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Hydraulic transmission device allowing relatively quiet coupling

A technology of hydraulic transmission and equipment, which is applied in the direction of mechanical equipment, transmission device control, power device, etc., and can solve the problems of motor fluid tightness reduction and motor damage

Active Publication Date: 2013-02-13
POCLAIN HYDRAULICS IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, this engagement results in pressure peaks which are superimposed on the
Thus, during those pressure peaks, the pressure in the housing can damage the motor's gaskets and cause the motor to become less fluid-tight

Method used

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  • Hydraulic transmission device allowing relatively quiet coupling
  • Hydraulic transmission device allowing relatively quiet coupling
  • Hydraulic transmission device allowing relatively quiet coupling

Examples

Experimental program
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Effect test

Embodiment Construction

[0067] Figure 1A A vehicle 10 is shown in which the device 20 of the invention is installed.

[0068] The vehicle 10 is a four-wheeled vehicle, namely two rear wheels 12A, 12B and two front wheels 14A, 14B. Under normal conditions, drive for the vehicle is provided by the main transmission 16 . The main transmission comprises a diesel engine 18 which is connected to the rear wheels 12A and 12B and which normally provides drive for the vehicle.

[0069] In addition, the vehicle has an auxiliary transmission 20 in order to drive the vehicle under difficult road conditions (slope road, slippery road, etc.). Said secondary transmission enables the two wheels 14A and 14B to be driven even though they are not normally driven. Thus, by means of the secondary transmission 20, the vehicle has an auxiliary mode in which all four wheels 12A, 12B, 14A and 14B are driven wheels.

[0070] Auxiliary transmission 20 is coupled to shaft 21 which is connected to a power output from engine 1...

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PUM

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Abstract

The hydraulic transmission device (10, 210, 310, 410, 510) comprises at least one disengageable hydraulic motor (26A, 26B) of the radial pistons type, which is connected by two motor pipes (30, 32, 302A, 322A) and one casing pipe (40, 240) connected to the inside of the casing. The device comprises coupling means capable, in order to couple the motor, of raising a first (322A) of the motor pipes to a coupling pressure greater than the pressure in the casing while at the same time allowing fluid to leave via the casing pipe. The device comprises, positioned on the casing pipe, means (82, 282, 382, 482, 582) for limiting the circulation of fluid through this pipe, so as to cause an increase in the pressure in the casing during coupling. This device allows for gentle coupling.

Description

technical field [0001] The invention relates to a hydraulic transmission device comprising at least one hydraulic motor with radial pistons, said motor comprising: [0002] case; [0003] a cylinder block inside the housing, comprising a plurality of cylinders, each cylinder containing a slidably mounted piston and each cylinder being disposed radially with respect to the axis of rotation of the motor; and [0004] wave cams for these pistons; [0005] The device also includes: [0006] two motor tubes for fluid supply and fluid discharge to the motor respectively, said motor tubes being adapted to be in communication with said cylinder; and [0007] a housing tube, connected to an interior space provided inside the housing, and in which "casing pressure" exists; the motor is adapted to be engaged, in which state the piston remains in contact with the cam while slides in the cylinder, and the motor is adapted to produce an output torque under the action of the pressure dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03C1/04B60K23/08B60K17/356B60K17/26F16H61/4035F16H61/4183F16H61/4043F16H61/44
CPCB60K7/0015F03C1/0478B60K23/08F16H61/4035F16H61/439B60K17/356F01C21/008F16H61/4183F03C1/047
Inventor 安德烈·普里让朱利恩·朗贝
Owner POCLAIN HYDRAULICS IND
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