CN115265902A - Calibration test bed of three-pin type suspension force measuring system of tractor - Google Patents
Calibration test bed of three-pin type suspension force measuring system of tractor Download PDFInfo
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- CN115265902A CN115265902A CN202210879404.7A CN202210879404A CN115265902A CN 115265902 A CN115265902 A CN 115265902A CN 202210879404 A CN202210879404 A CN 202210879404A CN 115265902 A CN115265902 A CN 115265902A
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- 239000000725 suspension Substances 0.000 title claims abstract description 168
- 238000012360 testing method Methods 0.000 title claims abstract description 59
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000012795 verification Methods 0.000 abstract description 10
- 238000011160 research Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 238000003306 harvesting Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000009313 farming Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical group C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003971 tillage Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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Abstract
The invention discloses a calibration test bed of a three-pin type suspension force measuring system of a tractor, which comprises a test bed frame, a loading mechanism and a control device, wherein the loading mechanism is arranged in the test bed frame, and the control device controls the loading mechanism and the test bed frame to work. When the force-measuring system is used, force-measuring element two-dimensional shaft pin sensors in the tractor three-pin type suspension force-measuring system are arranged at the hinged connection ends of the upper suspension pull rod, the left suspension pull rod, the right suspension pull rod and the auxiliary suspension frame, and a loading force is applied to the auxiliary suspension frame, so that verification and calibration of the overall resultant force and the component force measured by the tractor three-pin type suspension force-measuring system can be realized. The method can provide accurate verification and calibration for resolving the space force of the three-pin type suspension force measuring system of the tractor, can replace different suspension force measuring systems to carry out calibration operation, and is not limited by harvesting seasons and regions. The calibration test bed is convenient to operate, low in cost, high in precision and high in scientific research value.
Description
Technical Field
The invention belongs to the technical field of detection, measurement and control of agricultural intelligent equipment, and particularly relates to a calibration test bed of a three-pin type suspension force measuring system of a tractor.
Background
The tractor is the main power machine in the agricultural production process, and its technical development represents the development level of national agricultural mechanization to a great extent. With the national and agricultural machinery industry developing a series of measures and standards to standardize agricultural machinery detection, the detection of operating efficiency and state parameters of the tractor under different working conditions is more and more emphasized. When the tractor carries out operations such as plowing, harrowing, sowing and harvesting in the field, various matched agricultural implements are mainly hung and pulled through the three-point suspension device to complete the operations, however, one of main factors influencing the energy consumption of the tractor is plowing resistance, so that the real-time monitoring of the plowing resistance by installing the sensor and the device on the three-point suspension mechanism is very important, the effective force position adjustment control can be carried out, the plowing power is optimized, and the compaction risk of wheels to soil is reduced.
Related scholars at home and abroad carry out research on the aspects of a suspension force measuring system and a suspension force measuring device in the tillage process of a tractor, and the existing detection methods can be divided into a force sensor or strain gauge direct force measuring mode and an indirect force measuring mode adopting a suspension frame structure. However, during field studies and testing of suspended load cells and devices, there is a lack of calibration studies for the suspended load cells studied. At present, indexes of the suspension of the tractor body are tested based on national standards and standards of agricultural machinery industry, high-precision calibration research on a field suspension force measuring system researched by a scholars is lacked, and the test precision and the reliability of data of the suspension force measuring system in the field test acquisition process cannot be obtained.
Therefore, designing a high-precision calibration test bed of the tractor suspension force-measuring system is extremely important, and mainly solves the problems that field test and calibration verification of the suspension force-measuring system are difficult to realize due to the fact that the direction of the field unknown load is variable and single-factor test is difficult to realize; meanwhile, a calibration device for the suspension force measuring system is lacked at the present stage, calibration research and dynamic response analysis are lacked, and the calculation of the space force is lacked in complete and accurate verification, so that the detection precision of actual tests or field suspension traction force (farming resistance) is unknown, the reliability of obtained data or results is low, the precision and the reliability of field detection of the suspension force measuring system cannot be measured, and whether the suspension force measuring system is a real traction force value cannot be evaluated. The invention aims to design a calibration test bed of a three-pin type suspension force measuring system of a tractor, which realizes static loading, steady-state step-by-step loading and the like of suspension force and can provide accurate verification and calibration for the three-pin type suspension force measuring system and the calculation of space force. A three-point suspension space force calibration platform is designed according to a tractor suspension structure and a field cultivation state, and a development control system is used for carrying out load loading control on the calibration platform so as to carry out force loading and calibration on a tested tractor three-pin suspension force measurement system.
Disclosure of Invention
The invention aims to design a calibration test bed of a three-pin type suspension force measuring system of a tractor to realize calibration and verification of the three-pin type suspension force measuring system of the tractor.
The technical scheme is that the calibration test bed of the tractor three-pin type suspension force measuring system comprises a test bed frame 1, a loading mechanism 2 and a control device 3, wherein the loading mechanism 2 is arranged in the test bed frame 1, and the control device 3 controls the loading mechanism 2 and the test bed frame 1 to work.
The test bench 1 comprises a frame 101, a three-point suspension fixing frame 102, a suspension upper pull rod 103, a left suspension lower pull rod 104, a right suspension lower pull rod 104, a suspension lifting rod 105, a suspension auxiliary frame 106, a two-dimensional shaft pin sensor 107 and a shaft pin sensor fixing buckle 108;
the three-point suspension fixing frame 102 comprises a fixing seat 1021, a lower pull rod fixing shaft 1022, a suspension lifting frame assembly 1023, a bearing with a seat 1024, a lifting arm 1025, a lifting adjusting rod 1026, an adjusting rod fixing nut 1027, a lifting support shaft 1028, a support shaft bearing with a seat 1029 and an upper pull rod fixing seat 10210; a lower pull rod fixing shaft 1022 is installed at the lower part of the fixing seat 1021 for fixing the left and right suspension lower pull rods 104; the suspension lifting frame assembly 1023 is composed of a lifting frame rotating shaft and a swinging rod, the lifting frame rotating shaft is used for installing the suspension lifting frame assembly 1023 behind the top of the fixed seat 1021 through a bearing with a seat 1024 and used for realizing the lifting adjustment of the left and right suspension lower pull rod 104, the lifting arm 1025 is fixed on the lifting frame rotating shaft through a fixed key, the swinging rod of the suspension lifting assembly 1023 is connected with the lifting adjusting rod 1026 through a shaft pin and is fixed on the lifting support shaft 1028 through the lifting adjusting rod 1026 and an adjusting rod fixing nut 1027 to realize the rotating lifting of the suspension lifting frame assembly 1023, and the lifting support shaft 1028 is fixed to the rear side of the fixed seat 1021 through a support shaft bearing with a seat 1029; the upper pull rod fixing seat 10210 is fixed at the front edge of the top of the fixing seat 1021;
the three-point suspension fixing frame 102 is fixed on the table top of the frame 101; one end of the suspension upper pull rod 103 is hinged with the upper pull rod fixing seat 1029 through a shaft pin, and the other end is hinged with the upper end of the suspension auxiliary frame 106 through a two-dimensional shaft pin sensor 107; one end of the left and right suspension lower tie rod 104 is connected with a lower tie rod fixing shaft 1022, and the other end thereof is hinged with the left and right lower ends of the suspension auxiliary frame 106 through a two-dimensional axle pin sensor 107; one end of the suspension lifting rod 105 is hinged with the lifting arm 1026 through a shaft pin, and the other end of the suspension lifting rod is hinged with the middle part of the left and right suspension lower pull rods 104 through a shaft pin; the pin sensor securing clasp 108 is attached to the front face of the suspension sub-frame 106.
The loading mechanism 2 comprises a loading lever 201, a loading lever support 202, a loading damper assembly 203, a tension rod rotating arm 204, a tension rod support 205, a tension rod adjusting sleeve 206, a tension sensor 207, a joint sleeve rod 208 and an electric push rod 209; the electric push rod 209 is arranged on the base of the frame 101 and is connected with the long arm end of the loading lever 201 through a shaft pin; the loading lever support 202 is installed on the base of the frame 101, the loading lever 201 is connected to the loading lever support 202 through a shaft pin, and the short arm of the loading lever 201 is connected with the lower end of the loading damper assembly 203 through the shaft pin; the tension rod support 205 is installed on the table top of the frame 101, the tension rod rotating arm 204 is connected to the tension rod support 205 through a shaft pin, one end of the tension rod rotating arm 204 is connected with the upper end of the loading damper assembly 203 through the shaft pin, and the other end of the tension rod rotating arm is connected with the tension rod adjusting sleeve 206 through the shaft pin; the front end of the tension rod adjusting sleeve 206 is connected with a tension sensor 207, the front end of the tension sensor 207 is connected with a joint sleeve rod 208, and the joint sleeve rod 208 is connected with the axle pin sensor fixing buckle 108 through the two-dimensional axle pin sensor 107.
The control device 3 comprises a loading force display instrument 301, a loading button 302, an unloading button 303, a switch 304 and an emergency stop button 305; the lifting of the electric push rod 209 is controlled by a loading button 302 and an unloading button 303, so that the loading and unloading of the loading force of the calibration test bed are realized; the loading force display instrument 301 displays the value of the loading tension in real time through the tension sensor 207, the emergency stop button 305 is used for calibrating the dangerous condition stop of the whole system of the test bed, and the control device 3 is installed on the frame 101.
The rear end of the shaft pin sensor fixing buckle 108 is provided with a mounting hole, and the front end thereof is provided with a connecting hole.
The calibration test bed of the tractor three-pin type suspension force measuring system provided by the invention has the following advantages:
1. when the calibration test bed of the tractor three-pin type suspension force measuring system is used, the force measuring element two-dimensional shaft pin sensor 107 in the tractor three-pin type suspension force measuring system is arranged at the hinged connection ends of the suspension upper pull rod 103, the left suspension lower pull rod 104, the right suspension lower pull rod 104 and the suspension auxiliary frame 106, and a loading force is applied to the suspension auxiliary frame 106, so that verification and calibration of the overall resultant force and the component force measured by the tractor three-pin type suspension force measuring system can be realized.
2. The mounting and fixing positions and angles of the shaft pin sensor fixing buckles 108 on the front end face of the suspension auxiliary frame 106 can be adjusted according to the working posture and farming resistance of the tractor three-point suspension device in the field, so that the simulation of the working posture of the tractor three-point suspension device in the field is realized, and the testing angle position and the tensile force of a tested three-pin suspension force-measuring system on a calibration test bed can be adjusted.
3. The method can provide accurate verification and calibration for resolving the space force of the three-pin type suspension force measuring system of the tractor, can replace different suspension force measuring systems to carry out calibration operation, and is not limited by harvesting seasons and regions.
4. The calibration test bed of the three-pin type suspension force measuring system of the tractor provided by the invention is convenient to operate, has lower cost and higher precision, and has very high scientific research value.
Drawings
FIG. 1 is a block diagram of the working principle of a calibration test stand of a three-pin suspension force measuring system of a tractor;
FIG. 2 is a perspective view of the overall structure of a calibration test bed of a three-pin suspension dynamometer system for a tractor;
FIG. 3 is a schematic perspective view of a three-point suspension fixture frame;
FIG. 4 is a schematic top view of a three-point suspension fixture frame;
FIG. 5 is a schematic perspective view of the loading mechanism;
FIG. 6 is a cross-sectional schematic view of a load damper assembly;
FIG. 7 is a control schematic block diagram of the control apparatus;
fig. 8 is a front view schematically showing the control device.
The reference numbers illustrate:
1. the test bed comprises a test bed, 2. A loading mechanism, 3. A control device, 4. A coaming and 5. A caster;
101. the device comprises a frame, 102, a three-point suspension fixing frame, 103, a suspension upper pull rod, 104, a left suspension lower pull rod, 105, a suspension lifting rod, 106, a suspension auxiliary frame, 107, a two-dimensional shaft pin sensor, 108 and a shaft pin sensor fixing buckle;
1021. the lifting device comprises a fixed seat, 1022, a lower pull rod fixed shaft, 1023, a suspension lifting frame assembly, 1024, a bearing with a seat, 1025, a lifting arm, 1026, a lifting adjusting rod, 1027, an adjusting rod fixing nut, 1028, a lifting supporting shaft, 1029, a supporting shaft bearing with a seat and 10210, an upper pull rod fixed seat;
201. the device comprises a loading lever, 202, a loading lever support, 203, a loading damper assembly, 204, a tension rod rotating arm, 205, a tension rod support, 206, a tension rod adjusting sleeve, 207, a tension sensor, 208, a joint sleeve rod, 209 and an electric push rod;
2031. pull rod, 2032 small spring, 2033 big spring;
301. loading force display instrument, 302, loading button, 303, unloading button, 304, switch, 305, emergency stop button;
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Examples
The calibration test bed of the three-pin type suspension force measuring system of the tractor according to the embodiment is shown in figures 1 to 8.
As shown in fig. 2, the calibration test bed of the three-pin suspension force measuring system of the tractor according to the embodiment includes a test bed frame 1, a loading mechanism 2 and a control device 3, wherein the loading mechanism 2 is arranged in the test bed frame 1, and the control device 3 controls the loading mechanism 2 and the test bed frame 1 to work.
The test bench 1 comprises a frame 101, a three-point suspension fixing frame 102, a suspension upper pull rod 103, a left suspension lower pull rod 104, a right suspension lower pull rod 104, a suspension lifting rod 105, a suspension auxiliary frame 106, a two-dimensional shaft pin sensor 107 and a shaft pin sensor fixing buckle 108; a surrounding plate 4 (the surrounding plate 4 is not shown in the figure to show the loading mechanism 2) is arranged on the periphery of the frame 101, and a caster 5 is arranged at the bottom of the frame 101.
As shown in fig. 3 and 4, the three-point suspension fixing frame 102 includes a fixing base 1021, a lower rod fixing shaft 1022, a suspension crane assembly 1023, a pedestal bearing 1024, a lifting arm 1025, a lifting adjusting rod 1026, an adjusting rod fixing nut 1027, a lifting support shaft 1028, a support shaft pedestal bearing 1029 and an upper rod fixing base 10210; a lower pull rod fixing shaft 1022 is installed at the lower part of the fixing seat 1021 for fixing the left and right suspension lower pull rods 104; the suspension lifting frame assembly 1023 is composed of a lifting frame rotating shaft and a swinging rod, the lifting frame rotating shaft is used for installing the suspension lifting frame assembly 1023 behind the top of the fixed seat 1021 through a bearing with a seat 1024 and used for realizing the lifting adjustment of the left and right suspension lower pull rod 104, the lifting arm 1025 is fixed on the lifting frame rotating shaft through a fixed key, the swinging rod of the suspension lifting assembly 1023 is connected with the lifting adjusting rod 1026 through a shaft pin and is fixed on the lifting support shaft 1028 through the lifting adjusting rod 1026 and an adjusting rod fixing nut 1027 to realize the rotating lifting of the suspension lifting frame assembly 1023, and the lifting support shaft 1028 is fixed to the rear side of the fixed seat 1021 through a support shaft bearing with a seat 1029; the upper pull rod fixing seat 10210 is fixed at the front edge of the top of the fixing seat 1021;
the three-point suspension fixing frame 102 is fixed on the table top of the frame 101; one end of the suspension upper pull rod 103 is hinged with the upper pull rod fixing seat 1029 through a shaft pin, and the other end of the suspension upper pull rod is hinged with the upper end of the suspension auxiliary frame 106 through a two-dimensional shaft pin sensor 107; one end of the left and right suspension lower pull rods 104 is connected with a lower pull rod fixing shaft 1022, and the other end thereof is hinged with the left and right lower ends of the suspension auxiliary frame 106 through a two-dimensional shaft pin sensor 107; one end of the suspension lifting rod 105 is hinged with the lifting arm 1026 through a shaft pin, and the other end is hinged with the middle part of the left and right suspension lower pull rods 104 through a shaft pin; the pin sensor fixing buckle 108 is connected to the front end surface of the suspension sub-frame 106.
The shaft pin sensor fixing buckle 108 is provided with a plurality of mounting holes and connecting holes at different positions, and the mounting holes enable the shaft pin sensor fixing buckle 108 to be mounted at different positions and angles on the front end face of the auxiliary suspension frame 106, so that the simulation of the working posture of the three-point suspension device of the tractor in the field is realized. The connecting hole is used for installing a joint sleeve rod 208 at the front end of the tension sensor 207, and the joint sleeve rod 208 is connected with the connecting hole on the pin sensor fixing buckle 108 through the two-dimensional pin sensor 107. As shown in fig. 2, the fixing buckle 108 of the shaft pin sensor in this embodiment has a mounting hole at the rear end and 5 connecting holes at the front end.
As shown in fig. 5 and 6, the loading mechanism 2 includes a loading lever 201, a loading lever support 202, a loading damper assembly 203, a tension rod rotating arm 204, a tension rod support 205, a tension rod adjusting sleeve 206, a tension sensor 207, a joint sleeve 208 and an electric push rod 209; the electric push rod 209 is arranged on the base of the frame 101 and is connected with the long arm end of the loading lever 201 through a shaft pin; the loading lever support 202 is installed on the base of the frame 101, the loading lever 201 is connected to the loading lever support 202 through a shaft pin, and the short arm of the loading lever 201 is connected with the lower end of the loading damper assembly 203 through the shaft pin; a tension rod support 205 is installed on the table top of the frame 101, a tension rod rotating arm 204 is connected to the tension rod support 205 through a shaft pin, one end of the tension rod rotating arm 204 is connected with the upper end of the loading damper assembly 203 through the shaft pin, and the other end of the tension rod rotating arm is connected with a tension rod adjusting sleeve 206 through the shaft pin; the front end of the tension rod adjusting sleeve 206 is connected with a tension sensor 207, the front end of the tension sensor 207 is connected with a joint sleeve rod 208, and the joint sleeve rod 208 is connected with a connecting hole on the shaft pin sensor fixing buckle 108 through the two-dimensional shaft pin sensor 107.
The loading damper assembly 203 mainly includes a pull rod 2031, a small spring 2032, and a large spring 2033; and the damping adjustment is realized by adjusting the magnitude of the spring force.
The loading of force is realized by controlling an electric push rod 209, the electric push rod 209 is connected with a long arm of a loading lever 201, a short arm of the loading lever 201 is connected with a lower end of a loading damper assembly 203, the upper end of the loading damper assembly 203 is connected with one end of a tension rod rotating arm 204, the other end of the tension rod rotating arm 204 is connected with the rear end of a tension rod adjusting sleeve 206, the front end of the tension rod adjusting sleeve 206 is connected with a tension sensor 207, the length of the tension rod adjusting sleeve 206 is adjustable through threads, the other end of the tension sensor 207 is connected with a joint sleeve 208, the joint sleeve 208 can be installed on installation holes in different positions on a shaft pin sensor fixing buckle 108 and used for adjusting the acting position and the posture direction of the loading force, and the connection adjustment when a three-point suspension mechanism is lifted is realized.
As shown in fig. 5 and 6, the control device 3 includes a loading force display 301, a loading button 302, an unloading button 303, a switch 304, and an emergency stop button 305; the lifting of the electric push rod 209 is controlled by a loading button 302 and an unloading button 303, so that the loading and unloading of the loading force of the calibration test bed are realized; the loading force display instrument 301 displays the value of the loading tension in real time through the tension sensor 207, the emergency stop button 305 is used for calibrating the dangerous condition stop of the whole system of the test bed, and the control device 3 is installed on the frame 101.
The working principle of the calibration test bed of the three-pin type suspension force measuring system of the tractor in the embodiment is shown in fig. 1. When calibrating or verifying the three-pin suspension force measuring system of the tractor, firstly, a force measuring element two-dimensional shaft pin sensor 107 in the three-pin suspension force measuring system of the tractor is arranged at the hinged connection ends of the suspension upper pull rod 103, the left suspension lower pull rod 104 and the right suspension lower pull rod 104 and the suspension auxiliary frame 106, and at the other side of the suspension auxiliary frame 106, a shaft pin sensor fixing buckle 108 is connected with a joint sleeve rod 208 of the loading mechanism 2 through the two-dimensional shaft pin sensor 107. Then, the control device 3 controls the loading mechanism 2 to apply a pulling force to the suspension sub-frame 106, and the suspension sub-frame 106 transmits the pulling force to the three-pin suspension mechanism through the two-dimensional pin sensor 107. The numerical value of the two-dimensional shaft pin sensor 107 is read, the calculated value of the tension force applied to the three-pin suspension force measuring system of the tractor is obtained through calculation of the three-pin suspension force measuring system of the tractor, the calculated value of the tension force is compared with the tension force applied to the suspension auxiliary frame 106 by the loading mechanism 2, and verification and calibration of the overall resultant force and the component force measured by the three-pin suspension force measuring system of the tractor can be realized according to the comparison result.
According to the calibration test bed of the three-pin type suspension force measuring system of the tractor, the installation fixing position and the angle of the fixing buckle 108 of the shaft pin sensor on the front end face of the suspension auxiliary frame 106 can be adjusted according to the working posture and the farming resistance of the three-pin type suspension force measuring system of the tractor in the field, so that the simulation of the working posture of the three-pin type suspension force measuring system of the tractor in the field is realized, and the testing angle position and the pulling force of the tested three-pin type suspension force measuring system on the calibration test bed can be adjusted.
The calibration test bed of the tractor three-pin type suspension force measuring system can provide accurate verification and calibration for the calculation of the space force of the tractor three-pin type suspension force measuring system, can replace different suspension force measuring systems to perform calibration operation, and is not limited by harvesting seasons and regions.
The calibration test bed of the tractor three-pin type suspension force measuring system provided by the invention is convenient to operate, low in cost, high in precision and high in scientific research value.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a calibration test bench of three round pin formula suspension dynamometry systems of tractor which characterized in that: the test bench comprises a test bench (1), a loading mechanism (2) and a control device (3), wherein the loading mechanism (2) is arranged in the test bench (1), and the control device (3) controls the loading mechanism (2) and the test bench (1) to work.
2. The calibration test bed of the tractor three-pin suspension force measuring system according to claim 1, characterized in that: the test bench (1) comprises a frame (101), a three-point suspension fixing frame (102), a suspension upper pull rod (103), a left suspension lower pull rod (104), a right suspension lower pull rod (104), a suspension lifting rod (105), a suspension auxiliary frame (106), a two-dimensional shaft pin sensor (107) and a shaft pin sensor fixing buckle (108);
the three-point suspension fixing frame (102) comprises a fixing seat (1021), a lower pull rod fixing shaft (1022), a suspension lifting frame assembly (1023), a bearing with a seat (1024), a lifting arm (1025), a lifting adjusting rod (1026), an adjusting rod fixing nut (1027), a lifting support shaft (1028), a support shaft bearing with a seat (1029) and an upper pull rod fixing seat (10210); the lower pull rod fixing shaft (1022) is arranged at the lower part of the fixing seat (1021) and is used for fixing the left and right suspension lower pull rods (104); the suspension lifting frame assembly (1023) is composed of a lifting frame rotating shaft and a swinging rod, the lifting frame rotating shaft is used for installing the suspension lifting frame assembly (1023) behind the top of the fixed seat (1021) through a bearing with a seat (1024) and used for realizing lifting adjustment of the left and right suspension lower pull rods (104), a lifting arm (1025) is fixed on the lifting frame rotating shaft through a fixed key, the swinging rod of the suspension lifting assembly (1023) is connected with a lifting adjusting rod (1026) through a shaft pin and is fixed on a lifting support shaft (1028) through a lifting adjusting rod (1026) and an adjusting rod fixing nut (1027) so as to realize rotating lifting of the suspension lifting frame assembly (1023), and the lifting support shaft (1028) is fixed to the rear side of the fixed seat (1021) through a support shaft bearing with a seat (1029); the upper pull rod fixing seat (10210) is fixed at the front edge of the top of the fixing seat (1021);
the three-point suspension fixing frame (102) is fixed on the table top of the frame (101); one end of the suspension upper pull rod (103) is hinged with the upper pull rod fixing seat (1029) through a shaft pin, and the other end of the suspension upper pull rod is hinged with the upper end of the suspension auxiliary frame (106) through a two-dimensional shaft pin sensor (107); one end of the left and right suspension lower pull rods (104) is connected with a lower pull rod fixing shaft (1022), and the other end of the left and right suspension lower pull rods is hinged with the left and right lower ends of the suspension auxiliary frame (106) through a two-dimensional shaft pin sensor (107); one end of the suspension lifting rod (105) is hinged with the lifting arm (1026) through a shaft pin, and the other end of the suspension lifting rod is hinged with the middle part of the left suspension lower pull rod (104) and the right suspension lower pull rod (104) through a shaft pin; the pin sensor fixing buckle (108) is connected with the front end face of the suspension auxiliary frame (106).
3. The calibration test bed of the tractor three-pin type suspension force measuring system according to claim 1, characterized in that: the loading mechanism (2) comprises a loading lever (201), a loading lever support (202), a loading damper assembly (203), a tension rod rotating arm (204), a tension rod support (205), a tension rod adjusting sleeve (206), a tension sensor (207), a joint sleeve rod (208) and an electric push rod (209); the electric push rod (209) is arranged on a base of the frame (101) and is connected with the long arm end of the loading lever (201) through a shaft pin; the loading lever support (202) is installed on a base of the frame (101), the loading lever (201) is connected to the loading lever support (202) through a shaft pin, and a short arm of the loading lever (201) is connected with the lower end of the loading damper assembly (203) through the shaft pin; the tension rod support (205) is installed on the table top of the frame (101), the tension rod rotating arm (204) is connected to the tension rod support (205) through a shaft pin, one end of the tension rod rotating arm (204) is connected with the upper end of the loading damper assembly (203) through the shaft pin, and the other end of the tension rod rotating arm is connected with the tension rod adjusting sleeve (206) through the shaft pin; the front end of the tension rod adjusting sleeve (206) is connected with a tension sensor (207), the front end of the tension sensor (207) is connected with a joint sleeve rod (208), and the joint sleeve rod (208) is connected with a shaft pin sensor fixing buckle (108) through a two-dimensional shaft pin sensor (107).
4. The calibration test bed of the tractor three-pin suspension force measuring system according to claim 1, characterized in that: the control device (3) comprises a loading force display instrument (301), a loading button (302), an unloading button (303), a switch (304) and an emergency stop button (305); the lifting of the electric push rod (209) is controlled by a loading button (302) and an unloading button (303), so that the loading and unloading of the loading force of the calibration test bed are realized; the loading force display instrument (301) displays the value of loading tension in real time through the tension sensor (207), the emergency stop button (305) is used for calibrating the dangerous condition stop of the whole system of the test bed, and the control device (3) is installed on the frame (101).
5. The calibration test bed of the tractor three-pin suspension force measuring system according to claim 1, characterized in that: the rear end of the shaft pin sensor fixing buckle (108) is provided with a mounting hole, and the front end of the shaft pin sensor fixing buckle is provided with a connecting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210879404.7A CN115265902B (en) | 2022-07-25 | 2022-07-25 | Calibration test bed of three-pin type suspension force measurement system of tractor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210879404.7A CN115265902B (en) | 2022-07-25 | 2022-07-25 | Calibration test bed of three-pin type suspension force measurement system of tractor |
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| CN115265902A true CN115265902A (en) | 2022-11-01 |
| CN115265902B CN115265902B (en) | 2024-06-11 |
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Citations (12)
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