CN214373033U - Arm support assembly, health monitoring system thereof and engineering machinery - Google Patents
Arm support assembly, health monitoring system thereof and engineering machinery Download PDFInfo
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- CN214373033U CN214373033U CN202120219460.9U CN202120219460U CN214373033U CN 214373033 U CN214373033 U CN 214373033U CN 202120219460 U CN202120219460 U CN 202120219460U CN 214373033 U CN214373033 U CN 214373033U
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- arm support
- driving mechanism
- boom assembly
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Abstract
The utility model relates to an arm support field discloses an arm support subassembly and health monitoring system and engineering machine thereof, wherein, the arm support subassembly includes first arm festival (1), second arm festival (2) and rotary driving mechanism (3), rotary driving mechanism (3) include main part (31) and rotation portion (32), rotation portion (32) fixed connection in second arm festival (2), main part (31) through round pin axle (4) fixed connection in first arm festival (1), torque sensor and angle sensor in rotary driving mechanism (3), be provided with shear force sensor in round pin axle (4). According to the technical scheme, the torque sensor, the shearing force sensor and the angle sensor can judge the posture and stress condition of the arm support, judge the stress distribution of the arm support assembly in the using process and judge the health state of the arm support according to the information, so that reference can be provided for detection and maintenance of the arm support according to the health state.
Description
Technical Field
The utility model relates to an arm frame specifically relates to an arm frame subassembly to an engineering machine tool including this arm frame subassembly is related to.
Background
The arm support is a key bearing structure of the engineering machinery, and the safety and the reliability of the arm support play an important role in the safe operation of large-scale equipment. In the design process, the design life of the metal structure is determined according to the load spectrum coefficient and the working level in the specification, and the two are determined by the combination of actual loads. However, the actual load combination is difficult to predict, the actual load combination is often selected by experience during design, and the service life is usually deviated from the designed service life due to the difference between the actual service condition and the expected service condition, so that a great number of safety accidents occur in the actual service process. In addition, the use environment of the engineering mechanical equipment is complex and severe, the arm support collides in the use process, the structure of the arm support is damaged, and the potential safety hazard of the equipment in use is further aggravated. Therefore, it becomes important to monitor the health of the boom in real time, control the damage of the structure during the use of the boom, and determine whether the boom is in a safe use margin range.
The traditional method for monitoring the health of the arm support adopts strain gauges, piezoelectric/optical fiber sensors, acoustic emission sensors and the like, and in the methods, the sensors are in an exposed state and are easily damaged due to the influence of the external environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an arm frame subassembly to solve the health monitoring problem of arm frame subassembly.
In order to achieve the above object, an aspect of the present invention provides an arm support assembly, wherein, the arm support assembly includes first arm festival, second arm festival and rotary driving mechanism, rotary driving mechanism include the main part and can be driven for the main part is around the central axis pivoted rotation portion, rotation portion fixed connection in the second arm festival, the main part through round pin axle fixed connection in first arm festival, be provided with among the rotary driving mechanism and can measure the torque sensor that can measure output torque the rotation portion for the angle sensor of the change angle of main part, be provided with shear force sensor in the round pin axle.
Optionally, the shear force sensor is a fiber optic sensor.
Optionally, the pin extends in a direction parallel to the central axis.
Optionally, the main body is connected to an ear plate, and the ear plate is connected to the first arm section through the pin.
Optionally, the first arm section is provided with two side plates parallel to each other, and each side plate is clamped by the two ear plates and connected by the pin shaft.
Optionally, each side plate is connected to the ear plate through two pin shafts, and the pin shafts of the two side plates are aligned one by one along the length direction of the pin shaft.
Alternatively, the rotary drive mechanism is hydraulically driven.
Optionally, the rotary drive mechanism includes a hydraulic ram having a cylinder and a piston slidably engaged with the rotor, the piston being hydraulically drivable to move along the central axis to drive the rotor to rotate circumferentially.
The utility model discloses the second aspect provides a health monitoring system of jib subassembly, wherein, health monitoring system includes communication connection's signal monitoring module, signal acquisition transmission module and health status evaluation module, signal monitoring module includes above scheme torque sensor, shearing force sensor and angle sensor.
The utility model discloses the third aspect provides an engineering machine tool, wherein, engineering machine tool sets up above scheme the cantilever crane subassembly.
According to the technical scheme, the torque sensor, the shearing force sensor and the angle sensor can judge the posture and stress condition of the arm support, judge the stress distribution of the arm support assembly in the using process and judge the health state of the arm support according to the information, so that reference can be provided for detection and maintenance of the arm support according to the health state.
Drawings
Fig. 1 is a partial schematic structural view of an arm support assembly according to an embodiment of the present invention.
Description of the reference numerals
1 first arm segment 2 second arm segment
3 rotary driving mechanism 4 pin shaft
11 side plate
31 main body part 32 rotating part
33 ear plate
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
The utility model provides an arm frame assembly, wherein, arm frame assembly includes first arm festival 1, second arm festival 2 and rotary driving mechanism 3, rotary driving mechanism 3 include main part 31 and can be driven for main part 31 is around the central axis pivoted rotation portion 32, rotation portion 32 fixed connection in second arm festival 2, main part 31 through round pin axle 4 fixed connection in first arm festival 1, be provided with the torque sensor that can measure output torque among the rotary driving mechanism 3 and can measure rotation portion 32 for the angle sensor of the change angle of main part 31, be provided with shear force sensor in the round pin axle 4.
The boom assembly may include a plurality of boom segments, adjacent boom segments being relatively rotatable to effect attitude adjustment of the boom assembly.
Some of the arm sections are connected by a rotation driving mechanism 3, for example, the first arm section 1 and the second arm section 2, and of course, other arm sections may also be connected by the rotation driving mechanism 3. The rotation drive mechanism 3 includes a main body portion 31 and a rotating portion 32, and the rotating portion 32 can be driven to rotate about a central axis with respect to the main body portion 31, so that the second arm section 2 can be driven to rotate about the central axis with respect to the first arm section 1. In addition, a torque sensor is provided in the rotation drive mechanism 3 to measure the torque that it outputs, i.e., the torque transmitted to the second arm section 2 through the turning portion 32, and an angle sensor is also provided that can measure the change in the angle of the turning portion 32 with respect to the main body portion 31 to monitor the relative angle of the second arm section 2 with respect to the first arm section 1 to determine the attitude of the arm frame assembly. In this arm frame assembly, conventional connecting rods, cylinders, etc. are not used to drive the relative rotation of the two arm segments.
The body 31 is connected to the first arm section 1 by a pin 4, and when the rotating portion 32 is driven to rotate, the body 31 applies a reaction force to the first arm section 1, and the pin 4 can transmit the reaction force. Therefore, a shear force sensor can be arranged inside the pin shaft 4, so that the torque applied to the monitoring arm frame component can be further calculated,
the posture of the jib assembly can be judged through the torque sensor, the angle sensor and the shearing force sensor, the bending moment of the jib assembly is calculated, and further, the stress damage condition of the jib assembly can be monitored according to the change of the torque, and the service life of the jib assembly is judged.
According to the technical scheme, the torque sensor, the shearing force sensor and the angle sensor can judge the posture and stress condition of the arm support, judge the stress distribution of the arm support assembly in the using process and judge the health state of the arm support according to the information, so that reference can be provided for detection and maintenance of the arm support according to the health state.
Wherein the shear force sensor is an optical fiber sensor. The shear force sensor can be in various forms, such as strain gauge, magnetoelectric, optical fiber type and photoelectric type sensors, etc., and the present solution preferably adopts an optical fiber sensor, which can improve the measurement accuracy of the torque, and of course, in other embodiments, other types of shear force sensors as described above can also be adopted. An axial through hole can be formed in the pin shaft 4 to accommodate the shear force sensor, when the pin shaft 4 is subjected to shear force, the shear force sensor in the pin shaft 4 is also subjected to shear force, so that the corresponding shear force can be measured, and the torque effect on the arm support can be further calculated according to the shear force borne on the pin shaft 4.
Wherein the pin 4 extends in a direction parallel to the central axis. In such a structure, the reaction force received by the main body 31 can be more directly transmitted to the pin 4, so as to form a shearing action on the pin 4, thereby allowing the shear force sensor therein to more accurately measure the corresponding shear force.
In addition, the main body 31 is connected to an ear plate 33, and the ear plate 33 is connected to the first arm section 1 via the pin 4. As shown in fig. 1, an extended ear plate 33 is connected to the body portion 31, and a through hole is formed in the ear plate 33 to allow the pin 4 to pass therethrough, thereby connecting the ear plate 33, that is, the body portion 31 to the first arm section 1.
Further, the first arm section 1 is provided with two side plates 11 parallel to each other, and each side plate 11 is clamped by two ear plates 33 and connected by the pin shaft 4. As shown in fig. 1, the end surface of the first arm section 1 is provided with two side plates 11, and the two side plates 11 are parallel to each other, so that the pin shafts 4 respectively connected to the side plates 11 extend along the same direction, the directions of the shearing forces applied to the pin shafts 4 are basically consistent, and the accuracy of the shearing force measurement is improved. Each side plate 11 is clamped by two ear plates 33 to improve the stability of the connection between the side plate 11 and the ear plates 33.
Further, each side plate 11 is connected to the ear plate 33 through two pin shafts 4, and the pin shafts 4 of the two side plates 11 are aligned one by one along the length direction of the pin shafts 4. Referring to fig. 1, two pins 4 on one side plate 11 and two pins 4 on the other side plate 11 are aligned along the length direction of the pins 4 respectively, and the length direction of the pins 4 corresponds to the central axis of the rotary driving mechanism 3, which makes the shearing force of the aligned set of pins 4 substantially consistent, and the measured values of the shearing force sensors in the two pins 4 can be compared and corrected with each other, thereby improving the accuracy of the measurement.
In other embodiments, the first arm section 1 and the rotation driving mechanism 3 may be connected in other ways, for example, they form a hinge seat, and the two hinge seats are connected in a hinge manner (cannot rotate relatively) through the pin 4.
Wherein the rotary drive mechanism 3 is hydraulically driven. As described above, the rotation drive mechanism 3 outputs torque to the outside to drive the second arm section 2 to rotate relative to the first arm section 1, and the output torque itself is measurable, for example, based on parameters of the hydraulic drive portion, parameters of the rotating portion 32 and the main body portion 31, such as hydraulic pressure, hydraulic-oil-chamber sectional area, and the like. The moment of the jib assembly can be determined from the output torque of the rotary drive mechanism 3, and the damage of the jib assembly can be determined from the multiple torque outputs of the rotary drive mechanism 3 (each torque output will produce stress to damage the jib joint), and the service life of the jib assembly can be determined.
Wherein the rotary drive mechanism 3 comprises a hydraulic cylinder having a cylinder and a piston slidably engaged with the turning portion 32, the piston being hydraulically drivable to move along the central axis to drive the turning portion 32 to turn circumferentially. The hydraulic cylinder is a modification of a conventional cylinder and is accommodated in the rotary drive mechanism 3, for example, a cylinder body thereof may be integrated with the main body 31, and a piston may be slidably engaged with the rotating portion 32, and an angle between a joint surface of the piston and the rotating portion 32 is a non-right angle with respect to the axial direction, so that when the axially moving piston acts on the rotating portion 32, an axial acting force may form a component force in the circumferential direction, thereby driving the rotating portion 32 to rotate in the circumferential direction. The torque of the turning part 32 and thus the output torque of the rotary drive mechanism 3 can be calculated from the acting force of the piston on the turning part 32 and the radius of the acting position.
Additionally, the utility model provides a health monitoring system of jib subassembly, wherein, health monitoring system includes communication connection's signal monitoring module, signal acquisition transmission module and health status evaluation module, signal monitoring module includes above scheme torque sensor, shearing force sensor and angle sensor. The signal monitoring module can measure various parameters of the arm frame assembly, for example, the torque sensor can measure the torque output by the rotary driving mechanism, the rotary driving mechanism drives the rotation angle of the second arm section 2 relative to the first arm section 1, and the shearing action of the rotary driving mechanism 3 on the first arm section; the signal acquisition and transmission module can receive the signal from the signal monitoring module and transmit the signal to the health state evaluation module, for example, the signal acquisition and transmission module can receive the signal and transmit the signal in a wired transmission or wireless transmission mode; the health state evaluation module can comprise a calculation element, a storage element and the like, can process all parameters, can judge the posture and the stress condition of the jib assembly according to the parameters, can calculate the stress time history of all parts of the jib, and can calculate the stress spectrum of all parts so as to determine the damage condition of all parts and further judge the health state of the jib assembly; the health state evaluation module can perform finite element modeling on the arm support assembly, and the health state of the arm support assembly is calculated according to the simulated model.
Additionally, the utility model also provides an engineering machine tool, wherein, engineering machine tool is provided with above scheme the cantilever crane subassembly. The arm support assembly comprises a plurality of arm sections, and adjacent arm sections can be connected through a rotary driving mechanism 3 to realize relative rotation.
Further, the engineering machinery is a pump truck. The pump truck can be a concrete pump truck, the boom assembly of the pump truck can bear a concrete conveying pipe, and the direction of the boom assembly can be changed through the rotary driving mechanism 3 so as to convey concrete to a target position.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (10)
1. The utility model provides an arm frame subassembly, characterized in that, arm frame subassembly includes first arm festival (1), second arm festival (2) and rotary driving mechanism (3), rotary driving mechanism (3) include main part (31) and can be driven for main part (31) are around the central axis pivoted rotation portion (32), rotation portion (32) fixed connection in second arm festival (2), main part (31) through round pin axle (4) fixed connection in first arm festival (1), be provided with in rotary driving mechanism (3) can measure the torque sensor of output torque and can measure rotation portion (32) for the angle sensor of the change angle of main part (31), be provided with the shearing force sensor in round pin axle (4).
2. The boom assembly of claim 1, wherein the shear force sensor is a fiber optic sensor.
3. An arm support assembly according to claim 1, characterized in that the pin (4) extends in a direction parallel to the centre axis.
4. An arm rest assembly according to claim 1, characterised in that an ear plate (33) is connected to the main body portion (31), the ear plate (33) being connected to the first arm section (1) by the pin (4).
5. A boom assembly according to claim 4, characterized in that said first boom section (1) is provided with two side plates (11) parallel to each other, each of said side plates (11) being clamped by two of said ear plates (33) and connected by said pin (4).
6. A boom assembly according to claim 5, characterized in that each side plate (11) is connected to the ear plate (33) by two pins (4) and that the pins (4) of two side plates (11) are aligned one-to-one along the length of the pins (4).
7. Boom assembly according to claim 1, characterized in that the rotary drive mechanism (3) is hydraulically driven.
8. The boom assembly of claim 7, characterized in that the rotary drive mechanism (3) comprises a hydraulic ram having a cylinder and a piston slidably engaged with the turning portion (32), the piston being hydraulically drivable to move along the central axis to drive the turning portion (32) to turn circumferentially.
9. A health monitoring system for a boom assembly, said health monitoring system comprising a communicatively connected signal monitoring module, signal acquisition and transmission module, and health status assessment module, said signal monitoring module comprising said torque sensor, said shear force sensor, and said angle sensor of the boom assembly of any of claims 1-8.
10. A working machine, characterized in that the working machine is provided with a boom assembly according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120219460.9U CN214373033U (en) | 2021-01-26 | 2021-01-26 | Arm support assembly, health monitoring system thereof and engineering machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120219460.9U CN214373033U (en) | 2021-01-26 | 2021-01-26 | Arm support assembly, health monitoring system thereof and engineering machinery |
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| CN214373033U true CN214373033U (en) | 2021-10-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226566A1 (en) * | 2022-05-26 | 2023-11-30 | 中联重科股份有限公司 | Boom control method, control system, and construction machine |
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- 2021-01-26 CN CN202120219460.9U patent/CN214373033U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226566A1 (en) * | 2022-05-26 | 2023-11-30 | 中联重科股份有限公司 | Boom control method, control system, and construction machine |
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