A shock-resistant adjustable resistor

Abstract

The present application relates to the technical field of resistance, in particular to a kind of adjustable resistance of impact resistance, including support component and resistance component, support component includes insulated support matrix, support matrix is distributed with multiple support arms around circumference, support arm is provided with multiple positioning slots arranged in the inside and outside separation;Resistance component includes multiple resistance sheets, the two sides of multiple resistance sheets are embedded in the positioning slot of adjacent two support arms, and multiple resistance sheets between adjacent two support arms are arranged in the inside and outside separation;The middle part of each resistance sheet is provided with separation groove, separation groove is blind slot only through the end of resistance sheet, and resistance sheet is divided into first current-limiting part, series part and second current-limiting part, series part is located at the bottom of blind slot to connect first current-limiting part and second current-limiting part;First current-limiting part and second current-limiting part are respectively connected with lead-out terminal.Compared with prior art, it is convenient to install and disassemble.Moreover, resistance value of each resistance sheet can be adjusted arbitrarily according to the need to access current loop, and it is convenient to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of resistance, in particular to a shock-resistant adjustable resistor. BACKGROUND

[0002] At present, the forms of resistance sheet assemblies used for high-power resistors are various, especially in the field of high-power, high-energy, and low-resistance resistors, different cracks are directly punched on stainless steel resistance plates to form loops, which are directly used as resistance sheet assemblies. The tail of the crack of the resistance sheet forms a sharp angle, which is poor in resisting large current impact, cannot continuously pass through the load, and has unreliable performance. Since the crack is directly punched on the resistance sheet to form a through-flow loop, the tail of the crack forms a sharp angle, and after passing through a large current, the current is easily concentrated, the resistance sheet is directly burned out, and the resistor is scrapped.

[0003] Then the overall strip resistance appeared, but the existing resistance strip is difficult to deform after installation, cannot be adjusted according to the use environment, and the flexibility needs to be improved.

[0004] Then the inventor developed a shock-resistant adjustable resistor disclosed in Chinese document with publication number CN115831506A, which includes an upper seat and a lower seat, a plurality of support rods are vertically arranged between the upper seat and the lower seat, a plurality of longitudinally separated resistance strip groups are arranged along the length direction of the support rods, each resistance strip group includes a plurality of resistance strips arranged transversely from inside to outside, each resistance strip is in a closed loop curved shape, so that the resistance strip forms a plurality of inner concave parts and outer arch parts in sequence; the support rods are provided with a plurality of clamping grooves, the inner concave parts and the outer arch parts of the resistance strips are respectively embedded in different clamping grooves; the support rods corresponding to the outer arch parts can move in the inner-outer direction under the action of external force, and when in use, the support rods of the outer arch parts can be applied with a large enough force according to the use environment, such as space requirement, temperature, wind direction, etc., so that the stressed support rods drive the corresponding outer arch parts to arch more greatly, and after the external force is removed, the strength of the resistance strip is enough to maintain the adjusted shape, so the adaptability and flexibility are stronger.

[0005] However, the existing special-shaped strip resistance is relatively complex to install, and there is a need to simplify and improve the installation structure. SUMMARY

[0006] In view of all or part of the above technical problems existing in the prior art, the present application provides a shock-resistant adjustable resistor.

[0007] To achieve the above purpose, the present application provides the following technical solutions:

[0008] The application provides a shock-resistant adjustable resistor, which comprises a supporting assembly and a resistor assembly.

[0009] The resistor assembly comprises a plurality of wave-shaped resistor sheets, the two side portions of the resistor sheets are embedded in the positioning grooves of the two adjacent supporting arms, and the resistor sheets between the two adjacent supporting arms are arranged in a separated manner; a separation groove is formed in the middle portion of each resistor sheet, the separation groove is a blind groove only penetrating one end of the resistor sheet, so that the resistor sheet is divided into a first current limiting portion, a series connection portion and a second current limiting portion, the series connection portion is located at the bottom of the blind groove, so as to connect the first current limiting portion and the second current limiting portion; the first current limiting portion and the second current limiting portion are respectively connected with lead-out terminals, so that each resistor sheet forms a current loop of the lead-out terminal-the first current limiting portion-the series connection portion-the second current limiting portion-another lead-out terminal.

[0010] The lead-out terminal comprises a sliding contact head made of metal and a lead-out rod, the sliding contact head abuts against the side wall of the first current limiting portion / second current limiting portion, one end of the lead-out rod is connected with the sliding contact head, and the other end of the lead-out rod extends out of the resistor sheet; an external force can pull the lead-out rod to change the position of the sliding contact head, so as to change the length of the first current limiting portion and the second current limiting portion connected to the current loop.

[0011] Specifically, the supporting assembly further comprises a plurality of insulating positioning plates, the positioning plates are respectively located between the two supporting arms and pass through the separation groove of each resistor sheet.

[0012] Specifically, the supporting base is provided with a stop groove for embedding the positioning plate.

[0013] Specifically, the positioning plate is provided with a longitudinally arranged guide hole, and an insulating connecting rod is arranged between the sliding contact head corresponding to the first current limiting portion and the sliding contact head corresponding to the second current limiting portion of the same resistor sheet, so that the sliding contact heads corresponding to the first current limiting portion and the second current limiting portion are synchronously adjusted when the lead-out rod is pulled by an external force; the connecting rod is in interference fit through the guide hole, so that the sliding contact head and the lead-out rod stop at the adjusted position after the external force is removed.

[0014] Specifically, the side surface of the sliding contact head abutting against the resistor sheet is an arc-shaped surface.

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

[0016] Specifically, the supporting base is a ceramic piece in an integrated structure.

[0017] Specifically, the support assembly further comprises a first disc body, a second disc body and a screw rod, the first disc body and the second disc body are respectively located at two ends of the support base body and abut against two ends of the resistance sheet, the screw rod passes through the first disc body, the support base body and the second disc body, the screw rod is provided with a locking nut, so that the first disc body, the support base body and the second disc body are fixed to each other.

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

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

[0020] Specifically, the four support arms are uniformly arranged at an angle of 90°, and the side wall at the root intersection of the adjacent two support arms is arc-shaped and adapted to the resistance sheet.

[0021] The present application has the following beneficial effects:

[0022] The present application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

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

[0024] Figure 2 It is a schematic view of a shock-resistant adjustable resistor in the embodiment after hiding part of the support assembly.

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

[0026] Figure 4 It is a schematic view of a resistance sheet in the embodiment.

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

[0028] Figure 6 It is a schematic view of a lead-out terminal in the embodiment.

[0029] REFERENCE NUMERALS:

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

[0031] Resistor 2, separator 21, first current limiting part 22, series 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] First disc 51, second disc 52, screw 53, locking nut 54, clearance hole 55. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] This embodiment provides an adjustable resistor resistant to impact, such as... Figures 1 to 6 As shown, the assembly includes a support component and a resistor component. The support component includes an insulated support base 1, with four support arms 11 distributed circumferentially around the support base 1. The four support arms 11 are evenly spaced at 90° intervals. Each support arm 11 is provided with multiple positioning grooves 12 arranged with inner and outer separations, and each positioning groove 12 is arranged vertically in the longitudinal direction.

[0037] The resistor assembly includes multiple wavy, curved resistor sheets 2. The two sides of each resistor sheet 2 are embedded in the positioning grooves 12 of two adjacent support arms 11, and the resistor sheets 2 are arranged in a separated manner between adjacent support arms 11. During manufacturing, the resistor sheets 2 are first bent into the desired shape, and then the two sides of each resistor sheet 2 are directly embedded into the positioning grooves 12 of two adjacent support arms 11 of the support base 1, making installation and disassembly convenient.

[0038] Each resistor 2 has a dividing groove 21 in its middle. The dividing groove 21 is a blind groove that only penetrates the upper end of the resistor 2 and does not penetrate the lower end, thus dividing the resistor 2 into a first current-limiting part 22, a series part 23, and a second current-limiting part 24. The series part 23 is located at the bottom of the blind groove and connects the first current-limiting part 22 and the second current-limiting part 24. Each resistor 2 is an integral structure. The first current-limiting part 22 and the second current-limiting part 24 are respectively connected to lead-out terminals 3, thus forming a current loop of lead-out terminal 3-first current-limiting part 22-series part 23-second current-limiting part 24-another lead-out terminal 3.

[0039] Each of the lead terminals 3 comprises a metal slide contact 31 abutting against the side wall of the first current limiting portion 22 / second current limiting portion 24 and a lead rod 32 connected at one end to the slide contact 31 and extending at the other end out of the resistance sheet 3; an external force can pull the lead rod 32 to change the position of the slide contact 31, thereby changing the length of the first current limiting portion 22 and the second current limiting portion 24 connected to the current loop.

[0040] In use, the current passes through the lead terminals 3, the first current limiting portion 22, the series portion 23, the second current limiting portion 24 and the other lead terminal 3 in turn, which is convenient to use. In practice, each resistance sheet 2 can be used independently, and the lead terminals 3 corresponding to each resistance sheet 2 can be connected in series or parallel.

[0041] Specifically, the support assembly further comprises a plurality of insulating positioning plates 4, which are respectively located between each two support arms 11 and pass through the partition groove 21 of each resistance sheet 2, thereby enhancing the positioning of the resistance sheet 2 and separating the first current limiting portion 22 and the second current limiting portion 24.

[0042] Specifically, the support base 1 is provided with a stop groove 13 for embedding the positioning plate 4.

[0043] Specifically, the positioning plate 4 is provided with a longitudinally arranged guide hole 41, and an insulating connecting rod 33 is arranged between the slide contact 31 corresponding to the first current limiting portion 22 and the slide contact 31 corresponding to the second current limiting portion 24 of the same resistance sheet 2, so that the slide contact 31 and the lead rod 32 are adjusted synchronously when the lead rod 32 is pulled by an external force; the connecting rod 33 is fitted through the guide hole 41, so that the slide contact 31 and the lead rod 32 stop at the adjusted position after the external force is removed.

[0044] Specifically, the side of the slide contact 31 abutting against the resistance sheet 3 is an arc-shaped surface that is appropriately fitted, and the abutting area is larger.

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

[0046] Specifically, the support base 1 is a ceramic piece of an integrated structure.

[0047] Specifically, the support assembly further comprises a first disc body 51, a second disc body 52 and a screw rod 53, the first disc body 51 and the second disc body 52 are respectively located at the two end portions of the support base 1 and abut against the two ends of the resistance sheet 2, the screw rod 53 passes through the first disc body 51, the support base 1 and the second disc body 52, and the screw rod 53 is provided with a locking nut 54, thereby fixing the first disc body 51, the support base 1 and the second disc body 52 to each other.

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

[0049] Specifically, the two side portions of each resistance sheet 2 are straight sections, the resistance sheet 2 itself has certain bending elasticity, and the two side portions of the resistance sheet 2 elastically abut against the groove bottom of the positioning groove 12, thereby enhancing the stability of the resistance sheet 2 and preventing the resistance sheet 2 from shaking.

[0050] Specifically, the side wall at the root intersection of the two adjacent supporting arms 11 is arc-shaped and adapted to the resistance sheet 2.

[0051] In the description of the present application, it is obvious that the described embodiments are only part of the embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0052] Therefore, the above detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0053] In the description of the present 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 commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present 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.

[0054] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be broadly understood, 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, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A shock resistant adjustable resistor characterized by: The support assembly comprises an insulating support base (1) with a plurality of support arms (11) distributed in a circumferential direction, and the support arms (11) are provided with a plurality of positioning grooves (12) arranged in an inner-outer separation mode, and each positioning groove (12) is arranged in a longitudinal direction. The resistance assembly comprises a plurality of wave-shaped resistance sheets (2), the two side portions of the resistance sheets (2) are embedded in the positioning grooves (12) of the adjacent two support arms (11), and the resistance sheets (2) between the adjacent two support arms (11) are arranged in an inner-outer separation mode; the middle portion of each resistance sheet (2) is provided with a separation groove (21), the separation groove (21) is a blind groove only penetrating one end of the resistance sheet (2), so as to divide the resistance 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) is located at the bottom of the blind groove, so as to connect 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 with an outgoing terminal (3), so that each resistance sheet (2) forms a current loop of the outgoing terminal (3)-the first current-limiting portion (22)-the series connection portion (23)-the second current-limiting portion (24)-another outgoing terminal (3). The outgoing terminal (3) comprises a metal sliding contact (31) and an outgoing rod (32), the sliding contact (31) abuts against the side wall of the first current-limiting portion (22) and the second current-limiting portion (24) respectively, one end of the outgoing rod (32) is connected with the sliding contact (31), and the other end of the outgoing rod (32) extends out of the resistance sheet (2); an external force can pull the outgoing rod (32) to change the position of the sliding contact (31), so as to change the length of the first current-limiting portion (22) and the second current-limiting portion (24) connected to the current loop.

2. A shock resistant adjustable resistor according to claim 1, characterized in that: The support assembly further comprises a plurality of insulating positioning plates (4), the positioning plates (4) are respectively located between each two support arms (11) and pass through the separation groove (21) of each resistance sheet (2).

3. A shock resistant adjustable resistor according to claim 2, characterized in that: The support base (1) is provided with a stop groove (13) for embedding the positioning plate (4).

4. The shock resistant adjustable resistor of claim 2, wherein: The positioning plate (4) is provided with a longitudinally arranged guide hole (41), and an insulating connecting rod (33) is arranged between the sliding contact (31) corresponding to the first current-limiting portion (22) and the sliding contact (31) corresponding to the second current-limiting portion (24) of the same resistance sheet (2), so that the first current-limiting portion (22) and the second current-limiting portion (24) corresponding sliding contacts (31) are synchronously adjusted when the outgoing rod (32) is pulled by an external force; the connecting rod (33) is in interference fit through the guide hole (41), so that after the external force is removed, the sliding contact (31) and the outgoing rod (32) stop at the adjusted position.

5. The shock resistant adjustable resistor of claim 2, wherein: The side surface of the sliding contact (31) in contact with the resistance sheet (2) is an arc-shaped surface matched with the resistance sheet (2).

6. The shock resistant adjustable resistor of claim 1, wherein: The support base (1) is a ceramic piece in an integrated structure, and the positioning plate (4) is a mica plate.

7. The impact resistant adjustable resistor of claim 1, wherein: The support assembly further comprises a first disc body (51), a second disc body (52) and a screw rod (53), the first disc body (51) and the second disc body (52) are respectively located at two ends of the support base body (1) and abut against two ends of the resistance sheet (2), the screw rod (53) penetrates through the first disc body (51), the support base body (1) and the second disc body (52), the screw rod (53) is provided with a locking nut (54) so as to fix the first disc body (51), the support base body (1) and the second disc body (52) to each other.

8. A shock resistant adjustable resistor according to claim 7, characterized in that: The first disc body (51) and / or the second disc body (52) is provided with a plurality of accommodation holes (55), and the lead-out terminal (3) penetrates through the accommodation holes (55).

9. The shock resistant adjustable resistor of claim 1, wherein: The two side portions of each resistance sheet (2) are straight sections and elastically abut against the groove bottom of the positioning groove (12).

10. The impact resistant adjustable resistor of claim 1, wherein: The four support arms (11) are uniformly and evenly arranged at an angle of 90°, and the side wall at the root intersection of the two adjacent support arms (11) is arc-shaped and suitable for the resistance sheet (2).

Images