CN217401329U - Travel control system and work machine - Google Patents
Travel control system and work machine Download PDFInfo
- Publication number
- CN217401329U CN217401329U CN202221071871.9U CN202221071871U CN217401329U CN 217401329 U CN217401329 U CN 217401329U CN 202221071871 U CN202221071871 U CN 202221071871U CN 217401329 U CN217401329 U CN 217401329U
- Authority
- CN
- China
- Prior art keywords
- oil
- valve
- pilot
- walking
- pilot port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model relates to a hydraulic control field provides a walking control system and operation machinery, wherein, walking control system, include: switching the working position of the first reversing valve to lead pilot oil to be led into one of the first pilot port group of the first walking main valve unit; and switching the working position of the second reversing valve to lead one of the second pilot port groups of the second walking main valve coupling to be introduced with pilot oil. Be used for solving among the prior art pedal pilot valve fault rate high, it is with high costs, the defect of running gear's of being not convenient for control, the utility model provides a walking control system, through the switching of first switching-over valve to first walking main valve antithetical couplet to realize advancing and retreating of a running gear, through the switching of second switching-over valve to second walking main valve antithetical couplet, realize advancing and retreating of another running gear, first switching-over valve and second switching-over valve simple structure, the fault rate is low, and is with low costs, to running gear's control easy operation.
Description
Technical Field
The utility model relates to a hydraulic control technical field especially relates to a walking control system and operation machinery.
Background
At present, most of common hydraulic traveling control systems of engineering mechanical excavators control a main valve through a pedal pilot valve so as to respectively control the engineering mechanical excavator to travel left and right; the pedal pilot valve is a two-position one-way pressure reducing valve, has a single function, and can be put into use only by integrating four-way valves into an assembly valve body for controlling left and right traveling motors of the excavator to travel back and forth.
The pedal pilot valve has high failure rate, the valve body is complex to process, and four valve cores are required to be combined for use in the control of the traveling mechanism; the valve body is complicated in design, high in cost and not beneficial to batch production.
SUMMERY OF THE UTILITY MODEL
The utility model provides a walking control system and operation machinery for it is high to solve among the prior art pedal pilot valve fault rate, and valve body processing is complicated, with high costs, and the defect of running gear's control of being not convenient for realizes the pilot control of first switching-over valve and second switching-over valve to first walking main valve antithetical couplet, second walking main valve antithetical couplet, thereby realizes the control to running gear, simple structure, and the fault rate is low, and is with low costs, to running gear's control easy operation.
The utility model provides a walking control system, include:
a first travel master valve train including a first pilot port set;
the second walking main valve unit comprises a second pilot port group;
the first reversing valve comprises a first oil outlet group, the first pilot port group is connected with the first oil outlet group, and pilot oil is introduced into one of the first pilot port group by switching the working position of the first reversing valve;
and the second reversing valve comprises a second oil outlet group, the second pilot port group is connected with the second oil outlet group, and the working position of the second reversing valve is switched to enable one of the second pilot port group to be communicated with the pilot oil.
According to the utility model provides a walking control system, the first guide mouth group includes first guide mouth and second guide mouth, the first oil-out group includes first oil-out and second oil-out;
the first oil outlet is connected with the first pilot port, the second oil outlet is connected with the second pilot port, and the switching of the working positions of the first reversing valve enables the first pilot port to be communicated with pilot oil or the second pilot port to be communicated with pilot oil.
According to the utility model provides a walking control system, the second guide mouth group includes third guide mouth and fourth guide mouth, the second oil-out group includes third oil-out and fourth oil-out;
the third oil outlet is connected with the third pilot port, the fourth oil outlet is connected with the fourth pilot port, and the working position of the second reversing valve is switched to enable the third pilot port to be communicated with pilot oil or the fourth pilot port to be communicated with pilot oil.
According to the utility model provides a walking control system, the first reversing valve includes first oil inlet and first oil return mouth, first oil inlet is used for being connected with guide's oil source, first oil return mouth is used for being connected with the oil tank;
when the first reversing valve is in a first working position, the first oil inlet is communicated with the first oil outlet, and the second oil outlet is communicated with the first oil return port;
and when the first reversing valve is in a second working position, the first oil inlet is communicated with the second oil outlet, and the first oil outlet is communicated with the first oil return port.
According to the utility model provides a walking control system, the second switching-over valve includes second oil inlet and second oil return opening, the second oil inlet is used for being connected with guide's oil source, the second oil return opening is used for being connected with the oil tank;
when the second reversing valve is in a third working position, the second oil inlet is communicated with the third oil outlet, and the fourth oil outlet is communicated with the second oil return port;
and when the second reversing valve is in a fourth working position, the second oil inlet is communicated with the fourth oil outlet, and the third oil outlet is communicated with the second oil return port.
According to the utility model provides a walking control system, still include first walking motor and second walking motor, first walking motor with first walking main valve antithetical couplet is connected, second walking motor with second walking main valve antithetical couplet is connected;
the switching of the working position of the first walking main valve unit enables the first walking motor to rotate forwards or backwards, and the switching of the working position of the second walking main valve unit enables the second walking motor to rotate forwards or backwards.
According to the utility model provides a walking control system, first walking master valve antithetical couplet includes first main valve core and first compensating valve, first main valve core includes first liquid accuse mouth group, first liquid accuse mouth group with first guide mouth group link is used for letting in the guide oil;
an oil outlet of the first compensation valve is connected with an oil inlet of the first main valve element, and an oil inlet of the first compensation valve is used for connecting pressure oil.
According to the utility model provides a walking control system, the second walking main valve allies oneself with including second main valve core and second compensating valve, the second main valve core includes second liquid accuse mouth group, the second liquid accuse mouth group with the second pilot port group link, be used for letting in the pilot oil;
an oil outlet of the second compensation valve is connected with an oil inlet of the second main valve element, and an oil inlet of the second compensation valve is used for being connected with the pressure oil.
According to the utility model provides a walking control system, the oil-out of first compensating valve communicates with the oil inlet of second main valve core;
and a throttle valve is arranged between an oil outlet of the first compensation valve and an oil inlet of the second main valve element.
The utility model also provides an operation machine, including foretell walking control system.
The utility model provides a walking control system, through the switching of first switching-over valve to first walking main valve antithetical couplet to realize advancing and retreating of left running gear, through the switching of second switching-over valve to second walking main valve antithetical couplet, realize advancing and retreating of right running gear, first switching-over valve and second switching-over valve simple structure, the fault rate is low, and is with low costs, to running gear's control easy operation.
The utility model provides a walking control system sets up the choke valve between the oil-out through first compensating valve and the oil inlet of second main valve core, and when the load unbalance of first walking motor and second walking motor, accessible choke valve redistribution two first main valve cores have ensured first walking motor and second walking motor pivoted synchronism to the oil pressure of first walking motor output.
The first reversing valve and the second reversing valve can control the left travelling mechanism and the right travelling mechanism to travel respectively, and can also control the left travelling mechanism and the right travelling mechanism to move forwards or backwards simultaneously; under any road condition, the left traveling mechanism and the right traveling mechanism can be controlled to move forwards or backwards simultaneously.
Further, the present invention provides a working machine having the travel control system described above, and therefore having various advantages as described above.
Drawings
In order to illustrate the technical solutions of the present invention or the prior art more clearly, the drawings used in the following embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a hydraulic schematic diagram of a walking control system provided by the present invention;
fig. 2 is a hydraulic schematic diagram of the first walking main valve train and the second walking main valve train provided by the utility model.
Reference numerals:
100: a first walking main valve unit; 101: a first pilot port; 102: a second pilot port; 110: a first main spool; 120: a first compensation valve; 130: a throttle valve; 111: a first hydraulic control port; 112: a second hydraulic control port; 113: a first working oil port; 114: a first relief port; 115: a first compensation port; 116: a first compensation outlet; 117: a second working oil port; 118: a third working oil port; 121: a fourth working oil port; 122: a fifth working oil port; 200: a second walking main valve unit; 201: a third pilot port; 202: a fourth pilot port; 210: a second main spool; 220: a second compensation valve; 211: a sixth working oil port; 212: and a seventh working oil port.
300: a first direction changing valve; 301: a first oil outlet; 302: a second oil outlet; 303: a first oil inlet; 304: a first oil return port; 310: a first travel motor; 400: a second directional control valve; 401: a third oil outlet; 402: a fourth oil outlet; 403: a second oil inlet; 404: a second oil return port; 410: a second travel motor.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Embodiments of the present invention will be described below with reference to fig. 1 to 2. It is to be understood that the following are merely exemplary embodiments of the present invention and are not intended to limit the present invention.
As shown in fig. 1, the utility model provides a walking control system, include: the system comprises a first walking main valve train 100, a second walking main valve train 200, a first reversing valve 300 and a second reversing valve 400, wherein the first walking main valve train 100 comprises a first pilot port group; the second travel master linkage 200 includes a second pilot port set; the first reversing valve 300 comprises a first oil outlet group, a first pilot port group is connected with the first oil outlet group, and pilot oil is introduced into one of the first pilot port group by switching the working positions of the first reversing valve 300; the second reversing valve 400 includes a second oil outlet group, a second pilot port group is connected to the second oil outlet group, and switching of the working position of the second reversing valve 400 causes one of the second pilot port groups to be supplied with pilot oil. The first direction valve 300 and the second direction valve 400 may be mechanical direction valves or electromagnetic direction valves.
Specifically, the first traveling main valve train 100 is supplied with pilot oil through one of the first pilot port groups to switch the working position of the first traveling main valve train 100, and thus to switch the forward and reverse rotation of the first traveling motor 310; similarly, the second traveling main valve train 200 switches the operation of the second traveling main valve train 200 by introducing the pilot oil through one of the second pilot port groups, thereby completing the switching of the forward and reverse rotation of the second traveling motor 410.
For the purpose of selectively introducing the pilot oil to one of the first pilot port groups of the first travel master linkage 100 by switching the first direction changing valve 300, the first direction changing valve 300 may be changed by hand or by other mechanical methods, so as to realize the forward or backward movement of the left travel mechanism controlled by the first travel motor 310.
Similarly, for the second directional valve 400 to switch to selectively introduce pilot oil into one of the second pilot port groups of the second main walking valve train 200, the second directional valve 400 may be switched manually or mechanically, so that the second walking motor 410 controls the right walking mechanism to move forward or backward. The first direction valve 300 and the second direction valve 400 can be operated independently or simultaneously; under any road condition, the left traveling mechanism and the right traveling mechanism can be controlled to move forwards or backwards simultaneously. The first reversing valve 300 and the second reversing valve 400 have low failure rate, low cost and simple after-sales service, and have higher practicability and competitiveness.
Further, in other embodiments of the present invention, the walking control system further includes a first walking motor 310 and a second walking motor 410, the first walking motor 310 is connected to the first walking master valve train 100, and the second walking motor 410 is connected to the second walking master valve train 200; the switching of the operation position of the first travel master linkage 100 causes the first travel motor 310 to rotate forward or backward, and the switching of the operation position of the second travel master linkage 200 causes the second travel motor 410 to rotate forward or backward. The first travel motor 310 is used to control the forward and backward movement of the left travel mechanism, and the second travel motor 410 is used to control the forward and backward movement of the right travel mechanism.
With continued reference to fig. 1, in an embodiment of the present invention, the first pilot port set includes a first pilot port 101 and a second pilot port 102, and the first oil outlet set includes a first oil outlet 301 and a second oil outlet 302; the first oil outlet 301 is connected with the first pilot port 101, the second oil outlet 302 is connected with the second pilot port 102, and the working position of the first reversing valve 300 is switched to enable the first pilot port 101 to be communicated with pilot oil or the second pilot port 102 to be communicated with pilot oil.
That is to say, the first direction valve 300 realizes the switching of the working position through the mechanical handle, so that the pilot oil is introduced into the first oil outlet 301 or the second oil outlet 302. The switching of the operating position of the first switching valve 300 realizes the switching of the operating position of the first traveling main valve train 100, thereby controlling the forward or backward movement of the left traveling mechanism. For example, the first outlet port 301 passes pilot oil into the first pilot port 101, at which time the second pilot port 102 is connected to and relieved from the second outlet port 302. The first pilot port 101 obtains a pilot oil signal, so that the first traveling main valve train 100 is reversed, the first traveling motor 310 rotates forward, and the left traveling mechanism advances; the left travel mechanism is retracted, and similarly the second outlet port 302 leads the pilot oil to the second pilot port 102.
Further, in another embodiment of the present invention, the second pilot port group includes a third pilot port 201 and a fourth pilot port 202, and the second oil outlet group includes a third oil outlet 401 and a fourth oil outlet 402; the third oil outlet 401 is connected to the third pilot port 201, the fourth oil outlet 402 is connected to the fourth pilot port 202, and the working position of the second directional valve 400 is switched so that the third pilot port 201 is filled with pilot oil or the fourth pilot port 202 is filled with pilot oil.
That is to say, the second direction valve 400 realizes the switching of the working position through the mechanical handle, so that the third oil outlet 401 or the fourth oil outlet 402 is led with pilot oil. The switching of the working position of the second directional valve 400 realizes the switching of the working position of the second traveling main valve train 200, thereby controlling the forward or backward movement of the right traveling mechanism. For example, the third outlet port 401 passes pilot oil into the third pilot port 201, at which time the fourth pilot port 202 is connected to and relieved of load from the fourth outlet port 402. The third pilot port 201 obtains a pilot oil signal, so that the second traveling main valve train 200 is reversed, the second traveling motor 410 rotates forward, and the right traveling mechanism advances; the same reason for the fourth outlet port 402 to pass pilot oil to the fourth pilot port 202 is that the right travel mechanism is backed off.
Furthermore, in an optional embodiment of the present invention, the first direction valve 300 comprises a first oil inlet 303 and a first oil return 304, the first oil inlet 303 is used for connecting with a pilot oil source, and the first oil return 304 is used for connecting with an oil tank; when the first reversing valve 300 is in the first working position, the first oil inlet 303 is communicated with the first oil outlet 301, and the second oil outlet 302 is communicated with the first oil return port 304; when the first reversing valve 300 is in the second working position, the first oil inlet 303 is communicated with the second oil outlet 302, and the first oil outlet 301 is communicated with the first oil return port 304.
In other words, the first direction valve 300 includes a first operation position, a second operation position, and a neutral position, and when the first travel master linkage 100 is not required to be controlled, the first direction valve 300 is in the neutral off state, and when the operation position of the first travel master linkage 100 is required to be switched, the first direction valve 300 is in the first operation position or the second operation position. For example, when the first direction valve 300 is in the first operating position, the first oil inlet 303 is communicated with the first oil outlet 301 to supply pilot oil, the second oil outlet 302 is communicated with the first oil return port 304 to unload, and the first oil outlet 301 supplies pilot oil to the first pilot port 101, so as to switch the first traveling main valve linkage 100. That is, the first direction valve 300 may be a three-position, four-way manual direction valve.
In addition, in another optional embodiment of the present invention, the second direction valve 400 includes a second oil inlet 403 and a second oil return 404, the first oil inlet 303 is used for connecting with a pilot oil source, and the second oil return 404 is used for connecting with an oil tank; when the second reversing valve 400 is in the third working position, the second oil inlet 403 is communicated with the third oil outlet 401, and the fourth oil outlet 402 is communicated with the second oil return port 404; when the second direction valve 400 is at the fourth working position, the second oil inlet 403 is communicated with the fourth oil outlet 402, and the third oil outlet 401 is communicated with the second oil return port 404.
In other words, the second direction valve 400 includes a third operating position, a fourth operating position, and a neutral position, and when the second travel master linkage 200 does not need to be controlled, the second direction valve 400 is in the neutral off state, and when the operating position of the second travel master linkage 200 needs to be switched, the second direction valve 400 is set to the third operating position or the fourth operating position. For example, when the second directional valve 400 is in the third operating position, the second oil inlet 403 is communicated with the third oil outlet 401 to supply pilot oil, the fourth oil outlet 402 is communicated with the second oil return port 404 to unload, and the third oil outlet 401 supplies pilot oil to the third pilot port 201, so that the second traveling main valve train 200 is switched. That is, the second reversing valve 400 may be a three-position, four-way manual reversing valve.
As shown in fig. 2, in an embodiment of the present invention, the first traveling main valve train 100 includes a first main valve element 110 and a first compensation valve 120, the first main valve element 110 includes a first pilot port 111 group, and the first pilot port 111 group is connected to the first pilot port group for introducing pilot oil; an oil outlet of the first compensation valve 120 is connected with an oil inlet of the first main valve element 110, and an oil inlet of the first compensation valve 120 is used for connecting pressure oil.
Further, in another embodiment of the present invention, the second traveling main valve train 200 includes a second main valve core 210 and a second compensation valve 220, the second main valve core 210 includes a second hydraulic control port 112 set, and the second hydraulic control port 112 set is connected to the second pilot port set for introducing pilot oil; an oil outlet of the second compensation valve 220 is connected with an oil inlet of the second main valve element 210, and an oil inlet of the second compensation valve 220 is used for connecting pressure oil.
The first traveling master linkage 100 has the same structure as the second traveling master linkage 200, and the operation principle and the control process are the same. For the first travel master linkage 100, the first master spool 110 of the first travel master linkage 100 includes a first hydraulic port 111, a second hydraulic port 112, a first working port 113, a first unloading port 114, a first compensation port 115, a first compensation outlet 116, a second working port 117, and a third working port 118. The first hydraulic control port 111 is communicated with the first pilot port 101, the second hydraulic control port 112 is communicated with the second pilot port 102, the first unloading port 114 is communicated with the oil tank, the first compensation port 115 is connected with a main pump pressure oil source, and the second working oil port 117 and the third working oil port 118 are respectively connected with the first traveling motor 310.
The first compensation valve 120 includes a fourth working port 121 and a fifth working port 122, the first compensation oil outlet is connected to the fourth working port 121, the fifth working port 122 is connected to the first working port 113, and the first compensation port 115 is communicated with the first compensation outlet 116 in a state that the first main valve element 110 is switched. For example, when pilot oil enters the first pilot port 111 of the first main valve element 110, the first main valve element 110 is switched to the fifth operating position, and at this time, the first compensation port 115 communicates with the first compensation outlet 116, the first relief port 114 communicates with the second working port 117, and the first working port 113 communicates with the third working port 118. The pressure oil of the main pump pressure oil source enters the fourth working port 121 of the first compensating valve 120 from the first compensating port 115 and the first compensating outlet 116, flows into the first working port 113 through the fifth working port 122 by the compensation of the first compensating valve 120, and is supplied to the first traveling motor 310 through the third working port 118.
Similarly, when pilot oil enters the second control port 112 of the first main spool 110, the first main spool 110 switches to the sixth operating position, and the first compensation port 115 and the first compensation outlet 116 are still connected. That is, the pressure entering the first main spool 110 needs to be compensated by the first compensation port 115 and the first compensation outlet 116 before entering the first compensation valve 120, and then the first travel motor 310 is supplied with oil after returning to the first main spool 110.
The connection and operation of second main spool 210 and second makeup valve 220 are the same as first main spool 110 and first makeup valve 120. In a state that the second main spool 210 supplies oil to the second travel motor 410, main-pump pressure oil first passes through the second compensation valve 220 for compensation and then enters the second main spool 210, that is, the sixth working oil port 211 of the second main spool 210 is communicated with the seventh working oil port 212 of the second compensation valve 220, so that the pressure oil flows back to the second main spool 210 from the second compensation valve 220.
Additionally, in an optional embodiment of the present invention, the oil outlet of the first compensation valve 120 is communicated with the oil inlet of the second main valve element 210; and a throttle valve 130 is arranged between the oil outlet of the first compensation valve 120 and the oil inlet of the second main valve element 210. In other words, the fifth working port 122 of the first compensating valve 120 is connected to the sixth working port 211 of the second main spool 210, thereby connecting the first traveling main valve train 100 and the second traveling main valve train 200, and the throttle 130 is provided. When the loads of the first travel motor 310 and the second travel motor 410 are unbalanced, the oil pressures output from the two first main spools 110 to the first travel motor 310 may be redistributed by the throttle 130, thereby ensuring the synchronism of the rotation of the first travel motor 310 and the second travel motor 410.
The utility model also provides an operation machine, including the walking control system of above-mentioned embodiment. The working machine may be an engineering machine such as a crane, an excavator, a pile machine, or an engineering vehicle such as a climbing truck, a fire truck, or a mixer truck.
The utility model provides a walking control system through the switching of first switching-over valve 300 to first walking main valve antithetical couplet 100 to realize advancing and retreating of a running gear, through the switching of second switching-over valve 400 to second walking main valve antithetical couplet 200, realize advancing and retreating of another running gear, first switching-over valve 300 and second switching-over valve 400 simple structure, the fault rate is low, and is with low costs, to running gear's control easy operation.
The utility model provides a walking control system sets up choke valve 130 between the oil-out through first compensating valve 120 and the oil inlet of second main valve element 210, and when the load unbalance of first walking motor 310 and second walking motor 410, accessible choke valve 130 redistributes the oil pressure of two first main valve elements 110 to first walking motor 310 output, has ensured first walking motor 310 and second walking motor 410 pivoted synchronism.
The utility model provides a walking control system, the first reversing valve 300 and the second reversing valve 400 can control the left walking mechanism and the right walking mechanism to walk respectively, and can also control the left walking mechanism and the right walking mechanism to move forwards or backwards simultaneously; under any road condition, the left traveling mechanism and the right traveling mechanism can be controlled to move forwards or backwards simultaneously.
Further, the present invention provides a working machine having the travel control system described above, and therefore having various advantages as described above.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A walking control system, comprising:
a first travel master valve train including a first pilot port set;
the second walking main valve unit comprises a second pilot port group;
the first reversing valve comprises a first oil outlet group, the first pilot port group is connected with the first oil outlet group, and pilot oil is introduced into one of the first pilot port group by switching the working position of the first reversing valve;
and the second reversing valve comprises a second oil outlet group, the second pilot port group is connected with the second oil outlet group, and the working position of the second reversing valve is switched to enable one of the second pilot port group to be communicated with the pilot oil.
2. The walking control system of claim 1, wherein the first pilot port set comprises a first pilot port and a second pilot port, the first oil outlet set comprises a first oil outlet and a second oil outlet;
the first oil outlet is connected with the first pilot port, the second oil outlet is connected with the second pilot port, and the switching of the working positions of the first reversing valve enables the first pilot port to be communicated with pilot oil or the second pilot port to be communicated with pilot oil.
3. The walking control system of claim 1 or 2, wherein the second set of pilot ports comprises a third pilot port and a fourth pilot port, and the second set of oil outlets comprises a third oil outlet and a fourth oil outlet;
the third oil outlet is connected with the third pilot port, the fourth oil outlet is connected with the fourth pilot port, and the working position of the second reversing valve is switched to enable the third pilot port to be communicated with pilot oil or the fourth pilot port to be communicated with pilot oil.
4. The walking control system of claim 2, wherein the first directional control valve comprises a first oil inlet and a first oil return, the first oil inlet is used for being connected with a pilot oil source, and the first oil return is used for being connected with an oil tank;
when the first reversing valve is in a first working position, the first oil inlet is communicated with the first oil outlet, and the second oil outlet is communicated with the first oil return port;
and when the first reversing valve is in a second working position, the first oil inlet is communicated with the second oil outlet, and the first oil outlet is communicated with the first oil return port.
5. The walking control system of claim 3, wherein the second directional control valve comprises a second oil inlet and a second oil return, the second oil inlet is used for being connected with a pilot oil source, and the second oil return is used for being connected with an oil tank;
when the second reversing valve is in a third working position, the second oil inlet is communicated with the third oil outlet, and the fourth oil outlet is communicated with the second oil return port;
and when the second reversing valve is in a fourth working position, the second oil inlet is communicated with the fourth oil outlet, and the third oil outlet is communicated with the second oil return port.
6. The walking control system of claim 1 or 2, further comprising a first walking motor and a second walking motor, the first walking motor being coupled to the first walking main valve, the second walking motor being coupled to the second walking main valve;
the switching of the working position of the first walking main valve linkage enables the first walking motor to rotate forwards or backwards, and the switching of the working position of the second walking main valve linkage enables the second walking motor to rotate forwards or backwards.
7. The walking control system of claim 1 or 2, wherein the first walking main valve train comprises a first main spool and a first compensation valve, the first main spool comprises a first pilot port set, and the first pilot port set is connected with the first pilot port set and is used for introducing the pilot oil;
an oil outlet of the first compensation valve is connected with an oil inlet of the first main valve element, and an oil inlet of the first compensation valve is used for connecting pressure oil.
8. The travel control system of claim 7, wherein the second travel main valve train includes a second main spool and a second makeup valve, the second main spool including a second pilot port set, the second pilot port set being connected to the second pilot port set for passing the pilot oil;
an oil outlet of the second compensation valve is connected with an oil inlet of the second main valve element, and an oil inlet of the second compensation valve is used for being connected with the pressure oil.
9. The travel control system of claim 8, wherein an oil outlet of the first compensation valve is in communication with an oil inlet of the second main spool;
and a throttle valve is arranged between an oil outlet of the first compensation valve and an oil inlet of the second main valve element.
10. A work machine, characterized by comprising a walking control system according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221071871.9U CN217401329U (en) | 2022-05-06 | 2022-05-06 | Travel control system and work machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221071871.9U CN217401329U (en) | 2022-05-06 | 2022-05-06 | Travel control system and work machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217401329U true CN217401329U (en) | 2022-09-09 |
Family
ID=83142675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221071871.9U Active CN217401329U (en) | 2022-05-06 | 2022-05-06 | Travel control system and work machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217401329U (en) |
-
2022
- 2022-05-06 CN CN202221071871.9U patent/CN217401329U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104632746A (en) | Switching valve, switching hydraulic system and crane | |
| EP3505688B1 (en) | System for controlling construction machinery and method for controlling construction machinery | |
| KR100248186B1 (en) | Hydraulic control system | |
| CN103950870A (en) | Forklift hydraulic system with energy recovery and double-pump oil supply functions | |
| AU721674B2 (en) | Mini-excavator with improved valve arrangement | |
| US11649611B2 (en) | Hydraulic system of construction machine | |
| CN102616705A (en) | Energy-saving forklift hydraulic system with energy recovery function | |
| CN217401329U (en) | Travel control system and work machine | |
| US3272280A (en) | Transmission and steering control mechanism for material handling vehicle | |
| CN114688115B (en) | Compound action control hydraulic system and method for loader | |
| CN203890013U (en) | Double-pump oil supply and energy recovery type forklift hydraulic system | |
| KR101474070B1 (en) | Hydraulic circuit of construction equipment | |
| CN113882456B (en) | Loader-digger that two-way traveles | |
| JP2002206256A (en) | Hydraulic device for backhoe | |
| JPH06301Y2 (en) | Hydraulic circuit for vehicle-based construction machinery | |
| CN113928981A (en) | Engineering vehicle and hydraulic driving system thereof | |
| CN112797042A (en) | Integrated main control valve, hydraulic system and crane | |
| JPH05126104A (en) | Hydraulic circuit for construction machine | |
| CN216767908U (en) | Hydraulic system and rotary drilling rig | |
| CN218493910U (en) | Hydraulic steering system, whole vehicle hydraulic control system and operation machine | |
| CN217401325U (en) | Hydraulic control system and working machine | |
| CN214884017U (en) | Excavator accessory operation logic switching system and excavator | |
| CN217759049U (en) | Pilot signal valve group, full-variable hydraulic system and loader | |
| CN109764014A (en) | A kind of support leg hydraulic system and engineering machinery | |
| CN214698545U (en) | Integrated main control valve, hydraulic system and crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |