Transmission device for electronic lock, electronic lock and socket assembly

Abstract

The present disclosure describes a transmission device for an electronic lock, an electronic lock, and a socket assembly for a charging gun to insert for charging, the transmission device comprising: a driving wheel driven by a motor of the electronic lock; the transmission shaft is in transmission connection with the driving wheel; the driven wheel is sleeved on the transmission shaft and is in transmission connection with the transmission shaft; and a block body provided with a rack part engaged with the driven wheel. The transmission device further comprises a clutch mechanism, and the clutch mechanism comprises a pull rope; the sliding block is movably contained in the groove in the block body, is connected with the pull rope through a spring and is provided with a smooth top surface and a smooth slope surface; and the ball head part is arranged at the first end, adjacent to the driven wheel, of the transmission shaft. And by utilizing a clutch mechanism, the transmission shaft is configured to be axially and movably meshed with the driven wheel in a transmission manner.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a transmission device for an electronic lock, an electronic lock and a socket assembly, in particular a transmission device for an electronic lock, an electronic lock and a socket assembly aiming at disconnecting the transmission coupling when using a pull rope for emergency unlocking, for example in the technical field of new energy automobile charging equipment. BACKGROUND

[0002] Conventional fuel vehicles emit a large amount of pollutants, and thus the atmospheric pollution problem caused by fuel vehicles is prominent. In order to protect the environment and reduce atmospheric pollution, the automobile industry is currently committed to developing new energy vehicles, mainly electric vehicles, because electric vehicles directly use electric energy and do not emit any pollutants. In order to facilitate the charging of electric vehicles, at present, a charging seat for matching with a charging gun is arranged on the electric vehicle to charge the on-board battery; and correspondingly, the electric vehicle is generally charged by a charging pile with a charging plug or a charging gun. When charging, the charging plug is directly inserted into the charging socket on the electric vehicle, and the charging of the electric vehicle can be implemented.

[0003] For example, according to the requirements of the national standard, when charging the electric vehicle, in order to prevent the charging gun and the charging socket from being accidentally separated during charging to ensure the safety during charging, the charging plug must be reliably locked to the charging socket of the electric vehicle during the charging process and cannot be pulled out of the charging socket of the electric vehicle. In the prior art, an electronic lock is generally installed on the charging plug, and the electronic lock is a key component of the national standard alternating current charging seat, which locks the gun head during the charging process of the vehicle and feeds back a signal to the vehicle that the charging gun has been locked. The internal transmission structure of the electronic lock on the market is typically as follows: a motor gear as a main output power drives an intermediate transmission gear set, and finally drives a lock rod rack, a plurality of gears, for example, typically three sets of gears are engaged with each other to realize the working drive of the electronic lock.

[0004] And when the electronic lock fails to automatically drive the movable part to switch between the locked position and the unlocked position, for example, the movable part can be reset, for example, specifically reset to the locked position or the unlocked position, by pulling the pull rope, so as to realize emergency unlocking.

[0005] When emergency unlocking, since the gears in the transmission chain are engaged with each other, the reverse movement of the transmission gear and the gear driven by the rack after being pulled back by the pull rope will be inevitable, which leads to the fact that the design of the emergency unlocking force requires a high motor and it is difficult to reduce the force value to a very low value. This leads to the limitation of the application of the existing electronic lock.

[0006] In the prior art, there is an urgent need for an improved transmission device for an electronic lock, an electronic lock and a socket assembly, which, for example, by making the intermediate transmission gear set into a clutch gear structure, thereby when the rack is pulled back by the pull rope when emergency unlocking, the clutch gear is disengaged by the switch triggered by the sliding block, to disengage the transmission gear in the transmission path, thereby achieving the disconnection of the transmission connection when emergency unlocking by the pull rope in the field of new energy automobile charging equipment technology. In other words, when the lock rod rack is pulled, the movement of the driven gear will not reverse the movement of the motor gear, that is, the transmission connection with the motor is disconnected during the movement of the lock rod rack during emergency unlocking, so as to avoid the interference of the motor in actual use and the emergency unlocking force will not be limited by the motor, and the force value of emergency unlocking is minimized. Invention content

[0007] The purpose of the present disclosure is to provide an improved transmission device for an electronic lock, an electronic lock and a socket assembly which disconnects the gear transmission connection in the transmission path of the electronic lock when emergency unlocking by the pull rope, to solve at least one aspect of the above problems and defects existing in the prior art.

[0008] To achieve the above purpose, the present disclosure realizes the following technical solutions:

[0009] In a first aspect of the present disclosure, the present disclosure provides a transmission device for an electronic lock, the transmission device comprising: a driving wheel driven by a motor of the electronic lock; a transmission shaft in transmission connection with the driving wheel; a driven wheel sleeved on the transmission shaft and in transmission connection with the transmission shaft; and a block having a rack portion engaged with the driven wheel. The transmission device further comprises a clutch mechanism, the clutch mechanism comprising: a pull rope, a sliding block movably accommodated in a groove in the block and coupled with the pull rope via a spring, and having a smooth top surface and a slope surface; and a ball head portion provided at a first end of the transmission shaft adjacent to the driven wheel. And by using the clutch mechanism, the transmission shaft is configured to be axially movable and in transmission engagement with the driven wheel.

[0010] In an exemplary embodiment, under the interaction between the spring and the sliding block, the transmission shaft switches between a first state of transmission connection with the driven wheel and a second state of disengagement from the transmission connection with the driven wheel.

[0011] In an example embodiment, the transmission shaft is in the second state in response to the ball head being lifted along the ramp face to the top face as a result of linear movement of the slider within the groove toward the spring due to a pulling force applied to the slider by the pull cord, and the transmission shaft returns to the first state in response to the ball head being lowered along the ramp face until disengaged from the ramp face as a result of linear movement of the slider within the groove away from the spring due to a resilient return force applied to the slider by the spring.

[0012] In an example embodiment, the transmission shaft includes a shaft stem disposed between the driving wheel and the block, and a first shaft gear integrally fixed to the shaft stem adjacent to the driving wheel and a second shaft gear located at a middle portion.

[0013] In an example embodiment, the first shaft gear and the second shaft gear are two spur gears coaxially arranged and axially spaced apart from each other.

[0014] In an example embodiment, the driving wheel includes a first spur gear portion coaxially arranged and drivingly coupled with the first shaft gear at a second end of the transmission shaft opposite to the first end.

[0015] In an example embodiment, the transmission device further includes a substantially cylindrical shaft-on-cover sleeved on the transmission shaft, and the shaft-on-cover has a first axially protruding peripheral external gear on a first side axially toward the driving wheel, the first peripheral external gear fixedly engaged with the first spur gear portion.

[0016] In an example embodiment, the shaft-on-cover further has a centrally disposed recess on the first side axially toward the driving wheel for accommodating the first shaft gear, an inner wall of the recess defining a first peripheral internal gear, and the first shaft gear axially translationally engaged with the first peripheral internal gear such that the first spur gear portion is disengageably drivingly coupled with the first shaft gear via the shaft-on-cover.

[0017] In an example embodiment, the shaft-on-cover is flat on a second side axially opposite to the first side, and the shaft-on-cover further has a central through hole extending axially from the second side and communicating to the first peripheral internal gear, the central through hole configured to be passed through by the shaft stem of the transmission shaft.

[0018] In an exemplary embodiment, the teeth of the first circumferential external gear are straight teeth, and the tooth slots between adjacent teeth thereof are formed by recessing from the circumferential surface at the second side of the cylinder and configured to accommodate corresponding teeth of the first straight gear portion; and the top surfaces of all teeth of the first circumferential external gear are aligned with the circumferential surface of the cylinder.

[0019] In an exemplary embodiment, a counterbore is formed at the side where the first straight gear portion of the driving wheel is located, and a resilient member is accommodated in the counterbore, and the resilient member is adapted for the shaft rod to pass through and be sleeved on the shaft rod.

[0020] In an exemplary embodiment, the driven wheel is sleeved on the first end of the transmission shaft and in driving engagement with the second shaft gear.

[0021] In an exemplary embodiment, the driven wheel has an integral and coaxially arranged second straight gear portion and a cylindrical end, the second straight gear portion has a second circumferential external gear in driving engagement with the rack portion and a second circumferential internal gear axially translatable relative to the second shaft gear, respectively formed on the distal end side thereof axially toward the second shaft gear.

[0022] In an exemplary embodiment, each tooth of the second circumferential internal gear is a straight tooth tapered radially inward, and each tooth of the second shaft gear is tapered at one end toward the second circumferential internal gear.

[0023] In an exemplary embodiment, the ball head is at least a partial sphere made of plastic and fixed on the terminal end of the shaft rod at the first end of the transmission shaft.

[0024] In an exemplary embodiment, the pull rope is coupled to the sliding block via a connecting rod longitudinally movably extending through the block, and the spring is sleeved on the connecting rod and fixed at both ends to the block and the sliding block, respectively.

[0025] In a second aspect, the present disclosure provides an electronic lock, comprising: a housing; a transmission device according to the foregoing, accommodated in the housing; and the motor, fixed relative to the housing, and having an output shaft and an output gear sleeved on the output shaft, the driving wheel being driven by the motor via driving engagement with the output gear.

[0026] In an exemplary embodiment, the driving wheel further comprises a bevel gear portion, the bevel gear portion and the first straight gear portion are integrated and coaxially arranged, and the driving wheel is only in the driving engagement with the output gear via the output gear.

[0027] In an exemplary embodiment, the block is integrally coupled with a lock rod of the electronic lock.

[0028] In a third aspect, the present disclosure provides a socket assembly for a charging gun to be inserted into the socket assembly for charging, comprising: a charging socket; and an electronic lock according to the foregoing, mounted to the charging socket. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate certain aspects of the subject matter disclosed herein and, together with the description, help explain some of the principles associated with the disclosed embodiments. In the drawings,

[0030] Figure 1 Fig. 3 illustrates a schematic perspective view of an electronic lock according to an embodiment of the present disclosure, with the top cover of the housing displaced for clarity;

[0031] Figure 2 Fig. 4 illustrates a schematic perspective view of a transmission for the electronic lock according to an embodiment of the present disclosure;

[0032] Figure 3 Fig. 5 illustrates a schematic perspective view of a gear train in the transmission according to an embodiment of the present disclosure;

[0033] Figure 4 Fig. 6 illustrates a schematic perspective view of a transmission shaft in the transmission according to an embodiment of the present disclosure;

[0034] Figure 5a and Figure 5b Fig. 7a illustrates a schematic perspective view of a driving wheel in the transmission according to an embodiment of the present disclosure, from a different perspective;

[0035] Figure 6 Fig. 8 illustrates a schematic perspective view of an on-shaft cover in the transmission according to an embodiment of the present disclosure;

[0036] Figure 7a and Fig. 7b illustrates a schematic perspective view of a driven wheel in the transmission according to an embodiment of the present disclosure, from a different perspective;

[0037] Figure 8 Fig. 9 illustrates a cross-sectional view of the assembly relationship between the driving wheel, the on-shaft cover, the transmission shaft and the driven wheel;

[0038] Figure 9 Fig. 10 illustrates a schematic perspective view of the transmission according to an embodiment of the present disclosure;

[0039] Figures 10a to 10d Fig. 11 illustrates schematic perspective views of different working states of a clutch mechanism according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] The present disclosure will now be described in detail by way of reference only to the attached drawings, which are provided as illustrative examples so as to enable those skilled in the art to practice the present disclosure. It is to be noted that the following drawings and examples are not intended to limit the scope of the present disclosure to a single embodiment, but rather the other embodiments are possible by virtue of interchange of some or all of the described or illustrated elements. Moreover, where certain details are not described or are omitted, this is simply for the purpose of brevity and clarity and is not intended to be limiting. Unless otherwise specified, the embodiments described herein are not to be construed as limiting, but rather, are to be construed as including all equivalents. Furthermore, the description is not to be construed as limiting the present disclosure to the embodiments described herein. Rather, the description is intended to convey the scope of the present disclosure, which is measured by the claims. The description is presented solely for the purpose of enabling a person having ordinary skill in the art to make and use the disclosure, and not in limitation thereof. As will be apparent to one of ordinary skill in the art, embodiments described as being implemented in software include but are not limited to embodiments implemented in hardware, firmware, or a combination thereof, and vice versa as appropriate or desired for a particular application or implementation. Throughout this document, embodiments showing a single component should not be read as limiting; rather, the present disclosure is intended to encompass other embodiments including multiple identical components, and vice versa, unless otherwise explicitly stated. Furthermore, Applicant does not intend to dedicate any term of the specification or claims to a special meaning unless expressly so defined and identified as required under 35 U.S.C. § 112, sixth paragraph.

[0041] Unless otherwise specified, "bottom" and "top", "upper" and "lower", and the like, appearing in the content of the present disclosure are relative concepts. Also, "corresponding" or "corresponding" appearing in the content of the present disclosure means the corresponding relationship between the parts used in pairs and working in cooperation.

[0042] Figure 1 A schematic perspective view of an electronic lock 1 according to an embodiment of the present disclosure is illustrated, with the top cover of the housing 30 displaced for clarity. Figure 2 A schematic perspective view of a transmission 10 for an electronic lock 1 according to an embodiment of the present disclosure is illustrated.

[0043] According to one general inventive concept of the present disclosure, for example as Figure 1 and Figure 2As shown, there is provided a transmission 10 for an electronic lock 1, the transmission 10 comprising: a driving wheel 11 driven by a motor 20 of the electronic lock 1, for example in driving engagement with an output gear 22 fitted on an output shaft 21 of the motor 20; a transmission shaft 12 in driving connection with the driving wheel 11; a driven wheel 13 fitted on and in driving connection with the transmission shaft 12; and a block 14 provided with a rack portion 140 in engagement with the driven wheel 13, for example specifically in gear-rack engagement with each other. The transmission 10 further comprises a clutch mechanism 15 comprising: a pull cord 151; a slider 152 movably accommodated in a groove 141 in the block 14 and coupled with the pull cord 151 via a spring 153, and provided with a smooth top surface 1522 and a slope surface 1521; and a ball head 154 provided at a first end of the transmission shaft 12 adjacent to the driven wheel 13 and configured to be movable against one of the top surface 1522 and the slope surface 1521, or disengaged from the top surface 1522 and / or the slope surface 1521. And with the clutch mechanism 15, the transmission shaft 12 is configured to be in driving engagement with the driven wheel 13 axially movably. Thus the transmission shaft 12 and the driven wheel 13, in turn, the driving wheel 11 form a disengageable driving connection. As an example, the groove 141 is for example a straight groove 141 and provided with a flat bottom surface for the slider 152 to move against.

[0044] With this arrangement, thus, by pulling the pull cord 151 to draw the slider 152 of the clutch mechanism 15, the linear movement of the slider 152 in the groove 141 enables the ball head 154 at the end of the transmission shaft 12 to slide against the slope surface 1521 and then be lifted to the top surface 1522, so that the transmission shaft 12 can move axially and eventually disengage the driving connection, so that the motor 20 gear cannot be reversely driven. Thus, the toothed movement process of pulling the lock lever 40 to disengage the driving connection with the motor 20 is achieved when unlocking in emergency, so that the motor 20 is avoided to be interfered in actual use and the emergency unlocking force is not limited by the motor 20, and the force value of emergency unlocking is minimized.

[0045] And as an example, typically, in such a process, the pulling force of the pull rope 151 acts on the slider 152 through the pull rope 151 to push the slider 152 against the spring 153 against the block 14, while the ball head 154 is in contact with the slope surface 1521 of the slider 152 and is lifted slidingly relative to the slope surface 1521 until reaching the top surface 1522; and once the pull rope 151 is released, the elastic restoring force of the spring 153 acts on the slider 152 and pushes the slider 152 reversely to make the slider 152 perform a reset-tending movement, while the ball head 154 translates on the top surface 1522 and then descends along the slope surface 1521 until disengaging from the slope surface 1521.

[0046] Correspondingly, under the interaction between the spring 153 and the slider 152, the transmission shaft 12 switches between the first state of being in transmission engagement with the driven wheel 13 and the second state of being disengaged from the transmission engagement with the driven wheel 13.

[0047] In a more specific embodiment, as an example, in response to the case that the ball head 154 is lifted along the slope surface 1521 to the top surface 1522 due to the linear motion of the slider 152 in the groove 141 towards the spring 153 caused by the pulling force of the pull rope 151 applied to the slider 152, the transmission shaft 12 is in the second state; and in response to the case that the ball head 154 descends along the slope surface 1521 until disengaging from the slope surface 1521 due to the linear motion of the slider 152 in the groove 141 away from the spring 153 caused by the elastic restoring force applied to the slider 152 due to the reset of the spring 153, the transmission shaft 12 returns to the first state.

[0048] In a specific exemplary embodiment, as an example, the ball head 154 is at least a partial sphere made of plastic, and is fixed on the end of the first end of the transmission shaft 12, due to such a configuration and considering the friction coefficient of the plastic material, thereby facilitating reliable sliding contact and elastic pressing with the slope surface 1521 and the top surface 1522 of the slider 152 without causing unnecessary wear.

[0049] And, as an example, the pull rope 151 is coupled to the slider 152 via a connecting rod 142 that extends longitudinally movably through the block 14, and the spring 153 is sleeved on the connecting rod 142 and fixed at both ends to the block 14 and the slider 152, respectively.

[0050] Figure 3 A schematic perspective view of a gear train in the transmission device 10 according to an embodiment of the present disclosure is shown.

[0051] According to exemplary embodiments of the present disclosure, as shown in Figure 3 In the transmission 10, along a transmission path, the motor 20 output gear 22, the driving wheel 11, the transmission shaft 12, the driven wheel 13, and the block 14 constitute a gear transmission system.

[0052] Figure 4 FIG. 6 illustrates a schematic perspective view of the transmission shaft 12 in the transmission 10 according to embodiments of the present disclosure.

[0053] According to exemplary embodiments of the present disclosure, as shown in Figure 4 The transmission shaft 12 includes a shaft stem 120 disposed between the driving wheel 11 and the block 14, and a first shaft gear 121 integrally fixed to the shaft stem 120 adjacent to the driving wheel 11 and a second shaft gear 122 located at a middle portion.

[0054] In further embodiments, as shown, the first shaft gear 121 and the second shaft gear 122 are two spur gears coaxially disposed and axially spaced apart from each other.

[0055] Figure 5a and Figure 5b FIG. 5 illustrates schematic perspective views of the driving wheel 11 in the transmission 10 according to embodiments of the present disclosure from different viewing angles.

[0056] According to exemplary embodiments of the present disclosure, as shown in Figure 5a and Figure 5b The driving wheel 11 includes, for example, a first spur gear portion 111 in transmission engagement with the output gear 22 of the motor 20 via a bevel gear portion 112 integrally and coaxially disposed therewith, the first spur gear portion 111 coaxially arranged and in transmission coupling with the first shaft gear 121 at a second end of the transmission shaft 12 opposite the first end.

[0057] In typical embodiments of the present disclosure, as shown, the driving wheel 11 is indirectly in transmission coupling with the first shaft gear 121 of the transmission shaft 12, and the first shaft gear 121 is axially movable relative to the driving wheel 11 and is disengageable from the transmission coupling with the driving wheel 11.

[0058] Figure 6 FIG. 4 illustrates a schematic perspective view of the on-shaft cover 16 in the transmission 10 according to embodiments of the present disclosure.

[0059] In specific embodiments, for example as Figure 6As shown, the transmission 10 further comprises a substantially cylindrical shaft cover 16 fitted over the transmission shaft 12, and the shaft cover 16 has a first axially protruding circumferential outer gear 161 on a first side axially facing the driving wheel 11, which first circumferential outer gear 161 is fixedly engaged with the first spur gear portion 111. This achieves a firm engagement and interlocking between the shaft cover 16 and the first spur gear portion 111 of the driving wheel 11 via the first circumferential outer gear 161.

[0060] In a further embodiment, for example as shown, the shaft cover 16 further has a centrally disposed recess on the first side axially facing the driving wheel 11 for accommodating the first shaft gear 121, the inner wall of the recess defining a first circumferential inner gear 162, and the first shaft gear 121 is axially translatable to engage the first circumferential inner gear 162, such that the first spur gear portion 111 is in a disengageable driving coupling with the first shaft gear 121 via the shaft cover 16.

[0061] In a further embodiment, for example as shown, the shaft cover 16 is flat on a second side axially opposite to the first side, and the shaft cover 16 further has a central through hole 163 extending axially from the second side to communicate with the first circumferential inner gear 162, the central through hole 163 being configured to be passed through by the shaft stem 120 of the transmission shaft 12.

[0062] Thus, the recess is adapted to accommodate the transmission shaft 12 to be axially translatable relative to the driving wheel 11 and to allow the first shaft gear 121 of the transmission shaft 12 to be translated into and out of the recess for driving engagement and disengagement with the first circumferential inner gear 162, respectively. With this arrangement, the shaft cover 16 is facilitated to be in a disengageable driving coupling with the first shaft gear 121 of the transmission shaft 12 by means of the first circumferential inner gear 162 defined by the inner wall of the recess.

[0063] In a further embodiment, for example as shown, the teeth of the first circumferential outer gear 161 are straight teeth, and the tooth spaces between adjacent teeth thereof are formed by recessing from the circumferential surface at the second side of the cylinder and configured to accommodate corresponding teeth of the first spur gear portion 111; and the top surfaces 1522 of all the teeth of the first circumferential outer gear 161 are aligned with the circumferential surface of the cylinder. This specific configuration of the first circumferential outer gear 161 is simple and easy to shape, and facilitates a tight engagement with the first spur gear portion 111.

[0064] And, in still further embodiments according to the present disclosure, as shown by way of example, a counter bore 113 is formed at a side of the first spur gear portion 111 of the driving wheel 11, and a resilient member 164 is housed in the counter bore 113 and is adapted to be passed through and fitted on the shaft rod 120. The resilient member 164 is typically a compression spring, for example, to facilitate a progressive increase in resistance to over-insertion of the shaft rod 120, with a greater resilient return force provided for a deeper insertion beyond the design intended insertion, to avoid unintended axial movement of the shaft rod 120. And, once the pull cord 151 is released, the resilient member 164 provides a resilient return force acting on the second end of the shaft rod 120 to drive the transmission shaft 12 back to the position where the ball head 154 at the first end of the transmission shaft 12 also tends to slide along the top surface 1522 of the slider 152 and slide from the top surface 1522 to the slope surface 1521 and then slide down along the slope surface 1521 by friction. At the same time, the spring 153 housed in the groove 141 of the block 14 also exerts a resilient return force on the slider 152 to push the slider 152 to translate away from the spring 153, thereby generating a tendency of the slider 152, especially the slope surface 1521 thereof, to move in the opposite direction of the ball head 154 and gradually disengage from each other, until the two eventually disengage so that the clutch mechanism 15 no longer acts, while facilitating the full transmission path of the electronic lock 1 to be re-established.

[0065] Figure 7a FIG. 7b illustrates a schematic perspective view of the driven wheel 13 in the transmission device 10 according to an embodiment of the present disclosure from a different perspective.

[0066] In exemplary embodiments of the present disclosure, as shown by way of example in Figure 7a As shown by way of example in FIG. 7b, the driven wheel 13 is fitted on the first end of the transmission shaft 12 and in transmission engagement with the second shaft gear 122.

[0067] In specific embodiments, as shown by way of example, the driven wheel 13 has an integral and coaxial second spur gear portion 130 and a cylindrical end 133, the second spur gear portion 130 has a second circumferential outer gear 131 in transmission engagement with the rack portion 140 and a second circumferential inner gear 132 axially translatable relative to the second shaft gear 122 formed at a distal end thereof axially towards the second shaft gear 122, wherein the second circumferential outer gear 131 is circumferentially arranged and extends radially outwardly, as shown by way of example.

[0068] In a further specific embodiment, for example, as shown in the figure, each tooth of the second circumferential internal gear 132 is a spur tooth that tapers radially inward, and each tooth of the second shaft gear 122 tapers at one end toward the second circumferential internal gear 132. Through this configuration, each spur tooth surface of the second circumferential internal gear 132, which corresponds to the second spur gear portion 130 of the driven wheel 13, forms an outwardly expanding guide surface, thereby facilitating the guidance of the second circumferential internal gear 132 of the second spur gear portion 130 for the insertion movement of the second shaft gear 122 of the transmission shaft 12, thereby ensuring accurate insertion and accurately achieving the transmission connection between the second shaft gear 122 of the transmission shaft 12 and the second circumferential internal gear 132 of the second spur gear portion 130 of the driven wheel 13. Moreover, since the transmission shaft 12 is axially movable, the transmission connection between the second shaft gear 122 and the second circumferential internal gear 132 of the second spur gear portion 130 of the driven wheel 13 is disengageable.

[0069] Figure 8 FIG2 is a cross-sectional view showing the assembly relationship among the driving wheel 11 , the shaft cover 16 , the transmission shaft 12 and the driven wheel 13 .

[0070] Figure 9 FIG. 1 is a schematic perspective view of the transmission device 10 according to an embodiment of the present disclosure.

[0071] With the above settings, typically Figure 8 As shown, the output gear 22 of the motor 20 and the bevel gear portion 112 of the driving wheel 11 typically form an intersecting axis bevel gear transmission pair. The first spur gear portion 111 of the driving wheel 11 and the first circumferential outer gear 161 of the shaft cover 16 are firmly matched and fixed relative to each other, and the first circumferential inner gear 162 of the shaft cover 16 and the first shaft gear 121 at the second end of the transmission shaft 12 form an internal gear transmission pair. The second shaft gear 122 at the middle of the transmission shaft 12 forms a gear-rack transmission pair with the rack portion 140 of the block 14. In addition, the elastic member 164 disposed in the recessed portion of the shaft cover 16 can apply an elastic force to the first shaft gear 121 pressing against the elastic member 164. This constitutes the transmission path of the transmission system of the transmission device 10.

[0072] And, typically Figure 9As shown, the ball head 154 provided on the end of the first end of the transmission shaft 12 is in frictional sliding contact with one of the top surface 1522 and the slope surface 1521 of the slider 152. The pull rope 151 is capable of exerting a traction force on the slider 152. In addition, the spring 153 provided in the recess 141 of the block 14 is capable of exerting an elastic force on the slider 152 pressing against the spring 153, thereby constituting a transmission path of the clutch mechanism 15 of the transmission device 10.

[0073] Figures 10a to 10d Fig. 4 shows schematic perspective views of different working states of the clutch mechanism 15 according to embodiments of the present disclosure.

[0074] According to embodiments of the present disclosure, the clutch mechanism 15 of the transmission device 10 continuously switches between different working states in a whole working cycle, for example as shown in Figures 10a to 10d

[0075] As an example, as shown, during the emergency unlocking process, the switch triggering the disengagement of the clutch gear is triggered by the emergency unlocking slider 152, so that the driven gear will not reverse the movement of the motor gear when the rack of the lock lever 40 is pulled.

[0076] In specific embodiments, for example as shown, first, in response to the condition of emergency unlocking being met, the pull rope 151 is pulled, as shown, to exert a traction force on the slider 152 to make the slider 152 translate along its longitudinal direction and compress the spring 153, while the slope surface 1521 of the slider 152 abuts and pushes the ball head 154 to make the ball head 154 be gradually lifted along the slope surface 1521 in an abutting friction state, and the lifting of the ball head drives the axial movement of the transmission shaft 12 along the vertical direction as shown, so that the second shaft gear 122 of the transmission shaft 12 tends to axially displace relative to the second circumferential internal gear 132 of the second spur gear part 130 of the driven wheel 13 and tends to disengage the transmission coupling therebetween. This step essentially serves as the initial stage of emergency unlocking.

[0077] ​Then, the pull rope 151 is continuously pulled until the slider 152 drives the rack 140 to move to the unlocking state. During this movement, the slope surface 1521 of the slider 152 continuously contacts and presses the ball head 154, and for the second circumferential external gear 131 in contact with the rack 140, the second circumferential internal gear 132 is disengaged from the transmission shaft 12, specifically disengaged from the second shaft gear 122 of the transmission shaft 12, and thus the driven wheel 13 is continuously disengaged from the output shaft 21 of the motor 20. At the same time, the recess of the shaft cover 16 accommodates the axial upward insertion of the transmission shaft 12, and the elastic member 164 in it is pressed and has a tendency to elastically recover. This step is essentially the step of continuously triggering the disengagement of the clutch mechanism 15.

[0078] Subsequently, the unlocking movement ends, the pull rope 151 is released, i.e. stops applying traction to the slider 152, and the slider 152 is reset under the action of the compressed spring 153, and the ball head 154 moves from the top surface 1522 to the slope surface 1521 along with the longitudinal reset movement of the slider 152. At this time, the compressed elastic member 164 in the recess of the shaft cover 16 also applies an elastic recovery force to the transmission shaft 12 to drive the transmission shaft 12 to move axially downward and reset, and then push the ball head 154 to descend along the slope surface 1521 from the highest point of the slope surface 1521. And in this process, as the slider 152 moves away from the reset spring 153 and the ball head 154 is pushed by the transmission shaft 12 to press against the slope surface 1521 and descend, the ball head 154 gradually reduces contact with the slope surface 1521 of the slider 152 until it is bent and disengaged, and at this time, the clutch mechanism 15 is reset to reestablish the transmission engagement of the transmission system, i.e. the complete transmission path is restored. This step is essentially the step of re-engaging and triggering the disengagement of the clutch mechanism 15.

[0079] Finally, via the complete transmission path, the motor 20 drives the execution of the locking movement, and the output gear 22 sleeved on the output shaft 21 of the motor 20 drives the rack 140 to move to the locking state via the transmission coupling of the transmission system. This step is essentially the step of continuously engaging the transmission system until normal locking.

[0080] Based on the above-mentioned setting, the improved transmission device 10 for electronic lock 1 suitable for electric vehicle charging field can achieve the following superior technical effects superior to the prior art in the field: by making the intermediate transmission gear set into a clutch gear structure, when the rack is pulled back by the pull rope 151 during emergency unlocking, the clutch gear is disengaged by the switch triggered by the sliding block 152, so that the transmission gear in the transmission path is disengaged, thereby realizing the disconnection of the transmission connection when the pull rope 151 is used for emergency unlocking in the new energy vehicle charging equipment technical field. In other words, when the rack of the lock rod 40 is pulled, the movement of the driven gear will not reverse the movement of the motor 20 gear, that is, the transmission connection with the motor 20 is disconnected during the movement of the rack of the lock rod 40 during emergency unlocking. Therefore, in actual use, the interference of the motor 20 is avoided, and the emergency unlocking force is not limited by the motor 20, thereby greatly reducing the force value of emergency unlocking.

[0081] According to another aspect of the present disclosure, as shown in the drawings, the present disclosure also provides an electronic lock 1, comprising: a housing 30; a transmission device 10 according to the foregoing, accommodated in the housing 30; and the motor 20 fixed relative to the housing 30, and provided with an output shaft 21 and an output gear 22 sleeved on the output shaft 21, the driving wheel 11 is driven by the motor 20 via the transmission engagement with the output gear 22.

[0082] In an exemplary embodiment of the present disclosure, for example, as shown in the drawings, the driving wheel 11 further comprises a bevel gear part 112, which is integrated and coaxially arranged with the first straight gear part 111, and the driving wheel 11 is only in the transmission engagement with the output gear 22 via the output gear 22.

[0083] In another exemplary embodiment of the present disclosure, for example, as shown in the drawings, the block body 14 is integrally coupled with the lock rod 40 of the electronic lock 1.

[0084] Moreover, considering that the electronic lock 1 provided by another aspect of the present disclosure comprises the foregoing transmission device 10, it also has the advantages of the foregoing transmission device 10 for electronic lock 1, which will not be repeated here.

[0085] According to still another aspect of the present disclosure, as shown in the drawings, the present disclosure also provides a socket assembly for charging gun insertion, comprising: a charging socket; and an electronic lock 1 according to the foregoing, mounted to the charging socket.

[0086] Moreover, considering that the socket assembly provided by another aspect of the present disclosure comprises the foregoing transmission device 10 for electronic lock 1 and the foregoing electronic lock 1, it also has the advantages of the foregoing transmission device 10 and the foregoing electronic lock 1, which will not be repeated here.

[0087] The transmission for an electronic lock, the electronic lock, and the socket assembly for the charging gun to be inserted into the socket for charging in the foregoing embodiments of the present disclosure can be used to charge an electric vehicle or other electric equipment. The above description is intended to be illustrative and not restrictive. Although the present disclosure is illustrated with reference to the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplarily illustrate the preferred embodiments of the present disclosure and should not be construed as a limitation of the present disclosure.

[0088] Therefore, those skilled in the art will appreciate that the above-described embodiments are exemplary only, and that modifications can be made by those skilled in the art to the above-described embodiments without departing from the scope of the present disclosure, and the structures described in various embodiments can be modified and freely combined without structural or principle conflicts, and such changes should fall within the scope of the present disclosure.

[0089] The scope and breadth of the present disclosure should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.

[0090] It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. Additionally, any reference signs in the claims should not be construed as limiting the scope of the present disclosure.

Claims

1. A transmission (10) for an electronic lock (1), the transmission comprising: a driving wheel (11) driven by a motor (20) of the electronic lock; a transmission shaft (12) in driving connection with the driving wheel; a driven wheel (13) fitted on the transmission shaft and in driving connection with the transmission shaft; and a block (14) having a rack portion (140) engaged with the driven wheel, characterized in that the transmission further comprises a clutch mechanism (15) comprising: a pull cord (151); a slider (152) movably housed in a groove (141) in the block and coupled with the pull cord via a spring (153), and having a flat top surface (1522) and a slope surface (1521); and a ball head portion (154) provided at a first end of the transmission shaft adjacent to the driven wheel, and with the clutch mechanism, the transmission shaft is configured to be axially movably in driving engagement with the driven wheel.

2. The transmission (10) according to claim 1, characterized in that The transmission shaft (12) is switched between a first state in driving connection with the driven wheel (13) and a second state disengaged from the driven wheel (13) under interaction between the spring (153) and the slider (152).

3. The transmission (10) according to claim 2, characterized in that in response to the slider (152) being lifted along the slope surface (1521) to the top surface (1522) due to linear motion of the slider (152) in the groove (141) toward the spring (153) caused by a pulling force applied to the slider (152) by the pull cord (151), the transmission shaft (12) is in the second state; and in response to the slider (152) being lowered along the slope surface (1521) until disengaged from the slope surface (1521) due to linear motion of the slider (152) in the groove (141) away from the spring (153) caused by an elastic restoring force applied to the slider (152) by the spring (153) in response to reset of the spring (153), the transmission shaft (12) is restored to the first state. The transmission shaft (12) comprises a shaft stem (120) provided between the driving wheel (11) and the block (14), and a first shaft gear (121) adjacent to the driving wheel (11) and a second shaft gear (122) located at a middle portion integrally fixed on the shaft stem (120).

4. The transmission (10) of claim 1, characterized in that The first shaft gear (121) and the second shaft gear (122) are two spur gears coaxially arranged and axially spaced apart from each other.

5. The transmission (10) of claim 4, characterized in that The driving wheel (11) comprises a first spur gear portion (111) coaxially arranged and in driving connection with the first shaft gear (121) at a second end of the transmission shaft (12) opposite to the first end.

6. The transmission (10) of claim 5, characterized by ​ 7. The transmission (10) of claim 6, characterized by The transmission device (10) further comprises a substantially cylindrical shaft-on-cover (16) which is sleeved on the transmission shaft (12), and the shaft-on-cover (16) is provided with a first circumferential outer gear (161) protruding axially on a first side axially facing the driving wheel (11), and the first circumferential outer gear (161) is fixedly engaged with the first spur gear portion (111).

8. The transmission (10) of claim 7, characterized by The shaft-on-cover (16) is further provided with a centrally arranged recess for accommodating the first shaft gear (121) on the first side axially facing the driving wheel (11), and the inner wall of the recess defines a first circumferential inner gear (162), and the first shaft gear (121) is axially translationally engaged with the first circumferential inner gear (162), so that the first spur gear portion (111) is in disengageable driving connection with the first shaft gear (121) via the shaft-on-cover (16).

9. The transmission (10) of claim 8, characterized in that The shaft-on-cover (16) is flat on a second side axially opposite to the first side, and the shaft-on-cover (16) is further provided with a central through hole (163) extending axially from the second side and communicating with the first circumferential inner gear (162), and the central through hole (163) is configured to be adapted for the shaft rod (120) of the transmission shaft (12) to pass through.

10. The transmission (10) of claim 9, characterized in that The teeth of the first circumferential outer gear (161) are straight teeth, and the tooth gaps between adjacent teeth thereof are formed by being recessed from the circumferential surface at the second side of the cylinder, and are configured to accommodate corresponding teeth of the first spur gear portion (111); and The top surfaces (1522) of all the teeth of the first circumferential outer gear (161) are aligned with the circumferential surface of the cylinder.

11. The transmission (10) of claim 9, characterized in that The first spur gear portion (111) of the driving wheel is formed with a counterbore (113) at a side thereof, and a resilient member (164) is accommodated in the counterbore, and the resilient member (164) is adapted for the shaft rod (120) to pass through and be sleeved thereon.

12. Transmission (10) according to any one of claims 6 to 11, characterized in that The driven wheel (13) is sleeved on the first end of the transmission shaft (12) and in driving engagement with the second shaft gear (122).

13. The transmission (10) of claim 12, characterized by The driven wheel (13) is provided with an integral and coaxial second spur gear portion (130) and a cylindrical end (133), and the second spur gear portion (130) is formed with a second circumferential outer gear (131) in driving engagement with the rack portion (140) and a second circumferential inner gear (132) axially translationally engaged with the second shaft gear (122) respectively on a distal end side thereof axially facing the second shaft gear (122).

14. The transmission (10) of claim 13, characterized by Each tooth of the second circumferential inner gear (132) is a radially inwardly tapered straight tooth, and each tooth of the second shaft gear (122) is tapered at an end thereof facing the second circumferential inner gear (132).

15. The transmission (10) of claim 4, characterized by The ball head portion (154) is an at least partially spherical ball made of plastic and fixed on a terminal end of the shaft rod (120) at the first end of the transmission shaft (12).

16. The transmission (10) of claim 1, characterized by The pull rope (151) is coupled to the sliding block (152) via a connecting rod (142) which extends through the block (14) longitudinally movably, and the spring (153) is sleeved on the connecting rod (142) and fixed at both ends to the block (14) and the sliding block (152) respectively.

17. An electronic lock (1) characterized by The electronic lock (1) comprises: A housing (30): The transmission device (10) according to any one of claims 1 to 16 is accommodated in the housing (30); and The motor (20) is fixed relative to the housing (30) and is provided with an output shaft (21) and an output gear (22) sleeved on the output shaft (21), and the driving wheel (11) is driven by the motor (20) via transmission engagement with the output gear (22).

18. The electronic lock (1) according to claim 17, characterized in that The driving wheel (11) further comprises a bevel gear part (112) which is integrated with the first spur gear part (111) and coaxially arranged, and the driving wheel (11) is in the transmission engagement with the output gear (22) only via the output gear (22).

19. The electronic lock (1) according to claim 17, characterized in that The block (14) is integrally coupled with a lock rod (40) of the electronic lock (1).

20. A socket assembly for a charging gun to be inserted into for charging, comprising: A charging socket; And The electronic lock (1) according to any one of claims 17 to 19 is mounted to the charging socket.

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