Continuously variable transmission and bicycle

Abstract

The invention provides a continuously variable transmission and a bicycle. The continuously variable transmission comprises a base, a power wheel, a variable speed generation wheel, a speed regulation assembly and a follow-up regulation assembly. The follow-up adjusting assembly is fixed relative to the speed change generation wheel in the radial direction of the base and fixed relative to the power wheel in the circumferential direction of the base. When the speed change generation wheel is eccentric relative to the power wheel and the power wheel rotates in the first direction, the follow-up adjusting assembly with the maximum linear speed is fixed relative to the speed change generation wheel. In addition, a first elastic piece is arranged in the follow-up adjusting assembly and is connected between the sliding seat and the guide body; the first elastic piece has elastic force so that the sliding base and the guiding body can be far away from each other in the circumferential direction of the base, and the follow-up adjusting assembly can be tightly attached to the power wheel in the circumferential direction of the base. Non-friction continuous stepless speed change can be achieved, the transmission torque is large, and the transmission efficiency is high; and gaps and idle strokes of the follow-up adjusting assembly and the power wheel in the circumferential direction can be eliminated, jamming and power interruption are avoided, and stepless speed change adjustment is better achieved.

Description

Technical Field

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

[0002] Continuously variable transmissions can be roughly divided into two categories: one relies on friction transmission, such as CVT (belt type, chain type) and CVP (ball type), but has disadvantages such as small transmission torque, large transmission efficiency loss, easy wear of transmission parts (belts, chains, steel balls), large size, and heavy weight; the other is pulsating type, but the transmission is discontinuous and belongs to intermittent transmission, with a large speed fluctuation range, large size, heavy weight, and relatively complex adjustment. Summary of the Invention

[0003] The technical purpose of the present invention is to provide a follow-up adjustment component, aiming to solve the technical problems of various defects in the continuously variable transmission in the related art.

[0004] The transmission unit is a gear train coupled to the transmission unit, wherein the gear train is coupled to the transmission unit and the transmission unit is coupled to the transmission unit, wherein the gear train is coupled to the transmission unit and the transmission unit is coupled to the transmission unit. and a control wheel that is located adjacent to the control wheel and has a first end for rotating the control wheel and a second end for rotating the control wheel.

[0005] Furthermore, in some embodiments, a guide groove is provided on the side of the power wheel close to the speed change generating wheel, and the guide groove corresponds one-to-one to the follow-up adjustment assembly; the sliding seat includes a first bearing, and the guide body includes a second bearing, and the first bearing and the second bearing are arranged in the guide groove; as the sliding seat and the guide body move away from each other along the circumference of the base, the size of the first bearing and the second bearing along the axial projection surface of the base in the width direction of the guide groove gradually increases.

[0006] Furthermore, in some embodiments, the sliding seat also includes a first main body fixed relative to the first bearing, the guide body also includes a second main body fixed relative to the second bearing, the second main body is inserted into the first main body along the axial direction of the base, and the first main body and the second main body are at least partially arranged on the speed generating wheel; the first elastic member is used to provide an elastic force that causes the first main body and the second main body to move away from each other along the circumference of the base.

[0007] Furthermore, in some embodiments, a wear-resistant portion is provided in the guide groove, and the wear-resistant portion and the opposite sides of the guide groove form two power driving surfaces arranged opposite to each other along the width direction, and the first bearing is supported on both sides of the width direction against the two power driving surfaces.

[0008] Further, in some embodiments, the first elastic member is a torsion spring, which includes a fulcrum portion connected to the sliding seat, and two abutting portions extending from the fulcrum portion along a tangential direction, the rotating shaft is arranged at the fulcrum portion, and the rotating shaft is parallel to the axial direction of the base, wherein one of the abutting portions abuts against the first main body, and the other abutting portion abuts against the second main body.

[0009] Further, in some embodiments, the speed generating wheel is provided with an annular groove arranged along the circumference of the base toward the direction of the power wheel, and the first main body and the second main body are at least partially provided in the annular groove; the first main body has a cavity, and the follow-up adjustment assembly includes a locking member connected to the cavity; the locking member can protrude from the cavity along the radial part of the base to abut against the annular groove, and the locking member can protrude from the cavity along the radial part of the base to abut against the annular groove, so that the follow-up adjustment assembly has a locked state in which it can be fixed to the speed generating wheel along a first direction; or, the locking member can extend radially into the cavity to slide along the annular groove, so that it has an unlocked state in which it slides along the annular groove in a second direction, and the first direction and the second direction are opposite.

[0010] Further, in some embodiments, the cavity has a radial opening toward the base; a first side and a second side are arranged opposite to each other along the circumference of the base, and a guide slope connected between the first side and the second side; the guide slope and the opening are arranged opposite to each other in the radial direction; the locking member contacts the guide slope and can slide along the guide slope; and, along the circumference of the base, from the first side to the second side, the size of the cavity is gradually expanded through the guide slope; wherein, along the circumference, the direction from the second side to the first side is the first direction; the follow-up adjustment assembly also includes a second elastic member, which is used to provide an elastic force that presses against the first side and the annular groove.

[0011] Furthermore, in some embodiments, the first body is provided with two cavities along the circumferential direction, and the follow-up adjustment assembly includes the locking members corresponding to the cavities one by one.

[0012] Furthermore, in some embodiments, the first body has at least one first sliding guide surface protruding radially along the base, and the second body has at least one second sliding guide surface protruding radially along the base; the annular groove is provided with a first annular surface corresponding to the first sliding guide surface, and a second annular surface corresponding to the second sliding guide surface.

[0013] Furthermore, in some embodiments, a bicycle includes the continuously variable transmission as described above.

[0014] Compared with the related art, the continuously variable transmission of the present invention has the following advantages:

[0015] The speed regulating assembly can make the speed generating wheel move radially relative to the power wheel, so that the speed generating wheel and the power wheel are eccentrically arranged. In this way, the eccentric distance of the speed generating wheel relative to the power wheel can be changed by the speed regulating assembly. In addition, the follow-up adjustment assembly and the speed generating wheel are relatively fixed in the radial direction. In this way, when the speed generating wheel and the power wheel are eccentrically arranged, the concentric circles composed of multiple follow-up adjustment assemblies are also eccentrically arranged with the power wheel. In addition, the follow-up adjustment assembly and the power wheel are relatively fixed in the circumferential direction, so that when the power wheel rotates in the circumferential direction, the concentric circles composed of multiple follow-up adjustment assemblies can be driven to rotate. Therefore, after the speed generating wheel is eccentrically arranged, when the power wheel rotates in the circumferential direction, the concentric circles composed of multiple follow-up adjustment assemblies can rotate around the eccentric center of the circle. While rotating, the follow-up adjustment assembly can slide relative to the power wheel in the radial direction, so that the follow-up adjustment assembly can undergo continuous linear velocity changes and angular velocity changes. When the power wheel rotates in a first direction, the follow-up adjustment assembly with the highest linear velocity is fixed to the speed generating wheel, and the remaining follow-up adjustment assemblies follow the speed generating wheel, so that the speed generating wheel can rotate along with the follow-up adjustment assembly with the highest linear velocity, so that the follow-up adjustment assembly can drive the speed generating wheel to rotate, and at this time, the rotational speed of the speed generating wheel will change relative to the power wheel. As can be seen, in the embodiment of the present invention, by eccentrically arranging the speed generating wheel and the power wheel, and cooperating with the follow-up adjustment assembly, the rotational speed of the speed generating wheel can be ultimately changed. In this way, by changing the eccentric distance of the speed generating wheel relative to the power wheel, the maximum linear velocity of the follow-up adjustment assembly can be changed, so that the rotational speed of the speed generating wheel is changed, and the rotational speed of the speed generating wheel is adjusted to achieve stepless speed change. In addition, the continuously variable transmission of the embodiment of the present invention is a non-friction continuous stepless speed change, with large torque transmission, high transmission efficiency, variable speed in static state, rotating state and riding state, convenient speed regulation, light weight and small size.

[0016] Furthermore, the follow-up adjustment component includes a sliding seat, a guide body and a first elastic member. The sliding seat and the guide body can be close to each other or away from each other by a preset distance along the first circumferential direction. When the follow-up adjustment component is assembled on the continuously variable transmission, the first elastic member can provide elastic force so that the follow-up adjustment component is tightly attached to the power wheel. In this way, the gap and idle travel along the circumferential direction between the follow-up adjustment component and the power wheel can be eliminated, the connection stability along the circumferential direction between the follow-up adjustment component and the power wheel can be improved, the smoothness of the rotation of the follow-up adjustment component driven by the power wheel can be improved, and jamming and power interruption can be avoided. In this way, the continuously variable transmission can better realize stepless speed adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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.

[0018] Figure 1 is a schematic structural diagram of a continuously variable transmission according to an embodiment of the present invention;

[0019] Figure 2 is an exploded view of a continuously variable transmission according to an embodiment of the present invention;

[0020] Figure 3 is an exploded view of a portion of the structure of a continuously variable transmission according to an embodiment of the present invention;

[0021] Figure 4 is a schematic structural diagram of a continuously variable transmission after displacement in an embodiment of the present invention;

[0022] Figure 5 1 is a schematic diagram of the three-dimensional structure of the follow-up adjustment component in an embodiment of the present invention;

[0023] Figure 6 is a schematic structural diagram of a follow-up adjustment component in a first viewing angle according to an embodiment of the present invention;

[0024] Figure 7 is an exploded view of the follow-up adjustment assembly in an embodiment of the present invention;

[0025] Figure 8 is a cross-sectional schematic diagram of a follow-up adjustment assembly in an embodiment of the present invention;

[0026] Figure 9 Schematic diagram of the connection between the follow-up adjustment component and the speed-changing generating wheel in an embodiment of the present invention;

[0027] Figure 10 This is an exploded view of the structure of the follow-up adjustment component and the speed-changing generating wheel in an embodiment of the present invention;

[0028] Figure 11 Schematic diagram of the structure of the power wheel in an embodiment of the present invention.

[0029] In the accompanying drawings, each reference numeral represents:

[0030] 1. Base;

[0031] 2. Power wheel; 201. Speed ​​input wheel; 202. Speed ​​output wheel;

[0032] 21. Guide groove; 211. Power driving surface; 212. Wear-resistant portion;

[0033] 3. Speed-changing generating wheel; 31. Annular groove; 311. Second annular surface;

[0034] 4. Speed ​​regulating assembly; 41. Eccentric seat; 42. Transmission gear; 43. Transmission rack; 44. Driving source;

[0035] 5. Follow-up adjustment component;

[0036] 51. Sliding seat; 511. First bearing;

[0037] 512, first body; 5121, cavity;

[0038] 5121A, first side; 5121B, second side; 5121C, guide slope;

[0039] 5122, first sliding guide surface;

[0040] 52. Guide body; 521. Second bearing; 522. Second main body; 5221. Second sliding guide surface;

[0041] 53. torsion spring; 531. fulcrum; 532. supporting portion;

[0042] 54. Locking member; 55. Second elastic member;

[0043] 6. Protective cover. DETAILED DESCRIPTION

[0044] The following describes in detail embodiments of the present invention, examples of which 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, and are not to be construed as limiting the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0045] 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", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0047] See Figures 1 to 11 The embodiment of the present invention provides a continuously variable transmission, including a base 1, a power wheel 2, a speed-changing wheel 3, a speed-regulating component 4 and a follow-up adjusting component 5; the power wheel 2 is coaxially arranged with the base 1 and rotatably connected to the base 1; the speed-changing wheel 3 is connected to one side of the power wheel 2; the speed-regulating component 4 is connected to the base 1 and the speed-changing wheel 3, and is used to make the speed-changing wheel 3 move relative to the power wheel 2 along the radial direction of the base 1, so that the speed-changing wheel 3 and the power wheel 2 are coaxially aligned or eccentrically arranged; the follow-up adjusting component 5 is relatively fixed to the speed-changing wheel 3 along the radial direction of the base 1 and relatively fixed to the power wheel 2 along the circumference of the base 1; the follow-up adjusting component 5 can be slidably connected to the speed-changing wheel 3 along the circumference of the base 1 and can be slidably connected to the power wheel 2 along the radial direction of the base 1; multiple follow-up adjusting components 5 are circumferentially connected to the speed-changing wheel 3 The two wheels are arranged in a direction and enclosed to form a concentric circle coaxially arranged with the speed generating wheel 3. When the speed generating wheel 3 is eccentric with respect to the power wheel 2 and the power wheel 2 rotates along the first direction, the follow-up adjustment component 5 with the largest linear velocity is fixed relatively to the speed generating wheel 3; the first direction is clockwise or counterclockwise; the follow-up adjustment component 5 includes a sliding seat 51, a guide body 52 and a first elastic member; the first elastic member is connected between the sliding seat 51 and the guide body 52, and the sliding seat 51 and the guide body 52 can approach each other or move away from each other by a preset distance along the circumference of the base 1; the first elastic member has an elastic force to make the sliding seat 51 and the guide body 52 move away from each other along the first circumferential direction, so that the follow-up adjustment component 5 is tightly attached to the power wheel 2 along the circumference of the base 1, wherein the first elastic member has a rotating shaft, and the first circumferential direction is the rotation direction along the rotating shaft.

[0048] In an embodiment of the present invention, the speed regulating assembly 4 can cause the speed-changing wheel 3 to move radially relative to the power wheel 2, allowing the speed-changing wheel 3 and the power wheel 2 to be eccentrically arranged. Thus, the eccentric distance of the speed-changing wheel 3 relative to the power wheel 2 can be varied by the speed regulating assembly 4. Furthermore, the follower adjustment assembly 5 and the speed-changing wheel 3 are relatively fixed in the radial direction. Thus, when the speed-changing wheel 3 and the power wheel 2 are eccentrically arranged, the concentric circles formed by the multiple follower adjustment assemblies 5 are also eccentrically arranged relative to the power wheel 2. Furthermore, the follower adjustment assembly 5 and the power wheel 2 are relatively fixed in the circumferential direction, allowing the power wheel 2 to rotate circumferentially, thereby driving the concentric circles formed by the multiple follower adjustment assemblies 5 to rotate. Therefore, after the speed-changing wheel 3 is eccentrically arranged, when the power wheel 2 rotates circumferentially, the concentric circles formed by the multiple follower adjustment assemblies 5 can rotate about the eccentric center of the circle. While rotating, the follower adjustment assembly 5 can slide radially relative to the power wheel 2, allowing the follower adjustment assembly 5 to continuously change its linear velocity and angular velocity. Among them, when the power wheel 2 rotates along the first direction, the follow-up adjustment component 5 with the largest linear velocity will be fixed to the speed generating wheel 3, and the remaining follow-up adjustment components 5 will follow the speed generating wheel 3, so that the speed generating wheel 3 can rotate following the follow-up adjustment component 5 with the largest linear velocity, so that the speed generating wheel can be driven to rotate by the follow-up adjustment component 5, and at this time, the rotation speed of the speed generating wheel 3 will change relative to the power wheel 2. It can be seen that in the embodiment of the present invention, by eccentrically setting the speed generating wheel 3 and the power wheel 2, and cooperating with the follow-up adjustment component 5, the rotation speed of the speed generating wheel 3 can be ultimately changed. In this way, by changing the eccentric distance of the speed generating wheel 3 relative to the power wheel 2, the maximum linear velocity of the follow-up adjustment component 5 can be changed, so that the rotation speed of the speed generating wheel 3 is changed, the rotation speed of the speed generating wheel 3 is adjusted, and stepless speed change is achieved. Furthermore, the continuously variable transmission of the embodiment of the present invention is a non-friction continuous continuously variable transmission, has a large transmission torque, a high transmission efficiency, can change speeds in a stationary state, a rotating state, and a riding state, is easy to adjust, and is light in weight and small in size.

[0049] It should be noted that the first direction may be a clockwise direction or a counterclockwise direction. In addition, illustratively, the power wheel 2 may be a speed input wheel 201 , and the speed generating wheel 3 may be a speed output wheel 202 .

[0050] Furthermore, the follow-up adjustment component 5 includes a sliding seat 51, a guide body 52 and a first elastic member. The sliding seat 51 and the guide body 52 can be close to each other or away from each other by a preset distance along the first circumferential direction. When the follow-up adjustment component 5 is assembled on the continuously variable transmission, the first elastic member can provide elastic force so that the follow-up adjustment component 5 is tightly attached to the power wheel 2. In this way, the gap and idle travel along the circumferential direction between the follow-up adjustment component 5 and the power wheel 2 can be eliminated, the connection stability of the follow-up adjustment component 5 and the power wheel 2 along the circumferential direction can be improved, the smoothness of the rotation of the power wheel 2 driving the follow-up adjustment component 5 can be improved, and jamming and power interruption can be avoided. In this way, the continuously variable transmission can better realize stepless speed adjustment.

[0051] Furthermore, in some embodiments, a guide groove 21 is provided on the side of the power wheel 2 close to the speed generating wheel 3, and the length of the guide groove 21 extends along the radial direction of the base 1, and the guide groove 21 corresponds one-to-one to the follow-up adjustment component 5; the sliding seat 51 includes a first bearing 511, and the guide body 52 includes a second bearing 521, and the first bearing 511 and the second bearing 521 are arranged in the guide groove 21; as the sliding seat 51 and the guide body 52 move away from each other along the circumference of the base 1, the dimensions of the first bearing 511 and the second bearing 521 along the axial projection surface of the base 1 in the width direction of the guide groove 21 gradually increase.

[0052] Specifically, the follow-up adjustment component 5 and the guide groove 21 correspond one to one, and a plurality of guide grooves 21 are arranged at intervals along the circumference of the power wheel 2 to form concentric circles coaxial with the power wheel 2. In addition, the length direction of the guide groove 21 is parallel to the radial direction. The first bearing 511 and the second bearing 521 of the follow-up adjustment component 5 are arranged in the guide groove 21. When the speed generating wheel 3 is eccentrically arranged relative to the power wheel 2, as the power wheel 2 rotates, the first bearing 511 and the second bearing 521 move along the length direction of the guide groove 21. In addition, the first bearing 511 and the second bearing 521 are arranged in sequence along the axial direction of the base 1. When the first elastic member is compressed and the first sliding seat 51 and the guide body 52 approach each other, the area of ​​the first bearing 511 and the second bearing 521 overlapping in the axial direction decreases ( Figure 6 When the first elastic member is released, the first sliding seat 51 and the guide body 52 move away from each other under the action of the reset force of the first elastic member, and the axial overlap area of ​​the first bearing 511 and the second bearing 521 increases ( Figure 6E in it will gradually increase), at this time, when the first bearing 511 and the second bearing 521 are set in the guide groove 21, the two sides of the guide groove 21 along the width direction and the elastic member can work together, so that the first bearing 511 and the second bearing 521 are tightly fitted with the guide groove 21 on both sides along the width direction of the guide groove 21, that is, through the first elastic member, the first bearing 511 and the second bearing 521 can adapt to the guide groove 21, so that the circumferential gap and idle travel between the follow-up adjustment component 5 and the guide groove 21 of the power wheel 2 can be eliminated, the circumferential connection stability of the follow-up adjustment component 5 and the guide groove 21 can be improved, and the smoothness of the rotation of the follow-up adjustment component 5 driven by the guide groove 21 of the power wheel 2 can be improved, avoiding jamming and power interruption, so that the continuously variable transmission can better realize continuously variable speed adjustment.

[0053] Furthermore, in some embodiments, the sliding seat 51 also includes a first main body 512 fixed relatively to the first bearing 511, the guide body 52 also includes a second main body 522 fixed relatively to the second bearing 521, the second main body 522 is arranged in the first main body 512 along the axial direction of the base 1, and the first main body 512 and the second main body 522 are at least partially arranged on the speed generating wheel 3; the first elastic member is used to provide an elastic force to make the first main body 512 and the second main body 522 move away from each other along the circumference of the base 1.

[0054] In some specific embodiments, the sliding seat 51 includes a first body 512, a first boss connected to the first body 512, and a first bearing 511 that is provided through the boss and is relatively fixed to the first body 512. The guide body 52 includes a second body 522 that is provided through the first boss and has a radial gap with the first boss, a second boss connected to the second body 522, and a second bearing 521 that is provided through the second boss and is relatively fixed to the second body 522. In other words, the first bearing 511 and the first body 512 can be relatively fixed by the first boss, and the second bearing 521 and the second body 522 can be relatively fixed by the second boss. The first main body 512, the second main body 522, the second bearing 521 and the first bearing 511 are arranged in sequence along the axial direction. In this way, when the power wheel 2 drives the follow-up adjustment component 5 to rotate, the driving force of the guide groove 21 of the power wheel 2 can be transmitted through the first bearing 511, the second bearing 521, the first boss, the second boss, the first elastic member, the first main body 512 and the second main body 522, so that no matter what changes occur in the angle of the driving force of the guide groove 21 of the power wheel 2, it will not affect the tangential force of the follow-up adjustment component 5 in the speed generating wheel 3, thereby ensuring the stability of the follow-up sliding of the follow-up adjustment component 5 in the speed generating wheel 3.

[0055] Furthermore, in some embodiments, a wear-resistant portion 212 is provided within the guide groove 21. The wear-resistant portion 212 and the opposite side of the guide groove 21 form two power drive surfaces 211 disposed opposite each other along the width direction. The first bearing 511 abuts against the two power drive surfaces 211 on both sides along the width direction. The first bearing 511 slides along the guide groove 21. The interaction between the first bearing 511 and the power drive surfaces 211 protects the first bearing 511 and increases its service life.

[0056] In some specific embodiments, the wear-resistant portion 212 extends radially, with one side of the wear-resistant portion 212 abutting against a side wall of the guide groove 21 along the width thereof. One power drive surface 211 may be the other side of the wear-resistant portion 212, and the other power drive surface 211 may be the other side wall of the guide groove 21 along the width thereof. Both sides of the first bearing 511 may respectively abut against the two power drive surfaces 211. In this manner, the guide groove 21 can better guide the follow-up adjustment assembly 5 in radial movement, further improving the sliding stability of the follow-up adjustment assembly 5 within the guide groove 21 of the power wheel 2. Furthermore, the wear-resistant portion 212 may be made of a wear-resistant material. The provision of the wear-resistant portion 212 can prevent wear when the follow-up adjustment assembly 5 and the guide groove 21 slide relative to each other.

[0057] Furthermore, in some embodiments, the first elastic member is a torsion spring 53, which includes a fulcrum portion 531 connected to the sliding seat 51, and two abutting portions 532 extending from the fulcrum portion 531 along a tangential direction. The rotating axis of the first elastic member is set at the fulcrum portion 531, and the rotating axis is parallel to the axial direction of the base 1, wherein one abutting portion 532 abuts against the first main body 512, and the other abutting portion 532 abuts against the second main body 522.

[0058] For example, under normal circumstances, the first body 512 and the second body 522 are arranged in sequence along the axial direction and there is a gap in the axial direction. At the same time, there is also a gap between the first body 512 and the second body 522 in the circumferential direction. The torsion spring 53 is arranged in these gap spaces and is compressed (the first body 512 and the second body 522 are closed) or reset (the first body 512 and the second body 522 are open) in these gap spaces.

[0059] Specifically, in the gap space, a rotating shaft can be protruded axially on the side of the second body 522 facing the guide body 52, and the fulcrum portion 531 of the torsion spring 53 can be sleeved on the rotating shaft to achieve the positioning connection of the fulcrum portion 531; and the two abutting portions 532 of the torsion spring 53 respectively abut against the opposite sides of the first body 512 and the second body 522 along the circumferential direction; in this way, the torsion spring 53 can be controlled to approach each other along the circumferential direction (which is equivalent to the first body 512 and the second body 522 closing, driving the first bearing 511 and the second bearing 521 to close). The spring 53 is compressed around the fulcrum portion 531, so that the two abutting portions 532 are close to each other around the fulcrum portion 531; when released, the two abutting portions 532 of the torsion spring 53 move away from each other around the fulcrum portion 531, driving the first body 512 and the second body 522 to move away from each other in the circumferential direction (which is equivalent to the first body 512 and the second body 522 opening, driving the first bearing 511 and the second bearing 521 to open, but due to the action on both sides of the guide groove 21 along the width direction, they cannot be fully opened). Therefore, the torsion spring 53 can make the follow-up adjustment component 5 better adapt to the guide groove 21.

[0060] In other embodiments, the first elastic member may be a spring, an elastic silicone member, etc.

[0061] Further, in some embodiments, see Figures 5 to 8 The speed generating wheel 3 is provided with an annular groove 31 arranged along the circumference of the base 1 toward the direction of the power wheel 2, and the first main body 512 and the second main body 522 are at least partially arranged in the annular groove 31; the first main body 512 has a cavity 5121, and the follow-up adjustment component 5 includes a locking member 54 connected to the cavity 5121; the locking member 54 can protrude from the cavity 5121 along the radial part of the base 1 to abut against the annular groove 31, so that the follow-up adjustment component 5 has a locked state in which it can be fixed to the speed generating wheel 3 along the first direction; or, the follow-up adjustment component 5 can extend into the cavity 5121 radially, so that the follow-up adjustment component 5 has an unlocked state in which it slides along the annular groove 31 in the second direction, and the first direction and the second direction are opposite.

[0062] The continuously variable transmission has unidirectionality. Specifically, the annular groove 31 and the speed generating wheel 3 are coaxially arranged; the tangential direction of the locking member 54 matches the annular groove 31. Figure 8 As shown in (a), when the locking member 54 radially protrudes from the cavity 5121 and abuts against the annular groove 31, the locking member 54 is in a locked state. At this time, the annular groove 31 can be driven to rotate by the follower adjustment component 5, thereby driving the speed generating wheel 3 to rotate; Figure 8As shown in (b), when the locking member 54 radially extends into the cavity 5121 and is located in the cavity 5121, the locking member 54 is in the unlocked state. At this time, the follow-up adjustment component 5 can slide circumferentially in the sliding groove. At this time, the speed generating wheel 3 does not rotate and remains stationary in the circumferential direction. It can be understood that Figure 8 In (a), G is greater than K in (b).

[0063] In addition, one end of the plurality of follow-up adjustment components 5 along the axial direction can be spaced apart in the annular groove 31 of the speed generating wheel 3, and each follow-up adjustment component 5 is relatively fixed to the annular groove 31 (speed generating wheel 3) along the radial direction through the two sides of the annular groove 31; at the same time, the other ends of the plurality of follow-up adjustment components 5 along the axial direction are respectively arranged in the guide groove 21 of the power wheel 2, and each follow-up adjustment component 5 is relatively fixed to the corresponding guide groove 21 (power wheel 2) along the circumferential direction through the two sides of the guide groove 21; and because of the Driven by component 4, the speed generating wheel 3 and the power wheel 2 will be eccentrically arranged. In this way, when the power wheel 2 rotates in the first direction, the follow-up adjustment component 5 can move radially in the guide groove 21, and the follow-up adjustment component 5 with the largest linear velocity and the annular groove 31 are relatively fixed, driving the speed generating wheel 3 to rotate, and the other follow-up adjustment components 5 follow in the annular groove 31, and new follow-up adjustment components 5 with the largest linear velocity are continuously relayed to the previous follow-up adjustment component 5 with the largest linear velocity, driving the speed generating wheel 3 to rotate, thereby realizing stepless speed change.

[0064] The principle of continuously variable speed change is explained in detail below:

[0065] like Figure 4 As shown, the minimum angle N and the maximum angle M between two adjacent follow-up adjustment components 5 are greater than N. The value of M divided by N is the maximum speed range of the speed generating wheel 3. Therefore, the eccentric distance between the speed generating wheel 3 and the power wheel 2 can determine the maximum speed ratio. As the angle N between two adjacent follow-up adjustment components 5 continuously increases to the maximum angle M, the angle between the two adjacent follow-up adjustment components 5 will continuously increase from N to M, thereby forming countless angles, thereby achieving stepless speed change.

[0066] In some specific embodiments, there may be seven follow-up adjustment components 5, and seven guide grooves 21 are correspondingly provided on the power wheel 2. After the speed generating wheel 3 is eccentric relative to the power wheel 2, the angles between any two adjacent follow-up adjustment components 5 are different, and there may be an infinite number of angles between any two adjacent follow-up adjustment components 5. When the power wheel 2 rotates along the first direction, each follow-up adjustment component 5 undergoes continuous changes in linear velocity and angular velocity. Only the follow-up adjustment component 5 with the largest linear velocity is fixed to the speed generating wheel 3. The remaining six follow-up adjustment components 5 follow the annular groove 31 of the speed generating wheel 3. A new follow-up adjustment component 5 with the largest linear velocity continuously relays to the previous follow-up adjustment component 5 with the largest linear velocity, driving the speed generating wheel 3 to rotate, thereby achieving stepless speed change.

[0067] Further, in some embodiments, the cavity 5121 has a radial opening toward the base 1; a first side 5121A and a second side 5121B are arranged opposite to each other along the circumference of the base 1, and a guide bevel 5121C is connected between the first side 5121A and the second side 5121B; the guide bevel 5121C and the opening are arranged opposite to each other in the radial direction; the locking member 54 contacts the guide bevel 5121C and can slide along the guide bevel 5121C; and, along the circumference of the base 1, from the first side 5121A to the second side 5121B, the size of the cavity 5121 is gradually expanded through the guide bevel 5121C; wherein, along the circumference, the direction from the second side 5121B to the first side 5121A is the first direction; the follow-up adjustment assembly 5 also includes a second elastic member 55, which is used to provide an elastic force that causes the locking member 54 to press against the first side 5121A and the annular groove 31.

[0068] Specifically, the first body 512 is disposed in the annular groove 31. Along the circumferential direction, from the second side 5121B to the first side 5121A (i.e., the first direction), the guide slope 5121C is inclined toward the opening, so that the radial size of the cavity 5121 gradually decreases in the direction from the second side 5121B to the first side 5121A. In this way, when the driving power wheel 2 rotates in the first direction and the follow-up adjustment component 5 is driven by the power wheel 2 to rotate synchronously, the locking member 54 can protrude from the cavity 5121 under the action of the second elastic member 55 and abut against the annular groove 31. , the servo adjustment assembly 5 and the annular groove 31 of the speed-changing generating wheel 3 are relatively fixed, allowing the power wheel 2 to drive the speed-changing generating wheel 3 to rotate through the servo adjustment assembly 5, and enter a locked state. When the power wheel 2 is driven in the second direction, the locking member 54 can be gradually changed from protruding from the cavity 5121 to extending into the cavity 5121 under the action of the guide bevel 5121C, thereby allowing the servo adjustment assembly 5 to slide along the annular groove 31. At this time, the speed-changing generating wheel 3 does not rotate and enters an unlocked state. In other words, the servo adjustment assembly 5 and the speed-changing generating wheel 3 can be locked and unlocked by the guide bevel 5121C and the second elastic member 55, realizing unidirectional movement of the continuously variable transmission.

[0069] It should be noted that Figure 8 In the figure, the G value and the K value are safety dimensions required for design. In actual process, when the locking member 54 protrudes from the cavity 5121, the dimension of the corresponding position may be smaller than the G value, that is, the locking member 54 will not completely reach the first side 5121A.

[0070] Furthermore, in some embodiments, the first body 512 further includes an abutment wall proximate to the second side 5121B, with one end of the second elastic member 55 abutting the abutment wall and the other end abutting the locking member 54. Thus, when the power wheel 2 rotates in the second direction, the locking member 54 can compress the second elastic member 55 under the action of the guide slope 5121C, causing the locking member 54 to move from the first side 5121A to the second side 5121B. When the power wheel 2 rotates in the first direction, the second elastic member 55 can exert a force on the locking member 54, causing the locking member 54 to abut against the first side 5121A.

[0071] Exemplarily, a mounting groove may be provided on a side of the first main body 512 of the sliding seat 51 close to the second side 5121B, and a connecting hole connecting the cavity 5121 and the mounting groove may be provided on the second side 5121B. The groove wall facing the connecting hole in the mounting groove may be an abutting wall, and the second elastic member 55 is partially assembled in the mounting groove and partially assembled in the cavity 5121. One end of the second elastic member 55 abuts against the abutting wall and the other end abuts against the locking member 54, thereby increasing the reset force of the locking member 54 so that the locking member 54 can abut against the first side 5121A in the cavity 5121.

[0072] Furthermore, in some embodiments, the first body 512 is provided with two cavities 5121 along the circumferential direction, and the follow-up adjustment assembly 5 includes locking members 54 corresponding to the cavities 5121 one by one.

[0073] Specifically, the sliding seat 51 extends along the circumferential direction, and the sliding seat 51 is arranged in the annular groove 31, so that the sliding groove is arc-shaped. A cavity 5121 can be opened at both ends of the sliding seat 51 along the circumferential direction, and correspondingly, two locking members 54 and two second elastic members 55 are provided. In this way, when the locking member 54 protrudes out of the cavity 5121 and abuts against the annular groove 31, the interaction force between the follow-up adjustment component 5 and the annular groove 31 can be increased, so that the follow-up adjustment component 5 is more stably connected to the annular groove 31, so that the power wheel 2 can better drive the speed generating wheel 3 to rotate through the follow-up adjustment component 5.

[0074] Furthermore, in some embodiments, the first body 512 has at least one first sliding guide surface 5122 protruding radially from the base 1, and the second body 522 has at least one second sliding guide surface 5221 protruding radially from the base 1; the annular groove 31 is provided with a first annular surface corresponding to the first sliding guide surface 5122, and a second annular surface 311 corresponding to the second sliding guide surface 5221.

[0075] Specifically, for a single follow-up adjustment component 5, in addition to the cavity 5121, the first main body 512 can be provided with a first sliding guide surface 5122 protruding from the opening of the cavity 5121. The length of the first sliding guide surface 5122 is arranged along the circumference of the annular groove 31. The first sliding guide surface 5122 and the cavity 5121 can be arranged at intervals along the axial direction so that the first sliding guide surface 5122 will not affect the cavity 5121 and the locking piece 54. Multiple first sliding guide surfaces 5122 can be arranged in sequence along the axial direction or separately on both sides of the first main body 512 in the radial direction without affecting the cavity 5121 and the locking piece 54; the second main body 522 can also be provided with a second sliding guide surface 5221 protruding radially relative to the opening of the cavity 5121. The length of the second sliding guide surface 5221 is arranged along the circumference of the annular groove 31. Multiple second sliding guide surfaces 5221 can be arranged in sequence along the axial direction or separately on both sides of the second main body 522 in the radial direction. The inner sidewall of the annular groove 31 may radially protrude a first annular surface corresponding to the first sliding guide surface 5122, and a second annular surface 311 corresponding to the second sliding guide surface 5221. Multiple first sliding guide surfaces 5122 and second sliding guide surfaces 5221 may be axially spaced apart, or may be provided on both sides of the inner sidewall of the annular groove 31. The abutment between the first sliding guide surface 5122 and the first annular surface, and the abutment between the second sliding guide surface 5221 and the second annular surface 311, facilitates relative sliding between the follow-up adjustment assembly 5 and the annular groove 31, and also facilitates the follow-up adjustment assembly 5 driving the annular groove 31 of the speed generating wheel 3 to rotate.

[0076] Furthermore, in some embodiments, the speed regulating assembly 4 may include an eccentric seat 41, the eccentric seat 41 and the speed changing generating wheel 3 are relatively fixed, and the speed regulating assembly 4 may include a first transmission structure arranged on the eccentric seat 41 and a second transmission structure arranged on the base 1. The first transmission structure and the second transmission structure can interact with each other to achieve coaxial alignment or eccentric setting of the speed changing generating wheel 3 relative to the power wheel 2.

[0077] In some specific embodiments, one of the first transmission structure and the second transmission structure may be a transmission rack 43, and the other may be a transmission gear 42. Through the meshing of the transmission rack 43 and the transmission gear 42, the speed generating wheel 3 can be coaxially aligned or eccentrically arranged relative to the power wheel 2. In other embodiments, the first transmission structure and the second power transmission structure may be worm gear structures.

[0078] Furthermore, in some embodiments, the speed regulation assembly also includes a drive source 44, which can be connected to the base 1. The drive source 44 can be used to drive the transmission gear 42 to rotate, thereby realizing the engagement of the transmission gear 42 and the transmission rack 43, and realizing the coaxial alignment or eccentric setting of the speed change generating wheel 3 and the power wheel 2.

[0079] Furthermore, in some embodiments, the continuously variable transmission may include two power wheels 2, which are respectively arranged on both sides of the speed generating wheel 3 along the axial direction, wherein one power wheel 2 can be used as a speed input wheel 201, and the other power wheel 2 can be used as a speed output wheel 202, so that the continuously variable transmission of the embodiment of the present invention can be a two-stage speed change.

[0080] When it is a speed input wheel 201, it is connected to the outside. External power (for example, pedaling a bicycle) drives the speed input wheel 201 to rotate in a first direction, and the changed speed is ultimately output from the speed output wheel 202. In addition, the speed input wheel 201 can correspond to multiple follow-up adjustment components 5; the speed output wheel 202 can also correspond to multiple follow-up adjustment components 5. In addition, the speed input wheel 201 and the speed output wheel 202 can be switched with each other. Compared with the speed output wheel 202, the speed input wheel 201 has a structure connected to the external power. The rest of the structure of the speed input wheel 201 and the speed output wheel 202 is the same. The speed input wheel 201 and the speed output wheel 202 both include guide grooves 21, etc. In addition, the working principles of the speed input wheel 201 and the speed change generating wheel 3 are the same, and the working principles of the speed output wheel 202 and the speed change generating wheel 3 are the same, which will not be described in detail here.

[0081] Furthermore, in some specific embodiments, a protective cover 6 may be provided at the outermost portion to protect the power wheel 2 and the speed-changing generating wheel 3 .

[0082] Furthermore, in some embodiments, a bicycle includes a bicycle body and a continuously variable transmission. By adjusting the continuously variable transmission, a desired speed ratio within a speed range can be quickly adjusted when the bicycle is stopped, in a riding state, or in a coasting state. Furthermore, the continuously variable transmission of the embodiments of the present invention can better achieve a stepless speed regulation process.

[0083] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0084] The above is a description of the technical solution provided by the present invention. For those skilled in the art, according to the ideas of the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A continuously variable transmission, characterized in that: include: base; a power wheel, coaxially arranged with the base and rotatably connected to the base; A speed-changing generating wheel connected to one side of the power wheel; a speed regulating assembly connected to the base and the speed-changing generating wheel, and configured to move the speed-changing generating wheel relative to the power wheel along the radial direction of the base so that the speed-changing generating wheel and the power wheel are coaxially aligned or eccentrically arranged; and A follow-up adjustment component is relatively fixed to the speed-changing generating wheel along the radial direction of the base and relatively fixed to the power wheel along the circumferential direction of the base; the follow-up adjustment component can be slidably connected to the speed-changing generating wheel along the circumferential direction of the base and can be slidably connected to the power wheel along the radial direction of the base; The plurality of follow-up adjustment components are arranged along the circumference of the speed change generating wheel and enclose a concentric circle coaxially arranged with the speed change generating wheel; When the speed-changing wheel is eccentric relative to the power wheel and the power wheel rotates in a first direction, the follow-up adjustment component with the largest linear velocity is fixed relative to the speed-changing wheel; the first direction is clockwise or counterclockwise; The follow-up adjustment assembly includes a sliding seat, a guide body and a first elastic member; The first elastic member is connected between the sliding seat and the guide body, and the sliding seat and the guide body can approach each other or move away from each other by a preset distance along the circumference of the base; The first elastic member has an elastic force so that the sliding seat and the guide body move away from each other along the first circumferential direction, so that the follow-up adjustment component is tightly attached to the power wheel along the circumference of the base, wherein the first elastic member has a rotating shaft, and the first circumferential direction is the rotation direction along the rotating shaft.

2. The continuously variable transmission according to claim 1, characterized in that A guide groove is provided on one side of the power wheel close to the speed-changing generating wheel, the length of which extends along the radial direction of the base, and the guide groove corresponds to the follow-up adjustment assembly one by one; The sliding seat includes a first bearing, and the guide body includes a second bearing. The first bearing and the second bearing are arranged in the guide groove; as the sliding seat and the guide body move away from each other along the circumference of the base, the dimensions of the first bearing and the second bearing along the axial projection surface of the base in the width direction of the guide groove gradually increase.

3. The continuously variable transmission according to claim 2, characterized in that The sliding seat also includes a first main body fixed relative to the first bearing, and the guide body also includes a second main body fixed relative to the second bearing, the second main body is penetrated by the first main body along the axial direction of the base, and the first main body and the second main body are at least partially arranged on the speed generating wheel; the first elastic member is used to provide an elastic force that causes the first main body and the second main body to move away from each other along the circumference of the base.

4. The continuously variable transmission according to claim 3, characterized in that A wear-resistant portion is provided in the guide groove. The wear-resistant portion and the opposite side of the guide groove form two power driving surfaces arranged opposite to each other along the width direction. Both sides of the first bearing along the width direction abut against the two power driving surfaces.

5. The continuously variable transmission according to claim 3, characterized in that The first elastic member is a torsion spring, which includes a fulcrum portion connected to the sliding seat and two abutting portions extending from the fulcrum portion along a tangential direction. The rotating shaft is arranged at the fulcrum portion, and the rotating shaft is parallel to the axial direction of the base. One of the abutting portions abuts against the first main body, and the other abutting portion abuts against the second main body.

6. The continuously variable transmission according to claim 3, characterized in that The speed-changing generating wheel is provided with an annular groove arranged along the circumference of the base in the direction toward the power wheel, and the first body and the second body are at least partially arranged in the annular groove; The first body has a cavity, and the follow-up adjustment assembly includes a locking member connected to the cavity; The locking member may protrude from the cavity along a radial portion of the base to abut against the annular groove, so that the follow-up adjustment assembly has a locked state in which it can be fixed to the speed generating wheel along a first direction; Alternatively, the locking member may extend radially into the cavity, so that the follow-up adjustment assembly has an unlocked state in which it slides along the annular groove in a second direction, and the first direction and the second direction are opposite.

7. The continuously variable transmission according to claim 6, characterized in that The cavity has a radial opening toward the base; a first side and a second side disposed opposite to each other along the circumference of the base, and a guide slope connected between the first side and the second side; the guide slope and the opening are disposed opposite to each other along the radial direction; the locking member contacts the guide slope and can slide along the guide slope; Furthermore, along the circumference of the base, from the first side to the second side, the size of the cavity is gradually expanded by the guide slope; wherein, along the circumference, the direction from the second side to the first side is the first direction; The follow-up adjustment assembly further includes a second elastic member, which is used to provide an elastic force that causes the locking member to abut against the first side and the annular groove.

8. The continuously variable transmission according to claim 6, characterized in that The first main body is provided with two cavities along the circumferential direction, and the follow-up adjustment component includes locking members corresponding to the cavities one by one.

9. The continuously variable transmission according to claim 6, characterized in that The first body has at least one first sliding guide surface protruding radially from the base, and the second body has at least one second sliding guide surface protruding radially from the base; the annular groove is provided with a first annular surface corresponding to the first sliding guide surface, and a second annular surface corresponding to the second sliding guide surface.

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

Images