Retractable power transmission devices and electronic locks for vehicle charging sockets
The reverse-retraction transmission device addresses the issue of unintended locking rod retraction in vehicle charging sockets by incorporating an engagement gap to buffer the motor output gear's reverse rotation, maintaining stable locking.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- TYCO ELECTRONICS TECHNOLOGY (SIP) CO LTD
- Filing Date
- 2025-10-17
- Publication Date
- 2026-05-08
AI Technical Summary
Current electronic locks for vehicle charging sockets experience reverse rotation of the motor output gear during power-off, leading to unintended retraction of the locking rod.
A reverse-retraction transmission device with an engagement gap or backlash between the motor output gear and the motor engaging gear to buffer the slight reverse rotation, preventing the locking rod from retracting.
Prevents the locking rod from being pulled back during power cut-off by buffering the reverse rotation of the motor output gear, ensuring stable locking operation.
Smart Images
Figure 2026075611000001_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a reverse-retraction transmission device for a motor output gear and an electronic lock for a vehicle charging socket.
Background Art
[0002] An electronic lock is an important component of an AC charging socket for an electric vehicle. The electronic lock locks the charging gun while the charging gun is inserted for vehicle charging and provides feedback to the vehicle that the charging gun is locked. The internal transmission structure of currently commercially available electronic locks consists of a motor output gear that transmits power to an intermediate transmission gear set and drives the intermediate transmission gear set. The intermediate transmission gear set transmits the power of the motor to a locking rod rack, and as a result, the locking rod rack can perform a locking operation or an unlocking operation. These three gear sets mesh with each other and drive to operate the electronic lock. However, in the current electronic lock, when extending or retracting the locking rod, the motor output gear rotates slightly in the reverse direction at the moment of power-off. This slight reverse rotation of the motor output gear drives the related gears to rotate in the reverse direction and retracts the locking rod.
Summary of the Invention
Problems to be Solved by the Invention
[0003] To overcome at least one of the above-mentioned defects or other defects of the prior art, the present disclosure proposes a reverse-retraction transmission device connected between a motor output gear and a transmission gear. There is an engagement gap or backlash between the teeth of the motor output gear and the teeth of the reverse-retraction transmission device that engage with each other to buffer the slight reverse rotation of the motor output gear, thereby overcoming the problem of retraction of the locking rod of the electronic lock.
Means for Solving the Problems
[0004] According to one embodiment of one aspect of the present disclosure, an anti-retracting type transmission device for a motor output gear is provided, comprising a body and a support frame. The body comprises a motor engaging gear, which is configured to mesh with the motor output gear to transmit power from the motor output gear, and after the teeth of the motor engaging gear mesh with the teeth of the motor output gear, a buffer space is provided between the teeth of the motor engaging gear and the teeth of the motor output gear for a preset stroke.
[0005] In one embodiment, the pre-set stroke of the buffer space is greater than or equal to the reverse rotation stroke of the motor output gear.
[0006] In one embodiment, the motor engaging gear has internal teeth, the motor output gear has external teeth, the motor engaging gear is fitted onto the outer circumference of the motor output gear, and the shape of the grooves between the internal teeth of the motor engaging gear is similar to the shape of the external teeth of the motor output gear.
[0007] In one embodiment, in a cross-section perpendicular to the rotation axis of the motor output gear, the external teeth of the motor output gear are each L-shaped, the grooves between the internal teeth of the motor engaging gear are also L-shaped, and the width of the grooves of the motor engaging gear is greater than the width of the external teeth of the motor output gear.
[0008] In one embodiment, the difference between the width of the groove of the motor engagement gear and the width of the external teeth of the motor output gear is equal to a preset stroke.
[0009] In one embodiment, the depth of the groove of the motor engagement gear is greater than the height of the external teeth of the motor output gear.
[0010] In one embodiment, the main body further comprises a transmission output gear, which is used to transmit power from the motor output gear.
[0011] In one embodiment, the transmission output gear is a bevel gear.
[0012] In one embodiment, the support frame comprises a support plate and support legs, the motor engagement gear and the transmission output gear are respectively located on the respective sides of the support plate, the support legs are located on the side of the support plate facing the motor engagement gear, and the support legs are configured to be fixed in the vicinity of the motor output gear.
[0013] In one embodiment, the end of the support leg is configured to be fixed near the motor output gear by welding or screws.
[0014] In one embodiment, the motor engagement gear and the transmission output gear are connected via a cylindrical neck, a circular through-hole is provided in the support plate, the neck passes through the circular through-hole, and therefore the motor engagement gear and the transmission output gear are provided on each side of the support plate, respectively.
[0015] In one embodiment, one end of the neck portion is integrated with the motor engagement gear, and the other end of the neck portion is inserted into the transmission output gear through a through hole and fixedly connected to the transmission output gear.
[0016] In one embodiment, the motor engagement gear has a cylindrical profile.
[0017] According to one embodiment of another aspect of the present disclosure, an electronic lock for a vehicle charging socket is provided, comprising a motor output gear, a transmission gear, and a locking rod rack. The transmission gear is coupled to the motor output gear and the locking rod rack, respectively, to transmit power from the motor to the locking rod rack, and a non-retractable transmission device, as described in any embodiment of the present disclosure, is positioned between the motor output gear and the transmission gear.
[0018] This disclosure offers at least the following advantages: the anti-retraction transmission device of this disclosure is coupled between the motor output gear and the transmission gear, and there is an engagement gap or backlash between the engaged teeth of the motor output gear and the anti-retraction transmission device to buffer slight reverse rotation of the motor output gear. At the moment of power cut-off of the electronic lock, the locking rod of the electronic lock will not be pulled back even if the motor gear reverses.
[0019] To make the purpose, features, and benefits of this disclosure clearer and easier to understand, this disclosure is further described below with reference to the accompanying drawings and specific embodiments. [Brief explanation of the drawing]
[0020] [Figure 1] This is a side view of a non-retractable transmission device connected to a motor output gear, according to one embodiment of the present disclosure. [Figure 2] This is a cross-sectional view showing the connection of a non-retractable transmission device to a motor output gear in a cross-section along the rotational centerline, according to one embodiment of the present disclosure. [Figure 3] This is a cross-sectional view showing the connection of a non-retractable transmission device to a motor output gear in a section perpendicular to the rotational centerline, according to the present disclosure. [Figure 4] This is a side view showing the configuration of connecting a non-retractable transmission device to other components according to one embodiment of the present disclosure. [Modes for carrying out the invention]
[0021] While this disclosure is fully described with reference to the accompanying drawings, including preferred embodiments thereof, it will be understood prior to this description that those skilled in the art can modify the disclosure as described herein while still realizing the technical benefits of this disclosure. Accordingly, it will be understood that the above description is intended to be a broad disclosure to those skilled in the art and is not intended to limit this disclosure to the exemplary embodiments described herein.
[0022] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments disclosed herein. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown schematically in order to simplify the drawing.
[0023] According to a general concept of the present disclosure, a retraction prevention transmission device for a motor output gear is provided, which includes a main body and a support frame. The main body includes a motor engagement gear, which is configured to engage with the motor output gear so as to transmit power from the motor output gear. After the teeth of the motor engagement gear engage with the teeth of the motor output gear, there is a buffer space configured for a preset stroke between the teeth of the motor engagement gear and the teeth of the motor output gear.
[0024] An advantage of the present disclosure is that there is an engagement gap or backlash between the engaged teeth of the motor output gear and the retraction prevention transmission device because the retraction prevention transmission device of the present disclosure is connected between the motor output gear and the transmission gear and buffers a slight reverse rotation of the motor output gear. Therefore, at the moment when the power of the electronic lock is cut off, even if the motor gear reverses, the locking rod of the electronic lock will not be pulled back.
[0025] FIG. 1 is a side view showing the connection of the retraction prevention transmission device to the motor output gear according to an embodiment of the present disclosure. FIG. 2 is a cross-sectional view showing the connection of the retraction prevention transmission device to the motor output gear in a cross-section along the rotation center line according to an embodiment of the present disclosure. FIG. 3 is a cross-sectional view showing the connection of the retraction prevention transmission device to the motor output gear in a cross-section perpendicular to the rotation center line according to an embodiment of the present disclosure.
[0026] An anti-retractable transmission device 100 for a motor output gear 200 according to one embodiment of the present disclosure comprises a body 110 and a support frame 120. The body 110 comprises a motor engaging gear 111. The motor engaging gear 111 meshes with the motor output gear 200 to transmit power from the motor output gear 200. After the teeth of the motor engaging gear 111 mesh with or engage with the teeth of the motor output gear 200, a buffer space configured for a preset stroke exists between the teeth of the motor engaging gear 111 and the teeth of the motor output gear 200. When the motor output gear 200 rotates slightly in the reverse direction, the buffer space between the teeth of the motor engaging gear 111 and the teeth of the motor output gear 200 prevents the motor engaging gear 111 from rotating together with the motor output gear 200. At the same time, the forward movement of the motor engaging gear 111 due to inertia is offset by the reverse rotation of the motor output gear 200.
[0027] In one embodiment, the pre-set stroke of the buffer space is greater than or equal to the reverse rotation stroke of the motor output gear.
[0028] In one embodiment, the motor coupling gear 111 has a cylindrical contour and is equipped with internal teeth 113, the motor output gear 200 is equipped with external teeth 203, the motor coupling gear 111 is fitted onto the outer circumference of the motor output gear 200, and the shape of the groove 114 between the internal teeth 113 of the motor coupling gear 111 is similar to the shape of the external teeth 203 of the motor output gear 200.
[0029] In one embodiment, as shown in Figure 3, in a cross-section perpendicular to the rotation axis of the motor output gear 200, the teeth of the motor output gear 200 are L-shaped, and the grooves 114 between the internal teeth 113 of the motor engaging gear 111 are also L-shaped, with the width of the grooves 114 of the motor engaging gear 111 being greater than the width of the teeth of the motor output gear 200.
[0030] In one embodiment, the difference between the width of the groove 114 of the motor engaging gear 111 and the width of the external teeth 203 of the motor output gear 200 is equal to the preset stroke.
[0031] In one embodiment, the depth of the groove 114 of the motor engagement gear 111 is greater than the height of the external teeth of the motor output gear 200.
[0032] In one embodiment, as shown in Figures 1 and 2, the body 110 further comprises a transmission output gear 115, which is used to transmit power from the motor output gear 200. For example, the transmission output gear 115 may be a bevel gear. However, those skilled in the art will understand that the transmission output gear 115 of the body 110 is not limited to a bevel gear and may be of other types.
[0033] In one embodiment, the support frame 120 comprises a support plate 121 and support legs 122. In the illustrated embodiment, the support plate 121 is rectangular, but is not limited to a rectangle and may have other shapes. The motor engagement gear 111 and the transmission output gear 115 are disposed on each side of the support plate 121, respectively. The support legs 122 are disposed on the side of the support plate 121 facing the motor engagement gear 111 and are fixed near the motor output gear 200. The number of support legs 122 ranges from two to four. In the illustrated embodiment, two support legs 122 are disposed at two corners of the support plate 121 on the same diagonal.
[0034] In one embodiment, the end of the support leg 122 is fixed near the motor output gear 200 by welding or screws. For example, one end of the support leg 122 may be fixed and connected to the support plate 121 by screws, and the other end of the support leg 122 may also be fixed and connected to the motor by screws, or fixed by welding.
[0035] In one embodiment, as shown in Figure 2, the motor engagement gear 111 and the transmission output gear 115 are connected by a cylindrical neck 116. The support plate 121 is provided with a circular through-hole 123 through which the neck 116 passes, so that the motor engagement gear 111 and the transmission output gear 115 are positioned on each side of the support plate 121. The circular through-hole 123 and the neck 116 minimize friction between the circular through-hole 123 and the neck 116 in order to minimize power transmission losses in the motor.
[0036] In one embodiment, as shown in Figure 2, one end of the neck portion 116 is integrated with the motor engagement gear 111, and the other end of the neck portion 116 is inserted into the transmission output gear 115 through the through hole 123 and fixedly connected to the transmission output gear 115.
[0037] In one embodiment, the main body 110 is a rigid, one-piece structure.
[0038] Figure 4 is a side view showing the configuration of the connection between the anti-retraction transmission device 100 and other components according to one embodiment of the present disclosure.
[0039] As shown in Figure 4, an electronic lock 1000 for a vehicle charging socket according to one embodiment of the present disclosure comprises a motor output gear 200, a transmission gear 300, and a locking rod rack 400, wherein the transmission gear 300 is connected to the motor output gear 200 and the locking rod rack 400, respectively, to transmit motor power to the locking rod rack 400, and a non-retractable transmission device 100, as described above, is positioned between the motor output gear 200 and the transmission gear 300.
[0040] The embodiments described above are illustrative and can be improved by those skilled in the art. The structures described in the various embodiments can be freely combined without creating any structural or principle contradictions, thereby enabling a wider variety of anti-retractable transmission devices and electronic locks on the basis of solving the technical problems described herein.
[0041] After describing preferred embodiments of the present disclosure in detail, those skilled in the art will readily understand that various modifications and changes can be made without departing from the scope and spirit of the appended claims, and that the present disclosure is not limited to the exemplary embodiments described herein. Note that the words “comprising,” “comprise,” “including,” “include,” “have,” or “having” do not exclude other elements or steps, and the words “a” or “an” do not exclude plurality. Furthermore, any reference numerals in the claims should not be construed as limiting the scope of the invention.
Claims
1. A non-retractable power transmission device (100) for a motor output gear (200), wherein the non-retractable power transmission device (100) comprises a body (110) and a support frame (120), the body (110) comprises a motor engagement gear (111), and the motor engagement gear (111) is configured to mesh with the motor output gear (200) in order to transmit power from the motor output gear (200), A non-retractable transmission device (100) wherein, after the teeth of the motor engaging gear (111) mesh with the teeth of the motor output gear (200), a buffer space configured for a preset stroke exists between the teeth of the motor engaging gear (111) and the teeth of the motor output gear (200).
2. The anti-retraction type transmission device (100) according to claim 1, wherein the pre-set stroke of the buffer space is greater than or equal to the reverse stroke of the motor output gear.
3. The motor engagement gear (111) is equipped with internal teeth (113), The motor output gear (200) is equipped with external teeth (203), The motor engagement gear (111) is fitted onto the outer circumference of the motor output gear (200), The non-retractable transmission device (100) according to claim 1, wherein the shape of the groove (114) between the internal teeth (113) of the motor engaging gear (111) is similar to the shape of the external teeth (203) of the motor output gear (200).
4. The non-retractable transmission device (100) according to claim 3, wherein in a cross section perpendicular to the rotation axis of the motor output gear (200), the external teeth (203) of the motor output gear (200) are each L-shaped, and the grooves (114) between the internal teeth (113) of the motor engaging gear (111) are also each L-shaped, and the width of the grooves (114) of the motor engaging gear (111) is greater than the width of the external teeth (203) of the motor output gear (200).
5. The non-retractable transmission device (100) according to claim 4, wherein the difference between the width of the groove (114) of the motor engaging gear (111) and the width of the external teeth (203) of the motor output gear (200) is equal to the preset stroke.
6. The non-retractable transmission device (100) according to claim 4, wherein the depth of the groove (114) of the motor engaging gear (111) is greater than the height of the external teeth (203) of the motor output gear (200).
7. The non-retractable transmission device (100) according to any one of claims 1 to 6, wherein the main body (110) further comprises a transmission output gear (115) used to transmit power from the motor output gear (200).
8. The non-retractable transmission device (100) according to claim 7, wherein the transmission output gear (115) is a bevel gear.
9. The support frame (120) comprises a support plate (121) and support legs (122), The motor engagement gear (111) and the transmission output gear (115) are each positioned on the respective sides of the support plate (121). The non-retractable transmission device (100) according to claim 7, wherein the support leg (122) is positioned on the side of the support plate (121) facing the motor engagement gear (111) and is configured to be fixed in the vicinity of the motor output gear (200).
10. The non-retractable transmission device (100) according to claim 9, wherein the end of the support leg (122) is configured to be fixed near the motor output gear (200) by welding or screws.
11. The motor engagement gear (111) and the transmission output gear (115) are connected via a cylindrical neck portion (116). A circular through-hole (123) is provided in the support plate (121), The non-retractable transmission device (100) according to claim 9, wherein the neck portion (116) passes through the circular through hole (123), and therefore the motor engaging gear (111) and the transmission output gear (115) are each provided on the respective sides of the support plate (121).
12. The non-retractable transmission device (100) according to claim 11, wherein one end of the neck portion (116) is integrated with the motor engaging gear (111), and the other end of the neck portion is inserted into the transmission output gear (115) through the through hole (123) and fixedly connected to the transmission output gear (115).
13. The motor engaging gear (111) has a cylindrical contour, the anti-retractable transmission device (100) according to any one of claims 1 to 6.
14. An electronic lock (1000) for a vehicle's charging socket, comprising a motor output gear (200), a transmission gear (300), and a locking rod rack (400), The transmission gear (300) is connected to the motor output gear (200) and the locking rod rack (400) respectively in order to transmit the power of the motor to the locking rod rack (400). An electronic lock (1000) is provided between the motor output gear (200) and the transmission gear (300) of the anti-retraction transmission device (100) according to any one of claims 1 to 13.