Bicycle with adjustable handlebar

Abstract

The invention relates to the technical field of bicycles, in particular to a handlebar-adjustable bicycle which comprises a bicycle body, the bicycle body comprises a front connecting cylinder located at the front end of the bicycle body, a front axle frame and a handlebar, the front axle frame is rotationally connected to the bottom of the front connecting cylinder, and a front wheel is rotationally arranged on the inner side of the bottom of the front axle frame. The transmission adjusting part comprises a follow-up steering transmission structure; the device further comprises a front-back adjusting mechanism. And the up-down adjusting mechanism is installed on the transmission adjusting part, and the handlebar is installed on the up-down adjusting mechanism. Through the structural design of the transmission adjusting part and the up-down adjusting mechanism, front-back adjustment and up-down adjustment of the handlebar can be achieved so as to meet the riding requirements of people with different heights and arm lengths, a rider can conveniently find a comfortable handle holding position, the fatigue degree during long-time riding is reduced, and the riding comfort of the rider is improved. The practicability and adaptability are greatly improved, meanwhile, the bicycle can adapt to wider age groups, and therefore the market competitiveness is improved.

Description

Technical Field

[0001] This application relates to the field of bicycle technology, and in particular to a bicycle with adjustable handlebars. Background Technology

[0002] A bicycle is a small land vehicle propelled by human pedaling. It can be used as a common and environmentally friendly means of transportation for daily commutes and outings, as well as as fitness equipment for cycling and cycling tours. It is also a competitive sport, with events such as road cycling, mountain biking, track cycling, and stunt cycling.

[0003] As a relatively flexible means of transportation, bicycles are generally flexible in their components. However, most bicycles on the market today have fixed handlebars, which are rarely adjustable to accommodate different user body shapes and lever arms. Therefore, their flexibility is relatively poor compared to other parts of the bicycle. On the other hand, a child's growth process may begin with children's bicycles in childhood. As they grow older, their bodies grow larger, their height increases, and their legs and arms lengthen until adulthood. During this process, their needs for bicycles will be different.

[0004] Currently, the bicycle market typically only adjusts the height of the saddle for the rider's legs, neglecting factors such as height and arm span. This means that while taller riders can raise the saddle, they need to lean forward and bend down to grip the handlebars; shorter riders with shorter arm spans can lower the saddle, but due to insufficient arm length, they may need to lift their buttocks off the saddle to grip the handlebars. At the same time, people usually prefer to raise the saddle slightly to allow for full leg extension and reduce fatigue while riding. This makes it difficult for riders in either of these situations to find a comfortable grip position and method for long rides.

[0005] Based on this, those skilled in the art have proposed a bicycle with adjustable handlebars, providing a new solution to the aforementioned technical problems. Summary of the Invention

[0006] In order to solve the problem that the handlebars of bicycles in the prior art are usually not adjustable as mentioned in the background art, this application provides a bicycle with adjustable handlebars.

[0007] The bicycle with adjustable handlebars provided in this application adopts the following technical solution: A handlebar-adjustable bicycle comprises a bicycle body, the bicycle body comprising a front connecting cylinder at the front end of the bicycle body, a front bridge frame and a handlebar, the front bridge frame being rotationally connected at the bottom of the front connecting cylinder and having a front wheel rotationally connected at the inner side of the bottom of the front bridge frame, a transmission adjustment part being arranged on the front connecting cylinder, the transmission adjustment part comprising a follow-up steering transmission structure for transmitting the rotation of the handlebar at different positions to the front bridge frame to drive the rotation of the front bridge frame, and a front-rear adjustment mechanism for adjusting the front-rear position of the handlebar. An up-down adjustment mechanism is mounted on the transmission adjustment part, the handlebar is mounted on the up-down adjustment mechanism, and the up-down adjustment mechanism is used for adjusting the position of the handlebar in the vertical direction.

[0008] By adopting the above technical scheme, the front-rear adjustment and up-down adjustment of the handlebar can be realized to adapt to the riding requirements of people with different heights and arm lengths, the riding personnel can easily find a more comfortable handlebar position, the fatigue degree during long-time riding is reduced, the practicability and adaptability are greatly improved, the age range adapted by the bicycle is wider, and the market competitiveness is improved.

[0009] Optionally, the up-down adjustment mechanism comprises a connecting outer cylinder, the handlebar is fixed at the top of the outer side of the connecting outer cylinder, an outer connecting cylinder is arranged at the inner side of the connecting outer cylinder, a screw rod 2 is rotationally connected at the inner side of the top of the connecting outer cylinder, a threaded connection groove matched with the screw rod 2 and an adjustment cavity arranged below the threaded connection groove are arranged at the inner side of the outer connecting cylinder, the screw rod 2 passes through the threaded connection groove and extends into the inner side of the adjustment cavity, the screw rod 2 is threadedly connected with the outer connecting cylinder through the threaded connection groove, an adjustment knob is rotationally connected at the top of the connecting outer cylinder, and the top of the screw rod 2 is fixedly connected with the adjustment knob. By adopting the above technical scheme, the height position of the handlebar can be adjusted through the design of the adjustment knob, the riding requirements of people with different heights and arm lengths can be flexibly adapted, and the adaptability is improved.

[0010] Optionally, a support connecting block is rotationally connected at the outer side of the bottom of the screw rod 2, and the support connecting block is slidingly connected at the inner side of the adjustment cavity. By adopting the above technical scheme, the rotation adjustment of the screw rod 2 is more stable, the screw rod 2 is supported at the inner side of the adjustment cavity, and the service life of the screw rod 2 is improved.

[0011] Optionally, a plurality of guide strips 2 are arranged at the outer periphery of the outer connecting cylinder, a plurality of guide grooves 2 matched with the guide strips 2 are arranged at the inner side of the connecting outer cylinder, and the connecting outer cylinder is slidingly connected at the outer side of the outer connecting cylinder through the cooperation of the guide grooves 2 and the corresponding guide strips 2. By adopting the above technical scheme, the outer connecting cylinder can be driven to rotate by the connection outer cylinder, and the connection outer cylinder and the outer connecting cylinder can be relatively slidably connected, so that the rotation transmission and height adjustment of the handlebar can be simultaneously satisfied.

[0012] Optionally, the transmission adjustment part comprises a mounting frame arranged along the length direction of the front connecting cylinder, an activity cavity is formed in the inner side of the mounting frame, a connecting sleeve matched with the front connecting cylinder is arranged at the end of the mounting frame close to the front connecting cylinder, the connecting sleeve is fixedly sleeved on the outer side of the front connecting cylinder, an adjustment base is slidably connected in the activity cavity, a bearing two is arranged on the outer side of the bottom of the outer connecting cylinder, an bearing mounting hole is formed in the inner top of the adjustment base, and the bearing two is arranged in the bearing mounting hole. By adopting the above technical scheme, the up-down adjustment mechanism is mounted on the adjustment base, and the adjustment base slides in the mounting frame, so that the front and rear positions of the handlebar can be adjusted.

[0013] Optionally, an installation cavity is formed in the inner side of the adjustment base, the follow-up steering transmission structure comprises a driving bevel gear fixedly arranged on the bottom of the outer connecting cylinder and located in the installation cavity, a transmission bevel gear one is meshingly connected to one end of the driving bevel gear, the transmission bevel gear one is rotatably connected to the adjustment base and located in the installation cavity, a guide transmission bar is connected to the inner side of the transmission bevel gear one, the guide transmission bar is rotatably connected to the inner side of the mounting frame, one end of the guide transmission bar extends into the inner side of the front connecting cylinder and is fixedly connected with a transmission bevel gear two, a transmission bevel gear three is meshingly connected to the bottom of the transmission bevel gear two, a connecting shaft is fixedly arranged on the top of the front bridge, the transmission bevel gear three is fixedly connected to the top of the connecting shaft, a bearing one is arranged on the outer top of the connecting shaft, and the connecting shaft is rotatably connected to the front connecting cylinder through the bearing one. By adopting the above technical scheme, when the adjustment base is located at any position in the activity cavity, the rotation of the handlebar can be transmitted to the rotation of the front bridge, so that the adjustment of the front and rear positions of the handlebar does not affect the steering function of the front wheel.

[0014] Optionally, a rotating support block is rotatably connected to the inner side of one end of the adjustment base away from the transmission bevel gear one, the transmission rod is inserted into the inner side of the rotating support block and the transmission bevel gear one, a plurality of guide transmission bars are arranged on the outer periphery of the transmission rod, guide transmission grooves matched with the guide transmission bars are formed in the inner side of the rotating support block and the transmission bevel gear one, and the transmission rod is slidably connected to the rotating support block and the transmission bevel gear one through the cooperation of the guide transmission bars and the guide transmission grooves. By adopting the above technical scheme, the displacement movement of the adjustment base is more stable.

[0015] Optionally, the front and rear adjusting mechanism comprises a screw rod I threadedly connected to the inner side of the bottom of the adjusting base, the screw rod I is threadedly connected to the inner side of the mounting frame, the mounting frame is provided with a support tube away from the one end of the connecting sleeve I, the two ends of the support tube are fixed on the mounting frame and the vehicle body respectively, the one end of the screw rod I close to the support tube extends out of the mounting frame and is fixed with a transmission gear, the top of the transmission gear is engagedly connected with a driving gear, the driving gear is rotatably connected to the outer side of the support tube, the outer sides of the transmission gear and the driving gear are provided with a mounting box, the mounting box is fixed on the mounting frame, the adjusting sleeve is rotatably connected to the outer side of the support tube away from the mounting frame, one end of the adjusting sleeve extends into the inner side of the mounting box and is fixedly connected with the driving gear; The two sides of the movable cavity are fixedly provided with guide strips I, the two sides of the adjusting base are provided with guide grooves I matched with the guide strips I, and the adjusting base is slidably connected to the inner side of the mounting frame through cooperation of the guide grooves I and the guide strips I. By adopting the above technical scheme, the position of the adjusting base along the length direction of the mounting frame can be continuously adjusted to adapt to the riding requirements of people with different heights and arm lengths, and the adaptability is improved.

[0016] Optionally, folding protective covers are arranged on the top of the movable cavity and located on the two sides of the adjusting base, the two ends of the folding protective covers are connected to the adjusting base and the mounting frame respectively, and an avoiding groove is arranged on the top of the mounting frame and located at the one end of the mounting frame close to the connecting sleeve I. By adopting the above technical scheme, the protection effect of the parts on the inner side of the mounting frame can be achieved to some extent, and the service life of the inner side parts is improved.

[0017] Optionally, a threaded connection section is arranged on the inner side of the top of the front connecting cylinder, and a protective cover is arranged on the top of the front connecting cylinder and threadedly connected with the front connecting cylinder through the threaded connection section. By adopting the above technical scheme, the protection effect of the parts on the inner side of the front connecting cylinder is achieved.

[0018] In summary, the present application has at least one of the following beneficial technical effects: Through the structural design of the transmission adjusting part and the up and down adjusting mechanism, the present application can realize the front and rear adjustment and the up and down adjustment of the handlebar to adapt to the riding requirements of people with different heights and arm lengths, so that the riding personnel can find a more comfortable handlebar position, the fatigue degree during long-time riding is reduced, the practicality and adaptability are greatly improved, the age range adapted by the bicycle is wider, and the market competitiveness is improved. The front and rear adjusting mechanism, the follow-up steering transmission structure and the up and down adjusting mechanism are arranged and matched, so that the transmission effect with the front wheel is realized while the front and rear positions and the up and down position of the handlebar are adjusted, the mechanical structure is simple and compact, the part cost is low, the practicality is good, and the invention is beneficial to popularization. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a front view structural schematic diagram of the handlebar located at the rear of the invention.

[0020] Figure 2 is an axial view structural schematic diagram of the handlebar located at the rear of the invention.

[0021] Figure 3 is a front view structural schematic diagram of the handlebar located at the front of the invention.

[0022] Figure 4 is an axial view structural schematic diagram of the handlebar located at the front of the invention.

[0023] Figure 5 is a front view structural schematic diagram of the front connecting cylinder, the front bridge frame, the transmission adjusting part, the up and down adjusting mechanism and the handlebar.

[0024] Figure 6 is an axial view structural schematic diagram of the front connecting cylinder, the front bridge frame, the transmission adjusting part, the up and down adjusting mechanism and the handlebar.

[0025] Figure 7 is a front view structural schematic diagram of the transmission adjusting part and the up and down adjusting mechanism.

[0026] Figure 8 is an axial view structural schematic diagram of the transmission adjusting part and the up and down adjusting mechanism.

[0027] Figure 9 is an exploded structural schematic diagram of the transmission adjusting part and the up and down adjusting mechanism.

[0028] Figure 10 is an exploded structural schematic diagram of the transmission adjusting part and the up and down adjusting mechanism.

[0029] Figure 11 is a structural schematic diagram of the up and down adjusting mechanism.

[0030] Figure 12 is a structural schematic diagram of the driving bevel gear and the guide groove two.

[0031] Figure 13 is a structural schematic diagram of the rotating support block and the guide transmission groove.

[0032] Figure 14 is a front view structural schematic diagram when the handlebar is adjusted to be high.

[0033] Figure 15 is the schematic view of the axle structure when the handlebar is adjusted. Figure 16 is the schematic view of the object plate structure.

[0034] Explanation of reference signs: 100, vehicle body; 110, front connecting cylinder; 120, front bridge frame; 130, handlebar; 200, transmission adjustment part; 210, mounting frame; 211, movable cavity; 212, connecting sleeve; 220, adjustment base; 221, bearing mounting hole; 222, mounting cavity; 223, guide groove I; 224, guide strip I; 230, driving bevel gear; 231, transmission bevel gear I; 232, rotating support block; 240, transmission rod; 241, guide transmission strip; 242, guide transmission groove; 251, transmission bevel gear II; 252, transmission bevel gear III; 253, connecting shaft; 254, bearing I; 260, screw I; 261, transmission gear; 262, driving gear; 263, mounting box; 264, adjustment sleeve; 270, support pipe; 280, protective cover; 290, folding protective cover; 291, avoiding groove; 300, up-down adjustment mechanism; 310, outer connecting cylinder; 311, adjustment cavity; 312, threaded connection groove; 313, guide strip II; 314, bearing II; 320, connecting outer cylinder; 321, guide groove II; 330, adjustment knob; 331, screw II; 332, support connecting block; 400, object plate. DETAILED DESCRIPTION

[0035] The following will be described in detail in combination with the accompanying drawings. Figures 1-16 The application is further described in detail.

[0036] The embodiments of the application disclose a handlebar-adjustable bicycle. Figures 1-16 A handlebar-adjustable bicycle, comprising a vehicle body 100, the vehicle body 100 comprising a front connecting cylinder 110, a front bridge frame 120 and a handlebar 130 at the front end of the vehicle body 100, the front bridge frame 120 being rotationally connected at the bottom of the front connecting cylinder 110 and having a front wheel rotating at the inner side of the bottom, and further comprising: a transmission adjustment part 200 arranged on the front connecting cylinder 110, the transmission adjustment part 200 comprising a follow-up steering transmission structure for transmitting the rotation of the handlebar 130 at different positions to the front bridge frame 120 to drive the rotation of the front bridge frame 120; and a front-rear adjustment mechanism for adjusting the front-rear position of the handlebar 130. an up-down adjustment mechanism 300 mounted on the transmission adjustment part 200, the handlebar 130 being mounted on the up-down adjustment mechanism 300, and the up-down adjustment mechanism 300 being used for adjusting the position of the handlebar 130 in the vertical direction.

[0037] Specifically, through the structural design of the transmission adjustment part 200 and the up-down adjustment mechanism 300, the front and rear adjustment and the up-down adjustment of the handlebar 130 can be realized to adapt to the riding needs of people of different heights and arm lengths, so that the rider can find a more comfortable grip position, reduce the fatigue degree during long-time riding, greatly improve the practicality and adaptability, and at the same time, the age range that the bicycle can adapt to is wider, thereby improving the market competitiveness.

[0038] Embodiment one With reference to Figures 5-11 The up-down adjustment mechanism 300 includes a connecting outer cylinder 320, and the handlebar 130 is fixed to the top outside of the connecting outer cylinder 320. When the rider rotates the handlebar 130 for steering, the connecting outer cylinder 320 is driven to rotate. The inside of the connecting outer cylinder 320 is provided with an outer connecting cylinder 310. The top inside of the connecting outer cylinder 320 is rotationally connected with a screw rod two 331. The inside of the outer connecting cylinder 310 is provided with a threaded connection groove 312 matched with the screw rod two 331 and an adjustment cavity 311 opened below the threaded connection groove 312. The screw rod two 331 passes through the threaded connection groove 312 and extends into the inside of the adjustment cavity 311. The screw rod two 331 is threadedly connected with the outer connecting cylinder 310 through the threaded connection groove 312. The top of the connecting outer cylinder 320 is rotationally connected with an adjustment knob 330. The top of the screw rod two 331 is fixedly connected with the adjustment knob 330. Further, in an optional embodiment, the bottom outside of the screw rod two 331 is rotationally connected with a support connecting block 332. The support connecting block 332 is slidingly connected to the inside of the adjustment cavity 311. The outer wall of the support connecting block 332 is attached to the inner wall of the connecting outer cylinder 320. When the bottom end of the screw rod two 331 is located inside the support connecting block 332, the bottom of the screw rod two 331 is not suspended in the air, but is supported by the connecting outer cylinder 320 and the support connecting block 332, thereby improving the stability during rotation and prolonging the service life.

[0039] Further, in an optional embodiment, the outer periphery of the outer connecting cylinder 310 is provided with a plurality of guide bars two 313. The inside of the connecting outer cylinder 320 is provided with a plurality of guide grooves two 321 matched with the guide bars two 313. The connecting outer cylinder 320 is slidingly connected to the outside of the outer connecting cylinder 310 through the cooperation of the guide grooves two 321 and the corresponding guide bars two 313. Specifically, through the cooperation of the guide grooves two 321 and the guide bars two 313, the rotation of the connecting outer cylinder 320 can drive the outer connecting cylinder 310 to rotate, and at the same time, the two can be relatively slidingly connected, which can simultaneously satisfy the rotation transmission and height adjustment of the handlebar 130, and realize complex functions through simple mechanical mechanisms.

[0040] In particular, when the height position of the handlebar 130 needs to be adjusted, the handlebar 130 is kept stationary or slightly rotated, and the adjusting knob 330 is rotated to drive the screw rod two 331 to rotate. When the screw rod two 331 rotates, it is screwed with the outer connecting cylinder 310, and the outer connecting cylinder 310 moves with the handlebar 130. When the handlebar 130 slightly moves, the screw rod two 331 and the outer connecting cylinder 310 rotate relative to each other, so that the screw rod two 331 gradually moves upward, and the connecting outer cylinder 320 moves upward with the screw rod two 331, thereby adjusting the height position of the handlebar 130.

[0041] Embodiment two With reference to Figures 5-11 The transmission adjusting part 200 includes a mounting frame 210 arranged along the length direction of the front connecting cylinder 110. An active cavity 211 is formed in the inner side of the mounting frame 210. The mounting frame 210 is provided with a connecting sleeve 212 matched with the one end of the front connecting cylinder 110. The connecting sleeve 212 is sleeved and fixed on the outer side of the front connecting cylinder 110. An adjusting base 220 is slidably connected to the inner side of the active cavity 211. The adjusting base 220 is matched with the inner side of the active cavity 211. The mounting frame 210 itself can play a guiding role on the adjusting base 220. A bearing two 314 is installed on the bottom outer side of the outer connecting cylinder 310. An adjusting base 220 is provided with a bearing installation hole 221 on the top inner side. The bearing two 314 is installed in the bearing installation hole 221. The outer connecting cylinder 310 is rotatably connected with the adjusting base 220 through the bearing two 314. The adjusting base 220 serves as a mounting seat of the up-down adjusting mechanism 300, and is used for supporting the up-down adjusting mechanism 300.

[0042] The adjusting base 220 is internally provided with a mounting cavity 222, the follow-up steering transmission structure comprises a driving bevel gear 230 fixed at the bottom of the outer connecting cylinder 310 and located inside the mounting cavity 222, when the outer connecting cylinder 310 rotates, the driving bevel gear 230 can be driven to rotate, one end of the driving bevel gear 230 is meshed with a transmission bevel gear one 231, the transmission bevel gear one 231 is rotatably connected to the adjusting base 220 and located inside the mounting cavity 222, a guide transmission bar 241 is clamped inside the transmission bevel gear one 231, the guide transmission bar 241 is rotatably connected to the inside of the mounting frame 210, one end of the guide transmission bar 241 extends into the inside of the front connecting cylinder 110 and is fixedly connected with a transmission bevel gear two 251, the transmission bevel gear two 251 is meshed with a transmission bevel gear three 252 at the bottom, a connecting shaft 253 is fixed at the top of the front bridge frame 120, the transmission bevel gear three 252 is fixedly connected to the top of the connecting shaft 253, a bearing one 254 is installed at the top outside of the connecting shaft 253, the connecting shaft 253 is rotatably connected to the front connecting cylinder 110 through the bearing one 254, specifically, when the handlebar 130 is manually rotated during riding, the outer cylinder 320, the outer connecting cylinder 310, the driving bevel gear 230, the transmission bevel gear one 231, the transmission rod 240, the transmission bevel gear two 251 and the transmission bevel gear three 252 are sequentially driven to rotate, the front bridge frame 120 can be driven to rotate through the rotation of the transmission bevel gear three 252, so as to drive the front wheel to steer.

[0043] The adjusting base 220 is rotatably connected with a rotating support block 232 at one end inside away from the transmission bevel gear one 231, the transmission rod 240 is inserted into the inside of the rotating support block 232 and the transmission bevel gear one 231, a plurality of guide transmission bars 241 are arranged on the outer periphery of the transmission rod 240, the rotating support block 232 and the transmission bevel gear one 231 are internally provided with guide transmission grooves 242 matched with the guide transmission bars 241, the transmission rod 240 is slidably connected with the rotating support block 232 and the transmission bevel gear one 231 through the cooperation of the guide transmission bars 241 and the guide transmission grooves 242, through the arrangement of the guide transmission bars 241 and the guide transmission grooves 242, when the transmission bevel gear one 231 rotates, it can not only drive the transmission rod 240 to rotate, but also can slide along the transmission rod 240, the transmission rod 240 plays the roles of rotational transmission between the transmission bevel gear one 231 and the transmission bevel gear two 251, sliding guide of the transmission bevel gear one 231, and guiding and supporting of the transmission bevel gear one 231 and the adjusting base 220, through the simple mechanical structure, the complicated function is realized, the manufacturing cost is greatly reduced, and the rotating support block 232 plays the role of supporting the transmission rod 240.

[0044] The front and rear adjusting mechanism comprises a screw rod one 260 threadedly connected to the inner side of the bottom of the adjusting base 220, the screw rod one 260 is threadedly connected to the inner side of the mounting frame 210, the mounting frame 210 is provided with a support tube 270 at the end away from the connecting sleeve 212, the two ends of the support tube 270 are fixed on the mounting frame 210 and the vehicle body 100 respectively, the end of the screw rod one 260 close to the support tube 270 extends out of the mounting frame 210 and is fixed with a transmission gear 261, the top of the transmission gear 261 is engaged with a driving gear 262, the driving gear 262 is rotatably connected to the outer side of the support tube 270, the outer side of the transmission gear 261 and the driving gear 262 is provided with a mounting box 263, the mounting box 263 is fixed on the mounting frame 210, the outer side of the support tube 270 and at the end of the mounting box 263 away from the mounting frame 210 is rotatably connected with an adjusting sleeve 264, one end of the adjusting sleeve 264 extends into the inner side of the mounting box 263 and is fixedly connected with the driving gear 262, when it is needed to adjust the position of the handlebar 130, the adjusting sleeve 264 is rotated to drive the driving gear 262 to rotate, and then the transmission gear 261 is driven to rotate, the screw rod one 260 is driven to rotate through the transmission gear 261, when the screw rod one 260 rotates, the adjusting base 220 can be driven to move along the screw rod one 260, so as to adjust the front and rear positions of the handlebar 130. The two sides of the movable cavity 211 are fixed with guide strips one 224, the two sides of the adjusting base 220 are provided with guide grooves one 223 matched with the guide strips one 224, the adjusting base 220 is slidably connected to the inner side of the mounting frame 210 through the cooperation of the guide grooves one 223 and the guide strips one 224, through the arrangement of the guide grooves one 223 and the guide strips one 224, the position of the adjusting base 220 can be limited, so that the movement is more stable, so that the position and movement process of the handlebar 130 are more stable.

[0045] The top of the movable cavity 211 and at the two sides of the adjusting base 220 is provided with a folding protective cover 290, the two ends of the folding protective cover 290 are connected to the adjusting base 220 and the mounting frame 210 respectively, the top of the mounting frame 210 and at the end of the movable cavity 211 close to the connecting sleeve 212 is provided with an avoiding groove 291, specifically, the two sides of the folding protective cover 290 are slidably connected to the inner side of the top of the mounting frame 210 and a sealing connection structure is arranged between the folding protective cover 290 and the mounting frame 210, so that the folding protective cover 290 can prevent dust and rain at the same time, thereby protecting the parts inside the mounting frame 210 and improving the service life; on the other hand, through the arrangement of the avoiding groove 291, when the handlebar 130 moves to the most front position, the folding protective cover 290 provides a containing space for the folded folding protective cover 290, avoiding the interference between the most front end and the adjusting base 220 affecting the movement of the adjusting base 220; In another alternative embodiment, the width of the folding protective cover 290 can be set to be greater than or equal to the width of the top of the mounting rack 210, so that it covers the top of the mounting rack 210, or its two sides are flush with the two sides of the top of the mounting rack 210, and a connecting piece is provided at the bottom of the folding protective cover 290, which is fixed on the connecting piece, and the connecting piece is slidingly connected to the inside of the top of the mounting rack 210. The design of the connecting piece should not affect the folding of the folding protective cover 290. In this way, to some extent, it can play a waterproof role, and the concave part of the folding line of the folding protective cover 290 is used as a drainage channel. When the rain falls on the top of the folding protective cover 290, it flows to both sides along the concave part of the folding line and flows out of the top of the mounting rack 210, preventing rainwater from entering the inside of the mounting rack 210.

[0046] A threaded connection section 213 is provided on the inside of the top of the front connecting cylinder 110, and a protective cover 280 is provided on the top of the front connecting cylinder 110 and is threadedly connected to the front connecting cylinder 110 through the threaded connection section 213. In another alternative embodiment, the protective cover 280 can be replaced by other functional modules to expand the functions of the bicycle.

[0047] In an alternative embodiment, as shown in Figure 16 The protective cover 280 can be replaced by a load plate 400, which is fixed on the top of the 110 by screws. In actual use, a support structure is provided on the load plate 400 to support it and improve the stability of the load. One end of the support structure is fixed on the bicycle body by screws.

[0048] The implementation principle of the bicycle with adjustable handlebars in an embodiment of the application is as follows: When the position of the handlebar 130 needs to be adjusted forward and backward, the rider manually rotates the adjustment sleeve 264, which in turn drives the drive gear 262, the transmission gear 261, and the first screw rod 260 to rotate, and then drives the adjustment base 220 to move along the first screw rod 260, thereby adjusting the forward and backward position of the handlebar 130. When the height position of the handlebar 130 needs to be adjusted, the handlebar is fixed by hand, and then the adjustment knob 330 is rotated to drive the second screw rod 331 to rotate. When the second screw rod 331 rotates, the connecting outer cylinder 320 will move upward with the second screw rod 331, thereby adjusting the height position of the handlebar 130. When the rider rotates the handlebar 130 at any position to adjust the direction, the handlebar 130 will drive the connecting outer cylinder 320 to rotate, and then in turn drive the outer connecting cylinder 310, the drive bevel gear 230, the transmission bevel gear one 231, the transmission rod 240, the transmission bevel gear two 251, the transmission bevel gear three 252, the connecting shaft 253, and the front bridge 120 to rotate, thereby driving the front wheel to rotate for direction adjustment.

[0049] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A handlebar-adjustable bicycle, comprising a vehicle body (100), the vehicle body (100) comprising a front connecting cylinder (110) at its front end, a front bridge (120) and a handlebar (130), the front bridge (120) being rotationally connected at the bottom of the front connecting cylinder (110) and having a front wheel rotationally connected at the bottom inner side thereof, characterized in that, Also include: Transmission adjustment part (200), set in the front connecting barrel (110), the transmission adjustment part (200) includes follow-up steering transmission structure, for the rotation of handlebar (130) in different positions is transmitted to the front bridge frame (120) and drives its rotation, also includes front and rear adjusting mechanism, for adjusting the front and rear position of the handlebar (130); Up and down adjusting mechanism (300) is installed on the transmission adjustment part (200), the handlebar (130) is installed on the up and down adjusting mechanism (300), the up and down adjusting mechanism (300) is used for adjusting the position of the handlebar (130) in the vertical direction.

2. A handlebar-adjustable bicycle according to claim 1, characterized in that: The up and down adjusting mechanism (300) includes a connecting outer cylinder (320), the handlebar (130) is fixed on the top of the connecting outer cylinder (320), the connecting outer cylinder (320) is provided with an outer connecting cylinder (310) on the inner side, the connecting outer cylinder (320) is rotatably connected with a screw rod two (331) on the inner side of the top, the outer connecting cylinder (310) is provided with a threaded connection groove (312) matched with the screw rod two (331) and an adjusting cavity (311) opened below the threaded connection groove (312) on the inner side, the screw rod two (331) passes through the threaded connection groove (312) and extends into the adjusting cavity (311) on the inner side, the screw rod two (331) is threadedly connected with the outer connecting cylinder (310) through the threaded connection groove (312), the connecting outer cylinder (320) is rotatably connected with an adjusting knob (330) on the top, the screw rod two (331) is fixedly connected with the adjusting knob (330) on the top.

3. A handlebar-adjustable bicycle according to claim 2, characterized in that: The bottom outer side of the screw rod two (331) is rotatably connected with a support connecting block (332), and the support connecting block (332) is slidably connected on the inner side of the adjusting cavity (311).

4. A handlebar-adjustable bicycle according to claim 2, characterized in that: The outer connecting cylinder (310) is provided with a plurality of guide strips two (313) on the outer periphery, and the connecting outer cylinder (320) is provided with a plurality of guide grooves two (321) matched with the guide strips two (313) on the inner side, and the connecting outer cylinder (320) is slidably connected on the outer side of the outer connecting cylinder (310) through the guide grooves two (321) matched with the guide strips two (313).

5. A handlebar adjustable bicycle as claimed in claim 3 wherein: The transmission adjusting part (200) comprises a mounting frame (210) arranged along the length direction of the front connecting barrel (110), a movable cavity (211) is formed in the inner side of the mounting frame (210), a connecting sleeve (212) matched with the front connecting barrel (110) is arranged at one end of the mounting frame (210) close to the front connecting barrel (110), the connecting sleeve (212) is fixedly sleeved on the outer side of the front connecting barrel (110), a adjusting base (220) is slidably connected in the inner side of the movable cavity (211), a bearing two (314) is arranged on the outer side of the bottom of the outer connecting barrel (310), a bearing mounting hole (221) is formed in the inner top of the adjusting base (220), the bearing two (314) is arranged in the inner side of the bearing mounting hole (221), and the outer connecting barrel (310) is rotatably connected with the adjusting base (220) through the bearing two (314).

6. A handlebar adjustable bicycle as claimed in claim 5 wherein: A mounting cavity (222) is formed in the inner side of the adjusting base (220), the follow-up steering transmission structure comprises a driving bevel gear (230) fixedly arranged on the bottom of the outer connecting barrel (310) and located in the inner side of the mounting cavity (222), one end of the driving bevel gear (230) is meshedly connected with a transmission bevel gear one (231), the transmission bevel gear one (231) is rotatably connected on the adjusting base (220) and located in the inner side of the mounting cavity (222), a guide transmission bar (241) is clamped on the inner side of the transmission bevel gear one (231), the guide transmission bar (241) is rotatably connected on the inner side of the mounting frame (210), one end of the guide transmission bar (241) extends into the inner side of the front connecting barrel (110) and is fixedly connected with a transmission bevel gear two (251), the transmission bevel gear two (251) is meshedly connected with a transmission bevel gear three (252) at the bottom, a connecting shaft (253) is fixedly arranged on the top of the front bridge frame (120), the transmission bevel gear three (252) is fixedly connected on the top of the connecting shaft (253), a bearing one (254) is arranged on the outer top of the connecting shaft (253), and the connecting shaft (253) is rotatably connected with the front connecting barrel (110) through the bearing one (254).

7. A handlebar adjustable bicycle as claimed in claim 6 wherein: The adjusting base (220) is rotatably connected with a rotating support block (232) at one end away from the transmission bevel gear one (231), the transmission rod (240) is inserted into the rotating support block (232) and the inner side of the transmission bevel gear one (231), a plurality of guide transmission bars (241) are arranged on the outer periphery of the transmission rod (240), the inner side of the rotating support block (232) and the transmission bevel gear one (231) are formed with guide transmission grooves (242) matched with the guide transmission bars (241), and the transmission rod (240) is slidably connected with the rotating support block (232) and the transmission bevel gear one (231) through the cooperation of the guide transmission bars (241) and the guide transmission grooves (242).

8. A handlebar-adjustable bicycle according to claim 7, characterized in that: The front and rear adjusting mechanism includes a screw rod one (260) screwed in the bottom inner side of the adjusting base (220), the screw rod one (260) is screwed in the inner side of the mounting frame (210), the mounting frame (210) is provided with a support pipe (270) away from one end of the connecting sleeve (212), both ends of the support pipe (270) are fixed on the mounting frame (210) and the vehicle body (100) respectively, one end of the screw rod one (260) close to the support pipe (270) extends out of the mounting frame (210) and is fixed with a transmission gear (261), the top of the transmission gear (261) is engaged with a driving gear (262), the driving gear (262) is rotatably connected to the outer side of the support pipe (270), the outer side of the transmission gear (261) and the driving gear (262) is provided with a mounting box (263), the mounting box (263) is fixed on the mounting frame (210), the outer side of the support pipe (270) and located away from one end of the mounting box (263) from the mounting frame (210) is rotatably connected with an adjusting sleeve (264), one end of the adjusting sleeve (264) extends into the inner side of the mounting box (263) and is fixedly connected with the driving gear (262); Both sides of the movable cavity (211) are fixed with a guide strip one (224), both sides of the adjusting base (220) are provided with a guide groove one (223) matched with the guide strip one (224), the adjusting base (220) is slidably connected to the inner side of the mounting frame (210) through the cooperation of the guide groove one (223) and the guide strip one (224).

9. A handlebar-adjustable bicycle according to claim 8, characterized in that: The top of the movable cavity (211) and located on both sides of the adjusting base (220) is provided with a folding protective cover (290), both ends of the folding protective cover (290) are connected to the adjusting base (220) and the mounting frame (210) respectively, the mounting frame (210) and located on the top of one end of the movable cavity (211) close to the connecting sleeve (212) is provided with an avoiding groove (291).

10. A handlebar-adjustable bicycle according to claim 8, characterized in that: The top inner side of the front connecting barrel (110) is provided with a threaded connection section (213), the top of the front connecting barrel (110) is provided with a protective cover (280), the protective cover (280) is screwed with the front connecting barrel (110) through the threaded connection section (213).

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