sports bike

Abstract

Sports bicycle, comprehensive a frame (1); a seating element (2) which is arranged on the frame (1); a drive pedal (21) which is arranged on the frame (1) and is located on one side of the seat element (2); a pedal chain (211) which is connected to and driven by one side of the drive pedal (21); two running wheels (22) arranged on both sides of the seat element (2); a drive gear set (3) connected to one side of the running wheels (22) and driving them to rotation; a force switching device (4) arranged on the frame (1), located between the drive pedal (21) and the drive gear set (3), comprising a switching element (41) movably arranged on one side of the frame (1), a clutch wheel (43) movably arranged on one side of the switching element (41) via a first axle (42), a first transmission wheel (44) connected to the pedal chain (211) and arranged on the first axle (42), a counter wheel (441) attached to the side of the first transmission wheel (44) facing the clutch wheel (43), and a separating guide groove (45) provided on the switching element (41) for receiving the clutch wheel (43) to engage it with the counter wheel (441) and for pushing the clutch wheel (43) to separate it from the counter wheel (441); a gear brake (5) arranged on the frame (1) and located between the power switching device (4) and the drive gear set (3), a second transmission gear (51) arranged via the first axle (42) on the side of the frame (1) facing away from the switching element (41), a drive chain (52) connecting the second transmission gear (51) and the drive gear set (3), a brake gear (53) arranged on one side of the drive gear set (3) and rotating synchronously with it, a handbrake actuating element (54) pivotally arranged on one side of the frame (1), and a stopper (55) arranged on one side of the handbrake actuating element (54) to block the brake gear (53); and a resistance adjusting element (6) which is arranged on the side of the frame (1) close to the drive pedal (21) to adjust the rotational resistance of the drive pedal (21).

Description

Technical field

[0001] The invention relates to a sports bicycle that has both a riding mode and a training mode for the lower limbs and has the functions of stabilization and resistance adjustment. State of the art

[0002] In the fields of rehabilitation, fitness, and sports, bicycles have long been considered a good piece of equipment for training the lower limbs. However, existing designs still present many problems in practical application, particularly in rehabilitation and indoor sports.

[0003] First, while traditional road cycling provides an effective workout, it poses a higher safety risk for rehabilitation patients, the elderly, or users in poor physical condition, such as falls due to loss of balance, traffic accidents, and so on. Furthermore, outdoor cycling is not always suitable for training due to factors like weather and location, which is why gyms and rehabilitation centers typically use flywheel bikes instead. However, flywheel bikes are bulky and expensive and not suitable for home use. Users must visit gyms or medical facilities to access them, which costs time and money and reduces convenience and popularity.

[0004] Secondly, although some bicycles can lock the rear wheel to stabilize the frame, this is usually achieved through friction between the brake pads and the rim. However, after prolonged use, this mechanism can weaken due to brake pad wear, and the wheel may even slip slightly due to the elastic deformation of the brake pads, compromising the rider's stability. This instability can pose additional risks to the rider, particularly during rehabilitation or intensive training.

[0005] On the other hand, exercise bikes with adjustable resistance are available, which can simulate the intensity of outdoor cycling. However, these devices typically use magnetic resistance or tire friction to change the resistance. The former offer too little resistance, and the latter generates noise.

[0006] In general, existing bicycles and training equipment still present problems regarding safety, stability, cost, and comfort when used in rehabilitation and indoor sports. They cannot simultaneously meet the requirements of static training and daily riding. Object of the invention

[0007] The object of the invention is to use the force-switching device to switch the drive pedal into neutral mode and to enable a simple and quick switch between riding and training modes. Furthermore, the invention's gear brake allows the drive wheelset to be stably locked, thus preventing the wheels from slipping during training and increasing safety. The resistance adjustment allows the rotational resistance of the drive pedal to be directly adjusted to reduce noise caused by tire friction.

[0008] This object is achieved by the invention, which comprises: a frame, a seat element, a drive pedal, a pedal chain, two wheels, a drive gear set, a force switching device, a gear brake, and a resistance adjusting element. The force switching device has a switching element, a clutch wheel, a first transmission wheel, a counter wheel, and a disengaging guide groove. The gear brake has a second transmission wheel, a drive chain, a brake gear, a handbrake actuation element, and a stopper. The seat element is arranged on the frame. The drive pedal is arranged on the frame and is located on one side of the seat element. The pedal chain is connected to one side of the drive pedal and is driven by it. The wheels are arranged on both sides of the seat element. The drive gear set is connected to one side of the wheels and drives them to rotation.The power switching device is mounted on the frame and is located between the drive pedal and the drive gear set. The gear brake is mounted on the frame and is located between the power switching device and the drive gear set. The resistance adjusting element is located on the side of the frame near the drive pedal. The switching element is movably mounted on one side of the frame. The clutch gear is movably mounted on one side of the switching element via a first axle. The first transmission gear is connected to the pedal chain and mounted on the first axle. The mating gear is attached to the side of the first transmission gear facing the clutch gear. The disengagement guide groove is provided on the switching element. The second transmission gear is mounted on the side of the frame opposite the switching element via the first axle. The drive chain connects the second transmission gear and the drive gear set.The brake gear is located on one side of the drive gear set and rotates synchronously with it. The handbrake actuator is pivotally mounted on one side of the frame. The stopper is located on one side of the handbrake actuator.

[0009] When the user rides the invention like a normal bicycle, they sit on the seat and press the drive pedal to power the pedal chain. The first and second transmission gears at the two ends of the first axle drive the chain, causing the drive gear set to rotate the wheels on either side of the frame. To switch to the rehabilitation function, the user rotates the switching element of the power-shifting device. This causes the disengaging guide groove to push the clutch gear outward, disengaging the clutch gear from the mating gear. As a result, the drive pedal freewheels and cannot rotate the drive gear set. The resistance of the drive pedal can be adjusted using the resistance adjustment element to provide pedaling training of varying intensity.For safety reasons, the handbrake actuation element of the gear brake can be pulled simultaneously so that the stopper blocks the brake gear and thus locks the wheels, allowing the user to conveniently switch between the driving and rehabilitation functions. Brief description of the drawings Fig. 1 a perspective view of the first embodiment of the invention, Fig. 2 a perspective partial representation of the first embodiment of the invention, Fig. 3 an exploded view of the force switching device of the first embodiment of the invention, Fig. 4 a representation of the movement of the first embodiment of the invention, Fig. 5 a representation of the switching operation of the first embodiment of the invention (1), Fig. 6 a representation of the switching operation of the first embodiment of the invention (2), Fig. 7 a representation of the resistance setting of the first embodiment of the invention, Fig. Figure 8 shows a representation of the gear brake of the first embodiment of the invention. Ways to implement the invention

[0010] As in the Fig. As shown in 1 to 3, the invention comprises: a frame 1; a seating element 2, which is arranged on the frame 1; a drive pedal 21, which is arranged on the frame 1 and is located on one side of the seat element 2; a pedal chain 211 which is connected to and driven by one side of the drive pedal 21; two wheels 22, which are arranged on both sides of the seat element 2; a drive gear set 3 which is connected to one side of the running wheels 22 and drives them to rotate; a force switching device 4, which is arranged on the frame 1, is located between the drive pedal 21 and the drive gear set 3 and has a switching element 41 movably arranged on one side of the frame 1, a clutch wheel 43 which is movably arranged on one side of the switching element 41 via a first axle 42, a first transmission wheel 44 which is connected to the pedal chain 211 and is arranged on the first axle 42, a counter wheel 441 which is attached to the side of the first transmission wheel 44 facing the clutch wheel 43, and a separating guide groove 45 which is provided on the switching element 41 and serves to receive the clutch wheel 43 in order to engage it with the counter wheel 441, and to push the clutch wheel 43 in order to separate it from the counter wheel 441; a gear brake 5, which is arranged on the frame 1 and is located between the power switching device 4 and the drive gear set 3, and a second transmission gear 51, which is arranged via the first axle 42 on the side of the frame 1 facing away from the switching element 41, a drive chain 52, which connects the second transmission gear 51 and the drive gear set 3, a brake gear 53, which is arranged on one side of the drive gear set 3 and rotates synchronously with it, a handbrake actuating element 54, which is pivotally arranged on one side of the frame 1, and a stopper 55, which is arranged on one side of the handbrake actuating element 54 to block the brake gear 53; and a resistance adjusting element 6, which is arranged on the side of the frame 1 close to the drive pedal 21, to adjust the rotational resistance of the drive pedal 21, wherein the resistance adjusting element 6 has an operating part 61, which is arranged on one side of the frame 1, a connecting rod 62, which is arranged on one side of the operating part 61, and a pressure part 63, which is arranged at one end of the connecting rod 62, to press against the drive pedal 21.

[0011] The frame 1 is a metal frame comprising a seat support 11 for attaching the seat element 2 and a wheel carrier 12 for attaching the wheels 22. The seat element 2 has a seat section 23 attached to the seat support 11 and a backrest section 24 attached to the seat support 11, the backrest section being located on one side of the seat section 23. In this embodiment, the seat section 23 and the backrest section 24 are attached to the seat support 11 by elastic bands. The two wheels 22 are arranged together on a drive shaft 31 and are located on both sides of the wheel carrier 12. The drive pedal 21 is pivotally connected to the forward-extending section of the wheel carrier 12 and is located in front of the seat section 23. It is a conventional bicycle pedal. The pedal chain 211 is driven directly by the drive pedal 21 and is connected to the first transmission sprocket 44.The drive gear set 3 includes the drive shaft 31 and the gear section 32, which rotates synchronously with the drive shaft 31. The power switching device 4 is a mechanical structure for switching between driving mode and training mode. The switching element 41 can be a handle with a ring 411. The disengaging guide groove 45 is a gradually widening groove on the inner wall of the ring 411. The first axle 42 serves to transmit the force from the drive pedal 21 to the drive gear set 3. The first transmission gear 44 and the second transmission gear 51 are arranged at the two ends. The first transmission gear 44 is connected to the pedal chain 211, and the second transmission gear 51 is connected to the drive chain 52. The counter gear 441 is a crown gear attached to one side of the first transmission gear 44. The connection can be a one-piece connection, a buckle connection, a clamp connection, an adhesive connection, or a welded connection.The clutch gear 43 can be a crown gear that can be displaced along the first axis in the axial clearance. Its teeth and the teeth of the mating gear 441 are opposite each other and can mesh. Preferably, the first axis 42 has an elastic element 422 for pressing the clutch gear 43. The first axis 42 is hexagonal at the connection points with the second transmission gear 51 and the clutch gear 43 and thus has the effect of torque transmission. The axis 42 is cylindrical at the connection point with the mating gear 441 and thus has no effect of torque transmission. In this embodiment, a bearing 421 is additionally provided between the two. The gear brake 5 is a mechanical structure that directly limits the rotation of the drive gear set 3. The brake gear 53 itself does not mesh with any structure and is attached to the drive shaft 31 of the drive gear set 3.The handbrake actuating element 54 is a handle. The stopper 55 is a rod that is inserted into the tooth gap. The handbrake actuating element 54 and the stopper 55 form, for example, a T-shaped latch. The resistance adjusting element 6 is, for example, a two-stage pressure structure that presses against the axis of the drive pedal 21. However, the components mentioned above represent only examples of preferred embodiments. All designs with the same function fall within the scope of the present invention and are not limited to the examples mentioned above.

[0012] As in the Fig. As shown in Figures 1 to 8, the frame 1 of the present invention has approximately the shape of a wheelchair and comprises a seat 23, a backrest 24, wheels 22, and a rear wheel. Since it is versatile and can be used, for example, for sports, driving, rehabilitation, and as a walking aid, it is equipped with a drive pedal 21 and handlebars. Of course, the overall shape is not limited to that of a wheelchair. For example, the seat 2 can consist of only a seat 23 without a backrest 24. The backrest 24 allows the user to drive more comfortably and safely and does not impair the performance of subsequent functions.

[0013] As in Fig. As shown in Figure 4, when using the invention for driving or sports, the user can sit on the seat element 2 and press the drive pedal 21 to drive the drive shaft 31, causing the wheels 22 to roll forward. When the user presses the drive pedal 21 and drives the pedal chain 211, this directly causes the first transmission wheel 44 to rotate. When the clutch wheel 43 and the counter wheel 441 are engaged, the counter wheel 441, which rotates synchronously with the first transmission wheel 44, simultaneously rotates the clutch wheel 43. The clutch wheel 43 rotates the second transmission wheel 51 via the first axle 42. At this point, the first transmission wheel 44, the counter wheel 441, the clutch wheel 43, and the second transmission wheel 51 appear to rotate synchronously.The second transmission gear 51 can drive the drive chain 52, whereby the drive chain 52 rotates the gear part 32 of the drive gear set 3, so that the gear part 32 rotates the drive shaft 31 and thus the wheels 22 on both sides of the frame 1 are rotated. Therefore, the driving mode of the present invention is realized.

[0014] As in the Fig. As shown in Figures 5-6, if the user wishes to switch the invention to training or rehabilitation mode, they simply need to rotate the switching element 41 of the force switching device 4. This causes the disengaging guide groove 45 on the ring 411 on one side of the clutch wheel 43 to move along with it. Since the wall thickness of the disengaging guide groove 45 gradually increases, the side of the clutch wheel 43 rests against the narrow wall 451 of the disengaging guide groove 45 before rotation. This means that the clutch wheel 43 has sufficient clearance on the ring 411 to move closer to the mating wheel 441. As the wall thickness of the disengaging guide groove 45 on one side of the clutch wheel 43 increases due to the rotation of the switching element 41, the clutch wheel 43 is gradually pushed outwards. When the side of the clutch wheel reaches the wide wall 452 of the separating guide groove 45, the mating wheel 441 is completely separated from the clutch wheel 43.At this point, the first transmission gear 44 and the counter gear 441, driven by the pedal chain 211, can no longer rotate the clutch gear 43 and the second transmission gear 51. The first axle 42 is cylindrical (or provided with a bearing 421) at the connection point with the counter gear 441, so that the counter gear 441 alone cannot rotate the first axle 42. The running wheels 22 therefore cannot be rotated. The drive pedal 21, the pedal chain 211, and the first transmission gear 44 are in neutral. Thus, the training or rehabilitation mode of the invention is realized. To switch from the training or rehabilitation mode to the normal driving mode, the user simply needs to turn the switching element 41 in the opposite direction. The thrust movement of the wide wall 452 of the disengaging guide groove 45 onto the clutch gear 43 is canceled.The elastic element 422 on one side of the first axle 42 pushes the clutch wheel 43 inwards towards the mating wheel 441. The clutch wheel 43 and the mating wheel 441 can be connected and coupled by pressing the drive pedal 21. The elastic element 422 can be an elastic body or a compression spring that is attached to the first axle 42. In this embodiment, for example, a compression spring is used.

[0015] As in Fig. As shown in Figure 7, in training or rehabilitation mode, the resistance of the drive pedal 21 can be simultaneously adjusted by the resistance adjustment element 6 to enable pedaling training with varying intensity. In particular, the resistance adjustment element 6 of the present embodiment is, for example, a two-stage pressure structure and comprises a control element 61 on one side of the frame 1, a connecting rod 62 on one side of the control element 61, and a pressure element 63 at one end of the connecting rod 62 for pressing the drive pedal 21. In the present embodiment, the control element 61 and the connecting rod 62 form a T-shaped latch. The pressure element 63, in the form of a brake pad, is connected to the end of the connecting rod 62 and rests against the outside of the axle of the drive pedal 21.In this way, the pressure element 63 is in a resistance-free state when the user pulls the connecting rod 62 via the control element 61, thus moving the pressure element 63 away from the drive pedal 21. Conversely, when the user pushes the connecting rod 62 via the control element 61, the pressure element 63 presses against the drive pedal 21, thereby generating resistance when the drive pedal 21 is turned. Alternatively, a limiting element 64 in the form of a groove can be provided on the frame 1 to fix the position of the control element 61 and thus hold the pressure element 63 in position. Since the pressure element 63 rests against the axle bushing of the drive pedal 21 and not against the rim of the wheel, resistance can be generated at the user's force source, which produces the best physical effect.Furthermore, since the arc length of the axle bushing of the drive pedal 21 is much smaller than the arc length of the rim of the wheel 22, the friction area between the pressure part 63 and the axle bushing is much smaller than the friction area between the pressure part 63 and the wheel 22 for the same rotation range of the drive pedal 21, thus reducing the noise.

[0016] As in Fig.As shown in Figure 8, in training or rehabilitation mode, or in standby mode, the handbrake actuation element 54 of the gear brake 5 can be moved simultaneously for safety reasons, causing the stopper 55 to block the brake gear 53 and thus locking the wheels 22. When the user pulls the stopper 55 away from the brake gear 53 using the handbrake actuation element 54, the stopper 55 returns to its normal position. Conversely, when the user pushes the stopper 55 into the tooth gap of the brake gear 53 using the handbrake actuation element 54, the brake gear 53 and the drive gear set 3 cannot be rotated, thus locking the wheels 22. Alternatively, a limiting element 56 on the frame 1 can be used to fix the handbrake actuation element 54 and the stopper 55 in place, thereby ensuring the locking mechanism. In contrast to conventional brake pads, braking by the gear brake 5 is not affected by the friction of the wheels 22.Provided the stopper 55 or the brake gear 53 is undamaged, slippage is prevented. Furthermore, the blocking mechanism is rigid and insensitive to external forces. Overall, safety and stability are increased.

Claims

[1] Sports bicycle, comprehensive a frame (1); a seating element (2) which is arranged on the frame (1); a drive pedal (21) which is arranged on the frame (1) and is located on one side of the seat element (2); a pedal chain (211) which is connected to and driven by one side of the drive pedal (21); two running wheels (22) arranged on both sides of the seat element (2); a drive gear set (3) connected to one side of the running wheels (22) and driving them to rotation; a force switching device (4) arranged on the frame (1), located between the drive pedal (21) and the drive gear set (3), comprising a switching element (41) movably arranged on one side of the frame (1), a clutch wheel (43) movably arranged on one side of the switching element (41) via a first axle (42), a first transmission wheel (44) connected to the pedal chain (211) and arranged on the first axle (42), a counter wheel (441) attached to the side of the first transmission wheel (44) facing the clutch wheel (43), and a separating guide groove (45) provided on the switching element (41) for receiving the clutch wheel (43) to engage it with the counter wheel (441) and for pushing the clutch wheel (43) to separate it from the counter wheel (441); a gear brake (5) arranged on the frame (1) and located between the power switching device (4) and the drive gear set (3), a second transmission gear (51) arranged via the first axle (42) on the side of the frame (1) facing away from the switching element (41), a drive chain (52) connecting the second transmission gear (51) and the drive gear set (3), a brake gear (53) arranged on one side of the drive gear set (3) and rotating synchronously with it, a handbrake actuating element (54) pivotally arranged on one side of the frame (1), and a stopper (55) arranged on one side of the handbrake actuating element (54) to block the brake gear (53); and a resistance adjusting element (6) which is arranged on the side of the frame (1) close to the drive pedal (21) to adjust the rotational resistance of the drive pedal (21). [2] Sports bicycle according to claim 1, characterized by , that the resistance adjusting element (6) has an operating part (61) arranged on one side of the frame (1), a connecting rod (62) arranged on one side of the actuating section (61), and a pressure part (63) arranged at one end of the connecting rod (62) to press against the drive pedal (21). [3] Sports bicycle according to claim 1, characterized by , that a limiting element (56) is provided on the frame (1) to limit the stopper (55).

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