Aluminum alloy bicycle folding vertical pipe

Abstract

The utility model provides an aluminum alloy bicycle folding vertical pipe which comprises a rotating piece, an installation cylinder is fixedly installed on one side of the outer portion of the rotating piece, an end cover is fixedly installed at one end of the installation cylinder, an insertion nail is installed in the installation cylinder in a sliding mode, and a limiting ring is fixedly installed outside the insertion nail and located in the installation cylinder. According to the aluminum alloy bicycle folding stand pipe, when the stand pipe needs to be folded, the bolt is firstly detached, then the plug pin is lifted upwards through the handle, the plug pin drives the limiting ring to move upwards, the spring is compressed, the bottom end of the plug pin leaves the positioning groove, the telescopic sleeve and the rotating piece can rotate, and then folding is effectively completed; when unfolding is needed, the plug pin is lifted through the handle, the telescopic sleeve is rotated, the clamping block enters the clamping groove, the handle is slowly loosened, due to the reset effect of the spring, the plug pin moves downwards, the bottom end of the plug pin penetrates through the clamping block through the positioning groove, and the telescopic sleeve is effectively and preliminarily fixed.

Description

Technical Field

[0001] The utility model relates to the field of foldable stand pipes, in particular to an aluminum alloy bicycle foldable stand pipe. Background Art

[0002] Riding a bicycle is not only environmentally friendly, but also exercises the rider's legs during riding, which is beneficial to people's health. However, when the distance is long and the subway or bus needs to be taken, the bicycle is not easy to carry due to its large structure. By setting a foldable seat tube, the bicycle can be folded, making it convenient to carry the bicycle.

[0003] However, the folding seat tubes in the existing market are mostly fixed by bolts during use. If there is vibration during long-term riding, the bolts will become loose, resulting in reduced stability of the bicycle frame, which is prone to falling and reduced safety.

[0004] Therefore, it is necessary to provide an aluminum alloy bicycle folding stem to solve the above technical problems. Summary of the invention

[0005] The utility model provides an aluminum alloy bicycle folding seat tube, which solves the problem that the folding seat tubes in the existing market are mostly fixed by bolts during use, and the bolts will become loose if there is vibration during long-term riding, resulting in reduced stability of the bicycle frame, easy fall and reduced safety.

[0006] The utility model provides an aluminum alloy bicycle folding stem, comprising: a rotating part, a mounting cylinder is fixedly installed on one side of the outer part of the rotating part, an end cover is fixedly installed on one end of the mounting cylinder, a pin is slidably installed inside the mounting cylinder, a limiting ring is fixedly installed outside the pin and located inside the mounting cylinder, a spring is sleeved outside the pin and located between the limiting ring and the end cover, one end of the pin passes through the end cover and is fixedly installed with a handle, a slot is provided on one side of the outer part of the rotating part and located below the mounting cylinder, a telescopic sleeve is rotatably installed on the outer part of the rotating part through a hinge, a clamping block is fixedly installed on one end of the telescopic sleeve, the clamping block is adapted to the clamping slot, a positioning slot is provided on one side of the outer part of the clamping block, and the other end of the pin passes through the clamping block through the positioning slot.

[0007] Preferably, first fixing blocks are welded to the outer side of the rotating member and the outer sides of the slot, and there are two first fixing blocks, and first mounting holes are formed on the outer sides of the two first fixing blocks.

[0008] Preferably, second fixing blocks are fixedly installed on one end of the telescopic sleeve and on both sides of the outside of the clamping block, and there are two second fixing blocks, and a second mounting hole is opened on one side of the outside of the two second fixing blocks.

[0009] Preferably, a bolt is provided between the first fixing block and the second fixing block, and a vertical center line of the first mounting hole coincides with a vertical center line of the second mounting hole.

[0010] Preferably, the bottom end of the bolt passes through the first fixing block and the second fixing block through the first mounting hole and the second mounting hole respectively, and one end of the rotating member is welded to a mounting flange.

[0011] Preferably, a telescopic rod is slidably mounted inside the telescopic sleeve, and a locking assembly is provided at the other end of the telescopic sleeve.

[0012] Compared with the related art, the aluminum alloy bicycle folding stem provided by the utility model has the following beneficial effects:

[0013] When the riser needs to be folded, the bolt is first removed, and then the pin is lifted upwards through the handle. The pin drives the limit ring to move upwards. At this time, the spring is compressed, and the bottom end of the pin leaves the positioning groove. At this time, the telescopic sleeve and the rotating part can rotate, thereby effectively completing the folding. When it needs to be unfolded, the pin is lifted through the handle, the telescopic sleeve is rotated, the block enters the inside of the slot, and the handle is slowly loosened. Due to the resetting effect of the spring, the pin moves downward, and the bottom end of the pin passes through the positioning groove and penetrates the block, effectively performing a preliminary fixation on the telescopic sleeve. The simple structure improves practicality, and if the bolt is loose, the stability of the frame will not be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of a preferred embodiment of an aluminum alloy bicycle folding seat tube provided by the utility model;

[0015] Figure 2 for Figure 1 The schematic diagram of the moving block installation structure is shown;

[0016] Figure 3 for Figure 1 Schematic diagram of the splint installation structure shown.

[0017] In the figure: 1. rotating part; 2. mounting cylinder; 3. end cover; 4. pin; 5. limiting ring; 6. spring; 7. handle; 8. telescopic sleeve; 9. slot; 10. block; 11. positioning slot; 12. first fixed block; 13. first mounting hole; 14. second fixed block; 15. second mounting hole; 16. bolt; 17. mounting flange; 18. telescopic rod; 19. locking assembly. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0019] Embodiment: A foldable aluminum alloy bicycle stem, such as Figure 1-Figure 3 As shown, it comprises: a rotating member 1, a mounting tube 2 is fixedly installed on one side of the outer part of the rotating member 1, an end cover 3 is fixedly installed on one end of the mounting tube 2, a pin 4 is slidably installed inside the mounting tube 2, a limit ring 5 is fixedly installed outside the pin 4 and inside the mounting tube 2, a spring 6 is sleeved outside the pin 4 and between the limit ring 5 and the end cover 3, one end of the pin 4 passes through the end cover 3 and is fixedly installed with a handle 7, a card slot 9 is provided on one side of the outer part of the rotating member 1 and below the mounting tube 2, a telescopic sleeve 8 is rotatably installed on the outer side of the rotating member 1 through a hinge, a card block 10 is fixedly installed on one end of the telescopic sleeve 8, the card block 10 is adapted to the card slot 9, a positioning groove 11 is provided on one side of the outer part of the card block 10, and the card slot 9 is adapted to the card slot 9. The other end of the nail 4 passes through the block 10 through the positioning groove 11. When the riser needs to be folded, the bolt 16 is first removed, and then the nail 4 is lifted up through the handle 7. The nail 4 drives the limit ring 5 to move upward. At this time, the spring 6 is compressed, and the bottom end of the nail 4 leaves the positioning groove 11. At this time, the telescopic sleeve 8 and the rotating member 1 can rotate, thereby effectively completing the folding. When it is necessary to unfold, the nail 4 is lifted up through the handle 7, the telescopic sleeve 8 is rotated, and the block 10 enters the inside of the slot 9. The handle 7 is slowly loosened. Due to the reset effect of the spring 6, the nail 4 moves downward, and the bottom end of the nail 4 passes through the block 10 through the positioning groove 11, which effectively performs a preliminary fixing treatment on the telescopic sleeve 8. The simple structure improves practicality.

[0020] A first fixing block 12 is welded and connected to the outer side of the rotating member 1 and the outer sides of the card slot 9, and the number of the first fixing blocks 12 is two, and a first mounting hole 13 is opened on the outer side of the two first fixing blocks 12. A second fixing block 14 is fixedly installed on one end of the telescopic sleeve 8 and on the outer sides of the card block 10, and the number of the second fixing blocks 14 is two, and a second mounting hole 15 is opened on the outer side of the two second fixing blocks 14. A bolt 16 is provided between the first fixing block 12 and the second fixing block 14, and the vertical center line of the first mounting hole 13 coincides with the vertical center line of the second mounting hole 15. After the pin 4 is initially positioned, the bottom end of the bolt 16 passes through the first mounting hole 13 and the second mounting hole 15 respectively, thereby effectively fixing the first fixing block 12 and the second fixing block 14, so that the rotating member 1 is fixed to the telescopic sleeve 8, thereby improving the installation strength.

[0021] The bottom end of the bolt 16 passes through the first mounting hole 13 and the second mounting hole 15 and penetrates the first fixing block 12 and the second fixing block 14 respectively. A mounting flange 17 is welded to one end of the rotating member 1. A telescopic rod 18 is slidably mounted inside the telescopic sleeve 8. A locking assembly 19 is provided at the other end of the telescopic sleeve 8. The mounting flange 17 facilitates the installation of the seat tube and the bicycle. The locking assembly 19 is loosened to allow the telescopic rod 18 to slide inside the telescopic sleeve 8, thereby changing the length of the seat tube. After the length adjustment is completed, the locking assembly 19 is locked.

[0022] The working principle of the foldable aluminum alloy bicycle standpipe provided by the utility model is as follows:

[0023] The first step: when the vertical tube needs to be folded, the bolt 16 is first removed, and then the pin 4 is lifted up through the handle 7. The pin 4 drives the limit ring 5 to move upward. At this time, the spring 6 is compressed, and the bottom end of the pin 4 leaves the positioning groove 11. At this time, the telescopic sleeve 8 and the rotating member 1 can rotate, thereby effectively completing the folding. When it is necessary to unfold, the pin 4 is lifted up through the handle 7, the telescopic sleeve 8 is rotated, the block 10 enters the inside of the slot 9, and the handle 7 is slowly loosened. Due to the reset effect of the spring 6, the pin 4 moves downward, and the bottom end of the pin 4 passes through the positioning groove 11 and penetrates the block 10, effectively performing a preliminary fixing treatment on the telescopic sleeve 8. The simple structure improves practicality. If the bolt 16 becomes loose, the stability of the frame will not be reduced.

[0024] Step 2: After the pin 4 is initially positioned, the bottom end of the bolt 16 passes through the first mounting hole 13 and the second mounting hole 15 and penetrates the first fixing block 12 and the second fixing block 14 respectively, thereby effectively fixing the first fixing block 12 and the second fixing block 14, so that the rotating member 1 and the telescopic sleeve 8 are fixed, thereby improving the installation strength, and the seat tube and the bicycle are conveniently installed through the mounting flange 17. By loosening the locking assembly 19, the telescopic rod 18 can slide inside the telescopic sleeve 8, thereby changing the length of the seat tube, and locking the locking assembly 19 after the length adjustment is completed.

[0025] Finally, it should be pointed out that the above embodiments are only representative examples of the present utility model. Obviously, the present utility model is not limited to the above embodiments, and there are many variations. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model should be considered to belong to the protection scope of the present utility model.

Claims

1. An aluminum alloy bicycle folding stem, comprising: The rotating member (1) is characterized in that: a mounting tube (2) is fixedly mounted on one side of the outer portion of the rotating member (1); an end cover (3) is fixedly mounted on one end of the mounting tube (2); a pin (4) is slidably mounted inside the mounting tube (2); a limit ring (5) is fixedly mounted outside the pin (4) and inside the mounting tube (2); a spring (6) is sleeved outside the pin (4) and between the limit ring (5) and the end cover (3); and one end of the pin (4) passes through the end cover (3). A handle (7) is fixedly installed, a card slot (9) is provided on one side of the outside of the rotating member (1) and located below the mounting tube (2), a telescopic sleeve (8) is rotatably installed on the outside of the rotating member (1) through a hinge, a card block (10) is fixedly installed on one end of the telescopic sleeve (8), the card block (10) is adapted to the card slot (9), a positioning groove (11) is provided on one side of the outside of the card block (10), and the other end of the pin (4) passes through the card block (10) through the positioning groove (11).

2. The aluminum alloy bicycle folding stem according to claim 1, characterized in that: A first fixing block (12) is welded to an outer side of the rotating member (1) and to both outer sides of the slot (9), and there are two first fixing blocks (12). A first mounting hole (13) is provided on an outer side of the two first fixing blocks (12).

3. The aluminum alloy bicycle folding stem according to claim 2, characterized in that: A second fixing block (14) is fixedly mounted on one end of the telescopic sleeve (8) and on both sides of the outside of the clamping block (10), and there are two second fixing blocks (14). A second mounting hole (15) is provided on one side of the outside of the two second fixing blocks (14).

4. The aluminum alloy bicycle folding stem according to claim 3, characterized in that: A bolt (16) is provided between the first fixing block (12) and the second fixing block (14), and a vertical center line of the first mounting hole (13) and a vertical center line of the second mounting hole (15) coincide with each other.

5. The aluminum alloy bicycle folding stem according to claim 4, characterized in that: The bottom end of the bolt (16) passes through the first mounting hole (13) and the second mounting hole (15) and penetrates the first fixing block (12) and the second fixing block (14) respectively, and one end of the rotating member (1) is welded to a mounting flange (17).

6. The aluminum alloy bicycle folding stem according to claim 5, characterized in that: A telescopic rod (18) is slidably mounted inside the telescopic sleeve (8), and a locking assembly (19) is provided at the other end of the telescopic sleeve (8).

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