Bicycle dual front wheel system

Abstract

The invention discloses a double front wheel system for a bicycle. The system comprises a steering shaft connected to the upper end surface of a torsion bar spring seat, the steering shaft is installed in a bearing on a bicycle body, the left and right end surfaces of the torsion bar spring seat are respectively connected to the left and right steering handlebars, and the left and right end surfaces and the lower end surface of the torsion bar spring seat are connected to a support plate. The torsion bar spring seat is provided with two torsion bar spring shaft holes, each of which is respectively installed with a torsion bar spring shaft, and each of the two torsion bar spring shafts is respectively installed with a rocker arm, and each of the two rocker arms is respectively connected with a front wheel, so that when the bicycle travels on an uneven road surface, each front wheel can jump independently, making the riding more stable, more comfortable and safer. Each rocker arm is installed with a support rod, two support shafts and two support bearings, and the support plate is sandwiched between the two support bearings, so as to limit the rocker arm from swinging forward and backward in a direction perpendicular to the plane of the up and down swing.

Description

Technical Field

[0001] The invention relates to a bicycle double front wheel system which can make the bicycle more stable and safer when traveling on uneven roads. Background Art

[0002] As we all know, there are two main types of common dual front wheel bicycles. The first type is: the two front wheels are coaxial, but the disadvantage is that when driving on a flat road, the driver is subjected to a large vibration impact, the center of gravity swings greatly on both sides, and the comfort is poor. The second type is: the axles of the two front wheels can move independently, but the disadvantage is that the elastic buffer system has a complex structure, high cost, and the elasticity cannot be adjusted. Summary of the invention

[0003] In order to improve the comfort of the rider, make the dual front wheel system simple in structure, low in manufacturing cost, and also be used as a cart; the present invention provides a dual front wheel system for a bicycle, which can make the two front wheels of the bicycle move up and down independently when traveling on an uneven road surface without affecting each other, thereby reducing the impact and tilt of the bicycle body, improving the riding comfort, lowering the center of gravity and thus improving the riding stability; and after being separated from the bicycle body, the system can be used as a cart.

[0004] The technical solution adopted by the present invention to solve its technical problem is that the bicycle double front wheel system consists of a torsion bar spring seat, a steering shaft, left and right steering handles, a hanging rack, a support plate, two bearings, two torsion bar spring shafts, two nuts, two rocker arms, two sets of bolts, nuts, two front wheels, two support rods, two support rod nuts, four support shafts, four support shaft nuts, and four support bearings; two torsion bar spring shaft holes are arranged on the torsion bar spring seat, and the torsion bar spring seat is connected to the steering shaft, the support plate, and the left and right steering handles; a bearing is installed in each torsion bar spring shaft hole, and the torsion bar spring shaft is installed in the bearing and the torsion bar spring shaft hole, and is fixed to the torsion bar spring seat with a nut; the spline hole arranged on the rotating end of the rocker arm can be installed on the spline shaft of the torsion bar spring, and the rotating end of the rocker arm shaft is fastened to the spline shaft of the torsion bar spring with bolts and nuts, and the elastic force and the vehicle body can also be adjusted by changing the installation position of the spline hole and the spline shaft. height, the positioning hole arranged on the rocker arm is used to install the support rod, and a front wheel shaft is connected to the swing end of the rocker arm; a bearing seat is arranged on the steering shaft; the bicycle double front wheel system is installed on the bicycle body through the steering shaft, and after installation, the steering shaft forms an angle β with the body, and the angle β is less than 90°; two support shaft holes are arranged on the support rod, and the support rod is installed on the rocker arm and fixed with a support rod nut; two support bearings are respectively installed on the two support shafts, and the two support shafts are respectively installed in the two support shaft holes on the support rod, and the two support shaft nuts fasten the two support shafts to the support rod respectively; the two bearings are of the same size and can be replaced with each other; the nuts are of the same size and can be replaced with each other; the rocker arms are of the same size and can be replaced with each other; the two front wheels are of the same size and can be replaced with each other; the two support rods are of exactly the same size and can be replaced with each other; the four support shafts are of the same size and can be replaced with each other; the four support bearings are of the same size and can be replaced with each other.

[0005] The advantages of the present invention are that the two front wheels of the bicycle can move up and down independently when traveling on an uneven road surface without affecting each other, thereby reducing the impact and tilt of the bicycle body, improving riding comfort, lowering the center of gravity and thus improving riding stability; the elastic buffer strength can be adjusted, the height of the bicycle body can be adjusted, the structure is simple, and the manufacturing cost is low; after the bicycle double front wheel system is separated from the bicycle, it can also be transformed into a cart. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0007] Figure 1 It is a schematic diagram of the overall structure of a double front wheel bicycle of the present invention.

[0008] Figure 2 It is a schematic cross-sectional view of the torsion bar spring seat of the present invention cut along the center line of the first torsion bar spring shaft hole and the first bearing, and a schematic view of the relative position relationship between the steering shaft and the vehicle body.

[0009] Figure 3 It is a cross-sectional schematic diagram of the torsion bar spring seat of the present invention cut along the center line of the second torsion bar spring shaft hole and the second bearing.

[0010] Figure 4 It is a schematic structural diagram of the first torsion bar spring shaft of the present invention.

[0011] Figure 5 It is a schematic structural diagram of the second torsion bar spring shaft of the present invention.

[0012] Figure 6 It is a structural schematic diagram of the front end surface of the torsion bar spring seat of the present invention.

[0013] Figure 7 It is a structural schematic diagram of the rear end surface of the torsion bar spring seat of the present invention.

[0014] Figure 8 It is a structural schematic diagram of the first rocker arm of the present invention.

[0015] Fig. 9 It is a structural schematic diagram of the second rocker arm of the present invention.

[0016] Fig.10 It is a schematic diagram of the cross-sectional structure of the present invention cut along the center line of the first torsion bar spring shaft hole.

[0017] Fig.11 It is a schematic diagram of the cross-sectional structure of the present invention cut along the center line of the second torsion bar spring shaft hole.

[0018] Fig.12 It is a cross-sectional schematic diagram of the present invention cut along the center line of the first torsion bar spring shaft hole and the second torsion bar spring shaft hole.

[0019] Fig.13 It is a schematic diagram of the relative position relationship of the first rocker arm, the first support rod, the second support shaft, the first support bearing, the second support shaft, the second support bearing, the support plate, and the support plate flange of the present invention.

[0020] Fig.14 It is a schematic diagram of the relative position relationship of the second rocker arm, the second support rod, the third support shaft, the third support bearing, the fourth support shaft, the fourth support bearing, the support plate, and the support plate flange of the present invention.

[0021] Fig.15 The present invention is a schematic diagram of the relative position relationship of the torsion bar spring seat, the steering shaft, the left and right steering handles, and the support plate.

[0022] Fig.16 It is a schematic structural diagram of the first support shaft of the present invention.

[0023] In the figure, 1. left and right steering handles, 2. vehicle body, 3. steering shaft, 7. torsion bar spring seat, 8. first torsion bar spring shaft hole, 9. second torsion bar spring shaft hole, 10. hanging rack, 11. first nut, 12. second nut, 13. first bolt and nut, 14. second bolt and nut, 31. bearing seat, 32. support plate, 33. support plate flange, 34. connecting section, 35. first arc section, 36. second arc section, 41. first front wheel, 42. second front wheel, 50. second support rod hole, 51. first rocker arm, 52. second rocker arm , 53. The first front wheel axle, 54. The second front wheel axle, 55. The first bolt hole, 56. The second bolt hole, 57, the first spline hole, 58. The second spline hole, 59, the first support rod hole, 60. The second shoulder, 61. The first torsion bar spring shaft, 62, the second torsion bar spring shaft, 63. The first collar, 64. The second collar, 65. The first spline shaft, 66. The second spline shaft, 67. The first screw rod, 68. The second screw rod, 69. The first shoulder, 71. The front end face, 72. The rear end face, 73, the first torsion bar spring hole, 74 the second torsion bar spring hole, 75. First bearing hole, 76. Second bearing hole, 77. Square table hole, 78. Hexagonal table hole, 81. First bearing, 82. Second bearing, 83. First bearing hole, 84. Second bearing hole, 93. First torsion bar spring hole, 94. Second torsion bar spring hole, 95. Square table, 96. Hexagonal table, 511. First support rod, 512. First link, 513. Third screw rod, 514. First support rod nut, 515. First support shaft, 516. Second support shaft, 517. First support bearing, 518. Second support bearing, 52 1. The second support rod, 522. The second link, 523. The fourth screw, 524. The second support rod nut, 525. The third support shaft, 526. The fourth support shaft, 527. The third support bearing, 528. The fourth support bearing, 531. The flange, 532. The shoulder, 533. The shaft, 534. The shaft head screw, 535. The first support shaft nut, 541. The first support shaft hole, 542. The second support shaft hole, 543. The third support shaft hole, 544. The fourth support shaft hole, 611. The first torsion bar spring, 622. The second torsion bar spring. DETAILED DESCRIPTION

[0024] exist Figure 1In the invention, a bearing seat (31) is provided on a steering shaft (3), the steering shaft (3) is installed in a vehicle body (2), the vehicle body (2) is pressed on the bearing seat (31), the steering shaft (3) is connected to the upper end surface of a torsion bar spring seat (7); the left and right end surfaces of the torsion bar spring seat (7) are connected to the left and right steering handles (1), the support plate (32) is connected to the torsion bar spring seat (7); a first torsion bar spring shaft (61) and a second torsion bar spring shaft are installed on the torsion bar spring seat (7) (62); the rotating end of the first rocker arm (51) is connected to the first torsion bar spring shaft (61), and the swinging end of the first rocker arm (51) is connected to the axle of the first front wheel (41); the rotating end of the second rocker arm (52) is connected to the second torsion bar spring shaft (62), and the swinging end of the second rocker arm (52) is connected to the axle of the second front wheel (42); the object hanging rack (10) is installed on the left and right steering handles (1), and the object hanging rack (10) has no limited shape.

[0025] exist Figure 2 In the embodiment, the steering shaft (3) is installed in the bearing of the vehicle body (2), and the steering shaft (3) and the vehicle body (2) form an angle β, and the angle β is less than 90°; a cross-section of the torsion bar spring seat (7) cut along the center line of the first torsion bar spring shaft hole (8) and the first bearing (81) (which can be a rolling shaft or a sliding bearing) shows that the first bearing (81) is installed in the first torsion bar spring shaft hole (8), the first torsion bar spring shaft (61) is installed in the first torsion bar spring shaft hole (8) and the first bearing (81), and the first torsion bar spring shaft (61) is installed in the first torsion bar spring shaft hole (8) and the first bearing (81). 1) is inserted into the square platform hole (77), and the first nut (11) is tightened with the screw rod (67) to fix the square platform (95) in the square platform hole (77) so that it cannot move; the first bolt (13) fastens the rotating end of the first rocker arm (51) to the first spline shaft (65), and the swinging end of the first rocker arm (51) is connected to the first front wheel shaft (53) of the first front wheel (41); the support plate (32) is connected to the front end surface (71) of the torsion bar spring seat (7), and the edge is a flange (33).

[0026] exist Figure 3 In the embodiment, a cross section of the torsion bar spring seat (7) cut along the center line of the second torsion bar spring shaft hole (9) and the second bearing (82) (which can be a rolling shaft or a sliding bearing) shows that the second bearing (82) is installed in the second torsion bar spring shaft hole (9), the second torsion bar spring shaft (62) is installed in the second torsion bar spring shaft hole (9) and the second bearing (82), the hexagonal table (96) on the second torsion bar spring shaft (62) is inserted into the hexagonal table hole (78), and the second nut (12) is tightened with the second screw rod (68) to fix the hexagonal table (96) in the hexagonal table hole (78) so that it cannot move; the second bolt (14) locks the rotating end of the second rocker arm (52) on the second spline shaft (66), and the swinging end of the second rocker arm (52) is connected to the second front wheel shaft (54) of the second front wheel (42).

[0027] exist Figure 4 In the invention, a first screw rod (67), a square platform (95), a first torsion bar spring (611), a first shaft shoulder (69), a first shaft ring (63), and a first spline shaft (65) are provided on the first torsion bar spring shaft (61); the bottom of the square platform (95) is connected to the first torsion bar spring (611), the top of the square platform (95) is connected to the first screw rod (67), the height of the square platform (95) is h1, and h1

[0028] exist Figure 5 In the invention, a second torsion bar spring shaft (62) is provided with a second screw rod (68), a hexagonal platform (96), a second torsion bar spring (622), a second shaft shoulder (60), a second shaft ring (64), and a second spline shaft (666); the bottom of the hexagonal platform (96) is connected to the second torsion bar spring (622), the top of the hexagonal platform (96) is connected to the second screw rod (68), the height of the hexagonal platform (96) is h2, and h2<H2, the bottom side length of the hexagonal platform (96) is h5, the top side length of the hexagonal platform (96) is h6, and H6<h6<H5<h5.

[0029] exist Figure 6 In the diagram, the front end face (71) of the torsion bar spring seat (7) shows that the first torsion bar spring shaft hole (8) and the second torsion bar spring shaft hole (9) are symmetrically arranged on both sides of the first torsion bar spring shaft structural schematic diagram of the steering shaft (3) and the center axis of the torsion bar spring seat (7).

[0030] exist Figure 7 In the figure, the rear end face (72) of the torsion bar spring seat (7) shows that the square table hole (77) and the hexagonal table hole (78) are symmetrically arranged on both sides of the central axis of the steering shaft (3) and the torsion bar spring seat (7).

[0031] exist Figure 8 In the invention, a first rocker arm (51) is provided with a first spline hole (57) in an open loop state and a first bolt hole (55) of a two-stage type. The swing end of the first rocker arm (51) is connected to a first front wheel shaft (53) of a first front wheel (41). A first bolt and a nut (13) installed in the first bolt hole (55) can fasten the first rocker arm (51) to the first spline shaft (65). The first rocker arm (51) is also provided with a first support rod hole (59) for installing a first support rod (511).

[0032] exist Fig. 9 ​In the invention, a second rocker arm (52) is provided with a second spline hole (58) in an open loop state and a second bolt hole (56) of a two-stage type. The swing end of the second rocker arm (52) is connected to a second front wheel shaft (54) of a second front wheel (42). A second bolt and a nut (14) installed in the second bolt hole (56) can fasten the second rocker arm (52) to the second spline shaft (66). The second rocker arm (52) is also provided with a second support rod hole (50) for installing a second support rod (521).

[0033] exist Fig.10 In the embodiment, a cross section cut along the center line of the first torsion bar spring shaft hole (8) shows that the first torsion bar spring shaft hole (8) is composed of a first bearing hole (83), a first torsion bar spring hole (93), and a square platform hole (77); the bottom of the square platform hole (77) is connected to the first torsion bar spring shaft hole (8), the length of the square platform hole (77) is H1, and h1

[0034] exist Fig.11 In the embodiment, a cross section cut along the center line of the second torsion bar spring shaft hole (9) shows that the second torsion bar spring shaft hole (9) is composed of a second bearing hole (84), a second torsion bar spring hole (94), and a hexagonal table hole (78); the bottom of the hexagonal table hole (78) is connected to the second torsion bar spring hole (94), the length of the hexagonal table hole (78) is H2, and h2<H2, the side length of the bottom of the hexagonal table hole (78) is H5, and the side length of the top of the hexagonal table hole (78) is H6, and H6<h6<H5<h5.

[0035] exist Fig.12 In the embodiment, a cross section cut along the center line of the first torsion bar spring shaft hole (8) and the second torsion bar spring shaft hole (9) shows that the center point distance between the first torsion bar spring shaft hole (8) and the second torsion bar spring shaft hole (9) at the front end surface (71) is h7, and the center point distance between the first torsion bar spring shaft hole (8) and the second torsion bar spring shaft hole (9) at the rear end surface (72) is H7, and h7≤H7.

[0036] exist Fig.13 ​In the invention, a first link (512), a third screw rod (513), a first support shaft hole (541), and a second support shaft hole (542) are provided on the first support rod (511); the first support rod (511) is installed in the first support rod hole (59) and fixed by a first support rod nut (514); the first support bearing (517) is installed on the first support shaft (515), the first support shaft (515) is installed in the first support shaft hole (541) on the first support rod (511), and fixed by a first support shaft nut (535); the second support bearing (518) is installed on the second support shaft (516), the second support shaft (516) is installed in the second support shaft hole (542) on the first support rod (511), and fixed by a second support shaft nut; the first arc segment (35) of the support plate (32) is clamped between the first support bearing (517) and the second support bearing (518).

[0037] exist Fig.14 In the embodiment, the second support rod (521) is provided with a second link (522), a fourth screw rod (523), a third support shaft hole (543), and a fourth support shaft hole (544); the second support rod (521) is installed in the second support rod hole (50) and fixed by a second support rod nut (524); the third support bearing (527) is installed on the third support shaft (525), and the third support shaft (525) is installed in the third support shaft hole (543) on the second support rod (521) and fixed by a third support shaft nut; the fourth support bearing (528) is installed on the fourth support shaft (526), ​​and the fourth support shaft (526) is installed in the fourth support shaft hole (544) on the second support rod (521) and fixed by a fourth support shaft nut; the second arc segment (36) of the support plate (32) is clamped between the third support bearing (527) and the fourth support bearing (528).

[0038] exist Fig.15 In the invention, the upper end surface of the torsion bar spring seat (7) is connected to the steering shaft (3); the left and right end surfaces are respectively connected to the left and right steering handles (1); the left and right end surfaces and the lower end surface are connected to the support plate (32). The support plate (32) is composed of a first arc segment (35), a connecting segment (34), and a second arc segment (36); the distances from each point of the arc edge on the same plane of the first arc segment (35) to the center line of the first torsion bar spring hole (8) are the same; the distances from each point of the arc edge on the same plane of the second arc segment (36) to the center line of the second torsion bar spring hole (9) are the same.

[0039] exist Fig.16In the embodiment, a flange (531), a shoulder (532), a shaft (533), and a shaft head screw (534) are provided on the first support shaft (515); the shoulder can be used to install the bearing (517), the shaft (533) can be used to be inserted into the first support shaft hole (541), and the first support shaft nut (535) can be used to fasten the first support shaft (515) in the first support shaft hole (541) on the first support rod (511). The size of the first support shaft (515) is exactly the same as the size of the second support shaft (516), the third support shaft (525), and the fourth support shaft (526) described herein, and they can be replaced with each other; the size of the first support shaft nut (535) is exactly the same as the size of the second support shaft nut, the third support shaft nut, and the fourth support shaft nut described herein, and they can be replaced with each other.

[0040] 1. The size of the first rocker arm (51) is exactly the same as the size of the second rocker arm (52), and they can be replaced with each other; the size of the first front wheel (41) is exactly the same as the size of the second front wheel (42), and they can be replaced with each other; when the first front wheel (41) is a DC motor driven wheel and the second front wheel (42) is a DC motor driven wheel, the first front wheel (41) and the second front wheel (42) can also be replaced with each other; the size of the first nut (11) is exactly the same as the size of the second nut (12), and they can be replaced with each other; the size of the first support rod (511) is exactly the same as the size of the second support rod (521), and they can be replaced with each other ; The size of the first support shaft (515), the size of the second support shaft (516), the size of the third support shaft (525), and the size of the fourth support shaft (526) are all the same and can be replaced with each other; the size of the first support shaft nut (535), the size of the second support shaft nut, the size of the third support shaft nut, and the size of the fourth support shaft nut are all the same and can be replaced with each other; the size of the first support bearing (517), the size of the second support bearing (518), the size of the third support bearing (527), and the size of the fourth support bearing (528) are all the same and can be replaced with each other.

[0041] 2. The left and right steering handles (1) are respectively connected to the left and right end surfaces of the torsion bar spring seat (7) below the vehicle body (2) to limit the rotation angle of the steering shaft (3) to prevent various connecting pipelines from being damaged; when driving on uneven roads, the first front wheel (41) and the second front wheel (42) can jump independently.

[0042] 3. The object hanging rack (10) is not limited in shape, and the object hanging rack (10) is installed on the left and right steering handlebars (1); after the steering shaft (3) is separated from the vehicle body (2), the bicycle double front wheel system is a two-wheeled human-powered cart; when the first front wheel (41) is a DC motor driven wheel and the second front wheel (42) is a DC motor driven wheel, after the steering shaft (3) is separated from the vehicle body (2), the bicycle double front wheel system is a two-wheeled human-powered and electric cart.

[0043] 4. When the first rocker arm (51) is pressed to swing up and down, it drives the first support rod (511), the first support shaft (515), the second support shaft (516), the first support bearing (517), and the second support bearing (518) to swing up and down at the same time. During the up and down swinging process, the first arc segment (35) of the support plate (32) is clamped by the first support bearing (517) and the second support bearing (518), and the first support bearing (517) and the second support bearing (518) roll on the front and back surfaces of the first arc segment (35) of the support plate (32), respectively, which not only limits the first rocker arm (51) from swinging in a direction perpendicular to the plane of the up and down swinging, but also minimizes the interference with the up and down swinging of the first rocker arm (51).

[0044] 5. When the second rocker arm (52) is pressed to swing up and down, it drives the second support rod (521), the third support shaft (525), the fourth support shaft (526), ​​the third support bearing (527), and the fourth support bearing (528) to swing up and down at the same time. During the up and down swinging process, the second arc segment (36) of the support plate (32) is clamped by the third support bearing (527) and the fourth support bearing (528), and the third support bearing (527) and the fourth support bearing (528) roll on the front and back surfaces of the second arc segment (36) of the support plate (32), respectively, which not only limits the second rocker arm (52) from swinging in a direction perpendicular to the plane of the up and down swinging, but also minimizes the interference with the up and down swinging of the second rocker arm (52).

Claims

1. A bicycle dual front wheel system, wherein the upper end surface of a torsion bar spring seat of the system is connected to a steering shaft, the left and right end surfaces of the torsion bar spring seat are respectively connected to a left and right steering handlebar, and the left and right end surfaces and the lower end surface of the torsion bar spring seat are connected to a support plate; the torsion bar spring seat is provided with two torsion bar spring shaft holes, which are respectively installed with a first bearing, a first torsion bar spring shaft, and a second bearing, and a second torsion bar spring shaft, and the first torsion bar spring shaft and the second torsion bar spring shaft are respectively fixed to the torsion bar spring seat with a first nut and a second nut; the rotating end of the first rocker arm is fastened and installed on the first spline shaft of the first torsion bar spring with a first bolt and a nut, the swinging end of the first rocker arm is connected to the first front wheel, the first support rod is installed on the first rocker arm, and the first support bearing is installed on the first support shaft The first support shaft is mounted on the first support rod, the second support bearing is mounted on the second support shaft, the second support shaft is mounted on the first support rod, and the support plate is clamped between the first support bearing and the second support bearing; the rotating end of the second rocker arm is fastened and mounted on the second spline shaft of the second torsion bar spring with a second bolt and a nut, the swing end of the second rocker arm is connected to the second front wheel, the second support rod is mounted on the second rocker arm, the third support bearing is mounted on the third support shaft, the third support shaft is mounted on the second support rod, the fourth support bearing is mounted on the fourth support shaft, the fourth support shaft is mounted on the fourth support rod, and the support plate is clamped between the third support bearing and the fourth support bearing; the steering shaft is mounted in a bearing on the vehicle body; its characteristics are: A first torsion bar spring shaft hole and a second torsion bar spring shaft hole are provided on the torsion bar spring seat, the steering shaft is connected to the upper end surface of the torsion bar spring seat, and the left and right steering handles are connected to the torsion bar spring seat; the left and right end surfaces and the lower end surface of the torsion bar spring seat are connected to the support plate; a first bearing is installed in the first torsion bar spring shaft hole, and the first torsion bar spring shaft is installed in the first bearing and the first torsion bar spring shaft hole and is fastened to the torsion bar spring seat; the first spline hole on the rotating end of the first rocker arm is fastened to the first spline shaft of the first torsion bar spring, the swinging end of the first rocker arm is connected to the first front wheel, the first support rod is installed on the first rocker arm, the first support bearing is installed on the first support shaft, the first support shaft is installed on the first support rod, the second support bearing is installed on the second support shaft, the second support shaft is installed on the first support rod, and the support plate is clamped between the first support bearing and the second support bearing.

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