A gun head pop-off charging gun

Abstract

The application discloses a gun head bullet separation type charging gun and belongs to the technical field of charging guns. The gun head bullet separation type charging gun comprises a gun head shell, the rear end of the gun head shell is provided with a handle, the rear end of the handle is provided with a base, the front side of the inner wall of the gun head shell is slidably connected with a plug through a plurality of sliding blocks, the rear end of the plug is connected with a flexible connecting line, the end of the flexible connecting line is provided with a control module, the rear side of the control module is provided with an electric wire, an ejection assembly is arranged between the gun head shell and the control module, the outer circumferential side of the gun head shell is provided with a protection assembly, when a vehicle drives away and the charging gun is not pulled out, the plug is quickly separated from the vehicle under the action of the ejection assembly, meanwhile, the protection assembly protects and buffers the falling charging gun, and the service life of the charging gun is prolonged.

Description

Technical Field

[0001] This invention relates to a gun head ejection type charging gun, belonging to the field of charging gun technology. Background Technology

[0002] A charging gun, also known as a vehicle charging gun, is used to charge electric vehicles. It is an important component of new energy charging stations. When using a charging station, users only need to insert the charging gun into the car's charging port and then operate the charging station to start charging.

[0003] Currently, while conventional new energy vehicle charging stations can adjust the charging speed according to the vehicle model and needs, even in fast charging mode, it still takes a certain amount of time to fully charge a car. Furthermore, the charging process does not require any additional manual operation, which can easily cause drivers to become drowsy or forget about the charging process and focus on other things. Once charging is complete, the charging time is over, or the driver encounters an emergency, there is a high possibility that the driver will drive away without unplugging the charging gun. Since the charging gun is equipped with a locking device, when the vehicle leaves, the locking device is still engaged, and the charging gun cannot be detached from the vehicle, which can easily damage the charging gun or even cause a serious safety accident.

[0004] For example, Chinese invention patent CN108718019A discloses a gun-head ejection type charging gun, including a gun body with an inner cavity, a plug, a locking component, and a wiring harness. The locking component is rotatably mounted on the gun body. The left end of the locking component has a downward-protruding latch and an arc-shaped boss. The gun body has a slider that can slide out of the gun body to the left. The slider is located on the right side of the arc-shaped boss and contacts the arc-shaped boss. The gun body has a horizontally set ejector rod that can slide out of the gun body to the left. The slider is connected to the ejector rod. The gun body has a wedge-shaped block that slides perpendicular to the length of the ejector rod. The ejector rod has a groove, and a first spring is fitted onto the wedge-shaped block. Under the elastic force of the first spring, the wedge-shaped end of the wedge-shaped block slides into the groove. The ejector rod is connected to the gun body via a storage spring. A plug-in sleeve is slidably inserted into the gun body. There is a pull rope in the inner cavity. One end of the pull rope is connected to the wedge-shaped block, and the other end of the pull rope is connected to the plug-in sleeve. A wire harness is fixedly connected to the plug-in sleeve, and one end of the wire harness is placed in the inner cavity and connected to the plug.

[0005] The above solution has the following shortcomings in practical use:

[0006] If the gun head is held in place by the spring preload alone, it is prone to axial retraction if it is touched by an external force during the charging process, which may lead to charging interruption or poor contact.

[0007] The fixed structure and the spring-off mechanism work independently, which can easily lead to contradictions such as fixed failure causing retraction or separation lag causing dragging. The failure rate increases significantly in low temperature or high humidity environments. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the present invention provides a gun head ejection type charging gun, which achieves the functions of rapid separation, equipment protection and wire protection when a vehicle is accidentally driven away, by combining ejection component and electromagnetic technology, multi-level buffer protection structure and wire elastic constraint design.

[0009] The technical solution adopted by this invention to solve its technical problem is:

[0010] A type of charging gun with a ejector head includes a gun head housing, a handle at the rear end of the gun head housing, a base at the rear end of the handle, a plug slidably connected to the front side of the inner wall of the gun head housing via several sliders, a flexible connecting wire connected to the rear end of the plug, a control module at the end of the flexible connecting wire, an electrical wire at the rear side of the control module, an ejector assembly between the gun head housing and the control module, and a protective assembly on the outer periphery of the gun head housing. When the vehicle drives away without the charging gun being removed, the ejector assembly causes the plug to quickly separate from the vehicle, while the protective assembly cushions the falling charging gun.

[0011] Preferably, a ring-shaped electromagnet is provided on the front side of the inner wall of the gun head housing, and a second iron ring corresponding to the ring-shaped electromagnet is provided on the rear side of the outer circumference of the plug.

[0012] Preferably, the ejection assembly includes an iron ring one, with drive plates on both sides of the iron ring one. The inner wall of the gun head housing has two mounting slots, and the drive plates are respectively disposed in the mounting slots. Push plates are slidably connected to the inner walls of the mounting slots. The front end of the gun head housing has two through holes communicating with the mounting slots. The two push plates pass through the through holes and are fitted with push rings. A suction cup is disposed on the front side of the push rings. A ring electromagnet two corresponding to the iron ring one is disposed on the rear side of the inner wall of the gun head housing.

[0013] Preferably, one side of the drive plate has several toothed grooves, and the drive plate is connected to a transmission gear through several toothed grooves. The transmission gear is rotatably connected to the inner wall of the mounting groove through a rotating shaft. One side of the push plate has several toothed grooves corresponding to the transmission gear.

[0014] Preferably, two reinforcing plates are provided on the rear side of the push ring, and two guide grooves corresponding to the reinforcing plates are provided on the front end of the gun head housing.

[0015] Preferably, the protective component includes an airbag located between an iron ring and an annular electromagnet, and the airbag is provided with a plurality of air guide tubes, the ends of which extend out of the gun head housing and are provided with a buffer airbag.

[0016] Preferably, the buffer airbag includes at least two buffer bladders, and adjacent buffer bladders are connected by a pipe.

[0017] Preferably, a ring electromagnet is embedded in the end of the handle, an iron ring is provided on the rear side of the ring electromagnet, a connecting ring is provided on the outer periphery of the wire, the connecting ring is located in the base, and a spring is provided between the connecting ring and the iron ring.

[0018] Preferably, a spring is provided between the plug and the control module, and a guide ring for guiding the wire is provided on the front side of the inner wall of the handle.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The attraction force between the ring electromagnet one and the iron ring two is much greater than that of external interference, such as a 50N touch force. During the charging process, the axial retraction of the plug is ≤0.5mm, which is a significant improvement over the traditional structure. The electromagnetic fixation is an active locking mechanism, and even in low-temperature environments, the fixing force decays little, ensuring stable contact pressure between the plug and the vehicle charging port and eliminating the risk of electric arc.

[0021] The three-stage separation mechanism of electromagnetic de-energization, spring drive, and gear ejection has a short time from triggering to complete separation, avoiding deformation of the gun body caused by vehicle dragging;

[0022] The multiple buffer bladders reduce the damage rate of internal components when the charging gun is dropped from a height of 1.2 meters from 30% to 3%, and the elastic constraint design of the wire reduces the probability of wire core breakage and extends service life. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a longitudinal sectional view of the entire invention;

[0026] Figure 3 This is a cross-sectional view of the entire invention;

[0027] Figure 4 This is a schematic diagram of the structure of the gun head shell, handle, and base of the present invention;

[0028] Figure 5 This is a partial structural schematic diagram of the ejection assembly of the present invention;

[0029] Figure 6 This is an exploded view of the protective component of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the wire of the present invention;

[0031] Figure 8 This is a structural exploded view of the spring at two points in this invention.

[0032] In the diagram: 1. Gun head housing; 2. Handle; 3. Base; 4. Slider; 5. Plug; 6. Flexible connecting wire; 7. Control module; 8. Spring 1; 9. Iron ring 1; 10. Mounting slot; 11. Drive plate; 12. Gear 1; 13. Transmission gear; 14. Push plate; 15. Gear 2; 16. Push ring; 17. Suction cup; 18. Reinforcing plate; 19. Guide groove; 20. Through hole; 21. Ring electromagnet 1; 22. Iron ring 2; 23. Ring electromagnet 2; 24. Airbag; 25. Air duct; 26. Buffer bag; 27. Pipe; 28. Guide ring; 29. ​​Wire; 30. Ring electromagnet 3; 31. Iron ring 3; 32. Connecting ring; 33. Spring 2. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1-8 The present invention provides a technical solution:

[0035] like Figures 1-3As shown, a head-removing charging gun includes a head shell 1 made of PC and ABS alloy with a wall thickness of 10mm. A one-piece molded handle 2 is located at the rear end, with a length of 140mm and a diameter of 38mm. The surface of the handle 2 has anti-slip textures with a depth of 0.5mm. The rear end is connected to a base 3 via a snap-fit. Four slide rails are symmetrically arranged axially along the inner wall of the head shell 1. The slide rails have a T-shaped cross-section. Four sliders 4 are installed on both sides of the plug 5. The sliders 4 are made of polyoxymethylene, and the clearance between them and the slide rails is ≤0.1mm. mm, ensuring that the plug 5 can only slide along the axial direction, so that the radial offset is ≤0.2mm. The rear end of the plug 5 is connected to a flexible connecting line 6. The end of the flexible connecting line 6 is provided with a control module 7. The rear side of the control module 7 is provided with a wire 29. An ejection assembly is provided between the gun head housing 1 and the control module 7. A protective assembly is provided on the outer periphery of the gun head housing 1. When the vehicle drives away and the charging gun is not pulled out, the ejection assembly causes the plug 5 to quickly separate from the vehicle, while the protective assembly protects and buffers the falling charging gun.

[0036] Furthermore, a 5mm diameter positioning pin is provided at the front end of the plug 5, which cooperates with the positioning hole of the vehicle charging port to further limit radial sway. A spring 8 is provided between the plug 5 and the control module 7. The spring 8 is made of 60Si2Mn, with a diameter of 15mm, a free length of 60mm, a stiffness coefficient of 10N / mm, and a pre-compression amount of 12mm and a pre-tightening force of 120N in its natural state. When the annular electromagnet 21 is de-energized, the spring 8 pulls the plug 5 to slide backward along the slider 4. A guide ring 28 is provided on the front side of the inner wall of the handle 2 to guide the wire 29. The guide ring 28 is made of polytetrafluoroethylene. The wire 29 passes through the guide ring 28 and connects to the control module 7.

[0037] like Figure 4 As shown, a ring electromagnet 21 is provided on the front side of the inner wall of the gun head housing 1. The ring electromagnet 21 has an outer diameter of 60mm, an inner diameter of 45mm, and a suction force of ≥180N. A corresponding iron ring 22 is provided on the rear side of the outer circumference of the plug 5. The iron ring 22 is made of DT4 pure iron with a thickness of 3mm. The distance between the iron ring 22 and the ring electromagnet 21 is ≤1mm. When charging or removing the charging gun from the charging station, the ring electromagnet 21 is energized to generate magnetic force, attracting the iron ring 22 and firmly fixing the plug 5 in the working position to prevent retraction.

[0038] like Figures 5-6As shown, the ejector assembly includes an iron ring 9, with drive plates 11 on both sides of the iron ring 9. The drive plates 11 are made of 20 steel and are 2mm thick. Two mounting grooves 10 are formed on the inner wall of the gun head housing 1. Each mounting groove 10 is 100mm long and 12mm deep. The drive plates 11 are respectively positioned within the mounting grooves 10. Push plates 14 are slidably connected to the inner walls of each mounting groove 10. Two through holes 20 are formed at the front end of the gun head housing 1, communicating with the mounting grooves 10. The two push plates 14 pass through the through holes 20 and are fitted with push rings 16. The push rings 16 have a diameter of 45mm. The device has a ring structure and a suction cup 17 on the front side of the push ring 16. The suction force of the suction cup 17 is ≥25N, which is used to improve the stability of the charging gun during charging and to assist in pushing the charging port of the vehicle during separation to prevent the charging gun from bouncing. The rear side of the inner wall of the gun head housing 1 is provided with a ring electromagnet 23 corresponding to the iron ring 9. The attraction force of the ring electromagnet 23 corresponding to the iron ring 9 is ≥150N. When the ring electromagnet 21 is de-energized, power is supplied to the ring electromagnet 23 to speed up the movement speed of the control module 7 and increase the separation speed of the charging gun from the vehicle.

[0039] Furthermore, a plurality of toothed grooves 12 are provided on one side of the drive plate 11. The module of the toothed grooves 12 is 0.8 and the number of teeth is 35. The drive plate 11 is connected to a transmission gear 13 through the toothed grooves 12. The transmission gear 13 has a module of 0.8 and a number of teeth is 16. The transmission gear 13 is rotatably connected to the inner wall of the mounting groove 10 through a rotating shaft. A plurality of toothed grooves 15 corresponding to the transmission gear 13 are provided on one side of the push plate 14. The module of the toothed grooves 15 is 0.8 and the number of teeth is 35.

[0040] Furthermore, two reinforcing plates 18 are provided on the rear side of the push ring 16. The thickness of the reinforcing plate 18 is 2.5mm. A guide groove 19 with a length of 40mm is opened at the front end of the gun head housing 1. The gap between the reinforcing plate 18 and the guide groove 19 is ≤0.3mm to ensure that the axial movement of the push ring 16 is without deviation.

[0041] It should be noted that the control module 7 has a built-in STM32F407 microcontroller. It is connected to the ring electromagnet 21 and the ring electromagnet 23 and the current sensor through wires to detect the charging circuit current. When the gun is removed and charging is performed, the ring electromagnet 21 is powered on to fix the plug 5. When the plug is separated, the ring electromagnet 21 is de-energized and the ring electromagnet 23 is de-energized to trigger the pop-out.

[0042] like Figure 6 As shown, the protective component includes an airbag 24, which is located between the iron ring 9 and the annular electromagnet 23. The airbag 24 is made of nitrile rubber and has a volume of 80mL. It is connected to the buffer airbag on the outer periphery of the gun head housing 1 through three air guide tubes 25 with a diameter of 4mm, forming an annular buffer zone.

[0043] Furthermore, the cushioning airbag includes at least two cushioning bladders 26 with a diameter of 35 mm, and adjacent cushioning bladders 26 are connected by a pipe 27 with a diameter of 2 mm.

[0044] like Figures 7-8 As shown, a ring electromagnet 30 is embedded in the end of the handle 2. An iron ring 31 is provided on the rear side of the ring electromagnet 30. A connecting ring 32 is provided on the outer periphery of the wire 29. The connecting ring 32 is located in the base 3. A spring 33 is provided between the connecting ring 32 and the iron ring 31. The diameter of the spring 33 is 8mm and the spring constant is 4N / mm, which realizes the elastic constraint of the wire and avoids dragging damage when separating. When the vehicle drives away and the charging gun is not pulled out, the control module 7 stops supplying power to the ring electromagnet 30. At this time, as the vehicle pulls on the wire 29, the wire 29 drives the push-out component to work, further accelerating the disengagement of the plug 5.

[0045] The workflow of this embodiment is as follows: After the plug 5 is taken out of the charging station, the control module 7 detects the contact signal and simultaneously powers the annular electromagnet 21 and the annular electromagnet 30. The annular electromagnet 21 attracts the iron ring 22, which firmly fixes the plug 5 with an axial locking force ≥180N. Even if subjected to a 50N axial tension, there is no retraction. The annular electromagnet 30 attracts the iron ring 31, the spring 23 is pre-compressed, and the wire 29 is in a taut state.

[0046] When the vehicle accidentally drives away, causing the tension on the wire 29 to exceed the threshold of 80N, the control module 7 immediately cuts off the power supply to the annular electromagnet 21 to attract the iron ring 22, and supplies power to the annular electromagnet 23 to attract the iron ring 9. Under the attraction and the tension of the wire 29, the control module 7 drives the spring 8 and the plug 5 to retract. At the same time, under the transmission of the drive plate 11 and the push plate 14, the push ring 16 begins to move and push the plug 5 to separate from the vehicle's charging port. This can effectively shorten the movement of the plug 5 to achieve separation from the vehicle and speed up the separation speed of the plug 5 from the vehicle. As the iron ring 31 approaches the annular electromagnet 30, it squeezes the airbag 24 under the action of attraction, causing the air in the airbag 24 to be injected into multiple buffer bags 26, causing the buffer bags 26 to expand. When the charging gun falls to the ground, the buffer bags 26 can effectively cushion the charging gun.

[0047] When the charging gun is separated from the vehicle or after 5 minutes, the control module 7 stops supplying power to the annular electromagnet 30 and supplies power to the annular electromagnet 21 to attract the iron ring 22. At the same time, the iron ring 31 and the plug 5 are reset under the pull of the spring 23, so that the user can use them again.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A head-removing charging gun, comprising a head housing (1), a handle (2) provided at the rear end of the head housing (1), and a base (3) provided at the rear end of the handle (2), characterized in that, The front side of the inner wall of the gun head housing (1) is slidably connected to a plug (5) by several sliders (4). The rear end of the plug (5) is connected to a flexible connecting line (6). The end of the flexible connecting line (6) is provided with a control module (7). The rear side of the control module (7) is provided with a wire (29). An ejection assembly is provided between the gun head housing (1) and the control module (7). A protective assembly is provided on the outer periphery of the gun head housing (1). When the vehicle drives away and the charging gun is not pulled out, the plug (5) is quickly separated from the vehicle under the action of the ejection assembly, and the protective assembly protects and buffers the falling charging gun. The ejection assembly includes an iron ring (9), with drive plates (11) on both sides of the iron ring (9). The inner wall of the gun head housing (1) has two mounting slots (10), and the drive plates (11) are respectively installed in the mounting slots (10). The inner wall of each mounting slot (10) is slidably connected with a push plate (14). The front end of the gun head housing (1) has two through holes (20) that communicate with the mounting slots (10). The two push plates (14) pass through the through holes (20) and are fitted with push rings (16). The front side of the push rings (16) is provided with a suction cup (17). The rear side of the inner wall of the gun head housing (1) is provided with a ring electromagnet (23) corresponding to the iron ring (9). The handle (2) has a ring electromagnet (30) embedded in its tail end. A ring iron ring (31) is provided on the rear side of the ring electromagnet (30). A connecting ring (32) is provided on the outer periphery of the wire (29). The connecting ring (32) is located inside the base (3). A spring (33) is provided between the connecting ring (32) and the ring iron ring (31).

2. The gun head ejection type charging gun according to claim 1, characterized in that, A ring electromagnet one (21) is provided on the front side of the inner wall of the gun head housing (1), and an iron ring two (22) corresponding to the ring electromagnet one (21) is provided on the rear side of the outer circumference of the plug (5).

3. The head-disengagement charging gun according to claim 1, characterized in that, The drive plate (11) has several toothed grooves (12) on one side. The drive plate (11) is connected to a transmission gear (13) through several toothed grooves (12). The transmission gear (13) is rotatably connected to the inner wall of the mounting groove (10) through a rotating shaft. The push plate (14) has several toothed grooves (15) on one side that correspond to the transmission gear (13).

4. A gun head ejection type charging gun according to claim 1, characterized in that, Two reinforcing plates (18) are provided on the rear side of the push ring (16), and two guide grooves (19) corresponding to the reinforcing plates (18) are opened at the front end of the gun head housing (1).

5. A gun head ejection type charging gun according to claim 1, characterized in that, The protective component includes an airbag (24), which is located between an iron ring (9) and an annular electromagnet (23). The airbag (24) is provided with a plurality of air guide tubes (25), and the ends of the plurality of air guide tubes (25) extend out of the gun head housing (1) and are provided with buffer airbags.

6. A head-disengagement charging gun according to claim 5, characterized in that, The buffer airbag includes at least two buffer bladders (26), and two adjacent buffer bladders (26) are connected by a pipe (27).

7. A gun head ejection type charging gun according to claim 1, characterized in that, A spring (8) is provided between the plug (5) and the control module (7), and a guide ring (28) for guiding the wire (29) is provided on the front side of the inner wall of the handle (2).

Images