JP6998010B2 - Transmission system for continuously variable transmissions - Google Patents

Description

This application is a partial continuation of US Patent Application No. 14 / 859,302 filed September 20, 2015, the entire contents of which are incorporated herein by reference.

The present invention relates to a continuously variable transmission system for a vehicle, and in particular, an improved continuously variable transmission (CVT) having a simple structure that is more durable than a conventional continuously variable transmission and can generate high torque. ) Related to the transmission system.

In general, automatic transmissions provide a substantially stepless or stepless current gear ratio as a function of current or expected operating conditions (eg, partial load, thrust) and environmental parameters (eg, temperature, pressure and humidity). It is a modulation type converter that changes independently. Included in the group are modulation converters of the type selected from the group consisting of electric, pneumatic, hydrodynamic, hydrostatic or combinations thereof.

A continuously variable transmission (CVT) is on two shafts, a first shaft that receives torque from the prime mover, a second shaft that is parallel to or can be parallel to the first shaft. An adjustable pulley or sheave and a continuously variable member (eg, an endless flexible member) that wraps around two pulleys and transmits torque from the first shaft to the second shaft when the first shaft is driven by a prime mover. , Chain or belt, hereinafter referred to as "chain"), and generally include.
The two pulleys are adjustable and to achieve this purpose, each pulley is swivelable with a first conical flange fixed to the shaft and a first flange, the first flange. Includes a second conical flange that can be moved axially toward or away from the first flange. Adjustability of the pulley allows the chain to move one loop inward radially toward one of the shafts and the other loop outward radially away from (or or) the other shaft. The opposite is true).

A continuously variable transmission is preferable to an automatic transmission. It utilizes a fluid torque converter in combination with a so-called bypass or lockup clutch. The reason is that the continuously variable transmission can shift to a different gear ratio without impact, so that high comfort can be provided to the occupant or the occupant of the automobile. Moreover, the use of continuously variable transmissions in the powertrain can save a great deal of fuel for the vehicle.

However, due to the concept of "cone pulley" or the physical limitations of continuously variable transmissions that use belt / chain drive systems, conventional continuously variable transmissions are only used for low torque, for example in small passenger vehicles, light load machines, etc. could not. Further, the cone or belt / chain of the continuously variable transmission needs to be tensioned to generate sufficient friction in order to sufficiently transmit the force and suppress the slip. However, the energy used to maintain tension in the cones and belts / chains is another form of wasted energy, reducing overall efficiency.

Further, in the conventional continuously variable transmission, "lag time" occurs when the accelerator pedal is depressed to accelerate the automobile. This is because the acceleration is likely to be delayed and the torque is likely to be insufficient due to the physical limitation of the conventional continuously variable transmission system of the cone pulley or the belt / chain. In addition, the conventional continuously variable transmission has problems of noise, vibration, and harshness (NVH). Since the structure of the conventional continuously variable transmission is complicated, the reliability and durability are deteriorated. Therefore, in order to improve the above-mentioned problems, an improved transmission system has been required.

The first object of the present invention is an improvement that uses only gears and hydraulic pressure for power transmission and can be used in situations where various torques from low torque to high torque are required such as passenger large automobiles, heavy trucks, and high load machines. The purpose is to provide a transmission system for continuously variable transmissions.
A second object of the present invention is to use only gears and hydraulic pressure for power transmission, and to prevent the transmission from being "sliding" by being "sufficiently tense" and engaged without additional power. It is to provide a transmission system for an improved continuously variable transmission that improves the overall efficiency of power transmission.
A third object of the present invention is to use only gears and hydraulic pressure for power transmission, and to prevent lag time when accelerating by immediately performing power transmission, so that control, efficiency and safety of the transmission system can be prevented. The purpose is to provide a transmission system for an improved continuously variable transmission with improved performance.
A fourth object of the present invention is to use only gears and hydraulic pressure for power transmission, and to improve the drawbacks of noise, vibration and harshness (NVH) when the conventional continuously variable transmission accelerates. The purpose is to provide a transmission system for a continuously variable transmission.
A fifth object of the present invention is to provide a transmission system for an improved continuously variable transmission, which has excellent reliability and durability due to a simple structure and can significantly reduce manufacturing costs.
A sixth object of the present invention is a shift related to a continuously variable transmission that does not pollute the environment and can reduce energy consumption at any speed and state because it can be set to an optimum and effective gear ratio. It is to provide the system.
A seventh object of the present invention is a shift related to an improved continuously variable transmission that can be used in automobile competitions, mountain roads, etc. due to the ability to use only gears and hydraulic pressure for power transmission and to perform large acceleration in an instant. It is to provide the system.

In order to solve the above problems, according to the first aspect of the present invention, there is a speed change system for a stepless transmission including a power input assembly, a power output assembly, a color assembly and a connection assembly, wherein the power input is provided. The assembly comprises a power source, a hydraulic power transmission system, a main rotating shaft and an adjustable gear assembly, wherein the power output assembly is connected to a first gear via a first shaft. It has a wheel, a second freewheel connected to a second gear via a second shaft, a main rod, an output gear, and an output shaft, and the first freewheel is the said. The second freewheel is engaged with a main rod rack provided at the bottom of the main rod, while the collar assembly is the main. It has a sliding collar that is slidable on a axis of rotation and pivotally attached to the adjustable gear assembly, wherein the connecting assembly has a swivel arm and a plurality of slidings connected to the adjustable gear assembly. The hydraulic power transmission system in the power input assembly has a sleeve and a crank pin pivoted to a connecting rod pivoted to the main rod and extended from the swivel arm, from which the hydraulic positioning system extends. It has at least one hydraulic cylinder with a rod, the other end of the hydraulic positioning rod is connected to an end plate that controls the movement of the adjustable gear assembly, and the adjustable gear assembly is the said on one end. It is pivotally attached to the upper part of the sliding collar, and is pivotally attached to the first stretcher pivotally attached to the sliding sleeve provided on the upper part of the swivel arm and to the lower part of the sliding collar on one end. Together with a second stretcher pivotally attached to the sliding sleeve provided at the bottom of the swivel arm, the swivel arm swivels along the circumference of the connecting rod and the main rod. Drives the first gear, the second gear and the output gear, and the speed and hydraulic pressure supplied by the improved stepless transmission are the first stretcher and the second on the swivel arm. A speed change system for a stepless transmission is provided, which is characterized by being controllable by the distance between stretchers.

It is preferable that the first freewheel and the second freewheel are rack-pinion-type engaged with the main rod rack of the main rod.

The power input assembly preferably has an input shaft that extends from the power source and is connected to an input gear and engaged with a reducer.

It is preferable that the main rotation shaft is driven by the speed reducer.

When the hydraulic cylinder moves toward the swivel arm, the end plate is pushed by the hydraulic positioning rod to further push the sliding collar toward the swivel arm, and the upper and lower parts of the sliding collar are pushed. It is preferable that the first stretcher and the second stretcher pivotally attached to the sliding sleeve ascend and descend on the swivel arm, respectively, to increase the spacing distance, similarly to the upper part and the lower part of the sliding sleeve.

It is preferred that when the hydraulic cylinder pulls the end plate and the sliding collar away from the swivel arm, the first stretcher and the second stretcher move on the swivel arm and approach each other.

The speed change system related to the continuously variable transmission of the present invention is superior in durability to the conventional continuously variable transmission and can generate high torque.

It is a perspective view which shows the shifting system which concerns on a continuously variable transmission which concerns on one Embodiment of this invention. FIG. 3 is a perspective view showing a power output assembly of a transmission system for a continuously variable transmission according to an embodiment of the present invention. It is explanatory drawing which shows the main rod and freewheel of the power output assembly of the transmission system concerning the continuously variable transmission which concerns on one Embodiment of this invention. It is explanatory drawing which shows the 1st gear, the 2nd gear and the output gear of the power output assembly of the transmission system concerning the continuously variable transmission which concerns on one Embodiment of this invention. It is an exploded perspective view which shows the color assembly of the transmission system about the continuously variable transmission which concerns on one Embodiment of this invention. FIG. 3 is a perspective view showing a power input assembly that achieves high speed and low torque when the stretcher is opened on the swivel arm. FIG. 3 is a perspective view showing a power input assembly that achieves high torque and low speed as the stretchers move towards each other on the swivel arm. It is a perspective view which shows the parameter R in the transmission system about the continuously variable transmission which concerns on one Embodiment of this invention. It is a perspective view which shows the state which the turning arm of the speed change system which concerns on a continuously variable transmission which concerns on one Embodiment of this invention is parallel to a connection rod. It is a perspective view which shows the state when the turning arm of the speed change system which concerns on a continuously variable transmission which concerns on one Embodiment of this invention turns and becomes parallel with a connection rod. The speed change system for a continuously variable transmission according to an embodiment of the present invention is a perspective view showing a state when the turning arm of FIG. 9 turns 180 degrees. The speed change system for a continuously variable transmission according to an embodiment of the present invention is a perspective view showing a state when the turning arm of FIG. 9 turns 270 degrees.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that this does not limit the present invention.

1 to 3 are referred to. As shown in FIGS. 1 to 3, the speed change system for the continuously variable transmission according to the embodiment of the present invention includes a power output assembly 100, a power input assembly 200, a color assembly 300, a power output assembly 100, and a power . It may include a connection assembly 400 connected to an input assembly 200. The speed change system of this embodiment relates to a continuously variable transmission (CVT).
The power output assembly 100 has a first freewheel 1 coupled to a first gear 3 via a first shaft 7 and a second freewheel coupled to a second gear 4 via a second shaft 8. Includes wheel 2 and. In this embodiment, the first freewheel 1 is engaged with the main rod rack 10 on the top of the main rod 9, while the second freewheel 2 is the main rod rack 10 on the bottom of the main rod 9. Engage in.

Since the main rod 9 is pivotally attached to the connecting rod 11 via the pivot hinge 13 to form the shaft support mechanism 12, the power generated by the power input assembly 200 transfers the connecting rod 11 via the connecting assembly 400. Used to drive. In the present embodiment, the main rod 9 moves in the direction 15 (see FIGS. 1 to 3), and the main rod 9 is rack-pinion-operated with the first freewheel 1 and the second freewheel 2. Will be combined. On the other hand, the second freewheel 2 is rotated clockwise by the second shaft 8 together with the second gear 4, and the second gear 4 is engaged with at least one output gear 5 having the output shaft 6. , The output gear 5 is rotated counterclockwise.
The output gear 5 is also engaged with the first gear 3 and rotates the first gear 3 clockwise in the same manner as the first freewheel 1. However, when the main rod 9 moves in the direction 15, the first freewheel 1 is rotated counterclockwise. Since the rotation of the two different momentums in different directions is synchronously applied to the first freewheel 1, the first freewheel 1 may be in an idling state. Here, the main rod 9 is configured to slide together with the plurality of pulleys 31 along the rails 17 on each side portion of the main rod 9.

In another embodiment, the main rod 9 moves in direction 14 (see FIGS. 1 to 3), and the main rod rack 10 is rack and pinion type with the first freewheel 1 and the second freewheel 2. Engaged. At this stage, the first freewheel 1 is rotated clockwise by the first shaft 7 like the first gear 3, and the first gear 3 has at least one output gear 5 output together with the output shaft 6. The gear 5 is configured to rotate counterclockwise.
The output gear 5 is also engaged with the second gear 4 and rotates the second gear 4 clockwise in the same manner as the second freewheel 2. However, when the main rod 9 moves in the direction 14, the second freewheel 2 is rotated counterclockwise. Since the rotation of the two different momentums in different directions is synchronously applied to the second freewheel 2, the second freewheel 2 may be in an idling state.

Here, regardless of the traveling direction of the main rod 9, the first gear 3 and the second gear 4 always rotate clockwise, and the output gear 5 always rotates counterclockwise (see FIG. 4). .. The power may be rotated counterclockwise by the output shaft 6.

See FIG. 1 again. The power input assembly 200 may include an input gear 29, an input shaft 30, and a power source 40. In this embodiment, the input gear 29 is engaged with the speed reducer 28. One end of the main rotation shaft 21 is inserted into the center of the speed reducer 28, and the other end is connected to the swivel arm 18. Therefore, the swivel arm 18 is driven by the speed reducer 28 via the main rotary shaft 21.

The power input assembly 200 may include a hydraulic cylinder 27 coupled to the hydraulic positioning rod 22, the movement of the hydraulic cylinder 27 is controlled by the control unit 33, and the hydraulic positioning rod 22 is connected to the end plate 25. As shown in FIG. 5, the power input assembly 200 may have a color assembly 300. This may include a front collar 26, a middle collar 34, a back collar 35 and a sliding collar 36.
The sliding collar 36 is configured to slide and rotate on the main rotation shaft 21, and both the front collar 26 and the back collar 35 are coupled to the sliding collar 36, so that the three collars 26, The 35 and 36 rotate on the main rotation shaft 21 as one unit. Here, the middle collar 34 is a non-swivel collar, is installed between the front collar 26 and the back collar 35, and the middle collar 34 may be slid on the main rotation shaft 21. Since the middle collar 34 is connected to the end plate 25 moved by the hydraulic cylinder 27, the sliding collar 36 is configured to slide back and forth on the main rotation shaft 21.

The power input assembly 200 has a first stretcher 19 connected to the upper flange 24'on one end (on the sliding sleeve 20) and connected to the upper 24 of the sliding collar 36 on the other end, and one end (sliding). It may include a second stretcher 19', which is connected to the lower flange 23'on the moving sleeve 20') and is connected to the lower portion 23 of the sliding collar 36 on the other end.
In this embodiment, the stretchers 19, 19'are formed into a V-shaped structure (see FIG. 1). In another embodiment, the power input assembly 200 may include a pump 39 that supplies oil to the hydraulic cylinder 27 and the control unit 33 via the hydraulic pipes 32, 38.

In an exemplary embodiment, when the hydraulic cylinder 27 moves towards the swivel arm 18, the hydraulic positioning rod 22 pushes the end plate 25 and further pushes the sliding collar 36 towards the swivel arm 18. On the other hand, the stretchers 19 and 19'are pivotally attached to the upper 24 and the lower 23 of the sliding collar 36 as well as the upper and lower portions of the flanges 24' and 23', and the sliding sleeves 20 and 20'are on the swivel arm 18. Ascends or descends at (see FIG. 6). At this stage, the distance between the stretchers 19, 19'on the swivel arm 18 increases. This is similar to the "upshift" of a vehicle transmission that is fast and has low torque.

On the other hand, when the hydraulic cylinder 27 pulls the end plate 25 away from the swivel arm 18, the sliding collar 36 is also pulled back from the swivel arm 18, and the stretchers 19, 19'are moved on the swivel arm 18 to approach each other (see FIG. 7). do). At this stage, the distance between the stretchers 19 and 19'on the swivel arm 18 is shortened. This is similar to the "downshift" of low speed, high torque vehicle transmissions.

See FIG. As shown in FIG. 8, the parameter _R is defined as _RX / RO. _RX is a variable representing the distance between the middle portion of the swivel arm 18 and the upper part (or lower part) of the flange, and _RO is the radius of the first freewheel 1 or the second freewheel 2. As described above, when the hydraulic cylinder 27 moves to the swivel arm 18, the distances of the stretchers 19 and 19'on the swivel arm 18 increase. That is, _RX increases (see FIG. 8). Assuming that RO is a constant, the larger the parameter _R , the higher the speed and the lower the torque of the transmission. On the contrary, the smaller the parameter R, the lower the speed and the higher the torque of the transmission.

The connection assembly 400 extends from the opposite side of the swivel arm 18, the upper flange 24'on the sliding sleeve 20, the lower flange 23'on the sliding sleeve 20', the balance pin 37, and the upper flange 24'. The crank pin 16 may be included. Since the crankpin 16 is pivotally attached to the connecting rod 11, the power generated by the power input assembly 200 is transmitted to the power output assembly 100.

9 to 12 show how power is transmitted from the power input assembly 200 to the power output assembly 100 by the improved continuously variable transmission. The swivel arm 18 starts at 0 degrees parallel to the connecting rod 11 and when power-on starts at the power input assembly 200, the main rotation shaft 21 is driven and becomes perpendicular to the main rotation shaft 21. When the swivel arm 18 is swiveled 90 degrees and then swiveled to 180 degrees and 270 degrees, all operation shift cycles are completed.
In the operation shift cycle, the connecting rod 11 moves the main rod 9 to drive the freewheels 1 and 2, and further drives the output gear 5 and the output shaft 6 described above.

The speed change system related to the continuously variable transmission of the present invention is preferable to the conventional continuously variable transmission because it uses only gears and hydraulic pressure for power transmission. More specifically, the speed and torque can be controlled by the stretchers 19, 19', which can be opened on the swivel arm 18 controlled by the hydraulic cylinder 27, without the need for additional power. , The transmission can be "sufficiently tense", prevented from "sliding", and the overall efficiency of power transmission can be improved.

Suitable embodiments of the present invention have been disclosed as described above so that those familiar with the art in the art can understand, but these are by no means limiting the invention. Various changes and modifications can be made without departing from the gist and domain of the present invention. Therefore, the scope of claims of the present invention should be broadly construed including such changes and amendments.

1 1st freewheel 2 2nd freewheel 3 1st gear 4 2nd gear 5 Output gear 6 Output shaft 7 1st shaft 8 2nd shaft 9 Main rod 10 Main rod rack 11 Connection rod 12 shaft Support mechanism 13 Pivot hinge 14 Direction 15 Direction 16 Crank pin 17 Rail 18 Swivel arm 19 Stretcher 19'Stretcher 20 Sliding sleeve 20'Sliding sleeve 21 Main rotating shaft 22 Hydraulic positioning rod 23 Lower 23'Lower flange 24 Upper 24 'Upper flange 25 End plate 26 Front collar 27 Hydraulic cylinder 28 Reducer 29 Input gear 30 Input shaft 31 Pulley 32 Hydraulic pipe 33 Control unit 34 Middle collar 35 Back collar 36 Sliding collar 37 Balance pin 38 Hydraulic pipe 39 Pump 40 Power source 100 Power Output Assembly 200 Power Input Assembly 300 Color Assembly 400 Connection Assembly

Claims (6)

A continuously variable transmission transmission system with a power input assembly, a power output assembly, a color assembly and a connection assembly.
The power input assembly comprises a power source, a hydraulic power transmission system, a main rotating shaft and an adjustable gear assembly.
The power output assembly includes a first freewheel connected to a first gear via a first shaft and a second freewheel connected to a second gear via a second shaft. It has a main rod, an output gear, and an output shaft, the first freewheel is engaged with a main rod rack provided above the main rod, while the second freewheel is , Engaged in a main rod rack provided at the bottom of the main rod,
The collar assembly has a sliding collar that is slidable on the main axis of rotation and pivotally attached to the adjustable gear assembly.
The connecting assembly includes a swivel arm, a plurality of sliding sleeves connected to the adjustable gear assembly, and a crank pin pivoted to a connecting rod pivoted to the main rod and extended from the swivel arm. Have,
The hydraulic power transmission system in the power input assembly has at least one hydraulic cylinder having a hydraulic positioning rod extending from it, the other end of the hydraulic positioning rod controlling the movement of the adjustable gear assembly. Connected to the end plate
The adjustable gear assembly is pivotally attached to the top of the sliding collar on one end and to a first stretcher pivoted to the sliding sleeve provided on the top of the swivel arm and on one end. A second stretcher pivotally attached to the lower portion of the sliding collar and pivotally attached to the sliding sleeve provided in the lower portion of the swivel arm.
The swivel arm swivels along its circumference and is driven by the connecting rod and the main rod to drive the first gear, the second gear and the output gear, provided by an improved continuously variable transmission. The speed and torque can be controlled by the distance between the first stretcher and the second stretcher on the swivel arm.
A transmission system for continuously variable transmissions. The speed change system according to claim 1, wherein the first freewheel and the second freewheel are rack-pinion-type engaged with the main rod rack of the main rod. .. The speed change system for a continuously variable transmission according to claim 1, wherein the power input assembly extends from the power source and has an input shaft connected to an input gear and engaged with a speed reducer. The speed change system for a continuously variable transmission according to claim 3, wherein the main rotating shaft is driven by the speed reducer. When the hydraulic cylinder moves toward the swivel arm, the hydraulic positioning rod pushes the end plate, further pushes the sliding collar toward the swivel arm, and the upper and lower parts of the sliding collar. The first stretcher and the second stretcher pivotally attached to the sliding sleeve are characterized in that, like the upper part and the lower part of the sliding sleeve, they rise and fall on the swivel arm, respectively, to increase the spacing distance. The speed change system for the continuously variable transmission according to claim 1. Claim 1 characterized in that when the hydraulic cylinder pulls the end plate and the sliding collar away from the swivel arm, the first stretcher and the second stretcher move on the swivel arm and approach each other. Transmission system for continuously variable transmissions described in.

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