Driving device

Abstract

The utility model relates to the field of motor driving structures, and discloses a driving device comprising a first gear and a second gear which are coaxially arranged and fixedly connected; a first mounting hole is formed in the first gear; the device comprises a turntable, a driving shaft, a mounting shaft and a supporting shaft, wherein the driving shaft is positioned on one side of the turntable and is fixedly connected with the turntable; the supporting shaft is located on the other side of the rotary disc and fixedly connected with the rotary disc. The supporting shaft is rotationally installed in the first installation hole. The mounting shaft is positioned on the other side of the turntable and is fixedly connected with the turntable; and the planetary gear set is rotationally mounted on the mounting shaft, and the planetary gear set is engaged between the inner gear ring and the first gear. The supporting shaft is arranged on the rotating disc, additional radial supporting points are provided for the rotating disc and related parts on the rotating disc, the rotating disc can obtain more stable radial constraint in the rotating process, and the phenomenon that the planet wheel deviates slightly due to external force such as treading impact is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pedal drive, especially a kind of driving device. BACKGROUND

[0002] As the key component of improving the passability and convenience of vehicle, the driving structure of body side electric pedal needs to realize large torque output in limited space, while ensuring the reliability of frequent extension / retraction action. Planetary gear system becomes the core component of such driving device due to its compact structure and large transmission ratio, which converts high speed of motor into low speed and large torque required by pedal through the meshing of sun gear, planetary gear and inner ring gear.

[0003] However, the conventional design usually adopts single-sided installation shaft to support planetary gear set, which needs to bear the dual functions of power transmission and radial support. But when the pedal bears the impact of stepping, the planetary gear without axial constraint may produce slight deviation, which leads to the fluctuation of meshing center distance of sun gear, inner ring gear and planetary gear, thereby causing high-frequency impact vibration. Not only it is easy to cause the aggravation of tooth surface fatigue wear, but also the vibration may be transmitted to the pedal surface through structure, forming perceptible tremor, which seriously affects user experience. SUMMARY

[0004] The utility model provides a kind of driving device to solve the problem of lacking effective radial support of existing driving structure.

[0005] The driving device provided by the present application comprises a first gear and a second gear, which are coaxially arranged and fixedly connected;A first mounting hole is formed in the first gear;A turntable, a drive shaft, a mounting shaft and a support shaft are arranged, wherein the drive shaft is located on one side of the turntable and fixedly connected with the turntable;The support shaft is located on the other side of the turntable and fixedly connected with the turntable, and the support shaft is rotatably installed in the first mounting hole;The mounting shaft is located on the other side of the turntable and fixedly connected with the turntable;An inner ring gear and a planetary gear set are arranged, wherein the planetary gear set is rotatably installed on the mounting shaft, and the planetary gear set is meshed between the inner ring gear and the first gear.

[0006] According to the technical means, the driving device is used for connecting and driving the electric pedal of the vehicle, and it is noted that the first gear and the second gear can be installed on the vehicle body and the relative positions are fixed. Since the support shaft is arranged on the rotating disc and is rotatably installed in the first mounting hole, an additional radial support point is provided for the rotating disc and the related components thereon (i.e., the rotating disc and the related components thereon are supported on the vehicle body). Compared with the traditional single-side installation shaft supporting planetary gear set mode (i.e., the rotating disc and the related components thereon are supported on the planetary gear set), the support structure of the utility model makes the rotating disc obtain more stable radial constraint in the rotating process, effectively reduces the small offset phenomenon of the planetary gear caused by the impact of external forces such as stepping.

[0007] Since the planetary gear offset is effectively inhibited, the meshing center distance between the planetary gear set, the sun gear (the first gear can be regarded as the sun gear) and the inner tooth ring can remain relatively stable, avoiding high-frequency impact vibration caused by the fluctuation of the meshing center distance, thereby reducing the risk of tooth surface fatigue wear and prolonging the service life of each gear. At the same time, the perceptible vibration phenomenon on the surface of the electric pedal is also avoided, providing the user with a more stable and comfortable pedal use experience.

[0008] Further, the planetary gear set includes two or more sub-planetary gears, and the number of the mounting shafts is two or more, and each of the sub-planetary gears is rotatably installed on one of the mounting shafts.

[0009] According to the above technical means, the plurality of sub-planetary gears jointly undertake the power transmission task, compared with the single planetary gear structure, the load can be more evenly distributed to each sub-planetary gear, so that the load borne by each sub-planetary gear is relatively reduced, the risk of damage of a single gear due to overload is reduced, thereby improving the carrying capacity and reliability of the entire transmission system.

[0010] At the same time, when the electric pedal bears the impact of external forces such as stepping, the planetary gear set composed of multiple sub-planetary gears can better resist the interference of external forces. Even if a certain sub-planetary gear is subjected to a large instantaneous impact force, the other sub-planetary gears can still maintain normal meshing transmission, maintaining the stable operation of the entire transmission system. This redundant design effectively avoids the situation that the entire driving device fails due to the failure of a single gear.

[0011] Further, the second gear is formed with a second mounting hole, the second mounting hole is coaxially arranged with the first mounting hole, the support shaft extends into the second mounting hole and is rotatably connected with the second mounting hole.

[0012] According to the technical means, the first mounting hole and the second mounting hole are communicated, the effective supporting length of the supporting shaft is increased, a longer supporting span is formed on the side of the rotating disc, the bending deformation caused by the weight, the torque transmitted by the driving shaft and the external force impact in the rotating process can be effectively resisted, and the rotating disc can rotate stably and steadily.

[0013] Further, the driving shaft is formed with a worm, and the worm is engaged with the second gear.

[0014] According to the technical means, the worm drive has the characteristics of compact structure, the worm drive does not need too many intermediate transmission components, the worm and the second gear can realize a larger transmission ratio in a smaller space, and thus the overall volume and weight of the driving device are reduced.

[0015] Further, the driving member is connected with the driving shaft, and the driving member can drive the driving shaft to rotate.

[0016] According to the technical means, the driving member serves as a connecting bridge of the power source and the driving shaft, can convert external input power such as electric energy and hydraulic energy into mechanical energy and transmit the mechanical energy to the driving shaft, and through reasonable connection mode and transmission design, the power can be efficiently and stably transmitted from the driving member to the driving shaft, so that the driving shaft rotates at a set speed and torque.

[0017] Further, the housing and the cover are spliced, a cavity is formed between the housing and the cover, and the first gear, the second gear, the rotating disc, the mounting shaft, the supporting shaft, the inner ring gear, the planetary gear set and the worm are arranged in the cavity.

[0018] According to the technical means, the housing and the cover are fixed on the vehicle body, the closed cavity formed by the housing and the cover provides a solid physical barrier for the internal precise gear transmission components, guarantees the integrity and stability of the internal structure of the driving device, and reduces the failure and maintenance cost caused by external impact.

[0019] Further, the cover is formed with a first clamping member, the inner ring gear is formed with a second clamping member, the first clamping member and the second clamping member can be clamped or unclamped, so that the inner ring gear can be clamped on the cover or removed from the cover.

[0020] According to the technical means, the first clamping piece and the second clamping piece are clamped, the inner gear ring is aligned with the corresponding position on the cover body, a certain force is applied to clamp the two, and installation is completed.

[0021] Further, the cover body further forms a through hole, and the driving shaft passes through the through hole and is connected with the rotating disc in the cavity.

[0022] According to the technical means, the through hole provides a stable support and fixing point for the driving shaft, so that the driving shaft can maintain a stable state during operation, reduces shaking and vibration of the driving shaft, and improves overall structural stability of the equipment.

[0023] Further, the shell forms a groove, the groove is coaxially arranged with the second mounting hole, the support shaft extends into the groove, and the support shaft is rotationally matched with the groove.

[0024] According to the technical means, the groove provides an additional support point for the support shaft, cooperates with the second mounting hole, forms a more stable support structure, and when the support shaft bears radial force and axial force from the pedal, the groove can share part of the load, reduces stress concentration of the support shaft at the second mounting hole, improves the carrying capacity of the support shaft, reduces the risk of bending and breaking of the support shaft due to excessive force, and ensures long-term stable operation of the driving device.

[0025] Further, the third mounting hole is formed in each of the sub-planetary gears, and the mounting shaft extends into the third mounting hole, so that each of the sub-planetary gears is rotationally mounted on the mounting shaft.

[0026] According to the technical means, the third mounting hole is directly formed in the sub-planetary gear, the mounting shaft extends into the hole to realize rotational mounting, avoids the use of complex additional connection structures or auxiliary components, and reduces the assembly steps.

[0027] The utility model realizes the beneficial effect that:

[0028] 1. The driving device is used for connecting and driving the electric pedal of the vehicle, and it is noted that the first gear and the second gear in the utility model can be installed on the vehicle body, and the relative positions are fixed. Since the utility model sets the support shaft on the rotating disc, and rotates and installs it in the first mounting hole, it provides an additional radial support point for the rotating disc and the related components thereon (that is, the rotating disc and the related components thereon are supported on the vehicle body). Compared with the traditional single-side mounting shaft supporting planetary gear set mode (that is, the rotating disc and the related components thereon are supported on the planetary gear set), the support structure of the utility model enables the rotating disc to obtain more stable radial constraint during rotation, effectively reducing the small offset phenomenon of the planetary gear caused by external forces such as stepping impact.

[0029] 2. Since the planetary gear offset is effectively inhibited, the meshing center distance between the planetary gear set, the sun gear (the first gear can be regarded as the sun gear) and the inner tooth ring can remain relatively stable, avoiding high-frequency impact vibration caused by meshing center distance fluctuation, thereby reducing the risk of tooth surface fatigue wear and prolonging the service life of each gear; at the same time, the perceptible vibration phenomenon on the surface of the electric pedal is also avoided, providing users with a more stable and comfortable pedal use experience. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the overall structure explosion schematic view of the utility model;

[0031] Figure 2 It is the overall structure assembly schematic view of the utility model;

[0032] Figure 3 It is the transmission structure schematic view of the utility model;

[0033] Figure 4 It is the cover structure schematic view of the utility model;

[0034] Figure 5 It is the shell structure schematic view of the utility model;

[0035] Figure 6 It is the structure schematic view of the rotating disc, the driving shaft, the mounting shaft and the support shaft of the utility model.

[0036] REFERENCE SIGNS:

[0037] 1. First gear; 1-1, first mounting hole;

[0038] 2. Second gear; 2-1, second mounting hole;

[0039] 3. Rotating disc;

[0040] 4. Driving shaft;

[0041] 5. Mounting shaft;

[0042] 6, support shaft;

[0043] 7, inner gear ring; 7-1, second clamping piece;

[0044] 8, planetary gear set; 8-1, sub-planetary gear; 8-1-1, third mounting hole;

[0045] 9, driving shaft; 9-1, worm;

[0046] 10, driving piece;

[0047] 11, housing; 11-1, groove;

[0048] 12, cover; 12-1, first clamping piece; 12-2, through hole.

[0049] The drawings are only used for illustrative description, and should not be understood as limiting the patent; in order to better illustrate the embodiments, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted; the same or similar reference numerals correspond to the same or similar components; the terms used to describe the positional relationship in the drawings are only used for illustrative description, and should not be understood as limiting the patent. Specific embodiments

[0050] It should be noted that the embodiments and technical features in the present application can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as an explanation and description of the purpose of the present application, and should not be regarded as an improper limitation of the present application.

[0051] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the specific technical scheme of the present application will be further described in detail below in combination with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0052] In the embodiments of the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through intermediate medium.

[0053] In the embodiments of the present application, the terms "comprising", "containing" or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements not only includes those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0054] The technical solutions of the present application will be described in detail below with reference to specific drawings.

[0055] As shown in Figure 1 and Figure 6 A driving device, comprising: a first gear 1 and a second gear 2, the first gear 1 and the second gear 2 are coaxially arranged and fixedly connected; a first mounting hole 1-1 is formed on the first gear 1; a rotating disc 3, a driving shaft 4, a mounting shaft 5 and a supporting shaft 6, the driving shaft 4 is located on one side of the rotating disc 3 and is fixedly connected with the rotating disc 3; the supporting shaft 6 is located on the other side of the rotating disc 3 and is fixedly connected with the rotating disc 3, and the supporting shaft 6 is rotatably installed in the first mounting hole 1-1; the mounting shaft 5 is located on the other side of the rotating disc 3 and is fixedly connected with the rotating disc 3; an inner gear ring 7 and a planetary gear set 8, the planetary gear set 8 is rotatably installed on the mounting shaft 5, and the planetary gear set 8 is engaged between the inner gear ring 7 and the first gear 1.

[0056] The specific operation process of the driving device in the present embodiment is as follows:

[0057] 1. Initial state: the first gear 1 and the second gear 2 are rotatably installed on the vehicle body, and the position is relatively fixed. The rotating disc 3 is in the initial static position, and each planet wheel in the planetary gear set 8 is uniformly distributed on the mounting shaft 5 according to the design requirement, and keeps the meshing state with the first gear 1 (as the sun gear) and the inner gear ring 7. The supporting shaft 6 is stably rotatably installed in the first mounting hole 1-1, providing radial support for the rotating disc 3; the driving shaft 4 is fixedly connected with the rotating disc 3, but at this time the power device is not started, and the driving shaft 4 is in a static state. The vehicle electric pedal is in the retracted state, closely contacting the side of the vehicle body, providing better aerodynamic performance and passability for the vehicle during driving.

[0058] 2. Drive stage (pedal extension): When the driver operates the relevant control button or the vehicle system sends a signal according to the preset conditions (such as the vehicle door being opened), the power device starts to work. The power generated by the power device directly drives the second gear 2 to rotate, at the same time driving the coaxially connected first gear 1 (sun gear) to rotate. The rotation of the first gear 1 drives the sub-planetary gear 8-1 in the planetary gear set 8 to move. The sub-planetary gear 8-1 rotates around its own axis and revolves around the axis of the first gear 1. Since the sub-planetary gear 8-1 also maintains a meshing relationship with the inner ring gear 7, the planetary gear set 8 converts the high-speed power input by the first gear 1 into low-speed and large-torque power.

[0059] The low-speed and large-torque output of the planetary gear set 8 is transmitted to the rotating disc 3 through the mounting shaft 5, causing the rotating disc 3 to start rotating. Since the support shaft 6 stably rotates in the first mounting hole 1-1, it provides reliable radial support for the rotating disc 3, ensuring that the rotating disc 3 can rotate smoothly and smoothly.

[0060] The rotation of the rotating disc 3 drives the drive shaft 4 fixed thereto to rotate synchronously. The drive shaft 4 is connected to the vehicle electric pedal through relevant mechanical structures (such as a connecting rod mechanism, not shown in detail), which pushes the pedal to slowly extend from the side of the vehicle body until it reaches the preset extension position, providing convenience for passengers to get on and off the vehicle.

[0061] 3. Stable running stage: After the electric pedal is extended to the preset position, the power device can maintain a certain output torque through the control system, so that the pedal is stably extended. At this time, the planetary gear set 8 continuously and stably transmits power under the meshing constraint of the first gear 1 and the inner ring gear 7, ensuring that the pedal will not be easily retracted due to external force (such as passenger stepping). When the passenger steps on the pedal, the pedal will be subjected to a downward force. Since the support shaft 6 provides good radial support for the rotating disc 3, the planetary gear set 8 can maintain a stable meshing relationship and effectively resist the stepping impact force, avoiding the slight deviation of the planetary gear, thereby ensuring the stability and reliability of the pedal.

[0062] Retraction Phase (Pedal Retraction): After passengers have completed their boarding and alighting, the driver operates the control button again, or the vehicle system sends a signal based on preset conditions (such as door closure), initiating a reverse rotation of the power unit. This reverse rotation drives the first gear 1 to rotate in the opposite direction, which in turn drives the planetary gears in the planetary gear set 8 to move in the opposite direction. The planetary gear set 8 converts the reverse rotational power of the first gear 1 into a low-speed, high-torque output that retracts the pedal. This low-speed, high-torque output from the planetary gear set 8 is transmitted to the turntable 3 via the mounting shaft 5, causing the turntable 3 to rotate in the opposite direction. The support shaft 6 continues to provide radial support to the turntable 3, ensuring its smooth rotation. The reverse rotation of the turntable 3 drives the drive shaft 4, which is fixed to it, to rotate synchronously in the opposite direction. Under the action of the relevant mechanical structures, the vehicle's electric pedal slowly retracts until it is flush against the side of the vehicle body, returning to its initial state and preparing for vehicle operation.

[0063] In this embodiment, the drive device is used to connect to and drive the vehicle's electric pedal. It should be noted that the first gear 1 and the second gear 2 in this embodiment can be mounted on the vehicle body, and their relative positions are fixed. Because this embodiment provides a support shaft 6 on the turntable 3 and rotatably mounts it within the first mounting hole 1-1, it provides additional radial support points for the turntable 3 and its related components (i.e., the turntable 3 and its related components are supported on the vehicle body). Compared to the traditional method of supporting the planetary gear set with a single-sided mounting shaft (i.e., the turntable 3 and its related components are supported on the planetary gear set), the support structure of this embodiment allows the turntable 3 to obtain more stable radial constraint during rotation, effectively reducing the slight displacement of the planetary gears caused by external forces such as foot impact.

[0064] Because the planetary gear offset is effectively suppressed, the meshing center distance between the planetary gear set 8 and the sun gear (the first gear (1) can be regarded as the sun gear) and the internal gear ring 7 can remain relatively stable, avoiding high-frequency impact vibration caused by the fluctuation of the meshing center distance, thereby reducing the risk of tooth surface fatigue wear and extending the service life of each gear; at the same time, it also avoids the perceptible vibration phenomenon on the surface of the electric pedal, providing users with a more stable and comfortable pedal experience.

[0065] like Figure 1 and Figure 3 As shown, the planetary gear set 8 includes two or more sub-planetary gears 8-1, and the number of mounting shafts 5 is two or more, with each sub-planetary gear 8-1 rotatably mounted on one of the mounting shafts 5.

[0066] Multiple sub-planetary gears 8-1 share the power transmission task. Compared with a single planetary gear structure, the load can be distributed more evenly to each sub-planetary gear, which reduces the load on each sub-planetary gear 8-1 and reduces the risk of damage to a single gear due to overload, thereby improving the load-bearing capacity and reliability of the entire transmission system.

[0067] At the same time, when the electric pedal bears the impact of external forces such as stepping, the planetary gear set 8 composed of multiple sub-planetary gears 8-1 can better resist the interference of external forces. Even if a certain sub-planetary gear 8-1 is subjected to a momentary greater impact force, the other sub-planetary gears 8-1 can still maintain normal meshing transmission, maintaining the stable operation of the entire transmission system. This redundant design effectively avoids the situation where the entire drive device fails due to a single gear failure.

[0068] As shown in Figure 1 , the second gear 2 is formed with a second mounting hole 2-1, the second mounting hole 2-1 is coaxially arranged with the first mounting hole 1-1, the support shaft 6 extends into the second mounting hole 2-1, and is in rotational cooperation with the second mounting hole 2-1.

[0069] In this embodiment, the first mounting hole 1-1 and the second mounting hole 2-1 are through, so that the effective support length of the support shaft 6 is increased, which is equivalent to forming a longer support span on the side of the rotating disc 3, which can effectively resist the bending deformation caused by its own weight, the torque transmitted by the drive shaft 4 and the external force impact that may be received during rotation, and ensure that the rotating disc 3 rotates smoothly and stably.

[0070] As shown in Figure 1 and Figure 3 , it also includes a driving shaft 9, the driving shaft 9 is formed with a worm 9-1, and the worm 9-1 is engaged with the second gear 2.

[0071] The worm drive has the characteristics of compact structure, and does not need too many intermediate transmission parts. The worm 9-1 and the second gear 2 can realize a larger transmission ratio in a smaller space, thereby reducing the overall volume and weight of the drive device.

[0072] As shown in Figures 1-3 , Figure 5 , it also includes a driving member 10, the driving member 10 is connected with the driving shaft 9, and the driving member 10 can drive the driving shaft 9 to rotate.

[0073] The driving member 10 serves as a connection bridge between the power source and the driving shaft 9, and can convert the external input power such as electric energy and hydraulic energy into mechanical energy and transmit it to the driving shaft 9. Through reasonable connection mode and transmission design, it is ensured that the power can be efficiently and stably transmitted from the driving member 10 to the driving shaft 9, so that the driving shaft 9 rotates at a set speed and torque.

[0074] In this embodiment, according to different application scenarios and design requirements, the driving member 10 can adopt various forms, such as a motor, a hydraulic motor, etc. The motor has the advantages of high efficiency, energy saving, fast response speed, etc., and is suitable for occasions with high requirements for control accuracy and speed; the hydraulic motor has the characteristics of large output torque and strong overload capacity, and is suitable for working in heavy load or harsh environment.

[0075] As shown in Figure 1 , Figure 4 and Figure 5 , the housing 11 and the cover 12 are spliced, and a cavity is formed between the housing 11 and the cover 12. The first gear 1, the second gear 2, the rotating disc 3, the mounting shaft 5, the support shaft 6, the inner ring gear 7, the planetary gear set 8 and the worm 9-1 are arranged in the cavity.

[0076] In this embodiment, the housing 11 and the cover 12 are fixed on the vehicle body, and the closed cavity composed of the housing 11 and the cover 12 provides a solid physical barrier for the internal precise gear transmission components, ensuring the integrity and stability of the internal structure of the driving device, reducing the failure and maintenance cost caused by external impact.

[0077] As shown in Figure 4 , the cover 12 is formed with a first clamping member 12-1, and the inner ring gear 7 is formed with a second clamping member 7-1. The first clamping member 12-1 and the second clamping member 7-1 can be clamped or unclamped, so that the inner ring gear 7 can be clamped on the cover 12 or removed from the cover 12.

[0078] In this embodiment, the first clamping member 12-1 and the second clamping member 7-1 are clamped, which only needs to align the inner ring gear 7 with the corresponding position on the cover 12, and then apply a certain force to clamp them to complete the installation. The clamping structure can provide a larger connection force to a certain extent, improve the reliability of the connection between the inner ring gear 7 and the cover 12, reduce the risk of loosening and falling of the inner ring gear 7 during work, and ensure the normal operation of the driving device.

[0079] In this embodiment, the first clamping member 12-1 is a bayonet, and the second clamping member 7-1 is a clamping block. The cooperation form of the bayonet (first clamping member 12-1) and the clamping block (second clamping member 7-1) has a clear shape matching relationship. The inner wall profile of the bayonet and the outer shape profile of the clamping block match each other. When the clamping block is inserted into the bayonet, the edge of the bayonet can guide and position the clamping block, so that the clamping block can quickly and accurately enter the correct position in the bayonet.

[0080] The clamping structure of the clamping hole and the clamping block forms a connection mode similar to mortise and tenon, and the two are constrained in multiple directions. The side wall of the clamping hole can limit the movement of the clamping block in the radial and tangential directions, and the top and bottom of the clamping block are in contact with the corresponding parts of the clamping hole, preventing the clamping block from moving in the axial direction. This multi-directional constraint makes the connection between the inner gear ring 7 and the cover 12 more secure, capable of withstanding greater torque and vibration, ensuring the stability and reliability of the drive device during operation.

[0081] As shown in Figure 1 and Figure 2 , the cover 12 also has a through hole 12-2, and the drive shaft 4 passes through the through hole 12-2 and is connected with the turntable 3 in the cavity.

[0082] The through hole 12-2 provides a stable support and fixing point for the drive shaft 4, so that the drive shaft 4 can maintain a stable state during operation, reducing the shaking and vibration of the drive shaft 4 and improving the overall structural stability of the equipment.

[0083] As shown in Figure 1 and Figure 5 , the shell 11 has a recess 11-1, and the recess 11-1 is coaxially arranged with the second mounting hole 2-1. The support shaft 6 extends into the recess 11-1 and rotates with the recess 11-1.

[0084] The recess 11-1 provides an additional support point for the support shaft 6, which works together with the second mounting hole 2-1 to form a more stable support structure. When the support shaft 6 bears the radial force and axial force from the pedal, the recess 11-1 can share part of the load, reducing the stress concentration of the support shaft 6 at the second mounting hole 2-1, improving the carrying capacity of the support shaft 6, reducing the risk of bending and breaking of the support shaft 6 due to excessive force, and ensuring the long-term stable operation of the drive device.

[0085] As shown in Figure 1 and Figure 3 , each sub-planetary gear 8-1 has a third mounting hole 8-1-1, and each mounting shaft 5 extends into the third mounting hole 8-1-1 to rotate and install each sub-planetary gear 8-1 on each mounting shaft 5.

[0086] The third mounting hole 8-1-1 is directly formed on the sub-planetary gear 8-1, and the mounting shaft 5 extends into the hole to realize rotation and installation, avoiding the use of complex additional connection structures or auxiliary components, and reducing the assembly steps.

[0087] The above sequence numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments. The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A driving device, characterized in that, include: A first gear (1) and a second gear (2) are coaxially arranged and fixedly connected; a first mounting hole (1-1) is formed on the first gear (1); The turntable (3), drive shaft (4), mounting shaft (5), and support shaft (6) are provided. The drive shaft (4) is located on one side of the turntable (3) and is fixedly connected to the turntable (3). The support shaft (6) is located on the other side of the turntable (3) and is fixedly connected to the turntable (3). The support shaft (6) is rotatably installed in the first mounting hole (1-1). The mounting shaft (5) is located on the other side of the turntable (3) and is fixedly connected to the turntable (3). An internal gear ring (7) and a planetary gear set (8) are rotatably mounted on the mounting shaft (5) and the planetary gear set (8) meshes between the internal gear ring (7) and the first gear (1).

2. The driving device according to claim 1, characterized in that, The planetary gear set (8) includes two or more sub-planetary gears (8-1), and the number of mounting shafts (5) is two or more, with each sub-planetary gear (8-1) rotatably mounted on one of the mounting shafts (5).

3. The driving device according to claim 1, characterized in that, The second gear (2) has a second mounting hole (2-1) formed on it. The second mounting hole (2-1) is coaxially arranged with the first mounting hole (1-1). The support shaft (6) extends into the second mounting hole (2-1) and rotates with the second mounting hole (2-1).

4. A driving device according to claim 3, characterized in that, It also includes a drive shaft (9), on which a worm (9-1) is formed, and the worm (9-1) meshes with the second gear (2).

5. A driving device according to claim 4, characterized in that, It also includes a drive unit (10), which is connected to the drive shaft (9) and can drive the drive shaft (9) to rotate.

6. A driving device according to claim 4, characterized in that, It also includes a housing (11) and a cover (12), the housing (11) and the cover (12) being joined together, and a cavity being formed between the housing (11) and the cover (12). The first gear (1), the second gear (2), the turntable (3), the mounting shaft (5), the support shaft (6), the internal gear ring (7), the planetary gear set (8) and the worm (9-1) are disposed in the cavity.

7. A driving device according to claim 6, characterized in that, A first snap-fit ​​member (12-1) is formed on the cover (12), and a second snap-fit ​​member (7-1) is formed on the inner toothed ring (7). The first snap-fit ​​member (12-1) and the second snap-fit ​​member (7-1) can snap into or unsnap with each other so that the inner toothed ring (7) can snap into or be removed from the cover (12).

8. A driving device according to claim 7, characterized in that, A through hole (12-2) is also formed on the cover (12), and the drive shaft (4) passes through the through hole (12-2) and is connected to the turntable (3) in the cavity.

9. A driving device according to claim 6, characterized in that, A groove (11-1) is formed on the housing (11), the groove (11-1) is coaxially arranged with the second mounting hole (2-1), and the support shaft (6) extends into the groove (11-1) and is rotatably engaged with the groove (11-1).

10. A driving device according to claim 2, characterized in that, Each of the sub-planetary gears (8-1) has a third mounting hole (8-1-1) formed therein, and each of the mounting shafts (5) extends into the third mounting hole (8-1-1) so that each of the sub-planetary gears (8-1) is rotatably mounted on each of the mounting shafts (5).

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