A safety charging device applicable to electric vehicles

Abstract

The present invention belongs to the technical field of electric vehicles, and particularly relates to a safe charging device suitable for electric vehicles. It includes a semi-circular plug, a connector, a handle, and a limit block. In the present invention, a speed-type damper is used to identify the above two situations, and determining the locking degree of each situation has a strong practical effect. When the charging device is subjected to a sudden impact force, such as someone accidentally tripping over the wire of the charging device, the charging device will not disconnect from the electric vehicle, which can prevent gaps from appearing between the components that are nested and matched with each other between the charging device and the electric vehicle, causing sparks and damaging the charging device and the electric vehicle. After the electric vehicle is fully charged and people drive away the electric vehicle without unplugging the charging device, the charging device can prevent the components that are nested and matched with each other between the charging device and the electric vehicle from being damaged by tension, especially when the electric vehicle pulls the charging pile through the wire and causes damage to it.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric vehicles, and particularly relates to a safe charging device suitable for electric vehicles. Background Art

[0002] An electric vehicle refers to a vehicle powered by an on-vehicle power source and driven by an electric motor to run on wheels, meeting the requirements of road traffic and safety regulations. Due to its relatively smaller impact on the environment compared to traditional vehicles, its prospects are widely optimistic. Among them, electric vehicles have special charging devices to ensure sufficient power for use.

[0003] During charging, if someone accidentally trips over the wire of the charging device and gives an instantaneous impact to the charger, two situations may occur. One is that the wire is pulled, but because the acting force is small and the wire is thick, there will be no significant impact; the second is that the plug is pulled out. Since the current of general electric vehicles is large, if the plug becomes loose, it may cause a spark and lead to an accident. In view of this situation, it is hoped that the plug can be inserted tightly and is not easy to loosen.

[0004] During charging, there is also a small-probability event. That is, after charging is completed, if people do not notice and directly drive away, the wire will be pulled. Because the acting force is large, generally a plug that is inserted tightly will be pulled out. However, the plug is pulled out because the wire transmits a large force, so the wire will inevitably be subjected to a large pulling force and will surely be affected; if the plug is not pulled out, it may cause the wire to pull the charging pile, resulting in damage to the charging pile. In view of this situation, it is hoped that the plug can be inserted loosely and is easy to disconnect.

[0005] The above two situations have a certain degree of contradiction. One requires not being easy to loosen, and the other requires being extremely easy to loosen.

[0006] The present invention designs a safe charging device suitable for electric vehicles to solve the above contradictions. Summary of the Invention

[0007] To solve the above-mentioned defects in the prior art, the present invention discloses a safe charging device suitable for electric vehicles, which is implemented by the following technical solutions.

[0008] A safe charging device suitable for electric vehicles includes a semi-circular plug, a connector, a handle, and a limit block. The front end of the connector has a semi-circular plug with a jack. The rear end of the connector is installed with a handle. Its characteristics are as follows: A velocity-type damper is installed inside the connector, and a first spring is installed between the housing of the velocity-type damper and the connector; one end of an elastic plate is fixedly installed at the front end of the connector, and the limit block is fixedly installed on the elastic plate; two blocks are symmetrically and slidably installed on the front side of the connector and slide below the limit block, and the two blocks are fixedly connected to the housing of the velocity-type damper.

[0009] One end of the above-mentioned handle is swingably installed with a rotating shell, and the rotating shell is rotatably installed at the rear end of the joint; the I-shaped sleeve is slidably installed in the handle, and a second spring is installed between the I-shaped sleeve and the handle; one end of the wire is connected to the input end in the semi-circular plug, and the other end of the wire passes through the joint and the handle, and finally passes out of the outside of the handle and is connected to the output end of the charging pile. The wire passes through the I-shaped sleeve and is bonded to the I-shaped sleeve; a rubber sleeve is fixedly installed on the outer circumferential surface of the wire connected to the charging pile outside the handle. One end of the rubber sleeve has an annular disc, and the end of the rubber sleeve with the annular disc is inserted into the handle and is engaged with the I-shaped sleeve; a first fixing disc and a second fixing disc are fixedly installed on the wire. The first fixing disc rotates inside the joint near one end of the handle, and the second fixing disc is located inside the handle near one end of the joint; when not being pulled normally, the wire between the first fixing disc and the second fixing disc is in a slack state, and the wire between the second fixing disc and the annular disc on the rubber sleeve is in a slack state.

[0010] The inner rod of the above-mentioned speed damper is connected to one end of the I-shaped sleeve near the second fixing disc through a first pull rope.

[0011] A limiting mechanism for restricting whether the handle and the rotating shell swing is installed at the rear side of the above-mentioned handle. When the wire passing out of the outside of the handle is triggered and pulled backward, the wire squeezes the trigger limiting mechanism through the rubber sleeve on the outer circumferential surface, so that the swinging function of the handle and the rotating shell is turned on.

[0012] As a further improvement of the present technology, a first installation cavity is opened inside the above-mentioned joint. One end of the first installation cavity is opened with a sliding cavity, and one end of the sliding cavity is opened with a first rope hole passing through the joint. The other end of the first installation cavity is opened with a sliding groove, and one end of the sliding groove is opened with two symmetrically distributed square holes; the speed damper is installed in the first installation cavity, and the inner rod of the speed damper is located in the sliding cavity. The first pull rope connected to the output end of the speed damper passes through the first rope hole; one end of the first spring is fixedly installed on the shell of the speed damper, and the other end of the first spring is fixedly installed on the end surface of the first installation cavity; the U-shaped plate is slidably installed in the sliding groove, and the U-shaped plate is fixedly connected to the speed damper through a connecting plate. The two protruding ends of the U-shaped plate pass through the two square holes and are located outside the joint. Two clamping blocks are respectively fixedly installed on the two protrusions at one end of the U-shaped plate located outside the joint and are located below the limiting clamping block; when the inner rod of the speed damper is slowly pulled out, the shell of the speed damper is stationary under the action of the first spring, and the two clamping blocks are located in front of the limiting clamping block installed on the joint; when the inner rod of the speed damper is quickly pulled out, the shell of the speed damper is pulled and slides toward the side where the first spring is installed due to the increase in damping force, and the two clamping blocks slide to the lower sides of both ends of the limiting clamping block installed on the joint.

[0013] As a further improvement of the present technology, a second wire installation hole is opened at the upper end of the above-mentioned handle. A second installation cavity is opened at the lower end of the second wire installation hole. A third installation cavity is opened at the lower end of the second installation cavity. A fourth installation cavity is opened at the lower side of the third installation cavity. One end of the fourth installation cavity communicates with the third installation cavity, and the other end of the fourth installation cavity communicates with the outside of the handle; the second fixing disk is matched with the upper end surface of the second installation cavity; a through second rope hole is also opened between the upper end of the handle and the third installation cavity.

[0014] The above-mentioned I-shaped sleeve is composed of a first disk, a connecting sleeve and a second disk. The first disk and the second disk are respectively installed at the upper and lower ends of the connecting sleeve. The first disk is located in the third installation cavity, and the second disk is located in the fourth installation cavity. The upper end of the second spring is fixedly installed on the upper end surface of the third installation cavity, and the lower end of the second spring is fixedly installed on the lower end surface of the third installation cavity; the wire passes through and is bonded to the first disk, the connecting sleeve and the second disk.

[0015] One end of the above-mentioned rubber sleeve located inside the handle is fixedly installed with a U-shaped disk. The annular disk is fixedly installed at the upper end of the U-shaped disk. The annular disk is located in the fourth installation cavity. The second disk of the I-shaped sleeve is nested inside the U-shaped disk and is limited by the annular disk; the upper end of the third spring is fixedly installed on the lower end surface of the annular disk, and the lower end of the third spring is fixedly installed on the lower end surface of the fourth installation cavity.

[0016] One end of the above-mentioned first pull rope connected to the I-shaped sleeve passes through the second rope hole.

[0017] When not being pulled normally, the wire located in the above-mentioned second installation cavity is in a relaxed state.

[0018] As a further improvement of the present technology, a fifth installation cavity is opened inside the above-mentioned joint. First wire installation holes are opened at both ends of the fifth installation. The first wire installation hole close to the semi-circular plug communicates with the semi-circular plug, and the other first wire installation hole communicates with one end of the joint close to the handle; a second limiting groove is opened in the first wire installation hole close to the semi-circular plug, and a first limiting groove is opened in the first wire installation hole close to the handle. The third fixing disk is fixedly installed in the third limiting groove, and the first fixing disk is rotatably installed in the first limiting groove; the wire between the first fixing disk and the third fixing disk is in a relaxed state.

[0019] As a further improvement of the present technology, two annular grooves are opened on the outer circumferential surface of one end of the above-mentioned joint close to the handle. A plurality of card slots are circumferentially and evenly opened on the outer circumferential surface of the joint located between the two annular grooves. Two annular blocks are installed on the inner circumferential surface of the rotating shell. A plurality of elastic protrusions are circumferentially and evenly installed on the inner circumferential surface of the rotating shell located between the two annular blocks. The rotating shell is installed at one end of the joint far from the semi-circular plug through the rotational cooperation of the two annular blocks and the two annular grooves; the elastic protrusions installed on the rotating shell are in one-to-one correspondence and cooperation with the card slots opened on the joint.

[0020] As a further improvement of the present technology, the upper end of the above-mentioned handle has lugs, and the handle is hinged and installed with the rotating shell through the lugs.

[0021] As a further improvement of the present technology, the second guide roller is fixedly installed in the above-mentioned rotating shell through the first support, the third guide roller is installed in the rotating shell through the third support, and the second guide roller and the third guide roller guide the first pull rope entering the rotating shell; the first guide roller is installed in the rotating shell through the second support, and the first guide roller guides the electric wire entering the rotating shell. The above-mentioned first guide roller, second guide roller and third guide roller appear in pairs; the third guide roller is located at the axis of the hinge between the handle and the rotating shell.

[0022] A partition for isolating the electric wire and the first pull rope is installed in the above-mentioned rotating shell.

[0023] As a further improvement of the present technology, two stoppers are symmetrically installed on both sides of the above-mentioned rotating shell.

[0024] As a further improvement of the present technology, two third limiting grooves are symmetrically opened on the lower side of the rear end of the above-mentioned rotating shell.

[0025] The above-mentioned limiting mechanism includes a first mounting shell, a trigger plate, a second mounting shell, a mounting rod, a limiting plate, a fourth spring, a second pull rope, an arc-shaped pull block, and a leaf spring. A swinging notch is opened at the lower end of the first mounting shell, and the first mounting shell is fixedly installed on the outer circular surface of the lower end of the handle. The second mounting shell is fixedly installed on the outer circular surface of the upper end of the handle. A mounting rod is installed between the first mounting shell and the second mounting shell. A through third rope hole is opened between the first mounting shell, the second mounting shell and the mounting rod. One end of the arc-shaped pull block is installed in the first mounting shell through a fixed shaft. One end of the trigger plate is installed on the arc-shaped pull block, and the other end of the trigger plate passes through the swinging notch on the first mounting shell and is located outside the first mounting shell. The trigger plate cooperates with the electric wire located outside the handle; the limiting plate is of a U-shaped structure and is slidably installed in the second mounting shell. A fourth spring is installed between the lower end of the limiting plate and the bottom surface of the second mounting shell. The lower end of the limiting plate is connected to the upper end of the arc-shaped pull block through a second pull rope, and the second pull rope passes through the third pull rope hole; a leaf spring is installed between the end of the trigger plate located in the first mounting shell and the first mounting shell.

[0026] The two protrusions at the upper end of the above-mentioned limiting plate cooperate with the two third limiting grooves opened on the rotating shell.

[0027] As a further improvement of the present technology, an avoidance notch is opened at the rear end of the above-mentioned rotating shell.

[0028] Compared with the traditional electric vehicle technology, the beneficial effects of the design of the present invention are as follows:

[0029] 1. In the present invention, the two situations described in the background are identified by the velocity damper, and determining the locking degree of each situation has strong practical effects.

[0030] 2. In the present invention, when the charging device is subjected to a sudden impact force by the velocity damper, for example, when someone accidentally stumbles on the wire of the charging device, at this time, the wire of the charging device will be pulled to drive the velocity damper through the rubber sleeve, I-shaped sleeve and the first pull rope. Due to the large damping force, the velocity damper will drive the two clamping blocks to slide, so that the two clamping blocks limit the swing of the limit clamping block, that is, the limit clamping block that plays a clamping role will not disengage from the protrusion that plays a clamping role on the electric vehicle after being pulled, that is, the charging device will not disengage from the electric vehicle when it is subjected to a sudden impact force, and it can prevent gaps from appearing between the mutually nested and matched parts of the charging device and the electric vehicle, causing sparks and damaging the charging device and the electric vehicle.

[0031] 3. After the electric vehicle is charged, people drive away the electric vehicle without unplugging the charging device. Since the starting speed of most vehicles is slow, the charging device is subjected to a slow pulling force. At this time, the wire of the charging device will be pulled to drive the velocity damper through the rubber sleeve, I-shaped sleeve and the first pull rope. At this time, the inner rod of the velocity damper will be pulled, and due to the small damping force of the velocity damper, its housing is basically stationary under the action of the first spring. In this case, the two clamping blocks and the limit clamping block are misaligned, and the two clamping blocks will not limit the limit clamping block. The limit clamping block will swing downward under the extrusion of the protrusion on the electric vehicle that cooperates with it, and finally completely disengage, which can prevent the mutually nested and matched parts of the charging device and the electric vehicle from being damaged by pulling, especially the charging pile is damaged by the electric vehicle pulling the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic view of the overall component appearance.

[0033] Figure 2 It is a schematic view of the overall component distribution.

[0034] Figure 3 It is a schematic view of the installation of the semi-circular plug, connector, rotating shell and handle.

[0035] Figure 4 It is a schematic view of the connector structure.

[0036] Figure 5 It is a schematic view of the rotating shell structure.

[0037] Figure 6 It is a schematic view of the handle structure.

[0038] Figure 7 It is a schematic view of the installation of the limit clamping block.

[0039] Figure 8It is a schematic diagram of the installation of the limit block and the I-shaped sleeve.

[0040] Figure 9 It is a schematic diagram of the structure of the I-shaped sleeve and the rubber sleeve.

[0041] Figure 10 It is a schematic diagram of the installation of the limit mechanism.

[0042] Figure 11 It is a schematic diagram of the structure of the first mounting shell, the second mounting shell and the third mounting shell.

[0043] Figure 12 It is a schematic diagram of the internal structure of the limit mechanism.

[0044] Figure 13 It is a schematic diagram of the charging of an electric vehicle at different charging positions.

[0045] Names of the reference numerals in the figure: 1. Semi-circular plug; 2. Connector; 3. Rotating shell; 4. Handle; 5. Speed-type damper; 6. Electric wire; 7. First pull rope; 8. Limit mechanism; 9. I-shaped sleeve; 10. Rubber sleeve; 11. Elastic plate; 12. Limit clamping block; 13. First installation cavity; 14. Sliding cavity; 15. First rope hole; 16. First electric wire installation hole; 17. Jack; 18. First limit groove; 19. Annular groove; 20. Square hole; 21. Sliding groove; 23. Annular block; 24. Avoidance notch; 25. Elastic protrusion; 26. Card slot; 27. Third limit groove; 28. Ear; 29. Second electric wire installation hole; 30. Second rope hole; 31. Second installation cavity; 32. Third installation cavity; 33. Fourth installation cavity; 34. U-shaped plate; 35. First spring; 36. First fixing plate; 37. First guiding roller; 38. Second guiding roller; 39. First support; 40. Second support; 41. Clamping block; 42. Connecting plate; 43. Stopper; 44. Second fixing plate; 45. Second spring; 46. Third spring; 47. First disc; 49. Connecting sleeve; 50. Second disc; 51. Fifth installation cavity; 52. U-shaped disc; 53. Annular disc; 54. First mounting shell; 55. Trigger plate; 56. Second mounting shell; 57. Mounting rod; 58. Third rope hole; 59. Swing notch; 60. Limit plate; 61. Fourth spring; 62. Second pull rope; 63. Arc-shaped pull block; 64. Fixed shaft; 65. Leaf spring; 66. Partition board; 67. Third guiding roller; 68. Third support; 69. Second limit groove; 70. Third fixing plate. Detailed implementation manners

[0046] The following will further describe in detail the specific implementation manners of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments or drawings are used to illustrate the present invention, but not to limit the scope of the present invention.

[0047] As Figure 1As shown, it includes a semi-circular plug 1, a connector 2, a handle 4, and a limit catch 12. The front end of the connector 2 has a semi-circular plug 1, and the semi-circular plug 1 has a socket 17. The rear end of the connector 2 is installed with a handle 4. Its characteristics are as follows: As Figure 2 , 8 shown, a velocity-type damper 5 is installed inside the connector 2. The velocity-type damper 5 has an energy dissipation capacity related to the speed. The faster the deformation speed, the greater the damping force. A first spring 35 is installed between the housing of the velocity-type damper 5 and the connector 2. One end of an elastic plate 11 is fixedly installed at the front end of the connector 2, and the limit catch 12 is fixedly installed on the elastic plate 11. As Figure 7 shown, two catch blocks 41 are symmetrically and slidably installed on the front side of the connector 2 and slide below the limit catch 12. The two catch blocks 41 are fixedly connected to the housing of the velocity-type damper 5.

[0048] As Figure 3 shown, a rotating shell 3 is swingably installed at one end of the handle 4, and the rotating shell 3 is rotatably installed at the rear end of the connector 2. Figure 2 , 8 shown, an I-shaped sleeve 9 is slidably installed inside the handle 4, and a second spring 45 is installed between the I-shaped sleeve 9 and the handle 4. One end of a wire 6 is connected to the input end inside the semi-circular plug 1. The other end of the wire 6 passes through the connector 2 and the handle 4, and finally passes out of the outside of the handle 4 and is connected to the output end of the charging pile. The wire 6 passes through the I-shaped sleeve 9 and is adhered to the I-shaped sleeve 9. A rubber sleeve 10 is fixedly installed on the outer circumferential surface of the wire 6 connected to the charging pile outside the handle 4. One end of the rubber sleeve 10 has an annular disc 53. The end of the rubber sleeve 10 with the annular disc 53 is inserted into the handle 4 and is hooked with the I-shaped sleeve 9. A first fixing disc 36 and a second fixing disc 44 are fixedly installed on the wire 6. The first fixing disc 36 rotates inside the connector 2 near one end of the handle 4, and the second fixing disc 44 is located inside the handle 4 near one end of the connector 2. When not being pulled normally, the wire 6 between the first fixing disc 36 and the second fixing disc 44 is in a slack state, and the wire 6 between the second fixing disc 44 and the annular disc 53 on the rubber sleeve 10 is in a slack state.

[0049] It is designed that the wire 6 between the first fixing disc 36 and the second fixing disc 44 is in a slack state. When the handle 4 swings relative to the connector 2, the wire 6 fixed to one end of the handle 4 will pull the wire 6 between the first fixing disc 36 and the second fixing disc 44. The reserved slack wire 6 can prevent the wire 6 between the first fixing disc 36 and the second fixing disc 44 from being broken to a certain extent.

[0050] As Figure 8 shown, the inner rod of the above-mentioned velocity-type damper 5 is connected to one end of the I-shaped sleeve 9 near the second fixing disc 44 through a first pull rope 7.

[0051] AsFigure 1 , 2 As shown in Fig. 10, a limiting mechanism 8 for restricting the swing of the handle 4 and the rotating shell 3 is installed at the rear side of the handle 4. When the wire 6 passing through the outside of the handle 4 is triggered and pulled backward, the wire 6 squeezes the trigger limiting mechanism 8 through the rubber sleeve 10 on the outer cylindrical surface, so that the swing function of the handle 4 and the rotating shell 3 is turned on.

[0052] Since the charging port settings of current electric vehicles are different, when the charging device is suddenly impacted or slowly pulled, the pulling directions of the wire 6 on the charging device are different, including horizontal pulling, reverse pulling, and lateral pulling. In order to prevent the pulling force from failing to trigger the smooth operation of the internal structure after the charging device is pulled, the handle 4 designed in the present invention can swing relative to the joint 2, and on this basis, a rotating shell 3 is added to achieve the universal rotation of the handle 4 and the joint 2.

[0053] As Figure 4 shown, a first installation cavity 13 is opened inside the joint 2. A sliding cavity 14 is opened at one end of the first installation cavity 13. A first rope hole 15 passing through the joint 2 is opened at one end of the sliding cavity 14. A sliding groove 21 is opened at the other end of the first installation cavity 13. Two symmetrically distributed square holes 20 are opened at one end of the sliding groove 21; as Figure 2 shown, the velocity-type damper 5 is installed in the first installation cavity 13. The inner rod of the velocity-type damper 5 is located in the sliding cavity 14. The first pull rope 7 connected to the output end of the velocity-type damper 5 passes through the first rope hole 15; one end of the first spring 35 is fixedly installed on the housing of the velocity-type damper 5, and the other end of the first spring 35 is fixedly installed on the end face of the first installation cavity 13; the first spring 35 is pre-compressed, and its function is to reset the velocity-type damper 5. At the same time, when the charging device is slowly pulled, a resistance is provided to the housing of the velocity-type damper through the first spring 35 to prevent the inner rod of the velocity-type damper 5 from sliding and affecting the swing of the limiting block 12 in this state; the U-shaped plate 34 is slidably installed in the sliding groove 21. The U-shaped plate 34 is fixedly connected to the velocity-type damper 5 through a connecting plate 42. The two protruding ends of the U-shaped plate 34 pass through the two square holes 20 and are located outside the joint 2. The two clamping blocks 41 are respectively fixedly installed on the two protrusions at one end of the U-shaped plate 34 located outside the joint 2 and are located below the limiting block 12; when the inner rod of the velocity-type damper 5 is slowly pulled out, the housing of the velocity-type damper 5 remains stationary under the action of the first spring 35, and the two clamping blocks 41 are located in front of the limiting block 12 installed on the joint 2; when the inner rod of the velocity-type damper 5 is quickly pulled out, the housing of the velocity-type damper 5 is pulled and slides toward the side where the first spring 35 is installed due to the increase in damping force, and the two clamping blocks 41 slide to the lower sides of both ends of the limiting block 12 installed on the joint 2.

[0054] As Figure 6 shown, a second wire installation hole 29 is opened at the upper end of the handle 4. A second installation cavity 31 is opened at the lower end of the second wire installation hole 29. A third installation cavity 32 is opened at the lower end of the second installation cavity 31. A fourth installation cavity 33 is opened at the lower side of the third installation cavity 32. One end of the fourth installation cavity 33 communicates with the third installation cavity 32, and the other end of the fourth installation cavity 33 communicates with the outside of the handle 4. The second fixing plate 44 is fitted with the upper end face of the second installation cavity 31. A through second rope hole 30 is also opened between the upper end of the handle 4 and the third installation cavity 32.

[0055] As Figure 9 shown, the above I-shaped sleeve 9 is composed of a first disc 47, a connecting sleeve 49 and a second disc 50. The first disc 47 and the second disc 50 are respectively installed at the upper and lower ends of the connecting sleeve 49. The first disc 47 is located in the third installation cavity 32, and the second disc 50 is located in the fourth installation cavity 33. The upper end of the second spring 45 is fixedly installed on the upper end face of the third installation cavity 32, and the lower end of the second spring 45 is fixedly installed on the lower end face of the third installation cavity 32. The wire 6 passes through and is bonded to the first disc 47, the connecting sleeve 49 and the second disc 50. The second spring 45 plays a reset role for the I-shaped sleeve 9.

[0056] As Figure 2 、 8 shown, one end of the rubber sleeve 10 located inside the handle 4 is fixedly installed with a U-shaped disc 52. An annular disc 53 is fixedly installed at the upper end of the U-shaped disc 52. The annular disc 53 is located in the fourth installation cavity 33. The second disc 50 of the I-shaped sleeve 9 is nested inside the U-shaped disc 52 and is limited by the annular disc 53. The upper end of the third spring 46 is fixedly installed on the lower end face of the annular disc 53, and the lower end of the third spring 46 is fixedly installed on the lower end face of the fourth installation cavity 33. The third spring 46 plays a reset role for the rubber sleeve 10.

[0057] One end of the first pull rope 7 connected to the I-shaped sleeve 9 passes through the second rope hole 30.

[0058] When not being pulled normally, the wire 6 located in the second installation cavity 31 is in a relaxed state. The purpose of this design is to prevent the wire 6 of the charging device from moving outward after being pulled, and to prevent the wire 6 between the handle 4 and the connector 2 from being pulled.

[0059] As Figure 4As shown, a fifth installation cavity 51 is formed inside the above-mentioned joint 2. First wire installation holes 16 are formed at both ends of the fifth installation. The first wire installation hole 16 close to the semi-circular plug 1 communicates with the semi-circular plug 1, and the other first wire installation hole 16 communicates with one end of the joint 2 close to the handle 4; a second limiting groove 69 is formed inside the first wire installation hole 16 close to the semi-circular plug 1, and a first limiting groove 18 is formed inside the first wire installation hole 16 close to the handle 4, as Figure 2 , 8 shown, the third fixing plate 70 is fixedly installed inside the third limiting groove 27, and the first fixing plate 36 is rotatably installed inside the first limiting groove 18; the wire 6 between the first fixing plate 36 and the third fixing plate 70 is in a slack state. The reason for designing the wire 6 between the first fixing plate 36 and the third fixing plate 70 to be in a slack state is to prevent the rotating shell 3 from driving the wire 6 inside the joint 2 to rotate when the rotating shell 3 rotates relative to the joint 2, and to buffer the damage to the connection between the wire 6 and the semi-circular plug 1 caused by rotation through the slack wire 6.

[0060] As Figure 4 shown, two annular grooves 19 are formed on the outer circumferential surface of one end of the above-mentioned joint 2 close to the handle 4, and a plurality of clamping grooves 26 are circumferentially and evenly formed on the outer circumferential surface of the joint 2 located between the two annular grooves 19, as Figure 5 shown, two annular blocks 23 are installed on the inner circumferential surface of the rotating shell 3, and a plurality of elastic protrusions 25 are circumferentially and evenly installed on the inner circumferential surface of the rotating shell 3 located between the two annular blocks 23, as Figure 3 shown, the rotating shell 3 is installed at one end of the joint 2 far from the semi-circular plug 1 through the rotational cooperation of the two annular blocks 23 and the two annular grooves 19; the elastic protrusions 25 installed on the rotating shell 3 are in one-to-one correspondence and cooperation with the clamping grooves 26 formed on the joint 2. The elastic protrusions 25 and the clamping grooves 26 cooperate to limit the rotation of the rotating shell 3 and the joint 2 when they are not being pulled normally, and the rotating shell 3 and the joint 2 remain relatively stationary without affecting normal use; after being subjected to a large torsional force, the rotating shell 3 will break through the limit of the elastic protrusions 25 and the clamping grooves 26 and rotate relative to the joint 2; when a person trips over the wire 6, the rotating shell 3 will not be triggered, and when the vehicle pulls the wire 6, the rotating shell 3 will be triggered.

[0061] As Figure 6 shown, the upper end of the above-mentioned handle 4 has a lug 28, as Figure 3 shown, the handle 4 is hingedly installed with the rotating shell 3 through the lug 28.

[0062] As Figure 2 , 8As shown in the figure, the second guide roller 38 is fixedly installed in the rotating shell 3 through the first support 39, and the third guide roller 67 is installed in the rotating shell 3 through the third support 68. The second guide roller 38 and the third guide roller 67 guide the first pulling rope 7 entering the rotating shell 3; the first guide roller 37 is installed in the rotating shell 3 through the second support 40, and the first guide roller 37 guides the electric wire 6 entering the rotating shell 3; the above-mentioned first guide roller 37, second guide roller 38 and third guide roller 67 appear in pairs; the third guide roller 67 is located at the axis of the hinge between the handle 4 and the rotating shell 3; the second guide roller 38 and the third wire roller guide the first pulling rope 7 entering the rotating shell 3 to ensure that the first pulling rope 7 can normally trigger the speed damper 5.

[0063] As Figure 8 shown in the figure, a partition plate 66 for isolating the electric wire 6 and the first pulling rope 7 is installed in the rotating shell 3.

[0064] As Figure 1 shown in the figure, two stoppers 43 are symmetrically installed on both sides of the rotating shell 3 to prevent the handle 4 from swinging towards the side close to the joint 2.

[0065] As Figure 5 shown in the figure, two third limiting grooves 27 are symmetrically opened on the lower side of the rear end of the rotating shell 3.

[0066] As Figure 10 、 12 shown in the figure, the limiting mechanism 8 includes a first mounting shell 54, a trigger plate 55, a second mounting shell 56, a mounting rod 57, a limiting plate 60, a fourth spring 61, a second pulling rope 62, an arc-shaped pulling block 63, and a leaf spring 65. Among them, as Figure 11 shown in the figure, a swinging notch 59 is opened at the lower end of the first mounting shell 54. The first mounting shell 54 is fixedly installed on the outer circular surface of the lower end of the handle 4. The second mounting shell 56 is fixedly installed on the outer circular surface of the upper end of the handle 4. A mounting rod 57 is installed between the first mounting shell 54 and the second mounting shell 56. A through third rope hole 58 is opened between the first mounting shell 54, the second mounting shell 56 and the mounting rod 57. As Figure 12As shown in the figure, one end of the arc-shaped pulling block 63 is installed in the first mounting shell 54 through a fixed shaft 64. One end of the trigger plate 55 is installed on the arc-shaped pulling block 63, and the other end of the trigger plate 55 passes through the swing notch 59 on the first mounting shell 54 and is located outside the first mounting shell 54. The trigger plate 55 cooperates with the wire 6 located outside the handle 4. The limiting plate 60 is of a U-shaped structure and is slidably installed in the second mounting shell 56. A fourth spring 61 is installed between the lower end of the limiting plate 60 and the bottom surface of the second mounting shell 56. The lower end of the limiting plate 60 is connected to the upper end of the arc-shaped pulling block 63 through a second pulling rope 62, and the second pulling rope 62 passes through the third pulling rope hole. A leaf spring 65 is installed between the end of the trigger plate 55 located in the first mounting shell 54 and the first mounting shell 54. The function of the leaf spring 65 is to reset the trigger plate 55, and the function of the fourth spring 61 is to reset the limiting plate 60.

[0067] As Figure 2 shown, the two protrusions at the upper end of the above-mentioned limiting plate 60 cooperate with the two third limiting grooves 27 opened on the rotating shell 3.

[0068] As Figure 5 shown, an avoidance notch 24 is opened at the rear end of the above-mentioned rotating shell 3.

[0069] After the wire 6 of the charging device is pulled, it will squeeze the trigger plate 55. The trigger plate 55 swings around the fixed shaft 64. The swing of the trigger plate 55 drives the swing of the arc-shaped pulling block 63. The swing of the arc-shaped pulling block 63 will pull the second pulling rope 62. The second pulling rope 62 pulls the limiting plate 60 to move downward, so that the limiting plate 60 is disengaged from the third limiting groove 27 on the rotating shell 3, and the limiting mechanism 8 loses the limit on the swing of the handle 4 and the rotating shell 3, ensuring that the included angle between the pulling force and the sliding direction of the I-shaped sleeve 9 is as small as possible, which is convenient for driving the pulling rope to trigger the limiting of the limiting block 41 to the limiting block 12.

[0070] As Figure 13As shown in the figure, in practical applications of the present invention, due to different charging positions of the vehicle, the direction of the pulling force after starting is random. The handle 4 is hinged to the rotating shell 3, and the rotation of the rotating shell 3 and the joint 2 ensures the pulling direction of the pulling force on the pulling rope. When the handle 4 is subjected to a pulling force perpendicular to the handle 4 and this pulling force is within the plane formed by the joint 2 and the handle 4, at this time, the pulling force is perpendicular to the pulling direction of the pulling rope, and the pulling force cannot pull the pulling rope. Through the swing of the handle 4 relative to the rotating shell 3, the pulling force gradually becomes the same as the pulling direction of the pulling rope, and the pulling effect of the pulling force on the pulling rope is ensured. During the swing of the handle 4 relative to the rotating shell 3, since the pulling rope is limited on the swing axis by the third guiding roller 67, the swing has no adverse effect of tightening or loosening the pulling rope. When the handle 4 is subjected to a pulling force perpendicular to the handle 4 and this pulling force is perpendicular to the plane formed by the joint 2 and the handle 4, at this time, the pulling force is perpendicular to the pulling direction of the pulling rope, and the pulling force cannot pull the pulling rope. Through the rotation of the rotating shell 3 relative to the joint 2, during the rotation, since the pulling rope is limited away from the rotation center of the rotating shell 3 by the second guiding roller 38, the rotation of the rotating shell 3 can directly trigger the movement of the pulling rope.

[0071] Specific working process: When using the charging device designed by the present invention, when the charging device is subjected to a sudden impact force, such as someone accidentally tripping over the wire 6 of the charging device, at this time, the wire 6 of the charging device will pull the rubber sleeve 10, and the sliding of the rubber sleeve 10 drives the sliding of the I-shaped sleeve 9. The sliding of the I-shaped sleeve 9 pulls the first pulling rope 7, and the first pulling rope 7 pulls the inner rod of the velocity-type damper 5 to slide. However, because the impact force it receives suddenly increases and is relatively fast, the resistance of the velocity-type damper 5 is large, and the inner rod and the housing of the velocity-type damper 5 basically remain in an integral state. Therefore, when the charging device is subjected to a sudden impact force, the velocity-type damper 5 will drive the sliding of the connecting plate 42, the connecting plate 42 drives the sliding of the U-shaped plate 34, and the sliding of the U-shaped plate 34 drives the sliding of the two clamping blocks 41, so that they slide to the lower side of the limiting block to limit the limiting clamping block 12; that is, the limiting clamping block 12 that plays a clamping role will not come off from the protrusion that plays a clamping role on the electric vehicle after being pulled, that is, the charging device will not come off from the electric vehicle when it is subjected to a sudden impact force, which can prevent gaps from appearing between the components that are nested and matched with each other between the charging device and the electric vehicle, causing sparks and damaging the charging device and the electric vehicle.

[0072] When the charging device is subjected to a slow pulling force, such as when the electric vehicle is fully charged and people drive away the electric vehicle without unplugging the charging device, the wire 6 of the charging device will then pull the rubber sleeve 10. The sliding of the rubber sleeve 10 drives the sliding of the I-shaped sleeve 9, and the sliding of the I-shaped sleeve 9 pulls the first pull rope 7. The first pull rope 7 pulls the inner rod of the velocity-type damper 5 to slide. Since the pulling force it receives increases slowly and the speed is relatively slow, the resistance of the velocity-type damper 5 is relatively small. At this time, the inner rod of the velocity-type damper 5 will be pulled, while the housing of the velocity-type damper 5 is basically stationary under the action of the first spring 35. In this case, the two latch blocks 41 and the limit latch block 12 are misaligned. The two latch blocks 41 do not limit the limit latch block 12, and the limit latch block 12 will swing downward when being squeezed by the protrusion on the electric vehicle that cooperates with it, and is very likely to become disengaged, which can prevent the components that cooperate with each other by nesting the charging device and the electric vehicle from being damaged by pulling, especially preventing the charging pile from being damaged when the electric vehicle pulls it through the wire 6.

Claims

1. A safety charging device suitable for electric vehicles, which includes a semi-circular plug, a connector, a handle, and a limit block. The front end of the connector has a semi-circular plug with a jack on it. The rear end of the connector is installed with a handle. It is characterized in that: A speed-type damper is installed inside the connector, and a first spring is installed between the housing of the speed-type damper and the connector; one end of the elastic plate is fixedly installed at the front end of the connector, and the limit block is fixedly installed on the elastic plate; two blocks are symmetrically slidably installed on the front side of the connector and slide below the limit block, and the two blocks are fixedly connected to the housing of the speed-type damper; One end of the handle is swingably installed with a rotating shell, and the rotating shell is rotatably installed at the rear end of the connector; the I-shaped sleeve is slidably installed in the handle, and a second spring is installed between the I-shaped sleeve and the handle; one end of the wire is connected to the input end inside the semi-circular plug, and the other end of the wire passes through the connector and the handle, and finally passes out of the outside of the handle and is connected to the output end of the charging pile. The wire passes through the I-shaped sleeve and is adhered to the I-shaped sleeve; a rubber sleeve is fixedly installed on the outer circumferential surface of the wire connected to the charging pile outside the handle. One end of the rubber sleeve has an annular disc, and the end of the rubber sleeve with the annular disc is inserted into the handle and is engaged with the I-shaped sleeve; the wire is fixedly installed with a first fixing disc and a second fixing disc. The first fixing disc rotates inside the connector near one end of the handle, and the second fixing disc is located inside the handle near one end of the connector; when not being pulled normally, the wire between the first fixing disc and the second fixing disc is in a slack state, and the wire between the second fixing disc and the annular disc on the rubber sleeve is in a slack state; The inner rod of the speed-type damper is connected to one end of the I-shaped sleeve near the second fixing disc through a first pull rope; A limit mechanism for restricting the swing of the handle and the rotating shell is installed at the rear side of the handle. When the wire passing out of the outside of the handle is triggered and pulled backward, the wire squeezes the trigger limit mechanism through the rubber sleeve on the outer circumferential surface, so that the swing function of the handle and the rotating shell is opened; A fifth installation cavity is opened inside the connector. Both ends of the fifth installation are opened with first wire installation holes. The first wire installation hole near the semi-circular plug communicates with the semi-circular plug, and the other first wire installation hole communicates with one end of the connector near the handle; a second limit groove is opened in the first wire installation hole near the semi-circular plug, and a first limit groove is opened in the first wire installation hole near the handle. The third fixing disc is fixedly installed in the third limit groove, and the first fixing disc is rotatably installed in the first limit groove; the wire between the first fixing disc and the third fixing disc is in a slack state; Two annular grooves are opened on the outer circumferential surface of the connector near one end of the handle. A plurality of card slots are evenly opened in the circumferential direction on the outer circumferential surface of the connector located between the two annular grooves. Two annular blocks are installed on the inner circumferential surface of the rotating shell. A plurality of elastic protrusions are evenly installed in the circumferential direction on the inner circumferential surface of the rotating shell located between the two annular blocks. The rotating shell is installed at one end of the connector away from the semi-circular plug through the rotational cooperation of the two annular blocks and the two annular grooves; the elastic protrusions installed on the rotating shell correspond to the card slots opened on the connector one by one.

2. A safety charging device suitable for electric vehicles according to claim 1, It is characterized in that: The inner side of the joint is provided with a first installation cavity. One end of the first installation cavity is provided with a sliding cavity, and one end of the sliding cavity is provided with a first rope hole penetrating through the joint. The other end of the first installation cavity is provided with a sliding groove, and one end of the sliding groove is provided with two symmetrically distributed square holes; A velocity-type damper is installed in the first installation cavity. The inner rod of the velocity-type damper is located in the sliding cavity, and a first pull rope connected to the output end of the velocity-type damper passes through the first rope hole; One end of the first spring is fixedly installed on the housing of the velocity-type damper, and the other end of the first spring is fixedly installed on the end face of the first installation cavity; The U-shaped plate is slidably installed in the sliding groove, and the U-shaped plate is fixedly connected to the velocity-type damper through a connecting plate. The two protruding ends of the U-shaped plate pass through the two square holes and are located outside the joint. Two clamping blocks are respectively fixedly installed on the two protrusions at one end of the U-shaped plate located outside the joint and are located below the limit clamping block; When the inner rod of the velocity-type damper is slowly pulled out, the housing of the velocity-type damper remains stationary under the action of the first spring, and the two clamping blocks are located in front of the limit clamping block installed on the joint; When the inner rod of the velocity-type damper is quickly pulled out, the housing of the velocity-type damper is pulled and slides towards the side where the first spring is installed due to the increase in damping force, and the two clamping blocks slide to the lower sides of both ends of the limit clamping block installed on the joint.

3. The safe charging device applicable to electric vehicles according to claim 1, characterized in that: A second wire installation hole is opened at the upper end of the handle. The lower end of the second wire installation hole is provided with a second installation cavity. The lower end of the second installation cavity is provided with a third installation cavity. The lower side of the third installation cavity is provided with a fourth installation cavity. One end of the fourth installation cavity communicates with the third installation cavity, and the other end of the fourth installation cavity communicates with the outside of the handle; The second fixed disk is matched with the upper end face of the second installation cavity; A through second rope hole is also opened between the upper end of the handle and the third installation cavity; The I-shaped sleeve is composed of a first disk, a connecting sleeve and a second disk. The first disk and the second disk are respectively installed at the upper and lower ends of the connecting sleeve. The first disk is located in the third installation cavity, and the second disk is located in the fourth installation cavity. The upper end of the second spring is fixedly installed on the upper end face of the third installation cavity, and the lower end of the second spring is fixedly installed on the lower end face of the third installation cavity; The wire passes through and is bonded to the first disk, the connecting sleeve and the second disk; One end of the rubber sleeve located inside the handle is fixedly installed with a U-shaped disk. The annular disk is fixedly installed on the upper end of the U-shaped disk. The annular disk is located in the fourth installation cavity. The second disk of the I-shaped sleeve is nested in the U-shaped disk and is limited by the annular disk; The upper end of the third spring is fixedly installed on the lower end face of the annular disk, and the lower end of the third spring is fixedly installed on the lower end face of the fourth installation cavity; One end of the first pull rope connected to the I-shaped sleeve passes through the second rope hole; When not being pulled normally, the wire located in the second installation cavity is in a slack state.

4. The safe charging device applicable to electric vehicles according to claim 1, characterized in that: The upper end of the handle has an ear, and the handle is hingedly installed with the rotating shell through the ear.

5. The safe charging device applicable to electric vehicles according to claim 1, characterized in that: The second guiding roller is fixedly installed in the rotating shell through the first support, and the third guiding roller is installed in the rotating shell through the third support. The second guiding roller and the third guiding roller guide the first pulling rope entering the rotating shell; the first guiding roller is installed in the rotating shell through the second support, and the first guiding roller guides the electric wire entering the rotating shell. The first guiding roller, the second guiding roller and the third guiding roller appear in pairs; the third guiding roller is located at the axis of the hinge between the handle and the rotating shell; A partition for isolating the electric wire and the first pulling rope is installed in the rotating shell.

6. The safe charging device applicable to electric vehicles according to claim 5, characterized in that: Two stoppers are symmetrically installed on both sides of the rotating shell.

7. The safe charging device applicable to electric vehicles according to claim 6, characterized in that: Two third limiting grooves are symmetrically opened on the lower side of the rear end of the rotating shell; The limiting mechanism includes a first mounting shell, a trigger plate, a second mounting shell, a mounting rod, a limiting plate, a fourth spring, a second pulling rope, an arc-shaped pulling block, and a leaf spring. A swinging notch is opened at the lower end of the first mounting shell. The first mounting shell is fixedly installed on the outer circular surface of the lower end of the handle. The second mounting shell is fixedly installed on the outer circular surface of the upper end of the handle. A mounting rod is installed between the first mounting shell and the second mounting shell. A through third rope hole is opened between the first mounting shell, the second mounting shell and the mounting rod. One end of the arc-shaped pulling block is installed in the first mounting shell through a fixed shaft. One end of the trigger plate is installed on the arc-shaped pulling block. The other end of the trigger plate passes through the swinging notch on the first mounting shell and is located outside the first mounting shell. The trigger plate cooperates with the electric wire located outside the handle; the limiting plate is of a U-shaped structure. The limiting plate is slidably installed in the second mounting shell, and a fourth spring is installed between the lower end of the limiting plate and the bottom surface of the second mounting shell. The lower end of the limiting plate is connected to the upper end of the arc-shaped pulling block through a second pulling rope. The second pulling rope passes through the third pulling rope hole; a leaf spring is installed between the end of the trigger plate located in the first mounting shell and the first mounting shell; The two protrusions at the upper end of the limiting plate cooperate with the two third limiting grooves opened on the rotating shell.

8. The safe charging device applicable to electric vehicles according to claim 7, characterized in that: An avoidance notch is opened at the rear end of the rotating shell.

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