Foldable heavy-duty bicycle carrier

Abstract

The utility model discloses a kind of foldable heavy-duty bicycle bracket, including as the connecting basis of bracket and vehicle, responsible for the whole bracket is fixed on the plug-in rod of vehicle etc. The bridge effect of bearing connection the plug-in rod and rotating frame assembly provides the connecting frame of the basis for rotating frame assembly angle adjustment; Rotatable connection on the connecting frame, rotating frame assembly plays the role of bearing and angle adjustment; Fixedly installed on the rotating frame assembly, the support arm of accommodating and placing bicycle wheel; With the rotatable connection of support arm, foldable elbow arm assembly is used for fixing bicycle wheel. The utility model realizes folding by setting foldable elbow arm assembly, significantly saves storage space after folding, and is convenient to carry and store; Through setting rotating frame assembly, bicycle bracket realizes angle adjustment, and is convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of bicycle bracket technology, and in particular to a foldable heavy-duty bicycle bracket. Background Technology

[0002] With the growing popularity of green travel and the booming development of outdoor sports, bicycles, as a convenient and environmentally friendly mode of transportation and a popular piece of sports equipment, are seeing increasing demand for cross-scenario use. People not only frequently ride bicycles for daily commutes, but they have also become indispensable companions for weekend outings and long-distance trips. However, how to easily mount bicycles onto cars, RVs, and other modes of transportation to achieve rapid transitions between different scenarios has become a challenge for many cycling enthusiasts. Against this backdrop, bicycle racks have emerged, becoming a key device for solving the problem of co-location between bicycles and vehicles like cars and RVs. With bicycle racks, users can easily secure their bicycles to cars or RVs without worrying about damage or excessive space occupation during transport. This not only greatly improves travel convenience but also allows people to plan their trips more freely and fully enjoy the pleasure of cycling.

[0003] However, existing bicycle racks have gradually revealed some significant and unavoidable problems in actual use. These problems not only affect the user experience but also limit their application range to some extent. Among them, the most prominent and troubling is their lack of portability. For many cycling enthusiasts, a bicycle rack that is easy to carry and store is extremely important, but existing designs have obvious shortcomings in this regard. Specifically, most bicycle racks on the market currently adopt a one-piece structure. While this design ensures the stability of the rack to a certain extent, it cannot achieve a folding function. Because the rack cannot be folded, it occupies a lot of space when not in use, causing considerable inconvenience whether stored at home or loaded in the trunk of a vehicle. Especially during long-distance travel or when frequent movement is required, this design undoubtedly increases the burden on users and reduces the flexibility of use.

[0004] Furthermore, bicycle racks are typically installed at the rear of vehicles, and when a bicycle is placed on the rack, the distance between it and the trunk is often too close. This is especially problematic for vehicles with a spare tire in the rear door, as it easily leads to bumps and can interfere with the normal opening and closing of the trunk. Opening the trunk may be obstructed by the bicycle's position, potentially causing an accidental collision that could damage the bicycle or the vehicle's surface.

[0005] To address this issue, designing a bracket that combines foldability and angle adjustment is crucial. This new type of bicycle bracket must not only meet users' space-saving needs when not in use, facilitating storage and transport, but also feature angle adjustment. The bracket's tilt angle can be adjusted manually via a lever, preventing interference with the vehicle's trunk release and thus avoiding damage to the vehicle. Utility Model Content

[0006] The purpose of this utility model is to provide a foldable heavy-duty bicycle bracket to solve the technical problems existing in the prior art.

[0007] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0008] A foldable heavy-duty bicycle bracket includes a base for connecting the bracket to the vehicle, responsible for fixing the entire bracket to a carrier such as a car; a connecting frame that acts as a bridge between the base and a rotating frame assembly, providing a basis for adjusting the angle of the rotating frame assembly; a rotating frame assembly rotatably connected to the connecting frame, serving as a load-bearing and angle-adjusting component; a support arm fixedly mounted on the rotating frame assembly to accommodate and hold the bicycle wheel; and a foldable curved arm assembly rotatably connected to the support arm for fixing the bicycle wheel. The foldable curved arm assembly includes a curved arm rod, which is movably connected to a slider slidably mounted on a toothed rod with a locking mechanism via a stop rod. The curved arm rod folds and rotates around the connecting bolt at the short arm connecting end of the long arm of the support arm towards the support arm. The slider slides synchronously along the toothed rod to adapt to the position under the push of the stop rod, and the locking mechanism on the slider engages and locks with the tooth groove on the toothed rod. When the curved arm rod is folded close to the support arm, its free end, a short, drum-shaped pressure rod, engages with the positioning arm of the locking seat to complete the folding and fixing.

[0009] Preferably, a locking strip is slidably provided on the rotating frame side rod of the rotating frame assembly. Pulling the pull rod on the locking strip causes the locking strip to disengage from the locking slot of the connecting frame side plate and release the lock. Subsequently, the rotating frame side rod can rotate freely around the connecting pin. After adjusting to the target angle, the locking strip is locked into the corresponding angle slot, completing the angle locking and realizing the angle adjustment.

[0010] Preferably, the bent arm has an overall elongated rod structure, with one end clamped to the outside of the short arm connecting end of the support arm, and the other end being a free end clamped with a short pressure bar in the shape of a waist drum; a bending part is provided at a predetermined position near the connecting end of the bent arm, and a stop rod is movably installed in the bending part; the toothed rod is fixedly installed on the long arm of the support arm, and a uniformly distributed triangular tooth groove is provided on one side of its surface.

[0011] Preferably, the locking component has an overall "L"-shaped structure, including a locking end, a fixing end, and an operating end. The locking end has triangular teeth that can engage with the triangular tooth grooves of the toothed rod to achieve locking. The fixing end is rotatably fixed in the mounting groove of the slider by a pin, and a return spring is provided between the fixing end and the slider. The operating end has an outwardly bent operating piece in the middle. By pressing the operating piece, the slider is unlocked, which facilitates adjustment of the slider position. The locking seat serves as a positioning component when the bent arm is in the folded state. It includes a base and a positioning arm. The base is fixedly installed on the connecting block of the support arm, and the positioning arm is fixedly installed on the base. When the bent arm is folded, the short, drum-shaped pressure bar clamped at the free end of the bent arm can lock onto the positioning arm, thereby playing a role in positioning and fixing. The positioning arm of the locking seat can also be used to build a temporary riding platform for warm-up before riding.

[0012] Preferably, the end of the rotating frame side rod near the connecting frame is an arc end face, and a circular shaft hole is provided at the center of the arc end face for installing a connecting pin to form a rotatable connection with the connecting frame; on the inner side of the rotating frame side rod near the connecting frame, at the position corresponding to the bayonet, a non-through groove is provided along the length of the rod. The length of the groove is greater than the depth of the bayonet, allowing the end of the locking strip to be inserted into it, so that the locking strip can slide along the groove. When the locking strip slides to the position where the groove intersects with the bayonet, the locking strip can be engaged with the bayonet.

[0013] Preferably, a rotating frame crossbar is fixedly connected to the end of the rotating frame side rod away from the connecting frame. A pull rod hole is opened at the center of the rotating frame crossbar for the pull rod to pass through. The diameter of the pull rod hole is slightly larger than the diameter of the pull rod, allowing the pull rod to slide back and forth within the pull rod hole. One end of the pull rod passes through the pull rod hole and is fixedly connected to the middle of the locking strip. A handle is installed at the other end. A spring is sleeved on the outside of the pull rod, and the spring is arranged along the length of the pull rod, with one end abutting against the rotating frame crossbar and the other end abutting against the locking strip. A triangular support plate is fixedly installed on the upper part of the rotating frame side rod, and a pad is fixedly installed on the triangular support plate.

[0014] Preferably, the support arm includes two symmetrical parallel elongated rods. Each elongated rod has a fixed end and a short arm connecting end. The fixed end is clamped with a connecting block, and the fixed end is fixedly connected to the connecting block. The connecting block is fixedly installed on the upper part of the triangular support plate of the rotating frame assembly. The short arm connecting end is clamped with a cylindrical short rod, which is connected to the elongated rod by a connecting bolt. A support block is clamped at a certain position near the short arm connecting end of the elongated rod. The upper part of the support block has a "V" shaped groove for accommodating and supporting the bicycle wheel.

[0015] Preferably, the connecting frame is characterized by having an overall "U"-shaped frame structure, consisting of symmetrically distributed two side plates and a transverse connecting plate. The transverse connecting plate is a rectangular plate structure with a length that matches the spacing between the two side plates and a thickness slightly greater than that of the side plates. Threaded holes are provided on both ends of the plate, which are then fixedly connected to the sides of the two side plates by bolts to form a closed end of the "U" shape. A through rectangular hole is provided in the middle of the transverse connecting plate for inserting a rod and fixing it thereto.

[0016] Preferably, the two side plates are symmetrically distributed elongated plate structures, with one end (near the horizontal plate end) having an inclined end face, the inclined end face forming a 135° angle with the upper end face; the other end (away from the horizontal plate end) has an arc end face, with an arc-shaped slot on the arc end face, and a circular shaft hole at the center of the arc end face for installing a connecting pin for connecting to the rotating frame assembly; the outer side wall of the side plate has a cylindrical limiting protrusion near the lower part of the shaft hole, which can limit the maximum rotation angle of the rotating frame assembly when it contacts the edge of the rotating frame side rod of the rotating frame assembly.

[0017] Preferably, the plug is a rod-shaped structure with a plug-in part at one end that is adapted to the vehicle interface. The plug-in part is provided with a locking ball, which is made of wear-resistant steel or alloy material and has an elastic reset structure inside.

[0018] This utility model has the following advantages:

[0019] 1. This utility model provides a foldable curved arm assembly that includes a curved arm rod, a short pressure rod, a stop rod, a toothed rod, a slider, a locking piece, a locking end, a fixed end, an operating end, and a locking seat. Simply pressing the operating end of the locking piece unlocks the curved arm rod, allowing the curved arm to unfold or fold.

[0020] 2. This utility model enables the bicycle bracket to be angle-adjustable by setting a rotating frame assembly including rotating frame side rods, slide grooves, rotating frame crossbars, tie rod holes, connecting pins, locking strips, tie rods, springs, triangular support plates, and pads. Attached Figure Description

[0021] Figure 1 This is a front view schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0023] Figure 3 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0024] Figure 4 This is a side view of the overall structure of this utility model;

[0025] Figure 5 This is a bottom view of the overall structure of this utility model;

[0026] Figure 6 This is a partial three-dimensional structural schematic diagram of the present invention;

[0027] Figure 7 This is a partial structural disassembly diagram of the present invention;

[0028] Figure 8 This is a schematic diagram of the folded state of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10. Inserting the ball; 11. Locking the ball;

[0031] 20. Connecting frame; 21. Horizontal connecting plate; 22. Side plate; 23. Bayonet; 24. Limiting protrusion;

[0032] 30. Rotating frame assembly; 31. Rotating frame side rod; 311. Slide groove; 32. Rotating frame crossbar; 321. Tie rod hole; 33. Connecting pin; 34. Locking strip; 35. Tie rod; 36. Spring; 37. Triangular support plate; 38. Pad plate;

[0033] 40. Support arm; 41. Long boom; 42. Short boom; 43. Connecting block; 44. Support block; 45. Connecting bolt;

[0034] 50. Foldable bending arm assembly; 51. Bending arm rod; 52. Short pressure rod; 53. Stop rod; 54. Toothed rod; 55. Slider; 56. Clamping element; 561. Engaging end; 562. Fixed end; 563. Operating end; 57. Clamping seat. Detailed Implementation

[0035] To better understand the purpose, structure, and function of this utility model, a foldable heavy-duty bicycle bracket of this utility model will be described in further detail below with reference to the accompanying drawings.

[0036] like Figure 1-8 As shown, this utility model provides a foldable heavy-duty bicycle bracket, including a rod 10 that serves as the connection base between the bracket and the vehicle, responsible for fixing the entire bracket to a carrier such as a car; a connecting frame 20 that acts as a bridge connecting the rod 10 and a rotating frame assembly 30, providing a basis for adjusting the angle of the rotating frame assembly 30; a rotating frame assembly 30 that is rotatably connected to the connecting frame 20 and serves to bear loads and adjust the angle; a support arm 40 that is fixedly installed on the rotating frame assembly 30 and accommodates the bicycle wheel; and a foldable curved arm assembly 50 that is rotatably connected to the support arm 40 for fixing the bicycle wheel.

[0037] The insertion rod 10 is a rod-shaped structure with a plug-in part at one end that is adapted to a vehicle interface (such as a car trailer interface). The plug-in part is equipped with a locking ball 11, which is made of wear-resistant steel or alloy material and has an internal elastic reset structure. When the insertion rod 10 is inserted into the interface, the locking ball 11 pops out under the action of elastic force and locks into the groove in the interface to achieve automatic locking. When it is necessary to remove the insertion rod 10, press the unlock button at the interface, the locking ball 11 retracts, and the insertion rod 10 can be removed. The non-plug-in end of the insertion rod 10 is fixedly connected to the center of the transverse connecting plate 21 of the connecting frame 20. The insertion rod 10 is the core component for connecting the bicycle bracket to the vehicle, and plays the role of bearing the weight of the entire bracket and the bicycle and transferring it to the vehicle.

[0038] The connecting frame 20 has an overall "U" shaped frame structure. Its core consists of symmetrically distributed two side plates 22 and a transverse connecting plate 21. The transverse connecting plate 21 is a rectangular plate structure with a length adapted to the spacing between the two side plates 22 and a thickness slightly greater than the thickness of the side plates 22. Threaded holes are opened on both ends of the plate, which are then fixedly connected to the sides of the two side plates 22 with bolts, forming a closed "U" shape. A through rectangular hole is opened in the middle of the transverse connecting plate 21 for the insertion rod 10 to pass through and be fixedly connected to it. The two side plates 22 are symmetrically distributed elongated plate structures, with one end (near...) The side plate 22 has an inclined end face near the horizontal plate end, which forms a 135° angle with the upper end face; the other end (away from the horizontal plate end) has an arc end face, and an arc-shaped slot 23 is provided on the arc end face. There are three slots 23. A circular shaft hole is provided at the center of the arc end face for installing the connecting pin 33 connected to the rotating frame assembly 30; a cylindrical limiting protrusion 24 is provided on the outer side wall of the side plate 22 near the lower part of the shaft hole. When the limiting protrusion 24 contacts the edge of the rotating frame side rod 31 of the rotating frame assembly 30, it can limit the maximum rotation angle of the rotating frame assembly 30.

[0039] The rotating frame assembly 30 is the core structure that bears the weight of the bicycle and enables angle adjustment. It has a rectangular frame shape and is rotatably connected to the side plate 22 of the connecting frame 20 to achieve multi-angle positioning. It includes two symmetrical, parallel, elongated rotating frame side rods 31. The end of each rotating frame side rod 31 near the connecting frame 20 has an arc-shaped end face, with a circular shaft hole at the center of the arc-shaped end face for installing a connecting pin 33, thus forming a rotatable connection with the connecting frame 20. On the inner surface of the rotating frame side rod 31 near the connecting frame 20, there is a corresponding bayonet 23. At the position, a non-through groove 311 is provided along the length of the rod body. The length of the groove 311 is greater than the depth of the latch 23, allowing the end of the latching bar 34 to be inserted into it, so that the latching bar 34 can slide along the groove 311. When the latching bar 34 slides to the position where the groove 311 intersects with the latch 23, the latching bar 34 can be engaged with the latch 23, thereby preventing the rotational movement of the rotating frame side rod 31 relative to the connecting frame 20. A rotating frame crossbar 32 is fixedly connected to the end of the rotating frame side rod 31 away from the connecting frame 20. A groove is provided at the center of the rotating frame crossbar 32. A pull rod hole 321 is provided for the pull rod 35 to pass through. The diameter of the pull rod hole 321 is slightly larger than the diameter of the pull rod 35, allowing the pull rod 35 to slide back and forth within the pull rod hole 321. One end of the pull rod 35 passes through the pull rod hole 321 and is fixedly connected to the middle of the locking strip 34. A handle is installed at the other end. A spring 36 is sleeved on the outside of the pull rod 35. The spring 36 is arranged along the length of the pull rod 35, with one end abutting against the rotating frame crossbar 32 and the other end abutting against the locking strip 34. When the handle of the pull rod 35 is pulled, the locking strip 34 is moved along the direction of the pull rod 35. When the spring 36 is compressed and generates a restoring force, the locking bar 34 disengages from the latch 23, thereby releasing the lock on the rotating frame side rod 31. At this time, the rotating frame side rod 31 can rotate freely around the connecting pin 33 to achieve multi-angle adjustment. When the desired angle is reached, the handle is released, and under the restoring force of the spring 36, the pull rod 35 drives the locking bar 34 to reset, and the locking bar 34 re-engages into the corresponding latch 23, completing the positioning and locking. A triangular support plate 37 is fixedly installed on the upper part of the rotating frame side rod 31, and a pad 38 is fixedly installed on the triangular support plate 37.

[0040] The support arm 40, as the core component directly supporting the bicycle wheel, is fixedly installed on the upper part of the triangular support plate 37 of the rotating frame assembly 30, arranged symmetrically on the left and right. It includes two symmetrical parallel long strip-shaped arm rods 41. Each long arm rod 41 includes a fixed end 562 and a short arm connecting end. The fixed end 562 is clamped with a connecting block 43, and the fixed end 562 is fixedly connected to the connecting block 43. The connecting block 43 is fixedly installed on the upper part of the triangular support plate 37 of the rotating frame assembly 30. The short arm connecting end is clamped with a cylindrical short arm rod 42, and the short arm rod 42 is connected to the long arm rod 41 by a connecting bolt 45. A support block 44 is clamped at a certain position near the short arm connecting end of the long arm rod 41. The upper part of the support block 44 has a "V" shaped groove for accommodating and supporting the bicycle wheel. The short arm connecting end of the long arm rod 41 is rotatably connected to the folding arm assembly bending arm rod 51 by a connecting bolt 45.

[0041] The foldable curved arm assembly 50, as an important part of fixing the bicycle wheel, is rotatably connected to the short arm connection end of the support arm 40 via connecting bolts 45. Its core structure includes a pair of symmetrical parallel curved arm rods 51. The curved arm rods 51 are generally long and narrow rod structures. One end is clamped to the outside of the short arm connection end of the support arm 40 and is rotatably connected to it via connecting bolts 45. The other end is a free end with a short, drum-shaped pressure rod 52 clamped in place. A bending part is provided at a predetermined position near the connection end of the curved arm rod 51, and the bending part is movable. A stop rod 53 is installed to control the folding or unfolding state of the bending arm 51. One end of the stop rod 53 is movably connected to the bent part of the bending arm 51, and the other end is connected to the slider 55, which is equipped with a locking piece 56, via a pin, allowing it to rotate relative to the slider 55. The slider 55 is slidably mounted on a toothed rod 54, which is fixedly mounted on the long arm 41 of the support arm 40. One side of the toothed rod 54 has evenly distributed triangular toothed grooves for engaging with the triangular teeth of the locking piece 56 on the slider 55, thereby allowing the bending arm 51 to be folded or unfolded at different angles. The locking function is as follows: The locking component 56 has an overall "L" shaped structure, including a locking end 561, a fixing end 562, and an operating end 563. The locking end 561 has triangular teeth that can cooperate with the triangular tooth groove of the toothed rod 54 to achieve locking. The fixing end 562 is rotatably fixed in the mounting groove of the slider 55 by a pin, and a return spring 36 is provided between it and the slider 55. The operating end 563 has an outwardly bent operating piece in the middle. By pressing the operating piece, the slider 55 is unlocked, which facilitates the adjustment of the slider 55 position. The locking base 57 serves as... The positioning component of the bent arm 51 in the folded state includes a base and a positioning arm. The base is fixedly installed on the connecting block 43 of the support arm 40, and the positioning arm is fixedly installed on the base. When the bent arm 51 is folded, the waist-drum-shaped short pressure bar 52 clamped at the free end of the bent arm 51 can be locked onto the positioning arm, thereby playing a role in positioning and fixing. In addition, the positioning arm of the clamp 57 can also be connected to the bicycle front fork with the front wheel removed, and cooperate with the bicycle rear wheel roller to build a temporary riding platform for warm-up before riding.

[0042] In use, first insert the bracket rod 10 into the vehicle trailer interface and lock it. Press the operating plate of the operating end 563 of the locking piece 56 to rotate the locking piece 56 around the pin, so that the engaging end 561 disengages from the triangular tooth groove of the toothed rod 54 and unlocks the slider 55. At this time, the bent arm rod 51 connected to the slider 55 by the stop rod 53 can rotate freely. Then rotate the bent arm rod 51 around the connecting bolt 45 between the bent arm rod 51 and the support arm 40 to a suitable angle, unfold the bent arm rod 51, and after the bent arm rod 51 is unfolded, The bicycle wheel is placed on the support block 44 of the support arm 40; after placement, the curved arm 51 is rotated in the opposite direction to fit onto both sides of the bicycle wheel. When the short pressure bar 52 in the shape of a waist drum rotates together with the curved arm 51 and presses against the bicycle tire, the operating piece of the operating end 563 of the locking piece 56 is released. Under the action of the return spring 36, the locking end 561 of the locking piece 56 re-engages with the triangular tooth groove of the toothed rod 54, thereby locking the position of the curved arm 51 and ensuring that the bicycle wheel is firmly fixed. When the bracket needs to be folded, the bent arm 51 is rotated and folded around the connecting bolt 45 at the short arm connecting end of the long arm 41 of the support arm 40 towards the support arm 40. The slider 55 is pushed by the stop rod 53 and slides synchronously along the toothed rod 54 to adapt to the position. Under the action of the return spring 36, the engaging end 561 of the clip 56 re-engages and locks with the triangular tooth groove of the toothed rod 54. When the bent arm 51 is folded close to the support arm 40, the waist-drum-shaped short pressure rod 52 at its free end is engaged with the positioning arm of the card seat 57 to complete the folding and fixation, so as to realize the stable storage of the bent arm 51, thereby reducing the overall space occupied by the bracket and facilitating transportation or storage. When the angle needs to be adjusted, pull the lever 35 to disengage the locking strip 34 from the slot 23 of the side plate 22 of the connecting frame 20. After the rotating frame side rod 31 rotates freely around the connecting pin 33 to the desired angle, release the lever 35. The restoring force of the spring 36 causes the locking strip 34 to re-engage in the corresponding slot 23, thus completing the angle adjustment and locking.

[0043] Additionally, after installing the bracket onto the vehicle, the front wheel of the bicycle can be removed if necessary. Then, the bicycle fork with the front wheel removed can be securely connected to the positioning arm of the bracket holder 57. After completing this step, gently place the rear wheel of the bicycle onto the rollers, ensuring that the rear wheel makes smooth contact and is in the correct position. In this way, the bracket and rollers together create a temporary bicycle trainer. Although simple, this trainer can be used to simulate a real cycling environment, serving as a warm-up exercise before a formal ride to help cyclists better prepare for exercise and reduce the risk of sports injuries.

[0044] The beneficial effects of this utility model are:

[0045] 1. This utility model features a foldable curved arm assembly 50, which includes a curved arm rod 51, a short pressure rod 52, a stop rod 53, a toothed rod 54, a slider 55, a locking piece 56, a locking end 561, a fixed end 562, an operating end 563, and a locking seat 57. By simply pressing the operating end 563 of the locking piece 56, the curved arm rod 51 can be unlocked to unfold or fold the curved arm. After folding, it significantly saves storage space and is convenient to carry and store.

[0046] 2. This utility model, by setting up a rotating frame assembly 30 including a rotating frame side rod 31, a sliding groove 311, a rotating frame crossbar 32, a pull rod hole 321, a connecting pin 33, a locking strip 34, a pull rod 35, a spring 36, a triangular support plate 37, and a pad 38, enables the bicycle rack to achieve angle adjustment, thereby avoiding collisions caused by the bicycle being too close to the vehicle's trunk during transportation. It can also be temporarily tilted to facilitate opening or closing the vehicle's tailgate, making it convenient for people to use.

[0047] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," 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 utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A foldable heavy-duty bicycle bracket, comprising: a rod (10) serving as the connection base between the bracket and the vehicle, responsible for fixing the entire bracket to the vehicle carrier; a connecting frame (20) acting as a bridge connecting the rod (10) and a rotating frame assembly (30), providing a base for angle adjustment of the rotating frame assembly (30); a rotating frame assembly (30) rotatably connected to the connecting frame (20), serving as a load-bearing and angle-adjusting component; a support arm (40) fixedly mounted on the rotating frame assembly (30) for accommodating and placing bicycle wheels; and a foldable curved arm assembly (50) rotatably connected to the support arm (40) for fixing bicycle wheels, characterized in that: The foldable arm assembly (50) includes an arm rod (51), which is movably connected to a slider (55) on a toothed rod (54) by a stop rod (53) and a clip (56) is slidably mounted on the slider (54). The arm rod (51) rotates and folds around the connecting bolt (45) at the short arm connection end of the long arm rod (41) of the support arm (40) towards the support arm (40). The slider (55) slides synchronously along the toothed rod (54) to the appropriate position under the push of the stop rod (53). The clip (56) on the slider (55) engages and locks with the tooth groove on the toothed rod (54). When the arm rod (51) is folded close to the support arm (40), the waist-drum shaped short pressure rod (52) at its free end engages with the positioning arm of the bracket (57) to complete the folding and fixing.

2. The foldable heavy-duty bicycle bracket according to claim 1, characterized in that, A locking strip (34) is slidably provided on the rotating frame side rod (31) of the rotating frame assembly (30). Pulling the pull rod (35) on the locking strip (34) causes the locking strip (34) to disengage from the locking slot (23) of the side plate (22) of the connecting frame (20) and release the lock. Then the rotating frame side rod (31) can rotate freely around the connecting pin (33). After adjusting to the target angle, the locking strip (34) is locked into the corresponding angle locking slot (23) to complete the angle locking and realize the angle adjustment.

3. The foldable heavy-duty bicycle bracket according to claim 1, characterized in that, The curved arm (51) is a long strip-shaped rod structure. One end of it is clamped on the outside of the short arm connecting end of the support arm (40), and the other end is a free end clamped with a short pressure rod (52) in the shape of a waist drum. A bending part is provided at a predetermined position near the connecting end of the curved arm (51), and a stop rod (53) is movably installed on the bending part. The toothed rod (54) is fixedly installed on the long arm (41) of the support arm (40), and a uniformly distributed triangular tooth groove is provided on one side of its surface.

4. A foldable heavy-duty bicycle bracket according to claim 3, characterized in that, The locking element (56) has an overall "L" shape structure, including a locking end (561), a fixed end (562), and an operating end (563). The locking end (561) has triangular teeth that can engage with the triangular toothed groove of the toothed rod (54) to achieve locking. The fixed end (562) is rotatably fixed in the mounting groove of the slider (55) by a pin, and a return spring (36) is provided between it and the slider (55). The operating end (563) has an outwardly bent operating piece in the middle. By pressing the operating piece, the slider (55) can be unlocked, which facilitates adjustment of the slider. The position of block (55); the card seat (57) is a positioning component when the bent arm (51) is in the folded state. It includes a base and a positioning arm. The base is fixedly installed on the connecting block (43) of the support arm (40), and the positioning arm is fixedly installed on the base. When the bent arm (51) is folded, the waist drum-shaped short pressure bar (52) clamped at the free end of the bent arm (51) can be clamped on the positioning arm, thereby playing the role of positioning and fixing. The positioning arm of the card seat (57) can also participate in the construction of a temporary riding platform for warm-up before riding.

5. A foldable heavy-duty bicycle bracket according to claim 2, characterized in that, The end of the rotating frame side rod (31) near the connecting frame (20) is an arc end face. A circular shaft hole is provided at the center of the arc end face for installing the connecting pin (33) so as to form a rotatable connection with the connecting frame (20). On the inner side of the rotating frame side rod (31) near the connecting frame (20), at the position corresponding to the bayonet (23), an unthrough groove (311) is provided along the length of the rod. The length of the groove (311) is greater than the depth of the bayonet (23), so that the end of the locking strip (34) can be inserted into it, so that the locking strip (34) can slide along the groove (311). When the locking strip (34) slides to the position where the groove (311) intersects with the bayonet (23), the locking strip (34) can be locked into the bayonet (23).

6. A foldable heavy-duty bicycle bracket according to claim 5, characterized in that, A rotating frame crossbar (32) is fixedly connected to one end of the rotating frame side rod (31) away from the connecting frame (20). A pull rod hole (321) is provided at the center of the rotating frame crossbar (32) for the pull rod (35) to pass through. The diameter of the pull rod hole (321) is slightly larger than the diameter of the pull rod (35), and the pull rod (35) can slide back and forth in the pull rod hole (321). One end of the pull rod (35) passes through the pull rod hole (321) and is fixedly connected to the middle of the locking strip (34). A handle is installed at the other end. A spring (36) is sleeved on the outside of the pull rod (35). The spring (36) is arranged along the length of the pull rod (35), with one end abutting against the rotating frame crossbar (32) and the other end abutting against the locking strip (34). A triangular support plate (37) is fixedly installed on the upper part of the rotating frame side rod (31), and a pad plate (38) is fixedly installed on the triangular support plate (37).

7. A foldable heavy-duty bicycle bracket according to claim 6, characterized in that, The support arm (40) includes two symmetrical parallel long bar rods (41). The long bar rod (41) includes a fixed end (562) and a short arm connecting end. The fixed end (562) is clamped with a connecting block (43). The fixed end (562) is fixedly connected to the connecting block (43). The connecting block (43) is fixedly installed on the upper part of the triangular support plate (37) of the rotating frame assembly (30). The short arm connecting end is clamped with a cylindrical short bar rod (42). The short bar rod (42) is connected to the long bar rod (41) by a connecting bolt (45). A support block (44) is clamped at a certain position near the short arm connecting end of the long bar rod (41). The upper part of the support block (44) is provided with a "V" shaped groove for accommodating and supporting bicycle wheels.

8. A foldable heavy-duty bicycle bracket according to claim 7, characterized in that, The connecting frame (20) is in the form of a "U" shaped frame structure, consisting of two symmetrically distributed side plates (22) and a transverse connecting plate (21). The transverse connecting plate (21) is a rectangular plate structure with a length that matches the spacing between the two side plates (22) and a thickness that is slightly greater than the thickness of the side plates (22). Threaded holes are opened on both ends of the plate and it is fixedly connected to the sides of the two side plates (22) by bolts to form a closed end of the "U" shape. A rectangular through hole is opened in the middle of the transverse connecting plate (21) for inserting the rod (10) and fixing it to the rod.

9. A foldable heavy-duty bicycle bracket according to claim 8, characterized in that, The two side plates (22) are symmetrically distributed elongated plate structures. One end of the side plate (22) near the transverse connecting plate (21) is provided with an inclined end face, which forms a 135° angle with the upper end face. The other end of the side plate (22) away from the transverse connecting plate (21) is provided with an arc end face. An arc-shaped slot (23) is provided on the arc end face. A circular shaft hole is provided at the center of the arc end face for installing a connecting pin (33) connected to the rotating frame assembly (30). A cylindrical limiting protrusion (24) is provided on the outer side wall of the side plate (22) near the lower part of the shaft hole. When the limiting protrusion (24) contacts the edge of the rotating frame side rod (31) of the rotating frame assembly (30), it can limit the maximum rotation angle of the rotating frame assembly (30).

10. A foldable heavy-duty bicycle carrier according to claim 9, characterized in that, The plug (10) is a rod-shaped structure with a plug-in part at one end that is adapted to the vehicle interface. The plug-in part is provided with a locking ball (11), which is made of wear-resistant steel or alloy material and has an elastic reset structure inside.

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