Electric side step drive device and vehicle

Abstract

The present invention provides an electric side step driving device and a vehicle. The electric side step driving device of the present invention includes a mounting bracket connected to the vehicle body, a rotary driving part provided on the mounting bracket, and a crank connecting rod with one end hinged to the mounting bracket; an upper connecting plate is connected to the driving shaft of the rotary driving part, and a front connecting plate is provided at the other end of the crank connecting rod; one end of the front connecting plate is slidably inserted into the crank connecting rod, and the other end is hinged with a pedal connecting bracket; one end of the upper connecting plate is fixedly connected to the driving shaft, and the other end is hinged to the front connecting plate. The electric side step driving device of the present invention can realize the deployment or retraction of the pedal through the rotation of the crank connecting rod, the upper connecting plate, and the front connecting plate, as well as the synchronous expansion and contraction of the front connecting plate, and can increase the pedal deployment stroke when the electric side step is deployed, and does not affect the cooperation between the pedal and the vehicle body skirt when the electric side step is retracted, thereby improving the use effect of the electric pedal.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle parts, and particularly to an electric side step driving device. The present invention also relates to a vehicle equipped with the above electric side step driving device. Background Art

[0002] An electric side step is an automatically retractable vehicle pedal that provides convenient service for getting on and off high-chassis vehicles (mainly commercial vehicles, SUVs, and off-road vehicles). It mainly consists of a drive system, a controller, a linkage mechanism, and a pedal body. The pedal body is generally installed on the vehicle chassis through a linkage mechanism. When a passenger needs to get on or off the vehicle, the controller automatically controls the telescoping of the pedal by sensing the door state and other signals of the whole vehicle, achieving the comfort and safety of the step. Since the electric pedal is mainly used for high-chassis vehicles, many customers have high requirements for aspects such as the deployment stroke of the electric side step and the fit between the electric side step and the body skirt when the electric side step is retracted.

[0003] The existing electric side step driving devices generally use a linkage mechanism as the telescoping moving part, horizontally extending the pedal outward along an obliquely downward direction from the vehicle body, with a relatively small deployment stroke, resulting in the still relatively high pedal after deployment, which is not convenient for passengers to use. In addition, the existing pedal driving device has a relatively large volume after retraction, occupying the chassis height, affecting the fit between the pedal and the body skirt, and reducing the passing performance originally possessed by the high chassis of the vehicle. These will all affect the use effect of the electric pedal. Summary of the Invention

[0004] In view of this, the present invention aims to provide an electric side step driving device that can increase the deployment stroke of the pedal when the electric side step is deployed and does not affect the fit between the pedal and the body skirt when the electric side step is retracted, thereby improving the use effect of the electric pedal.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] An electric side step driving device includes a mounting bracket for connecting to the vehicle body, a rotary drive part provided on the mounting bracket, and a crank-link whose one end is hinged to the mounting bracket.

[0007] An upper connecting plate is connected to the drive shaft of the rotary drive part, and a front connecting plate is provided at the other end of the crank-link.

[0008] One end of the front connecting plate is slidably inserted into the crank-link, a pedal connecting bracket is hinged to the other end of the front connecting plate, one end of the upper connecting plate is fixedly connected to the drive shaft, and the other end of the upper connecting plate is hinged to the front connecting plate.

[0009] Furthermore, one end of the upper connecting plate connected to the driving shaft is sleeved on the driving shaft, and the upper connecting plate is fixedly connected to the driving shaft through a fixing mechanism. Further, the fixing mechanism includes a groove provided on the driving shaft, a fixing hole provided on the upper connecting plate, and a fixing block fixed in the fixing hole, and one end of the fixing block is located in the groove.

[0010] Furthermore, the crank-link mechanism is hinged to the mounting bracket through a first pin shaft, and one end of the first pin shaft is press-fitted into the mounting bracket, and the other end of the first pin shaft is rotatably connected to the crank-link mechanism through a first bushing; and / or, the upper connecting plate is hinged to the front connecting plate through a second pin shaft, and one end of the second pin shaft is press-fitted into the upper connecting plate, and the other end of the second pin shaft is rotatably connected to the front connecting plate through a second bushing.

[0011] Furthermore, a limiting mechanism is provided between the mounting bracket and the crank-link mechanism, and the limiting mechanism is used to limit the rotation of the crank-link mechanism at the end of the electric side step deployment and at the end of the electric side step retraction.

[0012] Furthermore, the limiting mechanism includes a first limiting block and a second limiting block provided on the mounting bracket; at the end of the electric side step deployment, one side of the crank-link mechanism abuts against the first limiting block, and at the end of the electric side step retraction, the other side of the crank-link mechanism abuts against the second limiting block.

[0013] Furthermore, the crank-link mechanism is arc-shaped, and a chute is formed at one end of the crank-link mechanism where the front connecting plate is provided. The chute is located on the outer peripheral wall of the crank-link mechanism, and one end of the front connecting plate is slidably inserted into the chute.

[0014] Furthermore, a deformable protective cover is provided between the front connecting plate and the crank-link mechanism, and the part of the front connecting plate slidably connected to the crank-link mechanism is located inside the protective cover.

[0015] Furthermore, the front connecting plate has a connecting plate main body and a slider connected to one end of the connecting plate main body, and the cross section of the slider is smaller than that of the connecting plate main body; the slider is slidably inserted on the crank-link mechanism, the connecting plate main body is hinged to the pedal connecting bracket, and the protective cover is sleeved outside the slider and connected between the crank-link mechanism and the connecting plate main body.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The electric side step driving device described in the present invention, under the drive of the rotary drive part, can realize the deployment or retraction of the step through the rotation of the crank connecting rod, the upper connecting plate, the front connecting plate, and the synchronous telescopic movement of the front connecting plate. Moreover, by utilizing the sliding telescopic movement of the front connecting plate, the deployment stroke of the step can be increased when the electric side step is deployed, and the cooperation between the step and the body skirt can be not affected when the electric side step is retracted, thereby improving the use effect of the electric step.

[0018] In addition, through the setting of the fixing mechanism, it is beneficial for the torque of the rotary drive part to be effectively transmitted to the upper connecting plate through the drive shaft, thereby driving the rotation of the crank connecting rod and the front connecting plate. Specifically, through the setting of the groove, the fixing hole, and the fixing block 32 fixed between the two, the upper connecting plate can be firmly connected to the drive shaft. The crank connecting rod is hinged to the mounting bracket through the first pin shaft, which can ensure that the crank connecting rod rotates around the first pin shaft, and the upper connecting plate is hinged to the front connecting plate through the second pin shaft, which can enable the upper connecting plate to drive the front connecting plate to rotate around the second pin shaft, with reliable work and convenient disassembly.

[0019] Through the setting of the limiting mechanism, when the deployment and recovery processes of the electric side step are completed, it can play a limiting role on the step, avoiding damage to the step and the body caused by the driving motor still running when reaching the deployment or recovery position, resulting in collision between the step and the body, and ensuring that the step stops in time when the deployment and recovery reach the set position. Specifically, by setting the first limiting block and the second limiting block to respectively limit the deployment and closing processes of the electric side step, it is beneficial for adjusting the limiting positions of the deployment and closing respectively.

[0020] In addition, the crank connecting rod is set to be arc-shaped, which is beneficial for the crank connecting rod to avoid the drive shaft during the rotation process, enabling it to obtain a larger rotation angle. The chute provided on the outer peripheral wall of the crank connecting rod plays a positioning role, enabling one end of the front connecting plate to be slidably inserted into the crank connecting rod and preventing it from slipping out when sliding relative to the crank connecting rod. Through the setting of the dust cover, dust protection is implemented for the contact part between the chute and one end of the front connecting plate, avoiding dust entry and ensuring the stable operation of the relative sliding and telescopic movement between the front connecting plate and the crank connecting rod.

[0021] By setting the slider and making it slidably inserted into the crank connecting rod, it is convenient for the protective cover to be sleeved outside the slider. Compared with sleeving the protective cover on the connecting plate body with a cross-section larger than that of the slider, sleeving the protective cover outside the slider is beneficial for reducing the cross-sectional area of the protective cover, thereby reducing the cost of the protective cover. At the same time, the protective cover can be abutted and set on the end face of the connecting plate body around the root of the slider, which is beneficial for the fixation of the protective cover. The connecting plate body is hinged to the step connecting bracket, with reliable work and convenient disassembly.

[0022] Another object of the present invention is to provide a vehicle, on which an electric side step is provided, and the electric side step adopts the electric side step driving device as described above.

[0023] The vehicle and the above-mentioned electric side step driving device of the present invention have the same beneficial effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 is a schematic structural diagram of the electric side step driving device in the deployed state according to an embodiment of the present invention;

[0026] Figure 2 is a schematic structural diagram of the electric side step driving device in the retracted state from a first perspective according to an embodiment of the present invention;

[0027] Figure 3 is a schematic structural diagram of the electric side step driving device in the retracted state from a second perspective according to an embodiment of the present invention;

[0028] Figure 4 is a front view of the electric side step driving device according to an embodiment of the present invention;

[0029] Figure 5 is Figure 4 a sectional view taken along the line A-A of

[0030] Figure 6 is Figure 4 a sectional view taken along the line B-B of

[0031] Figure 7 is Figure 5 a partial sectional view of the assembly state of the upper connecting plate and the drive shaft in the C-C direction of

[0032] Figure 8 is Figure 5 a partial sectional view of another embodiment of the assembly state of the upper connecting plate and the drive shaft in the C-C direction of

[0033] Figure 9 is Figure 5 a partial enlarged view of the a position of

[0034] Figure 10 is Figure 5 a partial enlarged view of the b position of

[0035] Figure 11 is a schematic structural diagram of the crank connecting rod according to an embodiment of the present invention;

[0036] Figure 12 Schematic diagram of the front connecting plate according to an embodiment of the present invention;

[0037] Figure 13 Schematic diagram of the protective cover according to an embodiment of the present invention;

[0038] Explanation of reference numerals:

[0039] 1. Rotation driving part; 11. Driving shaft; 111. Groove; 2. Crank connecting rod; 21. Sliding groove; 22. Fixed groove; 3. Upper connecting plate; 31. Fixed hole; 32. Fixed block; 33. Screw; 34. Second shaft hole; 4. Front connecting plate; 41. Connecting plate body; 411. Third shaft hole; 412. Fourth shaft hole; 42. Slider; 5. Pedal connecting bracket; 6. Mounting bracket; 7. Protective cover; 8. Limiting mechanism; 81. First limiting block; 82. Second limiting block; 101. First pin shaft; 102. Second pin shaft; 103. Third pin shaft; 201. First shaft sleeve; 202. Second shaft sleeve; 203. Third shaft sleeve; Detailed implementation manners

[0040] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0041] In the description of the present invention, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, if terms such as "first" and "second" appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0042] In addition, in the description of the present invention, unless otherwise clearly defined, the cooperating components are connected by conventional connection structures in the art. Moreover, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific situations.

[0043] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0044] Embodiment 1

[0045] This embodiment relates to an electric side step driving device. In terms of the overall structure, in combination with Figures 1 to 13 As shown, the electric side step driving device includes a mounting bracket 6 for connecting to the vehicle body, and further includes a rotary driving part 1 arranged on the mounting bracket 6, and a crank connecting rod 2 with one end hinged to the mounting bracket 6.

[0046] Wherein, an upper connecting plate 3 is connected to the driving shaft 11 of the rotary driving part 1, and a front connecting plate 4 is provided at the other end of the crank connecting rod 2. One end of the front connecting plate 4 is inserted into the crank connecting rod 2, and a pedal connecting bracket 5 is hinged to the other end of the front connecting plate 4. Moreover, one end of the upper connecting plate 3 is fixedly connected to the driving shaft 11, and the other end of the upper connecting plate 3 is hinged to the front connecting plate 4.

[0047] At this time, driven by the rotary driving part 1, in this embodiment, the unfolding or retracting of the pedal can be realized through the rotation of the crank connecting rod 2, the upper connecting plate 3, and the front connecting plate 4, as well as the synchronous telescoping of the front connecting plate 4. At the same time, by utilizing the sliding telescoping of the front connecting plate 4, in this embodiment, the unfolding stroke of the pedal can also be increased when the electric side step is unfolded, and the cooperation between the pedal and the vehicle body skirt can be not affected when the electric side step is retracted, thereby improving the use effect of the electric pedal.

[0048] Based on the above overall introduction, specifically, as a preferred implementation manner, in combination with Figures 1 to 8 As shown, one end of the upper connecting plate 3 connected to the driving shaft 11 of this embodiment is sleeved on the driving shaft 11, and the upper connecting plate 3 is fixedly connected to the driving shaft 11 through a fixing mechanism. In this way, it can be understood that by sleeving the upper connecting plate 3 on the driving shaft 11 and through the setting of the fixing mechanism, it is beneficial for the torque of the rotary driving part 1 to be effectively transmitted to the upper connecting plate 3 through the driving shaft 11, thereby driving the rotation of the crank connecting rod 2 and the front connecting plate 4.

[0049] During specific implementation, as a preferred implementation manner, for example, the upper connecting plate 3 can be sleeved on the driving shaft 11 through a second shaft hole 34 provided at one end thereof, and still referring to Figure 7 As shown, the above fixing mechanism also includes a groove 111 provided on the driving shaft 11, a fixing hole 31 provided on the upper connecting plate 3, and a fixing block 32 fixed in the fixing hole 31, with one end of the fixing block 32 located in the groove 111. Through the setting of the groove 111, the fixing hole 31, and the fixing block 32 fixed between the two in this embodiment, the upper connecting plate 3 can be tightly fixedly connected to the driving shaft 11.

[0050] In this embodiment, the fixing block 32 can be press-fitted into the fixing hole 31 and the groove 111. It is also feasible to penetrate and open a hole perpendicular to the outer end face of the fixing block 32, and open a screw hole in the groove 111. The screw passes through the hole opened on the outer end face of the fixing block 32 and is screwed into the screw hole opened in the groove 111 in this form of fixing mechanism.

[0051] In addition, in addition to the above form of fixing mechanism, the form as shown in Figure 8 can also be adopted, that is, the fixing hole 31 as shown in Figure 8 is opened on the upper connecting plate 3, and the two side surfaces of the fixing block 32 are respectively attached to the groove 111 and the fixing hole 31 on the driving shaft 11. At the same time, a threaded hole is provided on the fixing block 32. By screwing the screw 33 into the threaded hole, the resulting tightening force is transmitted to the side surface of the fixing block 32 to form a lateral pressing force, and the driving shaft 11 and the upper connecting plate 3 are squeezed and fastened, which is also feasible.

[0052] As a preferred embodiment, in combination with Figures 1 to 6 , specifically refer to Figure 9 and Figure 11 shown, the crank connecting rod 2 is hinged to the mounting bracket 6 through the first pin shaft 101. And one end of the first pin shaft 101 is preferably press-fitted into the mounting bracket 6, and the other end of the first pin shaft 101 is rotatably connected to the crank connecting rod 2 through the first bushing 201.

[0053] In addition, in this embodiment, the upper connecting plate 3 is hinged to the front connecting plate 4 through the second pin shaft 102. And one end of the second pin shaft 102 is preferably press-fitted into the upper connecting plate 3, and the other end of the second pin shaft 102 is rotatably connected to the front connecting plate 4 through the second bushing 202. Specifically, for example, the second bushing 202 is press-fitted into the third shaft hole 411 opened at one end of the front connecting plate 4. Adopting the form of hinging with the first pin shaft 101 and the second pin shaft 102, the work is reliable and the disassembly is convenient.

[0054] It can be understood that in addition to the form of connecting with the mounting bracket 6 by interference fit, the first pin shaft 101 can also be integrally formed on the mounting bracket 6. Similarly, in addition to the form of connecting with the upper connecting plate 3 by interference fit, the second pin shaft 102 can also be integrally formed on the upper connecting plate 3, which is also feasible.

[0055] Moreover, preferably, the first bushing 201 and the second bushing 202 can adopt self-lubricating bushings in the prior art to have a better self-lubricating effect.

[0056] As a preferred embodiment, in combination with Figures 1 to 6 , and specifically refer to Figure 3As shown, a limiting mechanism 8 is provided between the mounting bracket 6 and the crank connecting rod 2. The limiting mechanism 8 is used to limit the rotation of the crank connecting rod 2 at the end of the electric side step deployment and at the end of the electric side step retraction.

[0057] It can be understood that through the setting of the limiting mechanism 8, at the end of the electric side step deployment and recovery processes, the pedal can be limited, avoiding the situation where when the pedal reaches the deployment or recovery position, the driving motor still continues to operate, resulting in collisions between the pedal and the vehicle body, thereby causing damage to them and the vehicle body, and ensuring that the pedal stops in time when it reaches the set position during deployment and recovery.

[0058] As a preferred embodiment, as Figure 3 shown, the above-mentioned limiting mechanism 8 may include, for example, a first limiting block 81 and a second limiting block 82. The first limiting block 81 is specifically arranged at the end of the deployment process when the crank connecting rod 2 rotates. When one side of the crank connecting rod 2 moves to abut against the first limiting block 81, the crank connecting rod 2 stops moving, and the electric side step deployment process ends. The second limiting block 82 is specifically arranged at the end of the recovery process when the crank connecting rod 2 rotates. When the other side of the crank connecting rod 2 abuts against the second limiting block 82, the crank connecting rod 2 stops moving, and the electric side step retraction process ends.

[0059] By setting the first limiting block 81 and the second limiting block 82 to limit the electric side step deployment and closing processes respectively, it is beneficial to adjust the limiting positions for deployment and closing respectively.

[0060] During specific implementation, preferably, the first limiting block 81 and the second limiting block 82 of this embodiment can be welded, screwed, riveted or integrally formed on the mounting bracket 6, and the specific connection form is not limited. Moreover, preferably, the first limiting block 81 and the second limiting block 82 of this embodiment are generally made of steel material, and their outer surfaces can be coated with a soft buffer material, such as rubber, so as to play a buffering role and reduce the vibration and noise caused by direct collision between hard materials.

[0061] In addition, further preferably, in addition to using a mechanical structure for limiting, the first limiting block 81 and the second limiting block 82 can also use limit switches, that is, the opening and closing of the driving motor are controlled by electrical signals, such as microswitches, photoelectric switches, etc. In this way, the vibration and noise generated by the contact and collision between the crank connecting rod 2 and the limiting mechanism 8 can be further reduced or eliminated.

[0062] As a preferred embodiment, in combination with Figures 1 to 6 , specifically referring to Figure 11 shown, the crank connecting rod 2 is arc-shaped. One end of the crank connecting rod 2 where the front connecting plate 4 is provided is formed with a chute 21. The chute 21 is specifically located on the outer peripheral wall of the crank connecting rod 2, and one end of the front connecting plate 4 is slidably inserted into the chute 21.

[0063] Through the arc-shaped setting of the crank connecting rod 2, it is beneficial for the crank connecting rod 2 to avoid the drive shaft 11 during the rotation process, enabling it to obtain a larger rotation angle. The chute 21 provided on the outer peripheral wall of the crank connecting rod 2 can achieve the sliding insertion of one end of the front connecting plate 4 into the crank connecting rod 2 and can prevent it from disengaging when sliding relative to the crank connecting rod 2.

[0064] As a preferred embodiment, combined with Figures 11 to 13 , such as Figures 1 to 4 shown, a deformable protective cover 7 is provided between the front connecting plate 4 and the crank connecting rod 2, and the part of the front connecting plate 4 that is slidably connected to the crank connecting rod 2 is located inside the protective cover 7.

[0065] In this embodiment, through the setting of the protective cover 7, dust protection is implemented on the contact part between the chute 21 and one end of the front connecting plate 4, preventing dust from entering the part where the chute 21 and one end of the front connecting plate 4 are slidably connected, and ensuring the stable operation of the relative sliding between the front connecting plate 4 and the crank connecting rod 2.

[0066] During specific implementation, as Figure 13 shown, the protective cover 7 can adopt a corrugated pipe structure with a square cross-section, sleeved outside one end of the front connecting plate 4, and the two ends can be connected to the crank connecting rod 2 and the connecting plate main body 41 respectively, for example, by bonding, clamping, riveting or screwing. Additionally, preferably, as Figure 11 shown, on the outer peripheral wall of the crank connecting rod 2 where the chute 21 is provided, a fixing groove 22 is provided around the chute 21, the chute 21 is located inside the fixing groove 22, and one end of the protective cover 7 connected to the crank connecting rod 2 is preferably embedded in the fixing groove 22. In this way, it is beneficial for the fixing of the protective cover 7.

[0067] As a preferred embodiment, combined with Figures 1 to 5 , and specifically referring to Figure 6 and Figure 12 shown, the front connecting plate 4 of this embodiment has a connecting plate main body 41 and a slider 42 connected to one end of the connecting plate main body 41, and the cross-section of the slider 42 perpendicular to the sliding direction is smaller than that of the connecting plate main body 41. In this embodiment, the slider 42 is slidably inserted into the chute 21 on the crank connecting rod 2, and moreover, the connecting plate main body 41 is hingedly connected to the pedal connecting bracket 5. The protective cover 7 is sleeved outside the slider 42 and is connected between the crank connecting rod 2 and the connecting plate main body 41.

[0068] At this time, by setting the above-mentioned slider 42 and sliding it into the crank connecting rod 2, it is convenient for the protective cover 7 to be sleeved outside the slider 42. Compared with being sleeved on the connecting plate body 41 with a cross-section larger than that of the slider 42, the protective cover 7 being sleeved outside the slider 42 is beneficial to reducing the cross-sectional area of the protective cover 7, thereby reducing the cost of the protective cover 7. At the same time, the protective cover 7 can be abutted and arranged on the end face of the connecting plate body 41 around the root of the slider 42, which is beneficial to the fixation of the protective cover 7. In addition, the connecting plate body 41 is hinged to the pedal connecting bracket 5, with reliable work and convenient disassembly.

[0069] Preferably, in specific implementation, a fourth shaft hole 412 is opened at one end of the connecting plate body 41 far from the slider 42, and a third shaft hole 411 is opened between the slider 42 and the fourth shaft hole 412. The pedal connecting bracket 5 is hinged to the connecting plate body 41 through a third pin shaft 103 and a third bushing 203, and preferably, both ends of the third pin shaft 103 are inserted into the pedal connecting bracket 5 by an interference fit method.

[0070] The electric side step driving device of this embodiment can drive the rotation of the crank connecting rod 2, the upper connecting plate 3, and the front connecting plate 4 through the rotation driving part 1, and drive the sliding and telescoping of the front connecting plate 4, so as to increase the pedal deployment stroke when the electric side step is deployed, and not affect the cooperation between the pedal and the body skirt when the electric side step is retracted, thereby improving the use effect of the electric pedal.

[0071] Embodiment 2

[0072] This embodiment relates to a vehicle, which is provided with an electric side step, and the electric side step adopts the electric side step driving device in Embodiment 1.

[0073] By applying the electric side step driving device in Embodiment 1, this embodiment of the vehicle is beneficial to increasing the pedal deployment stroke when the vehicle electric side step is deployed, and not affecting the cooperation between the pedal and the body skirt when the electric side step is retracted, thereby improving the use effect of the vehicle electric pedal.

[0074] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric side step driving device, characterized in that: It includes a mounting bracket (6) for connecting with the vehicle body, a rotary driving part (1) arranged on the mounting bracket (6), and a crank connecting rod (2) with one end hinged on the mounting bracket (6); An upper connecting plate (3) is connected to the driving shaft (11) of the rotary driving part (1), and a front connecting plate (4) is arranged at the other end of the crank connecting rod (2); One end of the front connecting plate (4) is slidably inserted into the crank connecting rod (2), a pedal connecting bracket (5) is hinged at the other end of the front connecting plate (4), one end of the upper connecting plate (3) is fixedly connected to the driving shaft (11), and the other end of the upper connecting plate (3) is hinged and connected to the front connecting plate (4); The end of the upper connecting plate (3) connected to the driving shaft (11) is sleeved on the driving shaft (11), and the upper connecting plate (3) is fixedly connected to the driving shaft (11) through a fixing mechanism; The crank connecting rod (2) is arc-shaped, a chute (21) is formed at the end of the crank connecting rod (2) where the front connecting plate (4) is arranged, the chute (21) is located on the outer peripheral wall of the crank connecting rod (2), and one end of the front connecting plate (4) is slidably inserted into the chute (21).

2. The electric side step driving device according to claim 1, characterized in that: The fixing mechanism includes a groove (111) arranged on the driving shaft (11), a fixing hole (31) arranged on the upper connecting plate (3), and a fixing block (32) fixed in the fixing hole (31), and one end of the fixing block (32) is located in the groove (111).

3. The electric side step driving device according to claim 1, characterized in that: The crank connecting rod (2) is hinged to the mounting bracket (6) through a first pin shaft (101), one end of the first pin shaft (101) is press-fitted into the mounting bracket (6), and the other end of the first pin shaft (101) is rotatably connected to the crank connecting rod (2) through a first bushing (201); and / or, The upper connecting plate (3) is hinged to the front connecting plate (4) through a second pin shaft (102), one end of the second pin shaft (102) is press-fitted into the upper connecting plate (3), and the other end of the second pin shaft (102) is rotatably connected to the front connecting plate (4) through a second bushing (202).

4. The electric side step driving device according to claim 1, characterized in that: A limiting mechanism (8) is arranged between the mounting bracket (6) and the crank connecting rod (2), and the limiting mechanism (8) is used for limiting the rotation of the crank connecting rod (2) at the end when the electric side step is unfolded and at the end when the electric side step is retracted.

5. The electric side step driving device according to claim 4, characterized in that: The limiting mechanism (8) includes a first limiting block (81) and a second limiting block (82) arranged on the mounting bracket (6); At the end of the deployment of the electric side step, one side of the crank connecting rod (2) abuts against the first limit block (81), and at the end of the retraction of the electric side step, the other side of the crank connecting rod (2) abuts against the second limit block (82).

6. The electric side step driving device according to any one of claims 1 to 5, characterized in that: A deformable protective cover (7) is provided between the front connecting plate (4) and the crank connecting rod (2), and the part of the front connecting plate (4) that is slidably connected to the crank connecting rod (2) is located inside the protective cover (7).

7. The electric side step driving device according to claim 6, characterized in that: The front connecting plate (4) has a connecting plate main body (41) and a slider (42) connected to one end of the connecting plate main body (41), and the cross-section of the slider (42) is smaller than that of the connecting plate main body (41); The slider (42) is slidably inserted onto the crank connecting rod (2), the connecting plate main body (41) is hinged to the pedal connecting bracket (5), and the protective cover (7) is sleeved outside the slider (42) and connected between the crank connecting rod (2) and the connecting plate main body (41).

8. A vehicle, characterized in that: The vehicle is provided with an electric side step, and the electric side step adopts the electric side step driving device according to any one of claims 1 to 7.

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