CN217917786U - Bicycle frame at tail of automobile - Google Patents

Abstract

The utility model discloses a bicycle frame at the tail part of an automobile, which comprises a connecting beam and a supporting beam, wherein the middle part of the supporting beam is fixedly connected with one end of the connecting beam, two wheel seats are arranged on two sides of the supporting beam, a connecting seat and a swing arm are arranged at the joint of the supporting beam and the connecting beam, the connecting seat comprises two first side plates which are distributed on two sides of the supporting beam, a limiting plate is fixedly arranged between the two first side plates, one end of the swing arm extends into the space between the two first side plates, the swing arm is rotationally connected with the first side plates through a first connecting shaft, and when the swing arm is placed along the vertical direction, the swing arm is contacted with the limiting plate; the advantage is that the stability is better.

Description

Bicycle frame at tail of automobile

Technical Field

The utility model belongs to the technical field of the car articles for use, especially, relate to a car afterbody bicycle frame.

Background

With the improvement of social and economic levels, the popularity of various household and commercial cars is greatly increased, the cars can carry people, and travel articles such as luggage, tents and the like can be loaded on the roof of the car by installing luggage racks, but the loading of bicycles by using the luggage racks on the roof is very inconvenient.

Therefore, a bicycle frame fixed at the tail of an automobile is designed, for example, a vehicle-mounted bicycle bracket convenient to rotate is CN202020665226.4, the bicycle bracket is connected with the tail of the automobile through an L-shaped fixing rod, and compared with a roof luggage rack, the bicycle bracket is convenient to use, the technical scheme adopts a mode that a fixing elastic buckle is matched with an elastic buckle hole to fix a vertical rod, the fixing elastic buckle is located at the bottom end of the vertical rod, the distance between the fixing elastic buckle and a hinge point is far shorter than the distance between the top end of the vertical rod and the hinge point, so that the vertical rod is difficult to effectively fix by only adopting the fixing elastic buckle, the stability is poor, and an improvement space exists.

Disclosure of Invention

The utility model aims to solve the technical problem that a better car afterbody bicycle frame of stability is provided.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a car afterbody bicycle frame, includes tie-beam and a supporting beam, a supporting beam the middle part with the one end fixed connection of tie-beam, a supporting beam's both sides all be provided with two wheel seats, a supporting beam with the junction of tie-beam be provided with connecting seat and swing arm, the connecting seat including distribute be in two first curb plates of a supporting beam both sides, two first curb plates between the fixed limiting plate that is provided with, the one end of swing arm stretch into two first curb plates between, the swing arm pass through first connecting axle with first curb plate rotate to be connected, work as the swing arm when putting along vertical direction, the swing arm with the limiting plate contact.

The side of the swing arm is provided with a first locking mechanism, and when the swing arm is placed along the vertical direction or the horizontal direction, the swing arm is locked with the first side plate through the first locking mechanism. In the structure, the swing arm and the first side plate are locked through the first locking mechanism, the swing arm is prevented from swinging randomly, and the safety is good.

First locking mechanism include first rotation seat, first footboard, first compression spring and first bolt, first curb plate on be provided with first arc hole, the lateral wall in first arc hole on be provided with along the first breach that vertical direction extends and along the second breach that the horizontal direction extends, first rotation seat fixed the setting be in the side of swing arm on, the top undercut of first rotation seat form first mounting groove, the side of first rotation seat on be provided with the first bar hole of first mounting groove intercommunication, the bottom of first footboard stretch into first mounting groove in, first compression spring be located the tank bottom of first mounting groove with the bottom of first footboard between, first bolt set up the lower part of first footboard, the tip of first bolt pass behind first bar hole with first breach or second breach joint. Initially, the swing arm is vertical putting, first bolt and the cooperation of first breach joint, when trampling first footboard, first footboard slides to first mounting groove, first compression spring compression and production resilience force, first bolt breaks away from first breach and moves to first arc downthehole, the swing arm can rotate around first connecting axle this moment, then rotatory swing arm makes it be the level and puts, make first footboard to first mounting groove outer sliding with the help of first compression spring's resilience force, first bolt moves in the second breach in order to lock swing arm and first curb plate once more, of course, adopt the same mode can with first bolt once more move in the first breach in order to lock swing arm and first curb plate, and the operation is simple, the stability is better.

The first side plate is provided with a first through hole, the first through hole is located at the circle center of the first arc-shaped hole, a first shaft hole communicated with the first through hole is formed in the side face of the first rotating seat, and the first shaft hole and the first through hole are penetrated by the first connecting shaft.

This car afterbody bicycle frame still including be used for with car end connection's installation pipe, the installation pipe on the fixed folding seat that is provided with, the tie-beam the other end with folding seat connect, the tie-beam can take place for folding seat the rotation in the upper and lower side folding. In this structure, through setting up folding seat to make the tie-beam can the tilting, be convenient for fold and accomodate or install the bicycle.

Folding seat including distributing two second curb plates of installation pipe both sides, the other end of tie-beam be provided with and stretch into two the second curb plate between the second rotate the seat, the second rotate the seat pass through the second connecting axle with the second curb plate rotate and be connected, the second rotate the seat on be provided with second locking mechanical system, work as the tie-beam along vertical direction or when putting along the horizontal direction, the second rotate the seat pass through second locking mechanical system with the locking of second curb plate.

Second locking mechanical system include second footboard, second compression spring and second bolt, the second curb plate on be provided with second arc hole, the lateral wall in second arc hole on be provided with along the third breach that vertical direction extends and the fourth breach that extends along the horizontal direction, the second rotate the top undercut of seat and form the second mounting groove, the second rotate the side of seat on be provided with the second bar hole of second mounting groove intercommunication, the bottom of second footboard stretch into the second mounting groove in, second compression spring be located the tank bottom of second mounting groove with the bottom of second footboard between, the second bolt set up the lower part of second footboard, the tip of second bolt pass behind the second bar hole with third breach or fourth breach joint. Initially, the tie-beam is the level and puts, first bolt and third breach joint cooperation, when trampling the second footboard, the second footboard slides in the second mounting groove, second compression spring compression produces the resilience force, the second bolt breaks away from the third breach and moves to in the second arc hole, the tie-beam can rotate around the second connecting axle this moment, then rotatory tie-beam makes it be vertical putting, make the second footboard slide outside the second mounting groove with the help of second compression spring's resilience force, the second bolt moves in the fourth breach in order to lock tie-beam and second curb plate once more, of course, adopt the same mode can with the second bolt once more move in the third breach in order to lock tie-beam and second curb plate, and the operation is simple, and the stability is better.

The second arc hole include linkage segment and extension, the central angle of linkage segment be 90, the third breach with the fourth breach be located two tip of linkage segment, the extension be located the one end of linkage segment, when the second bolt stretch into when the extension, the tie-beam slope downwards. In this structure, through setting up the extension, when the second bolt stretches into the extension, the tie-beam can be the slope and put the state downwards, and the vapour car trunk is opened to the people of being convenient for, and it is comparatively convenient to use.

The second side plate is provided with a second through hole, the second through hole is positioned at the circle center of the second arc-shaped hole, a second shaft hole communicated with the second through hole is formed in the side face of the second rotating seat, and the second connecting shaft penetrates through the second shaft hole and the second through hole.

The both sides of swing arm all be provided with the pothook, the link of pothook pass through the locking subassembly with the swing arm locking cooperation, work as the swing arm rotate to predetermineeing the angle after, slide the pothook so that the pothook hold the bicycle frame tightly, easy operation facilitates the use.

The link of pothook be provided with the cover the swing arm on the sleeve, the outside of swing arm be provided with the bar tooth's socket, the sleeve on be provided with rotary switch and tool to lock, rotary switch's tip be provided with bar tooth's socket meshed joint portion, the tool to lock be used for with rotary switch with the sleeve locking. After joint portion and bar tooth's socket meshing, will rotate the switch locking through the tool to lock, avoid rotating the switch and probably take place to rotate and lead to joint portion to break away from the bar tooth's socket, stability is better.

The wheel seat comprises a sleeve joint seat, a cross rod, an installation block and an arc-shaped supporting plate, the sleeve joint seat is sleeved on the supporting beam, the sleeve joint seat is fixedly connected with the installation block through the cross rod, a clamping groove is fixedly arranged on the lower end face of the arc-shaped supporting plate, and the clamping groove is matched with the installation block in a clamping mode.

Compared with the prior art, the utility model has the advantages of through setting up the limiting plate, the limiting plate not only plays limiting displacement, conveniently overturns the swing arm to vertical state, and the limiting plate is compared in fixed bullet knot, and structural strength is higher, and stability is better.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a schematic structural view of the connecting seat of the present invention;

fig. 4 is a schematic view of a partial explosion structure of the present invention;

fig. 5 is a schematic diagram of a local explosion structure of the present invention;

fig. 6 is a schematic structural view of a second side plate of the present invention;

fig. 7 is a schematic structural view of the connecting beam of the present invention when it inclines downward;

fig. 8 is a schematic structural view of the hook of the present invention;

fig. 9 is a schematic view of the explosion structure of the hook of the present invention;

fig. 10 is an exploded view of the wheel seat of the present invention;

fig. 11 is a schematic structural view of the arc-shaped supporting plate of the present invention.

In the figure: 1. a connecting beam; 11. a second rotating base; 111. a second mounting groove; 112. a second strip-shaped hole; 113. a second shaft hole; 12. a second connecting shaft; 2. a support beam; 21. a wheel seat; 211. a socket joint seat; 2111. screwing the bolt; 212. a cross bar; 213. mounting a block; 214. an arc-shaped supporting plate; 2141. a card slot; 215. binding bands; 3. a connecting seat; 31. a first side plate; 311. a first arcuate aperture; 312. a first notch; 313. a second notch; 314. a first through hole; 32. a limiting plate; 4. swinging arms; 41. a first connecting shaft; 42. a first locking mechanism; 421. a first rotating base; 4211. a first mounting groove; 4212. a first bar-shaped hole; 4213. a first shaft hole; 422. a first pedal; 423. a first latch; 43. a strip-shaped tooth socket; 5. installing a pipe; 6. a folding seat; 61. a second side plate; 611. a second arcuate aperture; 611a, a connecting segment; 611b, an extension section; 612. a third notch; 613. a fourth notch; 614. a second perforation; 615. a protection plate; 7. a second locking mechanism; 71. a second pedal; 72. a second bolt; 8. a hook; 81. a sleeve; 811. mounting holes; 82. a rotary switch; 821. a clamping part; 822. locking the groove; 83. a lock; 831. a lock body; 832. a key hole.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The first embodiment is as follows: as shown in fig. 1 and 2, an automobile tail bicycle frame, including tie-beam 1 and a supporting beam 2, the middle part of a supporting beam 2 and the one end fixed connection of tie-beam 1, the both sides of a supporting beam 2 all are provided with two wheel seats 21, two wheel seats 21 that lie in same side are used for cooperating with the front and back wheel of a bicycle, the junction of a supporting beam 2 and tie-beam 1 is provided with connecting seat 3 and swing arm 4, connecting seat 3 is including two first curb plates 31 of distributing in a supporting beam 2 both sides, it is provided with limiting plate 32 to fix between two first curb plates 31, the one end of swing arm 4 stretches into between two first curb plates 31, swing arm 4 rotates with first curb plate 31 through first connecting axle 41 and is connected, when swing arm 4 puts along vertical direction, swing arm 4 contacts with limiting plate 32.

In this embodiment, supporting beam 2 and tie-beam 1 are the cross setting, and limiting plate 32 is mutually perpendicular with supporting beam 2's up end, and limiting plate 32 and two first curb plate 31 integrated into one piece set up, and limiting plate 32 and two first curb plate 31 are transversal to personally submit the U-shaped, and structural strength is better.

Example two: as shown in fig. 2, 3 and 4, the rest of the embodiment is the same as the first embodiment, except that a first locking mechanism 42 is provided on a side surface of the swing arm 4, and when the swing arm 4 is placed in a vertical direction or a horizontal direction, the swing arm 4 is locked with the first side plate 31 by the first locking mechanism 42.

In this embodiment, the first locking mechanism 42 includes a first rotating seat 421, a first pedal 422, a first compression spring (not shown in the drawings), and a first bolt 423, a first arc hole 311 is provided on the first side plate 31, a first notch 312 extending in the vertical direction and a second notch 313 extending in the horizontal direction are provided on a side wall of the first arc hole 311, the first rotating seat 421 is fixedly disposed on a side surface of the swing arm 4, a top end of the first rotating seat 421 is recessed downward to form a first mounting groove 4211, a first strip hole 4212 communicating with the first mounting groove 4211 is provided on a side surface of the first rotating seat 421, a bottom of the first pedal 422 extends into the first mounting groove 4211, the first compression spring is located between a bottom of the first mounting groove 4211 and a bottom of the first pedal 422, the first bolt 423 is disposed on a lower portion of the first pedal 422, and an end of the first bolt 423 passes through the first strip hole 4212 and then is connected with the first notch 312 or the second notch 313. Preferably, the first rotating seat 421 is located between the swing arm 4 and the limiting plate 32, and at this time, when the swing arm 4 is placed along the vertical direction, the swing arm 4 indirectly contacts the limiting plate 32 through the rotating seat 421.

In this embodiment, the first side plate 31 is provided with a first through hole 314, the first through hole 314 is located at a center of the first arc-shaped hole 311, the side surface of the first rotating base 421 is provided with a first shaft hole 4213 communicated with the first through hole 314, the first connecting shaft 41 penetrates through the first shaft hole 4213 and the first through hole 314, wherein the first shaft hole 4213, the first compression spring and the first pedal 422 are sequentially distributed along a straight line direction.

Initially, the swing arm 4 is vertical and puts, first bolt 423 cooperates with first breach 312 joint, when trampling first footboard 422, first footboard 422 slides to first mounting groove 4211, first compression spring compression and production resilience force, first bolt 423 breaks away from first breach 312 and moves to in the first arc hole 311, swing arm 4 can rotate around first connecting axle 41 this moment, then rotatory swing arm 4 makes it be horizontal and puts, make first footboard 422 to first mounting groove 4211 external slip with the help of first compression spring's resilience force, first bolt 423 moves to in the second breach 313 in order to lock swing arm 4 and first curb plate 31 once more, of course, adopt the same mode can move first bolt 423 once more in first breach 312 in order to lock swing arm 4 and first curb plate 31.

Example three: as shown in fig. 1, the rest of the embodiments are the same as those of the first embodiment, and the difference is that the bicycle frame at the rear of the automobile further includes a mounting tube 5 for connecting with the rear of the automobile, a folding seat 6 is fixedly arranged on the mounting tube 5, the other end of the connecting beam 1 is connected with the folding seat 6, and the connecting beam 1 can be rotated and folded up and down relative to the folding seat 6.

Example four: as shown in fig. 1 and 5, the remaining parts are the same as those of the embodiment, and the difference is that the folding seat 6 includes two second side plates 61 distributed at both sides of the installation tube 5, the other end of the connection beam 1 is provided with a second rotary seat 11 extending between the two second side plates 61, the second rotary seat 11 is rotatably connected with the second side plates 61 through a second connection shaft 12, the second rotary seat 11 is provided with a second locking mechanism 7, and when the connection beam 1 is placed along the vertical direction or the horizontal direction, the second rotary seat 11 is locked with the second side plates 61 through the second locking mechanism 7.

In this embodiment, the second locking mechanism 7 includes a second pedal 71, a second compression spring (not shown in the drawings), and a second bolt 72, a second arc-shaped hole 611 is disposed on the second side plate 61, a third notch 612 extending in the vertical direction and a fourth notch 613 extending in the horizontal direction are disposed on a side wall of the second arc-shaped hole 611, a top end of the second rotating seat 11 is recessed downward to form a second mounting groove 111, a second bar-shaped hole 112 communicating with the second mounting groove 111 is disposed on a side surface of the second rotating seat 11, a bottom of the second pedal 71 extends into the second mounting groove 111, the second compression spring is located between a bottom of the second mounting groove 111 and a bottom of the second pedal 71, the second bolt 72 is disposed at a lower portion of the second pedal 71, and an end of the second bolt 72 passes through the second bar-shaped hole 112 and then is connected to the third notch 612 or the fourth notch 613.

Initially, the connection beam 1 is horizontally placed, the first pin 423 is in clamping fit with the third notch 612, when the second pedal 71 is stepped on, the second pedal 71 slides in the second installation groove 111, the second compression spring compresses and generates resilience, the second pin 72 is separated from the third notch 612 and moves into the second arc-shaped hole 611, at this time, the connection beam 1 can rotate around the second connection shaft 12, then the connection beam 1 is rotated to be vertically placed, the second pedal 71 slides out of the second installation groove 111 by virtue of the resilience of the second compression spring, the second pin 72 moves into the fourth notch 613 to lock the connection beam 1 and the second side plate 61 again, and of course, the second pin 72 can move into the third notch 612 again to lock the connection beam 1 and the second side plate 61 in the same manner.

Example five: as shown in fig. 5 and 6, the remaining portions are the same as the fourth embodiment, except that the second arc-shaped hole 611 includes a connection section 611a and an extension section 611b, the central angle of the connection section 611a is 90 °, the third notch 612 and the fourth notch 613 are located at both ends of the connection section 611a, the extension section 611b is located at one end of the connection section 611a, and when the second pin 72 is inserted into the extension section 611b, the connection beam 1 is inclined downward (see fig. 7).

In this embodiment, the second side plate 61 is provided with a second through hole 614, the second through hole 614 is located at the center of the second arc-shaped hole 611, the side surface of the second rotating base 11 is provided with a second shaft hole 113 communicated with the second through hole 614, the second connecting shaft 12 penetrates through the second shaft hole 113 and the second through hole 614, and the second connecting shaft 12, the second compression spring, and the second pedal 72 are sequentially distributed along the linear direction.

In this embodiment, a protection plate 615 is further disposed on the outer side surface of the second side plate 61, the protection plate 615 is matched with the second arc-shaped hole 611, the third notch 612 and the fourth notch 613, the protection plate 615 is used for preventing a worker from directly contacting the second bolt 72, and safety is good.

Example six: as shown in fig. 1, 8 and 9, the rest of the embodiment is the same as the first embodiment, except that the two sides of the swing arm 4 are both provided with hooks 8, the connecting end of the hook 8 is locked and matched with the swing arm 4 through a locking assembly, and after the swing arm 4 rotates to a preset angle, the hook 8 is slid to enable the hook 8 to hug the bicycle frame, and the bicycle frame is preferably a bicycle beam.

In this embodiment, the connecting end of the hook 8 is provided with a sleeve 81 sleeved on the swing arm 4, the outer side of the swing arm 4 is provided with a strip-shaped tooth groove 43, the sleeve 81 is provided with a rotary switch 82 and a lock 83, the end of the rotary switch 82 is provided with a clamping portion 821 meshed with the strip-shaped tooth groove 43, and the lock 83 is used for locking the rotary switch 82 and the sleeve 81. Under normal conditions, the joint part 821 of the rotary switch 82 is engaged with the strip-shaped tooth socket 43, so as to limit the movement of the sleeve 81, the other end of the rotary switch 82 opposite to the joint part 821 is pressed, the joint part 821 is rotated outwards and is separated from the strip-shaped tooth socket 43, the sleeve 81 can slide along the swing arm 4 so as to adjust the position of the hook 8, so as to be matched with different bicycle crossbeams, furthermore, a torsional spring (not shown in the figure) is arranged at the hinged position of the rotary switch 82 and the sleeve 81, so that the joint part 821 is always engaged with the strip-shaped tooth socket 43 when the rotary switch 82 does not have external force.

In this embodiment, a side surface of the rotary switch 82 is provided with a locking groove 822, a side surface of the sleeve 81 is provided with a mounting hole 811 communicated with the locking groove 822, the lock 83 includes a lock body 831 installed in the mounting hole 811, one end of the lock body 831 extends into the locking groove 822, the other end of the lock body 831 is provided with a keyhole 832, when the lock body 831 and the locking groove 822 are locked by a key, the rotary switch 82 is locked, and when the lock body 831 and the locking groove 822 are unlocked by the key, the rotary switch 82 can rotate.

Example seven: as shown in fig. 1, 10 and 11, the rest of the embodiment is the same as the first embodiment, and the difference is that the wheel seat 21 includes a socket 211, a cross rod 212, a mounting block 213 and an arc-shaped supporting plate 214, the socket 211 is sleeved on the supporting beam 2, the socket 211 is fixedly connected with the mounting block 213 through the cross rod 212, a clamping groove 2141 is fixedly arranged on the lower end surface of the arc-shaped supporting plate 214, and the clamping groove 2141 is in clamping fit with the mounting block 213. Further, the locking groove 2141 is fixed to the mounting block 213 by a bolt and a nut to ensure a stable connection therebetween.

In this embodiment, the socket 211 is provided with a screw bolt 2111 for fastening, the strap 215 is spanned above the arc-shaped supporting plate 214, and the front and rear wheels are fixed by the strap 215 after being embedded in the arc-shaped supporting plate 214, so that the front and rear wheels are not easy to shake left and right, and the installation is more convenient.

Claims (12)

1. The utility model provides a car afterbody bicycle frame, includes tie-beam and a supporting beam, a supporting beam the middle part with the one end fixed connection of tie-beam, a supporting beam's both sides all be provided with two wheel seats, its characterized in that a supporting beam with the junction of tie-beam be provided with connecting seat and swing arm, the connecting seat including distributing two first curb plates of a supporting beam both sides, two first curb plates between the fixed limiting plate that is provided with, the one end of swing arm stretch into two first curb plate between, the swing arm pass through first connecting axle with first curb plate rotate and connect, work as the swing arm when putting along vertical direction, the swing arm with the limiting plate contact.

2. The bicycle frame at the rear part of an automobile according to claim 1, characterized in that a first locking mechanism is arranged on the side of the swing arm, when the swing arm is placed along the vertical direction or the horizontal direction, the swing arm is locked with the first side plate through the first locking mechanism.

3. The bicycle rack with the automobile tail according to claim 2, wherein the first locking mechanism comprises a first rotating seat, a first pedal, a first compression spring and a first bolt, a first arc-shaped hole is formed in the first side plate, a first notch extending in the vertical direction and a second notch extending in the horizontal direction are formed in the side wall of the first arc-shaped hole, the first rotating seat is fixedly arranged on the side surface of the swing arm, the top end of the first rotating seat is recessed downwards to form a first mounting groove, a first strip-shaped hole communicated with the first mounting groove is formed in the side surface of the first rotating seat, the bottom of the first pedal extends into the first mounting groove, the first compression spring is located between the bottom of the first pedal and the bottom of the first mounting groove, the first bolt is arranged on the lower portion of the first pedal, and the end of the first bolt is clamped with the first notch or the second notch after passing through the first strip-shaped hole.

4. The bicycle frame with the tail part as claimed in claim 3, wherein the first side plate has a first through hole at the center of the first arc hole, the first rotating seat has a first axle hole on its side for communicating with the first through hole, and the first connecting axle is disposed through the first axle hole and the first through hole.

5. The bicycle frame at the tail part of the automobile as claimed in claim 1, further comprising a mounting tube for connecting with the tail part of the automobile, wherein a folding seat is fixedly arranged on the mounting tube, the other end of the connecting beam is connected with the folding seat, and the connecting beam can be rotated and folded up and down relative to the folding seat.

6. The bicycle frame at the rear part of an automobile according to claim 5, characterized in that the folding seat comprises two second side plates distributed at two sides of the mounting tube, the other end of the connecting beam is provided with a second rotating seat extending between the two second side plates, the second rotating seat is rotatably connected with the second side plates through a second connecting shaft, the second rotating seat is provided with a second locking mechanism, and when the connecting beam is arranged along the vertical direction or the horizontal direction, the second rotating seat is locked with the second side plates through the second locking mechanism.

7. The bicycle rack with the automobile tail according to claim 6, wherein the second locking mechanism comprises a second pedal, a second compression spring and a second bolt, a second arc-shaped hole is formed in the second side plate, a third notch extending in the vertical direction and a fourth notch extending in the horizontal direction are formed in the side wall of the second arc-shaped hole, the top end of the second rotating seat is recessed downwards to form a second mounting groove, a second strip-shaped hole communicated with the second mounting groove is formed in the side face of the second rotating seat, the bottom of the second pedal extends into the second mounting groove, the second compression spring is located between the bottom of the second mounting groove and the bottom of the second pedal, the second bolt is arranged on the lower portion of the second pedal, and the end portion of the second bolt is clamped with the third notch or the fourth notch after passing through the second strip-shaped hole.

8. The bicycle frame for the rear part of an automobile according to claim 7, wherein the second arc-shaped hole includes a connection section and an extension section, the central angle of the connection section is 90 °, the third notch and the fourth notch are located at both ends of the connection section, the extension section is located at one end of the connection section, and when the second pin is inserted into the extension section, the connection beam is inclined downward.

9. The bicycle frame with the automobile tail according to claim 7, wherein a second through hole is formed in the second side plate and located at the center of the second arc-shaped hole, a second shaft hole communicated with the second through hole is formed in the side face of the second rotating seat, and the second connecting shaft penetrates through the second shaft hole and the second through hole.

10. The bicycle frame at the tail of an automobile as claimed in claim 1, wherein the two sides of the swing arm are respectively provided with a hook, the connecting end of the hook is locked and matched with the swing arm through a locking assembly, and when the swing arm rotates to a preset angle, the hook slides to enable the hook to clasp the bicycle frame.

11. The bicycle frame at the tail of an automobile as claimed in claim 10, wherein the connecting end of the hook is provided with a sleeve sleeved on the swing arm, a bar-shaped tooth socket is arranged on the outer side of the swing arm, the sleeve is provided with a rotary switch and a lock, the end of the rotary switch is provided with a clamping part engaged with the bar-shaped tooth socket, and the lock is used for locking the rotary switch and the sleeve.

12. The bicycle frame at the tail of an automobile according to claim 1, wherein the wheel seat comprises a sleeve joint seat, a cross rod, an installation block and an arc-shaped supporting plate, the sleeve joint seat is sleeved on the supporting beam, the sleeve joint seat is fixedly connected with the installation block through the cross rod, a clamping groove is fixedly arranged on the lower end face of the arc-shaped supporting plate, and the clamping groove is in clamping fit with the installation block.

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