CN112750583B

CN112750583B - Aluminum-shell resistor

Info

Publication number: CN112750583B
Application number: CN202011623104.XA
Authority: CN
Inventors: 郁博翰; 郁静; 崔海滨; 陆玲
Original assignee: Anhui Laifu Electronic Technology Co ltd
Current assignee: Anhui Laifu Electronic Technology Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-04-15
Anticipated expiration: 2040-12-30
Also published as: CN112750583A

Abstract

The invention provides an aluminum-shell resistor which comprises an aluminum shell, wherein the aluminum shell is a hollow square tube, and a mica framework is arranged at the center inside the aluminum shell; alloy wires are wound on the outer side of the mica framework, welding caps are arranged at two ends of the mica framework, leading-out pieces are arranged on the outer sides of the two welding caps, end covers are arranged at two ends of the aluminum shell, and the leading-out pieces extend out of the end covers; and the alloy wire, the welding cap and the leading-out sheet are welded and fixed with each other. Can be when not using with the piece cladding of drawing forth at both ends to play protection and dirt-proof effect to drawing forth the piece, and accessible second pivot makes the piece of drawing forth expose again when using, and then can not influence the use, simultaneously, through first gear, draw forth the cooperation of results such as piece flank of tooth, first pinion rack, draw forth the length of drawing forth of piece and can carry out adaptability and adjust, satisfy and be suitable for, avoid longer exposed outside, avoid external impact to drawing forth the influence that the piece produced.

Description

Aluminum-shell resistor

Technical Field

The invention relates to the field of resistors, in particular to an aluminum-shell resistor.

Background

The aluminum shell resistor has the advantages that the shell is made of aluminum alloy (gold aluminum shell), the surface of the shell is provided with the heat dissipation grooves, the size is small, the power is high, the high temperature resistance is realized, the overload capacity is high, the weather resistance and the high precision are realized, the standard induction resistance is low, the stability is high, the framework is strong, the multiple combination selection with good flexibility is realized, the mechanical protection is facilitated, and the installation and the use are convenient.

The existing aluminum-shell resistor generally directly adopts quartz sand and a mica plate as insulating materials between a resistor core and an aluminum shell, has low strength, and is easy to damage the internal tightness after receiving impact during use, thereby influencing the use of the aluminum-shell resistor.

Disclosure of Invention

The present invention is directed to an aluminum-case resistor, which solves the above-mentioned problems of the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

an aluminum-case resistor includes an aluminum case; the aluminum shell is a hollow square tube, and a mica framework is arranged in the center of the interior of the aluminum shell; alloy wires are wound on the outer side of the mica framework, welding caps are arranged at two ends of the mica framework, leading-out pieces are arranged on the outer sides of the two welding caps, end covers are arranged at two ends of the aluminum shell, and the leading-out pieces extend out of the end covers; the alloy wire, the welding cap and the leading-out piece are welded and fixed with each other; the upper surface and the lower surface of the lead-out piece are tooth surfaces, a first gear is arranged on the tooth surfaces and meshed with the tooth surfaces of the lead-out piece, the first gear is connected in the aluminum shell through a first rotating shaft, two ends of the first rotating shaft are inserted into the front surface and the rear surface of the aluminum shell, two vertical frames are respectively arranged on the upper surface and the lower surface of the inner wall of the aluminum shell, each vertical frame is a U-shaped frame, the first gear is meshed with a first toothed plate, two through grooves are formed in the first toothed plate, the bottom of the U-shaped of each vertical frame penetrates through a channel to fix the first toothed plate in the aluminum shell, the through grooves of the first toothed plate are waist-shaped slotted holes, the first toothed plate moves along the waist-shaped slotted holes, the side wall of the first toothed plate between the two through grooves is connected with one of the vertical frames through a first spring, the upper surface and the lower surface of the aluminum shell penetrate through a second rotating shaft, the lead-out piece is provided with a first slotted hole, and the second rotating shaft penetrates through the first slotted hole, the second rotating shaft is provided with a cam, the cam is in end face contact with the first toothed plate, and the cam is externally connected with a power source to rotate.

The further technology of the invention is as follows:

preferably, the tooth surface of the first gear is a stepped surface, the middle of the first gear is low, the two sides of the first gear are high, the tooth surfaces of the two sides of the first gear are meshed with the tooth surface of the extraction plate, and the tooth surface of the middle of the first gear is meshed with the first toothed plate. The face of ladder provides the shift positioning for first pinion rack, and slippage takes off the tooth about first pinion rack can not appear moving the in-process.

Preferably, the cam is equipped with 3, and 3 cams are coaxial, and the minimum radius of every cam equals and the terminal surface flushes, and the maximum radius increases in proper order, second pivot top extends the aluminum hull upper surface, second pivot top is equipped with the bead, the bead overcoat has the sleeve pipe that has the ring channel, and the bead card is in the ring channel, the sleeve pipe both ends are equipped with horizontal support frame, the aluminum hull upper surface is equipped with fixed block and 3 groups support columns, horizontal support frame erects on the support column, be equipped with annular slide on the fixed block, be equipped with annular slider in the annular slide, be equipped with basket of flowers screw and be connected with annular slider on the horizontal support frame, 3 groups of support columns wind second pivot evenly distributed, and 3 groups of support column height inequality, and reduce in proper order, and adjacent the difference in height of support column equals the thickness of 1 cam, through the contact of changing the first pinion rack of the connection adjustment of horizontal support frame and 3 groups of support columns and 3 cams promptly.

Preferably, a second gear is arranged on the second rotating shaft, a moving plate is arranged in the aluminum shell, a second toothed plate is arranged on one side of the moving plate, the second toothed plate is meshed with the second gear, and a pressing rod is arranged on the other side of the moving plate.

Preferably, the thickness of the second gear is equal to the sum of the thicknesses of the 3 cams. When the lowest cam is contacted with the first toothed plate, the second toothed plate is meshed with the lowest part of the second gear, the initial meshing point of the second toothed plate and the second gear is arranged at the left end of the second toothed plate, at the moment, the longest radius of the cam is vertical to the moving plate, the second toothed plate drives the second toothed plate to rotate when the moving plate moves leftwards, the second gear is coaxial with the cam and drives the cam to rotate to provide rotating power for the cam, when the invention needs to be limited, the cam rotates 180 degrees when the meshing point of the second toothed plate and the second gear moves to the rightmost end, namely, the longest radius of the cam is contacted with the first toothed plate, the second toothed plate does not go back and forth once, the cam rotates for a circle, meanwhile, the thickness of the second gear is equal to the sum of the thicknesses of the 3 cams, in the above embodiment, the second rotating shaft is adjusted to control the different cams to contact with the first toothed plate, and the second toothed plate and the second gear are always in a meshed state.

Preferably, the aluminum hull both ends are equipped with control mechanism, control mechanism includes the box body, be equipped with the hole on the left end face of box body and the right-hand member face, be equipped with the depression bar in the box body, depression bar one end is passed the hole and is connected with the movable plate of box body left end face, continue to pass the end cover after the depression bar other end passes the hole of box body right-hand member face, the depression bar is the thick ladder pole in the thin right side in a left side, is equipped with the second spring on the depression bar between its ladder face and the box body right-hand member face.

Preferably, the box body is also internally provided with a rebound rod, the rebound rod has the same structure with the pressure rod, a gap is reserved between the left end of the rebound rod and the movable plate, the front end face of the box body is of a double-layer structure, the inner layer is an integral structure face with the box body, the outer layer is a sliding structure face, specifically, the left end face and the right end face of the box body are provided with slideways, two sides of the outer layer are clamped in the slideways, the width of the outer layer is smaller than that of the inner layer, the inner layer is provided with two parallel transverse holes, the inner layer is also provided with a slide rod, the outer layer is provided with a vertical slideway, two transverse slideways and a fixed rod, the slide rod passes through the vertical slideway, the top of the slide rod is connected with the top of the fixed rod through a third spring, the right inner wall of one transverse slideway is provided with a first deep groove, the groove wall is an inclined plane, the rebound rod is connected with a first movable rod, the first movable rod passes through the transverse hole of the inner layer and then is clamped in the first deep groove, wherein the left inner wall of another transverse slideway is provided with a second deep groove, the right inner wall is provided with a third deep groove, the wall of the third deep groove is an inclined plane, the compression bar is connected with a second movable rod, the second movable rod passes through the transverse hole of the inner layer and then is clamped in the third deep groove, and the inclined directions and the lengths of the inclined planes of the first deep groove and the third deep groove are the same.

Preferably, a plurality of radiating grooves are formed in the outer side of the aluminum shell.

Preferably, the top surface of the aluminum shell is provided with a label slot.

Compared with the prior art, the invention has the beneficial effects that:

can be when not using with the piece cladding of drawing forth at both ends to play protection and dirt-proof effect to drawing forth the piece, and accessible second pivot makes the piece of drawing forth expose again when using, and then can not influence the use, simultaneously, through first gear, draw forth the cooperation of results such as piece flank of tooth, first pinion rack, draw forth the length of drawing forth of piece and can carry out adaptability and adjust, satisfy and be suitable for, avoid longer exposed outside, avoid external impact to drawing forth the influence that the piece produced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an overall perspective view of the present invention;

FIG. 2 is a schematic sectional front view of the present invention;

FIG. 3 is a schematic view of a first tab structure according to the present invention;

FIG. 4 is a schematic view of a first gear of the present invention;

fig. 5 is a schematic structural view of a first toothed plate of the present invention;

FIG. 6 is a schematic view of the connection between the second shaft and the cam and the second gear according to the present invention;

FIG. 7 is a schematic top view of a second rotating shaft according to the present invention;

FIG. 8 is a front view of the cassette of the present invention;

FIG. 9 is an exploded front view of the cassette of the present invention;

FIG. 10 is a schematic top sectional view of the cartridge of the present invention;

in the figure: 1. an aluminum shell; 2. a mica skeleton; 3. alloy wires; 4. leading out the sheet; 5. an end cap; 6. a first gear; 7. a first rotating shaft; 8. a vertical frame; 9. a through groove; 10. a first spring; 11. a first toothed plate; 12. a second rotating shaft; 13. a first long hole; 14. a cam; 15. a rib; 16. a sleeve; 17. a transverse support frame; 18. a fixed block; 19. a support pillar; 20. an annular chute; 21. an annular slider; 22. a turnbuckle; 23. a second gear; 24. moving the plate; 25. the second toothed plate 26, the pressure rod 27, the box body 28, the second spring 29 and the rebound rod; 30. an inner layer; 31. an outer layer; 32. a transverse bore; 33. a slide bar; 34. a vertical slideway; 35. a transverse slideway; 36. fixing the rod; 37. a third spring; 38. a first deep trench; 39. a first movable bar; 40. a second deep groove; 41. a third deep groove; 42. a second movable bar; 43. a heat sink; 44. and a label slot.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The invention provides a technical scheme that: an impact-resistant aluminum-case 1 resistor includes an aluminum case 1; the aluminum shell 1 is a hollow square tube, and a mica framework 2 is arranged in the center of the interior of the aluminum shell 1; alloy wires 3 are wound on the outer side of the mica framework 2, welding caps are arranged at two ends of the mica framework 2, leading-out pieces 4 are arranged on the outer sides of the two welding caps, end covers 5 are arranged at two ends of the aluminum shell 1, and the leading-out pieces 4 extend out of the end covers 5; the alloy wire 3, the welding cap and the leading-out piece 4 are welded and fixed with each other; the upper surface and the lower surface of the lead-out piece 4 are tooth surfaces, a first gear 6 is arranged on the tooth surfaces, the first gear 6 is meshed with the tooth surfaces of the lead-out piece 4, the first gear 6 is connected in the aluminum shell 1 through a first rotating shaft 7, two ends of the first rotating shaft 7 are inserted on the front surface and the rear surface of the aluminum shell 1, two vertical frames 8 are respectively arranged on the upper surface and the lower surface of the inner wall of the aluminum shell 1, the vertical frames 8 are U-shaped frames, the first gear 6 is meshed with a first toothed plate 11, two through grooves 9 are arranged on the first toothed plate 11, the bottom of the U-shaped of each vertical frame 8 penetrates through a channel to fix the first toothed plate 11 in the aluminum shell 1, the through grooves 9 of the first toothed plate 11 are waist-shaped slotted holes, the first toothed plate 11 moves along the waist-shaped slotted holes, the side wall of the first toothed plate 11 between the two through grooves 9 is connected with one of the vertical frames 8 through a first spring 10, one end of the first toothed plate 11 is provided with teeth, second pivot 12 is run through to the lower extreme about aluminum hull 1, it is equipped with first slot hole 13 to draw forth piece 4, first slot hole 13 is passed in second pivot 12, be equipped with cam 14 in the second pivot 12, cam 14 and the 11 end face contact of first pinion rack, the external power supply of cam 14 rotates.

Preferably, the tooth surface of the first gear 6 is a stepped surface, the middle of the first gear is low, the two sides of the first gear are high, the tooth surfaces of the two sides of the first gear are meshed with the tooth surface of the extraction plate, and the tooth surface of the middle of the first gear is meshed with the first toothed plate 11. The face of ladder provides the shift positioning for first pinion rack 11, and slippage takes off the tooth about first pinion rack 11 can not appear moving the in-process.

The left and right structures of the resistor are mirror image structures, the left side is taken as an example in the embodiment, the lead-out sheet 4 is in a contracted state, the end part of the lead-out sheet 4 is tightly attached to the end cover 5, the tooth surface of the resistor lead-out sheet 4 is arranged on the upper and lower surfaces of the left side of the lead-out sheet 4, the starting point of the first gear 6 is positioned at the right end of the tooth surface, the lower part of the left end of the first toothed plate 11 is meshed with the first gear 6, the vertical frame 8 is positioned at the left side of the waist-shaped slotted hole, the first toothed plate 11 can move rightwards, one end of the first spring 10 is connected to the first toothed plate 11, the other end of the first spring is connected to the right vertical frame 8 (the first toothed plate 11 is pulled back by the first spring 10 after the first toothed plate 11 moves rightwards), the first toothed plate 11 is pushed to move rightwards by utilizing the rotation of the second rotating shaft 12 to drive the longest radius of the cam 14 structure to drive the first gear 6 to rotate rightwards, the first gear 6 rotates anticlockwise to drive the lead-out sheet 4 to extend outwards, normal use, rotate second pivot 12 and continue to rotate, the shortest radius department that drives cam 14 structure contacts with first pinion rack 11, utilize first spring 10 to pull back first pinion rack 11, it retrieves to drive draws forth piece 4, the length of drawing forth the first slot hole 13 of piece 4 is the same with the distance that first pinion rack 11 removed, it is poor all that cam 14 is the shortest and the longest radius, require to guarantee promptly to draw forth the in-process that piece 4 removed, second pivot 12 does not influence its round trip movement, can be when not using with the 4 cladding of drawing forth of both ends, thereby play protection and dirt-proof effect to drawing forth piece 4, and accessible second pivot 12 makes when using again and draws forth piece 4 and expose, and then can not influence the use.

The number of the cams 14 is 3, the cams 14 are coaxial, the shortest radius of each cam 14 is equal, the end face of each cam 14 is flush, the longest radius of each cam 14 is increased in sequence, the top of the second rotating shaft 12 extends out of the upper surface of the aluminum shell 1, the top of the second rotating shaft 12 is provided with a convex rib 15, a sleeve 16 with an annular groove is sleeved outside each convex rib 15, each convex rib 15 is clamped in the annular groove, the two ends of each sleeve 16 are provided with transverse supporting frames 17, the upper surface of the aluminum shell 1 is provided with fixing blocks 18 and 3 groups of supporting columns 19, each transverse supporting frame 17 is erected on each supporting column 19, each fixing block 18 is provided with an annular slide 20, each annular slide 20 is internally provided with an annular slide 21, each transverse supporting frame 17 is provided with a turnbuckle 22 connected with each annular slide 21, the 3 groups of supporting columns 19 are uniformly distributed around the second rotating shaft 12, the heights of the 3 groups of supporting columns 19 are different and are sequentially reduced, the height difference between the adjacent supporting columns 19 is equal to the thickness of 1 cam 14, that is, the contact between the first tooth plate 11 and 3 cams 14 is adjusted by changing the connection between the transverse supporting frame 17 and 3 groups of supporting columns 19.

In the invention, the heights of 3 groups of supporting columns 19 are sequentially reduced, the height difference between adjacent supporting columns 19 is equal to the thickness of 1 cam 14, when the transverse supporting frame 17 is erected on the highest supporting column 19, the height of the second rotating shaft 12 extending to the aluminum shell 1 is the highest, at this time, the lowest group of cams 14 in the 3 groups of cams 14 in the aluminum shell 1 is in contact with the first toothed plate 11, the shortest radius of each cam 14 is equal and the end surface is flush, the longest radius is sequentially increased (from top to bottom), the longest radius of the lowest group of cams 14 is the longest, the moving distance of the pushed first toothed plate 11 is the largest, the shortest radius of each cam 14 is equal and the end surface is flush, and the setting is that on one hand, no matter which cam 14 is in contact with the first toothed plate 11, the starting point of the first toothed plate is the same, namely, the starting point of the leading-out piece 4 is the same and is wrapped in the aluminum shell 1, on the other hand, the end surfaces of the cams 14 are flush, in the process that the second rotating shaft 12 moves up and down, the first toothed plate 11 can be directly contacted with the cams 14 without blocking, when the transverse support frame 17 is erected on the lowest support column 19, the height of the second rotating shaft 12 extending to the aluminum shell 1 is lowest, at this time, the highest group of cams 14 in 3 groups of cams 14 in the aluminum shell 1 is contacted with the first toothed plate 11, the longest radius of the highest group of cams 14 is the most end, the moving distance of the first toothed plate 11 in jacking movement is the shortest, and the moving distance of the first toothed plate 11 determines the extending distance of the leading-out piece 4, so that the leading-out piece 4 is protected as far as possible under the condition that the leading-out length of the leading-out piece 4 is adjusted to meet the use requirement, and the transverse support frame 17 is connected with the support column 19 and is adjusted by the turnbuckle 22 and then fastened.

The second rotating shaft 12 is provided with a second gear 23, a moving plate 24 is arranged in the aluminum shell 1, one side of the moving plate 24 is provided with a second toothed plate 25, the second toothed plate 25 is meshed with the second gear 23, and the other side of the moving plate 24 is provided with a pressing rod 26.

The thickness of the second gear 23 is equal to the sum of the thicknesses of the 3 cams 14. When the lowest cam 14 is in contact with the first toothed plate 11, the second toothed plate 25 is meshed with the lowest part of the second gear 23, the initial meshing point of the second toothed plate 25 and the second gear 23 is at the left end of the second toothed plate 25, at this time, the longest radius of the cam 14 is perpendicular to the moving plate 24, when the moving plate 24 moves leftwards, the second toothed plate 25 drives the second gear 23 to rotate, the second gear 23 is coaxial with the cam 14, and the cam 14 is driven to rotate, so as to provide rotating power for the cam 14, when the invention needs to be limited, when the meshing point of the second toothed plate 25 and the second gear 23 moves rightmost, the cam 14 rotates 180 degrees, that is, the longest radius of the cam 14 is in contact with the first toothed plate 11, the second toothed plate 25 does not move back and forth once, the cam 14 rotates a circle, and meanwhile, the thickness of the second gear 23 is equal to the thickness added by 3 cams 14, in the above embodiment, the second rotating shaft 12 is adjusted, so as to control different cams 14 to be in contact with the first toothed plate 11, the second gear plate 25 and the second gear 23 are always in an engaged state.

Preferably, 1 both ends of aluminum hull are equipped with control mechanism, control mechanism includes box body 27, be equipped with the hole on the left end face of box body 27 and the right end face, be equipped with depression bar 26 in the box body 27, the hole that depression bar 26 one end passed box body 27 left end face is connected with movable plate 24, continue to pass end cover 5 after the depression bar 26 other end passes the hole of box body 27 right end face, depression bar 26 is the thick ladder pole in the thin right side in a left side, is equipped with second spring 28 on the depression bar 26 between its ladder face and the box body 27 right end face.

In the invention, under the state that the second spring 28 is not stressed, the right end of the compression bar 26 is flush with the outer wall of the end cover 5, so that the error touch is avoided. The right end of the pressing rod 26 is pressed to press the second spring 28, the moving plate 24 is pushed to move left by the pressing rod 26, the pressing rod 26 is loosened, the influence of the elastic force of the second spring 28 is collected, the pressing rod 26 rebounds to drive the moving plate 24 to move right, the structure is simple, and power is provided for the moving plate 24.

The box body 27 is also internally provided with a rebound rod 29, the rebound rod 29 has the same structure with the pressure lever 26, a gap is left between the left end of the rebound rod 29 and the movable plate 24, the front end face of the box body 27 is of a double-layer structure, the inner layer 30 is of an integral structure face with the box body 27, the outer layer 31 is of a sliding structure face, specifically, the left end face and the right end of the box body 27 are provided with slideways, two sides of the outer layer 31 are clamped in the slideways, the width of the outer layer 31 is smaller than that of the inner layer 30, the inner layer 30 is provided with two parallel transverse holes 32, the inner layer 30 is also provided with a slide bar 33, the outer layer 31 is provided with a vertical slideway 34, two transverse slideways 35 and a fixed rod 36, the slide bar 33 passes through the vertical slideway 34, the top of the slide bar 33 is connected with the top of the fixed rod 36 through a third spring 37, the right inner wall of one transverse slideway 35 is provided with a first deep groove 38, the groove 38 is an inclined surface, the rebound rod 29 is connected with a first movable rod 39, first movable rod 39 passes through transverse hole 32 of inlayer 30 and blocks in first deep groove 38 after, and wherein another transverse slideway 35 left inner wall is equipped with second deep groove 40, and the right inner wall is equipped with third deep groove 41, and third deep groove 41 cell wall is the inclined plane, be connected with second movable rod 42 on the depression bar 26, second movable rod 42 passes behind the transverse hole 32 of inlayer 30 and blocks in third deep groove 41, first deep groove 38 is the same with third deep groove 41 inclined plane incline direction and length.

Specifically, when the pressing rod 26 is pressed by a finger, the pressing rod 26 is pushed leftward, the second moving rod 42 on the pressing rod 26 moves in the transverse hole 32, and the inclined surface of the third deep groove 41 engaged with the second moving rod 42 exists, when the second moving rod 42 is pushed leftward, the structure of the outer layer 31 on the front end surface of the case 27 moves upward, at this time, the third spring 37 is stretched, and when the second moving rod 42 continues to be pushed leftward, the second moving rod 42 enters the range of the second deep groove 40 after passing through the third deep groove 41, and under the influence of the third spring 37, the second moving rod 42 enters the second deep groove 40 and then is caught in the second deep groove 40, so that the pressing process of the pressing rod 26 is completed, the finger presses the resilient rod 29, the resilient rod 29 is pushed leftward, the first moving rod 39 on the resilient rod 29 moves in the transverse hole 32, and the inclined surface of the first deep groove 38 engaged with the first moving rod 39 exists, and when the first moving rod 39 is pushed leftward, the outer layer 31 structure on the front end surface of the box body 27 moves upwards, at the same time, the third spring 37 is stretched, the first moving rod 39 continues to push leftwards, the first moving rod 39 enters the range of the transverse groove after passing through the first deep groove 38, the first moving rod 39 and the second moving rod 42 are actually parallel structures, the distance is fixed, after the first moving rod 39 pushes the outer layer 31 structure of the box body 27 upwards, the second moving rod 42 is separated from the second deep groove 40, due to the existence of the second spring 28, the compression rod 26 rebounds, the second moving rod 42 on the compression rod 26 is clamped in the third deep groove 41 again, the first moving rod 39 on the rebounding rod 29 is clamped in the first deep groove 38, and the rebounding of the compression rod 26 is completed.

A plurality of heat dissipation grooves 43 are formed in the outer side of the aluminum shell 1.

The top surface of the aluminum shell 1 is provided with a label slot 44.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An aluminum-case resistor, characterized in that: comprises an aluminum shell; the aluminum shell is a hollow square tube, and a mica framework is arranged in the center of the interior of the aluminum shell; alloy wires are wound on the outer side of the mica framework, welding caps are arranged at two ends of the mica framework, leading-out pieces are arranged on the outer sides of the two welding caps, end covers are arranged at two ends of the aluminum shell, and the leading-out pieces extend out of the end covers; the alloy wire, the welding cap and the leading-out piece are welded and fixed with each other; the upper surface and the lower surface of the lead-out sheet are tooth surfaces, a first gear is arranged on the tooth surfaces and meshed with the tooth surfaces of the lead-out sheet, the first gear is connected in the aluminum shell through a first rotating shaft, two ends of the first rotating shaft are inserted into the front surface and the rear surface of the aluminum shell, two vertical frames are respectively arranged on the upper surface and the lower surface of the inner wall of the aluminum shell and are U-shaped frames, the first gear is meshed with a first toothed plate, the tooth surface of the first gear is a stepped surface, the middle of the first toothed plate is low, the two sides of the first toothed plate are high, the tooth surfaces of the two sides of the first toothed plate are meshed with the tooth surface of the lead-out sheet, the tooth surface of the middle of the first toothed plate is low and is meshed with the first toothed plate, two through grooves are arranged on the first toothed plate, the bottom of the U-shaped of each vertical frame penetrates through the through grooves to fix the first toothed plate in the aluminum shell, the through grooves of the first toothed plate are waist-shaped slotted holes, the first toothed plate moves along the waist-shaped slotted holes, the side walls of the first toothed plate between the two through grooves are connected with one vertical frames through first springs, the aluminum shell upper and lower surfaces penetrate through a second rotating shaft, the lead-out piece is provided with a first long hole, the second rotating shaft penetrates through the first long hole, a cam is arranged on the second rotating shaft, the cam is in end face contact with the first toothed plate, and the cam is externally connected with a power source and rotates.

2. An aluminum-case resistor according to claim 1, wherein: the cams are provided with 3 coaxial cams, the shortest radius of each cam is equal, the end surfaces of the cams are flush, the longest radius of each cam is increased in sequence, the top of the second rotating shaft extends out of the upper surface of the aluminum shell, the top of the second rotating shaft is provided with a convex edge, a sleeve with an annular groove is sleeved outside the convex edge, the convex edge is clamped in the annular groove, two ends of the sleeve are provided with transverse supporting frames, the upper surface of the aluminum shell is provided with a fixed block and 3 groups of supporting columns, the transverse supporting frame is erected on the supporting column, the fixing block is provided with an annular slideway, an annular sliding block is arranged in the annular slideway, the transverse supporting frame is provided with turn buckle screws connected with the annular sliding block, the 3 groups of supporting columns are uniformly distributed around the second rotating shaft, and the heights of the 3 groups of supporting columns are different and are sequentially reduced, the height difference between the adjacent supporting columns is equal to the thickness of 1 cam, namely, the contact between the first toothed plate and the 3 cams is adjusted by changing the connection between the transverse supporting frame and the 3 groups of supporting columns.

3. An aluminum-case resistor according to claim 2, wherein: the resistor left and right structure is a mirror image structure, wherein in the structure of the right side, a second gear is arranged on the second rotating shaft, a moving plate is arranged in the aluminum shell, a second toothed plate is arranged on one side of the moving plate, the second toothed plate is meshed with the second gear, and a pressing rod is arranged on the other side of the moving plate.

4. An aluminum-case resistor according to claim 3, wherein: the thickness of second gear equals the thickness that 3 cams add, and when the lowest cam contacted with first pinion rack, second pinion rack and the mesh of second gear below, the initial meshing point of second pinion rack and second gear was at the left end of second pinion rack, and at this moment, the longest radius perpendicular to movable plate of cam, second pinion rack when the movable plate moved left, drove the second gear and rotated, and the second gear is coaxial with the cam, drove the cam and rotated, provides pivoted power for the cam.

5. An aluminum-case resistor according to claim 3, wherein: the aluminum shell both ends are equipped with control mechanism, control mechanism includes the box body, be equipped with the hole on the left end face of box body and the right-hand member face, be equipped with the depression bar in the box body, depression bar one end is passed the hole and is connected with the movable plate of box body left end face, continue to pass the end cover after the depression bar other end passes the hole of box body right-hand member face, the depression bar is the thick ladder pole in a thin right side in a left side, is equipped with the second spring on the depression bar between its ladder face and the box body right-hand member face.

6. An aluminum-case resistor according to claim 1, wherein: a plurality of radiating grooves are formed in the outer side of the aluminum shell.

7. An aluminum-case resistor according to claim 1, wherein: and a label groove is formed in the top surface of the aluminum shell.