Tail-mounted vertical bicycle frame

Abstract

The tail-mounted vertical bicycle frame comprises a connecting beam and a longitudinal beam, and a wheel bracket and a wheel seat are arranged on the longitudinal beam; the connecting beam and the longitudinal beam are connected through a rotatable connecting mechanism; the connecting mechanism comprises a limiting plate, the limiting plate is connected to the connecting beam, and the limiting plate is provided with at least one clamping opening which is sunken inwards; the rotating plate is connected to the longitudinal beam, and the rotating plate is hinged to the limiting plate; the pedal comprises a pushing part on the first side and a pressing part on the second side, the pedal is hinged to the rotating plate, and a locking rod is arranged on the pushing part; and the pedal selectively rotates and drives the lock rod to be embedded in the bayonet, so that the connecting mechanism cannot rotate. The connecting mechanism is relatively simple in structure, the manufacturing cost can be reduced, and the assembling difficulty can also be reduced. In addition, during use, an operator can quickly change the state of the connecting mechanism in a hand and foot combined mode.

Description

TECHNICAL FIELD

[0001] The embodiments of the present application relate to a tail-mounted vertical bicycle rack. BACKGROUND

[0002] With the increasing popularity of family cars, many families often install luggage racks on cars when going out for travel or sports to carry some daily necessities, sports equipment, etc. Some cycling enthusiasts usually install bicycle racks on the tail of the car to carry bicycles. Chinese patent CN221605730U discloses a vehicle-mounted bicycle reversible fixing bracket, the reversing structure of the bracket is relatively complex, the manufacturing cost is relatively high, the assembly difficulty is relatively large, and the operation in use is relatively complex. In addition, the bicycles on the bracket are carried in a horizontal manner. When such a bracket carries multiple bicycles, the bracket needs to continue to extend outward, making the tail of the vehicle too long, which not only affects the overall passability, but also poses a potential threat to driving safety; it will also cause the load center of gravity of the bracket to move outward, which will affect the stability of the bracket. SUMMARY

[0003] The embodiments of the present application provide a tail-mounted vertical bicycle rack to solve at least one technical problem in the prior art.

[0004] A tail-mounted vertical bicycle rack includes a connecting beam and a longitudinal beam, the first end of the connecting beam is installed on the tail of a vehicle, and the longitudinal beam is provided with at least one wheel bracket and at least one wheel seat;

[0005] The second end of the connecting beam is provided with a longitudinal beam and is connected through a rotatable connecting mechanism;

[0006] The connecting mechanism includes,

[0007] A limiting plate, the first end of the limiting plate is connected to the connecting beam, and the end face of the second end of the limiting plate is provided with at least one inwardly recessed socket;

[0008] A rotating plate, the first end of the rotating plate is connected to the longitudinal beam, and the second end of the rotating plate is hinged to the limiting plate; and

[0009] A pedal, the pedal includes a pushing part on a first side and a pressing part on a second side, and has an angle between the pushing part and the pressing part, the angle of the pedal is hinged to the rotating plate, and the pushing part is provided with a lock rod;

[0010] Wherein, the pedal can be selectively rotated and drive the lock rod to be inserted into the socket, so that the connecting mechanism cannot be rotated.

[0011] In some embodiments, the rotating plate is provided with a first hole, and the lock rod passes out of the first hole;

[0012] The pedal drives the lock rod to slide in the first hole and to selectively engage or disengage the bayonet.

[0013] In some embodiments, two sets of the limiting plate and the rotating plate are hingedly connected to each other, the two limiting plates are oppositely arranged, and the two rotating plates are oppositely arranged.

[0014] The two ends of the lock rod pass through the first holes on both sides and selectively engage with the bayonets on both sides.

[0015] In some embodiments, the pushing part is provided with a second hole, and the lock rod passes through the second hole and can slide along the length direction of the second hole.

[0016] The angle between the length direction of the first hole and the length direction of the second hole is not equal to 0, and the force between the limiting plate and the rotating plate in the relative rotation direction is transmitted and interacted through the lock rod.

[0017] In some embodiments, the axes of mutual rotation of the limiting plate and the rotating plate, the axes of mutual rotation of the rotating plate and the pedal, and the axis of the lock rod are parallel to each other.

[0018] In some embodiments, a first top plate is fixed above the limiting plate, and a second top plate is fixed above the rotating plate, the second top plate is located between the second end of the rotating plate and the longitudinal beam and below the first top plate; when the rotating plate and the limiting plate are rotated to a set angle, the top of the second top plate abuts against the bottom of the first top plate to limit the rotation range of the rotating plate in one direction.

[0019] In some embodiments, a buffer pad is arranged between the first top plate and the second top plate, and the buffer pad is arranged on the first top plate or / and the second top plate.

[0020] In some embodiments, the pushing part and the pressing part are located on both sides of the length direction of the longitudinal beam.

[0021] In some embodiments, a foot pad is arranged on the pressing part.

[0022] In some embodiments, a first cross beam and a second cross beam are mounted on the longitudinal beam, the second cross beam is arranged at the second end of the longitudinal beam, and the first cross beam is arranged between the connecting mechanism and the second cross beam.

[0023] The number of the wheel brackets is the same as the number of the wheel seats, and

[0024] At least one of the wheel brackets is disposed on the second crossbeam, and at least one of the wheel seats is disposed on the first crossbeam.

[0025] In some implementations, the connecting mechanism is provided with an elastic element for driving the locking rod to move toward the limiting plate.

[0026] In some embodiments, the elastic element includes a spring, one end of which acts on the pedal and the other end of which acts on the rotating plate or the longitudinal beam.

[0027] Compared with existing technologies, the connecting beam and longitudinal beam of this application are connected by a rotatable connecting mechanism. The structure of the connecting mechanism of this application is relatively simple, which can reduce manufacturing costs and assembly difficulty. In addition, during use, the operator can quickly change the state of the connecting mechanism by using both hands and feet. Thirdly, this application adopts a bicycle-style upright load-bearing method. When the bicycle frame carries multiple bicycles, the center of gravity of the bicycle frame will not extend too far outward, which can improve the stability of the bicycle frame. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:

[0029] Figure 1 This is a schematic diagram of the overall structure of the bicycle frame in the embodiments of this application;

[0030] Figure 2 for Figure 1 A partially enlarged schematic diagram at point A shows the structure of one type of wheel bracket.

[0031] Figure 3 for Figure 1 A partially enlarged schematic diagram at point B, showing the structure of one type of wheel seat;

[0032] Figure 4 for Figure 1 Another perspective schematic diagram, and a partially enlarged schematic diagram of the connecting mechanism;

[0033] Figure 5 for Figure 1 A diagram showing a top-down view;

[0034] Figure 6 This is an exploded view of one of the connecting mechanisms in the embodiments of this application;

[0035] Figure 7 for Figure 5 A cross-sectional view along the DD direction;

[0036] Figure 8 Fig. 1 is a perspective view of a bicycle frame according to an embodiment of the present application; Figure 7 Fig. 2 is a partial enlarged view at E in Fig. 1;

[0037] Figure 9 Fig. 4 is a schematic view of the connecting mechanism in different states; Figure 10 Figure 8 Fig. 5 is a schematic view of the connecting mechanism in different states;

[0038] Figure 11 Fig. 6 is a schematic view of the connecting mechanism in different states;

[0039] BRIEF DESCRIPTION OF DRAWINGS

[0040] 10 - longitudinal beam;

[0041] 20 - first cross beam; 201 - connecting seat;

[0042] 30 - wheel seat; 301 - supporting plate; 302 - accommodating groove; 303 - tie strap assembly;

[0043] 40 - second cross beam;

[0044] 50 - wheel bracket; 501 - frame; 502 - area; 503 - tie strap;

[0045] 60 - connecting beam;

[0046] 70 - connecting mechanism; 701 - limiting plate; 7011 - first clasp; 7012 - second clasp; 7013 - first shaft hole; 7014 - first top plate; 702 - rotating plate; 7021 - second shaft hole; 7022 - third shaft hole; 7023 - first slot; 7024 - second top plate; 7025 - buffer pad; 703 - pedal; 7031 - pushing part; 7031a - first side plate; 7031b - second side plate; 7032 - pressing part; 7033 - fourth shaft hole; 7034 - second slot; 704 - first rotating shaft; 705 - second rotating shaft; 706 - locking rod; 707 - torsion spring; 708 - bolt; 709 - foot pad. DETAILED DESCRIPTION

[0047] The present application will be described in detail below with reference to the attached drawings and embodiments. Various examples are provided by way of explanation of the present application and are not intended to limit the present application. In fact, those skilled in the art will appreciate that modifications and variations to the present application can be made without departing from the spirit or scope of the application. For example, features shown or described as part of one embodiment can be used in another embodiment to yield still a further embodiment. It is, therefore, desired that the present application be considered in its broadest aspect and be interpreted to cover all such modifications and variations as falling within the scope of the appended claims and their equivalents.

[0048] ​In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and do not require the present application to be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. The terms "connected", "connected", "provided" used in the present application should be understood broadly, for example, it can be fixedly connected or detachably connected; it can be directly connected or indirectly connected through intermediate components; it can be wired electrical connection, wireless electrical connection or wireless communication signal connection, and the specific meaning of the above terms can be understood by those skilled in the art according to the specific circumstances.

[0049] One or more examples of the present application are shown in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the present application. As used herein, the terms "first", "second", and "third", etc. are used interchangeably to distinguish one component from another and are not intended to signify location or importance of the individual components.

[0050] As shown in Figures 1 to 3 According to an embodiment of the present application, a tail-mounted vertical bicycle rack is provided, which is mounted at the tail of a vehicle. The bicycle rack comprises a connecting beam 60, a first end of the connecting beam 60 is mounted at the tail of the vehicle, a second end of the connecting beam 60 is provided with a longitudinal beam 10, and the second end of the connecting beam 60 is connected with a first end of the longitudinal beam 10 through a rotatable connecting mechanism 70.

[0051] As shown in Figure 6 and Figure 8As shown, the connecting mechanism 70 includes two side-facing limiting plates 701. The first ends of the two limiting plates 701 are fixed to the second ends of the connecting beam 60. The end faces of the second ends of both limiting plates 701 have inwardly recessed first latches 7011 and second latches 7012. The connecting mechanism 70 also includes two side-facing rotating plates 702. The first ends of the two rotating plates 702 are fixed to the first ends of the longitudinal beam 10, and the second ends of the two rotating plates 702 are located between the two limiting plates 701 and hinged. In this embodiment, both limiting plates 701 are provided with first shaft holes 7013, and the two first shaft holes 7013 have the same axis. Both rotating plates 702 are provided with second shaft holes 7021, and the two second shaft holes 7021 have the same axis. During assembly, the two rotating plates 702 are placed between the two limiting plates 701, with the axes of the first shaft holes 7013 and the second shaft holes 7021 coinciding. The first rotating shaft 704 is inserted into the first shaft hole 7013 and the second shaft hole 7021 to achieve the hinge connection between the rotating plate 702 and the limiting plate 701.

[0052] like Figure 6 and Figure 8 As shown, a rotatable pedal 703 is provided between two rotating plates 702. In this embodiment, the pedal 703 has a pushing part 7031 on its first side and a pressing part 7032 on its second side. The pushing part 7031 and the pressing part 7032 have an angle, making the pedal 703 L-shaped. Both rotating plates 702 have a third shaft hole 7022, and the two third shaft holes 7022 have the same axis. The two third shaft holes 7022 are located at the bottom of the two rotating plates 702. A fourth shaft hole 7033 is provided at the corner of the pedal 703. During assembly, the pushing part 7031 of the pedal 703 is placed between the two rotating plates 702, with the axes of the third shaft hole 7022 and the fourth shaft hole 7033 coinciding. A second rotating shaft 705 is inserted into the third shaft hole 7022 and the fourth shaft hole 7033 to achieve a rotatable connection between the pedal 703 and the two rotating plates 702.

[0053] In this design, the pressing part 7032 of the pedal 703 is located below the first end of the longitudinal beam 10, and the ends of the pushing part 7031 and the pressing part 7032 are located on both sides of the longitudinal beam 10. When the pressing part 7032 is pressed down, the pedal 703 can rotate around the second pivot 705 in a first direction, causing the end of the pushing part 7031 to move closer to the longitudinal beam 10; then, when the pressing part 7032 is pulled up, the pedal 703 can rotate around the second pivot 705 in the opposite second direction, causing the end of the pushing part 7031 to move away from the longitudinal beam 10.

[0054] like Figure 8 and Figure 9As shown, in some embodiments, a torsion spring 707 is sleeved on the second rotating shaft 705. One end of the torsion spring 707 acts on the pushing part 7031, and the other end acts on the longitudinal beam 10. The torsion spring 707 can provide a spring force for the pedal 703 to rotate in the second direction, so that the end of the pushing part 7031 maintains a certain distance from the longitudinal beam 10. In addition, after pressing down on the pressing part 7032, the torsion spring 707 will accumulate spring force. When the external force acting on the pressing part 7032 is removed, the pedal 703 can automatically rotate back.

[0055] like Figure 6 , Figure 8 and Figure 9 As shown, the pushing part 7031 is provided with a locking rod 706, the axis of which is parallel to the axis of the fourth shaft hole 7033. Both rotating plates 702 are provided with a first hole 7023, and the two first holes 7023 have the same axis. Both ends of the locking rod 706 extend from the first holes 7023 on both sides. When the locking rod 706 moves synchronously with the pedal 703, the end of the locking rod 706 can move within the first hole 7023. In this application, the first hole 7023 has a limiting function; the length of the first hole 7023 can control the maximum angle of rotation of the pedal 703, thereby controlling the stroke of the pressing part 7032 when the pedal 703 rotates.

[0056] The state of the connecting mechanism 70 after assembly is as follows Figure 4 As shown in the enlarged view, the end of the locking rod 706 extends out of the first hole 7023 of the rotating plate 702 and can be selectively engaged with the first bayonet 7011 or the second bayonet 7012. Figure 4 This is a schematic diagram showing the engagement state of the locking rod 706 and the first bayonet 7011. Figure 11 This is a schematic diagram showing the engagement state of the locking rod 706 and the second bayonet 7012.

[0057] in, Figure 8 and Figure 4 Similar to the bicycle frame, the longitudinal beam 10 is in an upright position. When it is necessary to adjust the state of the longitudinal beam 10 (for example, to open the rear door of the vehicle), the operator holds the longitudinal beam 10 with their hand, steps on the pressing part 7032 and presses down. The pedal 703 will rotate in the first direction, and the locking lever 706 will disengage from the first latch 7011. Please refer to [link / reference]. Figure 9 At this time, along Figure 10 Move the longitudinal beam 10 in the direction of the arrow, causing the longitudinal beam 10, the rotating plate 702, and the pedal 703 to rotate around the first pivot 704. When the locking lever 706 rotates to the position of the second latch 7012, remove your foot from the pressing part 7032. Please refer to... Figure 11In the enlarged portion, manually turning the pedal 703 in the second direction will cause the locking rod 706 to enter the second latch 7012 and engage with it; or, in an embodiment with a torsion spring 707, the pedal 703 can rotate in the second direction under the drive of the torsion spring 707 so that the locking rod 706 automatically engages with the second latch 7012.

[0058] Additionally, in the embodiment provided with a torsion spring 707, along... Figure 10 During the movement of the longitudinal beam 10 in the direction of the arrow, the foot can be removed from the pressing part 7032 at any time. At this time, the locking rod 706, under the force of the torsion spring 707, always abuts against the end of the limiting plate 701. When the locking rod 706 moves to the position of the second latch 7012, the locking rod 706 will quickly insert into the second latch 7012 under the force of the torsion spring 707 to complete the locking.

[0059] like Figure 6 and Figure 8 As shown, in some embodiments, the pushing part 7031 of the pedal 703 includes two opposing first side plates 7031a and a second side plate 7031b, with the second side plate 7031b disposed between the two first side plates 7031a. Each of the two first side plates 7031a has a second hole 7034. The two ends of the locking rod 706 pass outwards through the second hole 7034 and the first hole 7023 respectively, and can selectively engage with the latches on the limiting plate 701. The angle between the length direction of the first hole 7023 and the length direction of the second hole 7034 is approximately 90 degrees, but can be greater or less than 90 degrees, but cannot be 0 degrees. The second side plate 7031b has a through hole, through which a bolt 708 passes and connects to the locking rod 706. The bolt 708 is only used to limit the displacement of the locking rod 706 in its length direction. The locking rod 706 is not fixedly connected to the pedal 703, and it can slide along the length direction of the second hole 7034. The purpose is that when both sides of the locking rod 706 are engaged with the first latch 7011 or the second latch 7012, the force on the connecting mechanism 70 will be transmitted between the inner wall of the first hole 7023 and the locking rod 706, and between the locking rod 706 and the latch. That is, the limiting plate 701 and the rotating plate 702 bear the force on the connecting mechanism 70 through the locking rod 706, and the force on the locking rod 706 will not be transmitted to the pedal 703.

[0060] like Figure 6 and Figure 7As shown, in some embodiments, the top of the two limiting plates 701 is provided with a first top plate 7014, which is fixedly connected with the top of the two limiting plates 701. The top of the two rotating plates 702 is provided with a second top plate 7024, which is fixedly connected with the top of the two rotating plates 702. When the rotating plate 702 rotates to the position where the locking rod 706 is located in the first clamping hole 7011 in the second direction around the first rotating shaft 704, the top of the second top plate 7024 abuts against the bottom of the first top plate 7014, so as to limit the range of rotation of the rotating plate 702 in the second direction. In some embodiments, the outer wall of the second top plate 7024 or the inner wall of the first top plate 7014 is provided with a buffer pad 7025, so as to reduce the impact force when the first top plate 7014 abuts against the second top plate 7024. In the embodiment of the drawings, the buffer pad 7025 is arranged on the outer wall of the second top plate 7024 and is fixedly connected with the same.

[0061] In some embodiments, as shown in Figure 6 and Figure 8 The pressing part 7032 of the pedal 703 is provided with a foot pad 709, which can be made of relatively soft materials such as rubber, plastic, etc. The foot pad 709 can play a certain anti-skid role, and since the foot pad 709 is made of relatively soft materials, the degree of damage can be reduced when the foot pad 709 collides with other objects.

[0062] In the above embodiments, the number of clamping holes on the limiting plate 701 is only used for example, and one or more clamping holes can be arranged according to different needs.

[0063] As shown in Figure 1 In some embodiments, the longitudinal beam 10 is provided with a first cross beam 20 and a second cross beam 40. The first cross beam 20 and the second cross beam 40 are parallel to each other and perpendicular to the longitudinal beam 10. The first cross beam 20 is installed between the two ends of the longitudinal beam 10 through a connecting seat 201, and the second cross beam 40 is installed at the second end of the longitudinal beam 10. The first cross beam 20 is provided with four wheel seats 30 distributed along the length direction thereof, and the second cross beam 40 is provided with four wheel brackets 50 distributed along the length direction thereof. The four wheel seats 30 and the four wheel brackets 50 are oppositely arranged.

[0064] As shown in Figure 2As shown, in some embodiments, the wheel bracket 50 includes a frame 501 that encloses a region 502 into which a portion of the bicycle tire can be embedded, and at least a portion of the frame 501 is engaged with the tire in a vertical direction, thereby confining it to the frame 501. In this embodiment, the longitudinal direction of the longitudinal beam 10 is perpendicular to the surface formed by the region 502 enclosed by the frame 501, and the tire is supported on the frame 501. The frame 501 is fixedly mounted to the second crossbeam 40 by bolts or other connectors, or by welding. When placing the bicycle, a portion of the bicycle tire is embedded within the region 502 enclosed by the frame 501, and the tire is detachably secured to the wheel bracket 50 using fasteners such as cable ties 503.

[0065] like Figure 3 As shown, in some embodiments, the wheel holder 30 includes a support plate 301 with an inwardly recessed receiving groove 302 for accommodating a portion of the bicycle tire. The support plate 301 is mounted on the side of the first crossbeam 20. When the bicycle is placed upright, one tire rests on the wheel bracket 50, and the other tire engages with the receiving groove 302 from the side of the bicycle frame. The tire can then be optionally detachably secured to the wheel holder 30 using a cable tie assembly 303.

[0066] The above descriptions are merely examples of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A rear-mounted upright bicycle frame, comprising a connecting beam (60) and a longitudinal beam (10), wherein the first end of the connecting beam (60) is mounted at the rear of the vehicle, characterized in that, The longitudinal beam (10) is provided with at least one wheel bracket (50) and at least one wheel seat (30); The second end of the connecting beam (60) is provided with a longitudinal beam (10) and is connected to it by a rotatable connecting mechanism (70); The connecting mechanism (70) includes, A limiting plate (701) is provided with a first end connected to the connecting beam (60), and the end face of the second end of the limiting plate (701) is provided with at least one inwardly recessed slot. A rotating plate (702), the first end of which is connected to the longitudinal beam (10), and the second end of which is hinged to the limiting plate (701); and A pedal (703) includes a pushing part (7031) on a first side and a pressing part (7032) on a second side. There is an angle between the pushing part (7031) and the pressing part (7032). The angle of the pedal (703) is hinged to the rotating plate (702). A locking rod (706) is provided on the pushing part (7031). The pedal (703) can be selectively rotated to drive the locking rod (706) to engage with the bayonet, so that the connecting mechanism (70) cannot rotate.

2. The bicycle frame according to claim 1, characterized in that, The rotating plate (702) is provided with a first hole (7023), and the locking rod (706) passes through the first hole (7023); The pedal (703) drives the locking rod (706) to slide within the first hole (7023) and can selectively engage or disengage from the bayonet.

3. The bicycle frame according to claim 2, characterized in that, Two sets of mutually hinged limiting plates (701) and rotating plates (702) are provided, with the two limiting plates (701) arranged opposite to each other and the two rotating plates (702) arranged opposite to each other; The locking rod (706) has two ends that pass through the first hole (7023) on both sides and can be selectively engaged with the bayonet on both sides.

4. The bicycle frame according to claim 3, characterized in that, The pushing part (7031) is provided with a second hole (7034), and the locking rod (706) passes through the second hole (7034) and can slide along the length direction of the second hole (7034); Wherein, the angle between the length direction of the first hole (7023) and the length direction of the second hole (7034) is not equal to 0, and the forces of the limiting plate (701) and the rotating plate (702) in the relative rotation direction interact through the locking rod (706).

5. The bicycle frame according to claim 1, characterized in that, The axes of rotation of the limiting plate (701) and the rotating plate (702), the axes of rotation of the rotating plate (702) and the pedal (703), and the axis of rotation of the locking rod (706) are parallel to each other; or / and The pushing part (7031) and the pressing part (7032) are located on both sides of the longitudinal beam (10) along its length; or / and The pressing part (7032) is provided with a foot pad (709).

6. The bicycle frame according to claim 1, characterized in that, A first top plate (7014) is fixedly connected above the limiting plate (701), and a second top plate (7024) is fixedly connected above the rotating plate (702). The second top plate (7024) is located between the second end of the rotating plate (702) and the longitudinal beam (10) and is located below the first top plate (7014). When the rotating plate (702) and the limiting plate (701) rotate to a set angle, the top of the second top plate (7024) abuts against the bottom of the first top plate (7014) to limit the rotation range of the rotating plate (702) in one direction.

7. The bicycle frame according to claim 6, characterized in that, A buffer pad (7025) is provided between the first top plate (7014) and the second top plate (7024), and the buffer pad (7025) is disposed on the first top plate (7014) and / or the second top plate (7024).

8. The bicycle frame according to claim 1, characterized in that, A first crossbeam (20) and a second crossbeam (40) are installed on the longitudinal beam (10). The second crossbeam (40) is disposed at the second end of the longitudinal beam (10), and the first crossbeam (20) is disposed between the connecting mechanism (70) and the second crossbeam (40). The number of wheel brackets (50) is the same as the number of wheel seats (30), and At least one of the wheel brackets (50) is disposed on the second crossbeam (40), and at least one of the wheel seats (30) is disposed on the first crossbeam (20).

9. The bicycle frame according to any one of claims 1 to 8, characterized in that, The connecting mechanism (70) is provided with an elastic element for driving the locking rod (706) to move toward the limiting plate (701).

10. The bicycle frame according to claim 9, characterized in that, The elastic element includes a spring, one end of which acts on the pedal (703) and the other end of which acts on the rotating plate (702) or the longitudinal beam (10).

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