Gear shifting mechanism and electric vehicle

Abstract

The embodiment of the present invention provides a shift mechanism and an electric vehicle, wherein the shift mechanism comprises a frame, a first shift motor, a second shift motor, a first shift finger, a second shift finger, a first reduction gear set and a second reduction gear set, all of which are mounted on the frame; the first shift motor and the first shift finger are connected by a first reduction gear set to drive the first shift finger to swing back and forth relative to the frame; the second shift motor and the second shift finger are connected by a second reduction gear set to drive the second shift finger to swing back and forth relative to the frame. The shift mechanism can realize efficient shifting of four gears and has high reliability. The electric vehicle includes the shift mechanism and has all the advantages of the shift mechanism.

Description

Technical Field

[0001] The present invention relates to the field of transmission mechanisms, and in particular to a gear shifting mechanism and an electric vehicle. Background Art

[0002] At present, the transmission of automobiles mainly includes manual transmission and automatic transmission, among which the key technology of automatic transmission lies in its gear selection and shifting actuator. The gear selection and shifting actuator generally includes hydraulic actuator and electromechanical actuator, among which the electromechanical gear selection and shifting actuator has high transmission efficiency, small energy loss, and is more conducive to the fuel economy of the whole vehicle. In the prior art, an electromechanical gear selection and shifting actuator includes a gear selection mechanism and a gear shifting mechanism. When shifting gears, the gear selection mechanism is used to move the gear shifting mechanism to a set position, and then the gear shifting mechanism is started to perform the gear shifting operation.

[0003] The study found that the existing gear selection and shifting actuator has the following defects:

[0004] The gear selection and shifting operation steps are complicated and the gear shifting efficiency is low. Summary of the invention

[0005] Objects of the present invention include, for example, providing a shift mechanism and an electric vehicle that can achieve high-efficiency shifting of four gears.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, an embodiment of the present invention provides a shift mechanism, the shift mechanism comprising:

[0008] A frame, a first shift motor, a second shift motor, a first shift finger, a second shift finger, a first reduction gear set and a second reduction gear set all mounted on the frame; the first shift motor and the first shift finger are transmission connected through the first reduction gear set to drive the first shift finger to swing back and forth relative to the frame; the second shift motor and the second shift finger are transmission connected through the second reduction gear set to drive the second shift finger to swing back and forth relative to the frame.

[0009] In an alternative embodiment:

[0010] The first reduction gear set and / or the second reduction gear set are configured as spur gear reduction gear sets.

[0011] In an alternative embodiment:

[0012] The first reduction gear group includes a first gear shaft, a second gear shaft, a first driving gear and a first driven gear. The first gear shaft is fixedly connected to the output shaft of the first shift motor, the first driving gear is fixedly sleeved outside the first gear shaft, the second gear shaft is installed on the frame, the first driven gear is sleeved outside the second gear shaft and can rotate around its own axis relative to the frame, and the first driving gear is connected to the first shift finger through the first driven gear.

[0013] In an alternative embodiment:

[0014] The first driven gear is set as an incomplete gear. The first reduction gear group also includes a first transmission gear sleeved outside the second gear shaft. The first driven gear and the first transmission gear are relatively fixed in the circumferential direction of the second gear shaft and are arranged along the axial direction of the second gear shaft. The first driving gear is meshed with the first driven gear, and the first transmission gear is meshed with the first shift finger.

[0015] In an alternative embodiment:

[0016] The second reduction gear group includes a third gear shaft, a fourth gear shaft, a second driving gear and a second driven gear. The third gear shaft is fixedly connected to the output shaft of the second shift motor. The second driving gear is fixedly sleeved outside the third gear shaft. The fourth gear shaft is installed on the frame. The second driven gear is sleeved outside the fourth gear shaft and can rotate around its own axis relative to the frame. The second driving gear is connected to the second shift finger transmission through the second driven gear.

[0017] In an alternative embodiment:

[0018] The second driven gear is set as an incomplete gear. The second reduction gear group also includes a second transmission gear sleeved outside the fourth gear shaft. The second driven gear and the second transmission gear are relatively fixed in the circumferential direction of the fourth gear shaft and are arranged along the axial direction of the fourth gear shaft. The second driving gear is meshed with the second driven gear, and the second transmission gear is meshed with the second shift finger.

[0019] In an alternative embodiment:

[0020] The first shift finger includes a first rotating part, a first shift tooth part connected to the circumference of the first rotating part and arranged at intervals along the circumference, and a first toggle part. The first rotating part is rotatably connected to the frame, and the first shift tooth part is transmission-connected to the first reduction gear set. The second shift finger includes a second rotating part, a second shift tooth part connected to the circumference of the second rotating part and arranged at intervals along the circumference, and a second toggle part. The second rotating part is rotatably connected to the frame, and the second shift tooth part is transmission-connected to the second reduction gear set.

[0021] In an alternative embodiment:

[0022] The shift mechanism also includes a connecting shaft connected to the frame. The first shift finger and the second shift finger are both rotatably sleeved outside the connecting shaft and are spaced apart along the axial direction of the connecting shaft.

[0023] In an alternative embodiment:

[0024] The gear shift mechanism also includes a controller, a first angle sensor and a second angle sensor. The first gear shift motor, the second gear shift motor, the first angle sensor and the second angle sensor are all communicatively connected to the controller. The first angle sensor corresponds to the first gear shift finger and is used to detect the rotation angle of the first gear shift finger. The controller controls the rotation of the first gear shift motor according to the rotation angle of the first gear shift finger. The second angle sensor corresponds to the second gear shift finger and is used to detect the rotation angle of the second gear shift finger. The controller controls the rotation of the second gear shift motor according to the rotation angle of the second gear shift finger.

[0025] In a second aspect, an embodiment of the present invention provides an electric vehicle:

[0026] The invention comprises the shifting mechanism in the aforementioned embodiment.

[0027] The beneficial effects of the embodiments of the present invention include, for example:

[0028] In summary, the present embodiment provides a shift mechanism for use with a gearbox to adjust the gear position of the gearbox. The shift mechanism includes a first shift motor, a first reduction gear set and a first shift finger for use in conjunction with each other, and a second shift motor, a second reduction gear set and a second shift finger for use in conjunction with each other. The first shift motor can rotate forward or reverse to realize the first shift finger to swing in the first direction or the second direction. The reciprocating swing of the first shift finger can drive a shift fork shaft of the gearbox to reciprocate along its own axial direction, and finally realize the shift of two gears of the gearbox. Similarly, the second shift motor can control the second shift finger to swing in the first direction or the second direction to control another shift fork shaft of the gearbox to reciprocate along its own axial direction, and realize the shift of the other two gears of the gearbox. In other words, the shift mechanism can realize the shift of four gears of the gearbox, and each shift motor controls two gears respectively without affecting each other. When performing the shift operation, only the corresponding shift motor needs to work to drive the corresponding shift finger to rotate the set angle. Compared with the traditional gear shifting operation, the operation step of selecting gears using the gear selection motor is omitted, and the gear shifting efficiency is higher.

[0029] This embodiment also provides an electric vehicle, including the above-mentioned gear shifting mechanism, which has all the advantages of the gear shifting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic structural diagram of a shift mechanism provided by this embodiment from one perspective;

[0032] Figure 2 A schematic structural diagram of the shift mechanism provided by this embodiment from another perspective;

[0033] Figure 3 A schematic diagram of the structure of the shift mechanism provided in this embodiment (the bottom housing is not shown);

[0034] Figure 4 A schematic diagram of the exploded structure of the shift mechanism provided in this embodiment (the bottom shell is not shown);

[0035] Figure 5 A schematic diagram of the exploded structure of the rack provided in this embodiment;

[0036] Figure 6 A schematic diagram of the structure of a first shift finger provided in this embodiment;

[0037] Figure 7 This is a schematic structural diagram of the second shift finger provided in this embodiment.

[0038] Icons: 001-shift mechanism; 100-frame; 110-top cover; 111-first mounting hole; 112-second mounting hole; 120-bottom shell; 121-groove; 122-opening; 123-bottom wall; 200-first shift motor; 210-first output shaft; 300-second shift motor; 310-second output shaft; 400-first shift finger; 410-first rotating part; 420-first shift tooth part; 430-first toggle part; 500-second shift finger; 510-second rotating part; 52 0-second shifting tooth portion; 530-second shifting portion; 600-first reduction gear set; 610-first gear shaft; 620-second gear shaft; 630-first driving gear; 640-first driven gear; 650-first transmission gear; 700-second reduction gear set; 710-third gear shaft; 720-fourth gear shaft; 730-second driving gear; 740-second driven gear; 750-second transmission gear; 800-connecting shaft; 900-first angle sensor; 010-second angle sensor. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0044] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0045] See also Figure 1 and Figure 2 This embodiment provides a shift mechanism 001, which is used in conjunction with a gearbox to change the gear position of the gearbox to adjust the speed of the output shaft. The shift mechanism 001 has a simple and reasonable structure and can achieve efficient shifting of four gears.

[0046] See also Figure 1 and Figure 3The present embodiment provides a shift mechanism 001, including a frame 100, a first shift motor 200, a second shift motor 300, a first shift finger 400, a second shift finger 500, a first reduction gear set 600 and a second reduction gear set 700, all of which are mounted on the frame 100; the first shift motor 200 is connected to the first shift finger 400 through the first reduction gear set 600 to drive the first shift finger 400 to swing back and forth relative to the frame 100; the second shift motor 300 is connected to the second shift finger 500 through the second reduction gear set 700 to drive the second shift finger 500 to swing back and forth relative to the frame 100.

[0047] The shift mechanism 001 provided in this embodiment includes a first shift motor 200, a first reduction gear set 600 and a first shift finger 400 used in conjunction with each other, and a second shift motor 300, a second reduction gear set 700 and a second shift finger 500 used in conjunction with each other. The first shift motor 200 rotates forward or reversely to realize the first shift finger 400 to swing in the first direction or the second direction, and the reciprocating swing of the first shift finger 400 can drive a shift fork shaft of the gearbox to reciprocate along its own axial direction, and finally realize the shifting of two gears of the gearbox. For example, the first shift motor 200, the first reduction gear set 600 and the first shift finger 400 cooperate to realize the shifting of the first and second gears of the gearbox. Similarly, the second shift motor 300 can control the second shift finger 500 to swing along the first direction or the second direction to control the other shift fork shaft of the gearbox to reciprocate along its own axial direction to achieve the shift of the other two gears of the gearbox. For example, the second shift motor 300, the second reduction gear set 700 and the second shift finger 500 cooperate to achieve the shift of the third and fourth gears of the gearbox. In other words, the shift mechanism 001 can achieve the shift of four gears of the gearbox, and the first shift motor 200 and the second shift motor 300 respectively control two gears without affecting each other. When performing the shift operation, it is only necessary to make the first shift motor 200 or the second shift motor 300 perform corresponding actions to drive the first shift finger 400 or the second shift finger 500 to rotate a set angle. Compared with the traditional shift operation, the operation step of selecting the gear by the gear selection motor is omitted, and the shift efficiency is higher. Among them, the first direction and the second direction are two opposite directions, and the first direction and the second direction are both the swinging directions of the first shift finger 400 or the second finger.

[0048] It should be understood that there is a neutral gear between the two gears. When there is no need to engage a gear, the first shift finger 400 is located at a middle position corresponding to the first and second gears of the gearbox, that is, at a position when the gearbox is in neutral; similarly, the second shift finger 500 is located at a middle position corresponding to the third and fourth gears of the gearbox, that is, at a position when the gearbox is in neutral.

[0049] See also Figure 5 In this embodiment, the frame 100 includes a top cover 110 and a bottom shell 120. The top cover 110 is provided with a first mounting hole 111 and a second mounting hole 112 that penetrate the top cover 110 along the thickness direction of the top cover 110. The first mounting hole 111 and the second mounting hole 112 are arranged at intervals and symmetrically along the length direction of the top cover 110. The first mounting hole 111 and the second mounting hole 112 can be cylindrical holes. Obviously, in other embodiments, the first mounting hole 111 and the second mounting hole 112 can be square column holes, etc. The bottom shell 120 is provided with a groove 121, and the side wall of the bottom shell 120 is provided with an opening 122 that is connected to the groove 121. The top cover 110 is used to cover the bottom shell 120 to close the notch of the groove 121.

[0050] See also Figure 3 In this embodiment, the first reduction gear set 600 and the second reduction gear set 700 are both configured as spur gear reduction gear sets. It should be understood that in other embodiments, one of the first reduction gear set 600 and the second reduction gear set 700 may be configured as a spur gear reduction gear set, and the other may not be configured as a spur gear reduction gear set. The first reduction gear set 600 and the second reduction gear set 700 are both configured as spur gear reduction gear sets, which is convenient for processing and manufacturing, easy for installation, and has high transmission efficiency.

[0051] See also Figure 3 and Figure 4In this embodiment, the first reduction gear set 600 includes a first gear shaft 610, a second gear shaft 620, a first driving gear 630, a first driven gear 640 and a first transmission gear 650. The first gear shaft 610 is used to be fixedly connected to the output shaft of the first shift motor 200, the first driving gear 630 is fixedly sleeved outside the first gear shaft 610, the second gear shaft 620 is installed on the frame 100, the first driven gear 640 and the first transmission gear 650 are both sleeved outside the second gear shaft 620, and optionally, the first driven gear 640 and the first transmission gear 650 are both fixed on the second gear shaft 620, the first driven gear 640 and the first transmission gear 650 are relatively fixed in the circumferential direction of the second gear shaft 620, and the second gear shaft 620 is rotatably connected to the frame 100, thereby realizing the synchronous rotation of the first driven gear 640 and the first transmission gear 650. The first driving gear 630 meshes with the first driven gear 640, and the first transmission gear 650 is used to mesh with the first shift finger 400, so that the first shift motor 200 transmits power to the first shift finger 400, thereby driving the first shift finger 400 to swing back and forth. Further, the first driven gear 640 is an incomplete gear, for example, the first driven gear 640 is a sector gear. In other words, the first driven gear 640 is a gear with teeth grooves on part of its circumference, which is different from the structure of a full gear with teeth grooves evenly arranged on the entire circumference. The first driven gear 640 is set as an incomplete gear, which is small in size, occupies a small space, saves installation space, and makes the shift mechanism 001 more compact.

[0052] See also Figure 3 and Figure 4In this embodiment, the second reduction gear set 700 includes a third gear shaft 710, a fourth gear shaft 720, a second driving gear 730, a second driven gear 740 and a second transmission gear 750. The third gear shaft 710 is used to be fixedly connected to the output shaft of the second shift motor 300, the second driving gear 730 is fixedly sleeved outside the third gear shaft 710, the fourth gear shaft 720 is installed on the frame 100, the second driven gear 740 and the second transmission gear 750 are both sleeved outside the fourth gear shaft 720, and optionally, the second driven gear 740 and the second transmission gear 750 are both fixed on the fourth gear shaft 720, the second driven gear 740 and the second transmission gear 750 are relatively fixed in the circumferential direction of the fourth gear shaft 720, and the fourth gear shaft 720 is rotatably connected to the frame 100, thereby realizing the synchronous rotation of the second driven gear 740 and the second transmission gear 750. The second driving gear 730 meshes with the second driven gear 740, and the second transmission gear 750 is used to mesh with the second shift finger 500, so that the second shift motor 300 transmits power to the second shift finger 500, thereby driving the second shift finger 500 to swing back and forth. Further, the second driven gear 740 is an incomplete gear, for example, the second driven gear 740 is a sector gear. In other words, the second driven gear 740 is a gear with teeth grooves on part of its circumference, which is different from the structure of a full gear with teeth grooves evenly arranged on the entire circumference. The second driven gear 740 is set as an incomplete gear, which is small in size, occupies a small space, saves installation space, and makes the shift mechanism 001 more compact.

[0053] See also Figure 6 In this embodiment, the first shift finger 400 includes a first rotating portion 410, a first shift tooth portion 420 connected to the circumference of the first rotating portion 410 and arranged at intervals along the circumference, and a first shifting portion 430. The first rotating portion 410 is rotatably connected to the frame 100, and the first shift tooth portion 420 is used for transmission connection with the first reduction gear set 600. The first shift tooth portion 420 is arranged on a part of the circumference of the first rotating portion 410. In other words, the first rotating portion 410 and the first shift tooth portion 420 constitute an incomplete gear, and the first shift tooth portion 420 can be fan-shaped. The first shift finger 400 is small in size, occupies little space, and saves installation space.

[0054] See also Figure 7In this embodiment, the second shift finger 500 includes a second rotating portion 510, a second shift tooth portion 520 connected to the circumference of the second rotating portion 510 and arranged at intervals along the circumference, and a second shifting portion 530. The second rotating portion 510 is rotatably connected to the frame 100, and the second shift tooth portion 520 is used for transmission connection with the second reduction gear set 700. The second shift tooth portion 520 is arranged on a part of the circumference of the second rotating portion 510. In other words, the second rotating portion 510 and the second shift tooth portion 520 form an incomplete gear, and the second shift tooth portion 520 can be fan-shaped. The second shift finger 500 is small in size, occupies little space, and saves installation space.

[0055] In this embodiment, the shift mechanism 001 further includes a connecting shaft 800 , and the first shift finger 400 and the second shift finger 500 are both rotatably mounted on the connecting shaft 800 . The connecting shaft 800 is used to be fixedly mounted on the frame 100 .

[0056] In the shift mechanism 001 of this embodiment, the first shift motor 200 and the second shift motor 300 are respectively screwed and fixed on the top cover 110 through the flange structure, and the first output shaft 210 of the first shift motor 200 is inserted in the first mounting hole 111 and is coaxial with the first mounting hole 111, and the second output shaft 310 of the second shift motor 300 is inserted in the second mounting hole 112 and is coaxial with the second mounting hole 112. The first gear shaft 610 is fixed on the first output shaft 210, and the end of the first gear shaft 610 away from the first output shaft 210 is supported on the bottom wall 123 of the bottom shell 120 through a bearing, and the first driving gear 630 is fixedly sleeved outside the first gear shaft 610. The two ends of the second gear shaft 620 are supported between the top cover 110 and the bottom wall 123 of the bottom shell 120 through bearings, the first driven gear 640 is fixedly sleeved outside the second gear shaft 620, the first transmission gear 650 is fixedly sleeved outside the second gear shaft 620, and the first driven gear 640 is closer to the bottom shell 120 than the first transmission gear 650. The two ends of the connecting shaft 800 are supported between the top cover 110 and the bottom wall 123 of the bottom shell 120, the first rotating portion 410 of the first shift finger 400 is rotatably sleeved outside the connecting shaft 800, the first transmission gear 650 is meshed with the first shift tooth portion 420 of the first shift finger 400, and the first shifting portion 430 of the first shift finger 400 extends out of the opening 122 on the side wall of the bottom shell 120. The third gear shaft 710 is fixed on the second output shaft 310, and the end of the third gear shaft 710 away from the second output shaft 310 is supported on the bottom wall 123 of the bottom shell 120 through a bearing, and the second driving gear 730 is fixedly sleeved outside the third gear shaft 710. Both ends of the fourth gear shaft 720 are supported between the top cover 110 and the bottom wall 123 of the bottom shell 120 through bearings, respectively, the second driven gear 740 is fixedly sleeved outside the fourth gear shaft 720, and the second transmission gear 750 is fixedly sleeved outside the fourth gear shaft 720, and the second driven gear 740 is closer to the top cover 110 than the second transmission gear 750. The second rotating portion 510 of the second shift finger 500 is rotatably sleeved outside the connecting shaft 800, the second shift finger 500 is closer to the bottom shell 120 than the first shift finger 400, the second transmission gear 750 is meshed with the second shift tooth portion 520 of the second shift finger 500, and the second shifting portion 530 of the second shift finger 500 extends out of the opening 122 on the side wall of the bottom shell 120. In the shift mechanism 001 provided in this embodiment, the connecting shaft 800 is located between the second gear shaft 620 and the fourth gear shaft 720, the second gear shaft 620 and the fourth gear shaft 720 are located between the first gear shaft 610 and the third gear shaft 710, the first shift finger 400 and the second shift finger 500 are both sleeved outside the connecting shaft 800, and the first driven gear 640 and the second driven gear 740 are both configured as incomplete gears, so that the entire shift mechanism 001 has a compact structure and a small volume.

[0057] See also Figure 2 and Figure 3 In other embodiments, the shift mechanism 001 also includes a controller, a first angle sensor 900 and a second angle sensor 010. The first shift motor 200, the second shift motor 300, the first angle sensor 900 and the second angle sensor 010 are all communicatively connected to the controller. The first angle sensor 900 is installed on the bottom shell 120 and is transmission-connected to the second gear shaft 620. It can detect the rotation angle of the second gear shaft 620, and then obtain the rotation angle of the first shift finger 400. The controller can control the rotation of the first shift motor 200 according to the rotation angle of the first shift finger 400, so that the first shift motor 200 drives the first shift finger 400 to swing to a set position, thereby completing the shifting of the corresponding gear of the gearbox. The second angle sensor 010 is mounted on the bottom shell 120 and is in transmission connection with the fourth gear shaft 720, and can detect the rotation angle of the fourth gear shaft 720, and then obtain the rotation angle of the second shift finger 500. The controller controls the second shift motor 300 to rotate according to the rotation angle of the second shift finger 500, so that the second shift motor 300 drives the second shift finger 500 to swing to a set position, completing the gear shift of the corresponding gear of the gearbox. By setting the angle sensors to detect the angles of the first shift finger 400 and the second shift finger 500 respectively, the gear shifting is safer and more reliable.

[0058] The shift mechanism 001 provided in this embodiment can achieve efficient shifting of four gears.

[0059] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A gear shift mechanism, characterized in that: The shift mechanism comprises: a frame, a first shift motor, a second shift motor, a first shift finger, a second shift finger, a first reduction gear set and a second reduction gear set, all of which are mounted on the frame; the first shift motor is connected to the first shift finger through the first reduction gear set to drive the first shift finger to swing back and forth relative to the frame; the second shift motor is connected to the second shift finger through the second reduction gear set to drive the second shift finger to swing back and forth relative to the frame; The shift mechanism further comprises a connecting shaft, the first shift finger and the second shift finger are both rotatably mounted on the connecting shaft, and the connecting shaft is fixedly mounted on the frame.

2. The shift mechanism according to claim 1, characterized in that: The first reduction gear set and / or the second reduction gear set are configured as spur gear reduction gear sets.

3. The shift mechanism according to claim 1, characterized in that: The first reduction gear set includes a first gear shaft, a second gear shaft, a first driving gear and a first driven gear. The first gear shaft is fixedly connected to the output shaft of the first shift motor. The first driving gear is fixedly sleeved outside the first gear shaft. The second gear shaft is installed on the frame. The first driven gear is sleeved outside the second gear shaft and can rotate around its own axis relative to the frame. The first driving gear is connected to the first shift finger through the first driven gear.

4. The shift mechanism according to claim 3, characterized in that: The first driven gear is set as an incomplete gear, and the first reduction gear group also includes a first transmission gear sleeved outside the second gear shaft. The first driven gear and the first transmission gear are relatively fixed in the circumferential direction of the second gear shaft and are arranged along the axial direction of the second gear shaft; the first driving gear is meshed with the first driven gear, and the first transmission gear is meshed with the first shift finger.

5. The shift mechanism according to claim 1, characterized in that: The second reduction gear set includes a third gear shaft, a fourth gear shaft, a second driving gear and a second driven gear. The third gear shaft is fixedly connected to the output shaft of the second shift motor. The second driving gear is fixedly sleeved outside the third gear shaft. The fourth gear shaft is installed on the frame. The second driven gear is sleeved outside the fourth gear shaft and can rotate around its own axis relative to the frame. The second driving gear is transmission-connected to the second shift finger through the second driven gear.

6. The shift mechanism according to claim 5, characterized in that: The second driven gear is configured as an incomplete gear, and the second reduction gear set also includes a second transmission gear sleeved outside the fourth gear shaft, the second driven gear and the second transmission gear are relatively fixed in the circumferential direction of the fourth gear shaft and are arranged along the axial direction of the fourth gear shaft; the second driving gear is meshed with the second driven gear, and the second transmission gear is meshed with the second shift finger.

7. The shift mechanism according to claim 1, characterized in that: The first shift finger includes a first rotating portion, a first shift tooth portion connected to a circumferential surface of the first rotating portion and arranged at intervals along the circumferential surface, and a first toggle portion, the first rotating portion is rotatably connected to the frame, and the first shift tooth portion is transmission-connected to the first reduction gear set; the second shift finger includes a second rotating portion, a second shift tooth portion connected to a circumferential surface of the second rotating portion and arranged at intervals along the circumferential surface, and a second toggle portion, the second rotating portion is rotatably connected to the frame, and the second shift tooth portion is transmission-connected to the second reduction gear set.

8. The shift mechanism according to any one of claims 1 to 7, characterized in that: The shift mechanism further includes a connecting shaft, which is connected to the frame. The first shift finger and the second shift finger are both rotatably sleeved outside the connecting shaft and are spaced apart along the axial direction of the connecting shaft.

9. The shift mechanism according to claim 1, characterized in that: The shift mechanism also includes a controller, a first angle sensor and a second angle sensor. The first shift motor, the second shift motor, the first angle sensor and the second angle sensor are all communicatively connected to the controller. The first angle sensor corresponds to the first shift finger and is used to detect the rotation angle of the first shift finger. The controller controls the rotation of the first shift motor according to the rotation angle of the first shift finger. The second angle sensor corresponds to the second shift finger and is used to detect the rotation angle of the second shift finger. The controller controls the rotation of the second shift motor according to the rotation angle of the second shift finger.

10. An electric vehicle, characterized in that: The invention comprises the shifting mechanism according to any one of claims 1 to 9.

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