Electronic locking device of new energy automobile

Abstract

The invention discloses an electronic locking device of a new energy automobile, which comprises a bottom shell (3) used for accommodating internal components; the gear transmission assembly (1) comprises a motor (9), a worm (10), a bevel gear assembly (11) and a ball screw (18), and the gear transmission assembly drives the worm (10) to rotate through the motor (9), drives the bevel gear assembly (11) to conduct transmission and controls the lock rod (4) to move front and back through the ball screw (18); and the lock rod (4) is connected with the ball screw (18) through a lock rod fixing piece (21), and the lock rod is locked or unlocked along with the axial movement of the ball screw. According to the electronic locking device of the new energy automobile, the worm gear / helical tooth-worm-ball screw structure is adopted, the retaining force of the locking device and the movement precision of the lock rod are greatly improved, the gun pulling or stealing behavior by mistake is effectively prevented, the springback phenomenon of the lock rod in the locking or unlocking process can be prevented through the structure, and the service life of the electronic locking device is prolonged. The stability of the locking state is guaranteed, the problem of signal loss caused by springback of the lock rod is reduced, and therefore the reliability and safety of the whole system are improved.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicles, and in particular to an electronic locking device for new energy vehicles. Background Art

[0002] With the popularity of new energy vehicles, the safety and convenience requirements of electric vehicles are getting higher and higher, among which safety protection during charging is particularly important. In order to prevent the charging gun from being accidentally unplugged or stolen during charging, the electronic locking device has become an indispensable part of the charging pile system. Traditional electronic locking devices usually achieve the locking function through structures such as motors, gears, and racks, which can effectively control the up and down or forward and backward movement of the locking rod. However, the existing technology has some obvious defects in the structural design and performance of the electronic locking device, which needs to be improved urgently.

[0003] In existing electronic locking devices, the motor usually drives the rack-and-pinion system to drive the lock rod to move after the spur gear is meshed. However, due to the limitations of the rack-and-pinion structure, the lock rod is prone to large rebound during the locking or unlocking process, resulting in insufficient positioning accuracy of the lock rod, small holding force, affecting the reliability of the lock, and even causing the feedback signal to be lost. At the same time, the cost of using metal gear reducers in the prior art is high, and it is easily affected by external environments such as salt spray, resulting in corrosion and wear, affecting the durability and stability of the equipment.

[0004] In addition, the manual emergency unlocking device is an important component of the electronic locking system, and is used for emergency unlocking when the electronic system fails. However, the existing manual unlocking device is directly connected to the transmission mechanism, and the entire transmission system needs to be driven to move when unlocking. The unlocking force is large, especially in low temperature environments or when the transmission system is stuck, which may cause the manual unlocking to fail. At the same time, the manual emergency pull rope is prone to friction and loss with the waterproof seal during long-term use, thereby affecting the sealing performance of the entire device.

[0005] Therefore, existing electronic locking devices have shortcomings such as insufficient locking accuracy, complex structure, difficulty in manual unlocking, and insufficient waterproof performance, and cannot meet the safety and reliability requirements in new energy vehicle charging scenarios. Summary of the invention

[0006] In order to solve the above problems, the present invention provides an electronic locking device for new energy vehicles, aiming to improve the holding force and accuracy of the locking mechanism, improve the reliability of manual emergency unlocking, and enhance the waterproof performance of the equipment to meet the charging safety requirements of modern new energy vehicles.

[0007] The present invention is realized by the following technical scheme: an electronic locking device for a new energy vehicle, comprising: A bottom shell, used to accommodate various internal components; The gear transmission assembly includes a motor, a worm, a helical gear assembly, an intermediate transmission tooth, and a ball screw. The gear transmission assembly drives the worm to rotate through the motor, driving the helical gear assembly to transmit. One end of the helical gear assembly is meshed with the intermediate transmission tooth. The helical gear assembly drives the intermediate transmission tooth to rotate. The intermediate transmission tooth is meshed with the ball screw for transmission. The ball screw controls the forward and backward movement of the locking rod. A locking rod, wherein the locking rod is connected to the ball screw through a locking rod fixing member, and the locking rod is locked or unlocked along with the axial movement of the ball screw; The manual unlocking pull rope is connected to the lock rod through the emergency unlocking pull hook. When the pull rope is pulled, the emergency unlocking pull hook is separated from the lock rod to achieve manual unlocking; A signal feedback component, including a signal feedback PCBA board, is used to detect the locked and unlocked states of the lock rod and feed back the signal to the control end; The upper cover cooperates with the bottom shell to encapsulate the device and protect internal components.

[0008] As a preferred technical solution, the motor, worm and bevel gear assembly are installed on a bracket, and the motor drives the worm to rotate, and drives the bevel gear assembly to transmit, and further drives the ball screw to rotate to control the movement of the locking rod.

[0009] As a preferred technical solution, the locking rod is mounted on the ball screw via a locking rod fixing member, and moves axially with the rotation of the ball screw, thereby realizing the locking or unlocking function.

[0010] As a preferred technical solution, the emergency unlocking hook is separated from the motor and gear transmission assembly by the emergency unlocking hook reset spring. During manual unlocking, the pull rope pulls the emergency unlocking hook backward to separate the ball clutch from the ball screw to achieve manual unlocking.

[0011] As a preferred technical solution, the sealing gasket is sleeved on the locking rod to prevent moisture and other external contaminants from entering the interior of the device, thereby improving the waterproof performance of the device.

[0012] As a preferred technical solution, the signal feedback component cooperates with the lock rod fixing piece through a signal feedback PCBA board to detect the movement state of the lock rod and provide locking or unlocking signal feedback.

[0013] As a preferred technical solution, the ball screw and the locking rod are connected by a clutch structure. In the clutch state, the locking rod is separated from the motor transmission assembly. In the non-clutch state, the locking rod is engaged with the ball screw and moves with the rotation of the ball screw.

[0014] As a preferred technical solution, the ball clutch always presses against the ball under the action of the emergency unlocking hook reset spring to prevent the ball from separating from the ball screw.

[0015] As a preferred technical solution, when the electronic lock is in the process of locking or unlocking, the motor drives the ball screw to rotate, the locking rod fixing piece moves along the screw, and the locking rod moves with the fixing piece to complete the locking or unlocking action.

[0016] As a preferred technical solution, a sealing gasket is also included, and the sealing gasket is sleeved on the locking rod for sealing and waterproofing.

[0017] The beneficial effects of the present invention are as follows: the present invention provides an electronic locking device for new energy vehicles, which adopts a worm gear / helical gear-worm-ball screw structure, greatly improving the holding force of the locking device and the accuracy of the lock rod movement, and effectively preventing the accidental drawing of the gun or theft of the gun. The structural design can prevent the lock rod from rebounding during the locking or unlocking process, ensure the stability of the locking state, reduce the signal loss problem caused by the lock rod rebound, and thus improve the reliability and safety of the entire system.

[0018] The clutch structure design is adopted between the transmission system and the lock rod in the present invention, so that the entire transmission mechanism does not need to be driven during manual emergency unlocking. The lock rod can be separated and unlocked by pulling the pull rope, which reduces the operating force required for manual unlocking and is particularly suitable for special environments such as low temperatures. At the same time, the design effectively avoids long-term friction between the pull rope and the transmission mechanism and the seal, prolongs the service life of the pull rope and the sealing assembly, and improves the waterproof performance and reliability of the entire device.

[0019] In addition, the present invention adopts a modular design, which simplifies the assembly process by integrating components, facilitates automated production, improves production efficiency, and reduces manufacturing costs. Modularity also facilitates later maintenance and replacement of parts, further improving the practicality and maintainability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the general assembly structure of the present invention; Figure 2 It is a schematic structural diagram of the gear transmission assembly of the present invention; Figure 3 The non-clutch state of the present invention Figure 1 ; Figure 4 The non-clutch state of the present invention Figure 2 ; Figure 5 The clutch state of the present invention Figure 1 ; Figure 6 The clutch state of the present invention Figure 2 ; Figure 7 The electric locking state of the present invention Figure 1 ; Figure 8 The electric locking state of the present invention Figure 2 ; Fig. 9 The electric unlocking state of the present invention Figure 1 ; Fig.10 The electric unlocking state of the present invention Figure 2 . DETAILED DESCRIPTION

[0022] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0023] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0024] like Figure 1 As shown, an electronic locking device for a new energy vehicle of the present invention comprises a bottom shell (3) for accommodating various internal components; The gear transmission assembly 1 includes a motor 9, a worm 10, a helical gear assembly 11, an intermediate transmission tooth 22, and a ball screw 18. The gear transmission assembly 1 drives the worm 10 to rotate through the motor 9, driving the helical gear assembly 11 to transmit. One end of the helical gear assembly 11 is meshed with the intermediate transmission tooth. The helical gear assembly 11 drives the intermediate transmission tooth 22 to rotate. The intermediate transmission tooth 22 is meshed with the ball screw 18 for transmission. The ball screw 18 controls the forward and backward movement of the locking rod 4. A locking rod 4, which is connected to the ball screw 18 via a locking rod fixing member 21, and the locking rod is locked or unlocked along with the axial movement of the ball screw; The manual unlocking pull rope 15 is connected to the locking rod 4 through the emergency unlocking pull hook 17. When the pull rope is pulled, the emergency unlocking pull hook 17 is separated from the locking rod to achieve manual unlocking; A signal feedback component, including a signal feedback PCBA board 2, is used to detect the locked and unlocked states of the lock rod and feed back the signal to the control end; The upper cover 7 cooperates with the bottom case 3 to encapsulate the device and protect the internal components.

[0025] Specifically, Figure 1 As shown, the gear transmission assembly 1 and the signal feedback PCBA board 2 are assembled and fixed to the bottom shell 3; the lock rod 4 is fixed to the gear transmission assembly 1 through a pin, and the sealing gasket 5 is inserted into the lock rod for sealing and waterproofing; then the emergency unlocking mechanism 6 is assembled into the bottom shell 3, and after all components are assembled, the upper cover 7 is assembled with the bottom shell 3, and finally the connector cable assembly 8 is assembled to the tail connector in the gear transmission assembly 1 in the groove of the upper cover 7.

[0026] like Figure 2 As shown, the transmission in the gear transmission assembly 1 is assembled in the bracket 12 through the motor 9, the worm 10, and the bevel gear assembly 11, and then powered by the gear transmission assembly PCBA board 13, and the transmission is carried out in conjunction with the screw motion assembly 14. The screw motion assembly 14 adopts a ball screw clutch structure, which can separate the connection between the motor 9, the worm 10, the bevel gear assembly 11 and the lock rod 4 in the manual unlocking state, thereby improving the reliability of manual unlocking and reducing the manual emergency unlocking force. The application of the worm wheel (bevel gear) worm principle in the whole gear transmission assembly can increase the lock rod ejection force, increase the lock rod holding force, and prevent the lock rod of the locking mechanism from rebounding.

[0027] like Figure 3-Figure 6 As shown, when the electronic lock is in a non-clutch state, the ball clutch 20 always supports the ball 24 under the action of the emergency unlocking hook reset spring 19 to prevent the ball 24 from separating from the ball screw 18. When the electronic locking device performs an electric locking / unlocking action, the motor 9 drives the ball screw 18 to rotate, and then drives the lock rod fixing member 21 to move forward / backward, and the lock rod 4 assembled on the screw motion assembly 14 moves forward / backward with the movement of the lock rod fixing member 21, thereby achieving the purpose of locking / unlocking. Under normal conditions, the pull rope 15 assembled on the emergency unlocking hook 17 is separated from the motor 9 screw motion assembly 14 under the action of the emergency unlocking hook reset spring 16, and does not move with the movement of the lock rod 4. When the electronic locking device performs the manual emergency unlocking action, the pull rope 15 drives the emergency unlocking hook 17 to move backward, and the ball clutch 20 to move backward. The ball 24 that moves backward is squeezed outward by the stationary ball screw 18, so that the ball 24 is separated from the ball screw 18, thereby separating the lock rod 4 from the motor 9. At this time, pulling the pull rope 15 can drive the lock rod 4 to move backward to achieve the purpose of unlocking. The pull rope 15 compresses the emergency unlocking hook reset spring 16 and the emergency unlocking hook reset spring 19 during the process of driving the lock rod 4 to move backward. When the pull rope 15 is released, the emergency unlocking hook 17 is reset by the emergency unlocking hook reset spring 16, and the ball clutch 20 is retracted to the initial state by the emergency unlocking hook reset spring 19, thereby pushing the ball 24 back to the meshing state with the ball screw 18, and the electronic lock returns to the non-clutch state, and the electronic lock can be normally locked / unlocked electrically.

[0028] like Figure 7 and Figure 8 As shown, during the normal electric power-on process, the ball clutch 20 always holds the ball 24 under the action of the emergency unlocking hook reset spring 19 to prevent the ball 24 from separating from the ball screw 18. When the electronic locking device performs the electric locking action, the motor 9 drives the ball screw 18 to rotate, and then drives the lock rod fixing part 21 to move forward, and the lock rod 4 assembled on the screw motion component 14 moves forward with the lock rod fixing part 21 to achieve the locking purpose. At the same time, the lock rod fixing part 21 triggers the signal feedback PCBA board 2 during the forward movement process, and feeds back the locked in place signal to the control end. At this time, the pull rope 15 fixed on the emergency unlocking hook 17 is separated from the motor 9 screw motion component 14 under the action of the emergency unlocking hook reset spring 16, and does not move with the movement of the lock rod.

[0029] like Fig. 9 and Fig.10 As shown, during the normal electric power-on process, the ball clutch 20 always holds the ball 24 under the action of the emergency unlocking hook reset spring 19 to prevent the ball 24 from separating from the ball screw 18. When the electronic locking device performs the electric unlocking action, the motor 9 drives the ball screw 18 to rotate, and then drives the lock rod fixing member 21 to move backward, and the lock rod 4 assembled on the screw motion assembly 14 moves backward with the lock rod fixing member 21 to achieve the unlocking purpose. At the same time, the lock rod fixing member 21 triggers the signal feedback PCBA board 2 during the backward movement process, and feeds back the unlocking in place signal to the control end. At this time, the pull rope 15 fixed on the emergency unlocking hook 17 is separated from the motor 8 screw motion assembly 14 under the action of the emergency unlocking hook reset spring 16, and does not move with the movement of the lock rod.

[0030] The basic working principle is as follows: The ball is installed in the upper limit of the ball sleeve, and then the ball clutch is put on the ball to fix the limit, and then the emergency unlocking hook reset spring is installed to push the ball clutch forward so that the ball clutch presses the ball, and then it is installed in the fixing part. After the final product is made, the locking rod is installed on the locking rod fixing part and fixed to the locking rod fixing part with a pin 25. Unlocking means that the locking rod fixing part is pulled back by the emergency unlocking hook, compressing the spring, and then disengaging the ball. This locking rod fixing part also has a function of triggering a micro switch signal to feedback the position of the electronic lock locking rod, whether it is locked or unlocked, that is, triggering the signal feedback PCBA board as signal feedback.

[0031] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. An electronic locking device for a new energy vehicle, characterized in that: include: A bottom shell (3) for accommodating various internal components; A gear transmission assembly (1), comprising a motor (9), a worm (10), a helical gear assembly (11), intermediate transmission teeth (22), and a ball screw (18), wherein the gear transmission assembly (1) drives the worm (10) to rotate through the motor (9), thereby driving the helical gear assembly (11) to transmit, wherein one end of the helical gear assembly (11) meshes with the intermediate transmission teeth, and the helical gear assembly (11) drives the intermediate transmission teeth (22) to rotate, wherein the intermediate transmission teeth (22) mesh with the ball screw (18) for transmission, and the ball screw (18) controls the forward and backward movement of the locking rod (4); A locking rod (4), the locking rod being connected to the ball screw (18) via a locking rod fixing member (21), the locking rod being locked or unlocked along with the axial movement of the ball screw; A manual unlocking pull rope (15) is connected to the locking rod (4) via an emergency unlocking pull hook (17); when the pull rope is pulled, the emergency unlocking pull hook (17) is disengaged from the locking rod, thereby achieving manual unlocking; A signal feedback component, comprising a signal feedback PCBA board (2), used for detecting the locked and unlocked states of the lock rod and feeding back the signal to the control end; A ball clutch (20) is mounted on the outside of the ball sleeve (23), and one or more balls (24) are mounted in the ball sleeve (23), and the balls (24) are pressed tightly by the ball clutch (20); The upper cover (7) cooperates with the bottom shell (3) to encapsulate the device and protect internal components.

2. The new locking device for new energy vehicles according to claim 1 is characterized in that: The motor (9), worm (10) and bevel gear assembly (11) are mounted on a bracket (12). The motor drives the worm to rotate, which in turn drives the bevel gear assembly to transmit, and further drives the ball screw (18) to rotate, thereby controlling the movement of the locking rod (4).

3. The new locking device for new energy vehicles according to claim 1 is characterized in that: The locking rod (4) is mounted on the ball screw (18) via a locking rod fixing member (21), and moves axially with the rotation of the ball screw, thereby realizing a locking or unlocking function.

4. The new locking device for new energy vehicles according to claim 1 is characterized in that: The emergency unlocking hook (17) is separated from the motor (9) and the gear transmission assembly by the emergency unlocking hook reset spring (16). When manually unlocking, the pull rope (15) pulls the emergency unlocking hook (17) backward, so that the ball clutch (20) is separated from the ball screw (18), thereby realizing manual unlocking.

5. The new type locking device for new energy vehicles according to claim 1 is characterized in that: The sealing pad (5) is sleeved on the locking rod (4) and is used to prevent moisture and other external contaminants from entering the interior of the device, thereby improving the waterproof performance of the device.

6. The new type locking device for new energy vehicles according to claim 1 is characterized in that: The signal feedback component cooperates with the lock rod fixing member (21) via the signal feedback PCBA board (2) to detect the movement state of the lock rod and provide locking or unlocking signal feedback.

7. The new type locking device for new energy vehicles according to claim 1 is characterized in that: The ball screw (18) and the lock rod (4) are connected via a clutch structure; in a clutched state, the lock rod (4) is separated from the motor transmission assembly; in a non-clutched state, the lock rod (4) is engaged with the ball screw (18) and moves with the rotation of the ball screw.

8. The new type locking device for new energy vehicles according to claim 1 is characterized in that: The ball clutch (20) always presses against the ball (24) under the action of the emergency unlocking hook return spring (19) to prevent the ball (24) from being separated from the ball screw (18).

9. The new type locking device for new energy vehicles according to claim 1 is characterized in that: When the electronic lock is in the process of locking or unlocking, the motor (9) drives the ball screw (18) to rotate, the locking rod fixing member (21) moves along the screw, and the locking rod (4) moves along with the fixing member (21) to complete the locking or unlocking action.

10. The new type locking device for new energy vehicles according to claim 1 is characterized in that: It also comprises a sealing pad (5), which is sleeved on the locking rod and is used for sealing and waterproofing.

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