JP2009052722A - Stepless reduction gear based on hydraulic pressure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems of conventional devices for speed control such as an automatic gear change, toroidal CVT, etc., for an automobile, for example, that the automatic gear change has large weight and gear friction, and gives a shock at the time of acceleration when the gears are decreased in number, and that the toroidal CVT is unusable for large vehicles due to its mechanical structure. <P>SOLUTION: For the third speed control system, hydraulic pressure is used, and a pump and a motor are combined in a set, in such a way that the capacity of the pump is varied to adjust the rotation of the motor. The pump and the motor are shaped semispherical, and covered with a spherical cover to rotate around a wheel track as a rotating pump. By thus varying the contact angle to the hemispherical faces, the capacity of the pump can be adjusted. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a machine requiring a reduction in speed such as a hydraulic actuator, a ship, an electric vehicle, a bicycle, as well as a large vehicle.

In the case of a hydraulic press, the animal pressure tank is pressurized with hydraulic oil supplied by a pump, and the piston shaft is moved by the movement of the hydraulic oil.

In automobiles, gear reduction is the mainstream, and wheel-to-belt reduction gears and in recent years, toroidal CVTs are used as vehicle reduction gears.

Reducers other than toroidal CVTs have large mechanical friction and large energy loss.

The toroidal C VT is vulnerable to impurities contained in the oil due to the structure of the machine and has a limit to the load.
JP-A-11-303969 JP 2004-68933 A

The problem to be solved is that it is difficult to improve the transmission efficiency and easily transmit large output power to the output side, and to make it a continuously variable speed reducer from a huge vehicle to a bicycle at the design stage.

In order to reduce the speed mechanically, the friction surface was uneven and the speed reducer was damaged.

The present invention starts with a combination of a hydraulic pump and a hydraulic motor, but the problem of frictional surfaces cannot be overcome by using conventional pumps.

The condition for enabling the continuously variable reduction gear is to transmit a different number of rotations from the input side rotary shaft to the output side rotary shaft. For this purpose, a catalyst that is equivalent to a catalyst in a chemical reaction is necessary.

The friction surface must be stationary to avoid mechanical damage. Therefore, the friction surface (between 6 and 5 in FIG. 1) and the belt surface (between 1 and 5 in FIG. 2) were separated, and only the belt surface was movable to provide durability.

Next, the process will be described with reference to the drawings. The main body has a pump part and a motor part, and one pump container has a spherical shape.

The rotary shaft on the 3 pump side and the rotary shaft on the 11 motor side are in a straight line and are fixed to 10 bearings.

The shape itself is the same for both the pump and the motor, but in order to change the pump capacity on the pump side, the 6 movable separation bands are fixed to the 9 pump capacity increase / decrease setting panel fixed shaft and 20 hydraulic pistons or pinion gears etc. Change the angle with. Therefore, the interval between the top dead center and the bottom dead center of the piston is changed to change the pump capacity.

The pump consists of a rotor for installing 4 hydraulic pump piston compartment walls, 5 piston compartment walls, and 8 central spheres installed on 3 shafts with a rotary pump.

The sliding surface in question is the friction surface between the pump capacity setting panel of 6 and the piston chamber wall of 5; however, even if the pump capacity is changed, the friction surface does not change and the friction surface is not locally worn. .

The friction surface of the 5 piston compartment wall between the pump container 1 and the center sphere 8 is the friction surface of the seal installation surface only, and wear damage is extremely small.

As described above, durability is improved by using a smooth surface having a large friction as a stationary area and a smooth surface having a small friction.

It must be a movable dead point where the reciprocating motion power changes in the rotational direction, which is an advantage of the fully rotating piston, generated from the power shaft and the virtual rotating shaft of the 5 piston compartment walls.

By integrating the hydraulic pump and motor, the pump effect and suction effect can also be used as power.

In addition, the braking action using engine brakes instead of anti-lock brakes can be expected from the advantage of complete sealing. It can also be applied to forced differentials, new engines, and compressors.

When used in an automobile, zero start can be performed regardless of engine rotation, which is the greatest feature of the present invention.

Moreover, since the pressure in the pump is zero at the time of stop, an auto-lock system is possible, and the mistake of forgetting to apply the side brake can be eliminated.

In particular, since the present invention can be used for a huge vehicle, a load on the engine at the time of starting the vehicle hardly occurs.

Heat generation can be suppressed by cooling the pump container or circulating hydraulic oil to the heat exchanger.

Outline front view of the present invention Outline side view of the present invention

Explanation of symbols

1 Pump container
2 Pump base
3 Power input shaft
4 Hydraulic pump piston rotor wall installation rotor
5 Piston partition wall
6 Pump capacity increase / decrease setting panel
7 Movable separation wall
8 central sphere,
9 Pump capacity increase / decrease setting panel fixed axis
10 bearings
11 Power output shaft
12 Rotor for hydraulic motor piston partition wall installation
13 movable separation wall
14 Hydraulic motor capacity setting panel
15 Hydraulic oil guide hole
16 Hydraulic pump hydraulic oil guide groove
17 Hydraulic motor hydraulic oil guide hole
18 Hydraulic motor hydraulic oil guide hole
19 Hydraulic motor hydraulic oil guide hole
20 Hydraulic cylinder for moving pump capacity setting panel
21 Play for movable separation wall slide

Claims (5)

A hydraulic continuously variable speed reducer that uses a hydraulic pump and a hydraulic motor as a set to freely change the capacity of the hydraulic pump to increase or decrease the rotational speed of the hydraulic motor. 2. The hydraulic continuously variable reduction gear according to claim 1, wherein the capacity of the hydraulic pump is changed by changing an angle of a surface of the pump container that intersects at right angles to the rotation axis. 3. The hydraulic continuously variable speed reducer according to claim 2, wherein the hydraulic motor and the hydraulic pump are built in a hollow spherical container. 4. The hydraulic stepless speed reducer according to claim 3, wherein each of the hydraulic motor and the hydraulic pump is a rotary pump including a rotary shaft directly connected to the rotor and a partition wall rotated by a virtual rotary shaft. 5. The hydraulic continuously variable reduction gear according to claim 4, wherein a movable partition wall passing through a top dead center and a bottom dead center is provided in an intermediate zone between the hydraulic pump and the hydraulic motor to circulate the hydraulic oil of the pump and the motor.