CN109606524B - Spoke-free foldable bicycle - Google Patents
Spoke-free foldable bicycle Download PDFInfo
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- CN109606524B CN109606524B CN201910081000.1A CN201910081000A CN109606524B CN 109606524 B CN109606524 B CN 109606524B CN 201910081000 A CN201910081000 A CN 201910081000A CN 109606524 B CN109606524 B CN 109606524B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K15/00—Collapsible or foldable cycles
- B62K15/006—Collapsible or foldable cycles the frame being foldable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
- B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
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Abstract
The invention discloses a spoke-free foldable bicycle, which comprises a spoke-free front wheel, a foldable frame, a speed change mechanism and a spoke-free rear wheel, wherein the front wheel is connected with the front wheel through a connecting rod; the foldable frame comprises a front frame, a middle folding part and a rear frame; the front frame comprises a front fixed rigid arc shell, a front rotary rigid arc shell, two front positioning plates welded at one end of the front rotary rigid arc shell, a front base welded at the other end of the front rotary rigid arc shell, a front positioning seat welded at the middle part of the front fixed rigid arc shell, a front rigid cylinder with the bottom inserted between two front side plates of the front positioning seat and welded on the front fixed rigid arc shell, and a bowl group welded at the top of the front rigid cylinder; the first connecting pin shaft rotatably connects the two front positioning plates and the front positioning seat; the rear frame and the front frame have the same structure. After being folded, the bicycle can be attached to the spoke-free front wheel and the spoke-free rear wheel, so that the volume of the folded whole bicycle is smaller, and the volume of the folded bicycle is only the volume of the wheel and is far smaller than the volume of the folded bicycle.
Description
Technical Field
The invention belongs to the technical field of vehicles, and particularly relates to a spoke-free foldable bicycle.
Background
The bicycle is used as a general vehicle and is widely applied to the traffic aspects in various places in China. The traditional bicycle adopts chain transmission, the mechanical efficiency of the chain transmission is lower, and the chain transmission bicycle also has the defects of chain aging and falling, noise in working and the like, and needs frequent lubrication and tensioning.
The existing urban traffic is crowded, the parking of the bicycle is also a big problem, the phenomenon that the bicycle is stolen is very common, and meanwhile, the bicycle with heavier mass and large volume is inconvenient for people to carry and transport. The existing folding bicycle can only realize the folding of the frame part, and the folded volume is composed of a folded frame and wheels. With the development of the technology, a spoke-free bicycle appears, the bicycle is light and convenient, the folding of the bicycle can be realized, the volume of the folded bicycle is smaller than that of the traditional folding bicycle, but the layout of the whole bicycle is unique to that of the traditional bicycle, and only spoke-free wheels are used.
The Chinese patent application (application publication No. CN106379480A, application publication No. 2017.2.8) discloses a spoke-free transmission mechanism for a bicycle, which comprises a driving wheel assembly and a support assembly, wherein the driving wheel assembly sequentially comprises a wheel rim, an inner ring gear and a wheel rim support frame from outside to inside, the wheel rim is connected with the inner ring gear, the support assembly is connected with the driving wheel assembly, the wheel rim support frame is provided with a motor and an auxiliary gear, the auxiliary gear is meshed with the inner ring gear, and the motor is connected with the auxiliary gear. The spoke-free transmission mechanism for the bicycle drives the auxiliary gear to rotate by using the motor, the auxiliary gear is meshed with the inner ring gear to drive the rim to rotate, so that the transmission of the spoke-free mechanism is realized, the structure of the spoke-free transmission mechanism is compact, the volume is small, and the weight of the bicycle can be reduced. The bicycle is driven by a motor to be heavy and occupy space, only can be folded by a frame part, and the folded volume is also composed of a folded frame and wheels.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned drawbacks, and an object of the present invention is to provide a spoke-free foldable bicycle that is smaller in size and capable of changing speed after being folded.
In order to achieve the purpose, the invention designs a spoke-free foldable bicycle, which comprises a spoke-free front wheel, a foldable frame, a speed change mechanism and a spoke-free rear wheel; the foldable frame comprises a front frame, a middle folding part and a rear frame;
the front frame comprises a front fixed rigid arc shell, a front rotary rigid arc shell, two front positioning plates welded at one end of the front rotary rigid arc shell, a front base welded at the other end of the front rotary rigid arc shell, a front positioning seat welded at the middle part of the front fixed rigid arc shell, a front rigid cylinder with the bottom inserted between two front side plates of the front positioning seat and welded on the front fixed rigid arc shell, and a bowl group welded at the top of the front rigid cylinder; the first connecting pin shaft rotatably connects the two front positioning plates and the front positioning seat;
the rear frame comprises a rear rigid ring, a rear fixed rigid arc shell, a rear rotating rigid arc shell, two rear positioning plates welded at one end of the rear rotating rigid arc shell, a rear base welded at the other end of the rear rotating rigid arc shell, a rear positioning seat welded at the middle part of the rear fixed rigid arc shell and a rear rigid cylinder, wherein the bottom of the rear rigid cylinder is inserted between the two rear side plates of the rear positioning seat and welded on the rear fixed rigid arc shell; and the third connecting pin shaft rotatably connects the two rear positioning plates and the rear positioning seat.
Further, the speed change mechanism comprises a rigid cage and a speed change gear train, and a wing plate at the lower end of the rigid cage is fixed on the rear frame;
the speed change gear train comprises a speed increase gear, an input gear meshed with the speed increase gear, a plurality of speed change gear sets and an output gear, wherein each speed change gear set comprises a spline with a hole, a primary speed change gear and a secondary speed change gear meshed with the primary speed change gear; each perforated spline comprises a circular thin plate, a spline arranged in the middle of the surface of the circular thin plate, a spline shaft hole formed in the center of the surface of the circular thin plate and a spline groove on the circumferential surface of the spline shaft hole; the middle part of each primary speed change gear is provided with a key hole matched with the spline, and the center part of the key hole is provided with a gear shaft hole penetrating through the primary shaft; the one-level epaxial direction parallel key that is equipped with the number and change gear group cover number and equals, the one end of one-level axle all passes input gear's centre shaft hole, every change gear group's foraminiferous spline shaft hole and one-level change gear shaft hole, the one end of second grade axle all passes output gear's centre shaft hole, every change gear group's second grade change gear, just keyway and the cooperation of direction parallel key on the foraminiferous spline.
Further, the intermediate folded portion comprises a front steel and a rear steel; the outside extension of one end edge level of front steel has preceding circular boss, the outside level extension of one end upper surface edge of rear steel has circular boss, rear steel's one end lower surface edge of back circular boss down after the outside level extension of level has, and leaves the circular boss male clearance before supplying between the circular boss of back lower round boss, and second connecting pin axle rotates front steel and rear steel to be connected, just the other end of rear steel is fixed on the rigidity cylinder of back, the U type groove of installing with the cooperation of bowl group is seted up to the other end of front steel.
Furthermore, the spoke-free front wheel comprises a front steel ring, a front tire and a round platform with a shaft hole, wherein the peripheral surfaces of two sides of the front steel ring are respectively provided with a circle of groove for accommodating the round platform with the shaft hole, and the number of the round platforms with the shaft hole of the peripheral surface groove on one side of the front steel ring is the same as that of the round platforms with the shaft hole of the peripheral surface groove on the other side of the front steel ring and is arranged symmetrically one by one; the circular table with the shaft hole of the spoke-free front wheel is positioned on the front wheel positioning hole of the rigid circular arc shell through a shaft, and the small end face of the circular table with the shaft hole is abutted to the inner surface of the groove.
Furthermore, the spoke-free rear wheel comprises a rear steel ring, a rear tire and a plurality of positioning gears, a circle of inside engaged gears is arranged on a boss on the circular inner wall of the rear steel ring, gear positioning plates on two sides of each positioning gear clamp the boss of the rear steel ring, and an outside engaged gear in the middle of each positioning gear is engaged with the inside engaged gear of the rear steel ring; and each positioning gear is connected with the rear fixing hole of the rear rigid circle in a positioning way through a gear shaft.
Compared with the prior art, the invention has the following advantages:
1. the folded spoke-free foldable bicycle can be attached to a spoke-free front wheel and a spoke-free rear wheel after being folded, so that the folded whole bicycle has smaller volume, and the folded volume is only the volume of the wheel and is far smaller than the folded volume of the traditional bicycle;
2. the bicycle speed change mechanism is arranged in the inner ring of the spokeless rear wheel, and the space in the spokeless rear wheel is fully utilized, so that the length of the whole frame is reduced by one third compared with the length of the traditional bicycle;
3. the whole bicycle is driven by using a gear, so that the structure is simple, the work is reliable, the efficiency is higher than that of the traditional chain transmission, the mechanical efficiency of bicycle movement is improved, and the problems of aging and falling of a chain, noise and frequent lubrication and tensioning are avoided; the invention uses the perforated spline and the guide flat key to connect the power shaft and the gears with different gears, so that the volume is smaller and lighter, and the whole speed change mechanism is positioned with the rear frame through the positioning pin, so that the speed change mechanisms with different speed ratio coefficients can be conveniently replaced, instead of the traditional fixed speed ratio coefficient.
Drawings
FIG. 1 is a schematic structural view of a spokeless foldable bicycle of the present invention;
FIG. 2 is a schematic illustration of the front spoke-free wheel of FIG. 1;
FIG. 3 is a schematic cross-sectional view of FIG. 2;
FIG. 4 is a schematic view of the circular truncated cone with a shaft hole in FIG. 2;
FIG. 5 is a schematic view of the mounting of the circular table with axial holes;
FIG. 6 is a schematic structural view of the foldable frame of FIG. 1;
FIG. 7 is a schematic structural view of the front frame of FIG. 6;
FIG. 8 is a schematic view of FIG. 7 in a folded state;
FIG. 9 is a schematic view of the expanded state of FIG. 7;
FIG. 10 is a schematic view of the intermediate folded portion of FIG. 6;
FIG. 11 is a schematic view of FIG. 10 in a folded state;
FIG. 12 is a schematic structural view of the rear frame of FIG. 6;
FIG. 13 is a schematic structural view of the portion of the rear wheel shown in FIG. 1 without spokes;
FIG. 14 is a schematic view of the transmission of FIG. 1;
FIG. 15 is a schematic illustration of the gear change train configuration of FIG. 14;
FIG. 16 is a schematic view of the apertured spline configuration of FIG. 15;
FIG. 17 is a schematic view of the one-stage ratio gear configuration of FIG. 15;
fig. 18 is a schematic view of a primary shaft mounting structure of fig. 15.
The components in the figures are numbered as follows:
the wheel comprises a spoke-free front wheel 10, a front steel ring 11, a front tire 12, a groove 13, a round table 14 with a shaft hole, a small end face 15 and an inner surface 16;
the foldable frame 20, the front frame 21 (wherein: the front fixed rigid arc shell 211, the front positioning plate 212, the front rotary rigid arc shell 213, the front rigid cylinder 214, the front positioning seat 215, the bowl group 216, the front base 217, the front wheel positioning hole 218), the middle folding part 22 (wherein: the front square steel 221, the rear steel 222, the front circular boss 223, the rear upper circular boss 224, the rear lower circular boss 225, the gap 226, the U-shaped groove 227), the rear frame 23 (wherein: the rear base 231, the rear rigid cylinder 232, the rear fixed rigid arc shell 233, the rear rigid circle 234, the rear fixing hole 2341, the rear positioning seat 235, the rear rotary rigid arc shell 236, the rear positioning plate 237);
a speed change mechanism 30, a speed change gear train 31, a rigid cage 32 (wherein: a wing plate 321), a speed-up gear 33 (wherein: a main gear 331, a secondary gear 332), an input gear 34, a primary speed change gear 35 (wherein: a key hole 351, a gear shaft hole 352), a perforated spline 36 (wherein: a circular thin plate 361, a spline 362, a key groove 363, a spline shaft hole 364), a secondary speed change gear 37, an output gear 38;
a spokeless rear wheel 40 (wherein, a rear steel ring 41, a rear tyre 42, a positioning gear 43, a boss 44, an inner gear 45, a gear shaft 46 and a gear positioning plate 47);
a primary shaft 50 (wherein: a guide flat key 51), a secondary shaft 60;
the front first pin hole A1, the front second pin hole A2, the front first positioning hole B1, the front second positioning hole B2, the front third positioning hole B3, the front first positioning hole C1, the front second positioning hole C2, the front third positioning hole C3, the first connecting hole D1, the rear upper second connecting hole D2, the rear upper third connecting hole D3, the rear first pin hole E1, the rear second pin hole E2, the rear first positioning hole F1, the rear second positioning hole F2 and the rear third positioning hole F3.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
Fig. 1 shows a spokeless foldable bicycle comprising a spokeless front wheel 10, a foldable frame 20, a shifting mechanism 30 and a spokeless rear wheel 40.
As shown in fig. 2, 3 and 4, the spoke-free front wheel 10 includes a front rim 11, a front tire 12 and a circular platform with an axial hole 14, wherein a circle of grooves 13 for accommodating the circular platform with an axial hole 14 are respectively formed on the peripheral surfaces of both sides of the front rim 11, and the number of the circular platforms with an axial hole 14 of the grooves 13 on the peripheral surface of one side of the front rim 11 is the same as the number of the circular platforms with an axial hole 14 of the grooves 13 on the peripheral surface of the other side of the front rim 11 and is arranged symmetrically one by one.
As shown in fig. 6, the foldable frame 20 includes a front frame 21, a middle folding portion 22, and a rear frame 23. As shown in fig. 7, the front frame 21 includes a front fixed rigid arc shell 211, a front rotating rigid arc shell 213, two front positioning plates 212 welded to one end of the front rotating rigid arc shell 213, a front base 217 welded to the other end of the front rotating rigid arc shell 213, a front positioning seat 215 welded to the middle of the front fixed rigid arc shell 211, a front rigid cylinder 214 with the bottom inserted between the two front side plates of the front positioning seat 215 and welded to the front fixed rigid arc shell 211, and a bowl group 216 welded to the top of the front rigid cylinder 214; wherein, a preceding locating plate 212 welding rotates rigidity arc shell 213 one end side in the front, another preceding locating plate 212 welding rotates rigidity arc shell 213 one end another side in the front, two preceding locating plates 212 are along preceding rigidity arc shell 213 central plane symmetrical arrangement, and all seted up preceding first pinhole A1 and preceding second pinhole A2 on two preceding locating plates 212 and be the one-to-one and arrange, and on the same reason, preceding first locating hole B1 has all been seted up on two blocks of curb plates of preceding location seat 215, preceding second locating hole B2, preceding third locating hole B3 just is the one-to-one and arranges. The front positioning seat 215 is inserted between the two front positioning plates 212, and the first connecting pin shaft is sequentially inserted into a front second pin hole a2 on one front positioning plate 212, a front third positioning hole B3 on the front positioning seat 215, and a front second pin hole a2 on the other front positioning plate 212, so as to rotatably connect the front rotating rigid arc shell 213 with the front positioning seat 215; when the front frame 21 is folded, the front rotary rigid arc shell 213 rotates around the third positioning hole B3 on the front positioning seat 215 through the front second pin hole a2 on the front positioning plate 212; in a folded state, the front rotating rigid arc shell 213 is attached to the front fixed rigid arc shell 211, and the front first pin hole a1 is aligned with the front second positioning hole B2 and is positioned by a pin to prevent rotation, as shown in fig. 8; in the deployed state, the forward first pin aperture a1 is aligned with and pinned to the forward first registration aperture B1, as shown in fig. 9; the front frame 21 rotates left and right through the holes on the bowl group 216 so as to realize the steering of the vehicle. In this embodiment, the front rotating rigid arc housing 211 is used to position the front wheels, and the arc of the front rotating rigid arc housing 211 is greater than 80 degrees for reasonable force.
In addition, as shown in fig. 5, the circular truncated cone with axle hole 14 of the spotless front wheel 10 is positioned on the front wheel positioning hole 218 of the rigid circular arc shell 211 through an axle, and the small end surface 15 of the circular truncated cone with axle hole 14 is abutted against the inner surface 16 of the groove 13, so that the left side and the right side of the spotless front wheel 10 are symmetrical, the upper circumferential surface and the lower circumferential surface of the groove 13 are matched with the circumferential surface of the circular truncated cone with axle hole 14, so that the upper and the lower positioning of the spotless front wheel 10 are realized, and the circular truncated cone with axle hole 14 rotates around the axle in the groove 13 of the front steel ring 11, so that the spotless front wheel 10 moves.
As shown in fig. 10, the intermediate folded part 22 includes a front steel 221 and a rear steel 222. A front circular boss 223 extends horizontally outwards from the edge of one end of the front steel 221, a rear upper circular boss 224 extends horizontally outwards from the edge of the upper surface of one end of the rear steel 222, a rear lower circular boss 225 extends horizontally outwards from the edge of the lower surface of one end of the rear steel 222, and a gap for the front circular boss 223 to insert is reserved between the rear upper circular boss 224 and the rear lower circular boss 225; meanwhile, the front circular boss 223 is provided with a front first positioning hole C1, a front second positioning hole C2 and a front third positioning hole C3, the rear upper circular boss 224 is provided with a rear upper first connecting hole D1, a rear upper second connecting hole D2 and a rear upper third connecting hole D3, correspondingly, the rear lower circular boss 225 is provided with a rear lower first connecting hole, a rear lower second connecting hole and a rear lower third connecting hole (no reference numeral is given in the drawing) which are arranged in one-to-one correspondence with the rear upper first connecting hole D1, the rear upper second connecting hole D2 and the rear upper third connecting hole D3, the front circular boss 223 is inserted into a gap 226 between the rear upper circular boss 224 and the rear lower circular boss 225, and the second connecting pins are sequentially inserted into the rear upper first connecting hole D1, the front first positioning hole C1 and the rear lower first connecting hole so as to rotatably connect the front steel and the rear steel. When folded, the rear frame 23 rotates 90 degrees around the second connecting pin, the front frame 21 rotates around the second connecting pin and is aligned with the rear frame, the front second positioning hole C2 is aligned with the rear upper third connecting hole D3 and the rear lower first connecting hole, and the pin is inserted, so that the rotation is prevented as shown in figure 11 (top view); when the bicycle is unfolded, the front steel 221 and the rear frame are positioned on the same plane, and the front second positioning hole C2 is aligned with the rear upper second connecting hole D2 and the rear lower second connecting hole and is inserted with a pin to prevent rotation.
As shown in fig. 12, the rear frame 23 includes a rear rigid ring 234, a rear fixed rigid arc shell 233, a rear rotating rigid arc shell 236, two rear positioning plates 237 welded to one end of the rear rotating rigid arc shell 233, a rear base 231 welded to the other end of the rear rotating rigid arc shell 233, a rear positioning seat 235 welded to the middle of the rear fixed rigid arc shell 233, and a rear rigid cylinder 232 having a bottom inserted between two rear side plates of the rear positioning seat 235 and welded to the rear fixed rigid arc shell 233; wherein, a back locating plate 237 welds in the one end side face of the rigid circular arc shell 236 of rotation in back, another back locating plate 237 welds in the another side face of the rigid circular arc shell 236 one end of rotation in back, two back locating plates 237 are along the rigid circular arc shell 236 central plane symmetrical arrangement in back, and two back locating plates 237 have all been seted up back first pinhole E1 and back second pinhole E2 and have been the one-to-one and arrange, and on the same reason, back first locating hole F1 has all been seted up on two blocks of curb plates of back locating seat 235, back second locating hole F2, back third locating hole F3 just is the one-to-one and arranges. The rear positioning seat 235 is inserted between the two rear positioning plates 237, and the third connecting pin shaft is sequentially inserted into a rear second pin hole E2 on one rear positioning plate 237, a rear third positioning hole F3 on the rear positioning seat 235 and a rear second pin hole on the other rear positioning plate 237 so as to rotatably connect the rear rotating rigid arc shell 236 with the rear positioning seat 235; when the rear frame 23 is folded, the rear rotating rigid arc casing 236 rotates around the rear third positioning hole F3 on the rear positioning seat 235 through the rear second pin hole E2 on the rear positioning plate 237; in a folded state, the rear rotating rigid arc shell 236 is attached to the rear fixed rigid arc shell 233, and the rear first pin hole E1 is aligned with the rear second positioning hole F2 and is positioned by a pin to prevent rotation; in the deployed state, the rear first pin hole E1 is aligned with and pinned to the rear first locating hole F1; in this embodiment, the rear rotating rigid arc case 233 is used to position the front wheel, and the arc of the rear rotating rigid arc case 233 is greater than 80 degrees for reasonable force.
In addition, the other end of the rear steel 222 is fixed on the rear rigid column 232, and the other end of the front steel 221 is provided with a U-shaped groove 227 which is matched with the bowl group 216, so that the front frame and the rear frame are installed and connected through the middle folding part. Meanwhile, the middle width of the rear rigid circle 234 is larger than the width of the spoke-free rear wheel, and a plurality of rear fixing holes 2341 which are used for positioning the spoke-free rear wheel and are uniformly distributed along the circumference are arranged on the side surface of the rear rigid circle 234.
The invention can be jointed with the front wheel and the rear wheel after folding, to reduce the volume of the folded bicycle.
As shown in fig. 13, the spokeless rear wheel 40 includes a rear rim 41, a rear tire 42 and a plurality of positioning gears 43, a circle of inner ring gear 45 is arranged on a circular inner wall boss 44 of the rear rim 41, gear positioning plates 47 on two sides of the positioning gears 43 clamp the boss 44 of the rear rim 41, and an outer ring gear in the middle of the positioning gears 43 is meshed with the inner ring gear 45 of the rear rim 41. The number of the rear fixing holes 2341 is the same as that of the positioning gears 43, and each positioning gear 43 is connected with the rear fixing hole 2341 in a positioning mode through the gear shaft 46, so that the spoke-free rear wheel is positioned as shown in fig. 15.
The transmission mechanism 30 shown in fig. 14 includes a rigid cage 32 and a change gear train 31, and the entire transmission mechanism is fixed to the rear frame via a flange 321 at the lower end of the rigid cage 32. The bicycle speed change mechanism is arranged in the inner ring of the spokeless rear wheel 40, and the space in the spokeless rear wheel 40 is fully utilized, so that the length of the whole bicycle frame is reduced by one third compared with the length of the traditional bicycle.
As shown in fig. 15, the change gear train 31 includes a speed-up gear 33, an input gear 34, a plurality of sets of change gear sets and an output gear 38, wherein the speed-up gear 33 includes a main gear 331 and a sub-gear 332, the shaft of the sub-gear 332 passes through the central shaft hole of the main gear 331, the sub-gear 332 is engaged with the driving gear 311 to input power to the change gear, and the main gear 331 is engaged with the input gear 34 to realize speed-up and transmit power to the change gear sets.
Each set of speed change gear set comprises a perforated spline 36, a primary speed change gear 35 and a secondary speed change gear 37 meshed with the primary speed change gear 35, and the number of teeth of the primary speed change gear 35 of each set of speed change gear set is different so as to realize speed change; as shown in fig. 16, each of the perforated splines 36 includes a circular thin plate 361, a spline 362 provided in the middle of the surface of the circular thin plate 361, a spline shaft hole 364 provided in the center of the surface of the circular thin plate 361, and a spline groove 363 on the circumference of the spline shaft hole 364; as shown in fig. 17, a key hole 351 matched with the spline 362 with the hole is formed in the middle of each primary speed change gear 35, the thickness of the key hole 351 is half of that of the primary speed change gear, a gear shaft hole 352 penetrating through the primary shaft 50 is formed in the center of the key hole 351, and the primary speed change gear 35 is installed in a matched manner with the spline 36 with the hole through the key hole 351; meanwhile, as shown in fig. 18, the number of the guiding flat keys 51 equal to the number of the sets of the speed change gear sets are arranged on the primary shaft 50, one end of the primary shaft 50 passes through the central shaft hole of the input gear 34, the spline shaft hole 361 of the perforated spline 36 of each set of the speed change gear sets and the gear shaft hole 352 of the primary speed change gear 35, one end of the secondary shaft 60 passes through the central shaft hole of the output gear 38 and the secondary speed change gear 37 of each set of the speed change gear sets, and the key groove 363 on the perforated spline 36 is matched with the guiding flat key 51, so that the perforated spline can slide left and right on the guiding flat key.
During operation, the input gear 34 inputs power into the primary shaft 50 through keys, the power is transmitted to the secondary speed change gear 37 through the primary speed change gear 35 on the primary shaft 50, the secondary speed change gear 37 transmits the power into the secondary shaft 60 through keys, and the output gear is a gear with the same module as the internal gear 45 on the spokeless rear wheel 40 and meshed with the internal gear 45, so that the secondary shaft 60 drives the output gear 38 to output the power to the spokeless rear wheel 40. The whole bicycle is driven by using a gear, so that the structure is simple, the work is reliable, the efficiency is higher than that of the traditional chain transmission, the mechanical efficiency of bicycle movement is improved, and the problems of aging and falling of a chain, noise and frequent lubrication and tensioning are avoided; the invention uses the perforated spline and the guide flat key to connect the power shaft and the gears with different gears, so that the volume is smaller and lighter, and the whole speed change mechanism is positioned with the rear frame through the positioning pin, so that the speed change mechanisms with different speed ratio coefficients can be conveniently replaced, instead of the traditional fixed speed ratio coefficient.
When the speed is changed, the rider drives the circular thin plate 361 with the perforated spline 36 to move through the brake cable, so that the circular thin plate 361 drives the perforated spline 36 to slide left and right on the guide flat key 51. The first-stage speed change gear 35 rotates freely without being influenced by the first-stage shaft 50, and the perforated spline 36 rotates together with the first-stage shaft 50 through the key groove 363; during speed change, in the speed change gear set A with the previous speed ratio coefficient, the perforated spline 36A is driven to slide to the left, the perforated spline is disengaged from the corresponding first-stage speed change gear 35A, the first-stage speed change gear 35A loses power, and the speed change gear set A stops working. In the speed change gear set B with the required ratio coefficient, the perforated spline 36B is driven by the brake cable to slide rightward, and is meshed with the corresponding primary speed change gear 35B, transmitting power into the primary speed change gear 35B, and then driving the secondary speed change gear 37B.
Claims (2)
1. A spoke-free foldable bicycle comprises a spoke-free front wheel, a foldable frame, a speed change mechanism and a spoke-free rear wheel; the method is characterized in that: the foldable frame comprises a front frame, a middle folding part and a rear frame;
the front frame comprises a front fixed rigid arc shell, a front rotary rigid arc shell, two front positioning plates welded at one end of the front rotary rigid arc shell, a front base welded at the other end of the front rotary rigid arc shell, a front positioning seat welded at the middle part of the front fixed rigid arc shell, a front rigid cylinder with the bottom inserted between two front side plates of the front positioning seat and welded on the front fixed rigid arc shell, and a bowl group welded at the top of the front rigid cylinder; the first connecting pin shaft rotatably connects the two front positioning plates and the front positioning seat;
the rear frame comprises a rear rigid ring, a rear fixed rigid arc shell, a rear rotating rigid arc shell, two rear positioning plates welded at one end of the rear rotating rigid arc shell, a rear base welded at the other end of the rear rotating rigid arc shell, a rear positioning seat welded at the middle part of the rear fixed rigid arc shell and a rear rigid cylinder, wherein the bottom of the rear rigid cylinder is inserted between the two rear side plates of the rear positioning seat and welded on the rear fixed rigid arc shell; the third connecting pin shaft rotatably connects the two rear positioning plates and the rear positioning seat;
the speed change mechanism comprises a rigid cage and a speed change gear train, and a wing plate at the lower end of the rigid cage is fixed on the rear frame;
the speed change gear train comprises a speed increase gear, an input gear meshed with the speed increase gear, a plurality of speed change gear sets and an output gear, wherein each speed change gear set comprises a spline with a hole, a primary speed change gear and a secondary speed change gear meshed with the primary speed change gear; each perforated spline comprises a circular thin plate, a spline arranged in the middle of the surface of the circular thin plate, a spline shaft hole formed in the center of the surface of the circular thin plate and a spline groove on the circumferential surface of the spline shaft hole; the middle part of each primary speed change gear is provided with a key hole matched with the spline, and the center part of the key hole is provided with a gear shaft hole penetrating through the primary shaft; the number of the guide flat keys is equal to the number of the sets of the speed change gear sets, one end of the primary shaft penetrates through a central shaft hole of the input gear, a spline shaft hole of a spline with a hole of each set of the speed change gear sets and a gear shaft hole of the primary speed change gear, one end of the secondary shaft penetrates through a central shaft hole of the output gear and a secondary speed change gear of each set of the speed change gear sets, and a key groove on the spline with the hole is matched with the guide flat keys;
the spoke-free front wheel comprises a front steel ring, a front tire and a round platform with a shaft hole, wherein the peripheral surfaces of two sides of the front steel ring are respectively provided with a circle of grooves for accommodating the round platform with the shaft hole, and the number of the round platforms with the shaft hole, which are arranged on the peripheral surface of one side of the front steel ring, is the same as the number of the round platforms with the shaft hole, which are arranged on the peripheral surface of the other side of the front steel ring in a one-to-one symmetrical; the circular table with the shaft hole of the spoke-free front wheel is positioned on the front wheel positioning hole of the rigid circular arc shell through a shaft, and the small end face of the circular table with the shaft hole is abutted against the inner surface of the groove;
the spoke-free rear wheel comprises a rear steel ring, a rear tire and a plurality of positioning gears, a circle of inside engaged gears is arranged on a circular inner wall boss of the rear steel ring, gear positioning plates on two sides of each positioning gear clamp the boss of the rear steel ring, and an outside engaged gear in the middle of each positioning gear is engaged with the inside engaged gear of the rear steel ring; each positioning gear is connected with the rear fixing hole of the rear rigid circle in a positioning mode through a gear shaft;
the radian of the front rotating rigid arc shell is more than 80 degrees, and the radian of the rear rotating rigid arc shell is more than 80 degrees;
when the front frame is folded, the front rotary rigid arc shell rotates around a third positioning hole B3 on the front positioning seat through a front second pin hole A2 on the front positioning plate; when the rear frame is folded, the rear rotating rigid arc shell rotates around a rear third positioning hole F3 on the rear positioning seat through a rear second pin hole E2 on the rear positioning plate; when the rigid circular arc shell is folded, the rear rotating rigid circular arc shell is attached to the rear fixing rigid circular arc shell, and the rear first pin hole E1 is aligned with the rear second positioning hole F2 and is positioned through a pin to prevent rotation.
2. The spokeless foldable bicycle of claim 1, wherein: the middle folding part comprises front steel and rear steel; the outside extension of one end edge level of front steel has preceding circular boss, the outside level extension of one end upper surface edge of rear steel has circular boss, rear steel's one end lower surface edge of back circular boss down after the outside level extension of level has, and leaves the circular boss male clearance before supplying between the circular boss of back lower round boss, and second connecting pin axle rotates front steel and rear steel to be connected, just the other end of rear steel is fixed on the rigidity cylinder of back, the U type groove of installing with the cooperation of bowl group is seted up to the other end of front steel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910081000.1A CN109606524B (en) | 2019-01-28 | 2019-01-28 | Spoke-free foldable bicycle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910081000.1A CN109606524B (en) | 2019-01-28 | 2019-01-28 | Spoke-free foldable bicycle |
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| CN109606524A CN109606524A (en) | 2019-04-12 |
| CN109606524B true CN109606524B (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910081000.1A Active CN109606524B (en) | 2019-01-28 | 2019-01-28 | Spoke-free foldable bicycle |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2563292B (en) * | 2017-06-10 | 2019-12-18 | Rallings Alan | Foldable bicycle |
| CN111619721B (en) * | 2020-06-10 | 2021-12-28 | 江苏盛誉动力科技有限公司 | Novel electric two-wheeled vehicle |
| JP7242152B1 (en) * | 2022-09-22 | 2023-03-20 | スノー スオ | Rotation retention mechanism for foldable wheel and bicycle provided with the same |
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| GB2426962A (en) * | 2005-06-06 | 2006-12-13 | Mark Sinclair | Foldable cycle |
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| EP2842858A1 (en) * | 2013-08-27 | 2015-03-04 | Mando Corporation | A foldable electric bicycle and control method thereof |
| CN106379480A (en) * | 2016-09-18 | 2017-02-08 | 深圳市顾美科技有限公司 | Spoke-free transmission mechanism for bicycle and bicycle |
| CN106428389A (en) * | 2016-07-22 | 2017-02-22 | 黄建 | Stepping type no-chain no-middle-shaft infinitely-variable-speed folding bicycle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004017954A (en) * | 2002-06-19 | 2004-01-22 | Eizaburo Murakami | Portable bicycle |
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2019
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| GB2426962A (en) * | 2005-06-06 | 2006-12-13 | Mark Sinclair | Foldable cycle |
| CN101130381A (en) * | 2006-08-22 | 2008-02-27 | 张明亮 | Housing gear speed variator and foldable bicycle |
| EP2842858A1 (en) * | 2013-08-27 | 2015-03-04 | Mando Corporation | A foldable electric bicycle and control method thereof |
| CN106428389A (en) * | 2016-07-22 | 2017-02-22 | 黄建 | Stepping type no-chain no-middle-shaft infinitely-variable-speed folding bicycle |
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| CN109606524A (en) | 2019-04-12 |
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