Impact-resistant adjustable resistor

Abstract

The invention relates to the technical field of resistors, in particular to an impact-resistant adjustable resistor which comprises a supporting assembly and a resistor assembly, the supporting assembly comprises an insulated supporting base body, a plurality of supporting arms are distributed on the supporting base body in the circumferential direction, and each supporting arm is provided with a plurality of positioning grooves which are arranged at intervals inside and outside; the resistor assembly comprises a plurality of resistor discs, the two sides of each resistor disc are embedded into the positioning grooves of every two adjacent supporting arms, and the resistor discs between every two adjacent supporting arms are arranged in a spaced mode inside and outside. A separation groove is formed in the middle of each resistor disc and is a blind groove only penetrating through one end of the resistor disc, the resistor disc is divided into a first current limiting part, a series connection part and a second current limiting part, and the series connection part is located at the bottom of the blind groove so as to be connected with the first current limiting part and the second current limiting part; and the first current limiting part and the second current limiting part are respectively connected with leading-out terminals. Compared with the prior art, mounting and dismounting are convenient. And the resistance value of each resistor disc connected to a current loop can be randomly adjusted as required, so that the use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of resistors, and in particular to an impact-resistant and adjustable resistor. Background Art

[0002] At present, there are various forms of resistor chip components for high-power resistors. Especially for high-power, high-energy, and low-resistance resistors, different cracks are directly punched on the stainless steel resistor plate to form a loop, and it is directly used as a resistor chip component. This method forms sharp corners at the tail of the crack of the resistor chip, which has poor resistance to large current impact, cannot continuously pass the load, and has unreliable performance. Since cracks are directly punched on the resistor chip to form a current loop, the tail of the crack forms a sharp corner, and it is easy for current to accumulate after a large current passes through, and the resistor chip is directly burned, causing the resistor to be scrapped.

[0003] Then, integrated strip resistors appeared. However, once the existing resistor strips are installed, they are difficult to deform and cannot be adjusted according to the use environment. The flexibility needs to be improved urgently.

[0004] Then the inventor developed an impact-resistant adjustable resistor as disclosed in the Chinese document with publication number CN115831506A, comprising an upper seat and a lower seat, with multiple groups of support rods standing between the upper seat and the lower seat, and a longitudinally separated multi-layer resistor band group arranged along the length direction of the support rod, each layer of the resistor band group comprises a plurality of resistor strips arranged transversely separated from the inside to the outside, each resistor strip is in a closed loop curved shape, so that the resistor strip forms a plurality of inner concave parts and outer arch parts in sequence; the support rod is provided with a plurality of slots, and the inner concave parts and outer arch parts of the resistor strip are respectively embedded in different slots; the support rod corresponding to the outer arch part can move inward and outward directions under the action of external force, and when in use, a sufficiently large force can be applied to the support rod of the outer arch part according to the use environment conditions, such as space requirements, temperature, wind direction, etc., so that the stressed support rod drives the corresponding outer arch part to arch to a greater extent, and after the external force is released, the strength of the resistor strip is sufficient to maintain the adjusted shape, so it has stronger adaptability and flexibility.

[0005] However, the existing special-shaped belt resistors are relatively complicated to install, and there is a need to simplify and improve the installation structure. Summary of the invention

[0006] In view of all or part of the above-mentioned technical problems in the prior art, the present invention provides an impact-resistant adjustable resistor.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] Provided is an impact-resistant adjustable resistor, comprising a support assembly and a resistor assembly, wherein the support assembly comprises an insulating support base, wherein the support base is provided with a plurality of support arms distributed around the circumference, wherein the support arms are provided with a plurality of positioning grooves arranged in an inner and outer separation manner, wherein each positioning groove is arranged longitudinally;

[0009] The resistor assembly includes a plurality of resistor sheets bent in a wave shape, the two sides of the plurality of resistor sheets are embedded in the positioning grooves of two adjacent support arms, and the plurality of resistor sheets between the two adjacent support arms are arranged in a separated manner inside and outside; a separation groove is opened in the middle of each resistor sheet, and the separation groove is a blind groove that only penetrates one end of the resistor sheet, thereby dividing the resistor sheet into a first current limiting part, a series connection part, and a second current limiting part, and the series connection part is located at the bottom of the blind groove to connect the first current limiting part and the second current limiting part; the first current limiting part and the second current limiting part are respectively connected to lead terminals, so that each resistor sheet forms a current loop of lead terminal-first current limiting part-series connection part-second current limiting part-another lead terminal;

[0010] The lead-out terminal includes a sliding contact and a lead-out rod made of metal. The sliding contact is pressed against the side wall of the first current limiting part / the second current limiting part. One end of the lead-out rod is connected to the sliding contact, and the other end extends outside the resistor. External force can pull the lead-out rod to change the position of the sliding contact, thereby changing the length of the first current limiting part and the second current limiting part connected to the current loop.

[0011] Specifically, the support assembly further includes a plurality of insulating positioning plates, which are respectively located between two supporting arms and pass through the separation slots of the resistor sheets.

[0012] Specifically, the supporting base is provided with a stop groove for the positioning plate to be embedded in.

[0013] Specifically, the positioning plate is provided with a longitudinal guide hole, and an insulating connecting rod is provided between the sliding contact corresponding to the first current limiting part and the sliding contact corresponding to the second current limiting part of the same resistor, so that the sliding contacts corresponding to the first current limiting part and the second current limiting part can be synchronously adjusted when the lead-out rod is pulled by external force; the connecting rod passes through the guide hole with an interference fit, so that after the external force is removed, the sliding contact and the lead-out rod stop at the adjusted position.

[0014] Specifically, the side surface of the contact resistor sheet of the sliding contact is a fitting arc surface.

[0015] Specifically, the positioning plate is a mica plate.

[0016] Specifically, the supporting substrate is a ceramic component with an integrated structure.

[0017] Specifically, the support assembly also includes a first disk body, a second disk body and a screw rod. The first disk body and the second disk body are respectively located at the two ends of the supporting base and are pressed against the two ends of the resistor. The screw rod passes through the first disk body, the supporting base and the second disk body. The screw rod is passed through a locking nut, thereby fixing the first disk body, the supporting base and the second disk body to each other.

[0018] Specifically, the first disk body and / or the second disk body is provided with a plurality of clearance holes, and the lead terminals pass through the clearance holes.

[0019] Specifically, two side portions of each resistor sheet are straight sections and elastically press against the bottom of the positioning groove.

[0020] Specifically, the four support arms are evenly spaced apart and arranged at 90 degrees, and the side wall at the intersection of the roots of two adjacent support arms is an arc shape adapted to the resistor sheet.

[0021] Beneficial effects of the present invention:

[0022] The impact-resistant adjustable resistor of the present invention is manufactured by first forming a corresponding resistor sheet according to a preset shape, and then directly embedding the resistor sheet into the positioning grooves of two adjacent support arms of the support substrate. It has strong impact resistance and is easy to install and disassemble. When in use, the current passes through the lead terminal, the first current limiting part, the series connection part, the second current limiting part and another lead terminal in sequence, which is convenient to use. Moreover, the resistance value of each resistor sheet connected to the current loop can be arbitrarily adjusted according to needs, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of a shock-resistant adjustable resistor in an embodiment.

[0024] Figure 2 It is a schematic diagram of an impact-resistant adjustable resistor in an embodiment after hiding part of the supporting components.

[0025] Figure 3 It is a cross-sectional view of a shock-resistant adjustable resistor in an embodiment.

[0026] Figure 4 Schematic diagram of the resistor in the embodiment.

[0027] Figure 5 It is an exploded view of an impact-resistant adjustable resistor in an embodiment.

[0028] Figure 6 Schematic diagram of the lead-out terminals in the embodiment.

[0029] Reference numerals:

[0030] Support base 1, support arm 11, positioning groove 12, stop groove 13;

[0031] Resistor 2, separation slot 21, first current limiting part 22, series connection part 23, second current limiting part 24;

[0032] Lead-out terminal 3, sliding contact 31, lead-out rod 32, connecting rod 33;

[0033] Positioning plate 4, guide hole 41;

[0034] The first disk body 51 , the second disk body 52 , the screw rod 53 , the locking nut 54 , and the clearance hole 55 . DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0036] A shock-resistant adjustable resistor according to this embodiment, such as Figures 1 to 6 As shown, it includes a support assembly and a resistor assembly, the support assembly includes an insulating support base 1, and the support base 1 is circumferentially distributed with four support arms 11, and the four support arms 11 are evenly spaced and arranged at 90 degrees. The support arm 11 is provided with a plurality of positioning grooves 12 separated and arranged inside and outside, and each positioning groove 12 is arranged vertically in the longitudinal direction.

[0037] The resistor assembly includes a plurality of resistor sheets 2 bent in a wave shape, and both sides of the plurality of resistor sheets 2 are embedded in the positioning grooves 12 of two adjacent support arms 11, and the plurality of resistor sheets 2 between two adjacent support arms 11 are separated and displayed inside and outside. During manufacturing, the corresponding resistor sheet 2 is first bent and formed according to a preset shape, and then both sides of the resistor sheet 2 are directly embedded in the positioning grooves 12 of two adjacent support arms 11 of the support base 1, which is convenient for installation and removal.

[0038] A separation groove 21 is opened in the middle of each resistor sheet 2. The separation groove 21 is a blind groove that only penetrates the upper end of the resistor sheet 2, and does not penetrate the lower end, thereby dividing the resistor sheet 2 into a first current limiting portion 22, a series portion 23, and a second current limiting portion 24. The series portion 23 is located at the bottom of the blind groove to connect the first current limiting portion 22 and the second current limiting portion 24. Each resistor sheet 2 is an integrated structure. The first current limiting portion 22 and the second current limiting portion 24 are respectively connected to the lead terminal 3, so that each resistor sheet 2 forms a current loop of the lead terminal 3-first current limiting portion 22-series portion 23-second current limiting portion 24-another lead terminal 3.

[0039] Each lead-out terminal 3 includes a metal sliding contact 31 and a lead-out rod 32. The sliding contact 31 is pressed against the side wall of the first current limiting part 22 / the second current limiting part 24. One end of the lead-out rod 32 is connected to the sliding contact 31, and the other end extends outside the resistor 3. External force can pull the lead-out rod 32 to change the position of the sliding contact 31, thereby changing the length of the first current limiting part 22 and the second current limiting part 24 connected to the current loop.

[0040] When in use, the current sequentially passes through the lead terminal 3, the first current limiting part 22, the series connection part 23, the second current limiting part 24 and another lead terminal 3, which is convenient to use. In practice, each resistor 2 can be used independently, and the lead terminals 3 corresponding to each resistor 2 can be connected in series and in parallel for use.

[0041] Specifically, the support assembly also includes multiple insulating positioning plates 4, which are respectively located between two supporting arms 11 and pass through the separation grooves 21 of each resistor 2 to enhance the positioning of the resistor 2 and separate the first current limiting part 22 and the second current limiting part 24.

[0042] Specifically, the supporting base 1 is provided with a stop groove 13 for the positioning plate 4 to be embedded in.

[0043] Specifically, the positioning plate 4 is provided with a longitudinal guide hole 41, and an insulating connecting rod 33 is provided between the sliding contact 31 corresponding to the first current limiting part 22 and the sliding contact 31 corresponding to the second current limiting part 24 of the same resistor 2, so that the sliding contacts 31 corresponding to the first current limiting part 22 and the second current limiting part 24 can be synchronously adjusted when the lead-out rod 32 is pulled by an external force; the connecting rod 33 passes through the guide hole 41 with an interference fit, so that after the external force is removed, the sliding contact 31 and the lead-out rod 32 stop at the adjusted position.

[0044] Specifically, the side surface of the sliding contact 31 that contacts the resistor sheet 3 is a fitted arc surface, and the fitting area is larger.

[0045] Specifically, the positioning plate 4 is a mica plate.

[0046] Specifically, the supporting substrate 1 is a ceramic component with an integrated structure.

[0047] Specifically, the support assembly also includes a first disk body 51, a second disk body 52 and a screw 53. The first disk body 51 and the second disk body 52 are respectively located at the two ends of the supporting base 1 and pressed against the two ends of the resistor 2. The screw 53 passes through the first disk body 51, the supporting base 1 and the second disk body 52. ​​The screw 53 is passed through a locking nut 54, thereby fixing the first disk body 51, the supporting base 1 and the second disk body 52 to each other.

[0048] Specifically, the first disk body 51 and / or the second disk body 52 is provided with a plurality of clearance holes 55 , and the lead terminals 3 pass through the clearance holes 55 .

[0049] Specifically, the two sides of each resistor 2 are straight sections. The resistor 2 itself has a certain bending elasticity. The two sides of the resistor 2 elastically press against the bottom of the positioning groove 12 to enhance the stability of the resistor 2 and prevent the resistor 2 from shaking arbitrarily.

[0050] Specifically, the side wall at the intersection of the roots of two adjacent supporting arms 11 is in an arc shape adapted to the resistor sheet 2 .

[0051] In the description of the present invention, it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations.

[0052] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A shock-resistant adjustable resistor, characterized by: The invention comprises a support assembly and a resistor assembly, wherein the support assembly comprises an insulating support base (1), wherein the support base (1) is provided with a plurality of support arms (11) distributed around the circumference, wherein the support arms (11) are provided with a plurality of positioning grooves (12) arranged in a separated manner inside and outside, and each positioning groove (12) is arranged longitudinally; The resistor assembly comprises a plurality of resistor sheets (2) bent in a wave shape, the two sides of the plurality of resistor sheets (2) being embedded in the positioning grooves (12) of two adjacent support arms (11), and the plurality of resistor sheets (2) between the two adjacent support arms (11) being arranged in a separated manner inside and outside; a separation groove (21) is provided in the middle of each resistor sheet (2), the separation groove (21) being a blind groove that only penetrates one end of the resistor sheet (2), thereby dividing the resistor sheet (2) into a first current limiting portion (22), a series connection portion (23) and a second current limiting portion (24), the series connection portion (23) being located at the bottom of the blind groove, thereby connecting the first current limiting portion (22) and the second current limiting portion (24); the first current limiting portion (22) and the second current limiting portion (24) are respectively connected to lead terminals (3), thereby forming a current loop of lead terminal (3)-first current limiting portion (22)-series connection portion (23)-second current limiting portion (24)-another lead terminal (3) for each resistor sheet (2); The lead-out terminal (3) comprises a sliding contact (31) and a lead-out rod (32) made of a metal material. The sliding contact (31) is pressed against the side wall of the first current limiting portion (22) / the second current limiting portion (24). One end of the lead-out rod (32) is connected to the sliding contact (31), and the other end extends outside the resistor (3). External force can pull the lead-out rod (32) to change the position of the sliding contact (31), thereby changing the length of the current loop connected to the first current limiting portion (22) and the second current limiting portion (24).

2. The impact-resistant adjustable resistor according to claim 1 is characterized in that: The support assembly also includes a plurality of insulating positioning plates (4), which are respectively located between two supporting arms (11) and pass through the separation grooves (21) of the resistor sheets (2).

3. The impact-resistant adjustable resistor according to claim 2 is characterized in that: The supporting base (1) is provided with a stop groove (13) for the positioning plate (4) to be embedded.

4. The impact-resistant adjustable resistor according to claim 2 is characterized in that: The positioning plate (4) is provided with a longitudinal guide hole (41); an insulating connecting rod (33) is provided between the sliding contact (31) corresponding to the first current limiting part (22) and the sliding contact (31) corresponding to the second current limiting part (24) of the same resistor (3), so that when the lead-out rod (32) is pulled by an external force, the sliding contacts (31) corresponding to the first current limiting part (22) and the second current limiting part (24) are synchronously adjusted; the connecting rod (33) passes through the guide hole (41) in an interference fit, so that after the external force is removed, the sliding contact (31) and the lead-out rod (32) stop at the adjusted position.

5. The impact-resistant adjustable resistor according to claim 2 is characterized in that: The side surface of the contact resistor sheet (2) of the sliding contact (31) is a fitted arc surface.

6. The impact-resistant adjustable resistor according to claim 1, characterized in that: The supporting base (1) is a ceramic component with an integrated structure, and the positioning plate (4) is a mica plate.

7. The impact-resistant adjustable resistor according to claim 1 is characterized in that: The supporting assembly further comprises a first disk (51), a second disk (52) and a screw (53); the first disk (51) and the second disk (52) are respectively located at two ends of the supporting base (1) and pressed against two ends of the resistor (2); the screw (53) passes through the first disk (51), the supporting base (1) and the second disk (52); a locking nut (54) is passed through the screw (53), thereby fixing the first disk (51), the supporting base (1) and the second disk (52) to each other.

8. The impact-resistant adjustable resistor according to claim 7 is characterized in that: The first disk body (51) and / or the second disk body (52) are provided with a plurality of clearance holes (55), and the lead terminals (3) pass through the clearance holes (55).

9. The impact-resistant adjustable resistor according to claim 1, characterized in that: The two side portions of each resistor sheet (2) are straight sections and elastically press against the bottom of the positioning groove (12).

10. The impact-resistant adjustable resistor according to claim 1, characterized in that: The four support arms (11) are evenly spaced and arranged at 90 degrees, and the side wall at the intersection of the roots of two adjacent support arms (11) is an arc shape adapted to the resistor sheet (2).

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