PLC cabinet body safety type terminal combined test tool, safety type test plug and safety type PLC test cabinet

Abstract

The utility model discloses a PLC cabinet body safety type terminal combined test tool, a safety type test plug and a safety type PLC test cabinet, and relates to the technical field of PLC test. In order to solve the technical problems in the prior art that the test cost is increased, the test period is prolonged and even the overall progress of a project is affected due to the fact that the existing PLC test work mainly depends on manual operation, the efficiency is low and the error rate is high, the utility model provides a technical scheme that the utility model provides a combined test tool for a PLC cabinet insurance type terminal. The test tool comprises a fuse terminal set, the fuse terminal set comprises a first sub-terminal and a second sub-terminal, each of the first sub-terminal and the second sub-terminal comprises a base and a contact, the base is of a cuboid structure, a through hole is formed in the side wall, with the smallest surface area, of the cuboid structure, the contact is of a cylinder structure, and the through hole is communicated with the through hole. The telescopic rod is telescopically arranged in the through hole; the first sub-terminal and the second sub-terminal are arranged in parallel and in a staggered manner. The number of the fuse terminal groups is at least two, and the fuse terminal groups are detachably connected to the terminal support. The method is suitable for being applied to PLC testing work.

Description

Technical Field

[0001] The invention relates to the technical field of PLC testing, and in particular to a PLC cabinet fuse-type terminal combination testing tool. Background Art

[0002] In modern industrial automation systems, PLCs (Programmable Logic Controllers) are widely used in various automated control and monitoring tasks. They are core components that ensure system stability and efficiency. Therefore, PLC testing is crucial to the proper operation of the entire industrial automation system. The accuracy and efficiency of testing directly impact system reliability, safety, and operating costs. However, existing PLC testing processes still suffer from numerous limitations and technical challenges, necessitating urgent improvement.

[0003] Currently, PLC testing relies primarily on manual labor, a complex and error-prone process. First, technicians must manually configure the test program based on the specific configuration of the PLC cabinet being tested. This process often requires a deep understanding of the specifications, functions, and interfaces of each PLC module to ensure that the test program covers all possible operating scenarios. However, due to the wide variety and complex configurations of PLC modules, setting up the test program is not only time-consuming but also prone to oversights, resulting in incomplete coverage or incorrect configurations.

[0004] After the test program is set up, testers must manually connect it to each PLC module according to the program's requirements. This process is extremely challenging, as its complexity results in a low error tolerance. A single mistake can lead to incorrect or missed connections, compromising the accuracy of test results. This manual connection process is particularly time-consuming in practice and typically requires the collaborative work of at least two technicians, increasing labor costs and operation time. Furthermore, due to the high level of manual operation involved in the test, any irregular operation could cause system failures, further reducing test reliability.

[0005] Furthermore, as industrial automation systems continue to grow in scale and complexity, traditional manual PLC testing methods are no longer able to meet this growing demand. During large-scale PLC system testing, problems such as low efficiency and high error rates in manual operations become increasingly prominent, leading to increased testing costs, longer testing cycles, and even impacting the overall project schedule.

[0006] In summary, these defects of the prior art have seriously affected the efficiency and reliability of PLC testing, especially in the industrial scenarios with increasing automation, these problems are particularly prominent. Therefore, there is an urgent need for a solution that can simplify the PLC testing process, improve testing accuracy and efficiency, reduce the dependence on manual operation, reduce the risk of errors, and save manpower and time costs, thereby improving the overall testing performance and ensuring the stability and efficiency of industrial automation systems. Utility model content

[0007] To solve the technical problems in the prior art that the existing PLC testing work mainly relies on manual operation, which leads to low efficiency, high error rate, increased testing cost, prolonged testing period, and even affects the overall progress of the project, the technical solution provided by the utility model is:

[0008] A PLC cabinet body safety terminal combined type testing tool, the testing tool comprises:

[0009] A safety terminal group,

[0010] The safety terminal group comprises a sub-terminal one and a sub-terminal two, and both the sub-terminal one and the sub-terminal two comprise a base and a contact,

[0011] The base is a cuboid structure, and a through hole is arranged on a side wall with the smallest surface area of the cuboid structure,

[0012] The contact is a cylindrical structure and is telescopically arranged in the through hole;

[0013] The sub-terminal one and the sub-terminal two are arranged in parallel and staggered;

[0014] The safety terminal group has at least two and is detachably connected to

[0015] A terminal support.

[0016] Further, a preferred embodiment is provided, the surface of the terminal support has a groove, one of the sub-terminals in the safety terminal group is arranged in the groove, and the sub-terminal one and the sub-terminal two are arranged in parallel and staggered.

[0017] Further, a preferred embodiment is provided, the side wall of the terminal support is provided with a hole, the side wall of the sub-terminal one and the sub-terminal two is provided with a protrusion, and the sub-terminal one and the sub-terminal two are connected to the terminal support through interference fit of the hole and the protrusion.

[0018] Further, a preferred embodiment is provided, one edge of the cuboid structure, which is close to the contact and away from the terminal support, is provided with a chamfer.

[0019] Furthermore, a preferred embodiment is provided, wherein the contact is connected to the base via a spring.

[0020] Furthermore, a preferred embodiment is provided in which the axis of the spring coincides with the axis of the contact.

[0021] Furthermore, a preferred embodiment is provided, which also includes a back clip, which is a rectangular structure and is detachably fixed to a side wall of the terminal bracket away from the fuse terminal group. A protrusion is provided at one end of the back clip close to the fuse terminal group, and the protrusion faces the terminal bracket.

[0022] Furthermore, a preferred embodiment is provided, wherein the back clip is connected to the terminal bracket via a cover plate, and after the cover plate is detachably connected to the back clip, it is detachably connected to the terminal bracket.

[0023] Based on the same utility model concept, the utility model also provides a safety test plug, including the test tooling and an adapter, the adapter is connected to the at least two safety terminal groups respectively through a wire, and the wire passes through the end of the through hole away from the contact and is connected to the contact.

[0024] Based on the same utility model concept, the utility model also provides a safety type PLC test cabinet, which is connected to the PLC under test through the non-safety type test plug.

[0025] Compared with the prior art, the technical solution provided by the present invention is beneficial in that:

[0026] This utility model provides a PLC cabinet fuse terminal assembly test fixture. The test fixture's base and contact design provide reliable electrical connection. The contact design is a retractable cylindrical structure, allowing for flexible response to varying contact requirements during testing. This design effectively prevents contact wear and poor contact, improving test stability.

[0027] This utility model provides a PLC cabinet fuse terminal assembly test fixture. The parallel and staggered arrangement of sub-terminals 1 and 2 creates a compact terminal block design. Compared to traditional parallel terminal blocks, this staggered design effectively saves space, improves terminal layout efficiency, and adapts to a wider variety of testing environments.

[0028] This utility model provides a PLC cabinet fuse terminal assembly test fixture. The terminal bracket has a groove arrangement, achieving a more stable installation effect. The sub-terminals in the groove can reduce loosening or displacement during operation, thereby improving the overall structural firmness and enhancing the reliability of the test.

[0029] This utility model provides a PLC cabinet fuse terminal assembly test fixture. The sub-terminals and terminal brackets are connected through an interference fit between holes and protrusions, enhancing the mechanical strength of the terminal assembly. This connection ensures that the sub-terminals remain stable during repeated insertion and removal operations, effectively preventing loosening or poor contact during long-term use.

[0030] This utility model provides a PLC cabinet fuse terminal assembly test fixture with a chamfered design that effectively improves operational convenience and safety. The chamfer reduces friction when inserting or removing terminals, making operation easier and preventing damage or injury caused by sharp corners, thereby enhancing product safety.

[0031] This utility model provides a PLC cabinet fuse terminal assembly test fixture. The contacts are connected to the base via springs, ensuring good reset performance during use. This structure automatically returns to its initial state after testing, improving operational efficiency and reducing the risk of misoperation caused by human intervention.

[0032] This utility model provides a PLC cabinet fuse terminal assembly test fixture. The design of the spring and contact axis coincides to ensure uniform and stable contact force, further improving the terminal's durability and contact performance. During use, the spring force will not deviate or become uneven, thereby improving the contact's response speed and accuracy.

[0033] This utility model provides a PLC cabinet fuse terminal block test fixture. The back clip design further enhances the installation flexibility and portability of the terminals. By fixing the back clip to the other side of the terminal bracket, the entire test device is more stable while maintaining detachability, facilitating quick adjustment and operation in different environments.

[0034] This utility model provides a PLC cabinet fuse terminal assembly test fixture. The back clip is connected to the terminal bracket via a cover plate, and the connection is detachable. This structural design simplifies the assembly and disassembly of the device while enhancing the integrity and robustness of the structure. When components need to be replaced, the user can easily operate, reducing maintenance costs.

[0035] This utility model provides a PLC cabinet fuse terminal assembly test fixture. The test fixture and adapter are connected by wires that pass through through-holes. This design makes wire routing more rational and reduces interference and loss in electrical connections. The wires enter the through-holes at the end away from the contacts, helping to prevent them from being bent or damaged by stress.

[0036] This utility model provides a PLC cabinet fuse terminal assembly test fixture. The fuse test plug connects to the PLC via the test fixture and adapter, providing an efficient and stable signal transmission path. During testing, the integrity and accuracy of the test signal are ensured, reducing error rates. This design offers advantages over existing PLC testing solutions.

[0037] The utility model provides a PLC cabinet fuse terminal combined test tool, which is suitable for use in PLC testing work. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a three-dimensional schematic diagram of a PLC cabinet fuse terminal combination test fixture;

[0039] Figure 2 for Figure 1 Side view of;

[0040] Figure 3 for Figure 1 A top view of

[0041] Figure 4 for Figure 1 Bottom view of

[0042] Figure 5 for Figure 1 Rear view;

[0043] Figure 6 for Figure 1 Exploded diagram;

[0044] Figure 7 It is a three-dimensional schematic diagram of the back clip and cover.

[0045] Among them, 1 represents the terminal bracket, 2 represents the sub-terminal 1, 3 represents the sub-terminal 2, 4 represents the back clip, and 5 represents the cover. DETAILED DESCRIPTION

[0046] In order to make the advantages and benefits of the technical solution provided by the present invention more clearly reflected, the technical solution provided by the present invention is now further described in detail with reference to the accompanying drawings, specifically:

[0047] Implementation 1: This implementation provides a PLC cabinet fuse terminal assembly test fixture, the test fixture comprising:

[0048] Fuse terminal block,

[0049] The fuse terminal group includes a sub-terminal 1 2 and a sub-terminal 2 3, and each of the sub-terminal 1 2 and the sub-terminal 2 3 includes a base and a contact.

[0050] The base is a rectangular parallelepiped structure, and a through hole is provided on a side wall of the rectangular parallelepiped structure with the smallest surface area.

[0051] The contact is a cylindrical structure and is telescopically arranged in the through hole;

[0052] The sub-terminal 1 2 and the sub-terminal 2 3 are arranged in parallel and staggered;

[0053] There are at least two fuse terminal groups, which are detachably connected to

[0054] On terminal bracket 1.

[0055] Among them, the second sub-terminal 3 is a safety type terminal.

[0056] Implementation method 2. This implementation method is a further limitation of a PLC cabinet fuse terminal combination test tool provided in implementation method 1. The terminal bracket 1 has a groove on its surface, and one of the sub-terminals in the fuse terminal group is arranged in the groove, so that sub-terminal 1 2 and sub-terminal 2 3 are arranged in parallel and staggered.

[0057] Implementation method three. This implementation method is a further limitation of a PLC cabinet fuse terminal combination test fixture provided in implementation method one. The terminal bracket 1 is provided with a hole on the side wall, and the sub-terminal 1 2 and sub-terminal 2 3 are provided with a protrusion on the side wall. The sub-terminal 1 2 and sub-terminal 2 3 are connected to the terminal bracket 1 through the interference fit of the hole and the protrusion.

[0058] Implementation 4: This implementation further limits the PLC cabinet fuse terminal assembly test fixture provided in Implementation 1. On the rectangular structure, an edge close to the contact and away from the terminal bracket 1 is chamfered.

[0059] Implementation method 5: This implementation method further limits the PLC cabinet fuse terminal assembly test fixture provided in implementation method 1, and the contact is connected to the base through a spring.

[0060] Implementation method 6: This implementation method further limits the PLC cabinet fuse terminal assembly test fixture provided in implementation method 5, and the axis of the spring coincides with the axis of the contact.

[0061] Implementation method seven. This implementation method is a further limitation of a PLC cabinet fuse-type terminal combination test tool provided in implementation method one, and also includes a back clip 4. The back clip 4 is a rectangular structure and is detachably fixed on a side wall of the terminal bracket 1 away from the fuse terminal group. The back clip 4 is provided with a protrusion at one end close to the fuse terminal group, and the protrusion faces the terminal bracket 1.

[0062] Implementation method eight. This implementation method is a further limitation of a PLC cabinet fuse terminal combination test tool provided in implementation method seven. The back clamp 4 is connected to the terminal bracket 1 through a cover plate 5. After the cover plate 5 is detachably connected to the back clamp 4, it can be detachably connected to the terminal bracket 1.

[0063] Embodiment 9. This embodiment provides a safety-type test plug, including the test tooling and adapter provided in embodiment 1, wherein the adapter is connected to the at least two safety terminal groups respectively through a wire, and the wire passes through the end of the through hole away from the contact and is connected to the contact.

[0064] Embodiment 10: This embodiment provides a safety-type PLC test cabinet, which is connected to the PLC under test via the non-safety-type test plug provided in embodiment 9.

[0065] Implementation Method 11: Combination Figure 1-7 This embodiment further describes the above technical solution in detail through specific examples, specifically:

[0066] The test fixture is secured to the terminal under test by the reaction force of the spring inserted into the corresponding terminal under test and the tension between the back clamp 4 and the terminal under test. The contact between the contact and the terminal under test (spring compression) establishes electrical continuity between the terminal under test and the test fixture.

[0067] 1. Design and manufacture of fuse terminal blocks

[0068] The core of the design of the fuse terminal group lies in the structure and connection of sub-terminal 1 2 and sub-terminal 2 3:

[0069] Base and Contact Design: The rectangular structure of each sub-terminal base can be made of high-strength engineering plastics such as polyamide (PA) or polycarbonate (PC) to provide excellent insulation and mechanical strength. A through hole is provided on the side wall with the smallest surface area. The hole diameter should precisely match the contact diameter to ensure that the contact will not loosen or become stuck during extension and retraction.

[0070] Contact Material Selection: As electrical contacts, it's recommended to use a metal with good conductivity, such as copper or silver-plated copper. To prevent arc erosion, an anti-oxidation coating or electroplating with a precious metal (such as nickel or silver) can be added to the surface. The retractable function of the contacts is achieved through an internal spring, which can be made of stainless steel or nickel-plated steel to ensure durability and corrosion resistance.

[0071] 2. Spring and return mechanism

[0072] In order to ensure the telescopic performance of the contact, the contact and the base are connected by a spring. The size and material selection of the spring are crucial:

[0073] Spring Specification: The design of the spring needs to be determined according to the extension distance and load of the contact. It is recommended to choose a compression spring with moderate stiffness to ensure that the contact has enough pressure when contacting and can quickly reset.

[0074] Axis Coaxial Design: To ensure stable movement of the contact, the axis of the spring and the contact is designed as a coaxial structure. The concentricity can be ensured by precise mold processing to avoid lateral deviation of the contact under stress.

[0075] 3. Design and manufacture of terminal support 1

[0076] The design of terminal support 1 should consider installation and stability:

[0077] Groove Design: To achieve the parallel and staggered arrangement of sub-terminal 2 and sub-terminal 3, the surface of terminal support 1 is provided with precise grooves. The depth and width of the grooves should match the size of the sub-terminal to ensure stable installation and easy disassembly. Terminal support 1 is recommended to use aluminum alloy or plastic injection molding process, and the material can be selected from engineering plastics with good high temperature resistance and insulation performance.

[0078] Protrusion and hole interference fit: The interference fit connects the sub-terminal and the terminal support 1 to ensure tight combination. The tolerance of interference fit should be strictly controlled by precise CNC machine or mold to ensure stable connection after assembly and withstand certain mechanical impact.

[0079] 4. Back clip 4 and fixing device design

[0080] The fixing design between back clip 4 and terminal support 1 ensures easy operation during installation and certain anti-vibration performance:

[0081] Back clip 4 structure: Back clip 4 is recommended to use durable and lightweight materials such as nylon reinforced plastic or aluminum alloy. The design of protrusion and cover plate 5 should consider its detachability to facilitate maintenance and replacement. Cover plate 5 is connected with back clip 4 through screws, and stainless steel material can be used to ensure corrosion resistance during long-term use.

[0082] Installation method: The design of back clip 4 needs to make it easily slide into the designated position of terminal support 1 and be fixed through threads or buckles. When fixed, it should ensure firm installation and resistance to vibration and external interference.

[0083] 5. Wire and adapter connection

[0084] The connection of wire and adapter is an important link of electrical transmission:

[0085] Conductor material selection: It is recommended to use highly conductive copper-core cables covered with heat-resistant, abrasion-resistant insulation materials such as silicone or polyethylene. The conductor cross-sectional area should be designed according to the current load requirements to ensure safe and stable current transmission.

[0086] Wiring method: The wires can be connected to the contacts by crimping or welding. When crimping, use professional crimping tools to ensure a tight connection between the wires and the contacts. When welding, be sure to use low-temperature solder to avoid damaging the insulation layer of the wires.

[0087] 6. Insurance type test plug integrated with PLC system

[0088] The fuse test plug in this solution is connected to the PLC system through wires and adapters:

[0089] Plug design: The plug can be constructed of a durable plastic shell, while ensuring that the exterior of the plug provides adequate electrical insulation and anti-interference capabilities. The plug size and contact shape should be customized according to the interface specifications of the PLC device under test to ensure a tight fit between the test plug and the PLC device.

[0090] Wiring design in the PLC cabinet: In the PLC test cabinet, wires should be routed as neatly as possible to avoid crossing and tangling. Wire troughs or cable management devices can be installed inside the cabinet to ensure easy access during maintenance or replacement.

[0091] 7. Security and Maintenance

[0092] To ensure safety during use:

[0093] Safety protection: All electrical contacts and connectors should have adequate electrical insulation to prevent the risk of electric shock from exposed electrical parts. Heat shrink tubing or protective sleeves can be used to further insulate the connection between contacts and wires.

[0094] Easy-to-maintain structure: The detachable design of the sub-terminal and the back clip 4 facilitates daily maintenance and replacement, and the use of screws or snap-on structures ensures ease of operation.

[0095] The above further describes in detail the technical solution provided by the present invention through several specific implementation methods in order to highlight the advantages and benefits of the technical solution provided by the present invention. However, the several specific implementation methods described above are not intended to limit the present invention. Any reasonable modification and improvement of the present invention, combination of implementation methods and equivalent replacement based on the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A PLC cabinet fuse terminal combination test tool, characterized in that: The test tooling includes: Fuse terminal block, The fuse terminal group includes a sub-terminal 1 and a sub-terminal 2, each of which includes a base and a contact. The base is a rectangular parallelepiped structure, and a through hole is provided on a side wall of the rectangular parallelepiped structure with the smallest surface area. The contact is a cylindrical structure and is telescopically arranged in the through hole; The sub-terminal 1 and the sub-terminal 2 are arranged in parallel and staggered; There are at least two fuse terminal groups, which are detachably connected to On the terminal bracket.

2. A PLC cabinet fuse terminal combined test fixture according to claim 1, characterized in that: The terminal bracket surface has a groove, and one of the sub-terminals in the fuse terminal group is arranged in the groove, so that the sub-terminal 1 and the sub-terminal 2 are arranged in parallel and staggered.

3. A PLC cabinet fuse terminal combined test fixture according to claim 1, characterized in that: The terminal support is provided with a hole on the side wall, and the sub-terminal 1 and the sub-terminal 2 are provided with a protrusion on the side wall. The sub-terminal 1 and the sub-terminal 2 are connected to the terminal support through the interference fit of the hole and the protrusion.

4. A PLC cabinet fuse terminal combined test fixture according to claim 1, characterized in that: On the rectangular parallelepiped structure, an edge close to the contact and away from the terminal support is chamfered.

5. A PLC cabinet fuse terminal combined test fixture according to claim 1, characterized in that: The contact is connected to the base through a spring.

6. A PLC cabinet fuse terminal combined test fixture according to claim 5, characterized in that: The axis of the spring coincides with the axis of the contact.

7. A PLC cabinet fuse terminal combined test fixture according to claim 1, characterized in that: It also includes a back clip, which is a rectangular structure and is detachably fixed to a side wall of the terminal bracket away from the insurance terminal group. A protrusion is provided at one end of the back clip close to the insurance terminal group, and the protrusion faces the terminal bracket.

8. A PLC cabinet fuse terminal assembly test fixture according to claim 7, characterized in that: The back clip is connected to the terminal bracket via a cover plate. After the cover plate is detachably connected to the back clip, it is detachably connected to the terminal bracket.

9. Insurance type test plug, characterized in that, It comprises the test fixture and adapter according to claim 1, wherein the adapter is connected to the at least two fuse terminal groups respectively through wires, and the wires penetrate from one end of the through hole away from the contact and are connected to the contact.

10. Insurance type PLC test cabinet, characterized in that, The cabinet is connected to the PLC under test via the safety test plug described in claim 9.

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