An assembled strip resistor

Abstract

The present invention discloses an assembled strip resistor, comprising a resistor strip and a mounting assembly, wherein multiple bends of the resistor strip are clamped by two sets of mounting assemblies; each set of mounting assemblies comprises a string rod, an insulating ring and a stopper, each stopper comprises a mounting portion and a hook for holding the bend of the resistor strip, the hook and the mounting portion are fixed to each other, the mounting portion is provided with a connecting hole for the string rod to pass through, and an extension space is left laterally at the bend of the hook, so that the bend of the resistor strip can be thermally deformed and extended toward both sides. The present invention uses a bend to tighten the bends of the resistor strip, and there is no need to open a hole in the resistor strip, and there is no need to consider the position accuracy of the opening, which is convenient for manufacturing. An extension space is left laterally at the bend of the hook, so that after the resistor strip is heated during operation, its bend can be thermally deformed and extended toward both sides in the extension space, thereby avoiding the middle part of the resistor strip from arching and bending, and preventing the distance between two adjacent sections of the resistor strip from being reduced, thereby ensuring the normal use of the resistor strip.

Description

Technical Field

[0001] The invention relates to the technical field of resistors, and in particular to an assembled strip resistor. Background Art

[0002] Braking resistors are widely used in motor drive systems that require frequent braking and quick stopping, such as in rail transit fields such as subways, light rails, maglevs, and trams, as well as in lifting equipment such as elevators and cranes. They mainly play a protective and energy consumption role. After the power is cut off, the locomotive's motor will continue to rotate for a period of time due to inertia. When the motor rotates by inertia, it will generate voltage in the line like a generator. The braking resistor is connected to the line and can consume electrical energy, that is, it consumes the kinetic energy of the motor, and the motor will stop faster.

[0003] The braking resistor in traditional technology generally includes multiple sheet-shaped resistors, the ends of which are welded in series, combined with components such as porcelain parts and string rods for blocking insulation to form a resistor with the required resistance value. However, the manufacturing process of this resistor is complicated and costly, which is not conducive to large-scale production. In addition, no current flows through the welding point where the two ends of the resistor are attached to each other, and the resistor material cannot be fully utilized.

[0004] Later, a continuous bending strip resistor structure with integrated resistors appeared. For example, the patent application number is 201621167383.2, and the name is a strip grounding resistor. At the bend of the continuous bending resistor strip, a bracket is used to weld and fix the resistor, and then a string rod is used to string the brackets together to form a whole. Although the welding of this resistor strip is more convenient than the traditional resistor sheet welding, it still has the following defects: the welding requirements are relatively high. If the welding quality is not good, it will cause poor contact at the resistor welding part and burn the entire resistor.

[0005] Later, the snap-on resistor appeared. Holes were first opened along the length of the straight resistor strip. The positions of these holes were precise, so that after the entire resistor strip was continuously bent, the pre-opened holes were located exactly at the bends, so that the arranged clamps could be inserted into the holes at different bends. This structure has high requirements for opening holes. The distance between two adjacent holes must be accurate. Even if a long hole is opened, the distance from the center line of the hole to the two wide sides of the resistor strip must be accurate, otherwise the arranged clamps cannot be smoothly inserted into each hole.

[0006] Whether welding or clamping, the resistance belt is firmly fixed. The resistance belt generates heat and expands during operation, and tends to deform. The bending part cannot stretch and deform, and the resistance belt can only bend in the middle toward its own side, resulting in a reduction in the distance between two adjacent sections of the resistance belt or even a short circuit. Summary of the invention

[0007] In view of the above technical problems in the prior art, the present invention provides an assembled strip resistor that is easy to manufacture.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] Provided is an assembled strip resistor, comprising a continuously bent resistor strip and two parallel groups of mounting components, the two groups of mounting components are respectively located on both sides of the resistor strip, and multiple bends of the resistor strip are clamped by the two groups of mounting components; the characteristic is that each group of mounting components comprises a string rod, a plurality of insulating rings and a plurality of limiting members, the string rod strings together the plurality of insulating rings and the plurality of limiting members, and two adjacent limiting members are separated by the insulating rings, each limiting member comprises a mounting portion and a hook for pulling the bend of the resistor strip, the hook and the mounting portion are fixed to each other, the mounting portion is provided with a connecting hole for the string rod to pass through, and an extension space is left laterally at the bend hook, so that the bend of the resistor strip can be extended toward both sides by thermal deformation.

[0010] Wherein, the hook of each limiting member includes an upper hook and a lower hook, and the upper hook and the lower hook jointly tighten a bending part of the resistance belt.

[0011] Wherein, the limiting member is an integrated structure.

[0012] Wherein, the insulating ring is a porcelain ring.

[0013] Wherein, the limiting component is a metal component.

[0014] Among them, a protrusion extends from one end of the insulating ring, and a groove matched with the protrusion is provided at the other end. The protrusion cooperates with the groove of the adjacent insulating ring to form a clamping structure with protrusions and concave embedded in the axial direction between the two adjacent insulating rings.

[0015] Wherein, the protrusion is a step protrusion, and the groove is a step groove corresponding to the step protrusion.

[0016] Wherein, a mounting plate is included, and the end of the string rod is mounted on the mounting plate.

[0017] Beneficial effects of the present invention:

[0018] Compared with the prior art, the assembled strip resistor of the present invention uses a hook to tighten the bends of the resistor strip, and there is no need to open holes in the resistor strip, so there is no need to consider the position accuracy of the holes, and the manufacturing is convenient. The hook has an extension space to the side, so that after the resistor strip is heated during operation, its bend can be thermally deformed and extended in both directions in the extension space, avoiding the middle part of the resistor strip from arching and bending, preventing the distance between two adjacent sections of the resistor strip from being reduced, and ensuring the normal use of the resistor strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 14 is a three-dimensional diagram of an assembled strip resistor in an embodiment.

[0020] Figure 2 It is a stereoscopic diagram of the installation assembly in the embodiment.

[0021] Figure 3 It is a three-dimensional diagram of the limiting member in the embodiment.

[0022] Figure 4 It is a stereoscopic view of the insulating ring in the embodiment.

[0023] Reference numerals:

[0024] Resistance band 1;

[0025] The mounting assembly 2 , the string rod 21 , the insulating ring 22 , the step protrusion 221 , the step groove 222 , the stopper 23 , the mounting portion 231 , the connecting hole 2311 , the upper hook 232 , and the lower hook 233 . DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0027] The assembled strip resistor of this embodiment is as follows Figure 1 As shown, it includes a continuously curved resistance belt 1 and two parallel groups of mounting components 2, the two groups of mounting components 2 are respectively located on both sides of the resistance belt 1, and each bending part of the resistance belt 1 is clamped by the two groups of mounting components 2. Figure 2 and Figure 3 As shown, each group of mounting components 2 includes a string rod 21, a plurality of porcelain insulating rings 22 and a plurality of metal limiting members 23. The string rod 21 strings together the plurality of insulating rings 22 and the plurality of limiting members 23, and two adjacent limiting members 23 are separated by the insulating ring 22. Each limiting member 23 includes a mounting portion 231, an upper hook 232 and a lower hook 233 of an integrated structure. The mounting portion 231 is provided with a connecting hole 2311 for the string rod 21 to pass through. The upper hook 232 and the lower hook 233 of a limiting member 23 jointly tighten a bend of the resistance band 1. The resistance band 1 is installed by tightening the bends of the resistance band 1. There is no need to drill holes in the resistance band 1, and there is no need to consider the position accuracy of the holes as in the prior art, which is convenient for manufacturing. The bending diameters of the upper hook 232 and the lower hook 233 are larger than the thickness of the resistance band 1, so that the bends face toward Figure 1 Extension space is left on both sides in the direction indicated by the middle dotted arrows, so that after the resistance belt 1 heats up during operation, the bent part of the resistance belt 1 can be thermally deformed and extended in the extension space, avoiding the middle part of the resistance belt 1 from arching and bending in the axial direction of the string rod 21, thereby preventing the distance between two adjacent segments of the resistance belt 1 from decreasing, and ensuring the normal use of the resistance belt 1.

[0028] In this embodiment, combined with Figure 4As shown, a step protrusion 221 extends from one end of the insulating ring 22, and a step groove 222 matching the step protrusion 221 is provided at the other end. The step protrusion 221 cooperates with the step groove 222 of the adjacent insulating ring 22 so that a clamping structure of convex and concave inlays in the axial direction is formed between the two adjacent insulating rings 22. The step protrusion 221 and the step groove 222 cooperate with each other to provide multiple positioning, which makes assembly more convenient and the structure more stable.

[0029] There are two ways to install the above strip resistors:

[0030] Method 1: In the initial state of the stopper 23, the upper hook 232 and the lower hook 233 are straight plates, or only slightly bent, so that the distance between the upper hook 232 and the lower hook 233 is greater than the width of the resistance band 1, so that the bending part of the resistance band 1 is placed between the upper hook 232 and the lower hook 233. During assembly, first combine the stopper 23 in the initial state with the string rod 21 and the insulating ring 22 to assemble the installation assembly 2 in the preparatory state, and then install the bent resistance band 1, and use pliers and other tools to increase the bending degree of the upper hook 232 and the lower hook 233, so that the resistance band 1 is stuck between the upper hook 232 and the lower hook 233 and cannot fall out. Finally, fix the string rod 21 on the peripheral mounting plate.

[0031] Method 2: First, bend the upper hook 232 and the lower hook 233 of the limiting member 23 to form a Figure 3 The structure shown in the figure is then inserted into the resistance belt 1 from the end of the resistance belt 1, and each of the limiters 23 can slide on the resistance belt 1 to each bend. Then, the insulating ring 22 and the string rod 21 are assembled. Finally, the string rod 21 is fixed to the peripheral mounting plate.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An assembled strip resistor, comprising a continuously curved resistor strip and two parallel groups of mounting components, the two groups of mounting components are respectively located on both sides of the resistor strip, and multiple curved portions of the resistor strip are clamped by the two groups of mounting components; the characteristics are: Each set of mounting components includes a string rod, a plurality of insulating rings and a plurality of limiting members, the string rod strings the plurality of insulating rings and the plurality of limiting members together, and two adjacent limiting members are separated by the insulating rings, each limiting member includes a mounting portion and a hook for pulling the bending part of the resistance belt, the hook and the mounting portion are fixed to each other, the mounting portion is provided with a connecting hole for the string rod to pass through, and an extension space is left at the hook toward the side, so that the bending part of the resistance belt can be extended toward both sides by thermal deformation; The hook of each limiter includes an upper hook and a lower hook, and the upper hook and the lower hook jointly tighten a bend of the resistance belt; The mouths of the upper hook and the lower hook are arranged opposite to each other; The distance between the upper hook and the lower hook is greater than the width of the resistance band, and the bending part of the resistance band is placed between the upper hook and the lower hook.

2. The assembled strip resistor according to claim 1, characterized in that: The limiting component is an integrated structure.

3. The assembled strip resistor according to claim 1, characterized in that: The insulating ring is a porcelain ring.

4. The assembled strip resistor according to claim 1, characterized in that: The limiting component is a metal component.

5. The assembled strip resistor according to claim 1, characterized in that: A protrusion extends from one end of the insulating ring, and a groove matching the protrusion is provided at the other end. The protrusion matches the groove of the adjacent insulating ring to form a clamping structure with protrusions and concave recesses in the axial direction between the two adjacent insulating rings.

6. The assembled strip resistor according to claim 5, characterized in that: The protrusion is a step protrusion, and the groove is a step groove corresponding to the step protrusion.

7. The assembled strip resistor according to claim 1, characterized in that: A mounting plate is included, on which the ends of the string rods are mounted.

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