CN115432102B - Continuously variable transmission mechanism, speed change hub and vehicle - Google Patents
Continuously variable transmission mechanism, speed change hub and vehicle Download PDFInfo
- Publication number
- CN115432102B CN115432102B CN202211229759.8A CN202211229759A CN115432102B CN 115432102 B CN115432102 B CN 115432102B CN 202211229759 A CN202211229759 A CN 202211229759A CN 115432102 B CN115432102 B CN 115432102B
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- gear
- ring
- assembly
- shaft
- continuously variable
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Classifications
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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
- B62M11/06—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with spur gear wheels
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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
- B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
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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
- B62M15/00—Transmissions characterised by use of crank shafts and coupling rods
Abstract
The invention discloses a stepless speed change mechanism, a speed change hub and a vehicle, and relates to the field of transmission devices. The key points of the technical scheme include a crank rocker assembly and a rotary radius adjusting assembly; the crank rocker assembly comprises a crank guide groove, a driving shaft, a positioning shaft seat, a connecting rod and a rocker gear assembly connected with the unidirectional gear transmission assembly; one end of the connecting rod is hinged with the rocker gear assembly, and the other end of the connecting rod is sleeved on the driving shaft; one end of the driving shaft is embedded in the crank guide groove, and the other end of the driving shaft is connected with the positioning shaft seat; the crank guide groove and the positioning shaft seat comprise a rotation central axis which is coincident; the crank guide groove receives the torque of the input assembly and drives the driving shaft to revolve around the rotation central axis; the rotation radius adjusting assembly can control the driving shaft to move in the radial direction so as to adjust the revolution radius of the driving shaft. The invention can optimize the axial dimension, thereby being convenient for being mounted on a vehicle, realizing stepless speed change in the riding process and optimizing the riding experience.
Description
Technical Field
The invention relates to the field of transmission devices, in particular to a stepless speed change mechanism, a speed change hub and a vehicle.
Background
The prior Chinese patent with the publication number of CN104179908B discloses a stepless speed changer, which comprises an input part, an output shaft, a crank-rocker structure, a unidirectional rotation preventing mechanism and a rotation radius adjusting mechanism; wherein the output shaft has a rotation center axis parallel to the rotation center axis of the input portion.
However, the input shaft and the output shaft of the continuously variable transmission are arranged in parallel, so that the continuously variable transmission cannot be used as a shift drum in a bicycle (e.g., a bicycle, an electric power assisted bicycle, a tricycle, etc.) by being mounted on the rear wheel of the bicycle. Moreover, the structure of the rotary radius adjusting mechanism makes the axial dimension of the continuously variable transmission larger, which is unfavorable for optimizing the axial dimension to match the frame dimension of the riding vehicle.
Disclosure of Invention
Aiming at the defects of the prior art, one of the purposes of the invention is to provide a stepless speed change mechanism which can optimize the axial dimension, thereby being convenient to be mounted on a vehicle, realizing stepless speed change in the riding process and optimizing the riding experience.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a continuously variable transmission mechanism comprising:
the first support component and the second support component are fixedly connected;
an input assembly carried on the first support member;
an output assembly carried on the second support member;
a crank and rocker assembly carried between the first and second support members;
a unidirectional gear transmission assembly carried between the first and second support members for transmitting torque of the crank and rocker assembly to an output assembly; the method comprises the steps of,
a radius of rotation adjustment assembly;
the crank rocker assembly comprises a crank guide groove, a driving shaft, a positioning shaft seat, a connecting rod and a rocker gear assembly connected with the unidirectional gear transmission assembly; one end of the connecting rod is hinged with the rocker gear assembly, and the other end of the connecting rod is sleeved on the driving shaft; one end of the driving shaft is embedded in the crank guide groove, and the other end of the driving shaft is connected with the positioning shaft seat;
the crank guide groove and the positioning shaft seat comprise a rotation central axis which is coincident;
the crank guide groove receives the torque of the input assembly and drives the driving shaft to revolve around the rotation central axis;
the rotation radius adjusting assembly can control the driving shaft to move in the radial direction so as to adjust the revolution radius of the driving shaft.
Further, the rotating radius adjusting assembly comprises an adjusting outer ring capable of moving along the rotating central axis, and an adjusting connecting rod is hinged between the driving shaft and the adjusting outer ring; and the side wall of the positioning shaft seat is provided with a positioning guide groove matched with the driving shaft.
Further, a positioning sliding block hinged with the adjusting connecting rod is arranged at the end part of the driving shaft, and a positioning sliding groove matched with the positioning sliding block is arranged in the positioning shaft seat.
Further, the rotating radius adjusting assembly further comprises a screw rod which is in rolling bearing with the second supporting component, and an adjusting screw sleeve connected with the adjusting outer ring is sleeved on the screw rod; the adjusting outer ring can rotate relative to the adjusting screw sleeve, and the adjusting screw sleeve can drive the adjusting outer ring to axially move.
Further, a retainer and balls are arranged between the adjusting outer ring and the adjusting screw sleeve.
Further, the outer side wall of the adjusting outer ring is fixedly provided with a hinge seat matched with the adjusting connecting rod.
Further, the adjusting outer ring and the hinging seat are integrally formed.
Further, a bearing is arranged between the lead screw and the positioning shaft seat.
Further, the positioning shaft seat is fixedly connected with a positioning ring, and the positioning ring is in rolling bearing with the second supporting component.
Further, the rotating radius adjusting assembly further comprises a planetary gear driving assembly for controlling the rotation of the screw.
Further, the second support member includes a second support shaft; the planetary gear driving assembly comprises a planetary carrier fixedly arranged at the inner side end of the second supporting shaft, a sun gear is arranged at the end part of the lead screw, and a planetary gear matched with the sun gear is arranged on the planetary carrier; and the second support shaft is in rolling bearing with a gear ring matched with the planet gears.
Further, an adjustment drive ring for receiving a shift adjustment torque is connected to the ring gear.
Further, the outer side wall of the adjusting driving ring is wound with a speed-changing inhaul cable.
Further, a supporting ring is arranged at the inner side end of the planet carrier, and a bearing is arranged between the supporting ring and the screw rod.
Further, the gear ring and the adjusting driving ring are integrally formed to form a fifth integrated ring;
the planetary carrier outer side wall is provided with a supporting seat, and the output assembly comprises an output gear, an output ring and a one-way clutch, wherein the output gear is in rolling bearing with the supporting seat outer side wall, the output ring is in rolling bearing with the fifth integrated ring outer side wall, and the one-way clutch is arranged between the output gear and the output ring;
the output gear is for receiving torque from the unidirectional gear assembly.
Further, the one-way clutch comprises a clutch outer ring and a clutch inner ring, the output gear and the clutch outer ring are integrally formed into a third integrated ring, and the clutch inner ring and the output ring are integrally formed into a fourth integrated ring.
Further, a bearing is arranged between the output gear and the supporting seat, and the third integrated ring is used as a bearing outer ring of the bearing.
Further, a bearing is arranged between the output ring and a fifth integrated ring, the fourth integrated ring is used as a bearing outer ring of the bearing, and the fifth integrated ring is used as a bearing inner ring of the bearing.
Further, the second support part further comprises a second support frame, an outer spigot matched with the second support frame is formed between the support ring and the support seat, and a fastener is arranged between the support seat and the second support frame.
Further, the connecting rod, the rocker gear assembly and the unidirectional gear transmission assembly are matched to form a transmission group, and the number of the transmission groups is multiple; the end parts of the connecting rods are sequentially sleeved on the driving shaft along the axial direction;
the two ends of at least one connecting rod are staggered along the axial direction.
Further, a supporting rod is arranged between the first supporting part and the second supporting part, the rocker gear assembly comprises a rocker gear which is supported on the supporting rod in a rolling way, and a rocker hinged with the connecting rod is fixedly arranged on the end face of the rocker gear.
Further, at least two rocker gears are arranged in a radial opposite manner.
Further, the unidirectional gear transmission assembly comprises a second gear shaft and a third gear shaft which are respectively supported between the first supporting part and the second supporting part in a rolling way, a third gear meshed with the rocker gear is fixedly arranged on the second gear shaft, a first unidirectional gear assembly is sleeved on the second gear shaft, and a fourth gear meshed with the first unidirectional gear assembly is fixedly arranged on the third gear shaft; and the third gear shaft is sleeved with a sixth gear which is in linkage with the third gear shaft along the circumferential direction, and the output assembly comprises output gears which are respectively meshed with the sixth gears.
Further, a second unidirectional gear assembly is sleeved on the second gear shaft, and the transmission direction of the second unidirectional gear assembly is opposite to that of the first unidirectional gear assembly; a fourth gear shaft is in rolling bearing between the first supporting part and the second supporting part, a seventh gear meshed with the second unidirectional gear assembly is fixedly arranged on the fourth gear shaft, and a fifth gear meshed with the seventh gear is fixedly arranged on the third gear shaft.
Further, the first unidirectional gear assembly comprises a first unidirectional gear, a bearing is arranged between the first unidirectional gear and the second gear shaft, and the second unidirectional gear is used as a bearing outer ring of the bearing; a one-way clutch is arranged between the first one-way gear and the second gear shaft; the clutch outer ring of the one-way clutch is integrally formed on the end face of the first one-way gear.
Further, the crank guide groove is fixedly connected with a crank gear, and the crank gear is in rolling bearing with the first supporting component.
Further, the first supporting part is fixedly connected with a second bearing inner ring, and a retainer and balls are arranged between the crank gear and the second bearing inner ring.
Further, the first supporting component comprises a first supporting shaft and a first supporting frame which are fixedly connected, the input assembly comprises an input cylinder and an input gear which are respectively and rollingly supported on the first supporting shaft, and a one-way clutch is arranged between the input cylinder and the input gear;
the first support frame is provided with a transmission gear set connected between the input gear and the crank gear; the transmission gear set comprises a first gear shaft which is supported on the first support frame in a rolling way, a first gear and a second gear which are respectively positioned at two sides of the first support frame are arranged on the first gear shaft, and the first gear shaft, the first gear and the second gear are in linkage along the circumferential direction;
the first gear is meshed with the input gear and the second gear is meshed with the crank gear.
Further, a plurality of transmission gear sets are arranged on the first supporting frame.
Further, the one-way clutch comprises a clutch inner ring integrally formed on the input cylinder and a clutch outer ring integrally formed on the end face of the input gear, and the clutch outer ring and the input gear form a first integrated ring; the first support shaft is fixedly provided with a first bearing inner ring, and a retainer and balls are arranged between the first bearing inner ring and the first integrated ring.
Another object of the present invention is to provide a shift drum comprising the above continuously variable transmission mechanism.
Another object of the present invention is to provide a vehicle including the continuously variable transmission mechanism described above.
In summary, the invention has the following beneficial effects:
1. the driving shaft is controlled to move along the radial direction, which is equivalent to changing the length of the crank, thereby changing the swing angle of the rocker, and realizing the purpose of stepless speed change; the crank rocker assembly and the rotating radius adjusting assembly are arranged, so that not only is speed change adjustment convenient, but also the axial size of the mechanism is optimized, and the installation of a riding vehicle is convenient to match;
2. the first support part and the second support part are fixedly connected to bear each assembly, and the first support part and the second support part are also used for mounting and fixing the whole mechanism, and the arrangement of the structure of the first support part and the second support part enables the continuously variable transmission mechanism to be suitable for a riding vehicle;
3. the radial movement control of the driving shaft is converted into the axial movement control of the adjusting outer ring by utilizing the adjusting connecting rod, so that the adjustment and the structural arrangement are convenient, and meanwhile, the axial movement of the adjusting outer ring is controlled by utilizing the screw rod structure and the planetary gear assembly, so that the control is convenient, the adjustment precision is high, and the stability is good.
Drawings
Fig. 1 is a schematic diagram of a structure of a continuously variable transmission mechanism in embodiment 1;
fig. 2 is a schematic diagram of a continuously variable transmission mechanism in embodiment 1;
fig. 3 is a schematic diagram of a structure of a continuously variable transmission mechanism in embodiment 1;
fig. 4 is a schematic structural view of a continuously variable transmission mechanism in embodiment 1;
FIG. 5 is a schematic view of the clutch gear assembly of embodiment 1;
fig. 6 is a schematic diagram of a structure of a continuously variable transmission mechanism in embodiment 1;
FIG. 7 is a schematic diagram of a crank-rocker assembly and a radius of rotation adjustment assembly according to embodiment 1;
FIG. 8 is a second schematic structural view of the crank-rocker assembly and the radius of rotation adjustment assembly of embodiment 1;
FIG. 9 is a schematic diagram of a crank and rocker assembly and a radius of rotation adjustment assembly according to embodiment 1;
fig. 10 is a schematic diagram of the structure of the shift drum in embodiment 2.
In the figure: 11. a first support frame; 12. a second support frame; 121. a fixing ring; 13. a fixed rod; 21. a first support shaft; 211. a support shaft plate; 22. a second support shaft; 221. a planet carrier; 222. a support ring; 223. a support base; 31. an input cylinder; 321. a first integrated ring; 322. a first bearing inner race; 331. a first gear; 332. a second gear; 333. a first gear shaft; 341. a crank gear; 342. a second bearing inner race; 343. a crank guide groove; 35. an input driving member; 41. a drive shaft; 42. a connecting rod; 43. a rocker; 44. a rocker gear; 45. a support rod; 51. a second gear shaft; 511. a third gear; 52. a first unidirectional gear assembly; 53. a second unidirectional gear assembly; 54. a third gear shaft; 541. a fourth gear; 542. a fifth gear; 543. a sixth gear; 55. a fourth gear shaft; 551. a seventh gear; 61. a third integrated ring; 62. a fourth integrated ring; 71. a positioning ring; 711. a positioning rod; 72. positioning shaft seat; 721. positioning a chute; 73. a slide block; 74. adjusting the connecting rod; 751. adjusting an outer ring; 752. a hinge base; 753. adjusting the screw sleeve; 76. a screw rod; 761. a sun gear; 762. a planet wheel; 763. a gear ring; 764. adjusting the driving ring; 77. a speed-changing guy cable; 8. flower-drum casing.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Example 1:
1-9, which include a first support member and a second support member fixedly connected, and further include an input assembly carried on the first support member, an output assembly carried on the second support member, a crank-rocker assembly carried between the first support member and the second support member, a unidirectional gear assembly carried between the first support member and the second support member, and a rotation radius adjustment assembly carried on the second support member, wherein the unidirectional gear assembly is used for transmitting torque of the crank-rocker assembly to the output assembly; the crank-rocker assembly in this embodiment comprises a crank guide slot 343, a driving shaft 41, a positioning shaft seat 72, a connecting rod 42 and a rocker gear assembly connected with the unidirectional gear transmission assembly; one end of the connecting rod 42 is hinged with the rocker gear assembly, and the other end is sleeved on the driving shaft 41; one end of the driving shaft 41 is embedded in the crank guide groove 343, and the other end is connected with the positioning shaft seat 72; the crank guide slot 343 and the positioning shaft seat 72 comprise a rotation central axis which coincides with each other; the crank guide 343 receives the torque of the input assembly and drives the driving shaft 41 to revolve around the rotation center axis; the rotation radius adjusting assembly can control the driving shaft 41 to move in a radial direction to adjust the revolution radius of the driving shaft 41; in the embodiment, each component is borne by the first supporting component and the second supporting component which are fixedly connected, the first supporting component and the second supporting component are also used for mounting and fixing the whole mechanism, and the continuously variable transmission mechanism in the embodiment can be suitable for a riding vehicle due to structural arrangement, so that the speed change smoothness in the riding process can be improved, and the riding experience is optimized; meanwhile, in the present embodiment, the driving shaft 41 is controlled to move along the radial direction, which is equivalent to changing the length of the crank, so as to change the swing angle of the rocker, thereby realizing the purpose of stepless speed change; the crank rocker assembly and the rotary radius adjusting assembly are arranged in the embodiment, so that speed change adjustment is facilitated, the axial size of the mechanism is optimized, and the installation of a riding vehicle is facilitated.
Referring to fig. 1 to 6, specifically, the first supporting member in the present embodiment includes a first supporting shaft 21 and a first supporting frame 11 fixedly connected; preferably, a supporting shaft plate 211 is arranged at the inner side end of the first supporting shaft 21, a step matching surface is arranged between the supporting shaft plate 211 and the first supporting frame 11, and the supporting shaft plate 211 and the first supporting frame 11 are fixedly connected through bolts, so that the connection stability can be improved; the second support part comprises a second support shaft 22 and a second support frame 12 which are fixedly connected, and a plurality of fixing rods 13 are fixedly arranged between the first support frame 11 and the second support frame 12; in this embodiment, the first support member and the second support member are both of a split structure, so that production and assembly are facilitated.
Referring to fig. 1 to 9, the radius of rotation adjustment assembly preferably includes an adjustment outer ring 751 movable along a central axis of rotation, and an adjustment link 74 is hinged between the drive shaft 41 and the adjustment outer ring 751; the side wall of the positioning shaft seat 72 is provided with a positioning guide groove matched with the driving shaft 41; the radial movement control of the drive shaft 41 is converted into the axial movement control of the adjusting outer ring 751 by the adjusting link 74, thereby facilitating the adjustment and structural arrangement; preferably, the end of the driving shaft 41 is provided with a positioning sliding block 73 hinged with an adjusting connecting rod 74, and a positioning sliding groove 721 matched with the positioning sliding block 73 is arranged in the positioning shaft seat 72; the arrangement of the positioning slide block 73 and the positioning slide groove 721 is beneficial to improving the stability of the driving shaft 41 and is convenient for realizing the transmission between the driving shaft 41 and the positioning shaft seat 72; specifically, in this embodiment, the positioning shaft seat 72 is fixedly connected with the positioning ring 71, the positioning ring 71 is supported on the second supporting component in a rolling manner, specifically, the end face of the second supporting frame 12 is provided with the fixing ring 121, and a bearing is arranged between the positioning ring 71 and the fixing ring 121, so that the positioning shaft seat 72 and the positioning ring 71 rotate together around the rotation central axis; preferably, a positioning rod 711 is arranged between the positioning ring 71 and the positioning shaft seat 72, so that the connection stability can be improved; specifically, the axes of the first support shaft 21 and the second support shaft 22 in the present embodiment coincide, and coincide with the rotation center axis.
Referring to fig. 1 to 9, the radius rotation adjustment assembly preferably further includes a screw rod 76 rollably supported to the second support member, and an adjustment screw sleeve 753 coupled to the adjustment outer ring 751 is sleeved on the screw rod 76; the adjusting outer ring 751 can rotate relative to the adjusting screw sleeve 753, and the adjusting screw sleeve 753 can drive the adjusting outer ring 751 to move along the axial direction; the driving shaft 41 drives the adjusting connecting rod 74 and the adjusting outer ring 751 to rotate together, so that the adjusting outer ring 751 can rotate relative to the adjusting screw sleeve 753, and smooth rotation of the driving shaft 41 can be ensured; in the embodiment, the screw rod 76 is matched with the adjusting screw sleeve 753 to drive the adjusting outer ring 751 to axially move, so that the driving shaft 41 is driven to radially move by the adjusting connecting rod 74; the screw rod 76 and the adjusting screw sleeve 753 have self-locking property, and can ensure that the adjusting outer ring 751 cannot deviate along the axial direction after adjustment, thereby ensuring the stability of a speed change state; during normal operation, the relative position of the crank guide groove 343 and the driving shaft 41 is kept unchanged, and the inner side wall of the crank guide groove 343 acts on the driving shaft 41 and then drives the driving shaft 41 to revolve; during adjustment, the drive shaft 41 moves radially relative to the crank guide 343, i.e. the radially arranged crank guide 343 provides the drive shaft 41 with an amount of play; preferably, a retainer and balls are arranged between the adjusting outer ring 751 and the adjusting screw sleeve 753, namely, the adjusting outer ring 751 and the adjusting screw sleeve 753 are respectively used as a bearing outer ring and a bearing inner ring, so that the smoothness of rotation of the adjusting outer ring 751 can be ensured, and the adjusting precision and the stability can be improved; preferably, the outer side wall of the adjusting outer ring 751 is fixedly provided with a hinge seat 752 matched with the adjusting connecting rod 74, and preferably, the adjusting outer ring 751 and the hinge seat 752 are integrally formed; therefore, the structural arrangement of the adjusting outer ring 751, the adjusting screw sleeve 753 and the hinge seat 752 in the embodiment can reduce the number of parts and is convenient to assemble; of course, in other alternative embodiments, a separate bearing may be disposed between the adjusting outer ring 751 and the adjusting screw 753, and other structures may be used between the adjusting outer ring 751 and the adjusting screw 753 to achieve transmission and limitation, which is not limited herein.
Referring to fig. 1 to 10, preferably, a bearing is provided between the lead screw 76 and the positioning shaft seat 72; one end of the screw 76 is supported by the second supporting member in a rolling manner, and the other end of the screw 76 is supported by the positioning shaft seat 72 in a rolling manner, so that the stability of the screw 76 can be improved; the lead screw 76 also plays a supporting role on the positioning shaft seat 72, so that the stability of the positioning shaft seat 72 is improved; preferably, the radius of rotation adjustment assembly further includes a planetary gear drive assembly for controlling rotation of the lead screw 76; specifically, in this embodiment, the screw 76 and the second support shaft 22 include coincident axes, and the inner end of the second support shaft 22 is opposite to the screw 76, and a gap is left between the two ends; the planetary gear driving assembly comprises a planetary carrier 221 fixedly arranged at the inner side end of the second support shaft 22, a sun gear 761 is integrally formed at the end part of the lead screw 76, and a planetary gear 762 matched with the sun gear 761 is arranged on the planetary carrier 221; a gear ring 763 matched with the planet wheel 762 is supported on the second support shaft 22 in a rolling way; preferably, gear ring 763 has an adjustment drive ring 764 connected thereto for receiving a shift adjustment torque; that is, the planet carrier 221 is fixed, and after the adjustment driving ring 764 rotates, the sun gear 761 is driven to rotate by the gear ring 763 and the planet gear 762, so as to control the screw 76 to rotate; in the embodiment, the planetary gear driving assembly is adopted to drive the screw rod 76 to rotate, and the driving end is transferred from the inside of the second supporting part to the outside of the second supporting part, so that the adjustment is convenient, and the transmission stability is good; specifically, in this embodiment, the outer side wall of the adjusting driving ring 764 is wound with a speed change cable 77, and the speed change cable 77 is pulled to control the adjusting driving ring 764 to rotate, so as to realize speed change adjustment; of course, in other alternative embodiments, the motor may be used in conjunction with a gear structure, a synchronous belt structure, or a chain structure to drive the adjustment driving ring 764 to rotate, which is not limited herein.
Referring to fig. 1 to 9, preferably, the inner end of the planet carrier 221 is provided with a support ring 222, and a bearing is provided between the support ring 222 and the screw 76, i.e., rolling bearing of the screw 76 is achieved; preferably, gear ring 763 and adjustment drive ring 764 are integrally formed to form a fifth integrated ring in this embodiment; the outer side wall of the planet carrier 221 is provided with a supporting seat 223, and the output assembly comprises an output gear which is in rolling bearing with the outer side wall of the supporting seat 223, an output ring which is in rolling bearing with the outer side wall of the fifth integrated ring, and a one-way clutch which is arranged between the output gear and the output ring; the output gear is used for receiving the torque of the unidirectional gear transmission assembly; a single-row clutch is arranged between the output gear and the output ring and is used for reducing the resistance born by the vehicle when the vehicle slides; preferably, the one-way clutch comprises a clutch outer ring and a clutch inner ring, the output gear and the clutch outer ring are integrally formed into a third integrated ring 61, and the clutch inner ring and the output ring are integrally formed into a fourth integrated ring 62; preferably, a bearing is provided between the output gear and the support seat 223, and the third integrated ring 61 serves as a bearing outer ring of the bearing; preferably, a bearing is arranged between the output ring and the fifth integrated ring, the fourth integrated ring 62 is used as a bearing outer ring of the bearing, and the fifth integrated ring is used as a bearing inner ring of the bearing; the arrangement of each integrated ring in the embodiment can reduce the number of parts, is convenient to assemble, and optimizes the local radial dimension; preferably, an external spigot matched with the second support frame 12 is formed between the support ring 222 and the support seat 223 in the embodiment, and a fastener is arranged between the support seat 223 and the second support frame 12; in this embodiment, the second support shaft 22, the planet carrier 221, the support ring 222 and the support seat 223 are integrally formed, and then are connected with the second support frame 12 through the male end and the fastener, so that the connection stability can be improved; the screw 76 is also supported in rolling manner by the support ring 222 and the bearing in this embodiment, which is also convenient for assembly.
Referring to fig. 1 to 9, specifically, in this embodiment, the connecting rod 42, the rocker gear assembly and the unidirectional gear transmission assembly cooperate to form a transmission group, and the number of transmission groups is plural, so that the fluctuation of the speed of the rocker can be reduced, and a stable output can be obtained; specifically, the number of the transmission groups is two in the present embodiment, however, in other alternative embodiments, the number of the transmission groups may be increased, which is not limited herein; specifically, the end parts of the plurality of connecting rods 42 are sequentially sleeved on the driving shaft 41 along the axial direction, and preferably, a bearing is arranged between the end part of each connecting rod 42 and the driving shaft 41 in the embodiment; that is, one driving shaft 41 in the present embodiment drives a plurality of transmission groups simultaneously, thereby facilitating adjustment of the radius of rotation; specifically, in this embodiment, a supporting rod 45 is disposed between the first supporting frame 11 and the second supporting frame 12, the rocker gear assembly includes a rocker gear 44 rolling supported on the supporting rod 45, and a rocker 43 hinged with the connecting rod 42 is fixedly disposed on an end surface of the rocker gear 44; preferably, two ends of the at least one connecting rod 42 are staggered along the axial direction, and at least two rocker gears 44 are arranged in a radial opposite manner; in the embodiment, the number of the unidirectional gear transmission assemblies is two, and the two rocker gears 44 are arranged in a radial opposite manner, namely, the two rocker gears 44 are respectively arranged at the same axial position of the two supporting rods 45, so that the structural arrangement of the two unidirectional gear rotation assemblies is the same, thereby facilitating the production and assembly and being beneficial to optimizing the axial dimension; the end of the connecting rod 42 connected with the driving shaft 41 is positioned as the inner end of the connecting rod, and the end of the connecting rod 42 connected with the rocker 43 is defined as the outer end of the connecting rod; in this embodiment, the connecting rod 42 includes a middle inclined section, so that the inner end of the connecting rod and the outer end of the connecting rod are axially staggered, and the axial staggering directions of the two connecting rods 42 are opposite, so that the purpose of the connecting rods is to match the connection of two rockers 43 with the same axial position respectively; that is, the structure of the connecting rod 42 in the present embodiment is beneficial to optimizing the axial dimension, and can reduce the influence of the number of transmission sets on the axial dimension of the mechanism; of course, in alternative embodiments, the rocker 43 may be of a sloped design, without limitation.
Referring to fig. 1 to 5, specifically, the unidirectional gear transmission assembly in this embodiment includes a second gear shaft 51 and a third gear shaft 54 respectively rolling supported between the first support frame 11 and the second support frame 12, the second gear shaft 51 is fixedly provided with a third gear 511 engaged with the rocker gear 44, the second gear shaft 51 is sleeved with a first unidirectional gear assembly 52, and the third gear shaft 54 is fixedly provided with a fourth gear 541 engaged with the first unidirectional gear assembly 52; a sixth gear 543 which is linked with the third gear shaft 54 along the circumferential direction is sleeved on the third gear shaft 54; the sixth gear 543 and the fourth gear 541 are respectively located at two sides of the second supporting frame 12, and the output gears are respectively meshed with the two sixth gears 543; preferably, the second gear shaft 51 is further sleeved with a second unidirectional gear assembly 53, and the transmission direction of the second unidirectional gear assembly 53 is opposite to that of the first unidirectional gear assembly 52; a fourth gear shaft 55 is supported between the first support frame 11 and the second support frame 12 in a rolling manner, a seventh gear 551 meshed with the second unidirectional gear assembly 53 is fixedly arranged on the fourth gear shaft 55, and a fifth gear 542 meshed with the seventh gear 551 is fixedly arranged on the third gear shaft 54; in the embodiment, the first unidirectional gear assembly and the second unidirectional gear assembly are adopted to respectively receive the torques of the rocker gear 44 in opposite directions in one period, so that the fluctuation of the rocker speed can be reduced, and stable output can be obtained; specifically, in the present embodiment, the first unidirectional gear assembly 52 has the same structure as the second unidirectional gear assembly 53, and the first unidirectional gear assembly 52 is specifically described below; the first unidirectional gear assembly 52 includes a first unidirectional gear, a bearing is disposed between the first unidirectional gear and the second gear shaft 51, and the second unidirectional gear serves as a bearing outer ring of the bearing; a one-way clutch is arranged between the first one-way gear and the second gear shaft 51; the clutch outer ring of the one-way clutch is integrally formed on the end face of the first one-way gear; the rocker gear 44 drives the third gear 511 to rotate, the third gear 511 drives the second gear shaft 51 to rotate, and the second gear shaft 51 drives the first unidirectional gear to rotate through the unidirectional clutch; the structural arrangement of the first one-way gear assembly 52 in this embodiment is advantageous in reducing the number of parts, facilitating assembly, and optimizing the local radial dimension.
Referring to fig. 1 to 9, specifically, a crank gear 341 is fixedly connected to the crank guide 343, and the crank gear 341 is rolling-supported on the first supporting member; specifically, the inner end surface of the first support shaft 21 is fixedly connected with a second bearing inner ring 342, and a retainer and balls are arranged between the crank gear 341 and the second bearing inner ring 342; that is, the crank gear 341 also serves as a bearing outer ring in the present embodiment, so that the number of parts can be reduced and assembly is facilitated; the crank guide slot 343 is U-shaped in cross section and is fixedly connected to the end face of the crank gear 341; specifically, in this embodiment, the inner side wall of the second bearing inner ring 342 is provided with a connecting plate, and fasteners connected to the first support shaft 21 are provided on the connecting plate in a penetrating manner, so that rolling support is conveniently realized on the crank gear 341, and the local axial dimension and radial dimension are optimized.
Referring to fig. 1 to 9, specifically, the input assembly in the present embodiment includes an input cylinder 31 and an input gear, which are respectively rollably supported on a first support shaft 21, with a one-way clutch provided therebetween; the first supporting frame 11 is provided with a transmission gear set connected between the input gear and the crank gear 341; the transmission gear set comprises a first gear shaft 333 which is supported on the first support frame 11 in a rolling way, a first gear 331 and a second gear 332 which are respectively positioned at two sides of the first support frame 11 are arranged on the first gear shaft 333, and the first gear shaft 333, the first gear 331 and the second gear 332 are in linkage along the circumferential direction; the first gear 331 is meshed with the input gear, and the second gear 332 is meshed with the crank gear 341; preferably, a plurality of transmission gear sets are disposed on the first supporting frame 11, specifically, two transmission gear sets are disposed on the first supporting frame 11 in this embodiment, so as to improve uniform stability of transmission; the input cylinder 31 drives the input gear to rotate through the one-way clutch, and the input gear drives the crank gear 341 to rotate through the transmission gear set, so that torque transmission between the input assembly and the crank rocker assembly is realized; preferably, the one-way clutch comprises a clutch inner ring integrally formed on the input cylinder 31 and a clutch outer ring integrally formed on the end surface of the input gear, and the clutch outer ring and the input gear form a first integrated ring 321; the first bearing inner ring 322 is fixedly arranged on the first support shaft 21, and a retainer and balls are arranged between the first bearing inner ring 322 and the first integrated ring 321, namely the first integrated ring 321 is also used as a bearing outer ring, so that the number of parts can be reduced, the assembly is convenient, and the local axial dimension and the local radial dimension are optimized; specifically, in this embodiment, a connecting plate matched with the outer end surface of the supporting shaft plate 211 is disposed on the inner side wall of the first bearing inner ring 322, and fasteners connected with the supporting shaft plate 211 are disposed on the connecting plate in a penetrating manner, so as to realize the fixed installation of the first bearing inner ring 322; the structural design of the first bearing inner ring 322 is beneficial to optimizing local axial dimension and radial dimension; the input cylinder 31, crank gear 341, crank guide 343, positioning shaft seat 72, positioning ring 71, and output gear in this embodiment include coincident center axes of rotation, thereby facilitating placement on a riding vehicle for transmission.
Example 2:
referring to fig. 1 to 10, a shift drum includes a continuously variable transmission mechanism in embodiment 1; also comprises a flower-drum shell 8; one end of the hub shell 8 is supported on the input cylinder 31 in a rolling way, and the other end is sleeved on the output ring; the hub shell 8 and the output ring are linked in the circumferential direction, so that the rotating speed of the output ring is transmitted to the hub shell 8; the input cylinder 31 is sleeved with an input driving piece 35 which is linked along the circumferential direction, and the input driving piece 35 can be a chain wheel or a gear; the variable speed hub in the embodiment can be installed at the center of a rear wheel of a riding vehicle, the first support shaft 21 and the second support shaft 22 are fixedly connected with a frame, trampling power or auxiliary power is transmitted to the variable speed hub through the input driving piece 35, and the variable speed hub is output through the hub shell 8 after speed change, so that the rear wheel is driven to rotate to drive the vehicle to advance; of course, in alternative embodiments, the hub shell 8 may be directly formed as a part of the output assembly, such as by providing a ring gear structure within the hub shell 8 that meshes with the sixth gear 543, without limitation.
Example 3:
a vehicle, referring to fig. 1 to 10, comprising the continuously variable transmission mechanism in embodiment 1 or comprising the shift drum in embodiment 2; that is, the continuously variable transmission mechanism may be formed as a transmission drum to be mounted on a vehicle and used as a continuously variable transmission; alternatively, the continuously variable transmission mechanism is used as one of transmission devices in a vehicle drive system.
Claims (29)
1. A continuously variable transmission mechanism, comprising:
the first support component and the second support component are fixedly connected;
an input assembly carried on the first support member;
an output assembly carried on the second support member;
a crank and rocker assembly carried between the first and second support members;
a unidirectional gear transmission assembly carried between the first and second support members for transmitting torque of the crank and rocker assembly to an output assembly; the method comprises the steps of,
a radius of rotation adjustment assembly;
the crank rocker assembly comprises a crank guide groove, a driving shaft, a positioning shaft seat, a connecting rod and a rocker gear assembly connected with the unidirectional gear transmission assembly; one end of the connecting rod is hinged with the rocker gear assembly, and the other end of the connecting rod is sleeved on the driving shaft; one end of the driving shaft is embedded in the crank guide groove, and the other end of the driving shaft is connected with the positioning shaft seat;
the crank guide groove and the positioning shaft seat comprise a rotation central axis which is coincident;
the crank guide groove receives the torque of the input assembly and drives the driving shaft to revolve around the rotation central axis;
the rotating radius adjusting assembly can control the driving shaft to move along the radial direction so as to adjust the revolution radius of the driving shaft;
the rotary radius adjusting assembly comprises an adjusting outer ring capable of moving along the rotary central axis, and an adjusting connecting rod is hinged between the driving shaft and the adjusting outer ring; the side wall of the positioning shaft seat is provided with a positioning guide groove matched with the driving shaft;
the end part of the driving shaft is provided with a positioning sliding block hinged with the adjusting connecting rod, and a positioning sliding groove matched with the positioning sliding block is arranged in the positioning shaft seat;
the rotating radius adjusting assembly further comprises a screw rod which is in rolling bearing with the second supporting component, and an adjusting screw sleeve connected with the adjusting outer ring is sleeved on the screw rod; the adjusting outer ring can rotate relative to the adjusting screw sleeve, and the adjusting screw sleeve can drive the adjusting outer ring to axially move.
2. The continuously variable transmission mechanism according to claim 1, wherein: and a retainer and balls are arranged between the adjusting outer ring and the adjusting screw sleeve.
3. The continuously variable transmission mechanism according to claim 2, characterized in that: and a hinge seat matched with the adjusting connecting rod is fixedly arranged on the outer side wall of the adjusting outer ring.
4. A continuously variable transmission as claimed in claim 3, wherein: the adjusting outer ring and the hinging seat are integrally formed.
5. The continuously variable transmission mechanism according to claim 1, wherein: and a bearing is arranged between the lead screw and the positioning shaft seat.
6. The continuously variable transmission mechanism according to claim 1, wherein: the positioning shaft seat is fixedly connected with a positioning ring, and the positioning ring is in rolling bearing with the second supporting component.
7. The continuously variable transmission mechanism according to claim 1, wherein: the radius of rotation adjustment assembly also includes a planetary gear drive assembly for controlling the rotation of the lead screw.
8. The continuously variable transmission mechanism according to claim 7, wherein: the second support member includes a second support shaft; the planetary gear driving assembly comprises a planetary carrier fixedly arranged at the inner side end of the second supporting shaft, a sun gear is arranged at the end part of the lead screw, and a planetary gear matched with the sun gear is arranged on the planetary carrier; and the second support shaft is in rolling bearing with a gear ring matched with the planet gears.
9. The continuously variable transmission mechanism according to claim 8, wherein: the gear ring is connected with an adjusting driving ring for receiving speed change adjusting torque.
10. The continuously variable transmission mechanism according to claim 9, wherein: the outer side wall of the adjusting driving ring is wound with a speed-changing inhaul cable.
11. The continuously variable transmission mechanism according to claim 9, wherein: the planet carrier is characterized in that a supporting ring is arranged at the inner side end of the planet carrier, and a bearing is arranged between the supporting ring and the screw rod.
12. The continuously variable transmission mechanism according to claim 11, characterized in that: the gear ring and the adjusting driving ring are integrally formed to form a fifth integrated ring;
the planetary carrier outer side wall is provided with a supporting seat, and the output assembly comprises an output gear, an output ring and a one-way clutch, wherein the output gear is in rolling bearing with the supporting seat outer side wall, the output ring is in rolling bearing with the fifth integrated ring outer side wall, and the one-way clutch is arranged between the output gear and the output ring;
the output gear is for receiving torque from the unidirectional gear assembly.
13. The continuously variable transmission mechanism according to claim 12, wherein: the one-way clutch comprises a clutch outer ring and a clutch inner ring, the output gear and the clutch outer ring are integrally formed into a third integrated ring, and the clutch inner ring and the output ring are integrally formed into a fourth integrated ring.
14. The continuously variable transmission mechanism according to claim 13, wherein: and a bearing is arranged between the output gear and the supporting seat, and the third integrated ring is used as a bearing outer ring of the bearing.
15. The continuously variable transmission mechanism according to claim 13, wherein: and a bearing is arranged between the output ring and the fifth integrated ring, the fourth integrated ring is used as a bearing outer ring of the bearing, and the fifth integrated ring is used as a bearing inner ring of the bearing.
16. The continuously variable transmission mechanism according to claim 12, wherein: the second support part further comprises a second support frame, an outer spigot matched with the second support frame is formed between the support ring and the support seat, and a fastener is arranged between the support seat and the second support frame.
17. The continuously variable transmission mechanism according to claim 1, wherein: the connecting rod, the rocker gear assembly and the unidirectional gear transmission assembly are matched to form a transmission group, and the number of the transmission groups is multiple; the end parts of the connecting rods are sequentially sleeved on the driving shaft along the axial direction;
the two ends of at least one connecting rod are staggered along the axial direction.
18. The continuously variable transmission mechanism according to claim 17, characterized in that: the rocker gear assembly comprises a rocker gear which is supported on the support rod in a rolling way, and a rocker hinged with the connecting rod is fixedly arranged on the end face of the rocker gear.
19. The continuously variable transmission mechanism according to claim 18, characterized in that: at least two rocker gears are arranged in a radial opposite mode.
20. The continuously variable transmission mechanism according to claim 18, characterized in that: the unidirectional gear transmission assembly comprises a second gear shaft and a third gear shaft which are respectively supported between the first supporting part and the second supporting part in a rolling way, a third gear meshed with the rocker gear is fixedly arranged on the second gear shaft, a first unidirectional gear assembly is sleeved on the second gear shaft, and a fourth gear meshed with the first unidirectional gear assembly is fixedly arranged on the third gear shaft; and the third gear shaft is sleeved with a sixth gear which is in linkage with the third gear shaft along the circumferential direction, and the output assembly comprises output gears which are respectively meshed with the sixth gears.
21. The variable speed mechanism of claim 20, wherein: the second gear shaft is also sleeved with a second one-way gear assembly, and the transmission direction of the second one-way gear assembly is opposite to that of the first one-way gear assembly; a fourth gear shaft is in rolling bearing between the first supporting part and the second supporting part, a seventh gear meshed with the second unidirectional gear assembly is fixedly arranged on the fourth gear shaft, and a fifth gear meshed with the seventh gear is fixedly arranged on the third gear shaft.
22. The variable speed mechanism of claim 20, wherein: the first unidirectional gear assembly comprises a first unidirectional gear, a bearing is arranged between the first unidirectional gear and the second gear shaft, and the second unidirectional gear is used as a bearing outer ring of the bearing; a one-way clutch is arranged between the first one-way gear and the second gear shaft; the clutch outer ring of the one-way clutch is integrally formed on the end face of the first one-way gear.
23. The continuously variable transmission mechanism according to claim 1, wherein: the crank guide groove is fixedly connected with a crank gear, and the crank gear is in rolling bearing with the first supporting component.
24. The continuously variable transmission mechanism according to claim 23, characterized in that: the first support component is fixedly connected with a second bearing inner ring, and a retainer and balls are arranged between the crank gear and the second bearing inner ring.
25. The continuously variable transmission mechanism according to claim 23, characterized in that: the first supporting component comprises a first supporting shaft and a first supporting frame which are fixedly connected, the input assembly comprises an input cylinder and an input gear which are respectively and rollingly supported on the first supporting shaft, and a one-way clutch is arranged between the input cylinder and the input gear;
the first support frame is provided with a transmission gear set connected between the input gear and the crank gear; the transmission gear set comprises a first gear shaft which is supported on the first support frame in a rolling way, a first gear and a second gear which are respectively positioned at two sides of the first support frame are arranged on the first gear shaft, and the first gear shaft, the first gear and the second gear are in linkage along the circumferential direction;
the first gear is meshed with the input gear and the second gear is meshed with the crank gear.
26. The variable speed mechanism of claim 25, wherein: the first support frame is provided with a plurality of transmission gear sets.
27. The variable speed mechanism of claim 25, wherein: the one-way clutch comprises a clutch inner ring integrally formed on the input cylinder and a clutch outer ring integrally formed on the end face of the input gear, and the clutch outer ring and the input gear form a first integrated ring; the first support shaft is fixedly provided with a first bearing inner ring, and a retainer and balls are arranged between the first bearing inner ring and the first integrated ring.
28. A variable speed hub, characterized in that: comprising a continuously variable transmission mechanism as claimed in any of claims 1 to 27.
29. A vehicle, characterized in that: comprising a continuously variable transmission mechanism as claimed in any of claims 1 to 27.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211229759.8A CN115432102B (en) | 2022-10-08 | 2022-10-08 | Continuously variable transmission mechanism, speed change hub and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211229759.8A CN115432102B (en) | 2022-10-08 | 2022-10-08 | Continuously variable transmission mechanism, speed change hub and vehicle |
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| CN115432102A CN115432102A (en) | 2022-12-06 |
| CN115432102B true CN115432102B (en) | 2023-08-04 |
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| CN217177297U (en) * | 2022-04-01 | 2022-08-12 | 八方电气(苏州)股份有限公司 | Rear-mounted automatic transmission for tricycle |
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| KR20140011564A (en) * | 2012-07-17 | 2014-01-29 | 한서대학교 산학협력단 | Continuously variable transmission of motor mount |
| CN204153083U (en) * | 2014-08-15 | 2015-02-11 | 尹谷林 | A kind of swing-arm type stepless speed variator |
| WO2016083080A1 (en) * | 2014-11-24 | 2016-06-02 | Gerhard Kirschey | Continuously variable bicycle gear system |
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| CN115432102A (en) | 2022-12-06 |
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