Continuously variable transmission and bicycle

Abstract

The invention provides a continuously variable transmission and a bicycle. The continuously variable transmission comprises a base, a first power wheel, a variable speed generation wheel, a speed regulation wheel and a first locking piece. The first locking piece is assembled on the speed change generation wheel in a sliding mode in the circumferential direction of the base and connected to the first power wheel in a sliding mode in the radial direction of the base, and the first locking piece is fixed to the speed change generation wheel in the radial direction of the base and fixed to the first power wheel in the circumferential direction of the base. Under the condition that the speed of the first power wheel is constant, the eccentric distance of the speed change generation wheel relative to the first power wheel can be changed by adjusting the speed adjusting wheel, so that the rotating speed of the speed change generation wheel is changed, stepless speed change is achieved, and the requirement for personalized adjustment of treading force during riding is met. In addition, non-friction continuous stepless speed change can be achieved through the stepless speed changer, the transmission torque is large, and the transmission efficiency is high. The speed can be changed in a static state, a rotating state and a riding state, speed regulation is convenient, the weight is light, and the size is small.

Description

Technical Field

[0001] The invention relates to the technical field of bicycles, and in particular to a continuously variable transmission and a bicycle. Background Art

[0002] In the related art, a step-type transmission is used on a bicycle or a power-assisted bicycle, which is divided into two types: internal transmission and external transmission. Both transmissions have limited fixed gears, and the pedaling force is often too large when shifting up a gear, and too small when shifting down a gear, which cannot meet people's personalized adjustment needs for pedaling force when riding. In addition, the internal transmission is heavy, and the chain is easily dropped when shifting the external transmission, resulting in certain defects in the transmission on the bicycle or power-assisted bicycle. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a continuously variable transmission and a bicycle, aiming to solve the problem in the related art that the stepless transmission used in the bicycle cannot meet the demand for personalized adjustment of the pedaling force.

[0004] In order to solve the above technical problems, the present invention provides a continuously variable transmission in a first aspect, comprising:

[0005] Pedestal;

[0006] A first power wheel, rotatably disposed on the outer side of the base, wherein the first power wheel is coaxially disposed with the base;

[0007] A speed-changing generating wheel is rotatably arranged outside the base and located on one side of the first power wheel. The speed-changing generating wheel is slidably assembled on the base along the radial direction of the base. The rotating shaft between the speed-changing generating wheel and the base is parallel to or coaxial with the central axis of the base.

[0008] a speed regulating wheel, rotatably disposed on the base, the speed regulating wheel being connected to the speed-changing generating wheel, and the speed regulating wheel being used to drive the speed-changing generating wheel to slide, so that the speed-changing generating wheel is eccentrically disposed relative to the first power wheel; and

[0009] A first locking member is slidably assembled on the speed-changing generating wheel along the circumferential direction of the base and is slidably connected to the first power wheel along the radial direction of the base. The first locking member is fixed to the speed-changing generating wheel in the radial direction of the base and to the first power wheel in the circumferential direction of the base. A plurality of the first locking members are provided. The plurality of the first locking members are distributed in the circumferential direction of the speed-changing generating wheel and enclose a concentric circle coaxially arranged with the speed-changing generating wheel.

[0010] Among them, the first locking member has a locked state in which it can be fixed to the speed generating wheel along a first direction, and an unlocked state in which it can slide relative to the speed generating wheel along a second direction. The first direction is opposite to the second direction. When the speed generating wheel is eccentric relative to the first power wheel and each of the first locking members slides along the first direction, only the first locking member with the largest linear velocity is fixed to the speed generating wheel.

[0011] Optionally, a first annular mounting groove is provided on a side of the speed change generating wheel close to the first power wheel, the first mounting groove is coaxially arranged with the speed change generating wheel, and a plurality of the first locking members are slidably assembled in the first mounting groove;

[0012] A first connecting groove is provided on one side of the first power wheel close to the speed generating wheel, and the length of the first connecting groove extends along the radial direction of the base. A plurality of first connecting grooves are provided, and the plurality of first connecting grooves are spaced apart around the central axis of the first power wheel, and a plurality of first locking members are slidably connected to the plurality of first connecting grooves in a one-to-one manner.

[0013] Optionally, the first locking member includes:

[0014] A first sliding seat, slidably assembled in the first mounting groove, the first sliding seat is provided with a first accommodating groove, the first mounting groove is provided with a first inner side wall and a first outer side wall which are relatively distributed, the notch of the first accommodating groove is arranged opposite to the first outer side wall, the two sides of the first sliding seat are adapted to the first inner side wall and the first outer side wall, and the first sliding seat abuts against the first inner side wall;

[0015] A first guide portion is fixed to a bottom wall of the first sliding seat that is arranged opposite to the notch of the first receiving groove, and a first guide slope is provided on one side of the first guide portion that is arranged opposite to the notch of the first receiving groove, and the first guide slope is inclined from the top end to the bottom end along the first direction;

[0016] A first locking portion is received in the first receiving groove, one side of the first locking portion is slidably mounted on the first guide inclined surface, and the other side of the first locking portion abuts against the first outer side wall, and the side of the first locking portion that contacts the first outer side wall is adapted to the first outer side wall; and

[0017] The first elastic member is accommodated in the first accommodating groove, one end of the first elastic member is connected to the first locking portion, and the other end is connected to the first sliding seat, and the first elastic member is used to provide elastic force to drive the first locking portion to move toward the top of the first guide slope.

[0018] Optionally, the continuously variable transmission further comprises an eccentric seat, the eccentric seat is sleeved on the outer side of the base and slidably assembled on the base along the radial direction of the base, the speed change generating wheel is rotatably arranged on the outer side of the eccentric seat, and the speed change generating wheel is fixed to the eccentric seat in the radial direction of the base;

[0019] The eccentric seat is provided with a first transmission structure, and the speed regulating wheel is provided with a second transmission structure. The first transmission structure and the second transmission structure cooperate with each other so that the speed regulating wheel drives the eccentric seat to slide relative to the base.

[0020] Optionally, the first transmission structure includes a first transmission gear, and the first transmission gear is fixed on the speed regulating wheel;

[0021] The second transmission structure comprises a transmission rack, the transmission rack is fixed on the eccentric seat, and the length of the transmission rack extends along the radial direction of the base, and the first transmission gear is meshed with the transmission rack.

[0022] Optionally, a clearance through hole is provided on the eccentric seat, and the length of the clearance through hole extends along the radial direction of the base;

[0023] A notch is provided on the peripheral surface of the base, the base is slidably assembled in the clearance through hole, and the notch is at least partially located in the clearance through hole.

[0024] Optionally, the continuously variable transmission further comprises:

[0025] a second power wheel, rotatably disposed outside the base and located on a side of the speed-changing generating wheel away from the first power wheel, the second power wheel being coaxially disposed with the base; and

[0026] A second locking member is slidably assembled on the speed-changing generating wheel along the circumferential direction of the base and is slidably connected to the second power wheel along the radial direction of the base. The second locking member is fixed to the speed-changing generating wheel in the radial direction of the base and to the second power wheel in the circumferential direction of the base. A plurality of second locking members are provided. The plurality of second locking members are distributed in the circumferential direction of the speed-changing generating wheel and enclose a concentric circle coaxially arranged with the speed-changing generating wheel.

[0027] Among them, the second locking member has a locked state in which it can be fixed to the speed change generating wheel along the first direction, and an unlocked state in which it can slide relative to the speed change generating wheel along the second direction. When the speed change generating wheel is eccentric relative to the second power wheel and each of the second locking members slides along the first direction, only the second locking member with the largest linear velocity is fixed to the speed change generating wheel.

[0028] Optionally, a second annular mounting groove is provided on a side of the speed change generating wheel close to the second power wheel, the second mounting groove is coaxially arranged with the speed change generating wheel, and a plurality of the second locking members are slidably assembled in the second mounting groove;

[0029] The second power wheel is provided with second connecting grooves on both sides close to the speed generating wheel, and the length of the second connecting grooves extends along the radial direction of the base. There are multiple second connecting grooves, and the multiple second connecting grooves are spaced apart around the central axis of the second power wheel, and the multiple second locking members are slidably connected to the multiple second connecting grooves one by one.

[0030] Optionally, the second locking member includes:

[0031] A second sliding seat is slidably assembled in the second mounting groove, the second sliding seat is provided with a second accommodating groove, the second mounting groove is provided with a second inner side wall and a second outer side wall which are relatively distributed, the notch of the second accommodating groove is arranged opposite to the second outer side wall, the two sides of the second sliding seat are adapted to the second inner side wall and the second outer side wall, and the second sliding seat abuts against the second inner side wall;

[0032] A second guide portion is fixed to a bottom wall of the second sliding seat that is arranged opposite to the notch of the second receiving groove, and a second guide slope is provided on one side of the second guide portion that is arranged opposite to the notch of the second receiving groove, and the second guide slope is inclined from the top end to the bottom end along the second direction;

[0033] A second locking portion is received in the second receiving groove, one side of the second locking portion is slidably mounted on the second guide inclined surface, and the other side of the second locking portion abuts against the second outer side wall, and the side of the second locking portion that contacts the second outer side wall is adapted to the second outer side wall; and

[0034] The second elastic member is accommodated in the second accommodating groove, one end of the second elastic member is connected to the second locking portion, and the other end is connected to the second sliding seat, and the second elastic member is used to provide elastic force to drive the second locking portion to move toward the top of the second guide slope.

[0035] A second aspect of the present invention provides a bicycle comprising the continuously variable transmission as described above.

[0036] Compared with the related art, the continuously variable transmission and bicycle of the present invention have the following beneficial effects: the eccentric distance of the speed-changing generating wheel relative to the first power wheel can be changed by adjusting the speed regulating wheel under the condition that the speed of the first power wheel is constant, so as to change the rotation speed of the speed-changing generating wheel, thereby realizing continuously variable speed change and meeting the personalized adjustment requirements for pedaling force during riding. In addition, the continuously variable transmission can realize non-friction continuous continuously variable speed change, with large transmission torque and high transmission efficiency; the speed can be changed in the stationary state, rotating state and riding state, and the speed regulation is convenient, and the weight is light and the volume is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 It is a schematic structural diagram of a continuously variable transmission provided by an embodiment of the present invention when the speed-changing generating wheel is not offset;

[0039] Figure 2 It is a schematic structural diagram of a continuously variable transmission provided by an embodiment of the present invention when a wheel offset occurs during a speed change;

[0040] Figure 3 is an exploded view of a continuously variable transmission provided by an embodiment of the present invention;

[0041] Figure 4 yes Figure 3 Exploded view of detail A;

[0042] Figure 5 is a schematic diagram of the distribution of the first locking members when the gear shifting occurs when the wheel is offset according to an embodiment of the present invention;

[0043] Figure 6 is a schematic diagram of the distribution of the first locking members when the speed change generating wheel is not offset provided by an embodiment of the present invention;

[0044] Figure 7 is a schematic structural diagram of a first locking member provided in an embodiment of the present invention;

[0045] Figure 8 is a cross-sectional view of a first locking member provided in an embodiment of the present invention;

[0046] Fig. 9 is a schematic structural diagram of a second locking member provided in an embodiment of the present invention;

[0047] Fig.10 is a cross-sectional view of a second locking member provided in an embodiment of the present invention.

[0048] In the accompanying drawings, each figure number represents: 1, base; 11, notch; 12, support plate; 2, first power wheel; 21, first connecting groove; 3, speed generating wheel; 31, first mounting groove; 311, first inner wall; 312, first outer wall; 32, second mounting groove; 321, second inner wall; 322, second outer wall; 4, speed regulating wheel; 41, first transmission gear; 42, second transmission gear; 5, first locking member; 51, first sliding seat; 511, first accommodating groove; 52, first guide portion; 521, first guide slope; 53, first locking portion; 54, first elastic member; 55, first connecting portion; 56, first protective cover; 57, first Friction block; 6. eccentric seat; 61. transmission rack; 62. give way hole; 7. second power wheel; 71. second connecting groove; 8. second locking member; 81. second sliding seat; 811. second accommodating groove; 82. second guide part; 821. second guide slope; 83. second locking part; 84. second elastic member; 85. second connecting part; 86. second protective sleeve; 87. second friction block; 9. first inner friction ring; 10. first outer friction ring; 20. first limiting ring; 30. second inner friction ring; 40. second outer friction ring; 50. second limiting ring; 60. first bearing; 70. second bearing; 80. third bearing; 90. fourth bearing. DETAILED DESCRIPTION

[0049] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0052] Example:

[0053] An embodiment of the present invention provides a bicycle, comprising a bicycle body and a continuously variable transmission, wherein the continuously variable transmission is arranged on the bicycle body, and the continuously variable transmission can be adjusted quickly to a required speed ratio within a speed range when the bicycle is in a stopped state, a riding state, and a gliding state.

[0054] See also Figures 1 to 10 The continuously variable transmission comprises a base 1, a first power wheel 2, a speed generating wheel 3, a speed regulating wheel 4 and a first locking member 5. The first power wheel 2 is rotatably arranged on the outside of the base 1, and the first power wheel 2 is coaxially arranged with the base 1, that is, the first power wheel 2 is sleeved on the outside of the base 1 and can rotate around the central axis of the base 1. The speed generating wheel 3 is rotatably arranged on the outside of the base 1 and is located on one side of the first power wheel 2. The speed generating wheel 3 is slidably assembled on the base 1 along the radial direction of the base 1. The rotating shaft between the speed generating wheel 3 and the base 1 is parallel or coaxial with the central axis of the base 1, that is, the speed generating wheel 3 is sleeved on the outside of the base 1, and the speed generating wheel 3 can rotate around the central axis of the base 1 or slide relative to the base 1 along the radial direction of the base 1. The speed regulating wheel 4 is rotatably arranged on the base 1, and the speed regulating wheel 4 is connected to the speed generating wheel 3. The speed regulating wheel 4 is used to drive the speed generating wheel 3 to slide, so that the speed generating wheel 3 is eccentrically arranged relative to the first power wheel 2. The first locking member 5 is slidably assembled on the speed generating wheel 3 along the circumferential direction of the base 1 and is slidably connected to the first power wheel 2 along the radial direction of the base 1. The first locking member 5 is fixed to the speed generating wheel 3 in the radial direction of the base 1, and is fixed to the first power wheel 2 in the circumferential direction of the base 1, so that when the first power wheel 2 rotates, the speed generating wheel 3 can be driven to rotate by the first locking member 5, and the speed generating wheel 3 can drive the first locking member 5 to move to an eccentric setting relative to the first power wheel 2; the first locking member 5 is provided with a plurality of The first locking members 5 are distributed in the circumferential direction of the speed shift generating wheel 3 and enclose a concentric circle coaxially arranged with the speed shift generating wheel 3; wherein the first locking member 5 has a locked state in which it can be fixed to the speed shift generating wheel 3 along a first direction, and an unlocked state in which it can slide relative to the speed shift generating wheel 3 along a second direction, the first direction is opposite to the second direction, and when the speed shift generating wheel 3 is eccentric relative to the first power wheel 2 and when each of the first locking members 5 slides along the first direction, only the first locking member 5 with the largest speed is fixed to the speed shift generating wheel 3.

[0055] When the speed regulating wheel 4 is adjusted to drive the speed generating wheel 3 to move a certain distance along the radial direction of the base 1, the speed generating wheel 3 is eccentrically arranged relative to the first power wheel 2, and the concentric circles formed by the first locking members 5 and coaxially arranged with the speed generating wheel 3 are eccentrically arranged relative to the first power wheel 2. At this time, the first power wheel 2 is driven to rotate in the first direction, the first locking members 5 follow the first power wheel 2 to rotate in the first direction and drive the speed generating wheel 3 to rotate in the first direction, and the first locking members 5 can continuously change the linear velocity and angular velocity on the speed generating wheel 3, only the first locking member 5 with the largest linear velocity is fixed to the speed generating wheel 3, and the remaining first locking members 5 follow the speed generating wheel 3, and the speed generating wheel 3 rotates synchronously with the first locking member 5 with the largest linear velocity, so that the eccentric distance of the speed generating wheel 3 relative to the first power wheel 2 can be changed by adjusting the speed regulating wheel 4, and the maximum linear velocity of the first locking members 5 can be changed, so that the rotation speed of the speed generating wheel 3 changes, and the rotation speed adjustment of the speed generating wheel 3 is completed. Therefore, the eccentric distance of the speed-changing generating wheel 3 relative to the first power wheel 2 can be changed by adjusting the speed regulating wheel 4 when the speed of the first power wheel 2 is constant, so as to change the rotation speed of the speed-changing generating wheel 3, thereby realizing stepless speed change and meeting the personalized adjustment requirements of the pedaling force during riding. In addition, the continuously variable transmission can realize non-friction continuous stepless speed change, with large torque transmission and high transmission efficiency; it can change speed in the stationary state, rotating state and riding state, with convenient speed regulation, light weight and small size.

[0056] It should be noted that the first direction may be clockwise, and the second direction may be counterclockwise. One of the first power wheel 2 and the speed change generating wheel 3 is a speed input wheel, and the other is a speed output wheel. For example, the first power wheel 2 is an input wheel, and the speed change generating wheel 3 is an output wheel.

[0057] It should be understood that the first power wheel 2, the first locking member 5 and the speed shift generating wheel 3 constitute an overrunning clutch; wherein, taking the first power wheel 2 as the speed input wheel as an example, when the first power wheel 2 rotates clockwise, all the first locking members 5 rotate clockwise with the first power wheel 2, and all the first locking members 5 are fixed to the speed shift generating wheel 3, and the speed shift generating wheel 3 rotates clockwise at this time; when the first power wheel 2 rotates counterclockwise, all the first locking members 5 rotate counterclockwise with the first power wheel 2, and all the first locking members 5 can slide relative to the speed shift generating wheel 3, and the speed shift generating wheel 3 remains stationary at this time.

[0058] See also Figures 3 to 6, a first annular mounting groove 31 is provided on the side of the speed change generating wheel 3 close to the first power wheel 2, the first mounting groove 31 is coaxially arranged with the speed change generating wheel 3, and a plurality of first locking members 5 are slidably assembled in the first mounting groove 31; wherein, the first locking member 5 is arranged in the first mounting groove 31, which can ensure that the first locking member 5 slides along the circumferential direction of the base 1, and can also ensure that the first locking member 5 is fixed to the speed change generating wheel 3 in the radial direction of the base 1. A first connecting groove 21 is provided on the side of the first power wheel 2 close to the speed change generating wheel 3, and a plurality of first connecting grooves 21 are provided, and the plurality of first connecting grooves 21 are spaced apart around the central axis of the first power wheel 2, and the plurality of first locking members 5 are slidably connected to the plurality of first connecting grooves 21 in a one-to-one correspondence; wherein, the first locking member 5 is arranged in the first connecting groove 21, which can ensure that the first locking member 5 slides along the radial direction of the base 1, and can also ensure that the first locking member 5 is fixed to the first power wheel 2 in the circumferential direction of the base 1.

[0059] See also Figure 4 and Figure 5 In a specific example, eight first locking members 5 may be provided, and eight first connecting grooves 21 evenly spaced are provided on the first power wheel 2. The eight first locking members 5 are distributed in the first installation groove 31, and the eight first locking members 5 are slidably assembled in the eight first connecting grooves 21 in a one-to-one correspondence. The angles between any two adjacent first locking members 5 are different, and there are countless angles between the two adjacent first locking members 5. When the speed change generating wheel 3 and the first power wheel 2 are eccentrically arranged, the first power wheel 2 is rotated clockwise, and the first power wheel 2 drives the first locking members 5 to rotate. The eight first locking members 5 undergo continuous linear velocity changes and angular velocity changes in the first installation groove 31, and only the first locking member 5 with the largest linear velocity is fixed to the speed change generating wheel 3, and the remaining seven first locking members 5 follow in the first installation groove 31. The first power wheel 2 is rotated continuously, and the linear velocity of each first locking member 5 changes continuously. The first locking member 5 at the maximum linear velocity will automatically lock the speed change generating wheel 3 to relay the speed change generating wheel 3 to rotate, thereby completing the speed change.

[0060] The principle of continuously variable speed change is explained below:

[0061] See also Figure 5 and Figure 6 , the minimum angle between two adjacent first locking members 5 is N, the maximum angle is M (M is greater than N), the value of M divided by N is the maximum speed range, and the eccentric distance between the speed change generating wheel 3 and the first power wheel 2 determines the maximum speed ratio. In the process of two adjacent first locking members 5 sliding counterclockwise from the minimum angle N to the maximum angle M, the angle between the two adjacent first locking members 5 will continuously increase from N to M to form countless angles, thereby forming a stepless speed change.

[0062] See also Figure 4 , Figure 7 and Figure 8 The first locking member 5 includes a first sliding seat 51, a first locking portion 53, a first elastic member 54 and a first guide portion 52. The first sliding seat 51 is slidably assembled in the first mounting groove 31. The first sliding seat 51 is provided with a first accommodating groove 511. The first mounting groove 31 is provided with a first inner side wall 311 and a first outer side wall 312 which are relatively distributed. The notch of the first accommodating groove 511 is arranged opposite to the first outer side wall 312. Both sides of the first sliding seat 51 are adapted to the first inner side wall 311 and the first outer side wall 312, which is conducive to the first sliding seat 51 sliding in the first mounting groove 31, and the first sliding seat 51 abuts against the first inner side wall 311. The first guide portion 52 is fixed to the bottom wall of the first sliding seat 51 and the notch of the first receiving groove 511. The first guide portion 52 is provided with a first guide slope 521 on one side thereof and the notch of the first receiving groove 511. The first guide slope 521 is inclined from the top to the bottom along the first direction; wherein the distance between the top of the first guide slope 521 and the first outer side wall 312 is smaller than the distance between the bottom of the first guide slope 521 and the first outer side wall 312. The first locking portion 53 is received in the first receiving groove 511. One side of the first locking portion 53 is slidably assembled on the first guide slope 521 and the other side is abutted against the first outer side wall 312. The side of the first locking portion 53 in contact with the first outer side wall 312 is adapted to the first outer side wall 312. The first locking portion 53 and the first sliding seat 51 jointly lock the first locking member 5 on the speed generating wheel 3. The first elastic member 54 is received in the first receiving groove 511 , one end of the first elastic member 54 is connected to the first locking portion 53 , and the other end is connected to the first sliding seat 51 . The first elastic member 54 is used to provide elastic force to drive the first locking portion 53 to move toward the top of the first guiding inclined surface 521 .

[0063] According to actual needs, the width of both sides of the first sliding seat 51 is smaller than the groove width of the first mounting groove 31, and both sides of the first sliding seat 51 are arc surfaces, and the arc surface on one side of the first sliding seat 51 abutting against the first inner wall 311 is concave, and the arc surface on the other side is convex; the first guide portion 52 can be integrally or separately arranged with the first sliding seat 51, and the first guide portion 52 can be a wedge block; the first locking portion 53 can be a cylinder; the first elastic member 54 can be a spring.

[0064] It should be noted that, when the first power wheel 2 is rotated clockwise, the first sliding seat 51 abuts against the first inner wall 311, the first locking portion 53 is located at the top end of the first guide portion 52, and the first locking portion 53 abuts against the first outer wall 312, so that the first locking member 5 is in a locked state fixed to the speed shifting wheel 3; when the first power wheel 2 is rotated counterclockwise, the first locking portion 53 is located at the bottom end of the first guide portion 52, and there is a gap between the first locking portion 53 and the first outer wall 312, so that the first locking member 5 can slide relative to the speed shifting wheel 3.

[0065] See also Figure 7 and Figure 8 , the first locking member 5 also includes a first connecting portion 55, a first protective sleeve 56 and a first friction block 57. The first connecting portion 55 is fixed to the end of the first sliding seat 51 away from the speed change generating wheel 3, and the first connecting portion 55 is slidably assembled in the first connecting groove 21; the first protective sleeve 56 is sleeved on the outer side of the first connecting portion 55, and the first protective sleeve 56 and the first connecting portion 55 are detachably connected. The first protective sleeve 56 can protect the first connecting portion 55, and it is convenient to replace the first protective sleeve 56 after it is worn, thereby reducing maintenance costs. The first friction block 57 is detachably arranged on the side of the first sliding seat 51 close to the speed change generating wheel 3, and the first friction block 57 contacts the bottom wall of the first mounting groove 31. The first friction block 57 is arranged to protect the first sliding seat 51, and it is convenient to replace the first friction block 57 after it is worn, thereby reducing maintenance costs. According to actual needs, the first protective sleeve 56 can be made of wear-resistant material, and the first protective sleeve 56 and the first connecting portion 55 can be plug-in connected, and the first friction block 57 and the first sliding seat 51 can be plug-in connected.

[0066] See also Figure 3 and Figure 4 The continuously variable transmission further comprises a first inner friction ring 9, a first outer friction ring 10 and a first stop ring 20. The first inner friction ring 9 is fixed on the first inner wall 311, and the first outer friction ring 10 is fixed on the first outer wall 312. The first inner friction ring 9 and the first outer friction ring 10 are provided to prevent the speed change generating wheel 3 from being worn. The first stop ring 20 is fixed on the speed change generating wheel 3 and is provided above the first installation groove 31. The first stop ring 20 is used to prevent the first locking member 5 from shaking up and down in the first installation groove 31.

[0067] See also Figure 3 , Figure 5 and Figure 6The continuously variable transmission also includes an eccentric seat 6, which is sleeved on the outer side of the base 1 and slidably assembled on the base 1 along the radial direction of the base 1. The speed generating wheel 3 is rotatably arranged on the outer side of the eccentric seat 6, and the speed generating wheel 3 is fixed to the eccentric seat 6 in the radial direction of the base 1, so that the speed generating wheel 3 can move along the radial direction of the base 1 following the eccentric seat 6. Among them, the eccentric seat 6 is provided with a first transmission structure, and the speed regulating wheel 4 is provided with a second transmission structure. The first transmission structure and the second transmission structure cooperate with each other, so that the speed regulating wheel 4 drives the eccentric seat 6 to slide relative to the base 1, so that the eccentric seat 6 drives the speed generating wheel 3 to move eccentrically relative to the first power wheel 2.

[0068] See also Figure 3 and Figure 5 The eccentric seat 6 is provided with a clearance hole 62, the length of which extends along the radial direction of the base 1, and a notch 11 is provided on the circumferential surface of the base 1. The base 1 is slidably assembled in the clearance hole 62, and the notch 11 is at least partially located in the clearance hole 62, so that sufficient space can be provided to allow the eccentric seat 6 to slide relative to the base 1 along the radial direction of the base 1.

[0069] See also Figure 3 , Figure 5 and Figure 6 In some embodiments, the first transmission structure includes a first transmission gear 41, which is fixed on the speed regulating wheel 4; the second transmission structure includes a transmission rack 61, which is fixed on the eccentric seat 6, and the length of the transmission rack 61 extends along the radial direction of the base 1, and the first transmission gear 41 is meshed with the transmission rack 61, so that the speed regulating wheel 4 can drive the eccentric seat 6 to slide relative to the base 1. In other embodiments, the first transmission structure and the second transmission structure can also be worm gear structures.

[0070] According to actual needs, the first transmission gear 41 and the transmission rack 61 can be a straight tooth transmission, the speed regulating wheel 4 is coaxially arranged with the base 1, and the speed regulating wheel 4 is also provided with a second transmission gear 42. The first transmission gear 41 and the second transmission gear 42 are respectively arranged at both ends of the speed regulating wheel 4, and the second transmission gear 42 is used to cooperate with other parts of the bicycle to drive the speed regulating wheel 4 to rotate.

[0071] See also Figures 1 to 4, the continuously variable transmission also includes a second power wheel 7 and a second locking member 8. The second power wheel 7 is rotatably arranged on the outside of the base 1 and is located on the side of the speed generating wheel 3 away from the first power wheel 2. The second power wheel 7 is coaxially arranged with the base 1; the second locking member 8 is slidably assembled on the speed generating wheel 3 along the circumferential direction of the base 1 and is slidably connected to the second power wheel 7 along the radial direction of the base 1. The second locking member 8 is fixed to the speed generating wheel 3 in the radial direction of the base 1, and is fixed to the second power wheel 7 in the circumferential direction of the base 1, so that when the speed generating wheel 3 rotates, the second power wheel 7 can be driven to rotate by the second locking member 8, and the speed generating wheel 3 can drive the second power wheel 7 to rotate. The second locking members 8 are moved to an eccentric setting relative to the second power wheel 7; there are multiple second locking members 8, and the multiple second locking members 8 are distributed in the circumferential direction of the speed shift generating wheel 3 and enclose a concentric circle coaxially set with the speed shift generating wheel 3; wherein the second locking members 8 have a locked state in which they can be fixed to the speed shift generating wheel 3 along a first direction, and an unlocked state in which they can slide relative to the speed shift generating wheel 3 along a second direction. When the speed shift generating wheel 3 is eccentric relative to the second power wheel 7 and each of the second locking members 8 slides along the first direction, only the second locking member 8 with the largest linear velocity is fixed to the speed shift generating wheel 3.

[0072] When the speed regulating wheel 4 is adjusted to drive the speed generating wheel 3 to move a certain distance in the radial direction of the base 1, the speed generating wheel 3 is eccentrically arranged relative to the second power wheel 7, and the concentric circles formed by the second locking members 8 and coaxially arranged with the speed generating wheel 3 are eccentrically arranged relative to the second power wheel 7. When the speed generating wheel 3 rotates in the first direction, each second locking member 8 can undergo continuous linear velocity changes and angular velocity changes on the speed generating wheel 3, and only the second locking member 8 with the largest linear velocity is fixed to the speed generating wheel 3, and the remaining second locking members 8 follow the speed generating wheel 3, and the second power wheel 7 rotates synchronously with the second locking member 8 with the largest linear velocity, so that the eccentric distance of the speed generating wheel 3 relative to the second power wheel 7 can be changed by adjusting the speed regulating wheel 4, and the maximum linear velocity of the second locking member 8 can be changed, so that the rotation speed of the second power wheel 7 changes, and the rotation speed adjustment of the second power wheel 7 is completed, and stepless speed change is realized.

[0073] It should be understood that a continuously variable transmission mechanism is formed between the first power wheel 2, the speed change generating wheel 3 and the first locking member 5, and another continuously variable transmission mechanism is formed between the second power wheel 7, the speed change generating wheel 3 and the second locking member 8, so that the continuously variable transmission in the present invention is a two-stage transmission. Among them, the first power wheel 2 can be used as a speed input wheel, and the second power wheel 7 can be used as a speed output wheel.

[0074] It should be understood that the second power wheel 7, the second locking member 8 and the speed generating wheel 3 constitute an overrunning clutch; wherein, taking the speed generating wheel 3 as the speed input wheel for example, when the speed generating wheel 3 rotates clockwise, the second locking member 8 and the speed generating wheel 3 are fixed to each other, and all the second locking members 8 rotate clockwise with the speed generating wheel 3, and all the second locking members 8 drive the second power wheel 7 to rotate clockwise; when the speed generating wheel 3 rotates counterclockwise, all the second locking members 8 can slide relative to the speed generating wheel 3, and the second power wheel 7 remains stationary.

[0075] See also Figure 3 and Figure 4 , a second annular mounting groove 32 is provided on one side of the speed change generating wheel 3 close to the second power wheel 7, the second mounting groove 32 is coaxially arranged with the speed change generating wheel 3, and a plurality of second locking members 8 are slidably assembled in the second mounting groove 32; wherein, the second locking member 8 is arranged in the second mounting groove 32 to ensure that the second locking member 8 slides along the circumferential direction of the base 1, and the second locking member 8 is fixed to the speed change generating wheel 3 in the radial direction of the base 1. A second connecting groove 71 is provided on both sides of the second power wheel 7 close to the speed change generating wheel 3, the length of which extends along the radial direction of the base 1, and a plurality of second connecting grooves 71 are provided, and the plurality of second connecting grooves 71 are spaced apart around the central axis of the second power wheel 7, and the plurality of second locking members 8 are slidably connected to the plurality of second connecting grooves 71 in a one-to-one correspondence; wherein, the second locking member 8 is arranged in the second connecting groove 71 to ensure that the second locking member 8 slides along the radial direction of the base 1, and the second locking member 8 is fixed to the second power wheel 7 in the circumferential direction of the base 1.

[0076] See also Figure 3 and Figure 4 In a specific example, eight second locking members 8 may be provided, and eight second connecting grooves 71 evenly spaced are provided on the second power wheel 7. The eight second locking members 8 are distributed in the second installation groove 32, and the eight second locking members 8 are slidably assembled in the eight second connecting grooves 71 in a one-to-one correspondence. The angles between any two adjacent second locking members 8 are different, and there are countless angles between any two adjacent second locking members 8. When the speed generating wheel 3 and the second power wheel 7 are eccentrically arranged, the speed generating wheel 3 is rotated clockwise, and only the second locking member 8 with the largest linear velocity is fixed to the speed generating wheel 3, and the remaining seven second locking members 8 follow in the second installation groove 32. By continuously rotating the speed generating wheel 3, the linear velocity of each second locking member 8 changes continuously, and the second locking member 8 at the maximum linear velocity will automatically lock the speed generating wheel 3 to relay and drive the second power wheel 7 to rotate, thereby completing the speed change.

[0077] See also Figure 4 , Fig. 9 and Fig.10The second locking member 8 includes a second sliding seat 81, a second guide portion 82, a second locking portion 83 and a second elastic portion. The second sliding seat 81 is slidably assembled in the second mounting groove 32. The second sliding seat 81 is provided with a second accommodating groove 811. The second mounting groove 32 is provided with a second inner side wall 321 and a second outer side wall 322 that are relatively distributed. The notch of the second accommodating groove 811 is arranged opposite to the second outer side wall 322. Both sides of the second sliding seat 81 are adapted to the second inner side wall 321 and the second outer side wall 322, which is conducive to the second sliding seat 81 sliding in the second mounting groove 32, and the second sliding seat 81 abuts against the second inner side wall 321. The second guide portion 82 is fixed to the bottom wall of the second sliding seat 81 and the notch of the second receiving groove 811. A second guide slope 821 is provided on one side of the second guide portion 82 and the notch of the second receiving groove 811. The second guide slope 821 is inclined from the top to the bottom along the second direction; wherein the distance between the top of the second guide slope 821 and the second outer side wall 322 is smaller than the distance between the bottom of the second guide slope 821 and the second outer side wall 322. The second locking portion 83 is accommodated in the second receiving groove 811. One side of the second locking portion 83 is slidably assembled on the second guide slope 821 and the other side is abutted against the second outer side wall 322. The side of the second locking portion 83 that contacts the second outer side wall 322 is adapted to the second outer side wall 322. The second locking portion 83 and the second sliding seat 81 jointly lock the second locking member 8 on the speed generating wheel 3. The second elastic member 84 is received in the second receiving groove 811 , one end of the second elastic member 84 is connected to the second locking portion 83 , and the other end is connected to the second sliding seat 81 . The second elastic member 84 is used to provide elastic force to drive the second locking portion 83 to move toward the top of the second guiding inclined surface 821 .

[0078] According to actual needs, the width of both sides of the second sliding seat 81 is smaller than the groove width of the second mounting groove 32, and both sides of the second sliding seat 81 are arc surfaces, and the two arc surfaces on the second sliding seat 81 that abut against the second inner wall 321 are concave, and the arc surface on the other side is convex; the second guide portion 82 can be integrally or separately arranged with the second sliding seat 81, and the second guide portion 82 can be a wedge block; the second locking portion 83 can be a cylinder; the second elastic member 84 can be a spring.

[0079] It should be noted that, when the speed shift generating wheel 3 is rotated clockwise, the second sliding seat 81 abuts against the second inner wall 321, the second locking portion 83 is located at the top end of the second guide portion 82, and the second locking portion 83 abuts against the second outer wall 322, so that the second locking member 8 is in a locked state fixed to the speed shift generating wheel 3; when the speed shift generating wheel 3 is rotated counterclockwise, the second locking portion 83 is located at the bottom end of the second guide portion 82, and there is a gap between the second locking portion 83 and the second outer wall 322, so that the second locking member 8 can slide relative to the speed shift generating wheel 3.

[0080] See also Fig. 9 and Fig.10 The second locking member 8 also includes a second connecting portion 85, a second protective sleeve 86 and a second friction block 87. The second connecting portion 85, the second protective sleeve 86 and the second friction block 87 in the second locking member 8 are arranged in the same manner as the first connecting portion 55, the first protective sleeve 56 and the first friction block 57 in the first locking member 5, and are not described repeatedly here.

[0081] It should be noted that the first locking member 5 and the second locking member 8 in the embodiment of the present invention do not need to be triggered by an external trigger structure so that they can be fixed to the speed change generating wheel 3 or can slide relative to the speed change generating wheel 3, so that the first locking member 5 and the second locking member 8 can be subtracted from the components that cooperate with the trigger structure, which greatly simplifies the structure of the first locking member 5 and the second locking member 8.

[0082] See also Figure 3 and Figure 4 The continuously variable transmission further comprises a second inner friction ring 30, a second outer friction ring 40 and a second stop ring 50. The second inner friction ring 30 is fixed on the second inner wall 321, and the second outer friction ring 40 is fixed on the second outer wall 322. The second inner friction ring 30 and the second outer friction ring 40 can prevent the speed change generating wheel 3 from being worn. The second stop ring 50 is fixed on the speed change generating wheel 3 and is arranged above the second installation groove 32. The second stop ring 50 is used to prevent the second locking member 8 from shaking up and down in the second installation groove 32.

[0083] See also Figure 1 , Figure 3 and Figure 5 The continuously variable transmission also includes a first bearing 60, a second bearing 70, a third bearing 80 and a fourth bearing 90. The speed regulating wheel 4 is rotatably arranged in the base 1 through the first bearing 60, the first power wheel 2 is rotatably arranged outside the base 1 through the second bearing 70, the speed generating wheel 3 is rotatably arranged outside the eccentric seat 6 through the third bearing 80, and the second power wheel 7 is rotatably arranged outside the base 1 through the fourth bearing 90. A support plate 12 is also arranged on the base 1, and the eccentric seat 6 is slidably assembled on the support plate 12.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuously variable transmission, characterized in that: include: Pedestal; A first power wheel, rotatably disposed on the outer side of the base, wherein the first power wheel is coaxially disposed with the base; A speed-changing generating wheel is rotatably arranged outside the base and located on one side of the first power wheel. The speed-changing generating wheel is slidably assembled on the base along the radial direction of the base. The rotating shaft between the speed-changing generating wheel and the base is parallel to or coaxial with the central axis of the base. a speed regulating wheel, rotatably disposed on the base, the speed regulating wheel being connected to the speed-changing generating wheel, and the speed regulating wheel being used to drive the speed-changing generating wheel to slide, so that the speed-changing generating wheel is eccentrically disposed relative to the first power wheel; and A first locking member is slidably assembled on the speed-changing generating wheel along the circumferential direction of the base and is slidably connected to the first power wheel along the radial direction of the base. The first locking member is fixed to the speed-changing generating wheel in the radial direction of the base and to the first power wheel in the circumferential direction of the base. A plurality of the first locking members are provided. The plurality of the first locking members are distributed in the circumferential direction of the speed-changing generating wheel and enclose a concentric circle coaxially arranged with the speed-changing generating wheel. Among them, the first locking member has a locked state in which it can be fixed to the speed generating wheel along a first direction, and an unlocked state in which it can slide relative to the speed generating wheel along a second direction. The first direction is opposite to the second direction. When the speed generating wheel is eccentric relative to the first power wheel and each of the first locking members slides along the first direction, only the first locking member with the largest linear velocity is fixed to the speed generating wheel.

2. The continuously variable transmission according to claim 1, characterized in that: A first annular mounting groove is provided on one side of the speed change generating wheel close to the first power wheel, the first mounting groove is coaxially arranged with the speed change generating wheel, and a plurality of the first locking members are slidably assembled in the first mounting groove; A first connecting groove is provided on one side of the first power wheel close to the speed generating wheel, and the length of the first connecting groove extends along the radial direction of the base. A plurality of first connecting grooves are provided, and the plurality of first connecting grooves are spaced apart around the central axis of the first power wheel, and a plurality of first locking members are slidably connected to the plurality of first connecting grooves in a one-to-one manner.

3. The continuously variable transmission according to claim 2, characterized in that: The first locking member comprises: A first sliding seat, slidably assembled in the first mounting groove, the first sliding seat is provided with a first accommodating groove, the first mounting groove is provided with a first inner side wall and a first outer side wall which are relatively distributed, the notch of the first accommodating groove is arranged opposite to the first outer side wall, the two sides of the first sliding seat are adapted to the first inner side wall and the first outer side wall, and the first sliding seat abuts against the first inner side wall; A first guide portion is fixed to a bottom wall of the first sliding seat that is arranged opposite to the notch of the first receiving groove, and a first guide slope is provided on one side of the first guide portion that is arranged opposite to the notch of the first receiving groove, and the first guide slope is inclined from the top end to the bottom end along the first direction; A first locking portion is received in the first receiving groove, one side of the first locking portion is slidably mounted on the first guide inclined surface, and the other side of the first locking portion abuts against the first outer side wall, and the side of the first locking portion that contacts the first outer side wall is adapted to the first outer side wall; and The first elastic member is accommodated in the first accommodating groove, one end of the first elastic member is connected to the first locking portion, and the other end is connected to the first sliding seat, and the first elastic member is used to provide elastic force to drive the first locking portion to move toward the top of the first guide slope.

4. The continuously variable transmission according to claim 1, characterized in that: The continuously variable transmission also includes an eccentric seat, which is sleeved on the outer side of the base and slidably assembled on the base along the radial direction of the base, and the speed change generating wheel is rotatably arranged on the outer side of the eccentric seat, and the speed change generating wheel is fixed to the eccentric seat in the radial direction of the base; The eccentric seat is provided with a first transmission structure, and the speed regulating wheel is provided with a second transmission structure. The first transmission structure and the second transmission structure cooperate with each other so that the speed regulating wheel drives the eccentric seat to slide relative to the base.

5. The continuously variable transmission according to claim 4, characterized in that: The first transmission structure comprises a first transmission gear, and the first transmission gear is fixed on the speed regulating wheel; The second transmission structure comprises a transmission rack, the transmission rack is fixed on the eccentric seat, and the length of the transmission rack extends along the radial direction of the base, and the first transmission gear is meshed with the transmission rack.

6. The continuously variable transmission according to claim 4, characterized in that: The eccentric seat is provided with a clearance through hole, and the length of the clearance through hole extends along the radial direction of the base; A notch is provided on the peripheral surface of the base, the base is slidably assembled in the clearance through hole, and the notch is at least partially located in the clearance through hole.

7. The continuously variable transmission according to claim 1, characterized in that: The continuously variable transmission further comprises: a second power wheel, rotatably disposed outside the base and located on a side of the speed-changing generating wheel away from the first power wheel, the second power wheel being coaxially disposed with the base; and A second locking member is slidably assembled on the speed-changing generating wheel along the circumferential direction of the base and is slidably connected to the second power wheel along the radial direction of the base. The second locking member is fixed to the speed-changing generating wheel in the radial direction of the base and to the second power wheel in the circumferential direction of the base. A plurality of second locking members are provided. The plurality of second locking members are distributed in the circumferential direction of the speed-changing generating wheel and enclose a concentric circle coaxially arranged with the speed-changing generating wheel. Among them, the second locking member has a locked state in which it can be fixed to the speed shift generating wheel along the first direction, and an unlocked state in which it can slide relative to the speed shift generating wheel along the second direction. When the speed shift generating wheel is eccentric relative to the second power wheel and each of the second locking members slides along the first direction, only the second locking member with the largest linear velocity is fixed to the speed shift generating wheel.

8. The continuously variable transmission according to claim 7, characterized in that: A second annular mounting groove is provided on one side of the speed change generating wheel close to the second power wheel, the second mounting groove is coaxially arranged with the speed change generating wheel, and a plurality of the second locking members are slidably assembled in the second mounting groove; The second power wheel is provided with second connecting grooves on both sides close to the speed generating wheel, and the length of the second connecting grooves extends along the radial direction of the base. There are multiple second connecting grooves, and the multiple second connecting grooves are spaced apart around the central axis of the second power wheel, and the multiple second locking members are slidably connected to the multiple second connecting grooves one by one.

9. The continuously variable transmission according to claim 8, characterized in that: The second locking member comprises: A second sliding seat is slidably assembled in the second mounting groove, the second sliding seat is provided with a second accommodating groove, the second mounting groove is provided with a second inner side wall and a second outer side wall which are relatively distributed, the notch of the second accommodating groove is arranged opposite to the second outer side wall, the two sides of the second sliding seat are adapted to the second inner side wall and the second outer side wall, and the second sliding seat abuts against the second inner side wall; A second guide portion is fixed to a bottom wall of the second sliding seat that is arranged opposite to the notch of the second receiving groove, and a second guide slope is provided on one side of the second guide portion that is arranged opposite to the notch of the second receiving groove, and the second guide slope is inclined from the top end to the bottom end along the second direction; A second locking portion is received in the second receiving groove, one side of the second locking portion is slidably mounted on the second guide inclined surface, and the other side of the second locking portion abuts against the second outer side wall, and the side of the second locking portion that contacts the second outer side wall is adapted to the second outer side wall; and The second elastic member is accommodated in the second accommodating groove, one end of the second elastic member is connected to the second locking portion, and the other end is connected to the second sliding seat, and the second elastic member is used to provide elastic force to drive the second locking portion to move toward the top of the second guide slope.

10. A bicycle, characterized in that: Comprising a continuously variable transmission as claimed in any one of claims 1-9.

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