Continuously variable transmission, drive and bicycle

Abstract

A continuously variable transmission device comprises: a wheel disc assembly comprising a first mounting shaft, a first wheel disc rotatably mounted on the first mounting shaft, and a second wheel disc fixedly mounted on the first mounting shaft in a circumferential direction, the first wheel disc and the second wheel disc are respectively provided with a plurality of first track grooves and a plurality of second track grooves arranged in the circumferential direction, the first track grooves and the second track grooves are both close to the first mounting shaft at one end and away from the first mounting shaft at the other end, and the center lines of the first track grooves and the second track grooves do not coincide; a first transmission wheel assembly comprising a plurality of first transmission wheels and a plurality of second mounting shafts, the plurality of second mounting shafts, the plurality of first track grooves and the plurality of second track grooves are in one-to-one correspondence, the second mounting shafts pass through the corresponding first track grooves and second track grooves, the plurality of first transmission wheels are respectively and one-to-one correspondingly mounted on the plurality of second mounting shafts, and the plurality of first transmission wheels can be transmissionally matched with a second transmission wheel through a transmission belt; and a driving device for driving the first wheel disc to rotate relative to the second wheel disc.

Description

TECHNICAL FIELD

[0001] The present application relates to, but is not limited to, the technical field of mechanical transmission, and in particular to, but is not limited to, a continuously variable transmission device, a transmission device and a bicycle. BACKGROUND

[0002] Variable speed bicycles are usually manually variable speed and multi-stage variable speed. SUMMARY

[0004] The following is a summary of subject matter of the detailed description herein. This summary is not intended to limit the scope of the claims.

[0005] A continuously variable transmission device comprises:

[0006] A wheel disc assembly comprises a first mounting shaft, a first wheel disc rotatably mounted on the first mounting shaft, and a second wheel disc fixedly mounted on the first mounting shaft in a circumferential direction, the first wheel disc is rotatably mounted on the first mounting shaft, and the second wheel disc is fixedly mounted on the first mounting shaft in the circumferential direction, the first wheel disc is provided with a plurality of first track grooves arranged in the circumferential direction, and the second wheel disc is provided with a plurality of second track grooves arranged in the circumferential direction, each of the first track grooves and the second track grooves has one end close to the first mounting shaft and the other end away from the first mounting shaft;

[0007] A first transmission wheel assembly comprises a plurality of first transmission wheels and a plurality of second mounting shafts, the plurality of second mounting shafts, the plurality of first track grooves and the plurality of second track grooves are in one-to-one correspondence, the second mounting shafts pass through the corresponding first track grooves and second track grooves, and the plurality of first transmission wheels are respectively and one-to-one correspondingly mounted on the plurality of second mounting shafts, and the plurality of first transmission wheels are arranged to be in transmission cooperation with a second transmission wheel through a transmission belt; and

[0008] A driving device is arranged to drive the first wheel disc to rotate relative to the second wheel disc;

[0009] The first transmission wheel is arranged to move along the second track groove towards a side close to or away from the first mounting shaft when the first wheel disc rotates relative to the second wheel disc.

[0010] A transmission mechanism comprises the continuously variable transmission device, the transmission belt and the second transmission wheel, and the plurality of first transmission wheels and the second transmission wheel of the continuously variable transmission device are in transmission connection through the transmission belt.

[0011] A bicycle comprises the transmission mechanism.

[0012] Other aspects can become apparent from a review of the drawings and a reading of the detailed description of the embodiments of the application.

[0013] SUMMARY OF DRAWINGS

[0014] The accompanying drawings are included to provide a further understanding of the technical scheme of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical scheme of the present application, and do not constitute a limitation on the technical scheme of the present application.

[0015] Figure 1 Structure schematic diagram of the continuously variable transmission device according to the embodiments of the present application;

[0016] Figure 2 Exploded structure schematic diagram of the continuously variable transmission device according to the embodiments of the present application;

[0017] Figure 3 Partial sectional structure schematic diagram of the continuously variable transmission device according to the embodiments of the present application;

[0018] Figure 4 Structure schematic diagram of the first pulley of the continuously variable transmission device according to the embodiments of the present application;

[0019] Figure 5 Structure schematic diagram of the second pulley of the continuously variable transmission device according to the embodiments of the present application;

[0020] Figure 6 Structure schematic diagram of the third pulley of the continuously variable transmission device according to the embodiments of the present application;

[0021] Figure 7 Structure schematic diagram of the control assembly of the continuously variable transmission device according to the embodiments of the present application Figure 1 ;

[0022] Figure 8 Structure schematic diagram of the control assembly of the continuously variable transmission device according to the embodiments of the present application after the gland is removed;

[0023] Figure 9 Structure schematic diagram of the control assembly of the continuously variable transmission device according to the embodiments of the present application Figure 2 ;

[0024] Figure 10 Structure schematic diagram of the first transmission member of the continuously variable transmission device according to the embodiments of the present application;

[0025] Figure 11 Partial structure schematic diagram of the first transmission member of the continuously variable transmission device according to the embodiments of the present application;

[0026] Figure 12 Structure schematic diagram of the transmission device according to the embodiments of the present application.

[0027] Illustration:

[0028] 100-wheel assembly, 101-first wheel, 102-second wheel, 103-third wheel, 104-first mounting shaft, 105-first rail slot, 106-second rail slot, 107-third rail slot, 108-mounting plate, 109-connection sleeve, 110-end shaft sleeve, 111-bearing seat, 112-five-way, 113-first fixing hole, 114-arc-shaped hole, 115-second fixing hole, 116-supporting shaft sleeve, 117-elastic member fixing sleeve, 118-third fixing hole,

[0029] 200-first transmission wheel assembly, 201-first transmission wheel, 202-second mounting shaft, 203-one-way bearing, 204-stress side, 205-non-stress side, 206-gear, 207-flange bearing,

[0030] 300-elastic member,

[0031] 400-non-return mechanism, 401-mounting seat, 402-ratchet wheel, 403-non-return pawl, 404-non-return pawl elastic member, 405-non-return pawl push piece, 406-non-return pawl push piece elastic member, 407-cam, 408-pressing cover, 409-first rotating shaft, 410-guiding groove, 411-protruding part,

[0032] 500-locking mechanism, 501-locking pawl, 502-locking pawl elastic member, 503-locking pawl push piece, 504-locking pawl push piece elastic member, 505-locking control element, 506-driving part, 507-second rotating shaft,

[0033] 600-bearing, 700-screw, 800-transmission belt, 900-second transmission wheel.

[0034] Detailed description

[0035] The embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other as long as there is no conflict.

[0036] In the following description, many embodiments are set forth in order to fully understand the embodiments of the present application, however, the embodiments of the present application can also be implemented in other ways different from those described herein, and therefore, the protection scope of the embodiments of the present application is not limited by the implementation manner disclosed below.

[0037] As shown in the drawings, the embodiments of the present application provide a continuously variable transmission device, which can be used in a bicycle, and of course, can also be applied to other mechanical devices for continuously variable speed adjustment. Figures 1-11

[0038] As shown in the drawings, the embodiments of the present application provide a continuously variable transmission device, which can be used in a bicycle, and of course, can also be applied to other mechanical devices for continuously variable speed adjustment. Figures 1-5 ​As shown, the continuously variable transmission (CVT) may include a wheel assembly 100, a first transmission wheel assembly 200, and a drive unit.

[0039] The wheel assembly 100 may include a first wheel 101, a second wheel 102, and a first mounting shaft 104. The first wheel 101 is rotatably mounted on the first mounting shaft 104, and the second wheel 102 is circumferentially fixedly mounted on the first mounting shaft 104. The first wheel 101 is provided with a plurality of first rail grooves 105 arranged circumferentially, and the second wheel 102 is provided with a plurality of second rail grooves 106 arranged circumferentially. Both the first rail grooves 105 and the second rail grooves 106 have one end close to the first mounting shaft 104 and the other end away from the first mounting shaft 104, and the center lines of the first rail grooves 105 and the second rail grooves 106 do not coincide.

[0040] like Figures 3-5 As shown, both the first disc 101 and the second disc 102 are fitted onto the first mounting shaft 104, and the first mounting shaft 104 is provided with a mounting plate 108. The first disc 101 has an arc-shaped hole 114, and the second disc 102 has a second fixing hole 115. A screw 700 passes through the mounting plate 108, the arc-shaped hole 114 on the first disc 101, and the second fixing hole 115 on the second disc 102 to circumferentially fix the second disc 102 to the first mounting shaft 104. The screw 700 can slide within the arc-shaped hole 114, allowing the first disc 101 to rotate relative to the first mounting shaft 104. A support sleeve 116 can be fitted over the screw 700, and the support sleeve 116 passes through the arc-shaped hole 114 on the first disc 101, so that the first mounting shaft 104 is connected and fixed to the second disc 102 through the screw 700 and the support sleeve 116.

[0041] like Figure 4 As shown, the plurality of first grooves 105 on the first wheel 101 can be evenly distributed along the circumference, and the shape and size of the plurality of first grooves 105 can be the same. Figure 5 As shown, the plurality of second rail grooves 106 on the second wheel 102 can be evenly distributed along the circumference, and the shape and size of the plurality of second rail grooves 106 can be the same. Figure 1 As shown, the first groove 105 on the first wheel 101 and the second groove 106 on the second wheel 102 both have one end close to the first mounting shaft 104 and the other end away from the first mounting shaft 104. That is, the first groove 105 and the second groove 106 both have a component along the radial direction of the wheel assembly 100 (the radial directions of the first mounting shaft 104, the first wheel 101 and the second wheel 102 are the same), but the centerline of the first groove 105 (e.g., ...) Figure 4 (as shown by the dashed line) and the center line of the second track groove 106 (as shown by the dashed line) Figure 5 (shown by the dashed line) do not overlap, such that at least one of the first rail groove 105 and the second rail groove 106 has a component along the circumferential direction of the wheel assembly 100.

[0042] As shown in Figures 1-3 , the first transmission wheel assembly 200 can include a plurality of first transmission wheels 201 and a plurality of second mounting shafts 202, the plurality of second mounting shafts 202, the plurality of first rail slots 105 and the plurality of second rail slots 106 are one-to-one corresponding, the second mounting shaft 202 passes through the corresponding first rail slot 105 and the second rail slot 106, and the plurality of first transmission wheels 201 are respectively one-to-one corresponding mounted on the plurality of second mounting shafts 202. As shown in Figure 12 , the plurality of first transmission wheels 201 are arranged to be in transmission cooperation with the second transmission wheel 900 through the transmission belt 800.

[0043] In the first transmission wheel assembly 200, the shapes and sizes of the plurality of first transmission wheels 201 can be the same, and the shapes and sizes of the plurality of second mounting shafts 202 can be the same. Each second mounting shaft 202 passes through a first rail slot 105 and a second rail slot 106 corresponding to each other, and each second mounting shaft 202 has a first transmission wheel 201 mounted thereon. The plurality of first transmission wheels 201 are arranged to be in transmission cooperation with the second transmission wheel 900 through the transmission belt 800, so that the first transmission wheel 201 drives the second transmission wheel 900 to rotate through the transmission belt 800.

[0044] The driving device is arranged to drive the first wheel disc 101 to rotate relative to the second wheel disc 102. The first transmission wheel 201 is arranged to move along the second rail slot 106 towards or away from the side of the first mounting shaft 104 when the first wheel disc 101 rotates relative to the second wheel disc 102.

[0045] In some exemplary embodiments, the driving device includes an elastic member 300, one end of which can be connected with the first mounting shaft 104 and the other end of which can be connected with the first wheel disc 101. As shown in Figure 3 , the elastic member 300 can be a torsion spring, the outer side of the first mounting shaft 104 is sleeved with an elastic member fixing sleeve 117, the elastic member fixing sleeve 117 is fixed circumferentially with the first mounting shaft 104 to achieve rigid connection, and one end of the torsion spring is fixedly connected with the elastic member fixing sleeve 117. The elastic member 300 can exert a spring force on the first wheel disc 101 to make the first wheel disc 101 rotate relative to the second wheel disc 102.

[0046] The transmission belt 800 and the elastic member 300 are arranged to exert a force to make the first wheel disc 101 rotate towards opposite directions, so that under the action of the transmission belt 800 and the elastic member 300, the first wheel disc 101 is arranged to rotate bidirectionally (i.e. can rotate towards two opposite directions) relative to the second wheel disc 102, and the first transmission wheel 201 is arranged to move along the second rail slot 106 towards or away from the side of the first mounting shaft 104.

[0047] When no external force is applied, under the action of the elastic element 300, the plurality of first transmission wheels 201 of the first transmission wheel assembly 200 are respectively distributed on the side of the first rail groove 105 and the second rail groove 106 away from the first mounting shaft 104. At this time, the diameter D of the circle formed by the outer contour surface enclosing the plurality of first transmission wheels 201 (i.e., the equivalent diameter of the first transmission wheel assembly 200, such as...) Figure 12 (As shown) Maximum. When a force is applied to the first mounting shaft 104, causing the first mounting shaft 104 to align in the first direction (e.g.) Figure 1 When the continuously variable transmission (CVT) rotates in the forward direction (counterclockwise), it drives the transmission belt 800 to rotate. When the reaction force of the transmission belt 800 on the first transmission pulley 201 is greater than the force of the elastic element 300, the multiple first transmission pulleys 201 retract inward, driving the first disc 101 to rotate (along the counterclockwise direction). Figure 1 The clockwise rotation of the first drive wheel assembly 201 reduces its effective diameter. The greater the reaction force of the drive belt 800 on the first drive wheel 201, the smaller the effective diameter of the first drive wheel assembly 200. When the applied external force (the reaction force of the drive belt 800 on the first drive wheel 201) is removed, under the action of the elastic element 300, the first wheel 101 rotates (clockwise). Figure 1 (When rotated counterclockwise), the equivalent diameter of the first transmission wheel assembly 200 returns to its maximum. The size of the equivalent diameter of the first transmission wheel assembly 200 is determined by the balance between the applied external force and the elastic force of the elastic element 300. The change in the equivalent diameter of the first transmission wheel assembly 200 causes a change in the transmission ratio between the first transmission wheel 201 and the second transmission wheel 900, thereby achieving speed change.

[0048] It should be understood that the continuously variable transmission (CVT) can also be configured such that, when there is no external force, under the action of the elastic element 300, the multiple first transmission wheels 201 of the first transmission wheel assembly 200 are respectively distributed on the side of the first track groove 105 and the second track groove 106 near the first mounting shaft 104. At this time, the equivalent diameter of the first transmission wheel assembly 200 is the smallest. When the first mounting shaft 104 rotates in the forward direction and drives the transmission belt 800 to rotate, and the reaction force of the transmission belt 800 on the first transmission wheel 201 is greater than the force of the elastic element 300, the multiple first transmission wheels 201 expand outward, making the equivalent diameter of the first transmission wheel assembly 200 larger.

[0049] This continuously variable transmission device can not only achieve stepless speed change, but also achieve automatic speed change based on the reaction force of the transmission belt 800.

[0050] In some other exemplary embodiments, the drive device is connected to the first wheel 101 and configured to drive the first wheel 101 to rotate bidirectionally relative to the second wheel 102, so that the first drive wheel 201 can move along the second track 106 toward the side closer to or away from the first mounting shaft 104.

[0051] The driving device can be an automatic driving device, such as can include a motor, or can include a motor and a transmission mechanism, the motor can directly drive the first wheel disc 101 to rotate, or the motor drives the first wheel disc 101 to rotate through the transmission mechanism. The first wheel disc 101 rotates, so that the first transmission wheel 201 can move along the second track groove 106, thereby changing the size of the equivalent diameter of the first transmission wheel assembly 200, realizing speed regulation.

[0052] Alternatively, the driving device can be a manual driving device, such as can include a speed regulation control knob and a transmission mechanism, the speed regulation control knob and the first wheel disc 101 are connected through the transmission mechanism, by manually adjusting the speed regulation control knob, the first wheel disc 101 can be driven to rotate. The first wheel disc 101 rotates, so that the first transmission wheel 201 can move along the second track groove 106, thereby changing the size of the equivalent diameter of the first transmission wheel assembly 200, realizing speed regulation.

[0053] In some example embodiments, as shown in Figure 3 The first transmission wheel assembly 200 can further include a plurality of gears 206, the plurality of gears 206 are respectively and one by one arranged in the plurality of second track grooves 106, and a gear tooth is arranged on one side groove wall of the second track groove 106, the gear tooth cooperates with the gear 206, and the gear 206 is installed on the second installation shaft 202.

[0054] The first transmission wheel assembly 200 further includes a gear 206, a gear tooth is arranged on one side groove wall of the second track groove 106, the gear 206 can be located in the second track groove 106 and cooperate with the gear tooth, forming a gear 206 rack cooperation form, so that when the plurality of first transmission wheels 201 expand outward or contract inward, the gear 206 can rotate and translate along the gear tooth edge of the second track groove 106.

[0055] In some example embodiments, as shown in Figure 4 The first track groove 105 can be a curved track groove with a curved center line (such as Figure 4 The center line of the first track groove 105 can be a logarithmic spiral curve satisfying r=a*e^(k*θ).

[0056] Wherein, a, k are constants, r is the polar radius (the pole O is a point on the rotation axis of the first installation shaft 104), θ is the polar angle (the polar axis can be arbitrarily rotated, the polar axis is different, the value range of θ is different), e is the base of natural logarithm (the value is about 2.718).

[0057] The center line of the first track groove 105 is arranged as a logarithmic spiral curve satisfying r=a*e^(k*θ), so that the elastic force exerted by the elastic member 300 (torsional spring) changes uniformly with the change of the rotation angle of the first installation shaft 104, avoiding the elastic force exerted by the elastic member 300 to be large and small, so that when the stepless speed change device is applied to a bicycle, the riding force exerted by a person changes uniformly.

[0058] In some example embodiments, as shown in Figure 5 the second track groove 106 can be a straight track groove with a center line (as shown by the dashed line in the middle) being a straight line, and the center line of the second track groove 106 can extend along the radial direction of the second wheel disc 102. Figure 5

[0059] The center line of the second track groove 106 is a straight line extending along the radial direction of the second wheel disc 102, so that the second track groove 106 is simple to process. The straight track groove and the curved track groove can be matched to realize the expansion or contraction of the plurality of transmission wheels along the radial direction outward or inward, so that the equivalent diameter of the first transmission wheel assembly 200 changes, thereby realizing the speed change.

[0060] It should be understood that the structures of the first track groove 105 and the second track groove 106 are not limited to the curved track groove and the straight track groove, and can also be other forms, as long as the first track groove 105 and the second track groove 106 both have a component along the radial direction of the wheel disc assembly 100, and at least one of the first track groove 105 and the second track groove 106 has a component along the circumferential direction of the wheel disc assembly 100. The first track groove 105 can be a straight track groove or a curved track groove, and the second track groove 106 can be a straight track groove or a curved track groove.

[0061] In some example embodiments, as shown in Figure 1 , Figure 3 , Figure 5 and Figure 6 The wheel disc assembly 100 can further include a third wheel disc 103, which is fixedly installed on the first mounting shaft 104 in the circumferential direction, and the third wheel disc 103 is provided with a plurality of third track grooves 107 arranged in the circumferential direction, the plurality of third track grooves 107 correspond one-to-one to the plurality of second track grooves 106, and the center line of the third track groove 107 coincides with the center line of the corresponding second track groove 106, and the second mounting shaft 202 passes through the third track groove 107.

[0062] The wheel disc assembly 100 can further include a third wheel disc 103, which is fixedly installed on the first mounting shaft 104 in the circumferential direction, and the third wheel disc 103 is provided with a plurality of third track grooves 107 arranged in the circumferential direction, the plurality of third track grooves 107 correspond one-to-one to the plurality of second track grooves 106, and the center line of the third track groove 107 coincides with the center line of the corresponding second track groove 106, and the second mounting shaft 202 passes through the third track groove 107.

[0063] ​The second mounting shaft 202 also passes through the third rail slot 107. Since the center line of the third rail slot 107 coincides with the center line of the corresponding second rail slot 106, the third rail slot 107 does not further limit the movement of the second mounting shaft 202, but the third rail slot 107 and the second rail slot 106 cooperate to better guide the movement of the second mounting shaft 202, so that the outward expansion or inward contraction movement of the plurality of first transmission wheels 201 is smoother.

[0064] In some example embodiments, as shown in Figure 3 and Figure 6 The third wheel disc 103 is provided with a third fixing hole 118, and a screw 700 passes through the third fixing hole 118 of the third wheel disc 103 to pass through the arc-shaped hole 114 on the first wheel disc 101 and the second fixing hole 115 on the second wheel disc 102, so as to circumferentially fix the third wheel disc 103, the second wheel disc 102 and the first mounting shaft 104, realizing rigid connection.

[0065] In some example embodiments, as shown in Figure 2 and Figure 3 The first wheel disc 101, the second wheel disc 102 and the third wheel disc 103 are each provided with two, the two second wheel discs 102 are located between the two third wheel discs 103, the two first wheel discs 101 are located between the two second wheel discs 102, and the first transmission wheel 201 is located between the two first wheel discs 101. The second mounting shaft 202 is provided with two bearings 600, and the two bearings 600 can move in the first rail slot 105 of the two first wheel discs 101 respectively. The two ends of the second mounting shaft 202 are provided with flange bearings 207, and the flange bearings 207 at the two ends can move in the third rail slot 107 of the two third wheel discs 103 respectively. The flange bearings 207 at the two ends of the second mounting shaft 202 can be fastened by the screw 700.

[0066] The first transmission wheel 201 is located in the middle, and the first transmission wheel 201 is sequentially provided with the first wheel disc 101, the second wheel disc 102 and the third wheel disc 103 on each side. The second mounting shaft 202 passes through the first wheel disc 101, the second wheel disc 102, the third wheel disc 103 and the first transmission wheel 201, and is supported by the first rail slot 105, the second rail slot 106 and the third rail slot 107 on both sides, so that the second mounting shaft 202 is stably supported, and the first transmission wheel 201 is stably mounted. The second mounting shaft 202 and the first transmission wheel 201 thereon can move under the joint action of the first rail slot 105, the second rail slot 106, the third rail slot 107 and the transmission belt 800.

[0067] In some example embodiments, as shown in Figure 3As shown, the second mounting shaft 202 is provided with a one-way bearing 203 between the corresponding first transmission wheel 201. The one-way bearing 203 is sleeved outside the second mounting shaft 202, and the first transmission wheel 201 is sleeved outside the one-way bearing 203.

[0068] The one-way bearing 203 is a bearing 600 that can rotate freely in one direction and is locked in the other direction. The one-way bearing 203 is arranged to be in a locked state when the first mounting shaft 104 rotates towards the first direction, at which time the second mounting shaft 202, the one-way bearing 203 and the first transmission wheel 201 are circumferentially fixed, so that the first transmission wheel 201 can be driven by the second transmission wheel 900 through the transmission belt 800, and the transmission belt 800 can exert a reverse force on the first transmission wheel 201; when the first mounting shaft 104 rotates towards the direction opposite to the first direction, the one-way bearing 203 can rotate freely, at which time the first transmission wheel 201 can rotate relative to the second mounting shaft 202, so that the first transmission wheel 201 cannot exert a force (or the force is very small) on the transmission belt 800, and thus cannot drive the second transmission wheel 900 through the transmission belt 800, resulting in a decrease in the reverse force exerted by the transmission belt 800 on the first transmission wheel 201.

[0069] The first transmission wheel 201 is arranged to move under the action of the transmission belt 800 and the elastic member 300 when the first mounting shaft 104 rotates towards the first direction, such as moving towards the side close to the first mounting shaft 104, so that the equivalent diameter of the first transmission wheel assembly 200 becomes smaller; the first transmission wheel 201 is also arranged to move under the action of the elastic member 300 when the first mounting shaft 104 rotates towards the direction opposite to the first direction, such as moving away from the first mounting shaft 104, so that the equivalent diameter of the first transmission wheel assembly 200 becomes larger.

[0070] When the continuously variable transmission device is applied to a bicycle, the one-way bearing 203 allows the first transmission wheel 201 to drive the second transmission wheel 900 to move through the transmission belt 800 when the first mounting shaft 104 rotates in the first direction, so that the bicycle moves forward; when the first mounting shaft 104 reverses, the first transmission wheel 201 does not drive the second transmission wheel 900 to move, so that the bicycle does not move backward.

[0071] In some exemplary embodiments, as shown, Figure 3 As shown, the continuously variable transmission device further includes a check mechanism 400 arranged to lock and fix the first disc 101 and the second disc 102 when the first mounting shaft 104 stops rotating towards the first direction, so that the first transmission wheel 201 remains in place.

[0072] When the continuously variable transmission is applied to a bicycle, the bicycle moves forward when the first mounting shaft 104 rotates in the first direction; when the first mounting shaft 104 stops rotating in the first direction, the reaction force applied by the transmission belt 800 to the first transmission wheel 201 decreases and is less than the elastic force of the elastic member 300, but the check mechanism 400 locks and fixes the first disc 101 and the second disc 102 to prevent the first disc 101 and the second disc 102 from rotating relative to each other, so that the first transmission wheel 201 moves away from the first mounting shaft 104 and remains in place, thereby keeping the equivalent diameter of the first transmission wheel assembly 200 unchanged and keeping the transmission ratio unchanged.

[0073] In some example embodiments, as shown in Figures 7-9 The check mechanism 400 can include a mounting seat 401, a ratchet wheel 402, a check pawl 403, a check pawl elastic member 404, a check pawl tab 405, a check pawl tab elastic member 406, and a cam 407.

[0074] The mounting seat 401 is fixedly installed on the first mounting shaft 104 in the circumferential direction and provides a mounting base for the check pawl 403 and the check pawl tab 405. As shown in Figure 3 The mounting seat 401 is a plate structure and is sleeved on the first mounting shaft 104, and the screw 700 passes through the mounting seat 401 and circumferentially fixes the mounting seat 401, the second disc 102, the third disc 103, and the first mounting shaft 104.

[0075] The ratchet wheel 402 is rotatably installed on the first mounting shaft 104 and is circumferentially fixedly connected with the first disc 101. As shown in Figure 3 The ratchet wheel 402 is sleeved on the first mounting shaft 104, the outer side of the ratchet wheel 402 is sleeved with the connecting sleeve 109, and the ratchet wheel 402 is circumferentially fixed with the connecting sleeve 109 to achieve rigid connection. The connecting sleeve 109 is located between the two first discs 101 and is fixed with the two first discs 101 (as shown in Figure 4 The first disc 101 is provided with a first fixing hole 113, and the first disc 101 can be fixed with the connecting sleeve 109 by the screw 700 to achieve rigid connection). The elastic member 300 can be fixedly connected with the ratchet wheel 402 to apply elastic force to the first disc 101 through the ratchet wheel 402 and the connecting sleeve 109. The second disc 102 and the third disc 103 can be installed on the ratchet wheel 402 through the bearing 600, and the part of the ratchet wheel 402 provided with the teeth is located on the outer side of the third disc 103 to cooperate with the check pawl 403.

[0076] The check pawl 403 is rotatably installed on the mounting seat 401. AsFigure 7 As shown in

[0077] As shown in Figure 7 and Figure 8 As shown in Figure 9 As shown in

[0078] One end of the backstop pawl spring 404 is connected with the mounting base 401, and the other end is connected with the backstop pawl 403. As shown in Figures 7-9 The backstop pawl spring 404 can be a spring. The backstop pawl spring 404 can apply a spring force to the backstop pawl 403, so that the backstop pawl 403 is engaged with the teeth of the ratchet wheel 402 under the spring force of the backstop pawl spring 404.

[0079] The backstop pawl tab 405 is rotatably mounted on the mounting base 401. As shown in Figure 7 The first rotating shaft 409 rotatably connects the backstop pawl 403 with the mounting base 401, and / or the first rotating shaft 409 rotatably connects the backstop pawl tab 405 with the mounting base 401. It should be understood that the first rotating shaft can be realized by the screw 700 passing through the mounting plate 108, the arc-shaped hole 114 on the first disc 101, the second fixed hole 115 on the second disc 102, the third fixed hole 118 on the third disc 103, and the mounting base 401.

[0080] As shown in Figure 9 The backstop pawl tab 405 can be rotated to contact the backstop pawl 403 and drive the backstop pawl 403 to rotate, so that the backstop pawl 403 is disengaged from the teeth of the ratchet wheel 402; as shown in Figure 7 and Figure 8 The backstop pawl tab 405 can also be rotated to be separated from the backstop pawl 403, so that the backstop pawl 403 is automatically reset to be engaged with the teeth of the ratchet wheel 402 under the spring force of the backstop pawl spring 404.

[0081] One end of the backstop pawl tab spring 406 is connected with the mounting base 401, and the other end is connected with the backstop pawl tab 405. As shown inFigure 7 As shown, the elastic member 406 of the check pawl pusher can be a spring. The elastic member 406 of the check pawl pusher can exert a spring force on the check pawl pusher 405, so that the check pawl pusher 405 is separated from the check pawl 403 under the spring force of the elastic member 406 of the check pawl pusher, so that the check pawl 403 is automatically kept engaged with the teeth of the ratchet wheel 402 under the spring force of the elastic member 404 of the check pawl.

[0082] As shown, the cam 407 is fixedly arranged, and the profile of the cam 407 includes a protrusion 411 arranged to push the check pawl pusher 405. Figures 7-9 The cam 407 is fixedly arranged, and the cam 407 can be mounted at a position that does not rotate relative to the continuously variable transmission. As shown, when the continuously variable transmission is applied to a bicycle, the cam 407 can be fixed on the five-way tube 112.

[0083] Figure 3 As shown, the profile of the cam 407 includes a protrusion 411, and when the first mounting shaft 104 rotates and drives the mounting base 401 and the check pawl pusher 405 thereon to move synchronously, the check pawl pusher 405 can contact the protrusion 411 and rotate around the first rotating shaft 409 under the action of the protrusion 411. When the first mounting shaft 104 rotates towards the first direction (counterclockwise in the figure), the mounting base 401 and the check pawl pusher 405 thereon also move synchronously in the counterclockwise direction, and the check pawl pusher 405 can rotate away from the check pawl 403 under the action of the protrusion 411, so that the check pawl pusher 405 is separated from the check pawl 403 and does not push the check pawl 403, so that the check pawl 403 is engaged with the teeth of the ratchet wheel 402.

[0084] As shown, the profile of the cam 407 includes a protrusion 411, and when the first mounting shaft 104 rotates and drives the mounting base 401 and the check pawl pusher 405 thereon to move synchronously, the check pawl pusher 405 can contact the protrusion 411 and rotate around the first rotating shaft 409 under the action of the protrusion 411. When the first mounting shaft 104 rotates towards the first direction (counterclockwise in the figure), the mounting base 401 and the check pawl pusher 405 thereon also move synchronously in the counterclockwise direction, and the check pawl pusher 405 can rotate away from the check pawl 403 under the action of the protrusion 411, so that the check pawl pusher 405 is separated from the check pawl 403 and does not push the check pawl 403, so that the check pawl 403 is engaged with the teeth of the ratchet wheel 402. Figures 7-9 Figure 1 As shown, the profile of the cam 407 includes a protrusion 411, and when the first mounting shaft 104 rotates and drives the mounting base 401 and the check pawl pusher 405 thereon to move synchronously, the check pawl pusher 405 can contact the protrusion 411 and rotate around the first rotating shaft 409 under the action of the protrusion 411. When the first mounting shaft 104 rotates towards the first direction (counterclockwise in the figure), the mounting base 401 and the check pawl pusher 405 thereon also move synchronously in the counterclockwise direction, and the check pawl pusher 405 can rotate away from the check pawl 403 under the action of the protrusion 411, so that the check pawl pusher 405 is separated from the check pawl 403 and does not push the check pawl 403, so that the check pawl 403 is engaged with the teeth of the ratchet wheel 402. Figure 7 Figure 8 As shown, the profile of the cam 407 includes a protrusion 411, and when the first mounting shaft 104 rotates and drives the mounting base 401 and the check pawl pusher 405 thereon to move synchronously, the check pawl pusher 405 can contact the protrusion 411 and rotate around the first rotating shaft 409 under the action of the protrusion 411. When the first mounting shaft 104 rotates towards the first direction (counterclockwise in the figure), the mounting base 401 and the check pawl pusher 405 thereon also move synchronously in the counterclockwise direction, and the check pawl pusher 405 can rotate away from the check pawl 403 under the action of the protrusion 411, so that the check pawl pusher 405 is separated from the check pawl 403 and does not push the check pawl 403, so that the check pawl 403 is engaged with the teeth of the ratchet wheel 402. Figure 1 Figure 7 As shown, the profile of the cam 407 includes a protrusion 411, and when the first mounting shaft 104 rotates and drives the mounting base 401 and the check pawl pusher 405 thereon to move synchronously, the check pawl pusher 405 can contact the protrusion 411 and rotate around the first rotating shaft 409 under the action of the protrusion 411. When the first mounting shaft 104 rotates towards the first direction (counterclockwise in the figure), the mounting base 401 and the check pawl pusher 405 thereon also move synchronously in the counterclockwise direction, and the check pawl pusher 405 can rotate away from the check pawl 403 under the action of the protrusion 411, so that the check pawl pusher 405 is separated from the check pawl 403 and does not push the check pawl 403, so that the check pawl 403 is engaged with the teeth of the ratchet wheel 402. Figure 8 Figure 9 As shown, the profile of the cam 407 includes a protrusion 411, and when the first mounting shaft 104 rotates and drives the mounting base 401 and the check pawl pusher 405 thereon to move synchronously, the check pawl pusher 405 can contact the protrusion 411 and rotate around the first rotating shaft 409 under the action of the protrusion 411. When the first mounting shaft 104 rotates towards the first direction (counterclockwise in the figure), the mounting base 401 and the check pawl pusher 405 thereon also move synchronously in the counterclockwise direction, and the check pawl pusher 405 can rotate away from the check pawl 403 under the action of the protrusion 411, so that the check pawl pusher 405 is separated from the check pawl 403 and does not push the check pawl 403, so that the check pawl 403 is engaged with the teeth of the ratchet wheel 402.

[0085] ​​​​​The check mechanism 400, the check pawl 403 is arranged to be engaged with the gear teeth of the ratchet wheel 402 under the elastic force of the check pawl spring 404, so as to allow the first disc 101 to rotate relative to the second disc 102 when the first mounting shaft 104 rotates towards the first direction, and to prevent the first disc 101 from rotating relative to the second disc 102 when the first mounting shaft 104 stops rotating towards the first direction.

[0086] When the check pawl 403 is engaged with the gear teeth of the ratchet wheel 402, the ratchet wheel 402 can rotate in one direction, but is prevented from rotating in the opposite direction. Under the elastic force of the check pawl spring 404, when the first mounting shaft 104 rotates in the forward direction, the first disc 101 rotates relative to the second disc 102 (in the opposite direction of the first mounting shaft 104), and drives the ratchet wheel 402 to rotate, at this time the check pawl 403 allows the ratchet wheel 402 to rotate, so as to realize the speed change of the continuously variable speed device; and when the first mounting shaft 104 stops rotating towards the first direction, the check pawl 403 prevents the ratchet wheel 402 from rotating in the opposite direction, thereby preventing the first disc 101 from rotating in the opposite direction relative to the second disc 102, so that the continuously variable speed device remains in the previous speed change state.

[0087] In the check mechanism 400, the check pawl 403 is arranged to be separated from the check pawl 403 under the action of the check pawl spring 406 when the first mounting shaft 104 rotates towards the first direction; the check pawl 405 is also arranged to act under the action of the cam 407 when the first mounting shaft 104 rotates towards the direction opposite to the first direction, and to push the check pawl 403, so that the check pawl 403 is separated from the gear teeth of the ratchet wheel 402.

[0088] When the first mounting shaft 104 rotates in the forward direction, the mounting seat 401 and the check pawl 405 thereon move synchronously, under the action of the protruding portion 411, the check pawl 405 rotates away from the check pawl 403, the check pawl 405 does not push the check pawl 403, and the check pawl 403 automatically maintains the state of being engaged with the gear teeth of the ratchet wheel 402 under the action of the check pawl spring 404, so as to allow the continuously variable speed device to change speed when the first mounting shaft 104 rotates in the forward direction.

[0089] When the first mounting shaft 104 stops rotating towards the first direction, the check pawl 403 maintains the state of being engaged with the gear teeth of the ratchet wheel 402, so as to prevent the ratchet wheel 402 from rotating in the opposite direction, and thereby prevent the first disc 101 from rotating in the opposite direction relative to the second disc 102, so that the continuously variable speed device remains in the previous speed change state.

[0090] When the first mounting shaft 104 reverses (rotates towards a direction opposite to the first direction), the mounting seat 401 and the backstop pawl push piece 405 thereon move synchronously, under the action of the protruding part 411, the backstop pawl push piece 405 rotates towards the side close to the backstop pawl 403, the backstop pawl push piece 405 pushes the backstop pawl 403, so that the backstop pawl 403 is separated from the gear teeth of the ratchet wheel 402, the backstop mechanism 400 does not prevent the first disc 101 from rotating relative to the second disc 102, and the continuously variable speed device can be shifted. Since the one-way bearing 203 is arranged between the second mounting shaft 202 and the first transmission wheel 201, under the action of the elastic member 300, the first disc 101 rotates relative to the second disc 102, so that the equivalent diameter of the first transmission wheel assembly 200 returns to the maximum.

[0091] In some example embodiments, as shown in Figures 7-9 the continuously variable speed device further comprises a locking mechanism 500, the locking mechanism 500 is arranged to lock and fix the first disc 101 and the second disc 102, so that the first disc 101 and the second disc 102 are fixed in the circumferential direction, and the locking mechanism 500 is arranged to unlock the first disc 101 and the second disc 102, so that the first disc 101 can rotate relative to the second disc 102.

[0092] The locking mechanism 500 has a locked state (as shown in Figure 7 and Figure 8 ) and an unlocked state (as shown in Figure 9 ). As shown in Figure 7 and Figure 8 , the locking mechanism 500 in the locked state can lock and fix the first disc 101 and the second disc 102, so that the first disc 101 and the second disc 102 are fixed in the circumferential direction and cannot rotate relative to each other, that is, the continuously variable speed device cannot be shifted; as shown in Figure 9 , the locking mechanism 500 in the unlocked state can also unlock the first disc 101 and the second disc 102, so that the first disc 101 can rotate relative to the second disc 102, so as to shift the continuously variable speed device.

[0093] In some example embodiments, the locking mechanism 500 is a one-way locking mechanism, and the one-way locking mechanism 500 is arranged to lock and fix the first disc 101 and the second disc 102 only when the first mounting shaft 104 rotates towards the first direction.

[0094] The one-way locking mechanism 500 has a one-way locking function, i.e. has a locking function in one direction and has no locking function in the opposite direction. When the first mounting shaft 104 rotates towards the first direction, the one-way locking mechanism 500 can lock and fix the first disc 101 and the second disc 102, so that the first disc 101 and the second disc 102 are fixed in the circumferential direction; when the first mounting shaft 104 rotates towards the opposite direction opposite to the first direction, the one-way locking mechanism 500 does not lock and fix the first disc 101 and the second disc 102, so that the first disc 101 can rotate relative to the second disc 102. When the one-way locking mechanism 500 is in the locking state, the continuously variable speed device has no speed changing function when the first mounting shaft 104 rotates towards the first direction, and has the speed changing function when the first mounting shaft 104 rotates towards the opposite direction opposite to the first direction.

[0095] In some other exemplary embodiments, the locking mechanism 500 is a two-way locking mechanism, and the two-way locking mechanism 500 is arranged to lock and fix the first disc 101 and the second disc 102 when the first mounting shaft 104 rotates towards the first direction and rotates towards the opposite direction opposite to the first direction.

[0096] The two-way locking mechanism 500 has a two-way locking function, i.e. has a locking function in two opposite directions. When the first mounting shaft 104 rotates towards the first direction, the two-way locking mechanism 500 can lock and fix the first disc 101 and the second disc 102, and when the first mounting shaft 104 rotates towards the opposite direction opposite to the first direction, the two-way locking mechanism 500 can also lock and fix the first disc 101 and the second disc 102, so that the continuously variable speed device has no speed changing function when the two-way locking mechanism 500 is in the locking state.

[0097] In some exemplary embodiments, as shown in Figures 7-9 The locking mechanism 500 includes a locking pawl 501, a locking pawl elastic member 502, a locking pawl push piece 503, a locking pawl push piece elastic member 504, and a locking control element 505.

[0098] The locking pawl 501 is rotatably mounted on the mounting seat 401. As shown in Figure 7 The locking pawl 501 is rotatably mounted on the mounting seat 401 through a second rotating shaft 507.

[0099] As shown in Figure 7 and Figure 8As shown, the locking pawl 501 can rotate to engage with the teeth of the ratchet 402. At this time, the locking mechanism 500 is in a locked state, which prevents the ratchet 402 from rotating relative to the mounting base 401, thereby preventing the first wheel 101 from rotating relative to the second wheel 102, thus preventing the first transmission wheel 201 from displacing. This keeps the equivalent diameter of the first transmission wheel assembly 200 unchanged, preventing the continuously variable transmission from changing speed. Figure 9 As shown, the locking pawl 501 can also rotate to separate from the teeth of the ratchet 402. At this time, the locking mechanism 500 is in the unlocked state, so that the first wheel 101 can rotate relative to the second wheel 102, so that the continuously variable transmission can change speed.

[0100] One end of the locking pawl elastic element 502 is connected to the mounting base 401, and the other end is connected to the locking pawl 501. For example... Figure 7 As shown, the locking pawl elastic element 502 can be a spring. The locking pawl elastic element 502 can apply a spring force to the locking pawl 501, so that the locking pawl 501 engages with the teeth of the ratchet 402 under the action of the spring force of the locking pawl elastic element 502.

[0101] The locking pawl 503 is rotatably mounted on the mounting base 401. For example... Figure 7 As shown, the locking pawl 503 is rotatably mounted on the mounting base 401 via the second pivot 507.

[0102] like Figure 9 As shown, the locking pawl pawl 503 can rotate to contact the locking pawl 501 and drive the check pawl 403 to rotate, causing the locking pawl to separate from the teeth of the ratchet 402; as Figure 7 and Figure 8 As shown, the locking pawl 503 can also be rotated to separate from the locking pawl 501, so that the locking pawl 501 can automatically reset to mesh with the teeth of the ratchet 402 under the elastic force of the locking pawl elastic element 502.

[0103] One end of the locking pawl lever elastic element 504 is connected to the mounting base 401, and the other end is connected to the locking pawl lever 503. For example... Figure 7 As shown, the locking pawl lever elastic element 504 can be a spring. The locking pawl lever elastic element 504 can apply a spring force to the locking pawl lever 503, so that the locking pawl lever 503 is separated from the locking pawl 501 under the spring force of the locking pawl lever elastic element 504, so that the locking pawl 501 automatically maintains engagement with the teeth of the ratchet 402 under the spring force of the locking pawl lever elastic element 502.

[0104] The locking control element 505 is movably mounted on the mounting base 401, and the locking control element 505 is configured to drive the locking pawl 503 to move. Figures 7-9The locking control element 505 is a locking sleeve, which is sleeved outside the mounting seat 401. The inner wall surface of the locking control element 505 is provided with a protruding driving part 506, which is used to push the locking pawl push piece 503. The mounting seat 401 can be provided with a guide groove 410, and the driving part 506 can slide in the guide groove 410 to guide the rotation of the locking control element 505.

[0105] When the locking control element 505 rotates (for example, rotates in the counterclockwise direction of Figures 7-9 ), the driving part 506 can move with it and drive the locking pawl push piece 503 to rotate around the second rotating shaft 507. The locking pawl push piece 503 can contact the check pawl 403 and push the locking pawl 501, so that the locking pawl 501 is separated from the gear teeth of the ratchet wheel 402 (for example, as shown in Figure 9 When the locking control element 505 reversely rotates (for example, rotates in the clockwise direction of Figures 7-9 ), the locking pawl push piece 503 can reversely rotate around the second rotating shaft 507 under the action of the locking pawl push piece elastic member 504. The locking pawl push piece 503 can be separated from the check pawl 403, so that the locking pawl 501 is automatically reset to engage with the gear teeth of the ratchet wheel 402 (for example, as shown in Figure 7 and Figure 8 ).

[0106] The outer circumferential surface of the locking control element 505 can be provided with a driving block (for example, a friction block), which can be connected with a locking control knob arranged at the handlebar of the bicycle. The movement of the locking control element 505 can be controlled through the locking control knob.

[0107] In the locking mechanism 500, the locking pawl 501 is arranged to engage with the gear teeth of the ratchet wheel 402 under the elastic force of the locking pawl elastic member 502, so as to prevent the ratchet wheel 402 from rotating and lock the first disc 101 and the second disc 102.

[0108] The locking pawl 501 engages with the gear teeth of the ratchet wheel 402 to realize the one-way locking function, that is, the locking mechanism 500 is a one-way locking mechanism. As shown in Figure 7 and Figure 8 When the locking pawl 501 engages with the gear teeth of the ratchet wheel 402, when the first mounting shaft 104 rotates in the first direction, the locking mechanism 500 can lock the first disc 101 and the second disc 102, so that the continuously variable speed device cannot change speed. When the first mounting shaft 104 rotates in the direction opposite to the first direction, the one-way locking mechanism 500 does not have the locking function, and the check pawl push piece 405 pushes the check pawl 403 under the action of the cam 407 (for example, as shown in Figure 9When the lock mechanism 500 is in the locked state, the lock pawl 501 is engaged with the teeth of the ratchet wheel 402, and the lock pawl 403 is disengaged from the teeth of the ratchet wheel 402. At this time, the first wheel plate 101 can rotate relative to the second wheel plate 102, so that the continuously variable speed device can change speed.

[0109] In the lock mechanism 500, the lock pawl 501 is disengaged from the lock pawl 503 under the elastic force of the lock pawl elastic member 502. The lock pawl 501 is engaged with the teeth of the ratchet wheel 402 under the elastic force of the lock pawl elastic member 502. At this time, the lock mechanism 500 is in the locked state.

[0110] As shown in FIG. 4, the lock pawl 501 is disengaged from the lock pawl 503 under the elastic force of the lock pawl elastic member 502. The lock pawl 501 is engaged with the teeth of the ratchet wheel 402 under the elastic force of the lock pawl elastic member 502. At this time, the lock mechanism 500 is in the locked state. Figure 7 and Figure 8 As shown in FIG. 4, the lock pawl 501 is disengaged from the lock pawl 503 under the elastic force of the lock pawl elastic member 502. The lock pawl 501 is engaged with the teeth of the ratchet wheel 402 under the elastic force of the lock pawl elastic member 502. At this time, the lock mechanism 500 is in the locked state.

[0111] As shown in FIG. 4, the lock pawl 501 is disengaged from the lock pawl 503 under the elastic force of the lock pawl elastic member 502. The lock pawl 501 is engaged with the teeth of the ratchet wheel 402 under the elastic force of the lock pawl elastic member 502. At this time, the lock mechanism 500 is in the locked state. Figure 9 As shown in FIG. 4, the lock pawl 501 is disengaged from the lock pawl 503 under the elastic force of the lock pawl elastic member 502. The lock pawl 501 is engaged with the teeth of the ratchet wheel 402 under the elastic force of the lock pawl elastic member 502. At this time, the lock mechanism 500 is in the locked state.

[0112] It should be understood that in the above embodiment, the lock mechanism 500 is a one-way lock mechanism. When the one-way lock mechanism is in the locked state, the continuously variable speed device can only change speed when the first mounting shaft 104 rotates in the first direction. When the first mounting shaft 104 rotates in the direction opposite to the first direction, the continuously variable speed device can change speed. Of course, the lock mechanism 500 can also be a two-way lock mechanism. When the two-way lock mechanism 500 is in the locked state, the continuously variable speed device cannot change speed when the first mounting shaft 104 rotates in the first direction or in the direction opposite to the first direction.

[0113] Figures 7-9In the shown embodiment, the check mechanism 400 shares the mounting base 401 and the ratchet wheel 402 with the lock mechanism 500, which can simplify the structure of the continuously variable transmission, and reduce the weight and cost of the continuously variable transmission. Of course, the lock mechanism 500 can also not share the mounting base 401 and the ratchet wheel 402 with the check mechanism 400, but separately provide a mounting base and a ratchet wheel, at which time the lock mechanism 500 can be flexibly provided as a one-way lock mechanism or a two-way lock mechanism.

[0114] The check mechanism 400 and the lock mechanism 500 constitute a control assembly that controls whether the continuously variable transmission can be shifted and maintains the shift state. As shown in Figure 3 、 Figure 7 and Figure 9 , the control assembly further includes a cover 408 that is provided at an end away from the mounting base 401 and can be fixed with the mounting base 401 through a screw 700. The cover 408 can shield the ratchet wheel 402, the check pawl 403, the check pawl elastic member 404, the check pawl tab 405, the check pawl tab elastic member 406, the lock pawl 501, the lock pawl elastic member 502, the lock pawl tab 503, the lock pawl tab elastic member 504, etc., to enhance the aesthetic appearance. The portion of the cam 407 that is provided with the protrusion 411 is located between the cover 408 and the mounting base 401, so as to cooperate with the check pawl tab 405; the end of the cam 407 extends out of the cover 408, so as to be fixed with the five-way tube 112 of the bicycle, which can be connected with the end shaft sleeve 110 fixed on the first mounting shaft 104 through a bearing 600 and a bearing seat 111.

[0115] In some exemplary embodiments, as shown in Figure 1 , the first transmission wheel 201 is a chain wheel, i.e., the continuously variable transmission is a chain transmission continuously variable transmission. Correspondingly, the second transmission wheel 900 is also a chain wheel, and the transmission belt 800 that cooperates with the chain wheel is a chain.

[0116] In some exemplary embodiments, as shown in Figure 10 and Figure 11 , the teeth of the first transmission wheel 201 include a force-receiving side 204 located at the force-receiving side and a non-force-receiving side 205 located at the non-force-receiving side, and the width W1 of the force-receiving side 204 along the circumferential direction of the first transmission wheel 201 is less than the width W2 of the non-force-receiving side 205 along the circumferential direction of the first transmission wheel 201.

[0117] W1 is less than W2, so that the teeth as a whole are asymmetrically structured and are inclined toward the force-receiving side. Compared with a chain wheel with symmetrically structured teeth, the chain wheel (first transmission wheel 201) of the embodiment of the application is more likely to achieve meshing cooperation with the chain, and improves the stability of transmission.

[0118] In some exemplary embodiments, as shown in Figure 10 andFigure 11 As shown, the force-receiving side 204 is a standard tooth shape, and the non-force-receiving side 205 is an arc surface. The standard tooth shape of the force-receiving side intersects with the arc surface of the non-force-receiving side to form an intersection line.

[0119] The one-way bearing 203 is arranged between the second mounting shaft 202 and the first transmission wheel 201, so that the teeth of the chain wheel (first transmission wheel 201) are on one side of the force-receiving side and on the other side of the non-force-receiving side. Among them, the force-receiving side 204 of one side of the tooth is a standard tooth shape, so as to cooperate with the chain to drive; the non-force-receiving side 205 of the other side of the tooth is an arc surface, and intersects with the standard tooth shape of the force-receiving side to form an intersection line, which is beneficial to realize W1 less than W2.

[0120] In some embodiments, the first transmission wheel assembly 200 includes at least three first transmission wheels 201 and at least three second mounting shafts 202. As shown, Figure 1 The number of first transmission wheels 201 and second mounting shafts 202 can be eight, of course, the number of first transmission wheels 201 and second mounting shafts 202 can also be five, six, seven, nine, ten, and other values. As shown, Figure 1 , Figures 4-6 As shown, the number of first tracks 105 on the first disc 101, the number of second tracks 106 on the second disc 102, and the number of third tracks 107 on the third disc 103 are arranged in opposite to the number of first transmission wheels 201, and the first tracks 105, the second tracks 106 and the third tracks 107 are uniformly distributed along the circumference.

[0121] The continuously variable transmission device of the embodiment of the application can be divided into three parts: the disc assembly 100, the first transmission wheel assembly 200 and the control assembly. When the first mounting shaft 104 is positively rotated in the first direction by applying an external force, the first transmission wheel 201 drives the transmission belt 800 to rotate, and in turn drives the second transmission wheel 900 to rotate. When the reaction force of the transmission belt 800 is greater than the elastic force of the elastic member 300, the plurality of first transmission wheels 201 contract inward, the equivalent diameter of the first transmission wheel assembly 200 becomes smaller, the force applied to the transmission belt 800 increases, the torque increases, and the speed change purpose is achieved.

[0122] The non-return mechanism 400 of the control assembly can keep the continuously variable transmission device in the speed change state and prevent it from rotating backward. When the first mounting shaft 104 is positively rotated, the locking mechanism 500 is switched to the locked state by applying a force, so that the continuously variable transmission device is locked, and the equivalent diameter of the first transmission wheel assembly 200 remains unchanged. When the first mounting shaft 104 is reversely rotated by applying an external force, the non-return pawl 403 can be released from the non-return state by the non-return pawl 403. The equivalent diameter of the first transmission wheel assembly 200 returns to the maximum. When the first mounting shaft 104 is reversely rotated, the locking mechanism 500 is switched to the unlocked state by applying a force, so that the continuously variable transmission device is unlocked, and the continuously variable transmission device can be speed-changed.

[0123] The embodiment of the present application provides a transmission mechanism, which comprises the continuously variable transmission device of any of the above-mentioned embodiments, a transmission belt 800 and a second transmission wheel 900, and the plurality of first transmission wheels 201 and the second transmission wheel 900 of the continuously variable transmission device are transmissionally connected through the transmission belt 800. Figure 12

[0124] The embodiment of the present application provides a bicycle, which comprises the transmission mechanism described above. The bicycle comprising the continuously variable transmission device described above can realize stepless and automatic gear shifting.

[0125] In some exemplary embodiments, the first mounting shaft 104 of the continuously variable transmission device is connected to the pedal through a crankshaft. Of course, the continuously variable transmission device can also be installed at the rear wheel of the bicycle.

[0126] It should be understood that the transmission mechanism of the embodiment of the present application can be applied to other devices for transmission in addition to the bicycle.

[0127] In the description in the present application, it should be noted that the directions or position relationships indicated by "upper", "lower", "one end", "one side" and the like are the directions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated structure has a particular direction, is constructed and operated in a particular direction, and therefore cannot be understood as a limitation on the present application.

[0128] In the description of the embodiment of the present application, unless otherwise explicitly specified and limited, the terms "connection", "assembly", "mounting" should be understood in a broad sense, for example, the term "connection" can be fixed connection, or detachable connection, or integral connection; can be direct connection, or indirect connection through an intermediate medium, or internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0129] The embodiments described in the present application are exemplary rather than limiting, and it is obvious to those skilled in the art that there can be more embodiments and implementation schemes within the scope of the embodiments described in the present application. Although many possible combinations of features are shown in the drawings and discussed in the specific embodiments, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment can be used in combination with any other feature or element of any other embodiment, or can replace any other feature or element of any other embodiment.

[0130] ​This application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed herein can also be combined with any conventional feature or element to form a unique technology within the scope of the claims. Any feature or element of any embodiment can also be combined with features or elements from other technology solutions to form another unique technology solution within the scope of the claims. Thus, it will be understood that any of the features shown and / or discussed in this application can be implemented alone or in any appropriate combination. Accordingly, the embodiments are not to be restricted, except as by the appended claims and their equivalents. Additionally, various modifications and changes can be made within the scope of the following claims.

Claims

1. A continuously variable transmission device, comprising: a wheel disc assembly, comprising a first mounting shaft, a first wheel disc rotatably mounted on the first mounting shaft, and a second wheel disc fixedly mounted on the first mounting shaft in a circumferential direction, the first wheel disc being provided with a plurality of first tracks arranged in the circumferential direction, the second wheel disc being provided with a plurality of second tracks arranged in the circumferential direction, the first tracks and the second tracks each having one end close to the first mounting shaft and the other end away from the first mounting shaft, and the center lines of the first tracks and the second tracks not coinciding with each other; a first transmission wheel assembly, comprising a plurality of first transmission wheels and a plurality of second mounting shafts, the plurality of second mounting shafts, the plurality of first tracks and the plurality of second tracks corresponding to each other one by one, the second mounting shafts penetrating through the corresponding first tracks and second tracks, and the plurality of first transmission wheels being installed on the plurality of second mounting shafts one by one and arranged to be in transmission cooperation with a second transmission wheel through a transmission belt; a driving device arranged to drive the first wheel disc to rotate relative to the second wheel disc; the first transmission wheel being arranged to move along the second tracks towards a side close to or away from the first mounting shaft when the first wheel disc rotates relative to the second wheel disc; the driving device being connected with the first wheel disc and arranged to drive the first wheel disc to rotate relative to the second wheel disc in two directions, so that the first transmission wheel can move along the second tracks towards a side close to or away from the first mounting shaft; the driving device being an automatic driving device; the wheel disc assembly further comprising a third wheel disc fixedly mounted on the first mounting shaft in the circumferential direction, the third wheel disc being provided with a plurality of third tracks arranged in the circumferential direction, the plurality of third tracks corresponding to the plurality of second tracks one by one, and the center lines of the third tracks coinciding with the center lines of the corresponding second tracks, the second mounting shafts penetrating through the third tracks. the driving device comprising an elastic member, one end of the elastic member being connected with the first mounting shaft and the other end being connected with the first wheel disc; 2. The continuously variable transmission of claim 1 wherein, the transmission belt and the elastic member being arranged to exert a force to drive the first wheel disc to rotate in opposite directions, under the action of the transmission belt and the elastic member, the first wheel disc being arranged to rotate relative to the second wheel disc in two directions, and the first transmission wheel being arranged to move along the second tracks towards a side close to or away from the first mounting shaft. the first transmission wheel assembly further comprising a plurality of gears, the plurality of gears being arranged in the second tracks one by one, and one side of the second tracks being provided with a gear tooth cooperating with the gears, the gears being installed on the second mounting shafts.

3. The continuously variable transmission of claim 1 wherein, the first tracks being curved tracks with curved center lines, the center lines of the first tracks being logarithmic spiral curves satisfying r=a*e^ (k*θ), wherein a and k are constants, r is a polar radius, θ is a polar angle, and e is a base of a natural logarithm.

4. The continuously variable transmission of claim 1 wherein, the second tracks being straight tracks with straight center lines, the center lines of the second tracks extending in a radial direction of the second wheel disc.

5. The continuously variable transmission of claim 1, wherein, ​ 6. The continuously variable transmission of claim 1, wherein, The first pulley, the second pulley and the third pulley are provided in pairs, two second pulleys are located between two third pulleys, and two first pulleys are located between two second pulleys.

7. The continuously variable transmission of any one of claims 1 to 6, wherein, A one-way bearing is arranged between the second mounting shaft and the corresponding first transmission pulley, and the one-way bearing is arranged in a locked state when the first mounting shaft rotates in a first direction.

8. The continuously variable transmission device according to claim 7, further comprising a non-return mechanism arranged to lock and fix the first pulley and the second pulley when the first mounting shaft stops rotating in the first direction, so that the first transmission pulley remains in place.

9. The continuously variable transmission of claim 8 wherein, The non-return mechanism comprises: a mounting seat fixedly mounted on the first mounting shaft in a circumferential direction; a ratchet wheel rotatably mounted on the first mounting shaft and fixedly connected with the first pulley in a circumferential direction; a non-return pawl rotatably mounted on the mounting seat; a non-return pawl elastic member having one end connected with the mounting seat and the other end connected with the non-return pawl; a non-return pawl tab rotatably mounted on the mounting seat; a non-return pawl tab elastic member having one end connected with the mounting seat and the other end connected with the non-return pawl tab; and a cam fixedly arranged, and a profile of the cam comprises a protrusion arranged to actuate the non-return pawl tab; The non-return pawl is arranged to engage with the teeth of the ratchet wheel under the elastic force of the non-return pawl elastic member, so as to allow the first pulley to rotate relative to the second pulley when the first mounting shaft rotates in the first direction, and to prevent the first pulley from rotating relative to the second pulley when the first mounting shaft stops rotating in the first direction; The non-return pawl tab is arranged to be separated from the non-return pawl under the action of the non-return pawl tab elastic member when the first mounting shaft rotates in the first direction, and the non-return pawl tab is further arranged to act under the action of the cam and actuate the non-return pawl to separate the non-return pawl from the teeth of the ratchet wheel when the first mounting shaft rotates in a direction opposite to the first direction.

10. The continuously variable transmission device according to claim 7, further comprising a locking mechanism arranged to lock and fix the first pulley and the second pulley, so that the first pulley and the second pulley are fixed in a circumferential direction, and the locking mechanism is further arranged to unlock the first pulley and the second pulley, so that the first pulley can rotate relative to the second pulley.

11. The continuously variable transmission of claim 10 wherein, The locking mechanism is a one-way locking mechanism arranged to lock and fix the first pulley and the second pulley only when the first mounting shaft rotates in the first direction; Alternatively, the locking mechanism is a two-way locking mechanism arranged to lock and fix the first pulley and the second pulley when the first mounting shaft rotates in the first direction and in a reverse direction opposite to the first direction.

12. The continuously variable transmission of claim 10 wherein, The locking mechanism comprises: a mounting base, fixedly mounted on the first mounting shaft in a circumferential direction; a ratchet wheel, rotatably mounted on the first mounting shaft and fixedly connected with the first pulley in a circumferential direction; a locking pawl, rotatably mounted on the mounting base; a locking pawl spring, one end of which is connected with the mounting base and the other end of which is connected with the locking pawl; a locking pawl pusher, rotatably mounted on the mounting base; a locking pawl pusher spring, one end of which is connected with the mounting base and the other end of which is connected with the locking pawl pusher; and a locking control element, movably mounted on the mounting base, the locking control element being arranged to drive the locking pawl pusher to move; the locking pawl is arranged to engage with the teeth of the ratchet wheel under the elastic force of the locking pawl spring, so as to prevent the ratchet wheel from rotating and lock the first pulley and the second pulley; the locking pawl pusher is arranged to be separated from the locking pawl under the elastic force of the locking pawl pusher spring, and the locking pawl pusher is further arranged to act under the action of the locking control element to push the locking pawl, so as to separate the locking pawl from the teeth of the ratchet wheel.

13. The continuously variable transmission of claim 7 wherein, the first transmission wheel is a sprocket, the teeth of the first transmission wheel include a force-receiving side surface on a force-receiving side and a non-force-receiving side surface on a non-force-receiving side, and the width of the force-receiving side surface along the circumferential direction of the first transmission wheel is less than the width of the non-force-receiving side surface along the circumferential direction of the first transmission wheel.

14. The continuously variable transmission of claim 13 wherein, the force-receiving side surface is a standard tooth profile, the non-force-receiving side surface is an arc surface, and an intersection line is formed between the force-receiving side surface and the non-force-receiving side surface.

15. A transmission mechanism comprising the continuously variable transmission device of any one of claims 1 to 14, a transmission belt, and a second transmission wheel, the plurality of first transmission wheels and the second transmission wheel of the continuously variable transmission device being drivingly connected by the transmission belt.

16. A bicycle comprising the transmission mechanism of claim 15.

17. The bicycle of claim 16, wherein, the first mounting shaft of the continuously variable transmission device is connected to a pedal crank by a crankshaft.

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