CN114156046A

CN114156046A - Miniature transformer

Info

Publication number: CN114156046A
Application number: CN202111636456.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-03-08

Abstract

The invention relates to the technical field of transformers, in particular to a miniature transformer, which comprises a protection mechanism, wherein a rotating mechanism is arranged on the protection mechanism, a fixing mechanism is arranged at the bottom end of the protection mechanism, an opening and closing mechanism is connected onto the protection mechanism, the rotating mechanism drives the fixing mechanism and the opening and closing mechanism, and a sealing mechanism is arranged on the protection mechanism; the whole device can be conveniently moved in a labor-saving manner through the protection mechanism, and the transformer is conveniently and safely protected; the rotating position of the transformer can be conveniently adjusted through the rotating mechanism, and the quick wiring is convenient; the device is convenient to limit the current position of the device to be fixed through the fixing mechanism, the device is prevented from moving out of a set safe position in a deviation mode, the protective shell of the transformer is convenient to open through the opening and closing mechanism, and the device is quickly overhauled; whether can learn to operate through detecting transformer temperature through sealing mechanism, open the vent and go on the heat dissipation or sealed, inside the dust of avoiding the building site entered into equipment, the environment in the at utmost keeps the equipment.

Description

Miniature transformer

Technical Field

The invention relates to the technical field of transformers, in particular to a miniature transformer.

Background

The miniature transformer mainly refers to a single-phase transformer below 20kV & A and a three-phase transformer below 50kV & A, and is characterized by small volume, low cost and less wire consumption. The load rate and the utilization rate of the micro-transformer are generally low, inductive load carried by the micro-transformer is generally not subjected to capacitive compensation, the micro-transformer is a common device in a factory electrical control system, and the micro-transformer is increasingly widely applied along with the fact that a large number of electronic elements are applied to control, monitoring and automatic loops of a power plant.

Electric appliance is more for the building site, and needs shift at any time along with the construction progress, however, traditional transformer generally does not have protective assembly and mostly is fixed arrangement, and is not convenient for remove the wiring, can't deal with the construction site and carry out nimble use, consequently needs a miniature transformer urgently.

Disclosure of Invention

The invention provides a micro transformer aiming at the problems in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the miniature transformer comprises a protection mechanism, wherein a rotating mechanism is arranged on the protection mechanism, a fixing mechanism is arranged at the bottom end of the protection mechanism, an opening and closing mechanism is connected onto the protection mechanism, the rotating mechanism drives the fixing mechanism and the opening and closing mechanism, and a sealing mechanism is arranged on the protection mechanism.

Specifically, protection machanism includes the mounting panel, the wheel is installed respectively all around to the bottom of mounting panel, the one end welding of mounting panel has handrail and two to protect the frame, it is in the same place with the handrail welding to protect the frame, the top fixedly connected with of mounting panel is the set casing of L form, the top of mounting panel is rotated and is connected with the activity shell, the activity shell block is on the mounting panel.

Specifically, rotary mechanism includes the base, the top of mounting panel is equipped with base and shell the base links together with the shell, it is connected with first pivot to rotate on the shell, cup joint sliding connection has the worm in the first pivot, install the feather key in the first pivot, first pivot drives the worm through the feather key.

Specifically, the inside of base is rotated and is connected with the turbine, the top fixedly connected with second pivot of turbine, the transformer main part is installed on the top of second pivot, be equipped with the inlet wire box on the set casing.

Specifically, fixed establishment includes first gear, be equipped with first gear in the shell cover, first pivot of first gear sliding connection and feather key, the bottom vertical meshing of first gear has the second gear, the meshing of second gear bottom has the third gear, the bottom sliding connection of mounting panel has first screw rod, first screw rod and third gear threaded connection, the one end of mounting panel is rotated and is connected with the piece that contacts to the ground, the piece that contacts to the ground is L commentaries on classics, it is connected with first connecting rod to rotate between piece and the first screw rod to contact to the ground.

Specifically, the opening and closing mechanism comprises a fourth gear, the fourth gear is arranged inside the shell, the first rotating shaft and the sliding key are respectively in sliding connection with the fourth gear, a fifth gear is meshed at the bottom end of the fourth gear, a sixth gear is meshed at the bottom end of the fifth gear, and a second screw rod is connected to the bottom end of the mounting plate in a sliding manner.

Specifically, sixth gear and second screw rod threaded connection, the spout has been seted up on the mounting panel, sliding connection has the slider in the spout, the second screw rod rotates link block, it is connected with the second connecting rod to rotate between slider and the movable shell.

Specifically, temperature sensor is installed to transformer main part one side, a plurality of thermovents have been seted up respectively to the both sides of activity shell, the inner wall of activity shell is equipped with two sets of spacing, every group sliding connection has the grid plate on the spacing, one side of grid plate is equipped with the steering wheel, steering wheel fixed mounting is on the inner wall of activity shell, the one end fixedly connected with cam of steering wheel, it is connected with the third connecting rod to rotate between cam and the grid plate.

The invention has the beneficial effects that:

(1) according to the micro transformer, the rotating mechanism is arranged on the protection mechanism, the whole device can be conveniently moved in a labor-saving manner through the arrangement of the protection mechanism, the transformer is conveniently and safely protected, and workers are prevented from being injured by electric shock; through the setting of rotary mechanism and then be convenient for adjust the turned position of transformer, convenient quick wiring, promptly: the transformer main body is arranged on the mounting plate, a plurality of wheels are arranged at the bottom end of the mounting plate, the whole device can be pushed to move by controlling the handrails, the device is convenient to transfer, the outer side of the transformer main body is protected by the fixed shell and the movable shell, external dust and sundries are prevented from attaching to the transformer main body, the working environment of the transformer main body is greatly improved, the outer side of the movable shell is also protected by the protection frame, the protection grid formed by the protection frame and the handrails can further play a protection role on the transformer main body, the survivability of the transformer main body in a construction site is improved, the transformer main body is prevented from being damaged, the fixed shell is provided with the wire inlet box, the inlet and outlet wires needing to be butted to the transformer main body can be butted to the transformer main body through the wire inlet box, when the position of a connector lug of the transformer main body is inconvenient to be butted and the position is changed, the turntable is controlled, the first rotating shaft is pulled through the turntable, the sliding key is driven to slide into the worm, the first rotating shaft is rotated to drive the worm to rotate, the worm is meshed with the worm wheel to rotate, the worm wheel is connected with the transformer main body through the second rotating shaft, the top wiring position of the transformer main body is adjusted conveniently, corresponding contact of cables is facilitated, wiring efficiency is improved, and the device is convenient to deploy and use quickly.

(2) According to the micro transformer, the bottom end of the protection mechanism is provided with the fixing mechanism, the protection mechanism is connected with the opening and closing mechanism, the equipment is conveniently limited at the current position and fixed through the arrangement of the fixing mechanism, the equipment is prevented from moving out of a set safe position in a deviated way, the protection shell of the transformer is conveniently opened through the arrangement of the opening and closing mechanism, and the device is quickly overhauled, namely: when the main body of the voltage transformer needs to be fixed to the current position and does not move, the first rotating shaft is pulled, the sliding key slides into the first gear, the first rotating shaft rotates and then only can drive the first gear, the first gear drives the third gear through the second gear, the third gear is in threaded connection with the first screw, the first screw is in sliding connection with the mounting plate, the first rotating shaft rotates and drives the first screw to move, the first screw is connected with the ground contacting part through the first connecting rod, the ground contacting part is driven to deflect and contact the ground, two wheels are lifted and are not in contact with the ground, the mounting plate is temporarily fixed, and the main body of the transformer is prevented from moving; when the need overhauls the voltmeter body to opening the movable shell, then remove first pivot, drive the feather key and remove in the fourth gear, solitary drive fourth gear rotates, the same principle fourth gear passes through the rotation of fifth gear engagement sixth gear, the same sliding connection mounting panel of second screw rod, because sixth gear and second screw rod threaded connection, drive the slider and remove along the spout at first screw rod, the slider passes through the rotation of second connecting rod pulling movable shell, finally make the movable shell break away from the block set casing, and then conveniently open the protective housing of transformer, overhaul the device fast, and open the back movable shell can not have dead angle show transformer main part, more be favorable to the maintainer to observe and maintain.

(3) According to the micro transformer, the sealing mechanism is arranged on the protection mechanism, whether the micro transformer operates or not can be known by detecting the temperature of the transformer through the arrangement of the sealing mechanism, the ventilation opening is opened for heat dissipation or sealing, dust in a construction site is prevented from entering the interior of the micro transformer, and the environment in the micro transformer is maintained to the maximum extent, namely: temperature sensor who observes and controls the temperature is installed to one side of electric ware main part, temperature sensor with control two steering engines of drive, when the high temperature that obtains the transformer main part detects, the steering engine drives cam deflection position, the cam drives the grid board through the third connecting rod and slides, thereby can reach the effect whether sealed thermovent through the position of removing the grid board, and then can learn whether to move through detecting transformer temperature, it has dispelled the heat or sealed to open the vent, inside the dust of avoiding the building site entered into equipment, the environment in the at utmost retaining equipment.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural diagram of an overall structure of a preferred embodiment of a micro-transformer according to the present invention;

FIG. 2 is a schematic view of the connection structure of the protection mechanism and the fixing mechanism shown in FIG. 1;

FIG. 3 is a schematic view of the connection structure of the rotating mechanism, the fixing mechanism and the opening and closing mechanism shown in FIG. 1;

fig. 4 is a schematic view of a connection structure of the rotating mechanism and the opening and closing mechanism shown in fig. 1;

fig. 5 is an enlarged schematic view of a portion a shown in fig. 1.

In the figure: 1. a protection mechanism 11, a mounting plate 12, wheels 13, handrails 14, a protection frame 15, a fixed shell 16, a movable shell 2, a rotating mechanism 21, a base 22, a transformer body 23, a wire inlet box 24, a shell sleeve 25, a first rotating shaft 26, a rotating disk 27, a worm 28, a turbine 29, a second rotating shaft 29a, a sliding key 3, a fixing mechanism 31, a first gear 32, a second gear 33, the device comprises a third gear, 34, a first screw rod, 35, a first connecting rod, 36, a ground contacting piece, 4, an opening and closing mechanism, 41, a fourth gear, 42, a fifth gear, 43, a sixth gear, 44, a second screw rod, 45, a sliding groove, 46, a sliding block, 47, a second connecting rod, 5, a sealing mechanism, 51, a temperature sensor, 52, a limiting strip, 53, a grid plate, 54, a heat dissipation opening, 55, a steering engine, 56, a cam, 57 and a third connecting rod.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 5, the micro-transformer of the present invention includes a protection mechanism 1, wherein the protection mechanism 1 is provided with a rotating mechanism 2, the bottom end of the protection mechanism 1 is provided with a fixing mechanism 3, the protection mechanism 1 is connected with an opening and closing mechanism 4, the rotating mechanism 2 drives the fixing mechanism 3 and the opening and closing mechanism 4, and the protection mechanism 1 is provided with a sealing mechanism 5.

Specifically, protection machanism 1 includes mounting panel 11, wheel 12 is installed respectively all around to the bottom of mounting panel 11, the one end welding of mounting panel 11 has handrail 13 and two to protect frame 14, protect frame 14 and handrail 13 welding together, the top fixedly connected with of mounting panel 11 is the set casing 15 of L form, the top of mounting panel 11 is rotated and is connected with movable shell 16, the 16 blocks of movable shell are on mounting panel 11.

Specifically, the rotating mechanism 2 comprises a base 21, the top end of the mounting plate 11 is provided with the base 21 and a shell 24, the base 21 is connected with the shell 24, the shell 24 is rotatably connected with a first rotating shaft 25, the first rotating shaft 25 is connected with a worm 27 in a sleeved and sliding manner, the first rotating shaft 25 is provided with a sliding key 29a, and the first rotating shaft 25 drives the worm 27 through the sliding key 29 a; the transformer main body 22 is installed on the installation plate 11, a plurality of wheels 12 are installed at the bottom end of the installation plate 11, the handrail 13 can be controlled to push the whole device to move, the device is convenient to transfer, the outer side of the transformer main body 22 is also protected by the fixed shell 15 and the movable shell 16, so that the transformer main body 22 is prevented from being attached by external dust and sundries, the working environment of the transformer main body 22 is greatly improved, the outer side of the movable shell 16 is also protected by the protection frame 14, the protection frame 14 and the protection grid formed by the handrail 13 can further play a protection role on the transformer main body 22, the survival ability of the transformer main body 22 in a construction site is improved, the damage is avoided, the wire inlet box 23 is arranged on the fixed shell 15, and the incoming and outgoing lines needing to be connected to the transformer main body 22 can be connected to the transformer main body 22 through the wire inlet box 23, work as the connector lug position of transformer main part 22 is not convenient for the butt joint needs and when the transposition position, then control carousel 26, through carousel 26 stimulates first pivot 25 drives sliding key 29a slides to in the worm 27, rotate first pivot 25 drive worm 27 rotates, utilizes worm 27 meshes turbine 28 is rotatory, turbine 28 passes through second pivot 29 with transformer main part 22 links together, and then is convenient for adjust the top terminal wiring position of transformer main part 22 makes things convenient for the cable to correspond the contact, improves wiring efficiency, makes things convenient for the device to deploy the use fast.

Specifically, the buffer mechanism 2 includes a universal ball 21, the embedded part 11 is rotated to have the universal ball 21, the universal ball 21 is connected with a sleeve joint block 22, a deflection rod 23 is fixed on the universal ball 21, a universal sleeve 24 is sleeved on the deflection rod 23, and a displacement block 25 is sleeved on the universal sleeve 24.

Specifically, the inside of base 21 is rotated and is connected with turbine 28, the top fixedly connected with second pivot 29 of turbine 28, transformer main part 22 is installed on the top of second pivot 29, be equipped with inlet box 23 on the set casing 15.

Specifically, the fixing mechanism 3 includes a first gear 31, the first gear 31 is disposed in the housing 24, the first gear 31 is slidably connected to the first rotating shaft 25 and the sliding key 29a, the bottom end of the first gear 31 is vertically engaged with a second gear 32, the bottom end of the second gear 32 is engaged with a third gear 33, the bottom end of the mounting plate 11 is slidably connected to a first screw 34, the first screw 34 and the third gear 33 are in threaded connection, one end of the mounting plate 11 is rotatably connected to a ground contacting member 36, the ground contacting member 36 is in L-turn, and a first connecting rod 35 is rotatably connected between the ground contacting member 36 and the first screw 34.

Specifically, the opening and closing mechanism 4 includes a fourth gear 41, the fourth gear 41 is disposed inside the casing 24, the first rotating shaft 25 and the sliding key 29a are respectively connected to the fourth gear 41 in a sliding manner, a fifth gear 42 is engaged with the bottom end of the fourth gear 41, a sixth gear 43 is engaged with the bottom end of the fifth gear 42, and a second screw 44 is connected to the bottom end of the mounting plate 11 in a sliding manner.

Specifically, the sixth gear 43 is in threaded connection with a second screw 44, a sliding groove 45 is formed in the mounting plate 11, a sliding block 46 is connected in the sliding groove 45 in a sliding manner, the second screw 44 is connected with the sliding block 46 in a rotating manner, and a second connecting rod 47 is connected between the sliding block 46 and the movable shell 16 in a rotating manner; when the main body 22 needs to be fixed to the current position, the first rotating shaft 25 is pulled, the sliding key 29a is slid into the first gear 31, after the first rotating shaft 25 rotates, the first gear 31 can only be driven, the first gear 31 drives the third gear 33 through the second gear 32, since the third gear 33 is threadedly coupled to the first screw 34, and the first screw 34 is slidably coupled to the mounting plate 11, the first screw 34 is driven to move during the rotation of the first rotating shaft 25, the first screw 34 is connected with the ground contact piece 36 through the first connecting rod 35, thereby driving the ground engaging member 36 to deflect into contact with the ground, causing two of the wheels 12 to lift out of contact with the ground, thereby serving to temporarily fix the mounting plate 11 and preventing the transformer main body 22 from moving; when the transformer body 22 needs to be overhauled by opening the movable shell 16, the first rotating shaft 25 is moved to drive the sliding key 29a to move into the fourth gear 41, the fourth gear 41 is driven to rotate independently, the fourth gear 41 is meshed with the sixth gear 43 through the fifth gear 42 to rotate on the same principle, the second screw 44 is also connected with the mounting plate 11 in a sliding manner, due to the threaded connection between the sixth gear 43 and the second screw 41, the first screw 41 drives the sliding block 46 to move along the sliding groove 45, the sliding block 46 pulls the movable shell 16 to rotate through the second connecting rod 47, and finally the movable shell 16 is separated from and clamped with the fixed shell 15, so that the protective shell of the transformer can be opened conveniently, the device can be overhauled quickly, and the movable shell 16 can show the transformer body 22 without dead angles after being opened, more be favorable to the maintainer to observe the maintenance.

Specifically, a temperature sensor 51 is mounted on one side of the transformer main body 22, a plurality of heat dissipation ports 54 are respectively formed in two sides of the movable shell 16, two groups of limiting strips 52 are arranged on the inner wall of the movable shell 16, a grid plate 53 is slidably connected to each group of limiting strips 52, a steering engine 55 is arranged on one side of the grid plate 53, the steering engine 55 is fixedly mounted on the inner wall of the movable shell 16, a cam 56 is fixedly connected to one end of the steering engine 55, and a third connecting rod 57 is rotatably connected between the cam 56 and the grid plate 53; temperature sensor 51 is installed to one side of transformer main part 22 and is observed and controled the temperature, temperature sensor 51 with control two the drive steering wheel 55, when detecting and obtain when transformer main part 22's temperature is too high, steering wheel 55 drives cam 56 deflection position, cam 56 passes through third connecting rod 57 drives grid plate 53 slides, thereby can be through removing whether sealed is reached in grid plate 53's position heat dissipation mouth 54's effect, and then can learn whether to operate through detecting transformer temperature, open the vent and have dispelled the heat or sealed, avoid the dust on building site to enter into inside the equipment, the environment in the at utmost retaining equipment.

When the invention is used, the transformer main body 22 is arranged on the mounting plate 11, a plurality of wheels 12 are arranged at the bottom end of the mounting plate 11, the whole device can be pushed to move by operating the handrail 13, the device is convenient to transfer, the outer side of the transformer main body 22 is protected by the fixed shell 15 and the movable shell 16, external dust and sundries are prevented from being attached to the transformer main body 22, the working environment of the transformer main body 22 is greatly improved, the outer side of the movable shell 16 is also protected by the protective frame 14, the protective grid formed by the protective frame 14 and the handrail 13 can further play a role in protecting the transformer main body 22, the viability of using in a construction site is improved, the damage is avoided, the wire inlet box 23 is arranged on the fixed shell 15, wires in and out which need to be butted to the transformer main body 22 can be butted to the transformer main body 22 through the wire inlet box 23, when the position of a connector lug of the transformer main body 22 is inconvenient to be butted and replaced, the rotating disc 26 is controlled, the first rotating shaft 25 is pulled through the rotating disc 26, the sliding key 29a is driven to slide into the worm 27, the first rotating shaft 25 is rotated to drive the worm 27 to rotate, the worm 27 is meshed with the worm wheel 28 to rotate, the worm wheel 28 is connected with the transformer main body 22 through the second rotating shaft 29, the top end wiring position of the transformer main body 22 is convenient to adjust, cables are convenient to correspondingly contact, wiring efficiency is improved, and the device is convenient to rapidly deploy and use; when the main body 22 of the voltage regulator needs to be fixed to the current position and is not moved, the first rotating shaft 25 is pulled, the sliding key 29a slides into the first gear 31, the first rotating shaft 25 rotates and then only can drive the first gear 31, the first gear 31 drives the third gear 33 through the second gear 32, the third gear 33 is in threaded connection with the first screw 34, and the first screw 34 is in sliding connection with the mounting plate 11, the first rotating shaft 25 rotates and drives the first screw 34 to move, the first screw 34 is connected with the ground contact member 36 through the first connecting rod 35, so that the ground contact member 36 is driven to deflect and contact the ground, two wheels 12 are lifted and are not in contact with the ground, the mounting plate 11 is temporarily fixed, and the main body 22 of the transformer is prevented from moving; when the movable shell 16 needs to be opened to overhaul the voltage transformer body 22, the first rotating shaft 25 is moved to drive the sliding key 29a to move into the fourth gear 41, the fourth gear 41 is driven to rotate independently, the fourth gear 41 is meshed with the sixth gear 43 through the fifth gear 42 to rotate on the same principle, the second screw 44 is connected with the mounting plate 11 in a sliding mode, the sixth gear 43 is in threaded connection with the second screw 41, the first screw 41 drives the sliding block 46 to move along the sliding groove 45, the sliding block 46 pulls the movable shell 16 to rotate through the second connecting rod 47, and finally the movable shell 16 is separated from the clamping fixed shell 15, so that the protective shell of the transformer is conveniently opened, the device is overhauled quickly, and the movable shell 16 can display the transformer body 22 without dead corners after being opened, and observation and maintenance of an overhaul worker are facilitated; temperature sensor 51 of observing and controling the temperature is installed to one side of transformer main part 22, temperature sensor 51 with control two steering wheel 55 of drive, when the high temperature that obtains transformer main part 22 detects, steering wheel 55 drives cam 56 deflection position, cam 56 drives grid plate 53 through third connecting rod 57 and slides, thereby can reach the effect whether sealed thermovent 54 through the position of removing grid plate 53, and then can learn whether to operate through detecting the transformer temperature, it has dispelled the heat or sealed to open the vent, avoid the dust in building site to enter into inside the equipment, the environment in the at utmost retaining device.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A micro transformer is characterized by comprising a protection mechanism (1), wherein a rotating mechanism (2) is arranged on the protection mechanism (1), a fixing mechanism (3) is arranged at the bottom end of the protection mechanism (1), an opening and closing mechanism (4) is connected to the protection mechanism (1), the rotating mechanism (2) drives the fixing mechanism (3) and the opening and closing mechanism (4), and a sealing mechanism (5) is arranged on the protection mechanism (1);

protection machanism (1) includes mounting panel (11), wheel (12) are installed respectively all around to the bottom of mounting panel (11), the one end welding of mounting panel (11) has handrail (13) and two protection frame (14), protection frame (14) and handrail (13) welding are in the same place, the top fixedly connected with of mounting panel (11) is set casing (15) of L form, the top of mounting panel (11) is rotated and is connected with activity shell (16), activity shell (16) block is on mounting panel (11).

2. A micro-transformer according to claim 1, characterized in that: rotary mechanism (2) include base (21), the top of mounting panel (11) is equipped with base (21) and shell (24) link together, it is connected with first pivot (25) to rotate on shell (24), cup joint sliding connection has worm (27) on first pivot (25), install feather key (29a) on first pivot (25), first pivot (25) drive worm (27) through feather key (29 a).

3. A micro-transformer according to claim 2, characterized in that: the inside of base (21) is rotated and is connected with turbine (28), the top fixedly connected with second pivot (29) of turbine (28), transformer main part (22) are installed on the top of second pivot (29), be equipped with inlet box (23) on set casing (15).

4. A micro-transformer according to claim 3, characterized in that: fixed establishment (3) include first gear (31), be equipped with first gear (31) in shell (24), first pivot (25) of first gear (31) sliding connection and feather key (29a), the bottom vertical meshing of first gear (31) has second gear (32), the meshing of second gear (32) bottom has third gear (33), the bottom sliding connection of mounting panel (11) has first screw rod (34), first screw rod (34) and third gear (33) threaded connection, the one end of mounting panel (11) is rotated and is connected with to touch to the earth piece (36), it is L commentaries on classics to touch to the earth piece (36), it is connected with first connecting rod (35) to rotate between piece (36) and first screw rod (34) to touch to the earth.

5. A micro-transformer according to claim 4, characterized in that: the mechanism (4) that opens and shuts includes fourth gear (41), the inside of shell (24) is equipped with fourth gear (41), first pivot (25) and feather key (29a) respectively with fourth gear (41) sliding connection, the bottom meshing of fourth gear (41) has fifth gear (42), the meshing of fifth gear (42) bottom has sixth gear (43), the bottom sliding connection of mounting panel (11) has second screw rod (44).

6. A micro-transformer according to claim 5, characterized in that: sixth gear (43) and second screw rod (44) threaded connection, spout (45) have been seted up on mounting panel (11), sliding connection has slider (46) in spout (45), second screw rod (44) rotate and connect slider (46), it is connected with second connecting rod (47) to rotate between slider (46) and activity shell (16).

7. A micro-transformer according to claim 6, characterized in that: temperature sensor (51) are installed to transformer main part (22) one side, a plurality of thermovents (54) have been seted up respectively to the both sides of activity shell (16), the inner wall of activity shell (16) is equipped with two sets of spacing strips (52), every group sliding connection has grid plate (53) on spacing strip (52), one side of grid plate (53) is equipped with steering wheel (55), steering wheel (55) fixed mounting is on the inner wall of activity shell (16), the one end fixedly connected with cam (56) of steering wheel (55), it is connected with third connecting rod (57) to rotate between cam (56) and grid plate (53).