Stable bicycle carrier at rear end of vehicle

Disclosed is a stable bicycle carrier at rear end of a vehicle including a rear rod, wherein one end of the rear rod from the vehicle is provided with a mounting piece, the mounting piece is provided with a beam, and both ends of the beam in its length direction are provided with wheel seats for accommodating wheels; the mounting piece includes a positioning rod and mounting rods at both ends of the positioning rod, the positioning rod is located at the middle of the beam, a side wall of the positioning rod away from the beam is connected with the rear rod; two of the mounting rods are located at a side wall of the positioning rod away from the rear rod, and a fixing component is provided between each of the mounting rods and the beam.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority and benefit of Chinese patent application serial no. 202220247563.0, filed on Jan. 31, 2022, and Chinese patent application serial no. 202222850275.7, filed on Oct. 26, 2022. The entireties of Chinese patent application serial no. 202220247563.0 and Chinese patent application serial no. 202222850275.7 are hereby incorporated by reference herein and made a part of this specification.

TECHNICAL FIELD

This application relates to a technical field of bicycle rack, and in particular, to a stable bicycle carrier at rear end of a vehicle.

BACKGROUND

At present, bicycles are widely used in people's daily life. People use bicycles for short distance travel and vehicles for long distance travel. Usually, people use a bicycle carrier at rear end of a vehicle, so as to carry bicycles when driving.

The prior art discloses a bicycle carrier at rear end of a vehicle with adjustable load capacity, including an underframe and several brackets on the underframe. The underframe includes a rear connector at the rear of the vehicle, a rear rod at one end of the rear connector and a connecting rod between the rear connector and the rear rod. The bracket includes a slidable sleeve which is slidably arranged on the connecting rod, wheel limiting pieces which are arranged on two sides of the slidable sleeve opposite to each other, a telescopic rod on one end of the slidable sleeve away from the rear connector and a crossbar limiting piece on the telescopic rod. The rear connector can be fixed at the rear of the vehicle by bolts, wherein two wheels of the bicycle can be placed inside two groups of wheel limiting pieces. The position of the crossbar limiting piece can be adjusted by the telescopic rod, and the crossbar of the bicycle can be fixed by the crossbar limiting piece, so that the bicycle can be quickly fixed at the rear of the vehicle.

In view of the above related technologies, the inventor found that there are at least the following problems in the technology: the bracket and the bicycle is mounted and fixed by a bicycle carrier through a connecting rod, wherein the bicycle carrier has a poor structural stability on the whole. When the vehicle bumps during driving, the bicycle and the bracket on the connecting rod tend to skew, so it needs to be improved.

SUMMARY

A stable bicycle carrier at rear end of a vehicle is disclosed, to improve the structural stability of the bicycle carrier and in turn to improve the connection stability between the bicycle and the rack.

In one aspect of the present disclosure, a stable bicycle carrier at rear end of a vehicle is disclosed, including a rear rod. One end of the rear rod away from the vehicle is provided with a mounting piece with a beam, and both ends of the beam in its length direction are provided with wheel seats for accommodating wheels. The mounting piece comprises a positioning rod and mounting rods at both ends of the positioning rod, the positioning rod is located at the middle of the beam, a side wall of the positioning rod away from the beam is connected with the rear rod. Two of the mounting rods are located at a side wall of the positioning rod away from the rear rod, and a fixing component is provided between each of the mounting rods and the beam.

When in use, the wheel can be pressed into the wheel seat, wherein the mounting rod improves support stability of the bicycle on the carrier and increases contact area with the beam. At the same time, two groups of mounting rods are connected with the beam through fixing components, respectively, which improves the connection stability between the mounting rods and the beam and the structural strength of the carrier on the whole, thus improving the support stability of the bicycle on the rack.

Preferably, the fixing component includes a fixing plate, which is arranged on a side wall of the beam away from each of the mounting rods; connecting plates, which are arranged at both ends of the fixing plate, wherein side walls of two of the connecting plates facing each other abut against an outer wall of the beam; butt plates, each of which is arranged at a side wall of a respective one of the connecting plates close to the mounting rods; and fasteners, each of which extends between a respective one of the butt plates and a respective one of the mounting rods, to fix the respective one of the butt plates on the respective one of the mounting rods.

Therefore, the connection stability between the mounting rods and the beam is improved, and the structural strength of the bracket on the whole is increased.

Preferably, one end of the rear rod close to the mounting rods is provided with two groups of adjusting plates. An adjusting rod is rotatably arranged between two of the adjusting plates. One end of the adjusting rod away from the adjusting plates is connected with the positioning rod. The adjusting rod is provided with a limiting component for limiting a relative position of the adjusting rod and the adjusting plates.

When in use, the adjusting rod is rotated around the adjusting plates, wherein a quickly positioning of the carrier is realized by the limiting component, so as to adjust the relative position of the carrier and the bicycle body, thereby realizing the retraction and expansion of the carrier and improving the practicability of the rack.

Preferably, the limiting component includes a slide rod, which is slidably arranged in the adjusting rod, one end of the slide rod away from the adjusting plates extends through the positioning rod, and the slide rod is slidable in a length direction of the adjusting rod; a limiting rod, which is arranged at one end of the slide rod close to the adjusting plates, wherein each of peripheral walls of two of the adjusting plates is provided with a plurality of limit notches configured to be pressed in by the limiting rod, and an outer wall of the adjusting rod is provided with a slide groove throughout the outer wall, in which the limiting rod slides in the length direction of the adjusting rod; and an elastic piece, which fits over the slide rod, wherein one end of the elastic piece abuts against the positioning rod, and the other end of the elastic piece abuts against the limiting rod, and the elastic piece can press the limiting rod into the limit notches by elastic force of the elastic piece itself.

When in use, the slide rod is pulled to drive the limiting rod out of the limit notches, and then the position of the adjusting rod can be adjusted. After the position adjustment has been completed, the slide rod can be released, such that pressure on the elastic piece will be reduced and the elastic piece elastically expanded, to push the limiting rod into the limit notches, so as to ensure that the limiting rod is snapped in the adjusting plates, and to ensure use stability of the limiting component.

In a second aspect, another kind of stable bicycle carrier at rear end of a vehicle is disclosed, including a rear rod, one end of the rear rod away from the vehicle is provided with a mounting piece with wheel seats for accommodating wheels, wherein one end of the rear rod close to the mounting piece is provided with two groups of adjusting plates, an adjusting rod is rotatably provided between two of the adjusting plates, with the adjusting rod being connected with the mounting piece. A driving component is provided between the adjusting rod and the adjusting plates, with the driving component being configured to adjust a relative position of the adjusting rod and the rear rod. A rotation gap is remained between the adjusting rod and the rear rod, wherein the rotation gap is provided for the adjusting rod, such that the adjusting rod can drive the mounting piece to rotate to the ground.

The driving component adjusts the relative position of the adjusting rod and the rear rod, which makes the adjusting rod rotate towards the ground. The adjusting rod drives the mounting piece and the bicycle to move towards the ground, so that the bicycle can keep a safe distance from the trunk, thus ensuring the normal opening and closing of the trunk and use convenience of the bicycle rack. Tilt of the adjusting rod and mounting piece can reduce the distance between the mounting piece and the ground, so as to facilitate access to the bicycle.

DESCRIPTION OF THE EMBODIMENTS

The present disclosure will be further described in detail below in combination withFIG.1toFIG.13.

A stable bicycle carrier at rear end of a vehicle is disclosed.

Referring toFIG.1andFIG.2, a stable bicycle carrier at rear end of a vehicle comprises a rear rod1which is fixed by thread. Two adjusting plates11are welded on one end of the rear rod1away from the vehicle, between which an adjusting rod12is rotatably connected by a bearing pin. A bolt is threadedly connected between one end of the adjusting rod12close to the rear rod1and the two adjusting plates11, to fixedly connect the adjusting rod12and the two adjusting plates11.

A mounting piece2is fixedly connected to one end of the adjusting rod12away from the rear rod1. The mounting piece2includes a positioning rod21and mounting rods22. The positioning rod21extends through the end of the adjusting rod12away from the rear rod1, and the adjusting rod12is welded and fixed at the middle of the positioning rod21. The mounting rods22are welded and fixed at both ends of the positioning rod21in its length direction; are located on the side wall of the positioning rod21away from the adjusting rod12; are perpendicular to the positioning rod21, respectively; and are integrally connected with the two ends of the positioning rod21through an arc-shaped rod. The mounting piece2has a U-form. The positioning rod21and the mounting rods22are all hollow pipes with square cross section.

The upper surfaces of the two mounting rods22is jointly connected with a plurality of beams3, and each beam3can be placed with bicycles. In this embodiment, the beams3are divided into two groups. The beams3are arranged with the adjusting rod12as the axis of symmetry and are perpendicular to the mounting rod22. Each end of the beam3in its length direction is fixedly connected by bolts with a wheel seat31for placing a wheel. In this embodiment, wheel seats31of different models can be installed and replaced by screwing the bolts.

Referring toFIG.1andFIG.3, a fixing component4is connected between each of the mounting rods22and a respective one of the beams3, which includes a fixing plate41, connecting plates42, butt plates43and fasteners44. In this embodiment, the fastener44is a bolt. The fixing plate41is located on the side wall of the beam3away from the mounting rod22. The connecting plates42are integrally formed at both ends of t the fixing plate41in its length direction. Two connecting plates42are both located on the side walls of the fixing plate41close to the beam3, and the side walls of the two connecting plates42facing each other abut against the outer wall of the beam3.

The butt plate43is integrally formed at the end of the connecting plate42close to the mounting rod22. The bolt in the fastener44penetrates the butt plate43and the mounting rod22simultaneously, and are threadedly connected with it through a nut, which abuts against the lower surface of the beam3to fix the butt plate43on the mounting rod22, thus realizing a fixed connection between the beam3and the mounting rod22.

Referring toFIG.1andFIG.4, two groups of access holes110for inserting bolts extend through two adjusting plates11, one group of the access holes110is located at the end of the adjusting plate11away from the positioning rod21, and the other group of the access holes110is located at the end of the adjusting plate11close to the rear rod1. The adjusting rod12has a hollow structure. The adjusting rod12is internally connected with a limiting component5, which is configured to adjust the relative position of the adjusting rod12and the adjusting plates11.

The limiting component5includes a slide rod51, a limiting rod52and an elastic piece53. In this embodiment, the elastic piece53is a spring. The slide rod51is inserted inside the adjusting rod12and extends through the positioning rod21at the end away from the adjusting plates11, so that the slide rod51can slide in the length direction of the adjusting rod12when pulling the slide rod51.

The limiting rod52is threadedly connected to the end of the slide rod51close to the adjusting plates11. A peripheral wall of each of the two adjusting plates11is provided with two groups of limit notches111configured to be pressed in by the limiting rod52. One group of the limit notches111and one group of the access holes110are arranged on both ends of the adjusting plate11opposite to each other, while the other group of the limit notches111and the other group of access holes110are on both ends of the adjusting plate11opposite to each other.

When the adjusting rod12and the adjusting plates11rotate relative to each other, the limiting rod52is pressed into the limit notches111to limit the relative position of the adjusting rod12and the adjusting plates11, and then bolts can be inserted into the corresponding access holes110to fixedly connect the adjusting plates11and the adjusting rod12.

A slide groove121extends through the outer wall of the adjusting rod12to be passed through by the end of the limiting rod52, so that the slide rod51can slide in the length direction of the adjusting rod12in the slide groove121. The elastic piece53fits over the slide rod51, wherein one end of the elastic piece53abuts against the side wall of the positioning rod21close to the limiting rod52, and the other end thereof abuts against the side wall of the limiting rod52close to the positioning rod21. The elastic piece53pushes the limiting rod52into the limit notches111by its own elastic force.

Referring toFIG.1andFIG.3, a reinforcing rod221is welded an fixed between the two mounting rods22, which is located at the end of the mounting rod22away from the positioning rod21. A guide hole222extends through the side wall of the reinforcing rod221close to the slide rod51, and the end of the slide rod51close to the reinforcing rod221extends through the guide hole222to move the slide rod51in the length direction of the adjusting rod12.

Referring toFIG.1andFIG.5, a fixing shaft32extends through the beam3at one end thereof in its length direction. The periphery of the fixing shaft32is rotatably connected with a rotation tube322, whose peripheral wall is welded and fixedly with an upright rod321. The end of the upright rod321away from the fixing shaft32is slidably connected with a slidable sleeve6, and the side wall of the slidable sleeve6close to the wheel seat31is fixedly connected with a body rod61for fixing bicycle. The side wall of the slidable sleeve6close to the body rod61is threadedly connected with a fastening bolt63, which abuts against the side wall of the upright rod321to increase the connection stability of the slidable sleeve6and the upright rod321.

The side wall of the slidable sleeve6away from the body rod61is integrally formed with a mounting sleeve62, which is internally rotatably connected with a limiting plate621through a bearing pin. The end of the limiting plate621close to the upright rod321is integrally formed with a limiting tooth6211. The side wall of the upright rod321close to the limiting plate621is provided with meshing grooves3211that can be engaged with the limiting tooth6211. The meshing grooves3211extend in the length direction of the upright rod321.

A back shore622is connected between the end of the limiting plate621away from the limiting tooth6211and the inner wall of the slidable sleeve6. In this embodiment, the back shore622is a compression spring. The back shore622can push the limiting tooth6211of the limiting plate621to continuously contact the meshing groove3211through its own elastic force.

Referring toFIG.1andFIG.6, the periphery of the fixing shaft32is fixedly connected with a limiting tube323, the end of which and the end of the rotation tube322that are close to each other abut against each other. The side walls of the rotation tube322and of the limiting tube323that abut against each other are each integrally formed with a butt tooth plate3221that limits rotation of the rotation tube322. Two groups of butt tooth plates3221are in snap-fit relation with each other. When the limiting tube323is not subjected to an external force, the butt tooth plate3221rotation of the rotation tube322. When the rotation tube322is forcefully rotated, the two groups of butt tooth plates3221rotate relative to each other, so as to adjust the connection angle between the upright rod321and the fixing shaft32.

A fixing pipe326is integrally formed on the side wall of the butt tooth plate3221close to the fixing shaft32. The fixing pipe326is located inside the limiting tube323and fixedly connected to the periphery of the fixing shaft32. The end of the fixing pipe326away from the butt tooth plate3221is connected with a mounting ring plate324, which is welded and fixed to the periphery of the fixing shaft32and is fixedly connected with the fixing pipe326by screws.

The mounting ring plate324is located inside the limiting tube323, and a buffer325is connected between the mounting ring plate and the limiting tube323. In this embodiment, the buffer325is a spring. The buffer325fits over the fixing pipe326. One end of the buffer325abuts against the butt tooth plate3221, and the other end thereof abuts against the mounting ring plate324. When the rotation tube322rotates relative to the limiting tube323, the buffer325can absorb a part of vibration force of the limiting tube323and the butt tooth plate3221, thereby reducing damage to the limiting tube323and the butt tooth plate3221during rotation of the rotation tube322.

Referring toFIG.1andFIG.6, the inner wall of the limiting tube323is integrally formed with a plurality of limiting ribs3231, each of which extends in the length direction of the limiting tube323. The periphery of the mounting ring plate324is provided with a plurality of limiting notches3241fitting with the limiting ribs3231. The limiting ribs3231abut against the inner walls of the limiting notches3241to limit the rotation of the limiting tube323relative to the fixing shaft32.

Referring toFIG.6andFIG.7, each wheel seat31includes an arc-shaped receiver311, a connection part312is integrally connected to the lower part of the arc-shaped receiver311, and a bandage structure313. The arc-shaped receiver311is an arc-shaped plate whose upper surface is concaved downward, and the radian of the upper surface of the arc-shaped receiver311adapts to the radian of the wheel to receive the wheel.

The connection part312includes a fixing seat and a connecting block3121. The fixing seat includes a first side plate3122, a stop block3123, a second side plate3124, a butt block3125protruding downward from the bottom surface of the arc-shaped receiver311, which are connected end to end to form a mounting cavity for mounting the end of the beam3. The connecting block3121is a long strip protruding downward from the bottom surface of the arc-shaped receiver311. The connecting block3121is provided with a connecting hole through the arc-shaped receiver311. The side wall of the beam3close to the wheel seat31is provided with an abdicating notch30to be embedded by the lower part of the arc-shaped receiver311, so as to press the wheel seat31into the abdicating notch30, thus increasing connection stability of the wheel seat31and the beam3. When the wheel seat31is installed at the end of the beam3, the end of the beam3is inserted in the mounting cavity, the first side plate3122and the second side plate3124abuts against both sides of the beam3, respectively, the stop block3123abuts against the end face of the beam3, the lower end face of the butt block3125abuts against the top surface of the beam3, and the wheel seat is fixedly connected with the beam3by the screw3126which extends through the connecting hole.

Referring toFIG.7andFIG.8, the bandage structure313includes a bandage3131and a locking buckle3132. One end of the bandage3131is fixedly connected to the outer wall of one side of the arc-shaped receiver311, and the other end thereof is a movable end. The bandage3131is provided with a number of convex teeth in its length direction. The locking buckle3132includes a buckle seat3133, a locking block3134, a hinge shaft3135and a compression and torsion spring3136. The buckle seat3133is fixedly connected to the outer wall of the other side of the arc-shaped receiver311through screws. The side surface of the buckle seat3133away from the arc-shaped receiver311is provided with a locking groove that extends throughout the buckle seat from top to bottom. The two ends of the hinge shaft3135are respectively installed on the side walls of both sides of the locking groove, and the middle part of the locking block3134is rotatably connected to the hinge shaft3135. The torsion spring is sleeved over the hinge shaft3135. One foot of the torsion spring is fixedly connected to the side wall of the locking groove, and the other foot thereof abuts against the locking block3134. The torsion spring provides a compression force that continuously moves the lower end of the locking block3134towards the bottom of the locking groove. Two sides of the arc-shaped supporting plate are respectively provided with openings, the locking buckle3132and bandage3131are respectively located on the outer wall at the opening of the two sides of the arc-shaped receiver311. When it is necessary to bind, the user may press the upper end of the locking block3134towards the locking groove for a certain distance. The movable end of the bandage3131bridges the arc-shaped receiver311from above and extends through the locking groove from top to bottom. when the bandage3131is in position, the user may release the upper end of the locking block3134, such that the lower end of the locking block3134abuts against the gap between two adjacent convex teeth on the bandage3131to fix the bandage3131, so as to bind and fix the wheel located in the arc-shaped receiver311.

The implementation principle of the present embodiment is as follows:

When it is necessary to adjust the relative position of the carrier and the vehicle, the user may unscrew and remove the bolts inside the access holes110and pull the slide rod51, such that the limiting rod52presses the elastic piece53to slide away from the adjusting plates11, thereby the limiting rod52is disengaged from the limit notches111. And then the adjusting rod12can rotate relative to the adjusting plates11to adjust the connection angle between the adjusting rod12and the rear rod1. Then the user may release the slide rod51, thereby the pressure on the elastic piece53is reduced and the elastic piece will expand, to press the limiting rod52into the limit notches111for rapid positioning of the adjusting plates11and the adjusting rod12. Then the user can screw the bolt into the corresponding access holes110on the adjusting plates11at this time to realize a quick fixation of the adjusting rod12and the rear rod1.

When the limiting rod52is pressed into the limit notches111at the end of the adjusting plates11away from the rear rod1, the carrier can be stored to save the space occupied by the rack. When the limiting rod52is pressed into another group of the limit notches111of the adjusting plates11, the carrier can be quickly expanded to place a bicycle.

When it is necessary to adjust the relative position of the body rod61and the upright rod321, the user can first unscrew the bolt at the outer wall of the slidable sleeve6, and then press the end of the limiting plate621away from the limiting teeth6211, such that the back shore622will be elastically contracted under pressure, thereby the limiting teeth6211will be disengaged from the meshing grooves3211. At this time, the user can move the slidable sleeve6in the length direction of the upright rod321to adjust the relative position of the body rod61and the upright rod321.

After adjustment, the user may release the limiting plate621, thus the pressure on the back shore622is reduced and the back shore elastic expands to push the end of the limiting plate621with the limiting teeth6211to rotate towards the meshing grooves3211, realizing a quick positioning and fixed connection between the slidable sleeve6and the upright rod321. Finally, the user can screw the bolt at the outside of the slidable sleeve6, to increase connection stability between the slidable sleeve6and the upright rod321.

When it is necessary to adjust the angle between the upright rod321and the fixing shaft32, the user may hold the upright rod321and turn it to make the two butt tooth plates3221abutting against each other rotate rigidly relative to each other. After the rotation, the two butt tooth plates3221abutting against each other are engaged with each other, to limit the position of the upright rod321and the fixing shaft32, realizing a rapid adjustment of the angle between the upright rod321and the fixing shaft32.

Referring toFIG.9andFIG.10, a rotation gap8is remained between the adjusting rod12and the rear rod1, such that the adjusting rod12can rotate towards the ground. A driving component7is installed between the adjusting rod12and the adjusting plates11to adjust the relative position between the adjusting rod12and the rear rod1, so as to adjust the distance between the bicycle and the trunk.

Referring toFIG.10andFIG.11, the driving component7includes a slide rod51, a limiting rod52, a reset piece54and a trigger block55. The slide rod51is slidably installed inside the adjusting rod12, whose sliding direction is parallel to the length direction of the adjusting rod12. The end of the slide rod51away from the adjusting plates11is located between the mounting pieces2. In this embodiment, the slide rod51is a square rod, and the slide rod51and the adjusting rod12are mutually matched at joint to reduce shaking of the slide rod51during sliding.

In this embodiment, the reset piece54is a reset spring. The reset piece54is sleeved over the adjusting rod12. One end of the reset piece54in its length direction abuts against the limiting rod52, and the other end thereof abuts against the mounting piece2. The telescopic direction of the reset piece54is parallel to the length direction of the adjusting rod12, so that the reset piece54can push the limiting rod52to move towards the adjusting plates11through its own elastic force, so that the limiting rod52can stably lie in the limit notches111.

Referring toFIG.10andFIG.12, the trigger block55is rotatably connected to the end of the slide rod51away from the adjusting plates11through a bearing pin, and the side wall of the trigger block55is provided with a rotation gap441to be rotated into by the slide rod51. Both ends of the trigger block55in its length direction are bent away from the slide rod51. The side wall of the trigger block55close to the slide rod51is integrally formed with several anti-slip flanges443to increase the friction coefficient of the surface of the trigger block55. The end wall of the end of the trigger block55close to the ground is provided with a flat butt surface442.

The end of the mounting piece2away from the rear rod1is welded and fixed with a reinforcing rod221. The reinforcing rod221is provided with a guide hole222extending throughout it to be passed through by one end of the slide rod51away from the adjusting rod12. In this embodiment, the guide hole222is a square hole adapted to the reinforcing rod221, thus reducing the shaking phenomenon of the slide rod51during sliding.

The trigger block55is located on the side of the reinforcing rod221away from the adjusting rod12, and the side wall of the reinforcing rod221close to the trigger block55is welded and fixed with a fixing block93. The end of the slide rod51close to the trigger block55extends through the fixing block93, and the trigger block55abuts against the fixing block93.

When foot treads on the end of the trigger block55away from the ground, the trigger block55abuts against the fixing block93and rotate to pull the slide rod51and the limiting rod52to move away from the adjustment plates11, so as to rotate the adjusting rod12and the mounting piece2. When the butt surface442of the trigger block55abuts against the fixing block93, they can be in a stable abutting state, so as to keep the limiting rod52in the state of releasing away from the limit notches111, so as to rotate the adjusting rod12.

Referring toFIG.10andFIG.11, the end of the rear rod1close to the mounting piece2is welded and fixed with an extension plate9, and the end of the extension plate9close to the adjusting rod12is bent to form a supporting plate91for supporting the adjusting rod12. A reinforcing plate92is welded and fixed between the extension plate9and the supporting plate91to increase structural strength between them.

Referring toFIG.9andFIG.11, the side walls of two groups of adjusting plates11facing each other are glued with inner liners112. In this embodiment, the inner liner112is made of plastic. The side walls of the two groups of inner liners112facing each other respectively abut against the adjusting rod12, so as to reduce hard friction between the adjusting rod12and the adjusting plates11during rotation of the adjusting rod12.

Referring toFIG.9andFIG.13, in this embodiment, the wheel seat31is sleeved over the beam3, and inside of the wheel seat31is integrally formed with a butt arc-shaped surface211leaning against the outer wall of the beam3. The butt arc-shaped surface211increases the contact area between the wheel seat31and the beam3, thus improving connection stability between the wheel seat31and the beam3. The end of the beam3is threaded with a limiting bolt201, wherein contact between the limiting bolt201and the wheel seat31prevents the wheel seat31from removing from the beam3.

Referring toFIG.13, one side of the wheel seat31is fixedly connected with a restraining band212, and the other side is connected with a clamp seat213through a screw. The side wall of the clamp seat213away from the wheel seat31is provided with a recess2131. A latch2132is rotatably connected in the recess2131through a rotation shaft and a torsion spring. A space is remained between the latch2132and the clamp seat213to be passed through by the restraining band212. In this embodiment, the torsion spring is configured to drive the latch2132to rotate around the rotation shaft and to contact the clamp seat213. The latch2132abuts against the inner wall of recess2131to limit the rotation direction of the latch2132to reduce shaking of the latch2132. The restraining band212is passed through the wheel and inserted into the space between the latch2132and the clamp seat213. The latch2132is driven to clamp and fix the restraining band212in the recess2131through the torsion spring, so as to quickly fix the wheel on the wheel seat31.

The implementation principle is as follows:

Treading on the trigger block55with foot, so that the trigger block55abuts against the fixing block93and rotates. The rotating trigger block55drives the slide rod51and the limiting rod52to move away from the adjusting plates11, such that the reset piece54contracts elastically under pressure.

When the butt surface442abuts against the fixing block93, the tension on the trigger block55exerted by the reset piece54holds the trigger block55in a stable abutting state with the fixing block93, such that the limiting rod52is released from the limit notches111, so that the adjusting rod12and the adjusting plates11can rotate relative to each other.

Holding the mounting piece2, such that the adjusting rod12and the mounting piece2gradually turn towards the ground under their own gravity, and the mounting piece2moves the loaded bicycle away from the trunk gradually. The supporting plate91abuts against the adjusting rod12and supports the adjusting rod12to realize a stable tilt of the mounting piece2, so as to keep a safe distance of the bicycle on the mounting piece2from the vehicle trunk, so as to ensure a normal opening and closing of the trunk.

After the trunk has been opened and closed, the user can hold the mounting piece2, and then move the trigger block55to rotate with the foot, so that the butt surface442is out of the stable abutting with the fixing block93, and then the trigger block55rotates back and returns to its original state. The user can turn the adjusting rod12so that the slide groove121is aligned with the limit notches111, and the reset piece54pushes the limiting rod52to move towards the adjusting plates11through its own elastic force, and presses the limiting rod52into the limit notches111again, thus realizing a fixing connection between the adjusting rod12and the adjusting plate11.