Hydraulic speed reducing device

Abstract

The invention discloses a hydraulic speed reducing device. The hydraulic speed reducing device comprises a shell, a first rotating shaft, and a rotor impeller, a stator impeller, a second rotating shaft and a speed adjusting mechanism integrated in the shell; a working cavity is formed between the rotor impeller and the stator impeller; the second rotating shaft is connected with the rotor impeller; the first rotating shaft is connected with the second rotating shaft through the speed adjusting mechanism; one end of the first rotating shaft is connected with an output shaft of a vehicle gearbox, and the opposite end is connected with an input shaft of a vehicle drive axle; or one end of the first rotating shaft is directly connected with the input shaft of the vehicle drive axle. The speedadjusting mechanism is integrated in the shell of the hydraulic speed reducing device to achieve the speed adjusting function; and meanwhile, through change of the mounting mode, the speed adjustingmechanism can be independently mounted on a vehicle girder without improving the structure of the vehicle gearbox to achieve the advantage of flexible installation.

Description

technical field [0001] The invention relates to the technical field of hydraulic machinery, in particular to a hydraulic deceleration device installed between a vehicle gearbox and a vehicle drive axle. Background technique [0002] For vehicles with high speed and heavy loads, and vehicles requiring short braking distance and quick response, traditional mechanical friction brakes alone cannot meet people's requirements for vehicle safety, and hydraulic retarders can safely and reliably assist vehicle braking. To make the vehicle meet the safety requirements, therefore, it is widely used in vehicles. [0003] The hydraulic reducer is a device that converts mechanical energy into liquid heat energy and has low wear and tear. It is composed of a rotor impeller, a stator impeller, and a rapid liquid filling and discharging mechanism. A working chamber is formed between the rotor impeller and the stator impeller. When working, the rotor impeller is driven by the transmission sy...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the hydraulic retarder usually does not have a speed regulating function, that is, the rotational speed of the rotor impeller is consistent with the rotational speed of the vehicle transmission shaft. For example, Chinese patent CN 105757214A discloses a hydraulic retarder, which includes a rotor impeller The working chamber, oil storage pool, heat dissipation mechanism and transmission shaft formed by the stator impeller, the vehicle drives the rotor impeller to rotate through the transmission shaft, the speed of the rotor impeller is consistent with the speed of the transmission shaft, and the braking torque of the hydraulic reducer is braking When the torque coefficient, working fluid density, gravity acceleration and effective diameter of the circulation circle are kept constant, it is usually proportional to the square of the rotation speed of the rotor impeller. , the braking torque generated by the hydraulic retarder is also small, which makes the deceleration and braking effect of the hydraulic retarder on the vehicle weaker, which cannot meet the actual use requirements; or when the vehicle is running at high speed, due to the increase in the speed of the rotor impeller , making the idling loss of the hydraulic reducer correspondingly larger

[0005] In addition, in the prior art, the structure of the vehicle gearbox needs to be changed during the installation process of the hydraulic reducer, so as to realize the connection with the vehicle gearbox, but the above installation method destroys the structure of the transmission and at the same time makes the overall device take up a lot of space , poor installation flexibility, narrow scope of application

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