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CN-121990100-A - Stepless speed change method for inclined shaft neck, gearbox and bicycle

CN121990100ACN 121990100 ACN121990100 ACN 121990100ACN-121990100-A

Abstract

S1, a speed change mechanism drives a linkage rod to move so that the linkage rod drives a linkage frame body to move along an inclined journal; the stepless speed change method for the inclined shaft neck, the gearbox and the bicycle are characterized in that the movement stroke of a driving member is directly converted into the movement stroke of a linked rack, the middle link of the speed change process is reduced, the movement is directly converted through the linked member, and the smooth and stable stepless speed change is realized by acting on the rotary cylinder through the output gear assembly.

Inventors

  • LI LIAN
  • ZHANG YI

Assignees

  • 成都孚凯伊科技有限公司

Dates

Publication Date
20260508
Application Date
20260130
Priority Date
20250909

Claims (10)

  1. 1. The stepless speed change method for the inclined shaft neck is characterized by comprising a rotary box body (1), wherein the rotary box body (1) comprises fixed side plates (12) and a rotary cylinder body (11), the rotary cylinder body (11) is rotatably arranged on a group of fixed side plates (12), a speed change mechanism (6), a linkage member (5), a driving member (2), a transmission gear assembly (3) and an output gear assembly (4) are further arranged in an installation cavity formed by the fixed side plates (12) and the rotary box body (1), and the driving member (2) comprises an inclined shaft neck (22); The linkage member (5) comprises a linkage frame body (51), wherein a linkage rack (52) and a linkage rod (53) are fixedly arranged on the linkage frame body (51), the linkage rack (52) and the linkage rod (53) are arranged in parallel, the speed change mechanism (6) is in driving connection with the linkage rod (53), the linkage rack (52) is in driving connection with the transmission gear assembly (3), the transmission gear assembly (3) is in driving connection with the output gear assembly (4), the output gear set (4) is in driving connection with the rotary cylinder body (11), the inclined shaft neck (22) is in driving connection with the linkage frame body (51), and the linkage frame body (51) is slidably mounted on the speed change mechanism (6), and the following steps are achieved: S1, a speed change mechanism (6) drives a linkage rod (53) to move, so that the linkage rod (53) drives a linkage frame body (51) to move along an inclined shaft neck (22); s2, after the linkage frame body (51) moves, the driving point position of the linkage frame body (51) driven by the inclined shaft journal (22) is changed, and then the stroke of the movement of the linkage frame body (51) driven by the inclined shaft journal (22) is changed; s3, changing the movement stroke of the linkage frame body (51) in unit time to change the output speed of the linkage rack (52) driving transmission gear assembly (3); S4, changing the output speed of the transmission gear assembly (3) so as to change the output speed of the output gear assembly (4), and further changing the rotation speed of the rotary cylinder (11) at the fixed side plate (12) to realize the speed change of the rotary cylinder (11); When the gear change is needed, the gear change mechanism (6) can drive the linkage rod (53) to drive the linkage frame body (51) to move back and forth along the inclined shaft neck (22) and to stay at any position of the inclined shaft neck (22), and the stroke of the inclined shaft neck (22) for driving the linkage rack (52) to move is increased or shortened, so that the rotating speed of the rotating cylinder (11) is increased or reduced, and the stepless gear change is realized.
  2. 2. The stepless speed change method for the inclined shaft neck according to claim 1, wherein the driving member (2) further comprises a driving fluted disc (24), one end of the inclined shaft neck (22) is connected with a connecting piece (21), the other end of the inclined shaft neck (22) is rotationally connected with the rotating box body (1) by adopting a rotating shaft seat (23), the driving fluted disc (24) is concentrically arranged with the connecting piece (21), and the driving fluted disc (24) is positioned outside an installation cavity; During operation, the driving fluted disc (24) drives the connecting piece (21) and then drives the circular motion of the inclined shaft neck (22), the inclined shaft neck (22) drives the linkage frame body (51) and the linkage rack (52) to move, so that the linkage rack (52) drives the transmission gear assembly (3) to rotate, and the transmission gear assembly (3) drives the output gear assembly (4) to rotate.
  3. 3. A method of continuously variable transmission of tilting journals according to claim 2, characterized in that the connecting piece (21), the tilting journal (22) and the swivel shaft mount (23) are of one-piece construction.
  4. 4. The stepless speed change method for the inclined shaft neck according to claim 1, wherein the rotary box body (1) further comprises a rotary shaft sleeve (14) and a rotary toothed ring (13), the rotary cylinder body (11) is rotatably arranged on a group of fixed side plates (12) through the rotary shaft sleeve (14), the rotary toothed ring (13) is arranged on the inner wall of the rotary shaft sleeve (14), and the rotary toothed ring (13) is in driving connection with the output gear assembly (4).
  5. 5. The stepless speed change method of the inclined shaft neck according to claim 1, wherein the linkage frame body (51) is provided with a sliding groove (511), the inclined shaft neck (22) penetrates through the sliding groove (511), and the inclined shaft neck (22) penetrates through the sliding groove (511) to be in sliding contact with the inner wall of the sliding groove (511); When in speed change, the speed change mechanism (6) drives the linkage rod (53) and the linkage frame body (51) to move, so that the linkage frame body (51) moves to change the driving point positions of the linkage frame body (51) and the inclined shaft neck (22), when the inclined shaft neck (22) is in different driving point positions, the diameter of the inclined shaft neck (22) in circular movement is also different, and then the inclined shaft neck (22) drives the linkage frame body (51) and the linkage rack (52) to obtain different movement amplitudes, so that the speed change driven by the linkage rack (52) is realized.
  6. 6. The tilting journal stepless speed change method according to claim 5, wherein the sliding groove (511) is a linear bar-shaped groove, and the extending direction of the sliding groove (511) is perpendicular to the extending direction of the linked rack (52).
  7. 7. A tilting journal infinitely variable method according to claim 1, characterized in that the transmission gear assembly (3) comprises a first rotating shaft (31) and a second rotating shaft (32) rotatably provided on the fixed side plate (12), a first gear (33) and a first ratchet mechanism (34) are coaxially provided on the first rotating shaft (31), a second gear (35) and a second ratchet mechanism (36) are coaxially provided on the second rotating shaft (32), and the central axis of the first rotating shaft (31) and the central axis of the second rotating shaft (32) are both parallel to the central axis of the connecting piece (21); the first gear (33) and the second gear (35) are always meshed with the linkage rack (52), and the ratchet wheel of the first ratchet mechanism (34) and the ratchet wheel of the second ratchet mechanism (36) are always meshed with the output gear assembly (4).
  8. 8. The stepless speed change method for the inclined shaft neck according to claim 1, wherein the speed change mechanism (6) comprises a speed change driving piece (61), a screw rod mechanism (63) and a speed change adjusting block (62), the screw rod sliding frame (63) is erected between a group of fixed side plates (12), the speed change driving piece (61) is in driving connection with the screw rod mechanism (63), the screw rod mechanism (63) is in driving connection with the speed change adjusting block (62), the linkage rod (53) is slidably mounted on the speed change adjusting block (62), and the sliding direction of the linkage rod (53) is perpendicular to the moving direction of the speed change adjusting block (62) for driving the linkage rod (53); During speed change, the speed change driving piece (61) drives the screw rod of the screw rod mechanism (63) to rotate, the screw rod drives the screw rod nut to drive the speed change adjusting block (62) to move, the speed change adjusting block (62) drives the linkage rod (53) to move so as to change the driving point position of the linkage frame body (51) and the driving component (2), the moving stroke of the linkage rack (52) is changed, and the speed change of the transmission gear assembly (3) and the output gear assembly (4) is realized by the change of the stroke of the linkage rack (52).
  9. 9. The tilting journal stepless speed change box is characterized by comprising a rotating box body (1), wherein the rotating box body (1) comprises fixed side plates (12) and a rotating cylinder body (11), the rotating cylinder body (11) is rotatably arranged on a group of fixed side plates (12), a speed change mechanism (6), a linkage member (5), a driving member (2), a transmission gear assembly (3) and an output gear assembly (4) are further arranged in an installation cavity enclosed by the fixed side plates (12) and the rotating box body (1), and the driving member (2) comprises a tilting journal (22); The linkage member (5) comprises a linkage frame body (51), a linkage rack (52) and a linkage rod (53) are fixedly arranged on the linkage frame body (51), the linkage rack (52) and the linkage rod (53) are arranged in parallel, the speed change mechanism (6) is in driving connection with the linkage rod (53), the linkage rack (52) is in driving connection with the transmission gear assembly (3), the transmission gear assembly (3) is in driving connection with the output gear assembly (4), the output gear set (4) is in driving connection with the rotary cylinder body (11), the inclined shaft neck (22) is in driving connection with the linkage frame body (51), and the linkage frame body (51) is slidably mounted on the speed change mechanism (6).
  10. 10. A tilting journal infinitely variable bicycle, characterized in that the bicycle comprises a tilting journal infinitely variable transmission as claimed in claim 9, wherein the fixed side plate (12) is mounted on the frame (8), and the rotary cylinder (11) is rotatably mounted on the fixed side plate (12).

Description

Stepless speed change method for inclined shaft neck, gearbox and bicycle Technical Field The invention relates to the technical field of stepless speed change, in particular to a stepless speed change method of an inclined shaft neck, a gearbox and a bicycle. Background In a bicycle shifting system, a drum stick type gear shifting mechanism is adopted, and with technology upgrading, although the technology is used for experiencing nearly stepless speed change, the actual gear is still a plurality of fixed gear levels, and linear and smooth speed change experience cannot be realized on complex road expansion or special sport scene requirements. The design, processing and maintenance technologies and costs of the traditional stepless speed change mechanism are quite high, and important performance indexes such as torque, rotating speed, transmission efficiency and the like are greatly limited. The invention patent 201410304320.6 discloses a gradient crank drive stepless speed change device, wherein the middle part of the gradient crank is provided with a bevel sliding sleeve, the bevel sliding sleeve is connected with a connecting rod through a bearing, a speed regulating rod is arranged in the movable range of the connecting rod, the speed regulating rod is arranged in a shell through a sliding block and a sliding strip, the other end of the connecting rod is connected with a toothed plate through a connecting rod pin and a U-shaped connecting seat, racks are arranged on two sides of the toothed plate, each rack is matched with one-way teeth, the one-way teeth are connected with an output gear through a connecting shaft, and a driven output gear meshed with the driving output gear is connected with an output shaft. The technology firstly converts the rotary motion of an input end into linear motion with adjustable reciprocating stroke amplitude, then converts the reciprocating linear motion into rotary motion, and outputs the rotary motion from an output end to realize stepless speed change. However, in the above scheme, although a continuously variable transmission design is disclosed, the running stability is relatively poor, a link pin with higher degree of freedom still exists between the connecting rod and the rack, the link pin and the joint bear the function of converting rotary motion into linear motion, part of force is acted on the toothed plate instead of directly acting on the rack in the action of the inclined crankshaft driving connecting rod, so that power loss is caused, the stability and the service life of the reciprocating motion of the toothed plate are further damaged, and in general, the scheme has the problems of poor power loss and poor stability and has a large improvement space as a whole. Accordingly, there is a need to provide a solution to overcome the above technical problems. Disclosure of Invention The invention aims to provide a stepless speed change method of an inclined shaft neck, a gearbox and a bicycle, which directly convert the motion travel change of a driving member into the change of the motion travel of a linked rack, reduce intermediate links in the speed change process, act on a rotary cylinder body through an output gear assembly and realize smooth and stable stepless speed change. In order to achieve the above object, the present invention provides the following technical solutions; the stepless speed change method for the inclined shaft neck comprises a rotary box body, wherein the rotary box body comprises fixed side plates and a rotary cylinder body, and the rotary cylinder body is rotatably arranged on one group of fixed side plates; The linkage member comprises a linkage frame body, wherein a linkage rack and a linkage rod are fixedly arranged on the linkage frame body, the linkage rack and the linkage rod are arranged in parallel, the speed change mechanism is in driving connection with the linkage rod, the linkage rack is in driving connection with a transmission gear assembly, the transmission gear assembly is in driving connection with an output gear assembly, the output gear set is in driving connection with a rotating cylinder body, an inclined shaft neck is in driving connection with the linkage frame body, and the linkage frame body is slidably arranged on the speed change mechanism, and the steps are as follows: The speed change mechanism drives the linkage rod to move so that the linkage rod drives the linkage frame body to move along the inclined shaft neck, the driving point position of the inclined shaft neck driving the linkage frame body is changed after the linkage frame body moves, and then the movement stroke of the inclined shaft neck driving the linkage frame body is changed, the speed of the linkage rack driving the transmission gear assembly to output is changed after the movement stroke of the linkage frame body in unit time is changed, the speed of the transmission gear assembly to output is changed after the movement of the linkag