Novel automobile anti-skid folding pedal

Abstract

The invention relates to the technical field of automobile anti-skid pedals, in particular to a novel automobile anti-skid folding pedal which comprises a main pedal, cleaning assemblies are arranged on the inner side and the lower portion of the main pedal, each cleaning assembly comprises six supports rotationally installed on the inner side of the main pedal, and every three supports form a group in the horizontal transverse direction; bosses are transversely and fixedly mounted on the upper portion and the lower portion of the support, a mounting frame is slidably mounted from the outer side to the lower portion of the support, U-shaped water heads are fixedly mounted at the two ends of the inner side of the mounting frame, cleaning shafts are rotatably mounted in the mounting frame, the number of the cleaning shafts is three, and the cleaning shafts are arranged in a U shape. Under the action of the first motor, the worm and the worm gear, the support can drive the boss to rotate, so that the face, making contact with a user, of the support is always in a clean state, the situation that the soles of the user slip due to excessive sludge is avoided, and the personal safety of the user is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of anti-skid pedals for automobiles, in particular to a novel anti-skid folding pedal for automobiles. Background Art

[0002] The car anti-slip folding pedal is a foot pedal device designed specifically for cars. It combines the two major functional features of anti-slip and folding to provide drivers and passengers with a safer and more convenient experience of getting on and off the car. The car anti-slip folding pedal is usually made of anti-slip materials such as rubber, silicone, etc.

[0003] Since materials such as rubber and silicone have a good friction coefficient, they can effectively prevent sliding when stepping on the vehicle, ensuring the safety of the driver and passengers when getting on and off the vehicle.

[0004] As a special type of vehicle, off-road vehicles often travel on muddy, rainy and snowy roads. After users walk in such an environment, their feet often slip on the pedals when getting on the vehicle. In addition, the off-road vehicle has a high chassis, which further aggravates the situation of users' feet slipping when getting on the vehicle.

[0005] Therefore, we specially propose a novel anti-skid folding pedal for automobile. Summary of the invention

[0006] The purpose of the present invention is to provide a new type of anti-skid folding pedal for automobiles, which can allow the bracket to rotate with the boss under the action of a first motor, a worm and a worm gear, so that the side of the bracket that contacts the user is always in a clean state, thereby avoiding excessive mud that causes the user's feet to slip, ensuring the personal safety of the user, and solving the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: a novel anti-skid folding pedal for automobiles, comprising a main pedal, wherein a cleaning assembly is provided on the inner side and the lower part of the main pedal, wherein the cleaning assembly comprises a bracket rotatably mounted on the inner side of the main pedal, wherein the number of the brackets is six, and each three brackets form a group horizontally;

[0008] The upper and lower parts of the bracket are both transversely fixed with bosses, a mounting frame is slidably mounted from the outer side to the lower part of the bracket, and both ends of the inner side of the mounting frame are fixedly mounted with U-shaped water heads;

[0009] A cleaning shaft is rotatably mounted inside the mounting frame, and the number of the cleaning shafts is three and they are arranged in a U shape;

[0010] A third motor is fixedly installed inside the mounting frame, a first gear is fixedly installed on the output shaft of the third motor, a second gear is fixedly installed on the circumferential surface of one end of the longitudinal cleaning shaft, and the second gear is meshed with the first gear;

[0011] An L-shaped connecting shaft is rotatably installed between two adjacent cleaning shafts.

[0012] Preferably, a cavity is opened in the middle of the main pedal, a first motor is fixedly mounted on the rear end surface of the middle of the main pedal, a worm is fixedly mounted on the output shaft of the first motor, and the worm is rotatably mounted inside the cavity.

[0013] Preferably, a connecting shaft is rotatably installed inside the cavity, the number of the connecting shafts is three, a worm wheel is fixedly installed on the circumferential surface of the connecting shaft, the worm wheel is meshed with the worm, and both ends of the connecting shaft are fixedly connected to adjacent brackets.

[0014] Preferably, latches are fixedly mounted at both ends of the lower portion of the main pedal, a mounting shaft is fixedly mounted on the circumferential surface of the latch, and one end of the mounting shaft is rotatably connected to an adjacent bracket.

[0015] Preferably, a water tank is fixedly installed at the lower middle end of the main pedal, and reset wheels are rotatably installed on both sides of the water tank. The number of the reset wheels is six, and a hose is wrapped around the circumferential surface of the reset wheel. One end of the hose is fixedly connected to the water tank, and the other end of the hose is fixedly connected to and passes through an adjacent mounting frame.

[0016] Preferably, a second motor is fixedly mounted on the circumferential surface of the mounting shaft, a screw is fixedly mounted on the output shaft of the second motor, and the mounting frame is slidably mounted on the circumferential surface of the screw by means of threads.

[0017] Preferably, connecting plates are fixedly mounted on both ends of the lower portion of the main pedal and the lower end surface of the water tank, and a cavity column is rotatably mounted on the front lower end of the connecting plate.

[0018] Preferably, an annular press is fixedly installed inside the cavity column, a sliding rod is slidably installed from the lower end of the cavity column to the inside, the upper end of the sliding rod passes through the annular press, and the upper end diameter of the sliding rod is consistent with the diameter of the annular press.

[0019] Preferably, a connecting rod is fixedly installed at the lower end of the sliding rod, and a spring is fixedly installed between the upper end of the connecting rod and the lower end of the cavity column.

[0020] Preferably, a secondary pedal is fixedly installed on the lower end of the connecting rod, a U-shaped rod is fixedly installed on the inner side of the secondary pedal, a fourth motor is fixedly installed on both ends of the inner part of the secondary pedal, a third gear is fixedly installed on the output shaft at both ends of the fourth motor, and a cleaning chain is rotatably installed on the circumferential surface of the two third gears horizontally, and the cleaning chain is slidably installed inside the U-shaped rod.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Compared with the traditional anti-slip pedals on the market, the present invention can make the bracket rotate with the boss under the action of the first motor, the worm and the worm gear, so that the side of the bracket in contact with the user is always in a clean state, thereby avoiding excessive mud causing the user's feet to slip, and ensuring the personal safety of the user.

[0023] 2. Compared with traditional pedals on the market, the present invention can always clean the downward boss under the action of the second motor, the mounting frame, the U-shaped water head and other structures, so as to ensure that the boss and the bracket can remain clean during subsequent use to prevent users from slipping.

[0024] 3. The present invention can clean the soles of the user's shoes under the action of the secondary pedal, cleaning chain and other structures, so that the mud or rainwater on the soles of the user can be cleaned, avoiding slipping of the soles of the feet during the process of getting on the vehicle.

[0025] 4. The present invention can maintain a real-time working state under the action of multiple structures such as the annular presser, allowing the user to clean the sole of the shoe and adjust and clean the bracket and the boss at the moment the user steps on the pedal, thereby ensuring the safety of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a main schematic diagram of the present invention;

[0028] Figure 2 It is a schematic diagram of the main pedal of the present invention;

[0029] Figure 3 is a schematic diagram of a bracket of the present invention;

[0030] Figure 4 It is a schematic diagram of a water tank of the present invention;

[0031] Figure 5 It is a schematic diagram of a water tank and a U-shaped water head of the present invention;

[0032] Figure 6 It is a schematic diagram of the mounting frame of the present invention;

[0033] Figure 7 A schematic diagram of a secondary pedal of the present invention;

[0034] Figure 8 It is a schematic diagram of a cleaning chain of the present invention;

[0035] Description of reference numerals:

[0036] 1. Main pedal; 2. Cavity;

[0037] 40. Cleaning assembly; 3. First motor; 4. Worm; 5. Worm wheel; 6. Connecting shaft; 7. Bracket; 8. Boss; 9. Mounting shaft; 10. Latch; 11. Second motor; 12. Screw; 13. Mounting frame; 14. U-shaped water head; 15. Third motor; 16. First gear; 17. Cleaning shaft; 18. L-shaped connecting shaft; 19. Second gear; 20. Water tank; 21. Reset wheel; 22. Hose;

[0038] 23. Connecting plate; 24. Cavity column; 25. Annular pressure device; 26. Sliding rod; 27. Spring; 28. Connecting rod; 29. ​​Second pedal; 30. U-shaped rod; 31. Fourth motor; 32. Third gear; 33. Cleaning chain. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figures 1 to 6 , the present invention provides a technical solution:

[0041] A novel anti-skid folding pedal for automobiles comprises a main pedal 1, wherein a cleaning assembly 40 is provided on the inner side and the lower part of the main pedal 1, wherein the cleaning assembly 40 comprises a bracket 7 rotatably mounted on the inner side of the main pedal 1, wherein the number of the brackets 7 is six, and each three brackets are horizontally arranged in a group, wherein bosses 8 are fixedly mounted on the upper and lower parts of the bracket 7 in a horizontal direction, wherein a mounting frame 13 is slidably mounted from the outer side to the lower part of the bracket 7, wherein both inner ends of the mounting frame 13 are fixedly mounted with U-shaped water heads 14, wherein a cleaning shaft 17 is rotatably mounted inside the mounting frame 13, wherein the number of the cleaning shafts 17 is three and they are arranged in a U shape; wherein a third motor 15 is fixedly mounted inside the mounting frame 13, wherein a first gear 16 is fixedly mounted on the output shaft of the third motor 15, wherein a second gear 19 is fixedly mounted on the circumferential surface of one end of the longitudinal cleaning shaft 17, wherein the second gear 19 is meshed with the first gear 16, and an L-shaped connecting shaft 18 is rotatably mounted between two adjacent cleaning shafts 17.

[0042] A cavity 2 is opened in the middle of the main pedal 1, and a first motor 3 is fixedly installed on the rear end surface of the middle part of the main pedal 1. A worm 4 is fixedly installed on the output shaft of the first motor 3. The worm 4 is rotatably installed inside the cavity 2. A connecting shaft 6 is rotatably installed inside the cavity 2. There are three connecting shafts 6. A worm wheel 5 is fixedly installed on the circumferential surface of the connecting shaft 6. The worm wheel 5 is meshed with the worm 4, and both ends of the connecting shaft 6 are fixedly connected to adjacent brackets 7.

[0043] Pins 10 are fixedly installed at both ends of the lower part of the main pedal 1, and a mounting shaft 9 is fixedly installed on the circumferential surface of the pin 10. One end of the inner side of the mounting shaft 9 is rotatably connected to the adjacent bracket 7. A water tank 20 is fixedly installed at the lower end of the middle part of the main pedal 1, and reset wheels 21 are rotatably installed on both sides of the water tank 20. There are six reset wheels 21, and a hose 22 is wrapped around the circumferential surface of the reset wheel 21. One end of the hose 22 is fixedly connected to the water tank 20, and the other end of the hose 22 is fixedly connected to and passes through the adjacent mounting frame 13.

[0044] By adopting the above technical solution, a main pedal 1 is included, and a cavity 2 is opened inside the middle part of the main pedal 1, wherein the first motor 3 of the cleaning assembly 40 is fixedly installed on the rear end surface of the middle part of the main pedal 1.

[0045] During use, the output shaft of the first motor 3 will rotate synchronously with the worm 4, and the worm 4 is rotatably installed inside the cavity 2. During the rotation of the worm 4, the meshing worm wheel 5 will be driven to rotate synchronously.

[0046] At this time, the three worm gears 5 rotate in the same direction and at the same rate. Therefore, during use, the worm gear 5 will rotate synchronously with the fixed connecting shaft 6, and because the rotation direction and rate are the same, it is avoided that when the subsequent connecting shaft 6 rotates with the bracket 7, the rotation angles of the front and rear and middle brackets 7 are in a consistent state.

[0047] Then, during the rotation process, the bracket 7 will rotate synchronously with the fixedly connected boss 8, so that the boss 8 facing different directions can be exchanged in position. During the rotation process, the ends of the two horizontal and transverse brackets 7 that are away from each other are rotated and installed with mounting shafts 9, and the mounting shafts 9 are fixedly connected to the main pedal 1 under the action of the latch 10, so that under the action of the mounting shafts 9 and the latch 10, the end of the horizontal and transverse bracket 7 away from the connecting shaft 6 will not fall off.

[0048] Then, the second motor 11 is started, and the output shaft of the second motor 11 drives the screw rod 12 to rotate. During the rotation of the screw rod 12, the mounting bracket 13 can perform linear reciprocating motion under the action of the thread transmission.

[0049] During the movement, the mounting frame 13 will move synchronously with the inner structure. For example, during the movement of the mounting frame 13, the U-shaped water heads 14 at both ends of the inner side will spray water to flush the side and lower end surface of the bracket 7; because during use, the water pump inside the water tank 20 fixedly installed at the lower end of the middle part of the main pedal 1 will operate, and under the action of the water pump, the clean water inside the water tank 20 can enter the inside of the hose 22, and then enter the inside of the mounting frame 13, and the mounting frame 13 and the U-shaped water head 14 are connected through holes. Therefore, the water inside the water tank 20 can enter the inside of the U-shaped water head 14, so that the flushing operation can be performed. In addition, it should be noted that when the mounting frame 13 is close to the water tank 20, the reset wheel 21 will carry the hose 22 for winding operation to avoid the tediousness of the hose 22 being unable to be collected or requiring manual winding.

[0050] Secondly, during the movement of the mounting frame 13, the third motor 15 is started, and the output shaft of the third motor 15 will rotate synchronously with the first gear 16, and the first gear 16 will drive the second gear 19 to rotate synchronously. At this time, under the action of the second gear 19, the fixedly connected cleaning shaft 17 will rotate synchronously, and this cleaning shaft 17 will rotate synchronously with the L-shaped connecting shafts 18 at both ends during the rotation (it should be noted that the L-shaped connecting shaft 18 is in a rotational connection with the cleaning shaft 17 but also in a sliding connection. Therefore, the cleaning shaft 17 will rotate synchronously with the L-shaped connecting shaft 18 during the rotation. However, in order to avoid the L-shaped connecting shaft 18 due to the rotation of the cleaning shaft 17, the two ends of the L-shaped connecting shaft 18 need to slide synchronously during the rotation, so as not to affect the rotation of the cleaning shaft 17), and the L-shaped connecting shaft 18 will also drive the vertical cleaning shaft 17 to rotate synchronously, so that the bracket 7 can be fully cleaned, so that the bracket 7 can be kept in a clean state at all times, and the personnel can avoid sliding during the process of getting on the car, thereby ensuring the personal safety of the personnel.

[0051] Specifically, Figures 7 and 8 As shown, a second motor 11 is fixedly mounted on the circumferential surface of the mounting shaft 9, a screw rod 12 is fixedly mounted on the output shaft of the second motor 11, and the mounting frame 13 is mounted on the circumferential surface of the screw rod 12 by threaded sliding. Connecting plates 23 are fixedly mounted on both ends of the lower part of the main pedal 1 and the lower end surface of the water tank 20, and a cavity column 24 is rotatably mounted on the front lower end of the connecting plate 23.

[0052] An annular pressure device 25 is fixedly installed inside the cavity column 24, and a sliding rod 26 is slidably installed from the lower end of the cavity column 24 to the inside, and the upper end of the sliding rod 26 passes through the annular pressure device 25. The upper end diameter of the sliding rod 26 is consistent with the diameter of the annular pressure device 25, and a connecting rod 28 is fixedly installed on the lower end of the sliding rod 26, and a spring 27 is fixedly installed between the upper end of the connecting rod 28 and the lower end of the cavity column 24, and a secondary pedal 29 is fixedly installed on the lower end of the connecting rod 28, and a U-shaped rod 30 is fixedly installed on the inner side of the secondary pedal 29, and a fourth motor 31 is fixedly installed at both ends of the inner side of the secondary pedal 29, and a third gear 32 is fixedly installed on the output shaft at both ends of the fourth motor 31, and a cleaning chain 33 is rotatably installed on the circumferential surface of the two horizontal third gears 32, and the cleaning chain 33 is slidably installed inside the U-shaped rod 30.

[0053] By adopting the above technical solution, including the connecting plates 23 fixedly installed at the two ends of the lower part of the main pedal 1 and the lower end of the water tank 20, the front lower end of the connecting plate 23 is rotatably installed with a cavity column 24, and the lower end of the cavity column 24 is slidably installed with a sliding rod 26, and the inner lower end of the cavity column 24 is fixedly installed with an annular pressure device 25.

[0054] At this time, the upper end of the slide bar 26 passes through the annular press 25, and the top diameter of the slide bar 26 is consistent with the diameter of the annular press 25, so that it can be ensured that the slide bar 26 can trigger the annular press 25 during the sliding process.

[0055] Then, a connecting rod 28 is fixedly installed at the lower end of the slide rod 26, and a spring 27 is fixedly installed between the upper end of the connecting rod 28 and the lower end of the cavity column 24 to allow the slide rod 26 to reset itself.

[0056] In addition, a secondary pedal 29 is commonly installed at the lower ends of the two connecting rods 28. The upper end surface to the lower end surface of the secondary pedal 29 are in a through state. A U-shaped rod 30 is fixedly installed inside the secondary pedal 29. Then, a fourth motor 31 is fixedly installed inside the two ends of the secondary pedal 29. The fourth motor 31 is a double-axis. Therefore, two third gears 32 are fixedly installed at both ends of the fourth motor 31, and a cleaning chain 33 is rotatably installed on the circumferential surface of the two third gears 32 horizontally.

[0057] When in use, the cavity column 24 is rotated, and the cavity column 24 rotates synchronously with the sliding rod 26 and the spring 27. At this time, the spring 27 and the sliding rod 26 will rotate with the connecting rod 28, so that a ninety-degree angle can be formed between the connecting plate 23, and then the connecting rod 28 will rotate synchronously with the secondary pedal 29, so that the secondary pedal 29 can facilitate people to get on and off the vehicle.

[0058] When people get on or off the vehicle, they step on the secondary pedal 29. At this time, the secondary pedal 29 will slide downward, and when the secondary pedal 29 slides downward, it will slide synchronously with the connecting rod 28, and then the connecting rod 28 will slide synchronously with the sliding rod 26, so that the upper end of the sliding rod 26 can contact the annular pressure device 25, thereby triggering the next step (it should be noted that during use, the annular pressure device 25 will be connected to the circuit board in the vehicle, so that the annular pressure device 25 can transmit the signal to the inside of the vehicle, thereby starting the fourth motor 31).

[0059] At this time, the output shaft of the fourth motor 31 will rotate synchronously with the third gear 32, and the third gear 32 will drive the cleaning chain 33 to clean the soles of the user's shoes, so that the remaining silt can fall off from the soles of the user's feet, so that the user will not slip, thereby ensuring the safety of the user.

[0060] Working principle: First, under the action of the annular press 25, the output shaft of the fourth motor 31 can rotate synchronously with the third gear 32, so that the cleaning chain 33 can clean the sole of the user to avoid slipping when lifting the legs upward.

[0061] At this time, the output shaft of the first motor 3 will rotate with the worm 4, so that the worm wheel 5 can drive the connecting shaft 6 to rotate synchronously, thereby causing the bracket 7 to rotate.

[0062] Then, start the second motor 11, and the output shaft of the second motor 11 rotates synchronously with the screw 12, so that the mounting frame 13 moves linearly. During the movement, the mounting frame 13 will move synchronously with the U-shaped water head 14 and the cleaning shaft 17, so that the bracket 7 can be cleaned.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel anti-skid folding pedal for automobiles, comprising a main pedal (1), characterized in that: A cleaning assembly (40) is provided on the inner side and lower part of the main pedal (1), and the cleaning assembly (40) comprises a bracket (7) rotatably mounted on the inner side of the main pedal (1), and the number of the brackets (7) is six, and each three brackets form a group horizontally; The upper and lower parts of the bracket (7) are both transversely fixedly mounted with bosses (8), a mounting frame (13) is slidably mounted from the outer side to the lower part of the bracket (7), and U-shaped water heads (14) are fixedly mounted at both ends of the inner side of the mounting frame (13); A cleaning shaft (17) is rotatably mounted inside the mounting frame (13), and the number of the cleaning shafts (17) is three and they are arranged in a U shape; A third motor (15) is fixedly mounted inside the mounting frame (13), a first gear (16) is fixedly mounted on the output shaft of the third motor (15), a second gear (19) is fixedly mounted on the circumferential surface of one end of the longitudinal cleaning shaft (17), and the second gear (19) is meshed with the first gear (16); An L-shaped connecting shaft (18) is rotatably mounted between two adjacent cleaning shafts (17).

2. The novel anti-skid folding pedal for automobile according to claim 1 is characterized in that: A cavity (2) is provided in the middle of the main pedal (1); a first motor (3) is fixedly mounted on the rear end surface of the middle of the main pedal (1); a worm (4) is fixedly mounted on the output shaft of the first motor (3); and the worm (4) is rotatably mounted inside the cavity (2).

3. The novel anti-skid folding pedal for automobile according to claim 2 is characterized in that: A connecting shaft (6) is rotatably mounted inside the cavity (2), the number of the connecting shafts (6) being three, a worm wheel (5) is fixedly mounted on the circumferential surface of the connecting shaft (6), the worm wheel (5) is meshed with the worm (4), and both ends of the connecting shaft (6) are fixedly connected to adjacent brackets (7).

4. The novel anti-skid folding pedal for automobile according to claim 3 is characterized in that: Latch pins (10) are fixedly mounted at both ends of the lower part of the main pedal (1), a mounting shaft (9) is fixedly mounted on the circumferential surface of the latch pin (10), and one end of the inner side of the mounting shaft (9) is rotatably connected to an adjacent bracket (7).

5. The novel anti-skid folding pedal for automobile according to claim 4 is characterized in that: A water tank (20) is fixedly mounted at the lower middle end of the main pedal (1), and reset wheels (21) are rotatably mounted on both sides of the water tank (20). The number of the reset wheels (21) is six, and a hose (22) is wound around the circumferential surface of the reset wheel (21). One end of the hose (22) is fixedly connected to the water tank (20), and the other end of the hose (22) is fixedly connected to and passes through an adjacent mounting frame (13).

6. The novel anti-skid folding pedal for automobile according to claim 5 is characterized in that: A second motor (11) is fixedly mounted on the circumferential surface of the mounting shaft (9), a screw rod (12) is fixedly mounted on the output shaft of the second motor (11), and the mounting frame (13) is slidably mounted on the circumferential surface of the screw rod (12) through threads.

7. The novel anti-skid folding pedal for automobile according to claim 5 is characterized in that: Both ends of the lower part of the main pedal (1) and the lower end surface of the water tank (20) are fixedly mounted with connecting plates (23), and the front lower end of the connecting plate (23) is rotatably mounted with a cavity column (24).

8. The novel anti-skid folding pedal for automobile according to claim 7 is characterized in that: An annular pressure device (25) is fixedly installed inside the cavity column (24), and a sliding rod (26) is slidably installed from the lower end of the cavity column (24) to the inside, and the upper end of the sliding rod (26) passes through the annular pressure device (25), and the upper end diameter of the sliding rod (26) is consistent with the diameter of the annular pressure device (25).

9. The novel anti-skid folding pedal for automobile according to claim 8 is characterized in that: A connecting rod (28) is fixedly mounted on the lower end of the sliding rod (26), and a spring (27) is fixedly mounted between the upper end of the connecting rod (28) and the lower end of the cavity column (24).

10. The novel anti-skid folding pedal for automobile according to claim 1 is characterized in that: A secondary pedal (29) is fixedly mounted on the lower end of the connecting rod (28), a U-shaped rod (30) is fixedly mounted on the inner side of the secondary pedal (29), a fourth motor (31) is fixedly mounted on both ends of the inner side of the secondary pedal (29), and a third gear (32) is fixedly mounted on the output shaft at both ends of the fourth motor (31). A cleaning chain (33) is rotatably mounted on the circumferential surfaces of the two third gears (32) in a horizontal manner. The cleaning chain (33) is slidably mounted inside the U-shaped rod (30).

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