Continuously variable transmission for non-motor vehicle and non-motor vehicle

By using a single adjusting motor and spiral mechanism in the bicycle transmission system, the pulley transmission ratio is accurately adjusted, and the problems of inaccurate transmission ratio and insufficient space are solved, achieving a compact and reliable continuously variable transmission design.

CN120332419APending Publication Date: 2025-07-18SCHAEFFLER TECHNOLOGIES AG & CO KG
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Patent Information

Application Number
CN202410067420.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-01-16
Publication Date
2025-07-18

AI Technical Summary

Technical Problem

The transmission ratio of the existing bicycle transmission system is inaccurate and difficult to meet the requirements of space miniaturization. The transmission belt is prone to deviating when the load changes, causing the transmission ratio to deviate from the predetermined value. The number of shaft systems and chain transmission mechanisms is large, and the layout is not compact.

Method used

A single adjustment motor is connected to the movable conical disc through the first and second spiral mechanisms to accurately adjust the transmission ratio between the first and second pulleys, reduce the number of shaft systems, and ensure the accuracy and stability of the transmission ratio adjustment using the self-locking screw-connected rotary and linear elements.

Benefits of technology

It realizes that the continuously variable transmission has a compact structure and accurate transmission ratio, which reduces the risk of damage to the transmission belt, improves the reliability and energy efficiency of the transmission, and is suitable for a variety of usage scenarios.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides a continuously variable transmission for a non-motor vehicle and the non-motor vehicle. The continuously variable transmission includes a first pulley, a second pulley, and a single adjustment motor. The first belt wheel comprises a first fixed cone disc and a first movable cone disc. The second belt wheel comprises a second fixed cone disc and a second movable cone disc. The adjusting motor is connected to the first movable conical disc through a first screw mechanism, so that the first movable conical disc can be driven by the adjusting motor to get close to and get away from the first fixed conical disc, and is connected to the second movable conical disc through a second screw mechanism; and the second movable conical disc can be driven by the adjusting motor to get close to and get away from the second fixed conical disc, so that the transmission ratio between the first belt wheel and the second belt wheel is changed. In this way, the continuously variable transmission can have the precise transmission ratio while being compact in structure.
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Description

Technical Field

[0001] The present application relates to the field of transmissions, and more particularly to a continuously variable transmission for non-motor vehicles and a non-motor vehicle. Background Art

[0002] Chinese Patent Application CN106627971A discloses a variable speed system for a bicycle and a variable speed method for an assisted bicycle including the system. The speed regulating assembly acts on the movable cone pulley of the driving cone pulley set, and the movable cone pulley of the driven cone pulley set is pre-tightened by an elastic member. The driving of the speed regulating assembly can change the position of the transmission belt, so as to achieve the purpose of compressing the elastic member or the reverse reset of the elastic member.

[0003] However, the above variable speed system has the problem of inaccurate transmission ratio. In situations such as climbing or crossing obstacles, the transmission belt will bear a large load. The movable cone pulley pre-tightened by the elastic member may shift axially, resulting in the transmission ratio deviating from the predetermined value set by the controller.

[0004] In addition, the above variable speed system is difficult to meet the requirement of space miniaturization of the mid-drive system of a bicycle. The variable speed system requires three main function shaft systems (crankshaft, driving cone pulley set, and driven cone pulley set) and two pairs of chain drive mechanisms (input sprocket set and output sprocket set) to achieve transmission. The large number of shaft systems and chain drive systems makes it difficult for the variable speed system to have a compact layout. Summary of the Invention

[0005] In view of the state of the above prior art, the present application is made. The purpose of the present application is to provide a continuously variable transmission for non-motor vehicles and a non-motor vehicle, which can overcome or mitigate at least one of the disadvantages described in the above background art.

[0006] To achieve the above purpose, the present application adopts the following technical solutions.

[0007] The present application provides a continuously variable transmission for non-motor vehicles as follows, including: a first pulley, which includes a first fixed cone disk and a first movable cone disk; a second pulley, which includes a second fixed cone disk and a second movable cone disk; and a single adjusting motor, which is connected to the first movable cone disk via a first screw mechanism, such that the first movable cone disk can approach and move away from the first fixed cone disk under the drive of the adjusting motor, and is connected to the second movable cone disk via a second screw mechanism, such that the second movable cone disk can approach and move away from the second fixed cone disk under the drive of the adjusting motor, thereby changing the transmission ratio between the first pulley and the second pulley.

[0008] In an alternative embodiment, the first screw mechanism includes a rotary element and a linear element, the rotary element is screwed with the linear element, and the linear element is rotatably connected to the first movable conical disk.

[0009] In another alternative embodiment, the rotary element and the linear element are screwed together in a self-locking manner, so that the rotary element can drive the linear element to move linearly, and the linear element cannot drive the rotary element to rotate.

[0010] In another alternative embodiment, the first movable conical disk is configured to move away from the first fixed conical disk when the second movable conical disk approaches the second fixed conical disk, and to approach the first fixed conical disk when the second movable conical disk moves away from the second fixed conical disk.

[0011] In another alternative embodiment, it further includes: a first transmission element; and a second transmission element, wherein the adjustment motor is connected to the first screw mechanism via the first transmission element and is connected to the second screw mechanism via the second transmission element.

[0012] In another alternative embodiment, it further includes a third transmission element, the adjustment motor is connected to the first transmission element and the second transmission element via the third transmission element, the third transmission element is connected to the second transmission element via the first transmission element, or the third transmission element is respectively connected to the first transmission element and the second transmission element.

[0013] In another alternative embodiment, the rotation axis of the rotor of the adjustment motor is parallel to the rotation axis of the first transmission element, or the rotation axis of the rotor of the adjustment motor is orthogonal to the rotation axis of the first transmission element.

[0014] In another alternative embodiment, it further includes an assisting motor, and the assisting motor is connected to the second fixed conical disk via the first fixed conical disk.

[0015] In another alternative embodiment, it further includes a central shaft, the central shaft is connected to the second pulley via the first pulley, and the first pulley is sleeved on the central shaft.

[0016] The present application also provides a non-motor vehicle as follows, including the above-mentioned continuously variable transmission, wherein the non-motor vehicle is a bicycle.

[0017] By adopting the above technical solution, by providing an adjustment motor, a first screw mechanism and a second screw mechanism, a single adjustment motor can simultaneously and accurately adjust the positions of the first movable conical disk and the second movable conical disk, so that the continuously variable transmission can have an accurate transmission ratio while having a compact structure. Description of the Drawings

[0018] Figure 1 A schematic diagram showing a partial structure of a non - motor vehicle according to a first embodiment of the present application.

[0019] Figure 2 A schematic diagram showing a partial structure of a non - motor vehicle according to a second embodiment of the present application.

[0020] Figure 3 A schematic diagram showing a partial structure of a non - motor vehicle according to a third embodiment of the present application.

[0021] Figure 4 A schematic diagram showing a partial structure of a non - motor vehicle according to a fourth embodiment of the present application.

[0022] Figure 5 A schematic diagram showing an adjustment motor of a non - motor vehicle according to a fifth embodiment of the present application.

[0023] Figure 6 A schematic diagram showing an adjustment motor of a non - motor vehicle according to a sixth embodiment of the present application.

[0024] Figure 7 A schematic diagram showing an adjustment motor of a non - motor vehicle according to a seventh embodiment of the present application.

[0025] Figure 8 A schematic diagram showing an adjustment motor of a non - motor vehicle according to an eighth embodiment of the present application.

[0026] Figure 9 A schematic diagram showing an adjustment motor of a non - motor vehicle according to a ninth embodiment of the present application.

[0027] Description of the Reference Numerals

[0028] 1 Continuously Variable Transmission (CVT);

[0029] 11 Transmission Assembly; 111 Bottom Bracket; 112 Driving Pulley; 113 Transmission Belt; 114 Driven Pulley; 115 Chainring; 116 Fixed Cone Disc; 117 Movable Cone Disc; 118 Fixed Cone Disc; 119 Movable Cone Disc;

[0030] 12 Adjustment Assembly; 121 Adjustment Motor; 122 Rotary Element; 123 Linear Element; 124 Bearing; 125 Rotary Element; 126 Linear Element; 127 Bearing;

[0031] 13 Boosting Assembly; 131 Boosting Motor; 132 Reducer; 133 One - Way Clutch;

[0032] 2 Crank

[0033] 3 Pedal

[0034] Gears G1, G2, G3, G4, G5, G6, G7, G8, G9, G10, G11;

[0035] Shafts S1, S2, S3, S4;

[0036] Worm W. Detailed implementation manner

[0037] The exemplary embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, rather than to exhaust all feasible ways of the present application, nor to limit the scope of the present application.

[0038] In the present application, unless otherwise specified, "torsion-resistant connection" means a connection that can transmit torque, such as spline connection or integral molding, etc.

[0039] (First Embodiment)

[0040] Figure 1 A schematic diagram showing a partial structure of a non-motor vehicle, particularly a bicycle, according to a first embodiment of the present application is shown.

[0041] The non-motor vehicle may include a continuously variable transmission 1, a crank 2, and a pedal 3.

[0042] The continuously variable transmission 1 may include a transmission assembly 11 and an adjustment assembly 12.

[0043] The transmission assembly 11 may include a bottom bracket 111, a driving pulley 112 (an example of the first pulley or the second pulley), a transmission belt 113, a driven pulley 114 (an example of the second pulley or the first pulley), and a chainring 115. The transmission belt 113 may be supported on the driving pulley 112 and the driven pulley 114, so that the driving pulley 112, the transmission belt 113, and the driven pulley 114 form a belt drive mechanism. The driving pulley 112 may be torsion-resistant connected to the crank 2 via the bottom bracket 111, and the crank 2 may be rotatably connected to the pedal 3. The driven pulley 114 may be torsion-resistant connected to the chainring 115 via the gears G1, G2, the shaft S1, the gears G3, G4, and the shaft S2 in sequence. The gears G2 and G3 may be supported on the shaft S1, and the gears G4 and the chainring 115 may be supported on the shaft S2. The gears G1 and G2 may mesh with each other, and the gears G3 and G4 may mesh with each other. The driving pulley 112, the gear G4, the shaft S2, and the chainring 115 may be coaxially sleeved on the bottom bracket 111.

[0044] The driving pulley 112 may include a fixed cone disk 116 (an example of the first fixed cone disk or the second fixed cone disk) and a movable cone disk 117 (an example of the first movable cone disk or the second movable cone disk), and the driven pulley 114 may include a fixed cone disk 118 (an example of the second fixed cone disk or the first fixed cone disk) and a movable cone disk 119 (an example of the second movable cone disk or the first movable cone disk). The fixed cone disk 116 and the movable cone disk 117 may be arranged coaxially with their conical surfaces facing each other. The driving pulley 112 may be torsionally connected to the central shaft 111, and the movable cone disk 117 can axially move relative to the fixed cone disk 116. The fixed cone disk 118 and the movable cone disk 119 may be arranged coaxially with their conical surfaces facing each other. The driven pulley 114 may be torsionally connected to the gear G1, and the movable cone disk 119 can axially move relative to the fixed cone disk 118. The transmission belt 113 may be a V-belt, and the inclined sides of the transmission belt 113 may fit with the conical surfaces of the fixed cone disks 116, 118 and the movable cone disks 117, 119.

[0045] The adjusting element 12 may include an adjusting motor 121, a rotary element 122, a linear element 123, a bearing 124, a rotary element 125, a linear element 126 and a bearing 127.

[0046] The adjusting motor 121 may be sequentially connected to the movable cone disk 117 via a gear G5 (an example of the first transmission element or the second transmission element), a rotary element 122, a linear element 123 and a bearing 124. The adjusting motor 121 may be torsionally connected to the rotary element 122 via the gear G5. The rotary element 122 and the linear element 123 may form a screw mechanism (an example of the first screw mechanism or the second screw mechanism) and are screwed together in a self-locking manner. In other words, the rotary element 122 can drive the linear element 123, while the linear element 123 cannot drive the rotary element 122. The linear element 123 may be rotatably connected to the movable cone disk 117 via a bearing 127. For example, the bearing 124 may be a thrust bearing. The gear G5 may be supported on the rotary element 122, and the rotary element 122 may be coaxially sleeved on the central shaft 111.

[0047] The adjusting motor 121 can be connected to the movable cone disk 119 via the gear G6 (an example of the second transmission element or the first transmission element), the rotating shaft S3, the rotating element 125, the linear element 126, and the bearing 127 in sequence. The adjusting motor 121 can be torsionally connected to the rotating element 125 via the gears G5, G6, and the rotating shaft S3 in sequence. The rotating element 125 and the linear element 126 can form a screw mechanism (an example of the second screw mechanism or the first screw mechanism), and are screwed together in a self-locking manner. In other words, the rotating element 125 can drive the linear element 126, while the linear element 126 cannot drive the rotating element 125. The linear element 126 can be rotatably connected to the movable cone disk 119 via the bearing 127. For example, the bearing 127 can be a thrust bearing. The gear G6 and the rotating element 125 can be supported on the rotating shaft S3, and the driven pulley 114 can be coaxially sleeved on the rotating shaft S3.

[0048] The adjusting motor 121 can adjust the transmission ratio between the driving pulley 112 and the driven pulley 114. The adjusting motor 121 can drive the rotating element 122 to rotate, so that the linear element 123 moves along the axial direction of the rotating element 122 (the linear element 123 does not rotate), so that the movable cone disk 117 approaches and moves away from the fixed cone disk 116 along with the linear element 123. The adjusting motor 121 can drive the rotating element 125 to rotate, so that the linear element 126 moves along the axial direction of the rotating element 125 (the linear element 126 does not rotate), so that the movable cone disk 119 approaches and moves away from the fixed cone disk 118 along with the linear element 126. When the movable cone disk 117 approaches the fixed cone disk 116, the movable cone disk 119 can move away from the fixed cone disk 118 synchronously. Accordingly, the transmission belt 113 can radially move away from the rotation axis of the driving pulley 112 along the radial direction of the driving pulley 112, and radially approach the rotation axis of the driven pulley 114 along the radial direction of the driven pulley 114, so that the transmission ratio between the driving pulley 112 and the driven pulley 114 is reduced. When the movable cone disk 117 moves away from the fixed cone disk 116, the movable cone disk 119 can approach the fixed cone disk 118 synchronously. Accordingly, the transmission belt 113 can radially approach the rotation axis of the driving pulley 112 along the radial direction of the driving pulley 112, and radially move away from the rotation axis of the driven pulley 114 along the radial direction of the driven pulley 114, so that the transmission ratio between the driving pulley 112 and the driven pulley 114 is increased. In other words, the movable cone disk 117 and the movable cone disk 119 are always adjusted in a synchronous and opposite manner.

[0049] The continuously variable transmission for non-motor vehicles and the non-motor vehicle in this embodiment at least have the following advantages.

[0050] (i) By providing the adjusting motor 121 and two screw mechanisms, a single adjusting motor 121 can simultaneously and accurately adjust the positions of the movable cone disks 117 and 119, so that the continuously variable transmission 1 can have an accurate transmission ratio while having a compact structure.

[0051] (ii) By screwing the rotary elements 122, 125 and the linear elements 123, 126 together in a self-locking manner, the rotary elements 122, 125 can drive the linear elements 123, 126, while the linear elements 123, 126 will not drive the rotary elements 122, 125 in the reverse direction, so that the adjustment motor 121 can be turned on only when the transmission ratio needs to be adjusted and turned off when the transmission ratio does not need to be adjusted, thereby enabling the continuously variable transmission 1 to have lower energy consumption.

[0052] (iii) By adjusting the movable cone pulleys 117, 119 in a synchronous and opposite manner, the transmission belt 113 with a certain length will neither be overstretched by the driving pulley 112 and the driven pulley 114 nor separated from the driving pulley 112 and the driven pulley 114, making the transmission belt 113 not easily damaged and capable of stably transmitting torque, thereby enabling the continuously variable transmission 1 to have higher reliability.

[0053] (iv) By sleeving the driving pulley 112 on the central shaft, the continuously variable transmission can have a smaller number of shaft systems, enabling the continuously variable transmission to have a compact layout, which is conducive to the miniaturization of the continuously variable transmission.

[0054] (Second Embodiment)

[0055] The second embodiment is a variant of the first embodiment. For features that are the same as or similar to those of the first embodiment, the same reference numerals are used in this embodiment, and the detailed description of these features is omitted.

[0056] Referring to Figure 2 , in the second embodiment, the continuously variable transmission 1 may further include an assisting component 13.

[0057] The assisting component 13 may include an assisting motor 131, a speed reducer 132, and a one-way clutch 133. The assisting motor 131 may be connected to the central shaft 111 via the speed reducer 132 and the one-way clutch 133 in sequence. The rotor of the assisting motor 131 and the central shaft 111 may be coaxially arranged. For example, the rotor may be coaxially sleeved on the central shaft 111. The one-way clutch 133 may unidirectionally transmit the torque generated by the assisting motor 131 to the central shaft 111.

[0058] In this way, by providing the assisting motor 131, the assisting motor 131 can assist human power in scenarios such as going uphill, enabling the continuously variable transmission 1 to be applicable to a variety of different usage scenarios.

[0059] (Third Embodiment)

[0060] The third embodiment is a variant of the first embodiment. For features that are the same as or similar to those of the first embodiment, the same reference numerals are used in this embodiment, and the detailed description of these features is omitted.

[0061] Referring Figure 3 , in the third embodiment, the continuously variable transmission 1 may further include an assist component 13.

[0062] The assist component 13 may include an assist motor 131, a speed reducer 132, and a one-way clutch 133. The assist motor 131 may be connected to the central shaft 111 via the speed reducer 132 and the one-way clutch 133 in sequence. The rotor of the assist motor 131 and the central shaft 111 may be arranged in parallel and offset. The one-way clutch 133 may transmit the torque generated by the assist motor 131 to the central shaft 111 unidirectionally.

[0063] The speed reducer 132 may include a gear G7, a gear G8, a gear G9, a gear G10, and a rotating shaft S4. The gear G7 may be torsionally connected to the gear G10 via the gear G8, the rotating shaft S4, and the gear G9 in sequence. The gears G8 and G9 may be supported on the rotating shaft S4. The gear G7 and the gear G8 may mesh with each other, and the gear G9 and the gear G10 may mesh with each other. Torque may be input to the speed reducer 132 via the gear G7 and output from the speed reducer 132 via the gear G10.

[0064] (Fourth Embodiment)

[0065] The fourth embodiment is a variant of the first embodiment. For features that are the same as or similar to those of the first embodiment, the same reference numerals are used in this embodiment, and the detailed description of these features is omitted.

[0066] Referring Figure 4 , in the fourth embodiment, the continuously variable transmission 1 may further include an assist component 13.

[0067] The assist component 13 may include an assist motor 131, a speed reducer 132, and a one-way clutch 133. The assist motor 131 may be connected to the rotating shaft S1 via the speed reducer 132 and the one-way clutch 133 in sequence. The rotor of the assist motor 131 and the rotating shaft S1 may be arranged coaxially. For example, the rotor may be coaxially sleeved on the rotating shaft S1. The one-way clutch 133 may transmit the torque generated by the assist motor 131 to the rotating shaft S1 unidirectionally. Compared with the second and third embodiments, the difference in this example is that the assist motor 131 is connected to the rotating shaft S1 in a way that bypasses the belt drive mechanism (i.e., without passing through the driving pulley 112, the transmission belt 113, and the driven pulley 114). In this way, when the rotational speed of the rotating shaft S1 is configured to be greater than the rotational speed of the central shaft 111, the speed reducer 132 can have a smaller transmission ratio, enabling the speed reducer 132 to have a smaller volume and lower cost.

[0068] (Fifth Embodiment)

[0069] The fifth embodiment is a variant of the first embodiment. For features that are the same as or similar to those of the first embodiment, the same reference numerals are used in this embodiment, and the detailed description of these features is omitted.

[0070] Referring to Figure 5 , in the fifth embodiment, the adjusting assembly 12 may further include a gear G11 (an example of a third transmission element). The adjusting motor 121 may be torsionally connected to the gear G6 via the gear G11 and the gear G5 in sequence. The rotational axes of the rotor of the adjusting motor 121, the gear G5, the gear G6, and the gear G11 may be arranged parallel to each other. The gear G5 may mesh with the gear G6 and the gear G11, and the gear G6 and the gear G11 may be spaced apart from each other.

[0071] (Sixth Embodiment)

[0072] The sixth embodiment is a variant of the first embodiment. For features that are the same as or similar to those of the first embodiment, the same reference numerals are used in this embodiment, and the detailed description of these features is omitted.

[0073] Referring to Figure 6 , in the sixth embodiment, the adjusting assembly 12 may further include a gear G11 (an example of a third transmission element) and a worm W (an example of a third transmission element). The adjusting motor 121 may be torsionally connected to the gear G6 via the worm W, the gear G11, and the gear G5 in sequence. The rotational axis of the rotor of the adjusting motor 121 may be parallel to the rotational axis of the worm W and orthogonal to the rotational axes of the gear G5, the gear G6, and the gear G11. The gear G5 and the gear G11 may be arranged coaxially, for example, may be supported on the same rotating shaft. The gear G5 and the gear G6 may mesh with each other, and the gear G5 may be spaced apart from the gear G11 and the worm W. The gear G11 may be a worm gear and mesh with the worm W.

[0074] (Seventh Embodiment)

[0075] The seventh embodiment is a variant of the first embodiment. For features that are the same as or similar to those of the first embodiment, the same reference numerals are used in this embodiment, and the detailed description of these features is omitted.

[0076] Referring to Figure 7, in the seventh embodiment, the adjusting assembly 12 may further include a worm W (an example of a third transmission element). The adjusting motor 121 may be torsionally connected to the worm W, and the gears G5 and G6 may be torsionally connected to the worm W respectively. The rotational axis of the rotor of the adjusting motor 121 may be parallel to the rotational axis of the worm W and orthogonal to the rotational axes of the gears G5 and G6. The gears G5 and G6 may be worm wheels and mesh with the worm W. The central axes of the gears G5 and G6 may be parallel to each other. The gears G5 and G6 may be spaced apart from each other and arranged on the same radial side of the worm W.

[0077] (Eighth Embodiment)

[0078] The eighth embodiment is a variant of the first embodiment. For the features that are the same as or similar to those of the first embodiment, the same reference numerals are used in this embodiment, and the detailed description of these features is omitted.

[0079] Referring to Figure 8 , in the eighth embodiment, the adjusting assembly 12 may further include a worm W (an example of a third transmission element). The adjusting motor 121 may be torsionally connected to the worm W, and the gears G5 and G6 may be torsionally connected to the worm W respectively. The rotational axis of the rotor of the adjusting motor 121 may be parallel to the rotational axis of the worm W and orthogonal to the rotational axes of the gears G5 and G6. The gears G5 and G6 may be worm wheels and mesh with the worm W. The central axes of the gears G5 and G6 may be parallel to each other. The gears G5 and G6 may be spaced apart from each other and arranged on opposite radial sides of the worm W.

[0080] (Ninth Embodiment)

[0081] The ninth embodiment is a variant of the first embodiment. For the features that are the same as or similar to those of the first embodiment, the same reference numerals are used in this embodiment, and the detailed description of these features is omitted.

[0082] Referring to Figure 9 , in the ninth embodiment, the adjusting assembly 12 may further include a gear G11 (an example of a third transmission element). The adjusting motor 121 may be torsionally connected to the gear G11, and the gears G5 and G6 may be torsionally connected to the gear G11 respectively. The rotational axes of the rotor of the adjusting motor 121, the gears G5, G6, and G11 may be arranged parallel to each other. The gear G11 may mesh with the gears G5 and G6, and the gears G5 and G6 may be spaced apart from each other.

[0083] It should be understood that the above embodiments are merely exemplary and are not intended to limit the present application. Those skilled in the art can make various modifications and changes to the above embodiments under the teaching of the present application without departing from the scope of the present application.

[0084] (i) The non-motor vehicle is not limited to a bicycle, and can be, for example, a tricycle or a wheelchair, etc., and the bicycle can be an electric assist bicycle.

[0085] (ii) The continuously variable transmission can set a tensioning mechanism for tensioning the transmission belt according to the machining accuracy of the parts (such as gear G5, gear G6 and the screw mechanism) to eliminate the gap between the transmission belt and the driving pulley and the driven pulley.

[0086] (iii) In one example, the adjustment motor can be first connected to gear G6 and then connected to gear G5 via gear G6.

[0087] (iv) The transmission ratio of gear G1 to gear G2 is not limited to being less than 1, and can be, for example, greater than or equal to 1.

Claims

1. A continuously variable transmission for a non-motor vehicle, characterized in that, Comprising: A first pulley, which includes a first fixed cone disk and a first movable cone disk; A second pulley, which includes a second fixed cone disk and a second movable cone disk; And A single adjusting motor (121), which is connected to the first movable cone disk via a first screw mechanism, such that the first movable cone disk can approach and move away from the first fixed cone disk under the drive of the adjusting motor (121), and is connected to the second movable cone disk via a second screw mechanism, such that the second movable cone disk can approach and move away from the second fixed cone disk under the drive of the adjusting motor (121), thereby changing the transmission ratio between the first pulley and the second pulley.

2. The continuously variable transmission according to claim 1, characterized in that, The first screw mechanism includes rotary elements (122, 125) and linear elements (123, 126), the rotary elements (122, 125) are screwed with the linear elements (123, 126), and the linear elements (123, 126) are rotatably connected to the first movable cone disk.

3. The continuously variable transmission according to claim 2, wherein, The rotary elements (122, 125) and the linear elements (123, 126) are screwed together in a self-locking manner, such that the rotary elements (122, 125) can drive the linear elements (123, 126) to move linearly, and the linear elements (123, 126) cannot drive the rotary elements (122, 125) to rotate.

4. The continuously variable transmission according to any one of claims 1 to 3, characterized in that, The first movable cone disk is configured to move away from the first fixed cone disk when the second movable cone disk approaches the second fixed cone disk, and to approach the first fixed cone disk when the second movable cone disk moves away from the second fixed cone disk.

5. The continuously variable transmission according to any one of claims 1 to 3, characterized in that, Further comprising: A first transmission element; And A second transmission element, wherein The adjusting motor (121) is connected to the first screw mechanism via the first transmission element, and is connected to the second screw mechanism via the second transmission element.

6. The continuously variable transmission according to claim 5, characterized in that, Further comprising a third transmission element, the adjusting motor (121) is connected to the first transmission element and the second transmission element via the third transmission element, The third transmission element is connected to the second transmission element via the first transmission element, or the third transmission element is respectively connected to the first transmission element and the second transmission element.

7. The continuously variable transmission according to claim 5, characterized in that The rotation axis of the rotor of the adjusting motor (121) is parallel to the rotation axis of the first transmission element, or The rotation axis of the rotor of the adjusting motor (121) is orthogonal to the rotation axis of the first transmission element.

8. The continuously variable transmission according to any one of claims 1 to 3, characterized in that, Further comprising an assisting motor (131), the assisting motor (131) is connected to the second fixed cone disk via the first fixed cone disk.

9. The continuously variable transmission according to any one of claims 1 to 3, characterized in that, Further comprising a central shaft (111), the central shaft (111) is connected to the second pulley via the first pulley, and the first pulley is sleeved on the central shaft (111).

10. A non-motor vehicle, characterized in that, Comprising the continuously variable transmission according to any one of claims 1 to 9, wherein, the non-motor vehicle is a bicycle.

Citation Information

Patent Citations

  • Bicycle speed change system and speed change method for power-assisted bicycle comprising same

    CN106627971A