Hydrostatic differential

 

(57) Abstract:

Usage: in the energy industry, in particular, in the transmission of tracked and wheeled vehicles. The essence of the invention: differential case containing the bearings for accommodating the drive shaft and the two axes placed stator, connected gear with the drive shaft. The case has two hydroscape coupling with a common stator and two rotors connected to the axes, while the same cavity pressure between the rotor and the eccentric inner surface of the stator pipe connected to the valve. Other eponymous cavity piped through mounted on the housing kolovraty the variable displacement hydraulic pump driven by a separate shaft, and in pipelines installed dampers of oscillation of the working fluid pressure. The technical result - ensuring tight regulation of the difference of the angular speed of the mechanism regardless of the difference of the moments of resistance of these axes with maintaining an average speed of their rotation and with rotation axes in different directions with a stationary drive shaft. 2 Il.

The invention relates to ene is cinichnyh vehicles.

Known gear differentials with bevel gears with a mechanical locking mechanism that prevents their mutual cranking (U.S. patent N 3901102, CL F 16 H 1/38, F 16 H 1/42, 1975).

However, this device does not allow you to adjust the difference of angular velocities, which is necessary for tracked vehicles, and does not allow the difference in torque of the mechanism in the unlocked position.

Known gear differentials with a controlled deceleration of the axes with the help of clamping disks (U.S. patent N4679463, CL F 16 H 1/45, 1987).

This device also has disadvantages: the impossibility of a strict regulation of the difference of the angular velocities of the axes at different moments of resistance, the inability of the transmission axis of the moments of different sign (turn in place).

Description hydrostatic differentials in patent literature not found.

The objective of the invention is the provision of strict regulation of the difference of the angular speed of the mechanism regardless of the difference of the moments of resistance of these axes with maintaining an average speed of their rotation and with rotation axes in different directions with a stationary drive shaft, differentia the

This technical result is achieved due to the fact that the hydrostatic differential includes a housing with bearings to accommodate the drive shaft and the two axes, the teeth of the drive shaft with stator differential, and in the case of the differential has two hydroscape coupling with a common stator, stator differential, and two rotors connected to the axle shafts, the casing is installed kolovraty the variable displacement hydraulic pump driven by a separate shaft, with the said pump is provided with a safety valve, faucet and it has an intermediate part, which can be diametrically move, and the same cavity pressure hydroscopic coupling pipe connected to the crane, and others of the same cavity are connected by pipelines through kolovraty hydraulic pump, and in these pipelines installed dampers of oscillation of the working fluid pressure.

In Fig. 1 shows the General scheme of the differential of Fig.2 is a cross-section hydroscopic couplings and hydraulic pump with hydraulic connections.

Hydrostatic differential (Fig. 1) includes a housing 1 with the bearing assemblies to accommodate causee the gear 6, mounted on the shaft 2 and in contact with her gear 7 fixed on the rotating stator differential 5.

In the case of the differential has two hydroscape coupling with a common stator 5, which is the stator differential, and two rotors 8 and 9, which are connected with the axes 3 and 4 respectively. On the housing 1 has kolovraty the hydraulic pump 10 to the variable performance driven by a separate shaft 11. The input and output hydraulic line of the hydraulic pump 10 is connected with the mains of the stator 5 by pipes 12 and 13 with the stationary annular washer 14 with annular recesses 15 and the seal 16.

The pump 10 (Fig. 2) includes a housing 17 is placed inside the hollow rotor 18 rotating in the bearings 17 and connected to the shaft 11, is placed within the rotor can be freely moved in the diametrical direction of the shaft 19, which is fixed to the blades 20 are in contact with the rotor 18 through the liners 21.

Between the rotor 18 and the housing 17 is placed a cylindrical intermediate element 22 is moved in the diametrical direction of the guide 23 of the housing 17 by means of a rod 24. In the housing 17 is installed relief valve 25 and the valve 26, the connecting strips is freely moved in the diametrical direction of the shafts 27 and 28, with fixed blades 29 and 30 in contact with the rotors through the liners 31 and 32, respectively.

Same cavity 33 of the coupling axes (high or low pressure depending on the direction of rotation) are connected by a pipe 34 with the valve 35. Other eponymous cavity 36 of the coupling axes are connected by pipes 12 and 13 through the zones of high or low pressure 37 and 38 of the pump 10. In the pipes 12 and 13 installed dampers of oscillation of the working fluid pressure 39, simultaneously acting hydraulic lifters thermal expansion of the liquid in the pipe 12, the damper 39 not shown). The fluid due to leakage through the seal enters the cavity of the housing 1 and through the pipe with check valves enters the highway low pressure differential (not shown).

The device operates as follows. Possible 4 modes:

1) Valve 26 is closed, the valve 35 is open, the element 22 is neutral in alignment with the rotor and the inner cylindrical surface of the housing 17 position, the pump 10 operates as a locking valve cut, clutch coupled axes, the angular velocity of the axes are the same and do not depend on the difference of the moments of resistance of polyene rotor 18 of the pump 10 is pumped through pipelines 12 and 13, causing the rotors 8 and 9 to rotate relative to the stator in different directions, and with one direction of rotation of stator differential 5 axis 3 and 4 rotate at different speeds, if the resistance of the semi-axes are equal, then the torque on the control shaft 11 must be compensated only hydraulic and mechanical losses inside the device, since the pressure at the inlet and outlet of pump 10 will be equal to;

3) Valve 35 is closed, the differential is locked regardless of the position of the element 22 and valve 26 (when non-axial position of the element 22 is activated relief valve 25 while rotating the rotor 18 with the shaft 11);

4) Valves 35 and 26 are open device operates as a conventional toothed bevel differential, non-blocking, allowing for the free flow of fluids through pipelines 34, 12, 13, and the moments applied to the rotors 8 and 9 with the drive shaft 2, will be equal due to the equality of pressures in the cavities of the clutch regardless of the difference of the angular velocities of the axes.

Possible pressure pulsations in the device are smoothed out by the dampers 39.

The work and composition of the device does not change if the stator differential 5 will be divided into 2 parts, which will rotate with the Central displacement element 22 axis will rotate in different directions (turn in place).

Hydrostatic differential, comprising a housing with bearings to accommodate the drive shaft and the two axes, the teeth of the drive shaft with stator differential, characterized in that the housing of the differential has two hydroscape coupling with a common stator, stator differential, and two rotors connected to the axle shafts, the casing is installed kolovraty the variable displacement hydraulic pump driven by a separate shaft, with the said pump is provided with a safety valve, faucet and it has an intermediate part, which can be diametrically move, with the same cavity pressure hydroscopic coupling pipe connected to the valve, while others of the same cavity are connected by pipelines through kolovraty hydraulic pump, and in these pipelines installed dampers of oscillation of the working fluid pressure.

 

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FIELD: transport engineering; self-propelled wheeled vehicles.

SUBSTANCE: proposed vehicle contains frame 1 with cab 9, front and rear steerable wheels 4, 6 and middle wheels 5, engine placed behind the cab along vehicle and covered by hood 11. hydrostatic transmission contains pumping station 21 consisting of matching reduction gear driven by engine placed behind the cab, and three pumps connected by pipelines with hydraulic motors providing separate drives of wheels. Hydraulic motors are arranged along frame 1 between sidemembers on solid brackets made in form of boxes with flanges connected with wall of side member between its webs. Invention makes it possible to create ecologically clean and reliable multipurpose all-wheel-drive vehicle of high cross-country capacity with hydrostatic transmission to drive all wheels.

EFFECT: provision of convenient mounting and servicing of transmission units.

5 cl, 7 dwg

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