CN113459838A

CN113459838A - Charging gun, primary and secondary movable charging pile using charging gun and using method

Info

Publication number: CN113459838A
Application number: CN202110689773.5A
Authority: CN
Inventors: 左富生
Original assignee: Individual
Current assignee: Huanggang Power Supply Co of State Grid Hubei Electric Power Co Ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2021-10-01
Anticipated expiration: 2041-06-22
Also published as: CN113459838B

Abstract

The invention discloses a charging gun, a primary-secondary mobile charging pile using the charging gun and a using method, wherein the charging gun comprises a gun body and a waterproof device, the waterproof device is arranged to avoid the potential safety hazard of electric shock in rainy days, the primary-secondary mobile charging pile comprises a guide rail, a primary charging pile and a secondary charging pile, the secondary charging pile comprises a primary charging pile punching gun and a primary pile power connection port, the primary charging pile comprises an input charging interface and an output charging interface, the input charging pile interface is used for being coupled with a current source point, the primary charging pile charging gun of the output charging interface can be directly coupled with a battery pack of an electric vehicle, the primary pile power connection port is used for being coupled with the primary pile power connection port, the primary charging pile can move on the guide rail, the secondary charging piles are arranged in plurality, when the vehicle is charged, the primary charging piles are coupled with the battery pack of the vehicle, after card swiping or code scanning payment, queue for waiting for charging, the primary charging piles are in butt joint with the secondary charging piles according to the queue order, the waiting time of a driver on the spot is reduced, and the use efficiency of the female charging device is improved.

Description

Charging gun, primary and secondary movable charging pile using charging gun and using method

Technical Field

The invention relates to charging equipment, in particular to a charging gun, a primary and secondary movable charging pile using the charging gun and a using method.

Background

Charging pile is a device for charging electric automobile, and at present, along with the development and popularization of electric automobiles, the number of charging piles is also increased day by day. At present, the common arrangement mode of charging pile in the parking lot is: the independent electric pile that fills of every parking stall installation, every fills electric pile and possess independent power supply system and operating system, and this arrangement cost is higher.

Because the electric motor car quantity fluctuation range in the parking area is very big, it is not enough to appear easily in the parking stall that charges, leads to some electric motor cars to be unable in time to charge because of filling a small amount of electric pile. Being full of an electric motor car needs two hours to be used, few car owners can wait near the vehicle always, and it is full of the electricity often to appear the electric motor car, has not yet rolled away from the parking stall that charges, causes the wasting of resources. Therefore, the current charging pile cannot completely meet the requirements of market and practical application.

In addition, in the charging gun in the market, the electrode rod of the gun head part is exposed outside and does not have dustproof and waterproof functions, and the cap is only added to the gun head part of the partial charging gun for dustproof and waterproof functions.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a charging gun which has the characteristic of better dustproof and waterproof effects.

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

a charging gun comprises a gun body, wherein a handle is arranged at the bottom end of the gun body, a gun head is arranged at the top end of a cavity, and a waterproof device is arranged at the position of the gun head;

the waterproof device comprises a section rod, a corrugated hose and a return spring, wherein one end of the section rod penetrates through the pipe wall of the corrugated hose, and the other end of the section rod is connected with the return spring and is installed in the gun head together with the return spring.

The charging gun has the advantages that the corrugated hose is connected to the gun head through the telescopic rod, the gun head is sleeved in the gun head, the dustproof and waterproof effects are achieved, the charging gun is in butt joint with the charging port of the charging vehicle during charging, the corrugated hose can shrink when being squeezed until the gun head is coupled with the charging port, the gun head is also always in the corrugated hose, the corrugated hose does not need to be removed, the operation is convenient, and the waterproof effect is better.

the waterproof device comprises a pipe sleeve and a water baffle, a first humerus, a second humerus, a wane and a telescopic motor which are arranged in the pipe sleeve, wherein the water baffle is provided with a plurality of water baffles which can form a circle, the top end of the first humerus is hinged with the outer edge of the water baffle, the bottom end of the first humerus penetrates through a waist-shaped hole formed in the wane and is fixedly connected with the telescopic motor, a first idler wheel used for rolling friction with the upper end face of the wane is hinged to a first upper shaft pin of the humerus, the waist-shaped hole is formed in one end of the wane, a second idler wheel is hinged to a second axle pin of the other end of the wane, the top end of the second humerus is hinged with the lower end face of the water baffle, the bottom end of the second idler wheel is rolled friction, the wane is arranged in a Z shape, and the bending close to the first humerus is hinged to the pipe sleeve axle pin.

The invention is further configured to: the gun head comprises an electrode rod and an insertion column made of insulating materials, and the electrode rod is arranged in the insertion column;

a movable gap is reserved between the edge of the water baffle and the inner wall of the sleeve, a water storage gap is reserved between the outer circumferential surface of the binding post and the inner wall of the sleeve, a water outlet hole is formed in the position, close to the water storage gap, of the sleeve, and the aperture of one end, located on the inner wall of the sleeve, of the water outlet hole is larger than that of the outer wall of the sleeve.

The waterproof device has the advantages that the waterproof device can be integrated with the charging gun, can be independently arranged to be matched with the charging gun on the market for use, is wider in application range, is not influenced in sight line during charging, and is better in waterproof and dustproof effects.

Aiming at the defects in the prior art, the invention aims to provide the mobile subsidiary and subsidiary charging pile, so that the occupied time of the charging pile is saved, and the charging pile can be efficiently utilized.

a primary and secondary movable charging pile comprises a guide rail, a primary charging pile and a plurality of secondary charging piles,

the sub-charging pile comprises a sub-pile charging gun and a bracket for supporting the charging gun, a lead of the sub-pile charging gun extends into the guide rail, and a sub-pile power connection port is arranged at the end of the lead;

female electric pile that fills can slide on the guide rail, female electric pile that fills includes

Power electronics for controlling charging of a battery pack of an electric vehicle;

an input charging pile interface for coupling with a current source point within the guide rail;

and the output charging pile interface is used for charging the battery pack of the electric vehicle or/and is electrically connected with the electric connection port of the sub-pile.

The invention is further configured to: the output charging pile interface comprises a female pile charging gun and a female pile power connection port, and the female pile charging gun is connected with the female pile power connection port in parallel;

the sub-pile charging port comprises a movable seat, a male plug and an armature, the male plug and the armature are both arranged on the movable seat, and the armature is arranged in a ring shape and sleeved on the male plug;

female stake charging port includes fixing base, female plug, electro-magnet and separates the fire cover, female plug all installs on the fixing base with the electro-magnet, female plug is used for with the coupling of public plug, the electro-magnet is used for adsorbing armature after the circular telegram, separate the fire cover and install on the fixing base, the sliding seat is when ascending, arranges in and separates in the fire cover.

The invention is further configured to: the fire-proof cover mainly comprises an inner cover, an outer cover and a fire-extinguishing net, wherein the fire-extinguishing net is arranged in a cavity formed by the inner cover and the outer cover, and the inner cover is provided with a plurality of fire-extinguishing holes.

The invention is further configured to: the fixed-point fixing device comprises a movable disc, a fixed disc and a lifting motor, wherein the movable disc is arranged at the bottom of the primary charging pile and is connected with the fixed disc in a clamping manner through the driving of the lifting motor;

the fixed disc comprises a honeycomb base, a telescopic rod and a compression spring, a plurality of bee holes are formed in the honeycomb base, the telescopic rod and the compression spring are installed in each bee hole, the top end of each telescopic spring is fixedly connected with the bottom end of each telescopic rod, and the bottom end of each telescopic spring is fixedly connected with the bottom wall of each bee hole;

the movable disc comprises a honeycomb top seat and a brake rod, a plurality of blind holes are formed in the lower section of the honeycomb top seat, the brake rod is installed in each blind hole, and the brake rods are connected in the blind holes in a threaded mode.

The invention is further configured to: install between female electric pile and the guide rail and lead boots, lead boots including leading wheel one and leading wheel two that set up in the relative both sides of guide rail, be provided with leading wheel three between leading wheel one and the leading wheel two, leading wheel one, leading wheel two and leading wheel three become the triangular distribution on the coplanar, and all with guide rail sliding connection.

The invention is further configured to: the support of sub-electric pile includes pile body and base, the bottom of pile body is equipped with the balance plate, the top of base is equipped with the opening, the opening position at the base is installed to the balance plate, constitute between balance plate and the base and hold the chamber, hold the intracavity and be provided with balancing unit, balancing unit includes balance spring, balance ball and ball seat, ball seat fixed connection is on the interior diapire of base, the pile body passes through balance ball and ball seat swing joint, balance spring is provided with a plurality of, distributes around balance ball, balance spring's top all with balance plate fixed connection, balance spring's bottom all with the interior diapire fixed connection of base.

The invention has the advantages that the structure of the sub-charging piles is simple, a plurality of sub-charging piles are installed in the parking lot, the overall cost is relatively low, after the charging guns on the sub-charging piles are connected to the charging vehicles, payment can be carried out in a queuing waiting stage, then the main charging pile moves on the guide rail and is connected with the sub-charging piles, so that the effect of charging the electric vehicles is realized, and the phenomenon that the electric vehicles are missed to be charged due to the fact that the charging parking places are occupied is avoided.

Aiming at the defects in the prior art, the invention aims to provide a method for using a mobile charging pile for a parent and a subsidiary, which is simple and convenient to operate.

a method for using a mother-son movable charging pile,

step 1, enabling an electric vehicle to stably drive into a charging parking space, and coupling a charging gun on a sub-charging pile with a battery pack interface of the electric vehicle;

step 2, queuing for charging after card swiping or code scanning payment, sequentially moving the parent charging pile to the corresponding child charging pile positions according to a queuing sequence, and coupling the parent charging pile with the child charging port through an output charging pile interface;

and 3, when the battery pack of the electric vehicle is fully charged or the charging is interrupted for 5-10 seconds, the output charging pile interface is separated from the electric connection port of the sub-pile, and the mother charging pile moves to the position of the sub-charging pile of the next electric vehicle to be charged on the guide rail.

The parking lot charging pile has the advantages that the parking lot charging pile is simple and convenient to operate, a driver does not need to wait on the parking lot, unnecessary waiting time is saved for the driver, and the use efficiency of the charging pile is improved to a great extent.

Drawings

FIG. 1 is a schematic view of a charging gun according to an embodiment 1 of the present invention;

FIG. 2 is a schematic view of embodiment 2 of the charging gun of the present invention;

FIG. 3 is a schematic view showing a waterproof device installed in a casing according to embodiment 2 of the charging gun of the present invention;

FIG. 4 is a schematic diagram of the primary and secondary mobile charging piles;

FIG. 5 is a schematic view of a sub-pile charging port;

FIG. 6 is a schematic view of a sub-pile charging port coupled with a parent pile charging port;

FIG. 7 is a schematic view showing a state in which the movable tray is separated from the fixed tray;

FIG. 8 is a schematic view showing a state in which the movable tray and the fixed tray are combined;

FIG. 9 is a schematic view of a guide shoe;

fig. 10 is a perspective view of a sub charging pile;

fig. 11 is a structural view of the sub-charging device.

In the figure: 1. a gun body; 2. a rod is saved; 3. a corrugated hose; 4. a return spring; 5. a water baffle; 6. humerus I; 7. a second humerus; 8. a seesaw; 9. a telescopic motor; 10. a first roller; 11. a second roller; 12. a sleeve; 13. a sub-charging pile; 14. a female charging pile; 15. a guide rail; 16. a movable seat; 17. a male plug; 18. an armature; 19. a fixed seat; 20. a female plug; 21. an electromagnet; 22. a fire shield; 23. a lifting motor; 24. a honeycomb base; 25. a telescopic rod; 26. a compression spring; 27. a honeycomb top seat; 28. a brake lever; 29. a guide shoe; 291. a first guide wheel; 292. a second guide wheel; 293. a third guide wheel; 30. a pile body; 31. a base; 32. a balance plate; 33. a balance spring; 34. a balance ball; 35. a ball seat.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless stated to the contrary, the use of the terms "upper and lower" are generally used with respect to the orientation shown in the drawings, or with respect to the vertical, vertical or gravitational direction; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; "inner and outer" refer to the inner and outer relative to the profile of the respective member itself, but the above directional terms are not intended to limit the present invention.

The utility model provides a rifle charges, includes the rifle body 1, and the bottom of the rifle body 1 sets up to the handle, and the top of cavity sets up to the rifle head, and the rifle head position is provided with watertight fittings, and watertight fittings has two kinds of implementation modes:

example 1

According to the figure 1, the waterproof device comprises a section rod 2, a corrugated hose 3 and a return spring 4, one end of the section rod 2 penetrates into the pipe wall of the corrugated hose 3, the other end of the section rod is connected with the return spring 4, and the section rod and the return spring 4 are installed in the gun head together. The corrugated hose 3 made of the transparent material is connected to the gun head through the joint rod 2, the gun head is sleeved in the corrugated hose 3, the dustproof and waterproof effect is achieved, the charging gun is in butt joint with a charging port of a charging vehicle when charging is conducted, the corrugated hose 3 can shrink when being squeezed until the gun head is coupled with the charging port, the gun head is also always in the corrugated hose 3, the corrugated hose 3 does not need to be removed, operation is convenient, and the waterproof effect is better.

Example 2

According to fig. 2, the waterproof device includes the pipe box and sets up breakwater 5 in the pipe box, first humerus 6, second humerus 7, wane 8 and flexible motor 9, breakwater 5 is equipped with a plurality ofly, a plurality of breakwaters 5 can constitute circularly, the top of first humerus 6 is articulated with the outward flange of breakwater 5, the waist type hole that the bottom was seted up from wane 8 passes, and with flexible motor 9 fixed connection, first gyro wheel 10 that is used for with wane 8 up end rolling friction is articulated to the axis pin on first humerus 6, waist type hole has been seted up to the one end of wane 8, other end axis pin articulates there is second gyro wheel 11, the top of second humerus 7 is articulated with the lower terminal surface of breakwater 5, the bottom and second gyro wheel 11 rolling friction, wane 8 sets up to the Z type, its bending that is close to first humerus 6 is in the pipe box and articulates the pivot.

According to fig. 3, the lance head comprises an electrode rod and a plug-in column made of an insulating material, the electrode rod being arranged in the plug-in column; a movable gap is reserved between the edge of the water baffle 5 and the inner wall of the sleeve 12, a water storage gap is reserved between the outer circumferential surface of the binding post and the inner wall of the sleeve, a water outlet hole is formed in the position, close to the water storage gap, of the sleeve 12, and the aperture of the water outlet hole at one end, located on the inner wall of the sleeve 12, is larger than that of the end, located on the outer wall of the sleeve 12.

Combine fig. 2, 3 to show, watertight fittings can with the integrative setting of rifle that charges, can also independently set up the rifle that charges on the cooperation market and use, application range is wider, when charging moreover, the sight is not influenced, waterproof dustproof effect is also better.

According to the figure 4, the primary and secondary movable charging pile comprises a guide rail 15, a primary charging pile 14 and a plurality of secondary charging piles 13, wherein each secondary charging pile 13 comprises a secondary pile charging gun and a bracket for supporting the charging gun, a lead of each secondary pile charging gun extends into the guide rail 15, and a secondary pile power connection port is formed in the end of each secondary pile charging gun; the female charging pile 14 can slide on the guide rail 15, and the female charging pile 14 comprises a power electronic device for controlling the charging of the battery pack of the electric vehicle; an input charging pile interface for coupling with a current source point within the guide rail 15; and the output charging pile interface is used for charging the battery pack of the electric vehicle or/and is electrically connected with the electric connection port of the sub-pile. The sub-charging piles 13 are distributed in one-to-one correspondence with the parking spaces, and in order to be convenient to use, each sub-charging pile 13 is provided with an operator for a user to select a charging mode and guide operation, and the battery state of the electric vehicle and the expense information of the user IC card are displayed, so that unmanned management is realized; or, in order to reduce the cost, a general control console with an operator is provided on the side of the guide rail 15.

As shown in fig. 5 and 6, the output charging pile interface includes a female pile charging gun and a female pile power connection port, the female pile charging gun is connected in parallel with the female pile power connection port, and the female pile charging gun can be directly coupled with the battery pack port of the charging vehicle as with the sub-pile charging gun; the sub-pile charging port comprises a movable seat 16, a male plug 17 and an armature 18, the male plug 17 and the armature 18 are both arranged on the movable seat 16, and the armature 18 is arranged in a ring shape and sleeved on the male plug 17; the female pile charging port comprises a fixed seat 19, a female plug 20, an electromagnet 21 and a fire-proof cover 22, wherein the female plug 20 and the electromagnet 21 are both installed on the fixed seat 19, the female plug 20 is used for being coupled with the male plug 17, the electromagnet 21 is used for adsorbing the armature 18 after being electrified, the fire-proof cover 22 is installed on the fixed seat 19, and the movable seat 16 is placed in the fire-proof cover 22 when ascending. The fire-proof cover 22 mainly comprises an inner cover, an outer cover and a fire-extinguishing net, wherein the fire-extinguishing net is arranged in a cavity formed by the inner cover and the outer cover, and a plurality of fire-absorbing holes are formed in the inner cover.

As shown in fig. 7 and 8, the fixed point fixing device is used for keeping the primary charging pile 14 stable after moving to the secondary charging piles 13 and preventing shaking, and the fixed point fixing device comprises a movable disc, a fixed disc and a lifting motor 23, wherein the movable disc is installed at the bottom of the primary charging pile 14 and is clamped with the fixed disc through the driving of the lifting motor 23, the fixed discs are installed in the guide rails 15, and the fixed discs are provided in a plurality and are in one-to-one correspondence with the secondary charging piles 13; the fixed disc comprises a honeycomb base 24, an expansion link 25 and a compression spring 26, a plurality of bee holes are formed in the honeycomb base 24, the expansion link 25 and the compression spring 26 are installed in each bee hole, the top end of each expansion spring is fixedly connected with the bottom end of the expansion link 25, and the bottom end of each expansion spring is fixedly connected with the bottom wall of each bee hole; the movable disc comprises a honeycomb footstock 27 and a brake rod 28, a plurality of blind holes are formed in the lower section of the honeycomb footstock 27, the brake rod 28 is installed in each blind hole, and the brake rod 28 is connected in the blind holes in a threaded mode.

According to fig. 7, when the fixed disk is separated from the movable disk, the brake lever 28 is also separated from the telescopic rod 25, the brake lever 28 can freely move along with the honeycomb top seat 27, the telescopic rod 25 and the compression spring 26 are both in an initial state, and the top end of the telescopic rod 25 is protruded out of the bee hole.

According to fig. 8, when the fixed disk is merged with the movable disk, the telescopic link 25 that offsets with the brake lever 28 is to shrinking in the bee hole, and compression spring 26 is in the elastic pressure state of changing this moment, and brake lever 28 is absorbed in not rather than the rest of telescopic links 25 that offsets to realize the fixed effect of movable disk, because, telescopic link 25 is provided with a plurality ofly, even female electric pile 14 takes place inertial movement phenomenon, also can ensure the fixed effect of female electric pile 14 after being put upright steadily.

According to fig. 9, a guide shoe 29 is installed between the female charging pile 14 and the guide rail 15, the guide shoe 29 includes a first guide wheel 291 and a second guide wheel 292 which are arranged on opposite sides of the guide rail 15, a third guide wheel 293 is arranged between the first guide wheel 291 and the second guide wheel 292, and the first guide wheel 291, the second guide wheel 292 and the third guide wheel 293 are distributed in a triangular manner on the same plane and are all connected with the guide rail 15 in a sliding manner. Lead setting up of boots 29 and be used for ensuring that female electric pile that dashes operates steadily on guide rail 15, prevent to fill electric pile and take place the shake on the deflector roll, reduce the potential safety hazard.

According to fig. 10 and 11, the support of the sub-charging pile 13 comprises a pile body 30 and a base 31, a balance plate 32 is arranged at the bottom of the pile body 30, an opening is formed in the top of the base 31, the balance plate 32 is installed at the opening position of the base 31, a containing cavity is formed between the balance plate 32 and the base 31, a balance device is arranged in the containing cavity, the balance device comprises a balance spring 33, a balance ball 34 and a ball seat 35, the ball seat 35 is fixedly connected to the inner bottom wall of the base 31, the pile body 30 is movably connected with the ball seat 35 through the balance ball 34, the balance spring 33 is provided with a plurality of parts and distributed around the balance ball 34, the top of the balance spring 33 is fixedly connected with the balance plate 32, and the bottom of the balance spring 33 is fixedly connected with the inner bottom wall of the base 31. The base 31 is buried underground and fixed through concrete and bolts, and the balancing device in the base 31 is used for avoiding being deformed and influencing the use due to collision and bending, and has a buffering effect.

A method for using a mother-son movable charging pile,

step 1, enabling an electric vehicle to stably drive into a charging parking space, and coupling a charging gun on a sub-charging pile 13 with a battery pack interface of the electric vehicle;

step 2, queuing for charging after card swiping or code scanning payment, sequentially moving the master charging pile 14 to the corresponding sub charging pile positions according to the queuing sequence, and coupling the master charging pile with the sub pile electric connection ports through the output charging pile interfaces;

and 3, when the battery pack of the electric vehicle is fully charged or the charging is interrupted for 5-10 seconds, the output charging pile interface is separated from the electric connection port of the sub-pile, and the female charging pile 14 moves to the position of the sub-charging pile 13 of the next electric vehicle to be charged on the guide rail 15.

The child fills electric pile 13 simple structure, and the parking area installation is a plurality of, and overall cost is also lower relatively, and the back is connected on charging vehicle to the rifle that charges on the child fills electric pile 13, pays and just can get into the waiting stage of lining up, then female fills electric pile 14 and moves on guide rail 15, is connected with child fills electric pile 13 to the effect of charging for electric vehicle is realized, avoids being occupied because of the parking stall of charging and misses and charge for electric vehicle. The operation is also comparatively simple and convenient, does not need the driver to wait at the parking area scene, saves unnecessary latency for the driver, and the improvement of very big degree fills the availability factor of electric pile.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a rifle charges, includes the rifle body (1), the bottom of the rifle body (1) sets up to the handle, the top of cavity sets up to rifle head, characterized by: a waterproof device is arranged at the gun head part;

the waterproof device comprises a section rod (2), a corrugated hose (3) and a return spring (4), one end of the section rod (2) penetrates into the pipe wall of the corrugated hose (3), the other end of the section rod is connected with the return spring (4), and the section rod and the return spring (4) are installed in the gun head together.

2. The utility model provides a rifle charges, includes the rifle body (1), the bottom of the rifle body (1) sets up to the handle, the top of cavity sets up to rifle head, characterized by: a waterproof device is arranged at the gun head part;

the waterproof device comprises a pipe sleeve and a water baffle (5), a first humerus (6), a second humerus (7), a wane (8) and a telescopic motor (9) which are arranged in the pipe sleeve, wherein the water baffle (5) is provided with a plurality of water baffles (5) which can form a circle, the top end of the first humerus (6) is hinged with the outer edge of the water baffle (5), the bottom end of the first humerus (6) penetrates through a waist-shaped hole formed in the wane (8) and is fixedly connected with the telescopic motor (9), a first roller (10) for rolling friction with the upper end face of the wane (8) is hinged on an upper shaft pin of the first humerus (6), a waist-shaped hole is formed in one end of the wane (8), a second roller (11) is hinged on a shaft pin at the other end of the wane (8), the top end of the second humerus (7) is hinged with the lower end face of the water baffle (5), the bottom end of the second roller (11) is rolled friction, the wane (8) is arranged in a Z shape, the bend of the humerus I (6) is hinged at the pipe sleeve shaft pin.

3. The charging gun of claim 2, wherein: the gun head comprises an electrode rod and an insertion column made of insulating materials, and the electrode rod is arranged in the insertion column;

leave the free gap between the edge of breakwater (5) and the inner wall of sleeve pipe (12), leave the retaining clearance between the outer periphery of terminal and the inner wall of pipe box, sleeve pipe (12) have seted up the apopore near retaining clearance department, the one end aperture that the apopore is located sleeve pipe (12) inner wall is greater than the one end aperture of sleeve pipe (12) outer wall.

4. A child-mother mobile charging pile using the charging gun of claim 2, characterized in that: comprises a guide rail (15), a mother charging pile (14) and a plurality of son charging piles (13),

the sub-charging pile (13) comprises a sub-pile charging gun and a bracket for supporting the charging gun, a lead of the sub-pile charging gun extends into the guide rail (15), and a sub-pile power connection port is arranged at the end of the lead;

the female charging pile (14) can slide on a guide rail (15), and the female charging pile (14) comprises

an input charging pile interface for coupling with a current source point within the guide rail (15);

5. The mobile primary-secondary charging pile according to claim 4, characterized in that: the output charging pile interface comprises a female pile charging gun and a female pile power connection port, and the female pile charging gun is connected with the female pile power connection port in parallel;

the sub-pile charging port comprises a movable seat (16), a male plug (17) and an armature (18), the male plug (17) and the armature (18) are both installed on the movable seat (16), and the armature (18) is arranged in a ring shape and sleeved on the male plug (17);

female stake charging port includes fixing base (19), female plug (20), electro-magnet (21) and separates fire cover (22), female plug (20) and electro-magnet (21) are all installed on fixing base (19), female plug (20) are used for with public plug (17) coupling, electro-magnet (21) are used for adsorbing armature (18) after the circular telegram, it installs on fixing base (19) to separate fire cover (22), movable seat (16) are when ascending, arrange in and separate in fire cover (22).

6. The mobile primary-secondary charging pile according to claim 5, characterized in that: the fire insulation cover (22) mainly comprises an inner cover, an outer cover and a fire extinguishing net, wherein the fire extinguishing net is arranged in a cavity formed by the inner cover and the outer cover, and the inner cover is provided with a plurality of fire absorbing holes.

7. The mobile primary-secondary charging pile according to claim 4, characterized in that: the fixed-point fixing device comprises a movable disc, a fixed disc and a lifting motor (23), wherein the movable disc is arranged at the bottom of the primary charging pile (14) and is connected with the fixed disc in a clamping manner through the driving of the lifting motor (23), the fixed disc is arranged in the guide rail (15), and the fixed discs are arranged in a plurality and correspond to the secondary charging piles (13) one by one;

the fixed disc comprises a honeycomb base (24), an expansion link (25) and compression springs (26), a plurality of bee holes are formed in the honeycomb base (24), the expansion link (25) and the compression springs (26) are installed in each bee hole, the top ends of the expansion springs are fixedly connected with the bottom ends of the expansion links (25), and the bottom ends of the expansion springs are fixedly connected with the bottom walls of the bee holes;

the movable disc comprises a honeycomb top seat (27) and a brake rod (28), a plurality of blind holes are formed in the lower section of the honeycomb top seat (27), the brake rod (28) is installed in each blind hole, and the brake rod (28) is connected in the blind holes in a threaded mode.

8. The mobile primary-secondary charging pile according to claim 7, characterized in that: install between female electric pile (14) and the guide rail (15) and lead boots (29), lead boots (29) including setting up leading wheel (291) and leading wheel two (292) in the relative both sides of guide rail (15), be provided with leading wheel three (293) between leading wheel (291) and leading wheel two (292), leading wheel (291), leading wheel two (292) and leading wheel three (293) become the triangular distribution on the coplanar, and all with guide rail (15) sliding connection.

9. The mobile primary-secondary charging pile according to claim 8, characterized in that: the support of the sub-charging pile (13) comprises a pile body (30) and a base (31), the bottom of the pile body (30) is provided with a balance plate (32), the top of the base (31) is provided with an opening, the balance plate (32) is arranged at the opening position of the base (31), a cavity is formed between the balance plate (32) and the base (31), a balancing device is arranged in the containing cavity and comprises a balancing spring (33), a balancing ball (34) and a ball seat (35), the ball seat (35) is fixedly connected on the inner bottom wall of the base (31), the pile body (30) is movably connected with the ball seat (35) through a balance ball (34), a plurality of balance springs (33) are arranged and distributed around the balance ball (34), the top parts of the balance springs (33) are fixedly connected with the balance plate (32), the bottom of the balance spring (33) is fixedly connected with the inner bottom wall of the base (31).

10. A method for using a parent-subsidiary mobile charging pile is characterized by comprising the following steps:

step 1, enabling an electric vehicle to stably drive into a charging parking space, and coupling a charging gun on a sub-charging pile (13) with a battery pack interface of the electric vehicle;

step 2, queuing for charging after card swiping or code scanning payment, sequentially moving the parent charging pile (14) to the corresponding child charging pile positions according to the queuing sequence, and coupling the parent charging pile with the child pile power connection port through an output charging pile interface;

and 3, when the battery pack of the electric vehicle is fully charged or the charging is interrupted for 5-10 seconds, the output charging pile interface is separated from the electric connection port of the sub-pile, and the mother charging pile (14) moves to the position of the sub-charging pile (13) of the next electric vehicle to be charged on the guide rail (15).