A new type of continuously variable transmission

Abstract

A novel continuously variable transmission device includes an input shaft and an output shaft both arranged in the left-right direction, the input shaft is located on the right side of the output shaft, a first automatic pressurizing mechanism and a second automatic pressurizing mechanism are respectively arranged on the left and right sides of the input shaft, a roller position radial sliding output mechanism is respectively arranged between the first automatic pressurizing mechanism and the second automatic pressurizing mechanism on the front and rear sides of the input shaft, and the power output ends of the two roller position radial sliding output mechanisms are connected to the output shaft in a transmission manner. The first locking nut and the second locking nut in the present invention respectively limit the first pressure plate and the third pressure plate, and seal the positive pressure between the friction plate and the roller on the input shaft, and the bearings at both ends of the input shaft do not bear the positive pressure, so that the continuously variable transmission device is suitable for high-speed rotation; the reversing mechanism makes the first friction plate and the second friction plate turn in opposite directions, so that the two friction plates can drive the roller at the same time, with large torque transmission, high transmission efficiency and good speed change performance.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical speed change transmission, and in particular relates to a novel continuously variable speed change device. Background Art

[0002] The existing continuously variable transmission (CVT) uses two transmission wheels with variable diameters, with a transmission belt in the middle for transmission. The principle of the continuously variable transmission is to wind the two ends of the transmission belt around a conical pulley, and the outer diameter of the pulley changes steplessly depending on the oil pressure. There is also a continuously variable transmission that replaces the two transmission wheels with variable diameters with two non-concentric friction disks. When these two transmission devices are working, the transmission wheels and friction disks are fixed to the transmission case, and the transmission case is subjected to greater force. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a novel continuously variable transmission device with a compact structure, high transmission efficiency and a transmission case that is not subjected to stress during operation.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a new type of continuously variable transmission device, including an input shaft and an output shaft arranged in the left and right directions, the input shaft is located on the right side of the output shaft, and a first automatic pressurizing mechanism and a second automatic pressurizing mechanism are respectively arranged on the left and right sides of the input shaft, and a roller position radial sliding output mechanism is respectively provided between the first automatic pressurizing mechanism and the second automatic pressurizing mechanism on the front and rear sides of the input shaft, and the power output ends of the two roller position radial sliding output mechanisms are transmission-connected to the output shaft.

[0005] The second automatic pressurizing mechanism includes a first locking nut, a first pressure plate, a first rolling torque transmitter, a second pressure plate, a thrust ball retainer and a first friction plate which are coaxially installed on the input shaft from right to left. The inner circle of the first pressure plate is spline-connected to the outer circle of the input shaft, the first locking nut is threadedly connected to the outer circle of the input shaft, the left side of the first locking nut is tightly pressed with the right side of the first pressure plate, the left side of the first friction plate is a friction surface, the left side of the second pressure plate and the right side of the first friction plate are both provided with annular grooves which are pressed and rollingly matched with the thrust ball in the thrust ball retainer, the outer side of the thrust ball retainer is fixedly connected to the housing of the speed change device, and the left side of the first pressure plate is pressed with the right side of the second pressure plate through the first rolling torque transmitter.

[0006] The first rolling torque transmitter includes a first ball retainer coaxially mounted on the input shaft. The first ball retainer is provided with a number of first balls along the circumferential direction. The left side surface of the first pressure plate is provided with a number of first right V-shaped grooves. All the first right V-shaped grooves are arranged in a circumferential array along the center line of the input shaft. The center line of the first right V-shaped groove is along the radial direction of the input shaft. The right side surface of the second pressure plate is provided with first left V-shaped grooves that are equal in number and in one-to-one correspondence with the first right V-shaped grooves. The first balls are arranged inside the diamond-shaped space formed by the first right V-shaped grooves and the first left V-shaped grooves.

[0007] The first automatic pressurizing mechanism includes a second locking nut, a third pressure plate, a second rolling torque transmitter, and a second friction plate that are coaxially mounted on the input shaft in sequence from left to right. The inner circle of the third pressure plate is splined to the outer circle of the input shaft. The second locking nut is threadedly connected to the outer circle of the input shaft. The right side of the second locking nut is tightly pressed against the left side of the third pressure plate. The right side surface of the third pressure plate is drivingly and pressingly connected to the left side surface of the second friction plate through the second rolling torque transmitter. The right side surface of the second friction plate is a friction surface.

[0008] The second rolling torque transmitter includes a second ball retainer coaxially mounted on the input shaft. The second ball retainer is provided with a number of second balls along the circumferential direction. The right side surface of the third pressure plate is provided with a number of second left V-shaped grooves. All the second left V-shaped grooves are arranged in a circumferential array along the center line of the input shaft. The center line of the second left V-shaped groove is along the radial direction of the input shaft. The left side surface of the second friction plate is provided with second right V-shaped grooves that are equal in number and in one-to-one correspondence with the second left V-shaped grooves. The second balls are arranged inside the diamond-shaped space formed by the second left V-shaped grooves and the second right V-shaped grooves.

[0009] The structures of the two roller position radially sliding output mechanisms are the same and are symmetrically arranged about the center line of the input shaft. Each roller position radially sliding output mechanism includes a center spline shaft perpendicular to the input shaft. A roller and a first bevel gear are coaxially mounted on the center spline shaft. The roller is slidably connected to the center spline shaft. The left side and the right side of the roller are respectively in rolling and pressing contact with the right side surface of the second friction plate and the left side surface of the first friction plate. A second bevel gear is mounted on the output shaft. The first bevel gears of the two roller position radially sliding output mechanisms are simultaneously meshed with the second bevel gear.

[0010] First disc springs are provided on both the left and right sides of the first ball retainer. The left first disc spring is pressingly connected to the right side surface of the second pressure plate, and the right first disc spring is pressingly connected to the left side surface of the first pressure plate.

[0011] Second disc springs are provided on both the left and right sides of the second ball retainer. The left second disc spring is pressingly connected to the right side surface of the third pressure plate, and the right second disc spring is pressingly connected to the left side surface of the second friction plate.

[0012] With the above technical solution, all components in the present invention are arranged inside the gearbox housing, and the right end of the input shaft and the left end of the output shaft extend out of the left and right sides of the housing respectively. The first locking nut in the present invention is used to position and lock the first pressure plate, and the second locking nut is used to position and lock the third pressure plate. The two rollers are respectively rotationally matched with the first friction plate and the second friction plate, that is, the first friction plate and the second friction plate lock the frictional force of the two rollers in the axial direction of the input shaft, and the housing of the gearbox is no longer stressed, thereby making the structure compact, the speed change performance better, and the transmission efficiency higher. The thrust ball retainer in the present invention is fixed to the housing of the speed change device, and the thrust ball retainer is used to maintain the position of the thrust ball, so that the second pressure plate, the thrust ball, the thrust ball retainer and the first friction plate form a reverse mechanism, making the rotation directions of the first friction plate and the second friction plate opposite, so that the two friction plates can drive the two rollers at the same time, with large torque transmission, high transmission efficiency and good speed change performance.

[0013] The first disc spring and the second disc spring both serve to ensure that the second friction plate and the first friction plate always maintain pressure on the left and right sides of the two rollers, ensuring the reliability of frictional transmission.

[0014] The stepless speed regulation principle of the present invention is: when the rotational speed of the input shaft is constant, the linear speeds of the friction surfaces of the first friction plate and the second friction plate at each point in the radial direction are different. By changing the contact position of the rollers with the friction surfaces of the friction plates, the purpose of changing the rotational speed is achieved. The two symmetrically arranged rollers slide synchronously along the symmetry axis of the central spline, and the contact point position on the friction surface between the rollers and the friction plates can be changed to achieve stepless speed change. The sliding drive mechanism of the rollers along the central spline shaft is a conventional existing technology, and the specific structure will not be elaborated. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the structural schematic diagram of the present invention;

[0016] Figure 2 is the implementation structure diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] As Figure 1 and Figure 2 shown, a novel stepless speed change device of the present invention includes an input shaft 1 and an output shaft 2 both arranged in the left-right direction. The input shaft 1 is located on the right side of the output shaft 2. A first automatic pressure applying mechanism and a second automatic pressure applying mechanism are respectively arranged on the left and right sides of the input shaft 1. A roller position radially sliding output mechanism is respectively arranged in front of and behind the input shaft 1 between the first automatic pressure applying mechanism and the second automatic pressure applying mechanism. The power output ends of the two roller position radially sliding output mechanisms are drivingly connected to the output shaft 2.

[0018] The second automatic pressure - increasing mechanism includes a first locking nut 3, a first pressure plate 4, a first rolling torque transmitter, a second pressure plate 22, a thrust ball retainer 25, and a first friction plate 6 that are coaxially installed on the input shaft 1 in sequence from right to left. The inner circle of the first pressure plate 4 is splined to the outer circle of the input shaft 1. The first locking nut 3 is threadedly connected to the outer circle of the input shaft 1. The left side of the first locking nut 3 is tightly press - connected to the right side of the first pressure plate 4. The left side surface of the first friction plate 6 is a friction surface. Annular grooves for pressing and rolling cooperation with the thrust balls 5 inside the thrust ball retainer 25 are provided on the left side surface of the second pressure plate 22 and the right side surface of the first friction plate 6. The outer side of the thrust ball retainer 25 is fixedly connected to the housing 26 of the speed - changing device. The left side surface of the first pressure plate 4 is drivingly press - connected to the right side surface of the second pressure plate 22 through the first rolling torque transmitter.

[0019] The first rolling torque transmitter includes a first ball retainer 7 coaxially installed on the input shaft. The first ball retainer 7 is provided with a number of first balls 8 along the circumferential direction. A number of first right V - shaped grooves 18 are formed on the left side surface of the first pressure plate 4. All the first right V - shaped grooves 18 are circumferentially arranged in an array along the center line of the input shaft 1. The center line of the first right V - shaped grooves 18 is along the radial direction of the input shaft 1. A number of first left V - shaped grooves 19 equal in number and corresponding one - to - one to the first right V - shaped grooves 18 are formed on the right side surface of the second pressure plate 22. The first balls 8 are arranged inside the diamond - shaped space formed by the first right V - shaped grooves 18 and the first left V - shaped grooves 19.

[0020] The first automatic pressure - increasing mechanism includes a second locking nut 9, a third pressure plate 10, a second rolling torque transmitter, and a second friction plate 11 that are coaxially installed on the input shaft 1 in sequence from left to right. The inner circle of the third pressure plate 10 is splined to the outer circle of the input shaft 1. The second locking nut 9 is threadedly connected to the outer circle of the input shaft 1. The right side of the second locking nut 9 is tightly press - connected to the left side of the third pressure plate 10. The right side surface of the third pressure plate 10 is drivingly press - connected to the left side surface of the second friction plate 11 through the second rolling torque transmitter. The right side surface of the second friction plate 11 is a friction surface.

[0021] The second rolling torque transmitter includes a second ball retainer 12 coaxially installed on the input shaft. The second ball retainer 12 is provided with a number of second balls 13 along the circumferential direction. A number of second left V - shaped grooves 20 are formed on the right side surface of the third pressure plate 10. All the second left V - shaped grooves 20 are circumferentially arranged in an array along the center line of the input shaft 1. The center line of the second left V - shaped grooves 20 is along the radial direction of the input shaft 1. A number of second right V - shaped grooves 21 equal in number and corresponding one - to - one to the second left V - shaped grooves 20 are formed on the left side surface of the second friction plate 11. The second balls 13 are arranged inside the diamond - shaped space formed by the second left V - shaped grooves 20 and the second right V - shaped grooves 21.

[0022] The structures of the two roller position radial sliding output mechanisms are the same and are symmetrically arranged about the center line of the input shaft 1. Each roller position radial sliding output mechanism includes a central spline shaft 14 perpendicular to the input shaft 1. A roller 15 and a first bevel gear 16 are coaxially installed on the central spline shaft 14. The roller 15 is slidably connected to the central spline shaft 14, and the left and right sides of the roller 15 are respectively in rolling press contact with the right side surface of the second friction disc 11 and the left side surface of the first friction disc 6. A second bevel gear 17 is installed on the output shaft 2, and the first bevel gears 16 of the two roller position radial sliding output mechanisms are simultaneously meshed with the second bevel gear 17.

[0023] First ball retainers 7 are provided with first disc springs 23 on both the left and right sides. The first disc spring 23 on the left side is in press contact with the right side surface of the second pressure plate 22, and the first disc spring 23 on the right side is in press contact with the left side surface of the first pressure plate 4.

[0024] Second ball retainers 12 are provided with second disc springs 24 on both the left and right sides. The second disc spring 24 on the left side is in press contact with the right side surface of the third pressure plate 10, and the second disc spring 24 on the right side is in press contact with the left side surface of the second friction disc 11.

[0025] Both the first disc spring 23 and the second disc spring 24 serve to ensure that the pressures of the second friction disc 11 and the first friction disc 6 are always maintained on both the left and right sides of the two rollers 15, ensuring the reliability of frictional transmission.

[0026] The specific working process of the present invention is as follows: Power is transmitted from the input shaft 1 to the output shaft 2. The rotation of the input shaft 1 drives the first pressure plate 4 and the third pressure plate 10 to rotate. The right side surface of the third pressure plate 10 drives the second friction disc 11 to rotate through a number of second balls 13. The second ball retainer 12 limits the second balls 13 to only rotate and not move radially. At the same time, the left side surface of the first pressure plate 4 drives the second pressure plate 22 to rotate through a number of first balls 8. The thrust ball retainer 25 is fixed to the housing 26 of the speed change device. Therefore, the steel balls of the thrust ball 5 cannot rotate along the annular groove on the right side surface of the first friction disc 6. This transmission structure enables the second pressure plate 22, the thrust ball 5, the thrust ball retainer 25, and the first friction disc 6 to form a reverse mechanism, making the rotation directions of the first friction disc 6 and the second friction disc 11 opposite, so that the first friction disc 6 and the second friction disc 11 can simultaneously drive the two rollers 15 to rotate. The rollers 15 drive the first bevel gears 16 to rotate through the central spline shaft 14. The two first bevel gears 16 simultaneously transmit the motion to the second bevel gear 17, and the second bevel gear 17 drives the output shaft 2 to output power. During the working process, by synchronously changing the contact point positions of the two rollers 15 with the first friction disc 6 and the second friction disc 11 in the radial direction, the control of stepless speed change is achieved.

[0027] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, creatively design structural manners and embodiments similar to the technical solution, they shall fall within the protection scope of the present invention. At the same time, directions such as "front, rear, left, right, up, and down" described are only for the convenience of those of ordinary skill in the art to understand the technical solution and do not limit the protection scope of the present invention.

Claims

1. A novel continuously variable transmission device, comprising an input shaft and an output shaft both arranged in the left-right direction, wherein the input shaft is located on the right side of the output shaft. Features: A first automatic pressurizing mechanism and a second automatic pressurizing mechanism are respectively arranged on the left and right sides of the input shaft, and a roller position radial sliding output mechanism is respectively arranged between the first automatic pressurizing mechanism and the second automatic pressurizing mechanism on the front and rear sides of the input shaft, and the power output ends of the two roller position radial sliding output mechanisms are drivingly connected to the output shaft; The second automatic pressurizing mechanism comprises a first locking nut, a first pressurizing plate, a first rolling torque transmitter, a second pressurizing plate, a thrust ball retainer and a first friction plate which are coaxially installed on the input shaft from right to left in sequence, the inner circle of the first pressurizing plate is spline-connected to the outer circle of the input shaft, the first locking nut is thread-connected to the outer circle of the input shaft, the left side of the first locking nut is tightly pressed with the right side of the first pressurizing plate, the left side of the first friction plate is a friction surface, the left side of the second pressurizing plate and the right side of the first friction plate are both provided with annular grooves which are pressed and rollingly matched with the thrust ball in the thrust ball retainer, the outer side of the thrust ball retainer is fixedly connected to the housing of the speed change device, and the left side of the first pressurizing plate is pressed with the right side of the second pressurizing plate through the first rolling torque transmitter; The first rolling torque transmitter includes a first ball retainer coaxially mounted on the input shaft, the first ball retainer is provided with a plurality of first balls along the circumferential direction, a plurality of first right V-shaped grooves are provided on the left side of the first pressure plate, all of the first right V-shaped grooves are arranged in a circumferential array along the center line of the input shaft, the center line of the first right V-shaped groove is along the radial direction of the input shaft, the right side of the second pressure plate is provided with first left V-shaped grooves equal in number to the first right V-shaped grooves and corresponding to each other, and the first balls are arranged inside a rhombus-shaped space formed by the first right V-shaped grooves and the first left V-shaped grooves; The first automatic pressurizing mechanism comprises a second locking nut, a third pressurizing plate, a second rolling torque transmitter and a second friction plate which are coaxially installed on the input shaft from left to right, the inner circle of the third pressurizing plate is spline-connected to the outer circle of the input shaft, the second locking nut is thread-connected to the outer circle of the input shaft, the right side of the second locking nut is tightly pressed with the left side of the third pressurizing plate, the right side surface of the third pressurizing plate is pressed with the left side surface of the second friction plate through the second rolling torque transmitter, and the right side surface of the second friction plate is a friction surface; The structures of the two roller position radial sliding output mechanisms are the same and are arranged symmetrically about the center line of the input shaft. Each roller position radial sliding output mechanism includes a central spline shaft perpendicular to the input shaft, and a roller and a first bevel gear are coaxially installed on the central spline shaft. The roller is slidingly connected to the central spline shaft, and the left and right sides of the sliding roller are rollingly pressed with the right side surface of the second friction disk and the left side surface of the first friction disk respectively; the second bevel gear is installed on the output shaft, and the first bevel gears of the two roller position radial sliding output mechanisms are simultaneously meshed with the second bevel gear.

2. A novel continuously variable transmission device according to claim 1, Features: The second rolling torque transmitter includes a second ball retainer coaxially mounted on the input shaft. The second ball retainer is provided with a number of second balls in the circumferential direction. A number of second left V-grooves are formed on the right side surface of the third pressure plate. All the second left V-grooves are arranged in a circumferential array along the center line of the input shaft. The center line of the second left V-groove is in the radial direction of the input shaft. A number of second right V-grooves equal to and corresponding one by one to the second left V-grooves are formed on the left side surface of the second friction plate. The second balls are arranged inside the diamond-shaped space formed by the second left V-grooves and the second right V-grooves.

3. A novel continuously variable transmission device according to claim 2, characterized in that: First disc springs are provided on both the left and right sides of the first ball retainer. The first disc spring on the left is press-connected to the right side surface of the second pressure plate, and the first disc spring on the right is press-connected to the left side surface of the first pressure plate.

4. A novel continuously variable transmission device according to claim 2, characterized in that: Second disc springs are provided on both the left and right sides of the second ball retainer. The second disc spring on the left is press-connected to the right side surface of the third pressure plate, and the second disc spring on the right is press-connected to the left side surface of the second friction plate.

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