Laminated resistor convenient to manufacture

Abstract

The invention relates to the technical field of resistors, in particular to a laminated resistor convenient to manufacture, which comprises a resistor tape and insulating partition plates, the resistor tape is of an integrated strip-shaped structure, the resistor tape is continuously bent in a reciprocating manner to form a plurality of resistor sections parallel to each other, and the insulating partition plates are embedded between two adjacent resistor sections. The resistor section is attached to the side surface of the insulating partition plate; the end part of the insulating partition plate is provided with an open-type abdicating groove, and the abdicating groove is provided with an insulating compensation block, thereby blocking the opening of the abdicating groove. A deformation space is reserved between the compensation block and the groove bottom of the abdicating groove, a bent section between two adjacent resistor sections penetrates through the deformation space, and a distance is reserved between the bent section and the end face of the compensation block as well as between the bent section and the groove bottom of the abdicating groove; a copper bar is arranged on the inner side of the bending section, the compensation block is provided with an elastic limiting bar, the limiting bar tensions the copper bar so that the copper bar can elastically abut against the inner side of the bending section, a deformation space for expansion caused by heat and contraction caused by cold is reserved, and the insulation partition plate is prevented from being excessively extruded.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of resistors, in particular to a laminated resistor convenient to manufacture. BACKGROUND

[0002] The resistor generally includes multiple parallel resistance sheets. Under the action of a large current, the two adjacent resistance sheets are prone to attract each other. To prevent the resistance sheets from attracting each other, the prior art opens a coaxial hole on each resistance sheet, and a mica string rod and a mica ring are added to separate the adjacent resistance sheets. That is, the mica string rod passes through one resistance sheet, then passes through a mica ring, and then passes through the next resistance sheet. In this way, the adjacent resistance sheets are separated by the mica ring.

[0003] However, the resistance sheets of the previous chip resistor are exposed, and the dust and dirt prevention level is low. Due to insulation requirements, there must be a gap between the adjacent resistance sheets, and the resistance sheets inevitably have displacement space in the arrangement direction. When a large current passes through, the resistance sheets will heat and deform, and even attract each other to varying degrees, affecting stability and insulation performance.

[0004] The inventor later developed a sandwiched resistor disclosed in Chinese patent document with publication number CN114334314B, which includes a support module and a resistance unit. The resistance unit includes multiple resistance sheets and multiple insulating separation sheets arranged in sequence and spaced apart. A transition hole is opened at the position close to the end of the insulating separation sheet. The end of the resistance sheet is integrally formed with a curved section. The curved section passes through the transition hole and is connected to another resistance sheet, so that the multiple resistance sheets are electrically connected. The two side surfaces of each resistance sheet are tightly covered by different insulating separation sheets, so that dust and impurities are basically not deposited on the surface of the resistance sheet, and the dust and dirt prevention level is high. The resistance sheet has no deformation space in the arrangement direction, so the resistance sheet does not deform after being powered on, and different resistance sheets do not move closer to each other. Therefore, the structure is stable, and the insulation performance is good.

[0005] The prior art opens a hole in the insulating separation plate for the resistance sheet to pass through, so segmented resistance sheets must be used. The end of the resistance sheet is bent in advance and then passes through the hole of the mica plate to be connected to another resistance sheet. The non-continuous structure of the resistance sheet affects the current, especially at the position where different resistance sheets are connected. Moreover, each resistance sheet needs to be welded to fix the next resistance sheet, which has certain manufacturing difficulty and production efficiency needs to be improved. Furthermore, the curved section of the resistance strip tightly opens the side wall of the hole. The metal has the property of thermal expansion and cold contraction. The sandwiched resistor of the prior art has no space for the resistance strip to deform, and the extrusion force on the upper and lower layers of the mica plate is too large, which easily causes the mica plate to crack. SUMMARY

[0006] In view of all or part of the above technical problems existing in the prior art, the present application provides a laminated resistor convenient to manufacture.

[0007] To achieve the above object, the present application provides the following technical solutions: The present application provides a laminated resistor convenient to manufacture, which comprises a resistance strip made of metal material and insulating separation plates, the resistance strip is in an integral long strip structure, the resistance strip is continuously bent back and forth to form a plurality of resistance sections in parallel with each other, a plurality of insulating separation plates are embedded between adjacent two resistance sections, and the resistance sections are attached to the side surfaces of the insulating separation plates. The end of the insulating separation plate is provided with an open-type accommodation slot, the accommodation slot is provided with an insulating compensation block, so as to block the opening of the accommodation slot; a deformation space is left between the compensation block and the bottom of the accommodation slot, the bending section between the adjacent two resistance sections passes through the deformation space, and a distance is reserved between the bending section and the end surface of the compensation block and between the bending section and the bottom of the accommodation slot; a copper strip is arranged on the inner side of the bending section, the compensation block is provided with an elastic limiting strip, the limiting strip pulls the copper strip, so that the copper strip elastically abuts against the inner side of the bending section. The two ends of the resistance strip are connected with lead-out terminals which pass out of the insulating separation plates. The laminated resistor further comprises a locking assembly for pressing the plurality of insulating separation plates and the resistance sections.

[0008] Specifically, one side of the copper strip is provided with a first arc-shaped groove, and the bending section of the resistance strip is in an M shape and is embedded in the first arc-shaped groove of the copper strip.

[0009] Specifically, the other side of the copper strip is provided with a second arc-shaped groove, the limiting strip is integrally stamped and formed with an arc-shaped arching portion, and the arching portion is embedded in the second arc-shaped groove.

[0010] Specifically, only one end of the insulating separation plate is provided with the accommodation slot, and the accommodation slots of the adjacent two insulating separation plates are alternately arranged left and right.

[0011] Specifically, the opposite two side walls of the accommodation slot are recessed to form limiting grooves, the side portion of the compensation block is formed with limiting protrusions embedded in the limiting grooves, so as to prevent the compensation block from transversely separating from the insulating separation plate; the two ends of the limiting strip are bent and embedded in the limiting grooves, and the bending portion surrounds the two ends and one side surface of the copper strip, and the limiting strip has elasticity by virtue of the bending shape thereof.

[0012] Specifically, the thickness of the compensation block is equal to the thickness of the insulating separation plate plus twice the thickness of the resistance strip, and the thickness of the copper strip is equal to the thickness of the insulating separation plate.

[0013] Specifically, the lead-out terminal is in a sheet shape, which is attached to the end surfaces of the first and last resistance sections and partially extends out of the insulating separation plate.

[0014] Specifically, the base is made of metal, and the top surface of the base is provided with a lower insulating support plate, and the resistance band and the insulating partition plate are located above the lower insulating support plate; the top plate is also made of metal, and the bottom of the top plate is further provided with an upper insulating support plate, and the upper insulating support plate presses down the lead-out terminal or the insulating partition plate.

[0015] Specifically, the locking assembly includes a string rod and a nut, and the side of the insulating partition plate is provided with a positioning groove, and after the string rod passes through the positioning grooves of the top plate, the upper insulating support plate, the plurality of insulating partition plates, the lower insulating support plate and the base, the nut is tightened.

[0016] Specifically, the insulating partition plate and the compensation block are both mica pieces.

[0017] The beneficial effects of the present application are as follows: Compared with the prior art, the two side surfaces of the plurality of resistance segments are tightly covered by different insulating partition plates, so that dust and impurities basically cannot fall on the surface of the resistance sheet, and the dustproof and antifouling level is high. The resistance segments have no deformation space in the arrangement direction and cannot be close to each other, while there is a deformation space at the bending position of the resistance band, and the resistance segments can be extended and shortened, that is, there is a thermal expansion and cold contraction deformation space, so that the insulating partition plate is avoided from being excessively pressed. The resistance band maintains an integral structure, and the process of welding the connection every time in the prior art is omitted, and the production efficiency is improved. The copper strip helps to improve the current carrying capacity of the bending position of the resistance band. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the following drawings.

[0019] Figure 1 It is a structure schematic view of one kind of easy-to-manufacture laminated resistance in the embodiment.

[0020] Figure 2 It is a sectional view of one kind of easy-to-manufacture laminated resistance in the embodiment, and the longitudinal section.

[0021] Figure 3 It is a structure schematic view of Figure 2

[0022] Figure 4 It is a structure schematic view of one kind of easy-to-manufacture laminated resistance in the embodiment, and the upper part of the structure is hidden.

[0023] ​Figure 5 A cross-sectional view of a layered resistor convenient to manufacture in the embodiment.

[0024] Figure 6 A schematic view of the cooperation of the insulating partition plate, the compensation block, the copper strip and the limiting strip in the embodiment.

[0025] Reference signs: resistor band 1, resistor segment 11, curved segment 12; insulating partition plate 2, accommodation slot 21, limiting slot 22, positioning slot 23; compensation block 3, limiting protrusion 31; lead terminal 4; base 5, lower insulating support plate 6, top plate 7, upper insulating support plate 8; locking assembly 9.

[0026] deformation space 10, copper strip 101, first arc-shaped slot 1011, second arc-shaped slot 1012, limiting strip 102, arch portion 1021 DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] A layered resistor convenient to manufacture in the embodiment includes a metal resistor band 1 and a plurality of insulating partition plates 2, as shown in the figure. Figures 1 to 6 The resistor band 1 is of an integral long strip structure, and the resistor band 1 is continuously and reciprocally bent to form a plurality of parallel resistor segments 11, and the positions of the two ends of the resistor band 1 are longitudinally aligned.

[0029] The plurality of insulating partition plates 2 are embedded between the adjacent two resistor segments 11, and the resistor segments 11 are attached to the side surfaces of the insulating partition plates 2.

[0030] The end portion of the insulating partition plate 2 is provided with an open accommodation slot 21, and the accommodation slot 21 is provided with an insulating compensation block 3 to block the opening of the accommodation slot 21. A deformation space 10 is left between the compensation block 3 and the slot bottom of the accommodation slot 21, the curved segment 12 between the adjacent two resistor segments 11 passes through the deformation space 10, and a distance is kept between the curved segment 12 and the end surface of the compensation block 3 and between the curved segment 12 and the slot bottom of the accommodation slot 21, so that the curved segment 12 can move left and right. A copper strip 101 is arranged on the inner side of the curved segment 12, the compensation block 3 is provided with a limiting strip 102 having elasticity, the limiting strip 102 pulls the copper strip 101 to make the copper strip 101 elastically abut against the inner side of the curved segment 12, so that even if the curved segment 12 moves due to the thermal elongation of the resistor segment 11, the copper strip 101 keeps abutting against the inner wall of the curved segment 12.

[0031] The one side of the copper strip 101 is provided with a first arc-shaped slot 1011, and the bending section 12 of the resistance band 1 is in M shape and is embedded into the first arc-shaped slot 1011 of the copper strip 101. The other side of the copper strip 101 is provided with a second arc-shaped slot 1012, which is convenient for positioning when assembled and is also beneficial to the thermal deformation stretching of the bending section 12. The limiting strip 102 is integrally formed with an arc-shaped arch portion 1021, and the arch portion 1021 is embedded into the second arc-shaped slot 1012.

[0032] The two ends of the resistance band 1 are connected with the lead-out terminals 4 which are led out of the insulating partition plates 2.

[0033] Specifically, the insulating partition plates 2 and the compensation blocks 3 are mica pieces.

[0034] Specifically, the insulating partition plates 2 are provided with the accommodation slots 21 at only one end, and the accommodation slots 21 of adjacent two insulating partition plates 2 are alternately arranged left and right.

[0035] Specifically, the two side walls of the accommodation slot 21 are recessed to form a limiting slot 22, and the side portion of the compensation block 3 is formed with a limiting protrusion 31 embedded into the limiting slot 22, so as to prevent the compensation block 3 from transversely separating from the insulating partition plate 2, that is, the compensation block 3 can only be embedded into the accommodation slot 21 from top to bottom. The two ends of the limiting strip 102 are bent and embedded into the limiting slot 22, and the bending surrounds the two end faces and one side face of the copper strip 101. The limiting strip 102 has elasticity by virtue of the bending shape, and the bending position can be arranged in arc shape, so that the elasticity is more obvious.

[0036] Specifically, the thickness of the compensation block 3 is equal to the thickness of the insulating partition plate 2 plus twice the thickness of the resistance band 1, which is just fitted in the thickness direction, and the thickness of the copper strip 101 is equal to the thickness of the insulating partition plate 2.

[0037] Specifically, the lead-out terminal 4 is in sheet shape, which is fitted to the end faces of the resistance sections of the first and last sections and partially extends out of the insulating partition plate 2.

[0038] Specifically, it further includes a base 5 made of metal, and the top surface of the base 5 is provided with a lower insulating support plate 6, and the resistance band 1 and the insulating partition plate 2 are located above the lower insulating support plate 6.

[0039] Specifically, it further includes a top plate 7 made of metal, and the bottom of the top plate 7 is further provided with an upper insulating support plate 8, and the upper insulating support plate 8 presses down the lead-out terminal 4 or the insulating partition plate 2.

[0040] Specifically, locking assembly 9 is further included to press the multiple insulation partition plates 2. The locking assembly 9 includes a string rod (in the form of a bolt in the figure) and a nut (not shown in the figure), the side of the insulation partition plate 2 is provided with a positioning groove 23, the string rod passes through the top plate 7, the upper insulation support plate 8, the positioning groove 23 of the multiple insulation partition plates 2, the lower insulation support plate 6 and the base 5, and then the nut is tightened. Specifically, multiple sets of locking assemblies 9 are distributed circumferentially around the insulation partition plate 2, and the compensation block 3 is also provided with the positioning groove 23 and the locking assembly 9. Overall locking is achieved.

[0041] When assembled: The lower insulation support plate 6 is placed on the base 5, the first insulation partition plate 2 is placed on the lower insulation support plate 6, then a lead terminal 4 is placed, the resistance band 1 is laid on the lead terminal 4, then the second insulation partition plate 2 is placed, the resistance band 1 is laid on the top surface of the second insulation partition plate 2 by bypassing the accommodation groove 21 of the second insulation partition plate 2, then a compensation block 3 is embedded to block the opening of the accommodation groove 21, and the copper strip 101 and the limiting strip 102 are assembled; then the third insulation partition plate 2 is placed, and the bending of the entire resistance band 1 is completed in this order. In this way, every two adjacent resistance sections of the resistance band 1 are laid on the upper and lower surfaces of the insulation partition plate 2, the bending position bypasses the accommodation groove 21, and the opening of the accommodation groove 21 is blocked by the compensation block 3, so that the resistance band 1 is protected. Then another lead terminal 4 is laid on the last resistance section of the resistance band 1, then the upper insulation support plate 8 and the top plate 7 are laid, and finally the string rod is locked with the nut, which completes the assembly.

[0042] In practice, the first insulation partition plate 2 can be omitted, and the lead terminal 4 is directly placed on the lower insulation support plate 6.

[0043] In the description of the application, it is obvious that the described embodiments are only part of the embodiments of the application, not all. The components of the embodiments of the application described and shown in the drawings can be arranged and designed in various different configurations.

[0044] Therefore, the above detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the application. Based on the embodiments of the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0045] In the description of the application, it should be noted that the terms "middle", "upper", "lower", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. It can be mechanically connected or electrically connected. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

Claims

1. A multilayer resistor that is easy to manufacture, characterized in that: It includes a metal resistor strip and an insulating separator. The resistor strip is an integral long strip structure. The resistor strip is continuously bent back and forth to form multiple parallel resistor segments. Multiple insulating separators are embedded between two adjacent resistor segments, and the resistor segments are attached to the sides of the insulating separators. The end of the insulating partition plate is provided with an open relief groove, and the relief groove is provided with an insulating compensation block to seal the opening of the relief groove; a deformation space is left between the compensation block and the bottom of the relief groove, and the bending section between two adjacent resistor sections passes through the deformation space, and a distance is maintained between the end face of the bending section and the compensation block, and between the bending section and the bottom of the relief groove; a copper strip is provided on the inner side of the bending section, and the compensation block is provided with an elastic limiting strip, which pulls the copper strip tight so that the copper strip elastically abuts against the inner side of the bending section; The two ends of the resistor strip are connected to lead-out terminals that extend beyond the insulating partition plate; It also includes a locking assembly to press together multiple insulating partitions and resistor sections.

2. The easily manufactured multilayer resistor according to claim 1, characterized in that: A first arc-shaped groove is provided on one side of the copper strip, and the bent section of the resistor strip is M-shaped and is embedded in the first arc-shaped groove of the copper strip.

3. A multilayer resistor that is easy to manufacture according to claim 2, characterized in that: The other side of the copper strip is provided with a second arc-shaped groove, and the limiting strip is integrally stamped with an arc-shaped arched part, which is embedded in the second arc-shaped groove.

4. A multilayer resistor that is easy to manufacture according to claim 1, characterized in that: The insulating partition plate has the aforementioned clearance groove at only one end, and the clearance grooves of two adjacent insulating partition plates are arranged alternately on the left and right.

5. A multilayer resistor that is easy to manufacture according to claim 1, characterized in that: The opposing side walls of the relief groove are recessed to form a limiting groove. The side of the compensation block is formed with a limiting protrusion embedded in the limiting groove to prevent the compensation block from detaching laterally from the insulating partition plate. The two ends of the limiting strip are bent and embedded in the limiting groove, and the bend surrounds the two ends of the copper strip and one side. The limiting strip is elastic due to its own bending shape.

6. A multilayer resistor that is easy to manufacture according to claim 1, characterized in that: The thickness of the compensation block is equal to the thickness of the insulating partition plate plus twice the thickness of the resistance band, and the thickness of the copper strip is equal to the thickness of the insulating partition plate.

7. A multilayer resistor that is easy to manufacture according to claim 1, characterized in that: The lead-out terminals are in the form of plates, which are attached to the end faces of the resistor sections at the beginning and end and extend partially beyond the insulating partition plate.

8. A multilayer resistor that is easy to manufacture according to claim 1, characterized in that: It also includes a metal base with a lower insulating support plate on the top surface of the base, and the resistor strip and insulating partition plate are located on the lower insulating support plate; it also includes a metal top plate with an upper insulating support plate at the bottom, and the upper insulating support plate presses down on the lead-out terminal or insulating partition plate.

9. A multilayer resistor that is easy to manufacture according to claim 8, characterized in that: The locking assembly includes a rod and a nut. The side of the insulating partition plate has a positioning groove. After the rod passes through the top plate, the upper insulating support plate, the positioning grooves of multiple insulating partition plates, the lower insulating support plate and the base, the nut is tightened.

10. A multilayer resistor that is easy to manufacture according to claim 1, characterized in that: Both the insulating separator and the compensation block are made of mica.

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