CN115432102A

CN115432102A - Continuously variable transmission mechanism, transmission hub and vehicle

Info

Publication number: CN115432102A
Application number: CN202211229759.8A
Authority: CN
Inventors: 黄善劲
Original assignee: Bafang Electric Suzhou Co Ltd
Current assignee: Bafang Electric Suzhou Co Ltd
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2022-12-06
Anticipated expiration: 2042-10-08
Also published as: CN115432102B

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 point of the technical scheme is that the device comprises a crank rocker component and a rotating radius adjusting component; the crank rocker component comprises a crank guide groove, a driving shaft, a positioning shaft seat, a connecting rod and a rocker gear component connected with the one-way gear transmission component; 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 coincident rotating central axes; the crank guide groove receives the torque of the input assembly and drives the driving shaft to revolve around the rotating central axis; the rotary 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 invention can optimize the axial size, thereby being convenient to be installed on a vehicle, realizing the stepless speed change in the riding process and optimizing the riding experience.

Description

Continuously variable transmission mechanism, transmission hub and vehicle

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

A prior chinese patent with an issued publication number of CN104179908B discloses a continuously variable transmission, which includes 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 rotational center axis parallel to the rotational center axis of the input portion.

However, the input shaft and the output shaft of the above-described continuously variable transmission are arranged in parallel, so that the continuously variable transmission cannot be fitted to the mounting of a riding vehicle (such as a bicycle, an electric power-assisted bicycle, a tricycle, and the like), for example, cannot be mounted on a rear wheel of a bicycle to be used as a shift hub. Moreover, the structure of the rotating radius adjusting mechanism enables the axial dimension of the continuously variable transmission to be large, and the axial dimension is not optimized to match the frame dimension of the riding vehicle.

Disclosure of Invention

In view of the defects in the prior art, one of the purposes of the present invention is to provide a stepless speed change mechanism, which can optimize the axial dimension, so as to be conveniently installed on a vehicle, to realize stepless speed change in the riding process, and to optimize the riding experience.

In order to achieve the purpose, the invention provides the following technical scheme:

a continuously variable transmission mechanism comprising:

the first supporting component and the second supporting component are fixedly connected;

the input assembly is borne on the first supporting part;

an output assembly carried on the second support member;

the crank rocker assembly is born between the first supporting component and the second supporting component;

the one-way gear transmission assembly is borne between the first supporting component and the second supporting component and is used for transmitting the torque of the crank rocker assembly to the output assembly; and the number of the first and second groups,

a rotating radius adjustment assembly;

the crank and 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 one-way 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 coincident rotating central axes;

the crank guide groove receives the torque of the input assembly and drives the driving shaft to revolve around the rotating central axis;

the rotary 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.

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 a positioning guide groove matched with the driving shaft is formed in the side wall of the positioning shaft seat.

Furthermore, 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.

Furthermore, the rotating radius adjusting assembly also comprises a lead screw which is supported on the second supporting component in a rolling way, and an adjusting threaded sleeve connected with an adjusting outer ring is sleeved on the lead screw; the adjusting outer ring can rotate relative to the adjusting threaded sleeve, and the adjusting threaded sleeve can drive the adjusting outer ring to move axially.

Furthermore, a retainer and a ball are arranged between the adjusting outer ring and the adjusting thread sleeve.

Furthermore, the outer side wall of the adjusting outer ring is fixedly provided with a hinged seat matched with the adjusting connecting rod.

Further, adjust outer lane and articulated seat as integrated into one piece.

Further, a bearing is arranged between the lead screw and the positioning shaft seat.

Furthermore, a positioning ring is fixedly connected to the positioning shaft seat, and the positioning ring is supported on the second support component in a rolling manner.

Further, the rotating radius adjusting assembly further comprises a planetary gear driving assembly for controlling the rotation of the lead screw.

Further, the second support member includes a second support shaft; the planetary gear driving assembly comprises a planet 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 planet carrier; and a gear ring matched with the planet gear is supported on the second support shaft in a rolling way.

Further, an adjustment drive ring for receiving a shift adjustment torque is connected to the ring gear.

Furthermore, a speed change inhaul cable is wound on the outer side wall of the adjusting driving ring.

Furthermore, a support ring is arranged at the inner side end of the planet carrier, and a bearing is arranged between the support ring and the lead screw.

Further, the gear ring and the adjusting driving ring are integrally formed to form a fifth integrated ring;

the outer side wall of the planet carrier 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 supported on the outer side wall of the supporting seat in a rolling manner, the output ring is supported on the outer side wall of the fifth integrated ring in a rolling manner, and the one-way clutch is arranged between the output gear and the output ring;

the output gear is used for receiving the torque of the one-way gear transmission assembly.

Furthermore, 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 to form a third integrated ring, and the clutch inner ring and the output ring are integrally formed to form 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 component also 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.

Furthermore, the connecting rods, the rocker gear assemblies and the one-way gear transmission assemblies are matched to form a transmission set, and the number of the transmission sets 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 arranged in a staggered mode along the axial direction.

Furthermore, a supporting rod is arranged between the first supporting component and the second supporting component, the rocker gear assembly comprises a rocker gear which is supported on the supporting rod in a rolling manner, and a rocker which is 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 direction opposite to each other.

Furthermore, the one-way gear transmission assembly comprises a second gear shaft and a third gear shaft which are respectively supported between the first supporting component and the second supporting component in a rolling way, a third gear meshed with the rocker gear is fixedly arranged on the second gear shaft, a first one-way gear assembly is sleeved on the second gear shaft, and a fourth gear meshed with the first one-way gear assembly is fixedly arranged on the third gear shaft; the third gear shaft is sleeved with a sixth gear which is linked with the third gear shaft along the circumferential direction, and the output assembly comprises output gears which are respectively meshed with the sixth gears.

Furthermore, a second one-way gear assembly is sleeved on the second gear shaft, 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 supported between the first supporting component and the second supporting component in a rolling mode, a seventh gear meshed with the second one-way 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.

Furthermore, the first one-way gear assembly comprises a first one-way gear, a bearing is arranged between the first one-way gear and the second gear shaft, and the second one-way 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; and a clutch outer ring of the one-way clutch is integrally formed on the end surface of the first one-way gear.

Furthermore, a crank gear is fixedly connected to the crank guide groove, and the crank gear is supported on the first supporting component in a rolling mode.

Furthermore, 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.

Furthermore, the first supporting component comprises a first supporting shaft and a first supporting frame which are fixedly connected, the input component comprises an input cylinder and an input gear which are respectively supported on the first supporting shaft in a rolling way, 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 on 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 linked along the circumferential direction;

the first gear is engaged with the input gear and the second gear is engaged with the crank gear.

Furthermore, a plurality of transmission gear sets are arranged on the first support frame.

Furthermore, the one-way clutch comprises a clutch inner ring and a clutch outer ring, wherein the clutch inner ring is integrally formed on the input cylinder, the clutch outer ring is integrally formed on the end face of the input gear, and the clutch outer ring and the input gear form a first integrated ring; a first bearing inner ring is fixedly arranged on the first support shaft, 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 variable speed hub, which comprises 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 conclusion, 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, so that the swing angle of the rocker is changed, and the purpose of stepless speed change is achieved; the arrangement of the crank rocker assembly and the rotating radius adjusting assembly not only facilitates speed change adjustment, but also facilitates the optimization of the axial size of the mechanism, thereby facilitating the installation of matching riding vehicles;

2. the first support part and the second support part are fixedly connected to carry each component, and the first support part and the second support part are also used for mounting and fixing the whole mechanism, and the stepless speed change mechanism can be suitable for riding vehicles due to the structural arrangement of the first support part and the second support part;

3. utilize the regulation connecting rod, convert the radial movement control of drive shaft into the axial displacement control of adjusting the outer lane to conveniently adjust and the structural arrangement, simultaneously, utilize lead screw structure and planetary gear assembly to control the axial displacement who adjusts the outer lane, thereby convenient control adjusts the precision height moreover, and stability is good.

Drawings

Fig. 1 is a first schematic structural view of a continuously variable transmission mechanism in embodiment 1;

fig. 2 is a second schematic structural view of the continuously variable transmission mechanism in embodiment 1;

fig. 3 is a structural schematic diagram three of the continuously variable transmission mechanism in embodiment 1;

fig. 4 is a structural schematic diagram of a continuously variable transmission mechanism in embodiment 1;

FIG. 5 is a schematic structural view of a clutch gear transmission assembly in embodiment 1;

fig. 6 is a schematic structural view of a continuously variable transmission mechanism in embodiment 1;

FIG. 7 is a first schematic structural view of the crank and rocker assembly and the rotating radius adjusting assembly in the embodiment 1;

FIG. 8 is a second schematic structural view of the crank and rocker assembly and the rotating radius adjusting assembly of embodiment 1;

FIG. 9 is a third schematic structural view of the crank and rocker assembly and the rotating radius adjusting assembly of embodiment 1;

fig. 10 is a schematic structural view of a shift drum in embodiment 2.

In the figure: 11. a first support frame; 12. a second support frame; 121. a fixing ring; 13. fixing the 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 supporting seat; 31. an input cylinder; 321. a first integrated loop; 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. inputting a 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 one-way gear assembly; 53. a second one-way 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 loop; 62. a fourth integrated loop; 71. a positioning ring; 711. positioning a rod; 72. positioning the shaft seat; 721. positioning the chute; 73. a slider; 74. adjusting the connecting rod; 751. adjusting the outer ring; 752. a hinged seat; 753. adjusting a threaded sleeve; 76. a lead screw; 761. a sun gear; 762. a planet wheel; 763. a ring gear; 764. adjusting the driving ring; 77. a shift cable; 8. a hub shell.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Example 1:

a stepless speed change mechanism, refer to fig. 1 to 9, which comprises a first support member and a second support member fixedly connected, and further comprises 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 one-way gear transmission assembly carried between the first support member and the second support member, and a rotation radius adjusting assembly carried on the second support member, wherein the one-way gear transmission assembly is used for transmitting the torque of the crank rocker assembly to the output assembly; the crank and rocker assembly in this embodiment comprises a crank guide groove 343, a driving shaft 41, a positioning shaft seat 72, a connecting rod 42 and a rocker gear assembly connected with the one-way 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 coincident rotational central axes; the crank guide groove 343 receives the torque of the input assembly and drives the driving shaft 41 to revolve around the central axis of rotation; the rotation radius adjusting assembly can control the driving shaft 41 to move in the radial direction to adjust the revolution radius of the driving shaft 41; in the embodiment, each component is borne by the first supporting part and the second supporting part which are fixedly connected, and the first supporting part and the second supporting part are also used for mounting and fixing the whole mechanism, and the structural arrangement of the stepless speed change mechanism enables the stepless speed change mechanism in the embodiment to be suitable for riding vehicles, so that the smoothness of speed change in the riding process can be improved, and the riding experience is optimized; meanwhile, in the embodiment, the driving shaft 41 is controlled to move along the radial direction, which is equivalent to changing the length of the crank, so that the swing angle of the rocker is changed, and the purpose of stepless speed change is achieved; the setting of crank rocker subassembly and radius of rotation adjusting part in this embodiment not only conveniently carries out the variable speed and adjusts, is favorable to optimizing the axial dimensions of mechanism moreover to be convenient for match the installation of vehicle of riding.

Referring to fig. 1 to 6, in particular, the first support member in this embodiment includes a first support shaft 21 and a first support 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 the embodiment, the first supporting part and the second supporting part are both of a split structure, so that the production and the assembly are convenient.

Referring to fig. 1 to 9, preferably, the rotation radius adjusting assembly includes an adjusting outer ring 751 movable along the rotation central axis, and an adjusting link 74 is hinged between the driving shaft 41 and the adjusting 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 adjustment outer ring 751 by the adjustment link 74, thereby facilitating adjustment and structural arrangement; preferably, a positioning slide block 73 hinged with the adjusting link 74 is arranged at the end of the driving shaft 41, and a positioning slide slot 721 matched with the positioning slide block 73 is arranged in the positioning shaft seat 72; the positioning slide block 73 and the positioning slide slot 721 are arranged, so that the stability of the driving shaft 41 is improved, and the transmission between the driving shaft 41 and the positioning shaft seat 72 is facilitated; specifically, in the present 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 surface of the second supporting frame 12 is provided with a 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 around the central rotation 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 coincide in the present embodiment, and coincide with the rotation center axis.

Referring to fig. 1 to 9, preferably, the rotating radius adjusting assembly further includes a lead screw 76 rotatably supported on the second support member, and an adjusting screw 753 connected with an adjusting outer ring 751 is sleeved on the lead screw 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 axially; 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 76 is matched with the adjusting screw sleeve 753 to drive the adjusting outer ring 751 to move axially, so that the driving shaft 41 is driven to move radially through the adjusting connecting rod 74; the screw rod 76 and the adjusting threaded sleeve 753 have self-locking performance, and the adjusting outer ring 751 cannot deviate along the axial direction after adjustment, so that the stability of a speed change state is guaranteed; during normal operation, the relative position between 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 driving shaft 41 moves in a radial direction relative to the crank guide 343, i.e. the crank guide 343 arranged in the radial direction provides the driving shaft 41 with the movement amount; preferably, a retainer and balls are arranged between the adjusting outer ring 751 and the adjusting screw sleeve 753, that is, 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 the rotation of the adjusting outer ring 751 can be ensured, and the adjusting accuracy 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 threaded sleeve 753 and the hinge seat 752 can reduce the number of parts and facilitate assembly; of course, in other alternative embodiments, a separate bearing may be disposed between the adjusting outer ring 751 and the adjusting screw sleeve 753, and other structures may be employed between the adjusting outer ring 751 and the adjusting screw sleeve 753 to achieve transmission and limiting, which is not limited herein.

Referring to fig. 1 to 10, preferably, a bearing is provided between the screw 76 and the positioning shaft seat 72; one end of the screw 76 is supported on the second supporting component in a rolling way, and the other end of the screw 76 is supported on the positioning shaft seat 72 in a rolling way, so that the stability of the screw 76 can be improved; the lead screw 76 also plays a supporting role for the positioning shaft seat 72, so that the stability of the positioning shaft seat 72 is improved; preferably, the turning radius adjustment assembly further includes a planetary gear drive assembly for controlling rotation of the lead screw 76; specifically, in the present embodiment, the screw 76 and the second support shaft 22 include coinciding axes, and the inner end of the second support shaft 22 is opposite to the screw 76, with a gap left between the two ends; the planetary gear drive 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 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, an adjustment drive ring 764 for receiving a shift adjustment torque is connected to the ring gear 763; that is, the planet carrier 221 is fixed, and after the adjusting driving ring 764 rotates, the ring gear 763 and the planet gear 762 drive the sun gear 761 to rotate, so as to control the rotation of the lead screw 76; in the embodiment, the planetary gear driving assembly is adopted to drive the screw 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 the present embodiment, the outer side wall of the adjusting driving ring 764 is wound with the speed changing cable 77, and the adjusting driving ring 764 is controlled to rotate by pulling the speed changing cable 77, so as to implement speed changing adjustment; of course, in other alternative embodiments, a motor may be used to drive the adjusting driving ring 764 to rotate in conjunction with a gear structure, a synchronous belt structure, or a chain structure, 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 arranged between the support ring 222 and the screw 76, that is, the screw 76 is supported in a rolling manner; preferably, in this embodiment, the gear ring 763 and the adjusting driving ring 764 are integrally formed to form a fifth integrated ring; the outer side wall of the planet carrier 221 is provided with a support seat 223, and the output assembly comprises an output gear, an output ring and a one-way clutch, wherein the output gear is supported on the outer side wall of the support seat 223 in a rolling manner, the output ring is supported on the outer side wall of the fifth integrated ring in a rolling manner, and the one-way clutch is arranged between the output gear and the output ring; the output gear is used for receiving the torque of the one-way gear transmission assembly; a single-row clutch is arranged between the output gear and the output ring and used for reducing the resistance applied to the vehicle during sliding; 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 to form a third integrated ring 61, and the clutch inner ring and the output ring are integrally formed to form a fourth integrated ring 62; preferably, a bearing is arranged between the output gear and the support base 223, and the third integrated ring 61 is used 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, facilitate assembly and optimize the local radial size; preferably, in this embodiment, an outer spigot matched with the second support frame 12 is formed between the support ring 222 and the support seat 223, 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 connected with the second support frame 12 through the male end and the fastening member, so that the connection stability can be improved; the screw 76 is supported by the support ring 222 and the bearing in a rolling manner in this embodiment, and the assembly can be facilitated.

Referring to fig. 1 to 9, in particular, in the present embodiment, the connecting rod 42, the rocker gear assembly and the one-way gear transmission assembly cooperate to form one transmission set, and the number of the transmission sets is multiple, 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 sets in this embodiment is two, and certainly, in other alternative embodiments, the number of the transmission sets may also be increased, which is not limited herein; specifically, the ends 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 of the connecting rod 42 and the driving shaft 41 in the embodiment; that is, in the present embodiment, one driving shaft 41 simultaneously drives a plurality of transmission sets, thereby facilitating the adjustment of the rotation radius; specifically, in the present 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 that is supported on the supporting rod 45 in a rolling manner, and a rocker 43 hinged to the connecting rod 42 is fixedly disposed on an end surface of the rocker gear 44; preferably, both ends of at least one connecting rod 42 are staggered along the axial direction, and at least two rocker gears 44 are arranged oppositely along the radial direction; in the embodiment, the number of the one-way gear transmission assemblies is two, and the two rocker gears 44 are arranged in a radial opposite manner, that is, 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 one-way gear rotation assemblies is the same, the production and the assembly are convenient, and the optimization of the axial size is facilitated; one end of the connecting rod 42 connected to the driving shaft 41 is positioned as an inner end of the connecting rod, and one end of the connecting rod 42 connected to the rocker 43 is defined as an outer end of the connecting rod; in this embodiment, the connecting rods 42 include a middle inclined section, so that the inner ends of the connecting rods and the outer ends of the connecting rods are axially staggered, and the axial staggering directions of the two connecting rods 42 are opposite, and the purpose of the axial staggering is also 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 other alternative embodiments, the rocker 43 may be designed to be inclined, and is not limited herein.

Referring to fig. 1 to 5, in particular, the unidirectional gear transmission assembly in this embodiment includes a second gear shaft 51 and a third gear shaft 54 respectively supported between the first support frame 11 and the second support frame 12 in a rolling manner, a third gear 511 engaged with the rocker gear 44 is fixedly disposed on the second gear shaft 51, a first unidirectional gear assembly 52 is sleeved on the second gear shaft 51, and a fourth gear 541 engaged with the first unidirectional gear assembly 52 is fixedly disposed on the third gear shaft 54; a sixth gear 543 linked with the third gear shaft 54 along the circumferential direction is sleeved on the third gear shaft; the sixth gear 543 and the fourth gear 541 are respectively located at two sides of the second supporting frame 12, and the output gear is respectively meshed with the two sixth gears 543; preferably, the second gear shaft 51 is further sleeved with a second one-way gear assembly 53, and the transmission direction of the second one-way gear assembly 53 is opposite to that of the first one-way 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 one-way 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 one-way gear assembly and the second one-way gear assembly are adopted to respectively bear two torques with opposite directions in one period of the rocker gear 44, so that the fluctuation of the speed of the rocker can be reduced, and stable output can be obtained; specifically, in the present embodiment, the first one-way gear assembly 52 and the second one-way gear assembly 53 have the same structure, and the first one-way gear assembly 52 is taken as an example to be specifically described; the first one-way gear assembly 52 includes a first one-way gear, a bearing is provided between the first one-way gear and the second gear shaft 51, and the second one-way 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; a clutch outer ring of the one-way clutch is integrally formed on the end surface 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 one-way gear to rotate through the one-way clutch; the structural arrangement of first one-way gear assembly 52 in this embodiment facilitates a reduction in the number of parts, facilitates assembly, and optimizes 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 rollingly supported by the first support member; specifically, a second bearing inner ring 342 is fixedly connected to the inner end surface of the first support shaft 21, and a cage 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 race in the present embodiment, so that the number of parts can be reduced and assembly is facilitated; the cross section of the crank guide groove 343 is U-shaped and is fixedly connected with the end face of the crank gear 341; specifically, in this embodiment, a connecting plate is disposed on an inner side wall of the second bearing inner ring 342, and a fastener connected with the first support shaft 21 is disposed on the connecting plate in a penetrating manner, so that rolling support of the crank gear 341 is facilitated, and a local axial dimension and a local radial dimension are optimized.

Referring to fig. 1 to 9, in particular, the input assembly in the present embodiment includes an input cylinder 31 and an input gear, which are respectively supported on the first support shaft 21 in a rolling manner, and a one-way clutch is disposed between the input cylinder 31 and the input gear; a transmission gear set connected between the input gear and the crank gear 341 is arranged on the first support frame 11; 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 on 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 linked along the circumferential direction; the first gear 331 is engaged with the input gear, and the second gear 332 is engaged with the crank gear 341; preferably, the first support frame 11 is provided with a plurality of transmission gear sets, and specifically, in this embodiment, the first support frame 11 is provided with two transmission gear sets, so as to improve the 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 from the input assembly to the crank rocker assembly is realized; preferably, the one-way clutch includes a clutch inner ring integrally formed on the input cylinder 31, and a clutch outer ring integrally formed on an end surface of the input gear, the clutch outer ring and the input gear forming a first integrated ring 321; a first bearing inner ring 322 is fixedly arranged on the first support shaft 21, 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 size and radial size are optimized; specifically, in this embodiment, a connecting plate that is matched with the outer end face of the support shaft plate 211 is disposed on the inner side wall of the first bearing inner ring 322, and a fastener that is connected with the support shaft plate 211 penetrates through the connecting plate, so that the first bearing inner ring 322 is fixedly mounted; the structural design of the first bearing inner ring 322 is beneficial to optimizing the local axial dimension and radial dimension; in this embodiment, the input cylinder 31, the crank gear 341, the crank guide 343, the positioning shaft seat 72, the positioning ring 71, and the output gear include coincident rotational central axes, thereby facilitating the arrangement on the riding vehicle for transmission.

Example 2:

a shift hub, referring to fig. 1 to 10, which includes the continuously variable transmission mechanism in embodiment 1; also comprises a hub 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 along the circumferential direction, and the rotating speed of the output ring is transmitted to the hub shell 8; the input cylinder 31 is sleeved with an input driving part 35 which is linked along the circumferential direction, and the input driving part 35 can be a chain wheel or a gear; the speed-changing hub in the embodiment can be installed at the center of the rear wheel of the riding vehicle, the first support shaft 21 and the second support shaft 22 are used for being fixedly connected with the frame, the treading power or the auxiliary power is transmitted to the speed-changing hub through the input driving part 35, and the output is realized by the hub shell 8 after the speed change, so that the rear wheel is driven to rotate to drive the vehicle to advance; of course, in other alternative embodiments, the hub shell 8 may be directly used as a part of the output assembly, for example, a ring gear structure engaged with the sixth gear 543 may be provided in the hub shell 8, which is not limited herein.

Example 3:

a vehicle, referring to fig. 1 to 10, which includes a continuously variable transmission mechanism in embodiment 1, or includes a shift hub in embodiment 2; that is, the continuously variable transmission mechanism can form a transmission drum to be mounted on a vehicle and be used as a continuously variable transmission; alternatively, the continuously variable transmission mechanism is used as one transmission device in a vehicle drive system.

Claims

1. A continuously variable transmission mechanism, characterized by comprising:

the first supporting part and the second supporting part are fixedly connected;

the input assembly is borne on the first supporting part;

an output assembly carried on the second support member;

a crank and rocker assembly carried between the first and second support members;

the one-way gear transmission assembly is born between the first supporting component and the second supporting component and is used for transmitting the torque of the crank rocker assembly to the output assembly; and (c) a second step of,

a rotating radius adjustment assembly;

2. The continuously variable transmission mechanism according to claim 1, characterized in that: 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 a positioning guide groove matched with the driving shaft is formed in the side wall of the positioning shaft seat.

3. The continuously variable transmission mechanism according to claim 2, characterized in that: 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.

4. The continuously variable transmission mechanism according to claim 2, characterized in that: the rotating radius adjusting assembly further comprises a lead screw which is supported on the second supporting component in a rolling mode, and an adjusting threaded sleeve connected with an adjusting outer ring is sleeved on the lead screw; the adjusting outer ring can rotate relative to the adjusting threaded sleeve, and the adjusting threaded sleeve can drive the adjusting outer ring to move along the axial direction.

5. The continuously variable transmission mechanism according to claim 4, characterized in that: and a retainer and a ball are arranged between the adjusting outer ring and the adjusting screw sleeve.

6. The continuously variable transmission mechanism according to claim 5, characterized in that: and the outer side wall of the adjusting outer ring is fixedly provided with a hinged seat matched with the adjusting connecting rod.

7. The continuously variable transmission mechanism according to claim 6, characterized in that: the adjusting outer ring and the hinge seat are integrally formed.

8. The continuously variable transmission mechanism according to claim 4, characterized in that: and a bearing is arranged between the lead screw and the positioning shaft seat.

9. The continuously variable transmission mechanism according to claim 1, characterized in that: the positioning shaft seat is fixedly connected with a positioning ring, and the positioning ring is supported on the second supporting component in a rolling manner.

10. The continuously variable transmission mechanism according to claim 4, characterized in that: the rotating radius adjustment assembly also includes a planetary gear drive assembly for controlling rotation of the lead screw.

11. The continuously variable transmission mechanism according to claim 10, wherein: the second support member includes a second support shaft; the planetary gear driving assembly comprises a planet 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 planet carrier; and a gear ring matched with the planet gear is supported on the second support shaft in a rolling way.

12. The continuously variable transmission mechanism according to claim 11, characterized in that: and the gear ring is connected with an adjusting driving ring for receiving the speed-changing adjusting torque.

13. The continuously variable transmission mechanism according to claim 12, wherein: and a speed change inhaul cable is wound on the outer side wall of the adjusting driving ring.

14. The continuously variable transmission mechanism according to claim 12, wherein: and a support ring is arranged at the inner side end of the planet carrier, and a bearing is arranged between the support ring and the screw rod.

15. The continuously variable transmission mechanism according to claim 14, wherein: the gear ring and the adjusting driving ring are integrally formed to form a fifth integrated ring;

the output gear is used for bearing the torque of the one-way gear transmission component.

16. The continuously variable transmission mechanism according to claim 15, 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 to form a third integrated ring, and the clutch inner ring and the output ring are integrally formed to form a fourth integrated ring.

17. The continuously variable transmission mechanism according to claim 16, 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.

18. The continuously variable transmission mechanism according to claim 16, characterized in that: 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.

19. The continuously variable transmission mechanism according to claim 15, characterized in that: the second support component 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.

20. The continuously variable transmission mechanism according to claim 1, characterized in that: the connecting rods, the rocker gear assemblies and the one-way gear transmission assemblies are matched to form a transmission set, and the number of the transmission sets is multiple; the end parts of the connecting rods are sequentially sleeved on the driving shaft along the axial direction;

21. The continuously variable transmission mechanism according to claim 20, wherein: a supporting rod is arranged between the first supporting component and the second supporting component, the rocker gear assembly comprises a rocker gear which is supported on the supporting rod in a rolling manner, and a rocker hinged with the connecting rod is fixedly arranged on the end face of the rocker gear.

22. The continuously variable transmission mechanism according to claim 21, wherein: at least two rocker gears are arranged in a radial direction opposite to each other.

23. The continuously variable transmission mechanism according to claim 21, characterized in that: the one-way 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 one-way gear assembly is sleeved on the second gear shaft, and a fourth gear meshed with the first one-way gear assembly is fixedly arranged on the third gear shaft; the third gear shaft is sleeved with a sixth gear which is linked with the third gear shaft along the circumferential direction, and the output assembly comprises output gears which are respectively meshed with the sixth gears.

24. The continuously variable transmission mechanism according to claim 23, wherein: a second one-way gear assembly is further sleeved on the second gear shaft, 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 supported between the first supporting component and the second supporting component in a rolling manner, a seventh gear meshed with the second one-way 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.

25. The continuously variable transmission mechanism according to claim 23, wherein: the first one-way gear assembly comprises a first one-way gear, a bearing is arranged between the first one-way gear and the second gear shaft, and the second one-way 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; and a clutch outer ring of the one-way clutch is integrally formed on the end surface of the first one-way gear.

26. The continuously variable transmission mechanism according to claim 1, characterized in that: the crank guide groove is fixedly connected with a crank gear, and the crank gear is supported on the first supporting component in a rolling mode.

27. The continuously variable transmission mechanism according to claim 26, wherein: 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.

28. The continuously variable transmission mechanism according to claim 26, wherein: the first support component comprises a first support shaft and a first support frame which are fixedly connected, the input component comprises an input cylinder and an input gear which are respectively supported on the first support shaft in a rolling way, 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 manner, a first gear and a second gear which are respectively positioned on 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 linked along the circumferential direction;

29. The continuously variable transmission mechanism according to claim 28, wherein: and the first support frame is provided with a plurality of transmission gear sets.

30. The continuously variable transmission mechanism according to claim 28, wherein: the one-way clutch comprises a clutch inner ring and a clutch outer ring, wherein the clutch inner ring is integrally formed on the input cylinder, the clutch outer ring is integrally formed on the end face of the input gear, and the clutch outer ring and the input gear form a first integrated ring; a first bearing inner ring is fixedly arranged on the first support shaft, and a retainer and balls are arranged between the first bearing inner ring and the first integrated ring.

31. A variable speed hub, comprising: comprising a continuously variable transmission mechanism as claimed in any of claims 1 to 30.

32. A vehicle, characterized in that: comprising a continuously variable transmission mechanism as claimed in any of claims 1 to 30.