Stationary bicycle with two rear wheels driven by pedals and self-leveling

Abstract

This invention relates to a standing-riding reciprocating pedal self-leveling dual-wheel drive tricycle, comprising a frame (1), a front fork (2), handlebars (3), a front wheel (4), a left rear wheel (5), and a right rear wheel (6). A transmission box (7) is located at the rear of the frame (1), on which a left drive shaft (71), a right drive shaft (72), and a rear wheel axle (73) are mounted. A left yoke (75) is located at the left end of the left drive shaft, and a right yoke (76) is located at the right end of the right drive shaft. The left and right ends of the rear wheel axle are fixedly connected to the left rear wheel (5) and the right rear wheel (6), respectively. A pedal self-leveling device (9) is located on the left and right sides of the transmission box. This device significantly improves driving force and riding speed, preventing fatigue during long rides. It keeps the pedal surface parallel to the ground, eliminating the need for the rider to use their lower limbs to maintain pedal level, thus improving comfort while standing.

Description

Technical Field

[0001] This invention relates to bicycles, and more specifically to a two-wheel drive tricycle with self-leveling pedals for standing and reciprocating pedaling. Background Technology

[0002] The conventional way to ride a tricycle is for the rider to sit on the seat and pedal with both legs in a circular motion. When carrying a load or climbing a hill, the rider sometimes stands up and uses their body weight to increase the force of pedaling. Alternatively, they may sit and pedal rapidly back and forth to provide a more continuous driving force and prevent the tricycle from slowing down or stopping. It's clear that both standing and pedaling back and forth can increase the driving force of a tricycle and thus increase riding speed. However, because the pedals of a typical tricycle are rotating and mounted on pedal axles, standing while riding requires both pressing down on the pedals and keeping them level, which can lead to leg and foot fatigue over extended periods. Summary of the Invention

[0003] The purpose of this invention is to provide a standing, reciprocating pedal-driven tricycle that can improve driving force and riding speed, and does not cause fatigue during long rides.

[0004] The technical solution of this invention is as follows: It includes a frame, a front fork, handlebars, a front wheel, a left rear wheel, and a right rear wheel. The upper part of the front fork is rotatably mounted inside the head tube at the front of the frame, and the front wheel is rotatably mounted on the front fork. The lower end of the handlebar column is connected to the front fork. A transmission box is provided at the rear of the frame. A left drive shaft, a right drive shaft, and a rear wheel axle connected by a transmission device are rotatably mounted on the transmission box. The left end of the left drive shaft extends outside the transmission box, and a left slalom with a pedal facing forward of the frame is provided laterally. The right end of the right drive shaft extends outside the transmission box, and a right slalom with a pedal facing forward of the frame is provided laterally. The left and right ends of the rear wheel axle extend outside the transmission box respectively and are fixedly connected to the left and right rear wheels respectively. When the pedals on the left and right slaloms are alternately pressed, they drive the left and right rear wheels to rotate forward and drive the pedals on the opposite slaloms to rise respectively. Self-leveling devices for keeping the pedal surfaces parallel to the ground are provided on the left and right sides of the transmission box.

[0005] The technical advantages of this invention are: it adopts a standing, reciprocating pedaling method, which can significantly improve driving force and riding speed, and prevent fatigue during long rides. It keeps the pedal surface parallel to the ground at all times, eliminating the need for the rider to use their lower limbs to control the pedals and maintain horizontality, making the rider feel more stable and grounded, facilitating pedaling power, and improving the comfort of standing riding. Its compact and stable structure takes up little space for riding and storage, suitable for both normal riding and leisure activities, offering effortless, safe, and comfortable riding. Its low center of gravity and good three-wheel support stability allow for easy stopping and riding at any time. Attached Figure Description

[0006] Figure 1 The three-dimensional structure of the present invention Figure One ; Figure 2 The three-dimensional structure of the present invention Figure Two ; Figure 3 The transmission device of the present invention has a three-dimensional structure. Figure One ; Figure 4 The transmission device of the present invention has a three-dimensional structure. Figure Two . Detailed Implementation

[0007] like Figure 1 , Figure 2 As shown, it includes a frame 1, a front fork 2, handlebars 3, a front wheel 4, a left rear wheel 5, and a right rear wheel 6. The upper part of the front fork 2 is rotatably mounted inside the head tube 11 at the front of the frame 1. The front wheel 4 is rotatably mounted on the front fork 2. The lower end of the handlebar 3's upright is connected to the front fork 2. A transmission box 7 is provided at the rear of the frame 1. A left drive shaft 71, a right drive shaft 72, and a rear wheel axle 73, connected by a transmission device 8, are rotatably mounted on the transmission box 7. The left end of the left drive shaft 71 extends outside the transmission box 7. A left yoke 75, with its other end facing forward of the frame 1 and equipped with a foot pedal 74, is provided laterally. The right drive shaft 71... The right end of the drive shaft 72 extends outside the transmission box 7. A right wheel 76 with the other end facing the front of the frame 1 and equipped with a foot pedal 74 is provided laterally. The left and right ends of the rear wheel axle 73 extend outside the transmission box 7 respectively and are fixedly connected to the left rear wheel 5 and the right rear wheel 6 respectively. When the foot pedals 74 on the left wheel 75 and the right wheel 76 are alternately pressed down, they drive the left rear wheel 5 and the right rear wheel 6 to rotate forward and drive the foot pedals 74 on the opposite wheel 76 to rise. The left and right sides of the transmission box 7 are respectively provided with foot pedal self-leveling devices 9 to keep the foot surface of the foot pedal 74 parallel to the ground.

[0008] A front wheel mudguard 41 is provided above and behind the front wheel 4 and mounted on the front fork 2.

[0009] The left and right sides of the transmission box 7 are respectively provided with a left half shaft sleeve 77 and a right half shaft sleeve 78, which are fitted onto the outside of the rear wheel axle 73. The right end of the left half shaft sleeve 77 and the left end of the right half shaft sleeve 78 are respectively fixed to the housing of the transmission box 7. The left end of the left half shaft sleeve 77 and the right end of the right half shaft sleeve 78 are respectively equipped with bearings fitted onto the rear wheel axle 73.

[0010] The left rear wheel 5 and the right rear wheel 6 are respectively provided above and behind the left half-shaft sleeve 77 and the right half-shaft sleeve 78.

[0011] The axes of the left drive shaft 71 and the right drive shaft 72 are on a straight line.

[0012] like Figure 3 As shown, the transmission device 8 consists of a left driving gear 81, a left double gear 82, a left driven gear 83, a right driving gear 84, a right double gear 85, a right driven gear 86, a left bevel gear 87, a right bevel gear 88, and a reversing bevel gear 89, all housed within the transmission housing 7. The left drive shaft 71, right drive shaft 72, and rear wheel axle 73 are rotatably mounted on the transmission housing 7 via bearings. A one-way transmission 10, which drives the left driving gear 81 forward when the foot pedal 74 of the left steering wheel 75 is depressed, is mounted on the left drive shaft 71. The left driven gear 83 is fixedly mounted on the rear wheel axle 73. The left double gear 82 is rotatably mounted on the transmission housing 7. The pinion of the left double gear 82 meshes with the left driving gear 81. A one-way transmission 10, which meshes with the left driven gear 83 and drives the right driving gear 84 forward when the foot pedal 74 of the right turn 76 is depressed, is mounted on the right drive shaft 72. The right driven gear 86 is fixedly mounted on the rear wheel axle 73. The right double gear 85 is rotatably mounted on the transmission box 7. The pinion of the right double gear 85 meshes with the right driving gear 84, and the large gear meshes with the right driven gear 86. The left bevel gear 87 is fixedly mounted on the right end of the left drive shaft 71, and the right bevel gear 88 is fixedly mounted on the left end of the right drive shaft 72. The reversing bevel gear 89 is rotatably mounted on the transmission box 7 between the left bevel gear 87 and the right bevel gear 88, and meshes with the left bevel gear 87 and the right bevel gear 88 respectively.

[0013] The one-way transmission 10 is a one-way bearing with its inner ring fixedly mounted on the left drive shaft 71 or the right drive shaft 72 and its outer ring fixedly mounted on the left drive gear 81 or the right drive gear 84.

[0014] The one-way drive 10 is a bicycle flywheel with its inner ring fixedly mounted on the left drive shaft 71 or the right drive shaft 72 and its outer ring fixedly mounted on the left drive gear 81 or the right drive gear 84. The ratchet of the bicycle flywheel is located on the outer ring, and the pawl is located on the inner ring. A pawl spring is provided between the pawl and the inner ring. Alternatively, the ratchet is located on the inner ring, the pawl is located on the outer ring, and a pawl spring is provided between the pawl and the outer ring.

[0015] The axes of the left double gear 82 and the right double gear 85 are on a straight line.

[0016] like Figure 4 As shown, the transmission device 8 consists of a left drive sprocket 90, a left driven sprocket 91, a left chain 92, a right drive sprocket 93, a right driven sprocket 94, a right chain 95, a left bevel gear 87, a right bevel gear 88, and a reversing bevel gear 89, all housed within the transmission box. The left drive shaft 71, right drive shaft 72, and rear wheel axle 73 are rotatably mounted on the transmission box 7 via bearings. A one-way transmission 10, which drives the left drive sprocket 90 forward when the foot pedal 74 of the left steering wheel 75 is depressed, is mounted on the left drive shaft 71. The left driven sprocket 91 is fixedly mounted on the rear wheel axle 73, and the left chain 92 is mounted on the left drive sprocket 90. A one-way transmission 10 is installed on the right drive shaft 72 between the left driven sprocket 91 and the right drive sprocket 93. When the right drive sprocket 93 is depressed by the foot pedal 74 of the right turn 76, the right driven sprocket 93 is driven forward. The right driven sprocket 94 is fixedly installed on the rear wheel axle 73. The right chain 95 is installed between the right drive sprocket 93 and the right driven sprocket 94. The left bevel gear 87 is fixedly installed on the right end of the left drive shaft 71. The right bevel gear 88 is fixedly installed on the left end of the right drive shaft 72. The reversing bevel gear 89 is rotatably installed on the transmission box 7 between the left bevel gear 87 and the right bevel gear 88, and meshes with the left bevel gear 87 and the right bevel gear 88 respectively.

[0017] The one-way transmission 10 is a one-way bearing with its inner ring fixedly mounted on the left drive shaft 71 or the right drive shaft 72 and its outer ring fixedly mounted on the left drive sprocket 90 or the right drive sprocket 93.

[0018] The one-way drive 10 is a bicycle freewheel with its inner ring fixedly mounted on the left drive shaft 71 or the right drive shaft 72 and its outer ring fixedly mounted on the left drive sprocket 90 or the right drive sprocket 93. The bicycle freewheel has ratchet teeth on the outer ring and pawls on the inner ring, with a pawl spring between the pawl and the inner ring. Alternatively, the ratchet teeth can be on the inner ring and the pawls on the outer ring, with a pawl spring between the pawl and the outer ring.

[0019] like Figure 1As shown, the foot pedal self-leveling device 9 consists of a left steering wheel 75 or a right steering wheel 76, a foot pedal 74, and a connecting rod 96. The foot pedal 74 is provided with a pedal arm 79 perpendicular to the foot surface of the foot pedal 74. The upper end of the pedal arm 79 is fixedly connected to the foot pedal 74. The foot pedal 74 is hinged to the free end of the left steering wheel 75 or the right steering wheel 76 above the upper end of the pedal arm 79. One end of the connecting rod 96 is hinged to the lower end of the pedal arm 79, and the other end is hinged to the transmission box 7 below the left drive shaft 71 or the right drive shaft 72. Alternatively, the lower end of the pedal arm 79 is fixedly connected to the foot pedal 74, and the foot pedal 74 is hinged to the free end of the left steering wheel 75 or the right steering wheel 76 below the lower end of the pedal arm 79. One end of the connecting rod 96 is hinged to the upper end of the pedal arm 79, and the other end is hinged to the transmission box 7 above the left drive shaft 71 or the right drive shaft 72. The left steering wheel 75 or right steering wheel 76, pedal arm 79, connecting rod 96 and transmission box 7 form a four-bar linkage mechanism, so that when the foot pedal 74 of the left steering wheel 75 or right steering wheel 76 rises and falls, the foot surface of the foot pedal 74 is always parallel to the ground.

[0020] like Figure 2 As shown, the foot pedal self-leveling device 9 consists of a left steering wheel 75 or a right steering wheel 76, a foot pedal 74, a pedal gear 80, an odd number of intermediate gears 97, and a fixed gear 98. The pedal gear 80 is coaxially fixedly mounted on the foot pedal 74 with the rotating shaft mounted on the steering wheel. The fixed gear 98 is coaxially fixedly mounted on the transmission box 7 with the left drive shaft 71 or the right drive shaft 72. Each intermediate gear 97 is sequentially rotated and mounted on the left steering wheel 75 or the right steering wheel 76 along the extension direction of the left steering wheel 75 or the right steering wheel 76, and each adjacent intermediate gear 97 meshes with each other. The pedal gear 80 and the fixed gear 98 mesh with the adjacent intermediate gear 97 respectively. When the foot pedal 74 of the left steering wheel 75 or the right steering wheel 76 rises and falls, under the meshing action of the fixed gear 98 fixed on the transmission box 7, each intermediate gear 97 and the pedal gear 80 cooperate to rotate, causing the foot pedal 74 to flip on the left steering wheel 75 or the right steering wheel 76, so that the foot surface of the foot pedal 74 is always parallel to the ground.

[0021] The pedal gear 80, each intermediate gear 97 and the fixed gear 98 are provided with teeth on their outer periphery, or the pedal gear 80, each intermediate gear 97 and the fixed gear 98 are provided with a number of teeth only at the positions where they mesh with each other.

[0022] The pedal gear 80, each intermediate gear 97 and the fixed gear 98 have the same position radius of the teeth, and the transmission ratio between each gear is 1:1.

[0023] Each foot pedal 74 has anti-slip raised edges 99 on both the left and right sides, which are higher than the foot surface. The hinge between the foot pedal 74 and the left or right steering wheel 75 or right steering wheel 76 is located in the middle and rear part of the foot pedal 74, so that the rider can use the middle and rear part of the foot to pedal and exert force, and can balance the force on the foot pedal 74, preventing the foot pedal self-leveling device 9 from being damaged by excessive force.

[0024] Working principle: When riding, the cyclist stands upright with both feet on the pedals 74 of the left and right stalks 75 and 76 respectively, and hands on the handlebars 3 to steer.

[0025] like Figure 3 The drive mechanism shown is as follows: When the rider presses down on the left pedal with their left foot, the left bevel gear drives the left drive gear forward via a one-way transmission. The left drive gear drives the left double gear backward, and the left double gear drives the left and right rear wheels forward via the left driven gear and the rear wheel axle, propelling the bicycle forward. Simultaneously, the left bevel gear on the left bevel gear drives the right bevel gear backward via a reversing bevel gear, which in turn drives the right pedal upward via the right bevel gear. Because there is a one-way transmission between the right drive gear and the right drive shaft, the right drive shaft does not drive the right drive gear backward; instead, the right drive gear is driven forward by the right driven gear and the right double gear. When the left pedal is pressed down to its lowest point, the rider switches to pressing down on the right pedal with their right foot. The right bevel gear drives the right drive gear forward via a one-way transmission. The right drive gear drives the right double gear backward, and the right double gear drives the left and right rear wheels forward via the right driven gear and the rear wheel axle, propelling the bicycle forward. At the same time, the foot pedal on the left turn swings upward, and the left drive gear is driven forward by the left driven gear and the left double gear.

[0026] like Figure 4The drive mechanism shown is as follows: When the rider presses down on the left pedal with their left foot, the left sprocket drives the left drive sprocket forward via a one-way transmission. The left drive sprocket then drives the left driven sprocket forward via the left chain, causing the left and right rear wheels on the rear axle to rotate forward, propelling the bicycle forward. Simultaneously, the left bevel gear on the left drive axle drives the right bevel gear backward via a reversing bevel gear, causing the right pedal to swing upward via the right sprocket. Because there is a one-way transmission between the right drive sprocket and the right drive axle, the right drive axle does not drive the right drive sprocket backward; instead, the right drive sprocket is driven forward by the right driven sprocket and the right chain. When the left pedal is pressed down to its lowest point, the rider presses down on the right pedal with their right foot. The right sprocket drives the right drive sprocket forward via a one-way transmission. The right drive sprocket then drives the right driven sprocket forward via the right chain, causing the left and right rear wheels on the rear axle to rotate forward, propelling the bicycle forward. At the same time, it causes the foot pedal on the left turn to swing upward, and the left drive sprocket is driven forward by the left driven sprocket and the left chain.

[0027] By alternating between pressing down on the left and right pedals with their left and right feet, cyclists can drive the left and right rear wheels of the bicycle to rotate forward continuously, thus using their own weight to propel the bicycle forward quickly while standing.

[0028] The self-leveling mechanism of the pedals ensures that the pedal surface is always parallel to the ground. This improves the stability of the pedals when mounted on the left and right turn signals, makes pedaling smoother, and facilitates better power delivery. It also reduces foot fatigue when standing on the pedals, enhancing riding comfort.

Claims

1. A standing-riding, reciprocating pedal self-leveling, dual-wheel drive tricycle, comprising a frame (1), a front fork (2), handlebars (3), a front wheel (4), a left rear wheel (5), and a right rear wheel (6), wherein the upper part of the front fork (2) is rotatably mounted in the head tube (11) at the front of the frame (1), the front wheel (4) is rotatably mounted on the front fork (2), and the lower end of the handlebar (3) post is connected to the front fork (2), characterized in that: The rear of the frame (1) is provided with a transmission box (7). The transmission box (7) is rotatably mounted with a left drive shaft (71), a right drive shaft (72) and a rear wheel axle (73) connected by a transmission device (8). The left end of the left drive shaft (71) extends outside the transmission box (7) and is laterally provided with a left steering wheel (75) with the other end facing the front of the frame (1) and equipped with a foot pedal (74). The right end of the right drive shaft (72) extends outside the transmission box (7) and is laterally provided with a foot pedal (74) with the other end facing the front of the frame (1). The right turn (76) and the left and right ends of the rear wheel axle (73) extend to the outside of the transmission box (7) and are fixedly connected to the left rear wheel (5) and the right rear wheel (6) respectively. When the foot pedals (74) on the left turn (75) and the right turn (76) are alternately pressed down, they drive the left rear wheel (5) and the right rear wheel (6) to rotate forward and drive the foot pedals (74) on the opposite turn to rise. The left and right sides of the transmission box (7) are respectively provided with foot pedal self-leveling devices (9) to keep the foot surface of the foot pedal (74) parallel to the ground.

2. The three-wheeled bicycle with self-leveling dual-wheel drive after reciprocating pedal operation as described in claim 1, characterized in that... The transmission box (7) has a left half-shaft sleeve (77) and a right half-shaft sleeve (78) respectively fitted on the outside of the rear wheel axle (73). The right end of the left half-shaft sleeve (77) and the left end of the right half-shaft sleeve (78) are respectively fixed on the housing of the transmission box (7). The left end of the left half-shaft sleeve (77) and the right end of the right half-shaft sleeve (78) are respectively fitted with bearings fitted on the rear wheel axle (73).

3. The three-wheeled bicycle with self-leveling dual-wheel drive after reciprocating pedal operation as described in claim 1, characterized in that... The axes of the left drive shaft (71) and the right drive shaft (72) are located on a straight line.

4. The three-wheeled bicycle with self-leveling dual-wheel drive after reciprocating pedal operation as described in claim 1, characterized in that... The transmission device (8) consists of a left driving gear (81), a left double gear (82), a left driven gear (83), a right driving gear (84), a right double gear (85), a right driven gear (86), a left bevel gear (87), a right bevel gear (88), and a reversing bevel gear (89) located in the transmission box (7). The left drive shaft (71), the right drive shaft (72), and the rear wheel axle (73) are rotatably mounted on the transmission box (7) via bearings. The left driving gear (81) is driven forward by a one-way transmission device (10) that drives the left driving gear (81) to rotate forward when the foot pedal (74) of the left steering wheel (75) is depressed. The left driven gear (83) is fixedly mounted on the rear wheel axle (73). The left double gear (82) is rotatably mounted on the transmission box (7). The pinion of the left double gear (82) meshes with the left driving gear (81). The large gear meshes with the left driven gear (83), and the right driving gear (84) is driven forward by the foot pedal (74) of the right wheel (76) when it is depressed. The one-way transmission (10) is installed on the right drive shaft (72), the right driven gear (86) is fixedly installed on the rear wheel axle (73), the right double gear (85) is rotatably installed on the transmission box (7), the small gear of the right double gear (85) meshes with the right driving gear (84), and the large gear meshes with the right driven gear (86). The left bevel gear (87) is fixedly installed on the right end of the left drive shaft (71), the right bevel gear (88) is fixedly installed on the left end of the right drive shaft (72), and the reversing bevel gear (89) is rotatably installed on the transmission box (7) between the left bevel gear (87) and the right bevel gear (88), and meshes with the left bevel gear (87) and the right bevel gear (88) respectively.

5. The dual-wheel drive tricycle with self-leveling pedals after reciprocating pedaling as described in claim 4, characterized in that... The one-way transmission (10) is a one-way bearing with its inner ring fixedly mounted on the left drive shaft (71) or the right drive shaft (72) and its outer ring fixedly mounted on the left drive gear (81) or the right drive gear (84). Alternatively, the one-way transmission (10) may be a bicycle flywheel with its inner ring fixedly mounted on the left drive shaft (71) or the right drive shaft (72) and its outer ring fixedly mounted on the left drive gear (81) or the right drive gear (84). The ratchet of the bicycle flywheel is located on the outer ring, and the pawl is located on the inner ring. A pawl spring is provided between the pawl and the inner ring. Alternatively, the ratchet is located on the inner ring, and the pawl is located on the outer ring. A pawl spring is provided between the pawl and the outer ring.

6. The dual-wheel drive tricycle with self-leveling pedals after reciprocating pedal movement as described in claim 4, characterized in that... The axes of the left double gear (82) and the right double gear (85) are located on a straight line.

7. The dual-wheel drive tricycle with self-leveling pedals after reciprocating pedaling as described in claim 1, characterized in that... The transmission device (8) consists of a left drive sprocket (90), a left driven sprocket (91), a left chain (92), a right drive sprocket (93), a right driven sprocket (94), a right chain (95), a left bevel gear (87), a right bevel gear (88), and a reversing bevel gear (89) located in the transmission box. The left drive shaft (71), the right drive shaft (72), and the rear wheel axle (73) are rotatably mounted on the transmission box (7) via bearings. The left drive sprocket (90) is driven forward by a one-way transmission device (10) that drives the left drive sprocket (90) to rotate forward when the foot pedal (74) of the left steering wheel (75) is depressed. The left driven sprocket (91) is fixedly mounted on the rear wheel axle (73). The left chain (92) is mounted on the left drive sprocket (99). A one-way transmission (10) is installed on the right drive shaft (72) between the right drive sprocket (93) and the left driven sprocket (91). When the right drive sprocket (93) is depressed by the foot pedal (74) of the right wheel (76), the right driven sprocket (94) is fixedly installed on the rear wheel axle (73). The right chain (95) is installed between the right drive sprocket (93) and the right driven sprocket (94). The left bevel gear (87) is fixedly installed on the right end of the left drive shaft (71). The right bevel gear (88) is fixedly installed on the left end of the right drive shaft (72). The reversing bevel gear (89) is rotatably installed on the transmission box (7) between the left bevel gear (87) and the right bevel gear (88), and meshes with the left bevel gear (87) and the right bevel gear (88) respectively.

8. The dual-wheel drive tricycle with self-leveling pedals after reciprocating pedal movement as described in claim 7, characterized in that... The one-way transmission (10) is a one-way bearing with its inner ring fixedly mounted on the left drive shaft (71) or the right drive shaft (72) and its outer ring fixedly mounted on the left drive sprocket (90) or the right drive sprocket (93). Alternatively, the one-way transmission (10) may be a bicycle flywheel with its inner ring fixedly mounted on the left drive shaft (71) or the right drive shaft (72) and its outer ring fixedly mounted on the left drive sprocket (90) or the right drive sprocket (93). The ratchet of the bicycle flywheel is located on the outer ring, and the pawl is located on the inner ring. A pawl spring is provided between the pawl and the inner ring. Alternatively, the ratchet is located on the inner ring, and the pawl is located on the outer ring. A pawl spring is provided between the pawl and the outer ring.

9. The dual-wheel drive tricycle with self-leveling pedals after reciprocating pedaling as described in claim 1, characterized in that... The foot pedal self-leveling device (9) consists of a left steering wheel (75) or a right steering wheel (76), a foot pedal (74), and a connecting rod (96). The foot pedal (74) is provided with a pedal arm (79) perpendicular to the foot surface of the foot pedal (74). The upper end of the pedal arm (79) is fixedly connected to the foot pedal (74). The foot pedal (74) is hinged to the free end of the left steering wheel (75) or the right steering wheel (76) above the upper end of the pedal arm (79). One end of the connecting rod (96) is connected to the lower end of the pedal arm (79). One end is hinged to the other end, which is hinged to the transmission box (7) below the left drive shaft (71) or the right drive shaft (72); or the lower end of the pedal arm (79) is fixedly connected to the foot pedal (74), which is hinged to the free end of the left steering wheel (75) or the right steering wheel (76) below the lower end of the pedal arm (79), and one end of the connecting rod (96) is hinged to the upper end of the pedal arm (79), while the other end is hinged to the transmission box (7) above the left drive shaft (71) or the right drive shaft (72).

10. The dual-wheel drive tricycle with self-leveling pedals after reciprocating pedaling as described in claim 1, characterized in that... The foot pedal self-leveling device (9) consists of a left turn (75) or a right turn (76), a foot pedal (74), a pedal gear (80), an odd number of intermediate gears (97) and a fixed gear (98). The pedal gear (80) is coaxially fixedly mounted on the foot pedal (74) with the rotating shaft of the foot pedal (74) mounted on the turn. The fixed gear (98) is coaxially fixedly mounted on the transmission box (7) with the left drive shaft (71) or the right drive shaft (72). Each intermediate gear (97) is sequentially rotated and mounted on the left turn (75) or the right turn (76) along the extension direction of the left turn (75) or the right turn (76), and each adjacent intermediate gear (97) meshes with each other. The pedal gear (80) and the fixed gear (98) mesh with the adjacent intermediate gear (97).

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