Bottom frame suspension type folding bicycle

Abstract

The invention discloses a bottom frame suspension type folding bicycle, and relates to the technical field of folding bicycles, the bottom frame suspension type folding bicycle comprises frames, a cross rod, a first bottom frame, a second bottom frame and a suspension rod, the two sides of the suspension rod are provided with side fork mechanisms, detachable cloth frames are installed among the four frames, the bottoms of the two frames are each movably provided with a set of wheel seats, and the number of the set of wheel seats is two. A rotatable moving wheel is movably mounted in each wheel seat, an adjusting mechanism is arranged in each moving wheel, and a driving mechanism is further arranged in each moving wheel; the adjusting mechanism comprises an inner mounting seat and a moving block, the inner mounting seat is arranged in the moving wheel, the moving block is fixedly mounted in the moving wheel, a rectangular groove matched with the moving block is formed in the inner mounting seat, and the moving block is located in the inner mounting seat. Different tread widths can be adjusted according to different road surfaces, the trafficability of the moving wheels is improved, and the device can move more smoothly.

Description

Technical Field

[0001] The present invention relates to the technical field of folding bicycles, and in particular to a bottom frame suspended folding bicycle. Background Art

[0002] The existing camping car mainly consists of a body with wheels and a pull rod for people to tow. Users move the car by manually pulling the pull rod.

[0003] After searching the Chinese patent with publication number CN117681941A, an electric folding camper is disclosed. It includes: a folding body with wheels and a pull rod; a drive system and a power supply system, which are installed on the folding body; wherein the drive system has: a controller; a motor mechanism and a remote controller, the remote controller is detachably installed on the pull rod and is wirelessly connected to the controller; the folding body also has a mounting frame, and the controller, the power supply system and the pull rod are all installed on the mounting frame and integrated. Since the patent has a remote controller and a controller, and the remote controller and the controller are connected by wireless communication, there is no need to lay additional control wires between the remote controller and the controller, and the installation is convenient and quick; at the same time, the remote controller is detachably set on the pull rod, so that the user can remove the remote controller for use, which is more convenient for the user to control the folding body.

[0004] However, the above invention has the following disadvantages: Since camping is done outdoors, and some outdoor areas are unpaved, folding bikes need to move on these unpaved roads. The tire widths of existing folding bikes are fixed, and they can travel smoothly on normal roads. However, when moving on sandy or muddy ground, the contact area of ​​the fixed tire width is also fixed, which increases the pressure of the tire on the sandy or muddy ground, and easily causes the wheels to sink into the ground, resulting in poor passability. Summary of the invention

[0005] The object of the present invention is to provide a bottom frame suspension type folding bicycle to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: a bottom frame suspension type folding bicycle, comprising a frame, a cross bar, a first bottom frame, a second bottom frame and a suspension bar, side fork mechanisms are arranged on both sides of the suspension bar, a detachable cloth frame is installed between the four frames, a group of wheel seats are movably installed at the bottom of the two frames, a group of wheel seats has two, a rotatable moving wheel is movably installed inside each wheel seat, an adjustment mechanism is arranged inside the moving wheel, and a driving mechanism is also arranged inside the moving wheel; The regulatory agencies include: An inner mounting seat and a moving block, wherein the inner mounting seat is arranged inside the moving wheel, the moving block is fixedly installed inside the moving wheel, a rectangular groove matching the moving block is opened on the inner mounting seat, and the moving block is located inside the inner mounting seat; A cover plate, a first drive shaft and a first knob, wherein the cover plate is fixedly mounted on the inner mounting seat, the first drive shaft is movably mounted inside the inner mounting seat and is threadedly connected to the moving block, and the first knob is fixedly mounted on the first drive shaft; A plurality of extended wheel blocks, mounting rods and telescopic rods, wherein the plurality of extended wheel blocks are distributed in a ring shape inside the moving wheel, the plurality of mounting rods are fixedly mounted on the inner mounting seats, the telescopic rods are movably mounted inside the mounting rods, and the telescopic rods are fixedly connected to the extended wheel blocks.

[0007] Preferably, the driving mechanism includes a second driving shaft, a transmission bevel gear, a driving gear ring, a transmission gear, a transmission shaft and a second knob. A transmission groove is opened inside the inner mounting seat. The second driving shaft is a cylindrical structure with a thread. There are multiple second driving shafts. The multiple second driving shafts are movably mounted inside the multiple mounting rods, and the two ends of the second driving shaft are respectively located inside the transmission groove and the telescopic rod, the second driving shaft is threadedly connected to the telescopic rod, the transmission bevel gear is fixedly mounted on the bottom of the second driving shaft, the transmission bevel gear is located inside the transmission groove, the driving gear ring is movably mounted inside the transmission bevel gear, the driving gear ring and the multiple transmission bevel gears are meshed with each other, the driving gear ring is a double-sided gear ring, the transmission gear is movably mounted inside the transmission groove at a position corresponding to the driving gear ring, the transmission gear is threadedly connected to the driving gear ring, the transmission shaft is movably mounted inside the inner mounting seat and fixedly connected to the transmission gear, and the second knob is fixedly mounted on the transmission shaft.

[0008] Preferably, there are four frames in total, and the four frames are distributed in a rectangular shape. There are two cross bars in total, and the two cross bars are fixedly installed between two corresponding frames respectively. The first bottom frame is arranged on the left side below the four frames, and the second bottom frame is arranged on the right side below the four frames. The suspension rod is arranged at the intersection between the first bottom frame and the second bottom frame.

[0009] Preferably, a connecting rod is movably connected between the first bottom frame and the second bottom frame, the first bottom frame and the second bottom frame are movably connected through the connecting rod, and the positions where the first bottom frame and the second bottom frame are connected to the frame are also movably connected through the connecting rod, so that the frame, the first bottom frame and the second bottom frame can be folded at a certain angle to each other.

[0010] Preferably, the side fork mechanism includes two groups of connecting side rods, a first connecting shaft, a first folding rod, a second folding rod, a second connecting shaft, a sliding sleeve and a limit sleeve. There are two connecting side rods in a group, and the two groups of connecting side rods are cross-arranged on both sides of the top of the suspension rod. The first connecting shaft is a cylindrical structure, which is movably installed above the side wall of the suspension rod. The connecting side rod is movably sleeved on the first connecting shaft. There are two first folding rods in a group, and four of them are respectively arranged on four frames up and down. The first connecting shafts are also movably installed above the four frames, among which two first folding rods are movably sleeved on the two first connecting shafts. There are two second folding rods in a group, and the four second folding rods are respectively arranged on the four frames up and down, among which two second folding rods are movably sleeved on the other two first connecting shafts on the frame, and the other two first folding rods and the second folding rods are respectively movably connected to the connecting rods on the four frames.

[0011] Preferably, every two adjacent first folding rods and second folding rods are cross-arranged, the second connecting shaft is movably installed on the two ends of the two groups of connecting side rods, the four second folding rods and the four first folding rods are movably connected to the multiple second connecting shafts respectively, there are a plurality of sliding sleeves, the sliding sleeves are movably installed on the first folding rod, and the second folding rod corresponding to the first folding rod passes through the interior of the sliding sleeve, the limit sleeve is movably connected to the first folding rod, and the limit sleeve is movably installed with bolts through threads.

[0012] Preferably, a mounting shaft is fixedly installed on the top of the wheel seat, and the two mounting shafts on the left side vertically penetrate the upper and lower walls of the cross bar, the wheel seat is movably connected to the cross bar through the mounting shaft, a shock-absorbing spring is sleeved on the mounting shaft, and a mounting block is fixedly installed at a position corresponding to the wheel seat on the right cross bar, and the mounting shaft vertically penetrates the upper and lower walls of the mounting block and is movably connected to the mounting block.

[0013] Preferably, a force-applying mechanism is provided on the right cross bar, and the force-applying mechanism includes a main pull rod, a telescopic pull rod, a handle and a locking bolt. The main pull rod is movably mounted on the right cross bar, the telescopic pull rod is movably mounted inside the main pull rod and can move inside the main pull rod, the handle is fixedly mounted on the top of the telescopic pull rod, and the locking bolt is movably mounted on the side wall of the main pull rod through a thread, and the locking bolt passes through the inner and outer side walls of the main pull rod.

[0014] Preferably, the cross bar is fixedly mounted with a second knob of the flip seat, the interior of which is movably mounted with a flip shaft, and the main pull rod is movably sleeved on the flip shaft.

[0015] Preferably, a fixing rod is fixedly installed on the cross bar at a position corresponding to the flip axis, a clamping block is fixedly installed on the fixing rod, and the clamping block is elastic, and a smooth opening is provided on one side of the clamping block.

[0016] The present invention provides a bottom frame suspension folding bicycle through improvement, which has the following improvements and advantages compared with the prior art: First, the present invention sets a side fork mechanism. Since the frame, the first bottom frame and the second bottom frame are movably connected by connecting rods and can be folded with each other, the suspension rod can be moved upward, so that the first bottom frame and the second bottom frame will be folded downward, and the four frames will be close to each other. At the same time, the two sets of connecting side rods will also flip, and then drive the first folding rod and the second folding rod to flip, and the second folding rod moves inside the sliding sleeve. Finally, the side fork mechanism and the frame, the first bottom frame, the second bottom frame and the connecting side rods can be folded up, thereby reducing the volume and facilitating storage.

[0017] Second, the present invention is provided with a driving mechanism and an adjusting mechanism, which can adjust the tread width of the moving wheel. The first knob is rotated, and the first knob drives the first driving shaft to rotate. The first driving shaft is threadedly connected to the moving block, so that the inner mounting seat will move on the moving block, and the inner mounting seat can then drive multiple extended wheel blocks to move out from the inside of the moving wheel. Then the second knob can be rotated, and the second knob drives the transmission shaft to rotate, and the transmission shaft drives the transmission gear to rotate. The transmission gear and the driving gear ring are meshed and transmitted, and the driving gear ring is driven to rotate and drives multiple transmission bevel gears to rotate. The transmission bevel gear then drives the second driving shaft to rotate, and the second driving shaft is threadedly connected to the telescopic rod. The telescopic rod can then drive the multiple extended wheel blocks to move around, and due to the position The thread on the second drive shaft inside the telescopic rod connected to the outer extended wheel block is shorter, while the thread on the second drive shaft inside the other telescopic rods is longer, so that the several extended wheel blocks close to the outside will stop moving after a certain distance, while the extended wheel blocks located inside will continue to move. After squeezing, a circular ring structure compatible with the moving wheel can be formed between the multiple extended wheel blocks. At this time, the extended wheel block will be limited by the second drive shaft, and the telescopic rod will also limit the mounting rod, so that the position of the extended wheel block is fixed, and the extended wheel block will not fall off or loosen when it is hit, thereby achieving the ability to adjust different tread widths according to different road surfaces, increasing the passability of the moving wheel, and making the device move more smoothly.

[0018] Third: In the present invention, when the device moves on the ground, if the ground is uneven, the wheel seat will drive the mounting shaft to move upward, and at the same time squeeze the shock-absorbing spring, so that each moving wheel can achieve the effect of individual shock absorption during movement, thereby avoiding the situation where objects fall due to bumps when pulling objects. At the same time, the two moving wheels on the left are connected to the cross bar through the mounting block, so that the moving wheels can rotate inside the mounting block with the mounting shaft as the base point, achieving the effect of universal movement.

[0019] Fourthly: In the present invention, the entire device can be moved by pulling the handle, the locking bolt is movably installed on the side wall of the main pull rod through a thread, the locking bolt passes through the inner and outer side walls of the main pull rod, the telescopic pull rod can move inside the main pull rod, and then the length between the main pull rod and the telescopic pull rod can be adjusted, and then the locking bolt can be rotated to fix the length of the main pull rod and the telescopic pull rod, thereby achieving the effect of facilitating pulling the device while adjusting the appropriate length according to the needs of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic diagram of the structure of the side fork mechanism in the present invention; Figure 4 It is a schematic diagram of the overall structure of the present invention in a folded state; Figure 5 It is a schematic diagram of the structure of the moving wheel in the present invention; Figure 6 It is a cross-sectional view of the internal structure of the moving wheel in the present invention; Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle; Figure 8 For the present invention Figure 2 Enlarged view of point B in the middle; Fig. 9 For the present invention Figure 2 Enlarged view of point C in the middle; Fig.10 This is a schematic diagram of storing the extended wheel block in the present invention; Fig.11 It is a schematic diagram of the driving mechanism structure in the present invention.

[0022] Reference numerals: 1. Frame; 2. Crossbar; 3. First bottom frame; 4. Second bottom frame; 5. Suspension rod; 6. Connecting side rod; 7. First connecting shaft; 8. First folding rod; 9. Second folding rod; 10. Second connecting shaft; 11. Sliding sleeve; 12. Limiting sleeve; 13. Fabric frame; 14. Moving wheel; 15. Wheel seat; 16. Inner mounting seat; 17. Moving block; 18. Cover plate; 19. First driving shaft; 20. First knob; 21. Extending wheel block; 22. Mounting rod; 23, telescopic rod; 24, transmission slot; 25, second drive shaft; 26, transmission bevel gear; 27, driving gear ring; 28, transmission gear; 29, transmission shaft; 30, second knob; 31, mounting shaft; 32, shock-absorbing spring; 33, mounting block; 34, connecting rod; 35, main pull rod; 36, telescopic pull rod; 37, handle; 38, locking bolt; 39, flip seat; 40, flip shaft; 41, fixing rod; 42, clamping block. DETAILED DESCRIPTION

[0023] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] The present invention provides a bottom frame suspension folding bicycle through improvement. The technical solution of the present invention is: like Figure 1 , Figure 2 as well as Figure 8As shown, an embodiment of the present invention provides a bottom frame suspension folding bicycle, including a frame 1, a cross bar 2, a first bottom frame 3, a second bottom frame 4 and a suspension bar 5. There are four frames 1 in total, and the four frames 1 are distributed in a rectangular shape. There are two cross bars 2 in total, and the two cross bars 2 are fixedly installed at the lower position between two corresponding frames 1, respectively. The first bottom frame 3 is arranged on the left side below the four frames 1, and the second bottom frame 4 is arranged on the right side below the four frames. A connecting rod 34 is movably connected between the first bottom frame 3 and the second bottom frame 4, and the first bottom frame 3 and the second bottom frame 4 are movably connected through the connecting rod 34, and the position where the first bottom frame 3 and the second bottom frame 4 are connected to the frame 1 is also movably connected through the connecting rod 34. The frame 1, the first bottom frame 3 and the second bottom frame 4 are folded at a certain angle to each other. The suspension rod 5 is a "C"-shaped structure with an upward opening. The suspension rod 5 is arranged at the intersection between the first bottom frame 3 and the second bottom frame 4. Side fork mechanisms are arranged on both sides of the suspension rod 5. A detachable cloth frame 13 is installed between the four frames 1. The cloth frame 13 is used to place articles. A group of wheel seats 15 are movably installed at the bottom of the two frames 1. There are two wheel seats 15 in a group. A rotatable moving wheel 14 is movably installed inside each wheel seat 15. The moving wheel 14 is a hollow cylindrical structure. The moving wheel 14 is used to move the device. An adjustment mechanism is arranged inside the moving wheel 14. like Figures 5 to 7 As shown, the adjustment mechanism includes an inner mounting seat 16, a moving block 17, a cover plate 18, a first drive shaft 19, a first knob 20, an extension wheel block 21, a mounting rod 22 and a telescopic rod 23. The inner mounting seat 16 is a cylindrical structure, and the inner mounting seat 16 is arranged inside the moving wheel 14. The moving block 17 is a block of a rectangular structure, and the moving block 17 is fixedly installed inside the moving wheel 14. A rectangular groove matching the moving block 17 is opened on the inner mounting seat 16, and the moving block 17 is located inside the inner mounting seat 16. The cover plate 18 is a circular plate, and the cover plate 18 is fixedly installed on the inner mounting seat 16. The first drive shaft 19 is a cylindrical structure with a thread, and the first drive shaft 19 is movably installed inside the inner mounting seat 16. The first drive shaft 19 is provided with a first knob 20 fixedly mounted on the first drive shaft 19, and the extension wheel block 21 is an arc-shaped block. The extension wheel block 21 is provided with a rubber block matching the pattern of the moving wheel 14. There are a plurality of extension wheel blocks 21, and the plurality of extension wheel blocks 21 are distributed in a ring shape inside the moving wheel 14. There are a plurality of mounting rods 22, and the mounting rods 22 are hollow cylindrical structures. The mounting rods 22 are fixedly mounted on the inner mounting seat 16. The telescopic rod 23 is a cylindrical structure. The telescopic rod 23 is movably mounted inside the mounting rod 22, and the telescopic rod 23 is fixedly connected to the extension wheel block 21. A driving mechanism is also provided inside the moving wheel 14. The driving mechanism includes a second driving shaft 25, a transmission bevel gear 26, a driving gear ring 27, a transmission gear 28, a transmission shaft 29 and a second knob 30. A transmission groove 24 is provided inside the inner mounting seat 16. The transmission groove 24 is a circular groove. The second driving shaft 25 is a cylindrical structure with threads. There are a plurality of second driving shafts 25. The plurality of second driving shafts 25 are movably mounted inside the plurality of mounting rods 22, and the two ends of the second driving shaft 25 are respectively located inside the transmission groove 24 and the telescopic rod 23. The thread on the second driving shaft 25 inside the telescopic rod 23 connected to the outer extension wheel block 21 is shorter, while the thread on the second driving shaft 25 inside the other telescopic rods 23 is longer. The second driving shaft 25 is threadedly connected to the telescopic rod 23. Then, the transmission bevel gear 26 is fixedly installed at the bottom of the second driving shaft 25, the transmission bevel gear 26 is located inside the transmission groove 24, the driving gear ring 27 is a circular ring structure, the driving gear ring 27 is movably installed inside the transmission bevel gear 26, the driving gear ring 27 and multiple transmission bevel gears 26 are meshed with each other, the driving gear ring 27 is a double-sided gear ring, the transmission gear 28 is movably installed inside the transmission groove 24 at a position corresponding to the driving gear ring 27, the transmission gear 28 is threadedly connected with the driving gear ring 27, the transmission shaft 29 is a cylindrical structure, the transmission shaft 29 is movably installed inside the inner mounting seat 16 and fixedly connected to the transmission gear 28, the second knob 30 is fixedly installed on the transmission shaft 29, and the movable wheel can be adjusted by setting the driving mechanism and the adjusting mechanism. The tread width of 14 is adjusted by rotating the first knob 20, the first knob 20 drives the first drive shaft 19 to rotate, the first drive shaft 19 is threadedly connected to the moving block 17, so that the inner mounting seat 16 moves on the moving block 17, and the inner mounting seat 16 can then drive the plurality of extended wheel blocks 21 to move out from the inside of the moving wheel 14, and then the second knob 30 can be rotated, the second knob 30 drives the transmission shaft 29 to rotate, the transmission shaft 29 drives the transmission gear 28 to rotate, the transmission gear 28 and the driving gear ring 27 are meshed and transmitted, the driving gear ring 27 is driven to rotate and drives the plurality of transmission bevel gears 26 to rotate, the transmission bevel gear 26 then drives the second drive shaft 25 to rotate, the second drive shaft 25 is threadedly connected to the telescopic rod 23, the telescopic rod 23 This can drive multiple extended wheel blocks 21 to move in all directions. Since the thread on the second drive shaft 25 inside the telescopic rod 23 connected to the extended wheel block 21 on the outside is shorter, while the thread on the second drive shaft 25 inside the other telescopic rods 23 is longer, the several extended wheel blocks 21 close to the outside will stop moving after a certain distance, while the extended wheel block 21 located inside will continue to move. After being squeezed, a circular ring structure that is compatible with the moving wheel 14 can be formed between the multiple extended wheel blocks 21, thereby increasing the tread width of the moving wheel 14. At this time, the extended wheel block 21 will be limited by the second drive shaft 25, and the telescopic rod 23 will also limit the mounting rod 22, thereby fixing the position of the extended wheel block 21.When the extension wheel block 21 is hit, it will not fall off or become loose.

[0025] like Figure 3 as well as Figure 4 As shown, the side fork mechanism includes two groups of connecting side rods 6, a first connecting shaft 7, a first folding rod 8, a second folding rod 9, a second connecting shaft 10, a sliding sleeve 11 and a limiting sleeve 12. There are two connecting side rods 6 in a group, and the two groups of connecting side rods 6 are cross-arranged on both sides of the top of the suspension rod 5. The first connecting shaft 7 is a cylindrical structure, and the first connecting shaft 7 is movably installed above the side wall of the suspension rod 5. The connecting side rod 6 is movably sleeved on the first connecting shaft 7. There are two first folding rods 8 in a group, and four of them are respectively arranged on four frames 1 up and down. A first connecting shaft 7 is also movably installed on the top, wherein two first folding rods 8 are movably sleeved on the two first connecting shafts 7, a group of second folding rods 9 has two in total, and four second folding rods 9 are respectively arranged on four frames 1 up and down, wherein two second folding rods 9 are movably sleeved on the other two first connecting shafts 7 on the frame 1, and the other two first folding rods 8 and the second folding rods 9 are respectively movably connected to the connecting rods 34 on the four frames 1, and every two adjacent first folding rods 8 and second folding rods 9 are cross-arranged, and the second connecting shaft 10 is movably installed At both ends of the two sets of connecting side rods 6, four second folding rods 9 and four first folding rods 8 are movably connected with multiple second connecting shafts 10 respectively, the sliding sleeve 11 is a hollow structure, there are multiple sliding sleeves 11, the sliding sleeve 11 is movably installed on the first folding rod 8, and the second folding rod 9 corresponding to the first folding rod 8 passes through the inside of the sliding sleeve 11, the limiting sleeve 12 is a hollow structure, the limiting sleeve 12 is movably sleeved on the first folding rod 8, and the limiting sleeve 12 is movably installed with bolts through threads. Through the setting of the side fork mechanism, due to the frame 1 and the first bottom frame 3 The first and second bottom frames 4 are movably connected via a connecting rod 34 and can be folded with each other. The suspension rod 5 can be moved upward, so that the first bottom frame 3 and the second bottom frame 4 will be folded downward, and the four frames 1 will be close to each other. At the same time, the two sets of connecting side rods 6 will also flip over, and then drive the first folding rod 8 and the second folding rod 9 to flip over, and the second folding rod 9 moves inside the sliding sleeve 11. Finally, the side fork mechanism and the frame 1, the first bottom frame 3, the second bottom frame 4 and the connecting side rods 6 can be folded up, reducing the volume and making it easier to store.

[0026] like Figure 2 , Figure 5 as well as Figure 8As shown, a mounting shaft 31 is fixedly installed on the top of the wheel seat 15, and the mounting shaft 31 is a cylindrical structure. The two mounting shafts 31 on the left side penetrate the upper and lower walls of the cross bar 2 upwardly, and the wheel seat 15 is movably connected with the cross bar 2 through the mounting shaft 31. A shock-absorbing spring 32 is sleeved on the mounting shaft 31. A mounting block 33 is fixedly installed at the position corresponding to the wheel seat 15 on the right cross bar 2. The mounting block 33 is a cylindrical structure. The mounting shaft 31 penetrates the upper and lower walls of the mounting block 33 upwardly and is movably connected to the mounting block 33. With the arrangement of 32, when the device moves on the ground, if the ground is uneven, the wheel seat 15 will drive the mounting shaft 31 to move upward, and at the same time squeeze the shock-absorbing spring 32, so that each moving wheel 14 can achieve the effect of individual shock absorption during movement, thereby avoiding the situation where objects fall due to bumps when pulling objects. At the same time, the two moving wheels 14 on the left are connected to the cross bar 2 through the mounting block 33, so that the moving wheel 14 can rotate inside the mounting block 33 with the mounting shaft 31 as the base point, achieving the effect of universal movement.

[0027] like Figure 1 , Figure 2 as well as Fig. 9 As shown, a force-applying mechanism is provided on the right cross bar 2, and the force-applying mechanism includes a main pull rod 35, a telescopic pull rod 36, a handle 37 and a locking bolt 38. The main pull rod 35 is a hollow long strip structure, and the main pull rod 35 is movably mounted on the right cross bar 2, and the telescopic pull rod 36 is movably mounted inside the main pull rod 35 and can move inside the main pull rod 35, and the handle 37 is fixedly mounted on the top of the telescopic pull rod 36, and the entire device can be pulled to move by the handle 37, and the locking bolt 38 is movably mounted on the side wall of the main pull rod 35 by means of a thread, and the locking bolt 38 penetrates the inner and outer side walls of the main pull rod 35, and the telescopic pull rod 36 can move inside the main pull rod 35, and then the length between the main pull rod 35 and the telescopic pull rod 36 can be adjusted, and then the locking bolt 38 can be rotated to fix the length of the main pull rod 35 and the telescopic pull rod 36, thereby achieving the effect of facilitating the pulling of the device while adjusting the appropriate length according to the needs of the user.

[0028] A flip seat 39 is fixedly installed on the cross bar 2, and the flip seat 39 is a hollow rectangular structure. A flip shaft 40 is movably installed inside the second knob 30, and the flip shaft 40 is a cylindrical structure. The main pull rod 35 is movably sleeved on the flip shaft 40, so that the main pull rod 35 can rotate around the flip shaft 40, and then the force angle that best suits the user can be adjusted. A fixed rod 41 is fixedly installed at the position corresponding to the flip shaft 40 on the cross bar 2, and a clamping block 42 is fixedly installed on the fixed rod 41. The clamping block 42 is a hollow structure, and the clamping block 42 is elastic. A smooth opening is provided on one side of the clamping block 42. Through the setting of the clamping block 42, when the device is folded, the main pull rod 35 can be inserted into the inside of the clamping block 42, thereby limiting the main pull rod 35 to prevent the main pull rod 35 from falling off when folded.

[0029] Specific implementation steps: through the setting of the side fork mechanism, since the frame 1, the first bottom frame 3 and the second bottom frame 4 are movably connected through the connecting rod 34 and can be folded with each other, the suspension rod 5 can be moved upward, so that the first bottom frame 3 and the second bottom frame 4 will be folded downward, and the four frames 1 will be close to each other. At the same time, the two sets of connecting side rods 6 will also turn over, and then drive the first folding rod 8 and the second folding rod 9 to turn over, and the second folding rod 9 moves inside the sliding sleeve 11. Finally, the side fork mechanism and the frame 1, the first bottom frame 3, the second bottom frame 4 and the connecting side rods 6 can be folded up, reducing the volume, so as to facilitate storage; At the same time, a driving mechanism and an adjusting mechanism are provided to adjust the tread width of the moving wheel 14. The first knob 20 is rotated, and the first knob 20 drives the first driving shaft 19 to rotate. The first driving shaft 19 is threadedly connected to the moving block 17, so that the inner mounting seat 16 will move on the moving block 17, and the inner mounting seat 16 can then drive the multiple extended wheel blocks 21 to move out from the inside of the moving wheel 14. Then the second knob 30 can be rotated, and the second knob 30 drives the transmission shaft 29 to rotate, and the transmission shaft 29 drives the transmission gear 28 to rotate. The transmission gear 28 and the driving gear ring 27 are meshed and transmitted, and the driving gear ring 27 is driven to rotate and drive multiple transmission bevel gears 26 to rotate. The transmission bevel gear 26 then drives the second driving shaft 25 to rotate, and the second driving shaft 25 is threadedly connected to the telescopic rod 23. The telescopic rod 23 can then drive the multiple extended wheel blocks 21 to move toward the surroundings. The extension wheel block 21 is moved, and because the thread on the second drive shaft 25 inside the telescopic rod 23 connected to the outer extension wheel block 21 is shorter, and the thread on the second drive shaft 25 inside the other telescopic rods 23 is longer, the extension wheel blocks 21 close to the outside will stop moving after a certain distance, while the extension wheel block 21 located inside will continue to move, and a circular ring structure compatible with the moving wheel 14 can be formed between the multiple extension wheel blocks 21 through extrusion. At this time, the extension wheel block 21 will be limited by the second drive shaft 25, and the telescopic rod 23 will also limit the mounting rod 22, so that the position of the extension wheel block 21 is fixed, and the extension wheel block 21 will not fall off or loosen when it is hit, thereby achieving the effect of adjusting different tread widths according to different road surfaces, increasing the passability of the moving wheel 14, and making the device move more smoothly.

[0030] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A folding bicycle with a bottom frame suspension, comprising a frame (1), a cross bar (2), a first bottom frame (3), a second bottom frame (4) and a suspension rod (5), characterized in that: Side fork mechanisms are provided on both sides of the suspension rod (5); a detachable cloth frame (13) is installed between the four frames (1); a group of wheel seats (15) are movably installed at the bottom of the two frames (1); a group of wheel seats (15) has two; a rotatable moving wheel (14) is movably installed inside each wheel seat (15); an adjustment mechanism is provided inside the moving wheel (14); and a driving mechanism is also provided inside the moving wheel (14); The regulatory agencies include: An inner mounting seat (16) and a moving block (17), wherein the inner mounting seat (16) is arranged inside the moving wheel (14), the moving block (17) is fixedly mounted inside the moving wheel (14), a rectangular groove matching the moving block (17) is formed on the inner mounting seat (16), and the moving block (17) is located inside the inner mounting seat (16); A cover plate (18), a first drive shaft (19) and a first knob (20), wherein the cover plate (18) is fixedly mounted on the inner mounting seat (16), the first drive shaft (19) is movably mounted inside the inner mounting seat (16) and is threadedly connected to the moving block (17), and the first knob (20) is fixedly mounted on the first drive shaft (19); A plurality of extended wheel blocks (21), mounting rods (22) and telescopic rods (23); the plurality of extended wheel blocks (21) are distributed in a ring shape inside the moving wheel (14); the plurality of mounting rods (22) are fixedly mounted on the inner mounting seat (16); the telescopic rods (23) are movably mounted inside the mounting rods (22); and the telescopic rods (23) are fixedly connected to the extended wheel blocks (21).

2. A bottom frame suspension folding bicycle according to claim 1, characterized in that: The driving mechanism comprises a second driving shaft (25), a transmission bevel gear (26), a driving gear ring (27), a transmission gear (28), a transmission shaft (29) and a second knob (30). A transmission groove (24) is provided inside the inner mounting seat (16). The second driving shaft (25) is a cylindrical structure with threads. There are a plurality of second driving shafts (25). The plurality of second driving shafts (25) are movably mounted inside a plurality of mounting rods (22), and the two ends of the second driving shaft (25) are respectively located inside the transmission groove (24) and the telescopic rod (23). The second driving shaft (25) is threadedly connected to the telescopic rod (23). The transmission bevel gear (26) is fixedly mounted on the mounting rods (22). The transmission bevel gear (26) is mounted at the bottom of the second drive shaft (25), the transmission bevel gear (26) is located inside the transmission groove (24), the driving gear ring (27) is movably mounted inside the transmission bevel gear (26), the driving gear ring (27) and the plurality of transmission bevel gears (26) are meshed with each other, the driving gear ring (27) is a double-sided gear ring, the transmission gear (28) is movably mounted inside the transmission groove (24) at a position corresponding to the driving gear ring (27), the transmission gear (28) and the driving gear ring (27) are threadedly connected, the transmission shaft (29) is movably mounted inside the inner mounting seat (16) and is fixedly connected to the transmission gear (28), and the second knob (30) is fixedly mounted on the transmission shaft (29).

3. The bottom frame suspension folding bicycle according to claim 1, characterized in that: There are four frames (1) in total, and the four frames (1) are arranged in a rectangular shape. There are two cross bars (2) in total, and the two cross bars (2) are respectively fixedly installed between two corresponding frames (1). The first bottom frame (3) is arranged on the left side below the four frames (1), and the second bottom frame (4) is arranged on the right side below the four frames. The suspension rod (5) is arranged at the intersection between the first bottom frame (3) and the second bottom frame (4).

4. The bottom frame suspension folding vehicle according to claim 3, characterized in that: A connecting rod (34) is movably connected between the first bottom frame (3) and the second bottom frame (4); the first bottom frame (3) and the second bottom frame (4) are movably connected via the connecting rod (34); and the positions where the first bottom frame (3) and the second bottom frame (4) are connected to the frame (1) are also movably connected via the connecting rod (34), so that the frame (1), the first bottom frame (3) and the second bottom frame (4) can be folded relative to each other at a certain angle.

5. The bottom frame suspension folding vehicle according to claim 1, characterized in that: The side fork mechanism comprises two groups of connecting side rods (6), a first connecting shaft (7), a first folding rod (8), a second folding rod (9), a second connecting shaft (10), a sliding sleeve (11) and a limiting sleeve (12), wherein one group of connecting side rods (6) comprises two connecting side rods, and the two groups of connecting side rods (6) are respectively arranged crosswise on both sides of the top of the suspension rod (5), the first connecting shaft (7) is a cylindrical structure, the first connecting shaft (7) is movably mounted above the side wall of the suspension rod (5), the connecting side rod (6) is movably sleeved on the first connecting shaft (7), the one group of first folding rods (8) comprises two connecting side rods, and the four connecting side rods (6) are arranged crosswise on the top of the suspension rod (5), the first connecting shaft (7) is a cylindrical structure, the first connecting shaft (7) is movably mounted above the side wall of the suspension rod (5), the connecting side rod (6) is movably sleeved on the first connecting shaft (7), the first folding rods (8) comprise two connecting side rods, and the four connecting side rods (6) are arranged crosswise on the top of the suspension rod (5), and the first connecting shaft (7) is movably sleeved on the first connecting shaft (7). The four frames (1) are respectively arranged on the upper and lower parts, and the first connecting shafts (7) are also movably installed on the upper parts of the four frames (1), wherein two first folding rods (8) are movably sleeved on the two first connecting shafts (7), and a group of second folding rods (9) has two in total, and the four second folding rods (9) are respectively arranged on the upper and lower parts of the four frames (1), wherein two second folding rods (9) are movably sleeved on the other two first connecting shafts (7) on the frames (1), and the other two first folding rods (8) and the second folding rods (9) are respectively movably connected to the connecting rods (34) on the four frames (1).

6. The bottom frame suspension folding vehicle according to claim 5, characterized in that: Every two adjacent first folding rods (8) and second folding rods (9) are cross-arranged, a second connecting shaft (10) is movably mounted on both ends of the two groups of connecting side rods (6), four second folding rods (9) and four first folding rods (8) are movably connected to a plurality of second connecting shafts (10), a plurality of sliding sleeves (11) are provided, the sliding sleeves (11) are movably mounted on the first folding rod (8), and a second folding rod (9) corresponding to the first folding rod (8) passes through the interior of the sliding sleeve (11), a limiting sleeve (12) is movably sleeved on the first folding rod (8), and a bolt is movably mounted on the limiting sleeve (12) through a thread.

7. The bottom frame suspension folding vehicle according to claim 1, characterized in that: A mounting shaft (31) is fixedly mounted on the top of the wheel seat (15), and two mounting shafts (31) on the left side penetrate the upper and lower wall surfaces of the cross bar (2) upwardly. The wheel seat (15) is movably connected to the cross bar (2) via the mounting shafts (31), and a shock absorbing spring (32) is sleeved on the mounting shafts (31). A mounting block (33) is fixedly mounted on the right cross bar (2) at a position corresponding to the wheel seat (15), and the mounting shaft (31) penetrates the upper and lower wall surfaces of the mounting block (33) upwardly and is movably connected to the mounting block (33).

8. The bottom frame suspension folding vehicle according to claim 1, characterized in that: A force-applying mechanism is provided on the right cross bar (2), and the force-applying mechanism includes a main pull rod (35), a telescopic pull rod (36), a handle (37) and a locking bolt (38). The main pull rod (35) is movably mounted on the right cross bar (2), the telescopic pull rod (36) is movably mounted inside the main pull rod (35) and can move inside the main pull rod (35), the handle (37) is fixedly mounted on the top of the telescopic pull rod (36), and the locking bolt (38) is movably mounted on the side wall of the main pull rod (35) through a thread, and the locking bolt (38) passes through the inner and outer side walls of the main pull rod (35).

9. The bottom frame suspension folding vehicle according to claim 8, characterized in that: A turning seat (39) is fixedly mounted on the crossbar (2), a turning shaft (40) is movably mounted inside the second knob (30), and the main pull rod (35) is movably sleeved on the turning shaft (40).

10. The bottom frame suspended folding vehicle according to claim 9, characterized in that: A fixing rod (41) is fixedly mounted on the crossbar (2) at a position corresponding to the flip axis (40), and a clamping block (42) is fixedly mounted on the fixing rod (41). The clamping block (42) is elastic, and a smooth opening is provided on one side of the clamping block (42).

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