High-voltage flexible lead leading-out terminal resistor rod

Abstract

The utility model discloses a high-voltage flexible lead leading-out terminal resistor rod which comprises a resistor assembly and a metal shell. The resistance wire group is formed by connecting a plurality of resistance wires in series and / or in parallel, the two wiring terminals are fixedly connected to the two ends of the resistance wire group respectively, the two flexible leads are fixedly connected to one ends of the two wiring terminals respectively, and the resistance assembly is arranged in the metal shell in a penetrating mode. Meanwhile, the two flexible leads respectively extend out of two opposite ends of the metal shell in a sealing manner, and a magnesium oxide filler is tightly filled between the resistor assembly and the inner wall of the metal shell. The high-voltage flexible lead leading-out terminal resistor rod has the advantages of being simple and reasonable in structure, high in heat dissipation efficiency, large in power, small in size, easy to realize modular / integrated design, easy to process and assemble, high in assembling efficiency, low in assembling and manufacturing cost and the like, and the application market is very wide.

Description

Technical Field

[0001] The utility model relates to the technical field of resistors, in particular to a high-voltage soft lead terminal resistor rod. Background Art

[0002] As we all know, the braking resistor is a carrier used to consume the regenerative energy of the motor in the form of heat energy. It includes two important parameters: resistance value and power capacity. At present, the braking resistor is usually selected in engineering as shown in the following figure. Figure 1 The resistor rod A structure shown is as follows: the resistor rod A7 is provided with a cylindrical rod body 70 and two connection terminals A71 respectively extending out of the axial ends of the rod body 70 through sealing heads A72.

[0003] During the processing and assembly of the brake resistor, several resistor rods A need to be connected in series and parallel according to the design requirements. However, since the portion of the terminal A71 extending outside the rod body 70 is relatively short, this causes great trouble for the electrical connection between the resistor rods A, thereby increasing the difficulty and complexity of the processing and assembly of the brake resistor.

[0004] In view of this, the present utility model is proposed. Summary of the Invention

[0005] In order to overcome the above-mentioned defects, the utility model provides a high-voltage soft lead terminal resistor rod, which has the advantages of simple and reasonable structure, high heat dissipation efficiency, high power, small size, easy modular / integrated design, easy processing and assembly, high assembly efficiency, low assembly production cost, etc., and has a very broad application market.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a high-voltage soft lead terminal resistor rod, including a resistor component and a metal shell, the resistor component is provided with a resistance wire group composed of multiple resistance wires connected in series and / or in parallel, two wiring terminals respectively fixedly connected to the two ends of the resistance wire group, and two soft leads respectively fixedly connected to one end of the two wiring terminals, the resistor component is inserted into the metal shell, and at the same time, the two soft leads are respectively sealed and extended out of the opposite ends of the metal shell, and magnesium oxide filler is also tightly filled between the resistor component and the inner wall of the metal shell.

[0007] As a further improvement of the present invention, functional layers are plated at the locations where the wiring terminals are connected to the resistance wire group and the soft lead respectively.

[0008] As a further improvement of the present invention, the parts where the wiring terminals are connected to the resistance wire group and the soft lead are defined as joining parts;

[0009] The functional layer consists of a nickel-plated layer plated on the connecting portion and a silver-plated layer coated outside the nickel-plated layer.

[0010] As a further improvement of the present invention, the resistance wire is made of copper-nickel alloy material.

[0011] As a further improvement of the present invention, the metal shell is a hollow cylindrical structure made of stainless steel material, and sealing heads are sealed at both axial ends of the metal shell.

[0012] As a further improvement of the present invention, epoxy resin is poured into the axial ends of the metal shell and cured to form the plugging head.

[0013] As a further improvement of the present invention, the portion where the wiring terminal is connected to the soft lead is embedded in the blocking head.

[0014] As a further improvement of the present invention, the wiring terminal is in the shape of a round rod, and the wiring terminal and the metal shell are arranged with a coaxial line.

[0015] As a further improvement of the present invention, protective covers capable of covering the outside of the blocking head are further provided at both axial ends of the metal shell.

[0016] As a further improvement of the present invention, a fixing clamp ring for integrally mounting the resistor rod is fixedly sleeved on the outside of the metal shell.

[0017] The beneficial effects of the present invention are as follows: The resistor rod of the present invention has the following advantages: ① Compared with the prior art terminal A, which is hard and has a short length extending outside the rod body, the present invention adopts a soft lead with controllable length and good flexibility and bendability, making the resistor rod simpler and more convenient to connect electrically, thereby greatly improving the convenience and assembly efficiency of the brake resistor during processing and assembly; in addition, compared with the terminal A, the soft lead is almost unaffected by the size of the metal shell, so the cross-sectional area of ​​the soft lead can be designed to be larger, which can greatly improve its conductivity and heat dissipation performance. ② The resistor rod has the advantages of high power, small size, and easy modular / integrated design. In this way, while meeting the design requirements of high-power resistors well, it does not occupy too much space or increase costs, greatly expanding the application range of the resistor rod. ③ The resistor rod has the advantage of high heat dissipation efficiency, that is, the resistor rod can quickly and efficiently dissipate the heat generated inside it, allowing the resistor rod to operate normally for a long time. ④ The structure of the resistor rod is simple and reasonable, easy to process and manufacture, and has low production cost, which is conducive to production implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of the resistor rod A in the prior art;

[0019] Figure 2 This is a structural diagram of the high-voltage flexible lead terminal resistor rod of the utility model;

[0020] Figure 3 for Figure 2 The cross-sectional structure diagram of the high-voltage flexible lead terminal resistor rod is shown;

[0021] Figure 4 for Figure 3 The figure shows a partially enlarged schematic diagram of the cross-sectional structure of the high-voltage soft lead terminal resistor rod.

[0022] The following description is made with reference to the accompanying drawings:

[0023] 1. Resistor assembly; 10. Resistance wire assembly; 11. Terminal block; 12. Flexible lead; 2. Metal housing; 3. Magnesium oxide filler; 4. Plug; 5. Protective cover; 6. Fixing ring; 7. Resistor rod A; 70. Rod body; 71. Terminal block A; 72. Plug A. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] Example 1:

[0026] Please see the attached Figure 2 To the attached Figure 4 As shown, this embodiment 1 provides a high-voltage soft lead terminal resistor rod, which includes a resistor assembly 1 and a metal shell 2. The resistor assembly 1 is provided with a resistance wire group 10 composed of multiple resistance wires connected in series and / or in parallel according to design requirements, two wiring terminals 11 fixedly connected to the two ends of the resistance wire group 10, and two soft leads 12 fixedly connected to one end of the two wiring terminals 11. The resistor assembly 1 is inserted into the metal shell 2, and the two soft leads 12 are sealed and extended out of the opposite ends of the metal shell 2. In addition, the space between the resistor assembly 1 and the inner wall of the metal shell 2 is tightly filled with magnesium oxide filler 3 that performs heat conduction and heat dissipation functions. Supplementary explanation: The soft lead 12 adopts a soft lead structure commonly used on the market, that is, it includes a lead body composed of multiple strands of copper wire twisted together and an insulating layer wrapped around the lead body.

[0027] As can be seen from the above, the resistor rod provided in this embodiment 1 has the following advantages: ① Compared to the prior art terminal A, which is rigid and has a relatively short extension from the rod body 70, this embodiment 1 utilizes a flexible lead with controllable length and good flexibility and bendability, making electrical connection of the resistor rod simpler and more convenient, thereby greatly improving the convenience and efficiency of assembly during the processing of the brake resistor. Furthermore, compared to the terminal A, the flexible lead is almost unaffected by the size of the metal housing 2, and thus the cross-sectional area of ​​the flexible lead can be designed to be larger, thereby significantly improving its electrical conductivity and heat dissipation performance. ② The resistor rod has the advantages of high power, small size, and easy modular / integrated design. This not only meets the design requirements of high-power resistors, but also does not occupy excessive space or increase costs, greatly expanding the application range of the resistor rod. ③ The resistor rod has the advantage of high heat dissipation efficiency, that is, the resistor rod can quickly and efficiently conduct / dissipate the heat generated within it, allowing the resistor rod to operate normally for a long time.

[0028] The specific structure of the high-voltage flexible lead terminal resistor rod described in this embodiment is described in detail below.

[0029] First, in order to further improve the working performance of the resistance rod described in this embodiment, this embodiment also plates a functional layer that can enhance the bonding strength, conductivity, etc. at the parts where the terminal 11 is connected to the resistance wire group 10 and the soft lead 12 respectively.

[0030] Specifically, if the portion where the terminal block 11 is connected to the resistance wire group 10 and the soft lead 12 is defined as a joint portion, the functional layer is composed of a nickel-plated layer plated on the joint portion and a silver-plated layer coated on the outside of the nickel-plated layer. It is understandable that in this embodiment, a nickel-plated layer is first plated on the portion where the terminal block 11 is connected to the resistance wire group 10 and the portion where the terminal block 11 is connected to the soft lead 12, and then a silver-plated layer is plated on the nickel-plated layer; wherein the nickel-plated layer can greatly improve the bonding between the terminal block 11 and the resistance wire group 10, and between the terminal block 11 and the soft lead 12, and can also improve the mechanical strength of the silver-plated layer; the silver-plated layer can improve the electrical conductivity, thereby ensuring the conduction performance of the resistor assembly 1 in a high-voltage and high-temperature environment.

[0031] Furthermore, the resistance wire in this embodiment is made of copper-nickel alloy. Copper-nickel alloy has good electrical conductivity, corrosion resistance, and high temperature resistance, and can be well used in high-power electronic devices.

[0032] Next, in order to ensure and optimize the sealing performance of the resistor rod described in this embodiment, this embodiment has the following structural design: Please continue to refer to the attached Figure 3 and attached Figure 4 As shown, in this embodiment, the metal housing 2 is a hollow cylindrical structure made of stainless steel. By pouring epoxy resin into the axial ends of the metal housing 2 and curing it to form plugging heads 4 (i.e., plugging heads 4 are sealed at the axial ends of the metal housing 2), the axial ends of the metal housing 2 can be sealed. Furthermore, in this embodiment, protective covers 5 are provided at the axial ends of the metal housing 2, which can be mounted outside the plugging heads 4 to further seal and protect the components within the metal housing 2.

[0033] In addition, based on the arrangement of the above-mentioned plugging head 4, it can be understood that the portion where the terminal 11 is connected to the soft lead 12 is buried in the plugging head 4, which can greatly improve the voltage resistance level of the resistor rod to the ground.

[0034] Furthermore, based on the aforementioned structure of the metal housing 2, when the resistor assembly 1 is inserted into the metal housing 2, the connecting terminal 11, which is preferably a round rod and made of copper, is arranged concentrically with the metal housing 2. It is understood that, due to the positional relationship of the connecting terminal 11 relative to the metal housing 2, the resistor wire assembly 10 can be arranged concentrically with the metal housing 2 as much as possible, thereby ensuring that the magnesium oxide filler 3 is evenly filled and distributed, and heat is evenly distributed.

[0035] Next, in order to facilitate the installation and fixation of the resistor rod, this embodiment also provides a fixed clamping ring 6 for the overall installation of the resistor rod outside the metal shell 2, which can be seen in the attached figure. Figure 2 shown.

[0036] Finally, the suffixes "A", "B", etc. in the component names in this application description (such as terminal block, terminal block A, etc.) are only for the convenience of description and are not used to limit the scope of implementation of the patent of this invention.

[0037] To sum up, the high-voltage soft lead terminal resistor rod described in the present invention has the advantages of simple and reasonable structure, high heat dissipation efficiency, high power, small size, easy modular / integrated design, easy processing and assembly, high assembly efficiency, low assembly production cost, etc., and has a very broad application market.

[0038] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A high voltage flexible lead terminal resistor rod, characterized by: The invention comprises a resistor assembly (1) and a metal shell (2), wherein the resistor assembly (1) is provided with a resistor wire group (10) consisting of a plurality of resistor wires connected in series and / or in parallel, two wiring terminals (11) respectively fixedly connected to the two ends of the resistor wire group (10), and two soft leads (12) respectively fixedly connected to one end of the two wiring terminals (11), the resistor assembly (1) is inserted into the metal shell (2), and the two soft leads (12) are respectively sealed and extended out of the opposite ends of the metal shell (2), and a magnesium oxide filler (3) is also tightly filled between the resistor assembly (1) and the inner wall of the metal shell (2).

2. The high-voltage flexible lead terminal resistor rod according to claim 1, characterized in that: Functional layers are plated on the portions of the wiring terminal (11) where the wiring terminal (11) is connected to the resistance wire group (10) and the soft lead (12).

3. The high-voltage flexible lead terminal resistor rod according to claim 2, characterized in that: The portions where the connection terminals (11) are connected to the resistance wire group (10) and the soft lead (12) are defined as joints; The functional layer consists of a nickel-plated layer plated on the connecting portion and a silver-plated layer coated outside the nickel-plated layer.

4. The high-voltage flexible lead terminal resistor rod according to claim 1, characterized in that: The resistance wire is made of copper-nickel alloy material.

5. The high-voltage flexible lead terminal resistor rod according to claim 1, characterized in that: The metal shell (2) is a hollow cylindrical structure made of stainless steel, and sealing heads (4) are provided at both axial ends of the metal shell (2) for sealing.

6. The high-voltage flexible lead terminal resistor rod according to claim 5, characterized in that: Epoxy resin is poured into the axial ends of the metal shell (2) and cured to form the plugging head (4).

7. The high-voltage flexible lead terminal resistor rod according to claim 5, characterized in that: The portion where the connection terminal (11) is connected to the soft lead (12) is embedded in the blocking head (4).

8. The high-voltage flexible lead terminal resistor rod according to claim 5, characterized in that: The connecting terminal (11) is in the shape of a round rod, and the connecting terminal (11) and the metal shell (2) are arranged on the same central axis.

9. The high-voltage flexible lead terminal resistor rod according to claim 5, characterized in that: Protective covers (5) capable of covering the outside of the plugging head (4) are also provided at both axial ends of the metal shell (2).

10. The high-voltage flexible lead terminal resistor rod according to claim 1, characterized in that: A fixing clamping ring (6) for mounting the resistor rod as a whole is fixedly sleeved on the outside of the metal shell (2).

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