阅读说明：本技术 电子锁止装置及带有该电子锁止装置的充电系统 (Electronic locking device and charging system with same ) 是由 周骁 唐艳荣 于 2020-06-23 设计创作，主要内容包括：本发明涉及一种用于新能源汽车的充电系统的电子锁止装置。另外,本发明还涉及一种具有该电子锁止装置的充电系统。该电子锁止装置具有壳体(1)和设置在壳体(1)中的电机(2)、传动组件和锁止杆(7),该电机(2)能通过传动组件驱动锁止杆(7)在锁止位置和休止位置之间直线运动,其中,所述传动组件包括多级齿轮减速结构,该多级齿轮减速装置的输出端与锁止杆(7)通过一转动平动转换机构机械耦联。通过该电子锁止装置能提供较大的推力,避免发生热卡滞并且保持最终产品的尺寸较小,有利于安装布置。(The invention relates to an electronic locking device for a charging system of a new energy automobile. In addition, the invention also relates to a charging system with the electronic locking device. The electronic locking device comprises a shell (1), and a motor (2), a transmission assembly and a locking rod (7) which are arranged in the shell (1), wherein the motor (2) can drive the locking rod (7) to move linearly between a locking position and a rest position through the transmission assembly, the transmission assembly comprises a multi-stage gear reduction structure, and the output end of the multi-stage gear reduction device is mechanically coupled with the locking rod (7) through a rotating translation conversion mechanism. Can provide great thrust through this electron locking means, avoid taking place the thermal clamping stagnation and keep the size of final product less, be favorable to the installation to be arranged.)

1. An electronic locking device, the electronic locking device has body (1) and motor (2), drive assembly and lock pole (7) set up in body (1), this motor (2) can drive the lock pole (7) to move in a straight line between locking position and rest position through the drive assembly, characterized by that, the said drive assembly includes the reduction gear of the multi-step gear, the output end of the reduction gear of the multi-step gear mechanically couples with lock pole (7) through a conversion mechanism of a rotational translation.

2. The electronic locking device of claim 1, wherein the multi-stage gear reduction structure is a three-stage gear reduction structure having an overall reduction ratio of between 13 and 16.

3. The electronic locking device according to claim 1 or 2, wherein the three-stage gear reduction structure comprises a first pinion gear (3), a first duplicate gear structure (4), a second duplicate gear structure (5), and a third duplicate gear structure (6) provided on the output shaft of the motor, each duplicate gear structure comprising one large gear and one small gear, wherein the big gear and the small gear in each duplicate gear structure are rigidly connected in a mode of incapable of rotating relatively, wherein the first pinion (3) is meshed with a gearwheel (41) of the first duplicate gear structure (4), the pinion (42) of the first duplicate gear structure (4) is meshed with a gearwheel (51) of the second duplicate gear structure (5), the pinion (52) of the second double gear structure is in turn in mesh with a gearwheel (61) of the third double gear structure (6).

4. Electronic locking device according to claim 1 or 2, characterized in that the rotary-translational conversion mechanism comprises a male thread formed on one end of the locking lever (7) and a corresponding female thread formed on the inner wall of the sleeve (16), wherein the sleeve (16) is rigidly connected to the third double gear structure (6) in a rotationally fixed manner.

5. Electronic locking device according to claim 1 or 2, characterised in that one end of the locking rod (7) is configured as a hollow cylinder, on the inner wall of which a female thread is provided, while the third double gear structure (6) has a shaft end with a corresponding male thread.

6. Electronic locking device according to claim 1 or 2, characterized in that it further comprises a microswitch (15) and a position sensor (14), by means of which position sensor (14) the position of the locking lever (7) can be detected.

7. The electronic locking device according to claim 1 or 2, characterized in that it further comprises an emergency unlocking mechanism mechanically coupled to the pinion (62) of the third double gear structure (6).

8. Electronic locking device according to claim 7, characterized in that the emergency unlocking mechanism comprises a sector gear (12), a transmission shaft (8), a handle (11) and a fourth double gear structure (13), wherein the sector gear (12) and the handle (11) are fixed at both ends of the transmission shaft (8), respectively, wherein the sector gear can be placed in mesh with a pinion (132) of the fourth double gear structure (13), wherein a gearwheel (131) of the fourth double gear structure can be in mesh with a pinion (62) of the third double gear structure (6).

9. A charging system for an electric vehicle, wherein the charging system has a charging plug and a charging socket, characterized in that the charging system further comprises at least one electronic locking device according to one of the above embodiments.

10. The charging system of claim 9, wherein the electronic locking device is disposed on at least one of a charging plug and a charging socket.

Technical Field

The invention belongs to the field of new energy automobile spare and accessory parts, and particularly relates to an electronic locking device which is used for a charging system of a new energy automobile. In addition, the invention also relates to a charging system with the electronic locking device.

Background

In recent years, new energy automobiles are actively developed in various countries around the world due to various aspects of energy, environmental protection and the like. Nowadays, electric vehicles represented by hybrid electric vehicles and pure electric vehicles have gradually become the key point of the development of the automobile industry, and have a certain trend of replacing the existing fuel vehicles. For reasons of safety, law and regulation, or industry standards, etc., when charging an electric vehicle, it is necessary to avoid accidental disconnection of the charging gun, and therefore an electronic locking device is required. In designing such an electronic locking device, it is necessary to take into consideration a possible circuit failure or the like, for example, to provide a manual unlocking function.

Various electronic locking devices for charging systems of new energy vehicles are known from the prior art and are known. For example, in patent document CN207381641U, an electronic lock device for a charging gun is disclosed, which comprises a housing, and a driving assembly, a transmission assembly, a sector gear and a locking pin mounted inside the housing; the sector gear is rotatably arranged in the shell, and a connecting piece is arranged at the eccentric position of the sector gear; the connecting piece can slide in the connecting hole at the bottom of the locking pin; the locking pin is connected with the shell in a sliding mode, and the top end of the locking pin can be connected with the lock hole to be locked or separated from the lock hole to be unlocked; the output end of the driving component is in transmission connection with the input end of the transmission component, and the output end of the transmission component is in transmission connection with the sector gear.

However, the driving transmission scheme of the electronic locking device disclosed in the prior art can be basically divided into two types, i.e., a combination of a solenoid and an electromagnet or a combination of a motor and a rack and pinion. In the combination of the solenoid and the electromagnet, the thrust of the electronic lock device is small, and thermal seizure easily occurs. The products including the motor and the rack and pinion are generally large in size, which is not favorable for installation and arrangement.

It is therefore desirable to provide an improved electronic locking device that overcomes the above-mentioned problems of the prior art, while having a smaller size, allowing for a more flexible arrangement, while providing a greater pushing force than the products of the prior art.

Disclosure of Invention

It is an object of the present invention to provide an electronic locking device of the aforementioned type and a charging system having the same, by which one or more of the above-mentioned technical problems occurring in the prior art can be solved.

According to one aspect of the invention, the above object is achieved by an electronic locking device having a housing and, arranged in the housing, an electric motor, a transmission assembly and a locking lever, the electric motor being able to drive the locking lever by means of the transmission assembly in a linear movement between a locking position and a rest position, wherein the transmission assembly comprises a multi-stage gear reduction, the output of which is mechanically coupled to the locking lever by means of a rotary-translational conversion mechanism.

Preferably, the multi-stage gear reduction arrangement is a three-stage gear reduction arrangement with an overall reduction ratio of between 13-16. By properly selecting the number of stages of the multi-stage reduction gear structure and the reduction ratio thereof, the multi-stage reduction gear structure can keep compact and simultaneously can not be too complex, and the assembly and the manufacture are simplified. Meanwhile, the experimental research of the applicant shows that the three-stage gear reduction structure is optimal, so that the volume of the product obtained is minimum, and particularly, the size of the final product can be kept within 52mm x43mm x 23.5mm (length x width x height). Of course, it is also possible to design a multi-stage reduction gear structure into more stages, but this will result in an increase in the number of parts and an increase in the structural complexity to some extent.

It is further preferred that the three-stage gear reduction structure comprises a first pinion gear, a first duplicate gear structure, a second duplicate gear structure and a third duplicate gear structure arranged on the output shaft of the motor, each duplicate gear structure comprising a gearwheel and a pinion gear, wherein the gearwheel and the pinion gear in each duplicate gear structure are rigidly connected in a rotationally fixed manner, preferably constructed in one piece, wherein the first pinion gear meshes with the gearwheel in the first duplicate gear structure, the pinion gear of the first duplicate gear structure meshes with the gearwheel of the second duplicate gear structure, and the pinion gear of the second duplicate gear structure meshes with the gearwheel of the third duplicate gear structure. With this three-stage gear reduction structure, a thrust force of up to 50N can be provided on the lock lever.

Preferably, the rotary translation conversion mechanism comprises a male thread formed on one end of the locking lever and a corresponding female thread formed on an inner wall of a sleeve, wherein the sleeve is rigidly connected, in particular integrally formed, with the third double gear structure in a rotationally fixed manner.

Alternatively, it is also possible, for example, to design one end of the locking lever as a hollow cylinder, on the inner wall of which a female thread is provided, while the third double gear has a shaft end with a corresponding male thread. In fact, the rotary-translational conversion mechanism may be variously configured, and for example, it is also conceivable to design the rotary-translational conversion mechanism as a rack-and-pinion structure, a ball screw structure, or the like.

Preferably, the electronic locking device further comprises a microswitch and a position sensor, by means of which the position of the locking lever can be detected, in particular in any particular position between the locking position and the rest position. The position sensor is preferably designed as a resistive position sensor, the output signal of which can be supplied to a control module of the electronic locking device or to a higher-level control system, such as a charging control system of an electric vehicle.

Preferably, the electronic locking device further comprises an emergency unlocking mechanism which is mechanically coupled with the pinion of the third dual gear structure. Therefore, in an emergency or when the electric unlocking is impossible due to power failure, the user can manually unlock the electronic locking device through the emergency unlocking mechanism.

Preferably, the emergency unlocking mechanism includes a sector gear, a transmission shaft, a handle, and a fourth dual gear structure, wherein the sector gear and the handle are respectively fixed at both ends of the transmission shaft, the sector gear can be placed in mesh with a pinion of the fourth dual gear structure, and wherein a bull gear of the fourth dual gear structure can be in mesh with a pinion of the third dual gear structure. In the case of an electric unlocking failure, the user rotates the transmission shaft by means of the handle, so that the sector gear preferably rotates through 90 ° to engage with the pinion of the fourth dual gear structure, and manually rotates the third dual gear structure, so that the electronic locking device is unlocked. A force of preferably 80N can be provided by the emergency release mechanism to release the detent lever.

According to a further aspect of the present invention, the above object is also achieved by a charging system for an electric vehicle, wherein the charging system has a charging plug and a charging socket, wherein the charging system further comprises at least one electronic locking device according to one of the above embodiments.

Preferably, the electronic locking device is arranged on at least one of the charging plug and the charging socket.

Drawings

Further characteristics and advantages of the invention are given by the following description of a preferred embodiment, illustrated by means of the drawings.

The embodiments shown in the figures are only possible embodiments of the invention, and the features contained in the description, the claims and the drawings can also be combined with one another in different ways to give other different solutions. It should be understood that the invention is not limited to the particular embodiments described and illustrated. Rather, it is contemplated that the invention may be practiced with any combination of the following features and elements, whether or not they relate to different embodiments. Thus, the various features, embodiments and advantages are merely illustrative and are not considered elements or limitations of the claims.

The figures show:

fig. 1 is an exploded view showing an electronic locking device according to a preferred embodiment of the present invention;

FIG. 2 is a simplified schematic diagram of a transmission assembly of the electronic locking device shown in FIG. 1;

fig. 3 is a schematic view of an emergency unlocking mechanism of the electronic locking device according to a preferred embodiment of the present invention.

Detailed Description

Fig. 1 shows a preferred embodiment of the electronic locking device according to the invention in an exploded view. As shown in fig. 1, the electronic locking device includes a housing 1, and a motor 2, a transmission assembly, an emergency unlocking structure, and a locking lever 7 are disposed in the housing 1. A first pinion 3, which may be separate from the motor shaft or may be integrally formed, is provided on the output shaft of the motor 1. The first pinion 3 meshes with the gearwheel 41 of the first double gear structure 4, the pinion 42 of the first double gear structure 4 meshes with the gearwheel 51 of the second double gear structure 5, and the pinion 52 of the second double gear structure 5 meshes with the gearwheel 61 of the third double gear structure 6, whereby a three-stage gear reduction is achieved. Each double gear arrangement has a gearwheel and a pinion, which are preferably integrally formed but can also be arranged rigidly on the same shaft in a rotationally fixed manner. In this embodiment, the three-stage gear reduction comprises a first pinion 3, a first duplicate gear structure 4, a second duplicate gear structure 5 and a third duplicate gear structure 6, with a total reduction ratio preferably comprised between 13 and 16. The third double gear structure 6 is mechanically coupled to the blocking lever 7 by means of a translation-rotation conversion mechanism. The rotary translation conversion mechanism here comprises a male thread formed on one end of the locking lever 7 and a corresponding female thread formed on the inner wall of a sleeve 16, wherein the sleeve 16 is rigidly connected, in particular integrally formed, to the third dual gear arrangement 6 in a rotationally fixed manner. It is obvious that a person skilled in the art can configure the rotary-translation conversion mechanism in various ways, for example, it is also possible to configure one end of the locking rod 7 as a hollow cylindrical structure, on the inner wall of which a female thread is provided, while the third double gear structure 6 has a shaft end with a corresponding male thread; it is also conceivable to design the rotation-translation conversion mechanism as a rack-and-pinion structure, a ball screw structure, or the like. The motor 2 can drive the locking rod 7 to move between a locking position and a rest position through the transmission assembly and the rotation translation conversion mechanism, wherein in the locking position, the locking rod 7 of the electronic locking device extends out and locks a charging plug and a charging socket of a charging system together; in the rest position, the locking lever 7 is retracted, releasing the charging plug, so that the charging plug can be pulled out of the charging socket.

The electronic locking device also comprises an emergency unlocking mechanism so as to be manually unlocked by a user in case of emergency or power failure. As shown in fig. 1, the emergency unlocking mechanism includes a transmission shaft 8, and the transmission shaft 8 is extended from the inside of the housing through a through hole 10 formed in a cover plate 9 of the housing 1. A handle 11 is provided at the exposed end of the drive shaft 8, and a sector gear 12 is provided at the opposite end of the drive shaft 8. In case of an emergency operation, the sector gear 12 can mesh with the pinion 132 of the fourth double gear structure 13, the gearwheel 131 of the fourth double gear structure 13 meshing with the pinion 62 of the third double gear structure 6, thereby driving the locking lever 7 back to the rest position. Here, the emergency unlocking mechanism can provide a driving force of up to 80N to release the lock lever 7. The emergency unlocking mechanism shown in fig. 1 includes a two-stage reduction structure, but it is also conceivable to omit the fourth double gear structure 13, i.e., to reduce only one stage, i.e., the sector gear 12 directly meshes with the pinion 62 of the third double gear structure 6.

The electronic locking device further comprises a microswitch 15 and a position sensor 14 which jointly form a circuit. Here, the position sensor is preferably a resistive position sensor. The maximum travel of the locking lever 7 can be defined by the microswitch 15. The position sensor 14 is capable of detecting a specific position of the lock lever 7 between the lock position and the rest position. The output signal of the position sensor 14 can be supplied to a control module of the electronic locking device or a control system of a previous stage, such as a charging control system of an electric vehicle.

Fig. 2 schematically shows a three-stage deceleration structure in the electronic locking device according to the present invention. As shown in fig. 2, the end of the output shaft of the motor 2 carries a first pinion 3. The first pinion 3 drives the large gear 41 of the first double gear mechanism 4 to perform the first reduction. The first and second duplicate gear structures 4 and 5 are oppositely arranged so that the pinion gear 42 of the first duplicate gear structure 4 is meshed with the bull gear 51 of the second duplicate gear structure 5, and a second reduction is achieved. The gearwheel 61 of the third double gear structure 6 is driven by the pinion 52 of the second double gear structure 5, so that the third double gear structure 6 rotates together with the sleeve 16, which finally drives the locking lever 7 in a translational movement in the direction of its axis. The output shaft of the motor 2 shown in fig. 2 may be rotated clockwise or counterclockwise. When the output shaft of the motor 2 rotates in the counterclockwise direction, the respective members move in the direction opposite to the direction corresponding to the clockwise rotation of the output shaft, thereby enabling the lock lever 7 to be driven to extend or retract in the axial direction thereof.

Fig. 3 shows the emergency release mechanism of the electronic locking device in a schematic representation in isolation for the sake of clarity. The emergency release mechanism is designed here as a two-stage reduction mechanism, which comprises a drive shaft 8 extending through a cover plate 9 of the housing 1, which drive shaft 8 projects outwards from the housing 1 via a through-hole 9. A handle 11 and a sector gear 12 are respectively arranged at two ends of the transmission shaft 8. In the normal state, the sector gear 12 is not meshed with the pinion 132 of the fourth duplicate gear structure 13, and the lock lever 7 is completely driven by the motor 2. In case of emergency operation, the user grasps the handle 11 and rotates it through an angle, for example 90 °, so that the sector gear 12 is in mesh with the pinion 132. At this point, the user continues to rotate the handle 11, which drives the fourth dual gear structure 13 to rotate in the direction shown in the drawing, and further drives the third dual gear structure 6, eventually causing the locking rod 7 to retract to the rest position in the axial direction of the locking rod. Therefore, the electronic unlocking device is unlocked to release the charging gun. Here, the emergency unlocking mechanism can provide a driving force of up to 80N to release the lock lever 7. The emergency release mechanism shown in the drawings comprises a two-stage reduction arrangement, but it is also contemplated that only one or more reduction stages may be provided, i.e. the sector gear 12 directly meshes with the pinion 62 of the third dual gear arrangement 6 or a similar dual gear arrangement may be added.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

It is to be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the design of the present invention, but the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.