CN115165401A - Agricultural machinery wheel performance test device - Google Patents
Agricultural machinery wheel performance test device Download PDFInfo
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- CN115165401A CN115165401A CN202211098584.1A CN202211098584A CN115165401A CN 115165401 A CN115165401 A CN 115165401A CN 202211098584 A CN202211098584 A CN 202211098584A CN 115165401 A CN115165401 A CN 115165401A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/013—Wheels
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Abstract
The invention relates to the field of wheel performance testing, in particular to an agricultural machinery wheel performance testing device which comprises a platform and a wheel testing mechanism, wherein a soil groove filled with soil is formed in the top surface of the platform, the wheel testing mechanism comprises a wheel support, a driving mechanism and wheels, the wheels are rotatably arranged on the wheel support, and the driving mechanism for driving the wheels is arranged on the wheel support. The turning device is characterized by further comprising a movable cross beam and a turning mechanism, wherein front and rear slide rails are arranged on the left and right sides of the top of the platform respectively through a support, the left and right ends of the movable cross beam are arranged in the front and rear slide rails in a sliding mode respectively, a plurality of vertical guide rods are arranged at the bottom of the movable cross beam, and the turning mechanism capable of enabling the wheel testing mechanism to turn around is arranged on each guide rod in a sliding mode. Compared with the prior art, the invention increases the stroke by turning and turning around the wheels in the test, and simultaneously realizes the turning test and the straight line test of the wheels under the condition that the advancing direction of the wheels is kept unchanged.
Description
Technical Field
The invention relates to the field of wheel performance testing, in particular to an agricultural machinery wheel performance testing device.
Background
In order to obtain the wheel performance special for farmland, such as parameters of slip rate, soil pressure and the like, the wheel needs to be subjected to performance tests. Because outdoor tests are influenced by uncertain factors such as weather changes and the like, the indoor soil tank test becomes an important means for researching the interaction between the wheels and the soil, and compared with a field test, the indoor soil tank test has the advantages of short test period, accurate data and high controllability. However, the existing test device has the defects that as designed in the granted patent CN209513283U, the test stroke as the test device is too short, the slip ratio error is large, and the length of the soil tank is directly lengthened, so that the test device occupies space. And reciprocating motion is carried out on the soil groove with too short stroke, and the measured slip ratio is different from the actual slip ratio due to different patterns when the tire rotates forwards and reversely.
Disclosure of Invention
Aiming at the defects of the prior art, the invention designs the agricultural machinery wheel performance test device which can reduce the occupied space as much as possible and ensure the test stroke to solve the problem.
The technical scheme adopted by the invention for solving the technical problems is as follows: the agricultural machinery wheel performance test device comprises a platform and a wheel test mechanism in the prior art, wherein a soil groove filled with soil is arranged on the top surface of the platform, the wheel test mechanism comprises a wheel support, a driving mechanism and wheels, the wheels are rotatably arranged on the wheel support, and the driving mechanism for driving the wheels is arranged on the wheel support; the invention is characterized in that the invention also comprises a movable beam and a turning mechanism, wherein the left side and the right side of the top of the platform are respectively provided with a front sliding rail and a rear sliding rail through a bracket, the left end and the right end of the movable beam are respectively arranged in the front sliding rail and the rear sliding rail in a sliding manner, the bottom of the movable beam is provided with a plurality of vertical guide rods, and the turning mechanism can be arranged on the guide rods in a sliding manner up and down;
the turning mechanism comprises a lifting platform, an S-shaped track, a first rotating shaft and a second rotating shaft, wherein the S-shaped track is horizontally arranged below the lifting platform, the head end and the tail end of the S-shaped track are provided with upward extending ends fixedly connected with the bottom of the lifting platform, the S-shaped track is provided with an upper opening and a lower opening, a gap is reserved between the top of the S-shaped track and the lifting platform, the S-shaped track is formed by butting two semicircular tracks, the bottom of the lifting platform is respectively and vertically provided with the first rotating shaft and the second rotating shaft at the two circle centers of the S-shaped track, and a reset torsion spring for enabling the first rotating shaft and the second rotating shaft to face the right is arranged between the first rotating shaft and the lifting platform; a first vertical support and a second vertical support are respectively arranged on one side of the first rotating shaft and one side of the second rotating shaft, a first electromagnetic bolt and a second electromagnetic bolt are respectively arranged on the first vertical support and the second vertical support, an inward third electromagnetic bolt and an inward fourth electromagnetic bolt are respectively arranged at the head end and the tail end of the S-shaped curved track, a sliding column is arranged at the top of the wheel support, the wheel support is slidably arranged in the S-shaped curved track through the sliding column, and pin holes are respectively arranged on two sides of the sliding column;
the S-shaped bent track is provided with a first travel switch matched with the first vertical support and a second travel switch matched with the second vertical support; spring telescopic rods are arranged at the front end and the rear end in the front sliding rail and the rear sliding rail respectively, and a third travel switch and a fourth travel switch matched with the spring telescopic rods are arranged at the front end and the rear end of the movable cross beam respectively.
Further, in an initial state, the sliding column is located between the first electromagnetic bolt and the third electromagnetic bolt, and the first electromagnetic bolt and the third electromagnetic bolt are opened; when the third stroke switch is triggered for the first time, the third electromagnetic bolt is closed; when the first travel switch is triggered, the second electromagnetic bolt is opened; when the fourth travel switch is triggered, the first electromagnetic bolt is closed; when the second travel switch is triggered, the fourth electromagnetic bolt is opened; and when the third travel switch is triggered for the second time, the driving mechanism stops driving.
The soil shoveling mechanism comprises a lifting mechanism, a lifting support, a supporting plate, a spreading mechanism, a telescopic mechanism, a supporting plate, side plates and a bidirectional spreading mechanism; the lifting mechanism is fixed below the open slot, a lifting support is fixed on an output shaft of the lifting mechanism, the top of the lifting support is hinged with the bottom of the supporting plate, a spreading mechanism is arranged between the lifting support and the supporting plate, the supporting plate is connected with a supporting plate through a telescopic mechanism, the front side and the rear side of the supporting plate are respectively hinged with a side plate, and the two side plates are respectively hinged with an output shaft of the bidirectional spreading mechanism at the right end; the pressure sensor is buried in the soil.
Furthermore, the left end of the side plate is provided with a blade.
Furthermore, a hydraulic mechanism is fixedly arranged at the bottom of the movable cross beam and positioned above the lifting platform, and a second pressure sensor is arranged at the front end of a piston rod of the hydraulic mechanism.
Furthermore, a sliding assembly matched with the S-shaped curved track is arranged on the sliding column.
Furthermore, a plurality of pulleys matched with the front and rear sliding rails are arranged at the left end and the right end of the movable cross beam respectively.
Furthermore, the top end of the sliding column is provided with a ball or a roller.
The invention has the beneficial effects that: the invention increases the stroke by turning and turning the wheels in the test, and simultaneously realizes the turning test and the straight line test of the wheels under the condition that the advancing direction of the wheels is kept unchanged. In addition, the soil pressure is tested through the convenient and fast realization of the soil shoveling mechanism, so that the performance data of the wheels can be acquired more comprehensively.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an elevational, cross-sectional view of the present invention;
FIG. 3 is an enlarged view of detail A in FIG. 2;
FIG. 4 is a partial schematic structural view of the present invention;
FIG. 5 is a bottom view of a portion of the present invention;
FIG. 6 is a partial top sectional view of the front and rear rails of the present invention;
FIG. 7 is a schematic structural view of the shoveling mechanism in a folded state;
fig. 8 is a schematic structural view of the shovel mechanism in a fully opened state.
In the figure: the device comprises a platform 1, a soil groove 11, an open groove 111, a bracket 12, a front and rear slide rail 13, a spring telescopic rod 131, a wheel testing mechanism 2, a pin hole 20, a wheel bracket 21, a driving mechanism 22, a driving belt 221, a wheel 23, a sliding column 24, a ball 241, a movable cross beam 3, a pulley 31, a guide rod 32, a turning mechanism 4, a lifting table 41, an S-shaped rail 42, an extending end 421, a first rotating shaft 43, a first vertical bracket 431, a second rotating shaft 44, a second vertical bracket 441, a first electromagnetic bolt 51, a second electromagnetic bolt 52, a third electromagnetic bolt 53, a fourth electromagnetic bolt 54, a first travel switch 61, a second travel switch 62, a third travel switch 63, a fourth travel switch 64, a soil shoveling mechanism 7, a lifting mechanism 71, a lifting bracket 72, a supporting plate 73, a propping mechanism 74, a telescopic mechanism 75, a supporting plate 76, a side plate 77, a bidirectional propping mechanism 78, a hydraulic mechanism 8, a second pressure sensor 81 and soil 9.
Detailed Description
For a better understanding of the present invention, embodiments of the present invention are explained in detail below with reference to fig. 1 to 8.
It should be noted that the directions "front, back, left, right, up and down" described herein are based on the directions "front, back, left, right, up and down" in fig. 1. For the sake of clarity, the length of the device in fig. 1 is shortened, and the actual length can be 3-5 m according to the needs. The thickness of the soil in fig. 2 is also thinner than that of the normal soil tank soil.
The agricultural machinery wheel performance test device of the invention, as shown in fig. 1 to fig. 4, comprises a platform 1 and a wheel test mechanism 2 in the prior art, wherein the top surface of the platform 1 is provided with a soil groove 11 filled with soil 9, the wheel test mechanism 2 comprises a wheel bracket 21, a driving mechanism 22 (an engine or a motor) and a wheel 23, and the rotation number of the wheel 23 and the stroke measurement device of the wheel bracket 21 are the same as the prior art and are not repeated herein. It should be noted that the stroke measurement of the conventional wheel support 21 is a linear distance, and the increase of the stroke of the S-curved rail 42 in the present invention only requires the increase of the distance of the S-curved rail 42 in the measured linear distance. The wheel bracket 21 is rotatably provided with a wheel 23, and the wheel bracket 21 is provided with a driving mechanism 22 which drives the wheel 23 through a driving belt 221. The difference is that the invention also comprises a movable beam 3 and a turning mechanism 4, wherein the left side and the right side of the top of the platform 1 are respectively provided with a front sliding rail 13 and a rear sliding rail 13 through a bracket 12, the left end and the right end of the movable beam 3 are respectively arranged in the front sliding rail 13 and the rear sliding rail 13 in a sliding manner, and meanwhile, in order to reduce friction force, the left end and the right end of the movable beam 3 are respectively provided with a plurality of pulleys 31 matched with the front sliding rail 13 and the rear sliding rail 13. The bottom of the movable beam 3 is provided with a plurality of vertical guide rods 32, and the guide rods 32 can be provided with turning mechanisms 4 for turning the wheels 23 up and down in a sliding manner.
The turning mechanism 4 includes a lifting platform 41, an S-shaped rail 42, a first rotating shaft 43 and a second rotating shaft 44, the lifting platform 41 is slidably disposed on the guide rod 32 through a guide hole, the S-shaped rail 42 is horizontally disposed below the lifting platform 41, the head and tail ends of the S-shaped rail 42 are provided with extending ends 421 whose tops are fixedly connected to the bottom of the lifting platform 41, the middle of the S-shaped rail 42 is opened up and down, and a gap is left between the top of the S-shaped rail 42 and the lifting platform 41. In fig. 5, the S-shaped curved track 42 is formed by two semicircular tracks in a butt joint manner, the bottom of the lifting platform 41 is respectively and vertically provided with a first rotating shaft 43 and a second rotating shaft 44 at two semicircular centers of the S-shaped curved track 42, and a reset torsion spring for enabling the first rotating shaft 43 and the second rotating shaft 44 to face right is arranged between the lifting platform 41 and the first rotating shaft 43 and the second rotating shaft 44. First vertical brackets 431 are horizontally extended above and below the first rotating shaft 43 and are located above and below the S-bend rail 42. Second vertical brackets 441 are horizontally extended above and below the S-shaped rail 42 above and below the second rotating shaft 44, and the first vertical bracket 431 and the second vertical bracket 441 above are located between the S-shaped rail 42 and the lifting table 41. The two first vertical brackets 431 are respectively provided with a first electromagnetic latch 51. The two second vertical supports 441 are respectively provided with a second electromagnetic latch 52.
As shown in fig. 5, the head end and the tail end of the S-shaped rail 42 are also respectively provided with a third electromagnetic bolt 53 and a fourth electromagnetic bolt 54 facing inwards, and two sides of the sliding column 24 are respectively provided with a pin hole 20. The slide column 24 is arranged on the top of the wheel bracket 21, the wheel bracket 21 is slidably arranged in the S-curved track 42 through the slide column 24, and in order to reduce the friction force, the slide column 24 can smoothly slide in the S-curved track 42, as shown in fig. 3, the top end of the slide column 24 is provided with a ball 241 or a roller. In addition, a sliding component matched with the S-shaped curved track can be arranged on the sliding column 24, and specifically, rollers are respectively arranged on two opposite surfaces of the sliding column 24 and the inner side wall of the S-shaped curved track.
As shown in fig. 5, the S-curved track 42 is provided with a first travel switch 61 cooperating with a first vertical bracket 431 and a second travel switch 62 cooperating with a second vertical bracket 441. Spring telescopic rods 131 are respectively arranged at the front end and the rear end in the front and rear sliding rails 13, and a third travel switch 63 and a fourth travel switch 64 which are matched with the spring telescopic rods 131 are respectively arranged at the front end and the rear end of the movable cross beam 3.
In order to enable the automatic operation of the invention, all parts replace manual instructions through interconnection triggering instructions, and the method specifically comprises the following steps: in an initial state, the sliding column 24 is located between the first electromagnetic bolt 51 and the third electromagnetic bolt 53, and the first electromagnetic bolt 51 and the third electromagnetic bolt 53 are opened and inserted into the pin hole 20, so that both the left and right sides of the sliding column 24 are limited and locked. When the third stroke switch 63 is triggered for the first time, the third electromagnetic bolt 53 is closed and then pulled out from the pin hole 20, so that the right side of the sliding column 24 is relieved from limiting. When the first rotating shaft 43 rotates 180 °, the first vertical bracket 431 is just released and triggers the first stroke switch 61, and the second electromagnetic latch 52 is opened. When the fourth travel switch 64 is triggered, the first electromagnetic bolt 51 is closed, and when the second rotating shaft 44 rotates 180 degrees, the second vertical bracket 441 just contacts and triggers the second travel switch 62, and at this time, the fourth electromagnetic bolt 54 is opened, so that the left side and the right side of the sliding column 24 are both limited and locked. In this way, the wheel 23 achieves a turning motion.
Due to the fact that the wheels 23 in different forms and specifications and sizes have different pressures on the soil 9, the soil 9 is easily compacted under overlarge pressures to cause hardening, and plant growth is affected. When the existing test device tests the influence of the wheels 23 on the pressure of the soil 9, the actual pressure under the soil 9 cannot be measured generally by judging the depth of the pressed groove, and a tester digs a pit in the soil groove 11 and puts a pressure sensor into the pit, but the soil structure at the pit position changes greatly after digging the pit, so that experimental data has errors. Therefore, in order to acquire more accurate data, the invention also comprises a pressure sensor and a soil shoveling mechanism 7, wherein the soil shoveling mechanism 7 shovels part of soil integrally and then puts the pressure sensor in the pit for detection. Specifically, the right side of the soil trough 11 is provided with a plurality of open grooves 111 (3 are drawn in fig. 1 for convenience and clarity of view), each open groove 111 is provided with a soil shoveling mechanism 7 for grooving in soil, and the soil shoveling mechanism 7 comprises a lifting mechanism 71 (preferably adopting a hydraulic rod), a lifting support 72, a support plate 73, a spreading mechanism 74 (preferably adopting a hydraulic rod), a telescoping mechanism 75 (preferably adopting a hydraulic rod), a support plate 76, a side plate 77 and a bidirectional spreading mechanism 78 (preferably adopting a bidirectional hydraulic rod). The lifting mechanism 71 is fixed on the soil groove wall below the open groove 111, the lifting support 72 is fixed on an output shaft of the lifting mechanism 71, the top of the lifting support 72 is hinged to the bottom of the supporting plate 73, the opening mechanism 74 is arranged between the lifting support 72 and the supporting plate 73, the supporting plate 73 is connected with a supporting plate 76 through a telescopic mechanism 75, the front side and the rear side of the supporting plate 76 are respectively hinged to the side plate 77, the right end between the two side plates 77 is provided with the two-way opening mechanism 78, and two output ends of the two-way opening mechanism 78 are respectively hinged to the two side plates 77. In order to smoothly shovel earth and reduce the burden on the telescopic mechanism 75, a blade is provided at the left end of the side plate 77.
As shown in fig. 1 and 7, the shoveling mechanism 7 is folded when not in operation, occupies as little space and causes interference as possible, and is fully spread when shoveling is needed. As shown in fig. 7, the soil shoveling mechanism 7 aligns one end of two side plates 77 hinged on the support plate by the contraction of a bidirectional expanding mechanism 78, so that the three side plates are combined into a triangular shovel with an open top, the support plate 73 can be perpendicular to one side of the lifting support 72 by the supporting force of the expanding mechanism 74, the combined triangular shovel can be inserted into the soil 9 by expanding of the expanding mechanism 75, and then the lifting mechanism 71 is lifted, so that the soil left in the triangular shovel can be lifted at the same time. At this time, the worker places the pressure sensor in the shoveled soil pit. After the pressure sensor is placed, the bidirectional propping mechanism 78 props, the side plate 77 is opened around a hinge point, the internal soil falls into the soil pit again, and then the soil shoveling mechanism 7 is folded again for resetting.
In order to simulate the load of the wheels 23, as shown in fig. 2, a hydraulic mechanism 8 (hydraulic rod) is fixedly disposed at the bottom of the movable beam 3 above the lifting platform 41, a second pressure sensor 81 is disposed at the front end of a piston rod of the hydraulic mechanism 8, and the hydraulic shaft of the hydraulic mechanism 8 applies pressure to the top surface of the lifting platform 3 to increase the load of the wheels 23.
Before the testing of the wheels 23 is started, the wheels 23 to be tested are firstly installed, and if the pressure of the wheels 23 on the soil 9 needs to be tested simultaneously, the pressure sensors are buried in advance after the soil pit is shoveled by the soil shoveling mechanism 7. When the test is started, the driving mechanism 22 drives the wheel 23 to start to rotate backwards, and the wheel moves forwards on the soil 9 in the soil tank 11, and simultaneously drives the wheel testing mechanism 2 and the movable cross beam 3 connected with the wheel to move synchronously. When the third travel switch 63 on the moving beam 3 is triggered by the telescopic spring rod 131, the moving beam is about to move to the edge of the soil trough 11, and the turning position is reached. Next, the third electromagnetic latch 53 is pulled out from the right pin hole 20, and the right side of the spool 24 is disconnected, and only the connection between the left side and the first rotation shaft 43 is maintained. As the wheel 23 continues to turn, the wheel 23 begins to turn around the first pivot 43 and the first semicircular track of the S-turn track 42 because only one side is connected. When the wheel 23 is turned around, the first vertical bracket 431 will trigger the first travel switch, so that the second electromagnetic bolt 52 on the second vertical bracket 441 is opened, and the left and right sides of the sliding column 24 are limited again. As the wheel 23 continues to rotate, the wheel 23 starts forward rotational travel. When the fourth travel switch 64 is triggered, the second turning round is started, and at this time, the first electromagnetic latch 51 is closed, and only the second rotating shaft 44 is left to be connected with the spool 24, so that the spool 24 is forced to rotate around the second rotating shaft 44 to turn round. After the wheel 23 completes the second turning around, the second vertical support 441 will trigger the second travel switch 62, so that the third electromagnetic bolt 53 at the end of the S-bend rail 42 is opened, and the left and right sides of the sliding column 24 are re-limited.
Claims (8)
1. The agricultural machinery wheel performance test device comprises a platform and a wheel test mechanism, wherein a soil tank filled with soil is arranged on the top surface of the platform, the wheel test mechanism comprises a wheel support, a driving mechanism and wheels, the wheels are rotatably arranged on the wheel support, and the driving mechanism for driving the wheels is arranged on the wheel support; the method is characterized in that: the left side and the right side of the top of the platform are respectively provided with a front sliding rail and a rear sliding rail through a support, the left end and the right end of the movable cross beam are respectively arranged in the front sliding rail and the rear sliding rail in a sliding manner, the bottom of the movable cross beam is provided with a plurality of vertical guide rods, and the guide rods are provided with turning mechanisms in a sliding manner up and down;
the turning mechanism comprises a lifting platform, an S-shaped track, a first rotating shaft and a second rotating shaft, wherein the S-shaped track is horizontally arranged below the lifting platform, the first rotating shaft and the second rotating shaft are respectively and vertically arranged at the two semicircular centers of the S-shaped track at the bottom of the lifting platform, and reset torsion springs are respectively arranged between the first rotating shaft and the lifting platform and between the first rotating shaft and the second rotating shaft and the lifting platform; a first electromagnetic bolt and a second electromagnetic bolt are respectively and vertically arranged on one side of the first rotating shaft and one side of the second rotating shaft, a third electromagnetic bolt and a fourth electromagnetic bolt are respectively and inwardly arranged at the head end and the tail end of the S-shaped curved track, a sliding column is arranged at the top of the wheel support, the wheel support is slidably arranged in the S-shaped curved track through the sliding column, and pin holes are respectively arranged on the two sides of the sliding column;
the S-shaped bent track is provided with a first travel switch matched with the first bolt and a second travel switch matched with the second bolt; and the front end and the rear end in the front sliding rail and the rear sliding rail are respectively provided with a spring telescopic rod, and the front end and the rear end of the movable cross beam are respectively provided with a third travel switch and a fourth travel switch which are matched with the spring telescopic rods.
2. The agricultural vehicle wheel performance testing apparatus of claim 1, wherein: in an initial state, the sliding column is positioned between the first electromagnetic bolt and the third electromagnetic bolt, and the first electromagnetic bolt and the third electromagnetic bolt are opened; when the third stroke switch is triggered for the first time, the third electromagnetic bolt is closed; when the first travel switch is triggered, the second electromagnetic bolt is opened; when the fourth travel switch is triggered, the first electromagnetic bolt is closed; and when the second travel switch is triggered, the fourth electromagnetic bolt is opened.
3. The agricultural vehicle wheel performance testing apparatus of claim 1, wherein: the soil shoveling mechanism comprises a lifting mechanism, a lifting support, a supporting plate, a spreading mechanism, a telescopic mechanism, a supporting plate, side plates and a bidirectional spreading mechanism; the lifting mechanism is fixed below the open slot, a lifting support is fixed on an output shaft of the lifting mechanism, the top of the lifting support is hinged to the bottom of the supporting plate, a spreading mechanism is arranged between the lifting support and the supporting plate, the supporting plate is connected with a supporting plate through a telescopic mechanism, the front side and the rear side of the supporting plate are respectively hinged to side plates, a bidirectional spreading mechanism is arranged at the right end between the two side plates, and two output ends of the bidirectional spreading mechanism are respectively hinged to the two side plates.
4. The agricultural vehicle wheel performance testing apparatus as defined in claim 3, wherein: the left end of the side plate is provided with a cutting edge.
5. The agricultural vehicle wheel performance testing apparatus of claim 1, wherein: the bottom of the movable cross beam is fixedly provided with a hydraulic mechanism located above the lifting platform, and the front end of a piston rod of the hydraulic mechanism is provided with a second pressure sensor.
6. The agricultural vehicle wheel performance testing apparatus of claim 1, wherein: and the sliding column is provided with a sliding assembly matched with the S-shaped curved track.
7. The agricultural vehicle wheel performance testing apparatus of claim 1, wherein: and a plurality of pulleys matched with the front and rear sliding rails are arranged at the left end and the right end of the movable cross beam respectively.
8. The agricultural vehicle wheel performance testing apparatus of claim 1, wherein: and the top end of the sliding column is provided with a ball or a roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211098584.1A CN115165401B (en) | 2022-09-09 | 2022-09-09 | Agricultural machinery wheel performance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211098584.1A CN115165401B (en) | 2022-09-09 | 2022-09-09 | Agricultural machinery wheel performance test device |
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| Publication Number | Publication Date |
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| CN115165401A true CN115165401A (en) | 2022-10-11 |
| CN115165401B CN115165401B (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211098584.1A Active CN115165401B (en) | 2022-09-09 | 2022-09-09 | Agricultural machinery wheel performance test device |
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|---|---|
| CN115165401B (en) | 2022-11-22 |
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