HYDROMECHANICAL DRIVE

Abstract: The hydromechanical drive consists of three main parts: hydraulic drive cylinders (2), a regulator and a gear box (6). In applying the drive cylinders (2) and the regulator these are showing a completely new principle deviating of all consisting drive systems. The principle of the drive is based on the controlling of the pressure which is built up by means of hydraulic cylinders. This controlling takes place by means of a hydraulic regulator. By means of a hydraulic pump with pressure regulator, always one of the two double acting cylinders is held at a constant pressure and the piston with rod present in it is pressed forwardly. When this is at the end of its run, one permits the second cylinder, taking over the pressure, to do the same. The piston assemblies are connected with racks (3) cooperating with cog wheels (4) which are driving a shaft (5) via ratching systems, characterized in that the speed control device (7) is formed by a set of two undulated wheels (8) coupled to the shaft via gear wheels, said undulated wheels (8) cooperating with rolls and pistons are taking care for flowing to and fro an amount of liquid between both cylinders (9), in which the flow velocity and by this the velocity of the system can be adjusted by means of a control valve. Between the shaft driven in this way and the set of undulated wheels a gear-transmission (6) is functioning by means of a gear box provided with a number of speed-stages.

Description: Hydromechanical drive. The invention relates to a hydromechanical drive: consisting of three main parts: hydraulic drive cylinders, a regulator and a gear box. In applying the drive cylinders and the regulator these are showing a completely new principle deviating of all consisting drive systems, by which a considerable reduction of the fossile fuel consumption is obtained. The hydromechanical drive is characterized by the simple, plain construction but proves its efficiency by realizing the high-yield result. In fact the principle on which this way of drive is based the best can be compared with the principle of a clockwork driven by a weight. The clockwork is functioning by the energy delivered by the weight, said energy (falling force) being controlled by a regulator (the pendulum) . Should one want to obtain in this way much workable residual energy, usable as driving energy, then one should have to deal with immen¬ sely heavy weights and a gigantic regulator. Now the falling force can be replaced by the pressure which in a simple way can be built up by means of a compact hydraulic cylinder. For controlling the gigantic pressure released by this one has to use a hydraulic regulator as described afterwards. The drive is directly. One of the drive cylinders is continuously held at a constant pressure by a hydraulic pump provided with a pressure regulator, needing a drive which can take place by means of a motor at choice. The power of this motor, which is needed, is at a minimum compared with the end result of the drive as a whole. The hydromechanical drive further is characterized by the fact that it is possible to create a varying torque-power by providing the output end with a greater, smaller, heavier or lighter end wheel while taking the execution of the gear box into account. For the invention the indication motor is knowingly avoided to prevent confusion with another hydraulic drive which is generally called hydromotor (hydraulic motor) , but the principle of which is based on a turbine (rotor) system and which by its character never can reach the ef- ficiency contemplated by this invention. Concerning this an important difference with the hydromotor is that the hydromotor can build up a hydraulic pressure but cannot maintain this long or may control this respectively as is the case with the present invention. The indications hydromechanical or hydrodynamical and drive or machine so are more suitable with this invention. The invention will be further elucidated by means of four drawings in which an embodiment is shown. Fig. 1: an outline of the total hydraulic drive. Fig. 2: a detail drawing of the regulator. Fig. 3: a detail drawing of the double acting cylinders with racks on piston rods. Fig. 4: the gear box in connection with the regulator. The first two figures are further indicated in the separate observations below while the other two figures can serve for explanation when they come under discussion during the further description as well in case of the claims. Fig. 1: A hydraulic pump (1) , being provided with a pressure regulator, always held one of the two double acting cylinders (2) at a constant pressure and is pressing forwardly the piston with rod present in it. When this is at the end of its run, one permits the second cylinder, taking over the pressure, to do the same and one brings the piston of the first cylinder back to its lowest position. By means of the cylinders which so are releaving each other the pistons with rod are pressed forwardly along a straight line and synchronously with these the racks (3) which are mounted on the piston rods. The racks, each cooperating with a pinion (4) being mounted on a shaft (5) by means of a ratched-system, so are converting the rectilinear movement into a rotating movement. The ratched-system is needed for making possible the downward movement of one of the racks returning to its initial position. The conversion of the rectilinear movement of the piston rod into a rotating movement needs not necessarily to take place by means of such a rack but can be reached also by various other methods. Of vital importance is that one has to be able to control the constant remaining pressure in the cylinders in a perfect and continuous way, so that the outward movement of the racks will take place in the desired and completely controlled way. The result has to deliver a desired speed of revolutions which can be varied and controlled. To reach this the shaft (5) , which has to be brought into a rotating movement, is coupled with a gear box (6) on which a regulator (balance) 7 is mounted. Apart from that of course transmissions can take place also in another way than by means of cog wheels. The transmissions in the gearing box (transmission box) can be such that one e.g. is satisfied by a quarter of a half stroke (revolution) per 24 hours at the beginning to reach at the end an acceptable result of e.g. between 10.000 and 15.000 revolutions per minute. Fig. 2: The regulator described by means of Fig. 1, the drive of which is here a gear wheel cooperating with a cog wheel of the gear box further consists of two undulated wheels (8) with two cylinders (9) oppositely mounted, the ends of the piston rods of these being provided with two rotors. As fig. 2 shows these two rotors (10) each are pressing against an undulated wheel (8) . The undulations of the undulated wheels are staggered. So when a wave top is standing in front of the one wheel, then a wave troug ■of; the other is standing in front. So the one rotor is pressing into a wave trough and the other against a wave top. The cylinders (9) are connected with one another by means of a controllable liquid-passage. When now pressure is applied onto one of the drive cylinders (2) and one opens the liquid passage between both cylinders (9) then the whole mechanism is going to work (rotate) . The rotor (10) resting in a trough of the undulated wheel (8) is forced away by a wave cam (top) and the piston connected to it by means of the piston rod is forced downwardly in the cylinder (9) . Then this piston is pressing the liquid through the connecting passage into the other cylinder by which the piston present in this is pressed forwardly and the rotor cooperating with this and which was standing on a wave top will come to land in a wave trough. After this the reverse happens and so it further goes alternately. By increasing or decreasing the passage-opening of the liquid-connection between both cylinders (9) one controls the drive cylinder (2) or, expressed in an¬ other way, one can control the outward-velocity of the drive cylinder and can adjust as desired the output speed fast and continuously.

Claims: - C l a i m s - 1. Hydromechanical drive provided with piston assemblies moving to and fro, connected with racks cooperating with cog wheels which are driving a shaft via ratching systems, characterized in that the speed control device is formed by a set of two undulated wheels coupled to the shaft via gear wheels, said undulated wheels cooperating with rolls and pistons are taking care for flowing to and fro an amount of liquid between both cylinders, in which the flow velocity and by this the velocity of the system can be adjusted by means of a control valve. 2. Hydromechanical drive according to claim 1, characterized in that a gear wheel transmission between shaft and a set of undulated wheels functions by means of a gear box provided with a number of speed-stages.

Inventors: MUIJLKENS ALOYSIUS ELISABETH M, MUIJLKENS, ALOYSIUS, ELISABETH, MARIA, ANTONIUS
Applicants: LIPS BARTHOLOMEUS MARIE, LIPS, BARTHOLOMEUS, MARIE
Application year: 1987
Main classification: F03C1
IPC codes: F03C1, F16H3