Continuously variable transmission and bicycle

Abstract

The utility model 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 utility model relates to the technical field of bicycles, in particular to a continuously variable transmission and a bicycle. Background Art

[0002] In the related art, stepped transmissions are adopted on bicycles or power-assisted bicycles, which are divided into two types: internal transmissions and external transmissions. Both of these two types of transmissions have only a limited number of fixed gears. There are often situations where the pedaling force is too large when shifting up one gear and too small when shifting down one gear, which cannot meet the personalized adjustment requirements of people for pedaling force during riding. In addition, the internal transmission is heavy, and the external transmission is prone to chain dropping during gear shifting, resulting in certain defects in the transmissions on bicycles or power-assisted bicycles. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a continuously variable transmission and a bicycle, aiming to solve the problem that the stepped transmission adopted by the bicycle in the related art cannot meet the personalized adjustment requirements for pedaling force.

[0004] To solve the above technical problem, the first aspect of the utility model provides a continuously variable transmission, including:

[0005] A base;

[0006] A first driving wheel, rotatably arranged on the outer side of the base, and the first driving wheel is coaxially arranged with the base;

[0007] A variable-speed generating wheel, rotatably arranged on the outer side of the base and located on one side of the first driving wheel, the variable-speed generating wheel is slidably assembled on the base along the radial direction of the base, and the rotating shaft between the variable-speed generating wheel and the base is parallel or coaxial with the central axis of the base;

[0008] A speed-regulating wheel, rotatably arranged on the base, the speed-regulating wheel is connected to the variable-speed generating wheel, and the speed-regulating wheel is used to drive the variable-speed generating wheel to slide, so that the variable-speed generating wheel is eccentrically arranged relative to the first driving wheel; and,

[0009] A first locking member, slidably assembled on the variable-speed generating wheel along the circumferential direction of the base and slidably connected to the first driving wheel along the radial direction of the base, the first locking member is fixed to the variable-speed generating wheel in the radial direction of the base and fixed to the first driving wheel in the circumferential direction of the base. There are multiple first locking members, and the multiple first locking members are distributed in the circumferential direction of the variable-speed generating wheel and enclose a concentric circle coaxially arranged with the variable-speed generating wheel;

[0010] Wherein, the first locking member has a locked state in which it can be fixed to the speed-changing driving wheel along a first direction, and an unlocked state in which it can slide relative to the speed-changing driving wheel along a second direction. The first direction is opposite to the second direction. When the speed-changing driving wheel is eccentric with respect to the first driving wheel and each of the first locking members slides along the first direction, only the first locking member with the maximum linear velocity is fixed to the speed-changing driving wheel.

[0011] Optionally, a ring-shaped first mounting groove is provided on one side of the speed-changing driving wheel close to the first driving wheel. The first mounting groove is coaxially arranged with the speed-changing driving wheel, and a plurality of the first locking members are slidably assembled in the first mounting groove;

[0012] On one side of the first driving wheel close to the speed-changing driving wheel, a first connecting groove with a length extending along the radial direction of the base is provided. There are a plurality of the first connecting grooves, and the plurality of first connecting grooves are distributed at intervals around the central axis of the first driving wheel, and a plurality of the first locking members are slidably connected to the plurality of first connecting grooves in a one-to-one correspondence.

[0013] Optionally, the first locking member includes:

[0014] A first sliding seat, which is 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 oppositely distributed. The notch of the first accommodating groove is oppositely arranged with 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 guiding portion, which is fixed to the bottom wall of the first sliding seat opposite to the notch of the first accommodating groove. A first guiding inclined surface is provided on one side of the first guiding portion opposite to the notch of the first accommodating groove. The first guiding inclined surface inclines along the first direction from the top end to the bottom end;

[0016] A first locking portion, which is received in the first accommodating groove. One side of the first locking portion is slidably assembled on the first guiding inclined surface, and the other side abuts against the first outer side wall. The side of the first locking portion in contact with the first outer side wall is adapted to the first outer side wall; and,

[0017] A first elastic member, which is received 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. The first elastic member is used to provide an elastic force for driving the first locking portion to move towards the top end of the first guiding inclined surface.

[0018] Optionally, the continuously variable transmission further includes an eccentric seat, which is sleeved outside the base and is slidably assembled on the base along the radial direction of the base. The variable-speed driving wheel is rotatably arranged outside the eccentric seat, and the variable-speed driving wheel is fixed to the eccentric seat in the radial direction of the base;

[0019] Wherein, the eccentric seat is provided with a first transmission structure, the speed regulating wheel is provided with a second transmission structure, and the first transmission structure cooperates with the second transmission structure to enable the speed regulating wheel to drive 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 includes 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. The first transmission gear meshes with the transmission rack.

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

[0023] A notch is provided on the circumferential surface of the base. The base is slidably assembled in the relief through hole, and at least part of the notch is located in the relief through hole.

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

[0025] A second driving wheel, which is rotatably arranged outside the base and on the side of the variable-speed driving wheel away from the first driving wheel, and the second driving wheel is coaxially arranged with the base; and,

[0026] A second locking member, which is slidably assembled on the variable-speed driving wheel along the circumferential direction of the base and is slidably connected to the second driving wheel along the radial direction of the base. The second locking member is fixed to the variable-speed driving wheel in the radial direction of the base and is fixed to the second driving wheel in the circumferential direction of the base. There are a plurality of second locking members, and the plurality of second locking members are distributed in the circumferential direction of the variable-speed driving wheel and enclose a concentric circle coaxially arranged with the variable-speed driving wheel;

[0027] Wherein, the second locking member has a locking state in which it can be fixed to the variable-speed driving wheel along the first direction and an unlocking state in which it can slide relative to the variable-speed driving wheel along the second direction. When the variable-speed driving wheel is eccentric relative to the second driving wheel and each second locking member slides along the first direction, only the second locking member with the maximum linear velocity is fixed to the variable-speed driving wheel.

[0028] Optionally, a ring-shaped second mounting groove is provided on one side of the variable-speed generating wheel close to the second power wheel. The second mounting groove is coaxially arranged with the variable-speed generating wheel, and a plurality of the second locking members are slidably assembled in the second mounting groove;

[0029] On the two sides of the second power wheel close to the variable-speed generating wheel, second connecting grooves extending along the radial direction of the base are provided. There are a plurality of the second connecting grooves, and the plurality of second connecting grooves are spaced apart around the central axis of the second power wheel, and the plurality of second locking members are slidably connected to the plurality of second connecting grooves in a one-to-one correspondence.

[0030] Optionally, the second locking member includes:

[0031] A second sliding seat 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 oppositely distributed second inner side walls and second outer side walls. 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 guiding portion fixed to the bottom wall of the second sliding seat opposite to the notch of the second accommodating groove. A second guiding inclined surface is provided on one side of the second guiding portion opposite to the notch of the second accommodating groove. The second guiding inclined surface is inclined in the second direction from the top end to the bottom end;

[0033] A second locking portion accommodated in the second accommodating groove. One side of the second locking portion is slidably assembled on the second guiding inclined surface, and the other side abuts against the second outer side wall. The side of the second locking portion in contact with the second outer side wall is adapted to the second outer side wall; and,

[0034] A second elastic member 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. The second elastic member is used to provide an elastic force for driving the second locking portion to move towards the top end of the second guiding inclined surface.

[0035] In a second aspect of the present invention, a bicycle is provided, including the continuously variable transmission according to any one of the above.

[0036] Compared with related technologies, the beneficial effects of a continuously variable transmission and a bicycle in the present utility model are as follows: It can change the eccentric distance between the variable speed generating wheel and the first driving wheel by adjusting the speed regulating wheel when the speed of the first driving wheel is constant, so as to change the rotational speed of the variable speed generating wheel and achieve stepless speed change, meeting the personalized adjustment requirements for pedaling force during cycling. In addition, this continuously variable transmission can achieve non-frictional continuous stepless speed change, with large transmitted torque and high transmission efficiency; it can be shifted in a stationary state, a rotating state, and a cycling state, with convenient speed regulation, light weight, and small volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 It is a schematic structural diagram of the variable speed generating wheel in the continuously variable transmission provided by the embodiment of the present utility model when it is not offset;

[0039] Figure 2 It is a schematic structural diagram of the variable speed generating wheel in the continuously variable transmission provided by the embodiment of the present utility model when it is offset;

[0040] Figure 3 It is an exploded view of the continuously variable transmission provided by the embodiment of the present utility model;

[0041] Figure 4 is Figure 3 an exploded view of Detail A;

[0042] Figure 5 It is a schematic distribution diagram of the first locking members when the variable speed generating wheel is offset in the continuously variable transmission provided by the embodiment of the present utility model;

[0043] Figure 6 It is a schematic distribution diagram of the first locking members when the variable speed generating wheel is not offset in the continuously variable transmission provided by the embodiment of the present utility model;

[0044] Figure 7 It is a schematic structural diagram of the first locking member provided by the embodiment of the present utility model;

[0045] Figure 8 It is a cross-sectional view of the first locking member provided by the embodiment of the present utility model;

[0046] Figure 9 It is a schematic structural diagram of the second locking member provided by the embodiment of the present utility model;

[0047] Figure 10It is a cross-sectional view of the second locking member provided by the embodiment of the present utility model.

[0048] In the drawings, each reference numeral represents: 1, base; 11, notch; 12, support plate; 2, first driving wheel; 21, first connection groove; 3, speed change generating wheel; 31, first installation groove; 311, first inner side wall; 312, first outer side wall; 32, second installation groove; 321, second inner side wall; 322, second outer side 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 guiding portion; 521, first guiding inclined surface; 53, first locking portion; 54, first elastic member; 55, first connection portion; 56, first protective sleeve; 57, first friction block; 6, eccentric seat; 61, transmission rack; 62, relief through hole; 7, second driving wheel; 71, second connection groove; 8, second locking member; 81, second sliding seat; 811, second accommodating groove; 82, second guiding portion; 821, second guiding inclined surface; 83, second locking portion; 84, second elastic member; 85, second connection portion; 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 implementation manners

[0049] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0050] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0052] Embodiment:

[0053] An embodiment of the present utility model provides a bicycle, which includes a vehicle body and a continuously variable transmission. The continuously variable transmission is disposed on the vehicle body. By adjusting the continuously variable transmission, the required speed ratio within the speed change range can be quickly adjusted when the bicycle is in a stopped state, a riding state, and a coasting state.

[0054] Please refer to Figures 1 to 10 , the continuously variable transmission includes a base 1, a first driving wheel 2, a speed change generating wheel 3, a speed regulating wheel 4, and a first locking member 5. The first driving wheel 2 is rotatably disposed outside the base 1, and the first driving wheel 2 is coaxially disposed with the base 1, that is, the first driving wheel 2 is sleeved outside the base 1 and can rotate around the central axis of the base 1. The speed change generating wheel 3 is rotatably disposed outside the base 1 and is located on one side of the first driving wheel 2. The speed change generating wheel 3 is slidably assembled to the base 1 in the radial direction of the base 1. The rotating shaft between the speed change generating wheel 3 and the base 1 is parallel or coaxial with the central axis of the base 1, that is, the speed change generating wheel 3 is sleeved outside the base 1, and the speed change generating wheel 3 can not only rotate around the central axis of the base 1, but also slide relative to the base 1 in the radial direction of the base 1. The speed regulating wheel 4 is rotatably disposed on the base 1. The speed regulating wheel 4 is connected to the speed change generating wheel 3. The speed regulating wheel 4 is used to drive the speed change generating wheel 3 to slide, so that the speed change generating wheel 3 is eccentrically disposed relative to the first driving wheel 2. The first locking member 5 is slidably assembled to the speed change generating wheel 3 in the circumferential direction of the base 1 and is slidably connected to the first driving wheel 2 in the radial direction of the base 1. The first locking member 5 is fixed to the speed change generating wheel 3 in the radial direction of the base 1 and is fixed to the first driving wheel 2 in the circumferential direction of the base 1, so that when the first driving wheel 2 rotates, the speed change generating wheel 3 can be driven to rotate through the first locking member 5, and the speed change generating wheel 3 can drive the first locking member 5 to move to be eccentrically disposed relative to the first driving wheel 2; there are a plurality of first locking members 5, and the plurality of first locking members 5 are distributed in the circumferential direction of the speed change generating wheel 3 and enclose a concentric circle coaxially disposed with the speed change generating wheel 3; wherein, the first locking member 5 has a locking state in which it can be fixed to the speed change generating wheel 3 along a first direction, and an unlocking state in which it can slide relative to the speed change generating wheel 3 along a second direction. The first direction and the second direction are opposite. When the speed change generating wheel 3 is eccentric relative to the first driving wheel 2 and each first locking member 5 slides along the first direction, only the first locking member 5 with the maximum speed is fixed to the speed change generating wheel 3.

[0055] When adjusting the speed regulating wheel 4 to drive the variable speed generating wheel 3 to move a certain distance along the radial direction of the base 1, the variable speed generating wheel 3 is eccentrically arranged relative to the first driving wheel 2, and the concentric circle formed by enclosing the first locking members 5 and coaxial with the variable speed generating wheel 3 is eccentrically arranged relative to the first driving wheel 2. At this time, driving the first driving wheel 2 to rotate in the first direction, the first locking members 5 follow the first driving wheel 2 to rotate in the first direction and drive the variable speed generating wheel 3 to rotate in the first direction, and the first locking members 5 can have continuous linear speed changes and angular speed changes on the variable speed generating wheel 3. Only the first locking member 5 with the maximum linear speed is fixed to the variable speed generating wheel 3, and the remaining first locking members 5 follow on the variable speed generating wheel 3. The variable speed generating wheel 3 rotates synchronously with the first locking member 5 with the maximum linear speed. Thus, the eccentric distance between the variable speed generating wheel 3 and the first driving wheel 2 can be changed by adjusting the speed regulating wheel 4, and the maximum linear speed of the first locking member 5 can be changed, so that the rotational speed of the variable speed generating wheel 3 changes, completing the adjustment of the rotational speed of the variable speed generating wheel 3. Therefore, when the speed of the first driving wheel 2 is constant, the eccentric distance between the variable speed generating wheel 3 and the first driving wheel 2 can be changed by adjusting the speed regulating wheel 4 to change the rotational speed of the variable speed generating wheel 3, realizing stepless speed change and meeting the personalized adjustment requirements for the pedaling force during riding. In addition, this stepless speed changer can achieve non-frictional continuous stepless speed change, with large transmitted torque and high transmission efficiency; it can be shifted in a stationary state, a rotating state, and a riding state, is convenient for speed regulation, and is light in weight and small in size.

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

[0057] It should be understood that the first driving wheel 2, the first locking members 5, and the variable speed generating wheel 3 form an overrunning clutch; among them, taking the first driving wheel 2 as the speed input wheel as an example, when the first driving wheel 2 rotates clockwise, all the first locking members 5 follow the first driving wheel 2 to rotate clockwise, and all the first locking members 5 are fixed to the variable speed generating wheel 3. At this time, the variable speed generating wheel 3 rotates clockwise; when the first driving wheel 2 rotates counterclockwise, all the first locking members 5 follow the first driving wheel 2 to rotate counterclockwise, and all the first locking members 5 can slide relative to the variable speed generating wheel 3. At this time, the variable speed generating wheel 3 remains stationary.

[0058] Please refer to Figures 3 to 6, on one side of the variable-speed driving wheel 3 close to the first driving wheel 2, there is an annular first installation groove 31, the first installation groove 31 is coaxially arranged with the variable-speed driving wheel 3, and a plurality of first locking members 5 are slidably assembled in the first installation groove 31; wherein, arranging the first locking members 5 in the first installation groove 31 can not only ensure that the first locking members 5 slide along the circumferential direction of the base 1, but also ensure that the first locking members 5 are fixed to the variable-speed driving wheel 3 in the radial direction of the base 1. On one side of the first driving wheel 2 close to the variable-speed driving wheel 3, there are a plurality of first connecting grooves 21 extending along the radial direction of the base 1, the plurality of first connecting grooves 21 are distributed at intervals around the central axis of the first driving 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, arranging the first locking members 5 in the first connecting grooves 21 can not only ensure that the first locking members 5 slide along the radial direction of the base 1, but also ensure that the first locking members 5 are fixed to the first driving wheel 2 in the circumferential direction of the base 1.

[0059] Please refer to Figure 4 and Figure 5 , in a specific example, eight first locking members 5 can be provided, there are eight first connecting grooves 21 evenly distributed on the first driving 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 included angles between any two adjacent first locking members 5 are different, and there are countless included angle angles between two adjacent first locking members 5. When the variable-speed driving wheel 3 and the first driving wheel 2 are eccentrically arranged, rotate the first driving wheel 2 clockwise, the first driving wheel 2 drives the first locking members 5 to rotate, the eight first locking members 5 have continuous linear velocity changes and angular velocity changes in the first installation groove 31, and only the first locking member 5 with the maximum linear velocity is fixed to the variable-speed driving wheel 3, and the remaining seven first locking members 5 follow in the first installation groove 31. Continuously rotate the first driving wheel 2, the linear velocities of the respective first locking members 5 continuously change, and the first locking member 5 with the maximum linear velocity will automatically lock the variable-speed driving wheel 3 to drive the variable-speed driving wheel 3 to rotate by relay, thereby completing the speed change.

[0060] The principle of stepless speed change is described below:

[0061] Please refer to Figure 5 and Figure 6 , the minimum included angle between two adjacent first locking members 5 is N, the maximum included angle is M (M is greater than N), the numerical result of M divided by N is the maximum speed change range, and the eccentric distance between the variable-speed driving wheel 3 and the first driving wheel 2 determines the maximum speed ratio. During the process of two adjacent first locking members 5 sliding counterclockwise from the minimum included angle N to the maximum included angle M, the included angle between two adjacent first locking members 5 will continuously increase from N to M, thereby forming countless included angle angles, thereby forming stepless speed change.

[0062] Please refer to Figure 4 、 Figure 7 and Figure 8 As shown in, the first locking member 5 includes a first sliding seat 51, a first locking portion 53, a first elastic member 54 and a first guiding portion 52. The first sliding seat 51 is slidably assembled in the first installation groove 31. The first sliding seat 51 is provided with a first accommodating groove 511. The first installation groove 31 is provided with a first inner side wall 311 and a first outer side wall 312 which are distributed oppositely. The notch of the first accommodating groove 511 is arranged opposite to the first outer side wall 312. The two 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 sliding of the first sliding seat 51 in the first installation groove 31, and the first sliding seat 51 abuts against the first inner side wall 311. The first guiding portion 52 is fixed to the bottom wall of the first sliding seat 51 opposite to the notch of the first accommodating groove 511. One side of the first guiding portion 52 opposite to the notch of the first accommodating groove 511 is provided with a first guiding inclined surface 521. The first guiding inclined surface 521 inclines in the first direction from the top end to the bottom end; wherein, the distance between the top end of the first guiding inclined surface 521 and the first outer side wall 312 is less than the distance between the bottom end of the first guiding inclined surface 521 and the first outer side wall 312. The first locking portion 53 is received in the first accommodating groove 511. One side of the first locking portion 53 is slidably assembled on the first guiding inclined surface 521, and the other side abuts 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 change generating wheel 3. The first elastic member 54 is received in the first accommodating 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 an elastic force for driving the first locking portion 53 to move towards the top end of the first guiding inclined surface 521.

[0063] According to actual needs, the widths of the two sides of the first sliding seat 51 are less than the groove width of the first installation groove 31. The two sides of the first sliding seat 51 are both arc surfaces. The arc surface of the side of the first sliding seat 51 abutting against the first inner side wall 311 is concave, and the arc surface of the other side is convex; the first guiding portion 52 can be integrally provided or separately provided with the first sliding seat 51. The first guiding portion 52 can be a wedge-shaped 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 driving 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 of the first guiding 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 of being fixed to the variable speed generating wheel 3; when the first driving wheel 2 is rotated counterclockwise, the first locking portion 53 is located at the bottom end of the first guiding 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 variable speed generating wheel 3.

[0065] Please refer to Figure 7 and Figure 8 As shown in FIGS. and, the first locking member 5 further 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 one end of the first sliding seat 51 away from the variable speed 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 outside 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 at the same time, it is convenient to replace the first protective sleeve 56 after wear, reducing the maintenance cost. The first friction block 57 is detachably arranged on one side of the first sliding seat 51 close to the variable speed generating wheel 3, and the first friction block 57 is in contact with the bottom wall of the first mounting groove 31. The arrangement of the first friction block 57 can protect the first sliding seat 51, and at the same time, it is convenient to replace the first friction block 57 after wear, reducing the maintenance cost. According to actual needs, the first protective sleeve 56 can be made of wear-resistant material, the first protective sleeve 56 and the first connecting portion 55 can be in an insertion connection, and the first friction block 57 and the first sliding seat 51 can be in an insertion connection.

[0066] Please refer to Figure 3 and Figure 4 As shown in FIGS.,, and, the continuously variable transmission further includes a first inner friction ring 9, a first outer friction ring 10 and a first limiting 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 arrangement of the first inner friction ring 9 and the first outer friction ring 10 can prevent the variable speed generating wheel 3 from being worn. The first limiting ring 20 is fixed on the variable speed generating wheel 3 and is arranged above the first mounting groove 31. The first limiting ring 20 is used to prevent the first locking member 5 from shaking up and down in the first mounting groove 31.

[0067] Please refer to Figure 3 、 Figure 5 and Figure 6, the continuously variable transmission further includes an eccentric seat 6. The eccentric seat 6 is sleeved outside the base 1 and is slidably assembled on the base 1 in the radial direction of the base 1. The variable speed generating wheel 3 is rotatably arranged outside the eccentric seat 6, and the variable speed generating wheel 3 is fixed to the eccentric seat 6 in the radial direction of the base 1, so that the variable 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 to enable the speed regulating wheel 4 to drive the eccentric seat 6 to slide relative to the base 1, so that the eccentric seat 6 drives the variable speed generating wheel 3 to move to be eccentric relative to the first power wheel 2.

[0068] Please refer to Figure 3 and Figure 5 , a relief through hole 62 is provided on the eccentric seat 6. The length of the relief through hole 62 extends along the radial direction of the base 1. A notch 11 is provided on the circumferential surface of the base 1. The base 1 is slidably assembled in the relief through hole 62, and at least part of the notch 11 is located in the relief through hole 62, so as to provide sufficient space for the eccentric seat 6 to slide relative to the base 1 in the radial direction of the base 1.

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

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

[0071] Please refer to Figures 1 to 4, the continuously variable transmission further includes a second driving wheel 7 and a second locking member 8. The second driving wheel 7 is rotatably disposed outside the base 1 and on the side of the variable speed generating wheel 3 away from the first driving wheel 2, and the second driving wheel 7 is coaxially disposed with the base 1; the second locking member 8 is slidably assembled on the variable speed generating wheel 3 along the circumferential direction of the base 1 and slidably connected to the second driving wheel 7 along the radial direction of the base 1. The second locking member 8 is fixed to the variable speed generating wheel 3 in the radial direction of the base 1 and fixed to the second driving wheel 7 in the circumferential direction of the base 1, so that when the variable speed generating wheel 3 rotates, the second driving wheel 7 can be driven to rotate through the second locking member 8, and the variable speed generating wheel 3 can drive the second locking member 8 to move to be eccentrically disposed relative to the second driving wheel 7; there are a plurality of second locking members 8, and the plurality of second locking members 8 are distributed in the circumferential direction of the variable speed generating wheel 3 and enclose a concentric circle coaxially disposed with the variable speed generating wheel 3; wherein, the second locking member 8 has a locking state in which it can be fixed to the variable speed generating wheel 3 along the first direction and an unlocking state in which it can slide relative to the variable speed generating wheel 3 along the second direction. When the variable speed generating wheel 3 is eccentric relative to the second driving wheel 7 and each second locking member 8 slides along the first direction, only the second locking member 8 with the maximum linear velocity is fixed to the variable speed generating wheel 3.

[0072] When adjusting the speed regulating wheel 4 to drive the variable speed generating wheel 3 to move a certain distance along the radial direction of the base 1, the variable speed generating wheel 3 is eccentrically disposed relative to the second driving wheel 7, and the concentric circle coaxially disposed with the variable speed generating wheel 3 formed by enclosing each second locking member 8 is eccentrically disposed relative to the second driving wheel 7. When the variable speed generating wheel 3 rotates in the first direction, each second locking member 8 can have continuous linear velocity changes and angular velocity changes on the variable speed generating wheel 3. Only the second locking member 8 with the maximum linear velocity is fixed to the variable speed generating wheel 3, and the remaining second locking members 8 follow on the variable speed generating wheel 3. The second driving wheel 7 rotates synchronously with the second locking member 8 with the maximum linear velocity. Thus, the eccentric distance between the variable speed generating wheel 3 and the second driving 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 driving wheel 7 changes, completing the adjustment of the rotation speed of the second driving wheel 7 and realizing stepless speed change.

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

[0074] It should be understood that the second driving wheel 7, the second locking member 8 and the speed-changing driving wheel 3 form an overrunning clutch. Taking the speed-changing driving wheel 3 as the speed input wheel as an example, when the speed-changing driving wheel 3 rotates clockwise, the second locking member 8 is fixed to the speed-changing driving wheel 3, and all the second locking members 8 rotate clockwise following the speed-changing driving wheel 3, and all the second locking members 8 drive the second driving wheel 7 to rotate clockwise. When the speed-changing driving wheel 3 rotates counterclockwise, all the second locking members 8 can slide relative to the speed-changing driving wheel 3, and at this time the second driving wheel 7 remains stationary.

[0075] Please refer to Figure 3 and Figure 4 , on the side of the speed-changing driving wheel 3 close to the second driving wheel 7, there is an annular second installation groove 32. The second installation groove 32 is coaxially arranged with the speed-changing driving wheel 3, and a plurality of second locking members 8 are slidably assembled in the second installation groove 32. Among them, arranging the second locking members 8 in the second installation groove 32 can not only ensure that the second locking members 8 slide along the circumferential direction of the base 1, but also ensure that the second locking members 8 are fixed to the speed-changing driving wheel 3 in the radial direction of the base 1. On the side of the second driving wheel 7 close to the speed-changing driving wheel 3, there are a plurality of second connecting grooves 71 with lengths extending along the radial direction of the base 1. There are a plurality of second connecting grooves 71, and the plurality of second connecting grooves 71 are spaced apart around the central axis of the second driving wheel 7, and a plurality of second locking members 8 are slidably connected to the plurality of second connecting grooves 71 in a one-to-one correspondence. Among them, arranging the second locking members 8 in the second connecting grooves 71 can not only ensure that the second locking members 8 slide along the radial direction of the base 1, but also ensure that the second locking members 8 are fixed to the second driving wheel 7 in the circumferential direction of the base 1.

[0076] Please refer to Figure 3 and Figure 4 , in a specific example, there can be eight second locking members 8. There are eight second connecting grooves 71 evenly spaced on the second driving 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 angle between any two adjacent second locking members 8 is different, and there are countless included angles between any two adjacent second locking members 8. When the speed-changing driving wheel 3 and the second driving wheel 7 are eccentrically arranged, when the speed-changing driving wheel 3 is rotated clockwise, only the second locking member 8 with the maximum linear velocity is fixed to the speed-changing driving wheel 3, and the remaining seven second locking members 8 follow in the second installation groove 32. When the speed-changing driving wheel 3 is continuously rotated, the linear velocity of each second locking member 8 continuously changes, and the second locking member 8 with the maximum linear velocity will automatically lock the speed-changing driving wheel 3 to drive the second driving wheel 7 to rotate in relay, so as to complete the speed change.

[0077] Please refer to Figure 4 , Figure 9 and Figure 10, the second locking member 8 includes a second sliding seat 81, a second guiding portion 82, a second locking portion 83, and a second elastic portion. The second sliding seat 81 is slidably assembled in the second installation groove 32. The second sliding seat 81 is provided with a second accommodation groove 811. The second installation groove 32 is provided with a relatively distributed second inner side wall 321 and a second outer side wall 322. The notch of the second accommodation groove 811 is oppositely arranged with the second outer side wall 322. The two 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 sliding of the second sliding seat 81 in the second installation groove 32, and the second sliding seat 81 abuts against the second inner side wall 321. The second guiding portion 82 is fixed to the bottom wall of the second sliding seat 81 opposite to the notch of the second accommodation groove 811. One side of the second guiding portion 82 opposite to the notch of the second accommodation groove 811 is provided with a second guiding inclined surface 821. The second guiding inclined surface 821 is inclined in the second direction from the top end to the bottom end; wherein, the distance between the top end of the second guiding inclined surface 821 and the second outer side wall 322 is less than the distance between the bottom end of the second guiding inclined surface 821 and the second outer side wall 322. The second locking portion 83 is received in the second accommodation groove 811. One side of the second locking portion 83 is slidably assembled on the second guiding inclined surface 821, and the other side abuts against the second outer side wall 322. The side of the second locking portion 83 in contact with 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 change generating wheel 3. The second elastic member 84 is received in the second accommodation 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 an elastic force for driving the second locking portion 83 to move towards the top end of the second guiding inclined surface 821.

[0078] According to actual needs, the widths of the two sides of the second sliding seat 81 are smaller than the groove width of the second installation groove 32. The two sides of the second sliding seat 81 are both arc surfaces, and the two arc surfaces of the second sliding seat 81 in contact with the second inner side wall 321 are concave, and the other arc surface is convex; the second guiding portion 82 can be integrally or separately provided with the second sliding seat 81. The second guiding portion 82 can be a wedge-shaped 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 change generating wheel 3 is rotated clockwise, the second sliding seat 81 abuts against the second inner side wall 321. The second locking portion 83 is located at the top end of the second guiding portion 82, and the second locking portion 83 abuts against the second outer side wall 322, so that the second locking member 8 is in a locked state fixed to the speed change generating wheel 3; when the speed change generating wheel 3 is rotated counterclockwise, the second locking portion 83 is located at the bottom end of the second guiding portion 82, and there is a gap between the second locking portion 83 and the second outer side wall 322, so that the second locking member8 can slide relative to the speed change generating wheel 3.

[0080] Please refer to Figure 9 and Figure 10 The second locking member 8 further includes a second connecting portion 85, a second protective sleeve 86 and a second friction block 87. The arrangement of the second connecting portion 85, the second protective sleeve 86 and the second friction block 87 in the second locking member 8 is the same as that of the first connecting portion 55, the first protective sleeve 56 and the first friction block 57 in the first locking member 5, and will not be described repeatedly herein.

[0081] It should be noted that the first locking member 5 and the second locking member 8 in the embodiments of the present invention do not require an external triggering structure to trigger so as to be fixed to the variable speed generating wheel 3 or slidable relative to the variable speed generating wheel 3, so that the components cooperating with the triggering structure can be removed from the first locking member 5 and the second locking member 8, greatly simplifying the structures of the first locking member 5 and the second locking member 8.

[0082] Please refer to Figure 3 and Figure 4 The continuously variable transmission further includes a second inner friction ring 30, a second outer friction ring 40 and a second limiting 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 arrangement of the second inner friction ring 30 and the second outer friction ring 40 can prevent the variable speed generating wheel 3 from being worn. The second limiting ring 50 is fixed on the variable speed generating wheel 3 and is disposed above the second mounting groove 32. The second limiting ring 50 is used to prevent the second locking member 8 from shaking up and down in the second mounting groove 32.

[0083] Please refer to Figure 1 , Figure 3 and Figure 5 The continuously variable transmission further 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 variable 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 further arranged on the base 1, and the eccentric seat 6 is slidably assembled to the support plate 12.

[0084] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A continuously variable transmission, characterized in that, Comprising: A base; A first driving wheel, rotatably arranged on the outer side of the base, and the first driving wheel is coaxially arranged with the base; A speed change generating wheel, rotatably arranged on the outer side of the base and located on one side of the first driving wheel, the speed change generating wheel is slidably assembled on the base along the radial direction of the base, and the rotating shaft between the speed change generating wheel and the base is parallel or coaxial with the central axis of the base; A speed regulating wheel, rotatably arranged on the base, the speed regulating wheel is connected to the speed change generating wheel, and the speed regulating wheel is used to drive the speed change generating wheel to slide, so that the speed change generating wheel is eccentrically arranged relative to the first driving wheel; and, A first locking member, slidably assembled on the speed change generating wheel along the circumferential direction of the base and slidably connected to the first driving wheel along the radial direction of the base, the first locking member is fixedly connected to the speed change generating wheel in the radial direction of the base and fixedly connected to the first driving wheel in the circumferential direction of the base, there are a plurality of the first locking members, and the plurality of the first locking members are distributed in the circumferential direction of the speed change generating wheel and enclose a concentric circle coaxially arranged with the speed change generating wheel; Wherein, the first locking member has a locking state in which it can be fixedly connected to the speed change generating wheel along a first direction and an unlocking state in which it can slide relative to the speed change generating wheel along a second direction, the first direction and the second direction are opposite, when the speed change generating wheel is eccentric relative to the first driving wheel and each of the first locking members slides along the first direction, only the first locking member with the maximum linear velocity is fixedly connected to the speed change generating wheel.

2. The continuously variable transmission according to claim 1, characterized in that, A ring-shaped first installation groove is provided on the side of the speed change generating wheel close to the first driving wheel, the first installation groove is coaxially arranged with the speed change generating wheel, and the plurality of the first locking members are slidably assembled in the first installation groove; A first connection groove with a length extending along the radial direction of the base is provided on the side of the first driving wheel close to the speed change generating wheel, there are a plurality of the first connection grooves, the plurality of the first connection grooves are spaced apart around the central axis of the first driving wheel, and the plurality of the first locking members are slidably connected to the plurality of the first connection grooves in a one-to-one correspondence.

3. The continuously variable transmission according to claim 2, wherein, The first locking member includes: A first sliding seat, slidably assembled in the first installation groove, the first sliding seat is provided with a first accommodation groove, the first installation groove is provided with a first inner side wall and a first outer side wall which are oppositely distributed, the notch of the first accommodation groove is opposite to the first outer side wall, both 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 guiding portion, fixed to the bottom wall of the first sliding seat opposite to the notch of the first accommodation groove, a first guiding inclined surface is provided on one side of the first guiding portion opposite to the notch of the first accommodation groove, and the first guiding inclined surface inclines along the first direction from the top end to the bottom end; The first locking part is received in the first accommodating groove. One side of the first locking part is slidably assembled on the first guiding inclined surface, and the other side abuts against the first outer wall. The side of the first locking part in contact with the first outer wall is adapted to the first outer wall; and, The first elastic member is received in the first accommodating groove. One end of the first elastic member is connected to the first locking part, and the other end is connected to the first sliding seat. The first elastic member is used to provide an elastic force for driving the first locking part to move towards the top of the first guiding inclined surface.

4. The continuously variable transmission according to claim 1, wherein The continuously variable transmission further includes an eccentric seat. The eccentric seat is sleeved outside the base and is slidably assembled on the base along the radial direction of the base. The variable speed generating wheel is rotatably arranged outside the eccentric seat, and the variable speed generating wheel is fixed to the eccentric seat in the radial direction of the base; Wherein, 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 to enable the speed regulating wheel to drive the eccentric seat to slide relative to the base.

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

6. The continuously variable transmission according to claim 4, wherein A relief through hole is provided on the eccentric seat, and the length of the relief through hole extends along the radial direction of the base; A notch is provided on the circumferential surface of the base. The base is slidably assembled in the relief through hole, and at least part of the notch is located in the relief through hole.

7. The continuously variable transmission according to claim 1, characterized in that, The continuously variable transmission further includes: A second driving wheel, which is rotatably arranged outside the base and is located on the side of the variable speed generating wheel away from the first driving wheel. The second driving wheel is coaxially arranged with the base; and, A second locking member, which is slidably assembled on the variable speed generating wheel along the circumferential direction of the base and is slidably connected to the second driving wheel along the radial direction of the base. The second locking member is fixed to the variable speed generating wheel in the radial direction of the base and is fixed to the second driving wheel in the circumferential direction of the base. There are a plurality of second locking members, and the plurality of second locking members are distributed in the circumferential direction of the variable speed generating wheel and enclose a concentric circle coaxially arranged with the variable speed generating wheel; Wherein, the second locking member has a locking state in which it can be fixed to the variable speed generating wheel along the first direction and an unlocking state in which it can slide relative to the variable speed generating wheel along the second direction. When the variable speed generating wheel is eccentric relative to the second driving wheel and each second locking member slides along the first direction, only the second locking member with the maximum linear velocity is fixed to the variable speed generating wheel.

8. The continuously variable transmission according to claim 7, characterized in that, On one side of the variable-speed driving wheel close to the second driving wheel, there is an annular second mounting groove coaxially arranged with the variable-speed driving wheel, and a plurality of the second locking members are slidably assembled in the second mounting groove; On the two sides of the second driving wheel close to the variable-speed driving wheel, there are second connecting grooves extending along the radial direction of the base. There are a plurality of the second connecting grooves, which are spaced apart around the central axis of the second driving wheel, and a plurality of the second locking members are slidably connected to the plurality of second connecting grooves in a one-to-one correspondence.

9. The continuously variable transmission according to claim 8, wherein The second locking member includes: A second sliding seat 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 oppositely distributed second inner side walls and second outer side walls. The notch of the second accommodating groove is oppositely arranged with 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 guiding portion fixed to the bottom wall of the second sliding seat opposite to the notch of the second accommodating groove. One side of the second guiding portion opposite to the notch of the second accommodating groove is provided with a second guiding inclined surface, and the second guiding inclined surface is inclined in the second direction from the top end to the bottom end; A second locking portion accommodated in the second accommodating groove. One side of the second locking portion is slidably assembled on the second guiding inclined surface, and the other side abuts against the second outer side wall. The side of the second locking portion in contact with the second outer side wall is adapted to the second outer side wall; and, A second elastic member 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. The second elastic member is used to provide an elastic force for driving the second locking portion to move towards the top end of the second guiding inclined surface.

10. A bicycle, characterized in that, It includes a continuously variable transmission according to any one of claims 1-9.

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