CN113690005B

CN113690005B - High-precision wire-wound preset potentiometer

Info

Publication number: CN113690005B
Application number: CN202111251583.1A
Authority: CN
Inventors: 缪建国
Original assignee: Nantong Yudie Electronic Ceramic Co ltd
Current assignee: Nantong Yudie Electronic Ceramic Co ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2021-12-17
Anticipated expiration: 2041-10-27
Also published as: CN113690005A

Abstract

The invention belongs to the technical field of potentiometers, in particular to a high-precision wire-wound preset potentiometer, aiming at the problems that the conventional potentiometer can not be switched between quick adjustment and precise fine adjustment at will and is often instable when a lead is installed on the potentiometer, so that the electric conductivity is poor, the invention provides a scheme which comprises an outer cylinder, wherein the inner wall of the outer cylinder is connected with an inner cylinder in a sliding way, the top of the inner cylinder penetrates through the outer cylinder and extends to the upper part of the outer cylinder, two first springs which are symmetrically arranged are fixedly connected between the bottom of the inner cylinder and the inner wall of the bottom of the outer cylinder, and a first rotating rod penetrates through the top of the inner cylinder in a rotating way. Simultaneously, the installation and the maintenance are more convenient through the arrangement of the connecting component.

Description

High-precision wire-wound preset potentiometer

Technical Field

The invention belongs to the technical field of potentiometers, and relates to a high-precision wire-wound preset potentiometer.

Background

The potentiometer is a resistance element with three leading-out terminals and a resistance value adjustable according to a certain variation rule, and is generally composed of a resistor body and a movable brush, when the brush moves along the resistor body, a resistance value or a voltage in a certain relation with a displacement amount is obtained at an output terminal, the potentiometer can be used as a three-terminal element or a two-terminal element, and the potentiometer can be regarded as a variable resistor and is called as a potentiometer because the potentiometer has the function of obtaining an output voltage in a certain relation with an input voltage (an external voltage) in a circuit.

The potentiometre is very common electrical part, can all use the potentiometre in many electrical apparatus in the life, current potentiometre or can only carry out the snap-action voltage, the regulation precision is low, be difficult to control, or can only slowly adjust voltage, the regulation speed is slow, it is long consuming time, can not switch wantonly in snap-action and accurate fine setting, be difficult to satisfy user's demand, the potentiometre is when the installation wire simultaneously, often the installation appears insecure, lead to the poor condition of electric conductivity, so we provide a high accuracy wire-wound preset potentiometre, a problem for solving the aforesaid mentioning.

Disclosure of Invention

In view of the above, the invention provides a high-precision wire-wound preset potentiometer, which aims to solve the problems that a potentiometer used in the market can only adjust voltage quickly, has low adjustment precision and is difficult to control, or can only adjust voltage slowly, has slow adjustment speed and long time consumption, cannot switch between quick adjustment and precise fine adjustment at will and is difficult to meet the requirements of users, and meanwhile, when a wire is installed on the potentiometer, the potentiometer is often installed unstably, so that the conductivity is poor.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a wire-wound preset potentiometer of high accuracy, includes the urceolus, the inner wall sliding connection of urceolus has the inner tube, the top of inner tube runs through the urceolus and extends to the top of urceolus, two first springs that fixedly connected with symmetry set up between the bottom of inner tube and the bottom inner wall of urceolus, the top of inner tube is rotated and is run through and has been had first bull stick, the top fixedly connected with of first bull stick controls the handle, the outer wall of first bull stick is from last to fixed cover in proper order down and is equipped with first gear wheel, first middle gear and second pinion, the bottom inner wall of urceolus rotates and is connected with the second bull stick, the outer wall of second bull stick is from last to fixed cover in proper order down and is equipped with first pinion, second middle gear and second gear wheel, first gear wheel meshes with first pinion mutually, one side fixedly connected with rectangle case of urceolus, the inside of rectangle case is provided with and is used for carrying out spacing subassembly to the urceolus, the through-hole has been seted up at the top of inner tube, the inside of through-hole is provided with the control assembly that is used for relieving the braking of inner tube, the inside of urceolus is provided with arc porcelain section of thick bamboo, arc porcelain section of thick bamboo's outer wall is around being equipped with the resistance wire, one side of urceolus is fixed to run through has second wiring pipe and two first wiring pipes, second wiring pipe and two first wiring pipes are located the outside one end of urceolus fixedly connected with second terminal and first terminal respectively, two first wiring pipe respectively with the both ends electric connection of resistance wire, the fixed cover of outer wall of second bull stick is equipped with the drum, the one end of drum is provided with the adjusting part who is used for adjusting voltage, the inside of second wiring pipe is provided with the coupling assembling that is used for fixed connection line.

Preferably, spacing subassembly includes from last first cardboard, second cardboard and the third cardboard of sliding connection in proper order at rectangle case one side inner wall down, first cardboard, second cardboard and the third cardboard all run through rectangle case and urceolus near the one end of urceolus, the card hole of block mutually with first cardboard, second cardboard and third cardboard is seted up to one side of inner tube, first cardboard, second cardboard and third cardboard are located the equal fixedly connected with riser of the inside one end of rectangle case, and are three equal fixedly connected with second extension spring between one side of riser and the one side inner wall of rectangle case, and is three the second extension spring is established respectively on first cardboard, second cardboard and third cardboard for realize the limit function to the inner tube, and then make the inner tube fix at a certain height, make corresponding gear can keep the engaged state.

Preferably, the control assembly includes the push rod of sliding connection inside the through-hole, the inside that the through-hole and extend to the inner tube is run through to the bottom of push rod, two fixed plates that the outer wall fixedly connected with symmetry of push rod set up, two the first extension spring of equal fixedly connected with between the top of fixed plate and the top inner wall of inner tube, the top of push rod runs through-hole and fixedly connected with limiting plate for relieve the braking of inner tube, and then resume the device to initial position, control the convenience, be convenient for switch between accurate adjustment and quick adjustment.

Preferably, the adjusting part comprises a transverse plate fixedly connected to one side of the cylinder, one side of the cylinder is rotatably connected with a rotating plate, the top of the rotating plate and the bottom of the transverse plate are fixedly connected with a third tension spring, one end of the rotating plate is fixedly connected with a slip sheet which is inconsistent with the resistance wire, the slip sheet is electrically connected with a wire, one end of the wire penetrates through the second wiring tube and extends to the inside of the second wiring tube, and the slip sheet is used for adjusting voltage and can be ensured to be in close contact with the resistance wire.

Preferably, coupling assembling includes the last rectangular plate of fixed connection at second wire barrel top inner wall, go up the bottom of rectangular plate and seted up first mounting groove, the bottom inner wall screw thread of second wire barrel has run through the screw rod, the top of screw rod is rotated and is connected with down the rectangular plate, the second mounting groove has been seted up at the top of rectangular plate down, a plurality of electric connection pieces of inside fixedly connected with of second mounting groove, the second terminal passes through electric connection piece electric connection with the wire, the bottom of screw rod extends to under the second wire barrel and fixedly connected with carousel, is convenient for change the wire, can reduce the operation degree of difficulty when maintenance and installation, reduces operating time.

Preferably, the bottom one side of second cardboard and third cardboard all fixedly connected with arch, the second cardboard of being convenient for and third cardboard are withdrawed, the dead condition of card can not appear.

Preferably, one side of the rectangular box is hinged with a box door, one side of the box door is fixedly connected with a hasp, one side of the rectangular box is provided with a hook matched with the hasp for use, and the box door can be opened for control when the device cannot be restored to the initial position.

Preferably, the outer wall of the arc-shaped porcelain cylinder is provided with a spiral groove, the resistance wire is wound in the spiral groove, the stability of the resistance wire is guaranteed, and the resistance wire can not fall off or become loose.

Preferably, one side of the cylinder is fixedly connected with two symmetrically arranged side plates, one side of each side plate close to each other is rotatably connected with the same rotating shaft, and the rotating shaft fixedly penetrates through the rotating plate, so that the sliding plate can be in close contact with the resistance wire.

Preferably, the top fixedly connected with symmetry of lower rectangular plate sets up two slide bars, two spouts that the symmetry set up are seted up to the bottom of going up the rectangular plate, slide bar and spout sliding connection guarantee down the stability of rectangular plate and last rectangular plate.

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

1. the control handle is rotated to drive the first rotating rod to rotate, the first rotating rod drives the first big gear to rotate, the first big gear drives the first small gear to rotate, the first small gear drives the second rotating rod to rotate, the second rotating rod drives the cylinder to rotate, the cylinder drives the rotating plate to rotate, the rotating plate drives the sliding sheet to rotate, the third tension spring is arranged to enable the sliding sheet to be in close contact with the resistance wire all the time, the position of the sliding sheet is changed, and therefore the resistance value in an access circuit can be changed, and the function of changing voltage is achieved;

2. when voltage needs to be finely adjusted, the inner cylinder is vertically pressed downwards, the inner cylinder drives the first rotating rod and the push rod to vertically move downwards and extrude the first spring, the inner cylinder pushes the first clamping plate and enables the clamping hole to be clamped with the second clamping plate, the first large gear is not meshed with the first small gear at the moment, the first middle gear is meshed with the second middle gear, the size of the first middle gear is equivalent to that of the second middle gear at the moment, the accuracy of voltage adjustment is higher, when voltage adjustment with higher accuracy is needed, the inner cylinder is continuously pressed downwards vertically, the second small gear is meshed with the second large gear, the third clamping plate is clamped with the clamping hole, and the function of adjusting voltage with higher accuracy can be achieved;

3. when the inner cylinder needs to be reset, the limiting plate can be vertically pressed downwards, the limiting plate drives the push rod to vertically move downwards, the push rod drives the fixing plate to vertically move downwards and stretches the first tension spring, the push rod pushes the third clamping plate, the protrusion is located inside the clamping hole, at the moment, one side of the push rod blocks the clamping hole, the push rod and the inner cylinder are pulled upwards together, the device can be restored to the initial position, when the device is damaged and cannot be restored to the original position by the aid of the push rod, the box door is opened, the device can be restored to the initial position, and adjustment is convenient;

4. when the maintenance wire needs to be changed, the rotary table is rotated, and then the rotary table drives the vertical downward movement of screw rod, the vertical downward movement of rectangular plate under the screw rod drives, make down rectangular plate and last rectangular plate no longer press from both sides tight wire, after having changed new wire, reverse rotation carousel once more, make down rectangular plate and last rectangular plate laminating, and make the wire be located inside first mounting groove and the second mounting groove, a plurality of electric connection pieces insert inside the wire simultaneously, make the device contact inseparable, electric conductivity is better.

According to the invention, the function of changing voltage can be realized by rotating the control handle, the accuracy of adjusting voltage can be higher by vertically pressing the inner barrel downwards, the device can be restored to the initial position by pressing the limiting plate, when the device is damaged, the box door is opened, the device can be restored to the initial position, and meanwhile, the installation and the maintenance are more convenient by arranging the connecting component.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is an overall three-dimensional view of a high-precision wire-wound preset potentiometer according to the present invention;

FIG. 2 is a three-dimensional cross-sectional view of a high precision wire wound preset potentiometer in accordance with the present invention;

FIG. 3 is a front cross-sectional view of a high precision wire wound preset potentiometer in accordance with the present invention;

FIG. 4 is a three-dimensional cross-sectional view of the inner barrel of the present invention;

FIG. 5 is a three-dimensional view of a rectangular box of the present invention;

FIG. 6 is a three-dimensional cross-sectional view of a rectangular box of the present invention;

FIG. 7 is a three-dimensional view of the resistance wire and the arc-shaped porcelain cylinder of the present invention;

FIG. 8 is a three-dimensional view of an arc-shaped porcelain tube according to the present invention;

FIG. 9 is a three-dimensional view of a cylinder and slider of the present invention;

FIG. 10 is a three-dimensional cross-sectional view of a second wire barrel of the present invention;

fig. 11 is a three-dimensional view of an upper rectangular plate and a lower rectangular plate in the present invention.

In the figure: 1. a control handle; 2. a first rotating lever; 3. an inner barrel; 4. an outer cylinder; 5. a first junction tube; 6. a first terminal post; 7. a second terminal; 8. a second junction tube; 9. a hasp; 10. hooking; 11. a box door; 12. a rectangular box; 13. a through hole; 14. a push rod; 15. a limiting plate; 16. a first bull gear; 17. a first spring; 18. a resistance wire; 19. an arc-shaped porcelain cylinder; 20. a second bull gear; 21. a second rotating rod; 22. a first pinion gear; 23. a fixing plate; 24. a first clamping plate; 25. a first tension spring; 26. a first middle gear; 27. a second pinion gear; 28. a turntable; 29. a cylinder; 30. a second middle gear; 31. a third clamping plate; 32. a second clamping plate; 33. a clamping hole; 34. a protrusion; 35. a second tension spring; 36. a vertical plate; 37. a wire; 38. a transverse plate; 39. a third tension spring; 40. rotating the plate; 41. sliding blades; 42. a spiral groove; 43. a rotating shaft; 44. a side plate; 45. a slide bar; 46. a lower rectangular plate; 47. a screw; 48. an upper rectangular plate; 49. a chute; 50. a first mounting groove; 51. connecting a power strip; 52. and a second mounting groove.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Example one

Referring to fig. 1-11, a high-precision wire-wound preset potentiometer comprises an outer cylinder 4, an inner cylinder 3 is slidably connected to the inner wall of the outer cylinder 4, the top of the inner cylinder 3 penetrates through the outer cylinder 4 and extends to the upper side of the outer cylinder 4, two first springs 17 symmetrically arranged are fixedly connected between the bottom of the inner cylinder 3 and the inner wall of the bottom of the outer cylinder 4, a first rotating rod 2 is rotatably penetrated through the top of the inner cylinder 3, a control handle 1 is fixedly connected to the top of the first rotating rod 2, a first large gear 16, a first middle gear 26 and a second small gear 27 are fixedly sleeved on the outer wall of the first rotating rod 2 from top to bottom in sequence, a second rotating rod 21 is rotatably connected to the inner wall of the bottom of the outer cylinder 4, a first small gear 22, a second middle gear 30 and a second large gear 20 are fixedly sleeved on the outer wall of the second rotating rod 21 from top to bottom in sequence, the first large gear 16 is meshed with the first small gear 22, a rectangular box 12 is fixedly connected to one side of the outer cylinder 4, the inside of rectangle case 12 is provided with and is used for carrying out spacing subassembly to inner tube 3, through-hole 13 has been seted up at the top of inner tube 3, the inside of through-hole 13 is provided with the control assembly that is used for removing the braking of inner tube 3, the inside of urceolus 4 is provided with arc porcelain section of thick bamboo 19, arc porcelain section of thick bamboo 19's outer wall is around being equipped with resistance wire 18, one side of urceolus 4 is fixed to run through has second junction tube 8 and two first junction tubes 5, second junction tube 8 and two first junction tubes 5 are located urceolus 4 outside one end fixedly connected with second terminal 7 and first terminal 6 respectively, two first junction tubes 5 respectively with the both ends electric connection of resistance wire 18, the outer wall fixed cover of second bull stick 21 is equipped with drum 29, the one end of drum 29 is provided with the adjusting part who is used for adjusting voltage, the inside of second junction tube 8 is provided with the coupling assembling that is used for fixed connection line.

Example two

Referring to fig. 1-11, a high-precision wire-wound preset potentiometer comprises an outer cylinder 4, an inner cylinder 3 is slidably connected to the inner wall of the outer cylinder 4, the top of the inner cylinder 3 penetrates through the outer cylinder 4 and extends to the upper side of the outer cylinder 4, two first springs 17 symmetrically arranged are fixedly connected between the bottom of the inner cylinder 3 and the inner wall of the bottom of the outer cylinder 4, a first rotating rod 2 is rotatably penetrated through the top of the inner cylinder 3, a control handle 1 is fixedly connected to the top of the first rotating rod 2, a first large gear 16, a first middle gear 26 and a second small gear 27 are fixedly sleeved on the outer wall of the first rotating rod 2 from top to bottom in sequence, a second rotating rod 21 is rotatably connected to the inner wall of the bottom of the outer cylinder 4, a first small gear 22, a second middle gear 30 and a second large gear 20 are fixedly sleeved on the outer wall of the second rotating rod 21 from top to bottom in sequence, the first large gear 16 is meshed with the first small gear 22, a rectangular box 12 is fixedly connected to one side of the outer cylinder 4, the limiting component for limiting the inner cylinder 3 is arranged in the rectangular box 12 and comprises a first clamping plate 24, a second clamping plate 32 and a third clamping plate 31 which are sequentially connected to the inner wall of one side of the rectangular box 12 in a sliding manner from top to bottom, one ends of the first clamping plate 24, the second clamping plate 32 and the third clamping plate 31, which are close to the outer barrel 4, penetrate through the rectangular box 12 and the outer barrel 4, one side of the inner cylinder 3 is provided with clamping holes 33 which are clamped with the first clamping plate 24, the second clamping plate 32 and the third clamping plate 31, one ends of the first clamping plate 24, the second clamping plate 32 and the third clamping plate 31, which are positioned in the rectangular box 12, are fixedly connected with a vertical plate 36, second tension springs 35 are fixedly connected between one sides of the three vertical plates 36 and the inner wall of one side of the rectangular box 12, and the three second tension springs 35 are respectively sleeved on the first clamping plate 24, the second clamping plate 32 and the third clamping plate 31 for limiting the inner cylinder 3, so that the inner cylinder 3 can be fixed at a certain height, and the corresponding gear can keep a meshing state;

the top of the inner cylinder 3 is provided with a through hole 13, a control component for releasing the brake of the inner cylinder 3 is arranged in the through hole 13, the control component comprises a push rod 14 which is slidably connected in the through hole 13, the bottom of the push rod 14 penetrates through the through hole 13 and extends into the inner cylinder 3, the outer wall of the push rod 14 is fixedly connected with two fixing plates 23 which are symmetrically arranged, a first tension spring 25 is fixedly connected between the tops of the two fixing plates 23 and the inner wall of the top of the inner cylinder 3, the top of the push rod 14 penetrates through the through hole 13 and is fixedly connected with a limiting plate 15 for releasing the brake of the inner cylinder 3, and then the device is restored to the initial position, the control is convenient, and the switching between accurate adjustment and quick adjustment is facilitated;

an arc-shaped porcelain cylinder 19 is arranged inside the outer cylinder 4, a resistance wire 18 is wound on the outer wall of the arc-shaped porcelain cylinder 19, a second wiring pipe 8 and two first wiring pipes 5 are fixedly penetrated through one side of the outer cylinder 4, the second wiring pipe 8 and one ends of the two first wiring pipes 5, which are positioned outside the outer cylinder 4, are respectively and fixedly connected with a second binding post 7 and a first binding post 6, the two first wiring pipes 5 are respectively and electrically connected with two ends of the resistance wire 18, a cylinder 29 is fixedly sleeved on the outer wall of the second rotating rod 21, one end of the cylinder 29 is provided with an adjusting component for adjusting voltage, the adjusting component comprises a transverse plate 38 fixedly connected with one side of the cylinder 29, one side of the cylinder 29 is rotatably connected with a rotating plate 40, the same third tension spring 39 is fixedly connected between the top of the rotating plate 40 and the bottom of the transverse plate 38, one end of the rotating plate 40 is fixedly connected with a sliding sheet 41 which is in contact with the resistance wire 18, and the sliding sheet 41 is electrically connected with a lead wire 37, one end of the lead wire 37 penetrates through the second wire connecting tube 8 and extends into the second wire connecting tube 8 for regulating voltage, and the slide sheet 41 can be ensured to be in close contact with the resistance wire 18;

the connecting assembly for fixing the connecting wire is arranged inside the second wiring pipe 8 and comprises an upper rectangular plate 48 fixedly connected to the inner wall of the top of the second wiring pipe 8, a first mounting groove 50 is formed in the bottom of the upper rectangular plate 48, a screw rod 47 penetrates through the inner wall of the bottom of the second wiring pipe 8 in a threaded manner, the top of the screw rod 47 is rotatably connected with a lower rectangular plate 46, a second mounting groove 52 is formed in the top of the lower rectangular plate 46, a plurality of electric connection pieces 51 are fixedly connected inside the second mounting groove 52, the second wiring terminal 7 is electrically connected with the wire 37 through the electric connection pieces 51, the bottom of the screw rod 47 extends to the position under the second wiring pipe 8 and is fixedly connected with a turntable 28, the wire 37 is convenient to replace, the operation difficulty can be reduced during maintenance and installation, and the working time can be reduced;

one side of the bottom of the second clamping plate 32 and one side of the bottom of the third clamping plate 31 are both fixedly connected with a protrusion 34, the second clamping plate 32 and the third clamping plate 31 can be conveniently withdrawn, the situation of clamping can not occur, one side of the rectangular box 12 is hinged with a box door 11, one side of the box door 11 is fixedly connected with a hasp 9, one side of the rectangular box 12 is provided with a hook 10 matched with the hasp 9 for use, when the device can not be recovered to the initial position, the box door 11 can be opened for control, the outer wall of the arc-shaped porcelain cylinder 19 is provided with a spiral groove 42, the resistance wire 18 is wound in the spiral groove 42, the stability of the resistance wire 18 is ensured, further the situation that the resistance wire 18 falls off and loosens can not occur, one side of the cylinder 29 is fixedly connected with two symmetrically arranged side plates 44, one side of the two side plates 44 close to each other is rotatably connected with a same rotating shaft 43, the rotating shaft 43 fixedly penetrates through the rotating plate 40, so that the sliding plate 41 can be in close contact with the resistance wire 18, the top of lower rectangular plate 46 is fixedly connected with two slide bars 45 that the symmetry set up, and two chutes 49 that the symmetry set up are seted up to the bottom of last rectangular plate 48, and slide bar 45 and chute 49 sliding connection guarantee lower rectangular plate 46 and the stability of last rectangular plate 48.

The working principle is as follows: when the voltage regulator is used, the control handle 1 is rotated, the control handle 1 drives the first rotating rod 2 to rotate, the first rotating rod 2 drives the first big gear 16 to rotate, the first big gear 16 drives the first small gear 22 to rotate, the first small gear 22 drives the second rotating rod 21 to rotate, the second rotating rod 21 drives the cylinder 29 to rotate, the cylinder 29 drives the rotating plate 40 to rotate, the rotating plate 40 drives the sliding sheet 41 to rotate, the sliding sheet 41 is always in close contact with the resistance wire 18 due to the arrangement of the third tension spring 39, the resistance value in an access circuit can be changed due to the change of the position of the sliding sheet 41, the function of changing voltage is realized, the radius of the first big gear 16 is larger than that of the first small gear 22, the function of quickly regulating voltage can be realized, when the voltage needs to be finely regulated, the inner cylinder 3 is vertically pressed downwards, the inner cylinder 3 drives the first rotating rod 2 and the push rod 14 to vertically downwards move and extrude the first spring 17, the inner cylinder 3 pushes the first clamping plate 24, the clamping hole 33 is clamped with the second clamping plate 32, the first large gear 16 is not meshed with the first small gear 22, the first middle gear 26 is meshed with the second middle gear 30, the size of the first middle gear 26 is equal to that of the second middle gear 30, the accuracy of voltage regulation is higher, when the voltage regulation with higher accuracy is needed, the inner cylinder 3 is continuously pressed downwards vertically, the second small gear 27 is meshed with the second large gear 20, the third clamping plate 31 is clamped with the clamping hole 33, the voltage regulation function with higher accuracy can be realized, when the inner cylinder 3 needs to be reset, the limiting plate 15 can be pressed downwards vertically, the limiting plate 15 drives the push rod 14 to move downwards vertically, the push rod 14 drives the fixing plate 23 to move downwards vertically and stretch the first tension spring 25, the push rod 14 pushes the third clamping plate 31, and enables the protrusion 34 to be located inside the clamping hole 33, at this moment, one side of the push rod 14 blocks the clamping hole 33, the push rod 14 and the inner cylinder 3 are pulled upwards together, and then the device can be restored to the initial position, when the device is damaged and cannot be restored to the original position by using the push rod 14, the box door 11 is opened, the device can also be restored to the initial position, the adjustment is convenient, when the maintenance wire 37 needs to be replaced, the rotary disc 28 is rotated, and then the rotary disc 28 drives the screw rod 47 to vertically move downwards, the screw rod 47 drives the lower rectangular plate 46 to vertically move downwards, so that the lower rectangular plate 46 and the upper rectangular plate 48 do not clamp the wire 37 any more, after the new wire 37 is replaced, the rotary disc 28 is reversely rotated again, so that the lower rectangular plate 46 is attached to the upper rectangular plate 48, and the wire 37 is located inside the first installation groove 50 and the second installation groove 52, and meanwhile, the plurality of electric connection pieces 51 are inserted inside the wire 37, so that the device is in tight contact and better in conductivity.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims

1. The utility model provides a wire-wound preset potentiometer of high accuracy, includes urceolus (4), its characterized in that, the inner wall sliding connection of urceolus (4) has inner tube (3), the top of inner tube (3) runs through urceolus (4) and extends to the top of urceolus (4), two first springs (17) that fixedly connected with symmetry set up between the bottom of inner tube (3) and the bottom inner wall of urceolus (4), the top of inner tube (3) is provided with the switching component who is used for switching voltage governing speed, the switching component is including rotating first bull stick (2) of running through at inner tube (3) top, the top fixedly connected with of first bull stick (2) controls handle (1), the outer wall of first bull stick (2) is from last to fixing the cover in proper order down and is equipped with first gear wheel (16), first idler gear (26) and second pinion (27), the bottom inner wall of the outer barrel (4) is rotatably connected with a second rotating rod (21), the outer wall of the second rotating rod (21) is fixedly sleeved with a first pinion (22), a second middle gear (30) and a second gearwheel (20) from top to bottom in sequence, the first gearwheel (16) is meshed with the first pinion (22), one side of the outer barrel (4) is fixedly connected with a rectangular box (12), a limiting component for limiting the inner barrel (3) is arranged inside the rectangular box (12), a through hole (13) is formed in the top of the inner barrel (3), a control component for releasing the brake of the inner barrel (3) is arranged inside the through hole (13), an arc-shaped porcelain barrel (19) is arranged inside the outer barrel (4), a resistance wire (18) is wound on the outer wall of the arc-shaped porcelain barrel (19), a second wiring pipe (8) and two first wiring pipes (5) are fixedly penetrated through one side of the outer barrel (4), second wire barrel (8) and two first wire barrels (5) are located urceolus (4) outside one end respectively fixedly connected with second terminal (7) and first terminal (6), two first wire barrel (5) respectively with the both ends electric connection of resistance wire (18), the outer wall fixed cover of second bull stick (21) is equipped with drum (29), the one end of drum (29) is provided with the adjusting part who is used for adjusting voltage, the inside of second wire barrel (8) is provided with the coupling assembling who is used for fixed connection line.

2. The high-precision wire-wound preset potentiometer according to claim 1, wherein the limiting component comprises a first clamping plate (24), a second clamping plate (32) and a third clamping plate (31) which are sequentially connected to the inner wall of one side of the rectangular box (12) in a sliding manner from top to bottom, one ends of the first clamping plate (24), the second clamping plate (32) and the third clamping plate (31) close to the outer cylinder (4) penetrate through the rectangular box (12) and the outer cylinder (4), clamping holes (33) clamped with the first clamping plate (24), the second clamping plate (32) and the third clamping plate (31) are formed in one side of the inner cylinder (3), vertical plates (36) are fixedly connected to one ends of the first clamping plate (24), the second clamping plate (32) and the third clamping plate (31) located in the rectangular box (12), second tension springs (35) are fixedly connected between one sides of the three vertical plates (36) and the inner wall of one side of the rectangular box (12), the three second extension springs (35) are respectively sleeved on the first clamping plate (24), the second clamping plate (32) and the third clamping plate (31), and protrusions (34) are fixedly connected to one sides of the bottoms of the second clamping plate (32) and the third clamping plate (31).

3. The high-precision wire-wound preset potentiometer according to claim 1, wherein the control assembly comprises a push rod (14) slidably connected inside the through hole (13), the bottom of the push rod (14) penetrates through the through hole (13) and extends to the inside of the inner cylinder (3), two fixing plates (23) symmetrically arranged are fixedly connected to the outer wall of the push rod (14), a first tension spring (25) is fixedly connected between the tops of the two fixing plates (23) and the inner wall of the top of the inner cylinder (3), and a limiting plate (15) is fixedly connected to the top of the push rod (14) and penetrates through the through hole (13).

4. The high-precision wire-wound preset potentiometer according to claim 1, wherein the adjusting assembly comprises a transverse plate (38) fixedly connected to one side of the cylinder (29), one side of the cylinder (29) is rotatably connected with a rotating plate (40), the same third tension spring (39) is fixedly connected between the top of the rotating plate (40) and the bottom of the transverse plate (38), one end of the rotating plate (40) is fixedly connected with a sliding piece (41) which is abutted to the resistance wire (18), the sliding piece (41) is electrically connected with a lead (37), and one end of the lead (37) penetrates through the second wiring pipe (8) and extends into the second wiring pipe (8).

5. A high precision wire wound preset potentiometer according to claim 1, the connecting assembly comprises an upper rectangular plate (48) fixedly connected to the inner wall of the top of the second connecting pipe (8), a first mounting groove (50) is formed in the bottom of the upper rectangular plate (48), a screw rod (47) penetrates through the inner wall of the bottom of the second wire connecting pipe (8), the top of the screw rod (47) is rotationally connected with a lower rectangular plate (46), the top of the lower rectangular plate (46) is provided with a second mounting groove (52), a plurality of electric connecting pieces (51) are fixedly connected inside the second mounting groove (52), the second binding post (7) is electrically connected with the lead (37) through an electric connecting piece (51), the bottom of the screw rod (47) extends to the position right below the second wire connecting pipe (8) and is fixedly connected with a rotary disc (28).

6. The high-precision wire-wound preset potentiometer according to claim 1, characterized in that a box door (11) is hinged to one side of the rectangular box (12), a hasp (9) is fixedly connected to one side of the box door (11), and a hook (10) matched with the hasp (9) for use is arranged on one side of the rectangular box (12).

7. The high-precision wire-wound preset potentiometer according to claim 1, characterized in that the outer wall of the arc-shaped porcelain cylinder (19) is provided with a spiral groove (42), and the resistance wire (18) is wound in the spiral groove (42).

8. A high-precision wire-wound preset potentiometer according to claim 1, characterized in that two symmetrically arranged side plates (44) are fixedly connected to one side of the cylinder (29), one side of the two side plates (44) close to each other is rotatably connected with the same rotating shaft (43), and the rotating shaft (43) is fixedly penetrated through the rotating plate (40).

9. The high-precision wire-wound preset potentiometer according to claim 5, wherein two symmetrically arranged sliding rods (45) are fixedly connected to the top of the lower rectangular plate (46), two symmetrically arranged sliding grooves (49) are formed in the bottom of the upper rectangular plate (48), and the sliding rods (45) are slidably connected with the sliding grooves (49).