Step-shaped wiring terminal disc for electric actuating mechanism

Abstract

The utility model relates to a step-shaped wiring terminal plate for an electric actuating mechanism, and relates to the field of wiring terminal plates. According to the technical scheme, the wiring terminal disc comprises a terminal disc plastic base body, multiple rows of weak current terminal M4 inserts and a row of strong current terminal M5 inserts, the multiple rows of weak current terminal M4 inserts and the row of strong current terminal M5 inserts are arranged in a step shape from high to low, and the strong current terminal M5 inserts are located at the bottom of the terminal disc plastic base body; wherein the weak current terminal M4 insert is provided with an M4 threaded hole, and the weak current terminal is fixed on the weak current terminal M4 insert through the cooperation of an M4 screw and the M4 threaded hole; the strong current terminal M5 insert is provided with an M5 threaded hole, and the strong current terminal is fixed on the strong current terminal M5 insert through matching of an M5 screw and the M5 threaded hole; and a strong current cover plate is mounted on the outer side of the strong current terminal. Under the condition, effective distinguishing and protection of strong and weak current wiring areas are realized through structural innovation, and the wiring safety of the electric actuating mechanism is improved.

Description

Technical Field

[0001] This utility model relates to the field of terminal block technology, and in particular to a stepped terminal block for electric actuators. Background Technology

[0002] In industrial automation control systems, electric actuators are core components for precise control of equipment such as valves and dampers. The safety and reliability of their terminal blocks directly affect the stable operation of the entire system. In existing technologies, electric actuator terminal blocks generally adopt a concentric circle layout, concentrating high-voltage terminals in the central area and surrounding them with low-voltage terminals. While this design offers some space utilization, it has significant drawbacks:

[0003] From a structural design perspective, this layout does not physically isolate or differentiate between high-voltage and low-voltage wiring areas; it only uses a simple ring-shaped distribution to divide the areas. In actual wiring operations, due to the small spacing between the high-voltage and low-voltage terminals and the lack of clear structural guidance, operators are prone to accidentally touching the high-voltage terminals in the center area with their tools or hands when connecting low-voltage terminals, posing a risk of electric shock and potential equipment damage due to short circuits.

[0004] From an electromagnetic compatibility perspective, electromagnetic interference generated by high-voltage circuits can easily affect the transmission of weak-voltage signals in the surrounding environment through spatial coupling. This is especially true in high-frequency control scenarios, where unisolated concentric circle structures can lead to signal distortion, reduced control accuracy, or even system malfunctions. Furthermore, after prolonged operation, terminal blocks may become loose due to vibration, temperature rise, or other factors. Arc discharge or overheating faults in high-voltage terminals can more easily affect surrounding weak-voltage terminals, further amplifying safety hazards.

[0005] From the perspective of ease of operation and maintenance costs, the existing structure does not reserve independent operating space or protective measures. During maintenance, both strong and weak current terminals must be exposed simultaneously, increasing the probability of misoperation by maintenance personnel. Especially in harsh industrial environments such as explosion-proof and high-dust environments, this design, which does not achieve effective isolation, cannot meet the requirements of electrical safety standards for separate protection of strong and weak current areas, resulting in compliance risks when the product is used in high-risk scenarios.

[0006] In summary, existing concentric circle terminal blocks lack physical isolation and scientific layout for strong and weak current areas, resulting in significant deficiencies in safety, electromagnetic compatibility, and ease of operation. Structural innovation is urgently needed to effectively distinguish and protect the strong and weak current wiring areas. Summary of the Invention

[0007] The purpose of this invention is to provide a stepped terminal block for electric actuators to solve the problems existing in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A stepped terminal block for an electric actuator includes a terminal block comprising: a terminal block plastic substrate, multiple rows of low-voltage terminal M4 inserts, and a row of high-voltage terminal M5 inserts. The multiple rows of low-voltage terminal M4 inserts and the row of high-voltage terminal M5 inserts are arranged in a stepped manner from high to low, and the high-voltage terminal M5 inserts are located at the bottom of the terminal block plastic substrate.

[0010] The low-voltage terminal M4 insert has an M4 threaded hole, and the low-voltage terminal is fixed to the low-voltage terminal M4 insert by the cooperation of an M4 screw with the M4 threaded hole; the high-voltage terminal M5 insert has an M5 threaded hole, and the high-voltage terminal is fixed to the high-voltage terminal M5 insert by the cooperation of an M5 screw with the M5 threaded hole; a high-voltage cover plate is installed on the outside of the high-voltage terminal.

[0011] In one possible implementation, a high-voltage wire number identifier is provided on the plastic substrate of the terminal block below the high-voltage terminal M5 insert.

[0012] In one possible implementation, a low-voltage wire number identifier is provided on the plastic substrate of the terminal block below the low-voltage terminal M4 insert.

[0013] In one possible implementation, the high-voltage cover is detachably connected to the plastic substrate of the terminal block by cover screws.

[0014] In one possible implementation, the terminal block is installed inside a housing.

[0015] In one possible implementation, the terminal block plastic substrate is integrally injection molded.

[0016] In one possible implementation, the terminal block plastic substrate is made of a resin with electrical insulating properties.

[0017] In one possible implementation, the low-voltage terminal M4 insert and the high-voltage terminal M5 insert are made of conductive brass.

[0018] The beneficial effects of the technical solution provided by this utility model include at least the following:

[0019] The terminal block provided by this technical solution includes a terminal block plastic substrate, multiple rows of low-voltage M4 inserts, and a row of high-voltage M5 inserts. The multiple rows of low-voltage M4 inserts and the row of high-voltage M5 inserts are arranged in a stepped manner from high to low, with the high-voltage M5 inserts located at the bottom of the terminal block plastic substrate. The low-voltage M4 inserts have M4 threaded holes, and the low-voltage terminals are fixed to the low-voltage M4 inserts by M4 screws engaging with the M4 threaded holes. The high-voltage M5 inserts have M5 threaded holes, and the high-voltage terminals are fixed to the high-voltage M5 inserts by M5 screws engaging with the M5 threaded holes. A high-voltage cover plate is installed on the outside of the high-voltage terminals. In this case, by arranging multiple rows of low-voltage terminal M4 inserts and one row of high-voltage terminal M5 inserts in a stepped design from high to low, and installing a high-voltage cover plate on the outside of the high-voltage terminals, the possibility of human hands, wires, etc. touching the high-voltage terminals is eliminated during the subsequent wiring of low-voltage terminals. Through structural innovation, the high-voltage and low-voltage wiring areas are effectively distinguished and protected, improving the safety of wiring operations of electric actuators. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0021] Figure 1 This illustration shows a schematic diagram of the external structure of a stepped terminal block for an electric actuator provided in an exemplary embodiment of the present invention.

[0022] Figure 2 A schematic diagram of the internal structure of a stepped terminal block for an electric actuator provided in an exemplary embodiment of the present invention is shown.

[0023] Figure 3 A side sectional view of a stepped terminal block for an electric actuator provided in an exemplary embodiment of the present invention is shown.

[0024] Figure 4 This diagram illustrates the structure of a stepped terminal block for an electric actuator provided by an exemplary embodiment of the present invention, after the installation of a fully covered high-voltage power plate.

[0025] Figure 5 This illustration shows a schematic diagram of the structure of a stepped terminal block for an electric actuator provided by an exemplary embodiment of the present invention, after the first identifier and the second identifier are set.

[0026] In the diagram: 1. Terminal block; 1a. Terminal block plastic substrate; 1b. Low voltage terminal M4 insert; 1c. High voltage terminal M5 insert; 1d. M4 threaded hole; 1e. M5 threaded hole; 2. M4 screw; 3. Low voltage terminal; 4. M5 screw; 5. High voltage terminal; 6. High voltage cover plate; 7. Cover plate screw; 8. Housing; 9. First identifier; 10. Second identifier. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In this specification, identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings of this utility model, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions towards or away from a specific component, respectively. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more.

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Figure 1 This illustration shows a schematic diagram of the external structure of a stepped terminal block for an electric actuator provided in an exemplary embodiment of the present invention. Figure 2 This illustration shows a schematic diagram of the internal structure of a stepped terminal block for an electric actuator provided in an exemplary embodiment of the present invention. Figure 3This diagram shows a side sectional view of a stepped terminal block for an electric actuator according to an exemplary embodiment of the present invention. The stepped terminal block for the electric actuator includes a terminal block 1, which is installed in a housing 8. The terminal block 1 includes: a terminal block plastic substrate 1a, multiple rows of low-voltage terminal M4 inserts 1b, and a row of high-voltage terminal M5 inserts 1c, arranged from high to low. The high-voltage terminal M5 insert 1c is arranged in a stepped shape, with the high-voltage terminal M5 insert 1c located at the bottom of the plastic substrate 1a of the terminal plate; wherein, the low-voltage terminal M4 insert 1b has an M4 threaded hole 1d, and the low-voltage terminal 3 is fixed to the low-voltage terminal M4 insert 1b by the cooperation of the M4 screw 2 with the M4 threaded hole 1d; the high-voltage terminal M5 insert 1c has an M5 threaded hole 1e, and the high-voltage terminal 5 is fixed to the high-voltage terminal M5 insert 1c by the cooperation of the M5 screw 4 with the M5 threaded hole 1e; a high-voltage cover plate 6 is installed on the outside of the high-voltage terminal 5.

[0031] In this embodiment, a stepped arrangement from high to low is adopted, with multiple rows of low-voltage terminal M4 inserts and a single row of high-voltage terminal M5 inserts layered according to their height difference, so that the high-voltage terminal M5 inserts are located at the bottom of the terminal block's plastic substrate. This three-dimensional layout forms a natural spatial isolation zone: the low-voltage terminal operating area (upper layer) and the high-voltage terminals (lower layer) maintain a safe distance in the vertical direction. When operators connect low-voltage signals, their hand movements are limited to the higher area, physically eliminating the possibility of direct contact between tools or the human body and the lower high-voltage terminals. Compared to the traditional concentric circle planar ring distribution, the stepped design transforms the two-dimensional spacing into three-dimensional protection, ensuring that the operation of the high-voltage and low-voltage areas does not interfere with each other, eliminating the risk of electric shock and short circuit hazards from the source.

[0032] In this embodiment, the solution employs differentiated insert specifications to address the different current levels and wiring requirements of high-voltage and low-voltage circuits. The low-voltage terminal M4 insert is equipped with an M4 threaded hole to accommodate small-diameter control cables, and is secured with an M4 screw to prevent signal attenuation or distortion caused by excessive contact resistance. The high-voltage terminal M5 insert uses an M5 threaded hole to match large-diameter power cables, and, in conjunction with an M5 screw, provides stronger clamping force to meet the mechanical stability requirements of high-current transmission. Furthermore, the integrated injection molding of the insert and the terminal block plastic substrate enhances the structural strength of the high and low voltage interfaces, effectively preventing poor contact or arcing caused by terminal loosening, especially in vibration environments.

[0033] In this embodiment, an independent high-voltage cover is added to the outside of the high-voltage terminal, forming a dual protection mechanism: on the one hand, the high-voltage cover is made of insulating and flame-retardant material, which can isolate the high-voltage terminal from the external environment and prevent dust, liquid or metal foreign objects from entering and causing short circuits; on the other hand, the presence of the high-voltage cover constitutes an operational barrier, which only needs to be removed when it is necessary to connect or repair the high-voltage circuit, and there is no need to touch the high-voltage area when maintaining the low-voltage system in daily life, which significantly reduces the probability of misoperation.

[0034] Furthermore, Figure 4 The diagram shows a structural schematic of a stepped terminal block for an electric actuator provided by an exemplary embodiment of the present invention, after the installation of a complete high-voltage cover plate 6, which is detachably connected to the plastic substrate 1a of the terminal block by cover plate screws 7.

[0035] Furthermore, Figure 5 This illustration shows a schematic diagram of the structure of a stepped terminal block for an electric actuator provided in an exemplary embodiment of the present invention, after the setting of a first identifier and a second identifier. A high-voltage wire identifier 9 is provided on the plastic substrate 1a of the terminal block below the high-voltage terminal M5 insert 1c. A low-voltage wire identifier 10 is provided on the plastic substrate 1a of the terminal block below the low-voltage terminal M4 insert 1b.

[0036] In this embodiment, independent identifiers are set below the high-voltage and low-voltage terminal inserts on the plastic substrate of the terminal block, defining the high-voltage and low-voltage wiring areas through both location zoning and visual symbols. Operators can quickly identify terminal attributes through color, character, or graphic differences, avoiding confusion between high-voltage and low-voltage wiring. The identifiers complement the stepped layout, strengthening the error prevention mechanism, especially reducing the risk of misoperation in complex wiring scenarios, while also facilitating quick location of lines during later maintenance, improving wiring efficiency and operational safety.

[0037] In some embodiments, the terminal block plastic substrate 1a is integrally injection molded.

[0038] In some embodiments, the terminal block plastic substrate 1a is made of a resin with electrical insulating properties.

[0039] In some embodiments, the low-voltage terminal M4 insert 1b and the high-voltage terminal M5 insert 1c are made of brass with conductive properties.

[0040] In this embodiment, the terminal block plastic substrate is manufactured using an integral injection molding process. The integrated molding process ensures the precision of the stepped structure, enhances mechanical strength and vibration resistance, and avoids the potential gap hazards associated with separate assembly. Electrically insulating resin material is selected to isolate the strong and weak current circuits at the substrate level, preventing the risk of creepage. The strong and weak current inserts are made of brass, which utilizes its excellent conductivity and corrosion resistance to ensure low-loss transmission of weak current signals and stable conduction of high current. At the same time, the high-strength threaded holes of brass can withstand repeated disassembly and assembly, improving the durability of the terminal connection and meeting the long-term operating requirements of industrial environments.

[0041] Next, the working principle of a stepped terminal block for an electric actuator, as described in the embodiments of this utility model, will be explained.

[0042] Resin with electrical insulation properties is injected into a mold, and brass strong and weak current terminal inserts are pre-embedded simultaneously to form an integrated terminal plate plastic substrate;

[0043] Multiple rows of low-voltage M4 inserts (upper layer) and a single row of high-voltage M5 inserts (lower layer) are arranged in layers on the substrate to form a three-dimensional isolated stepped structure; the low-voltage terminals are fixed with small-diameter control cables by M4 screws to ensure low signal loss transmission; the high-voltage terminals are fastened with large-diameter power cables by M5 screws to provide the clamping force and mechanical stability required for high current.

[0044] A removable insulating and flame-retardant high-voltage cover is installed on the outside of the high-voltage terminals. The cover is connected to the base through screws. It protects against dust and liquid intrusion during daily use and forms an operational barrier. It is only removed when the high-voltage power is being inspected, reducing the risk of accidental contact. At the same time, corresponding wire number identifiers are injection molded below the high-voltage and low-voltage terminals. The color and character differences help operators quickly identify the terminal attributes. Together with the stepped layout, it forms a dual error prevention mechanism, improving wiring efficiency and maintenance safety.

[0045] After the terminal block is installed in the enclosure, the heat generated by the high voltage is conducted to the metal shell of the enclosure for heat dissipation through the substrate. The low voltage area is far away from the heat source due to its high-level layout. Combined with the electromagnetic shielding properties of the resin substrate, the interference of high voltage to low voltage is reduced.

[0046] In summary, the terminal block provided by this technical solution includes: a plastic substrate for the terminal block, multiple rows of low-voltage M4 inserts, and a row of high-voltage M5 inserts. The multiple rows of low-voltage M4 inserts and the row of high-voltage M5 inserts are arranged in a stepped manner from high to low, with the high-voltage M5 inserts located at the bottom of the plastic substrate for the terminal block. The low-voltage M4 inserts have M4 threaded holes, and the low-voltage terminals are fixed to the low-voltage M4 inserts by M4 screws engaging with the M4 threaded holes. The high-voltage M5 inserts have M5 threaded holes, and the high-voltage terminals are fixed to the high-voltage M5 inserts by M5 screws engaging with the M5 threaded holes. A high-voltage cover plate is installed on the outside of the high-voltage terminals. In this case, by arranging multiple rows of low-voltage terminal M4 inserts and one row of high-voltage terminal M5 inserts in a stepped design from high to low, and installing a high-voltage cover plate on the outside of the high-voltage terminals, the possibility of human hands, wires, etc. touching the high-voltage terminals is eliminated during the subsequent wiring of low-voltage terminals. Through structural innovation, the high-voltage and low-voltage wiring areas are effectively distinguished and protected, improving the safety of wiring operations of electric actuators.

[0047] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A stepped terminal block for an electric actuator, comprising a terminal block (1), characterized in that, The terminal block (1) includes: a terminal block plastic substrate (1a), multiple rows of low-voltage terminal M4 inserts (1b), and a row of high-voltage terminal M5 inserts (1c). The multiple rows of low-voltage terminal M4 inserts (1b) and the row of high-voltage terminal M5 inserts (1c) are arranged in a stepped manner from high to low. The high-voltage terminal M5 inserts (1c) are located at the bottom of the terminal block plastic substrate (1a). The weak current terminal M4 insert (1b) has an M4 threaded hole (1d), and the weak current terminal (3) is fixed to the weak current terminal M4 insert (1b) by the cooperation of the M4 screw (2) with the M4 threaded hole (1d); the strong current terminal M5 insert (1c) has an M5 threaded hole (1e), and the strong current terminal (5) is fixed to the strong current terminal M5 insert (1c) by the cooperation of the M5 screw (4) with the M5 threaded hole (1e); a strong current cover plate (6) is installed on the outside of the strong current terminal (5).

2. The stepped terminal block for an electric actuator according to claim 1, characterized in that, A power line identifier (9) is provided on the plastic substrate (1a) of the terminal block below the power terminal M5 insert (1c).

3. The stepped terminal block for an electric actuator according to claim 1, characterized in that, A low-voltage wire number identifier (10) is provided on the plastic substrate (1a) of the terminal block below the low-voltage terminal M4 insert (1b).

4. The stepped terminal block for an electric actuator according to claim 1, characterized in that, The high-voltage cover plate (6) is detachably connected to the plastic substrate (1a) of the terminal block by cover plate screws (7).

5. The stepped terminal block for an electric actuator according to claim 1, characterized in that, The terminal block (1) is installed in the housing (8).

6. The stepped terminal block for an electric actuator according to claim 1, characterized in that, The terminal block plastic substrate (1a) is integrally injection molded.

7. The stepped terminal block for an electric actuator according to claim 6, characterized in that, The terminal block plastic substrate (1a) is made of a resin with electrical insulating properties.

8. The stepped terminal block for an electric actuator according to claim 1, characterized in that, The low-voltage terminal M4 insert (1b) and the high-voltage terminal M5 insert (1c) are made of brass with conductive properties.

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