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CN-120557332-B - Stepless speed change mechanism suitable for multiple scenes

CN120557332BCN 120557332 BCN120557332 BCN 120557332BCN-120557332-B

Abstract

The invention discloses a stepless speed change mechanism suitable for multiple scenes, which relates to the technical field of stepless speed change, and comprises a base, conical shafts, a transmission belt, an adjusting mechanism and an output mechanism, wherein the conical shafts, the transmission belt, the adjusting mechanism and the output mechanism are all arranged on the base, the conical shafts, the adjusting mechanism and the output mechanism are all in transmission connection with the transmission belt, the adjusting mechanism is used for changing the transmission ratio of the stepless speed change mechanism, and the winding direction, the transmission distance and the spatial layout of the mechanism of the transmission belt can be changed. The conical shafts, the driving belt, the adjusting mechanism and the output mechanism are arranged on the base, the number of the conical shafts is one or two, the adjusting mechanism is used for changing the transmission ratio of the stepless speed change mechanism in the operation process of the stepless speed change mechanism, and the bypassing direction and the transmission distance of the driving belt can be changed, so that the mechanism can be suitable for different occasions, and the application scene of the mechanism is greatly expanded.

Inventors

  • ZHANG YI
  • LI WEI
  • LI LIAN
  • ZHANG HUI
  • LI YUCHEN
  • LI FEIYANG

Assignees

  • 成都孚凯伊科技有限公司

Dates

Publication Date
20260512
Application Date
20250630

Claims (7)

  1. 1. The stepless speed change mechanism suitable for multiple scenes is characterized by comprising a base, conical shafts (101), a transmission belt (201), an adjusting mechanism and an output mechanism, wherein the conical shafts (101) are arranged on the base, the number of the conical shafts (101) is one or two, the conical shafts (101) can be configured into a spatial layout form of single shafts, two shafts are parallel, two shafts are coplanar and non-parallel or the two shafts are perpendicular to each other, the conical shafts (101), the adjusting mechanism and the output mechanism are in transmission connection with the transmission belt (201), and the adjusting mechanism is used for changing the transmission ratio of the stepless speed change mechanism and can also change the winding direction and the transmission distance of the transmission belt (201); The adjusting mechanism comprises a synchronizing mechanism and a pulley block which are arranged on the base at intervals, wherein the synchronizing mechanism and the pulley block are in transmission connection with the driving belt (201), the synchronizing mechanism is used for controlling the driving belt (201) to reciprocate in the axial direction of the conical shaft (101) so as to adjust the transmission ratio of the stepless speed change mechanism, and the pulley block is used for changing the bypassing direction and the transmission distance of the driving belt (201); The number of the synchronizing mechanisms is two, the synchronizing mechanisms are cooperatively operated, the synchronizing mechanisms are arranged on the base at intervals, any synchronizing mechanism is a screw-nut mechanism (301) arranged on the base, the pulley block comprises at least one first guiding group arranged on the base and two second guiding groups respectively arranged on two nuts (3011) of the two screw-nut mechanisms (301), each first guiding group comprises two first guiding wheels (302), any second guiding group comprises two second guiding wheels (303), the central axis of any first guiding wheel (302) and the central axis of any second guiding wheel (303) are not parallel to the central axis of the conical shaft (101), and the driving belt (201) is sleeved on the conical shaft (101) and then sequentially connected with the two second guiding wheels (303), the two first guiding wheels (302), the other two second guiding wheels (303) and the output mechanism in a driving mode.
  2. 2. The stepless speed change mechanism suitable for multiple scenes according to claim 1, wherein the number of the conical shafts (101) is one, the output mechanism is a transmission shaft (401) rotatably arranged on the base, the central axis of the transmission shaft (401) is parallel to the central axis of the conical shafts (101), the number of the first guide groups is one, 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 shafts (101), the transmission belt (201) is sleeved on the conical shafts (101) and then sequentially overlapped on 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 transmission shaft (401).
  3. 3. The stepless speed change mechanism suitable for multiple scenes according to claim 1 is characterized in that the number of the conical shafts (101) is two, the output mechanism is one conical shaft (101), the central axes of the two conical shafts (101) are parallel to each other, two large-diameter ends of the two conical shafts (101) are located on the same side, the number of the first guide groups is one, 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 shafts (101), the transmission belt (201) is sleeved on one conical shaft (101) and then sequentially overlapped on 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. 4. The stepless speed change mechanism suitable for multiple scenes according to claim 1 is characterized in that the number of the conical shafts (101) is two, the output mechanism is one conical shaft (101), the central axes of the two conical shafts (101) are parallel to each other, two large-diameter ends of the two conical shafts (101) are located on the same side, the number of the first guide groups is two, the two first guide groups are arranged at intervals, 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 shafts (101), the transmission belt (201) is sleeved on one conical shaft (101) and then sequentially overlapped on the two second guide wheels (303), the four first guide wheels (303) and the other two second guide wheels (303), and finally sleeved on the other conical shaft (101).
  5. 5. The stepless speed change mechanism suitable for multiple scenes is characterized in that the number of the conical shafts (101) is two, the output mechanism is one conical shaft (101), the central axes of the two conical shafts (101) are coplanar and non-parallel, two large-diameter ends of the two conical shafts (101) are positioned on the same side, the number of the first guide groups is two, the two first guide groups are arranged at intervals, 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 shafts (101), the transmission belt (201) is sleeved on one conical shaft (101) and then sequentially overlapped on 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).
  6. 6. The stepless speed change mechanism suitable for multiple scenes according to claim 1 is characterized in that two conical shafts (101) are arranged, the central axes of the two conical shafts (101) are perpendicular to each other, one conical shaft (101) is arranged in the output mechanism, the number of the first guide groups is two, the two first guide groups are arranged at intervals, the central axes of the four first guide wheels (302) are parallel to each other, the central axis of one conical shaft (101) is not perpendicular to the central axis of any first guide wheel (302), the driving belt (201) is sleeved on one conical shaft (101) and then sequentially overlapped on 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. 7. A continuously variable transmission suitable for multiple situations according to any one of claims 2-6, characterized in that a tensioning mechanism for adjusting the tension of the drive belt (201) is further provided on the nut (3011) of any of the lead screw nut mechanisms (301).

Description

Stepless speed change mechanism suitable for multiple scenes Technical Field The invention relates to the technical field of continuously variable transmissions, in particular to a continuously variable transmission mechanism applicable to multiple scenes. Background CVT (Continuously Variable Transmission) technology, i.e. stepless speed change technology, adopts the cooperation of a driving belt and a driving wheel and a driven wheel with variable working diameters to transmit power, and can realize continuous change of the transmission ratio, thereby obtaining the best matching of the driving system and the working condition of an engine. Chinese patent publication No. CN107178591B discloses a continuously variable transmission, which comprises an output shaft, an input shaft, a guiding mechanism, a driving belt and a pair of fixed shafts, wherein the two fixed shafts are arranged in parallel, the input shaft and the output shaft are arranged between the two fixed shafts, the driving belt is connected with the output shaft and the input shaft in a transmission manner, and the guiding mechanism is arranged between the output shaft and the input shaft and can slide along two ends of the input shaft, and is used for adjusting the position of the driving belt along the axial direction of the output shaft and the input shaft. The invention can obtain continuous smooth change ratio output in the use process, can obtain continuous even change transmission ratio when the transmission belt moves along the axial direction of the input shaft and the output shaft under the guidance of the guide mechanism due to the continuous smooth change of the axial diameters of the input shaft and the output shaft, ensures that the speed change is more stable and reliable, has low processing precision requirement and lower use and maintenance cost, has small abrasion in the whole use process, clear interface and can be replaced integrally. However, the above-mentioned technical solution has an important limitation that the two tapered shafts must be exactly parallel (the central axes of the two tapered shafts are parallel to each other) and disposed in opposite directions (the large diameter end of one tapered shaft must be located on the same side as the small diameter end of the other tapered shaft). This arrangement restricts the application scenarios of the technology to a certain extent, especially in situations where the deployment space is extremely limited. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a stepless speed change mechanism suitable for multiple scenes. The aim of the invention is realized by the following technical scheme: The stepless speed change mechanism suitable for multiple scenes comprises a base, and one or two conical shafts, a transmission belt, an adjusting mechanism and an output mechanism which are all arranged on the base, wherein the conical shafts, the adjusting mechanism and the output mechanism are in transmission connection with the transmission belt, the adjusting mechanism is used for changing the transmission ratio of the stepless speed change mechanism, and the bypassing direction and the transmission distance of the transmission belt can be changed. Further, in the invention, the adjusting mechanism comprises a synchronizing mechanism and a pulley block which are arranged on the base at intervals, the synchronizing mechanism and the pulley block are in transmission connection with the driving belt, the synchronizing mechanism is used for controlling the driving belt to reciprocate in the axis direction of the conical shaft so as to adjust the transmission ratio of the stepless speed change mechanism, and the pulley block is used for changing the bypassing direction and the transmission distance of the driving belt. Further, in the invention, the number of the synchronizing mechanisms is two, the synchronizing mechanisms are cooperatively operated, the interval is arranged on the base, any synchronizing mechanism is a screw nut mechanism arranged on the base, the pulley block comprises at least one first guide group arranged on the base, and two second guide groups respectively arranged on two nuts of the two groups of screw nut mechanisms, each first guide group comprises two first guide wheels, any second guide group comprises two second guide wheels, the central axis of any first guide wheel and the central axis of any second guide wheel are not parallel to the central axis of the conical shaft, and the transmission belt is sleeved on the conical shaft and then is sequentially connected with the two second guide wheels, the two first guide wheels, the other two second guide wheels and the output mechanism in a transmission way. Further, in the invention, the number of the conical shafts is one, the output mechanism is a transmission shaft rotatably arranged on the base, the central axis of the transmission shaft is parallel to the c