CN108282006A - A kind of portable type on-board charging system for new-energy automobile - Google Patents

Abstract

The invention relates to a convenient on-board charging system for new energy vehicles, comprising a first housing, a second housing, a USB interface, a wire take-up mechanism and a dust-proof mechanism, the wire take-up mechanism includes a power supply assembly, a guide rail, a screw rod, a rotating Shaft, first sliding block, guide ring, second sliding block, charging cable, transmission assembly, brake assembly, two turntables and two telescopic ropes, dustproof assembly includes drive assembly, first connecting rod, second connecting rod And dust cover, this is used in the convenient on-board charging system of new energy vehicles, the charging range of the charging system is not only expanded through the wire take-up mechanism, but also the charging wires can be stored in the charging system in an orderly manner, reducing the The probability of the charging wires being entangled improves the practicability of the charging system. The dust-proof mechanism not only reduces the amount of dust entering the USB interface, but also reduces the probability of damage to the USB interface during the use of the charging system. , improve the practicability of the charging system.

Description

A convenient on-board charging system for new energy vehicles

technical field

The invention relates to the field of on-board charging equipment, in particular to a convenient on-board charging system for new energy vehicles.

Background technique

The on-board charging system refers to the on-board charging system that is conventionally powered by the car battery, and is widely used in the lithium battery charging field of various portable and handheld devices.

Generally, when people drive new energy vehicles, they will charge mobile devices through the on-board charging system. When the general on-board charging system is in use, if the length of the charging cable is not enough, it will cause people in the back seat of the car to be unable to charge. The length of the cable is too long, and when the charging cable is stored, the charging cable may be entangled, which greatly reduces the practicability of the car charging system. Not only that, the USB interface of the general car charging system has no protection measures, which will cause dust to enter the USB interface Internally, resulting in poor contact of the USB interface.

Contents of the invention

The technical problem to be solved by the present invention is to provide a convenient on-board charging system for new energy vehicles in order to overcome the deficiencies of the prior art.

The technical solution adopted by the present invention to solve its technical problems is: a convenient on-board charging system for new energy vehicles, including a first shell, a second shell, a USB interface, a wire take-up mechanism and a dustproof mechanism. The second shell is set on one side of the first shell, the USB interface is set under the first shell, the wire take-up mechanism is set inside the first shell, and the dustproof mechanism is set on the USB interface;

The take-up mechanism includes a power supply assembly, a guide rail, a screw mandrel, a rotating shaft, a first sliding block, a guide ring, a second sliding block, a charging line, a transmission assembly, a braking assembly, two turntables and two telescopic ropes. The rotating shaft is horizontally arranged at the inner lower end of the first shell, and the two rotating disks are respectively arranged at both ends of the rotating shaft, one end of the two telescopic ropes is respectively wound on the two rotating disks, and the other ends of the two telescopic ropes are respectively arranged On the lower end shell of the first shell, the screw rod is horizontally arranged above the rotating shaft, the guide rail is horizontally arranged above the screw rod, and a through hole is provided inside the first sliding block, and the screw rod Through the first sliding block, the screw rod is threadedly connected with the first sliding block, the guide ring is arranged on the first sliding block, the inside of the second sliding block is provided with a through hole, and the guide rail passes through the first sliding block Two sliding blocks, the first sliding block is fixedly connected to the second sliding block, the power supply assembly is arranged above the second sliding block, one end of the charging line is wound on the rotating shaft, and the other end of the charging line is One end is connected to the power supply assembly through the guide ring, one end of the screw rod and the rotating shaft is arranged inside the second housing, one end of the transmission assembly is connected to one end of the screw rod, and the other end of the transmission assembly is connected to the rotating shaft. Shaft connection, the brake assembly is arranged in the middle of the second housing;

The brake assembly includes a support rod, a second spring, a third sliding block, a first transmission rod, a button, two second transmission rods and two brake pads, and the support rod is horizontally arranged in the middle of the second housing , the inside of the third sliding block is provided with a through hole, the support rod passes through the third sliding block, the second spring is sleeved on the end of the support rod close to the first shell, the second spring One end is arranged on the third sliding block, the other end of the second spring is arranged on the inner wall of the second housing, one ends of the two second transmission rods are respectively arranged above and below the third sliding block, and the two braking The discs are respectively arranged on the other ends of the two second transmission rods, and the two brake discs respectively abut against the first rotating wheel and the second rotating wheel, and one end of the first transmission rod is arranged on the third sliding block , the other end of the first transmission rod is arranged outside the second housing, and the button is arranged on the other end of the first transmission rod;

The dustproof assembly includes a drive assembly, a first connecting rod, a second connecting rod and a dust cover, one end of the first connecting rod is arranged on the first shell, and the other end of the first connecting rod is connected to the second connecting rod. One end of the connecting rod is hinged, the second connecting rod is provided with a slot, the dust cover is arranged on a side of the second connecting rod close to the USB interface, and the driving assembly is arranged inside the first shell.

Preferably, in order to make the screw rod and the rotating shaft rotate synchronously, the transmission assembly includes a first rotating wheel, a second rotating wheel and a transmission belt, one end of the screw rod and the rotating shaft are both arranged inside the second housing, and the The first rotating wheel is arranged on one end of the screw rod, the second rotating wheel is arranged on one end of the rotating shaft, and the first rotating wheel is connected to the second rotating wheel through a transmission belt.

Preferably, in order to supply power to the on-board charging system, the power supply assembly includes a charging head, a first spring, a sleeve, two ball screws and two limit blocks, the sleeve is arranged above the second sliding block, The inner walls of both sides of the sleeve are respectively provided with a card slot, the inside of the charging head is provided with a cavity, and the two sides of the cavity are respectively provided with an opening, and two wave bead screws are respectively arranged on two In the opening, two limit blocks are respectively arranged on two wave bead screws, both limit blocks are arranged inside the cavity, the first spring is arranged between the two wave bead screws, and the wave bead The screws match the card slots.

Preferably, in order to provide power for the turning over of the second connecting rod, the drive assembly includes a cylinder and a drive block, one end of the cylinder is arranged inside the first housing, and the drive block is arranged on the other end of the cylinder, so The drive block is arranged inside the slot.

Preferably, in order to reduce the volume of the cylinder, the cylinder is a miniature cylinder.

Preferably, in order to drive the third sliding block to move in a direction close to the first rotating wheel, the second spring is in a compressed state.

Preferably, in order to improve the anti-skid effect of the brake pad, the brake pad is made of rubber.

Preferably, in order to make the two ball screws move away from each other, the first spring is in a compressed state.

Preferably, in order to improve the smoothness of movement of the first sliding block, lubricant is coated on the outer surface of the screw rod.

Preferably, in order to reduce the possibility of slipping between the turntable and the rotating shaft, a limiting bar is further provided on the rotating shaft.

The beneficial effect of the present invention is that in the convenient on-board charging system for new energy vehicles, the charging range of the charging system is not only expanded by the wire take-up mechanism, but also the charging wires can be stored in an orderly manner inside the charging system, Thereby reducing the probability of the charging wires being entangled together and improving the practicability of the charging system. Compared with the existing mechanism, the structure of the mechanism is ingenious. Through manual operation, the power consumption of the charging system on the car battery is reduced. Not only that, Through the dust-proof mechanism, the USB interface can be protected, which not only reduces the amount of dust entering the USB interface, but also reduces the probability of damage to the USB interface during the use of the charging system, further improving the practicability of the charging system , compared with the existing mechanism, the structure of the mechanism is simple, which reduces the probability of failure.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic structural view of a convenient on-board charging system for new energy vehicles of the present invention;

Fig. 2 is a schematic structural view of a power supply assembly of a convenient on-board charging system for a new energy vehicle of the present invention;

Fig. 3 is a schematic structural view of the sleeve of the convenient on-board charging system for new energy vehicles of the present invention;

Fig. 4 is an enlarged view of part A of Fig. 1;

Fig. 5 is a structural schematic diagram of the dust-proof mechanism of the convenient on-board charging system for new energy vehicles of the present invention;

In the figure: 1. The first sliding block, 2. Guide ring, 3. The second sliding block, 4. Sleeve, 5. The first shell, 6. Guide rail, 7. Screw rod, 8. The second shell, 9. Retractable rope, 10. Turntable, 11. Charging cable, 12. Rotating shaft, 13. Charging head, 14. Limiting block, 15. Cavity, 16. First spring, 17. Bead screw, 18. Card slot, 19. the first rotating wheel, 20. transmission belt, 21. support rod, 22. button, 23. the second rotating wheel, 24. the second spring, 25. the third sliding block, 26. the first transmission rod, 27. the first Two transmission rods, 28. brake pads, 29. cylinder, 30. the first connecting rod, 31. the second connecting rod, 32. slotting, 33. driving block, 34. USB interface, 35. dust cover.

Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

As shown in Fig. 1, a kind of convenient on-board charging system for new energy vehicles comprises a first shell 5, a second shell 8, a USB interface 34, a wire take-up mechanism and a dustproof mechanism, and the second shell 8 is set On one side of the first casing 5, the USB interface 34 is arranged below the first casing 5, the wire take-up mechanism is arranged inside the first casing 5, and the dustproof mechanism is arranged on the USB interface 34;

As shown in Figure 1, the wire take-up mechanism includes a power supply assembly, a guide rail 6, a screw mandrel 7, a rotating shaft 12, a first sliding block 1, a guide ring 2, a second sliding block 3, a charging line 11, a transmission assembly, a A moving assembly, two rotating disks 10 and two telescopic ropes 9, the rotating shaft 12 is horizontally arranged at the inner lower end of the first housing 5, the two rotating disks 10 are respectively arranged at two ends of the rotating shaft 12, and the two telescopic ropes 9 One end of which is respectively wound on the two turntables 10, the other ends of the two telescopic ropes 9 are all arranged on the lower end shell of the first shell 5, the screw mandrel 7 is horizontally arranged above the rotating shaft 12, and the guide rail 6 is horizontally arranged above the screw rod 7, the inside of the first sliding block 1 is provided with a through hole, the screw rod 7 passes through the first sliding block 1, and the screw rod 7 is screwed to the first sliding block 1 , the guide ring 2 is arranged on the first sliding block 1, the inside of the second sliding block 3 is provided with a through hole, the guide rail 6 passes through the second sliding block 3, the first sliding block 1 and the second sliding block The two sliding blocks 3 are fixedly connected, the power supply assembly is arranged above the second sliding block 3, one end of the charging line 11 is wound on the rotating shaft 12, and the other end of the charging line 11 passes through the guide ring 2 and the The power supply assembly is connected, and one end of the screw mandrel 7 and the rotating shaft 12 is arranged inside the second housing 8, one end of the transmission assembly is connected with one end of the screw mandrel 7, and the other end of the transmission assembly is connected to the rotating shaft 12 connected, the brake assembly is arranged in the middle of the second housing 8;

Among them, when people need to use the on-board charging equipment, people only need to connect the power supply component to the power supply port on the car. When people pull the power supply component, the rotating shaft 12 is pulled by the charging cable 11 to rotate, so that the telescopic The rope 9 is elongated, so that under the action of the transmission assembly, the screw rod 7 is driven to rotate through the rotating shaft 12, and then the first sliding block 1 is driven to move to the right through the screw rod 7, thereby driving the guide ring 1 to move to the right, thus realizing For the guiding effect of the charging line 11, under the action of the guide rail 6, the first sliding block 1 drives the second sliding block 3 to move to the right, so that the second sliding block 3 drives the power supply assembly to move, reducing the charging line 11 being stuck. When the charging line 11 is pulled to a certain length, the rotating shaft 12 will stop rotating under the action of the brake assembly, so that the charging line 11 will remain at the current length. After the charging is completed, people only need to press the The brake assembly, under the action of the telescopic rope 9, pulls the rotating shaft 12 to rotate, so that the charging line 11 is wound on the rotating shaft 12 through the rotating shaft 12, and under the action of the transmission assembly, the screw rod 7 is driven through the rotating shaft 12 Rotate, so that under the action of the screw rod 7, the first sliding block 1 is driven to move to the left, so that under the action of the guide ring 2, the charging line 11 is wound on the rotating shaft 12 in an orderly manner from right to left, and the charging The retraction and retraction of the wire 11 not only expands the charging range of the charging system, but also reduces the probability of the charging wire 11 being entangled together, improving the practicability of the charging system;

As shown in Figure 4, the brake assembly includes a support rod 21, a second spring 24, a third sliding block 25, a first transmission rod 26, a button 22, two second transmission rods 27 and two brake pads 28 , the support rod 21 is horizontally arranged in the middle of the second housing 8, the inside of the third sliding block 25 is provided with a through hole, the support rod 21 passes through the third sliding block 25, and the second spring 24 sets One end of the second spring 24 is arranged on the third sliding block 25, and the other end of the second spring 24 is arranged on the inner wall of the second housing 8. , one end of the two second transmission rods 27 is respectively arranged above and below the third sliding block 25, and the two brake pads 28 are respectively arranged on the other ends of the two second transmission rods 27, and the two brake pads 28 Respectively against the first rotating wheel 19 and the second rotating wheel 23, one end of the first transmission rod 26 is arranged on the third sliding block 25, and the other end of the first transmission rod 26 is arranged on the second housing 8, the button 22 is arranged on the other end of the first transmission rod 26;

Wherein, push the button 22 to move to the left by manpower, thereby drive the third sliding block 25 to move to the left along the support rod 21 under the effect of the first transmission rod 26, and make the two brakes under the effect of the second transmission rod 27. The sheet 28 is separated from the transmission assembly, so that the transmission assembly can rotate normally. When people release the button 22, under the action of the second spring 24, the third sliding block 25 is pushed to move to the right, thereby passing through the two second transmission components. The rod 27 drives the two brake pads 28, so that the two brake pads 28 are against the transmission assembly, so that the transmission assembly cannot rotate;

As shown in Figure 5, the dustproof assembly includes a drive assembly, a first connecting rod 30, a second connecting rod 31 and a dustproof cover 35, one end of the first connecting rod 30 is arranged on the first shell 5, so The other end of the first connecting rod 30 is hinged to one end of the second connecting rod 31, the second connecting rod 31 is provided with a slot 32, and the dust cover 35 is arranged on the second connecting rod 31 close to the USB interface. 34, the drive assembly is arranged inside the first housing 5;

Wherein, the driving assembly drives the second connecting rod 31 to rotate around the hinge point with the first connecting rod 30, when the second connecting rod 31 rotates away from the first housing 5, the second connecting rod 31 drives the protective The cover 35 moves away from the USB interface 34, so that the USB interface 34 is exposed, so that people can charge. When the second connecting rod 31 rotates toward the direction close to the first shell 5, the protective cover is driven by the second connecting rod 31 35 moves towards the direction close to the USB interface 34, thereby covering the USB interface 34 through the protective cover 35, reducing the amount of dust entering the inside of the USB interface 34, and prolonging the service life of the USB interface 34.

As shown in Figure 4, the transmission assembly includes a first rotating wheel 19, a second rotating wheel 23 and a transmission belt 20, and one end of the screw mandrel 7 and the rotating shaft 12 are all arranged inside the second housing 8, and the first A rotating wheel 19 is arranged on an end of the screw mandrel 7, and the second rotating wheel 23 is arranged on an end of the rotating shaft 12, and the first rotating wheel 19 is connected with the second rotating wheel 23 by a transmission belt 20;

Wherein, when the rotating shaft 12 drives the second rotating wheel 23 to rotate, under the transmission effect of the transmission belt 20, the second rotating wheel 23 drives the first rotating wheel 19 to rotate, thereby driving the screw mandrel 7 to rotate through the first rotating wheel 19 .

As shown in Figure 2-3, the power supply assembly includes a charging head 13, a first spring 16, a sleeve 4, two ball screws 17 and two stoppers 14, and the sleeve 4 is set on the second slide Above the block 3, a card slot 18 is respectively provided on the inner walls of both sides of the sleeve 4, and a cavity 15 is provided inside the charging head 13, and an opening is respectively provided on both sides of the cavity 15, Two ball bead screws 17 are respectively arranged in two openings, and two stoppers 14 are respectively arranged on two bead screws 17, and two stoppers 14 are all arranged in the inside of cavity 15, and the first The spring 16 is arranged between two ball-ball screws 17, and the ball-ball screws 17 are matched with the card slot 18;

Among them, when people need to charge, they can directly pull out the charging head 13 from the inside of the sleeve 4. After the charging is completed, people only need to insert the charging head 13 into the inside of the sleeve 4. Next, the probability of the ball screw 17 falling from the inside of the cavity 15 is reduced, and then under the action of the first spring 16, the two ball screws 17 are pushed to move away from each other, so that the two ball screws 17 They are snapped into the two card slots 18 respectively, and the force of the card slots 18 on the ball screw 17 reduces the probability of the charging head 13 falling off from the inside of the sleeve 4, thereby realizing the retraction of the charging head 13.

As shown in Figure 5, the drive assembly includes a cylinder 29 and a drive block 33, one end of the cylinder 29 is set inside the first housing 5, the drive block 33 is set on the other end of the cylinder 29, the drive The block 33 is arranged inside the slot 32;

Wherein, the driving block 33 is driven to move left and right by the cylinder 29 , so that with the help of the driving block 33 and the slot 32 , the second connecting rod 31 is driven to rotate around the hinge point with the first connecting rod 30 by the driving block 33 .

Preferably, in order to reduce the volume of the cylinder 29, the cylinder 29 is a miniature cylinder.

As preferably, in order to drive the third sliding block 25 to move towards the direction close to the first rotating wheel 19, the second spring 24 is in a compressed state, and when the second spring 24 is in a compressed state, the second spring 24 slides to the third The block 25 produces a rightward thrust, so that the two brake pads 28 can abut on the first rotating wheel 19 and the second rotating wheel 23 respectively.

Preferably, in order to improve the anti-slip effect of the brake pads 28, the material of the brake pads 28 is rubber. Since rubber has a better anti-skid effect, the anti-skid effect of the brake pads 28 is improved.

Preferably, in order to make the two ball screws 17 move away from each other, the first spring 16 is in a compressed state. A thrust is generated to push the two ball screws 17 to move away from each other.

As a preference, in order to improve the smoothness of the movement of the first sliding block 1, the outer surface of the screw rod 7 is also coated with a lubricant, which reduces the friction between the first sliding block 1 and the screw rod 7 , thereby improving the smoothness of the movement of the first slider 1 .

As a preference, in order to reduce the probability of slippage between the turntable 10 and the rotating shaft 12, a limit bar is also provided on the rotating shaft 12, and the turntable 10 can follow the rotation through the limit action of the limit bar on the turntable 10. The shaft 12 rotates, thereby reducing the chance of slipping between the rotating shaft 12 and the turntable 10 .

When people need to use the on-board charging equipment, people only need to connect the power supply assembly to the power supply port on the car. When people pull the power supply assembly, the rotating shaft 12 is pulled by the charging line 11 to rotate, so that the telescopic rope 9 can be turned by the turntable 10 Elongated, so that under the action of the transmission assembly, the screw rod 7 is driven to rotate through the rotating shaft 12, and then the first sliding block 1 is driven to move to the right through the screw rod 7, thereby driving the guide ring 1 to move to the right, thereby realizing charging The guiding function of the line 11, under the action of the guide rail 6, drives the second sliding block 3 to move to the right through the first sliding block 1, thereby driving the power supply assembly to move through the second sliding block 3, reducing the possibility of the charging line 11 being stuck. Chances are, when the charging line 11 is pulled to a certain length, under the action of the brake assembly, the rotating shaft 12 will stop rotating, so that the charging line 11 will remain at the current length. After the charging is completed, people only need to press the brake The component, under the action of the telescopic rope 9, pulls the rotating shaft 12 to rotate, so that the charging line 11 is wound on the rotating shaft 12 through the rotating shaft 12, and under the action of the transmission component, the screw rod 7 is driven to rotate through the rotating shaft 12, Therefore, under the action of the screw rod 7, the first sliding block 1 is driven to move to the left, so that under the action of the guide ring 2, the charging line 11 is wound around the rotating shaft 12 in an orderly manner from right to left, and the charging line 11 passes through The retractable and unwinding not only expands the charging range of the charging system, but also reduces the probability of the charging wires 11 being entangled together and improves the practicability of the charging system. The second connecting rod 31 is driven around the connection with the first connecting rod 30 through the driving assembly. When the hinge point rotates, when the second connecting rod 31 rotates to the direction away from the first shell 5, the protective cover 35 is driven by the second connecting rod 31 to move away from the USB interface 34, so that the USB interface 34 is exposed, so that people It can be charged. When the second connecting rod 31 rotates toward the direction close to the first shell 5, the second connecting rod 31 drives the protective cover 35 to move toward the direction close to the USB interface 34, thereby covering the USB interface 34 through the protective cover 35. live, reducing the amount of dust entering the USB interface 34 and prolonging the service life of the USB interface 34.

Compared with the prior art, the convenient on-board charging system for new energy vehicles not only expands the charging range of the charging system through the wire take-up mechanism, but also can store the charging wires 11 inside the charging system in an orderly manner. , thereby reducing the probability of the charging wires 11 being entangled together and improving the practicability of the charging system. In this way, the USB interface 34 can be protected by the dust-proof mechanism, which not only reduces the amount of dust entering the USB interface 34, but also reduces the probability of damage to the USB interface 34 during the use of the charging system, further improving the charging system. The practicability of the charging system, compared with the existing mechanism, the structure of the mechanism is simple, which reduces the probability of failure.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (10)

1. A convenient on-board charging system for new energy vehicles, characterized in that it comprises a first shell (5), a second shell (8), a USB interface (34), a wire take-up mechanism and a dustproof mechanism, so that The second casing (8) is arranged on one side of the first casing (5), the USB interface (34) is arranged below the first casing (5), and the wire take-up mechanism is arranged on the first casing (5) Inside, the dust-proof mechanism is arranged on the USB interface (34); The take-up mechanism includes a power supply assembly, a guide rail (6), a screw rod (7), a rotating shaft (12), a first sliding block (1), a guide ring (2), a second sliding block (3), a charging line (11), a transmission assembly, a brake assembly, two rotating disks (10) and two telescopic ropes (9), the rotating shaft (12) is horizontally arranged at the inner lower end of the first shell (5), and the two rotating disks (10) are respectively arranged on the two ends of the rotating shaft (12), and one end of the two telescopic ropes (9) is wound on the two rotating disks (10) respectively, and the other ends of the two telescopic ropes (9) are all arranged on the second On the lower end shell of a housing (5), the screw mandrel (7) is horizontally arranged above the rotating shaft (12), the guide rail (6) is horizontally arranged above the screw mandrel (7), and the first The inside of the sliding block (1) is provided with a through hole, the screw mandrel (7) passes through the first sliding block (1), the screw mandrel (7) is threadedly connected with the first sliding block (1), and the guide The ring (2) is arranged on the first sliding block (1), the inside of the second sliding block (3) is provided with a through hole, the guide rail (6) passes through the second sliding block (3), and the second sliding block (3) passes through the second sliding block (3). A sliding block (1) is fixedly connected to the second sliding block (3), the power supply assembly is arranged above the second sliding block (3), and one end of the charging line (11) is wound around the rotating shaft (12) The other end of the charging line (11) passes through the guide ring (2) and is connected to the power supply assembly, and one end of the screw rod (7) and the rotating shaft (12) are both arranged inside the second housing (8) , one end of the transmission assembly is connected to one end of the screw rod (7), the other end of the transmission assembly is connected to the rotating shaft (12), and the braking assembly is arranged in the middle of the second housing (8); The brake assembly includes a support rod (21), a second spring (24), a third sliding block (25), a first transmission rod (26), a button (22), two second transmission rods (27) and Two brake pads (28), the support rod (21) is horizontally arranged in the middle part of the second casing (8), the inside of the third sliding block (25) is provided with a through hole, the support rod (21 ) through the third sliding block (25), the second spring (24) is sleeved on the support rod (21) near the end of the first shell (5), and one end of the second spring (24) is set On the third sliding block (25), the other end of the second spring (24) is arranged on the inner wall of the second housing (8), and one end of the two second transmission rods (27) is respectively arranged on the third sliding Above and below the block (25), two brake pads (28) are respectively arranged on the other ends of the two second transmission rods (27), and the two brake pads (28) are respectively against the first rotating wheel (19) and the second rotating wheel (23), one end of the first transmission rod (26) is arranged on the third sliding block (25), and the other end of the first transmission rod (26) is arranged on the second The outside of the second shell (8), the button (22) is arranged on the other end of the first transmission rod (26); The dustproof assembly includes a drive assembly, a first connecting rod (30), a second connecting rod (31) and a dustproof cover (35), and one end of the first connecting rod (30) is arranged on the first casing (5 ), the other end of the first connecting rod (30) is hinged with one end of the second connecting rod (31), the second connecting rod (31) is provided with a slot (32), the dust cover (35) is arranged on the side of the second connecting rod (31) close to the USB interface (34), and the drive assembly is arranged inside the first shell (5). 2. The convenient on-board charging system for new energy vehicles according to claim 1, characterized in that, the transmission assembly includes a first rotating wheel (19), a second rotating wheel (23) and a transmission belt (20) , one end of the screw mandrel (7) and the rotating shaft (12) is arranged inside the second housing (8), the first rotating wheel (19) is arranged on one end of the screw mandrel (7), the The second rotating wheel (23) is arranged on one end of the rotating shaft (12), and the first rotating wheel (19) is drivingly connected with the second rotating wheel (23) through a transmission belt (20). 3. The convenient on-board charging system for new energy vehicles as claimed in claim 1, wherein the power supply assembly includes a charging head (13), a first spring (16), a sleeve (4), two A bead screw (17) and two limit blocks (14), the sleeve (4) is arranged above the second sliding block (3), and the inner walls on both sides of the sleeve (4) are respectively provided There is a card slot (18), the interior of the charging head (13) is provided with a cavity (15), and the two sides of the cavity (15) are respectively provided with an opening, and the two wave bead screws (17) are respectively Set in the two openings, the two limit blocks (14) are respectively set on the two ball screws (17), the two limit blocks (14) are all set inside the cavity (15), the first A spring (16) is arranged between two ball-ball screws (17), and the ball-ball screws (17) are matched with the card slot (18). 4. The convenient on-board charging system for new energy vehicles as claimed in claim 1, characterized in that, the drive assembly includes a cylinder (29) and a drive block (33), and one end of the cylinder (29) is provided with Inside the first casing (5), the drive block (33) is arranged on the other end of the cylinder (29), and the drive block (33) is arranged inside the slot (32). 5. The convenient on-board charging system for new energy vehicles as claimed in claim 5, characterized in that the cylinder (29) is a miniature cylinder. 6. The convenient on-board charging system for new energy vehicles according to claim 1, characterized in that the second spring (24) is in a compressed state. 7. The convenient on-board charging system for new energy vehicles according to claim 1, characterized in that the brake pad (28) is made of rubber. 8. The convenient on-board charging system for new energy vehicles according to claim 3, characterized in that the first spring (16) is in a compressed state. 9. The convenient on-board charging system for new energy vehicles according to claim 1, characterized in that, the outer surface of the screw rod (7) is also coated with lubricant. 10. The convenient on-board charging system for new energy vehicles according to claim 1, characterized in that, a limit bar is further provided on the rotating shaft (12).