Foldable automobile luggage rack structure

Abstract

The invention relates to a foldable automobile luggage rack structure, and relates to the technical field, when the foldable automobile luggage rack structure is unfolded, an auxiliary frame is located on the side of an automobile door, so that a user can stand on the ground to fix a bicycle on a base mechanism, and then in the folding process of a support mechanism, the auxiliary frame and the bicycle are moved to an automobile roof; in this way, a user can install the bicycle without climbing to the roof, the bicycle is safer and can be operated by one person, manpower is saved, meanwhile, the bicycle is in a lying state after being moved to the roof, the overall height can be reduced compared with vertical placement, and the automobile can pass through more height limiting areas; the automobile beam is located on the inner side face of the U-shaped air bag, the air bag is inflated to enable the inner side face of the air bag to bulge to clamp and fix the bicycle beam, and the air bag can provide uniform pressure during clamping, so that the beam can be prevented from being damaged, meanwhile, the clamping stability can be improved, the beam can be prevented from being scratched, and economic losses are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of luggage racks, in particular to a foldable automobile luggage rack structure. Background Art

[0002] The luggage rack on the roof of a car is a common vehicle facility for general travel cars or SUVs. Common luggage racks have simple functions and can generally only fix some soft items or cartons. However, many items that are often needed when traveling are difficult to carry. For example, with the improvement of living standards, mountain bicycles are often needed when traveling, and the above-mentioned luggage racks are difficult to fix or travel long distances. Of course, there are also car luggage racks that can specifically carry bicycles.

[0003] Patent publication number CN220594799U discloses a roof bicycle rack with adjustable support height. This prior art roof bicycle rack with adjustable support height has the advantages of being adaptable to bicycles of different sizes and being foldable and occupying less space.

[0004] However, the above prior art has the following technical defects: First, since the bicycle rack is installed on the roof, the user standing on the roof cannot touch the bicycle on the ground, and another person is required to lift the bicycle and pass it to the person on the roof. As a result, this existing technology requires at least two people to cooperate for installation, which is labor-intensive. In addition, the roof is at a high position, and the user is prone to fall and get injured when installing the bicycle on the rack on the roof without protection. At the same time, when the bicycle is placed upright on the roof, the overall height of the car is increased, making it impossible for cars to pass through some height-restricted areas.

[0005] Second, this prior art clamps and fixes the bicycle frame through the frame support part, but in order to ensure the clamping stability, teeth are provided on the inner side of the open clamp. These teeth can easily scratch the surface of the bicycle frame during the clamping process, reducing the appearance of the bicycle. In addition, the current bicycles are generally priced high, resulting in high subsequent maintenance costs and causing economic losses.

[0006] In summary, the prior art still has room for improvement in terms of safety in use, optimization of manpower and avoidance of scratches on the bicycle body. Therefore, those skilled in the art have proposed a device that improves safety in use, saves manpower and uses airbags to fix the bicycle body. Summary of the invention

[0007] In order to solve the above problems, the present application provides a foldable automobile luggage rack structure, which adopts the following technical solutions: It includes a bracket mechanism and a reinforcement mechanism. The bracket mechanism includes two symmetrically arranged side panels, a mouth-shaped main frame is installed between the two side panels, a slide plate is slidably arranged above the main frame, a mouth-shaped sub-frame is hinged on the edge of the slide plate, an L-shaped sliding groove with an arc at the corner is opened on the side of the side panel, and a slider sliding on the same side is installed on the side of the sub-frame.

[0008] The reinforcement mechanism includes a cylinder installed on the side of one of the side plates, a piston is slidably arranged in the cylinder, an extension rod extending to the outside of the cylinder is installed at the center of the side of the piston, and a stop block sliding in the L-shaped slide groove on the same side is installed at the end of the extension rod, and a first spring is arranged on one side of the piston in the cylinder.

[0009] It also includes a base mechanism, which cooperates with the reinforcement mechanism to fix the bicycle.

[0010] Preferably, a movable screw is rotatably mounted below the side plate, and a threaded seat connected to the main frame is provided on the movable screw.

[0011] Preferably, the base mechanism comprises an L-shaped seat installed on the side of the sub-frame and close to the edge, a fixed base is installed on the upper side of the L-shaped seat, and two tire grooves are symmetrically provided on the upper surface of the fixed base.

[0012] Preferably, a threaded hole communicating with each tire groove is formed on a side of the fixing base, and a fixing screw matched with the tire groove is arranged in the threaded hole.

[0013] Preferably, the end of the fixing screw in the tire groove is rotatably mounted with an extrusion disk, and the other end is mounted with a knob, and two limit rods extending to the outside of the fixed base are symmetrically mounted on the side of the extrusion disk.

[0014] Preferably, an air inlet pipe is installed on the side of the cylinder, and a first one-way valve is installed on the air inlet pipe near the cylinder.

[0015] Preferably, a C-shaped seat is provided above the fixed base, and an air bag adapted thereto is installed on the inner side surface of the C-shaped seat.

[0016] Preferably, a connecting pipe communicating with the airbag is installed at the end of the cylinder, and a second one-way valve is arranged on the connecting pipe near the C-shaped seat.

[0017] Preferably, an air outlet pipe is installed on the side of the airbag, and a valve is installed on the air outlet pipe.

[0018] In summary, the present application includes at least one of the following beneficial technical effects: First, the present invention provides a foldable bracket mechanism. When unfolded, the sub-frame is located at the door side, so that the user can fix the bicycle on the base mechanism while standing on the ground. Then, during the folding process of the bracket mechanism, the sub-frame and the bicycle are moved to the roof, so that the user does not need to climb to the roof to install the bicycle, which is safer and can be operated by one person, saving manpower. At the same time, after the bicycle is moved to the roof, it is in a lying state, which can reduce the overall height compared to standing, allowing the car to pass through more height-restricted areas.

[0019] 2. The present invention is also provided with a reinforcement mechanism, so that the automobile beam is located on the inner side of the U-shaped airbag, and the inner side of the airbag is bulged by injecting air into the airbag to clamp and fix the bicycle beam. The airbag can provide uniform pressure during clamping, which can avoid damage to the beam and improve the stability of clamping. It can also better adapt to the irregular surface of the beam, avoid scratching the beam, and reduce economic losses. At the same time, the support mechanism is used to fold and inflate the airbag in cooperation with the reinforcement mechanism. The user only needs to place the bicycle beam in the inner groove of the airbag. The operation is simple and convenient for the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the folded state structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the support mechanism structure of the present invention.

[0024] Figure 4 It is a side view of the bracket mechanism of the present invention.

[0025] Figure 5 It is a schematic diagram of the base mechanism structure of the present invention.

[0026] Figure 6 yes Figure 5 Enlarged view of part A.

[0027] Figure 7 It is a side view of the present invention.

[0028] Figure 8 It is a structural schematic diagram of the reinforcement mechanism of the present invention.

[0029] Fig. 9 yes Figure 7 Enlarged view of part B.

[0030] Fig.10 It is a partial cross-sectional view of the reinforcement mechanism of the present invention.

[0031] Fig.11 It is a schematic diagram of the structure of the regulating mechanism of the present invention.

[0032] Fig.12 It is a side view of the adjustment mechanism of the present invention.

[0033] In the figure: 1. bracket mechanism; 101. side plate; 102. main frame; 103. slide plate; 104. sub-frame; 105. L-shaped slide groove; 106. slide block; 107. moving screw; 108. threaded seat; 109. turntable; 110. support; 111. slide bar; 112. slide seat; 2. base mechanism; 201. L-shaped seat; 202. fixed base; 203. tire groove; 204. fixed screw; 205. squeeze plate; 206. knob; 207. limit rod; 3. reinforcement mechanism; 301. cylinder; 302. piston; 303. extension rod ; 304, stop block; 305, first spring; 306, air inlet pipe; 307, first one-way valve; 308, connecting pipe; 309, second one-way valve; 310, U-shaped seat; 311, air bag; 312, air outlet pipe; 313, valve; 4, adjusting mechanism; 401, rectangular frame; 402, vertical rod; 403, adjusting block; 404, U-shaped plate; 405, gear; 406, first fixed rack; 407, adjusting rack; 408, second fixed rack; 409, rectangular plate; 410, round rod; 411, second spring; 412, U-shaped pull plate. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1 - Fig.12 Embodiments of the present invention are described in detail.

[0035] The embodiment of the present application discloses a foldable automobile luggage rack structure, which is provided with a foldable bracket mechanism. When unfolded, the sub-frame is on the door side, so that the user can fix the bicycle on the base mechanism while standing on the ground. Then, during the folding process of the bracket mechanism, the sub-frame and the bicycle are moved to the roof, so that the user can install the bicycle without climbing to the roof, which is safer and can be operated by one person, saving manpower. At the same time, after the bicycle is moved to the roof, it is in a lying state, which can reduce the overall height compared to standing, allowing the car to pass through more height-restricted areas. Embodiment 1:

[0036] like Figure 1-Figure 3 As shown, it includes a bracket mechanism 1 and a reinforcement mechanism 3. The bracket mechanism 1 includes two symmetrically arranged side panels 101. Two round rods 410 are symmetrically installed on the sides of the side panels 101. Each round rod 410 is provided with a through hole. The through hole on each round rod 410 can be used to fix it on the roof with bolts, thereby fixing the device on the car.

[0037] like Figure 3 and Figure 4 As shown, a mouth-shaped main frame 102 is installed between the two side panels 101, a slide plate 103 is slidably arranged above the main frame 102, two groups of slide bars 111 are symmetrically installed between the inner side surfaces of the main frame 102, and a slide seat 112 fixedly connected to the slide plate 103 is slidably arranged on each group of two slide bars 111. When the slide plate 103 slides, it will also drive the slide seat 112 to slide on the corresponding slide bar 111.

[0038] like Figure 3 and Figure 4 As shown, the edge of the slide plate 103 is hinged with a mouth-shaped sub-frame 104, the side of the side plate 101 is provided with an L-shaped slide groove 105 with an arc at the corner, and the side of the sub-frame 104 is installed with a slider 106 sliding in the same side. The moving slide plate 103 will also drive the sub-frame 104 to move, so that the slider 106 slides in the L-shaped slide groove 105. When the slider 106 passes through the arc corner of the L-shaped slide groove 105, it will pass through its diversion, so that the sub-frame 104 rotates around the connection with the slide plate 103 until the slide plate 103 and the sub-frame 104 are 90 degrees. like Figure 3 and Figure 4 As shown, a movable screw 107 is rotatably installed at the bottom of the side panel 101, and a threaded seat 108 connected to the main frame 102 is provided on the movable screw 107. A turntable 109 is installed at one end of the threaded seat 108. The user can rotate the movable screw 107 through the turntable 109. The rotating movable screw 107 drives the threaded seat 108 to move, and the moving threaded seat 108 drives the skateboard 103 to move.

[0039] In summary, when unfolding, the user rotates the screw 107 through the turntable 109 to drive the threaded seat 108 to move, thereby driving the slide plate 103 and the sub-frame 104 to move in the same side direction of the sub-frame 104, and also driving the two sliders 106 on the sub-frame 104 to slide in their respective L-shaped slots 105 until the sliders 106 slide to the arc corner of the L-shaped slot 105. The guide of the arc corner of the L-shaped slot 105 allows the sub-frame 104 to rotate around the connection with the slide plate 103 during the movement, allowing the sub-frame 104 to deflect downward until the sub-frame 104 and the slide plate 103 are at ninety degrees, and the unfolding is completed.

[0040] When folding, the turntable 109 is reversed to allow the slide plate 103 and the sub-frame 104 to move in the opposite direction, and the sub-frame 104 is reversed to be parallel to the slide plate 103 through the guide of the arc corner of the slider 106, and then the threaded seat 108 moves to the end of the moving screw 107 close to the turntable 109, so that the position of the slide plate 103 and the sub-frame 104 can be restored.

[0041] like Figure 1 and Figure 5As shown, the base mechanism 2 includes an L-shaped seat 201 installed on the side of the sub-frame 104 and close to the edge, a fixed base 202 is installed on the upper side of the L-shaped seat 201, and two tire grooves 203 are symmetrically provided on the upper surface of the fixed base 202. When installing the bicycle, the two tires of the bicycle can be placed in the two tire grooves 203.

[0042] like Figure 5 and Figure 6 As shown, a threaded hole connected to each tire groove 203 is opened on the side of the fixed base 202, and a fixed screw 204 matched with it is arranged in the threaded hole. The end of the fixed screw 204 in the tire groove 203 is rotatably installed with an extrusion plate 205, and the other end is installed with a knob 206. Rotating the knob 206 drives the fixed screw 204 to rotate and drive it to move, and the moving fixed screw 204 drives the extrusion plate 205 to move.

[0043] like Figure 5 and Figure 6 As shown, two limiting rods 207 extending to the outside of the fixed base 202 are symmetrically installed on the side of the extrusion disk 205. When the fixed screw 204 rotates, the limiting rods 207 are used to limit the extrusion disk 205 to prevent it from rotating with the fixed screw 204.

[0044] In summary, when installing a bicycle, place the two tires of the bicycle into the two tire grooves 203, rotate a knob 206 to drive the fixed screw 204 to rotate and drive it to move, and the moving fixed screw 204 drives the extrusion plate 205 to move toward the tire direction until it cooperates with the inner wall of the tire groove 203 to clamp the tire, and then repeat the operation to fix the other tire, and fix the bicycle on the base mechanism 2.

[0045] like Figure 7-Figure 9 As shown, the reinforcement mechanism 3 includes a cylinder 301 installed on the side of one of the side plates 101, and an extension rod 303 extending to the outside of the cylinder 301 is arranged inside the cylinder 301. The end of the extension rod 303 is installed with a stopper 304 sliding in the L-shaped groove 105 on the same side. When the moving slider 106 contacts the stopper 304, it will also push the stopper 304 to move in the L-shaped groove 105, and the moving stopper 304 drives the extension rod 303 to move.

[0046] like Figure 1 and Figure 8 As shown, a U-shaped seat 310 is arranged above the fixed base 202, and an air bag 311 matching with the U-shaped seat 310 is installed on the inner side of the U-shaped seat 310. The bicycle beam is placed inside the air bag 311, and then the air bag 311 expands and the inner side bulges to clamp the bicycle beam, thereby reinforcing the bicycle.

[0047] like Figure 8 and Fig.10As shown, a piston 302 is slidably arranged in the cylinder 301, a first spring 305 is arranged on one side of the piston 302 in the cylinder 301, a connecting pipe 308 connected to the airbag 311 is installed at the end of the cylinder 301, and a second one-way valve 309 is arranged on the connecting pipe 308 near the U-shaped seat 310. The moving extension rod 303 drives the piston 302 to move while compressing the first spring 305, pushing the gas in the cylinder 301 into the airbag 311 through the connecting pipe 308 to make it bulge, and at the same time, the second one-way valve 309 prevents the gas in the airbag 311 from entering the cylinder 301 through the connecting pipe 308.

[0048] like Fig.10 As shown, an air inlet pipe 306 is installed on the side of the cylinder 301, and a first one-way valve 307 is installed on the air inlet pipe 306 near the cylinder 301. When the piston 302 moves in the opposite direction, the outside air enters the cylinder 301 through the air inlet pipe 306, while preventing the cavity of the cylinder 301 from being discharged from the air inlet pipe 306.

[0049] like Figure 8 As shown, an air outlet pipe 312 is installed on the side of the air bag 311, and a valve 313 is installed on the air outlet pipe 312. The valve 313 is opened to allow the gas in the air bag 311 to be discharged from the air outlet pipe 312, and the air bag 311 is contracted to release the clamping of the bicycle crossbeam.

[0050] In summary, the bicycle beam is placed inside the airbag 311, and then during the folding operation of the bracket mechanism 1, the moving slider 106 contacts the stop block 304 and pushes the stop block 304 to move in the L-shaped slide groove 105. The moving stop block 304 drives the piston 302 to move through the extension rod 303, and while compressing the first spring 305, the gas in the cylinder 301 is pushed into the airbag 311 through the connecting pipe 308 to make it bulge. The inflated inner side of the airbag 311 clamps the bicycle beam and reinforces the bicycle. When the bracket mechanism 1 is unfolded, the slider 106 moving in the opposite direction releases the limit on the stop block 304, the first spring 305 rebounds and drives the piston 302 to restore its position, and the outside air enters the cylinder 301 through the air inlet pipe 306. Then, the valve 313 is opened to allow the gas in the airbag 311 to be discharged from the air outlet pipe 312, and the airbag 311 is contracted to release the clamping of the bicycle beam. Embodiment 2:

[0051] Based on the first embodiment, Figure 1 and Fig.11 As shown, an adjustment mechanism 4 is also provided, which includes a rectangular frame 401 installed on the upper side of the L-shaped seat 201 and on one side of the fixed base 202, and a C-shaped plate 404 is slidably provided on the side of the rectangular frame 401. The C-shaped plate 404 and the rectangular frame 401 are used to install other components in the mechanism.

[0052] like Fig.11 and Fig.12 As shown, a gear 405 is rotatably installed between the inner side surfaces of the C-shaped plate 404, one end of the gear 405 is fixedly connected to the C-shaped seat 310, and a first fixed rack 406 meshing with the gear 405 is provided on one side of the gear 405. The C-shaped plate 404 that moves up and down drives the C-shaped seat 310 to move through the gear 405 to adjust its height, and at the same time, the first fixed rack 406 is moved to release the limit with the gear 405, so that the C-shaped seat 310 can be rotated.

[0053] like Fig.11 and Fig.12 As shown, a group of vertical rods 402 are installed between the inner sides of the rectangular frame 401, and an adjustment block 403 fixedly connected to a C-shaped plate 404 is slidably arranged on the two vertical rods 402. The movable C-shaped plate 404 drives the adjustment block 403 to slide on the vertical rods 402, thereby improving its stability during sliding.

[0054] like Fig.11 and Fig.12 As shown, an adjusting rack 407 is installed on the side of the rectangular frame 401, and a second fixed rack 408 meshing with the adjusting rack 407 is arranged on the tooth side of the adjusting rack 407, and a rectangular plate 409 is installed on the other side of the adjusting block 403, and a group of round rods 410 penetrating the rectangular plate 409 are installed on the side of the second fixed rack 408. When the second fixed rack 408 is pulled by the round rods 410 to release the meshing with the adjusting rack 407, the fixation between the rectangular plate 404 and the rectangular frame 401 can be released.

[0055] like Fig.11 and Fig.12 As shown, a group of second springs 411 are arranged between the second fixed rack 408 and the rectangular plate 409, and a C-shaped pull plate 412 is arranged on one side of the C-shaped plate 404. One end of the C-shaped pull plate 412 is fixedly connected to the first fixed rack 406, and the other end is fixedly connected to the ends of the two rectangular plates 409. The user can drive the first fixed rack 406 and the second fixed rack 408 to move by pulling the C-shaped pull plate 412, thereby releasing the engagement with the gear 405 and the adjustment rack 407 respectively. The moving second fixed rack 408 will also compress the second spring 411. When the user lets go, the second spring 411 rebounds and drives the first fixed rack 406 and the second fixed rack 408 to restore their positions.

[0056] In summary, the outwardly pulled C-shaped pull plate 412 drives the first fixed rack 406 and the second fixed rack 408 to move, respectively releasing the engagement with the gear 405 and the adjusting rack 407, thereby releasing the fixation of the C-shaped seat 310 and the C-shaped plate 404, and at the same time compressing the second spring 411, moving the C-shaped plate 404 up and down to adjust the height of the C-shaped seat 310 so that it is at the same height as the bicycle crossbeam, or the C-shaped seat 310 can be rotated to adapt to the inclined crossbeam until the crossbeam is on the inner side of the airbag 311, and then releasing the C-shaped pull plate 412 to allow the second spring 411 to rebound and drive the first fixed rack 406 and the second fixed rack 408 to restore their positions, and the first fixed rack 406 re-engages with the gear 405 to fix the C-shaped seat 310, and the adjusting rack 407 re-engages with the second fixed rack 408 to fix the C-shaped plate 404.

[0057] Working principle of the present invention: S1. Structural installation: fixing the device on the roof. Specifically, each round rod 410 is fixed on the roof through the through holes provided on the round rod 410 with bolts, thereby fixing the device on the car.

[0058] S2, structural deployment, the bracket mechanism 1 is deployed so that the sub-frame 104 is on the side of the car. Specifically, the user rotates the rotating screw 107 through the turntable 109 to drive the threaded seat 108 to move, driving the slide plate 103 and the sub-frame 104 to move in the same side direction of the sub-frame 104, and also driving the two sliders 106 on the sub-frame 104 to slide in their respective L-shaped slide grooves 105 until the sliders 106 slide to the arc corner of the L-shaped slide groove 105. The flow guide of the arc corner of the L-shaped slide groove 105 allows the sub-frame 104 to rotate around the connection with the slide plate 103 during the movement, so that the sub-frame 104 deflects downward. At this time, the sub-frame 104 is on the side of the car and is 90 degrees with the slide plate 103, and the deployment is completed.

[0059] S3. Place the bicycle on the base mechanism 2 to fix it. Specifically, the user stands on the ground, lifts the bicycle, and then puts the two tires into the two tire grooves 203. At the same time, the bicycle crossbeam is between the inner sides of the airbag 311. A knob 206 is rotated to drive the fixing screw 204 to rotate and move. The moving fixing screw 204 drives the extrusion plate 205 to move toward the tire until it is clamped with the inner wall of the tire groove 203. Then, the operation is repeated to fix the other tire and the bicycle is fixed to the base mechanism 2.

[0060] S4, structural folding, folding the support mechanism 1 to move the bicycle to the roof. Specifically, the turntable 109 is reversed to allow the slide plate 103 and the sub-frame 104 to move in the opposite direction. The sub-frame 104 is reversed to be parallel to the slide plate 103 through the guide of the arc corner of the slider 106. Then, until the threaded seat 108 moves to the end of the moving screw 107 close to the turntable 109, the slide plate 103 and the sub-frame 104 are restored to their positions. At the same time, the restored sub-frame 104 will also move the bicycle fixed on the base mechanism 2 to the roof.

[0061] S5. Bicycle reinforcement. During the folding process of the support mechanism 1, the reinforcement mechanism 3 cooperates to reinforce the bicycle. Specifically, after the moving slider 106 contacts the stop block 304, it will also push the stop block 304 to move in the L-shaped slide groove 105. The moving stop block 304 drives the piston 302 to move through the extension rod 303, and while compressing the first spring 305, the gas in the cylinder 301 is pushed into the airbag 311 through the connecting pipe 308 to make it bulge. The expanded inner side of the airbag 311 clamps the bicycle beam to reinforce the bicycle.

[0062] S6, unloading the bicycle, unfolding the support mechanism 1 to drive the bicycle to the side of the car, and then removing it. Specifically, through the S2 operation, the sub-frame 104 is moved to the side of the car, and the slider 106 moving in the opposite direction releases the limit on the abutment block 304. The first spring 305 rebounds and drives the piston 302 to restore its position. The outside air enters the cylinder 301 through the air inlet pipe 306, and then the valve 313 is opened to allow the gas in the airbag 311 to be discharged from the air outlet pipe 312, and the airbag 311 is contracted to release the clamping of the bicycle beam. Then, the knob 206 is rotated in the opposite direction to drive the extrusion plate 205 to move in the opposite direction to release the clamping of the bicycle tire, and then the bicycle can be removed.

[0063] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0064] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A foldable automobile luggage rack structure, characterized in that: The invention comprises a support mechanism (1) and a reinforcement mechanism (3), wherein the support mechanism (1) comprises two symmetrically arranged side panels (101), a mouth-shaped main frame (102) is installed between the two side panels (101), a slide plate (103) is slidably arranged above the main frame (102), a mouth-shaped secondary frame (104) is hingedly connected to the edge of the slide plate (103), a side surface of the side panel (101) is provided with an L-shaped sliding groove (105) with an arc at the corner, and a sliding block (106) is installed on the side surface of the secondary frame (104) so ​​as to slide in the same side; The reinforcement mechanism (3) comprises a cylinder (301) mounted on the side of one of the side plates (101), a piston (302) being slidably disposed in the cylinder (301), an extension rod (303) extending to the outside of the cylinder (301) being mounted at the center of the side of the piston (302), a stopper (304) sliding in an L-shaped slide groove (105) on the same side being mounted at the end of the extension rod (303), and a first spring (305) being disposed on one side of the piston (302) in the cylinder (301); It also comprises a base mechanism (2), wherein the base mechanism (2) cooperates with the reinforcement mechanism (3) to fix the bicycle.

2. The foldable automobile luggage rack structure according to claim 1, characterized in that: A movable screw rod (107) is rotatably mounted below the side plate (101), and a threaded seat (108) connected to the main frame (102) is provided on the movable screw rod (107).

3. The foldable automobile luggage rack structure according to claim 1, characterized in that: The base mechanism (2) comprises an L-shaped seat (201) mounted on the side of the sub-frame (104) and close to the edge, a fixed base (202) is mounted on the upper side of the L-shaped seat (201), and two tire grooves (203) are symmetrically provided on the upper surface of the fixed base (202).

4. The foldable automobile luggage rack structure according to claim 3, characterized in that: A threaded hole communicating with each tire groove (203) is provided on the side of the fixing base (202), and a fixing screw (204) matching with the tire groove (203) is arranged in the threaded hole.

5. The foldable automobile luggage rack structure according to claim 4, characterized in that: The end of the fixing screw (204) in the tire groove (203) is rotatably mounted with an extrusion disc (205), and the other end is mounted with a knob (206). Two limit rods (207) extending to the outside of the fixing base (202) are symmetrically mounted on the side of the extrusion disc (205).

6. The foldable automobile luggage rack structure according to claim 5, characterized in that: An air intake pipe (306) is installed on the side of the cylinder (301), and a first one-way valve (307) is installed on the air intake pipe (306) near the cylinder (301).

7. The foldable automobile luggage rack structure according to claim 6, characterized in that: A C-shaped seat (310) is arranged above the fixed base (202), and an air bag (311) adapted thereto is installed on the inner side surface of the C-shaped seat (310).

8. The foldable automobile luggage rack structure according to claim 7, characterized in that: A connecting pipe (308) communicating with the air bag (311) is installed at the end of the cylinder (301), and a second one-way valve (309) is provided on the connecting pipe (308) near the C-shaped seat (310).

9. The foldable automobile luggage rack structure according to claim 8, characterized in that: An air outlet pipe (312) is installed on the side of the air bag (311), and a valve (313) is installed on the air outlet pipe (312).

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