Bicycle with gearbox transmission

Abstract

A bicycle with a gearbox transmission comprises a frame, wherein the frame is an L-shaped structure, wherein the long arm portion of the L-shaped structure constitutes a crossbeam, and the short arm portion constitutes a longitudinal beam, and the front end of the crossbeam is rotatably provided with a handlebar and a front end, and the front end is connected to a front wheel through a roller group, and a seat is provided at the intersection of the crossbeam and the longitudinal beam, and the tail end of the longitudinal beam is integrally connected with a fixing ring, and a pedal ring with a pedal is provided inside the fixing ring, and a gearbox body with a speed change mechanism provided inside is connected to the rear side of the fixing ring, and the speed change mechanism is drivingly connected to the pedal ring, and a rear wheel connected to the speed change mechanism and rotating under the drive of the speed change mechanism is provided through the gearbox body. The invention is less affected by the external environment, and the transmission structure of the product is concentrated in the gearbox, which is convenient for maintenance, and avoids the embarrassing situation of dismantling the entire vehicle when one part is broken. The invention adopts gear transmission, and the transmission efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to a speed-changing bicycle, and more particularly to a bicycle with a gearbox-driven bicycle transmission. Background Art

[0002] Most speed-changing bicycles rely on the transmission chain to switch gears of different diameters to change speed, and there will be a sense of frustration during the speed change. Although this type of transmission is widely used, there are some problems. For example, there are too many gears, and for ordinary commuters to school and work, the speeds of each gear are almost unused; when switching from high gear to low gear during the uphill process, there are too many gears. When the gear speed is slow when going uphill, it is difficult to directly reach the low-speed high-torque gear, which directly affects the effort and difficulty of shifting gears. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a bicycle with a gearbox transmission bicycle transmission which can improve the problems of the existing bicycle transmission such as the sense of frustration and the difficulty of shifting.

[0004] The technical solution adopted by the present invention is: a bicycle with a gearbox transmission, including a frame, the frame is an L-shaped structure, the long arm part of the L-shaped structure constitutes a crossbeam, and the short arm part constitutes a longitudinal beam. The front end of the crossbeam is rotatably provided with a handlebar and a front end, and the front end is connected to the front wheel through a roller group. A seat is provided at the intersection of the crossbeam and the longitudinal beam. The tail end of the longitudinal beam is integrally connected with a fixing ring, and a pedal ring with a pedal is provided inside the fixing ring. The rear side of the fixing ring is connected to a gearbox body with a speed change mechanism inside. The speed change mechanism is drivingly connected to the pedal ring, and a rear wheel connected to the speed change mechanism and rotating under the drive of the speed change mechanism is provided through the gearbox body.

[0005] The bicycle with a gearbox transmission of the present invention does not need to endure the instability of a traditional external transmission and the sense of frustration during gear shifting, and can achieve zero-waiting gear shifting. The box-type transmission structure has its parts concentrated inside the box, which is less affected by the external environment. The transmission structure of the product is concentrated in the gearbox, which is convenient for maintenance and avoids the embarrassing situation of dismantling the entire vehicle when one part is broken. Secondly, gear transmission is adopted, which greatly improves the transmission efficiency. The body is designed to be streamlined, and the user's body is in a low-wind resistance posture when using it, which can increase the riding speed. The wheel is designed to have a high toughness and slightly deformable structure, which can smoothly absorb the bumps of urban roads, eliminate the need for additional shock absorption systems, and reduce the weight of the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the overall structure of a bicycle with a gearbox transmission bicycle transmission of the present invention;

[0007] Figure 2 It is a schematic diagram of the structure of the front wheel and the handlebar in the present invention;

[0008] Figure 3 yes Figure 1 Schematic diagram of the interior of the gearbox;

[0009] Figure 4 It is a schematic diagram of the structure in which the pedal ring, the speed change mechanism and the rear wheel are combined with each other in the present invention;

[0010] Figure 5 yes Figure 4 Rear view of

[0011] Figure 6 yes Figure 4 Front view of;

[0012] Figure 7 It is a schematic diagram of the exploded structure of the transmission in the present invention;

[0013] Figure 8 It is a schematic diagram of the external structure of the transmission in the present invention.

[0014] In the figure

[0015] 1: Frame 2: Front

[0016] 3: Front wheel 4: Seat

[0017] 5: Handlebar 6: Fixed ring

[0018] 7: Pedal 8: Pedal ring

[0019] 9: Gearbox body 10: Rear wheel

[0020] 11: Rear wheel guide support frame 12: Four-stage gear

[0021] 13: Third gear 14: Second gear

[0022] 15: Transmission 15.1: First planetary carrier

[0023] 15.2: Second planetary carrier 15.3: Clutch shaft

[0024] 15.4: Ratchet planetary gear 15.5: Planetary gear

[0025] 15.6: Input shaft 15.6.1: Shaft body

[0026] 15.6.2: Shaft disc 15.7: Clutch sleeve shaft

[0027] 15.8: Outer clutch plate 15.9: Inner clutch plate

[0028] 15.10: Annular spring pressure plate 15.11: Slow output ring

[0029] 15.12 Quick output ring 15.13: Input gear

[0030] 16: Roller assembly 17: Universal joint

[0031] 18: Front mounting parts DETAILED DESCRIPTION

[0032] The following is a detailed description of a bicycle with a gearbox transmission according to the present invention in conjunction with the embodiments and the accompanying drawings.

[0033] like Figure 1 , Figure 2 , Figure 3 As shown, a bicycle with a gearbox transmission comprises a frame 1, wherein the frame 1 is an L-shaped structure, wherein the long arm portion of the L-shaped structure constitutes a cross beam, and the short arm portion constitutes a longitudinal beam, and a handlebar 5 and a front end 2 are rotatably provided at the front end of the cross beam, and the front end 2 is connected to a front wheel 3 via a roller group 16, and a seat 4 is provided at the intersection of the cross beam and the longitudinal beam, and a fixing ring 6 is integrally connected to the tail end of the longitudinal beam, and a pedal ring 8 with a pedal 7 is provided inside the fixing ring 6, and a gearbox body 9 with a speed change mechanism inside is connected to the rear side of the fixing ring 6, and the speed change mechanism is drivingly connected to the pedal ring 8, and a rear wheel 10 connected to the speed change mechanism and rotating under the drive of the speed change mechanism is provided through the gearbox body 9.

[0034] The front end of the cross beam is integrally connected with a head mounting member 18 , and the lower end of the handlebar 5 passes through the front end of the cross beam and the head mounting member 18 , and is then connected to the head 2 via a universal joint 17 .

[0035] like Figure 1 , Figure 3 As shown, a rear wheel guide support frame 11 is provided on the gearbox body 9 corresponding to the rear wheel 10 for ensuring stable rotation of the rear wheel 10 under the drive of the speed change mechanism.

[0036] like Figure 4 As shown, the outer peripheral surface of the pedal ring 8 is a gear structure, and is meshedly connected with the input end of the speed change mechanism by a gear.

[0037] like Figure 1 , Figure 3 As shown, the rim on the inner periphery of the rear wheel 10 is an internal gear structure, which is meshed with the output end of the transmission mechanism by gears, and the rear wheel guide support frame 11 fixedly connected to the gearbox body 9 is located on the inner periphery of the rear wheel 10.

[0038] like Figure 3 , Figure 5 , Figure 6 As shown, the speed change mechanism includes a four-stage gear 12 meshing with the gear structure on the outer peripheral surface of the pedal ring 8, a three-stage gear 13 meshing with the four-stage gear 12, and a transmission 15 meshing with a two-stage gear 14 meshing with the three-stage gear 13. The transmission 15 meshes with the internal gear structure formed on the inner periphery of the rear wheel 10 and is used to drive the rear wheel 10 to rotate.

[0039] like Figure 7 , Figure 8As shown, the transmission 15 comprises a first planetary wheel carrier 15.1 and a second planetary wheel carrier 15.2 having the same structure and a central through hole, as well as a clutch sleeve shaft 15.3, a clutch sleeve shaft piece 15.7, an outer clutch plate 15.8, an inner clutch plate 15.9, an annular spring pressure plate 15.10, a slow output ring 15.11, and a fast output ring 15.12. The second planetary wheel carrier 15.2 and the clutch sleeve shaft piece 15.7 are sequentially sleeved on the shaft body of the clutch sleeve shaft 15.3 having the central shaft hole, wherein the clutch sleeve shaft piece 15.7 is formed on the shaft body. The first planetary wheel carrier 15.1 is fixedly connected to the clutch sleeve shaft 15.3 by a key, and three ratchet planetary wheels 15.4 are fixedly connected to the first planetary wheel carrier 15.1 at equal intervals through sliding bearings, and three planetary wheels 15.5 are fixedly connected to the second planetary wheel carrier 15.2 at equal intervals through sliding bearings. The three planetary wheels 15.5 and the three ratchet planetary wheels 15.4 are meshed with corresponding gears. The first planetary wheel carrier 15.1 is fixedly connected to the gearbox body 9 and is connected to the shaft body 15.6.1 on the side of the shaft disc 15.6.2 of the input shaft 15.6 by The outer teeth of the clutch sleeve shaft 15.7 and the inner keyway of the inner clutch plate 15.9 are connected to each other through a key, the outer clutch plate 15.8 is pressed on the inner clutch plate 15.9, the annular spring pressure plate 15.10 is pressed on the outer clutch plate 15.8, and is sleeved on the shaft body of the clutch sleeve shaft 15.3, the outer peripheral keyway of the outer clutch plate 15.8 is embedded in the inner peripheral keyway on the quick output ring 15.12 to form a key connection, and the shaft body 15.6.1 of the input shaft 15.6 located on the other side of the shaft disc 15.6.2 is penetrated. The clutch sleeve shaft 15.3 is passed through and extended out to be fixedly connected with the input gear 15.13. The slow output ring 15.11 is arranged on the side of the fast output ring 15.12 away from the input gear 15.13. The inner circumference of the slow output ring 15.11 is a tooth structure, which meshes with the ratchet planetary gear teeth in the ratchet planetary gear 15.4 and the inner circumference of the slow output ring 15.11. The outer circumferences of the slow output ring 15.11 and the fast output ring 15.12 are both external gear structures that can mesh with the internal gear structure on the inner circumference of the rear wheel 10. The overall structure of the transmission 15 can be printed out by a printer using additive manufacturing.

[0040] The working principle of a bicycle with a gearbox transmission is as follows:

[0041] The working principle of the bicycle power part is as follows: the pedal ring 8 meshes with the fourth-stage gear 12, the fourth-stage gear 12 meshes with the third-stage gear 13, the third-stage gear 13 meshes with the second-stage gear 14, and finally the power is transmitted from the second-stage gear 14 to the input shaft 15.6 of the transmission 15.

[0042] The principle of the bicycle gearbox: In the fast gear position, the annular spring pressure plate 15.10 presses the inner clutch plate 15.9 and the outer clutch plate 15.8. At this time, the power of the input shaft 15.6 is transmitted to the planetary gear 15.5 through the edge of the ratchet planetary gear 15.4, and then transmitted to the clutch sleeve shaft 15.7 by the planetary gear 15.5. The clutch sleeve shaft 15.7 is keyed to the clutch sleeve shaft 15.3, and finally the clutch sleeve shaft 15.3 drives the compressed inner clutch plate 15.9 and outer clutch plate 15.8 to be transmitted to the fast output ring 15.12. At this time, since the slow output ring 15.11 and the fast output ring 15.12 are both engaged with the internal gear of the rear wheel 10, the rear wheel 10 drives the slow output ring 15.11 to move, and the ratchet planetary gear 15.4 in the slow output ring 15.11 starts to slip; in the slow gear position, the middle part of the annular spring pressure plate 15.10 is pressed down, the inner clutch plate 15.9 and the outer clutch plate 15.8 leave each other, and the power of the input shaft 15.6 is directly transmitted to the ratchet planetary gear 15.4. Since there is no fast output ring 15.12 to drive, the ratchet planetary wheel 15.4 directly meshes with the slow output ring 15.11 to output. The output power is transmitted to the rear wheel 10 through the teeth on the outer surface of the fast output ring 15.12 or the slow output ring 15.11. In order to ensure that the rear wheel 10 is effectively meshed with the teeth on the outer surface of the fast output ring 15.12 or the slow output ring 15.11, the rear wheel 10 cooperates with the rear wheel guide support frame 11, and the rear wheel guide support frame 11 ensures the correct working position of the rear wheel 10.

Claims

1. A bicycle with a gearbox transmission, comprising a frame (1), characterized in that: The frame (1) is an L-shaped structure, wherein the long arm portion of the L-shaped structure constitutes a cross beam, and the short arm portion constitutes a longitudinal beam. A handlebar (5) and a front end (2) are rotatably provided at the front end of the cross beam, and the front end (2) is connected to a front wheel (3) via a roller group (16). A seat (4) is provided at the intersection of the cross beam and the longitudinal beam. A fixing ring (6) is integrally connected to the rear end of the longitudinal beam. A pedal ring (8) with a pedal (7) is provided inside the fixing ring (6). A gearbox body (9) having a speed change mechanism provided therein is connected to the rear side of the fixing ring (6). The speed change mechanism is drivingly connected to the pedal ring (8). A rear wheel (10) connected to the speed change mechanism and rotating under the drive of the speed change mechanism is provided outside the gearbox body (9). A rear wheel guide support frame (11) is provided on the gearbox body (9) corresponding to the rear wheel (10) and is used to ensure that the rear wheel (10) rotates stably under the drive of the speed change mechanism; The wheel rim on the inner periphery of the rear wheel (10) is an internal gear structure, which is meshedly connected with the output end of the speed change mechanism via a gear, and a rear wheel guide support frame (11) fixedly connected to the gearbox body (9) is located on the inner periphery of the rear wheel (10); The speed change mechanism comprises a four-stage gear (12) meshing with a gear structure on the outer circumference of a pedal ring (8), a three-stage gear (13) meshing with the four-stage gear (12), a two-stage gear (14) meshing with the three-stage gear (13), and a transmission (15) meshing with the two-stage gear (14); the transmission (15) meshing with an internal gear structure on the inner circumference of the rear wheel (10) and being used to drive the rear wheel (10) to rotate; The transmission (15) comprises a first planetary wheel carrier (15.1) and a second planetary wheel carrier (15.2) having the same structure and a central shaft hole, as well as a clutch sleeve shaft (15.3), a clutch sleeve shaft plate (15.7), an outer clutch plate (15.8), an inner clutch plate (15.9), an annular spring pressure plate (15.10), a slow output ring (15.11), and a fast output ring (15.12), wherein the second planetary wheel carrier (15.2) and the clutch sleeve shaft plate (15.7) are sequentially sleeved on the shaft body of the clutch sleeve shaft (15.3) having the central shaft hole, wherein the clutch sleeve shaft plate (15.7) is formed on the shaft body. The first planetary wheel carrier (15.1) is fixedly connected to the clutch sleeve shaft (15.3) by a key, three ratchet planetary wheels (15.4) are fixedly connected to the first planetary wheel carrier (15.1) via sliding bearings at equal intervals, and three planetary wheels (15.5) are fixedly connected to the second planetary wheel carrier (15.2) via sliding bearings at equal intervals, and the three planetary wheels (15.5) and the three ratchet planetary wheels (15.4) are meshedly connected with each other by corresponding gears, and the first planetary wheel carrier (15.1) is fixedly connected to the gearbox body (9) and is connected to the shaft body (15.6.1) of the input shaft (15.6) located on one side of the shaft disc (15.6.2) by a The clutch sleeve shaft (15.7) is connected by a sliding bearing, the outer teeth of the clutch sleeve shaft (15.7) and the inner keyway of the inner clutch plate (15.9) are connected to each other through a key, the outer clutch plate (15.8) is pressed on the inner clutch plate (15.9), the annular spring pressure plate (15.10) is pressed on the outer clutch plate (15.8) and sleeved on the shaft body of the clutch sleeve shaft (15.3), the outer peripheral keyway of the outer clutch plate (15.8) is embedded in the inner peripheral keyway on the quick output ring (15.12) to form a key connection, and the shaft body (15.6.1) of the input shaft (15.6) located on the other side of the shaft disc (15.6.2) is connected to the inner keyway of the quick output ring (15.12) to form a key connection. ) penetrates and extends out of the clutch sleeve shaft (15.3) and is fixedly connected to the input gear (15.13); the slow output ring (15.11) is arranged on a side of the fast output ring (15.12) away from the input gear (15.13); the inner circumference of the slow output ring (15.11) is a tooth structure; the ratchet planetary gear teeth in the ratchet planetary gear (15.4) mesh with the inner circumference of the slow output ring (15.11); and the outer circumferences of the slow output ring (15.11) and the fast output ring (15.12) are both external gear structures that can mesh with the internal gear structure on the inner circumference of the rear wheel (10).

2. A bicycle with a gearbox transmission according to claim 1, characterized in that: The front end of the cross beam is integrally connected to a vehicle head mounting member (18); the lower end of the handlebar (5) passes through the front end of the cross beam and the vehicle head mounting member (18) and is then connected to the vehicle head (2) via a universal joint (17).

3. A bicycle with a gearbox transmission according to claim 1, characterized in that: The outer peripheral surface of the pedal ring (8) is a gear structure, and is meshedly connected with the input end of the speed change mechanism via a gear.

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