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Hydraulic infinitely-variable speed transmission device

A technology of hydraulic stepless transmission and transmission, which is applied in transmission control, components with teeth, belts/chains/gears, etc. It can solve the problems of high manufacturing precision of hydraulic components, narrow high-efficiency range, and low transmission efficiency. , to achieve the effect of improving work reliability, improving transmission efficiency and reliable connection

Pending Publication Date: 2019-07-30
钟彪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydraulic type is the hydraulic torque converter. In addition to the role of the clutch, it also has the ability to continuously change the speed and torque. It can make the vehicle start smoothly, accelerate softly, have good vibration damping performance, and can handle external loads It has good automatic adjustment and adaptability, but its disadvantages are complex structure, high cost, low transmission efficiency and narrow range of high efficiency
Due to the characteristics of wide-range controllable stepless speed regulation and high power density, hydraulic transmission has been paid more and more attention in the research of vehicle transmission. However, in the development of vehicle hydraulic transmission, there are problems such as low transmission efficiency, high manufacturing precision of hydraulic components, High cost, reliability of hydraulic components, etc.

Method used

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  • Hydraulic infinitely-variable speed transmission device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] like Figure 1-9 Shown is one of the embodiments of the hydraulic continuously variable transmission device of the present invention. In the preferred embodiment shown, the hydraulic continuously variable transmission device includes a sliding plate axial piston pump 1, a The disc axial piston pump 1 is coaxially arranged with the sliding disc axial piston motor 2 and the end seat 33 sandwiched between the sliding disc axial piston pump 1 and the sliding disc axial piston motor 2 , the sliding plate axial piston pump 1 and the sliding plate axial piston motor 2 are through-shaft structures, and the sliding plate axial piston pump 1 and the sliding plate axial piston motor 2 are connected by bolts The end seat 33 is fixed to form a three-body structure.

[0046] For the sliding plate type axial piston pump 1, it includes a distribution sliding plate subassembly, which includes a pump swash plate 40 and a pump sliding plate 50 supported on the pump swash plate 40. The s...

Embodiment 2

[0069] like Figure 10-16 As shown, the main difference from Embodiment 1 is that the outer peripheral portion of the sliding plate 50 / 150 is provided with a third bearing 23 / 123 for support, and the outer peripheral portion of the swash plate is provided with a support stop portion 41a / 141a. A third bearing 23 / 123 is interposed between the inner sides of the support stop portions 41a / 141a, and the sliding plate 50 / 150 is supported on the third bearing 23 / 123 in a radially constrained state. The third bearing 23 / 123 may be set to include but not limited to one of a radial thrust ball bearing, a needle roller bearing, a cylindrical roller bearing, a tapered roller bearing, and a radial ball bearing.

[0070] During the operation of the hydraulic continuously variable transmission device, the plunger 70 / 170 in the high-pressure area is subjected to the high-pressure oil pressure of the plunger hole 81 / 181 of the cylinder body, and exerts a close pressure on the sliding plate 50 / ...

Embodiment 3

[0078] like Figure 13 As shown, the main difference from other embodiments is that a flow distribution plate 90 / 190 is sandwiched between the sliding plate 50 / 150 and the swash plate 40 / 140 in the sliding plate pair, and the static pressure bearing surface 51 / 151 is supported on the flow distribution On the plate 90 / 190 and maintain a sliding fit with the distribution plate 90 / 190, the flow plate is fixed on the swash plate by means of pins or the like. The advantage of interposing the flow distribution plate 90 / 190 between the sliding plate 50 / 150 and the swash plate 40 / 140 is that it is easier and less expensive to replace the flow distribution plate later than to replace the swash plate.

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Abstract

The invention discloses a hydraulic infinitely-variable speed transmission device which comprises a sliding disc type axial piston pump, a sliding disc type axial piston motor coaxially arranged together with the sliding disc type axial piston pump and an end seat clamped between the sliding disc type axial piston pump and the sliding disc type axial piston motor. The sliding disc type axial piston pump and the sliding disc type axial piston motor each comprises a flow distribution sliding disc pair assembly, the flow distribution sliding disc pair assembly comprises swash discs and sliding discs supported on the swash discs, each sliding disc is of an integrated structure, the swash discs are provided with flow distribution oil grooves and are supported on the common end seat, the end seat is provided with an oil way for communicating the pump and the motor and oil inlet and outlet ports, low-pressure oil forms high-pressure oil through the effect of the sliding disc type axial pistonpump to be input into the sliding disc type axial piston motor through the oil way of the end seat, the low-pressure oil is formed under the action of the motor, and transmission is formed. The hydraulic infinitely-variable speed transmission device improves the working reliability and prolongs the working life.

Description

Background technique [0001] CVT can be divided into three types according to the difference of operation mode and transmission form: mechanical type, electric type and fluid type. Each of the three speed change transmission modes has its own advantages and disadvantages. [0002] The mechanical continuously variable transmission relies on the friction between the rotating bodies to transmit power. At present, the belt transmission type that relies on the friction between the belt or chain and the pulley to transmit power is more widely used. Its efficiency and service life are still to be determined. Progress has improved and cannot meet the requirements of high-power vehicles. The electric drive type continuously variable transmission has the advantages of large transmission power range, easy control, and high transmission efficiency, but due to its large mass and high cost, the controller has a complicated structure. The fluid type continuously variable transmission is main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/30
CPCF16H61/30
Inventor 钟彪
Owner 钟彪
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