Central collector of excavator
FIELD: machine building.
SUBSTANCE: central collector of excavator consists of stationary and movable parts. The movable part has the central air channel wherein there is installed an internal pipeline, on one end of which there is mounted a double-channel air splitter, while another one is equipped with an additional air collector made in form of two elements interconnected and performing full-circle rotation one relative to another. The first element is secured on the movable part and has axial and lengthwise channels, while the other one is attached to the stationary part and has two outlet channels. Also, one of the channels of two-channel air splitter is connected with the central air channel, while the other one is connected with the internal pipeline. The axial channel of the first element is connected with the internal pipeline and with one of the outlet channels of the second element; the lengthwise channel is connected with the central air channel and another outlet channel of the second element.
EFFECT: expanded functionality of pneumatic system.
2 cl, 1 dwg
The invention relates to the field of engineering, namely, excavators, and relates to the Central collector.
Famous design is the Central collector excavator (RF patent No. 2130530)containing a movable and a fixed part (respectively the column and sleeve).
A disadvantage of the known designs is the lack of a Central air channel, i.e. all channels are on the periphery between the outer surface of the column and the inner surface of the bushings, separated from each other by seals. Because the connection of the column and the collet is movable, the seals do not provide 100% tightness. And in the long run, leading to deterioration of seals, the probability of leakage of oil and/or air from one channel to the other increases. A pair of oil flowing in the air channel, are dangerous, as they can cause damage to the pneumatic system or fire excavator.
Also known construction Central collector excavator (see Kirill Rannev AV excavators. M.: Vysshaya SHKOLA, 1991, Excavator EO-B, SCR-148), selected as a prototype, comprising a fixed and a movable part, the latter has a Central air channel.
A significant disadvantage of the prototype is that there is only one air channel being is it to limit functionality of the pneumatic system. On this channel compressed air is supplied to the brakes of the wheels of the excavator (command to enable/disable the brakes of course). To extend the functionality of the pneumatic system required one air channel in the Central collector for additional commands (for example, to turn on/off the brake).
Task to be solved by the present invention is directed, is the creation of the core collector excavator, is free from the above disadvantage.
This task is solved in that the Central collector excavator, comprising a fixed and a movable part, the latter has a Central air channel, according to the invention provided with a hermetically installed in the Central air duct to the movable part of the inner pipe, one end of which is mounted dual air splitter, and the other provided with an additional air reservoir, made in the form interconnected with the possibility of a full-circle rotation of one relative to the other two elements, the first of which is fixed on the movable part, provided with axial and longitudinal channels, and the second fixed part, is made with two output channels, one of the channels dual air rasveti the El is connected to a Central air channel, and the other with the inner pipe, while the axial channel of the first element is connected with the inner pipe and one of the output channels of the second element, and the longitudinal - Central air channel and the other output channel of the second element.
In addition, the second mentioned element for additional air collector can be made with the possibility of axial movement relative to the first mentioned element.
The declared technical features are significant because they affect the technical result achieved.
The study of other known technical solutions in this field of technology the features distinguishing the claimed technical solution, have not been identified. This allows us to conclude that the claimed technical solution is new and not obvious from the current level of technology.
The proposed solution can be applied in the production of excavators.
The invention is illustrated in the drawing, which shows a Central collector excavator.
In particular the performance of the Central collector excavator contains the stationary part 1 and the movable part 2, and the movable part 2 has a Central air channel 3.
In the Central air channel 3 is the movable part 2 is hermetically installed internal speaker the wires 4, on one end of which is mounted dual air splitter 5, and the other provided with an additional air reservoir, made in the form interconnected with the possibility of a full-circle rotation of one relative to the other two elements 6 and 7.
The first element 6 mounted on the movable part 2, is made with an axial channel 8 and the longitudinal channel 9, and the second element 7 mounted on the fixed part 1, performed with two output channels 10 and 11 and the channel 12-channel air splitter 5 is connected to a Central air channel 3 and channel 13 with the inner pipe 4, while the axial channel 8 of the first element 6 is connected with the inner pipe 4 and outlet channel 10 of the second element 7, and the longitudinal channel 9 with the Central air channel 3 and the output channel 11 of the second element 7.
The second element 7 additional air collector can be made with the possibility of axial movement relative to the first element 6.
The work of the Central collector excavator is as follows.
Dual air splitter 5 splits supplied from the pneumatic system commands on the two channels 12 and 13, which provides the possibility of simultaneous or separate include two pneumatic commands. The pneumatic system delivers compressed air to the channels 12 and/or 13, which respectively through the inner pipe 4 and the Central air channel 3, passing respectively through the axial channel 8 and the longitudinal channel 9 transmit the air pressure to the output channels 10 and 11, where it is supplied to the pneumatic units, located on the chassis of the excavator.
When the swing excavator stationary part 1 of the Central manifold together with the second element 7 additional air collector remains in place relative to the chassis frame of the excavator, and the movable part 2 with dual air splitter 5, the inner pipe 4 and the first element 6 additional air collector is rotated together with the platform. However, due to the above relationships, the pressure supply of air from the channels 12, 13 to output channels 10, 11 is at any angle of rotation of the movable part 2 of the Central manifold relative to the fixed part 1. While retaining the possibility of transmission of two pneumatic commands (separately or simultaneously).
During rotation of the platform relative to the chassis frame at the Central collector is transmitted vibrations that occur during operation of the excavator. When the movable part 2 of the Central manifold together with the first element 6 additional air collector makes axial movement is otnositelno the fixed part 1 and the second element 7 additional air collector. If applied to the channels 10, 11 pneumothrax made in the form of flexible hoses, these movements are compensated within the pliability of the material of the flexible sleeve. If applied to the channels 10, 11 pneumothrax made in the form of metal pipes, to prevent their destruction and the vibration compensation of the second element 7 additional air collector is required to perform with the possibility of axial movement relative to the first element 6.
Thus, the application of this invention will extend the functionality of pneumatic excavator by increasing the number of possible pneumatic commands.
1. Central collector excavator, comprising a fixed and a movable part, the latter has a Central air channel, characterized in that the Central air duct so that the movable part is hermetically installed internal piping, one end of which is mounted dual air splitter, and the other provided with an additional air reservoir, made in the form interconnected with the possibility of a full-circle rotation of one relative to the other two elements, the first of which is fixed on the movable part, provided with axial and longitudinal channels, and the second, fixed on stills is IGNOU part, made with two output channels, with one channel of dual air splitter is connected to the Central air channel, and the other with the inner pipe, while the axial channel of the first element is connected with the inner pipe and one of the output channels of the second element, and the longitudinal - Central air channel and the other output channel of the second element.
2. Central collector excavator according to claim 1, characterized in that the second mentioned element for additional air collector is made with the possibility of axial movement relative to the first mentioned element.
SUBSTANCE: energy-saving operating equipment includes digging arm base, digging arm head, handle, bucket, the main hydraulic cylinders for lifting the digging arm, control hydraulic cylinder of the digging arm length, additional balancing pneumatic cylinder connected to portal and to the digging arm base. Piston cavity of balancing pneumatic hydraulic cylinder is connected to gas bottle charged with pressure of more than 10 MPa and having the volume equal at least to five operating volumes of balancing pneumatic hydraulic cylinder. At that, to piston cavity at least of one main hydraulic cylinder for lifting the digging arm there connected is hydropneumatic accumulator the gas cavity of which is charged with initial pressure of more than 10 MPa and divided at least into two gas chambers separated with a partition in which an adjustable orifice is installed.
EFFECT: higher operating efficiency of machine, lower energy losses and higher efficiency of operating equipment.
FIELD: machine building.
SUBSTANCE: device consists of pulling and back cables, of pulling semi-block (3), of back semi-block (4) and of hydraulic system of compensation. The hydraulic system of compensation has pulling (9) and back (10) hydro-cylinders positioned on a handle; piston cavities of hydro-cylinders are connected with hydro-drive (6). Further, the system has back valve (11), safety valve (12) and valve (13). The pulling and back cables are reeved through pulling (3) and back (4) semi-blocks and external and internal strands of double-strand units on drums of a pressure winch. Rods of hydro-cylinders (9) are connected with semi-block (3), while rods of hydro-cylinders (10) are connected to semi-block (4) which facilitates changing length of pulling and back cables with transfer of the semi-blocks along the handle. Ratio of back diameters to diameters of pulling hydro-cylinders is more, than one.
EFFECT: reduced dynamic loads on working equipment, increased service life of cables, of strands of blocks and drums of winch.
SUBSTANCE: slewing device of mine excavator includes movable carrier ring, fixed support ring, toothed rim with lower attachment flange to housing of excavator undercarriage and taper rollers installed between carrier and support rings on axes of separators with possibility of free rolling between carrier and support rings along conic annular tracks made on rings. At that, axes of separator are fixed in separator housing and inclined relative to rotation axis of movable carrier ring. Toothed rim is equipped with inner projection, and carrier ring is equipped with outer projection with annular tracks. Projection of toothed rim is located above projection of carrier ring, and between projections in the appropriate separator there installed are rolling bodies with possibility of free rolling along annular tracks of projections.
EFFECT: higher reliability of slewing device, without applying any special requirements to properties, quality and technology of materials.
4 cl, 4 dwg
SUBSTANCE: device comprises a boom, a bucket, the main hydraulic cylinder of the boom, a balancing pneumatic hydraulic cylinder, a gas balloon. The main hydraulic cylinder of the boom and the balancing pneumatic hydraulic cylinder are located in a single longitudinal vertical plane of the boom symmetry, so that the balancing pneumatic hydraulic cylinder is brought to the boom as close as possible in the lower and upper limit positions of the working equipment. The boom base is arranged in the form of a box, where the balancing pneumatic hydraulic cylinder is installed, a piston cavity of which is connected to a gas balloon charged with pressure of more than 10 MPa. At the same time the volume of the gas balloon makes more than five working volumes of the balancing pneumatic hydraulic cylinder.
EFFECT: energy-saving and simplification of design.
SUBSTANCE: hydromechanic system for stabilisation of surface planning machine working element tilt. On pendulum in parallel to its longitudinal axis, actuator screw is installed. The top part of this screw is connected with actuator. Profiled nut is installed on actuator screw. This nut mates with swivel link. On the pendulum, profiled nut position sensor is installed. Profiled nut position indicator is installed in the cabin of surface planning machine.
EFFECT: enhancement of hydromechanic system for stabilisation of surface planning machine working element tilt and higher efficiency.
SUBSTANCE: energy-saving working equipment of a single-bucket excavator on a rotary column comprises a top utility tractor, a rotary column, including a base and a head, a boom, a handle, a bucket, main hydraulic cylinders of a boom. The boom is hingedly connected to a head of a rotary column, and the main hydraulic cylinders of the boom are hingedly connected to the base of the rotary column and the boom. A balancing pneumatic hydraulic cylinder is connected to the base of the rotary column and the boom, and a piston cavity of the balancing pneumatic hydraulic cylinder is connected to a gas balloon charged with pressure of more than 10 MPa. At the same time the gas balloon volume makes more than five working volumes of the balancing pneumatic hydraulic cylinder, a hinged joint of which is arranged on the base of the rotary column with displacement relative to the boom hinged joint on the rotary column head, with the possibility to ensure compact arrangement at the upper and lower positions of the working equipment.
EFFECT: increased effectiveness and efficiency factor, improved design of the working equipment.
SUBSTANCE: machine comprises a motor vehicle chassis with a full-circle platform installed on it. The following components are mounted on the platform - an operator's cabin, an engine, hydraulic system sets, a manipulator, a balancing weight and a mechanism of balancing weight movement relative to the full-circle platform. The balancing weight in the form of an engine and hydraulic system sets on the auxiliary platform with the possibility of its movement in the horizontal plane along longitudinal guides. Longitudinal guides are rigidly fixed on the full-circle platform. The mechanism of balancing weight movement is made of a yoke, which is hingedly installed on the bracket, which is rigidly fixed on the full-circle platform. The yoke with its front arm is hingedly via a traction rod is connected to a manipulator, and with its back arm is hingedly via a traction rod connected to the balancing weight.
EFFECT: reduced weight of the machine, increased stability during process operations, and as a result, higher reliability in operation.
2 cl, 2 dwg
FIELD: machine building.
SUBSTANCE: device for control over levelling capacity of surface planning machines consists of sensor of back frame angular position, of sensor of angle between hinged front and back frames and of angle master. Also, outputs of the sensor of back frame position angle and angle master are connected with a hydro-cylinder via a comparison element and a control unit by means of an electrically controlled hydro-valve. The hydro-cylinder is installed between the front and back frames and ensures change of position of a cutting edge of a working tool. The device is equipped with a computing unit, an input of which is tied with the output of angular position sensor between the front and back frames, and with a controlled scale unit, the input of which is connected with the output of the computing unit, while the output is coupled with the comparison element. A signal at the output of the computing unit corresponds to a signal at its input multiplied by ratio of distance from a hinge between the front and back frames to the cutting edge of the working tool to distance from the back support of the planning machine to the hinge.
EFFECT: elimination of observed uncertainty for value of proportionality factor of measured angle of relative position between front and back frames.
2 cl, 3 dwg
SUBSTANCE: hydraulic system of independent flows distribution consists of hydraulic distributors, discharge cavities of which are supplied from according discharge hydraulic lines. At least another hydraulic distributor is supplied from several discharge hydraulic lines with its discharge cavity via check valves. And at least one check valve that supplies to discharge cavity of any distributor is arranged with the possibility of its forced closure in case of necessity.
EFFECT: distribution of several independent flows by minimum number of distributors between various hydraulic engines.
SUBSTANCE: group of inventions relates to the field of mining and construction, in particular, to rotary cutting tool, which may be used to pierce through thickness of soil. Rotary cutting tool includes body, which has axial front end and axial back end, and also axial length. Hard tip, which has remote end, is fixed to body of cutting tool at its axial front end. Body of cutting tool has a section of back surface, arranged along axis behind remote end of hard tip, and having transverse dimension. Section of back surface includes axial front transverse dimension and minimum transverse dimension, which is located along axis behind axial front transverse dimension. Axial front dimension exceeds minimum transverse dimension. Section of back surface has axial length within the limits from approximately 10% to 35% of axial length of cutting tool body.
EFFECT: improvement of rotary cutting tool, to reduce extent of resistance of rotary cutting tool when piercing through soil thickness, with small angle of separation.
32 cl, 9 dwg
FIELD: earth-moving equipment.
SUBSTANCE: proposed excavator tooth unit contains holder with main part and nose part, both arranged coaxially relative to longitudinal axial line of holder. Main part is made for fastening said holder to excavator. Nose part terminates in free front end and it has upper and lower surfaces located mainly respectively higher and lower than longitudinal axial line of said holder. Upper surface of said nose part has two inclined sides arranged at opposite sides from longitudinal axial line and in front relative to rear end of said nose part over its length. Each inclined side of said upper surface is arranged at angle of 25-65° to horizontal plane. Lower surface of said nose part has two sides arranged at opposite sides relative to longitudinal axial line of said holder. Cavity made in said nose part comes to one of inclined sides of said upper surface of nose part of holder, being arranged along axis intersecting opposite sides of upper and lower surfaces of said nose part at angle of 30-60° to horizontal plane. Excavator tooth has front and rear end parts. Blind space open to rear end of said tooth and designed for fitting-in section of nose part of holder is made in rear end part of said tooth. Tooth is provided with hole arranged in working combination with inclined cavity of holder when tooth and holder are in working connection. Pin-type locking device is provided being arranged in cavity of said holder and at least partially passed through hole in said tooth for detachable fastening of tooth and holder in working connected. Tooth and holder described in invention form with tooth unit a ground of inventions.
EFFECT: improved reliability of excavator tooth unit.
40 cl, 31 dwg
FIELD: earth-moving facilities; hydraulic drives of scraper working members.
SUBSTANCE: proposed hydraulic drive contains pressure spool installed in parallel with like spaces of two hydraulic cylinders, pressure main line connected between two check valves, free outlet of check valve being connected with inlet of pressure spool and one hydraulic cylinder. Free inlet is connected with outlet of pressure spool and other hydraulic cylinder, drum main line connects opposite spaces of hydraulic cylinders. Hydraulic drive is furnished with two series-connected pressure spools. Inlet of first pressure spool and outlet of second pressure spool are connected with outlet of first hydraulically controlled reversible spool. Their common line is connected with controllable space of second hydraulic cylinder and is separated by check valve from pressure main line. Inlets of first hydraulically controlled reversible spool are connected to outputs of second hydraulically controlled reversible spool and are connected with controllable spaces of first and second hydraulic cylinders. One inlet of second hydraulically controlled reversible spool is connected with inlet of pressure spool and is connected to pressure line through check valve, and second inlet is separated from pressure line by other check valve. Control spaces of two hydraulically controlled reversible spools are united and are connected to pressure main line through two-position spool.
EFFECT: improved efficiency of control of scraper blade system.
FIELD: earth moving equipment; mining industry.
SUBSTANCE: invention relates to control of dc electric drive of main mechanisms of single-bucket excavator and it can be used in other dc drives of mining machines and mechanisms operating at low temperatures and wind loads. Method comes to control motor stopping by control of field current simultaneously and in inverse proportion to value of motor setting speed. Control of motor speed as a function of complex parameter taking in account level of negative temperature of machine metal, wind load and speed of change of these values, is also carried out. Device for implementing the method contains additionally motor field current setter mechanism, motor field current regulator whose output is connected with motor field current source, motor field current weakening setter whose input is connected with output of master controller, and output, with second input of field current regulator. First input of motor field current regulator is connected to output of motor maximum field current setter. Shaper of complex signal taking into account negative temperature of metal of machine, wind load and speed of change of said values is connected with second input of emf regulator.
EFFECT: reduced dynamic loads at starting, reversing and stopping, improved conditions of excavator bucket filling at digging.
3 cl, 5 dwg
FIELD: forestry, in particular, processing apparatuses for tree harvesting machine used in tree felling and bunching equipment.
SUBSTANCE: supporting-rotating apparatus has base and rotary platform between which are positioned three rotating wheels and two intermediate members, said intermediate members being mounted between rotating wheels. Central brake is installed on rotary platform and is cooperating with base through joining link which is connected with its upper end through Hooke's universal joint and central brake to rotary platform and with its lower end through the same Hooke's universal joint to base. Link is adapted for changing its length by means of, for example, splined joint. Intermediate and lower rotary wheels are equipped with brakes. Intermediate rotary wheel brake is mounted on upper intermediate member. Lower rotary wheel brake is mounted on lower intermediate member. Rotary wheels are arranged at an angle with respect to each other. On rotation of rotary platform, rotation mechanism cooperates with one of rotary wheels. During operation on slopes, individual members of apparatus are rotated to thereby level rotary platform until it is rotated and set in horizontal plane.
EFFECT: increased efficiency by employing machine for felling and bunching trees on uneven felling areas and on slopes, reduced labor intensity, and provision for creating comfortable working conditions for operators.
FIELD: handling machinery, particularly soil-shifting, mining, agricultural and loading cyclic machines.
SUBSTANCE: device includes implement, main hydraulic cylinders and balancing hydraulic cylinder, at least one gas cylinder and hydropneumatic accumulator, main and additional hydrodistributors, as well as safety valve. Gas cylinder communicates with gas chamber of hydropneumatic accumulator. Device made in the first embodiment has the second additional hydrodistributor connecting working chambers of the main hydraulic cylinders with each other and with pump. Rod end of balancing hydraulic cylinder communicates with rod ends of the main ones. In the second embodiment additional hydraulic cylinder is arranged in main hydrodistributor case and connected to hydrolines of the main hydraulic cylinders through hydrolines. Additional hydrodistributor is installed so that additional hydrodistributor may connect working chambers of the main hydraulic cylinders with each other and with the pump when additional hydrodistributor is installed in the first position. Additional hydrodistributor being installed in the second position may connect working chambers of main hydraulic cylinders with each other and with drain. Rod end of balancing hydraulic cylinder is connected with rod ends of main hydraulic cylinders.
EFFECT: increased machine productivity due to increased implement hoisting speed.
3 cl, 4 dwg
FIELD: excavation equipment, particularly small metalwork for digging elements.
SUBSTANCE: unit for wearing and supporting members has replaceable tooth head and holding structure including intermediate holder with front part of front end arranged in pocket of rear end of tooth head and complementary thereto. Front part is secured in the pocket by the first glut pin structure. Holding structure also has main holder with front part of front end complementarily inserted in pocket of rear end of intermediate holder and secured in the pocket by the second glut pin structure. Rear end of main holder is operatively secured to cutting blade of excavator bucket. Each front part have oval configuration elongated in horizontal direction. Glut pin structures extend in horizontal direction. Front parts have reinforcing projections arranged in orifices adapted to secure front parts. Holder and tooth head are provided with mating ribbed areas.
EFFECT: reduced unit size, improved power and working characteristic, as well as wear-resistance characteristics.
40 cl, 7 dwg
FIELD: dredgers or soil-shifting machines for special purposes, particularly to cut chaps in ground.
SUBSTANCE: device comprises at least one cutter brought into rotation and at least one the first cutting member to cut ground during cutter rotation in the first direction. At least one the second cutting member for ground cutting rotated in the second direction opposite to the first one is installed on the cutter. At least one of the cutting members may be shifted from the first ground cutting position to the second diverted position. Executive tool to shift the cutting member between the first and the second positions is also provided.
EFFECT: increased cutting ability in both rotational directions, prevention of excessive cutting member wear.
12 cl, 2 dwg
FIELD: mechanical engineering; design of excavator dipper teeth.
SUBSTANCE: parallelepiped inserts are fitted in tooth point and inserts of cylindrical form are fitted further on along working plane. Inserts manufactured of wear-resistant cast iron, owing to shadow effect, prevent intensive abrasive wear of steel base, thus increasing service life of tooth. As wear-resistant inserts are arranged only on one of working surfaces, other surfaces (opposite one) is subjected to more intensive wear which provides finally sharpening of tooth in process of operation. Use of such design and method of manufacture make it possible to increase service live more than two times and provided reliability of operation of excavator dipper.
EFFECT: increased service life and provision of self-sharpening of tooth point owing to fitting-in small size wear-resistant cast iron parts in steel base.
4 cl, 4 dwg
FIELD: mechanical engineering, particularly hydraulically driven dredgers.
SUBSTANCE: drive comprises power plant with controlled power pumps having servo control taps, gear-box, hydraulic motors and hydraulic equipment. Hydraulic equipment has hydraulic distributor with address travel spool and its servo control taps, power hydraulic lines and servo control loop with hydraulic lines. The controlled power pumps may supply predetermined volume of working liquid at zero pressure in servo control lines thereof. Hydraulic lines for servo control of address travel spool have additional circuit including control unit, servo control lines and logical hydraulic OR valve with two inlet and one outlet taps. Hydraulic lines of servo control circuit included in additional loop are connected with inlet taps of hydraulic OR valve having outlet tap communicated with servo control taps of address travel spool.
EFFECT: provision of no-failure gear actuation in standing still dredger.
FIELD: mechanical engineering, particularly hydraulic systems for mobile machines.
SUBSTANCE: hydraulic system comprises hydraulic reservoir, controllable hydraulic pump with load-sensitive control slide, power hydraulic line protected with safety valve, main hydraulic distributor with three-position slide having one pressure supply means, two discharge lines, two working outlet means and line, which provides connection of each working outlet means with LS line, attached to control slide. The hydraulic system is provided with pressure control valve and with controllable reducing valve installed in LS line. Input and output of reducing valve are connected to hydraulic distributor and control slide correspondingly. Control line of reducing valve is linked to pressure control valve outlet. Inlet and discharge line of the pressure control valve are connected with power hydraulic line and with hydraulic reservoir correspondingly.
EFFECT: increased operational efficiency and reliability.
7 cl, 1 dwg