Painted wire-wound resistor

Abstract

The utility model discloses a painted wire wound resistor which comprises a porcelain tube, clamping rings are sleeved at two ends of the porcelain tube, the clamping rings are fixed on two sides of the porcelain tube in a welding manner, alloy wires are uniformly wound on the outer wall of the porcelain tube, two ends of the porcelain tube are connected with a bracket through the clamping rings, the bracket is welded with the clamping rings, and insulating layers are arranged on the surface of the porcelain tube and the surfaces of the alloy wires. The clamping ring comprises a ring body, the ring body is provided with a plurality of fixing parts, the fixing parts can be bent in the radial direction of the ring body, in the first state, the fixing parts are of a straight strip-shaped structure, in the second state, the fixing parts are of a bent strip-shaped structure, and the fixing parts are matched to form a clamping jaw structure. According to the utility model, the snap ring is welded with the porcelain tube, the bracket is welded with the snap ring, and the porcelain tube is connected with the bracket through the snap ring, so that the resistor wound by the painted wire is integrated and is more convenient to install, and compared with a screw fixing mode, the bracket is welded with the snap ring, so that the vibration and impact resistance can be improved.

Description

Technical Field

[0001] This utility model relates to the field of resistor technology, specifically to a wire-wound resistor with varnish. Background Technology

[0002] A resistor is commonly referred to simply as a resistor in everyday life. It is a current-limiting component; when connected in a circuit, its resistance value is fixed, and it typically has two leads. It limits the current flowing through the branch it is connected to. Resistors with a fixed resistance value are called fixed resistors. Resistors with a variable resistance value are called potentiometers or variable resistors. An ideal resistor is linear, meaning the instantaneous current through the resistor is directly proportional to the applied instantaneous voltage.

[0003] Existing wire-wound resistors with varnish are usually separate electrical and mechanical interfaces, requiring separate installation. Moreover, the resistor and bracket are generally fixed with screws, which not only makes the installation operation more cumbersome, but also makes them less resistant to vibration and impact. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned above in the background technology and to propose a resistor wound with varnished wire.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A wire-wound resistor includes: a ceramic tube, with retaining rings fitted at both ends of the ceramic tube and the retaining rings fixed to both sides of the ceramic tube by welding; an alloy wire is uniformly wound around the outer wall of the ceramic tube; a bracket is connected to both ends of the ceramic tube through the retaining rings; the bracket is welded to the retaining rings; and an insulating layer is provided on the surface of the ceramic tube and the surface of the alloy wire.

[0007] As a further embodiment of this utility model: the retaining ring includes a ring body, and the ring body is provided with multiple fixing parts.

[0008] As a further embodiment of this utility model: the fixing part can be bent radially along the ring body;

[0009] In the first state, the fixing part is a straight strip structure;

[0010] In the second state, the fixing part is a bent strip structure, and several fixing parts cooperate to form a claw structure.

[0011] As a further embodiment of this invention, the ring body is provided with a protrusion.

[0012] As a further embodiment of this utility model: the bracket is provided with a connecting part and a mounting part, and the connecting part and the mounting part are integrally formed.

[0013] As a further embodiment of this utility model, the connecting part is provided with a through hole.

[0014] As a further embodiment of this utility model, multiple locking positions are provided around the through hole.

[0015] As a further embodiment of this utility model: the fixing part is disposed in the card slot.

[0016] As a further embodiment of this invention, the insulating layer is a varnish layer.

[0017] As a further embodiment of this utility model, the mounting part is provided with a mounting groove.

[0018] The beneficial effects of this utility model are:

[0019] In this invention, the retaining ring is welded to the ceramic tube, and the bracket is welded to the retaining ring. The ceramic tube and the bracket are connected by the retaining ring, making the wire-wound resistor with enamel coating an integral unit, which is more convenient to install. Moreover, compared with the screw fixing method, the welding of the bracket and the retaining ring can improve the vibration and impact resistance. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of the varnished wire-wound resistor of this utility model;

[0022] Figure 2 This is a schematic diagram of the retaining ring in its first state;

[0023] Figure 3 This is a schematic diagram of the retaining ring in the second state;

[0024] Figure 4 yes Figure 1 A schematic diagram of the structure of the central support.

[0025] In the picture:

[0026] 1. Ceramic tube; 2. Snap ring; 21. Ring body; 22. Protrusion; 23. Fixing part; 3. Bracket; 31. Connecting part; 311. Through hole; 312. Locking position; 32. Mounting part. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1 As shown, this utility model is a wire-wound resistor with enamel coating, including: a ceramic tube 1, with retaining rings 2 sleeved at both ends of the ceramic tube 1, and the retaining rings 2 are fixed to both sides of the ceramic tube 1 by welding, and the welding method is spot welding.

[0029] For details, please refer to Figures 2-3 As shown, the retaining ring 2 includes a ring body 21, and the ring body 21 is provided with a plurality of fixing parts 23, which can be bent radially along the ring body 21.

[0030] Please see Figure 2 As shown, before assembly, i.e. in the first state, the fixing part 23 of the wire-wound resistor has a straight strip structure.

[0031] Please see Figure 3 As shown, after the wire-wound resistor is assembled, i.e. in the second state, the installer bends the fixing part 23 inward. At this time, the fixing part 23 is a bent strip structure, and multiple fixing parts 23 cooperate to form a claw shape.

[0032] Furthermore, a protrusion 22 is provided on the ring body 21 to facilitate positioning of the retaining ring 2 during assembly.

[0033] Please see Figure 1 , Figure 4 As shown, an alloy wire is evenly wound around the outer wall of the ceramic tube 1, and the ceramic tube 1 with the alloy wire wound around it serves as a resistor. The two ends of the ceramic tube 1 are connected to the bracket 3 through the retaining ring 2. The bracket 3 is welded to the retaining ring 2. An insulating layer, which is a varnish layer, is provided on the surface of both the ceramic tube 1 and the surface of the alloy wire.

[0034] Specifically, the bracket 3 is provided with a connecting part 31 and a mounting part 32, which are integrally formed. The mounting part 32 has a mounting groove for assembling the entire resistor. The connecting part 31 has a through hole 311, and multiple locking positions 312 are provided around the through hole 311. The fixing part 23 of the ring 21 is provided in the locking position 312, and the retaining ring 2 and the bracket 3 are welded by cold welding.

[0035] It should be noted that an insulating layer is coated not only on the surface of the ceramic tube 1 and the surface of the alloy wire, but also on the contact surface between the retaining ring 2 and the ceramic tube 1, and the contact surface between the bracket 3 and the ceramic tube 1, so that the various components of the resistor are mutually insulated.

[0036] In resistors, the electrical interface typically refers to the point where the resistor connects to an external circuit. In wire-wound resistors, the electrical interface is generally located at both ends of the alloy wire, using conductive terminals to contact the external circuit. The mechanical interface is the part of the resistor used for fixing and supporting it, usually using screws or fasteners to connect the resistor to the bracket. In existing technology, wire-wound resistors typically have separate electrical and mechanical interfaces, requiring separate installation. First, the bracket is installed, then the resistor is mounted on the bracket using screws through the mechanical interface, and finally, it is connected to the external circuit through the electrical interface on the resistor. This separate installation method is not only inconvenient in operation, but the use of screws to connect the resistor to the bracket also results in weak resistance to vibration and shock.

[0037] In this embodiment, since the retaining ring 2 is welded to the ceramic tube 1 and the bracket 3 is welded to the retaining ring 2, the ceramic tube 1 and the bracket 3 are connected by the retaining ring 2, making the varnished wire-wound resistor an integral unit, which is more convenient to install. Moreover, compared with the screw fixing method, the welding of the bracket 3 and the retaining ring 2 can improve the vibration and impact resistance.

[0038] It is understandable that the retaining ring 2 can be made of metal, including but not limited to copper and alloys. In this case, the retaining ring 2 is in contact with the alloy wire and conducts electricity, so the retaining ring 2 can be used as part of the electrical interface to connect to the external circuit.

[0039] This application can be applied to the field of rail transit as a high-power varnished wire-wound resistor that integrates electrical and mechanical interfaces.

[0040] The working principle of this utility model is as follows: the retaining ring 2 is welded to the ceramic tube 1, and the bracket 3 is welded to the retaining ring 2, so that the wire-wound resistor is integrated, which makes it more convenient to install. Moreover, compared with the screw fixing method, the welding of the bracket 3 to the retaining ring 2 can improve the vibration and impact resistance.

[0041] The foregoing has provided a detailed description of one embodiment of the present invention, but the description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A painted wire-wound resistor, characterized by The application relates to a porcelain tube (1) which is sleeved with a clamping ring (2) at both ends, and the clamping ring (2) is fixed to the porcelain tube (1) at both sides by welding. The outer wall of the porcelain tube (1) is uniformly wound with alloy wires, the two ends of the porcelain tube (1) are connected with a support (3) through the clamping ring (2), the support (3) is welded with the clamping ring (2), and the surface of the porcelain tube (1) and the surface of the alloy wires are both provided with an insulating layer. The clamping ring (2) comprises a ring body (21) which is provided with a plurality of fixing parts (23).

2. A painted wire-wound resistor according to claim 1, characterized in that The fixing part (23) can be radially bent along the ring body (21).

3. A painted wire-wound resistor according to claim 2, wherein In a first state, the fixing part (23) is a flat strip structure. In a second state, the fixing part (23) is a bent strip structure, and a plurality of the fixing parts (23) cooperatively form a clamping claw structure. The ring body (21) is provided with a protruding part (22).

4. A painted wire-wound resistor according to claim 2, wherein The support (3) is provided with a connecting part (31) and a mounting part (32), and the connecting part (31) and the mounting part (32) are integrally formed.

5. A painted wirewound resistor according to claim 3, wherein The connecting part (31) is provided with a through hole (311).

6. A painted wire-wound resistor according to claim 5, wherein A plurality of clamping sites (312) are arranged around the through hole (311).

7. A painted wire-wound resistor according to claim 6, wherein The fixing part (23) is arranged in the clamping site (312).

8. A painted wire-wound resistor according to claim 7, wherein The insulating layer is a paint layer.

9. The painted wirewound resistor of claim 1 wherein, The mounting part (32) is provided with a mounting groove.

10. A painted wirewound resistor according to claim 5, wherein ​

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