CN109183891B - Excavator rotation unlocking control oil way and excavator - Google Patents
Excavator rotation unlocking control oil way and excavator Download PDFInfo
- Publication number
- CN109183891B CN109183891B CN201811060450.4A CN201811060450A CN109183891B CN 109183891 B CN109183891 B CN 109183891B CN 201811060450 A CN201811060450 A CN 201811060450A CN 109183891 B CN109183891 B CN 109183891B
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- unlocking
- valve
- excavator
- rotary motor
- oil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a hydraulic oil circuit of an excavator, and provides the hydraulic oil circuit of the excavator, aiming at solving the problem that a rotary motor can be abnormally unlocked when the conventional rotary unlocking control oil circuit of the excavator only has walking action for a long time, wherein inlets of check valves of a loading check valve group are correspondingly connected with pilot signal oil circuits of a loading action control main valve one by one, and outlets of the check valves are simultaneously connected with a first inlet of a shuttle valve and an unlocking control end of a rotary motor unlocking slide valve module after being communicated with each other; and the inlets of the check valves of the walking check valve group are connected with the pilot signal oil paths of the walking control main valve in a one-to-one correspondence manner, the outlets of the check valves are connected with the second inlet of the shuttle valve after being communicated with each other, and a throttle valve connected with an oil tank loop is arranged on an oil path between the unlocking control end of the rotary motor unlocking slide valve module and the outlet of the check valve of the upper one-way valve group. The invention can avoid abnormal unlocking of the rotary motor unlocking slide valve module caused by abnormal pressure building of the unlocking control end.
Description
Technical Field
The invention relates to a hydraulic oil circuit of an excavator, in particular to a rotation unlocking control oil circuit of the excavator and the excavator.
Background
The load sensitive hydraulic system is one of the more widely and mature hydraulic systems applied to the small excavator, but with the development and application of the system by domestic hydraulic part manufacturers, the domestic load sensitive system hydraulic parts are correspondingly used on the 10t to 20t medium excavator. As the mini-excavator and the medium-sized excavator adapt to different market groups and different working conditions, the unlocking control signal of the hydraulic rotary motor also corresponds to different acquisition requirements. The hydraulic rotary motor of the medium-sized excavator needs to be unlocked when the handle has action output, but the rotary motor is in a locking state when only the walking motor acts, namely the unlocking signal oil path of the rotary motor needs to be decompressed.
The prior excavator rotation unlocking control oil path is shown in figure 1, and comprises a rotation motor unlocking slide valve module 2 and an upper vehicle check valve group 5, the traveling check valve group 6 is composed of a plurality of check valves, inlets of the check valves are connected with pilot signal oil ways 4 of a main upper operation control valve in a one-to-one correspondence mode, unlocking signal output ports PB formed by mutually communicating outlets of the check valves of the check valve group 5 are simultaneously connected with a first inlet of the shuttle valve 8 and an unlocking control end SH of a rotary motor unlocking slide valve module through pipelines, the traveling check valve group 6 is composed of a plurality of check valves, inlets of the check valves are connected with the pilot signal oil ways of the main traveling control valve in a one-to-one correspondence mode, outlets of the check valves of the traveling check valve group 6 are mutually communicated and then connected with a second inlet of the shuttle valve 8, and outlets of the shuttle valve are connected with an idle speed releasing signal output port PA.
When the boarding does not act, the effective value of the pilot pressure signal of the boarding hand is zero, the pressures of the unlocking signal output port PB of the boarding check valve group 5 and the unlocking control end SH of the rotary motor unlocking slide valve module are also zero, the unlocking slide valve 21 in the rotary motor unlocking slide valve module 2 works at the lower position, and the rotary motor 1 is in a rotary self-locking state. When the boarding operation occurs, the boarding check valve group 5 transmits the maximum pressure signal in the boarding hand pilot pressure signal to the unlocking control end SH of the unlocking slide valve through the unlocking signal output port PB, so that the unlocking slide valve 21 in the rotary motor unlocking slide valve module 2 works at the upper position, the rotary motor 1 is in a rotary unlocking state, and the rotary operation is realized by operating the rotary pilot handle. The operation of the upper vehicle includes driving operations of hydraulic components such as a boom, an arm, a bucket, an attachment, and a swing motor.
When the excavator is in an oil inlet running state for a long time, the pressure signal output by the running check valve group 6 enables the small ball of the shuttle valve 8 to be sealed at the oil path side of the signal output port PB of the upper check valve group 5, the oil path between the unlocking signal output port PB of the upper check valve group 5 and the unlocking control end SH of the rotary motor unlocking slide valve module 2 is sealed, and due to the leakage of the valve core of the unlocking slide valve 21 in the rotary motor unlocking slide valve module, the pilot pressure oil introduced by the unlocking slide valve 21 from the pilot pressure oil source 3 leaks into the unlocking control end SH through the valve core of the unlocking slide valve 21, so that the pressure of the unlocking control end SH is gradually increased to enable the unlocking slide valve 21 to work at the lower position, the excavator is abnormally unlocked, and the safety accident possibly caused by the rotation of the upper body of the.
Disclosure of Invention
The invention aims to solve the technical problem that the rotary motor can be abnormally unlocked when the existing excavator is only walking for a long time, and provides the rotary unlocking control oil way for the excavator, so that the rotary motor can be prevented from being abnormally unlocked when the excavator is only walking for a long time, and the safety of a machine is improved.
The technical scheme for realizing the purpose of the invention is as follows: provides a rotation unlocking control oil way of an excavator, which comprises a rotation motor unlocking slide valve module, an upper one-way valve group, a walking one-way valve group and a shuttle valve, the upper one-way valve group is composed of a plurality of one-way valves, the inlets of the one-way valves are correspondingly connected with the pilot signal oil passages of the upper action control main valve, the unlocking signal output ports of the upper one-way valve group after the outlets of the one-way valves are mutually communicated are simultaneously connected with the first inlet of the shuttle valve and the unlocking control end of the rotary motor unlocking slide valve module through pipelines, the walking one-way valve group is composed of a plurality of one-way valves, inlets of the one-way valves are connected with pilot signal oil passages of the walking control main valve in a one-to-one correspondence mode, outlets of the one-way valves of the walking one-way valve group are connected with a second inlet of the shuttle valve after being communicated with each other, and an outlet of the shuttle valve is connected with an idle speed releasing signal output port; the rotary motor unlocking slide valve is characterized in that a throttle valve is connected to an oil path between an unlocking control end of the rotary motor unlocking slide valve module and an unlocking signal output port of the upper check valve group, and an outlet of the throttle valve is connected with an oil tank loop.
The technical scheme for realizing the purpose of the invention is as follows: the excavator comprises the excavator rotation unlocking control oil path, the idle speed unlocking signal output port is connected with an engine idle speed unlocking signal lead-in end of the excavator, and the unlocking pressure access port of the rotation motor unlocking slide valve module is connected with a pilot oil source.
Compared with the prior art, the throttle valve is arranged at the unlocking control end of the rotary motor unlocking slide valve module to release pressure, when the excavator only walks for a long time, hydraulic oil which leaks from the unlocking slide valve in the rotary motor unlocking slide valve module and enters the unlocking control end enters the oil tank loop through the throttle valve, and abnormal unlocking of the rotary motor unlocking slide valve module caused by abnormal pressure building at the unlocking control end is avoided.
Drawings
Fig. 1 is a schematic diagram of a rotation unlocking control oil way of a conventional excavator.
FIG. 2 is a schematic diagram of a rotation unlocking control oil way of the excavator.
Part names and serial numbers in the figure:
the hydraulic control system comprises a rotary motor 1, a rotary motor unlocking slide valve module 2, an unlocking slide valve 21, a pilot pressure oil source 3, a boarding action control main valve pilot signal oil path 4, a boarding check valve group 5, a walking check valve group 6, a walking control main valve pilot oil path 7, a shuttle valve 8, a throttle valve 9 and a hydraulic oil tank 10.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
As shown in fig. 2, the excavator rotation unlocking control oil path in this embodiment includes a rotation motor unlocking slide valve module 2, an upper check valve group 5, a traveling check valve group 6, and a shuttle valve 8, where the upper check valve group 5 is composed of a plurality of check valves, and an inlet of each check valve is connected to each pilot signal oil path 4 of an upper operation control main valve in a one-to-one correspondence manner, the upper operation control main valve includes a control main valve for controlling hydraulic actuators such as a boom cylinder, a bucket rod cylinder, a bucket cylinder, and a rotation motor, two hydraulic control ends of the control main valves are connected to one pilot oil path, the upper operation control main valve on the excavator mounted with an attachment further includes a control main valve for controlling the attachment, and the hydraulic control end of the control main valve is also connected to the pilot oil path. The number of the check valves in the boarding check valve group 5 is the same as the number of the pilot oil passages connected with the boarding action control main valve, the inlets of the check valves are correspondingly connected with the pilot oil passages connected with the boarding action control main valve one by one, the outlets of the check valves of the boarding check valve group 5 are mutually communicated to form an unlocking signal output port PB, and the largest pilot pressure signal collected by the boarding check valve group 5 from the pilot oil passages of the boarding action control main valve is output from the unlocking signal output port PB. The unlocking signal output port PB is simultaneously connected to the unlocking control port SH of the rotary motor unlocking slide valve module 2 and the first inlet of the shuttle valve 8 through a pipeline.
The walking check valve group 6 is composed of four check valves. The walking control main valve of the excavator comprises a left walking control main valve and a right walking control main valve, each control main valve is connected with two pilot oil ways, inlets of four one-way valves in the walking one-way valve group 6 are respectively connected with one pilot oil way, outlets of the four one-way valves are mutually communicated to form a walking pilot signal output port PT, the walking one-way valve group 6 collects pilot pressure signals of the walking control main valves and outputs the pilot pressure signals through the walking pilot signal output port PT, and the walking pilot signal output port PT is connected with a second inlet of the shuttle valve 8 through a pipeline. The outlet of the shuttle valve 8 forms an engine idle speed release signal output port PA.
A throttle valve 9 is arranged on an oil path between an unlocking signal output port PB of the upper check valve group 5 and an unlocking control end SH of the rotary motor unlocking slide valve module, an outlet of the throttle valve 9 is connected with a hydraulic oil tank 10 through an oil tank loop, and the other end of the throttle valve 9 is connected on the oil path between the unlocking signal output port PB and the unlocking control end SH.
The excavator rotation unlocking control oil path can be used on a hydraulic excavator, an engine idle speed releasing signal output port PA is connected with an engine idle speed releasing signal lead-in end, and an unlocking pressure access port PG of a rotation motor unlocking slide valve module 2 is connected with a pilot oil source 3.
When the boarding does not act, the effective value of the pilot pressure signal of the boarding hand is zero, the pressures of an unlocking signal output port PB of the boarding check valve group 5 and an unlocking control end SH of the rotary motor unlocking slide valve module are also zero, the unlocking slide valve 21 in the rotary motor unlocking slide valve module 2 works at the lower position, the rotary motor 1 is in a rotary self-locking state, when the boarding does act, the boarding check valve group 5 transmits the maximum pilot pressure signal in the pilot pressure signal of the boarding hand to the unlocking control end SH of the unlocking slide valve through the unlocking signal output port PB, so that the unlocking slide valve 21 in the rotary motor unlocking slide valve module 2 works at the upper position, the rotary motor 1 is in the rotary unlocking state, and rotary action is realized by operating a rotary pilot handle. The operation of the upper vehicle includes driving operations of hydraulic components such as a boom, an arm, a bucket, an attachment, and a swing motor.
When the excavator is in a walking state for a long time, a small ball of the shuttle valve 8 is closed by a pressure signal output by the walking check valve group 6 at the oil path side of a signal output port PB of the upper check valve group 5, an oil path between the unlocking signal output port PB of the upper check valve group 5 and an unlocking control end SH of the rotary motor unlocking slide valve module 2 is connected with a hydraulic oil tank 10 through a throttle valve 9, at the moment, hydraulic oil which leaks from a valve core of the unlocking slide valve 21 in the rotary motor unlocking slide valve module 2 and enters the unlocking control end SH enters the hydraulic oil tank 10 through the throttle valve 9, and therefore abnormal unlocking of the rotary motor 1 caused by abnormal pressure building of the unlocking control end SH of the rotary motor unlocking slide valve module 2 is avoided, and safety accidents caused by abnormal unlocking rotation of the rotary motor are avoided.
Claims (2)
1. A rotation unlocking control oil way of an excavator comprises a rotation motor unlocking slide valve module, an upper vehicle check valve group, a walking check valve group and a shuttle valve, the upper one-way valve group is composed of a plurality of one-way valves, the inlets of the one-way valves are correspondingly connected with the pilot signal oil passages of the upper action control main valve, the unlocking signal output ports of the upper one-way valve group after the outlets of the one-way valves are mutually communicated are simultaneously connected with the first inlet of the shuttle valve and the unlocking control end of the rotary motor unlocking slide valve module through pipelines, the walking one-way valve group is composed of a plurality of one-way valves, inlets of the one-way valves are connected with pilot signal oil passages of the walking control main valve in a one-to-one correspondence mode, outlets of the one-way valves of the walking one-way valve group are connected with a second inlet of the shuttle valve after being communicated with each other, and an outlet of the shuttle valve is connected with an idle speed releasing signal output port; the rotary motor unlocking slide valve is characterized in that a throttle valve is connected to an oil path between an unlocking control end of the rotary motor unlocking slide valve module and an unlocking signal output port of the upper check valve group, and an outlet of the throttle valve is connected with an oil tank loop.
2. An excavator, characterized by comprising the excavator rotation unlocking control oil path of claim 1, wherein the idle speed releasing signal output port is connected with an engine idle speed releasing signal lead-in end of the excavator, and the unlocking pressure inlet of the rotation motor unlocking slide valve module is connected with a pilot oil source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811060450.4A CN109183891B (en) | 2018-09-12 | 2018-09-12 | Excavator rotation unlocking control oil way and excavator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811060450.4A CN109183891B (en) | 2018-09-12 | 2018-09-12 | Excavator rotation unlocking control oil way and excavator |
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| CN109183891A CN109183891A (en) | 2019-01-11 |
| CN109183891B true CN109183891B (en) | 2021-05-14 |
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| CN201811060450.4A Active CN109183891B (en) | 2018-09-12 | 2018-09-12 | Excavator rotation unlocking control oil way and excavator |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111101553B (en) * | 2020-01-14 | 2022-02-15 | 徐州徐工矿业机械有限公司 | Electric control rotary brake release system of hydraulic excavator and use method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806498A (en) * | 2014-02-21 | 2014-05-21 | 柳州柳工液压件有限公司 | Excavator hydraulic system |
| CN205116264U (en) * | 2015-09-29 | 2016-03-30 | 陕西奥力信工程机械有限公司 | System is relieved in excavator gyration motor's braking |
| CN107208397A (en) * | 2014-12-24 | 2017-09-26 | 沃尔沃建筑设备公司 | The rotation control device and its control method of Architectural Equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9303386B2 (en) * | 2009-03-29 | 2016-04-05 | Stephen T. Schmidt | Tool attachments on an auto-powered mobile machine |
| JP5665652B2 (en) * | 2011-05-19 | 2015-02-04 | 日立建機株式会社 | Information management device for construction machinery |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103806498A (en) * | 2014-02-21 | 2014-05-21 | 柳州柳工液压件有限公司 | Excavator hydraulic system |
| CN107208397A (en) * | 2014-12-24 | 2017-09-26 | 沃尔沃建筑设备公司 | The rotation control device and its control method of Architectural Equipment |
| CN205116264U (en) * | 2015-09-29 | 2016-03-30 | 陕西奥力信工程机械有限公司 | System is relieved in excavator gyration motor's braking |
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| CN109183891A (en) | 2019-01-11 |
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