Composite alloy resistor

Abstract

The utility model discloses a composite alloy resistor which comprises a resistor body and electrodes symmetrically arranged at the two ends of the resistor body, each electrode comprises a supporting part arranged at the inner end and a fixing part arranged at the outer end, and each supporting part extends upwards in an inclined mode from outside to inside and is detachably connected with the resistor body. The outer end of the supporting part is integrally connected with the inner end of the fixing part, a plurality of connecting insertion rods are arranged at the two ends of the resistor body, insertion grooves capable of being inserted into the connecting insertion rods are formed in the inner end of the supporting part, and the side faces of the connecting insertion rods are in contact connection with the inner walls of the insertion grooves. Compared with a traditional alloy resistor, the composite alloy resistor is improved in stability and heat dissipation performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to alloy resistance, and specifically relates to a composite alloy resistance. BACKGROUND

[0002] Alloy resistance is a resistor made of alloy material formed by high-temperature smelting and cooling of two or more metal elements, and the commonly used alloy materials include iron-chromium, manganese-copper, nickel-chromium alloy, etc. Although alloy resistance has a low temperature coefficient, for precision electrical appliances, it is still necessary to reduce the influence of temperature on the resistance value of alloy resistance, especially to reduce the influence of heat of alloy resistance itself on the resistance value.

[0003] Publication No. CN210271944U discloses a kind of alloy resistor of side edge inclined plane repair resistance, including alloy resistance body, electrode, the back of alloy resistance body is equipped with two concave cavities, make alloy resistance both sides thin, then the cross-sectional area of current passing through the part of thinning is small, resistance resistance value is large, heat spreads from the middle part of alloy resistance to the both sides of thinner alloy resistance, beneficial to product heat spreading to electrode and PCB board, heat spreads in time, it has the effect of protecting circuit for resistance product practical application.

[0004] The alloy resistor concentrates heat on both sides by thinning both sides, improving heat dissipation effect, but this way affects the structural strength of the alloy resistance body itself, resulting in that the overall stability of the alloy resistor still cannot meet the design requirements. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of composite alloy resistance, and the stability and heat dissipation of the composite alloy resistance are improved compared with traditional alloy resistance.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a kind of composite alloy resistance, including resistance body and electrode symmetrically arranged at both ends of the resistance body, the electrode includes support part arranged at inner end, and fixed part arranged at outer end, the support part extends obliquely upward from outside to inside and is detachably connected with the resistance body, the outer end of the support part is integrally connected with the inner end of the fixed part, both ends of the resistance body are provided with a plurality of connecting insertion rods, the inner end of the support part is provided with a slot capable of being inserted into the connecting insertion rod, and the side surface of the connecting insertion rod is in contact with the inner wall of the slot.

[0007] Preferably, the included angle α between the connecting insertion rod and the resistance body is 110°-170°, the support part is parallel to the connecting insertion rod, and the slot is parallel to the support part.

[0008] Preferably, a plurality of heat dissipation holes penetrating through both ends are arranged on the fixed part in the width direction.

[0009] Preferably, the heat dissipation hole is rectangular in cross section, and an insulating support rib is inserted and fixed in the heat dissipation hole; a plurality of heat dissipation gaps are arranged between the outer surface of the insulating support rib and the inner wall of the heat dissipation hole.

[0010] Preferably, the side surface of the insulating support rib is provided with a recess penetrating through both ends; the recess and the inner wall of the heat dissipation hole form the heat dissipation gap.

[0011] Preferably, the corner of the insulating support rib is chamfered; the chamfer and the corner of the heat dissipation hole form the heat dissipation gap.

[0012] Preferably, the insulating support rib is a ceramic rib.

[0013] Preferably, the resistor body is a manganese-copper-nickel alloy, a manganese-copper-tin alloy, an iron-chromium alloy or a nickel-chromium alloy.

[0014] Preferably, the electrode is a copper electrode.

[0015] Preferably, the upper side of the support part is provided with a screw hole communicating with the insertion slot, and a compression bolt is arranged in the screw hole.

[0016] According to the above technical scheme, the utility model provides a kind of composite alloy resistance, including resistor body and the electrode being symmetrically arranged in the both ends of the resistor body, the electrode includes the support part being arranged in inner end, and the fixed part being arranged in outer end, the support part is extended obliquely upwards from outside to inside and is detachably connected with the resistor body, the outer end of the support part is integrally connected with the inner end of the fixed part, the both ends of the resistor body are provided with a plurality of connection insertion rods, the inner end of the support part is provided with the insertion slot that can be inserted into the connection insertion rod, the side surface of the connection insertion rod and the inner wall of the insertion slot are contact connection.

[0017] The composite alloy resistor has the following beneficial effects: 1. By inserting the connecting plug rods at both ends of the resistor body into the insertion slots, the alignment operation during assembly is facilitated; 2. By arranging the connecting plug rods, the connection stability between the resistor body and the electrodes at both ends is increased; 3. By arranging a plurality of connecting plug rods, the contact area between the resistor body and the electrodes is increased, thereby increasing the heat conduction area and the heat diffusion effect of the resistor body, so that the influence of temperature change on the resistance value is reduced; 4. By arranging the inclined support parts, a heat dissipation space is formed at the bottom of the resistor body, facilitating heat dissipation; 5. Since the current flow cross section at the connecting plug rods is smaller than the flow cross section of the resistor body itself, the resistance value is increased, and the heat generation is mainly concentrated at the connecting plug rods, and the connecting plug rods are in direct contact with the electrodes, so that the heat can be quickly conducted out, thereby increasing the heat dissipation effect, compared with the method of thinning the alloy body on both sides, the structural strength of the alloy body itself is not affected, and the stability is better; 6. The composite alloy resistor adopts a detachable structure of the resistor body, facilitating replacement of resistor bodies of different resistance value specifications, thereby facilitating circuit board design and test use.

[0018] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0020] Figure 1 is a schematic view of the overall structure of a preferred embodiment of the composite alloy resistor;

[0021] Figure 2 is a schematic view of the overall structure of a preferred embodiment of the composite alloy resistor;

[0022] Figure 3 is a schematic view of the overall structure of a preferred embodiment of the composite alloy resistor; Figure 2

[0023] Figure 4 is an exploded view of a preferred embodiment of the composite alloy resistor;

[0024] Figure 5 is a schematic view of the structure of a preferred embodiment of the insulating support rib;

[0025] Figure 6 is a schematic view of the side structure of a preferred embodiment of the resistor body;

[0026] Figure 7 is a schematic view of the cross-sectional structure of a preferred embodiment of the composite alloy resistor.

[0027] EXPLANATION OF REFERENCE NUMERALS​

[0028] 1-resistor body; 2-fixing part; 3-supporting part; 4-insulating supporting rib; 5-heat dissipation gap; 6-connecting plug; 7-heat dissipation hole; 8-insert slot; 9-recess; 10-chamfer; 11-pressing bolt. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0030] In the present application, the orientation words such as "up and down, left and right, front and back, inside and outside" contained in the terms only represent the orientation of the terms in the normal use state or the common name understood by the person skilled in the art, and should not be regarded as a limitation of the terms.

[0031] Referring to Figures 1-7 The composite alloy resistor shown in the figure comprises a resistor body 1 and electrodes symmetrically arranged at both ends of the resistor body 1, the electrodes comprising a supporting part 3 arranged at the inner end and a fixing part 2 arranged at the outer end, the supporting part 3 extending obliquely upward from the outside to the inside and being detachably connected with the resistor body 1, the outer end of the supporting part 3 being integrally connected with the inner end of the fixing part 2, a plurality of connecting plugs 6 being arranged at both ends of the resistor body 1, an insert slot 8 being arranged at the inner end of the supporting part 3 and being capable of inserting the connecting plug 6, and the side surface of the connecting plug 6 being in contact connection with the inner wall of the insert slot 8.

[0032] Through the implementation of the above technical solution, the connecting plug 6 at both ends of the resistor body 1 is inserted into the insert slot 8, which facilitates the alignment operation during assembly; through the arrangement of the connecting plug 6, the connection stability between the resistor body 1 and the electrodes at both ends is increased; through the arrangement of the plurality of connecting plugs 6, the contact area between the resistor body 1 and the electrodes is increased, thereby increasing the heat conduction area and the heat diffusion effect of the resistor body 1, so as to reduce the influence of temperature change on the resistance value; through the arrangement of the inclined supporting part 3, a heat dissipation space is formed at the bottom of the resistor body 1, which facilitates heat dissipation. Since the current flow cross section at the connecting plug 6 is smaller than the current flow cross section of the resistor body 1 itself, the resistance value is increased, and the heat generation is mainly concentrated at the connecting plug 6, which is in direct contact with the electrode, so that the heat can be quickly conducted out, thereby increasing the heat dissipation effect. Compared with the method of thinning the alloy body 1 at both sides, the structural strength of the alloy body itself is not affected, and the stability is better. In addition, the composite alloy resistor adopts the detachable structure of the resistor body 1, which facilitates the replacement of resistor bodies 1 of different resistance value specifications, thereby facilitating the design and testing use of the circuit board.

[0033] In this embodiment, the included angle a between the connecting rod 6 and the resistance body 1 is 110°-170°; the support part 3 is parallel to the connecting rod 6, and the insertion slot 8 is parallel to the support part 3. The connecting rod 6, the support part 3 and the insertion slot 8 are all arranged in parallel, which facilitates the insertion of the connecting rod 6.

[0034] In this embodiment, a plurality of through holes 7 are arranged on the fixing part 2 in the width direction. Since part of the heat generated by the resistance body 1 is transferred to the electrode, the arrangement of the through holes 7 can accelerate the dissipation of the heat on the electrode to the air.

[0035] In this embodiment, the cross section of the through hole 7 is rectangular, and the insulating support rib 4 is inserted and fixed in the through hole 7; a plurality of heat dissipation gaps 5 are arranged between the outer surface of the insulating support rib 4 and the inner wall of the through hole 7. Due to the arrangement of the plurality of through holes 7, the structural strength of the fixing part 2 is weakened, and by inserting and fixing the insulating support rib 4 in the through hole 7, the structural strength is improved, and the heat can be transferred to the air through the plurality of heat dissipation gaps 5. The insulating support rib 4 and the wall of the through hole 7 can be fixed by epoxy resin at positions other than the heat dissipation gaps 5 to avoid slipping.

[0036] In this embodiment, the side surface of the insulating support rib 4 is provided with a recess 9 penetrating through both ends; the recess 9 and the inner wall of the through hole 7 form the heat dissipation gap 5.

[0037] For example, the recess 9 is arranged on the upper side and the lower side of the insulating support rib 4, so that the insulating support rib 4 is formed in a H-shaped structure as a whole.

[0038] In this embodiment, the corner of the insulating support rib 4 is provided with a chamfer 10; the chamfer 10 and the corner of the through hole 7 form the heat dissipation gap 5. By such an arrangement, the space between the chamfer 10 and the corner of the through hole 7 is used as the heat dissipation gap 5, which increases the heat dissipation area, and the chamfer 10 can be a round corner or a flat corner.

[0039] In this embodiment, as a preferred arrangement, the insulating support rib 4 is a ceramic rib. The ceramic rib can also be a honeycomb ceramic, which can reduce the weight and increase the heat dissipation effect.

[0040] In this embodiment, in order to further provide a resistance body 1, the resistance body 1 is made of manganese copper nickel alloy, manganese copper tin alloy, iron chromium alloy or nickel chromium alloy.

[0041] Of course, this is not a limitation on the resistance body 1. In addition to manganese copper nickel alloy, manganese copper tin alloy, iron chromium alloy or nickel chromium alloy, other alloys that can be used as resistance medium can also be used.

[0042] In this embodiment, the electrode is a copper electrode. Since copper material itself has good heat conduction performance, the electrode can adopt a copper electrode.

[0043] In this embodiment, the upper side of the support part 3 is provided with a screw hole communicating with the insertion slot 8, and a compression bolt 11 is arranged in the screw hole. Through such arrangement, the connecting plug rod 6 matched with the plug is compressed in the insertion slot 8 by the compression bolt 11, so that the connection is more firm.

[0044] The number of screw holes can be set as needed, for example, a plurality of screw holes are arranged along the width direction of the support part 3, each connecting plug rod 6 corresponds to a screw hole, and a compression bolt 11 is arranged corresponding to each screw hole.

[0045] The preferred embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the utility model within the technical concept of the utility model, and these simple modifications all belong to the protection scope of the utility model.

[0046] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the utility model will not further describe various possible combination manners.

[0047] In addition, various different embodiments of the utility model can also be combined in any manner, as long as it does not deviate from the technical concept of the utility model, and it should also be considered as the disclosed content of the utility model.

Claims

1. A composite alloy resistor, characterized in that, The composite alloy resistor includes a resistor body (1) and electrodes symmetrically arranged at both ends of the resistor body (1). The electrodes include a support part (3) at the inner end and a fixing part (2) at the outer end. The support part (3) extends obliquely upward from the outside to the inside and is detachably connected to the resistor body (1). The outer end of the support part (3) is integrally connected to the inner end of the fixing part (2). Both ends of the resistor body (1) are provided with a plurality of connecting rods (6). The inner end of the support part (3) is provided with a slot (8) into which the connecting rods (6) can be inserted. The side of the connecting rod (6) is in contact with the inner wall of the slot (8).

2. The composite alloy resistor according to claim 1, characterized in that, The included angle α between the connecting rod (6) and the resistor (1) is 110° to 170°; The support part (3) is parallel to the connecting rod (6), and the slot (8) is parallel to the support part (3).

3. The composite alloy resistor according to claim 1, characterized in that, The fixing part (2) is provided with a plurality of heat dissipation holes (7) that pass through both ends along the width direction.

4. The composite alloy resistor according to claim 3, characterized in that, The heat dissipation hole (7) has a rectangular cross-section, and an insulating support rib (4) is inserted and fixed inside the heat dissipation hole (7); Multiple heat dissipation gaps (5) are provided between the outer surface of the insulating support rib (4) and the inner wall of the heat dissipation hole (7).

5. The composite alloy resistor according to claim 4, characterized in that, The insulating support rib (4) has a recess (9) with two through ends on its side; The heat dissipation gap (5) is formed between the recess (9) and the inner wall of the heat dissipation hole (7).

6. The composite alloy resistor according to claim 4, characterized in that, The corner of the insulating support rib (4) is chamfered (10); The heat dissipation gap (5) is formed between the chamfer (10) and the corner of the heat dissipation hole (7).

7. The composite alloy resistor according to any one of claims 4-6, characterized in that, The insulating support bar (4) is a ceramic bar.

8. The composite alloy resistor according to claim 1, characterized in that, The resistor (1) is a manganese copper-nickel alloy, a manganese copper-tin alloy, an iron-chromium alloy, or a nickel-chromium alloy.

9. The composite alloy resistor according to claim 1, characterized in that, The electrode is a copper electrode.

10. The composite alloy resistor according to claim 1, characterized in that, The upper side of the support (3) is provided with a screw hole that communicates with the slot (8), and a clamping bolt (11) is provided in the screw hole.

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