JPS60501601A - Hydraulic equipment for transportation equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Hydraulic equipment for transportation equipment Technical field The present invention relates to traffic engineering, and more particularly to a steering system for a transportation device.

Background technology Hydraulic systems including steering devices and operating equipment of conventionally well-known transportation equipment (French patent publication) Publication No. 2. 3'l,,22/classification number B6λDj'/OA) is It has a hydraulic cylinder and a hydraulic steering device that cooperate with the control equipment of the transportation equipment. . This hydraulic steering system has a hydraulic control valve with 5 roads and 3 positions, and this hydraulic control valve is used for steering wheels. and mechanically connected to the hydraulic motor of the coupled retraction mechanism. This J road Hydraulic pressure 1b in three positions (the control valve cooperates with said hydraulic cylinder by a line and a return line It is connected to the hydraulic reservoir by a pressure line, and the main Connected to hydraulic control valve. The hydraulic control valve of the hydraulic steering system is in its neutral position. A conduit leads to the pressure conduit and is connected to the actuation conduit of the hydraulic control valve to be discussed. A third conduit and a third conduit are closed, and a second conduit is connected to the return conduit. j can be connected to the conduit.

When the hydraulic control valve of the steering device is at the end, the first conduit of this hydraulic control valve is connected to the sliding part. connected to the second pipe line through a restrictor georifice consisting of a material and a main body of the hydraulic control valve. and also connected to the third conduit or the third conduit (depending on the direction of movement of the sliding member) and the opposing Miya route (third pipe line or ≠ pipe line) is connected to the j-th pipe line. .

The first conduit of the three-way, two-position main hydraulic control valve has a spring-loaded sliding member. and is connected to the outlet of the hydraulic pump, and the inlet of this hydraulic pump is connected to the reservoir a second line of the main hydraulic control valve is hydraulically connected to the pressure line; The third conduit is hydraulically connected to an inlet of a hydraulic system of a working device of the transportation device. Before 3-way 2-position main hydraulic pressure ii+'! @The control chamber of the valve is located on the spring side of the 16 moving member. and is hydraulically connected to the second conduit of the hydraulic steering device.

The other control chamber of the main hydraulic control valve is arranged to face the control chamber, and Connected to pressure line.

When the main hydraulic control valve is in a position other than the above, the main hydraulic control valve connected to the hydraulic pump is One line is hydraulically connected to a second line connected to the pressure line, whereas the first line is When the main hydraulic control valve is in a position other than the above, its first pipe line is connected to its second pipe line and It is connected to a third conduit, and this third conduit is connected to the inlet of the hydraulic device.

When the steering wheels are stationary, hydraulic fluid is supplied from the hydraulic pump to the main hydraulic control. The valve supplied with n1 enters the control room opposite the location of the spring. The steering device When the hydraulic control valve is in the neutral position, this control valve is closed and the pressure line is pressure increases, and the sliding member of the main hydraulic control valve therefore moves to another position; The hydraulic pump is connected to the inlet of the hydraulic system.

When the steering wheel is rotated, the movable member of the hydraulic control valve moves to either end. Moving. With this movement, the restriction 9 orifice will cause the pressure line to operate properly. Connect to the conduit and the control chamber on both sides of the spring of the main hydraulic control valve. As a result, the operation The position of the ground motion member of the hydraulic pressure 614 control valve of the rudder device changes, and the hydraulic pump Pressure NjU　1 is separated from the inlet of the wholesale valve and connected to the pressure pipe of this pump, This pressure pipe moves the sliding member of the hydraulic control valve of the steering device, and Flow the required hydraulic oil. When the sliding member of the main hydraulic control valve moves to the end position, The hydraulic pump forces hydraulic fluid to flow to the full rated amount to the steering device. Therefore, with The delivery of hydraulic fluid to working equipment is discontinuous.

The conventional hydraulic system has low operational reliability. The reason is that the transportation equipment is In an emergency situation, for example, if an engine breaks down and stops, the oil that was being driven by the engine If the pressure pump stops rotating, or if the hydraulic pump and the main hydraulic control valve are connected. It has become clear that the transportation equipment may become uncontrollable if the hydraulic passageway that is connected to it loosens. Because it is a raft.

Furthermore, the conventional hydraulic system incorporates seven to several hydraulic pumps, and these several This is a system that ensures the desired maneuverability of the transport equipment on which the entire hydraulic pump is mounted. Therefore, mainly for economic reasons, a 7th hydraulic control valve is installed in the hydraulic system. This is limited to transportation equipment equipped with so-called powerful paper cutting equipment.

Disclosure of invention The object of the present invention is to develop a novel oil pump that increases reliability of operation and can be installed in a pinched space. An object of the present invention is to provide a hydraulic system for transportation equipment in which pressure equipment is arranged.

The purpose includes a steering hydraulic system and an operating hydraulic system, and a vehicle equipped with this hydraulic system Seven or more hydraulic cylinders mechanically connected to the control equipment of the transportation equipment and a steering wheel and mechanically connected to the retraction mechanism and to the hydraulic cylinder by an actuating conduit; and a hydraulic steering device hydraulically connected to the ρ reservoir by a return line and a two-position main a hydraulic control valve, and at the position of the valve where the first pipe line and the second pipe line of the hydraulic control valve are located. A spring-loaded sliding member is provided, and a sliding member is provided at another position of the main hydraulic control valve and to third pipes are interconnected, and the first pipe of the two-position main hydraulic control valve is connected to a hydraulic pump. the inlet of the hydraulic pump is connected to the reservoir, and the inlet of the hydraulic pump is connected to the reservoir; The second conduit is connected to the hydraulic steering device by a pressure conduit, and the third conduit is connected to the hydraulic a first valve connected to the main hydraulic pressure control valve on the spring side of the main hydraulic control valve; fif! The I chamber is hydraulically connected to the front bichamber pressure steering system, and this hydraulic steering system When in the operating position, it is connected to the appropriate operating line, and the front Re hydraulic steering device is in the neutral position. The second space control chamber of the main hydraulic control valve is connected to the return pipe when the main hydraulic control valve is in According to the present invention, in a hydraulic system for a transportation device connected to a pressure line, the above-mentioned The two-position main hydraulic control valve of the hydraulic system for transportation equipment is equipped with a second pipe. This passage A is connected to the first pipe line and the second pipe line at the position of the second valve of the hydraulic control valve. the main hydraulic control valve is connected to the It has an accumulator, and the hydraulic oil supply device for this accumulator is connected to other hydraulic pumps and and a hydraulic oil supply valve, whose population is hydraulically connected to the inlet of said hydraulic pump. The achi mulator and the main hydraulic control valve are connected via a check valve. The outlet is connected to the transportation device connected to the reservoir, and the outlet is connected to the reservoir. This is accomplished by a hydraulic system.

The above object also includes a hydraulic system for a steering system and a hydraulic system for operating equipment, seven or more hydraulics mechanically connected to the controlled equipment of the transportation equipment loaded with the equipment; The cylinder is mechanically connected to the steering wheel and the retracting device, and is connected to the operating pipe in front of the cylinder. hydraulically connected to the hydraulic cylinder and to the hydraulic reservoir by a return line, respectively. Hydraulic steering system and hydraulics? 1i': has a main hydraulic control valve of controlled position type, The main hydraulic control valve has a spring-loaded sliding member at one valve position, and one It has a first pipe line and a second pipe line at the position of the valve, and a first pipe line to a third pipe line at the other position. 2. are interconnected, and the third line of the main hydraulic control valve is in contact with the outlet of the hydraulic pump. sanity and the inlet of this hydraulic pump is connected to the reservoir and the inlet of the main hydraulic control valve is connected to the reservoir. The two pipes are connected to the hydraulic steering device tK by a pressure pipe, and the main hydraulic control valve The first control chamber on the side with the spring is configured to perform appropriate operations when the hydraulic steering system is in the operating position. a second control chamber of the main hydraulic control valve is connected to the steering device by a hydraulic conduit; A cage according to the invention is provided in a hydraulic system for a transportation device which is hydraulically connected to a pressure line. The two-position main oil pressure control valve is provided with a G pipe line, and this G pipe line is connected to the main oil pressure control valve. When the pressure control valve is in the one position, it is connected to the first pipe line and the 21st z line. is not connected in other positions, and a hydraulic accumulator is added to the main hydraulic control valve. The hydraulic oil supply device for this accumulator has a controllable hydraulic oil supply valve, The inlet of this supply valve is connected to the third pipe line of the main hydraulic control valve, and the inlet of the supply valve is connected to the third pipe line of the main hydraulic control valve, and It is also connected to the accumulator, and further connected to the ≠ pipe line of the main hydraulic control valve. , whereas the discharge port of the hydraulic oil supply valve is connected to the reservoir. This is accomplished by housing the hydraulic system for the device.

The purpose also includes a hydraulic system for steering and a hydraulic system for operating equipment; seven or more hydraulic cylinders mechanically connected to the controlled equipment of the transport equipment loaded with mechanically connected to the steering wheel and the joint-coupled reversing device, and said actuator. Oil is supplied to the hydraulic cylinder through a pipe line, and to the reservoir through a return hydraulic line. A hydraulic steering device that is pressure-coupled with a sliding member with a spring is attached, and the a two-position main hydraulic control valve controlled by the main hydraulic control valve; There is a first pipe line and a λth pipe line, and at the other position of the city 1]1 wholesale valve, the first pipe line A third line is mutually connected, and a first line of the co-position type main hydraulic control valve is connected to a hydraulic pump. The population of this hydraulic pump is connected to the reservoir and the main oil The second and second pipes of the pressure (b1) control valve are connected to the hydraulic steering device by a pressure pipe. A first control chamber provided on the side to which the spring of the main hydraulic control valve is attached is connected to the steering wheel. The steering gear is supplied with oil by suitable lines in the operating system when the equipment is in the operating position. The main hydraulic control valve is connected hydraulically to -2 m'l! The chamber is connected to both chamber pressure lines. Based on the present invention, there is a hydraulic system KL for a transportation device, which is configured to control the hydraulic pressure amount 1] The position type main hydraulic control valve has a 1st pipeline added, and this 1st ≠ analogy is r(!J We main One position of the hydraulic control valve is connected to the first pipe line and the second front line, but the other position is connected to the first pipe line and the second front line. Hakn　M? , a hydraulic accumulator is added to the main hydraulic control valve, The hydraulic oil supply device of this Achimulator has a controllable hydraulic oil supply valve, and this The inlet of the supply valve is connected to the third pipe line of both the main hydraulic IU valves, and a check valve is installed. connected to the accumulator via and to the fourth ′ end of the main hydraulic control valve; On the other hand, the outlet of the hydraulic oil supply valve is connected to the hydraulic system through a one-ton check valve. This is achieved by means of a hydraulic system for the consignment-Aml connected to the port.

In order to simplify the shape of the device, that is, the hydraulic device for transportation equipment, the hydraulic W rudder A throttle position chair and a 3-position hydraulic control valve are installed in mn, and the throttle position position chair is installed in the l11( of the main oil correct amount 1] master valve which is outside the hydraulic f open side square of the hydraulic steering system) It is effective to provide it at the same position in both chambers.

In addition, in order to incorporate the hydraulic system into the above-mentioned 4M device? Field In terms of pressure? H (The main hydraulic pressure control valve of the pressure retaining device is set to the ≠ road type, and the first The Y channel and the second tongue channel are in contact with each other and washed, but the third channel and the third tongue channel are closed and the above-mentioned Main hydraulic pressure-I] The 1st i path of the control valve is the front 6 pressure pipe and the 1st control valve of the main hydraulic control valve. the second conduit is connected to the return conduit, and the third conduit and the third conduit are connected to the The pipe line 4 must be in contact with the hydraulic line of the operating system so that it can be read.

Similarly, in order to reduce the flow rate of hydraulic oil required for trial control of the main hydraulic control valve, Install both road hydraulic pressure valves in the steering device of the hydraulic system for transportation equipment, and control this hydraulic pressure. When the valve is in the neutral position, the first and second ducts are interconnected; 3rd pipe to the 3rd! The pipe is closed, and the first pipe of the hydraulic control valve of the steering device is connected to the oil. It is connected to the first control chamber of the two-position main hydraulic control valve of the pressure control type, and the throttle and is connected to the pressure line by a j-th line through an orifice, and the λ-th line is in front. The third conduit and the third conduit are connected to the operating system conduit. It is practical to do so.

By using the present invention, the operational reliability of the hydraulic system for transportation equipment is improved. At the same time, the mounting space can be saved.

Brief description of the drawing Fig. 1 is a schematic system diagram of a hydraulic system for transportation equipment based on the present invention, and Fig. 2 is a schematic diagram of a hydraulic system for transportation equipment based on the present invention. A schematic system diagram of a second embodiment of a hydraulic system for transportation equipment; FIG. Fig. 5 is a schematic system diagram of the tth embodiment of the above-mentioned hydraulic system. is a schematic system diagram of a j-th embodiment of the hydraulic system.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings.

Hydraulic systems for transportation equipment include hydraulic steering systems and hydraulic systems for operating equipment (Figure 1). . The hydraulic system has a hydraulic cylinder λ, and this hydraulic cylinder λ has a rod 3. , and the rod 3 is mechanically linked to a control device of the transportation device (not shown). Ru.

The hydraulic system has a hydraulic steering system, and this hydraulic steering system λ≠ is connected to the steering wheel j and mechanically. work together. The hydraulic steering system Hiroshi has a hydraulic pressure ■1]@valve 6, and this hydraulic pressure +lJl ] The control valve cooperates with a reversing device 7 which is coupled to the valve.

The reversing device 7 can be operated in a known suitable manner, for example by moving the control equipment of the transport device to the hydraulic The steering device t may be linked to the control valve 6 in a simulated manner, or the steering device t may be linked to the hydraulic series. A reversing hydraulic motor may be attached to the hydraulic system connected to the driver λ.

The hydraulic control valve t is a J-way 3-position valve, and this valve is connected to the seventh pipe line t1, the λ-th pipe line, Third conduit 10. 4th conduit l/and 3rd conduit! It has 7.

When both the hydraulic valves 2 are in the neutral position/3, the first pipe line r1 and the third v line /Q and the ≠th channel /l are closed, and the λth channel and the fifth channel lλ are connected to each other. Continued.

When the hydraulic control valve is in any operating position, e.g. The first pipe g connects to the λ-th pipe line and the third pipe line io via the throttle orifice 15. The third pipe line /l is connected to the third pipe line 10.

When the hydraulic pressure tσIJ@valve is at a position dJz other than the above, the first pipe The path r passes through the diaphragm georifice /j to the λth conduit and the third conduit! connect to 7 - The third pipe line 10 is connected to the j-th pipe line 7.2.

The hydraulic steering device≠ is connected to the hydraulic cylinder by a conduit 17, pipe/7. /I are the third conduit 10 and the third conduit of the hydraulic valve O, respectively! 7 connected to.

The hydraulic steering device ≠ is connected to the hydraulic reservoir 〇 by a return path 9-#, and this The return pipe 1 is connected to the j-th pipe 2 of the hydraulic control system.

Moreover, the hydraulic pressure Ruf is controlled by a hydraulic pressure l! Position valve type main hydraulic control valve, with 2/ However, this main hydraulic control valve-27 supports the sliding member 2.2, and this flame;-child member-2. A spring 23 is provided on the end surface 1iI11 of the moving member λ2. will be placed.

Said main hydraulic pressure 1] Control valve 2/ is a Hiroji type valve, and its 7 operating positions 2 and 1st pipe 2nd line - and 3rd line! 7, it is desecrated, and the 2nd conduit is closed.

When the central hydraulic control valve 2 is in an operating position other than the above, its first 'α path 24t connects the second branch 2 and the l/-th conduit λK; n1 the third ・D path J7 is closed.

The seventh pipe λ≠ is the main hydraulic electric valve 1], and 2/ is the discharge port 30 of the hydraulic pump 3/. The population 3.2 of this hydraulic pump 3/ is connected hydraulically to the hydraulic reservoir 20. Hydraulically connected.

Said main hydraulic control valve, 2/3rd conduit! 7 is connected to the hydraulic operation via the pressure line 33. Rudder device! Hiro's hydraulic control valve is connected to the first pipe r of O.

The third pipe line 27 of the main hydraulic control valve j/ is connected to the transportation device via the hydraulic system 3hiro. is connected to the hydraulic system l of the operating equipment, and this hydraulic system l is provided with a safety valve 3j. Ru.

The main hydraulic control valve 21 has two control chambers 3t and 37, and these '7 control chambers 3t and 37 7 are arranged on both sides of the main hydraulic control valve.

The pipe line 3r connects the g/control chamber 36 on the side of the spring λ3 to the hydraulic steering system. Connect to the λth pipe line of the hydraulic control valve B of the

The pipe 3 connects the second connection 37 on the opposite side of the spring to the pressure pipe 33. Ru.

The damper≠01≠7 is attached to the pipe line 3r13.

The hydraulic system further includes a hydraulic accumulator 4t2, and this accumulator≠ 2 has a hydraulic oil supply device≠3. This supply device 4L3 further includes a hydraulic pump 4tt. , the inlet 4'j of this hydraulic pump ++ is connected to the hydraulic reservoir 20, The discharge log 6 of this hydraulic pump 4'4' has a pipe line≠7, a reverse valve valve r, and a pipe line≠ri. It is read directly to the hydraulic accumulator 4t2 via the hydraulic accumulator 4t2.

The outlet FJ of the hydraulic pump≠≠ is a controlled hydraulic supply valve! The oil via O It is also connected to the pressure reservoir 2o. The pipe line si for controlling the hydraulic pressure supply valve jθ is The accumulator≠2 is connected to the conduit geta, and the accumulator≠2 is connected to the conduit srrg-, so that the accumulator It is connected to the G-th pipe line 2g of the main hydraulic control valve 21.

The hydraulic pump Hiro≠ is protected from being overloaded by a safety valve j3. , this safety valve j3 is installed between the hydraulic pipe line≠7 and j≠.

Also, the hydraulic system is a safety valve! The population of this safety valve SS is 6, which is the hydraulic pipe. The outlet j7 of this safety valve jfj is connected to the return line 3r. Ru.

When the steering system does not consume hydraulic oil, the hydraulic pump 3/ is used to pump the hydraulic oil. In a second embodiment of said hydraulic system, for delivering hydraulic fluid to the accumulator (FIG. 2). use a certain device.

In this case, the hydraulic steering system and the main hydraulic control valve 2/ are the same as those already described. It has a similar shape.

The hydraulic pressure supply device 4L3 has only a hydraulic pressure supply valve jO to be controlled; The pipe line 4'7 connected to the oil pressure supply valve in the manner described above is connected to the oil pressure supply valve by the pipe line 5g. , the main hydraulic control valve, and the third conduit 27 of 2/2 in the manner described above. child In the embodiment, the hydraulic bonder 4t (FIG. 1) is connected to the hydraulic pump 3/(FIG. 2). ), and this hydraulic pump 31 is operated by the third pipe line of the main oil control valve 21. , 27 and the pipe sr to be connected to the 'd route Gua. . Hydraulic steering, hydraulic oil consumption of the front structure is zero, and the accumulator 1. L, 2 is Even if the hydraulic pump 31 is filled with hydraulic oil, the hydraulic pump 31 can be used to In order to apply additional hydraulic pressure to the position 1 (third section), the third part 1 of the hydraulic system is Include 4 cases.

In this case, the shape of the hydraulic steering system≠ and the main hydraulic pressure 11jJ control valve 2/ has already been explained. It is similar to

The hydraulic pressure supply device 3 connects the hydraulic pressure supply valve 3, and the inlet of the hydraulic pressure supply valve is connected to the pipe line ≠ 7, it is connected to the hydraulic accumulator '72 via the check valve 4tg, and , and the conduit 5 are connected to the third conduit core of the city 1] control valve and 2/. tube The check valve B/ of the hydraulic system connects the hydraulic supply valve 5 to the hydraulic system I. This hydraulic system/is equipped with an additional hydraulic control system (4) together with hydraulic cylinder z3. 22, a hydraulic reservoir 20, and a conduit O. The hydraulic system/is a safety valve 3 Protected from overload by Party B.

Simplify the shape of the hydraulic control valve 6 (Fig. For this purpose, the third embodiment of the present invention will be used.

In this second embodiment, the hydraulic control valve 6 of the fourth control device V is located at the third position of Hiroji. It is a valve whose first positive path tφ is read directly to the first pipe 6≠ at the neutral position 6j, and the third pipe and the first conduit 6≠<.

The pipes x4t, ,<,r and the pipe AJ, 47 are connected to each other in the operating position 70. Ru.

Hydraulic pressure of this kind is arranged outside the former, for example, in the pipe 33 connected to the first pipe 6≠ of the hydraulic control unit 2. This conduit 33 is connected to the conduit 3K.

The first pipe line zz of the hydraulic control valve t is connected to the return public route l, and the third pipe line z7 and No. 6 g and No. 6 g are connected to working conduits 17 and 1, respectively.

The shape of such a hydraulic steering device is different from the steering device of the device shown in FIGS. 1 to 3. Can be combined with other equipment with necessary modifications.

The shape of the hydraulic control valve t (FIG. 5) is simplified to control the main hydraulic control valve 2/. The third embodiment of the present invention is used to reduce the flow rate of hydraulic fluid.

In this case, the hydraulic control valve 6 of the hydraulic steering system is a J-way 3-position valve; The first line 7/ of leads into the second line 73 in the neutral position 72. 3rd road 7g, 2nd H The path 73-1 and the first conduit 6≠ are blocked.

In the operating position 77, the first pipe line 7/ is idle and the second H line 73 is connected to the third pipe line 74t. and the first pipe 6≠ is the j-th pipe t It is connected to road 7t.

In an operating position other than the above, the first conduit 71 is closed and the second conduit 73 is connected to the μth conduit. The third pipe line 71/ is connected to the first pipe line 7AK.

In the hydraulic control valve 6 of this type, the throttle orifice 11 (FIG. 5) is the former It is disposed on the outside, for example, on the pipe line 7 connecting the pressure pipe line 33 to the pipe line 3t.

The first pipe line 71 of the hydraulic control non-2 is connected to the pipe line 31, and the second pipe line 73 is connected to the return pipe line 31. The third pipe line 7≠ and the first pipe line 6≠ are connected to the working pipe line /7, respectively. It is connected to the pressure line 33, and the first line 6≠ is connected to the pressure line 33.

This type of hydraulic steering device l is similar to the hydraulic steering device shown in FIGS. 1 to 3. Can be combined with other equipment by making necessary changes.

The hydraulic system for transportation equipment operates as follows.

At the neutral position 13 (Fig. 1) of the hydraulic control system ≠ of the hydraulic steering system ≠, the hydraulic fluid is from the reservoir 20 and is forced into the first passage of the hydraulic control valve 21 by the pump 31. The sliding member of the hydraulic control valve 21 is moved to position 2 by the action of the spring λ3. Ru. When the hydraulic control valve 2/ is in this position, the hydraulic pump 31 is in the first position. It is connected to the pressure line 33 via the second line 26 and is connected to the pressure line 33 via the second line 26. Muleta≠, lK is connected.

At the same time, the hydraulic oil passes through the pipe 3 to the hydraulic control valve and the control chamber 37 of 2/ flows to

The pressure rising in the control chamber 37 causes the sliding member 22 of the hydraulic control valve U/ to At this time, the accumulator 12 is moved to position -25 by the first conduit cog. Then, the connection with the hydraulic pump 3 is cut off.

When the hydraulic control valve ll is in this position 2jK, the hydraulic pump 3 is in the The hydraulic device l and the pressure pipe are connected to the hydraulic system l and the pressure pipe through the third pipe core of the hydraulic control valve 21 and the pipe line 3≠. It leads to Road 27.

When the operating equipment of the hydraulic system 1 is in a non-operating position, the hydraulic pump 31 is in a non-operating position. Do not apply any load to the hydraulic system. When the operating equipment of the hydraulic system rotates, the hydraulic pressure increases. Device 1 is loaded by pump 3. The safety device 37 is in the hydraulic system/ Prevent overloading of each device using known methods.

At this time, K, the accumulator≠2 is filled with hydraulic oil sent by the hydraulic pump≠≠. be done. That is, this hydraulic pump≠g passes the hydraulic oil through the pipe≠7 and the check valve≠g. It is then sent to the accumulator 4L2. When the pressure reaches a predetermined pressure The pressurizing valve, TO, is connected to the conduit 17 via the conduit j≠, and the accumulator The supply of hydraulic oil from Hiroko stops, and the load from the hydraulic pump l≠ is no longer received.

The check valve≠g interrupts the flow of hydraulic oil from the conduit Gua to the accumulator≠2. to prevent

Said steering wheel! is rotated, the hydraulic control valve 6 of the hydraulic steering device≠ is in the operating position. For example, position l≠.

At this operating position l≠, the control pipe 3r of the hydraulic control valve 2 is connected to the second hydraulic control valve A. It is connected to the third conduit through the conduit and has a throttle orifice! 1st pipe by evening Connects to road g. As a result, the first control chamber 36 of the hydraulic control valve 2 is connected to the operating pipe 1. 7 and the aperture orifice l! It is connected to the pressure line 33 via. this If so, the sliding member 22 of the hydraulic control valve 2/ will be in contact with the throttle orifice/j. In response to the differential pressure between the upstream side and the downstream side, the main hydraulic control valve 2 opens, and the hydraulic control valve 2 opens. t moves to various positions.

Therefore, the main hydraulic control valve 21 changes its position, and in this changed position the line 31 The connection with each device inside the hydraulic system 1 is cut off, and the pressure pipe 33 becomes hydraulically disconnected. Connected to pump 31.

The working conduit II is the first conduit // and the first! Connect to the return pipe via the pipe. Garu. The hydraulic fluid is sent to the hydraulic cylinder 2 via the pressure line 17, and the line is' and and is discharged into the reservoir 20 via the hydraulic control valve t.

The reversing device 7 returns the hydraulic control valve 6 to the neutral position 13, and the steered wheel j is free. become.

When the steering wheel is rotated quickly, the hydraulic control valve 6 changes from the neutral position to the above position. position 14L, thereby increasing the flow of hydraulic oil into the hydraulic cylinder 1 and reducing the throttle valve. The orifice lt is wide open, this aperture orifice! The differential pressure in the evening decreases, and accordingly The action of the sliding member 22 and the spring 23 in the control chamber 3t-37 of the hydraulic control valve 21 It moves to the position 22 by.

When the sliding member 22 comes to the position 29, the hydraulic steering device using hydraulic oil≠via the hydraulic cylinder The flow rate flowing into the tank 3 increases.

When the steering wheels are rotated at a certain speed, the force of the hydraulic pump 3 controls the transport device. As soon as the pulling force falls below the break the continuity. This connection is interrupted when pipe line 2 passes through the first pipe line 2g and the first pipe cog. Let's do it. Due to this.

The inflow speed of the hydraulic oil supplied to the steering device aVc increases.

When the hydraulic motor does not rotate the hydraulic pump 31, the hydraulic steering device μ Subsequently, hydraulic oil is supplied from the accumulator 4L2. Therefore, all of the transport equipment The operational reliability of the system is improved.

When the hydraulic control valve t reaches the end position 1ti-i (, Set it to 5 to avoid overloading the transportation device.

An emergency situation, that is, a failure of the hydraulic pump 31 may affect the operational reliability of the transportation device. When this happens, the device according to the invention has the advantage of being able to cope with this. This advantage is The oil supply pressure to the accumulator≠co and the rod 3 of the hydraulic cylinder co. The difference between the pressure required for the movement is balanced at the end of the hydraulic control valve 1, so that the The point is that the efficiency of the device according to the invention is extremely high.

The second embodiment according to the present invention is generally similar to the embodiment with the following differences: The hydraulic control valve 21 is in the position 2j, and the third pipe line 27 of the control valve 21 is in the position 2j. When connected to the pipe 4L7, the first pipe line of the main hydraulic control valve 21 is connected at that position. is connected to the third pipe line 27, and the working fluid is supplied from the hydraulic pump 31 to the hydraulic control It is supplied to the line≠7 via the valve λl and the line rr.

When draining hydraulic fluid from the accumulator≠2, the hydraulic fluid supply valve O is connected to the pipe≠ If the connection between 7 and pipe O t is cut off, hydraulic oil 1 will flow out from the hydraulic pump 31 and the hydraulic control It flows through the control valve l, the pipe jl-≠7, the reverse valve g, and the pipe≠2, and the The muleta becomes empty.

When the sliding member 22 of the main hydraulic control valve 21 moves to the position Hydraulic control valve, 2/3rd pipe of hydraulic oil from the hydraulic pump 3) to the accumulator The supply is cut off and the hydraulic fluid is forced into the hydraulic steering system l.

In this real example, the hydraulic pump 31 supplies hydraulic oil to the accumulator≠2, and the hydraulic When the supply of hydraulic oil from the pump to the steering gear is insufficient or completely interrupted, The accumulator may send hydraulic fluid to the steering system instead of the hydraulic pump. can.

The third embodiment of the invention is very similar to the second embodiment, except that the operation Fluid supply valve! A pipe line 6θ extending from the Since the hydraulic oil is connected to the position 2! Sliding of hydraulic control valve 2/ The hydraulic pump is operated by the member 22 and the accumulator≠2 filled with hydraulic oil. The transportation equipment hydraulic system IK flows from 31, and the flow path is through pipes F and 4'. 7. Hydraulic control valve 21 - the opened check valve and the conduit 60 of check valve 61 are passed through. Ru.

By moving the two sliding members of the hydraulic control valve 21 to the position 27, The hydraulic system for transportation equipment operates in the same manner as described above.

In this embodiment, hydraulic oil is not supplied to the steering device l, and the achievement regulator 12 is connecting the hydraulic pump 31 to the hydraulic system when filled with hydraulic oil; Therefore, the capacity of this hydraulic pump can be increased. Therefore, the hydraulic pump First, connect the pump 31 to the steering system via the hydraulic control valve l, and then connect it to the steering system≠. (When hydraulic oil is not supplied) The hydraulic pump 31 is supplied with hydraulic oil with an achievreator≠2. connection to the supply device 13, and then (the hydraulic oil does not flow to the steering device 1 and one accumulator ) If the hydraulic pump 3/ is filled with the hydraulic oil supply device ≠ 3 and the check valve 61. It is connected to the hydraulic system l via the hydraulic system l.

The second and third embodiments are independent of the type of hydraulic control non-A of the hydraulic steering system. It can operate easily.

In the case of the hydraulic system shown in FIG. Throttle orifice l provided outside A! including the action flowing to this hydraulic steering device μ. The entire amount of hydraulic oil passes through the throttle orifice is. of the working fluid of the hydraulic steering device. When the consumption increases, that is, when the hydraulic control valve 6 is at the end position, When the pressure in pipe 3g rises, the sliding member of hydraulic control valve J/ is in position. 27, switch the hydraulic pump 31 from line 3≠ to pressure line 33, and this pressure The pipe line 33 leads to the hydraulically operated valve B of the hydraulic steering system≠.

The control pipe 3r is connected to the reservoir 2° via the hydraulic control valve 6, and the hydraulic steering system≠ As soon as the hydraulic pressure control valve t returns to the neutral position 6ta, the pressure in the control line 3g decreases, and the hydraulic pressure The two sliding members of the control valve 21 move to the above-mentioned position 2, and the hydraulic pump 3 releases hydraulic oil. A part of the hydraulic oil is discharged through the hydraulic control valve 6, and a part of the hydraulic oil is supplied to the hydraulic system l. do.

The advantage of this embodiment is that the shape of the hydraulic control unit A of the hydraulic steering system μ is simple and The above-mentioned hydraulic steering system can be improved in any number of ways.

The embodiment shown in FIG. 5 has a throttle orifice /j, which Disposed outside the hydraulic control valve t or between the pressure line 33 and the control line 3, A small portion of the hydraulic fluid is sent to the hydraulic steering system≠.

If the hydraulic oil of this hydraulic steering system is not consumed at all, the pressure pipe 33 is connected to the control The pressure is higher than that of the control pipe 3r, and a reservoir 20 is connected to this pipe 3 via a hydraulic control valve 6. connected to. Accordingly, the hydraulic control valve 2/ moves to the position jK.

As a result, the hydraulic fluid flows from the hydraulic pump 31 to the hydraulic device l, and this hydraulic fluid A very small amount of the body exits into the reservoir 20 via the throttle orifice lj.

When the hydraulic control valve t moves from the neutral position to any operating position of 77°7g. In this case, the control line 3r is cut off from the return line 3r, so that this control line 31 The pressure at i' increases, and the sliding member 22 of the hydraulic control valve 21 moves to the position 2FK. do.

In such a case, the hydraulic pump 3 is connected to the pressure line 33 and connected to the hydraulic system. It is connected to the population l and is no longer connected to the i pipe 34L.

Since the hydraulic steering device has a simple shape, the hydraulic control valve This has five advantages in that the consumption of hydraulic oil required for controlling the engine is extremely small.

The hydraulic system for the transportation device improves the operating signal and makes the control of the transportation device easier. make it easier

Industrial applicability The present invention is mainly applicable to road construction equipment, agricultural equipment, and hydraulic systems for tractors. The hydraulic steering system and equipment in the hydraulic system of these systems are This is useful when combining into one hydraulic system.

Fil;:, ,3 international search report Continuation of page 1 Founder: Kalmykov, Fyacheslav Nikolaevich 0 shots clear person Sei, Wassily Pavlowitsch So? Country E 123242, Moscow, Uritsa, Bolshaya Gruzinskaya , Dee, 12. Power-Vee, 81 Soviet Union 220015. Minsk, Uri Tsa, ya, mavra, dee.

26 Carve'ney, 47

Claims (1)

[Claims] l.Transportation equipment that includes a hydraulic mechanism for steering and a hydraulic mechanism for operating equipment, and that mounts said mechanism. Hydraulic cylinders mechanically connected to the components to be controlled at the is connected to the mechanism and is connected to and returns to the hydraulic cylinder by a hydraulic path of the operating system. a hydraulic steering mechanism, each hydraulically connected to a hydraulic reservoir by a conduit; It has a two-position valve type main hydraulic control valve that is hydraulically controlled and has a sliding member attached with a screw. , a first pipe line and a λ-th pipe line are attached to the position of one valve of this main hydraulic control valve, and the first pipe line and the The conduit and the second conduit and the third conduit are connected to each other at other positions, and the co-position valve type main The first line of the hydraulic control valve is connected to the outlet of the hydraulic pump, and the inlet of the hydraulic pump is connected to the outlet of the hydraulic pump. connected to the reservoir, and the second conduit is connected to the hydraulic steering mechanism by a pressure conduit. connected, the third conduit is connected to the hydraulic mechanism for operating equipment, and the main hydraulic control The first control chamber on the side of the valve where the spring is located is in hydraulic communication with the steering hydraulic mechanism. This cooperation is performed because the first control room operates the steering hydraulic mechanism. a suitable operating conduit in the dynamic position and a return conduit in the neutral position of the steering hydraulic mechanism. In a hydraulic system for a transportation device in which the second control chamber cooperates with the pressure line, The q-th pipe (2g) is attached to the hydraulically controlled two-position valve type main hydraulic control valve (2/). This μth pipe is connected to the main hydraulic control valve (2) at the position (2) of the main hydraulic control valve (2). It communicates with the first pipe line and the λ-th pipe line, but at another valve position (it does not communicate with the 2 valves, and the μ-th pipe line A hydraulic accumulator (J2) is added to the pipeline, and this accumulator supplies hydraulic fluid. Accompanied by a supply mechanism (13), this hydraulic oil supply mechanism is connected to other hydraulic pumps (GS) and controls. a hydraulic oil supply valve (!0) controlled by the hydraulic pump; hydraulically cooperates with the outlet (≠≦) of the pump, and the said hydraulic pressure through the check valve (≠). Accumulator (≠2) and the hydraulically controlled co-position valve type main hydraulic control valve (1 ))), but the outlet of the hydraulic oil supply valve is located at the front. A hydraulic system for a transportation device, characterized in that it works together with the hydraulic reservoir (2o). 2.Including hydraulic systems for steering and hydraulic systems for operating equipment. one or more components mechanically cooperating with a controlled component of the transportation device on which the hydraulic mechanism is mounted; The upper hydraulic cylinder is linked to the steering wheel and the reverse mechanism connected to the joint. to the hydraulic cylinder by an actuation line and to the hydraulic reservoir by a return line. A hydraulic steering mechanism that hydraulically cooperates with the main hydraulic control valve, which is a one-position valve type that is hydraulically controlled. the main hydraulic control valve has a spring loaded sliding member; A first pipe line and a second pipe line are attached to the position of one valve of the hydraulic control valve, and the first pipe line and The second conduit and the third conduit are connected to each other at another location. The first pipe line of the hydraulically controlled two-position valve type main hydraulic control valve is connected to the output of the hydraulic pump. the hydraulic pump is connected to the hydraulic reservoir and the hydraulic pump is connected to the hydraulic reservoir; The λ line is connected to the hydraulic steering mechanism by a pressure line device, and is connected to the side of the spring. A first control room is arranged in hydraulic cooperation with the hydraulic steering mechanism, and this cooperation is with the first control room. 1 when the control room is in communication with the appropriate operating conduits of the various operating positions of the hydraulic steering wheel A. and the second control chamber is in a hydraulic system for a transportation device hydraulically cooperating with the pressure pipe. , the hydraulically controlled co-position valve type main hydraulic control valve (21) is connected to the μth pipe (-2g). is added, and this μth pipe is located at the position of one valve (25) of the main hydraulic control valve (2). ’) to the first and second pipes (, 2g, 2o), but the position of the other valve ( , 2), and the above-mentioned wide conduit is additionally connected to the hydraulic gear x motor (g2). 1. This hydraulic achievator has a hydraulic oil supply mechanism (J3), and this hydraulic oil supply mechanism (J3) The supply mechanism includes a controlled hydraulic oil supply valve (O), and the inlet of this hydraulic oil supply valve is It hydraulically cooperates with the third conduit of the main hydraulic control valve (2/), and also has a check valve (gf ) through the hydraulic accumulator (4L-2) and the main hydraulic control valve (21). The first conduit (2g) of the hydraulic reservoir (20) and the outlet thereof cooperate with the hydraulic reservoir (20). A hydraulic system for transportation equipment, characterized by: 3.Including hydraulic systems for steering and hydraulic systems for operating equipment. one or more components mechanically cooperating with a controlled component of the transportation device on which the hydraulic mechanism is mounted; The upper hydraulic cylinder is linked to the steering wheel and the reverse mechanism connected to the joint. oil to said hydraulic cylinder by a working line and to the hydraulic reservoir by a return line. A hydraulic steering mechanism that works together with a hydraulically controlled two-position main hydraulic control valve. - The main oil pressure control valve has a spring loaded sliding member and the main oil pressure control valve has a spring loaded sliding member. The control valve has a first pipe line and a second pipe line at one of the square positions, and the first and second pipe lines are connected to each other. The conduit and the third conduit are interconnected at another location, and the hydraulically controlled two-position valve type The first line of the main hydraulic control valve is connected to the outlet of the hydraulic pump, and the first line of the main hydraulic control valve is connected to the outlet of the hydraulic pump. the reservoir is connected to the hydraulic reservoir, and the second line is connected to the hydraulic reservoir by means of a pressure line arrangement. A first control chamber connected to the hydraulic steering mechanism and disposed on the side of the spring is connected to the hydraulic steering mechanism. hydraulically cooperating with said hydraulic steering mechanism when communicating with the appropriate operating conduit of the steering mechanism; The control room is a hydraulic system for a transportation device that hydraulically cooperates with the pressure pipe. The pressure-controlled co-position valve type main hydraulic control valve (21) is equipped with a No. 1 pipe (2Ir). This μth pipe is connected to the main hydraulic control valve (21) at the position (2j) of the first valve. It leads to the first and second conduits (2≠, 26) but is closed at other positions (2), and the front The f-th pipe additionally has a hydraulic arm v-, g (≠2), and this hydraulic arm The regulator has a hydraulic oil supply mechanism (G3), and this hydraulic oil supply mechanism is operated by a controlled operation. It has a hydraulic oil supply valve (j7), and the population of this hydraulic oil supply valve is the same as the main hydraulic control valve (2). ) works together with the third passage (27) of the hydraulically cooperates with the mulator (lA, 2) and the first pipe line of the main hydraulic control valve (11). However, the outlet is connected to the hydraulic system (1) for the operating equipment through another check valve (6)). A hydraulic device for transportation equipment characterized by cooperating with a mouth. 1. The hydraulic steering having a throttle orifice and including a three-position valve type hydraulic control valve The mechanism is such that the throttle orifice (it) is connected to the oil of the hydraulic steering device (≠). A control chamber (3z, 37) of the main hydraulic control valve (21) outside the pressure control valve (A) According to any one of claims 1 to 3, characterized in that the Hydraulic equipment for transportation equipment. ! , the hydraulic control valve (6) of the hydraulic steering mechanism (≠) is a gway valve, and this valve is in the neutral state. When in position (6), the first pipe line (tl/-) and the second pipe line (6t) are in contact with each other. The third pipe line (67) and the μth pipe line (+, r) are closed, and the hydraulic control valve The first pipe line (6≠) of (X) is the pressure pipe line (33) of the master main hydraulic control valve (2/). The second pipe (t6) is connected to the return pipe (/), and the second pipe (t6) is connected to the return pipe (/), and the second pipe (t6) is connected to the return pipe (/). The third and ≠ pipe line (67, gr) are connected to the working pipe line (/7, /f). A hydraulic system for a transportation device according to claim 1, characterized in that: t, the hydraulic control valve (B) of the hydraulic steering system (L) is a yūro valve, and its neutral position (72), the first pipe line [71] and the second pipe line (73) are connected to each other, and the third pipe line First! The pipes (7≠ to 77) are closed, and the hydraulic control of the hydraulic steering device (≠) is performed. The first pipe line (71) of the valve (6) is connected to the first control chamber (3B) of the main hydraulic control valve (21). K is connected and the th! Conduit ( 7B), and this j-th pipe (7t) is connected to the pressure pipe (33), The second pipe line (73) is connected to the return pipe line (l), and the third pipe line (7≠ ) and the μth pipe (7) are connected to the hydraulic pressure pipe (17, l). A hydraulic system for a transportation device according to claim 1.