Combined test tool for safety type terminal of PLC (Programmable Logic Controller) cabinet body

Abstract

The invention discloses a combined type testing tool for a PLC cabinet body safety type terminal, and relates to the technical field of PLC testing. In order to solve the technical problems that in the prior art, existing PLC testing work mainly depends on manual operation, efficiency is low, the error rate is high, consequently, the testing cost is increased, the testing period is prolonged, and even the overall progress of a project is affected, the technical scheme provided by the invention is that a combined testing tool for a PLC cabinet fuse type terminal is provided. 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 combined testing tool. Background Art

[0002] In modern industrial automation systems, PLC (Programmable Logic Controller) is widely used in various automation control and monitoring tasks, and is the core component to ensure system stability and efficiency. Therefore, PLC testing is crucial to the normal operation of the entire industrial automation system. The accuracy and efficiency of the test directly affect the reliability, safety and operating cost of the system. However, the existing PLC testing process still has many limitations and technical difficulties, and needs to be improved urgently.

[0003] At present, PLC testing mainly relies on manual operation, which is complex and error-prone. First, technicians need to manually set the test program according to the specific configuration of the PLC cabinet to be tested. This process usually requires an in-depth understanding of the specifications, functions and interfaces of each PLC module to ensure that the test program can cover all possible working scenarios. However, due to the wide variety and complex configuration of PLC modules, technicians not only need to spend a lot of time setting up the test program, but also easily lead to incomplete coverage or setting errors due to negligence of details.

[0004] After the test program is set up, the tester needs to manually connect the test program with each PLC module according to the program requirements. This process is extremely challenging. Due to its complexity, it has a low fault tolerance rate. A slight mistake may lead to connection errors or missed connections, thus affecting the accuracy of the test results. This manual connection process is particularly time-consuming in actual operation, and usually requires at least two technicians to work together, which increases labor costs and operation time. At the same time, due to the large number of manual operations during the test process, any irregular operation may cause system failures, further reducing the reliability of the test.

[0005] In addition, as the scale and complexity of industrial automation systems continue to increase, traditional manual PLC testing methods can no longer meet the growing demand. During large-scale PLC system testing, problems such as low efficiency and high error rate of manual operation become more prominent, resulting in increased testing costs, longer testing cycles, and even affecting the overall progress of the project.

[0006] In summary, these defects of the existing technology seriously affect the efficiency and reliability of PLC testing, especially in industrial scenarios with increasing automation. Therefore, there is an urgent need for a solution that can simplify the PLC testing process, improve test accuracy and efficiency, reduce reliance on manual operations, reduce the risk of errors, and save manpower and time costs, thereby improving overall testing performance and ensuring the stability and efficiency of industrial automation systems. Summary of the invention

[0007] In order to solve the technical problems existing in the prior art, the existing PLC testing work mainly relies on manual operation, which is inefficient and has a high error rate, resulting in increased testing costs, extended testing cycles, and even affecting the overall progress of the project, the technical solution provided by the present invention is:

[0008] A PLC cabinet fuse terminal combined test tool, the test tool comprising:

[0009] Fuse terminal block,

[0010] The fuse terminal group includes a sub-terminal 1 and a sub-terminal 2, and the sub-terminal 1 and the sub-terminal 2 both include a base and a contact.

[0011] 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.

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

[0013] The sub-terminals 1 and 2 are arranged in parallel and staggered;

[0014] The fuse terminal group has at least two terminals, which are detachably connected to the

[0015] on the terminal bracket.

[0016] Furthermore, a preferred embodiment is provided, wherein a groove is provided on the surface of the terminal bracket, and one of the sub-terminals in the safety terminal group is arranged in the groove, so that the sub-terminal 1 and the sub-terminal 2 are arranged in parallel and staggered.

[0017] Furthermore, a preferred embodiment is provided, wherein holes are provided on the side walls of the terminal bracket, protrusions are provided on the side walls of sub-terminal 1 and sub-terminal 2, and sub-terminal 1 and sub-terminal 2 are connected to the terminal bracket through interference fit of the holes and protrusions.

[0018] Furthermore, a preferred embodiment is provided, in which an edge of the rectangular parallelepiped structure close to the contact and away from the terminal support is chamfered.

[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, wherein 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 safety terminal group. A protrusion is provided at one end of the back clip close to the safety 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 inventive concept, the present invention also provides a safety test plug, including the test tooling and an adapter, wherein the adapter is respectively connected to the at least two safety terminal groups through a wire, and the wire penetrates from one end of the through hole away from the contact and is connected to the contact.

[0024] Based on the same inventive concept, the present invention also provides a safety type PLC test cabinet, and the cabinet is connected to the PLC under test through the safety type test plug.

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

[0026] The present invention provides a PLC cabinet fuse terminal assembly test fixture, the base and contact design of the test fixture provide a reliable electrical connection effect. The contact is designed as a retractable cylindrical structure, so that different contact requirements can be flexibly responded to during testing. This design effectively prevents contact wear or poor contact, and improves test stability.

[0027] The present invention provides a PLC cabinet fuse terminal combination test fixture, in which the sub-terminals 1 and 2 are arranged in parallel and staggered to achieve a compact design effect of the terminal group. Compared with the traditional parallel terminal group, this staggered design effectively saves space, improves the terminal layout efficiency, and adapts to more types of test environments.

[0028] The present invention provides a PLC cabinet fuse terminal assembly test fixture, which achieves a more stable installation effect through the groove setting of the terminal bracket. The sub-terminals in the groove can reduce looseness or displacement during operation, thereby improving the firmness of the overall structure and the reliability of the test.

[0029] The present invention provides a PLC cabinet fuse terminal assembly test fixture, in which the sub-terminal and the terminal bracket are connected by interference fit through holes and protrusions, thereby enhancing the mechanical strength of the terminal group. This connection method can ensure that the sub-terminal remains stable during repeated plugging and unplugging operations, effectively avoiding the problem of looseness or poor contact during long-term use.

[0030] The invention provides a PLC cabinet fuse terminal assembly test fixture, the chamfer design effectively improves the convenience and safety of operation. The chamfer can reduce the friction when the terminal is inserted or removed, reduce the difficulty of operation, and avoid damage or human injury caused by edges and corners, thereby enhancing the safety of the product.

[0031] The present invention provides a PLC cabinet fuse terminal combined test fixture, in which the contact is connected to the base through a spring, so that the contact has good reset performance when in use. This structure can automatically restore to the initial state after the test, improves operating efficiency, and reduces the risk of misoperation caused by human intervention.

[0032] The invention provides a PLC cabinet fuse terminal assembly test fixture, in which the design of the spring and the contact axis coincides ensures the uniformity and stability of the contact force, further improving the durability and contact performance of the terminal. During use, the spring force will not be offset or uneven, thereby improving the response speed and accuracy of the contact.

[0033] The present invention provides a PLC cabinet fuse terminal combined test fixture, and the back clip design further enhances the installation flexibility and portability of the terminal. By fixing the back clip on the other side of the terminal bracket, the entire test device is more stable while maintaining detachability, which facilitates rapid adjustment and operation in different environments.

[0034] The present invention provides a PLC cabinet fuse terminal assembly test fixture, in which the back clip is connected to the terminal bracket through a cover plate, and the connection method is detachable. This structural design makes the assembly and disassembly of the device easier, while enhancing the integrity and firmness of the structure. When it is necessary to replace components, users can easily operate, reducing maintenance costs.

[0035] The present invention provides a PLC cabinet fuse terminal assembly test fixture, the test fixture and the adapter are connected by wires, and pass through the through hole. This design makes the wiring of the wires more reasonable and reduces interference and loss in the electrical connection. The wires enter from the end of the through hole away from the contact, which helps to avoid bending or damage of the wires due to force.

[0036] The present invention provides a PLC cabinet fuse terminal combined test fixture, and the design of the fuse test plug connected to the PLC through the test fixture and the adapter provides an efficient and stable signal transmission path. During the test process, the integrity and accuracy of the test signal can be ensured, and the error rate is reduced. This design has advantages in the existing PLC test scheme.

[0037] The invention 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 It is a three-dimensional schematic diagram of a PLC cabinet fuse terminal combination test tool;

[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 of

[0043] Figure 6 for Figure 1 Exploded diagram of

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

[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] Embodiment 1: This embodiment provides a PLC cabinet fuse terminal assembly test tool, the test tool comprising:

[0048] Fuse terminal block,

[0049] The fuse terminal group includes a sub-terminal 1 2 and a sub-terminal 2 3, and the sub-terminal 1 2 and the sub-terminal 2 3 both include 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] The fuse terminal group has at least two terminals, which are detachably connected to the

[0054] On terminal bracket 1.

[0055] Among them, the sub-terminal 2 3 is a safety type terminal.

[0056] Embodiment 2. This embodiment is a further limitation of a PLC cabinet fuse terminal combination test tool provided in embodiment 1. The surface of the terminal bracket 1 has a groove, 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] Embodiment 3. This embodiment is a further limitation of a PLC cabinet fuse terminal combination test tool provided in embodiment 1, wherein the terminal bracket 1 is provided with a hole on the side wall, and the sub-terminal 1 2 and the sub-terminal 2 3 are provided with protrusions on the side walls, and the sub-terminal 1 2 and the sub-terminal 2 3 are connected to the terminal bracket 1 through the interference fit of the hole and the protrusion.

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

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

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

[0061] Embodiment 7. This embodiment is a further limitation of a PLC cabinet fuse terminal combination test tool provided in embodiment 1, and also includes a back clamp 4, which is a rectangular structure and is detachably fixed on a side wall of the terminal bracket 1 away from the fuse terminal group. A protrusion is provided at one end of the back clamp 4 close to the fuse terminal group, and the protrusion faces the terminal bracket 1.

[0062] Embodiment 8. This embodiment is a further limitation of a PLC cabinet fuse terminal combination test tool provided in embodiment 7. 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 test plug, including the test tooling and adapter provided in embodiment 1, wherein the adapter is respectively connected to the at least two safety terminal groups through a wire, and the wire penetrates from one 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 through the safety-type test plug provided in embodiment 9.

[0065] Implementation Method XI: Combination Figure 1-7 This embodiment is described in detail by using specific examples to further describe the technical solution provided above. Specifically:

[0066] The test fixture is fixed on the terminal to be tested by the reaction force of the spring inserted into the corresponding terminal to be tested and the pulling force between the back clamp 4 and the terminal to be tested. The contact between the contact and the terminal to be tested (spring compression) realizes the conduction between the terminal to be tested and the test fixture.

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

[0068] The core of the design of the fuse terminal set 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 good insulation and mechanical strength. A through hole is provided on the side wall with the smallest surface area, and the hole diameter should be precisely matched with the diameter of the contact to ensure that the contact will not loosen or get stuck during the telescopic movement.

[0070] Contact material selection: As an electrical contact, it is recommended to use metals with good conductivity, such as copper or silver-plated copper. At the same time, in order to prevent arc erosion on the contact, an anti-oxidation coating can be added to the surface or a layer of precious metal (such as nickel or silver) can be electroplated. The telescopic function of the contact is achieved through a built-in spring, and the spring can be made of stainless steel or nickel-plated steel to ensure the durability and corrosion resistance of the spring.

[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 specifications: The design of the spring needs to be determined according to the telescopic distance of the contact and the load conditions. It is recommended to select a compression spring with moderate stiffness to ensure that the contact has sufficient pressure when in contact and can be quickly reset.

[0074] Axis coaxial design: In order to ensure the stable movement of the contact, the axis of the spring and the contact is designed as a coaxial structure. The concentricity can be ensured through precision mold processing to avoid lateral displacement of the contact when it is subjected to force.

[0075] 3. Terminal bracket 1 design and manufacture

[0076] The design of the terminal bracket 1 should take into account both installation and stability:

[0077] Groove design: In order to realize the parallel staggered arrangement of the sub-terminal 1 2 and the sub-terminal 2 3, the surface of the terminal bracket 1 is provided with a precise groove. The depth and width of the groove should match the size of the sub-terminal to ensure that the sub-terminal can be firmly installed and easy to remove. It is recommended to use aluminum alloy or plastic injection molding technology for the terminal bracket 1, and the material can be selected from engineering plastics with high temperature resistance and excellent insulation performance.

[0078] Interference fit between the protrusion and the hole: The sub-terminal and the terminal bracket 1 are connected by interference fit to ensure a tight fit. The tolerance of the interference fit should be strictly controlled by a precision CNC machine tool or mold to ensure that the connection after assembly is stable and can withstand certain mechanical shocks.

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

[0080] The fixing design between the back clip 4 and the terminal bracket 1 ensures convenient operation during installation and has certain vibration resistance:

[0081] Back clip 4 structure: It is recommended that the back clip 4 be made of durable and lightweight materials, such as nylon reinforced plastic or aluminum alloy. The design of the protrusion and cover plate 5 should take into account their detachability for easy maintenance and replacement. The cover plate 5 is connected to the back clip 4 by screws, and the screws can be made of stainless steel to ensure corrosion resistance during long-term use.

[0082] Installation method: The back clip 4 needs to be designed so that it can be easily slid into the designated position of the terminal bracket 1 and fixed by threads or buckles. When fixing, it should be ensured that the installation is firm and can resist vibration and external interference.

[0083] 5. Connect the wire to the adapter

[0084] The connection between the wire and the adapter is an important part of electrical transmission:

[0085] Wire material selection: It is recommended to use copper core cables with high conductivity and cover the outer layer with high temperature resistant and wear resistant insulating materials such as silicone or polyethylene. The cross-sectional area of ​​the wire should be designed according to the current load requirements to ensure the safety and stability of current transmission.

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

[0087] 6.Integration of insurance test plug with PLC system

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

[0089] Plug structure design: The plug part can use a strong and durable plastic shell, while ensuring that the outside of the plug has sufficient electrical insulation and anti-interference capabilities. The size of the plug and the shape of the contact should be customized according to the interface specifications of the PLC device under test to ensure that the test plug is tightly connected to the PLC device.

[0090] Wiring design in PLC cabinet: In the PLC test cabinet, the wires should be laid as neatly as possible to avoid crossing and entanglement. At the same time, wire troughs or cable management devices can be set inside the cabinet to ensure easy operation when maintenance or replacement is carried out.

[0091] 7. Security and Maintenance

[0092] To ensure safety during use:

[0093] Safety protection: All electrical contacts and connectors should have sufficient electrical insulation to prevent the risk of electric shock caused by exposed electrical parts. The connection between the contact and the wire can be further insulated and protected by heat shrink tubing or protective sleeves.

[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 buckle structures ensures ease of operation.

[0095] The technical solution provided by the present invention is further described in detail above through several specific implementation modes in order to highlight the advantages and benefits of the technical solution provided by the present invention. However, the several specific implementation modes described above are not intended to be used as limitations on the present invention. Any reasonable modification and improvement of the present invention, combination of implementation modes and equivalent substitution within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A PLC cabinet fuse terminal combined test tool, characterized in that: The test tooling comprises: Fuse terminal block, The fuse terminal group includes a sub-terminal 1 and a sub-terminal 2, and the sub-terminal 1 and the sub-terminal 2 both include 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-terminals 1 and 2 are arranged in parallel and staggered; The fuse terminal group has at least two terminals, which are detachably connected to the on the terminal bracket.

2. A PLC cabinet fuse terminal combined test fixture according to claim 1, characterized in that: The terminal support has a groove on its surface, and one of the sub-terminals in the insurance 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 has a hole on its side wall, and the sub-terminal 1 and the sub-terminal 2 have protrusions on their side walls. The sub-terminal 1 and the sub-terminal 2 are connected to the terminal support through 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 assembly 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 assembly 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, and 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 as claimed in claim 1, wherein the adapter is respectively connected to the at least two fuse terminal groups 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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