Electronic lock structure

Abstract

The electronic lock structure comprises a shell, a transmission assembly, a lock rod and a PCB, the transmission assembly, the lock rod and the PCB are arranged in the shell, the transmission assembly comprises a motor and a gear assembly, the gear assembly comprises a cam gear, the lock rod is connected with the cam gear and moves in the axial direction of an output shaft of the motor under driving of the cam gear, and the PCB is in signal connection with the lock rod. According to the electronic lock structure, the output rotating speed of the motor is reduced, the output torque is increased, the ejection force of the lock rod is increased, the safety requirement, the icebreaking requirement and the requirement for different signals are met, only the PCB needs to be adjusted or replaced, the electronic lock structure can be widely applied to different vehicle types, the emergency unlocking assembly does not move along with the lock rod, abrasion loss is reduced, and the service life is prolonged. The electronic lock is compact in design, and the size of the electronic lock can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of new energy vehicle charging, and in particular to an electronic lock structure. Background Art

[0002] During the charging process of an electric vehicle, the charging gun is locked with an electronic lock to prevent it from being pulled out by external force. After charging is completed, the lock rod returns to complete the unlocking, and the charging gun can be pulled out. In addition, an emergency unlocking component is generally installed to ensure timely emergency unlocking when encountering difficulties.

[0003] The electronic locks in the prior art have the following defects: First, due to the need to convert the rotational motion of the motor into linear motion, the ejection force of the lock rod in the final position is relatively small, resulting in insufficient force to lock the charging gun, and the charging gun is easily pulled out, which poses a risk to safety in use. In addition, due to the small ejection force, when it is exposed to water at low temperatures, it cannot break the ice, resulting in a failure to lock and a functional failure. Secondly, the emergency unlocking component often moves with the lock rod, which increases the wear of the emergency unlocking component, affects its service life, and increases the complexity of signal feedback. Thirdly, new energy vehicles of different brands have different signal requirements for electronic locks, and the signal change positions are also different. If electronic locks are designed separately for new energy vehicles of different brands, the cost of the product will be too high. Finally, the electronic locks in the prior art are relatively large in size, high in cost, and not emergency and compact enough. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an electronic lock structure, whose lock rod has a large top output force and meets the safety requirements of use; according to different signal requirements, only the PCB board needs to be adjusted, and there is no need to redesign a new electronic lock; during the normal locking and unlocking process of the electronic lock, the emergency unlocking component does not move with the lock rod; and the design is compact, which is conducive to reducing the volume of the electronic lock.

[0005] In order to solve the above technical problems, the electronic lock structure provided by the utility model includes:

[0006] case;

[0007] A transmission assembly, which is installed in the housing and includes a motor and a gear assembly, wherein the motor drives the gear assembly to rotate, and the gear assembly includes a cam gear;

[0008] A locking rod, which is disposed in the housing and connected to the cam gear and moves axially along the output shaft of the motor under the drive of the cam gear;

[0009] A PCB board is mounted on the housing and is connected to the locking rod signal.

[0010] Preferably, the cam gear comprises a cam end and a gear end which are coaxially arranged, the diameter of the gear end is larger than the diameter of the cam end, and the cam end is provided with a helical line with a lead angle direction which is the same as the axial direction of the cam end;

[0011] A connecting rod is provided at the bottom of the locking rod, which cooperates with the spiral line to convert the rotation of the cam gear into the linear motion of the locking rod.

[0012] Preferably, the output shaft sleeve of the motor is provided with a motor gear;

[0013] The gear assembly also includes a first double gear and a second double gear that are meshed, wherein the large gear of the first double gear is meshed with the motor gear, the small gear of the first double gear is meshed with the large gear of the second double gear, and the small gear of the second double gear is meshed with the gear end of the cam gear.

[0014] Preferably, the PCB board is provided with a contact track, and the locking rod is provided with a sliding claw, and the movement of the locking rod drives the sliding claw to slide on the contact track.

[0015] Preferably, an emergency unlocking assembly is also installed in the housing, which includes a connected pull rod and a pull rope, and a first limiter and a second limiter arranged on the housing, a spring is arranged between the bottom end of the pull rod and the first limiter, one end of the spring is installed on the first limiter, and the other end of the spring presses the pull rod against the second limiter;

[0016] The first limiting member is provided with a limiting hole, and the pull rope passes through the limiting hole and the spring in sequence, and is connected to the bottom end of the pull rod.

[0017] Preferably, the top of the pull rod is bent to form a hook portion, and a protrusion is provided at the bottom of the locking rod. When the pull rope is pulled, the hook portion drives the locking rod to retract through the protrusion for emergency unlocking.

[0018] Preferably, a first sealing ring is provided in the limiting hole.

[0019] Preferably, the shell includes an upper shell and a lower shell, the upper shell cover is arranged on the lower shell, and the transmission assembly, the locking rod, the PCB board and the emergency unlocking assembly are arranged on the lower shell.

[0020] Preferably, a through hole cooperating with the locking rod is formed on the side wall of the lower shell, a second sealing ring is embedded in the inner wall of the through hole, and the second sealing ring is in movable contact and cooperation with the locking rod.

[0021] Preferably, the lower shell is also provided with a cover, and the cover is arranged at the opening of the through hole toward the outer side of the lower shell.

[0022] The utility model provides an electronic lock structure, which converts the rotational motion of a motor into the linear motion of a lock rod through a gear assembly, and reduces the rotational speed and increases the output torque through a first double gear, a second double gear and a cam gear, thereby increasing the ejection force of the lock rod, making it difficult to be pulled out during charging, improving its safety requirements for use, and meeting the ice-breaking requirements at the same time; the utility model only needs to adjust or replace the PCB board to meet the signal requirements of different vehicle models, without the need to redesign a new electronic lock structure, thereby reducing research and development costs and having a wide range of applications; at the same time, the emergency unlocking component does not move with the lock rod, reducing wear and loss, and is conducive to providing the service life of the emergency unlocking component; in addition, the utility model has a compact design, which is conducive to reducing the size of the electronic lock. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the utility model, the following briefly introduces the drawings required for use in the utility model. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of an embodiment of the electronic lock structure of the utility model;

[0025] Figure 2 This is an exploded view of an embodiment of the electronic lock structure of the utility model;

[0026] Figure 3 It is a schematic diagram of a transmission component of an embodiment of an electronic lock structure of the utility model;

[0027] Figure 4 This is a schematic diagram of the cooperation between the lock rod and the cam gear of an embodiment of the electronic lock structure of the utility model;

[0028] Figure 5 It is a schematic diagram of the lower housing of an embodiment of the electronic lock structure of the utility model;

[0029] Figure 6 This is a schematic diagram of the cooperation between the PCB board and the sliding claw of an embodiment of the electronic lock structure of the utility model;

[0030] Figure 7 1 is a schematic diagram of a locked state of an embodiment of an electronic lock structure of the utility model, wherein only the emergency unlocking assembly and the locking rod are shown in the lower housing;

[0031] Figure 8 1 is a schematic diagram of an emergency unlocking state of an embodiment of an electronic lock structure of the present utility model, wherein only the emergency unlocking assembly and the lock rod are shown in the lower housing;

[0032] Fig. 9 It is a schematic diagram of an emergency unlocking assembly returning to an initial state after emergency unlocking is completed in an embodiment of an electronic lock structure of the present utility model, wherein only a schematic diagram of the emergency unlocking assembly and the lock rod in the lower housing is shown.

[0033] In the figure, 1-shell; 11-upper shell; 12-lower shell; 13-through hole; 14-second sealing ring; 15-cover; 16-first limiter; 17-second limiter; 121, 122, 123, 124-terminals; 161-first sealing ring; 2-transmission assembly; 21-motor; 22-cam gear; 23-first double gear; 24-second double gear; 25-gear assembly; 211-motor gear; 221-cam end; 222-gear end; 2211-helix; 3-locking rod; 31-connecting rod; 32-protrusion; 33-sliding claw; 4-PCB board; 41-contact track; 5-emergency unlocking assembly; 51-pull rod; 52-pull rope; 53-spring; 511-hook. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] refer to Figure 1-6 , shows an electronic lock structure of the utility model, including:

[0036] case;

[0037] A transmission assembly, which is installed in the housing and includes a motor and a gear assembly, wherein the motor drives the gear assembly to rotate, and the gear assembly includes a cam gear;

[0038] A locking rod, which is disposed in the housing and connected to the cam gear and moves axially along the output shaft of the motor under the drive of the cam gear;

[0039] A PCB board is mounted on the housing and is connected to the locking rod signal.

[0040] Preferably, the cam gear comprises a cam end and a gear end which are coaxially arranged, the diameter of the gear end is larger than the diameter of the cam end, and the cam end is provided with a helical line with a lead angle direction which is the same as the axial direction of the cam end;

[0041] A connecting rod is provided at the bottom of the locking rod, which cooperates with the spiral line to convert the rotation of the cam gear into the linear motion of the locking rod.

[0042] In the embodiment of the utility model, the cam gear converts the drive of the motor into the linear motion of the lock rod, and by setting the diameter of the gear end larger than the diameter of the cam end, and setting the spiral line at the cam end of the cam, the output torque is increased and the speed is reduced, especially the increase of the output torque, which can make the lock rod have a greater ejection force, ensuring that the charging gun is not easy to be pulled out during normal use, and when low temperature meets water, it can also play the role of breaking ice, meeting normal use conditions. In addition, the function of the PCB board of the utility model is to realize the transmission of lock rod information (such as position information or resistance information). For new energy vehicles of different brands or signals, it only needs to be replaced with the corresponding PCB board, without the need to redesign the entire electronic lock structure, reducing the R&D cost and production cost, and improving the competitiveness of the product. It should be noted that by reducing the rise angle of the spiral line, the ejection force of the lock rod can be further improved. The deeper the depth of the spiral line, the closer the connecting rod is to the axial direction of the cam end, and it is more conducive to increasing the ejection force of the lock rod.

[0043] In a specific embodiment, reference Figure 3 , the output shaft sleeve of the motor is provided with a motor gear;

[0044] The gear assembly also includes a first double gear and a second double gear that are meshed, wherein the large gear of the first double gear is meshed with the motor gear, the small gear of the first double gear is meshed with the large gear of the second double gear, and the small gear of the second double gear is meshed with the gear end of the cam gear.

[0045] In this specific embodiment, the diameter of the motor gear is preferably smaller than the diameter of the large gear of the first double gear. The force output by the motor is converted by the first double gear, the second double gear and the cam gear, which greatly reduces the rotation speed and greatly increases the torque, further improving the ejection force of the locking rod.

[0046] In a specific embodiment, reference Figure 6 , the PCB board is provided with a contact track, the locking rod is provided with a sliding claw, and the movement of the locking rod drives the sliding claw to slide on the contact track. In this specific implementation, the sliding claw is installed on the locking rod, and when the locking rod moves during the unlocking or locking process, it drives the sliding claw to move synchronously, and the contact position of the sliding claw and the contact rail changes, and then the PCB board transmits the information to the new energy electric vehicle or the signal receiving device. It is not desired to be constrained by this, and the signal transmission method between the locking rod and the PCB board can also be a grating component, a Hall component, etc., which can be achieved here by the existing technology and will not be repeated.

[0047] In a specific embodiment, reference Figure 1-2 , 7-9 An emergency unlocking assembly is also installed in the shell, which includes a connected pull rod and a pull rope, and a first limit piece and a second limit piece arranged on the shell, a spring is arranged between the bottom end of the pull rod and the first limit piece, one end of the spring is installed on the first limit piece, and the other end of the spring presses the pull rod against the second limit piece; the first limit piece has a limit hole (not shown), and the pull rope passes through the limit hole and the spring in sequence, and is connected to the bottom end of the pull rod.

[0048] Preferably, the top of the pull rod is bent to form a hook portion, and a protrusion is provided at the bottom of the locking rod. When the pull rope is pulled, the hook portion drives the locking rod to retract through the protrusion for emergency unlocking.

[0049] In this specific implementation mode, reference Figure 7 During the charging process (locked state) or waiting for charging (unlocked state) of the charging gun, the pull rod is always pressed against the second limiter (that is, the top of the pull rod is close to the side wall of the through hole of the lower shell) under the action of the spring, and when the lock rod moves, the emergency unlocking component does not move with the lock rod, which can effectively reduce the wear of the emergency unlocking component and ensure its service life; when an emergency occurs and emergency unlocking is required, refer to Figure 8 , the motor is in the power-off state, manually pull the pull rope, the pull rope passes through the hook of the pull rod, hooks the raised part of the lock rod, and moves in the unlocking direction with the pull rope to achieve emergency unlocking (in this process, the spring will be compressed). It should be noted that during the movement, the connecting rod of the lock rod drives the transmission components including the cam gear to rotate together through the spiral line. Since the motor is in the power-off state, the rotation of the transmission components and the motor gear is not restricted by resistance, and emergency unlocking can be achieved without too much pulling force; after the emergency unlocking is completed, refer to Fig. 9 Under the action of the spring, the pull rod drives the pull rope to return to the initial position, and the locking rod is in the unlocking position.

[0050] In a specific embodiment, the housing comprises an upper housing and a lower housing, the upper housing is covered on the lower housing, and the transmission assembly, the locking rod, the PCB board and the emergency unlocking assembly are arranged on the lower housing. Figure 5 The lower shell is usually provided with terminals, such as terminals (121 and 122) for connecting to PCB board signals, which output the position and / or resistance signal of the PCB board through a connector (not shown); another example is terminals (123 and 124) for connecting to motor signals, which realize the conduction of the motor through a connector 125.

[0051] In a specific embodiment, a first sealing ring is arranged in the limiting hole. It can be understood that by providing the first sealing ring, the sealing between the pull rope and the limiting hole can be increased to ensure the sealing environment inside the housing.

[0052] In a specific embodiment, a through hole cooperating with the locking rod is provided on the side wall of the lower shell, a second sealing ring is embedded in the inner wall of the through hole, and the second sealing ring is in movable contact and cooperation with the locking rod. Preferably, the lower shell is also provided with a cover, and the cover is arranged at the opening of the through hole toward the outside of the lower shell. It is understandable that the top of the locking rod needs to be outside the shell at least in the locked state, therefore, a through hole is provided at the corresponding position of the shell (lower shell) to allow the locking rod to pass through; in order to ensure a sealed environment inside the shell, it is preferred to provide a cover and a second sealing ring at the position of the through hole, for example, the second sealing ring can be embedded in the inner wall of the through hole, but protrudes relative to the inner wall of the through hole so as to contact with the locking rod.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electronic lock structure, characterized in that: include: case; A transmission assembly, which is installed in the housing and includes a motor and a gear assembly, wherein the motor drives the gear assembly to rotate, and the gear assembly includes a cam gear; A locking rod, which is disposed in the housing and connected to the cam gear and moves axially along the output shaft of the motor under the drive of the cam gear; A PCB board is mounted on the housing and is connected to the locking rod signal.

2. The electronic lock structure according to claim 1, characterized in that: The cam gear comprises a cam end and a gear end which are coaxially arranged, the diameter of the gear end is larger than the diameter of the cam end, and the cam end is provided with a helical line whose lead angle direction is the same as the axial direction of the cam end; A connecting rod is provided at the bottom of the locking rod, which cooperates with the spiral line to convert the rotation of the cam gear into the linear motion of the locking rod.

3. The electronic lock structure according to claim 1, characterized in that: The output shaft sleeve of the motor is provided with a motor gear; The gear assembly also includes a first double gear and a second double gear that are meshed, wherein the large gear of the first double gear is meshed with the motor gear, the small gear of the first double gear is meshed with the large gear of the second double gear, and the small gear of the second double gear is meshed with the gear end of the cam gear.

4. The electronic lock structure according to claim 1, characterized in that: The PCB board is provided with a contact track, and the locking rod is provided with a sliding claw, and the movement of the locking rod drives the sliding claw to slide on the contact track.

5. The electronic lock structure according to claim 1, characterized in that: An emergency unlocking assembly is also installed in the housing, which includes a connected pull rod and a pull rope, and a first limiter and a second limiter arranged on the housing, a spring is arranged between the bottom end of the pull rod and the first limiter, one end of the spring is installed on the first limiter, and the other end of the spring presses the pull rod against the second limiter; The first limiting member is provided with a limiting hole, and the pull rope passes through the limiting hole and the spring in sequence, and is connected to the bottom end of the pull rod.

6. The electronic lock structure according to claim 5, characterized in that: The top of the pull rod is bent to form a hook portion, and the bottom of the lock rod is provided with a protrusion. When the pull rope is pulled, the hook portion drives the lock rod to retract through the protrusion to unlock the lock rod urgently.

7. The electronic lock structure according to claim 5, characterized in that: A first sealing ring is arranged in the limiting hole.

8. The electronic lock structure according to claim 5, characterized in that: The housing comprises an upper housing and a lower housing, the upper housing cover is arranged on the lower housing, and the transmission assembly, the locking rod, the PCB board and the emergency unlocking assembly are arranged on the lower housing.

9. The electronic lock structure according to claim 8, characterized in that: A through hole cooperating with the locking rod is formed on the side wall of the lower shell, a second sealing ring is embedded in the inner wall of the through hole, and the second sealing ring is in movable contact with the locking rod.

10. The electronic lock structure according to claim 9, characterized in that: The lower shell is also equipped with a cover, which is arranged at the opening of the through hole toward the outer side of the lower shell.

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