Electronic lock

Abstract

The utility model discloses an electronic lock which comprises a lock rod, a transmission device and a motor gear, the transmission device comprises a sleeve and a rotating disc fixedly connected to the end of the sleeve, transmission teeth are arranged on the rotating disc and meshed with the motor gear, internal threads are arranged on the inner wall of the sleeve, and the motor gear is arranged on the inner wall of the sleeve. The lock rod comprises a rod part and a cylindrical base part fixedly connected to the end part of the rod part, the base part is arranged in the sleeve of the transmission device, an external thread is arranged on the side surface of the base part, the external thread is meshed with the internal thread of the sleeve, the rod part is columnar, and the rod part is fixedly connected with the rod part. And the lock cylinder extends outwards from the inside of the sleeve to the outside of the electronic lock. Besides gear transmission, the transmission device also adopts thread transmission, so that the overall length of the electronic lock can be shortened, and the problem of rollback cannot be caused.

Description

Technical Field

[0001] This utility model relates to an electronic lock for a charging dock of an electric vehicle. More specifically, this utility model relates to an electronic lock with a shortened transmission chain, wherein the electronic lock has a reduced body size. Background Technology

[0002] The electronic lock is a crucial component of European standard AC charging docks. During vehicle charging, the electronic lock locks the charging gun head and signals to the vehicle that the charging gun is locked. Currently, most electronic locks on the market use a gear-driven mechanism for operation. This mechanism has a long transmission chain, occupies a significant amount of internal space, and lacks self-locking capability. Once the electronic lock lever is extended and locked, pressing it can easily push it back into the retracted state, failing to maintain the locked state. Furthermore, when the lever is extended and locked, existing motors generate a back electromotive force, which causes the transmission to reverse, resulting in an undesirable retraction of the lever. Utility Model Content

[0003] In order to overcome the above-mentioned or other defects in the prior art, this utility model proposes an electronic lock for electric vehicles. In addition to gear transmission, the transmission device of the electronic lock also adopts thread transmission, which shortens the transmission chain between the motor and the lock rod, thereby shortening the overall length of the electronic lock.

[0004] According to one aspect of the present invention, an electronic lock is provided, comprising a lock rod, a transmission device, and a motor gear, characterized in that the transmission device comprises a sleeve and a turntable fixedly connected to the end of the sleeve, the turntable having transmission teeth configured to mesh with the motor gear, the inner wall of the sleeve having an internal thread, the lock rod comprising a rod portion and a cylindrical base fixedly connected to the end of the rod portion, the base being disposed inside the sleeve of the transmission device, wherein an external thread is provided on the side surface of the base, the external thread meshing with the internal thread of the sleeve, the rod portion being cylindrical, extending outward from the inside of the sleeve to the outside of the electronic lock.

[0005] According to one embodiment, the turntable includes a truncated cone portion, and the drive teeth are disposed on the side surface of the truncated cone portion.

[0006] According to one embodiment, the electronic lock further includes an upper shell, wherein the upper shell is provided with a lock hole, the lock hole being positioned opposite the sleeve of the transmission device, the rod portion of the lock rod extending outward from the inside of the sleeve, passing through the lock hole and extending to the outside of the electronic lock, wherein a limiting flange is provided on the inner wall of the upper shell around the lock hole, the limiting flange extending into the inside of the sleeve, and the sleeve being rotatable around the limiting flange.

[0007] According to one embodiment, the electronic lock further includes a lower housing, wherein the turntable of the transmission device is rotatably disposed on the bottom wall of the lower housing.

[0008] According to one embodiment, a rotating shaft is provided on the bottom wall of the lower shell, the rotating shaft protruding toward the turntable of the transmission device, the turntable being sleeved on the rotating shaft and capable of rotating around the rotating shaft.

[0009] According to one embodiment, a recess is provided at the center of the bottom of the turntable of the transmission device for receiving the rotating shaft of the lower shell.

[0010] According to one embodiment, the recess of the turntable of the transmission device communicates with the sleeve, wherein the diameter of the recess is smaller than the inner diameter of the sleeve.

[0011] According to one embodiment, the cross-section of the rod is axisymmetric.

[0012] According to one embodiment, the cross-section of the rod is oblong.

[0013] According to one embodiment, the electronic lock further includes an unlocking device, which includes a rack disposed between the turntable of the transmission device and the first sidewall of the lower housing. The turntable is provided with unlocking teeth, and the teeth of the rack mesh with the unlocking teeth of the turntable.

[0014] According to one embodiment, the turntable of the transmission device further includes a disc-shaped portion disposed at the bottom of the truncated cone portion, and the unlocking teeth are disposed on the outer periphery of the disc-shaped portion.

[0015] According to one embodiment, the back side of the rack abuts against the first sidewall of the lower shell and is slidable on the first sidewall, thereby allowing the rack to slide along the first sidewall until one end of the rack reaches the second sidewall of the lower shell, wherein the second sidewall is adjacent to the first sidewall.

[0016] According to one embodiment, the unlocking device further includes a pull rod fixed to another end of the rack, the pull rod extending from the inside of the lower housing to the outside for pulling the rack to slide along the first sidewall of the lower housing.

[0017] According to one embodiment, a buffer pad is provided between one end of the rack and the second sidewall.

[0018] In the foregoing exemplary embodiments of the present invention, the advantages of the present invention are that, in addition to gear transmission, the transmission device also adopts threaded transmission, which shortens the transmission chain between the motor and the locking rod, thereby shortening the overall length of the electronic lock and saving space; the present invention uses a turntable transmission structure, which reduces transmission parts, simplifies the assembly process, and thus improves assembly efficiency; in addition, the reduction in the number of transmission parts reduces the number of molds required for production parts, saving production costs; furthermore, the transmission device of the present invention can improve the holding force, form a self-locking retention, and will not be affected by the electronic back electromotive force, thus preventing the problem of retraction.

[0019] Other objects and advantages of the present invention will become apparent from the following description of the invention with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the invention. Attached Figure Description

[0020] Figure 1 A perspective view of an electronic lock according to an exemplary embodiment of the present invention is shown, wherein the upper shell has been removed, revealing the internal structure of the electronic lock;

[0021] Figure 2 A cross-sectional view of an electronic lock in a locked state, according to an exemplary embodiment of the present invention, is shown, illustrating the interaction between the transmission mechanism and the locking lever;

[0022] Figure 3 A cross-sectional view of an electronic lock according to an exemplary embodiment of the present invention in the unlocked state is shown, illustrating the interaction between the transmission mechanism and the locking lever;

[0023] Figure 4 A perspective view of the locking lever of an electronic lock according to an exemplary embodiment of the present invention is shown;

[0024] Figure 5 A partial view of the unlocking device of an electronic lock according to an exemplary embodiment of the present invention is shown in the locked state, illustrating the interaction between the transmission mechanism and the rack; and

[0025] Figure 6A partial view of the unlocking device of an electronic lock according to an exemplary embodiment of the present invention is shown in the unlocked state, illustrating the interaction between the transmission mechanism and the rack. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. In this specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of this utility model with reference to the accompanying drawings is intended to explain the overall inventive concept of this utility model and should not be construed as a limitation thereof.

[0027] Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and apparatuses are illustrated to simplify the figures.

[0028] According to a general technical concept of this utility model, an electronic lock is provided, including a lock rod, a transmission device, and a motor gear. The transmission device includes a sleeve and a turntable fixedly connected to the end of the sleeve. The turntable has transmission teeth configured to mesh with the motor gear. The inner wall of the sleeve has an internal thread. The lock rod includes a rod portion and a cylindrical base fixedly connected to the end of the rod portion. The base is located inside the sleeve of the transmission device. An external thread is provided on the side surface of the base, meshing with the internal thread of the sleeve. The rod portion is cylindrical, extending outward from the inside of the sleeve to the outside of the electronic lock. The cross-section of the rod portion is non-circular.

[0029] In addition to gear transmission, the transmission device of the electronic lock according to this utility model also adopts thread transmission, which shortens the transmission chain between the motor and the locking rod, thereby shortening the overall length of the electronic lock and saving space. This utility model uses a turntable transmission structure, which reduces transmission parts, simplifies the assembly process, and thus improves assembly efficiency. In addition, the reduction in the number of transmission parts reduces the number of molds required for production parts, saving production costs. Furthermore, the transmission device of this utility model can improve the holding force and form a self-locking retention.

[0030] Figure 1 A perspective view of an electronic lock 100 according to an exemplary embodiment of the present invention is shown, wherein the upper shell 500 is removed, revealing the internal structure of the electronic lock 100. Figure 2A cross-sectional view of an electronic lock 100 according to an exemplary embodiment of the present invention in a locked state is shown, illustrating the interaction between the transmission device 300 and the locking lever 200. Figure 3 A cross-sectional view of an electronic lock 100 according to an exemplary embodiment of the present invention in the unlocked state is shown, illustrating the interaction between the transmission device 300 and the locking lever 200. Figure 4 A perspective view of the locking lever 200 of an electronic lock 100 according to an exemplary embodiment of the present invention is shown.

[0031] As shown in the figure, the electronic lock 100 according to this utility model includes a locking rod 200, a transmission device 300, and a motor gear 400. The transmission device 300 is characterized in that it includes a sleeve 310 and a turntable 320 fixedly connected to the end of the sleeve 310. The turntable 320 is provided with transmission teeth 321, which are configured to mesh with the motor gear 400. The inner wall of the sleeve 310 is provided with an internal thread 311. The locking rod 200 includes a rod portion 210 and a part fixedly connected to the end of the sleeve 310. The rod 210 has a cylindrical base 220 at its end, which is disposed inside the sleeve 310 of the transmission device 300. The base 220 has an external thread 221 on its side surface, which meshes with the internal thread 311 of the sleeve 310. The rod 210 is cylindrical and extends outward from the inside of the sleeve 310 to the outside of the electronic lock 100. The cross-section of the rod 210 is non-circular.

[0032] Normally, the shape of the lock hole 510 on the housing of the electronic lock 100 is set to be similar to the shape of the cross-section of the lock rod 200. When the lock rod 200 is set to a non-circular shape, the lock hole 510 on the housing of the electronic lock 100 will form a rotation limiter for the lock rod 200, so that the lock rod 200 cannot rotate around its axis. In this way, the lock rod 200 can only move along the lock hole 510 and cannot rotate around its axis.

[0033] like Figure 1-3 As shown, when the motor drives the gears on it to rotate, the turntable 320 of the transmission device 300 rotates around the axis under the action of the transmission gear 321. The sleeve 310 of the transmission device 300 and the thread inside the sleeve 310 also rotate with the turntable 320. Correspondingly, a twisting force is generated between the internal thread 311 inside the sleeve 310 and the external thread 221 on the side surface of the base 220 of the locking rod 200. On the other hand, since the lock hole 510 on the housing of the electronic lock 100 also has a rotational limiting function for the locking rod 200, under the combined action of these two forces, the locking rod 200 moves along the first extension and retraction.

[0034] According to the electronic lock of this utility model, the locking rod and the transmission device adopt a threaded transmission. The threaded structure can form a self-locking state when the locking rod is extended or retracted. The locking rod cannot be easily pressed back, the holding force is large, and it will not be affected by the electronic back electromotive force, thus avoiding the problem of retraction.

[0035] The turntable 320 includes a truncated cone portion 322, and the transmission gear 321 is disposed on the side surface of the truncated cone portion 322 to form a bevel gear. Furthermore, a bevel gear is also mounted on the drive shaft of the motor, and this bevel gear meshes with the transmission gear 321 on the side surface of the truncated cone portion 322 of the turntable 320, thereby driving the turntable 320 of the transmission device 300 to rotate around the shaft.

[0036] As those skilled in the art know, the drive teeth on a motor can take many forms. Correspondingly, the transmission teeth 321 of the transmission device 300 that mesh with it can also take many forms, and are not limited to those set on the turntable 320 and on the truncated cone portion 322 of the turntable 320 as described above. Furthermore, the turntable 320 of the transmission device 300 is not limited to the specific form of this embodiment, as long as it can make the sleeve 310 rotate around the axis.

[0037] As shown in the figure, the electronic lock 100 also includes an upper shell 500, wherein the upper shell 500 is provided with a lock hole 510, the lock hole 510 is positioned opposite to the sleeve 310 of the transmission device 300, the rod portion 210 of the locking rod 200 extends outward from the inside of the sleeve 310, passes through the lock hole 510 and extends to the outside of the electronic lock 100, wherein a limiting flange 520 is provided on the inner wall of the upper shell 500 around the lock hole 510, the limiting flange 520 extends into the inside of the sleeve 310, and the sleeve 310 of the transmission device 300 can rotate around the limiting flange 520.

[0038] When the electronic lock 100 is locked, the locking rod 200 extends outward to its maximum length, and the cylindrical base 220 of the locking rod 200 abuts against the limiting flange 520.

[0039] Here, the sleeve 310 of the transmission device 300 is a circular sleeve 310 so that it can rotate relative to the cylindrical base 220 of the locking rod 200.

[0040] The electronic lock 100 also includes a lower shell 600, wherein the turntable 320 of the transmission device 300 is rotatably mounted on the bottom wall of the lower shell 600.

[0041] As shown in the figure, a rotating shaft 610 is provided on the bottom wall of the lower shell 600. The rotating shaft 610 protrudes toward the turntable 320 of the transmission device 300. The turntable 320 is sleeved on the rotating shaft 610 and can rotate around the rotating shaft 610.

[0042] Here, the rotating shaft 610 serves to position the transmission device 300, fixing it at a specific position within the lower housing 600 to ensure that the transmission gear 321 of the transmission device 300 remains engaged with the gears of the motor. When the electronic lock 100 unlocks, the locking lever 200 retracts completely and abuts against the end of the rotating shaft 610, which acts as a stop for the locking lever 200.

[0043] Accordingly, a recess 323 is provided at the center of the bottom of the turntable 320 of the transmission device 300 for receiving the rotating shaft 610 of the lower housing 600. As shown in the figure, the recess 323 of the turntable 320 of the transmission device 300 is connected to the sleeve 310, wherein the diameter of the recess 323 is smaller than the inner diameter of the sleeve 310. This forms a shoulder between the recess 323 and the sleeve 310. Of course, the recess 323 and the sleeve 310 may not be connected. The recess 323 itself forms a blind hole.

[0044] Those skilled in the art will understand that the arrangement of the recess 323 of the transmission device 300 and the rotating shaft 610 of the lower housing 600 described above is merely exemplary and not limiting; many other forms are possible, as long as mutual rotation between the two can be achieved. For example, the rotating shaft can be located at the center of the bottom of the turntable 320 of the transmission device 300, and a recess can be located at a corresponding position in the lower housing 600. Furthermore, for example, a bearing can be provided between the rotating shaft 610 and the recess 323 to facilitate sliding between them.

[0045] Among them, such as Figure 4 As shown, the rod portion 210 of the locking rod 200 is made of conductive material, the base portion 220 is made of rubber, and the rod portion 210 is inserted into and molded into the base portion 220.

[0046] Specifically, the cross-section of the rod portion 210 can be designed to be axisymmetric. More specifically, the cross-section of the rod portion 210 can be designed to be elongated.

[0047] The shape of the cross-section of the rod portion 210 of the lock bar 200 described above is merely exemplary. Those skilled in the art will know that other cross-sectional shapes are also possible, such as squares or triangles, as long as they are not circular.

[0048] Figure 5A partial view of the unlocking device 700 of an electronic lock 100 according to an exemplary embodiment of the present invention is shown in a locked state, illustrating the interaction between the transmission device 300 and the rack 710; and Figure 6 A partial view of the unlocking device 700 of an electronic lock 100 according to an exemplary embodiment of the present invention is shown in the unlocked state, wherein the interaction between the transmission device 300 and the rack 710 is shown.

[0049] As shown in the figure, the electronic lock 100 according to this utility model also includes an unlocking device 700. The unlocking device 700 includes a rack 710, which is disposed between the turntable 320 of the transmission device 300 and the first side wall 601 of the lower shell 600. The turntable 320 is provided with unlocking teeth 324, and the teeth of the rack 710 mesh with the unlocking teeth 324 of the turntable 320.

[0050] Among them, such as Figure 1-3 As shown, the turntable 320 of the transmission device 300 also includes a disc-shaped portion 325, which is disposed at the bottom of the truncated cone portion 322, and the unlocking teeth 324 are disposed on the outer periphery of the disc-shaped portion 325.

[0051] The back side of the rack 710 abuts against the first sidewall 601 of the lower shell 600 and can slide on the first sidewall 601, so that the rack 710 can slide along the first sidewall 601 until one end of the rack 710 reaches the second sidewall 602 of the lower shell 600, wherein the second sidewall 602 is adjacent to the first sidewall 601.

[0052] The unlocking device 700 further includes a pull rod 720, which is fixedly connected to the other end of the rack 710. The pull rod 720 extends from the inside of the lower shell 600 to the outside and is used to pull the rack 710 to slide along the first side wall 601 of the lower shell 600.

[0053] Normally, the electronic lock 100 is powered by a motor, which transmits the power to the locking rod 200 via the transmission device 300, driving the locking rod 200 to lock and unlock. When the locking rod 200 is locked, if the motor malfunctions, an external force can be used to pull the lever 720 outside the electronic lock 100, causing the rack 710 to slide back along the first side wall 601. Due to the meshing between the teeth of the rack 710 and the unlocking teeth 324 on the turntable 320 of the transmission device 300, the turntable 320 of the transmission device 300 rotates, causing the locking rod 200 to retract, thereby unlocking the lock.

[0054] A buffer pad 620 is provided between one end of the rack 710 and the second sidewall 602. The buffer pad 620 can buffer the impact between the rack 710 and the second sidewall 602 of the lower shell 600, and also has a sound-dampening effect, reducing the noise generated by the impact.

[0055] According to this invention, the electronic lock employs internal and external thread transmission in its transmission device. The locking rod extends and retracts through the threaded transmission between the external thread on the base of the locking rod and the internal thread within the sleeve of the turntable of the transmission device. This shortens the transmission chain, thereby reducing the overall length of the electronic lock and saving space. Furthermore, the turntable transmission structure reduces the number of transmission parts, simplifies assembly processes, and improves assembly efficiency. The reduced number of transmission parts also reduces the number of molds required, saving costs. Additionally, the transmission device of this invention enhances the holding force, creating a self-locking mechanism. Specifically, the threaded structure creates a self-locking mechanism in both the extended and retracted states of the locking rod, preventing it from being easily pressed back. The strong holding force prevents it from being affected by the back electromotive force of the electrons, thus avoiding retraction issues.

[0056] Those skilled in the art will understand that the embodiments described above are exemplary and can be improved upon. The structures described in the various embodiments can be freely combined without causing any conflict in structure or principle.

[0057] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the present invention and should not be construed as a limitation thereof.

[0058] While some embodiments of the present general inventive concept have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the scope of which is defined by the claims and their equivalents.

[0059] It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude multiple elements. Furthermore, any reference numerals in the claims should not be construed as limiting the scope of this invention.

Claims

1. An electronic lock (100), comprising a lock bar (200), a transmission device (300), and a motor gear (400), characterized in that, The transmission device (300) includes a sleeve (310) and a turntable (320) fixedly connected to the end of the sleeve (310). The turntable (320) is provided with transmission teeth (321), which are configured to mesh with the motor gear (400). The inner wall of the sleeve (310) is provided with internal threads (311). The locking rod (200) includes a rod portion (210) and a cylinder fixedly connected to the end of the rod portion (210). The base (220) is disposed inside the sleeve (310) of the transmission device (300), wherein an external thread (221) is provided on the side surface of the base (220), the external thread (221) meshes with the internal thread (311) of the sleeve (310), and the rod (210) is columnar, extending outward from the inside of the sleeve (310) to the outside of the electronic lock (100).

2. The electronic lock (100) according to claim 1, characterized in that, The turntable (320) includes a truncated cone portion (322), and the transmission gear (321) is disposed on the side surface of the truncated cone portion (322).

3. The electronic lock (100) according to claim 2, characterized in that, The electronic lock (100) also includes an upper shell (500), wherein the upper shell (500) is provided with a lock hole (510), the lock hole (510) is positioned opposite to the sleeve (310) of the transmission device (300), the rod portion (210) of the lock rod (200) extends outward from the inside of the sleeve (310), passes through the lock hole (510) and extends to the outside of the electronic lock (100), wherein a limiting flange (520) is provided on the inner wall of the upper shell (500) around the lock hole (510), the limiting flange (520) extends into the inside of the sleeve (310), and the sleeve (310) is rotatable around the limiting flange (520).

4. The electronic lock (100) according to claim 2, characterized in that, The electronic lock (100) also includes a lower shell (600), wherein the turntable (320) of the transmission device (300) is rotatably mounted on the bottom wall of the lower shell (600).

5. The electronic lock (100) according to claim 4, characterized in that, A rotating shaft (610) is provided on the bottom wall of the lower shell (600). The rotating shaft (610) protrudes toward the turntable (320) of the transmission device (300). The turntable (320) is sleeved on the rotating shaft (610) and can rotate around the rotating shaft (610).

6. The electronic lock (100) according to claim 5, characterized in that, The bottom center of the turntable (320) of the transmission device (300) is provided with a recess (323) for receiving the rotating shaft (610) of the lower shell (600).

7. The electronic lock (100) according to claim 6, characterized in that, The recess (323) of the turntable (320) of the transmission device (300) is connected to the sleeve (310), wherein the diameter of the recess (323) is smaller than the inner diameter of the sleeve (310).

8. The electronic lock (100) according to claim 1, characterized in that, The cross-section of the rod (210) is axisymmetric.

9. The electronic lock (100) according to claim 8, characterized in that, The cross-section of the rod (210) is oblong.

10. The electronic lock (100) according to claim 4, characterized in that, The electronic lock (100) also includes an unlocking device (700), which includes a rack (710) disposed between the turntable (320) of the transmission device (300) and the first sidewall (601) of the lower shell (600). The turntable (320) is provided with unlocking teeth (324), and the teeth of the rack (710) mesh with the unlocking teeth (324) of the turntable (320).

11. The electronic lock (100) according to claim 10, characterized in that, The turntable (320) of the transmission device (300) further includes a disc-shaped portion (325), which is disposed at the bottom of the truncated cone portion (322), and the unlocking teeth (324) are disposed on the outer periphery of the disc-shaped portion (325).

12. The electronic lock (100) according to claim 10, characterized in that, The back side of the rack (710) abuts against the first sidewall (601) of the lower shell (600) and is able to slide on the first sidewall (601), thereby allowing the rack (710) to slide along the first sidewall (601) until one end of the rack (710) reaches the second sidewall (602) of the lower shell (600), wherein the second sidewall (602) is adjacent to the first sidewall (601).

13. The electronic lock (100) according to any one of claims 10 to 12, characterized in that, The unlocking device (700) also includes a pull rod (720) fixed to the other end of the rack (710), the pull rod (720) extending from the inside of the lower shell (600) to the outside, for pulling the rack (710) to slide along the first sidewall (601) of the lower shell (600).

14. The electronic lock (100) according to claim 12, characterized in that, A buffer pad (620) is provided between one end of the rack (710) and the second sidewall (602).

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