A stepless speed change mechanism suitable for multiple scenes

Abstract

The application discloses a kind of stepless speed change mechanism suitable for multiple scenes, it is related to stepless speed changer technical field, the stepless speed change mechanism includes pedestal and is all set on the conical shaft, transmission belt, adjusting mechanism and output mechanism on pedestal, the number of conical shaft is one or two, conical shaft, adjusting mechanism and output mechanism are all transmission connection with transmission belt;Adjusting mechanism is used to change the transmission ratio of stepless speed change mechanism, and transmission belt's direction of going around, transmission distance and the spatial layout of mechanism can also be changed.By installing conical shaft, transmission belt, adjusting mechanism and output mechanism on pedestal, the number of conical shaft is one or two, wherein adjusting mechanism is used to change the transmission ratio of stepless speed change mechanism in the operation process of this stepless speed change mechanism, and transmission belt's direction of going around and transmission distance can also be changed, so that this mechanism can be applied in different occasions, greatly expand its application scene.

Description

Technical Field

[0001] This invention relates to the field of continuously variable transmission (CVT) technology, and more specifically, to a CVT mechanism applicable to multiple scenarios. Background Technology

[0002] CVT (Continuously Variable Transmission) technology uses a drive belt and variable-diameter primary and driven pulleys to transmit power, enabling continuous changes in the transmission ratio and thus achieving optimal matching between the transmission system and engine operating conditions.

[0003] Chinese Patent CN107178591B discloses a continuously variable transmission (CVT), comprising an output shaft, an input shaft, a guide mechanism, a transmission belt, and a pair of fixed shafts. The two fixed shafts are arranged in parallel, with the input shaft and output shaft positioned between them. The transmission belt is connected to the output shaft and input shaft. The guide mechanism is located between the output shaft and input shaft and can slide along both ends of the input shaft, used to adjust the position of the transmission belt along the axial direction of the output and input shafts. This invention provides a continuously smooth output ratio during use. Due to the continuous and smooth change in the axial diameters of the input and output shafts, the transmission belt, guided by the guide mechanism, achieves a continuously and uniformly changing transmission ratio as it moves along the axial direction of the input and output shafts, resulting in smoother and more reliable speed changes. It requires less machining precision and has lower usage and maintenance costs. Throughout its use, wear during transmission is minimal, the interface is clear, and the entire unit can be replaced.

[0004] However, the above technical solution has an important limitation: the two tapered shafts must be installed strictly parallel (the central axes of the two tapered shafts are parallel to each other) and placed in opposite directions (the larger diameter end of one tapered shaft must be on the same side as the smaller diameter end of the other tapered shaft). This arrangement restricts the application scenarios of this technology to some extent, especially when the deployment space is extremely limited. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a continuously variable transmission mechanism suitable for multiple scenarios.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A continuously variable transmission (CVT) mechanism suitable for multiple scenarios includes a base and a tapered shaft, a transmission belt, an adjustment mechanism, and an output mechanism, all mounted on the base. The number of tapered shafts is one or two. The tapered shaft, the adjustment mechanism, and the output mechanism are all connected to the transmission belt. The adjustment mechanism is used to change the transmission ratio of the CVT mechanism and can also change the winding direction and transmission distance of the transmission belt.

[0008] Furthermore, in this invention, the adjustment mechanism includes a synchronization mechanism and a pulley group spaced apart on the base. Both the synchronization mechanism and the pulley group are connected to the transmission belt. The synchronization mechanism is used to control the transmission belt to reciprocate in the axial direction of the tapered shaft to adjust the transmission ratio of the continuously variable transmission mechanism. The pulley group is used to change the winding direction and transmission distance of the transmission belt.

[0009] Furthermore, in this invention, the number of the aforementioned synchronization mechanisms is two sets, which operate in coordination and are spaced apart on the aforementioned base. Any of the aforementioned synchronization mechanisms is a screw-nut mechanism disposed on the aforementioned base. The aforementioned pulley group includes at least one first guide group disposed on the aforementioned base, and two second guide groups disposed on the two nuts of the two sets of the aforementioned screw-nut mechanisms respectively. The aforementioned first guide group includes two first guide wheels, and any of the aforementioned second guide groups includes two second guide wheels. The central axis of any of the aforementioned first guide wheels and the central axis of any of the aforementioned second guide wheels are not parallel to the central axis of the aforementioned conical shaft. After the aforementioned transmission belt is sleeved on the aforementioned conical shaft, it is sequentially connected to the two aforementioned second guide wheels, the two aforementioned first guide wheels, the other two second guide wheels, and the output mechanism.

[0010] Furthermore, in this invention, the number of the aforementioned conical shafts is one; the aforementioned output mechanism is a transmission shaft, which is rotatably mounted on the aforementioned base, and the central axis of the aforementioned transmission shaft is parallel to the central axis of the aforementioned conical shaft; the number of the aforementioned first guide groups is one, and the central axis of any of the aforementioned first guide wheels and the central axis of any of the aforementioned second guide wheels are perpendicular to the central axis of the aforementioned conical shaft; the aforementioned transmission belt is sleeved on the aforementioned conical shaft and then sequentially overlaps two of the aforementioned second guide wheels, two of the aforementioned first guide wheels and two other second guide wheels, and finally sleeved on the aforementioned transmission shaft.

[0011] Furthermore, in this invention, the number of the aforementioned conical shafts is two; the aforementioned output mechanism is one of the aforementioned conical shafts; the central axes of the two aforementioned conical shafts are parallel to each other, and the two large-diameter ends of the two aforementioned conical shafts are located on the same side; the number of the aforementioned first guide group is one, and the central axis of any of the aforementioned first guide wheels and the central axis of any of the aforementioned second guide wheels are perpendicular to the central axis of the aforementioned conical shafts; the aforementioned transmission belt is sleeved on one of the aforementioned conical shafts and then successively overlaps on two of the aforementioned second guide wheels, two of the aforementioned first guide wheels and another two of the aforementioned second guide wheels, and finally sleeved on the other of the aforementioned conical shafts.

[0012] Furthermore, in this invention, there are two tapered shafts; the output mechanism is one of the tapered shafts; the central axes of the two tapered shafts are parallel to each other, and the two large-diameter ends of the two tapered shafts are located on the same side; there are two first guide groups, which are spaced apart, and the central axis of any first guide wheel and the central axis of any second guide wheel are perpendicular to the central axis of the tapered shaft; the transmission belt is fitted onto one of the tapered shafts and then successively overlaps the two second guide wheels, the four first guide wheels, and the other two second guide wheels, and finally fitted onto the other tapered shaft.

[0013] Furthermore, in this invention, the number of the aforementioned conical shafts is two; the aforementioned output mechanism is one of the conical shafts; the central axes of the two aforementioned conical shafts are coplanar and not parallel, and the two large-diameter ends of the two aforementioned conical shafts are located on the same side; the number of the aforementioned first guide groups is two, and the two aforementioned first guide groups are arranged at intervals, and the central axis of any of the aforementioned first guide wheels and the central axis of any of the aforementioned second guide wheels are perpendicular to the central axis of the aforementioned conical shafts; the aforementioned transmission belt is sleeved on one of the aforementioned conical shafts and then successively overlaps on two of the aforementioned second guide wheels, four of the aforementioned first guide wheels and another two second guide wheels, and finally sleeved on the other of the aforementioned conical shafts.

[0014] Furthermore, in this invention, there are two tapered shafts, and the central axes of the two tapered shafts are perpendicular to each other; the output mechanism is one of the tapered shafts; there are two first guide groups, which are spaced apart; the central axes of the four first guide wheels are parallel to each other, and the central axis of one of the tapered shafts is not perpendicular to the central axis of any of the first guide wheels; the transmission belt is sleeved on one of the tapered shafts and then successively overlaps the two second guide wheels, the four first guide wheels, and the other two second guide wheels, and finally sleeved on the other tapered shaft.

[0015] Furthermore, in this invention, any of the aforementioned lead screw and nut mechanisms is further provided with a tensioning mechanism for adjusting the tension of the aforementioned transmission belt.

[0016] The beneficial effects of this invention are:

[0017] This invention provides a continuously variable transmission (CVT) mechanism suitable for multiple scenarios. By installing a tapered shaft, a transmission belt, an adjustment mechanism, and an output mechanism on a base, the CVT mechanism can have one or two tapered shafts. The adjustment mechanism is used to change the transmission ratio of the CVT mechanism during operation, and can also change the winding direction and transmission distance of the transmission belt, so that this mechanism can be used in different occasions, greatly expanding its application scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0019] Figure 2 for Figure 1 Sectional view of section AA;

[0020] Figure 3 This is a schematic diagram of the tensioning mechanism according to Embodiment 1 of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0022] Figure 5 for Figure 3 Sectional view of section BB;

[0023] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of the present invention;

[0024] Figure 7 for Figure 5 A sectional view of section C-C;

[0025] Figure 8 This is a schematic diagram of the structure of Embodiment 4 of the present invention;

[0026] Figure 9 This is a structural schematic diagram of Embodiment 5 of the present invention.

[0027] In the diagram: 101-tapered shaft; 201-transmission belt; 301-screw and nut mechanism; 3011-nut; 302-first guide wheel; 303-second guide wheel; 401-transmission shaft; 501-bracket; 502-slider; 503-hydraulic rod; 504-tensioning wheel. Detailed Implementation

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] Please see Figures 1-3 This embodiment provides a technical solution:

[0031] A continuously variable transmission (CVT) mechanism suitable for multiple scenarios includes a base (not shown in the figure), a tapered shaft 101, a transmission belt 201, an adjustment mechanism, and an output mechanism, all mounted on the base. The tapered shaft 101, the adjustment mechanism, and the output mechanism are all connected to the transmission belt 201. The adjustment mechanism is used to change the transmission ratio of the CVT mechanism and can also change the winding direction and transmission distance of the transmission belt 201.

[0032] Specifically, in this embodiment, the adjustment mechanism includes a synchronization mechanism and a pulley group installed at intervals on the base. Both the synchronization mechanism and the pulley group are connected to the transmission belt 201. The synchronization mechanism is used to control the reciprocating movement of the transmission belt 201 in the axial direction of the tapered shaft 101 to adjust the transmission ratio of the continuously variable transmission mechanism. The pulley group is used to change the winding direction and transmission distance of the transmission belt 201.

[0033] Preferably, in this embodiment, there are two sets of synchronization mechanisms, which operate in coordination, and the two sets of synchronization mechanisms are installed alternately on the base. Any synchronization mechanism is a lead screw and nut mechanism 301 installed on the base.

[0034] Preferably, the pulley block includes at least one first guide group mounted on the base, and two second guide groups respectively mounted on two nuts 3011 of the two sets of lead screw and nut mechanisms 301. The first guide group includes two first guide wheels 302, and any second guide group includes two second guide wheels 303. The installation method is such that the central axis of any first guide wheel 302 and the central axis of any second guide wheel 303 are perpendicular to the central axis of the tapered shaft 101. After the transmission belt 201 is sleeved on the tapered shaft 101, it is sequentially connected to the two second guide wheels 303, the two first guide wheels 302, the other two second guide wheels 303, and the output mechanism.

[0035] Specifically, in this embodiment, the output mechanism is a drive shaft 401 rotatably mounted on the base, with the central axis of the drive shaft 401 parallel to the central axis of the tapered shaft 101. In this embodiment, there is one set of first guide groups. During installation, two first guide wheels 302 are coaxially mounted and rotatably connected to the base; four second guide wheels 303 are coaxially mounted in pairs and rotatably connected to their respective nuts 3011; and during installation, the central axis of any first guide wheel 302 and the central axis of any second guide wheel 303 are perpendicular to the central axis of the tapered shaft 101. The drive belt 201 is fitted onto the tapered shaft 101 and then sequentially overlaps the two second guide wheels 303, the two first guide wheels 302, and the other two second guide wheels 303, finally fitting onto the drive shaft 401.

[0036] In this embodiment, a tensioning mechanism for controlling the tension of the transmission belt 201 is also installed on the nut 3011 of the arbitrary lead screw nut mechanism 301.

[0037] Specifically, refer to Figure 2 and Figure 3 In this embodiment, the tensioning mechanism includes a bracket 501 mounted on a nut 3011, two sliders 502 slidably mounted on the bracket 501, and two hydraulic rods 503 mounted on the bracket 501. Each slider 502 is rotatably mounted with a tensioning wheel 504. The two sliders 502 and the two hydraulic rods 503 are symmetrically distributed about the central axis of the tapered shaft 101. The actuating ends of the two hydraulic rods 503 abut against the two sliders 502. The two hydraulic rods 503 can extend or shorten at the same time, which can make the two sliders 502 move closer or further away from each other. The two tensioning wheels 504 can then move closer or further away from each other to adjust the tension of the transmission belt 201.

[0038] Working principle:

[0039] from Figure 1 From this perspective, when the transmission ratio of this continuously variable transmission (CVT) mechanism does not need to be changed, the two lead screw and nut mechanisms 301 are not working, and neither of the left nor right nuts 3011 can move on the lead screw. At this time, if the left tapered shaft 101 is the input shaft and the right drive shaft 401 is the output shaft, when the tapered shaft 101 rotates, the drive shaft 401 will rotate under the action of the drive belt 201. One end of the drive shaft 401 is then connected to the corresponding actuator, thus driving the actuator through this mechanism.

[0040] In this layout, when the transmission ratio of this continuously variable transmission (CVT) needs to be changed, both lead screw and nut mechanisms 301 operate simultaneously. This makes the tapered shaft 101 the input shaft and the transmission shaft 401 the output shaft. For example, from... Figure 1 From the perspective of [unclear context], if the left lead screw and nut mechanism 301 causes the left portion of the transmission belt 201 to move upward on the tapered shaft 101, while the right lead screw and nut mechanism 301 causes the right portion of the transmission belt 201 to move downward on the transmission shaft 401, and if the rotational speed of the tapered shaft 101 (the input shaft) remains constant during this process, the transmission ratio of this continuously variable transmission mechanism will change; that is, the rotational speed of the transmission shaft 401 will gradually increase. The specific reason is that, as the left portion of the transmission belt 201 gradually moves upward during the above process, the diameter of the cross-section of the contact area between the transmission belt 201 and the tapered shaft 101 gradually increases. Since the transmission ratio is the ratio of the radii corresponding to the friction points of the tapered shaft 101 and the transmission shaft 401, the synchronous movement of the transmission belt 201 on both sides will produce a continuously smooth transmission output with a variable ratio.

[0041] Because the diameter of the tapered shaft 101 changes during the axial movement of the transmission belt 201 along the tapered shaft 101, while the diameter of the transmission shaft 401 remains unchanged, the tensioning mechanism must adjust the tension of the transmission belt 201 in real time to ensure smooth transmission. The adaptive automatic extension and retraction of the two hydraulic rods 503 can be controlled by an automatic control mechanism (control circuit, etc.). Since this control method is existing technology, it will not be elaborated upon further here.

[0042] from Figure 1 From the perspective of the right screw and nut mechanism 301, when the right part of the transmission belt 201 moves downward on the transmission shaft 401, the tension of the transmission belt 201 may change because the perimeters of different sections of the left tapered shaft 101 are different. In order to maintain the tension of the transmission belt 201 during this process to ensure transmission friction, dynamic tension mechanisms of different types such as springs, hydraulics, and gravity levers can be introduced. These are all common methods in the field of mechanics.

[0043] Example 2

[0044] Please see Figure 4 and Figure 5 The difference between this embodiment and Embodiment 1 is that: in this embodiment, there are two tapered shafts 101; the output mechanism is one of the tapered shafts 101; the central axes of the two tapered shafts 101 are parallel to each other, and the two large-diameter ends of the two tapered shafts 101 are located on the same side. There is one first guide group, and the central axis of any first guide wheel 302 and any second guide wheel 303 is perpendicular to the central axis of the tapered shaft 101. The transmission belt 201 is fitted onto one of the tapered shafts 101 and then sequentially overlaps the two second guide wheels 303, the two first guide wheels 302, and the other two second guide wheels 303, finally fitting onto the other tapered shaft 101. The tapered shaft 101, serving as the output shaft, is then connected to the corresponding actuator for transmission.

[0045] In this layout, when the transmission ratio of this continuously variable transmission (CVT) needs to be changed, both lead screw and nut mechanisms 301 operate simultaneously. For example, from... Figure 4 From the perspective of the left screw and nut mechanism 301, the left part of the transmission belt 201 moves upward on the left tapered shaft 101, while the right screw and nut mechanism 301 moves the right part of the transmission belt 201 downward on the right tapered shaft 101. During this process, the transmission ratio of this continuously variable transmission mechanism will change (if the left tapered shaft 101 is the input shaft and its speed is constant, and the right tapered shaft 101 is the output shaft, then the speed of the right tapered shaft 101 will change).

[0046] The tensioning mechanism in this embodiment also adopts the tensioning mechanism in Embodiment 1 to adjust the tension of the transmission belt 201.

[0047] Example 3

[0048] Please see Figure 6 and Figure 7 The difference between this embodiment and Embodiment 1 is as follows: In this embodiment, there are two tapered shafts 101; the output mechanism is one of the tapered shafts 101; the central axes of the two tapered shafts 101 are parallel to each other, and the two large-diameter ends of the two tapered shafts 101 are located on the same side; there are two first guide groups, which are installed alternately, and the central axis of any first guide wheel 302 and the central axis of any second guide wheel 303 are perpendicular to the central axis of the tapered shaft 101; the transmission belt 201 is fitted onto one of the tapered shafts 101 and then successively overlaps the two second guide wheels 303, the four first guide wheels 302, and the other two second guide wheels 303, and finally fitted onto the other tapered shaft 101. The tapered shaft 101, as the output shaft, is then connected to the corresponding actuator for transmission.

[0049] The distance between the two first guide groups can be adjusted according to the actual situation so that this continuously variable transmission mechanism can be applied to different transmission distances and scenarios.

[0050] The tensioning mechanism in this embodiment also adopts the tensioning mechanism in Embodiment 1 to adjust the tension of the transmission belt 201.

[0051] Example 4

[0052] Please see Figure 8 The difference between this embodiment and Embodiment 1 is that: in this embodiment, there are two tapered shafts 101; the output mechanism is one of the tapered shafts 101; the central axes of the two tapered shafts 101 are coplanar and not parallel, and the two large-diameter ends of the two tapered shafts 101 are located on the same side; there are two first guide groups, and the two first guide groups are installed at intervals, and the central axis of any first guide wheel 302 and the central axis of any second guide wheel 303 are perpendicular to the central axis of the tapered shaft 101; the transmission belt 201 is sleeved on one of the tapered shafts 101 and then successively overlaps the two second guide wheels 303, the four first guide wheels 302 and the other two second guide wheels 303, and finally sleeved on the other tapered shaft 101.

[0053] This layout also allows the continuously variable transmission (CVT) to be applicable to different transmission distances and scenarios.

[0054] The tensioning mechanism in this embodiment also adopts the tensioning mechanism in Embodiment 1 to adjust the tension of the transmission belt 201.

[0055] Example 5

[0056] Please see Figure 9 The difference between this embodiment and Embodiment 1 is that: in this embodiment, there are two tapered shafts 101, and the central axes of the two tapered shafts 101 are perpendicular to each other; the output mechanism is one of the tapered shafts 101; there are two first guide groups, which are spaced apart, and the central axes of the four first guide wheels 302 are parallel to each other, and the central axis of one tapered shaft 101 is not perpendicular to the central axis of any first guide wheel 302 (the central axis of one tapered shaft 101 can be parallel to the central axis of any first guide wheel 302); the transmission belt 201 is sleeved on one of the tapered shafts 101 and then successively overlaps the two second guide wheels 303, the four first guide wheels 302 and the other two second guide wheels 303, and finally sleeved on the other tapered shaft 101.

[0057] In this layout, the installation of the two tapered shafts 101 must be such that when a part of the transmission belt 201 moves toward its larger diameter end on one tapered shaft 101, a part of the transmission belt 201 moves toward its smaller diameter end on the other tapered shaft 101.

[0058] This layout also allows the continuously variable transmission (CVT) to be applicable to different transmission distances and scenarios.

[0059] The tensioning mechanism in this embodiment also adopts the tensioning mechanism in Embodiment 1 to adjust the tension of the transmission belt 201.

[0060] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A continuously variable transmission mechanism suitable for multiple scenarios, characterized in that: The system includes a base and tapered shafts (101) all mounted on the base, a transmission belt (201), an adjustment mechanism, and an output mechanism. The tapered shafts (101) can be one or two. The tapered shafts (101) can be configured as a single shaft, two parallel shafts, two coplanar but non-parallel shafts, or two mutually perpendicular spatial layouts. The tapered shafts (101), the adjustment mechanism, and the output mechanism are all connected to the transmission belt (201) for transmission. The adjustment mechanism is used to change the transmission ratio of the continuously variable transmission mechanism and can also change the winding direction and transmission distance of the transmission belt (201). The adjustment mechanism includes a synchronization mechanism and a pulley group spaced apart on the base. Both the synchronization mechanism and the pulley group are connected to the transmission belt (201). The synchronization mechanism is used to control the transmission belt (201) to reciprocate in the axial direction of the tapered shaft (101) to adjust the transmission ratio of the continuously variable transmission mechanism. The pulley group is used to change the winding direction and transmission distance of the transmission belt (201). The number of synchronization mechanisms is two sets, which operate in coordination and are spaced apart on the base. Each synchronization mechanism is a screw and nut mechanism (301) set on the base. The pulley group includes at least one first guide group set on the base and two second guide groups set on the two nuts (3011) of the two sets of screw and nut mechanisms (301), respectively. The first guide group includes two first guide wheels (302), and each second guide group includes two second guide wheels (303). The central axis of any first guide wheel (302) and the central axis of any second guide wheel (303) are not parallel to the central axis of the tapered shaft (101). After the transmission belt (201) is sleeved on the tapered shaft (101), it is sequentially connected to the two second guide wheels (303), the two first guide wheels (302), the other two second guide wheels (303), and the output mechanism.

2. The continuously variable transmission mechanism applicable to multiple scenarios according to claim 1, characterized in that: The number of tapered shafts (101) is one; the output mechanism is a transmission shaft (401) rotatably mounted on the base, and the central axis of the transmission shaft (401) is parallel to the central axis of the tapered shaft (101); the number of the first guide group is one, and the central axis of any first guide wheel (302) and any second guide wheel (303) is perpendicular to the central axis of the tapered shaft (101); the transmission belt (201) is sleeved on the tapered shaft (101) and then successively overlaps two second guide wheels (303), two first guide wheels (302) and two other second guide wheels (303), and finally sleeved on the transmission shaft (401).

3. The continuously variable transmission mechanism applicable to multiple scenarios according to claim 1, characterized in that: The number of the conical shafts (101) is two; the output mechanism is one of the conical shafts (101); the central axes of the two conical shafts (101) are parallel to each other, and the two large-diameter ends of the two conical shafts (101) are located on the same side; the number of the first guide group is one, and the central axis of any first guide wheel (302) and the central axis of any second guide wheel (303) are perpendicular to the central axis of the conical shaft (101); the transmission belt (201) is sleeved on one of the conical shafts (101) and then successively overlaps the two second guide wheels (303), the two first guide wheels (302) and the other two second guide wheels (303), and finally sleeved on the other conical shaft (101).

4. A continuously variable transmission mechanism suitable for multiple scenarios according to claim 1, characterized in that: The number of tapered shafts (101) is two; the output mechanism is one of the tapered shafts (101); the central axes of the two tapered shafts (101) are parallel to each other, and the two large-diameter ends of the two tapered shafts (101) are located on the same side; the number of the first guide groups is two, and the two first guide groups are spaced apart, and the central axis of any first guide wheel (302) and the central axis of any second guide wheel (303) are perpendicular to the central axis of the tapered shaft (101); the transmission belt (201) is sleeved on one of the tapered shafts (101) and then successively overlaps the two second guide wheels (303), the four first guide wheels (302) and the other two second guide wheels (303), and finally sleeved on the other tapered shaft (101).

5. A continuously variable transmission mechanism suitable for multiple scenarios according to claim 1, characterized in that: The number of tapered shafts (101) is two; the output mechanism is one of the tapered shafts (101); the central axes of the two tapered shafts (101) are coplanar and not parallel, and the two large-diameter ends of the two tapered shafts (101) are located on the same side; the number of the first guide groups is two, and the two first guide groups are arranged at intervals, and the central axis of any first guide wheel (302) and the central axis of any second guide wheel (303) are perpendicular to the central axis of the tapered shaft (101); the transmission belt (201) is sleeved on one of the tapered shafts (101) and then successively overlaps the two second guide wheels (303), the four first guide wheels (302) and the other two second guide wheels (303), and finally sleeved on the other tapered shaft (101).

6. A continuously variable transmission mechanism suitable for multiple scenarios according to claim 1, characterized in that: The number of the conical shafts (101) is two, and the central axes of the two conical shafts (101) are perpendicular to each other; the output mechanism is one of the conical shafts (101); the number of the first guide groups is two, the two first guide groups are spaced apart, the central axes of the four first guide wheels (302) are parallel to each other, and the central axis of one of the conical shafts (101) is not perpendicular to the central axis of any of the first guide wheels (302); the transmission belt (201) is sleeved on one of the conical shafts (101) and then successively overlaps the two second guide wheels (303), the four first guide wheels (302) and the other two second guide wheels (303), and finally sleeved on the other conical shaft (101).

7. A continuously variable transmission mechanism suitable for multiple scenarios according to any one of claims 2-6, characterized in that: The nut (3011) of any of the lead screw and nut mechanisms (301) is also provided with a tensioning mechanism for adjusting the tension of the transmission belt (201).

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