CN210163037U

CN210163037U - Automatic landing leg leveling system

Info

Publication number: CN210163037U
Application number: CN201920806084.6U
Authority: CN
Inventors: 程明; 王茂伟; 张铂; 粱申申; 王红兵; 刘震; 赵鹤
Original assignee: SHANGHAI GELAMAN INTERNATIONAL FIRE FIGHTING EQUIPMENT CO Ltd
Current assignee: SHANGHAI GELAMAN INTERNATIONAL FIRE FIGHTING EQUIPMENT CO Ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-03-20
Anticipated expiration: 2029-05-30

Abstract

The utility model discloses a landing leg automatic leveling system, including horizontal landing leg and perpendicular landing leg, install the absolute displacement sensor who is used for acquireing perpendicular landing leg extension length and the relative displacement sensor who is used for acquireing the vertical height difference of the perpendicular landing leg relative benchmark perpendicular landing leg on every perpendicular landing leg respectively. The utility model discloses a relative displacement sensor can directly obtain the vertical height difference of the relative benchmark vertical leg of vertical leg, only needs to make each vertical leg stretch the vertical height difference who obtains for zero according to the vertical height difference who obtains, can accomplish the leveling, has leveling easy operation, swift, efficient and precision advantage such as high.

Description

Automatic landing leg leveling system

Technical Field

The utility model relates to a landing leg automatic leveling system belongs to landing leg leveling technical field.

Background

The equipment such as crane, high altitude construction car, the fire engine of lifting height is provided with the landing leg usually to be used for guaranteeing that it has sufficient security and stability in work, improve the anti factor of safety of overturning of whole car. The support legs are generally arranged on two sides of the bottom of the equipment chassis, the number of the support legs is generally four, and the support legs are divided into vertical support legs and horizontal support legs, the horizontal support legs are mainly used for reaching or changing the span of the support legs to adjust the operation range, and the vertical support legs are mainly used for leveling and bearing the whole load of the equipment. During operation, the supporting legs are extended, the vertical oil cylinders of the supporting legs lift the whole equipment, tires are separated from the ground, the whole equipment is completely supported by the supporting legs, and the chassis of the equipment is kept horizontal, so that the anti-overturning capacity of the equipment during operation can be improved. The step of adjusting the amount of telescoping of the legs to ensure that the equipment chassis is level is commonly referred to as leg leveling. And for the road condition on the flat ground, the landing leg is simple and convenient to level. However, for uneven road conditions, the leg leveling process is complicated, and the situation that the ground clearance of the tire is insufficient after the leg leveling often occurs, so that the tire needs to be leveled again, which wastes time and labor and affects the construction efficiency.

The existing leveling technology for the supporting leg mainly detects the angle through an inclination angle sensor to judge the inclination state of an equipment chassis and further realize the leveling of the supporting leg, has the defects of complex leveling process, long time consumption, low leveling precision and the like, and is mainly characterized in that:

firstly, before leveling, the support leg compaction detection and the tire liftoff detection are required, if any vertical support leg is compacted with the ground firstly in the extending process, the extension needs to be stopped firstly, the rest support legs are waited, after all tires lift off the ground, the support leg extension needs to be stopped, and then the leveling process is started.

Secondly, after the leveling is started, because angle signals in two directions sent by the inclination angle sensor are used as leveling basis, the stretching speed of each supporting leg needs to be continuously adjusted in the leveling process, even the phenomenon that the individual supporting leg is short to temporarily stretch or repeatedly level exists, the process is complex, the consumed time is long, and the defect is particularly obvious when the supporting legs are on supporting ground with large unevenness or more than four supporting legs. In the fire rescue site where the time is life, one second is more and one minute is more hope. Clearly, there is a great need to improve the efficiency of leg leveling.

Thirdly, the leveling precision is low, and due to the precision problem of the tilt angle sensor and the deviation of the installation plane, the deviation of different degrees exists in each leveling method after leveling.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem that prior art exists, the utility model aims at providing a landing leg automatic leveling system that leveling easy operation, leveling time are short and the leveling precision is high.

In order to achieve the above object, the utility model adopts the following technical scheme:

an automatic landing leg leveling system comprises a horizontal landing leg and a vertical landing leg, wherein an absolute displacement sensor for acquiring the extension length of the vertical landing leg and a relative displacement sensor for acquiring the vertical height difference of the vertical landing leg relative to a reference vertical landing leg are respectively arranged on each vertical landing leg.

According to a preferable scheme, the absolute displacement sensor comprises a detector and a trigger, the detector is installed on an oil cylinder barrel of each vertical supporting leg, and the trigger is installed at the maximum preset stroke position of each vertical supporting leg; the maximum preset stroke is the cylinder extension amount which ensures the leveling allowance of the cylinder when the tire is lifted off the ground and can ensure the maximum leveling angle range, namely: and the sum of the maximum preset stroke value and the oil cylinder leveling margin value is the maximum stroke value of the oil cylinder of the vertical supporting leg.

According to a preferable scheme, the relative displacement sensor is a laser displacement sensor.

In a preferred embodiment, the relative displacement sensors are mounted on the oil cylinder barrels of all the vertical legs.

Further preferably, the relative displacement sensors mounted on all of the vertical legs are located on the same plane.

Compared with the prior art, the utility model has the advantages of:

1) the leveling step is simple, the leveling speed is high, and the leveling efficiency is high;

because the utility model discloses install the absolute displacement sensor who is used for acquireing vertical leg extension length and the relative displacement sensor who is used for acquireing the vertical height difference of the relative benchmark vertical leg of vertical leg respectively on every vertical leg, can directly obtain the vertical height difference of the relative benchmark vertical leg of vertical leg through relative displacement sensor, only need make each vertical leg stretch the vertical height difference value that obtains according to the vertical height difference value that obtains and be zero, can accomplish the leveling, consequently, the utility model has the advantages of leveling easy operation, swift, efficient height.

2) The leveling precision is high;

because the utility model adopts the relative displacement sensor to detect the vertical height difference of each vertical supporting leg relative to the reference vertical supporting leg for leveling, the deviation of the chassis and the horizontal plane is directly reflected by the vertical height difference of each vertical supporting leg, so that the unevenness is reflected more directly and accurately; in addition, the accuracy of the relative displacement sensor (such as a laser displacement sensor) can reach a millimeter level, so that the leveling accuracy can be obviously improved. For example: use horizontal span of horizontal landing leg for 5500mm as an example, after the hypothesis adopted the angular transducer leveling, the leveling deviation is 0.2 (this precision has reached the limit in the reality), and this deviation reflection reaches 20mm through calculating about perpendicular landing leg ascending deviation in height direction, and adopts the utility model discloses during leveling system, the direction of height deviation of controlling two landing legs is within 1mm, and the precision has improved more than one magnitude, consequently, for prior art, the utility model discloses made the significance progress.

Drawings

Fig. 1 is a schematic view of a support leg distribution structure provided by an embodiment of the present invention;

FIG. 2 is a schematic structural view of the vertical leg in the embodiment;

fig. 3 is a schematic view of a work flow of an automatic landing leg leveling system according to an embodiment of the present invention.

The numbers in the figures are as follows: 1. a horizontal leg; 2. a vertical leg; 21. an oil cylinder barrel; 22. a maximum preset travel position; 3. an absolute displacement sensor; 31. a detector; 32. a trigger; 4. a relative displacement sensor.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Examples

Please refer to fig. 1 and fig. 2: the supporting leg automatic leveling system provided by the embodiment comprises a horizontal supporting leg 1 and a vertical supporting leg 2, wherein each vertical supporting leg 2 is respectively provided with an absolute displacement sensor 3 for acquiring the extension length of the vertical supporting leg and a relative displacement sensor 4 for acquiring the vertical height difference of the vertical supporting leg relative to a reference vertical supporting leg; the absolute displacement sensor 3 comprises a detector 31 and a trigger 32, wherein the detector 31 is arranged on the oil cylinder barrel 21 of each vertical supporting leg 2, and the trigger 32 is arranged at the maximum preset stroke position 22 of each vertical supporting leg 2. The relative displacement sensor 4 is a laser displacement sensor, and the relative displacement sensor 4 is arranged on the oil cylinder barrels 21 of all the vertical supporting legs 2; as the preferred scheme, the relative displacement sensors 4 installed on all the vertical supporting legs 2 are positioned on the same plane to ensure that the vertical height difference of each vertical supporting leg relative to the reference vertical supporting leg is directly obtained, so that the leveling stroke quantity is directly obtained, and the leveling operation is simple and rapid and has high precision.

Please refer to fig. 3:

landing leg automatic leveling system's working process, including following step:

s1) with all horizontal legs extended into position (i.e.: the oil cylinders of all the horizontal supporting legs extend to the maximum stroke position); whether the horizontal supporting leg extends to the position or not can be detected by adopting a horizontal displacement sensor, a proximity switch or a travel switch;

s2) extending all the vertical legs to a preset length L1; the preset length L1 is the cylinder extension of the vertical support leg which ensures the cylinder leveling margin L2 when the tire is lifted off the ground and can ensure the maximum leveling angle range, namely: the L1+ L2 value is the maximum stroke value of the oil cylinder of the vertical supporting leg;

s3) selecting the vertical leg with the highest vertical height direction as a reference vertical leg according to the relative displacement sensors, and then performing telescopic adjustment on the other vertical legs simultaneously according to the vertical height difference values of the relative reference vertical legs acquired by the respective relative displacement sensors until the vertical height difference values acquired by the respective relative displacement sensors are zero, thereby finishing leveling; the vertical height direction is vertical to the horizontal plane.

Because the utility model discloses install the absolute displacement sensor who is used for acquireing vertical leg extension length and the relative displacement sensor who is used for acquireing the vertical height difference of vertical leg relative benchmark vertical leg on every vertical leg respectively, can directly obtain the vertical height difference of vertical leg relative benchmark vertical leg through relative displacement sensor, only need to make each vertical leg extend the vertical height difference who obtains for zero according to the vertical height difference who obtains, can accomplish the leveling, consequently, the utility model has the advantages of leveling easy operation, swift, efficient height; in addition, because the utility model adopts the relative displacement sensor to detect the vertical height difference of each vertical supporting leg relative to the reference vertical supporting leg for leveling, the deviation of the chassis and the horizontal plane is directly reflected by the vertical height difference of each vertical supporting leg, so that the unevenness is reflected more directly and accurately; moreover, the precision of the relative displacement sensor (such as a laser displacement sensor) can reach the millimeter level, so the leveling precision can be obviously improved, and compared with the prior art, the utility model discloses the improvement that has made the significance.

It is finally necessary to point out here: the above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a landing leg automatic leveling system, includes horizontal landing leg and perpendicular landing leg, its characterized in that: an absolute displacement sensor for acquiring the extending length of the vertical support leg and a relative displacement sensor for acquiring the vertical height difference of the vertical support leg relative to the reference vertical support leg are respectively arranged on each vertical support leg.

2. The leg auto-leveling system of claim 1, wherein: the absolute displacement sensor comprises a detector and a trigger, the detector is mounted on the oil cylinder barrel of each vertical supporting leg, and the trigger is mounted at the maximum preset stroke position of each vertical supporting leg.

3. The leg auto-leveling system of claim 1, wherein: the relative displacement sensor is a laser displacement sensor.

4. The leg auto-leveling system according to claim 1 or 3, wherein: the relative displacement sensor is arranged on the oil cylinder barrel of all the vertical supporting legs.

5. The leg auto-leveling system of claim 4, wherein: the relative displacement sensors mounted on all the vertical legs are located on the same plane.