Charging gun line winding mechanism

Abstract

A kind of charging gun line winding mechanism, including gun box, charging gun, charging cable and winding mechanism, middle part of gun box is transversely provided with fixed sleeve, the inner end of charging cable is fixed on the fixed sleeve, the winding mechanism includes winding drum and first motor, the middle part of winding drum is sleeved on the fixed sleeve and is rotatably arranged in gun box and has inner cavity and annular wall, the annular wall has through hole for charging cable to pass through;First motor is arranged on one side of gun box and has power output shaft, the power output shaft is drivingly connected with the winding drum and is rotatably arranged in fixed sleeve.The inner cavity of winding drum is increased to store charging cable, while the one end of charging cable is fixed on the fixed sleeve, to ensure the stability and reliability of electric conduction, and to prevent safety accidents caused by poor electric contact.

Description

TECHNICAL FIELD

[0001] The present application relates to a vehicle charging device, in particular to a charging gun. BACKGROUND

[0002] With the increasing control requirements of carbon emissions of traditional cars, new energy electric vehicles are booming, but the current electric vehicle battery technology has short endurance mileage, long charging time, and high dependence on charging piles, so the demand for public charging piles is increasing sharply.

[0003] The basic structure of the charging pile includes a charging cabinet and a charging gun. The charging gun is connected with the charging cabinet through a charging cable. The charging gun can be matched with the charging plug of the vehicle to charge the vehicle. In order to realize charging at different distances, a cable winding device is often provided on the charging cabinet to facilitate the extension and storage of the charging cable. The related document can refer to the Chinese utility model patent No. ZL201820986494.9 "Movable electric vehicle charging pile for new energy electric vehicle" (authorized publication number CN208698540U). There are also winding devices designed independently from the charging cabinet, such as the Chinese utility model patent No. ZL201821752796.6 "Automobile charging gun with high density" (authorized publication number CN209133754U).

[0004] The cable winding mechanism structure on the market now is spring ratchet mechanism + power conversion head. The function of the spring ratchet mechanism can automatically recover the cable through the potential energy of the spring. The function of the power conversion head is to convert the rotating cable into an intermediate fixed output cable. Its structure adopts rotating friction contact between copper sheet and spring sheet for electric energy conduction. Its disadvantages are that the conversion head produces poor contact, unstable signal, and sparks when conducting electricity during cable rotation, which is not safe. It cannot transmit electric information and electric energy during contraction, and needs to wait for the contraction to stop before transmission.

[0005] At the same time, the existing cable winding device has the following problems when in use. First, the length of the cable recovery is not easy to control. If it is too short, it will cause a lot of exposed cable. If it is too long, it will produce a great impact on the charging pile, which will bring inconvenience to the operation. Second, the user needs to hold the charging gun with one hand and operate the winding device with the other hand in order to extend the charging cable to the appropriate length, or two people need to cooperate to complete the operation, which is also not very convenient and cannot be completed with one hand.

[0006] In addition, the existing charging gun has the disadvantages of poor contact, poor connection firmness, and inconvenient operation when contacting with the vehicle charging socket. There is also the risk of high temperature and fire due to poor contact when charging with large current. SUMMARY

[0007] The first technical problem to be solved by the present application is to provide a charging gun cable winding mechanism with good electrical conductivity during cable winding and unwinding.

[0008] The second technical problem to be solved by the present application is to provide a charging gun cable winding mechanism that is convenient and fast to dock with a charging head

[0009] The technical solution adopted by the present application to solve the first technical problem is a charging gun cable winding mechanism, which comprises a gun box, a charging gun, a charging cable and a winding mechanism.

[0010] The winding drum is sleeved on the middle part of the fixed sleeve and rotatably arranged in the gun box, and has an inner cavity for accommodating a part of the charging cable and an annular wall for winding another part of the charging cable, the annular wall having a through hole for the charging cable to pass through.

[0011] The first motor is arranged on one side of the gun box and has a horizontally arranged power output shaft, which is drivingly connected with the winding drum and rotatably arranged in the fixed sleeve.

[0012] The charging cable has a flat cross section and is integrally formed with spring leaves on both sides.

[0013] In order to orderly enter and manage the charging cable, an arc-shaped guide plate is arranged on the inner side of the winding drum close to the through hole, and a guide block opposite to the through hole is arranged on the guide plate, and the guide block is provided with a guide hole for the charging cable to pass through.

[0014] The charging gun is provided with an operation button for controlling the rotation of the first motor, and the signal output end of the operation button is connected with the control panel, and the operation button can be touched in the state of holding the grip of the handheld charging gun.

[0015] The charging cable is provided with a signal line, one end of which is connected with the operation button and the other end is connected with the control panel.

[0016] The technical solution adopted by the present invention to solve the second technical problem mentioned above is as follows: the charging gun has a charging head that is electrically connected to the charging socket of the vehicle, the charging gun is provided with a second motor, the power output end of the second motor is provided with a drive gear, correspondingly, the head of the charging gun has a rotating wheel on the outer ring of the charging head, the rear end of the rotating wheel has an internal gear ring, the internal gear ring meshes with the aforementioned drive gear, and the inner side of the front end of the aforementioned rotating wheel has an internal thread that mates with the external thread of the outer end of the charging socket.

[0017] After the charging head is connected to the charging socket, the second motor is started. The second motor drives the drive gear to rotate, which in turn drives the internal gear ring and the rotating wheel to rotate, thereby quickly completing the threaded connection between the rotating wheel and the charging socket, ensuring that the charging head is properly connected.

[0018] A position sensor is installed on one side of the charging head. When the rotating wheel contacts the charging socket, it triggers the position sensor, which sends a signal to the control board. The control board then controls the second motor to start, causing the rotating wheel to engage with the charging socket's threads. This ensures more stable contact between the charging gun and the charging socket, preventing fires caused by poor contact due to contact or other accidents during charging.

[0019] The charging gun head is equipped with a temperature sensor connected to the control board. During charging, if the charging head exceeds the set temperature, the control board controls the second motor to reverse, causing the rotating wheel to disengage from the charging socket. If the temperature rises too high, the control board immediately issues a command to reverse the second motor, causing the rotating wheel to quickly disengage from the charging socket, ensuring that the two are disconnected.

[0020] Compared with the prior art, the advantages of the present invention are: the inner cavity of the winding drum is increased to store the charging cable, and one end of the charging cable is fixed to the fixed sleeve, which ensures the stability and reliability of electrical conduction and eliminates safety accidents caused by poor conductive contact. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Example 1.

[0022] Figure 2 for Figure 1 A schematic diagram of the structure after removing the gun box.

[0023] Figure 3 for Figure 2 Another magnified view of the winding drum.

[0024] Figure 4 This is a cross-sectional view of the charging cable.

[0025] Figure 5 This is the control principle diagram for Example 1.

[0026] Figure 6 This is a cross-sectional view of the charging gun in Example 2.

[0027] Figure 7 The control schematic diagram of Example 2. DETAILED DESCRIPTION

[0028] The application will be further described in detail below with reference to the accompanying drawings.

[0029] Example 1, in combination with Figure 1 , Figure 2 and Figure 3 shown, the charging gun cable winding mechanism in the embodiment includes a gun box 1, a charging gun 3, a charging cable 2 and a winding mechanism, the charging gun 3 is arranged at the end of the charging cable 2 and can be telescopically arranged in the gun box 1 through the winding mechanism, a fixed sleeve 43 is arranged transversely in the middle of the gun box 1, and the inner end of the charging cable 2 is fixed on the fixed sleeve 43.

[0030] The winding mechanism includes a winding drum 4 and a first motor 5, the winding drum 4 is sleeved on the fixed sleeve 43 in the middle and is rotatably arranged in the gun box 1 and has an inner cavity 41 and an annular wall 42, the annular wall 42 has a through hole 46 for the charging cable 2 to pass through, in combination with Figure 5 shown, the charging cable 2 in the embodiment includes a front section 21 and a rear section 22 connected with the front section 21, wherein the cross section of the rear section 22 is flat and two sides are integrally formed with spring sheets 221 having elasticity, the arrangement of the spring sheets 221 can make the charging cable quickly retract. The inner cavity 41 is used for accommodating the rear section 22, and the annular wall 42 is used for winding the front section 21.

[0031] An arc-shaped guide plate 45 is arranged on the inner side of the winding drum 4 close to the through hole, the guide plate 45 is provided with a guide block 44 opposite to the through hole, and the guide block 44 is provided with a guide hole for the charging cable 2 to pass through. The arrangement of the guide plate and the guide block can ensure that the charging cable enters and exits in order without winding and knotting, and the through hole is not blocked.

[0032] The first motor 5 is arranged on one side of the gun box 1 and has a power output shaft 51 arranged transversely, the power output shaft 51 is drivingly connected with the winding drum 4 and is rotatably arranged in the fixed sleeve 43.

[0033] The charging gun 3 is provided with an operation button 32 capable of controlling the rotation of the first motor 5, the signal output end of the operation button 32 is connected with the control panel 10 through a signal line 321, and the operation button 32 can be touched in the state of holding the charging gun grip part 31. In combination with Figure 5 shown, the charging cable 2 is internally provided with a signal line 321, one end of the signal line 321 is connected with the operation button 32, and the other end is connected with the control panel 10.

[0034] Example 2, in combination with Figure 6As shown, the charging gun 3 in this embodiment has a charging head 33 electrically connected to the charging socket 8 of the vehicle. The charging gun 3 is provided with a second motor 6, and the power output end of the second motor 6 is provided with a driving gear 61. Correspondingly, the head of the charging gun 3 is provided with a rotating wheel 7 outside the charging head 33. The rear end of the rotating wheel 7 is provided with an internal gear ring 71, which is engaged with the driving gear 61. The front end of the rotating wheel 7 is provided with an internal thread 72 on the inside, which is matched with the external thread of the outer end of the charging socket 8. After the charging head is connected to the charging socket, the second motor is started, and the second motor drives the driving gear to rotate, thereby driving the internal gear ring and the rotating wheel to rotate, so as to quickly complete the thread connection between the rotating wheel and the charging socket, and ensure that the charging head is connected in place.

[0035] In combination Figure 7 As shown, the charging head 33 is provided with a position sensor 34 on one side. After the rotating wheel 7 is in contact with the charging socket 8, the position sensor 34 is triggered, and the position sensor 34 sends a signal to the control panel 10. The control panel 10 controls the second motor 6 to start so as to make the rotating wheel 7 threadedly screwed with the charging socket 8. The contact between the charging gun and the charging socket is more stable, and the contact failure caused by touching or other accidental reasons during the charging process is prevented to cause a fire.

[0036] The head of the charging gun 3 is provided with a temperature sensor 35 connected to the control panel 10. During the charging process, if the temperature of the charging head 33 exceeds the set temperature, the control panel 10 controls the second motor 6 to reverse so as to make the rotating wheel 7 loose with the charging socket 8. Other structures refer to Embodiment 1. Once the temperature rises too high due to an accident, the control panel immediately issues an instruction, and the second motor reverses to make the rotating wheel quickly loose with the charging socket, so as to ensure that the two are disconnected.

[0037] Other structures of this embodiment refer to Embodiment 1.

Claims

1. A charging gun cable winding mechanism, comprising a gun box (1), a charging gun (3), a charging cable (2) and a winding mechanism, the charging gun (3) being arranged at the end of the charging cable (2) and being retractably arranged in the gun box (1) by the winding mechanism, characterized in that The middle part of the gun box (1) is transversely provided with a fixing sleeve (43), the inner end of the charging cable (2) is fixed on the fixing sleeve (43), the winding mechanism comprises a winding drum (4) which is sleeved on the fixing sleeve (43) and is rotatably arranged in the gun box (1) and has an inner cavity for accommodating a part of the charging cable (2) and an annular wall (42) for winding another part of the charging cable (2), the annular wall (42) has a through hole for the charging cable (2) to pass through; a first motor (5) which is arranged on one side of the gun box (1) and has a transversely arranged power output shaft (51), the power output shaft (51) is drivingly connected with the winding drum (4) and is rotatably arranged in the fixing sleeve (43); an arc-shaped guide plate (45) is arranged on the inner side of the winding drum (4) close to the through hole, the guide plate (45) is provided with a guide block (44) opposite to the through hole, the guide block (44) is provided with a guide hole for the charging cable (2) to pass through; the charging gun (3) is provided with an operation button (32) which can control the rotation of the first motor (5), the signal output end of the operation button (32) is connected with the control board (10), and the operation button (32) can be touched in the state of holding the hand-held charging gun grip (31); the charging cable (2) is provided with a signal line (321) arranged therein, one end of the signal line (321) is connected with the operation button (32), and the other end is connected with the control board (10); the charging gun (3) has a charging head (33) which is electrically connected with the charging socket (8) of the vehicle, the charging gun (3) is provided with a second motor (6), the power output end of the second motor (6) is provided with a driving gear (61), correspondingly, the head of the charging gun (3) is provided with a rotating wheel (7) outside the charging head (33), the rear end of the rotating wheel (7) is provided with an internal gear ring (71), the internal gear ring (71) is engaged with the driving gear (61), and the front end of the rotating wheel (7) is provided with an internal thread (72) matched with the external thread of the outer end of the charging socket (8); one side of the charging head (33) is provided with a position sensor (34), the position sensor (34) is triggered after the rotating wheel (7) contacts the charging socket (8), the position sensor (34) sends a signal to the control board (10), the control board (10) controls the second motor (6) to start so that the rotating wheel (7) is threadedly combined with the charging socket (8); the head of the charging gun (3) is provided with a temperature sensor (35) connected with the control board (10), when the charging head (33) exceeds the set temperature during the charging process, the control board (10) controls the second motor (6) to reverse so that the rotating wheel (7) is loosened from the charging socket (8).

2. The charging gun cable take-up winding mechanism of claim 1, wherein At least part of the cross section of the charging cable (2) is flat, and spring sheets (221) with elasticity are integrally formed on both sides.

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