing the risk of displacement of the second cover 32 due to factors such as vibration and impact during use.

[0036] See also Figure 4 As shown, a compact high-current double-layer welding plate terminal provided by an embodiment of the utility model also includes a shell 7, a support platform 71 is arranged in the shell 7, the first plug-in unit 2 is overlapped on the support platform 71, the second plug-in unit 3 is located below the support platform 71, and a first bayonet 711 is arranged on the support platform 71, and a first clamping protrusion 312 is arranged on the second insulating base 31, the first clamping protrusion 312 and the first bayonet 711 are matched and clamped, when the first clamping protrusion 312 is clamped into the first bayonet 711, the horizontal height of the upper end surface of the first clamping protrusion 312 is lower than or equal to the horizontal height of the upper end surface of the support platform 71, preferably, the width of the first clamping protrusion 312 is smaller than the width of the second insulating base 31, and the side wall of the second insulating base 31 is provided with a second protrusion 313 extending outward, and the side wall of the shell 7 is provided with a second clamping hole 75 that penetrates the wall thickness of the shell 7, and at least a part of the second protrusion 313 is accommodated in the second clamping hole 75.

[0037] Specifically, when the first clamping protrusion 312 is clamped into the first clamping hole 711, the horizontal height of the upper end surface of the first clamping protrusion 312 is lower than or equal to the horizontal height of the upper end surface of the support platform 71. This design ensures that when the second plug-in unit 3 is fixed on the support platform 71, its overall height will not exceed the upper end surface of the support platform 71, which not only facilitates the insertion of the cable into the plug-in hole 4 of the first plug-in unit 2, but also helps to maintain the compactness and structural stability of the entire high-current double-layer welding plate terminal.

[0038] Preferably, the first insulating base 21 is provided with a second clamping protrusion 212, the upper end of the shell 7 is provided with an avoidance opening 72, and at least a portion of the top surface of the shell 7 extends downward to form a limiting portion 73, the side wall of the second clamping protrusion 212 abuts against the side wall of the limiting portion 73, and the top surface of the second clamping protrusion 212 abuts against the inner top surface of the shell 7. Specifically, the side wall of the first insulating base 21 is provided with a first protrusion 213 extending outward, and the side wall of the shell 7 is provided with a first clamping hole 74 penetrating the wall thickness of the shell 7, and at least a portion of the first protrusion 213 is accommodated in the first clamping hole 74.

[0039] The indicated orientation or position relationship is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when used, or the orientation or position relationship commonly understood by technical personnel in this field, or the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0040] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

[0041] The above is an exemplary description of the utility model patent in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model patent is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the utility model patent, or the concept and technical solution of the utility model patent are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A compact high-current double-layer welding plate terminal, characterized in that: include: A card connection assembly (1), a first plug-in unit (2) and a second plug-in unit (3) arranged in an upper and lower manner, wherein the first plug-in unit (2) and the second plug-in unit (3) are both provided with a plug-in hole (4) for connecting a cable, and the first plug-in unit (2) and the second plug-in unit (3) are both provided with a threaded hole (5) inclined in a direction close to the plug-in hole (4) on the same side; The clamping assembly (1) comprises a fastener (11) and a spring sheet (12); at least a portion of the fastener (11) is inserted into the threaded hole (5); and the fastener (11) is used to drive the spring sheet (12) to rotate at a certain angle to tighten the cable.

2. A compact high-current double-layer welding plate terminal as claimed in claim 1, characterized in that: The invention also comprises a pin (6), wherein the pin (6) comprises a contact portion (61) and a connecting portion (62), wherein the contact portion (61) and the connecting portion (62) are an integral structure, and the contact portion (61) is located directly below the spring sheet (12), and a protrusion (611) is provided on the contact portion (61), and the protrusion (611) is located on one end of the contact portion (61) close to the plug hole (4).

3. A compact high-current double-layer welding plate terminal as claimed in claim 1, characterized in that: The first plug-in unit (2) comprises a first insulating base (21) and a first cover (22); first extension portions (221) are provided on both sides of the first cover (22); and a first notch (211) is provided at the upper end of the first insulating base (21) for engaging with the first extension portion (221).

4. A compact high-current double-layer welding plate terminal as claimed in claim 3, characterized in that: The second plug-in unit (3) comprises a second insulating base (31) and a second cover (32); second extension portions (321) are provided on both sides of the second cover (32); and a second notch (311) is provided at the upper end of the second insulating base (31) for engaging with the second extension portion (321).

5. A compact high-current double-layer welding plate terminal as claimed in claim 4, characterized in that: The invention also comprises a shell (7), wherein a support platform (71) is arranged inside the shell (7), the first plug-in unit (2) is overlapped on the support platform (71), the second plug-in unit (3) is located below the support platform (71), and a first snap-in slot (711) is arranged on the support platform (71), and a first snap-in protrusion (312) is arranged on the second insulating base (31), the first snap-in protrusion (312) and the first snap-in slot (711) are matched and snap-fitted, and when the first snap-in protrusion (312) is snap-fitted into the first snap-in slot (711), the horizontal height of the upper end surface of the first snap-in protrusion (312) is lower than or equal to the horizontal height of the upper end surface of the support platform (71).

6. A compact high-current double-layer welding plate terminal as claimed in claim 5, characterized in that: The width of the first latching protrusion (312) is smaller than the width of the second insulating base (31).

7. A compact high-current double-layer welding plate terminal as claimed in claim 5, characterized in that: A second latching protrusion (212) is provided on the first insulating base (21), a relief opening (72) is provided at the upper end of the shell (7), and at least a portion of the top surface of the shell (7) extends downward to form a limiting portion (73), the side wall of the second latching protrusion (212) abuts against the side wall of the limiting portion (73), and the top surface of the second latching protrusion (212) abuts against the inner top surface of the shell (7).

8. A compact high-current double-layer welding plate terminal as claimed in claim 5, characterized in that: The side wall of the first insulating base (21) is provided with a first protrusion (213) extending outward, and the side wall of the shell (7) is provided with a first clamping hole (74) penetrating the wall thickness of the shell (7), and at least a part of the first protrusion (213) is accommodated in the first clamping hole (74).

9. A compact high-current double-layer welding plate terminal as claimed in claim 5, characterized in that: The side wall of the second insulating base (31) is provided with a second protrusion (313) extending outward, and the side wall of the shell (7) is provided with a second clamping hole (75) penetrating the wall thickness of the shell (7), and at least a part of the second protrusion (313) is accommodated in the second clamping hole (75).

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