A tape-wound resistor structure

Abstract

The technical problem that the utility model wants to solve provides a kind of winding resistance structure, this winding resistance structure is easy to install, and heat dissipation is sufficient, and resistance parameter can be adjusted by adjusting resistance length.The winding resistance structure includes ceramic framework and winding resistance wire, ceramic framework includes first ceramic piece, second ceramic piece and multiple third ceramic pieces and is connected by connecting structure;First ceramic piece, second ceramic piece and multiple third ceramic pieces are provided with ceramic spiral rib along the axial direction and form spiral groove, and winding resistance wire is wound in spiral groove body, and the both ends of winding resistance wire are respectively provided with connector;By adjusting the quantity of multiple third ceramic pieces, the total length of ceramic framework and the length of winding resistance wire are adjusted, so that the parameter of resistor reaches the required parameter;According to the need, the pitch of ceramic spiral rib is adjusted, so that the entire winding resistance wire obtains the required sufficient heat dissipation space, and can be fully heat-dissipated.

Description

Technical Field

[0001] This utility model relates to the field of electrical component technology, specifically to a wrapped resistor structure. Background Technology

[0002] A wire-stripe resistor is a type of resistor made by winding nickel-chromium alloy wire onto a ceramic frame. The resistance wire is generally made of a nickel-chromium alloy with a certain resistivity, and the insulating frame is generally made of ceramic material. The resistance wire is usually wound by machine, and the ceramic part is fired into the corresponding shape to match the wound resistance wire.

[0003] There are two existing technical solutions. The first method involves firing threaded ceramic parts of a specified size to match threaded resistance wires of a specified length. This method can only produce resistance wires with a specified resistance value and cannot adjust the resistance value of the resistance wire. The second method involves firing semi-threaded modular ceramic parts. By adjusting the number of modular ceramic parts, the length of the resistance ceramic parts can be adjusted, and the resistance value can be adjusted. This structure has strict requirements for the resistance wire. The resistance wire must be wound with a certain spacing. It is not possible to naturally separate the resistance wire by matching it with the ceramic parts during assembly. Assembly is more complicated and slower. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a ribbon-wound resistor structure, which is easy to install, has sufficient heat dissipation, and whose resistance parameters can be adjusted by adjusting the resistor length.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a wound resistor structure, including a ceramic skeleton and a wound resistor wire, wherein the ceramic skeleton includes a first ceramic part, a second ceramic part and a plurality of third ceramic parts;

[0006] The first ceramic component, multiple third ceramic components, and the second ceramic component are connected by a connecting structure and arranged sequentially from top to bottom;

[0007] The first ceramic component, the second ceramic component, and multiple third ceramic components are provided with ceramic spiral ribs along the axial direction on their outer side walls. The ceramic spiral ribs form spiral grooves on the corresponding ceramic components, and multiple spiral grooves are connected in the vertical direction to form a complete spiral groove body.

[0008] The winding resistance wire is wound in the spiral groove, with the upper end of the winding resistance wire located in the spiral groove on the first ceramic part and the lower end of the winding resistance wire located in the spiral groove on the second ceramic part.

[0009] The upper and lower ends of the wound resistance wire are respectively provided with connectors.

[0010] Furthermore, the connection structure includes a connecting screw;

[0011] The first ceramic component, the second ceramic component, and multiple third ceramic components all have hollow channels inside and are adapted to the connecting screw;

[0012] The first ceramic part has a first semi-circular notch at its lower end, the second ceramic part has a second semi-circular notch at its upper end, and each third ceramic part has a third semi-circular notch and a fourth semi-circular notch at its upper and lower ends, respectively. The third semi-circular notch and the fourth semi-circular notch are symmetrical on the projection plane.

[0013] When the first ceramic component, multiple third ceramic components, and the second ceramic component are arranged sequentially from top to bottom, the first ceramic component, multiple third ceramic components, and the second ceramic component fit together through multiple semi-circular notches.

[0014] The lower end of the connecting screw passes through the hollow channels of the first ceramic component, multiple third ceramic components, and the second ceramic component in sequence, and the two ends of the connecting screw are located on the outside of the first ceramic component and the second ceramic component, respectively.

[0015] The connecting screw is provided with a first fastening nut and a second fastening nut at both ends.

[0016] Furthermore, a first mica sheet is provided between the first fastening nut and the first ceramic part, and the first mica sheet is sleeved on the upper end of the connecting screw.

[0017] A second mica sheet is provided between the second fastening nut and the second ceramic part, and the second mica sheet is sleeved on the lower end of the connecting screw.

[0018] Furthermore, a first insulator is provided at the upper end of the first ceramic component;

[0019] The first insulator is sleeved on the upper end of the connecting screw and in contact with the first mica sheet; a third fastening nut is provided on the upper end of the connecting screw.

[0020] A second insulator is provided at the lower end of the second ceramic component;

[0021] The second insulator is sleeved on the lower end of the connecting screw and in contact with the second mica sheet. The lower end of the connecting screw is provided with a fourth fastening nut.

[0022] Furthermore, a first washer is provided between the third fastening nut and the first insulator to prevent the first insulator from moving around, and the first washer is sleeved on the connecting screw.

[0023] The middle part of the first gasket is recessed downward to form a first protrusion, which matches the inner end face of the upper end of the first insulator and is located inside the inner end face of the first insulator.

[0024] A second washer is provided between the fourth fastening nut and the second insulator to prevent the second insulator from moving around, and the second washer is sleeved on the connecting screw.

[0025] The middle part of the second gasket protrudes upward to form a second protrusion, which matches the inner end face of the lower end of the second insulator and is located inside the inner end face of the second insulator.

[0026] Furthermore, the connector includes a rectangular conductive electrode sheet, one end of which is provided with an arc-shaped opening that is adapted to the size of the first ceramic part or the second ceramic part;

[0027] The conductive electrode sheet is secured to the first or second ceramic component through an arc-shaped opening;

[0028] The conductive electrode sheet is welded to the end of the winding resistance wire to serve as the input or output end of the winding resistance wire.

[0029] The beneficial effects of this utility model are as follows:

[0030] 1. By adjusting the number of multiple third ceramic components, the total length of the ceramic frame and the length of the winding resistance wire can be adjusted to achieve the required parameters of the resistor. In addition, since the first ceramic component, multiple third ceramic components, and the second ceramic component are connected by a connecting structure, the adjustment and installation are relatively convenient.

[0031] 2. The pitch of the ceramic spiral ribs can be adjusted as needed to provide sufficient heat dissipation space for the entire winding resistance wire, enabling it to dissipate heat effectively. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the ribbon-wound resistor structure described in this utility model;

[0033] Figure 2 This is an exploded view of the ribbon-wound resistor structure described in this utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the first ceramic component described in this utility model;

[0035] Figure 4 This is a cross-sectional view of the first ceramic part described in this utility model;

[0036] Figure 5 This is a schematic diagram of the structure of the second ceramic component described in this utility model;

[0037] Figure 6 This is a cross-sectional view of the second ceramic component described in this utility model;

[0038] Figure 7This is a schematic diagram of the structure of the third ceramic component described in this utility model;

[0039] Figure 8 This is a cross-sectional view of the third ceramic component described in this utility model;

[0040] Figure 9 This is a schematic diagram of the structure of the connector described in this utility model;

[0041] The markings in the diagram are as follows: 1. Ceramic skeleton; 101. First ceramic component; 102. Second ceramic component; 103. Third ceramic component; 104. Ceramic spiral rib; 105. Spiral groove; 2. Wrapped resistance wire; 3. Connecting screw; 4. First semi-circular notch; 5. Second semi-circular notch; 6. Third semi-circular notch; 7. Fourth semi-circular notch; 8. First fastening nut; 9. Second fastening nut; 10. First mica sheet; 11. Second mica sheet; 12. First insulator; 13. Second insulator; 14. Third fastening nut; 15. Fourth fastening nut; 16. First washer; 17. Second washer; 18. Conductive electrode sheet; 19. Arc-shaped opening; 20. Hollow channel; 21. Wiring hole. Detailed Implementation

[0042] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] It should be noted that all directional indicator terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" in the embodiments of this application 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 component 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. They are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0044] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0046] like Figure 1-9 As shown, the winding resistor structure includes a ceramic skeleton 1 and a winding resistance wire 2. The ceramic skeleton 1 includes a first ceramic component 101, a second ceramic component 102 and a plurality of third ceramic components 103.

[0047] The first ceramic component 101, multiple third ceramic components 103 and the second ceramic component 102 are connected by a connecting structure and arranged sequentially from top to bottom. The connecting structure allows for convenient and quick connection of the first ceramic component 101, multiple third ceramic components 103 and the second ceramic component 102. The number of multiple third ceramic components 103 is installed according to actual needs, thereby adjusting the total length of the ceramic frame 1 and the length of the winding resistance wire 2 so that the parameters of the resistor reach the required parameters.

[0048] The first ceramic component 101, the second ceramic component 102, and the multiple third ceramic components 103 are all provided with ceramic spiral ribs 104 along the axial direction on their outer side walls. The ceramic spiral ribs 104 form spiral grooves 105 on the corresponding ceramic components. The multiple spiral grooves 105 are connected in the vertical direction to form a complete spiral groove. The pitch of the ceramic spiral ribs 104 can be adjusted and customized according to actual needs, that is, the width of the spiral groove 105 can be changed so that when the resistance wire 2 is wound in the spiral groove 105, it can obtain the required heat dissipation space and can dissipate heat fully.

[0049] The winding resistance wire 2 is wound in the spiral groove body. The upper end of the winding resistance wire 2 is located in the spiral groove 105 on the first ceramic part 101, and the lower end of the winding resistance wire 2 is located in the spiral groove 105 on the second ceramic part 102. Since the winding resistance wire 2 and the ceramic part are fully threaded, the winding resistance wire 2 does not need to be spread during processing, which makes the processing and transportation of the winding resistance wire 2 convenient.

[0050] The upper and lower ends of the wound resistance wire 2 are respectively provided with connectors 18, which serve as the input and output ends of the wound resistance wire 2, facilitating the connection of the circuit.

[0051] like Figure 1-8 As shown, in this embodiment, preferably, the connection structure includes a connecting screw 3;

[0052] The first ceramic component 101, the second ceramic component 102 and the multiple third ceramic components 103 are all provided with hollow channels 20 and are adapted to the connecting screws 3;

[0053] The lower end of the first ceramic part 101 is provided with a first semi-circular notch 4, the upper end of the second ceramic part 102 is provided with a second semi-circular notch 5, and the upper and lower ends of each third ceramic part 103 are respectively provided with a third semi-circular notch 6 and a fourth semi-circular notch 7. The third semi-circular notch 6 and the fourth semi-circular notch 7 are symmetrical on the projection plane.

[0054] When the first ceramic component 101, multiple third ceramic components 103, and second ceramic component 102 are arranged sequentially from top to bottom, the first ceramic component 101, multiple third ceramic components 103, and second ceramic component 102 fit together through multiple semi-circular notches. That is, the lower end of the first ceramic component 101 is provided with a first semi-circular notch 4, which complements the upper end of the third ceramic component 103. The two semi-circular notches fit together perfectly, so that the lower end of the first ceramic component 101 is tightly connected to the upper end of the third ceramic component 103. This allows the ceramic spiral ribs 104 on the first ceramic component 101 to be tightly connected to the ceramic spiral ribs 104 on the uppermost third ceramic component 103. Similarly, the multiple third ceramic components 103 and the lowermost third ceramic component 103 and the second ceramic component 102 are connected in sequence through the semi-circular notches to form a complete spiral-shaped ceramic spiral rib body.

[0055] The lower end of the connecting screw 3 passes through the hollow channel 20 of the first ceramic part 101, a plurality of third ceramic parts 103 and the second ceramic part 102 from top to bottom, and the two ends of the connecting screw 3 are located on the outside of the first ceramic part 101 and the second ceramic part 102 respectively.

[0056] The connecting screw 3 is provided with a first fastening nut 8 and a second fastening nut 9 at both ends. The first ceramic part 101, multiple third ceramic parts 103 and the second ceramic part 102 are pressed and fixed by the first fastening nut 8 and the second fastening nut 9, so that they form a complete ceramic skeleton 1 that will not separate. When it is necessary to adjust the total length of the ceramic skeleton 1 and the length of the winding resistance wire 2, it is only necessary to unscrew the first fastening nut 8, remove the first ceramic part 101, and add or remove the required number of third ceramic parts 103 to adjust the total length of the ceramic skeleton 1, thereby adjusting the length of the winding resistance wire 2.

[0057] like Figure 2 As shown, in this embodiment, in order to improve the electrical characteristics of insulation withstand voltage, a first mica sheet 10 is provided between the first fastening nut 8 and the first ceramic part 101, and the first mica sheet 10 is sleeved on the upper end of the connecting screw 3.

[0058] A second mica sheet 11 is provided between the second fastening nut 9 and the second ceramic part 102. The second mica sheet 11 is sleeved on the lower end of the connecting screw 3. The mica sheet has the characteristics of insulation, high temperature resistance and corrosion resistance. The first ceramic part 101, multiple third ceramic parts 103 and the second ceramic part 102 are connected by the screw, the mica sheet and two fastening nuts, which isolates the winding resistance wire 2 from the screw and effectively improves the electrical characteristics of insulation and withstand voltage.

[0059] like Figure 1 , Figure 2 As shown, in this embodiment, in order to further improve the electrical characteristics of insulation withstand voltage, a first insulator 12 is provided at the upper end of the first ceramic part 101.

[0060] The first insulator 12 is sleeved on the upper end of the connecting screw 3 and contacts the first mica sheet 10. The upper end of the connecting screw 3 is provided with a third fastening nut 14.

[0061] A second insulator 13 is provided at the lower end of the second ceramic component 102;

[0062] The second insulator 13 is sleeved on the lower end of the connecting screw 3 and contacts the second mica sheet 11. The lower end of the connecting screw 3 is provided with a fourth fastening nut 15. The corresponding insulator is fixed to the screw by the corresponding fastening nut, so that the winding resistance wire 2 of this structure is isolated from the outer shell of the resistor. The two insulators at both ends serve as electrical isolation between the resistor support and the winding resistance wire 2, which further improves the electrical performance of insulation withstand voltage.

[0063] like Figure 2 As shown, in this embodiment, in order to prevent the insulator from moving, a first washer 16 is provided between the third fastening nut 14 and the first insulator 12 to prevent the first insulator 12 from moving. The first washer 16 is sleeved on the connecting screw 3.

[0064] The first gasket 16 is recessed downward to form a first protrusion. The first protrusion matches the inner end face of the upper end of the first insulator 12. The first protrusion is located inside the inner end face of the first insulator 12. It should be noted that a through hole for connecting the screw 3 is opened at the center of the first protrusion.

[0065] A second washer 17 is provided between the fourth fastening nut 15 and the second insulator 13 to prevent the second insulator 13 from moving. The second washer 17 is sleeved on the connecting screw 3.

[0066] The second gasket 17 has a second protrusion protruding upward in the middle. The second protrusion matches the inner end face of the lower end of the second insulator 13. The second protrusion is located inside the inner end face of the second insulator 13. It should be noted that the center of the second protrusion has a through hole for the connecting screw 3 to pass through. The gasket and the corresponding protrusion can effectively prevent the insulator from moving and ensure its stability.

[0067] like Figure 9 As shown, in this embodiment, preferably, the connector 18 includes a rectangular conductive electrode sheet. One end of the conductive electrode sheet is provided with an arc-shaped opening 19 and is adapted to the size of the first ceramic part 101 or the second ceramic part 102. The other end of the conductive electrode sheet is rounded to reduce corners and avoid scratches during wiring.

[0068] The conductive electrode sheet is mounted on the first ceramic part 101 or the second ceramic part 102 through the arc-shaped opening 19, and can cooperate with the ceramic part assembly. The arc-shaped opening 19 allows the conductive electrode sheet to be welded to the end of the winding resistance wire 2 at any position on the first ceramic part 101 or the second ceramic part 102.

[0069] The conductive electrode sheet is welded to the end of the winding resistance wire 2 as the input or output end of the winding resistance wire 2, that is, one of the two conductive electrode sheets serves as the input end and the other serves as the output end.

[0070] In addition, wiring holes 20 can be made on the conductive electrode plates to facilitate wiring.

[0071] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A wound resistor structure, comprising a ceramic skeleton (1) and a wound resistor wire (2), characterized in that: The ceramic skeleton (1) includes a first ceramic component (101), a second ceramic component (102), and a plurality of third ceramic components (103). The first ceramic component (101), a plurality of third ceramic components (103) and the second ceramic component (102) are connected by a connecting structure and arranged in order from top to bottom; The first ceramic part (101), the second ceramic part (102) and a plurality of third ceramic parts (103) are provided with ceramic spiral ribs (104) along the axial direction. The ceramic spiral ribs (104) form spiral grooves (105) on the corresponding ceramic parts. The plurality of spiral grooves (105) are connected in the vertical direction to form a complete spiral groove body. The winding resistance wire (2) is wound in the spiral groove body. The upper end of the winding resistance wire (2) is located in the spiral groove (105) on the first ceramic part (101), and the lower end of the winding resistance wire (2) is located in the spiral groove (105) on the second ceramic part (102). The upper and lower ends of the wound resistance wire (2) are respectively provided with connectors (18).

2. The ribbon-wound resistor structure according to claim 1, characterized in that: The connection structure includes a connecting screw (3); The first ceramic component (101), the second ceramic component (102) and multiple third ceramic components (103) are all provided with hollow channels (20) and are adapted to the connecting screw (3); The first ceramic part (101) has a first semi-circular notch (4) at its lower end, the second ceramic part (102) has a second semi-circular notch (5) at its upper end, and each third ceramic part (103) has a third semi-circular notch (6) and a fourth semi-circular notch (7) at its upper and lower ends respectively. The third semi-circular notch (6) and the fourth semi-circular notch (7) are symmetrical on the projection plane. When the first ceramic part (101), multiple third ceramic parts (103) and the second ceramic part (102) are arranged from top to bottom, the first ceramic part (101), multiple third ceramic parts (103) and the second ceramic part (102) fit together through multiple semi-circular notches. The lower end of the connecting screw (3) passes through the hollow channel (20) of the first ceramic part (101), a plurality of third ceramic parts (103) and the second ceramic part (102) in sequence, and the two ends of the connecting screw (3) are located on the outside of the first ceramic part (101) and the second ceramic part (102) respectively; The connecting screw (3) is provided with a first fastening nut (8) and a second fastening nut (9) at both ends.

3. The ribbon-wound resistor structure according to claim 2, characterized in that: A first mica sheet (10) is provided between the first fastening nut (8) and the first ceramic part (101), and the first mica sheet (10) is sleeved on the upper end of the connecting screw (3); A second mica sheet (11) is provided between the second fastening nut (9) and the second ceramic part (102), and the second mica sheet (11) is sleeved on the lower end of the connecting screw (3).

4. The ribbon-wound resistor structure according to claim 3, characterized in that: The upper end of the first ceramic component (101) is provided with a first insulator (12); The first insulator (12) is sleeved on the upper end of the connecting screw (3) and in contact with the first mica sheet (10). The upper end of the connecting screw (3) is provided with a third fastening nut (14). The lower end of the second ceramic component (102) is provided with a second insulator (13); The second insulator (13) is sleeved on the lower end of the connecting screw (3) and in contact with the second mica sheet (11). The lower end of the connecting screw (3) is provided with a fourth fastening nut (15).

5. The ribbon-wound resistor structure according to claim 4, characterized in that: A first washer (16) is provided between the third fastening nut (14) and the first insulator (12) to prevent the first insulator (12) from moving. The first washer (16) is sleeved on the connecting screw (3). The first gasket (16) is recessed downward to form a first protrusion, which matches the inner end face of the upper end of the first insulator (12). The first protrusion is located inside the inner end face of the first insulator (12). A second washer (17) is provided between the fourth fastening nut (15) and the second insulator (13) to prevent the second insulator (13) from moving. The second washer (17) is sleeved on the connecting screw (3). The middle part of the second pad (17) protrudes upward to form a second protrusion, which matches the inner end face of the lower end of the second insulator (13). The second protrusion is located inside the inner end face of the second insulator (13).

6. The ribbon-wound resistor structure according to claim 5, characterized in that: The connector (18) includes a rectangular conductive electrode sheet, one end of which is provided with an arc-shaped opening (19) that is adapted to the size of the first ceramic part (101) or the second ceramic part (102). The conductive electrode sheet is secured to the first ceramic part (101) or the second ceramic part (102) through an arc-shaped opening (19); The open end of the conductive electrode sheet is welded to the end of the winding resistance wire (2) as the input or output end of the winding resistance wire (2).

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