CN214309243U - Supporting leg counter-force measuring device - Google Patents
Supporting leg counter-force measuring device Download PDFInfo
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- CN214309243U CN214309243U CN202120458637.0U CN202120458637U CN214309243U CN 214309243 U CN214309243 U CN 214309243U CN 202120458637 U CN202120458637 U CN 202120458637U CN 214309243 U CN214309243 U CN 214309243U
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Abstract
The utility model provides a counter-force measuring device for supporting legs, wherein a first vertical measuring surface and a second vertical measuring surface are respectively arranged on the left and right parts of the middle part of a horizontal supporting leg; a measuring point A is arranged at the center of the bottom edge of the first vertical measuring surface, a measuring point C is arranged at the center of the right side edge of the first vertical measuring surface, a measuring point B is arranged at the center of the bottom edge of the second vertical measuring surface, and a measuring point D is arranged at the center of the right side edge of the second vertical measuring surface; the piston rod end of the vertical supporting leg oil cylinder is vertically connected to the lower end of one end of the horizontal supporting leg, which is far away from the engineering machinery operation main body; the measuring unit comprises a strain element A, a strain element B, a strain element C and a strain element D; strain original paper A, strain original paper B, strain original paper C and strain original paper D paste respectively and locate at measuring point A, measuring point B, measuring point C and measuring point D. The device can monitor the vertical and horizontal reaction force of the whole vehicle simultaneously, and is favorable for ensuring the operation safety of the leg type engineering machinery.
Description
Technical Field
The utility model belongs to the technical field of measure, specifically a landing leg counter-force measuring device.
Background
When the leg type engineering machinery works, the whole operation main body is supported by a plurality of legs, and the common leg type engineering machinery is provided with a wheel crane, a pump truck and the like. In order to prevent the engineering machinery from tipping and sliding horizontally, which affect the operation safety, during the operation, a counter force sensor of the support leg is usually used to monitor the counter force of the support leg.
The leg reaction force may be a vertical leg reaction force and a horizontal leg reaction force depending on the direction. The counter force of the supporting legs in the vertical direction influences the tilting performance of the whole vehicle along the vertical direction. The counter force of the support leg in the horizontal direction mainly influences the horizontal sliding of the whole vehicle and the reliability of the vertical oil cylinder under the action of the horizontal force. The existing supporting leg type engineering machinery has large design safety margin, and the influence of the supporting leg reaction force in the horizontal direction on the horizontal sliding of the whole vehicle and the reliability of an oil cylinder is small, so that the lateral force is not monitored temporarily, and only the vertical reaction force influencing the tipping is monitored in a key manner.
Along with the aggravation of market competition, the lightweight degree of products is higher and higher, and the safety margin of the structure is smaller and smaller. The influence of the horizontal sliding of the whole vehicle generated by the counter force of the supporting legs in the horizontal direction and the reliability of the vertical oil cylinder under the action of the horizontal force on the operation safety of the whole vehicle is more and more obvious, and the neglect treatment can not be carried out any more. In order to ensure the work safety of the leg type construction machine, it is necessary to monitor the vertical and horizontal reaction forces of the entire vehicle in real time.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model provides a landing leg counter-force measuring device, the device can monitor simultaneously the perpendicular of whole car and the counter-force of horizontal direction, can be convenient for study whole car horizontal slip and the reliability of perpendicular hydro-cylinder under the horizontal force effect that horizontal direction landing leg counter-force produced, are favorable to ensureing landing leg formula engineering machine's operation safety.
In order to achieve the above object, the utility model provides a supporting leg counter-force measuring device, which comprises an engineering machinery operation main body, a plurality of horizontal supporting legs horizontally and fixedly connected around the engineering machinery operation main body, a plurality of vertical supporting leg oil cylinders arranged corresponding to the plurality of horizontal supporting legs, a plurality of groups of measuring units arranged corresponding to the plurality of horizontal supporting legs, a data processor and a dynamic data acquisition instrument;
a first vertical measuring surface and a second vertical measuring surface are respectively arranged on the left part and the right part of the middle part of the horizontal supporting leg; a measuring point A is arranged at the center of the bottom edge of the first vertical measuring surface, a measuring point C is arranged at the center of the right edge of the first vertical measuring surface, a measuring point B is arranged at the center of the bottom edge of the second vertical measuring surface, and a measuring point D is arranged at the center of the right edge of the second vertical measuring surface;
the piston rod end of the vertical supporting leg oil cylinder is vertically connected to the lower end of one end of the horizontal supporting leg, which is far away from the engineering machinery operation main body;
the measuring unit comprises a strain element A, a strain element B, a strain element C and a strain element D; the strain element A, the strain element B, the strain element C and the strain element D are respectively stuck to a measuring point A, a measuring point B, a measuring point C and a measuring point D;
the data processor is respectively connected with the strain element A, the strain element B, the strain element C and the strain element D through the dynamic data acquisition instrument; the data processor is a PLC controller.
Preferably, the strain element a, the strain element B, the strain element C and the strain element D are all unidirectional strain gauges, and the arrangement directions are all horizontal directions.
The utility model discloses in, through the setting of strain original paper A, strain original paper B, strain original paper C and strain original paper D, the strain value of acquisition survey point department that can be convenient, and then the landing leg counter-force on the calculation landing leg counter-force in the vertical direction that can be swift and the horizontal direction. The device has simple structure and low manufacturing cost, can be convenient for realize monitoring the vertical and horizontal counter-forces of the whole vehicle simultaneously, can be convenient for researching the horizontal sliding of the whole vehicle generated by the counter-force of the supporting leg in the horizontal direction and the reliability of the vertical oil cylinder under the action of the horizontal force, and is favorable for ensuring the operation safety of the supporting leg type engineering machinery.
Drawings
FIG. 1 is a schematic structural diagram of a leg-type engineering machine;
FIG. 2 is a layout diagram of a leg reaction force measuring strain element on a horizontal leg;
FIG. 3 is a diagram of a strain element placement position and a force diagram;
fig. 4 is an elevational view of a layout of a strain element.
In the figure: 100. engineering machine tool operation main part, 110, horizontal leg, 120, perpendicular landing leg hydro-cylinder, 130, original paper A that meets an emergency, 140, original paper B that meets an emergency, 150, original paper C that meets an emergency, 160, original paper D that meets an emergency, 170, first vertical measuring surface, 180, the vertical measuring surface of second.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 to 4, a leg reaction force measuring device includes a work machine body 100, a plurality of horizontal legs 110 horizontally and fixedly connected to the periphery of the work machine body 100, a plurality of vertical leg cylinders 120 corresponding to the plurality of horizontal legs 110, and a plurality of sets of measuring units corresponding to the plurality of horizontal legs 110;
a first vertical measuring surface 170 and a second vertical measuring surface 180 are respectively arranged on the left and right parts of the middle part of the horizontal supporting leg 110; a measuring point A is arranged at the center of the bottom edge of the first vertical measuring surface 170, a measuring point C is arranged at the center of the right edge of the first vertical measuring surface 170, a measuring point B is arranged at the center of the bottom edge of the second vertical measuring surface 180, and a measuring point D is arranged at the center of the right edge of the second vertical measuring surface 180;
the piston rod end of the vertical supporting leg oil cylinder 120 is vertically connected to the lower end of one end of the horizontal supporting leg 110 far away from the engineering machinery operation main body 100;
the measuring unit comprises a strain element A130, a strain element B140, a strain element C150 and a strain element D160; the strain element a130, the strain element B140, the strain element C150 and the strain element D160 are respectively adhered to the measuring point a, the measuring point B, the measuring point C and the measuring point D.
Preferably, the strain element a130, the strain element B140, the strain element C150 and the strain element D160 are all unidirectional strain foils, and the arrangement directions are all horizontal directions.
Preferably, the strain gauge further comprises a data processor and a dynamic data collector, wherein the data processor is connected with the strain element a130, the strain element B140, the strain element C150 and the strain element D160 through the dynamic data collector.
Through the setting of original paper A that meets an emergency, original paper B that meets an emergency, original paper C that meets an emergency and the setting of the original paper D that meets an emergency of acquisition locating point that can be convenient, and then the landing leg counter-force on the calculation vertical direction that can be swift and the landing leg counter-force on the horizontal direction. The device has simple structure and low manufacturing cost, can be convenient for realize monitoring the vertical and horizontal counter-forces of the whole vehicle simultaneously, can be convenient for researching the horizontal sliding of the whole vehicle generated by the counter-force of the supporting leg in the horizontal direction and the reliability of the vertical oil cylinder under the action of the horizontal force, and is favorable for ensuring the operation safety of the supporting leg type engineering machinery.
The utility model provides a landing leg counter-force measurement method's measurement process as follows:
s1: under the non-operation working condition of the engineering machinery operation main body 100, the vertical support leg oil cylinder 120 is in a retracted state, and the return-to-zero processing is carried out on the strain element A130, the strain element B140, the strain element C150 and the strain element D160;
s2: under the working condition of the engineering machinery working main body 100, real-time acquisition is carried out through a dynamic data acquisition instrumentCollecting strain original A, strain original B, strain original C and strain original D to acquire y-direction strain value epsilon at measuring point in real timeay、εby、εcyAnd εdy；
S3: calculating the counterforce Fz of the landing leg in the vertical direction and the counterforce Fy and Fx of the landing leg in the horizontal direction in real time respectively by using a data processor;
s31, the calculation process of the vertical leg counterforce Fz is as follows:
calculating y-direction stress sigma at the measuring point A according to the formula (1)ay：
In the formula: h isazThe z-direction distance from a measuring point A in the first vertical measuring surface 170 to the centroid of the section;
Iaxmoment of inertia about the x-axis in the first vertical measurement plane 170 through the centroid;
Lathe y-direction distance from the first vertical measuring surface 170 to the supporting point of the oil cylinder;
σFyais FyGenerating Y-direction stress on the measuring point A;
calculating y-direction stress sigma of the measuring point B according to the formula (2)by：
Obtaining formula (3) and formula (4) from the stress-strain formula:
σay＝Eεay (3)；
σby＝Eεby (4)
in the formula: h isbzThe Z-direction distance from a measuring point B in the second vertical measuring surface 180 to the centroid of the section;
Ibxthe moment of inertia in the second vertical measurement plane 180 about the X-axis through the centroid;
Labis the first vertical measuring plane 170 and the secondThe Y-direction distance of the two vertical measuring surfaces 180;
σFybis FyY-direction stress generated on the measuring point B;
at the part far from the loading point and the constraint part of the root of the landing leg, the counterforce F of the landing leg is obtained according to the Saint-Vietnam principleyThe y-direction tensile stress on the lower surface of the movable leg is basically the same, namely:
σFya＝σFyb (5)
solving the equations (1) - (5) to obtain a vertical-direction supporting leg reaction force Fz calculation equation (6);
s32, the calculation process of the horizontal leg counterforce Fy is as follows:
equation (7) is derived from equations (1), (3) and (6):
the y-direction tensile stress sigma of the measuring point A is obtained by using the formula (8)FyaCounter-force F to supporting legyThe relationship of (D) gives Fy：
In the formula, AaThe cross-sectional area of the lower bottom surface of the support leg at the first vertical measuring surface 170 is shown, and alpha is a correction coefficient, and correction is performed according to a test calibration result or a finite element result.
S33, the calculation process of the horizontal leg counterforce Fx is as follows:
calculating y-direction stress sigma of the measuring point C according to the formula (9)cy：
In the formula: h iscxThe x-direction distance from a measuring point C in the first vertical measuring surface 170 to the centroid of the cross section;
Icymoment of inertia about the y-axis passing through the centroid in the first vertical measurement plane 170;
Lathe y-direction distance from the first vertical measuring surface 170 to the supporting point of the oil cylinder;
σFycis FyY-direction stress generated on the measuring point C;
calculating the y-direction stress of the measuring point B according to the formula (10) as follows:
in the formula: h isdxThe distance from a measuring point D in the second vertical measuring surface 180 to the centroid of the section is the x-direction distance;
Idythe moment of inertia in the second vertical measurement plane 180 about the y-axis through the centroid;
σFydis FyY-direction stress generated by the measuring point D;
equation (11) and equation (12) are derived from the stress-strain equation:
σcy＝Eεcy (11)；
σdy＝Eεdy (12)；
formula (13) is derived from the saint wien principle:
σFyc＝σFyd (13)；
solving from equations (9) to (13) yields equation (14):
preferably, the data processor is a PLC controller.
The working principle is as follows:
during the operation of the leg type engineering machinery, the movable leg generates stress under the action of leg counterforce Fz in the vertical direction and leg counterforce Fx and Fy in the horizontal direction. The utility model discloses a measure the strain of corresponding measurement station on the movable leg with the original paper that meets an emergency and come the backstepping and calculate the perpendicular landing leg counter-force Fz of landing leg counter-force and horizontal direction landing leg counter-force Fx and Fy.
The utility model discloses a strain original paper measures the strain of corresponding measurement station on the movable leg and comes the backstepping to calculate the perpendicular landing leg counter-force Fz of landing leg counter-force and horizontal direction landing leg counter-force Fx and Fy, can effectively measure the perpendicular and horizontal direction's of whole car counter-force in real time, can be convenient for realize the real-time reliable control to the counter-force.
Claims (2)
1. A supporting leg counter-force measuring device comprises an engineering machinery operation main body (100), and is characterized by further comprising a plurality of horizontal supporting legs (110) horizontally and fixedly connected to the periphery of the engineering machinery operation main body (100), a plurality of vertical supporting leg oil cylinders (120) arranged corresponding to the plurality of horizontal supporting legs (110), a plurality of groups of measuring units arranged corresponding to the plurality of horizontal supporting legs (110), a data processor and a dynamic data acquisition instrument;
a first vertical measuring surface (170) and a second vertical measuring surface (180) are respectively arranged on the left part and the right part of the middle part of the horizontal supporting leg (110); a measuring point A is arranged at the center of the bottom edge of the first vertical measuring surface (170), a measuring point C is arranged at the center of the right edge of the first vertical measuring surface (170), a measuring point B is arranged at the center of the bottom edge of the second vertical measuring surface (180), and a measuring point D is arranged at the center of the right edge of the second vertical measuring surface (180);
the piston rod end of the vertical supporting leg oil cylinder (120) is vertically connected to the lower end of one end, far away from the engineering machinery operation main body (100), of the horizontal supporting leg (110);
the measuring unit comprises a strain element A (130), a strain element B (140), a strain element C (150) and a strain element D (160); the strain element A (130), the strain element B (140), the strain element C (150) and the strain element D (160) are respectively pasted at a measuring point A, a measuring point B, a measuring point C and a measuring point D;
the data processor is respectively connected with the strain element A (130), the strain element B (140), the strain element C (150) and the strain element D (160) through a dynamic data acquisition instrument; the data processor is a PLC controller.
2. The leg counterforce measuring device of claim 1, wherein the strain element a (130), the strain element B (140), the strain element C (150) and the strain element D (160) are all unidirectional strain gauges, and the arrangement directions are all horizontal directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120458637.0U CN214309243U (en) | 2021-03-03 | 2021-03-03 | Supporting leg counter-force measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120458637.0U CN214309243U (en) | 2021-03-03 | 2021-03-03 | Supporting leg counter-force measuring device |
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| CN214309243U true CN214309243U (en) | 2021-09-28 |
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| CN202120458637.0U Active CN214309243U (en) | 2021-03-03 | 2021-03-03 | Supporting leg counter-force measuring device |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Fengxian Gerant Electric Vehicle Co.,Ltd. Assignor: XUZHOU University OF TECHNOLOGY Contract record no.: X2024980004892 Denomination of utility model: Support leg reaction force measurement device Granted publication date: 20210928 License type: Common License Record date: 20240425 Assignee: Fengxian Zhonglian Electric Vehicle Technology Co.,Ltd. Assignor: XUZHOU University OF TECHNOLOGY Contract record no.: X2024980004890 Denomination of utility model: Support leg reaction force measurement device Granted publication date: 20210928 License type: Common License Record date: 20240425 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: XUZHOU FENGZHAN MACHINERY Co.,Ltd. Assignor: XUZHOU University OF TECHNOLOGY Contract record no.: X2024980004965 Denomination of utility model: Support leg reaction force measurement device Granted publication date: 20210928 License type: Common License Record date: 20240428 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: XUZHOU HENGJU ELECTROMECHANICAL TECHNOLOGY Co.,Ltd. Assignor: XUZHOU University OF TECHNOLOGY Contract record no.: X2024980005175 Denomination of utility model: Support leg reaction force measurement device Granted publication date: 20210928 License type: Common License Record date: 20240430 Assignee: Fengxian Kaifeng Machinery Manufacturing Co.,Ltd. Assignor: XUZHOU University OF TECHNOLOGY Contract record no.: X2024980005170 Denomination of utility model: Support leg reaction force measurement device Granted publication date: 20210928 License type: Common License Record date: 20240430 |