Vehicle-mounted bicycle frame

Abstract

The invention provides a vehicle-mounted bicycle frame which is used for being installed on a frame of an automobile and comprises a base frame, a front wheel fixing mechanism and a rear wheel fixing mechanism. The rear wheel fixing mechanism comprises a rear wheel fixing seat which is in sliding fit with a top sliding groove of the base frame so as to be matched with different bicycle wheel bases, the rear wheel fixing seat comprises a position control assembly used for relieving and enhancing the fixing relation with the base frame, and the position control assembly controls position fixing through a hand twisting knob. The front wheel fixing mechanism is fixedly mounted on the base frame, and the rear wheel fixing mechanism is in sliding fit with the base frame, so that when the distances between central rotating shafts of front and rear wheels of a bicycle are different, the rear wheel fixing seat can move back and forth relative to the front wheel fixing mechanism; and the position of the rear wheel fixing mechanism is directly controlled to be fixed by manually screwing a knob, so that the vehicle-mounted bicycle frame can be suitable for bicycles of different models, and is convenient to adjust and simple and stable in structure.

Description

Technical Field

[0001] The invention relates to the field of vehicle-mounted bicycle racks, and in particular to a vehicle-mounted bicycle rack. Background Art

[0002] Bicycles are widely used in sports and fitness. Many bicycle enthusiasts often install on-vehicle bicycle racks on cars. These cars have fixed rod-shaped frames, which can be racks on the roof / rear of the car or luggage racks installed on the racks. The on-vehicle bicycle racks can be detachably installed on the rod-shaped frames. Since different types of bicycles may have different lengths, that is, the distances between the center axes of the front and rear wheels of the bicycles are different, current on-vehicle bicycle racks are usually only suitable for bicycles with a single wheelbase, or complex operations are required to adjust the on-vehicle bicycle racks to suit different types of bicycles.

[0003] In view of this, this application is filed. Summary of the invention

[0004] The present invention provides a vehicle-mounted bicycle rack to solve at least one of the above technical problems.

[0005] A vehicle-mounted bicycle rack is used for being installed on a vehicle frame, and comprises a base frame, a front wheel fixing mechanism and a rear wheel fixing mechanism. The base frame is in a long strip shape and has a top slide groove arranged along its length direction.

[0006] The front wheel fixing mechanism includes a front wheel fixing seat fixedly mounted on the base frame, and a front wheel fixing frame which can rotate relative to the front wheel fixing seat and whose rotation angle range can be limited; the rear wheel fixing mechanism includes a rear wheel fixing seat which is slidably matched with the top slide groove to adapt to different bicycle wheel wheelbases, and a rear wheel fixing frame which can rotate relative to the rear wheel fixing seat and whose rotation angle range can be limited, the rear wheel fixing seat includes a position control component for releasing and strengthening the fixed relationship with the base frame, and the position control component controls the position fixation by a hand-tightening knob.

[0007] Furthermore, the position control component also includes a rear wheel fixing plate, a sliding fixing plate that can be slidably fitted in the top slide groove of the base frame, an adjustment fixing column fixed on the sliding fixing plate and passing through the rear wheel fixing plate, and the upper part of the adjustment fixing column is threadedly fitted with the hand-tightening knob; the rear wheel fixing plate is a part of the rear wheel fixing seat body or is fixedly connected to the rear wheel fixing seat body.

[0008] Furthermore, it also includes a detachable mounting and fixing mechanism, including a first mounting seat that can be slidably fitted on the base frame, a second mounting seat that can be slidably fitted on the base frame, and a lower base plate whose one end is rotatably fitted with the first mounting seat, and the other end of the lower base plate is detachably fixedly connected to the second mounting seat via a detachable fastening assembly; there are at least two detachable mounting and fixing mechanisms, and the second mounting seat of one of the detachable mounting and fixing mechanisms is fixedly connected to the rear wheel fixing seat or is a part of the rear wheel fixing seat.

[0009] Furthermore, the lower base plate includes a base plate hinge portion which is arranged in sequence for rotationally cooperating with the first mounting seat, a base plate fixing portion which passes through the bottom of the frame, a base plate mounting portion which is detachably fixed to the second mounting seat, and a base plate bending portion which is bent and extended from the base plate hinge portion toward a side away from the base plate fixing portion, and the base plate bending portion is used to abut and cooperate with the base frame or the first mounting seat to limit the downward rotation angle of the lower base plate relative to the base frame.

[0010] Furthermore, the rear wheel fixing mechanism includes an adjusting component, which includes an adjusting rack arranged on the rear wheel fixing frame, an adjusting sleeve that slides relative to the length direction of the adjusting rack, an adjusting block that is hinged on the adjusting sleeve and can be engaged with the adjusting rack, a reset member for driving the adjusting block and the adjusting rack to engage, and an adjusting table located on the side of the rear wheel hinge away from the middle of the base frame; an adjusting abutment block is provided on the side of the adjusting sleeve close to the adjusting table, and the adjusting abutment block is used to abut and cooperate with the adjusting table to limit the maximum angle of outward flipping of the rear wheel fixing frame relative to the base frame.

[0011] Furthermore, when the rear wheel fixing frame is flipped to a predetermined fixed angle relative to the base frame, the bottom surface of the adjusting abutment block is in contact with the surface of the adjusting table.

[0012] Furthermore, it also includes an anti-theft lock, which includes a lock seat and a flexible locking strip; the lock seat includes a lock base and a lock seat, a lock core for locking and unlocking the lock base and the lock seat, and a fixing component for mounting the lock base on a base frame; the lock base is provided with a first mounting through hole, and the fixing component includes a first mounting bolt for passing through the first mounting through hole to mount the lock base; the lock seat is provided with an anti-theft shell, and the anti-theft shell is used to cover the bolt head of the first mounting bolt when the lock core locks the lock base and the lock seat; one end of the flexible locking strip is connected to the lock seat, and the other end can pass through the frame, the base frame and the bicycle and then be locked and unlocked by the lock seat through the lock core.

[0013] Furthermore, the fixing assembly also includes a sliding mounting plate that can be slidably matched in the top sliding groove of the base frame, and the sliding mounting plate is provided with a threaded hole that is compatible with the first mounting bolt.

[0014] Furthermore, position marks adapted to various bicycle models and sizes are provided on the side walls of the base frame along the length direction thereof, so that the rear wheel fixing seat can be locked at a matching base frame position according to actual use requirements.

[0015] Furthermore, a front wheel hinge portion between the front wheel fixing frame and the front wheel fixing seat is higher than a rear wheel hinge portion between the rear wheel fixing frame and the rear wheel fixing seat, so that the front wheel fixing frame is pressed above the rear wheel fixing frame in the folded state; and a front wheel strap is provided on the front wheel fixing frame, one end of the front wheel strap is arranged on a tubular structure on one side of the front wheel fixing frame, and Velcro is provided on the front and back sides of the front wheel strap, so that the front wheel fixing frame can be tied and fixed to the base frame when in use, and rolled up in a circle on the front wheel fixing frame when stored.

[0016] The vehicle-mounted bicycle rack of the present invention is fixedly mounted on the base frame by a front wheel fixing mechanism, and the rear wheel fixing mechanism is slidably matched on the base frame, and the position of the rear wheel fixing mechanism can be directly controlled by a hand-twisted knob, so that the vehicle-mounted bicycle rack can be suitable for bicycles with different front and rear wheel center shaft distances, that is, it can be suitable for bicycles of different models, and is easy to adjust, simple in structure and stable.

[0017] Furthermore, the vehicle-mounted bicycle rack of the present invention is provided with at least two detachable mounting and fixing mechanisms, and the second mounting seat of one of the detachable mounting and fixing mechanisms is directly used as the rear wheel fixing seat, so that the detachable mounting and fixing mechanism is directly integrated with the rear wheel fixing seat. Since the detachable mounting and fixing mechanism can also slide relative to the base frame, it does not affect the sliding adjustment effect of the rear wheel, and can make the rear wheel fixing mechanism more stable when the vehicle-mounted bicycle rack is installed on the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 1 is a schematic diagram of the structure of a vehicle-mounted bicycle rack in a folded state according to an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Schematic diagram of the structure in the open state;

[0020] Figure 3 yes Figure 1 A schematic diagram of the overall structure of the front wheel fixing mechanism;

[0021] Figure 4 yes Figure 3 Schematic diagram of the structure behind the hidden front wheel fixing shell;

[0022] Figure 5yes Figure 3 A schematic diagram of the overall structure of the front wheel fixing seat;

[0023] Figure 6 yes Figure 3 A schematic diagram of a structure in which a front wheel fixing seat is installed on a base frame;

[0024] Figure 7 yes Figure 1 A schematic diagram of the structure of an anti-theft lock from a first perspective;

[0025] Figure 8 yes Figure 7 Schematic diagram of the lock seat structure;

[0026] Fig. 9 yes Figure 8 Schematic diagram of the structure in the open state;

[0027] Fig.10 yes Fig. 9 A schematic diagram of the second perspective structure;

[0028] Fig.11 yes Figure 1 A schematic diagram of the overall structure of a detachable mounting and fixing mechanism;

[0029] Fig.12 yes Fig.11 A schematic diagram of the second perspective structure;

[0030] Fig.13 yes Fig.11 A schematic diagram of the structure after hiding part of the structure of the first mounting seat from a second viewing angle;

[0031] Fig.14 yes Figure 1 A schematic diagram of the overall structure of the rear wheel fixing mechanism;

[0032] Fig.15 yes Fig.14 Schematic diagram of the structure after some parts are hidden;

[0033] Fig.16 yes Figure 1 A schematic diagram of a first opening angle structure;

[0034] Fig.17 yes Figure 1 A schematic diagram of a second opening angle structure;

[0035] Fig.18 yes Figure 1 Schematic diagram of the third opening angle structure.

[0036] Reference numerals:

[0037] 1. Base frame; 11. Top slide; 12. Bottom slide; 13. Position mark; 2. Front wheel fixing mechanism; 21. Front wheel fixing frame; 211. Fixing frame limit plate; 22. Front wheel holder; 23. Front wheel fixing seat; 231. Fixing frame limit block; 232. Turning bolt; 233. Turning nut; 234. Sliding mounting block; 235. Adjusting bolt; 24. Front wheel fixing shell; 241. Fixing bolt; 25. Front wheel strap; 3. Rear wheel fixing mechanism; 31. Rear wheel fixing frame; 32. Rear wheel fixing seat; 33. Adjusting assembly; 331. Adjusting rack; 332. Adjusting sleeve; 3321. Adjusting abutment block; 333. Adjusting block; 334. Adjusting table; 34. Rear wheel sliding assembly; 35. Position control assembly; 351. Hand-tightening knob; 352. Rear wheel 1. fixing plate; 353. sliding fixing plate; 354. adjusting fixing column; 36. rear wheel holder; 4. detachable mounting fixing mechanism; 41. first mounting seat; 42. second mounting seat; 422. mounting seat body; 423. strip plate; 424. wide plate; 43. lower bottom plate; 431. bottom plate hinge part; 432. bottom plate fixing part; 433. bottom plate mounting part; 434. bottom plate bending part; 441. fastening bolt; 442. fastening nut; 5. anti-theft lock; 51. lock seat; 511. lock base; 5111. lock groove; 512. lock upper seat; 5121. anti-theft shell; 513. lock core; 5131. keyhole; 5132. lock tongue; 514. first mounting bolt; 515. sliding mounting plate; 516. second mounting bolt; 52. flexible lock strip; 521. ring. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0040] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0041] Please refer to Figures 1 to 18 A vehicle-mounted bicycle rack is used to be installed on a vehicle frame, comprising a base frame 1, a front wheel fixing mechanism 2 and a rear wheel fixing mechanism 3. The base frame 1 is in an elongated shape and has a top slide groove 11 and a bottom slide groove 12 arranged along its length direction.

[0042] The front wheel fixing mechanism 2 comprises a front wheel fixing seat 22 fixedly mounted on the base frame 1, and a front wheel fixing frame 21 which can rotate relative to the front wheel fixing seat 22 and the rotation angle range can be limited; the rear wheel fixing mechanism 3 comprises a rear wheel fixing seat 32 which is slidably matched with the top slide groove 11 to adapt to different bicycle wheel wheelbases, and a rear wheel fixing frame 31 which can rotate relative to the rear wheel fixing seat 32 and the rotation angle range can be limited, the rear wheel fixing seat 32 comprises a position control component 35 for releasing and strengthening the fixed relationship with the base frame 1, and the position control component 35 controls the position fixation by a hand-tightening knob 351.

[0043] In the present application, the front wheel fixing mechanism 2 is fixedly installed on the base frame 1, and the rear wheel fixing mechanism 3 is slidably fitted on the base frame 1, and the position of the rear wheel fixing mechanism 3 can be directly controlled by a hand-twisted knob 351, so that the vehicle-mounted bicycle rack can be suitable for different models of bicycles, whether they are adult bicycles or children's bicycles. It only needs to adjust the distance between the rear wheel fixing mechanism 3 and the front wheel fixing mechanism 2 according to the different body lengths. The adjustment is convenient, and the structure is simple and stable.

[0044] It should be noted that the front wheel fixing mechanism 2 referred to in the present application is fixedly mounted on the base frame 1, and the front wheel fixing mechanism 2 cannot have the function of sliding relative to the base frame 1. It only refers to that the front wheel fixing mechanism 2 must have a state of being fixed to the base frame 1, so that the rear wheel fixing mechanism 3 moves forward and backward relative to the front wheel fixing mechanism 2 on the base frame 1 according to the position of the front wheel fixing mechanism 2, thereby adapting to the different distances between the central axis of the front and rear wheels of different models of bicycles.

[0045] Correspondingly, the side wall of the base frame 1 is provided with position marks 13 along its length direction to adapt to various bicycle models and sizes. In this embodiment, the position mark 13 corresponds to the axle center distance of the front and rear wheels of different bicycle models, and Arabic data is used to indicate the inch distance. In other embodiments, the position mark 13 can also be in Chinese, English or other symbols that can identify the bicycle model. After the user knows the bicycle model that needs to be fastened by the vehicle-mounted bicycle rack, the user slides the rear wheel fixing mechanism 3 on the base frame 1, adjusts the rear wheel fixing mechanism 3 to align with the position mark 13 on the side wall of the base frame 1 by hand-tightening the knob 351, and then installs the vehicle-mounted bicycle rack on the frame, which is more convenient to use.

[0046] Please refer to Figures 3 to 6 The front wheel fixing mechanism 2 includes a front wheel fixing frame 21, a front wheel fixing device 22 and a front wheel fixing seat 23. The front wheel fixing frame 21 is used to limit the front wheel of the bicycle in the left and right directions. When in use, the front wheel fixing frame 21 has fixing tubes on both sides of the front wheel, so that the front wheel of the bicycle can be directly or indirectly limited in the left and right directions of the front wheel. The front wheel fixing device 22 is adjustable and position-lockable and is mounted on the front wheel fixing frame 21 to fasten the wheel rim of the front wheel of the bicycle from top to bottom. In the description of this embodiment, the front wheel fixing device 22 is a part parallel to the front wheel fixing frame 21. In other embodiments, the front wheel fixing device 22 can also be a functional component of the front wheel fixing frame 21 for fastening the wheel rim of the front wheel of the bicycle, which is not limited here.

[0047] Please refer to Figure 4 The front wheel fixing seat 23 is provided with a front wheel hinge part that rotates with the rotating frame of the front wheel fixing frame 21, and a fixing frame limit stopper 231 is provided below the front wheel hinge part and near the middle of the base frame 1. The front wheel fixing frame 21 is provided with a fixing frame limit plate 211 extending from the hinge with the front wheel fixing frame 21, and the fixing frame limit stopper 231 is used to cooperate with the fixing frame limit plate 211 to limit the rotation angle of the front wheel fixing frame 21 relative to the front wheel fixing seat 23. The fixing frame limit plate 211 should not be limited to a plate-like structure, but also includes a tubular structure, a strip structure, etc., as long as it meets the function of being an extension of the front wheel fixing frame 21 and being able to abut against the fixing frame limit stopper 231 for rotation limit.

[0048] The position where the fixing frame limit block 231 is set will not affect the front wheel fixing frame 21 turning toward the middle of the base frame 1 to fold and store, and can cooperate with the fixing frame limit plate 211 to provide extremely strong limiting performance. It has a simple structure and is extremely easy to operate, and can be used directly after opening.

[0049] Furthermore, the front wheel fixing seat 23 includes a rotating bolt 232 and a rotating nut 233. The front wheel hinge portion of the front wheel fixing seat 23 is provided with a rotating through hole. The rotating bolt 232 passes through the front wheel fixing frame 21 and the rotating through hole and is fixed to the rotating nut 233. The rotating nut 233 is a locking nut or a self-locking nut. The setting and installation of the rotating bolt 232 are simple. By using the cooperation of the locking nut or the self-locking nut, the rotating bolt 232 and the rotating nut 233 are not easy to fall off, and the friction of rotation will not be increased due to over-tightening.

[0050] The bolt rod of the rotating bolt 232 includes a smooth portion and a threaded portion, the area where the smooth portion is located is adapted to the front wheel fixing frame 21 and the rotating through hole, and the bolt portion is adapted to the rotating nut 233 .

[0051] Furthermore, the fixing frame limit stop block 231 is located and cooperates with the fixing frame limit plate 211 to limit the front wheel fixing frame 21 at an angle of 95° to 150° relative to the base frame 1. The specific limit angle can be set according to the needs of the usage scenario. The greater the height distance between the fixing frame limit stop block 231 and the front wheel hinge part, the smaller the rotation angle, and the closer the fixing frame limit stop block 231 is to the middle of the base frame 1, the greater the rotation angle. In the present embodiment, the preferred angle is 110°.

[0052] The fixing frame limit stopper 231 and the fixing frame limit plate 211 can be fixedly arranged by welding, clamping or other methods.

[0053] In this embodiment, the fixing frame limit stopper 231 is integrally formed on the front wheel fixing seat 23, and the fixing frame limit plate 211 is welded to the front wheel fixing frame 21. Therefore, the fixing frame limit stopper 231 and the fixing frame limit plate 211 are integrally formed or welded, which is convenient to produce and has good firmness.

[0054] Furthermore, the front wheel fixing seat 23 also includes a front wheel sliding mounting block 234 that can be slidably matched in the bottom slide groove 12 of the base frame 1, and an adjusting bolt 235 for fixing and adjusting the distance between the front wheel sliding mounting block 234 and the body of the front wheel fixing seat 23. Therefore, the front wheel sliding mounting block 234 can be freely slidably set in the slide groove of the base frame 1. After determining the position where the front wheel fixing seat 23 needs to be installed relative to the base frame 1, the front wheel sliding mounting block 234 and the body of the front wheel fixing seat 23 can also be clamped and fixed in the slide groove of the base frame 1 by adjusting the bolt 235. Preferably, the bottom slide groove 12 of the base frame 1 is a T-shaped slide groove. In other embodiments, the distance between the front wheel sliding mounting block 234 and the body of the front wheel fixing seat 23 can also be fixed, and the distance is adapted to the slide groove of the base frame 1, and no re-tightening installation process is performed.

[0055] Furthermore, it also includes a front wheel fixing shell 24, which is installed on the outside of the front wheel fixing seat 23 and the base frame 1, and the middle part of the front wheel fixing shell 24 is concave and is provided with a shell mounting through hole, and the front wheel fixing shell 24 also includes a shell fixing bolt 241, and the front wheel fixing seat 23 is located at the bottom of the base frame 1. The position is provided with a threaded hole corresponding to the shell fixing bolt 241, and the shell fixing bolt 241 is used to pass through the shell mounting through hole and the through hole of the base frame 1 and be threadedly connected with the threaded hole of the front wheel fixing seat 23.

[0056] The use of the housing fixing bolt 241 can relatively fix the front wheel fixing mechanism 2 at a certain position of the base frame 1 without sliding. The housing mounting through hole is stepped, and the housing fixing bolt 241 is a countersunk bolt. The housing mounting through hole can make the bolt head of the housing fixing bolt 241 located in the groove, improving the aesthetics.

[0057] On the other hand, in a preferred embodiment, the depression in the middle of the front wheel fixing housing 24 is a front wheel accommodating groove for placing the front wheel, so it is more necessary that the bolt head of the housing fixing bolt 241 cannot be exposed.

[0058] Furthermore, the front wheel fixing housing 24 and the front wheel fixing device 22 are made of engineering plastics, and the front wheel fixing frame 21 and the front wheel fixing seat 23 are made of metal; thereby both strength and weight can be ensured.

[0059] Please refer to Figure 1 In this embodiment, a front wheel strap 25 is also included. The front wheel fixing frame 21 is a U-shaped tubular structure. One end of the front wheel strap 25 is arranged on the tubular structure on one side of the front wheel fixing frame 21, and Velcro is provided on the front and back sides of the front wheel strap 25, so that the front wheel fixing frame 21 can be tied and fixed to the base frame 1 when in use, and rolled up on the front wheel fixing frame 21 in a circle when stored.

[0060] The front wheel holder 22 can adopt various structures that can be used to lock the front wheel of the bicycle with the front wheel holder 21. In the present embodiment, the front wheel holder 22 includes a rack, a U-shaped fixing piece, a clamping block and a torsion spring. The rack is arranged along the extension direction of the front wheel holder 21 and is connected to the front wheel holder 21. The U-shaped fixing piece is slidably connected to the front wheel holder 21. The clamping block is rotatably connected to the U-shaped fixing piece through a torsion spring. The clamping block is clamped with the rack under the action of the torsion spring. For details, please refer to Chinese patent CN220947812U front wheel fixing device for a vehicle-mounted bicycle rack. The structure of the front wheel holder 22 can slide on the front wheel holder 21 on a larger scale, so that it can be clamped and fixed regardless of the diameter of the wheel.

[0061] refer to Figures 7 to 10 An anti-theft lock 5 is also installed on the base frame 1 of the vehicle-mounted bicycle rack, and the anti-theft lock 5 includes a lock seat 51 and a flexible lock strip 52.

[0062] The lock seat 51 includes a lock base 511 and a lock seat 512, a lock core 513 for locking and unlocking the lock base 511 and the lock seat 512, and a fixing component for mounting the lock base 511 on the base frame 1; a first mounting through hole is provided on the lock base 511, and the fixing component includes a first mounting bolt 514 for passing through the first mounting through hole to mount the lock base 511; the lock seat 512 is provided with an anti-theft shell 5121, and the anti-theft shell 5121 is used to cover the bolt head of the first mounting bolt 514 when the lock core 513 locks the lock base 511 and the lock seat 512; one end of the flexible lock strip 52 is connected to the lock seat 51, and the other end can pass through the frame, the base frame 1 and the bicycle, and then be locked and unlocked by the lock seat 51 through the lock core 513.

[0063] The anti-theft lock 5 of the present application utilizes the anti-theft shell 5121 of the lock seat 512 to cover or cap the bolt head of the first mounting bolt 514, and utilizes the flexible locking strip 52 to lock the frame, the base frame 1 and the bicycle together, thereby preventing the vehicle-mounted bicycle frame from being disassembled and stolen together, thereby enhancing the anti-theft performance of the vehicle-mounted bicycle frame.

[0064] In this embodiment, one end of the lock seat 512 is rotatably matched with the lock base 511, the keyhole 5131 and the lock tongue 5132 of the lock core 513 are arranged at the other end of the lock seat 512, and the lock base 511 is provided with a lock groove 5111 adapted to the lock tongue 5132.

[0065] Furthermore, the lock base 511 is provided with a second mounting through hole near the rotation position of the lock seat 512, and the fixing assembly further includes a second mounting bolt 516, and the bolt head of the second mounting bolt 516 is an inner angle type. Since the lock seat 512 is rotatably arranged above the lock base 511, when locked, the inner angle type bolt head is not easy to be opened by tools. In other preferred embodiments, when locked, the lock seat 512 covers the bolt head, and the spacing is less than 1 cm, so that the second mounting bolt 516 cannot be unscrewed by common tools on the market.

[0066] One end of the flexible locking strip 52 can be fixedly or movably connected to the lock base 51, and the other end can cooperate with the lock base 51, so that when the lock base 51 is locked, the other end is also locked to the lock base 51. There are many ways to implement it. For example, one end of the flexible locking strip 52 is a locking convex head, and the lock base 511 has a corresponding locking groove. When the locking convex head is inserted into the locking groove, the lock base 512 and the lock base 511 are locked by the lock core 513 to close the locking groove, so that the flexible locking strip 52 is locked.

[0067] In this embodiment, both ends of the flexible locking strip 52 are provided with rings 521 so as to be sleeved on the locking seat 512 and locked. It is easy to produce and has a beautiful appearance. The ring 521 of the flexible locking strip 52 is directly sleeved between the keyhole 5131 and the rotating part. In other embodiments, a groove can be specially set at one end of the keyhole 5131 of the locking seat 512, and the other end of the flexible locking strip 52 is sleeved into the groove to be locked.

[0068] In an embodiment, the lock slot 5111 and the first installation through hole are arranged adjacent to each other, so as to facilitate the integrated installation of the anti-theft shell 5121 and the keyhole 5131 .

[0069] The flexible lock strip 52 is preferably a steel wire rope or a metal chain. In this embodiment, a steel wire rope is selected, which has good anti-theft performance and is easy to use. To further improve the firmness, the lock seat 51 is made of metal material.

[0070] Furthermore, the fixing assembly also includes a sliding mounting plate 515 that can be slidably matched in the top slide groove 11 of the base frame 1. In this embodiment, the top slide groove 11 is T-shaped, and the sliding mounting plate 515 is provided with a threaded hole that matches the first mounting bolt 514. The first mounting bolt 514 can adjust the tightness between the lock seat 51 and the base frame 1 by adjusting the distance between the lock base 511 and the sliding mounting plate 515, thereby determining whether the anti-theft lock 5 slides freely relative to the base frame 1. According to the actual installation, both sides of the top slide groove 11 of the base frame 1 will be occupied by the wheel fixing mechanism. Therefore, no matter which state is, the lock seat 51 will not fall off the base frame 1. The preferred method of use is to first move it to the waiting position for locking, then adjust the first mounting bolt 514 to tighten it, and then close the lock seat 512 to lock it.

[0071] In other embodiments, the top slide groove 11 or the bottom slide groove 12 may also be earth-shaped, scholar-shaped, or gui-shaped, and the purpose is that various sliding mounting plates or sliding mounting blocks can be installed in the large width groove of the slide groove and slide, and are connected to other components outside the base frame 1 by bolts or columnar or other rod-shaped structures extending out of the small width groove, so that when the components outside the base frame 1 and the sliding mounting or sliding mounting block are close, they can be locked in the slide groove of the base frame 1. As is known in the art, the top slide groove 11 or the bottom slide groove 12 can have two side surfaces opened so that the sliding mounting plate can enter directly from the side, but also open an avoidance groove at both ends to facilitate the placement of the sliding assembly for sliding cooperation, which is not limited here.

[0072] The anti-theft lock 5 can be conveniently slid on the top slide groove 11 of the base frame 1 through the sliding mounting plate 515, so as to select a more convenient and safer position to lock the bicycle.

[0073] In other embodiments, another anti-theft lock for a vehicle-mounted bicycle rack (not shown in the figure) is provided, which is used to be installed on the base 1 of the vehicle-mounted bicycle rack, including: a lock seat 51 and a flexible lock strip 52, the lock seat 51 includes a lock base 511 and a lock seat 512, a lock core 513 for locking and unlocking the lock base 511 and the lock seat 512, and a fixing component for mounting the lock base 511 on the base 1; a first mounting through hole is provided on the lock base 511, and the fixing component includes a first mounting bolt 514 for passing through the first mounting through hole to mount the lock base 511, and the screw head of the first mounting bolt 514 is an inner angle type; the outer wall of the inner angle type is a circle that is not convenient to twist, and the interior is a shape including but not limited to a tightening groove-shaped straight line, a cross, an inner hexagon, a plum blossom, a pentagon, etc.

[0074] The lock base 512 is provided with an anti-theft cover, which is used to cover the upper surface of the bolt head of the first mounting bolt 514 when the lock core 513 locks the lock base 511 and the lock base 512. One end of the flexible lock strip 52 is connected to the lock base 51, and the other end can pass through the frame, the base 1 and the bicycle, and then be locked and unlocked by the lock base 51 through the lock core 513.

[0075] Please refer to Figures 11 to 13 The vehicle-mounted bicycle rack of the present application also has a detachable mounting and fixing mechanism 4 for mounting the base frame 1 on the frame. The detachable mounting and fixing mechanism 4 includes a first mounting seat 41, a second mounting seat 42, a lower base plate 43 and a detachable fastening assembly.

[0076] The first mounting seat 41 and the second mounting seat 42 are used to be installed and matched on the base frame 1; one end of the lower base plate 43 is hingedly matched with the first mounting seat 41, the middle part passes through the bottom of the frame, and the other end is fastened with the second mounting seat 42 through a detachable fastening assembly, thereby fixing the base frame 1 to the frame.

[0077] The lower base plate 43 includes a base plate hinge portion 431 for rotationally cooperating with the first mounting seat 41, a base plate fixing portion 432 for passing through the bottom of the frame, a base plate mounting portion 433 for detachably fixing with the second mounting seat 42, and a base plate bending portion 434 bent and extended from the base plate hinge portion 431 toward a side away from the base plate fixing portion 432, the base plate bending portion 434 is used to abut and cooperate with the base frame 1 or the first mounting seat 41 to limit the downward rotation angle of the lower base plate 43 relative to the base frame 1.

[0078] In this embodiment, the bottom plate bending portion 434 is used to directly abut and cooperate with the base frame 1 to achieve overall coordination of the vehicle-mounted bicycle frame, thereby simplifying the components. The specific requirement for the limit angle of the bottom plate 43 can be determined based on the height of the frame in the application scenario and the length of the bottom plate fixing portion 432 to obtain the angle range within which the bottom plate 43 is safe to rotate; and the limit angle of the bottom plate 43 can be controlled by the bending angle of the bottom plate bending portion 434 and the length of the bottom plate bending portion 434. The rule is that the more the angle of the bottom plate bending portion 434 is tilted upward relative to the bottom plate fixing portion 432, the smaller the angle at which the bottom plate 43 can rotate downward; the longer the bottom plate bending portion 434 is, the smaller the angle at which the bottom plate 43 can rotate downward.

[0079] In this embodiment, the bottom plate bending portion 434 and the bottom plate fixing portion 432 are substantially parallel, so that when the lower bottom plate 43 is fixed by the detachable fastening assembly, the bottom plate bending portion 434 and the base frame 1 are substantially parallel to each other. In other embodiments, the bottom plate bending portion 434 can be at other angles, and it is only necessary to coordinate with the length of the bottom plate bending portion 434 to control the rotation angle of the lower bottom plate 43 within the required range.

[0080] In another embodiment, the bottom plate bending portion 434 is used to directly abut against the first mounting seat 41, and a limit stopper is provided on the first mounting seat 41, and the limit stopper is used to abut against the bottom plate bending portion 434 to limit the angle of the lower bottom plate 43 rotating downward relative to the base frame 1. Thus, the detachable mounting and fixing mechanism 4 can independently complete the function of limiting the rotation angle.

[0081] Therefore, in this solution, since the lower base plate 43 and the first mounting seat 41 are hinged, it is only necessary to use a detachable fastening assembly to fasten or disassemble the second mounting seat 42 and the base plate mounting portion 433, which greatly reduces the workload during installation and disassembly; and through the setting of the base plate bending portion 434, the downward rotation angle of the lower base plate 43 relative to the base frame 1 is limited to prevent the lower base plate 43 from rotating downward relative to the base frame 1 and hitting the paint on the vehicle body to cause scratches or scratches during installation.

[0082] In order to increase the degree of freedom of the rotation angle range of the lower base plate 43, in this embodiment, the base plate mounting portion 433 is formed by bending the base plate fixing portion 432 obliquely upward, so that the lowest point where the lower base plate 43 hits the vehicle body is the base plate fixing portion 432 rather than the base plate mounting portion 433.

[0083] In order to prevent the base frame 1 from loosening after being fixed to the vehicle frame, the bottom plate hinge portion 431 , the bottom plate fixing portion 432 , and the bottom plate mounting portion 433 of the lower bottom plate 43 are in a concave shape adapted to the width of the vehicle frame.

[0084] Furthermore, in this embodiment, the detachable fastening assembly includes a fastening bolt 441 and a fastening nut 442, wherein the fastening nut 442 is fixedly disposed on the bottom plate mounting portion 433, and the fastening bolt 441 is used to pass through the through hole of the second mounting seat 42 and downwardly fasten with the fastening nut 442 thread. When installing and disassembling, it is only necessary to screw the fastening bolt 441 on the top of the second mounting portion, without the need for one hand or tool to reach between the narrow roof and the lower bottom plate 43 to clamp the fastening nut 442, which is convenient for installation, saving time and effort.

[0085] The fastening bolt 441 refers to a bolt that can be used to cooperate with a nut for fastening, or even a screw or a screw with a head diameter larger than the diameter of the threaded rod, etc. The fastening bolt 441 can be an external angle bolt in the form of a common external hexagon or an internal angle bolt in the form of an internal hexagon. In a preferred embodiment, the fastening bolt 44 can also be a quick-release bolt.

[0086] Thus, the bolt head of the fastening bolt 441 can be an outer hexagon or an inner hexagon or other shapes that are easy to twist, which are not limited here. In this example, preferably, the bolt head is a thin sheet-like inner hexagon structure.

[0087] Preferably, a bolt through hole is provided on the second mounting seat 42 . When the second mounting seat 42 is mounted on the base, the bolt through hole is located on the side of the base, thereby facilitating the rotation control of the fastening bolt 441 .

[0088] In this embodiment, bolt holes are provided on both sides of the second mounting seat 42, and the spacing between the bolt holes on both sides is greater than the width of the base frame 1; the fastening nut 442 is adapted and fixedly arranged on the bottom plate mounting portion 433, thereby further improving the fastening effect of the detachable mounting and fixing mechanism 4, and also facilitating installation and disassembly.

[0089] The fastening nut 442 can be welded or integrally formed on the bottom plate mounting portion 433 . In the present embodiment, the fastening nut 442 is disposed on the bottom surface of the bottom plate mounting portion 433 .

[0090] In other embodiments, the first mounting seat 41 and the second mounting seat 42 may be fixedly mounted or arranged on the base frame 1 , and the first mounting seat 41 and the second mounting seat 42 are arranged at a certain interval.

[0091] In this embodiment, in order to improve flexibility and match with the base frame 1 with a slide groove, the first mounting seat 41 and the second mounting seat 42 are both provided with a mounting seat sliding structure that slides with the base frame 1, and the specific shape of the mounting seat sliding structure is determined by the slide groove structure of the base frame 1. Through the design of the mounting seat sliding structure, the detachable mounting fixing mechanism 4 can slide freely on the base frame 1. When multiple detachable mounting fixing mechanisms 4 are required to be installed on the frame of a car corresponding to the same base frame 1, the different spacings between the mounting cross bars of different car frames can be applied; and when not installed, that is, before the second mounting seat 42 and the lower base plate 43 are not fixedly connected, the first mounting seat 41 and the second mounting seat 42 can also move relative to each other, and the installation is more flexible.

[0092] In one embodiment, the second mounting seat 42 includes a mounting seat body 422, a strip plate 423 welded on the mounting seat body 422, and a wide plate 424 welded on the strip plate 423, wherein the strip plate 423 and the wide plate 424 together form a mounting seat sliding structure of the second mounting seat 42. When the slide groove of the base frame 1 is T-shaped, the cross section of the mounting seat sliding structure is T-shaped; the wide plate 424, the strip plate 423 and the mounting seat body 422 are fixed integrally by welding, which reduces the casting cost and has good firmness. The mounting seat body 422 is a rectangular plate-shaped structure as a whole, and the two bolt through holes are provided at both ends of the mounting seat body 422. In other embodiments, the wide plate 424, the strip plate 423 and the mounting seat body 422 can also be fixed to each other by rivet fixing connection, bolt fixing connection, etc.

[0093] The mounting seat sliding structure of the first mounting seat 41 can be the same as that of the second mounting seat 42, and it is only necessary to replace the bolt through hole with a hinged portion hinged to the lower bottom plate 43. Preferably, in this embodiment, the bottom slide grooves 12 of the base frame 1 have two, which simplifies the structure and facilitates installation. The first mounting seat 41 can be composed of two T-shaped structural components, the horizontal plate of the T-shaped structural component slides freely in the bottom slide groove 12, and the vertical plate of the T-shaped structural component is provided with a hinged portion hinged to the lower bottom plate 43.

[0094] Please refer to Figures 14 to 18 The rear wheel fixing mechanism 3 includes a rear wheel fixing frame 31 , a rear wheel fixing seat 32 and an adjusting component 33 .

[0095] The rear wheel fixing frame 31 is used to limit the rear wheel of the bicycle in the left-right direction. In this embodiment, the entire frame is a U-shaped tubular structure. In other embodiments, the frame is not limited to other structures that can directly or indirectly limit the rear wheel of the bicycle in the left-right direction.

[0096] The rear wheel fixing seat 32 is used to be installed on the base frame 1. The rear wheel fixing seat 32 is provided with a rear wheel hinge part that rotates with the rear wheel fixing frame 31. In the present embodiment, the rear wheel hinge part is formed by opening a rotation through hole on the body of the rear wheel fixing seat 32 and rotating with a rotating pin or a bolt and nut. In other embodiments, other rotational cooperation structures can also be used.

[0097] The adjustment assembly 33 includes an adjustment rack 331 disposed on the rear wheel fixing frame 31, an adjustment sleeve 332 that slides relative to the length direction of the adjustment rack 331, an adjustment block 333 that is hinged on the adjustment sleeve 332 and can be engaged with the adjustment rack 331, a reset member used to drive the adjustment block 333 and the adjustment rack 331 to engage, and an adjustment table 334 located on the side of the rear wheel hinge away from the middle of the base frame 1. The reset member can be a torsion spring or other elastic member that can be reset, and the adjustment table 334 can be a part of the rear wheel fixing seat 32, or a separately arranged shell that is fixedly connected to the rear wheel fixing seat 32. The adjustment table 334 should be in a fixed position relationship with the rear wheel fixing seat 32.

[0098] An adjusting abutment block 3321 is provided on one side of the adjusting sleeve 332 close to the adjusting table 334 , and the adjusting abutment block 3321 is used to abut against the adjusting table 334 to limit the maximum angle of the rear wheel fixing frame 31 to flip outward relative to the base frame 1 .

[0099] The scheme is based on the use principle of the rear wheel fixing mechanism 3. The bicycle is placed on the base frame 1, the front wheel of the bicycle is located on the front wheel fixing frame, and the rear wheel of the bicycle is located on the rear wheel fixing frame 31. The rear wheel fixing frame 31 only needs to be limited and fixed on the side that is flipped outward relative to the middle part of the base frame 1. The flipping angle of the rear wheel fixing frame 31 relative to the base frame 1 is controlled by an adjustment component 33 with a simple structure, good firmness and easy adjustment. The maximum flipping angle of the rear wheel fixing frame 31 relative to the middle part of the base frame 1 can be increased by pressing the adjustment block 333 to control the adjustment sleeve 332 to slide upward relative to the adjustment rack 331. The maximum flipping angle of the rear wheel fixing frame 31 relative to the middle part of the base frame 1 can be reduced by controlling the adjustment sleeve 332 to slide downward relative to the adjustment rack 331.

[0100] In this embodiment, a rear wheel holder 36 is also included which is adjustable and position-lockable and is mounted on the rear wheel holder 31 . The rear wheel holder 36 is used to fasten the rim of the front wheel of the bicycle. The structure of the rear wheel holder 36 may refer to the front wheel holder 22 .

[0101] Furthermore, in order to enhance the firmness of the adjusting sleeve 332 so that the adjusting sleeve 332 will not fall off relative to the adjusting rack 331 when the rear wheel fixing frame 31 is subjected to force, in the present embodiment, the adjusting sleeve 332 is slidably sleeved on the adjusting rack 331 and the rear wheel fixing frame 31 where it is located.

[0102] Generally speaking, a vehicle-mounted bicycle rack will be set with an optimal flipping angle of the rear wheel fixing frame 31 when fixing a bicycle, and the optimal flipping angle is defined as a predetermined fixed angle. When the rear wheel fixing frame 31 is flipped to the predetermined fixed angle relative to the base frame 1, the bottom surface of the adjustment abutment block 3321 and the surface of the adjustment table 334 are in contact with each other; in this way, the contact area between the adjustment abutment block 3321 and the adjustment table 334 is maximized, and the torque force that can be withstood is also maximized.

[0103] Furthermore, the specific size of the predetermined fixed angle can be set according to different styles and models of vehicle-mounted bicycle racks, and its preferred range is 90° to 100°. In the present embodiment, the predetermined fixed angle is 90°.

[0104] The adjustment table 334 is provided with a table groove. When the rear wheel fixing frame 31 is flipped to a predetermined fixed angle relative to the base frame 1, the bottom surface of the adjustment abutment block 3321 fits with the inner plane of the table groove. In this embodiment, the width of the table groove is slightly larger than the width of the adjustment abutment block 3321.

[0105] A first arcuate surface is provided on the side wall of the table groove away from the middle of the base frame 1, and a second arcuate surface is provided on the side wall of the bottom of the adjustment abutment block 3321 away from the middle of the base frame 1; when the rear wheel fixing frame 31 is flipped relative to the base frame 1 to a larger angle than a predetermined fixed angle, the first arcuate surface abuts against the second arcuate surface, so that at different flipping angles, the adjustment abutment block 3321 and the adjustment table 334 have a larger contact area, thereby obtaining a greater abutment bearing force. Since the bicycle is generally at a predetermined fixed angle when locked; and the rear wheel fixing frame 31 continues to flip outward relative to the base frame 1 mainly to facilitate the placement and removal of the bicycle.

[0106] Please refer to Fig.18 When the bicycle is ready to be placed on the vehicle-mounted bicycle rack, the rear wheel fixing frame 31 is first turned outward by about 180° relative to the base frame 1, and then the bicycle is placed on the base frame 1. Then, the rear wheel fixing frame 31 is manually turned inward toward the middle of the base frame 1 to an angle that clamps the rear wheel of the bicycle, and the adjusting sleeve 332 is lowered by pressing the adjusting block 333, so that when the adjusting sleeve 3321 of the adjusting sleeve 332 abuts against the adjusting table 334, the eversion angle is fixed. Preferably, the eversion angle of the rear wheel fixing frame 31 at this time is exactly the predetermined fixed angle, that is, the bottom surface of the adjusting sleeve 3321 is in contact with the inner plane of the groove of the table groove. According to the user's habits, it can also be flipped to a large angle of 150°, 160° or more.

[0107] The rear wheel fixing seat 32 is provided with a rear wheel sliding assembly 34 for slidingly cooperating with the base frame 1, and a position control assembly 35 for releasing and strengthening the fixed relationship with the base frame 1. The position control assembly 35 controls the position fixation by a hand-tightening knob 351, so that the applicable bicycle frame can be adapted to different models of bicycles, thereby improving the scope of application and being extremely convenient to use.

[0108] In this embodiment, the position control component 35 also includes a rear wheel fixing plate 352, a sliding fixing plate 353 that can be slidably matched in the top slide groove of the base frame 1, and an adjustment fixing column 354 fixed on the sliding fixing plate 353 and passing through the rear wheel fixing plate 352, the upper part of the adjustment fixing column 354 is threadedly matched with the hand-tightening knob 351, and the hand-tightening knob 351 controls the sliding fixing plate 353 to continuously approach the rear wheel fixing plate 352, thereby clamping the top slide groove 11 of the base frame 1 to play a fixing role; wherein the rear wheel fixing plate 352 is a part of the rear wheel fixing seat 32 body, or is fixedly connected to the rear wheel fixing seat 32 body, so that after the sliding fixing plate 353 and the rear wheel fixing plate 352 clamp the base frame 1, the entire rear wheel fixing mechanism 3 is fixed at a specific position of the base frame 1 and can no longer slide relative to the base frame 1.

[0109] The rear wheel sliding assembly 34 includes a rear wheel sliding mounting block that can be slidably matched in the sliding groove of the base frame 1. The rear wheel sliding mounting block and the rear wheel fixing seat 32 are connected together and can slide synchronously.

[0110] Please refer to Figure 2 , Fig.14 and Fig.15 In this embodiment, two detachable mounting and fixing mechanisms 4 are installed on the base frame 1, one of which is freely slidably arranged on the base frame 1, and the second mounting seat of the other detachable mounting and fixing mechanism 4 is a component on the rear wheel fixing seat. In other embodiments, the second mounting seat 42 of one detachable mounting and fixing mechanism 4 is fixedly connected to the rear wheel fixing seat. All of them can meet the requirements that the detachable mounting and fixing mechanism 4 moves or is fixed in one position together with the rear wheel fixing mechanism 3.

[0111] In this embodiment, specifically, the rear wheel fixing seat 32 is provided with a through hole corresponding to the fastening nut 442 on the bottom plate mounting portion 433 of the lower bottom plate 43, and the through hole is used for the fastening bolt 441 to pass through and be threadedly connected with the fastening nut 442. By directly integrating the detachable mounting fixing mechanism with the rear wheel fixing seat 32, the rear wheel fixing mechanism 3 can be more stable when the vehicle-mounted bicycle rack is installed on the frame. When in use, first determine the front and rear wheel wheel wheelbases of the bicycle to be carried, and adjust and fix the rear wheel fixing seat 32 with the detachable mounting fixing mechanism 4 according to the position mark 13 according to the wheelbase; generally speaking, there are two automobile frames for installing the base frame 1, so another detachable mounting fixing mechanism 4 on the base frame 1 is slid to a position where the distance between the rear wheel fixing seat 32 corresponds to the distance between the frames, so that the base frame 1 is installed on the frame. Of course, the detachable mounting fixing mechanism 4 can also slide freely before installation, making the installation more convenient. If there are three or more automobile frames for installing the base frame 1, it is only necessary to match more sliding detachable installation and fixing mechanisms 4.

[0112] It should be noted that the description of the front wheel and rear wheel of the bicycle used in this application is a relative concept; in actual use, the front wheel of the bicycle can be placed in the rear wheel fixing mechanism 3, and the rear wheel of the bicycle can be placed in the front wheel fixing mechanism 2 for fixing. Alternatively, the front wheel fixing mechanism 2 of this application can be installed on a vehicle-mounted bicycle frame of other structures to fix the rear wheel, or the rear wheel fixing mechanism 3 of this application can be installed on a vehicle-mounted bicycle frame of other structures to fix the front wheel. And the front wheel fixing mechanism 2 in this application can be adjusted by angle limit through the adjustment component 33, and the partial structure of the front wheel fixing seat has the function of the second mounting seat and is detachably connected with the detachable mounting fixing mechanism 4, all of which belong to the protection scope of the present invention.

[0113] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A vehicle-mounted bicycle rack, used for installation on a vehicle frame, characterized in that: include: A base frame, the base frame is in an elongated strip shape and has a top slide groove arranged along its length direction; The front wheel fixing mechanism comprises a front wheel fixing seat fixedly mounted on the base frame, and a front wheel fixing frame which can rotate relative to the front wheel fixing seat and whose rotation angle range can be limited; The rear wheel fixing mechanism comprises a rear wheel fixing seat which is slidably matched with the top slide groove to adapt to different bicycle wheel wheelbases, and a rear wheel fixing frame which can rotate relative to the rear wheel fixing seat and the rotation angle range can be limited. The rear wheel fixing seat comprises a position control component for releasing and strengthening the fixed relationship with the base frame, and the position control component controls the position fixation by a hand-twisted knob.

2. The vehicle-mounted bicycle rack according to claim 1, characterized in that: The position control assembly also includes a rear wheel fixing plate, a sliding fixing plate that can be slidably matched in the top slide groove of the base frame, an adjustment fixing column fixed on the sliding fixing plate and passing through the rear wheel fixing plate, and the upper part of the adjustment fixing column is threadedly matched with the hand-tightening knob; the rear wheel fixing plate is a part of the rear wheel fixing seat body or is fixedly connected to the rear wheel fixing seat body.

3. The vehicle-mounted bicycle rack according to claim 2, characterized in that: It also includes a detachable mounting and fixing mechanism, including a first mounting seat slidably fitted on the base frame, a second mounting seat slidably fitted on the base frame, and a lower base plate with one end rotatably fitted with the first mounting seat, the other end of the lower base plate being detachably fixedly connected to the second mounting seat via a detachable fastening assembly, and there are at least two detachable mounting and fixing mechanisms, and the second mounting seat of one of the detachable mounting and fixing mechanisms is fixedly connected to the rear wheel fixing seat or is a part of the rear wheel fixing seat.

4. The vehicle-mounted bicycle rack according to claim 2, characterized in that: The lower base plate includes a base plate hinge portion, which is arranged in sequence and is used to rotate with the first mounting seat, a base plate fixing portion, which is used to pass through the bottom of the frame, a base plate mounting portion, which is used to be detachably fixed to the second mounting seat, and a base plate bending portion, which is bent and extended from the base plate hinge portion toward a side away from the base plate fixing portion, and the base plate bending portion is used to abut and cooperate with the base frame or the first mounting seat to limit the downward rotation angle of the lower base plate relative to the base frame.

5. The vehicle-mounted bicycle rack according to claim 1, characterized in that: The rear wheel fixing mechanism includes an adjusting component, which includes an adjusting rack arranged on the rear wheel fixing frame, an adjusting sleeve that slides relative to the length direction of the adjusting rack, an adjusting block that is hinged on the adjusting sleeve and can be engaged with the adjusting rack, a reset member for driving the adjusting block and the adjusting rack to engage, and an adjusting table located on the side of the rear wheel hinge away from the middle of the base frame; an adjusting abutment block is provided on the side of the adjusting sleeve close to the adjusting table, and the adjusting abutment block is used to abut and cooperate with the adjusting table to limit the maximum angle of the rear wheel fixing frame to flip outward relative to the base frame.

6. The vehicle-mounted bicycle rack according to claim 5, characterized in that: When the rear wheel fixing frame is flipped to a predetermined fixed angle relative to the base frame, the bottom surface of the adjusting abutment block is in contact with the surface of the adjusting table.

7. The vehicle-mounted bicycle rack according to claim 1, characterized in that: It also includes an anti-theft lock, which includes a lock seat and a flexible locking strip; the lock seat includes a lock base and a lock upper seat, a lock core for locking and unlocking the lock base and the lock upper seat, and a fixing component for mounting the lock base on a base frame; the lock base is provided with a first mounting through hole, and the fixing component includes a first mounting bolt for passing through the first mounting through hole to mount the lock base; the lock upper seat is provided with an anti-theft shell, which is used to cover the bolt head of the first mounting bolt when the lock core locks the lock base and the lock upper seat; one end of the flexible locking strip is connected to the lock seat, and the other end can pass through the frame, the base frame and the bicycle and then be locked and unlocked by the lock seat through the lock core.

8. The vehicle-mounted bicycle rack according to claim 7, characterized in that: The fixing assembly also includes a sliding mounting plate that can be slidably matched in the top sliding groove of the base frame, and the sliding mounting plate is provided with a threaded hole that is compatible with the first mounting bolt.

9. The vehicle-mounted bicycle rack according to claim 3, characterized in that: Position marks adapted to various bicycle models and sizes are arranged on the side walls of the base frame along the length direction thereof, so that the rear wheel fixing seat can be locked at a matching base frame position according to actual use requirements.

10. The vehicle-mounted bicycle rack according to claim 1, characterized in that: The front wheel hinged portion between the front wheel fixing frame and the front wheel fixing seat is higher than the rear wheel hinged portion between the rear wheel fixing frame and the rear wheel fixing seat, so that the front wheel fixing frame is pressed above the rear wheel fixing frame in the folded state; A front wheel strap is provided on the front wheel fixing frame, one end of the front wheel strap is arranged on a tubular structure on one side of the front wheel fixing frame, and Velcro is provided on the front and back sides of the front wheel strap, so that the front wheel fixing frame can be tied and fixed on the base frame when in use, and rolled up in a circle on the front wheel fixing frame when stored.

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