Foldable vehicle-mounted bicycle frame

Abstract

The utility model relates to the field of vehicle-mounted bicycle frames, and provides a foldable vehicle-mounted bicycle frame which comprises a supporting frame and a vertical frame for fixing a bicycle beam, and the supporting frame is connected with a trailer ball through an overturning and dumping mechanism. The vertical frame is connected with the supporting frame through a first folding mechanism; tire bearing frames and vehicle tail headlamp frames are installed on the supporting frame, the tire bearing frames are installed on the two sides of the supporting frame through second folding mechanisms, and the vehicle tail headlamp frames are installed on the two sides of the supporting frame through third folding mechanisms. According to the utility model, the supporting frame is connected with the trailer ball by arranging the overturning and dumping mechanism, so that the whole supporting frame on which a bicycle is mounted can be overturned downwards by a set angle, and the vertical frame is separated from the trunk by a certain distance, so that the trunk can be freely opened and closed without detaching the bicycle; meanwhile, the vertical frame, the tire bearing frame and the parking space headlamp frame are all arranged to be foldable mechanisms and can be folded and stored when not in use, the occupied space is small, and more convenience and practicability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of vehicle-mounted bicycle frame, especially a foldable vehicle-mounted bicycle frame. BACKGROUND

[0002] With the acceleration of urban life rhythm, more and more cycling enthusiasts choose to ride in the suburbs during holidays, and it will waste a lot of time and energy if they ride directly to the suburbs, and the traffic conditions do not allow it; therefore, more and more people choose to load bicycles to the suburbs and then ride; however, due to the small volume of the trunk of a family car, most of them cannot meet the demand of loading bicycles, so vehicle-mounted bicycle fixing frames appear on the market; the existing vehicle-mounted bicycle fixing frames are roughly divided into rear tail fixing frames and roof fixing frames, wherein the rear tail fixing frame will affect the opening of the trunk after the bicycle is installed, and the bicycle needs to be removed to open the trunk, which is time-consuming and laborious. UTILITY MODEL CONTENTS

[0003] The utility model provides a foldable vehicle-mounted bicycle frame, which is connected with the trailer ball through the turnover dumping mechanism, can overturn the support frame with the installed bicycle by a certain angle, makes the stand away from the trunk by a certain distance, and can freely open and close the trunk without removing the bicycle; meanwhile, the stand, the tire support frame and the parking lamp frame are all foldable mechanisms, which can be folded and stored when not in use, occupy small space and are more convenient and practical.

[0004] The technical scheme of the utility model is as follows:

[0005] A foldable vehicle-mounted bicycle frame is installed on the trailer ball at the rear end of a car.

[0006] The support frame is connected with the trailer ball through a turnover dumping mechanism.

[0007] The stand is connected with the support frame through a first folding mechanism.

[0008] The support frame is provided with a tire support frame and a tail lamp frame, the tire support frame is installed on both sides of the support frame through a second folding mechanism, and the tail lamp frame is installed on both sides of the support frame through a third folding mechanism.

[0009] The outer side of the support frame is provided with a license plate mounting plate.

[0010] Further, the turnover dumping mechanism comprises a first hinged plate, a second hinged plate, a rotating shaft, a hand lever, a hinged shaft, a limiting shaft, a linkage plate and a compression spring.

[0011] The first hinged plate is installed on the connecting end of the trailer ball.

[0012] The second hinged plate is mounted on the connecting end of the support frame;

[0013] The first hinged plate and the second hinged plate are connected by the rotating shaft;

[0014] The hinged shaft is mounted on the second hinged plate;

[0015] The hand lever is mounted on the hinged shaft;

[0016] The first hinged plate is provided with an open slot;

[0017] The second hinged plate is provided with a limiting slot;

[0018] The limiting shaft is mounted in the limiting slot and the open slot;

[0019] One end of the linkage plate is connected with the limiting shaft, and the other end is connected with the hand lever;

[0020] One end of the compression spring is mounted on the limiting shaft, and the other end is mounted on the rotating shaft.

[0021] Further, the first hinged plate is provided with one or more;

[0022] Correspondingly, the second hinged plate is provided with one or more.

[0023] Further, the first folding mechanism comprises a first connecting plate, a first connecting hole, a second connecting hole, a connecting screw and a fastening nut;

[0024] The first connecting plate is mounted on the support frame;

[0025] The first connecting hole is provided on the first connecting plate;

[0026] The second connecting hole is provided on the connecting end of the stand;

[0027] The connecting screw penetrates the first connecting hole and the second connecting hole;

[0028] The fastening nut is connected with the threaded end of the connecting screw.

[0029] Further, the first connecting plate and the support frame are simultaneously provided with an angle iron.

[0030] Further, the stand comprises one or more connecting ends, and correspondingly, each connecting end is connected with the support frame by a set of the first folding mechanism.

[0031] Further, the second folding mechanism comprises a first connecting seat and a first connecting shaft;

[0032] The first connecting seat is installed on the support frame;

[0033] The first connecting seat is provided with a first connecting lug and a second connecting lug, the first connecting lug is provided with a first rotating hole, and the second connecting lug is provided with a second rotating hole;

[0034] The first connecting shaft is installed at the connecting end of the tire supporting frame;

[0035] The two ends of the first connecting shaft are respectively hinged to the first rotating hole and the second rotating hole.

[0036] Further, the second folding mechanism further comprises a supporting shaft and a clasp;

[0037] The supporting shaft is installed on the side of the support frame;

[0038] The clasp is installed at the bottom end of the support frame and is buckled at the top end of the supporting shaft;

[0039] The two ends of the supporting shaft are provided with supporting grooves, and the bottom side of the tire supporting frame is clamped in the supporting grooves.

[0040] Further, the tire supporting frame is provided with one or more groups, each group is provided with two sets, and the two sets of tire supporting frames in each group are symmetrically installed on the side of the support frame;

[0041] Each set of tire supporting frames is installed on the side of the support frame through a group of first folding mechanisms.

[0042] Further, the third folding mechanism comprises a second connecting plate, a first folding hole, a second folding hole, a third folding hole, a folding pin, a first limiting hole, a second limiting hole, a first limiting pin and a second limiting pin;

[0043] The second connecting plate is installed on the side of the support frame; the first folding hole and the third folding hole are symmetrically arranged on the opposite two side walls of the second connecting plate; the second folding hole is arranged on the tail lamp frame; and the folding pin is simultaneously installed in the first folding hole, the second folding hole and the third folding hole;

[0044] The first limiting hole and the second limiting hole are symmetrically arranged on the opposite side walls of the second connecting plate; the second limiting hole is arranged on the tail lamp frame; and the first limiting pin and the second limiting pin are simultaneously respectively matched with or separated from the first limiting hole and the second limiting hole.

[0045] Further, the two sides of the support frame are provided with tail lamp frames.

[0046] The utility model discloses a set up overturning and dumping mechanism to connect the support frame with the trailer ball, can whole the support frame of installing the bicycle overturn the angle set down, make the vertical frame leave the trunk certain distance, thereby can also open and close the trunk freely without disassembling the bicycle, the vertical frame, tire support frame and parking lamp frame are all set up as collapsible mechanism, can be folded and stored when idle, and the occupied space is small, and it is more convenient and practical. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the embodiment or prior art description needed to use the drawing make a simple introduction, obviously, the drawing in the following description only some embodiments of the utility model, for the ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0048] Figure 1 It is a kind of folding vehicle-mounted bicycle frame's three-dimensional structure schematic view in the embodiment of the utility model;

[0049] Figure 2 It is Figure 1 It is a kind of overturning and dumping mechanism's partial structure schematic view of folding vehicle-mounted bicycle frame shown in figure 1;

[0050] Figure 3 It is Figure 1 、 Figure 2 It is a kind of overturning and dumping mechanism's partial structure schematic view of folding vehicle-mounted bicycle frame shown in figure 2;

[0051] Figure 4 It is Figure 1 It is a kind of vertical frame's partial structure schematic view of folding vehicle-mounted bicycle frame shown in figure 3;

[0052] Figure 5 It is Figure 1 It is a kind of vertical frame and first folding mechanism's structure schematic view of folding vehicle-mounted bicycle frame shown in figure 4;

[0053] Figure 6 It is Figure 1 It is a kind of tire support frame and second folding mechanism's structure schematic view of folding vehicle-mounted bicycle frame shown in figure 5;

[0054] Figure 7 It is Figure 1 It is a kind of tail lamp frame and third folding mechanism's structure schematic view of folding vehicle-mounted bicycle frame shown in figure 6

[0055] Explanation of reference signs: trailer ball 1; support frame 2; license plate mounting plate 21; wheel beam fixing stand 3; tire support frame 4; tail lamp frame 5; turnover dumping mechanism 6; first hinged plate 61; open slot 611; second hinged plate 62; limiting slot 621; rotating shaft 63; hand lever 64; hinged shaft 65; limiting shaft 66; linkage plate 67; compression spring 68; first folding mechanism 7; first connecting plate 71; first connecting hole 72; second connecting hole 73; connecting screw 74; fastening nut 75; second folding mechanism 8; first connecting seat 81 and first connecting shaft 82; first connecting lug 83; second connecting lug 84; first rotating hole 85; second rotating hole 86; support shaft 87; clasp 88; third folding mechanism 9; second connecting plate 91; first folding hole 92; second folding hole 93; third folding hole 94; folding pin 95; first limiting hole 96; second limiting hole 97; first limiting pin 98; second limiting pin 99. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0057] In the embodiments of the present application, see Figures 1-7 A foldable vehicle-mounted bicycle rack is installed on a trailer ball 1 at the rear end of a vehicle; the foldable vehicle-mounted bicycle rack comprises a support frame 2 and a wheel beam fixing stand 3, the support frame 2 is provided with a tire support frame 4 and a tail lamp frame 5, and the outer side of the support frame 2 is provided with a license plate mounting plate 21.

[0058] In the embodiments of the present application, see Figures 1-7 The support frame 2 is connected with the trailer ball 1 through a turnover dumping mechanism 6, after the bicycle is installed, the bicycle and the support frame 2 can be turned down as a whole through the turnover dumping mechanism 6, so that the stand 3 is away from the trunk of the vehicle, and the trunk is convenient to open and close;

[0059] The turnover dumping mechanism 6 comprises a first hinged plate 61, a second hinged plate 62, a rotating shaft 63, a hand lever 64, a hinged shaft 65, a limiting shaft 66, a linkage plate 67 and a compression spring 68;

[0060] The first hinged plate 61 is installed at the connecting end of the trailer ball, and is generally welded at the connecting end of the support frame 2; the second hinged plate serves as a connecting plate, and the connecting strength between the second hinged plate and the trailer ball 1 is ensured; the second hinged plate 62 is installed at the connecting end of the support frame 2, and is generally welded at the connecting end of the support frame 2;

[0061] The trailer ball 1 is not changed in position angle and the like after installation as a carrier of the support frame 2, in order to realize the overall overturning of the support frame 2, the stand 3 and the like relative to the trailer ball 1, the first hinge plate 61 and the second hinge plate 62 are arranged to be rotationally connected, specifically, rotationally connected through the rotation shaft 63, when the support frame 2 is overturned downward, the second hinge plate 62 is rotated downward relative to the first hinge plate 61;

[0062] In order to realize the overturning of the second hinge plate 62, a limiting groove 621 is arranged on the second hinge plate 62, an open groove 611 is arranged on the first hinge plate 61, and the limiting shaft 66 is arranged in the limiting groove 621 and the open groove 611, when the limiting shaft 66 is clamped at the groove bottom of the limiting groove 621 and the open groove 611 (specifically see the description of the drawings), the first hinge plate 61 and the second hinge plate 62 are kept unmoved, when the limiting shaft 66 is separated from the open groove, the first hinge plate 61 and the second hinge plate 62 are only connected through the rotation shaft 63, and the second hinge plate 62 can be overturned outward and downward relative to the first hinge plate 61;

[0063] In order to realize the overturning of the second hinge plate 62 relative to the first hinge plate 61, the linkage plate 67 is arranged on the limiting shaft 66, one end of the linkage plate 67 is connected with the limiting shaft 66, and the other end is connected with the hand pull 64, when the connection end of the linkage plate 67 and the limiting shaft 66 is lifted upward under the action of external force, the limiting shaft 66 can be driven to move from the bottom end of the limiting groove 621 to the top end of the limiting groove 621, and separated from the open groove 611, so that the second hinge plate 62 loses one connection point with the first hinge plate 61, and the two are changed from fixed connection to rotary connection, so that the second hinge plate 62 can be overturned outward and downward relative to the rotation shaft 66;

[0064] In order to easily realize the action that the end of the linkage plate 67 and the limiting shaft 66 is lifted upward to drive the limiting shaft 66 to separate from the open groove 611, the hand pull 64 is arranged on the linkage plate 67, and the hinge shaft 65 is arranged on the second hinge plate 62; the hand pull 64 is arranged on the hinge shaft 65, when the hand pull 64 is pulled outward, the hand pull 64 drives the connection end of the linkage plate 67 and the hand pull 64 to rotate downward, the connection end of the linkage plate 67 and the limiting shaft 66 is lifted upward with the connection end of the hand pull 64 as a lever fulcrum, so that the limiting shaft 66 separates from the open groove 611;

[0065] In order to ensure that the support frame 2 is more easily reset, the compression spring 68 is arranged on the rotation shaft 63, one end of the compression spring 68 is arranged on the limiting shaft 66, and the other end is arranged on the rotation shaft 63.

[0066] In the specific embodiment of the utility model, seeFigures 1-7 To improve the stability of the connection and the stability of the flipping, one or more of the first hinge plates 61 can be provided;

[0067] Accordingly, the second hinge plate 62 is provided with one or more;

[0068] Multiple first hinge plates 61 and second hinge plates 62 are connected by the same rotating shaft 63, and each of them is provided with a hinge shaft 65, a limiting shaft 66, a linkage plate 67, and a handle 64.

[0069] The linkage plate 67 can have multiple connection points with the limit shaft 66 and the handle 64.

[0070] In a specific embodiment of this utility model, see Figures 1-7 To facilitate storage when not in use, the stand 3 is configured as a foldable mechanism, and the stand 3 is connected to the support frame 2 through a first folding mechanism 7;

[0071] The specific structure of the first folding mechanism 7 is as follows:

[0072] It includes a first connecting plate 71, a first connecting hole 72, a second connecting hole 73, a connecting screw 74, and a fastening nut 75;

[0073] Appendix Figure 5 A reinforcing pin can be installed at the position shown in Figure 76 for fixation;

[0074] The first connecting plate 71 is installed on the support frame 2. Since the support frame 2 is arranged horizontally and the upright 3 is installed vertically on the support frame 2, in order to ensure the stability of the connection and not to cause structural limitation to the tilting mechanism 6, the first connecting plate 71 is set on the connection end of the support frame 2, which is vertically set on the support frame 2 to realize the connection between the upright 3 and the support frame 2.

[0075] The first connecting hole 72 is provided on the first connecting plate 71; the second connecting hole 73 is provided at the connecting end of the upright 3; the connecting screw 74 passes through the first connecting hole 72 and the second connecting hole 73; the fastening nut 75 is connected to the threaded end of the connecting screw 74; when not in use, the fastening nut 75 can be loosened and the upright 3 can be flipped over. The structure is simple, the operation is convenient, and the space occupied is greatly reduced. It can be placed directly in the trunk of a car.

[0076] The height of the first connecting hole 72 and the second connecting hole 73 should be designed to facilitate the height of the stand 3 after folding.

[0077] In a specific embodiment of this utility model, see Figures 1-7 Angle irons are provided on both the first connecting plate 71 and the support frame 2 to improve the connection strength.

[0078] In the embodiment of the utility model, see Figures 1-7 , the stand 3 includes one or more connecting ends, and correspondingly, each connecting end is connected with the support frame 2 through a set of the first folding mechanism 7, thereby improving the stability of the connection.

[0079] In the embodiment of the utility model, see Figures 1-7 , the tire support frame 4 is installed on both sides of the support frame 2 through the second folding mechanism 8, thereby bearing and fixing the bicycle tires;

[0080] The second folding mechanism 8 includes a first connecting seat 81 and a first connecting shaft 82.

[0081] The first connecting seat 81 is installed on the support frame 2; the first connecting seat 81 is provided with a first connecting lug 83 and a second connecting lug 84, the first connecting lug 83 is provided with a first rotating hole 85, and the second connecting lug 84 is provided with a second rotating hole 86.

[0082] The first connecting shaft 82 is installed on the connecting end of the tire support frame 4; the two ends of the first connecting shaft 82 are respectively hinged with the first rotating hole 86 and the second rotating hole 86.

[0083] When idle, the tire support frame 4 can be folded by directly turning upward, which is very simple and practical.

[0084] In the embodiment of the utility model, see Figures 1-7 , in order to improve the bearing capacity of the tire support frame 4, a supporting shaft 87 and a clamping hook 88 are further arranged at the bottom of the tire support frame 4; the supporting shaft 87 does not work when folding; the tire support frame 4 plays a supporting role when loading the bicycle; the supporting shaft 87 is installed on the side surface of the support frame 2 and located below the tire support frame 4.

[0085] The bottom end of the clamping hook 88 is installed on the support frame 2, and the top end is buckled on the supporting shaft 87; the clamping hook 88 plays a supporting role on the supporting shaft 87.

[0086] The two ends of the supporting shaft 87 are provided with supporting grooves 871, and the bottom side of the tire support frame 4 is clamped in the supporting grooves 871, thereby ensuring the stability of the tire support frame 4 and preventing shaking forward and backward during driving.

[0087] In the embodiment of the utility model, see Figures 1-7 , the tire support frame 4 is provided with one or more groups, thereby meeting the loading of multiple bicycles;

[0088] Each group is provided with two sets, and the two sets of tire support frames are symmetrically installed on the sides of the support frame to fix two tires of a bicycle.

[0089] Each set of tire support frames is installed on the side of the support frame through a set of first folding mechanisms.

[0090] In the specific embodiments of the utility model, see Figures 1-7 , the tail lamp bracket 5 is installed on the two sides of the support frame 2 through a third folding mechanism 9.

[0091] Since the tire support frame 4 is flipped upward and folded on the upper surface of the support frame 2, the tail lamp bracket 5 is folded and closely attached to the side surface of the support frame 2.

[0092] The third folding mechanism 9 comprises a second connecting plate 91, a first folding hole 92, a second folding hole 93, a third folding hole 94, a folding pin 95, a first limiting hole 96, a second limiting hole 97, a first limiting pin 98, and a second limiting pin 99.

[0093] The second connecting plate 91 is installed on the side surface of the support frame 2; the first folding hole 92 and the third folding hole 94 are symmetrically arranged on the opposite side walls of the second connecting plate 91; the second folding hole 93 is arranged on the tail lamp bracket 5; and the folding pin 95 is simultaneously installed in the first folding hole 92, the second folding hole 93, and the third folding hole 94.

[0094] The first limiting hole 96 and the second limiting hole 97 are symmetrically arranged on the opposite side walls of the second connecting plate 91; and the second limiting hole 97 is arranged on the tail lamp bracket 5.

[0095] During driving when the bicycle is loaded, the tail lamp bracket is unfolded, the first limiting pin 98 cooperates with the first limiting hole 96, and the second limiting pin 99 cooperates with the second limiting hole 97.

[0096] When idle storage, the tail lamp bracket is folded, at this time, the first limiting pin 98 is pressed to be separated from the first limiting hole 96, and the second limiting pin 99 is pressed to be separated from the second limiting hole 97, and when used, it can be pulled out, which is simple to operate.

[0097] In the specific embodiments of the utility model, see Figures 1-7 , the two sides of the support frame 2 are provided with tail lamp brackets 5, which can meet the installation of tail lamps of different models.

[0098] In the specific embodiments of the utility model, see Figures 1-7 :

[0099] When the bicycle needs to be loaded:

[0100] Firstly, the trailer ball is installed on the car;

[0101] Then, the stand is unfolded, and the fastening nuts on both sides of the stand are twisted to make the connection between the stand and the support frame a stable connection;

[0102] Then, the tire support frame is unfolded directly, which is very simple and efficient, without any fastening operation;

[0103] Then, the tail lamp frame is opened, and the first and second limit pins are installed in the corresponding first and second limit holes;

[0104] Then, the bicycle is installed, which is installed on the tire support frame and the stand at the same time;

[0105] The headlamp and license plate are installed in advance;

[0106] After the bicycle is installed, when the trunk needs to be opened:

[0107] Firstly, pull the handle, under the cooperation of the linkage plate and the hinge shaft, the limit shaft is separated from the opening slot, so that the connection between the first and second hinge plates is lost, only the rotation shaft connection is reserved, so that the second hinge plate is flipped downward relative to the first hinge plate under the action of the rotation shaft, thereby driving the support frame, the stand, the bicycle and the like to flip outward and downward, so that the stand leaves the trunk of the car, at this time the trunk can be opened;

[0108] After the trunk is closed:

[0109] Lift the bicycle to flip upward, at this time the support frame flips upward, thereby driving the hinge shaft to flip upward, thereby driving the linkage plate to flip upward, the connection end of the linkage plate and the limit shaft flips downward, thereby driving the limit shaft to rotate along the limit slot, and finally clamped in the limit slot and the opening slot, realizing the reconnection of the first and second hinge plates, and maintaining a stable connection relationship;

[0110] When idle:

[0111] Firstly, the trailer ball is detached from the car;

[0112] Then, the fastening nuts on both sides of the stand are loosened to fold the stand;

[0113] Then, the tire support frame is flipped upward, so that the tire support frame is folded above the support frame;

[0114] Then, press the first and second limit pins, flip the tail lamp frame to the side of the support frame, and put it into the storage position.

[0115] The structure of the turnover dumping mechanism of the application is ingenious, simple, and stable in connection, guarantees the safety of driving, realizes the overall turnover of the stand, the supporting frame and the bicycle, and realizes the function of opening and closing the trunk without disassembling the bicycle;

[0116] The folding and unfolding of the tire supporting frame is simple, easy to operate, and has high practical value;

[0117] The tail lamp frame can also be folded, further saving space for overall storage;

[0118] Various functional requirements are effectively met.

[0119] The above only describes the preferred embodiments of the application and is not intended to limit the application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A foldable vehicle-mounted bicycle rack, mounted on a trailer hitch at the rear of a vehicle; Its features are: Includes a support frame and a stand for fixing the vehicle beam, wherein the support frame is connected to the trailer ball via a tilting mechanism; The upright frame and the support frame are connected by a first folding mechanism; The support frame is equipped with a tire support bracket and a taillight bracket. The tire support bracket is installed on both sides of the support frame via a second folding mechanism, and the taillight bracket is installed on both sides of the support frame via a third folding mechanism. A license plate mounting plate is provided on the outer side of the support frame.

2. The foldable bicycle rack as described in claim 1, characterized in that: The tipping mechanism includes a first hinge plate, a second hinge plate, a rotating shaft, a handle, a hinge shaft, a limiting shaft, a linkage plate, and a compression spring. The first hinge plate is installed at the connecting end of the trailer ball; The second hinge plate is installed at the connecting end of the support frame; The first hinge plate and the second hinge plate are rotatably connected via the rotation shaft; The hinge shaft is rotatably mounted on the second hinge plate; The pull handle is mounted on the hinge shaft; The first hinge plate is provided with an opening slot; The second hinge plate is provided with a limit groove; The limiting shaft is installed in both the limiting groove and the opening groove; One end of the linkage plate is connected to the limiting shaft, and the other end is connected to the hand handle; One end of the compression spring is mounted on the limiting shaft, and the other end is mounted on the rotating shaft.

3. A foldable bicycle rack as described in claim 2, characterized in that: The first hinge plate is provided with one or more; Accordingly, the second hinge plate is provided with one or more.

4. A foldable bicycle rack as described in claim 1, characterized in that: The first folding mechanism includes a first connecting plate, a first connecting hole, a second connecting hole, connecting screws, and fastening nuts; The first connecting plate is mounted on the support frame; The first connecting hole is disposed on the first connecting plate; The second connecting hole is provided at the connecting end of the upright; The connecting screw passes through the first connecting hole and the second connecting hole; The fastening nut is connected to the threaded end of the connecting screw.

5. A foldable bicycle rack as described in claim 4, characterized in that: The support frame includes one or more connecting ends, and each connecting end is connected to the support frame via a set of the first folding mechanism.

6. A foldable bicycle rack as described in claim 1, characterized in that: The second folding mechanism includes a first connecting seat and a first connecting shaft; The first connecting seat is mounted on the support frame; The first connector is provided with a first connector ear and a second connector ear, the first connector ear is provided with a first rotating hole, and the second connector ear is provided with a second rotating hole; The first connecting shaft is installed at the connecting end of the tire support frame; The two ends of the first connecting shaft are respectively hinged to the first rotating hole and the second rotating hole.

7. A foldable bicycle rack as described in claim 6, characterized in that: The second folding mechanism also includes a support shaft and a latch; The supporting shaft is installed on the side of the support frame; The bottom end of the hook is installed on the support frame, and the top end is snapped onto the support shaft; Both ends of the support shaft are provided with support grooves, and the bottom side of the tire support bracket is engaged in the support grooves.

8. A foldable bicycle rack as described in claim 6, characterized in that: The tire support frame is provided in one or more sets, with two sets in each set, and the two sets of tire support frames in each set are symmetrically installed on the side of the support frame. Each of the tire support brackets is mounted on the side of the support frame via a set of the first folding mechanisms.

9. A foldable bicycle rack as described in claim 1, characterized in that: The third folding mechanism includes a second connecting plate, a first folding hole, a second folding hole, a third folding hole, a folding pin, a first limiting hole, a second limiting hole, a first limiting pin, and a second limiting pin. The second connecting plate is installed on the side of the support frame; the first folding hole and the third folding hole are symmetrically arranged on two opposite side walls of the second connecting plate; the second folding hole is arranged on the taillight bracket; the folding pin is installed in the first folding hole, the second folding hole and the third folding hole simultaneously; The first limiting hole and the second limiting hole are symmetrically arranged on opposite side walls of the second connecting plate; the second limiting hole is arranged on the taillight bracket; the first limiting pin and the second limiting pin simultaneously engage with or disengage from the first limiting hole and the second limiting hole, respectively.

10. A foldable bicycle rack as described in claim 1, characterized in that: Taillight brackets are provided on both sides of the support frame.

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