Battery replacement system of electric automobile

Abstract

The utility model discloses a battery replacing system for an electric automobile. The battery replacing system comprises the electric automobile, a transfer trolley and a battery replacing cabinet, a battery bin is arranged at the bottom of the electric vehicle and provided with a battery bearing frame and a lifting device, the battery bearing frame bears a battery, and a notch allowing the battery bearing frame to enter and exit is formed in the bottom end of the battery bin. The transfer trolley runs between the electric vehicle and the battery replacement cabinet; the transfer trolley is provided with a battery angle identification assembly and a battery angle adjustment assembly which are electrically connected with each other; the battery replacement cabinet is provided with a battery taking and conveying device; the battery taking and conveying device is used for taking out electricity in the battery replacement cabinet and transferring a battery to the transfer trolley or receiving the battery from the transfer trolley and putting the battery into the battery replacement cabinet; no matter whether the parking angle of the electric automobile meets the battery replacement requirement or not, the transfer trolley can grab the battery and correct or reset the angle of the battery, and the battery replacement is not influenced by the parking angle of the electric automobile.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle battery swapping, in particular to an electric vehicle battery swapping system. Background Art

[0002] With the wide application of electric vehicles, consumers have put forward higher requirements for the vehicle's endurance and charging efficiency. In order to alleviate the endurance anxiety of electric vehicle users and shorten the charging waiting time, battery swapping technology has gradually become the focus of the industry. At present, one of the more popular battery swapping methods in the market is chassis battery swapping technology.

[0003] The working principle of chassis battery swapping technology is as follows: The electric vehicle drives into the battery swapping station, and the automatic guided vehicle (AGV) moves to the bottom of the vehicle. The battery compartment at the bottom of the vehicle unlocks and releases the battery. The AGV takes out the empty battery and sends the fully charged battery into the vehicle battery compartment. However, the existing chassis battery swapping technology has the following problems:

[0004] In the existing chassis battery swapping process, the battery is located in the vehicle battery compartment. After the battery compartment descends, the battery needs to move out from the front, back or side for the AGV to operate. However, during actual parking, the vehicle may deviate from the standard parking angle, which causes the battery to be unable to be accurately docked due to the angle deviation when the AGV loads the fully charged battery into the vehicle battery compartment or takes out the empty battery and puts it into the battery swapping cabinet of the battery swapping station. This problem not only affects the battery swapping efficiency but also may cause equipment damage and safety hazards. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an electric vehicle battery swapping system to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model provides the following solution:

[0007] An electric vehicle battery swapping system includes an electric vehicle, a transfer trolley, and a battery swapping cabinet;

[0008] A battery compartment is provided at the bottom of the electric vehicle. The battery compartment is provided with a battery carrying frame and a lifting device for driving the battery carrying frame to extend into or out of the interior of the battery compartment in the vertical direction. The battery carrying frame carries the battery, and a notch for the battery carrying frame to enter and exit is opened at the bottom end of the battery compartment;

[0009] The transfer trolley runs between the electric vehicle and the battery swapping cabinet;

[0010] The transfer trolley is provided with a battery angle recognition component and a battery angle adjustment component that are electrically connected to each other;

[0011] The battery swap cabinet is provided with a battery picking and delivering device, which is used to take out the battery in the battery swap cabinet and transfer the battery to a transfer vehicle, or to take the battery from the transfer vehicle and place the battery in the battery swap cabinet.

[0012] Furthermore, the power exchange cabinet is also provided with a track, and a cabinet door is provided at one end of the power exchange cabinet facing the electric vehicle. One end of the track extends through the cabinet door to the interior of the power exchange cabinet, and the other end of the track extends to the position below the battery compartment of the electric vehicle. The opening size of the cabinet door is adapted to the size of the transfer cart.

[0013] Furthermore, it also includes a parking platform, wherein the front end and the rear end of the parking platform have slopes;

[0014] The parking platform also includes a parking barrier and a guardrail, wherein the parking barrier can be raised or lowered to resist or release the wheels of the electric vehicle.

[0015] Further, the lifting device includes a pull-rope motor, a suspension part and a steel wire rope, the steel wire rope is wired around a plurality of suspension parts fixed around the battery carrying frame, and the steel wire rope is wound around the output end of the pull-rope motor;

[0016] The hanging part is composed of a plurality of sliding wheels or a plurality of hooks or a combination of a plurality of sliding wheels and hooks.

[0017] Further, the lifting device includes a lifting assembly and a supporting assembly;

[0018] The lifting assembly includes an electric push rod;

[0019] The support assembly includes a support member with an opening at the bottom end of the hollow structure and a support plate of the hollow structure;

[0020] The support member is rotatably arranged at the bottom of the electric vehicle, and the support plate is arranged at the bottom end of the support member; the support member and the support plate are both arranged at the top of the battery compartment;

[0021] The battery compartment is also provided with a rotating assembly, which includes a driven gear plate with a hollow structure, a driving gear and a gear drive motor;

[0022] The driven gear plate is arranged between the battery compartment and the support plate, and is connected to the bottom end of the support plate. The driving gear is meshed with the driven gear plate. The driving gear is sleeved on the output end of the gear drive motor. The gear drive motor drives the driving gear to rotate.

[0023] The fixed end of the electric push rod is arranged inside the support member, and the moving end of the electric push rod sequentially passes through the support member, the support disc, the driven gear disc and the top of the battery compartment in the vertical direction and is connected to the battery carrying frame.

[0024] Further, the lifting device includes a lifting assembly and a support assembly;

[0025] The lifting assembly includes an electric push rod;

[0026] The fixed end of the electric push rod is arranged at the bottom of the chassis of the electric vehicle, and the moving end of the electric push rod extends into the battery compartment in the vertical direction and is connected with a fixing plate;

[0027] A battery is arranged inside the battery compartment, and a notch for the battery to enter and exit is opened at the bottom end of the battery compartment;

[0028] The support assembly includes a fixing member, a moving rod and a connecting member;

[0029] The fixing member is arranged through the top of the battery compartment, the moving rod is slidably arranged inside the fixing member, the bottom end of the moving rod is fixedly connected with the connecting member, and the connecting member is arranged on the fixing plate;

[0030] The top end of the moving rod extends out of the fixing member and is provided with a limiting assembly for preventing the moving rod from disengaging from the fixing member;

[0031] A rotating assembly is further arranged on the top of the battery carrying frame, and the rotating assembly includes a driven gear disc, a driving gear and a gear driving motor;

[0032] The driven gear disc is rotatably arranged at the bottom end of the fixing plate, the driven gear disc is fixedly connected with the top of the battery carrying frame, the driving gear is meshed with the driven gear disc, the driving gear is sleeved on the output end of the gear driving motor, and the gear driving motor drives the driving gear to rotate.

[0033] Through the above technical solutions, compared with the prior art, the beneficial effects of the present utility model are as follows:

[0034] 1. Regardless of whether the parking angle of the electric vehicle meets the requirements of battery replacement, the transfer trolley can grasp the battery and correct or reset the battery angle, and the battery replacement is not affected by the parking angle of the electric vehicle.

[0035] 2. The cooperation between the battery carrying frame and the lifting device can realize the extension of the battery from the bottom of the battery compartment, which is convenient for the transfer trolley to grasp.

[0036] 3. The angle adjustment and transfer process of the battery can be carried out synchronously, saving the battery replacement time. Brief Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a schematic diagram of the overall structure of the electric vehicle battery swapping system in the embodiment of the present invention;

[0039] Figure 2 It is a schematic diagram of the internal structure of the battery swapping cabinet in the first embodiment of the present invention;

[0040] Figure 3 It is a schematic diagram of the working state of the battery swapping trolley on the track in the embodiment of the present invention;

[0041] Figure 4 It is a schematic diagram of the structure of the parking platform in the first embodiment of the present invention;

[0042] Figure 5 It is a schematic diagram of the working state of the battery carrying frame extending out of the battery compartment in the first embodiment of the present invention;

[0043] Figures 6-8 It is a schematic diagram of the structure of the lifting device in the second embodiment of the present invention;

[0044] Figures 9-12 It is a schematic diagram of the working process of the lifting device in the third embodiment of the present invention;

[0045] Figures 13-16 It is a schematic diagram of the working process of the lifting device in the fourth embodiment of the present invention.

[0046] Description of the Reference Numerals:

[0047] 1, electric vehicle; 2, transfer trolley; 3, battery swapping cabinet; 4, battery compartment; 5, battery carrying frame; 6, track; 7, battery; 8, electric push rod; 9, support member; 10, support plate; 11, driven gear disc; 12, driving gear; 13, gear driving motor; 14, fixing plate; 15, fixing member; 16, moving rod; 17, connecting member; 18, limiting block; 19, parking platform; 20, parking baffle; 21, guardrail; 22, cable pulling motor; 23, steel wire rope; 24, sliding wheel; 25, battery picking and delivering device; 26, charging position. Detailed Embodiments

[0048] The following will further describe in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0049] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 thus should not be construed as limiting the present application.

[0050] The terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "plurality" is two or more.

[0051] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0052] In order to better understand the purpose, structure and function of the present utility model, the following will further describe the present utility model in detail in conjunction with the accompanying drawings.

[0053] Embodiment 1

[0054] Referring to Figure 1 As shown, an electric vehicle 1 battery swapping system provided in this embodiment includes an electric vehicle 1, a transfer trolley 2 and a battery swapping cabinet 3;

[0055] A battery compartment 4 is provided at the bottom of the electric vehicle 1. The battery compartment 4 is provided with a battery carrying frame 5 and a lifting device for driving the battery carrying frame 5 to extend into or out of the interior of the battery compartment 4 in the vertical direction. The battery carrying frame 5 is used to carry the battery 7. A notch for the battery carrying frame 5 to enter and exit is opened at the bottom end of the battery compartment 4, as Figure 5 shown;

[0056] It should be noted that the transfer cart 2 operates between the electric vehicle 1 and the battery swapping cabinet 3, and is used to pick up the battery 7 from the battery carrying frame 5 and transfer the battery 7 to the battery swapping cabinet 3, or pick up the battery 7 from the battery swapping cabinet 3 and transfer the battery 7 to the battery carrying frame 5;

[0057] The transfer cart 2 is provided with a battery angle recognition component and a battery angle adjustment component that are electrically connected to each other;

[0058] It should be noted that the battery angle recognition component is used to recognize and record the relative position and angle between the battery 7 and the transfer cart 2 after the transfer cart 2 picks up the battery 7 from the battery carrying frame 5;

[0059] The battery angle adjustment component is used to adjust the battery 7 to the relative position and angle between the battery 7 and the transfer cart 2 recorded by the battery angle recognition component after the transfer cart 2 picks up the battery 7 from the battery swapping cabinet 3, and is also used to adjust the relative position and angle between the battery 7 and the transfer cart 2 when transferring the battery 7 to the battery swapping cabinet 3 so that the battery 7 meets the position and angle standards for entering the interior of the battery swapping cabinet 3;

[0060] Refer to Figure 2 , the battery swapping cabinet 3 is provided with a battery picking and delivering device 25. The battery picking and delivering device 25 is used to take out the battery 7 in the battery swapping cabinet 3 and transfer the battery 7 to the transfer cart 2, or pick up the battery 7 from the transfer cart 2 and put the battery 7 into the battery swapping cabinet 3. The battery swapping cabinet 3 is provided with two rows of charging positions 26 on the left and right, and the battery picking and delivering device 25 is located between the two rows of charging positions 26 on the left and right.

[0061] Specifically, refer to Figure 3 , for the sake of facilitating the systematic transportation of the transfer cart 2, the battery swapping cabinet 3 is further provided with a track 6. One end of the battery swapping cabinet 3 facing the electric vehicle 1 is provided with a cabinet door. One end of the track 6 passes through the cabinet door and extends into the interior of the battery swapping cabinet 3, and the other end of the track 6 extends to the position below the battery compartment 4 of the electric vehicle 1. The opening size of the cabinet door is adapted to the size of the transfer cart 2. The transfer cart 2 runs on the track 6 and enters and exits the battery swapping cabinet 3 through the cabinet door, enabling the transfer cart 2 to transport the battery 7 inside the battery swapping cabinet 3. When the entire electric vehicle 1 battery swapping system is not operating, the transfer cart 2 can move into the interior of the battery swapping cabinet 3 to avoid damage to the transfer cart 2 caused by external reasons.

[0062] Specifically, refer to Figure 1 , in order to ensure the effective operation of the battery swapping process and ensure that the battery carrying frame 5 has sufficient space for vertical movement and left - right rotation, the electric vehicle 1 battery swapping system further includes a parking platform 19. The front end and the rear end of the parking platform 19 have slopes, which are convenient for the electric vehicle 1 to drive above the parking platform 19 to increase the ground clearance of the chassis of the electric vehicle 1.

[0063] It should be noted that, asFigure 5 As shown, the parking platform 19 specifically refers to two correspondingly arranged single-sided bridge structures.

[0064] The parking platform 19 is provided with a parking baffle 20, a left-right moving device, and a guardrail 21. The parking baffle 20 can be lifted or lowered to limit the parking position of the vehicle on the parking platform 19. The left-right moving device can drive the bridge bodies between the charging positions 23 of the electric vehicles 1 corresponding to the two single-sided bridge structures to move towards or away from each other, so that the space corresponding to the bottom of the battery compartment 4 of the electric vehicle 1 is larger, ensuring that the battery carrying frame 5 can move up and down and rotate left and right smoothly, and preventing the parking platform 19 from affecting the movement of the battery carrying frame 5 when the battery carrying frame 5 moves up and down and rotates left and right.

[0065] Embodiment Two

[0066] This embodiment provides a lifting device.

[0067] As Figures 6-8 shown, the lifting device can adopt the following structure:

[0068] The lifting device includes a cable motor 22, a suspension part, and a steel wire rope 23. The steel wire rope 23 is routed around a plurality of suspension parts fixed around the battery carrying frame 5. The battery carrying frame 5 is lifted by the cable motor 22 winding the steel wire rope 23. The suspension part is composed of several sliding wheels 24 or several hooks or a combination of several sliding wheels 24 and hooks.

[0069] It should be noted that in this embodiment, the attached Figures 6-8 only uses the sliding wheels 24 to form the suspension part, and the specific structural form refers to Figures 6-8 .

[0070] Embodiment Three

[0071] This embodiment provides a second lifting device.

[0072] Specifically, referring to Figures 9-12 shown, the lifting device can adopt the following structure:

[0073] The lifting device includes a lifting component and a support component;

[0074] The lifting component includes an electric push rod 8;

[0075] The support component includes a support member 9 with a hollow structure and an open bottom end and a support disk 10 with a hollow structure;

[0076] The support member 9 is rotatably arranged at the bottom of the electric vehicle 1, and the support disk 10 is arranged at the bottom end of the support member 9; both the support member 9 and the support disk 10 are arranged on the top of the battery compartment 4;

[0077] The battery compartment 4 is also provided with a rotating assembly, which includes a driven gear disk 11 with a hollow structure, a driving gear 12, and a gear driving motor 13;

[0078] The driven gear disk 11 is connected to the bottom end of the support disk 10. The driving gear 12 meshes with the driven gear disk 11. The driving gear 12 is sleeved on the output end of the gear driving motor 13, and the gear driving motor 13 drives the driving gear 12 to rotate;

[0079] The fixed end of the electric push rod 8 is arranged inside the support member 9. The moving end of the electric push rod 8 sequentially passes through the support member 9, the support disk 10, the driven gear disk 11, and the top of the battery compartment 4 and is connected to the battery bearing frame 5 inside the battery compartment 4.

[0080] Embodiment 4

[0081] This embodiment provides a third lifting device.

[0082] Refer to Figures 13-16 As shown, the lifting device can adopt the following structure:

[0083] The lifting device includes a lifting assembly and a support assembly;

[0084] The lifting assembly includes an electric push rod 8;

[0085] The fixed end of the electric push rod 8 is arranged at the bottom of the chassis of the electric vehicle 1. The moving end of the electric push rod 8 extends vertically into the battery compartment 4 and is connected to a fixing plate 14;

[0086] The support assembly includes a fixing member 15, a moving rod 16, and a connecting member 17;

[0087] The fixing member 15 is arranged through the top of the battery compartment 4. The moving rod 16 is slidably arranged inside the fixing member 15. The bottom end of the moving rod 16 is fixedly connected to the connecting member 17, and the connecting member 17 is arranged on the fixing plate 14;

[0088] The top end of the moving rod 16 extends out of the fixing member 15 and is provided with a limiting assembly for preventing the moving rod 16 from disengaging from the fixing member 15.

[0089] The top of the battery bearing frame 5 is also provided with a rotating assembly, which includes a driven gear disk 11, a driving gear 12, and a gear driving motor 13;

[0090] The driven gear disk 11 is rotatably arranged at the bottom end of the fixing plate 14. The driven gear disk 11 is fixedly connected to the top of the battery bearing frame 5. The driving gear 12 meshes with the driven gear disk 11. The driving gear 12 is sleeved on the output end of the gear driving motor 139, and the gear driving motor 13 drives the driving gear 12 to rotate;

[0091] It should be noted that the lifting components in Embodiment 3 and Embodiment 4 can also be devices such as cylinders and electric telescopic rods, as long as they can drive the battery carrier frame 5 to lift and lower.

[0092] It should be noted that the limiting component is the limiting block 18.

[0093] Specifically, the moving rod 16 cooperates with the limiting block 18 to be able to bear the weight of the battery 7 when the electric push rod 8 stops driving the battery 7 to lift and lower, and at the same time also plays a guiding role when the battery 7 moves up and down.

[0094] Generally speaking, the battery 7 is in a cuboid structure, and the battery 7 is basically placed in the battery compartment 4 with its length direction facing forward and along the driving direction of the vehicle. This will result in a smaller number of batteries 7 that can be accommodated in the battery compartment 4. However, the rotating component in Embodiment 2 or Embodiment 3 can drive the entire battery carrier frame 5 to rotate, thereby turning the battery 7 to adjust the direction when the battery 7 enters the battery compartment 4 or is removed from the bottom of the vehicle. The battery 7 is loaded into the battery compartment 4 with its width direction facing forward and along the driving direction of the vehicle to accommodate more batteries 7, thereby increasing the cruising range of the electric vehicle 1. When the battery 7 needs to be replaced, the lifting component in Embodiment 3 or Embodiment 4 drives the battery carrier frame 5 to extend out of the battery compartment 4 in the vertical direction, and then the rotating component changes the direction of the battery carrier frame 5 to change the direction of the battery 7, and cooperates with the transfer trolley 2 to tow the battery 7 out from the front of the vehicle.

[0095] In this article, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, based on the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An electric vehicle battery swapping system, characterized in that, Including electric vehicles, transfer vehicles and battery exchange cabinets; The bottom of the electric vehicle is provided with a battery compartment, the battery compartment is provided with a battery carrying frame and a lifting device for driving the battery carrying frame to extend into or out of the battery compartment in a vertical direction, the battery carrying frame carries batteries, and a notch is provided at the bottom end of the battery compartment for the battery carrying frame to enter and exit; The transfer vehicle runs between the electric vehicle and the battery exchange cabinet; The transfer trolley is provided with a battery angle recognition component and a battery angle adjustment component which are electrically connected to each other; The battery swap cabinet is provided with a battery picking and delivering device, which is used to take out the battery in the battery swap cabinet and transfer the battery to a transfer vehicle, or to take the battery from the transfer vehicle and place the battery in the battery swap cabinet.

2. The electric vehicle battery swapping system according to claim 1, characterized in that, The battery exchange cabinet is also provided with a track. A cabinet door is provided at the end of the battery exchange cabinet facing the electric vehicle. One end of the track passes through the cabinet door and extends into the interior of the battery exchange cabinet, and the other end of the track extends to the position below the battery compartment of the electric vehicle. The opening size of the cabinet door is adapted to the size of the transfer cart.

3. The electric vehicle battery swapping system according to claim 1, characterized in that, Also included is a parking platform, wherein the front and rear ends of the parking platform have slopes; The parking platform also includes a parking barrier and a guardrail, wherein the parking barrier can be raised or lowered to resist or release the wheels of the electric vehicle.

4. The electric vehicle battery swapping system according to claim 1, characterized in that, The lifting device comprises a pull-rope motor, a suspension part and a steel wire rope, wherein the steel wire rope is wired around a plurality of suspension parts fixed around the battery carrying frame, and the steel wire rope is wound around the output end of the pull-rope motor; The hanging part is composed of a plurality of sliding wheels or a plurality of hooks or a combination of a plurality of sliding wheels and hooks.

5. An electric vehicle battery swapping system according to claim 1, characterized in that, The lifting device comprises a lifting assembly and a supporting assembly; The lifting assembly includes an electric push rod; The support assembly includes a support member with an opening at the bottom end of the hollow structure and a support plate of the hollow structure; The support member is rotatably arranged at the bottom of the electric vehicle, and the support plate is arranged at the bottom end of the support member; the support member and the support plate are both arranged at the top of the battery compartment; The battery compartment is also provided with a rotating assembly, which includes a driven gear plate with a hollow structure, a driving gear and a gear drive motor; The driven gear plate is arranged between the battery compartment and the support plate, and is connected to the bottom end of the support plate. The driving gear is meshed with the driven gear plate. The driving gear is sleeved on the output end of the gear drive motor. The gear drive motor drives the driving gear to rotate. The fixed end of the electric push rod is arranged inside the support member, and the movable end of the electric push rod passes through the support member, the support plate, the driven gear plate and the top of the battery compartment in sequence along the vertical direction to be connected to the battery supporting frame.

6. The electric vehicle battery swapping system according to claim 1, wherein, The lifting device comprises a lifting assembly and a supporting assembly; The lifting assembly includes an electric push rod; The fixed end of the electric push rod is arranged at the bottom of the chassis of the electric vehicle, and the movable end of the electric push rod extends into the interior of the battery compartment in a vertical direction and is connected to a fixing plate; The battery compartment has batteries installed inside, and a notch is provided at the bottom of the battery compartment for the batteries to enter and exit; The support assembly includes a fixing member, a moving rod and a connecting member; The fixing member is disposed through the top of the battery compartment, the moving rod is slidably disposed inside the fixing member, the bottom end of the moving rod is fixedly connected to the connecting member, and the connecting member is disposed on the fixing plate; The top end of the moving rod extends out of the fixing member and is provided with a limiting component, and the limiting component is used to prevent the moving rod from disengaging from the fixing member; A rotating component is further disposed on the top of the battery carrying frame, and the rotating component includes a driven gear disc, a driving gear and a gear driving motor; The driven gear disc is rotatably disposed at the bottom end of the fixing plate, the driven gear disc is fixedly connected to the top of the battery carrying frame, the driving gear is engaged with the driven gear disc, the driving gear is sleeved on the output end of the gear driving motor, and the gear driving motor drives the driving gear to rotate.

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