Boom machine working implement gravity balancing device (variants)

FIELD: boom earth-shifting, mining, construction and other cyclic handling machinery provided with wheels or caterpillars.

SUBSTANCE: balancing device comprises working implement, main hydraulic cylinder and balancing pneumohydrocylinder. The pneumohydrocylinder includes piston cavity communicated with gas cylinder. Device also has working liquid distribution means, hydraulic pump provided with parallel main hydraulic cylinder and pneumohydrocylinder installed in the hydraulic pump and brought together with respect to longitudinal axis of working implement symmetry. In accordance with the first embodiment working liquid distribution means is installed to alternately communicate working cavities of main hydraulic cylinders with hydraulic pump and with hydraulic reservoir inlet. In the second embodiment working liquid distribution means may connect working cavities of main hydraulic cylinder with each other and with hydraulic pump in the first slide position, wherein main hydraulic cylinder dimension ratio is selected to provide ratio of square of piston diameter to square of shaft diameter equal to 2. In accordance with the third embodiment main working liquid distribution means provides alternate communication of main hydraulic cylinder working cavities with hydraulic pump and with hydraulic reservoir inlet, wherein additional distribution means is installed to provide connection of working cavities of main hydraulic cylinder with each other and with hydraulic pump in the first slide position. In the forth embodiment main distribution means may connect working cavities of main hydraulic cylinder with each other and with hydraulic pump in the first slide position, as well as with each other and with hydraulic reservoir inlet in the second slide position, wherein additional distribution means is installed to connect shaft end of balancing pneumohydrocylinder with hydraulic reservoir inlet in the first slide position and with hydraulic pump in the second slide position.

EFFECT: simplified structure, extended range of functional capabilities and increased rate of working implement lifting and lowering.

5 cl, 7 dwg

 

Group of inventions relates to loaded earthmoving, mining, construction and other wheeled and tracked lifting-transport machines circular action.

A device trim gravity working equipment : machine [AC No. 543715, 12.03.1977. Bull. No. 3]containing the working equipment, the main hydraulic cylinder balancing cylinder, primary and secondary distributors working fluid; a hydropneumatic accumulator, the control device further distributor, supply lines, water pump.

A disadvantage of this device is the presence of a hydropneumatic accumulator, a complex and expensive device.

The closest in technical essence of the known technical solutions to the proposed group of inventions is a device for balancing the force of gravity working equipment : machine [RF Patent №2236515, 27.03.2003]containing the working machinery, hydraulic cylinders and balancing pneumohydraulic, piston chamber which is connected to the gas cylinder; the primary and secondary valves of the working fluid pump.

The drawbacks are the low speed lifting, lowering work equipment, small performance, as well as complex design, obuslovlen is I have 3 cylinders.

The objective of the invention is to simplify the design of the device, trim, enhance and increase the speed of lifting, lowering work equipment.

The task of the group of inventions solved due to the fact that in the known device trims, including working equipment : machine, a main cylinder and balancing pneumohydraulic including a piston cavity, connected to a gas cylinder; a main distributor of the working fluid, a hydraulic pump, which according to the group of inventions, the main hydraulic cylinder and balancing pneumohydraulic installed parallel to and contiguous with respect to the longitudinal plane of symmetry of the working equipment, in the first embodiment perform the working fluid dispenser is mounted for connection working cavities of the main cylinder alternately with the water pump or drain in the tank; in the second embodiment, the dispenser device of the working fluid is configured to connection in one position of the valve working cavities of the main cylinder with the hydraulic pump, the ratio of the sizes of the main cylinder are taking so that the ratio of the square of the cylinder diameter to the square of the diameter of the rod is 2; in the third the m embodiment, the main valve is installed with the possibility of connection of the working cavities of the main cylinder alternately with the water pump and drain the tank, additional dispenser is mounted for connection in one position of the valve working cavities of the main cylinder with the hydraulic pump; in the fourth embodiment, the main valve is installed with the possibility of connection in one position of the valve working cavities of the main hidrocilindru between themselves and with the hydraulic pump, and the other among themselves and with the sink in the tank at the same time, the distributor has the possibility of connecting the rod end of the balancing pneumohydraulic in one position of the valve with drain to tank, and the other with a hydraulic pump.

The proposed group of inventions provides increased functionality of the machine, allows the following modes of operation:

in the first embodiment provide an energy-saving mode to the counterbalancing forces of gravity at normal driving speed of the working equipment;

in the second embodiment, the power saving mode of the counter-balancing force of gravity provides a doubling of the speed of rise of the working equipment;

in the third embodiment provides an energy-saving mode when two hoisting speed of the working equipment (first and second working speeds);

in the fourth embodiment, the provide is more of an energy-saving mode with twice the speed of the working equipment and increased the speed of lowering work equipment by connecting with the optional dispenser rod cavity balancing pneumohydraulic with a hydraulic pump.

The essence of the work of a group of inventions is as follows. Energy saving in the rise of the working equipment is carried out by balancing the forces of gravity working equipment using gas cylinders and balancing pneumohydraulic. The increase in the rate of rise of the working equipment 2 times reach the connection cavities of the main cylinder with the hydraulic pump and the condition: the ratio of the squares of the diameter of the cylinder and the rod is 2. The increase in the rate of lowering work equipment reach by connecting the rod end of the balancing pneumohydraulic with a hydraulic pump provides rapid pumping mode lowering the boom.

The group of inventions is illustrated by drawings, where figure 1 shows a General view of a wheeled excavator with a balancing device consisting of a main cylinder and balancing pneumohydraulic; figure 2 shows a view along arrow a on the cylinder working equipment and uravnoveshivaetsia pneumohydraulic; figure 3 shows a General view of the crawler excavator is a system of balancing work equipment; figure 4 shows the hydraulic balancing of the forces of gravity working equipment : machine according to the first var is the ant execution; figure 5 - hydraulic balancing of the forces of gravity working equipment : machine according to the second variant of the run; figure 6 - hydraulic balancing of the forces of gravity working equipment : machine according to the third variant of implementation; 7 - hydraulic balancing of the forces of gravity working equipment : machine according to the fourth variant of execution.

The group of inventions includes working equipment 1, the main cylinder 2, an equilibrium pneumohydraulic 3. Figure 2 shows the size To the minimum distance of the main cylinder 2 and the balancing pneumohydraulic 3; size M - the distance between the hinges of the arrows on the portal excavator (M>). Balancing pneumohydraulic 3 gas piston cavity is connected to a gas cylinder 4, the rod of the hydraulic cavity balancing pneumohydraulic 3 are connected by hydroline 5 through the main valve 6 with the sink in gutalac 7. Working cavity of the main cylinder 2 is connected with the main valve 6 hose 8. The standard element of the hydraulic system is the hydraulic pump 9. Figure 6 for the third variant execution system is an additional dispenser 10 is connected by a hose 11 with the working cavity of the main hydrochlide 2. 7 for the fourth variant implementation of the system is an additional dispenser 12, connected hydroline 5 with the rod cavity balancing pneumohydraulic 3.

The device of the balancing forces of gravity on the first version of the run (figure 4) is as follows. When powering up the slide valve of the distributor 6, the working fluid from the hydraulic pump 9 is applied to the piston cavity of the main cylinder 2, and from the rod end of the cylinder is drained to the hydraulic tank 7 through the valve 6. Simultaneously with the lifting work balancing pneumohydraulic 3, which as far as lifting goes compressed gas from the gas cylinder 4.

The rise of the working equipment is terminated by the installation of the distributor 6 to the neutral position shown in figure 4. For lowering work equipment the spool valve 6 is moved down, the working fluid from the hydraulic pump 9 is applied to the rod cavity of the main cylinder 2, and a piston cavity is drained to the hydraulic tank 7.

The device of the balancing forces of gravity on the second version of the run (figure 5) is as follows. When powering down the slide valve of the distributor 6, the working cavity of the main cylinder 2 by using the hydroline 8 are connected with the hydraulic pump 9. Simultaneously with the lifting work balancing pneumohydraulic 3, which as far as lifting goes compressed g is C from the gas cylinder 4, resulting work equipment 1 raise with double speed.

Device for counter-balancing force of gravity by the third variant of execution (6) works as follows.

When turning on the spool of the main valve 6 carry out energy-saving mode, the rise of a working equipment 1 like the first option run. In addition, when you turn down the additional spool valve 10 connects the working cavities of the main cylinder 2 by means of the hose 11 between themselves and with the hydraulic pump 9, providing an increase in the rate of rise of the working equipment 2 times. Thus, the third embodiment of the device provides two speed hoist working equipment: conventional and accelerated.

The device of the balancing forces of gravity according to the fourth variant of execution (Fig.7) works as follows.

When powering down the spool of the main valve 6 by means of the hose 8 connect the working cavity of the main cylinder 2 between themselves and with the hydraulic pump 9, through the accelerated advance of the operating equipment. While the additional spool valve 12 is in the position depicted in Fig.7. For the rapid lowering work equipment 1 spool of the main valve 6 include up, connecting with e the Ohm using the hose 8 working cavity of the main cylinder 2 between themselves and with the sink in the tank 7. At the same time when turning on the spool of the main valve 6 include up up the additional spool valve 12, while providing a connection by using the hydroline 5 rod end balancing pneumohydraulic 3 with the hydraulic pump 9. This provides a quick Hydra pump mode lowering work equipment.

Thus, the proposed group of inventions provides four options for balancing the forces of gravity working equipment.

1. Device trim gravity working equipment : the machine that contains the working equipment, the main hydraulic cylinder and balancing pneumohydraulic, piston chamber which is connected to the gas bottle, the dispenser of the working fluid pump, wherein the main cylinder and balancing pneumohydraulic installed parallel to and contiguous with respect to the longitudinal plane of symmetry of the working equipment, and the working fluid dispenser is mounted for connection working cavities of the main cylinder alternately with the water pump and drain the tank.

2. Device trim gravity working equipment : the machine that contains the working equipment, the main hydraulic cylinder and uravnovesena the speaker of pneumohydraulic, piston chamber which is connected to the gas bottle, the dispenser of the working fluid pump, wherein the main cylinder and balancing pneumohydraulic installed parallel to and contiguous with respect to the longitudinal plane of symmetry of the working equipment, and the working fluid dispenser is mounted for connection in one position of the valve working cavities of the main cylinder and hydraulic pump.

3. Device trim gravity working equipment : machine according to claim 2, characterized in that the size of the main cylinder accepted the way in which the ratio of the squares of the diameters of the piston and rod is 2.

4. Device trim gravity working equipment : the machine that contains the working equipment, the main hydraulic cylinder and balancing pneumohydraulic including a piston cavity, connected to a gas cylinder, primary and secondary distributors working fluid, a hydraulic pump, wherein the main valve is installed with the possibility of connection of the working cavities of the main cylinder alternately with the water pump and drain the tank at the same time, the distributor is mounted for connection working cavities of the foundations of the second hydraulic cylinder and hydraulic pump.

5. Device trim gravity working equipment : the machine that contains the working equipment, the main hydraulic cylinder and balancing pneumohydraulic, piston chamber which is connected to a gas cylinder, primary and secondary distributors working fluid, a hydraulic pump, wherein the main valve is installed with the possibility of connection in one position of the valve working cavities of the main cylinder with the hydraulic pump, and the other among themselves and with the sink in the tank at the same time, the distributor has the possibility of connecting the rod end of the balancing pneumohydraulic in one position of the valve with drain to tank through the main valve, the other with the hydraulic pump.



 

Same patents:

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9 dwg

FIELD: mechanical engineering.

SUBSTANCE: group of invention relates to boom earth-moving, mine, construction and loading lifting-and-transporting machines of cyclic action. Proposed balancing system contains working equipment, boom hydraulic cylinders and balancing cylinder including hydraulic rod space and gas piston space connected with gas bottle, and distributors. According to first design version, hydraulic rod space of balancing cylinder is connected by hydraulic line with drain into hydraulic tank, and distributor of hydraulic liquid is installed for connecting in one position of spool, of boom hydraulic cylinders working spaces to each other with hydraulic pump. According to second design version, distributor is installed in system for connecting working spaces of boom hydraulic cylinders to each other and with hydraulic pump. According to third design version, rod space of balancing cylinder is connected with distributor installed for connecting, in one position of spool, of rod space of balancing cylinder with into hydraulic tank, and in other position, with hydraulic pump. Distributor is installed in hydraulic line of boom hydraulic cylinders for connecting, in one position of spool, of spaces of boom hydraulic cylinders to each other and with hydraulic pump.

EFFECT: increased capacity of machine owing to higher speed of lifting and lowering of working equipment.

5 cl, 6 dwg

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1 dwg

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