A rimless bicycle

Abstract

The invention discloses a rimless bicycle, comprising a frame, a hubless front wheel, a hubless rear wheel, pedals, pedal gears, rear wheel gears, and chains. The invention removes the rims, directly mounts the frame on hub support ring plates on both sides of the hub steel ring, drives the pedal gears to rotate by stepping on the pedals, and drives the rear wheel gears to rotate by the chain, thereby driving the hub steel ring to rotate, so that the bicycle can be ridden without a rim, thereby making the overall weight of the bicycle lighter than that of a traditional bicycle, and the wind resistance during riding is smaller, making it easier to ride, and at the same time solving the problem that the existing bicycle with a hub easily gets the limbs and clothes of the passenger entangled in the hub of the bicycle, which not only causes the bicycle to be unable to walk normally, but also damages the clothes of the passenger and harms the passenger's physical safety.

Description

Technical Field

[0001] The present invention relates to the field of transportation means, and particularly to a rimless bicycle. Background Art

[0002] With the improvement of people's living quality in our country, health and sports have been continuously mentioned. People advocate a low-carbon life and environmental-friendly travel, and bicycles are becoming more and more popular. There are shared bicycles in almost every city. Currently, basically all bicycles have wheels. They are small in size, flexible to carry, and low in price. Especially for cities with traffic congestion, bicycles are a good choice.

[0003] However, currently all bicycles have wheels, which makes the overall weight heavier. At the same time, the wheel hub sleeve and the wheel hub shaft are connected by steel wires, and there are quite large gaps between the steel wires. When a passenger rides on the rear seat of the bicycle, the limbs and clothes of the passenger are easily caught in the wheel hub of the bicycle, which not only causes the bicycle to unable to move normally, damages the clothes of the passenger, but also harms the physical safety of the passenger. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the background art and provide a rimless bicycle.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions:

[0006] A rimless bicycle includes a frame, a rimless front wheel, a rimless rear wheel, a foot pedal, a foot pedal gear, a rear wheel gear, and a chain. The rimless front wheel is arranged in front of the frame, the rimless rear wheel is arranged behind the frame, the foot pedal is arranged on the frame, the foot pedal gear is sleeved and fixed on the foot pedal. The rimless rear wheel includes a wheel hub steel ring, a wheel hub support ring plate, and a bearing mechanism. The two wheel hub support ring plates are arranged on both sides of the wheel hub steel ring, the wheel hub support ring plate is fixedly connected with the frame, and the bearing mechanism is arranged between the wheel hub steel ring and the wheel hub support ring plate to make the wheel hub steel ring roll. The rear wheel gear is arranged on the side of the wheel hub steel ring, and the chain is sleeved on the foot pedal gear and the rear wheel gear.

[0007] The present invention removes the rim and directly mounts the frame on the wheel hub support ring plates on both sides of the wheel hub steel ring. By stepping on the foot pedal to drive the rotation of the foot pedal gear, the rotation of the rear wheel gear is driven through the chain, and then the rotation of the wheel hub steel ring is driven, realizing that it is possible to move without a rim. Thus, the overall weight of the bicycle is relatively lighter than that of a traditional bicycle, and the wind resistance during riding is smaller, which is convenient for riding. At the same time, it solves the problem that the existing bicycles with wheels are likely to catch the limbs and clothes of passengers in the wheel hub of the bicycle, which not only causes the bicycle to unable to move normally, damages the clothes of the passengers, but also harms the physical safety of the passengers.

[0008] The hubless front wheel of the present invention includes a hub steel ring, a hub support ring plate, and a bearing mechanism. The two hub support ring plates are arranged on both sides of the hub steel ring. The hub support ring plate is fixedly connected to the frame. The bearing mechanism is arranged between the hub steel ring and the hub support ring plate to enable the hub steel ring to roll.

[0009] The overall body design of the present invention is streamlined, with more exquisite craftsmanship, meeting the aesthetic standards of modern young people.

[0010] Preferably, the bearing mechanism includes a first bearing. A plurality of the first bearings are circumferentially distributed on the hub support ring plate. The inner rings of the first bearings are fixedly connected along the axial direction with bearing shafts. The side walls of the outer rings of each first bearing are in contact with the side wall of the hub steel ring.

[0011] Through the contact between the first bearing and the hub steel ring, the present invention enables the hub support ring plate to clamp the hub steel ring, preventing the hub steel ring from shaking left and right, and at the same time ensuring the rotational connection between the hub support ring plate and the hub steel ring. When the chain drives the rear wheel gear to rotate, it can drive the hub steel ring to rotate, thereby enabling the bicycle to move forward.

[0012] Preferably, at the position of the hub support ring plate where the first bearing is provided, a cross-shaped installation through groove matching with the first bearing is opened. The cross-shaped installation through groove includes a clamping groove and a movable groove. The bearing shaft is stuck in the clamping groove, and the first bearing is stuck in the movable groove. An upper clamping block is formed at the position of the upper surface of the inner ring of the first bearing in the clamping groove, and a lower clamping block is formed at the position of the lower surface of the inner ring of the first bearing in the clamping groove.

[0013] The present invention fixes the bearing shaft and the hub support ring plate through the clamping groove, places the first bearing in the movable groove, enables the first bearing to roll, and at the same time strengthens the fixation of the first bearing through the clamping of the upper clamping block and the lower clamping block on the inner ring of the first bearing.

[0014] Preferably, a second bearing is further arranged between the two hub support ring plates. The second bearings are circumferentially distributed on the side wall of the inner ring of the hub steel ring, and the rotation direction of the second bearings is the same as the rolling direction of the hub steel ring. The side walls of the second bearings are in contact with the inner wall of the hub steel ring. A connecting shaft is fixedly connected to the inner ring of the second bearing, and both ends of the connecting shaft are fixedly connected to the hub support ring plate.

[0015] By arranging the second bearing, the present invention enables the hub support ring plate and the hub steel ring to remain concentric, prevents the hub steel ring from moving back and forth, reduces the friction during rotation, and extends the service life.

[0016] Preferably, the vehicle frame is fixedly connected to the hub support ring plate through a connecting frame. The connecting frame includes a first fixing plate, a second fixing plate, a third fixing plate, a first connecting rod, a second connecting rod, and an extension plate. A first waist-shaped hole is formed from the left side surface to the right side surface of the hub support ring plate. The first waist-shaped holes are circumferentially evenly distributed in the circumferential direction of the hub support ring plate and are spaced from the cross-shaped installation through groove. The first fixing plate is fixed to one of the first waist-shaped holes by a locking bolt. The second fixing plate is fixed to an adjacent first waist-shaped hole by a locking bolt. The third fixing plate is arranged outside the first fixing plate and the second fixing plate. The first connecting rod is arranged between the first fixing plate and the third fixing plate. The second connecting rod is arranged between the second fixing plate and the third fixing plate. The third fixing plate is fixedly connected to the vehicle frame through the extension plate.

[0017] In the present invention, the first fixing plate, the second fixing plate and the first waist-shaped hole are connected by a locking bolt, so that the connecting frame is fixed to the hub support ring plate. The first bearing can maintain rolling through the first connecting rod and the second connecting rod, which form a rolling space between the first fixing plate, the second fixing plate and the third fixing plate. The connecting frame is fixed to the vehicle frame by connecting the third fixing plate and the vehicle frame with a locking bolt, so that the hub support ring plate is fixedly connected to the vehicle frame without affecting the rolling of the first bearing.

[0018] Preferably, a booster motor is further provided on the chain. The output end of the booster motor is fixedly connected with a driving gear, and the driving gear is meshed with the chain. The motor end of the booster motor is fixed on the vehicle frame. The chain is driven by the booster motor, so as to drive the rear wheel, which is more labor-saving and makes the travel easier.

[0019] Preferably, the rear wheel gear includes a gear body, a support ring, a ratchet wheel, and a ratchet pawl. The inner ring of the support ring is fixed on the side wall of the hub steel ring. The ratchet pawl is arranged on the support ring. The ratchet wheel is arranged on the outer ring of the support ring. The inner side of the ratchet wheel has ratchet teeth that cooperate with the ratchet pawl. The gear body is fixed on the outer ring of the ratchet wheel. A fixing ring is fixedly connected to the position of the hub steel ring close to the rear wheel gear. The gear body is arranged between the fixing ring and the hub support ring plate. A bearing installation groove is formed on one side of the fixing ring close to the gear body. The bearing installation grooves are circumferentially evenly distributed on the fixing ring. A third bearing is installed in the bearing installation groove. The inner ring of the third bearing is fixedly connected with a fixing shaft, and the fixing shaft is fixedly connected with the side wall of the bearing installation groove. The third bearing can roll in the bearing installation groove. The third bearing contacts the side wall of the gear body. The position of the third bearing corresponds to and the number is the same as that of the first bearing.

[0020] In the present invention, through the third bearing on the fixing ring and the first bearing on the hub support ring plate, the gear body can be held between the fixing ring and the hub support ring plate while being able to rotate. Then, through the cooperation of the ratchet pawl and the ratchet teeth, the gear body can only rotate clockwise, thereby preventing the bicycle from moving backward and making the rimless bicycle safer to use.

[0021] Preferably, the ratchet pawl includes a hinge block and a movable rod. One end of the movable rod is hinged to the hinge block, and the other end is a free end. The free end of the movable rod is in the shape of a right-angled arrow. The ratchet teeth are composed of a right-angled clamping portion that can clamp the right-angled arrow shape of the movable rod and a transition portion that facilitates the movement of the movable rod to an adjacent ratchet tooth. A C-shaped limiting groove opposite to the opening of the right-angled clamping portion is formed on the support ring. The hinge block is arranged in the C-shaped limiting groove and is hinged to the support ring. A groove is formed on the lower side wall of the C-shaped limiting groove, and a spring is arranged in the groove. One end of the spring is fixedly connected to the bottom of the groove, and the other end is fixedly connected to the side wall of the movable rod.

[0022] In the present invention, through the C-shaped limiting groove, the needle is prevented from rotating excessively. Since the free end of the movable rod is in the shape of a right-angled arrow, the contact surface is increased to reduce jamming, the force-bearing angle is small, and the kinetic energy is increased.

[0023] Preferably, the braking method can brake the hub steel rim, and the method can be clamping braking;

[0024] Preferably, a sealing ring is fixedly connected to the inner ring of the hub steel rim. Through the design of the sealing ring, dust and water are prevented from remaining on the inner wall of the hub steel rim, thereby affecting the use of the bearing.

[0025] Preferably, a shock absorber is arranged on the frame to make the riding more stable.

[0026] In summary, the beneficial effects of the present invention are as follows:

[0027] 1. In the present invention, the rim is removed, and the frame is directly placed on the hub support ring plates on both sides of the hub steel rim. By stepping on the foot pedal to drive the rotation of the foot pedal gear, the rotation of the rear wheel gear is driven through the chain, thereby driving the rotation of the hub steel rim, realizing that the bicycle can move without a rim. As a result, the overall weight of the bicycle is relatively lighter than that of a traditional bicycle, and the wind resistance during riding is smaller, which is convenient for riding. At the same time, it solves the problem that in the existing bicycles with rims, the limbs and clothes of passengers are easily caught in the rims of the bicycles, which not only causes the bicycle to be unable to move normally, damages the clothes of the passengers, but also harms the physical safety of the passengers;

[0028] 2. Through the contact between the first bearing and the hub steel ring, the hub support ring plate can clamp the hub steel ring to prevent the hub steel ring from swaying left and right. By setting the second bearing, the hub support ring plate and the hub steel ring can be kept concentric to prevent the hub steel ring from moving back and forth. At the same time, the rotational connection between the hub support ring plate and the hub steel ring is ensured, making the riding more comfortable.

[0029] 3. Through the third bearing on the fixing ring and the first bearing on the hub support ring plate, the gear body can be clamped between the fixing ring and the hub support ring plate and can rotate. Then, through the cooperation between the pawl and the ratchet teeth, the gear body can only rotate clockwise, thereby preventing the bicycle from moving backward and making the rimless bicycle safer to use.

[0030] 4. Through the C-shaped limiting groove, the needle can be prevented from rotating excessively. The free end of the movable rod is in the shape of a right-angled arrow, which increases the contact surface, reduces jamming, and has a small force angle, increasing the kinetic energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural view of the present invention;

[0032] Figure 2 is an overall schematic view of the present invention;

[0033] Figure 3 is a schematic view of the hubless rear wheel of the present invention;

[0034] Figure 4 is a front view schematic view of the hub support ring plate of the present invention;

[0035] Figure 5 is a front view schematic view of the first bearing of the present invention stuck in the hub support ring plate;

[0036] Figure 6 is the present invention Figure 5 an enlarged schematic view of part A;

[0037] Figure 7 is a schematic view of the fixing ring of the present invention;

[0038] Figure 8 is the present invention Figure 7 an enlarged schematic view of part B;

[0039] Figure 9 is a schematic view of the rear wheel gear of the present invention;

[0040] Figure 10 is a schematic view of the hubless rear wheel of the present invention with a sealing ring installed. DETAILED DESCRIPTION OF THE INVENTION

[0041] The following specific embodiments are merely explanations of the present invention and are not limitations thereof. After reading this specification, those skilled in the art may make modifications to these embodiments without creative contributions as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0042] The present invention will be described in detail below with reference to the accompanying drawings by way of examples.

[0043] Embodiment 1

[0044] As Figures 1-10As shown in the figure, a rimless bicycle includes a frame 8, a rimless front wheel 10, a rimless rear wheel 11, a pedal 14, a pedal gear 7, a rear wheel gear 6, and a chain 13. A seat 16 is also provided on the frame 8, and a handle 15 is provided at the front of the frame 8. The extension plate 86 of the rear wheel connecting frame 1 is fixedly connected to the mounting plate 17 of the frame. The rimless front wheel 10 is arranged in front of the frame 8, the rimless rear wheel 11 is arranged behind the frame 8, the pedal 14 is arranged on the frame 8, the pedal gear 7 is sleeved and fixed on the pedal 14. The rimless rear wheel 11 includes a wheel hub steel ring 2, a wheel hub support ring plate 3, and a bearing mechanism 4. The two wheel hub support ring plates 3 are arranged on both sides of the wheel hub steel ring 2, and the wheel hub support ring plate 3 is fixedly connected to the frame 8. The bearing mechanism 4 is arranged between the wheel hub steel ring 2 and the wheel hub support ring plate 3 to enable the wheel hub steel ring 2 to roll. The rear wheel gear 6 is fixed on the outer side wall of the wheel hub steel ring 2, and the chain 13 is sleeved on the pedal gear 7 and the rear wheel gear 6. The bearing mechanism 4 includes a first bearing 41. A plurality of the first bearings 41 are circumferentially and evenly distributed on the wheel hub support ring plate 3. The inner rings of the first bearings 41 are fixedly connected along the axial direction with bearing shafts 42. The side walls of the outer rings of each first bearing 41 are in contact with the side wall of the wheel hub steel ring 2. At the position where the first bearing 41 is provided on the wheel hub support ring plate 3, a cross-shaped installation through groove 31 that cooperates with the first bearing 41 is provided. The cross-shaped installation through groove 31 includes a clamping groove 311 and a movable groove 312. The bearing shaft 42 is stuck in the clamping groove 311, and the first bearing 41 is stuck in the movable groove 312. An upper clamping block 313 is formed at the position of the upper surface of the inner ring of the first bearing 41 in the clamping groove 311, and a lower clamping block 314 is formed at the position of the lower surface of the inner ring of the first bearing 41 in the clamping groove 311. A second bearing 5 is also provided between the two wheel hub support ring plates 3. The second bearings 5 are circumferentially and evenly distributed on the side wall of the inner ring of the wheel hub steel ring 2 and the rotation direction of the second bearings 5 is the same as the rolling direction of the wheel hub steel ring 2. The side walls of the second bearings 5 are in contact with the inner wall of the wheel hub steel ring 2. A connecting shaft 51 is fixedly connected to the inner ring of the second bearing 5, and both ends of the connecting shaft 51 are fixedly connected to the wheel hub support ring plate 3. The frame 8 and the wheel hub support ring plate 3 are fixedly connected through a connecting frame 1. The connecting frame 1 includes a first fixing plate 81, a second fixing plate 82, a third fixing plate 83, a first connecting rod 84, a second connecting rod 85, and an extension plate 86. A first waist-shaped hole 32 is provided from the left side surface to the right side surface of the wheel hub support ring plate 3. The first waist-shaped holes 32 are circumferentially and evenly distributed in the circumferential direction of the wheel hub support ring plate 3 and the first waist-shaped holes 32 and the cross-shaped installation through groove 31 are distributed at intervals. The first fixing plate 81 is fixed on one of the first waist-shaped holes 32 through a locking bolt.The second fixing plate 82 is fixed on the adjacent first waist-shaped hole 32 by a locking bolt. The third fixing plate 83 is arranged outside the first fixing plate 81 and the second fixing plate 82. The first connecting rod 84 is arranged between the first fixing plate 81 and the third fixing plate 83. The second connecting rod 85 is arranged between the second fixing plate 82 and the third fixing plate 83. The third fixing plate 83 is fixedly connected to the vehicle frame 8 through an extension plate 86. A sealing ring 20 is fixedly connected to the inner ring of the hub steel ring 2. A shock absorber 9 is arranged on the vehicle frame 8.,

[0045] As Figures 1-2 shown, a booster motor 12 is further arranged on the chain 13. The output end of the booster motor 12 is fixedly connected to a driving gear 121. The driving gear 121 is meshed with the chain 13. The motor end of the booster motor 12 is fixed on the vehicle frame 8.

[0046] As Figures 7-9As shown, the rear wheel gear 6 includes a gear body 61, a support ring 62, a ratchet wheel 63, and a ratchet pawl 64. The support ring 62 is fixed on the side wall of the hub steel ring 2. The ratchet pawl 64 is arranged on the support ring 62. The ratchet wheel 63 is arranged on the outer ring of the support ring 62. The inner side of the ratchet wheel 63 has ratchet teeth 65 that cooperate with the ratchet pawl 64. The gear body 61 is fixed on the outer ring of the ratchet wheel 63. A fixing ring 21 is fixedly connected at a position of the hub steel ring 2 close to the rear wheel gear 6. The gear body 61 is arranged between the fixing ring 21 and the hub support ring plate 3. A bearing installation groove 211 is formed on one side of the fixing ring 21 close to the gear body 61. The bearing installation grooves 211 are circumferentially and evenly distributed on the fixing ring 21. A third bearing 212 is installed in the bearing installation groove 211. The inner ring of the third bearing 212 is fixedly connected with a fixing shaft 213. The fixing shaft 213 is fixedly connected with the side wall of the bearing installation groove 211. The third bearing 212 can roll in the bearing installation groove 211. The third bearing 212 contacts the side wall of the gear body 61. The ratchet pawl 64 includes a hinge block 641 and a movable rod 642. One end of the movable rod 642 is hinged to the hinge block 641, and the other end is a free end. The free end of the movable rod 642 is in the shape of a right-angled arrow. The ratchet tooth 65 is composed of a right-angled clamping portion 651 that can clamp the right-angled arrow shape of the movable rod 642 and a transition portion 652 that facilitates the movement of the movable rod 642 to an adjacent ratchet tooth 65. A C-shaped limiting groove 653 is formed on the support ring 62 opposite to the opening of the right-angled clamping portion 651. The hinge block 641 is arranged in the C-shaped limiting groove 653 and is hinged to the support ring 62. A groove 621 is formed on the lower side wall of the C-shaped limiting groove 653. A spring 622 is arranged in the groove 621. One end of the spring 622 is fixedly connected to the bottom of the groove 621, and the other end is fixedly connected to the side wall of the movable rod 642.

[0047] Working principle: As Figures 1-10As shown in the figure, the inner ring of the fixed ring 21 is fixed on the inner ring side wall of the hub steel ring 2. Then, the rear wheel gear 6 is placed on the side of the fixed ring 21, and the support ring 62 of the rear wheel gear 6 is fixedly connected to the side wall of the inner ring of the hub steel ring 2. After that, a hub support ring plate 3 is placed on the side of the rear wheel gear 6, and another hub support ring plate is placed on the side of the hub steel ring 2 where the rear wheel gear 6 is not installed, so that the hub steel ring 2 is clamped between the two hub support ring plates 3. The connecting shaft fixed with the second bearing 5 is fixedly connected to the hub support ring plate 3, thus completing the installation of the rimless rear wheel 11. The rimless front wheel 10 has one less rear wheel gear 6 and fixed ring compared with the rimless rear wheel 11. Then, the installed rimless rear wheel 11 and rimless front wheel 10 are assembled with the frame 8 through the connecting frame. After that, the chain is installed. When riding, stepping on the foot pedal 14 drives the foot pedal gear 7 to rotate clockwise, so that the chain 13 drives the gear body 61 to rotate clockwise, thereby driving the hub steel ring 2 to rotate clockwise, realizing walking without a rim. At the same time, through the cooperation of the pawl 64 and the ratchet teeth 65, the gear body can only rotate clockwise, thus preventing the bicycle from moving backward, making the rimless bicycle safer to use. Removing the rim makes the overall weight of the bicycle lighter than that of a traditional bicycle, and the wind resistance during riding is smaller, which is convenient for riding. At the same time, it solves the problem that the existing bicycles with rims are prone to winding the limbs and clothes of passengers into the wheels of the bicycle, which not only causes the bicycle to not move normally, damages the clothes of passengers, but also harms the physical safety of passengers.

[0048] Embodiment 2

[0049] As Figures 1-9As shown in the figure, a rimless bicycle includes a frame 8, a hubless front wheel 10, a hubless rear wheel 11, a foot pedal 14, a foot pedal gear 7, a rear wheel gear 6, and a chain 13. The hubless front wheel 10 is arranged in front of the frame 8, and the hubless rear wheel 11 is arranged behind the frame 8. The foot pedal 14 is arranged on the frame 8, and the foot pedal gear 7 is sleeved and fixed on the foot pedal 14. The hubless rear wheel 11 includes a hub steel ring 2, a hub support ring plate 3, and a bearing mechanism 4. Two hub support ring plates 3 are arranged on both sides of the hub steel ring 2. The hub support ring plate 3 is fixedly connected to the frame 8. The bearing mechanism 4 is arranged between the hub steel ring 2 and the hub support ring plate 3 to enable the hub steel ring 2 to roll. The rear wheel gear 6 is fixed on the outer side wall of the hub steel ring 2. The chain 13 is sleeved on the foot pedal gear 7 and the rear wheel gear 6. The bearing mechanism 4 includes a first bearing 41. A plurality of first bearings 41 are circumferentially and evenly distributed on the hub support ring plate 3. The inner rings of the first bearings 41 are fixedly connected along the axial direction with bearing shafts 42. The side walls of the outer rings of each first bearing 41 are in contact with the side wall of the hub steel ring 2. At the position where the hub support ring plate 3 is provided with the first bearing 41, a cross-shaped installation through groove 31 that cooperates with the first bearing 41 is opened. The cross-shaped installation through groove 31 includes a clamping groove 311 and a movable groove 312. The bearing shaft 42 is stuck in the clamping groove 311, and the first bearing 41 is stuck in the movable groove 312. At the position of the upper surface of the inner ring of the first bearing 41 in the clamping groove 311, an upper clamping block 313 is formed. At the position of the lower surface of the inner ring of the first bearing 41 in the clamping groove 311, a lower clamping block 314 is formed. A second bearing 5 is further arranged between the two hub support ring plates 3. The second bearings 5 are circumferentially and evenly distributed on the side wall of the inner ring of the hub steel ring 2, and the rotation direction of the second bearings 5 is the same as the rolling direction of the hub steel ring 2. The side walls of the second bearings 5 are in contact with the inner wall of the hub steel ring 2. A connecting shaft 51 is fixedly connected to the inner ring of the second bearing 5. Both ends of the connecting shaft 51 are fixedly connected to the hub support ring plate 3. The frame 8 and the hub support ring plate 3 are fixedly connected through a connecting frame 1. The connecting frame 1 includes a first fixing plate 81, a second fixing plate 82, a third fixing plate 83, a first connecting rod 84, a second connecting rod 85, and an extension plate 86. A first waist-shaped hole 32 is opened from the left side surface to the right side surface of the hub support ring plate 3. The first waist-shaped holes 32 are circumferentially and evenly distributed in the circumferential direction of the hub support ring plate 3 and are spaced from the cross-shaped installation through groove 31. The first fixing plate 81 is fixed on one of the first waist-shaped holes 32 through a locking bolt. The second fixing plate 82 is fixed on an adjacent first waist-shaped hole 32 through a locking bolt. The third fixing plate 83 is arranged outside the first fixing plate 81 and the second fixing plate 82.The first connecting rod 84 is disposed between the first fixing plate 81 and the third fixing plate 83, the second connecting rod 85 is disposed between the second fixing plate 82 and the third fixing plate 83, the third fixing plate 83 is fixedly connected to the frame 8 via an extension plate 86, a sealing ring 20 is fixedly connected to the inner ring of the hub steel rim 2, and a shock absorber 9 is disposed on the frame 8.

[0050] like Figures 1-2 As shown, a power-assisting motor 12 is also provided on the chain 13 , and a driving gear 121 is fixedly connected to the output end of the power-assisting motor 12 . The driving gear 121 is meshedly connected to the chain 13 , and the motor end of the power-assisting motor 12 is fixed on the frame 8 .

[0051] Working principle: Figures 1-9 As shown, the rear wheel gear 6 is fixed to one side of the inner ring of the hub steel rim 2, and then a hub support ring plate 3 is placed on the side of the rear wheel gear 6, and the other hub support ring plate is placed on the side of the hub steel rim 2 where the rear wheel gear 6 is not installed, so that the hub steel rim 2 is clamped between the two hub support ring plates 3, and the connecting shaft fixed with the second bearing 5 is fixedly connected to the hub support ring plates 3, thereby completing the installation of the hubless rear wheel 11. Compared with the hubless rear wheel 11, the hubless front wheel 10 lacks the rear wheel gear 6. Then the installed hubless rear wheel 11 and the hubless front wheel 10 are connected to the frame through a connecting frame. 8 is assembled, and then the chain is installed. When riding is needed, the pedal gear 7 is driven to rotate by stepping on the pedal 14, so that the chain 13 drives the rear wheel gear 6 to rotate, thereby driving the hub steel ring 2 to rotate, so that walking without a rim is achieved. Removing the rim makes the overall weight of the bicycle lighter than that of a traditional bicycle, and the wind resistance during riding is smaller, which is convenient for riding. At the same time, it solves the problem that the existing bicycle with a hub easily gets the limbs and clothes of the passenger entangled in the wheel hub of the bicycle, which not only causes the bicycle to be unable to walk normally, but also damages the clothes of the passenger and harms the physical safety of the passenger.

Claims

1. A rimless bicycle, characterized in that, It includes a frame, a hubless front wheel, a hubless rear wheel, a foot pedal, a foot pedal gear, a rear wheel gear, and a chain. The hubless front wheel is provided in front of the frame, the hubless rear wheel is provided behind the frame, the foot pedal is provided on the frame, the foot pedal gear is sleeved and fixed on the foot pedal, the hubless rear wheel includes a wheel hub steel ring, a wheel hub support ring plate, and a bearing mechanism. Two of the wheel hub support ring plates are provided on both sides of the wheel hub steel ring, the wheel hub support ring plate is fixedly connected to the frame, and the bearing mechanism is provided between the wheel hub steel ring and the wheel hub support ring plate to enable the wheel hub steel ring to roll. The rear wheel gear is provided on the side of the wheel hub steel ring, and the chain is sleeved on the foot pedal gear and the rear wheel gear; The bearing mechanism includes a first bearing. A plurality of the first bearings are circumferentially distributed on the wheel hub support ring plate. The inner rings of the first bearings are fixedly connected along the axial direction with bearing shafts, and the side walls of the outer rings of each first bearing are in contact with the side wall of the wheel hub steel ring; At the position where the first bearing is provided on the wheel hub support ring plate, a cross-shaped installation through groove that cooperates with the first bearing is provided. The cross-shaped installation through groove includes a clamping groove and a movable groove. The bearing shaft is stuck in the clamping groove, the first bearing is stuck in the movable groove, an upper clamping block is formed at the position of the upper surface of the inner ring of the first bearing in the clamping groove, and a lower clamping block is formed at the position of the lower surface of the inner ring of the first bearing in the clamping groove; A second bearing is further provided between the two wheel hub support ring plates. The second bearings are circumferentially distributed on the side wall of the inner ring of the wheel hub steel ring and the rotation direction of the second bearing is the same as the rolling direction of the wheel hub steel ring. The side wall of the second bearing is in contact with the inner wall of the wheel hub steel ring, and a connecting shaft is fixedly connected to the inner ring of the second bearing. Both ends of the connecting shaft are fixedly connected to the wheel hub support ring plate; The frame and the wheel hub support ring plate are fixedly connected through a connecting frame. The connecting frame includes a first fixing plate, a second fixing plate, a third fixing plate, a first connecting rod, a second connecting rod, and an extension plate. A first kidney-shaped hole is provided from the left side surface to the right side surface of the wheel hub support ring plate. The first kidney-shaped holes are circumferentially distributed in the circumferential direction of the wheel hub support ring plate and the first kidney-shaped holes are spaced from the cross-shaped installation through groove. The first fixing plate is fixed on one of the first kidney-shaped holes through a locking bolt, the second fixing plate is fixed on an adjacent first kidney-shaped hole through a locking bolt, the third fixing plate is provided outside the first fixing plate and the second fixing plate, the first connecting rod is provided between the first fixing plate and the third fixing plate, the second connecting rod is provided between the second fixing plate and the third fixing plate, and the third fixing plate is fixedly connected to the frame through the extension plate.

2. The rimless bicycle according to claim 1, wherein, A booster motor is further provided on the chain. The output end of the booster motor is fixedly connected with a driving gear, the driving gear is meshed with the chain, and the motor end of the booster motor is fixed on the frame.

3. The rimless bicycle according to claim 1, wherein The rear wheel gear includes a gear body, a support ring, a ratchet wheel, and a pawl. The support ring is fixed on the side wall of the hub steel rim. The pawl is arranged on the support ring. The ratchet wheel is arranged on the outer ring of the support ring. The inner side of the ratchet wheel has ratchet teeth that cooperate with the pawl. The gear body is fixed on the outer ring of the ratchet wheel. A fixing ring is fixedly connected to the position of the hub steel rim close to the rear wheel gear. The gear body is arranged between the fixing ring and the hub support ring plate. A bearing installation groove is formed on one side of the fixing ring close to the gear body. The bearing installation grooves are circumferentially distributed on the fixing ring. A third bearing is installed in the bearing installation groove. The inner ring of the third bearing is fixedly connected to a fixing shaft. The fixing shaft is fixedly connected to the side wall of the bearing installation groove. The third bearing can roll in the bearing installation groove. The third bearing contacts the side wall of the gear body.

4. The rimless bicycle according to claim 3, wherein, The pawl includes a hinge block and a movable rod. One end of the movable rod is hinged to the hinge block, and the other end is a free end. The free end of the movable rod is in the shape of a right-angled arrow. The ratchet teeth are composed of a right-angled clamping part that can clamp the right-angled arrow shape of the movable rod and a transition part that facilitates the movable rod to move to an adjacent ratchet tooth. A C-shaped limit groove opposite to the opening of the right-angled clamping part is formed on the support ring. The hinge block is arranged in the C-shaped limit groove and is hinged to the support ring. A groove is formed on the lower side wall of the C-shaped limit groove. A spring is arranged in the groove. One end of the spring is fixedly connected to the bottom of the groove, and the other end is fixedly connected to the side wall of the movable rod.

5. A rimless bicycle according to claim 1, characterized in that, A sealing ring is fixedly connected to the inner ring of the hub steel rim.

6. The rimless bicycle according to claim 1, wherein, A shock absorber is arranged on the vehicle frame.

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