PLC expansion module capable of being combined and assembled

Abstract

The utility model discloses a PLC expansion module capable of being combined and assembled, and the technical scheme solves the problems that the weight and pulling of a tapping terminal are increased due to the fact that the number of wires connected to the tapping terminal is large, the connection between the tapping terminal and a wiring terminal on a PLC is not stable enough, and the operation is inconvenient. The PLC extension module comprises a PLC extension module body, a plurality of wiring grooves are formed in the PLC extension module body, the wiring ends are arranged in the wiring grooves, first screw holes are formed in the front walls of the wiring ends, and second screw holes are formed in the rear walls of the wiring ends. Through the mutual cooperation of the insulating shell, the branching terminal, the inclined copper sheet, the mounting plates, the springs, the L-shaped rods, the triangular blocks and the like, the left and right positions of the branching terminal can be limited by the two mounting plates, the insulating shell is prevented from sliding downwards by the two L-shaped rods, in addition, a plurality of wire terminals can be inserted into the rectangular opening and are connected with the inclined copper sheet, and the wire terminals are prevented from sliding downwards. And the problem that the branching terminal is easy to shake can be effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of automation control technology, specifically relating to a PLC expansion module that can be assembled and combined. Background Technology

[0002] PLC expansion modules are devices used to expand the functions and I / O (input / output) channels of a PLC system. Through these expansion modules, the PLC system can add more input / output points, increase communication capabilities, or implement other functions according to actual needs.

[0003] On PLC terminals, typically only one wire can be connected to each terminal to ensure reliable and safe connections. If multiple wires need to be connected, a special tapping terminal provided by the manufacturer must be used. Multiple wires can be connected to the tapping terminal, but this tapping terminal also needs to be connected to the PLC terminals. Because the tapping terminal has more wires connected, it increases the weight and strain on the tapping terminal, making the connection between the tapping terminal and the PLC terminals less stable. This can easily lead to the tapping terminal shaking or loosening and falling off, making it less safe to use.

[0004] Therefore, a modular PLC expansion module is designed to overcome the aforementioned technical shortcomings. Summary of the Invention

[0005] (1) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a modular PLC expansion module. This technical solution solves the problem that, because the tap terminals have many wires connected to them, the weight and pulling of the tap terminals are increased, making the connection between the tap terminals and the wiring terminals on the PLC unstable and prone to tap terminals shaking or loosening and falling off.

[0007] (2) Technical solution

[0008] To address the aforementioned technical problems, this utility model provides a modular PLC expansion module, comprising a PLC expansion module body, a plurality of wiring slots on the PLC expansion module body, wiring terminals within the wiring slots, a first threaded hole on the front wall of each wiring terminal, a plurality of insulating shells on the front wall of the PLC expansion module body, the bottom of each insulating shell being open, a branch terminal within each insulating shell, the bottom end of each branch terminal extending into the wiring slot, the branch terminal being Z-shaped, an arc-shaped opening at the bottom end of each branch terminal, the rear sidewall of each branch terminal contacting the wiring terminal, a first screw installed between the front wall of each branch terminal and the first threaded hole, a branching mechanism on the front wall of each branch terminal, and a positioning mechanism between the top of the insulating shell and the front wall of the PLC expansion module body.

[0009] Preferably, the branching mechanism includes a plurality of inclined copper sheets, which are inclined downwards. The front wall of the inclined copper sheet has a second threaded hole, in which a second screw is installed. The front wall of the insulating shell has a rectangular opening that matches the inclined copper sheet.

[0010] Preferably, the positioning mechanism includes a U-shaped plate, which is fixed to the top of the insulating shell. L-shaped rods are symmetrically fixedly connected to the front wall of the U-shaped plate. Springs are fixedly connected to the opposite side of the two L-shaped rods near the bottom. A triangular block is provided between the two L-shaped rods. The rear end of the triangular block is fixedly connected to the front wall of the PLC expansion module body. A stop block is symmetrically fixedly connected to the front wall of the U-shaped plate near the top. The stop block is in contact with the inner wall of the L-shaped rod.

[0011] Furthermore, mounting grooves are respectively provided on the left and right side walls of the insulating shell near the front side, and mounting plates are respectively provided on the left and right sides of the insulating shell. The mounting plates are L-shaped and one side of the mounting plate extends into the mounting groove.

[0012] Furthermore, a plurality of limiting plates are fixedly connected to the front wall of the insulating shell, the limiting plates are inclined downwards, and the front wall of the limiting plates is fixedly connected to a retaining spring.

[0013] Furthermore, positioning holes are respectively opened at the four corners of the front wall of the branch terminal, and positioning rods are installed in the positioning holes. The rear end of the positioning rods is fixedly connected to the insulating shell.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention, through the cooperation of an insulating shell, branch terminals, inclined copper sheets, mounting plates, springs, L-shaped rods, and triangular blocks, enables two mounting plates to restrict the left and right positions of the branch terminals, and two L-shaped rods to prevent the insulating shell from sliding down. In addition, multiple wire terminals can be inserted into the rectangular opening and connected to the inclined copper sheets, which effectively solves the problem of branch terminals easily shaking. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This utility model Figure 1 A schematic diagram of the right visual structure;

[0019] Figure 3 This is a schematic diagram of the overall structure of the insulating shell of this utility model from the right side.

[0020] Figure 4 This is a schematic diagram of the overall structure of the insulating shell of this utility model from the left view.

[0021] Figure 5 This is a right view of the internal structure of the insulating shell of this utility model;

[0022] Figure 6 This is a left view of the internal structure of the insulating shell of this utility model;

[0023] Figure 7 This is a schematic diagram showing the positional distribution of the inclined copper sheet and the second wire hole in this utility model;

[0024] Figure 8 This utility model Figure 5 Enlarged view of point A in the image.

[0025] The labels in the attached diagram are as follows: 1. PLC expansion module body; 2. Wiring slot; 3. Wiring terminal; 4. First threaded hole; 5. First screw; 6. Insulating shell; 7. Branch terminal; 8. Arc-shaped opening; 9. Inclined copper sheet; 10. Second threaded hole; 11. Second screw; 12. Rectangular opening; 13. Limiting plate; 14. Snap ring; 15. Positioning hole; 16. Positioning rod; 17. U-shaped plate; 18. L-shaped rod; 19. Spring; 20. Triangular block; 21. Stop block; 22. Mounting slot; 23. Mounting plate. Detailed Implementation

[0026] This specific embodiment is a modular PLC expansion module, and its structural diagram is shown below. Figures 1-8As shown, the system includes a PLC expansion module body 1, which has several wiring slots 2. Wiring terminals 3 are located within the wiring slots 2. A first threaded hole 4 is formed on the front wall of each wiring terminal 3. Several insulating shells 6 are located on the front wall of the PLC expansion module body 1. The bottom of each insulating shell 6 is not enclosed. A branch terminal 7 is located inside each insulating shell 6. The bottom of each branch terminal 7 extends into the wiring slots 2. The branch terminal 7 is Z-shaped and has an arc-shaped opening 8 at its bottom. The rear side wall of the branch terminal 7 contacts the wiring terminal 3. A first screw 5 is installed between the front wall of the branch terminal 7 and the first threaded hole 4. A branching mechanism is provided on the front wall of the branch terminal 7. A positioning mechanism is provided between the top of the insulating shell 6 and the front wall of the PLC expansion module body 1.

[0027] The PLC expansion module body 1 in this technical solution is a common PLC expansion module for automation control on the market. It is a relatively mature technology, and its working principle is common knowledge in this field, so it will not be described in detail in this technical solution.

[0028] like Figures 3-7 As shown, the wire separating mechanism includes an inclined copper sheet 9, and several inclined copper sheets 9 are provided. The inclined copper sheets 9 are inclined downward. A second wire hole 10 is opened on the front wall of the inclined copper sheet 9. A second screw 11 is installed in the second wire hole 10. A rectangular opening 12 matching the inclined copper sheet 9 is opened on the front wall of the insulating shell 6.

[0029] The downward-sloping copper plate 9 prevents the wires from bending at 90 degrees after the wire terminals are connected, thus effectively protecting the external wires.

[0030] like Figure 8 As shown, the positioning mechanism includes a U-shaped plate 17, which is fixed to the top of the insulating shell 6. L-shaped rods 18 are symmetrically fixedly connected to the front wall of the U-shaped plate 17. Springs 19 are fixedly connected to the opposite side of the two L-shaped rods 18 near the bottom. A triangular block 20 is provided between the two L-shaped rods 18. The rear end of the triangular block 20 is fixedly connected to the front wall of the PLC expansion module body 1. A stop block 21 is symmetrically fixedly connected to the front wall of the U-shaped plate 17 near the top. The stop block 21 is in contact with the inner wall of the L-shaped rod 18.

[0031] The positioning mechanism can fix the insulating shell 6 to the PLC expansion module body 1, so that the insulating shell 6 will not fall off when there are too many connected wires, thus playing a role in stabilizing the connection. The tops of the two L-shaped rods 18 are respectively inclined, so that the triangular block 20 can more easily open the two L-shaped rods 18.

[0032] The insulating shell 6 has mounting grooves 22 on its left and right side walls near the front, and mounting plates 23 are provided on its left and right sides. The mounting plates 23 are L-shaped and extend into the mounting grooves 22 on one side. The two mounting plates 23 can limit the insulating shell 6 for the second time, so that the insulating shell 6 will not shake during use and avoid the phenomenon of twisting at the wire connection, which would cause the wire terminal to loosen between the inclined copper plate 9.

[0033] In addition, several limiting plates 13 are fixedly connected to the front wall of the insulating shell 6. The limiting plates 13 are inclined downwards, and a retaining spring 14 is fixedly connected to the front wall of the limiting plates 13. The limiting plates 13 and the inclined copper sheet 9 are inclined at the same angle. This can support the wire terminal, so that the wire terminal is inclined after being connected to the inclined copper sheet 9. This can prevent the wire from bending and protect the connection between the wire terminal and the wire. Furthermore, the retaining spring 14 can further limit the wire and prevent the wire from loosening due to shaking and the inclined copper sheet 9, thus improving the safety of use.

[0034] The branch terminal 7 has positioning holes 15 near the four corners of its front wall. A positioning rod 16 is installed in the positioning hole 15. The rear end of the positioning rod 16 is fixedly connected to the insulating shell 6. The positioning rod 16 can stably fix the branch terminal 7 in the insulating shell 6 and prevent the branch terminal 7 from shaking in the insulating shell 6.

[0035] Working Principle: When using this technical solution, if multiple wires need to be connected to the same wiring hole, first place the insulating shell 6 between the two mounting plates 23 and push the insulating shell 6 upward. The two mounting plates 23 will then insert into the mounting groove 22. When the insulating shell 6 rises to its limit position, the two L-shaped rods 18 will touch the triangular block 20, and the triangular block 20 will compress the L-shaped rods 18, causing them to swing outward and compress the spring 19. When the insulating shell 6 rises to its limit position, the triangular block 20 will reach inside the two L-shaped rods 18, and simultaneously, the rebound force of the spring 19 will push the two L-shaped rods 18 to swing inward. This fixes the position of the insulating shell 6, preventing it from sliding downward. At this time, the arc-shaped opening 8 on the branch terminal 7 corresponds to the first threaded hole 4. Then, the first screw 5 is installed on the first threaded hole 4 and tightened, achieving the connection between the branch terminal 7 and the wiring terminal 3. Next, loosen the second screw 11, insert the external wire terminal into the rectangular opening 12 and hold the second screw 11, then tighten the second screw 11 to press the external wire terminal, thus connecting the external wire terminal to the inclined copper plate 9. When multiple wires need to be connected, continue to loosen the second screw 11 and install accordingly. Then, lock the external wire in the retaining spring 14. This reduces the shaking of the external wire terminal and improves the stability of the connection between the external wire terminal and the inclined copper plate 9, effectively achieving a stable connection of multiple wires. When it is necessary to disassemble the branch terminal 7, first remove the first screw 5 and press the two L-shaped rods 18 to compress the spring 19, causing the L-shaped rods 18 to swing outward. Then, pull down the insulating shell 6 to disengage the triangular block 20 from the L-shaped rods 18, thus disassembling the branch terminal 7 and effectively improving the ease of use.

[0036] All technical features in this embodiment can be freely combined according to actual needs.

[0037] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A modular PLC expansion module, comprising a PLC expansion module body (1), characterized in that: The PLC expansion module body (1) is provided with several wiring slots (2), and wiring terminals (3) are provided in the wiring slots (2). The front wall of the wiring terminal (3) is provided with a first thread hole (4). The front wall of the PLC expansion module body (1) is provided with several insulating shells (6). The bottom of the insulating shell (6) is not closed. The insulating shell (6) is provided with a branch terminal (7). The bottom end of the branch terminal (7) extends into the wiring slot (2). The branch terminal (7) is Z-shaped. The bottom end of the branch terminal (7) is provided with an arc-shaped opening (8). The rear side wall of the branch terminal (7) is in contact with the wiring terminal (3). A first screw (5) is installed between the front wall of the branch terminal (7) and the first thread hole (4). The front wall of the branch terminal (7) is provided with a branching mechanism. The top of the insulating shell (6) is provided with a positioning mechanism between the top of the insulating shell (6) and the front wall of the PLC expansion module body (1).

2. The PLC expansion module that can be assembled according to claim 1, characterized in that: The dividing mechanism includes an inclined copper sheet (9), and there are several inclined copper sheets (9). The inclined copper sheets (9) are inclined downward. The front wall of the inclined copper sheet (9) is provided with a second wire hole (10). A second screw (11) is installed in the second wire hole (10). The front wall of the insulating shell (6) is provided with a rectangular opening (12) that matches the inclined copper sheet (9).

3. The PLC expansion module that can be assembled according to claim 1, characterized in that: The positioning mechanism includes a U-shaped plate (17), which is fixed to the top of the insulating shell (6). The front wall of the U-shaped plate (17) is symmetrically fixedly connected with L-shaped rods (18). A spring (19) is fixedly connected to the opposite side of the two L-shaped rods (18) near the bottom. A triangular block (20) is provided between the two L-shaped rods (18). The rear end of the triangular block (20) is fixedly connected to the front wall of the PLC expansion module body (1). A stop block (21) is symmetrically fixedly connected to the front wall of the U-shaped plate (17) near the top. The stop block (21) is in contact with the inner wall of the L-shaped rod (18).

4. The PLC expansion module that can be assembled according to claim 1, characterized in that: The insulating shell (6) has mounting grooves (22) on its left and right side walls near the front side. The insulating shell (6) has mounting plates (23) on its left and right sides. The mounting plates (23) are L-shaped and extend into the mounting grooves (22) on one side.

5. A modular PLC expansion module according to claim 2, characterized in that: The front wall of the insulating shell (6) is fixedly connected with several limiting plates (13), the limiting plates (13) are inclined downwards, and the front wall of the limiting plates (13) is fixedly connected with snap rings (14).

6. The PLC expansion module that can be assembled according to claim 2, characterized in that: The front wall of the branch terminal (7) is provided with positioning holes (15) near the four corners. A positioning rod (16) is provided in the positioning hole (15). The rear end of the positioning rod (16) is fixedly connected to the insulating shell (6).

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