Labor-saving transmission mechanism for unlocking charging small door motor

Abstract

The invention relates to a labor-saving transmission mechanism for unlocking a charging small door motor. The labor-saving transmission mechanism comprises a gear transmission set (1) and an inhaul cable transmission set (2). The gear transmission set (1) is a four-stage gear set, a first gear (11) and the inhaul cable transmission set (2) are coaxially arranged and meshed with a second gear (12), the second gear (12) and a third gear (13) are coaxially arranged, and a fourth gear (14) and the motor (3) are coaxially arranged and meshed with the third gear (13). And the inhaul cable transmission group (2) comprises a winch (21) and an inhaul cable (22) wound on the winch (21). Compared with the prior art, meshing transmission of multiple sets of gears and the inhaul cable are combined, step-by-step increasing transmission of torque to the motor side is achieved, and finally the purpose of unlocking a large-torque motor through small tension can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive component processing, and particularly to a labor-saving transmission mechanism for unlocking a charging door motor. Background Art

[0002] The charging door is used to close or open a charging port in the vehicle body of a vehicle with an electric drive, and a charging gun can charge the in-vehicle battery through the charging port. In new energy vehicles, the charging door can replace the fuel filling port on traditional vehicles. The charging port door mainly borrows the structure of a traditional mechanical fuel filler cap, that is, after the vehicle is unlocked, the opening and closing of the charging port door are realized through manual operation. Affected by the vehicle layout, the actual space around the charging door is small. When choosing a motor with a large torque, a greater pulling force or a larger space is required for manual unlocking.

[0003] Therefore, in order to unlock a large-torque motor with a smaller pulling force in a narrow space, a transmission mechanism that can save space and effort needs to be designed. Summary of the Invention

[0004] The purpose of the present invention is to provide a labor-saving transmission mechanism for unlocking a charging door motor, so as to realize unlocking a large-torque motor with a smaller pulling force in a narrow space.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A labor-saving transmission mechanism for unlocking a charging door motor includes a gear transmission group and a cable transmission group; the gear transmission group includes a first gear, a second gear, a third gear, and a fourth gear; the first gear is coaxially arranged with the cable transmission group and meshes with the second gear, the second gear and the third gear are coaxially arranged, and the fourth gear is coaxially arranged with the motor and meshes with the third gear;

[0007] The cable transmission group includes a cable for receiving an external force, the cable is wound around a winch, and the winch is coaxially arranged with the first gear.

[0008] Further, the gear transmission group includes a first gear shaft, and both the first gear and the winch are fixedly installed on the first gear shaft.

[0009] Further, an annular limiting boss is provided on the shaft body of the first gear shaft, and the first gear and the winch are respectively installed between adjacent annular limiting bosses.

[0010] Further, the gear transmission group includes a second gear shaft, and annular limiting bosses are provided on the shaft body of the second gear shaft, and both the second gear and the third gear are fixedly installed between adjacent annular limiting bosses.

[0011] Further, the gear transmission group includes a third gear shaft, and an annular limiting boss is provided on the shaft body of the third gear shaft.

[0012] Further, the fourth gear is fixedly installed between the annular limiting bosses.

[0013] Further, one end of the third gear shaft is provided with a spline shaft that can be inserted into the motor.

[0014] Further, the spline shaft is in mating connection with the internal spline of the motor.

[0015] Further, the pitch circle radius of the first gear is 5 - 15 mm, preferably 10 mm.

[0016] Further, the pitch circle radius of the second gear is 20 - 30 mm, preferably 25 mm.

[0017] Further, the pitch circle radius of the third gear is 5 - 15 mm, preferably 10 mm.

[0018] Further, the pitch circle radius of the fourth gear is 20 - 30 mm, preferably 25 mm.

[0019] Further, the inner circle radius of the winch is 15 - 25 mm, preferably 20 mm.

[0020] Further, a winding path for the cable to wind is provided on the winch to ensure that the cable does not get entangled in the winch and does not affect the rotation of the winch.

[0021] Further, an outer shell for blocking particulate matter is provided outside the gear transmission group and the cable transmission group to reduce the intrusion of external particulate matter and ensure the overall movement stability of the device.

[0022] The present invention also provides an unlocking method for a charging door motor, which uses the above-mentioned labor-saving transmission mechanism for unlocking the charging door motor.

[0023] Further, when a pulling force of 20 - 30 N is applied to one end of the cable, a torque of 0.4 - 0.6 N·m can be obtained at the winch end, and the same torque can be obtained at the first gear; through the meshing of the first gear and the second gear, the torque can be amplified to 1 - 1.5 N·m, and the same torque can be obtained at the third gear; through the meshing of the third gear and the fourth gear, the torque can be amplified to 2.5 - 3.75 N·m, and the motor can complete the unlocking.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The present invention realizes the step-by-step increasing transmission of torque towards the motor side through the meshing transmission of multiple groups of gears, reduces the required external load of the cable, and achieves the purpose of unlocking a high-torque motor (2.5 N·m) with a small pulling force (20 N).

[0026] (2) The present invention combines a gear transmission group with a cable transmission group, rather than setting redundant racks, and can greatly reduce the space used during the unlocking process by means of the nested combination of a winch and a gear group.

[0027] (3) The gear shafts of the present invention all adopt variable-diameter gear shafts, and the grooves formed at the variable-diameter parts play a role in limiting the gears, which is beneficial to improving the stability during the overall operation.

[0028] (4) The force transmission mechanism of the present invention is simple. Through the cooperation of a cable and a gear group, it can complete the unlocking of a high-torque motor with a small pulling force in a narrow space, and is expected to be widely applied in the production of new energy vehicles. Brief Description of the Drawings

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the cable transmission assembly and the first gear of the present invention.

[0031] Figure 3 It is a schematic diagram of the second gear and the third gear of the present utility model.

[0032] Figure 4 It is a schematic diagram of the fourth gear and the motor of the present utility model.

[0033] Figure 5 It is a schematic diagram of the winch of the present invention.

[0034] Explanation of the marks in the figure:

[0035] 1 - Gear transmission group, 11 - First gear, 12 - Second gear, 13 - Third gear, 14 - Fourth gear, 15 - First gear shaft, 16 - Second gear shaft, 17 - Third gear shaft, 171 - Spline shaft; 2 - Cable transmission group, 21 - Winch, 22 - Cable; 3 - Motor. Detailed Embodiment

[0036] The present invention will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and gives detailed implementation manners and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0037] In the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; in addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] Embodiment 1:

[0040] A labor-saving transmission mechanism for unlocking the charging door motor, which includes a gear transmission group 1 and a cable transmission group 2.

[0041] The gear transmission group 1 includes a first gear 11, a second gear 12, a third gear 13, and a fourth gear 14. The first gear 11 is coaxially arranged with the cable transmission group 2 and meshes with the second gear 12. The second gear 12 and the third gear 13 are coaxially arranged. The fourth gear 14 is coaxially arranged with the motor 3 and meshes with the third gear 13.

[0042] The cable transmission group 2 includes a cable 22 for receiving an external force. The cable 22 is wound around a winch 21, and the winch 21 is coaxially arranged with the first gear 11. When a relatively small pulling force is applied to one end of the cable 22, the torque can be gradually amplified through the cooperation of the gears in the gear transmission group 1, so that the motor 3 can be easily unlocked.

[0043] Embodiment 2:

[0044] A labor-saving transmission mechanism for unlocking the charging door motor, which is composed of a gear transmission group 1 and a cable transmission group 2.

[0045] The gear transmission group 1 includes a first gear 11, a second gear 12, a third gear 13, a fourth gear 14, and a first gear shaft 15, a second gear shaft 16, and a third gear shaft 17. The first gear 11, the second gear 12, the third gear 13, and the fourth gear 14 are all fixedly installed on the gear shafts. Among them, an annular limiting boss is provided on the shaft body of the first gear shaft 15. The first gear 11 and the winch 21 are respectively installed between adjacent annular limiting bosses, and the first gear 11 meshes with the second gear 12. An annular limiting boss is provided on the shaft body of the second gear shaft 16. The second gear 12 and the third gear 13 are both installed between adjacent annular limiting bosses. An annular limiting boss is provided on the shaft body of the third gear shaft 17. The fourth gear 14 is installed between the annular limiting bosses and the fourth gear 14 meshes with the third gear 13. In addition, a spline shaft 171 that can be inserted into the motor 3 is provided at the end of the third gear shaft 17, and the spline shaft 171 is in mating connection with the internal spline of the motor 3. In this embodiment, the pitch circle radius of the first gear 11 is 10 mm, the pitch circle radius of the second gear 12 is 25 mm, the pitch circle radius of the third gear 13 is 10 mm, and the pitch circle radius of the fourth gear 14 is 25 mm.

[0046] The cable transmission group 2 and the first gear 11 are both installed on the first gear shaft 15. The cable transmission group 2 includes a cable 22 for receiving an external force. The cable 22 is wound around the winch 21, and the winch 21 is coaxially arranged with the first gear 11. In this embodiment, the inner circle radius of the winch 21 is 20 mm, and a winding path for the cable 22 to wind is provided on the winch 21 to ensure that the cable 22 does not get entangled in the winch 21.

[0047] This embodiment also provides an unlocking method for the charging door motor. By applying a certain pulling force to one end of the cable 22, the unlocking of the motor 3 can be completed through the gear transmission group 1. If a pulling force of 20 N is applied to one end of the cable 22, a torque of 0.4 N·m can be obtained at the winch 21 end, and the same torque can be obtained at the first gear 11; through the meshing of the first gear 11 and the second gear 12, the torque can be amplified to 1 N·m, and the same torque can be obtained by the third gear 13; through the meshing of the third gear 13 and the fourth gear 14, the torque can be amplified to 2.5 N·m, and the motor 3 can be unlocked.

[0048] Embodiment 3:

[0049] This embodiment provides a labor-saving transmission mechanism for unlocking a charging door motor. As Figures 1-5As shown in the figure, the motor 3 is connected to the gear transmission group 1, and the spline shaft 171 of the gear transmission group 1 is inserted into the motor 3. A fourth gear 14 with a pitch circle radius of 25 mm is provided on the third gear shaft 17, and the fourth gear 14 meshes with a third gear 13 with a pitch circle radius of 10 mm. A second gear 12 with a pitch circle radius of 25 mm is coaxially arranged with the third gear 13, the second gear 12 meshes with a first gear 11 with a pitch circle radius of 10 mm, and a winch 21 with an inner circle radius of 20 mm is coaxially arranged with the first gear 11. A cable 22 is wound around the winch 21.

[0050] This embodiment also provides an unlocking method for the charging door motor, that is, applying a certain pulling force at one end of the cable 22 can complete the unlocking of the motor 3 through the gear transmission group 1. Applying a pulling force of 20 - 30 N at one end of the cable 22 can obtain a torque of 0.4 - 0.6 N·m at the winch 21 end and the same torque at the first gear 11; through the meshing of the first gear 11 and the second gear 12, the torque can be amplified to 1 - 1.5 N·m, and the third gear 13 can obtain the same torque; through the meshing of the third gear 13 and the fourth gear 14, the torque can be amplified to 2.5 - 3.75 N·m, and the motor can complete the unlocking.

[0051] In this embodiment, the winch 21 is used to replace the rack to save space. If the motor needs to rotate 210° to complete unlocking, then the fourth gear 14 needs to rotate 210°, the third gear 13 meshing with the fourth gear 14 needs to rotate 525°, the coaxial second gear 12 also needs to rotate 525°, and the first gear 11 meshing with the second gear 12 needs to rotate 1312.5°. If the winch 21 coaxial with the first gear 11 is replaced with a gear with a pitch circle radius of 20 mm, then this gear also needs to rotate 1312.5°, and the rack meshing with this gear needs to move 458.15 mm, resulting in excessive space requirements. Therefore, a winch 21 with an inner circle radius of 20 mm is adopted, and the winch 21 is directly connected to the cable 22, eliminating the need for a rack.

[0052] Figure 5 It is a structural schematic diagram of the winch. To ensure that the cable 22 does not get entangled in the winch 21 and affect the rotation of the winch 21, the winding path of the cable 22 is designed on the winch 21. In addition, to ensure the motion stability of the entire gear transmission group 1 and the winch 21, a gear group housing is added to reduce the intrusion of external particulate matter.

[0053] The above description of the embodiments is provided to enable those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A labor-saving transmission mechanism for unlocking the charging door motor, characterized in that, It includes a gear transmission group (1) and a cable transmission group (2); The gear transmission group (1) includes a first gear (11), a second gear (12), a third gear (13) and a fourth gear (14); the first gear (11) is coaxially arranged with the cable transmission group (2) and meshes with the second gear (12), the second gear (12) and the third gear (13) are coaxially arranged, and the fourth gear (14) is coaxially arranged with the motor (3) and meshes with the third gear (13); The cable transmission group (2) includes a cable (22) for receiving an external force, the cable (22) is wound around a winch (21), and the winch (21) is coaxially arranged with the first gear (11).

2. The labor-saving transmission mechanism for unlocking the charging door motor according to claim 1, characterized in that, The gear transmission group (1) includes a first gear shaft (15), and both the first gear (11) and the winch (21) are installed on the first gear shaft (15); An annular limiting boss is provided on the shaft body of the first gear shaft (15), and the first gear (11) and the winch (21) are respectively installed between adjacent annular limiting bosses.

3. The labor-saving transmission mechanism for unlocking the charging door motor according to claim 1, characterized in that The gear transmission group (1) includes a second gear shaft (16), and annular limiting bosses are provided on the shaft body of the second gear shaft (16), and both the second gear (12) and the third gear (13) are installed between adjacent annular limiting bosses.

4. The labor-saving transmission mechanism for unlocking the charging door motor according to claim 1, characterized in that, The gear transmission group (1) includes a third gear shaft (17), and annular limiting bosses are provided on the shaft body of the third gear shaft (17), and the fourth gear (14) is installed between the annular limiting bosses.

5. The labor-saving transmission mechanism for unlocking the charging door motor according to claim 5, characterized in that, A spline shaft (171) capable of being inserted into the motor (3) is provided at the end of the third gear shaft (17), and the spline shaft (171) is in mating connection with the internal spline of the motor (3).

6. The labor-saving transmission mechanism for unlocking the charging door motor according to claim 1, wherein The pitch circle radius of the first gear (11) is 5 - 15 mm; The pitch circle radius of the second gear (12) is 20 - 30 mm; The pitch circle radius of the third gear (13) is 5 - 15 mm; The pitch circle radius of the fourth gear (14) is 20 - 30 mm.

7. The labor-saving transmission mechanism for unlocking the charging door motor according to claim 1, characterized in that, The inner circle radius of the winch (21) is 15 - 25 mm.

8. The labor-saving transmission mechanism for unlocking the charging door motor according to claim 1, wherein, The winch (21) is provided with a winding path for the cable (22) to wind around.

9. An effort-saving transmission mechanism for unlocking a charging door motor according to claim 1, characterized in that, A housing for blocking particulate matter is provided outside the gear transmission group (1) and the cable transmission group (2).

10. A method for unlocking a charging door motor, characterized in that, Use the labor-saving transmission mechanism for unlocking the charging door motor according to any one of claims 1 - 9.

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