Front fork bicycle frame

Abstract

The front fork bicycle frame comprises a cross beam with a first side face and a second side face, the first side face is provided with a wheel supporting structure and a mounting base, and the second side face is provided with a clamping structure; the clamping structure comprises a shell, and a containing cavity is formed in the shell; the first ends of the two clamping plates extend into the containing cavity from the two sides of the shell; the adjusting plate is arranged in the accommodating cavity; the adjusting bolt is inserted into the containing cavity from the outer side of the shell and is in threaded connection with the adjusting plate, and the adjusting bolt can drive the adjusting plate to move in the axial direction of the adjusting bolt; the first ends of the two clamping plates are located between the adjusting plate and the second end of the adjusting bolt. The adjusting bolt drives the adjusting plate to move towards the second end of the adjusting bolt, and the adjusting plate pushes the first ends of the two clamping plates so that the second ends of the two clamping plates can move relatively. The clamping structure is of an integrated structure, connection or release between the clamping structure and the vehicle-mounted luggage rack is controlled by the adjusting bolt, and operation is easy.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to a front fork bicycle frame. BACKGROUND

[0002] The vehicle-mounted bicycle frame is a device for fixing a bicycle on a vehicle for carrying, which is suitable for long-distance travel or outdoor leisure scenes of cycling enthusiasts.

[0003] However, the common bicycle frames on the current market still have many use pain points to be solved. The primary problem is that the fixing method of the bicycle frame and the luggage rack of the vehicle is not humanized enough. The existing fixing structure mostly adopts multi-component assembly, bolt fastening and other ways, which leads to time-consuming and laborious installation and disassembly process. In addition, the product has insufficient universality, mainly reflected in that the distance between the rear wheel fixing seat and the front fork fixing seat cannot be flexibly adjusted. Even if some products provide adjustment function, the operation procedure is often too complex, which brings inconvenience to users. This problem directly limits the adaptability of the bicycle frame to different models of bicycles, affecting the user experience. SUMMARY

[0004] The embodiment of the present application provides a front fork bicycle frame, which is used to solve at least one technical problem in the prior art.

[0005] The front fork bicycle frame comprises a crossbeam having a first side and a second side, the first side is provided with a wheel support structure and a mounting seat, the wheel support structure is configured to fix the rear wheel of a bicycle, the mounting seat is configured to fix the front fork of the bicycle, and the second side is provided with a clamping structure;

[0006] The clamping structure comprises,

[0007] An outer shell is provided with a cavity inside;

[0008] Two clamping plates, the first end of each clamping plate extends into the cavity from the two sides of the outer shell, each clamping plate is rotationally connected with the outer shell through a shaft, and the shaft is arranged between the first end and the second end of the clamping plate;

[0009] An adjusting plate is provided with a threaded hole, and the adjusting plate is arranged in the cavity; and

[0010] An adjusting bolt, the first end of the adjusting bolt is inserted into the cavity from the outside of the outer shell and is threadedly connected with the adjusting plate, and the adjusting bolt is selectively rotated to drive the adjusting plate to move along the axial direction of the adjusting bolt;

[0011] The first end of the two clamping plates is located between the adjusting plate and the second end of the adjusting bolt; the adjusting bolt drives the adjusting plate to move towards the second end of the adjusting bolt, and the adjusting plate pushes the first end of the two clamping plates to make the second end of the two clamping plates move relatively.

[0012] Compared with the prior art, first, the clamping structure of the present application is an integral structure, and the connection or release between the clamping structure and the vehicle-mounted luggage rack is controlled by the adjusting bolt, which is simple to operate. Secondly, in some embodiments, the adjusting bolt can also fix the clamping structure on the cross beam. At this time, the adjusting bolt can simultaneously complete the connection between the cross beam and the clamping structure and the connection between the clamping structure and the vehicle-mounted luggage rack. Thirdly, the first side surface of the cross beam is provided with a first sliding groove, and the wheel support structure or / and the mounting seat can slide along the first sliding groove, so that the bicycle frame of the present application can be adapted to bicycles with various wheelbase. Fourthly, the second side surface of the cross beam is provided with a second sliding groove, and the clamping structure can slide along the second sliding groove, so that the bicycle frame of the present application can be adapted to vehicle-mounted luggage racks with various widths. BRIEF DESCRIPTION OF DRAWINGS

[0013] The drawings accompanying the specification of the present application form a part of the present application, the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application. Among them:

[0014] Figure 1 It is a schematic diagram of the overall structure of the front fork bicycle frame in the embodiment of the present application;

[0015] Figure 2 It is a perspective view of Figure 1 ;

[0016] Figure 3 It is a schematic diagram of the structure of the cross beam and a partial enlarged schematic diagram in the embodiment of the present application;

[0017] Figure 4 It is a schematic diagram of the structure of the wheel support structure in the embodiment of the present application;

[0018] Figure 5 It is a schematic diagram of the structure of the mounting seat, connecting seat and clamping assembly in the embodiment of the present application;

[0019] Figure 6 It is an exploded schematic diagram of Figure 5 ;

[0020] Figure 7 It is a schematic diagram of the state of the mounting seat locking the front fork in the embodiment of the present application;

[0021] Figure 8 It is a schematic diagram of the overall structure of the clamping structure in the embodiment of the present application;

[0022] Figure 9 for Figure 8 A sectional view;

[0023] Figure 10 This is a schematic diagram showing the interconnection between the clamping structure, the luggage rack, and the crossbeam in an embodiment of this application;

[0024] Figure 11 This is a schematic diagram showing the connection between the clamping structure and the crossbeam in an embodiment of this application;

[0025] Figure 12 This is an exploded view of the connector in an embodiment of this application;

[0026] Figure 13 for Figure 2 A cross-sectional view in one of the directions;

[0027] Figure 14 for Figure 13 A magnified view of a portion of point A in the middle;

[0028] Figure 15 for Figure 13 A magnified view of a portion of point B in the middle;

[0029] Figure 16 This is a schematic diagram of the top cover of the connector in an embodiment of this application when it is open.

[0030] Explanation of reference numerals in the attached drawings: 10-Crossbeam; 1011-First slide groove; 1012-First slot; 1013-Second slide groove; 1014-Second slot; 1015-Notch; 1016-Partition plate; 1017-Strip hole; 102-End cap; 20-Clamping structure; 201-Outer shell; 2011-Adjusting hole; 202-Cavity; 2021-Limiting groove; 203-Clamping plate; 204-Shaft; 205-Adjusting bolt; 206-Adjusting plate; 2061-Limiting block; 207-Protrusion; 208-Torsion spring; 30-Wheel support structure; 301-Pattern; 302-Cable tie; 303-Pattern seat; 3031-Slider; 40- Connecting base; 401-Base body; 4011-First slot; 4012-Assembly hole; 4013-Limiting hole; 402-Top cover; 4021-Second opening; 4021-Second slot; 403-Lock assembly; 4031-Button; 40311-Column; 4032-Compression spring; 4033-Lock plate; 4035-Through hole; 50-Mounting base; 501-Base; 5011-Slider; 502-Upper clamp; 503-Rotating shaft; 504-Lock; 5041-Lock cylinder; 5042-Lock hook; 5043-Lock plate; 5044-Lock hole; 60-Front fork; 601-Front fork shaft; 70-Wrench; 80-Vehicle luggage rack. Detailed Implementation

[0031] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0032] In the description of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and do not require that this application be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The terms "connected," "linked," and "set up" used in this application should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; direct connections or indirect connections through intermediate components; wired connections, radio connections, or wireless communication signal connections. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0033] The accompanying drawings illustrate one or more examples of this application. The detailed description uses numerical and alphabetic designations to refer to features in the drawings. Similar or analogous designations in the drawings and description have been used to refer to similar or analogous parts of this 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 indicate the location or importance of individual components.

[0034] like Figure 1 and Figure 2As shown, according to an embodiment of this application, a front fork bicycle frame is provided, comprising a crossbeam 10. A wheel support structure 30 and a mounting seat 50 are mounted on a first side of the crossbeam 10, and a clamping structure 20 is mounted on a second side of the crossbeam 10. In this embodiment, the first side and the second side are two sides facing opposite directions. The wheel support structure 30 and the mounting seat 50 are respectively disposed on both sides of the crossbeam 10, wherein the wheel support structure 30 is used to fix the rear wheel of the bicycle, and the mounting seat 50 is used to fix the front fork 60 of the bicycle. At least two clamping structures 20 are typically provided, with at least two clamping structures 20 disposed on both sides of the crossbeam 10. In some cases, the clamping structure 20 may be selectively and directly fixedly connected to a vehicle luggage rack 80. Of course, if other beams are mounted on the vehicle luggage rack 80, the clamping structure 20 may also be connected to the beam structure. Furthermore, the vehicle luggage rack 80 is only one type of carrier in this application; other carriers with similar structures can also be applied, and no specific limitations are made here.

[0035] In some embodiments, such as Figure 3 As shown, the crossbeam 10 has a first groove 1011 extending along its length on its first side. The wheel support structure 30 and / or the mounting seat 50 can selectively slide along the first groove 1011. Sliding the wheel support structure 30 and / or the mounting seat 50 allows adjustment of the distance between the wheel support structure 30 and the mounting seat 50 to accommodate bicycles with different wheelbases, thus improving the versatility of this application; alternatively, it allows adjustment of the position of the wheel support assembly and the mounting seat 50 on the crossbeam 10 to change the relative position between the bicycle and the vehicle. In some embodiments, the crossbeam 10 is a strip profile with end caps 102 at both ends.

[0036] In some embodiments, such as Figure 4 As shown, the wheel support structure 30 includes a tray 301 with a groove for accommodating at least a portion of a tire. The groove has an opening, from which at least a portion of the tire can be selectively inserted. The tray 301 is provided with an adjustable strap 302, which can restrain the tire within the groove. The tray 301 is provided with a tray seat 303, which has a slider 3031 that slidably engages with the first groove 1011. Please refer to... Figure 3 In some embodiments, the first groove 1011 has an inwardly folded first slot 1012. The slider 3031 of the tray seat 303 is provided with a groove that is disposed opposite to the first slot 1012, so that the slider 3031 of the tray seat 303 can only slide along the length direction of the first slot 1012.

[0037] In some embodiments, such as Figure 5 and Figure 6As shown, the mounting base 50 includes a base 501 and an upper clamp 502. The base 501 is provided with a slider 3031 that slides in conjunction with the first sliding groove 1011. In some embodiments, the slider 5011 of the base 501 has the same structure as the slider 3031 of the tray seat 303, which will not be described again here. The first end of the upper clamp 502 is rotatably connected to the base 501 via a rotating shaft 503. The second end of the upper clamp 502 is provided with a lock cylinder 5041 of the lock 504 and a first locking member. The first end of the first locking member is fixedly connected to the lock cylinder 5041. The lock 504 also includes a second locking member, which is mounted on the crossbeam 10. In the unlocked state, the lock cylinder 5041 can rotate around its axis and drive the first locking member to rotate synchronously, so that the first locking member approaches the second locking member and locks with it.

[0038] In some embodiments, such as Figures 5 to 7 As shown, the first locking component is a lock hook 5042, the first end of which is connected to the lock cylinder 5041, and the second end of which has a hook portion. The second locking component is a lock plate 5043, which has a lock hole 5044 and is mounted on the crossbeam 10. When fixing the bicycle's front fork 60, the upper clamp 502 is in the open state, and the front fork shaft 601 is placed between the upper clamp 502 and the crossbeam 10; then, the upper clamp 502 is rotated so that the lock hook 5042 approaches and inserts into the lock hole 5044 of the lock plate 5043; the key is inserted into the lock cylinder 5041 to put the lock 504 in the unlocked state, and the lock cylinder 5041 is rotated to lock the hook portion of the lock hook 5042 into the lock hole 5044; after removing the key, the lock 504 is in the locked state. Of course, the locking method between the hook 5042 and the keyhole 5044 is just an example, and no specific restrictions are made here.

[0039] In some embodiments, such as Figure 8 and Figure 9As shown, the clamping structure 20 includes a housing 201 and two clamping plates 203, which are respectively disposed on both sides of the housing 201. A cavity 202 is provided inside the housing 201, and the first ends 2031 of both clamping plates 203 extend into the cavity 202 and are symmetrically arranged. A shaft 204 is provided between the first end 2031 and the second end 2032 of each clamping plate 203, and the clamping plates 203 are rotatably connected to the housing 201 via the shaft 204, with the axes of the two shafts 204 being parallel to each other. The second end 2032 of the clamping plate 203 has a bent portion, and the bending directions of the bent portions of the two clamping plates 203 are opposite to each other. An adjusting plate 206 is provided inside the cavity 202 of the housing 201, and the adjusting plate 206 has screw holes. The first ends 2031 of both clamping plates 203 abut against the upper surface of the adjusting plate 206. The top of the outer casing 201 is provided with an adjustment hole 2011, and the threaded end of the adjustment bolt 205 passes through the adjustment hole 2011 and is screwed onto the adjustment plate 206. When the adjustment bolt 205 is rotated, the adjustment plate 206 moves along the length of the adjustment bolt 205 under the engagement of the threads. When the adjustment plate 206 moves upward, it pushes the first ends 2031 of the two clamping plates 203 upward, causing the second ends 2032 of the two clamping plates 203 to move towards each other to achieve the purpose of clamping. When the adjustment plate 206 moves downward, the clamping force of the second ends 2032 of the two clamping plates 203 will gradually be released until it disappears.

[0040] Although the clamping force of the two clamping plates 203 will be released during the downward movement of the adjusting plate 206, the second ends 2032 of the two clamping plates 203 will not automatically unfold. Therefore, in some embodiments, an elastic element is provided on the clamping structure 20, with its two ends acting on the clamping plates 203 and the outer shell 201, respectively. Furthermore, the elastic element stores force when the first end 2031 of the clamping plate 203 is pushed upward by the adjusting plate 206, and when the adjusting plate 206 moves downward, the clamping plates 203 rotate in opposite directions under the drive of the elastic force of the elastic element, thereby gradually and automatically unfolding the second ends 2032 of the two clamping plates 203. For example... Figure 9 In the illustrated embodiment, the elastic element is a torsion spring 208, which is sleeved on the shaft 204 of the clamping plate 203. One end of the torsion spring 208 acts on the clamping plate 203, and the other end acts on the outer shell 201. The torsion spring 208 stores force when the first end 2031 of the clamping plate 203 moves upward, and when the adjusting plate 206 moves downward, the torsion spring 208 applies the stored force to the clamping plate 203 to unfold the second end 2032 of the clamping plate 203.

[0041] To prevent relative rotation of the adjusting plate 206 during vertical movement, in some embodiments, at least a portion of the sidewall of the adjusting plate 206 abuts against the inner wall of the cavity 202 during vertical movement. For example, the sidewall of the adjusting plate 206 has a limiting block 2061, and the inner wall of the cavity 202 is provided with a limiting groove 2021 along the length direction of the adjusting bolt 205. At least a portion of the limiting block 2061 is embedded in the limiting groove 2021 and slides along the limiting groove 2021.

[0042] In some embodiments, please combine Figure 3 As shown, the crossbeam 10 has a second groove 1013 extending along its length on its second side, and the second groove 1013 has a second slot 1014 with an inwardly folded edge. As shown in the figure, a partition 1016 is provided between the first groove 1011 and the second groove 1013, and the partition 1016 has a slot 1017 extending along its length. Please refer to [reference needed]. Figures 9 to 11 As shown, the adjusting bolt 205 has a bolt head and a threaded rod. The diameter of the bolt head is larger than the width of the second slot 1014, but smaller than the width between the inner walls of the second groove 1013; the diameter of the threaded rod is smaller than the width of the second slot 1014. The installation sequence of the clamping structure 20 and the crossbeam 10 can be as follows: First, rotate the adjusting bolt 205 so that there is a gap between the bolt head and the top of the outer casing 201, the height of which is slightly greater than the thickness of the folded edge of the second slot 1014; then, slide the adjusting bolt 205 into the second slot 1014 and move the clamping structure 20 to a suitable position. A suitable position means that the distance between the clamping structures 20 on both sides of the crossbeam 10 is approximately equal to the distance between the two beams of the vehicle roof rack 80. Then, place the clamping structure 20 on the beam of the vehicle roof rack 80 and use the wrench 70 to turn the adjusting bolt 205. During the tightening process of the adjusting bolt 205, the clamping structure 20 and the vehicle roof rack 80 are gradually clamped together. At the same time, the top surface of the outer casing 201 gradually comes into contact with the second side of the crossbeam 10 until they are securely connected.

[0043] like Figure 10 and Figure 11 As shown, the slot 1017 on the partition 1016 has a certain length, and the clamping structure 20 can be adjusted in position within the length range of the slot 1017. In some embodiments, the slot 1017 can be replaced with at least one round hole, which can be adapted to a specified vehicle roof rack 80.

[0044] In some embodiments, such as Figure 5 and Figure 6As shown, a connecting seat 40 is mounted on the crossbeam 10, and two clamping structures 20 and a second locking member are both mounted on the connecting seat 40. The connecting seat 40 includes a top cover 402 and a seat body 401, which are detachably connected. The crossbeam 10 is positioned between the top cover 402 and the seat body 401. The seat body 401 is fixedly mounted on the second side of the crossbeam 10. The seat body 401 has mounting holes 4012 on both sides of the crossbeam 10 along its length. Adjusting bolts 205 of the clamping structures 20 pass through the mounting holes 4012 and mount the clamping structures 20 onto the connecting seat 40. Tightening the adjusting bolts 205 achieves a secure connection between the clamping structures 20 and the vehicle luggage rack 80, as well as a secure connection between the clamping structures 20 and the connecting seat 40. Of course, when tightening the clamping structure 20, the top cover 402 must first be unloaded from the base 401; after the clamping structure 20 is tightened, the top cover 402 is then assembled onto the base 401. Under normal circumstances, the nuts of the adjusting bolts 205 are hidden inside the connecting seat 40 by the top cover 402, which, besides being aesthetically pleasing, more importantly, provides an anti-theft function. According to the above scheme, the upper clamp 502 of the mounting seat 50 has a locking function. As in the above embodiment, after the locking hook 5042 on the upper clamp 502 locks with the locking hole 5044 of the locking plate 5043, the state of the upper clamp 502 will be locked. At this time, it is difficult or impossible to remove the top cover 402 of the connecting seat 40 from the base 401, thus achieving the aforementioned anti-theft function.

[0045] To facilitate opening the top cover 402 while still retaining the anti-theft function, in some embodiments, such as Figures 12 to 16 As shown, the base 401 has first slots 4011 on both sides of the crossbeam 10 along its length, and correspondingly, the top cover 402 has second slots 4021 on both sides of the crossbeam 10 along its length. The first slots 4011 and the second slots 4021 are slidably engaged. Additionally, a second locking element is fixedly connected to the top cover 402. In this design, the top cover 402 can slide along the length of the crossbeam 10 on the base 401, but the engagement between the first slots 4011 and the second slots 4021 restricts the top cover 402's freedom in other directions. When the upper clamp 502 of the mounting base 50 is locked, the sliding of the top cover 402 is restricted, thus achieving an anti-theft function. When the upper clamp 502 is unlocked, the top cover 402 can be selectively slid.

[0046] In some embodiments, the top cover 402 is further provided with a locking assembly 403, which is used to limit the sliding range of the top cover 402. The locking assembly 403 includes a button 4031, one side of which has a post 40311, and a compression spring 4032 is sleeved on the outer side of the post 40311. The top of the top cover 402 has a through hole 4035, the post 40311 of the button 4031 is inserted into the through hole 4035, and the compression spring 4032 is constrained between the button 4031 and the top of the top cover 402. The post 40311 of the button 4031 protrudes from the other end of the through hole 4035, and a locking piece 4033 is fixed to the end of the post 40311 using bolts. The width of the locking piece 4033 is greater than the inner diameter of the through hole 4035, so that the button 4031 is restricted to the top cover 402, but the post 40311 of the button 4031 can slide axially within the through hole 4035. The folded edge of the first slot 1012 has a notch 1015, and at least a portion of the locking piece 4033 can be selectively inserted into the notch 1015 to achieve a locking engagement. When no external force is applied to the button 4031, the locking piece 4033 and the notch 1015 are in a locking engagement state, at which time the top cover 402 is locked and cannot slide. After pressing the button 4031 downwards, the locking piece 4033 moves downwards synchronously, causing the locking piece 4033 to disengage from the notch 1015. At this time, the locking of the top cover 402 is released, and it can slide to the desired position. Figure 16 The state shown.

[0047] 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 front fork bicycle frame, comprising a crossbeam (10) having a first side and a second side, the first side having a wheel support structure (30) and a mounting seat (50), and the second side having a clamping structure (20), characterized in that, The clamping structure (20) includes, The outer casing (201) has a cavity (202) inside it; Two clamping plates (203) are provided, with the first ends of the two clamping plates (203) extending into the cavity (202) from both sides of the outer shell (201). Each clamping plate (203) is rotatably connected to the outer shell (201) via a shaft (204), and the shaft (204) is located between the first end and the second end of the clamping plate (203). An adjusting plate (206) having a threaded hole is provided in the cavity (202); and An adjusting bolt (205) is provided, the first end of which extends from the outside of the housing (201) into the cavity (202) and is threadedly connected to the adjusting plate (206). The adjusting bolt (205) can be selectively rotated to drive the adjusting plate (206) to move along the axial direction of the adjusting bolt (205). The first ends of the two clamping plates (203) are located between the second ends of the adjusting plate (206) and the adjusting bolt (205); the adjusting bolt (205) drives the adjusting plate (206) to move toward the second end of the adjusting bolt (205), and the adjusting plate (206) pushes the first ends (2031) of the two clamping plates (203) so that the second ends (2032) of the two clamping plates (203) move toward each other.

2. The bicycle frame according to claim 1, characterized in that, The two clamping plates (203) are symmetrically arranged on the outer casing (201), and the axes (204) of the two clamping plates (203) are parallel to each other; or / and The second end of the clamp (203) has a bend, and the bending directions of the bends of the two clamps (203) are opposite to each other; or / and The clamping structure (20) is provided with an elastic element, one end of which acts on the outer shell (201) and the other end of which acts on the clamping plate (203). When the adjusting bolt (205) drives the adjusting plate (206) to move towards the second end of the adjusting bolt (205), the elastic element accumulates elastic force. When the adjusting bolt (205) drives the adjusting plate (206) to move towards the first end of the adjusting bolt (205), the elastic element, through the accumulated elastic force, drives the clamping plate (203) to rotate in the opposite direction, so that the second ends (2032) of the two clamping plates (203) move in opposite directions; or / and At least a portion of the sidewall of the adjusting plate (206) abuts against the inner wall of the cavity (202) to limit the degree of freedom of the adjusting plate (206) in the circumferential direction of the adjusting bolt (205).

3. The bicycle frame according to claim 1 or 2, characterized in that, The first side of the crossbeam (10) is provided with a first sliding groove (1011), and the wheel support structure (30) and / or the mounting base (50) can selectively slide along the first sliding groove (1011) to adjust the distance between the wheel support structure (30) and the mounting base (50); or / and The second side of the crossbeam (10) is provided with a second slide groove (1013), and at least two clamping structures (20) are provided and are respectively provided on both sides of the second slide groove (1013). At least one of the clamping structures (20) can be selectively slid along the second slide groove (1013).

4. The bicycle frame according to claim 3, characterized in that, The second groove (1013) has an inwardly folded second slot (1014), and the adjusting bolt (205) includes a bolt head and a threaded rod; the diameter of the bolt head is greater than the width of the second slot (1014), and the diameter of the threaded rod is smaller than the width of the second slot (1014); The clamping structure (20) can be selectively slid along the second slide groove (1013) by means of the adjusting bolt (205) and is fixedly connected to the crossbeam (10) by means of the adjusting bolt (205).

5. The bicycle frame according to claim 1 or 2, characterized in that, The crossbeam (10) is provided with a connecting seat (40), the connecting seat (40) includes a seat body (401) and a top cover (402), the seat body (401) is fixedly connected to the crossbeam (10), and the clamping structure (20) is fixed to the seat body (401) by its adjusting bolt (205); the top cover (402) can be selectively installed above the seat body (401) and hides the bolt cap of the adjusting bolt (205).

6. The bicycle frame according to claim 5, characterized in that, The mounting base (50) includes a base (501) and an upper clamp (502). The first end of the base (501) is connected to the crossbeam (10), and the second end of the base (501) is rotatably connected to the two ends of the upper clamp (502). The first end of the upper clamp (502) is provided with a first locking member. The top cover (402) is provided with a second locking element; The upper clamp (502) can be selectively rotated to bring the first locking member close to the second locking member and can be selectively locked with the second locking member to limit the range of motion of the top cover (402) on the base (501).

7. The bicycle frame according to claim 6, characterized in that, The first locking member has a hook portion, and the second locking member has a locking hole (5044); The first locking member can be selectively inserted into the lock hole (5044), and the first locking member can be rotated to lock the hook portion against the wall of the lock hole (5044).

8. The bicycle frame according to claim 6, characterized in that, The base (401) has a first slot (4011) on both sides of the crossbeam (10) along its length, and the top cover (402) has a second slot (4021) on both sides of the crossbeam (10) along its length. The first slot (4011) and the second slot (4021) can only be slidably connected along the length of the crossbeam (10).

9. The bicycle frame according to claim 8, characterized in that, The connecting seat (40) is provided with a locking assembly (403), and the top cover (402) is selectively locked to the crossbeam (10) by means of the locking assembly (403). The locking assembly (403) includes... A button (4031) is provided on one side of the button (4031); A through hole (4035) is provided on the top of the top cover (402); A locking piece (4033) is provided, wherein the column (40311) extends through the through hole (4035) and is fixedly connected to the locking piece (4033), and the width of the locking piece (4033) is greater than the inner diameter of the through hole (4035) so that the button (4031) is restricted to the top cover (402); A notch (1015) is provided on the first side of the crossbeam (10), and the locking piece (4033) can selectively engage with the notch (1015); and A spring is sleeved on the outside of the column (40311), one end of the spring acts on the top cover (402), and the other end acts on the button (4031); The spring is used to maintain the engagement between the locking piece (4033) and the notch (1015); the locking piece (4033) is released from the engagement with the notch (1015) when the button (4031) is subjected to external force.

10. The bicycle frame according to claim 9, characterized in that, The first side has a first groove (1011) opened along its length direction, and the first groove (1011) has a first slot (1012) with an inwardly folded edge; The notch (1015) is provided on the folded edge of the first slot (1012), and the spring is provided between the top cover (402) and the button (4031). Pressing the button (4031) causes the locking piece (4033) to move into the first slide groove (1011) to release the locking piece (4033) from the notch (1015).

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