Low voltage switch strip of a linear actuator and linear actuator
By insulating the solder joints and designing the groove, the problems of leakage and mechanical damage in low-voltage switch bars of linear actuators have been solved, achieving a switch bar structure with high safety and stability, and expanding the application range.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JIECHANG LINEAR MOTION TECH
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-02
AI Technical Summary
The low-voltage switch bar of existing linear actuators is prone to leakage, especially in metal housings, which can easily lead to abnormal stopping of the push rod or electric shock risk to the human body. In addition, the exposed solder joints are susceptible to electrostatic interference and mechanical damage.
The solder joints are covered with insulating components to form electrical isolation. The insulating components fill the gaps between the solder joints and the inner wall of the tank, as well as the gaps between the wires and the tank. Combined with the protective cover, a multi-layer protection is formed. The insulating materials include epoxy resin, silicone, or engineering plastics, and are formed by injection molding, dispensing curing, or potting.
It effectively blocks the leakage path of current, improves anti-static capability and withstand voltage level, ensures stable operation of the switch bar in high-voltage environment, reduces mechanical damage to solder joints, meets stringent safety protection requirements, and is suitable for industrial automation and medical equipment.
Smart Images
Figure CN224318325U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of linear actuator technology, specifically to a low-voltage switch bar and a linear actuator. Background Technology
[0002] In the control system of linear actuators (such as electric linear actuators), the switch bar, as a core component of the electrical connection, is of paramount importance for its safety and reliability. The switch bar needs to be connected to the controller via wires. Traditional switch bar manufacturing processes, being low-voltage, involve direct use on exposed PCB boards, with solder joints and electrical components directly exposed to the external environment without any insulation protection. In this manner, solder joints are prone to leakage due to moisture, dust, or metallic impurities. Especially when the switch bar is installed inside the metal housing of the linear actuator, leakage can cause the linear actuator to stop abnormally, and may even pose a risk of electric shock. Utility Model Content
[0003] The purpose of this invention is to provide a low-voltage switch bar for a linear actuator and a linear actuator, which can effectively solve the problem of easy leakage of current in the low-voltage switch bar of existing linear actuators.
[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0005] A low-voltage switch bar for a linear actuator includes a switch bar body, an electrical component disposed on the switch bar body, and a wire welded to the electrical component. The wire is welded to the electrical component to form a solder joint. The low-voltage switch bar also includes an insulating component that covers the solder joint to achieve electrical isolation between the solder joint and the external environment.
[0006] In the low-voltage switch bar of the aforementioned linear actuator, a groove is formed on the switch bar body, the solder joint is located in the groove, and the wire is arranged along the length of the groove.
[0007] In the low-voltage switch bar of the aforementioned linear actuator, an insulating element is filled in the gap between the solder joint and the inner wall of the groove to fix the relative position between the solder joint and the switch bar body.
[0008] In the low-voltage switch bar of the aforementioned linear actuator, the insulating material fills the groove at the solder joint.
[0009] In the low-voltage switch bar of the aforementioned linear actuator, an insulating element fills at least part of the gap between the conductor and the groove to fix the relative position of the conductor and the switch bar body.
[0010] In the low-voltage switch bar of the aforementioned linear actuator, the insulating element is made of an insulating material, including epoxy resin, silicone, or engineering plastic.
[0011] In the low-voltage switch bar of the aforementioned linear actuator, the insulating component is formed by injection molding, dispensing curing, or potting filling.
[0012] Linear actuators, including low-voltage switch bars of any of the above schemes, were also disclosed.
[0013] In the above-mentioned linear actuator, the linear actuator also includes a protective cover surrounding the switch bar body.
[0014] In the above-mentioned linear actuator, the inner wall of the protective cover is provided with two fixing grooves, which are spaced apart and have openings facing each other. The switch bar body is provided with a protrusion that is inserted into the corresponding fixing groove to fix the relative position of the switch bar body and the protective cover.
[0015] Compared with the prior art, the advantages of this utility model are:
[0016] By fully enclosing the solder joints with insulating components, a physical insulation barrier is formed, completely isolating the solder joints from direct contact with the external environment. Compared to exposed solder joints in traditional technologies, this solution utilizes the electrical isolation characteristics of the insulating components to effectively block current leakage paths, meeting the stringent safety protection requirements of linear actuators, and is especially suitable for scenarios prone to leakage, such as those with metal casings.
[0017] The encapsulation structure of the insulating components can significantly improve the anti-static capability and withstand voltage rating of the switch bar. In existing technologies, exposed solder joints are susceptible to electrostatic interference and have limited withstand voltage capabilities. However, this solution forms an electrostatic shielding layer and a withstand voltage buffer structure through tight encapsulation of insulating materials, enabling the switch bar to operate stably in high-voltage environments or scenarios with frequent electrostatic discharges. This expands the application range of linear actuators in fields such as industrial automation and medical equipment.
[0018] Furthermore, the switch bar body has grooves, the solder joints are located within the grooves, and the wires are arranged along the length of the grooves. This design overcomes the shortcomings of the arbitrary arrangement of solder joints and wires in traditional switch bars. The physical constraint of the grooves standardizes the wiring, making it particularly suitable for the compact installation environment inside linear actuators. It effectively avoids spatial interference problems caused by wire tangling or exposed solder joints. The grooves form a preliminary physical protective barrier for the solder joints, hiding them within the grooves of the switch bar body and reducing the probability of foreign objects (such as dust and metal particles) directly contacting the solder joints. Compared to traditional unconstrained wire connections, the design of the wires being arranged along the length of the grooves effectively reduces the problem of wires falling off or making poor contact due to mechanical movement.
[0019] Furthermore, an insulating component fills the gap between the solder joint and the inner wall of the tank to fix the relative position between the solder joint and the switch bar body. This filling of the gap forms a rigid connection structure of "solder joint-insulator-tank body." When the linear actuator vibrates during operation, this structure disperses the impact force on the solder joint to the entire tank body, preventing the solder joint from cracking due to independent stress. Compared to traditional technologies where solder joints are fixed solely by welding (which is prone to incomplete welding or detachment due to vibration), this solution utilizes the mechanical support of the insulating component to maintain the stability of the electrical connection of the switch bar under high-frequency vibration conditions.
[0020] Furthermore, the insulating component fills the groove at the solder joint. After filling the groove, the insulating component fills all the gaps between the solder joint and the groove, forming a sealed protective space. On the one hand, the thermal conductivity of the insulating material can assist in heat dissipation from the solder joint, preventing overheating of the component due to long-term operation; on the other hand, the fully filled structure can effectively block the intrusion of contaminants such as moisture and dust, giving the switch bar a high moisture resistance rating and meeting the stable operation requirements in harsh environments such as humidity and dust. Traditional exposed solder joints or partial insulation solutions cannot achieve the same level of protection.
[0021] Furthermore, an insulating component fills the gap between at least a portion of the wire and the slot to fix the relative position of the wire and the switch bar body. This filling of the gap between the insulating component and the slot forms a fixed "wire-insulator-slot" structure. When the linear actuator is running, the tensile force on the wire can be transferred to the slot through the insulating component, preventing stress from acting directly on the solder joints and thus reducing the risk of the wire detaching from the electrical components. The fixing effect of the insulating component on the wire suppresses the wire's movement within the slot. In high-frequency vibration scenarios of linear actuators, traditional unfixed wires are prone to fatigue fracture of the solder joints due to repeated shaking. This solution, however, uses the rigid support of the insulating component to maintain the wire's fixed posture, reducing contact resistance fluctuations caused by mechanical vibration.
[0022] Furthermore, the insulating component is made of an insulating material, including epoxy resin, silicone, or engineering plastics. Epoxy resin's corrosion resistance protects against oil and chemical corrosion; silicone possesses high elasticity and vibration resistance, as well as high moisture resistance; engineering plastics' weather resistance resists UV aging and is suitable for outdoor linear actuators.
[0023] Furthermore, the insulating component is manufactured through injection molding, dispensing curing, or potting filling. Injection molding: suitable for mass standardized production, achieving precise coating of the insulating component through molds, with high production efficiency, and suitable for linear actuator switch bars with high consistency requirements; Dispensing curing: highly flexible, allowing for precise coating of local solder joints, suitable for small-batch customization or repair scenarios, such as personalized production of special-specification linear actuators; Potting filling: suitable for complex structured tanks or simultaneous protection of multiple solder joints, filling gaps with liquid material to ensure no dead corners, suitable for manufacturing switch bars with high protection levels.
[0024] This utility model also discloses a linear actuator. The low-voltage switch bar using any of the above-mentioned schemes has significantly improved electrical safety performance and can meet the requirements of higher safety standards for electric shock protection.
[0025] Furthermore, the linear actuator also includes a protective cover surrounding the switch bar body. The protective cover prevents external mechanical impacts, dust intrusion, and liquid splashes, avoiding wear or aging of insulating components due to long-term exposure. It also provides spatial constraints on the switch bar body, allowing for a more organized layout of the switch bar and other internal actuator components (such as the motor and transmission mechanism). This design overcomes the shortcomings of haphazard switch bar installation in traditional actuators, standardizing wiring through the physical boundaries of the protective cover and preventing wire tangling or component interference.
[0026] Furthermore, the inner wall of the protective cover is provided with two fixing grooves, which are spaced apart and have openings facing each other. The switch bar body is provided with a protrusion that plugs into the corresponding fixing groove to fix the relative position of the switch bar body and the protective cover. The fixing grooves on the inner wall of the protective cover and the protrusions on the switch bar body form a plug-in fit, which can complete the installation without the need for additional fasteners such as screws or glue. The tight plug-in fit between the fixing grooves and the protrusions can form a mechanical limiting structure. When the linear actuator is running, the vibration and impact force on the switch bar is transmitted to the protective cover through the protrusions, avoiding fatigue of the solder joints due to loosening. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of an existing low-voltage switch bar;
[0028] Figure 2 This is a schematic diagram of the structure of the low-voltage switch bar of this utility model;
[0029] Figure 3 This is a schematic diagram of the structure of the protective cover in this utility model;
[0030] Figure 4 This is a schematic diagram of the structure of the protective cover and low-voltage switch bar after assembly in this utility model;
[0031] Figure 5This is a schematic diagram of the installation structure of the low-voltage switch bar in the linear actuator of this utility model;
[0032] Figure 6 This is a schematic diagram of the linear actuator structure of this utility model.
[0033] The attached figures are labeled as follows:
[0034] Switch bar body 10, groove 11, eaves 12, electrical components 20, wires 30, solder joints 40, insulating parts 50, protective cover 60, fixing groove 61, screw 70. Detailed Implementation
[0035] A low-voltage switch bar for a linear actuator includes a switch bar body 10, an electrical component 20 disposed on the switch bar body 10, and a wire 30 welded to the electrical component 20. The wire 30 is welded to the electrical component 20 to form a solder joint 40. The low-voltage switch bar also includes an insulating component 50, which covers the solder joint 40 to achieve electrical isolation between the solder joint 40 and the external environment.
[0036] By fully enclosing the solder joint 40 with the insulating component 50, a physical insulation barrier is formed, completely isolating the solder joint 40 from direct contact with the external environment. Compared to the exposed solder joint 40 in traditional technologies, this solution utilizes the electrical isolation characteristics of the insulating component 50 to effectively block the current leakage path, meeting the stringent safety protection requirements of linear actuators, and is especially suitable for scenarios prone to leakage, such as those with metal casings.
[0037] The encapsulation structure of the insulating component 50 can significantly improve the anti-static capability and withstand voltage rating of the switch bar. In the prior art, the exposed solder joint 40 is susceptible to electrostatic interference and has limited withstand voltage capability. However, this solution forms an electrostatic shielding layer and a withstand voltage buffer structure through the tight encapsulation of insulating material, enabling the switch bar to operate stably in high-voltage environments or scenarios with frequent electrostatic discharge, thus expanding the application range of linear actuators in fields such as industrial automation and medical equipment.
[0038] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0040] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0042] like Figure 1 The diagram shows the structure of a low-voltage switch bar in a conventional linear actuator. The low-voltage switch bar includes a switch bar body 10, an electrical component 20 mounted on the switch bar body 10, and a wire 30 soldered to the electrical component 20. In this embodiment, the electrical component 20 includes two limit switches. The two limit switches are electrically connected to the controller of the linear actuator via the wire 30. The two limit switches correspond to the maximum and minimum travel positions of the linear actuator, respectively. When the actuator of the linear actuator triggers one of the limit switches, the transmission mechanism stops operating. Figure 1In the low-voltage switch bar of the linear actuator shown, the pin of the limit switch passes through the low-voltage switch bar from bottom to top and is soldered to the wire 30 to form a solder joint 40. The limit switch can be fixed in relative position by snapping or bonding it to the body 10 of the low-voltage switch bar. Of course, the electrical component 20 may also include a circuit board, with the circuit board and the limit switch located on opposite sides of the body 10 of the low-voltage switch bar. The limit switch is soldered to the circuit board, and the wire 30 is also soldered to the circuit board, forming a solder joint 40 on the circuit board. This embodiment describes the direct soldering of the wire 30 to the limit switch as an example.
[0043] See Figures 2 to 4 This invention relates to an embodiment of a low-voltage switch bar for a linear actuator. The low-voltage switch bar also includes an insulating component 50. The insulating component 50 covers the solder joint 40 to achieve electrical isolation between the solder joint 40 and the external environment. In other words, the insulating component 50 completely encloses the solder joint 40. This full-coverage design of the insulating component 50 forms a physical insulation barrier, completely isolating the solder joint 40 from direct contact with the external environment. Compared to the exposed solder joint 40 in traditional technologies, this solution utilizes the electrical isolation characteristics of the insulating component 50 to effectively block the current leakage path, meeting the stringent safety protection requirements of linear actuators, and is particularly suitable for scenarios prone to leakage, such as metal casings. The covering structure of the insulating component 50 significantly improves the anti-static capability and withstand voltage rating of the switch bar. In traditional processes, the exposed solder joint 40 is susceptible to electrostatic interference and has limited withstand voltage capability. This solution, however, through the tight covering of insulating material, forms an electrostatic shielding layer and a withstand voltage buffer structure, enabling the switch bar to operate stably in high-voltage environments or scenarios with frequent electrostatic discharge. The insulation component 50's encapsulation design itself provides mechanical protection for the solder joint 40. When the switch bar is subjected to external vibration or pulling, the insulation component 50 can buffer the stress on the solder joint 40, reducing the risk of the solder joint 40 cracking or the wire 30 falling off, thus overcoming the defect of "exposed solder joint 40 being susceptible to mechanical damage" in traditional technology.
[0044] Furthermore, the insulating component 50 is made of an insulating material, including epoxy resin, silicone, or engineering plastics. The properties of various materials can specifically address the technical requirements of different scenarios.
[0045] Epoxy resin: It has high strength and high heat resistance (temperature resistance up to 150℃ and above), and is suitable for solder joint insulation in high-temperature environments, such as linear brakes in industrial machinery; the corrosion resistance of epoxy resin can resist the erosion of oil and chemicals.
[0046] Silicone: It has high elasticity and vibration resistance, and maintains flexibility in a temperature range of -60℃ to 200℃, making it suitable for frequent vibration or drastic temperature changes; the moisture resistance of silicone can meet the IP67 waterproof requirement.
[0047] Engineering plastics: Combining insulation and abrasion resistance, they can be precision-coated through injection molding, making them suitable for applications requiring high mechanical strength (such as aerospace equipment). The weather resistance of engineering plastics protects against UV aging, making them suitable for outdoor linear brakes.
[0048] Compared to the limitations of traditional technologies that rely on a single insulating material (such as ordinary insulating adhesive), this solution offers a wider range of applications through a diverse selection of materials. Materials such as epoxy resin and silicone exhibit strong adhesion to the metal solder joints 40 and the switch strip body 10, forming a tightly bonded integrated structure after curing. For example, epoxy resin bonds to the surface of the solder joint 40 through chemical bonds, achieving high tensile strength and effectively preventing the risk of exposed solder joints 40 due to the detachment of the insulating component 50. In contrast, traditional insulating adhesives typically have insufficient adhesion and are prone to detachment under vibration or temperature changes.
[0049] Furthermore, the insulating component 50 can be formed by injection molding, dispensing and curing, or potting:
[0050] Injection molding: Suitable for mass standardized production, it achieves precise wrapping of insulating parts 50 through molds, with high production efficiency, and is suitable for linear brake switch bars with high consistency requirements;
[0051] Dispensing and curing molding: Highly flexible, it can precisely coat local weld points 40, suitable for small-batch customization or repair scenarios, such as the personalized production of special specification linear brakes;
[0052] Encapsulation and filling molding: Suitable for complex structure tanks 11 or multiple welding points 40 for simultaneous protection. It fills gaps by flowing liquid material to ensure no dead corners and is suitable for manufacturing high protection level switch bars.
[0053] Based on the above embodiment, a groove 11 is provided on the switch bar body 10. The groove 11 is arranged along the length direction of the switch bar body 10, and the cross-section of the groove 11 is U-shaped or arc-shaped. The solder joint 40 is located inside the groove 11, and the wire 30 is arranged along the length direction of the groove 11. This design changes the defect of the random arrangement of solder joint 40 and wire 30 in traditional switch bars. The physical limitation of the groove 11 realizes the standardization of wiring. It is especially suitable for the compact installation environment inside the linear brake, and can effectively avoid spatial interference problems caused by the tangling of wire 30 or the exposure of solder joint 40.
[0054] The groove 11 forms a preliminary physical protective barrier for the solder joint 40, concealing it within the groove of the switch bar body 10 and reducing the probability of foreign objects (such as dust or metal particles) directly contacting the solder joint 40. Compared to the traditional exposed solder joint 40 design, the groove 11 structure reduces the risk of cracking due to mechanical impact or scratches. The design of the wire 30 arranged along the length of the groove 11 lays the structural foundation for subsequent fixation of the wire 30 by the insulating component 50. The positional constraint of the groove 11 on the solder joint 40 and the wire 30 reduces the difficulty of subsequent injection molding or potting of the insulating component 50, avoids uneven insulation caused by component misalignment, and significantly improves the efficiency and consistency of mass production.
[0055] Furthermore, the insulating component 50 fills the gap between the solder joint 40 and the inner wall of the groove 11 to fix the relative position between the solder joint 40 and the switch bar body 10. The insulating component 50 fills the gap between the solder joint 40 and the inner wall of the groove 11, forming a rigid connection structure of "solder joint 40-insulating component 50-groove 11". When the linear brake vibrates during operation, this structure can disperse the impact force on the solder joint 40 to the entire groove 11, preventing the solder joint 40 from cracking due to independent stress. Compared with the traditional technology where the solder joint 40 is fixed by welding (which is prone to poor welding or detachment due to vibration), this solution uses the mechanical support of the insulating component 50 to ensure that the switch bar can maintain the stability of the electrical connection under high-frequency vibration conditions.
[0056] The natural gap between the groove 11 and the solder joint 40 serves as the space for the insulating component 50, eliminating the need for additional structural parts. This design achieves electrical isolation of the solder joint 40 while simultaneously mechanically fixing it through the curing properties of the insulating component 50 (such as the hardening effect of epoxy resin or silicone). This avoids the cumbersome process of having to perform "insulation treatment" and "structural fixing" separately in traditional solutions, simplifying the production process and reducing costs.
[0057] Furthermore, the insulating component 50 completely fills the groove 11 at the solder joint 40, ensuring that the solder joint 40 is completely encased in insulating material, forming a closed protective structure with no exposed areas. This fully filled design completely eliminates any possibility of contact between the solder joint 40 and the external environment, effectively preventing leakage. After the insulating component 50 fills the groove 11, it forms an integrated rigid structure with the switch bar body 10 and the solder joint 40. When the linear brake is subjected to external impact or severe vibration, the fully filled insulating component 50 can evenly distribute the impact force throughout the entire groove 11 area, preventing the solder joint 40 from detaching due to localized stress concentration.
[0058] After the insulating component 50 fills the groove 11, it can fill all the gaps between the solder joint 40 and the groove 11, forming a sealed protective space. On the one hand, the thermal conductivity of the insulating material (such as silicone or epoxy resin) can help the solder joint 40 dissipate heat and prevent the component from overheating due to long-term operation. On the other hand, the fully filled structure can effectively block the intrusion of pollutants such as moisture and dust, enabling the switch bar to achieve a high level of waterproofing and meet the stable operation requirements in harsh environments such as humidity and dust. Traditional exposed solder joints 40 or partial insulation solutions cannot achieve the same level of protection.
[0059] In addition to protecting the solder joint 40, the insulating component 50 also fills at least part of the gap between the conductor 30 and the groove 11 to fix the relative position of the conductor 30 and the switch bar body 10. This forms a fixed structure of "conductor 30-insulator 50-groove 11". When the linear brake is running, the tensile force on the conductor 30 can be transmitted to the groove 11 through the insulating component 50, preventing stress from acting directly on the solder joint 40, thereby reducing the risk of the conductor 30 desoldering from the electrical component 20. Compared with the conventional technology where the conductor 30 is only fixed by welding (which is prone to cracking of the solder joint 40 due to external pulling force), this significantly improves the reliability of the electrical connection.
[0060] The insulating component 50's fixing effect on the wire 30 suppresses the wire 30's swaying within the groove 11. In high-frequency vibration scenarios of linear brakes, traditionally unfixed wires 30 are prone to fatigue fracture of the solder joint 40 due to repeated swaying. This solution, however, uses the rigid support of the insulating component 50 to maintain the wire 30's fixed posture, reducing contact resistance fluctuations caused by mechanical vibration. The design of the insulating component 50's filling gap can accommodate wires 30 of different diameters. When the diameter of the wire 30 changes, only the filling amount or material hardness of the insulating component 50 (e.g., using curable silicone) needs to be adjusted to achieve stable fixing of wires 30 of different specifications without modifying the structure of the groove 11. Compared to traditional mechanical limiting methods such as fixing slots, this design offers greater compatibility with wire 30 specifications, facilitating standardized application of linear brakes in different product models and reducing R&D and production costs.
[0061] This embodiment also discloses a linear brake, including a low-voltage switch bar of any of the above schemes.
[0062] like Figures 3 to 6As shown, based on any of the above embodiments, the linear brake further includes a protective cover 60 surrounding the switch bar body 10. The addition of the protective cover 60 around the switch bar body 10 forms a double safety barrier: "insulating component 50 covering the solder joint 40 + external protection from the protective cover 60." The protective cover 60 can prevent external mechanical impacts, dust intrusion, and liquid splashes, avoiding wear or aging of the insulating component 50 due to long-term exposure. As a standardized component of the linear brake, the protective cover 60 can spatially limit the switch bar body 10, making the layout of the switch bar and other internal components of the brake (such as the motor and transmission mechanism) more orderly. This design changes the defect of arbitrary installation of the switch bar in traditional brakes, achieving standardized wiring through the physical boundary of the protective cover 60, avoiding problems such as wire tangling or component interference.
[0063] In this embodiment, the protective cover 60 not only protects the low-voltage switch bar but also the drive screw 70 of the linear brake, meaning the low-voltage switch bar and the drive screw 70 are arranged parallel to each other. However, to better fix the relative position of the low-voltage switch bar within the protective cover 60, the inner wall of the protective cover 60 is provided with two fixing grooves 61. The two fixing grooves 61 are spaced apart and their openings face each other. The switch bar body 10 is provided with a protrusion 12 that inserts into the corresponding fixing groove 61 to fix the relative position of the switch bar body 10 and the protective cover 60. The fixing grooves 61 on the inner wall of the protective cover 60 and the protrusions 12 of the switch bar body 10 form an interlocking fit, allowing installation to be completed without additional fasteners such as screws or glue. This "slot-type" design reduces the assembly time of the switch bar in a traditional linear brake from 5 minutes to 30 seconds, making it particularly suitable for high-speed operations on automated production lines.
[0064] In this embodiment, the insulating component 50 of the low-voltage switch bar can be injection molded. First, a corresponding mold is made. The wire 30 is welded to the electrical component 20 (such as a limit switch). Then, the welded low-voltage switch bar is placed into the corresponding mold for injection molding, so that the insulating component 50 covers the gap between the weld point 40 and the side wall of the groove 11 within the entire groove 11. It can even fill the entire groove 11 corresponding to the electrical component 20 with the insulating component 50, extending to cover a portion of the length of the wire 30 between it and the groove 11. This ensures that a portion of the wire 30 and the groove 11 corresponding to the electrical component 20 are filled with the insulating component 50, providing excellent insulation and securing the electrical component 20 and the wire 30, preventing the weld point 40 from loosening due to pulling or vibration. Finally, the insulated low-voltage switch bar is installed on the linear brake, for example, by plugging it into the protective cover 60 of the linear brake, thus preventing the low-voltage switch bar from being exposed and providing better protection.
[0065] The insulating component 50 fully encloses the solder joint 40, forming a physical isolation barrier to prevent direct contact between the solder joint 40 and metal parts or the external environment. This eliminates the risk of leakage to metal parts such as the outer pipe from the source. The groove 11 design hides the solder joint 40 within the switch bar body 10, and together with the insulating component 50, fills the gaps to prevent dust and moisture from entering the solder joint 40, improving insulation reliability. The protective cover 60 structure provides external protection, blocking mechanical collisions and liquid splashes, further reducing the probability of damage to the insulating component 50. This solution breaks through the bottlenecks of traditional low-voltage switch bars in terms of safety and structure. Compared with the defects of exposed solder joint 40 or simple insulation treatment in existing technologies, this solution, through a multi-level protective structure and standardized process, significantly improves the anti-static capability, mechanical reliability, and environmental adaptability of the switch bar without relying on high-voltage design, forming a systematic technical advantage from core components to complete machine applications. It is especially suitable for linear brakes with high safety and stability requirements in low-voltage scenarios.
[0066] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.
Claims
1. A low-voltage switch bar for a linear actuator, comprising a switch bar body, an electrical component disposed on the switch bar body, and a wire soldered to the electrical component, wherein the wire is soldered to the electrical component to form a solder joint, characterized in that, The low-voltage switch bar also includes an insulating component that covers the solder joints to achieve electrical isolation between the solder joints and the external environment.
2. The low-voltage switch bar of a linear actuator as described in claim 1, characterized in that, The switch bar body has a groove, the solder joint is located in the groove, and the wire is arranged along the length of the groove.
3. The low-voltage switch bar of a linear actuator as described in claim 2, characterized in that, Insulating material is filled in the gap between the solder joint and the inner wall of the groove to fix the relative position between the solder joint and the switch bar body.
4. The low-voltage switch bar of a linear actuator as described in claim 3, characterized in that, The insulating components fill the groove at the solder joint.
5. The low-voltage switch bar of a linear actuator as described in claim 2, characterized in that, Insulating material fills at least part of the gap between the conductor and the groove to fix the relative position of the conductor and the switch bar body.
6. The low-voltage switch bar of a linear actuator as described in claim 1, characterized in that, The insulating component is made of an insulating material, including epoxy resin, silicone, or engineering plastics.
7. The low-voltage switch bar of a linear actuator as described in any one of claims 1 to 6, characterized in that, The insulating component is formed by injection molding, dispensing and curing, or potting and filling.
8. A linear actuator, characterized in that, Includes the low-voltage switch bar according to any one of claims 1 to 7.
9. The linear actuator as claimed in claim 8, characterized in that, The linear actuator also includes a protective cover surrounding the switch bar body.
10. The linear actuator as claimed in claim 9, characterized in that, The inner wall of the protective cover is provided with two fixing grooves, which are spaced apart and have openings facing each other. The switch bar body is provided with a protruding edge that is inserted into the corresponding fixing groove to fix the relative position of the switch bar body and the protective cover.