CN112302068A - Height limiting device and method and excavator - Google Patents
Height limiting device and method and excavator Download PDFInfo
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- CN112302068A CN112302068A CN202011216449.3A CN202011216449A CN112302068A CN 112302068 A CN112302068 A CN 112302068A CN 202011216449 A CN202011216449 A CN 202011216449A CN 112302068 A CN112302068 A CN 112302068A
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- height
- lifting
- controller
- limiting device
- main valve
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
- E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
Abstract
A height limiting device, a height limiting method and an excavator relate to the technical field of excavators. The height limiting device comprises a pilot handle, a main valve and a movable arm oil cylinder, wherein the pilot handle is respectively connected with the main valve through a lifting oil way and a descending oil way and controls the switching of the working position of the main valve; the lifting device comprises a pilot handle, a main valve, a proportional electromagnetic valve, a height detector and a controller, wherein the proportional electromagnetic valve is connected to a lifting oil path between the pilot handle and the main valve, the controller is electrically connected with the proportional electromagnetic valve and the height detector respectively, the height detector is used for detecting the lifting height of a movable arm and sending the lifting height to the controller, and the controller controls the on-off of the proportional electromagnetic valve according to a comparison result of the lifting height and a preset height. The height limiting device can effectively improve the height limiting precision of the movable arm.
Description
Technical Field
The invention relates to the technical field of excavators, in particular to a height limiting device and method and an excavator.
Background
The movable arm is an important component of a working device of the hydraulic excavator, and the hydraulic excavator controls the movable arm to swing and the excavator bucket to rotate through a hydraulic circuit so as to complete excavation. With the improvement of the functional requirements of people on the excavator, the excavator needs to be completed in a limited space.
The lifting height of the movable arm of the existing excavator is mainly controlled by visual inspection of an operator, and when the operator visually inspects that the movable arm reaches a preset height, the continuous lifting action of the movable arm is correspondingly stopped. However, the visual error makes it impossible to accurately control the lifting stroke of the boom, which is likely to cause inaccurate lifting and positioning of the boom of the excavator, and the boom is often higher or lower. In practical application scenarios, for example, when an excavator works near a high-speed rail, the two sides of the high-speed rail are often accompanied by electric wires, and when the excavator works near the high-speed rail, once the lifting height of a movable arm of the excavator is too high, the distance from the movable arm of the excavator to a live bus or a line is easily smaller than a safe distance, so that safety accidents such as personal injury, equipment trip, line shutdown and the like may occur.
Disclosure of Invention
The invention aims to provide a height limiting device, a height limiting method and an excavator, which can effectively improve the height limiting precision of a movable arm, thereby improving the operation safety of the excavator.
The embodiment of the invention is realized by the following steps:
in one aspect of the present invention, a height limiting device is provided, where the height limiting device includes a pilot handle, a main valve, and a boom cylinder, the pilot handle is connected to the main valve through a lift oil path and a drop oil path, respectively, and controls switching of a working position of the main valve, the main valve is connected to the boom cylinder, a piston rod of the boom cylinder is used for being connected to a boom of an excavator, and the main valve is used for supplying oil to a rodless cavity or a rod cavity of the boom cylinder, so that the boom cylinder drives the boom to lift or retract; the height limiting device further comprises a proportional solenoid valve, a height detector and a controller, wherein the proportional solenoid valve is connected to a lifting oil path between the pilot handle and the main valve, the controller is electrically connected with the proportional solenoid valve and the height detector respectively, the height detector is used for detecting the lifting height of the movable arm and sending the lifting height to the controller, and the controller controls the on-off of the proportional solenoid valve according to a comparison result of the lifting height and a preset height. The height limiting device can effectively improve the height limiting precision of the movable arm, so that the operation safety of the excavator is improved.
Optionally, the height detector is a travel switch, the controller is electrically connected to the proportional solenoid valve through the travel switch, and when the movable arm is lifted to a preset height, the movable arm acts on the travel switch to control the travel switch to be turned off.
Optionally, the height detector is a distance sensor.
Optionally, the proportional solenoid valve is a two-position three-way valve.
Optionally, the main valve is a three-position four-way valve, and the lifting oil path and the descending oil path are respectively communicated with a first working position and a third working position of the main valve.
Optionally, the height limiting device further comprises an alarm electrically connected with the controller, and the alarm is used for giving an alarm in response to a control signal of the controller under the condition that the lifting height is greater than or equal to the preset height.
Optionally, the alarm is an audible and visual alarm.
In another aspect of the present invention, there is provided a height defining method applied to the height defining apparatus described above, the method including: detecting the lifting height of a movable arm of the excavator through a height detector; judging whether the lifting height is greater than or equal to a preset height; and if so, controlling the proportional solenoid valve connected on the lifting oil path between the pilot handle and the main valve to be disconnected. The height limiting method can effectively improve the height limiting precision of the movable arm, so that the operation safety of the excavator is improved.
Optionally, the height detector employs any one of infrared ranging detection, ultrasonic ranging detection, laser ranging detection, or image ranging detection based on visual acquisition.
In another aspect of the present invention, an excavator is provided, which includes the height limiting device, and further includes an excavator body and a boom, wherein the boom is connected to the excavator body, and the height limiting device is used for limiting the lifting height of the boom relative to the excavator body. The excavator can effectively improve the height limiting precision of the movable arm, so that the operation safety of the excavator is improved.
The beneficial effects of the invention include:
the embodiment provides a height limiting device, which comprises a pilot handle, a main valve and a boom cylinder, wherein the pilot handle is respectively connected with the main valve through a lifting oil path and a descending oil path and controls the switching of the working position of the main valve; the height limiting device further comprises a proportional solenoid valve, a height detector and a controller, wherein the proportional solenoid valve is connected to a lifting oil path between the pilot handle and the main valve, the controller is electrically connected with the proportional solenoid valve and the height detector respectively, the height detector is used for detecting the lifting height of the movable arm and sending the lifting height to the controller, and the controller controls the on-off of the proportional solenoid valve according to the comparison result of the lifting height and the preset height. In the actual operation process, the lifting height of the movable arm can be detected through the height detector, and then the lifting height is fed back to the controller; the controller compares the lifting height with a preset height, and then controls the on-off of the proportional solenoid valve according to the comparison result, so that the movable arm is in a state that the movable arm can be continuously lifted or cannot be lifted. Thus, the height limiting device can effectively improve the height limiting precision of the boom, and improve the operation safety of the excavator.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a height-limiting device according to an embodiment of the present invention;
FIG. 2 is a second schematic structural diagram of a height-limiting device according to an embodiment of the present invention;
fig. 3 is a flowchart of a height limiting method according to an embodiment of the present invention.
Icon: 10-a pilot handle; 11-lifting the oil way; 12-descending oil circuit; 20-a main valve; 30-a boom cylinder; 31-rodless cavity; 32-a rod cavity; 40-proportional solenoid valve; 50-a height detector; 60-a controller; 70-alarm.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 and 2 in combination, the present embodiment provides a height limiting apparatus, which includes a pilot handle 10, a main valve 20, and a boom cylinder 30, wherein the pilot handle 10 is connected to the main valve 20 through a lift oil path 11 and a drop oil path 12, respectively, and controls switching of a working position of the main valve 20, the main valve 20 is connected to the boom cylinder 30, a piston rod of the boom cylinder 30 is used for being connected to a boom of an excavator, and the main valve 20 is used for supplying oil to a rodless chamber 31 or a rod chamber 32 of the boom cylinder 30, so that the boom cylinder 30 drives the boom to lift or retract; the height limiting device further comprises a proportional solenoid valve 40, a height detector 50 and a controller 60, wherein the proportional solenoid valve 40 is connected to the lifting oil path 11 between the pilot handle 10 and the main valve 20, the controller 60 is electrically connected with the proportional solenoid valve 40 and the height detector 50 respectively, the height detector 50 is used for detecting the lifting height of the boom and sending the lifting height to the controller 60, and the controller 60 controls the on-off of the proportional solenoid valve 40 according to the comparison result of the lifting height and the preset height. The height limiting device can effectively improve the height limiting precision of the movable arm, so that the operation safety of the excavator is improved.
The above-mentioned pilot handle 10 is a pilot handle 10 valve, and the basic operation principle thereof will be known to those skilled in the art, and will not be described in detail herein. The pilot handle 10 of the present embodiment controls the opening and closing of the lift oil path 11 or the lower oil path 12, respectively (i.e., the pilot handle 10 selectively communicates with the lift oil path 11 or the lower oil path 12), and further controls the switching of the operating position of the main valve 20 by the connection of the lift oil path 11 or the connection of the lower oil path 12.
For example, referring to fig. 1, in the present embodiment, the pilot handle 10 is communicated with the lift oil path 11, and then the spool of the main valve 20 is controlled to move, so that the working position of the main valve 20 is switched (from the initial middle position to the lower position), at this time, the hydraulic oil entering from the main valve 20 may be supplied to the rodless chamber 31 of the boom cylinder 30 through the oil inlet path between the main valve 20 and the boom cylinder 30, and then the piston rod of the boom cylinder 30 is extended. Since the piston rod of the boom cylinder 30 of the present embodiment is connected to the boom of the excavator, the boom can be pushed to perform the lifting operation; similarly, in the present embodiment, the pilot handle 10 may communicate with the descending oil path 12, and the valve body of the main valve 20 may be controlled to move, so that the operating position of the main valve 20 is switched (from the initial neutral position to the upper position), and the piston rod of the boom cylinder 30 may be driven to retract, thereby lowering the boom. It will be appreciated that during normal lifting, raising and retracting (i.e. lowering) of the boom can be carried out with reference to the above described working principle.
The proportional solenoid valve 40 is provided on the lift oil path 11 between the pilot handle 10 and the main valve 20, so that the boom lift operation can be controlled by controlling the on/off of the proportional solenoid valve 40. It should be understood that, in the present embodiment, the proportional solenoid valve 40 is in a normally open state, that is, the proportional solenoid valve 40 is always in a passage state under normal conditions.
In addition, the height detector 50 of the present embodiment is disposed on the moving path of the boom, so that when the boom is lifted or lowered, the height detector 50 can detect the change of the height thereof and feed back the detected change to the controller 60, and the controller 60 can control the on/off of the proportional solenoid valve 40 according to the movement of the boom.
For example, the height detector 50 may detect a lifting height of the boom, and then feed back the lifting height to the controller 60, and the controller 60 may compare the lifting height with a preset height, and then control the on/off of the proportional solenoid valve 40 according to a comparison result, so as to enable the boom to be in a state where the boom can be lifted continuously or cannot be lifted.
For example, the height detector 50 detects the lifting height of the boom, and sends the detected lifting height to the controller 60, the controller 60 compares the lifting height with a preset height, and when the lifting height is greater than or equal to the preset height (generally, when the lifting height is equal to the preset height, feedback can be obtained), the controller 60 controls the proportional solenoid valve 40 to be turned off, so that the lifting oil path 11 is turned off, and the boom cannot be lifted (the boom descending action is not affected), so that potential safety hazards caused by the excessively high lifting height of the boom can be avoided; on the contrary, when the lifting height is smaller than the preset height, the controller 60 does not need to operate, and the boom still can perform normal lifting or lowering operation.
It should be understood that the height detector 50 and the proportional solenoid valve 40 are electrically connected to the controller 60 for electrical control of the controller 60. Alternatively, the height detector 50 and the proportional solenoid valve 40 may be connected by wireless communication, respectively, to make the overall circuitry of the height limiting device more compact.
In addition, it should be noted that the preset height is a safety height, and a person skilled in the art can select a reasonable value according to actual conditions. It should be noted that the value is chosen to be the maximum height at which the boom can be raised within the working environment. For example, when the boom works near a high-speed rail, since the electric wire is attached to both sides of the high-speed rail, any suitable height smaller than the height of the electric wire should be selected as the preset height according to the installation height of the electric wire.
The present embodiment provides a height limiting apparatus, which includes a pilot handle 10, a main valve 20, and a boom cylinder 30, wherein the pilot handle 10 is connected to the main valve 20 through a lift oil path 11 and a drop oil path 12, respectively, and controls switching of a working position of the main valve 20, the main valve 20 is connected to the boom cylinder 30, a piston rod of the boom cylinder 30 is used for being connected to a boom of an excavator, and the main valve 20 is used for supplying oil to a rodless chamber 31 or a rod chamber 32 of the boom cylinder 30, so that the boom cylinder 30 drives the boom to lift or retract; the height limiting device further comprises a proportional solenoid valve 40, a height detector 50 and a controller 60, wherein the proportional solenoid valve 40 is connected to the lifting oil path 11 between the pilot handle 10 and the main valve 20, the controller 60 is electrically connected with the proportional solenoid valve 40 and the height detector 50 respectively, the height detector 50 is used for detecting the lifting height of the boom and sending the lifting height to the controller 60, and the controller 60 controls the on-off of the proportional solenoid valve 40 according to the comparison result of the lifting height and the preset height. During an actual operation, the elevation height of the boom may be detected by the height detector 50 and then fed back to the controller 60; the controller 60 compares the lifting height with a preset height, and controls the proportional solenoid valve 40 to be turned on or off according to the comparison result, so that the boom is in a state in which the boom can be continuously lifted or cannot be lifted. Thus, the height limiting device can effectively improve the height limiting precision of the boom, and improve the operation safety of the excavator.
In the present embodiment, the height detector 50 may alternatively be a distance sensor. For example, the height detector 50 may adopt any one of infrared distance measurement detection, ultrasonic distance measurement detection, laser distance measurement detection, or image distance measurement detection based on visual collection.
Of course, alternatively, the height detector 50 may also be a travel switch, and the controller 60 is electrically connected to the proportional solenoid valve 40 through the travel switch, and when the boom is lifted to a preset height, the boom acts on the travel switch to control the travel switch to be turned off. Accordingly, when the lifting height of the boom is equal to or greater than the preset height, the boom may touch the travel switch in the lifting process, so that the travel switch is turned off, and correspondingly, the turning-off of the travel switch may turn off the electrical signal, which is supplied to the proportional solenoid valve 40 by the controller 60 and keeps the proportional solenoid valve 40 in the closed state, so that the proportional solenoid valve 40 may be in the off state, and the boom may not be supplied with the oil from the lifting oil path 11, and may not continue to lift.
For example, referring to fig. 1, in the present embodiment, the proportional solenoid valve 40 is a two-position three-way valve.
Alternatively, the main valve 20 is a three-position four-way valve, and the lift oil path 11 and the lower oil path 12 are respectively communicated with the first operation position and the third operation position of the main valve 20. It should be noted that the first operating position is the upper position shown in fig. 1, the second operating position is the middle position, and the third operating position is the lower position. The lift oil passage 11 and the drop oil passage 12 are respectively communicated with a first operating position and a third operating position of the main valve 20, and may be used to push the spool of the main valve 20 to move to switch the operating positions.
In addition, in order to facilitate lifting workers to timely find the lifting height condition of the boom, particularly the condition when the boom is at a dangerous position (namely, the boom reaches or exceeds the preset height). Referring to fig. 2 again, optionally, the height limiting device further includes an alarm 70 electrically connected to the controller 60, and generates an alarm in response to a control signal of the controller 60 when the lifting height is greater than or equal to the preset height.
That is, under the condition that the lifting height of the boom is greater than or equal to the preset height, the controller 60 controls the alarm 70 according to the feedback of the height detector 50, and at this time, the alarm 70 gives an alarm in response to the control signal of the controller 60, so as to prompt the worker to pay attention to protection, so as to avoid abnormal lifting of the boom due to the failure of the proportional solenoid valve 40.
Optionally, the alarm 70 is any one of an audible and visual alarm 70, a voice announcer, and the like, which is convenient for the staff to find.
In another aspect of the present invention, a height limiting method is provided, which is applied to the height limiting device described above. Referring to fig. 3, the method includes:
s100, the height of the excavator is detected through the height detector 50.
And S100, judging whether the lifting height is greater than or equal to a preset height.
If so, the proportional solenoid valve 40 that controls the lift oil passage 11 connected between the pilot handle 10 and the main valve 20 is turned off.
Thus, during actual operation, the height defining method may detect the elevation height of the boom in advance by the height detector 50; then judging whether the lifting height is greater than or equal to a preset height; if so, the proportional solenoid valve 40 is controlled to be turned off, so that the lift oil path 11, which supplies the boom cylinder to lift the boom, is turned off, and thus the boom can be in a state where it cannot be lifted. Thus, the height limiting device can effectively improve the height limiting precision of the boom, and improve the operation safety of the excavator.
It should be noted that, if the lifting height is smaller than the preset height, no operation is required; alternatively, the operation may continue to return to S100, and the height detector 50 may detect the boom raising height of the excavator.
Alternatively, the height detector 50 may be a distance sensor or a travel switch. When the distance sensor is used, any one of infrared distance measurement detection, ultrasonic distance measurement detection, laser distance measurement detection or image distance measurement detection based on visual collection can be adopted.
In another aspect of the present invention, an excavator is provided, which includes the height limiting device, and further includes an excavator body and a boom, wherein the boom is connected to the excavator body, and the height limiting device is used for limiting the lifting height of the boom relative to the excavator body. The excavator can effectively improve the height limiting precision of the movable arm, so that the operation safety of the excavator is improved. Since the structure of the height limiting device and the advantages thereof have been described in detail in the foregoing, they are not described herein again.
The above description is only an alternative embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
Claims (10)
1. A height limiting device is characterized by comprising a pilot handle, a main valve and a movable arm oil cylinder, wherein the pilot handle is connected with the main valve through a lifting oil path and a descending oil path respectively and controls the switching of the working position of the main valve;
the height limiting device further comprises a proportional solenoid valve, a height detector and a controller, wherein the proportional solenoid valve is connected to a lifting oil path between the pilot handle and the main valve, the controller is electrically connected with the proportional solenoid valve and the height detector respectively, the height detector is used for detecting the lifting height of the movable arm and sending the lifting height to the controller, and the controller controls the on-off of the proportional solenoid valve according to a comparison result of the lifting height and a preset height.
2. The height limiting device of claim 1, wherein the height detector is a travel switch, the controller is electrically connected to the proportional solenoid valve through the travel switch, and the boom acts on the travel switch to control the travel switch to be turned off when the boom is lifted to a preset height.
3. A height defining apparatus as claimed in claim 1, wherein the height detector is a distance sensor.
4. The height limiting device of claim 1, wherein the proportional solenoid valve is a two-position, three-way valve.
5. The height limiting device of claim 1 wherein the main valve is a three-position, four-way valve, and wherein the lift oil passage and the drop oil passage communicate with the first operating position and the third operating position of the main valve, respectively.
6. The height-defining apparatus of claim 1, further comprising an alarm electrically connected to the controller, the alarm being configured to sound an alarm in response to a control signal from the controller if the lift height is greater than or equal to a predetermined height.
7. A height limiting device as claimed in claim 6 wherein the alarm is an audible and visual alarm.
8. A height definition method, applied to the height definition apparatus of any one of claims 1 to 7, the method comprising:
detecting the lifting height of a movable arm of the excavator through a height detector;
judging whether the lifting height is greater than or equal to a preset height;
and if so, controlling the proportional solenoid valve connected on the lifting oil path between the pilot handle and the main valve to be disconnected.
9. The height-defining method of claim 8, wherein said height detector employs any one of infrared range finding detection, ultrasonic range finding detection, laser range finding detection, or visual acquisition-based image range finding detection.
10. An excavator, comprising the height limiting device as claimed in any one of claims 1 to 7, further comprising an excavator body and a boom attached to the excavator body, wherein the height limiting device is used for limiting the lifting height of the boom relative to the excavator body.
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| CN202011216449.3A CN112302068B (en) | 2020-11-04 | 2020-11-04 | Height limiting device and excavator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809179A (en) * | 2022-06-06 | 2022-07-29 | 力士德工程机械股份有限公司 | Excavator movable arm limiting device and excavator with same |
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| CN102912816A (en) * | 2012-11-19 | 2013-02-06 | 中联重科股份有限公司渭南分公司 | Control method and control device for excavator and excavator |
| AU2017202395A1 (en) * | 2017-04-11 | 2018-10-25 | G Fleet Holdings Pty Ltd | Height Limiter |
| CN110306622A (en) * | 2019-06-18 | 2019-10-08 | 江苏徐工工程机械研究院有限公司 | A kind of working device of loader lift height autocontrol method, apparatus and system |
| CN110905036A (en) * | 2019-12-02 | 2020-03-24 | 三一重机有限公司 | Anti-collision method of excavator movable arm, anti-collision system of excavator movable arm and excavator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809179A (en) * | 2022-06-06 | 2022-07-29 | 力士德工程机械股份有限公司 | Excavator movable arm limiting device and excavator with same |
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