Mountain full-shoe tractor roll stability test bench

Abstract

The present invention relates to a mountain full-track tractor roll stability test bench, comprising a roll test base and a roll platform, wherein an axle load meter and an angle meter are arranged on the roll platform; a side support plate is convexly arranged on one side of the roll test base, and a support column is convexly arranged on the other side of the roll test base; one side of the roll platform is hingedly connected to the upper end of the side support plate through a hinge mechanism, and the other side of the roll platform is supported on the support column; a lifting mechanism is arranged between the roll test base and the roll platform, and the lifting mechanism is located in the middle position of the other side of the roll test base, and the lifting mechanism adopts a scissor-type hydraulic lifting platform; an anti-rollover frame is connected to the outer side of the side support plate, and the lower surface of the anti-rollover frame is flush with the lower surface of the roll test base. This test bench is more stable and reliable to use; different from a foundation pit test bench, the roll test base and the roll platform can be assembled, disassembled and moved, with low cost and more convenience; the detection function is comprehensive, and the rollover drive of the roll platform is more reasonable.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle testing in physical measurement, and in particular relates to a rolling stability test bench for a mountain full-track tractor. Background Art

[0002] All motor vehicles need to undergo rollover stability tests, including static rollover stability and dynamic rollover stability tests. Wheeled tractors or crawler tractors generally only undergo static rollover stability tests because of their low speed and small centripetal acceleration. Static rollover stability is mainly measured by the maximum rollover stability angle, which is the angle at which the vehicle under test rolls over with the test bench from horizontal to zero when the normal force on the outer wheel support plane is zero.

[0003] In the existing rollover test benches, in order to ensure the stability of use, the connection foundation of the rollover platform is often built in the foundation pit, as disclosed in CN205719563U and CN207516050U. The foundation pit needs civil construction, which is large in engineering volume and high in cost. Moreover, the test can only be carried out at a fixed location, which is inconvenient to use. In order to reduce the construction cost and facilitate transportation, test benches such as CN210198723U and CN211317761U have appeared. The test bench base adopts an assembly structure to solve the problems existing in the foundation pit test bench, but the stability is still insufficient. Only an angle sensor is set on the test bench, and the detection function is limited. CN210198723U adopts an anti-roll frame and a winch to drive the rollover platform to rotate, but there is still a risk that the test bench as a whole will overturn in the rollover direction; a winch is set on the anti-roll frame to pull the rollover platform, and the structure is too complicated. In CN211317761U, the traditional telescopic hydraulic rod is still used between the flip platform and the base, but the length of the hydraulic rod that meets the travel and load-bearing requirements is relatively large. In the original pit-type test bench, the depth of the pit can be increased to accommodate the hydraulic rod, but the spacing between the movable test bench base and the flip platform is small. The use of a longer hydraulic rod can only increase the height of the test bench base accordingly, but there is a high safety hazard when a heavy tractor flips at a high position; in CN211317761U, one end of the hydraulic rod is arranged closer to the hinged side of the test bench base and the flip platform, the lever arm becomes shorter, and the hydraulic rod needs to provide a greater force, which requires a hydraulic rod with a larger load-bearing capacity or the number of hydraulic rods is increased laterally, which increases the cost; the corresponding force points on the test bench base or the flip platform are subjected to greater force, and the structural strength also needs to be improved, resulting in an increase in volume and weight. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a roll stability test bench for mountain full-track tractors, thereby avoiding the problem of insufficient stability of the test bench base and achieving the effects of improved stability, comprehensive detection functions and more reasonable rollover drive.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A mountain full-track tractor roll stability test bench comprises a roll test base and a roll platform rotatably connected to the top of the roll test base, wherein a detection sensor is arranged on the roll platform; a side support plate extending along the length direction of the roll test base is protruded on one side of the roll test base, and support columns are protruded on both ends of the other side of the roll test base; one side of the roll platform is hingedly connected to the upper end of the side support plate through a hinge mechanism to achieve a rotatable connection, and the other side of the roll platform is supported on two support columns so that the initial state of the roll platform is horizontal; a lifting mechanism is arranged between the roll test base and the roll platform to drive the roll platform to rotate, and the lifting mechanism is located in the middle position of the other side of the roll test base, and the lifting mechanism adopts a scissor-type hydraulic lifting platform; the outer side surface of the side support plate is connected to an anti-rollover frame extending in a direction away from the roll test base, and the lower surface of the anti-rollover frame is flush with the lower surface of the roll test base; the detection sensor comprises an axle weight meter and an angle meter.

[0007] To further improve the above technical solution, the upper surface of the scissors-type hydraulic lifting platform is provided with a sliding guide rail whose length direction is perpendicular to the side support plate, and the sliding guide rail is connected with an articulated seat that can slide along its length direction, and the upper end of the articulated seat is pivotally connected to the articulated support ear fixed to the lower surface of the tilt platform through a pivot.

[0008] Furthermore, the articulated mechanism is composed of two sets and is spaced apart along the length direction of the side support plate; the articulated mechanism includes two bearing supports which are arranged parallel and opposite to each other on the side support plate, and a connecting seat which is fixedly connected to the lower surface of the roll platform, and the lower end of the connecting seat is located between the two bearing supports, and rotating shafts are respectively protruded on both sides of the lower end of the connecting seat, and the two rotating shafts are respectively connected to the bearings in the two bearing supports.

[0009] Furthermore, the side support plate includes four vertical columns, which are arranged at intervals along the length direction of the roll test base, and the two outer vertical columns are respectively located at the two ends of the roll test base, and the top ends of the four vertical columns are jointly supported and connected to a cross beam; two sets of hinge mechanisms are respectively located directly above the two middle vertical columns, and two bearing supports of the hinge mechanisms are connected to the cross beam;

[0010] The anti-overturning frames are in two sets and are respectively connected to the outer sides of the two middle vertical columns.

[0011] Furthermore, the axle load meter includes two weighing plates, which are arranged on the upper surface of the roll platform and are spaced apart between the two sides of the roll platform; a load-bearing plate is connected to the weighing sensor in the weighing plate, and the load-bearing plate protrudes from the upper surface of the weighing plate so as to be in force contact with the tractor's crawler track.

[0012] Furthermore, an anti-skid stopper is fixedly connected to the upper surface of the roll platform at a side close to the hinge mechanism.

[0013] Furthermore, a steel cable is fixedly connected to the upper surface of the tilting platform at a side away from the articulated mechanism for connecting the tractor during detection to prevent the tractor from tipping over.

[0014] Further, either end of the roll test base is connected to an inclined platform, a thicker end of the inclined platform is close to the roll test base, and a height of the thicker end corresponds to the roll platform;

[0015] The inclined platform includes four right-angled triangle brackets which are parallel to each other, and the hypotenuses of the four right-angled triangle brackets are jointly supported and connected to a steel plate; the spacing between the two outer right-angled triangle brackets corresponds to the width of the roll test base, the spacing between the two middle right-angled triangle brackets corresponds to the spacing between the two weighing plates, and the two middle right-angled triangle brackets correspond to the two weighing plates respectively in the length direction of the roll test base.

[0016] Furthermore, the tilting platform includes a steel structure frame and a steel plate fully connected to the top of the steel structure frame, the steel structure frame includes a plurality of square tubes welded and fixedly connected in a "sun" shape, and oblique rib square tubes are welded and fixedly connected between the diagonals in the spaces of the "sun" shape.

[0017] Furthermore, the roll test base is a steel structure frame, which includes a plurality of square tubes welded and fixedly connected in a "sun" shape, and two crossed oblique rib square tubes are welded and fixedly connected between the diagonals in the space of the "sun" shape.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The mountain full-track tractor roll stability test bench of the present invention is different from the foundation pit test bench. The roll test base and the roll platform can be assembled, disassembled and moved, with low cost and more convenient use. An anti-overturning frame is added to the side of the roll test base to improve the stability in use and prevent the overall overturning in the direction of the roll platform during the test.

[0020] 2. The roll stability test bench for mountain full-track tractors of the present invention is equipped with an axle load meter and an angle meter on the roll platform, which has more comprehensive detection functions and is convenient for detecting the roll angle, maximum stable roll angle, stable roll angle, etc.

[0021] 3. The roll stability test bench for mountain full-track tractors of the present invention adopts a scissor-type hydraulic lifting platform as the lifting mechanism. A relatively shorter hydraulic cylinder can be used within a smaller stroke range to lift the roll platform to a desired height through the mechanical transmission of the scissor-type lifting platform. When the scissor-type hydraulic lifting platform is in a folded state, it occupies less vertical space and does not increase the height of the roll platform. It can be supported on the roll test base and the end of the roll platform away from the hinge mechanism, has a long lever arm and better force supply conditions, reduces the strength and quantity requirements of the hydraulic unit, reduces costs, and is reliable to use.

[0022] 4. The roll stability test bench for mountain full-shoe tractors of the present invention is easy to purchase raw materials, has little difficulty in assembly and manufacturing, has low cost, and is stable and reliable in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a mountain full-track tractor roll stability test bench of a specific embodiment (rolling platform is in a non-horizontal initial state);

[0024] Figure 2 for Figure 1 A front view of

[0025] Figure 3 for Figure 2 Left view;

[0026] Figure 4 For Figure 1 A schematic diagram showing the tilting platform is hidden as a basis;

[0027] Figure 5 is a bottom view of the roll platform in a specific embodiment;

[0028] Figure 6 is a schematic diagram of a connecting socket in a specific embodiment;

[0029] Among them, there are a roll test base 1, a side support plate 11, a vertical column 111, a cross beam 112, a support column 12, an anti-overturning frame 13, an inclined platform 14, a right-angled triangle bracket 15, a steel plate 16, a roll platform 2, an axle weight meter 21, a weighing plate 211, a load-bearing plate 212, an inclinometer 22, an anti-skid block 23, an articulated mechanism 3, a bearing support 31, a connecting seat 32, a rotating shaft 33, a lifting mechanism 4, a sliding guide rail 41, an articulated seat 42, a pivot 43, and an articulated support ear 44. DETAILED DESCRIPTION

[0030] The specific implementation modes of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] See also Figure 1-Figure 3The roll stability test bench of a mountain full-track tractor of a specific embodiment comprises a rectangular roll test base 1 and a roll platform 2 rotatably connected to the top of the roll test base 1, and a detection sensor is arranged on the roll platform 2; a side support plate 11 extending along the length direction of the roll test base 1 is protruded on one side of the roll test base 1, and support columns 12 are protruded at both ends of the other side of the roll test base 1; one side of the roll platform 2 is hingedly connected to the upper end of the side support plate 11 through a hinge mechanism 3 to realize a rotatable connection, and the other side of the roll platform 2 is supported on the two support columns 12 to make the roll platform The initial state of the platform 2 is horizontal; a lifting mechanism 4 is provided between the roll test base 1 and the roll platform 2 for driving the roll platform 2 to rotate, and the lifting mechanism 4 is located in the middle position of the other side of the roll test base 1, that is, between the two supporting columns 12, and the lifting mechanism 4 adopts a scissor-type hydraulic lifting platform, specifically a first-level scissor-type hydraulic lifting platform; the outer side surface of the side support plate 11 is connected to an anti-overturning frame 13 extending in a direction away from the roll test base 1, and the lower surface of the anti-overturning frame 13 is flush with the lower surface of the roll test base 1; the detection sensor includes an axle weight meter 21 and an angle meter 22.

[0032] The mountain full-track tractor roll stability test bench of the embodiment is different from the foundation pit test bench. The roll test base 1 and the roll platform 2 can be assembled, disassembled and moved, with low cost and more convenient use. An anti-rollover frame 13 is added to the side of the roll test base 1 to improve the stability in use and prevent the entire tractor from overturning in the direction of the roll platform 2 during the test. The roll platform 2 is equipped with an axle load meter 21 and an angle meter 22, which has more comprehensive detection functions and is convenient for detecting the roll angle, maximum stable roll angle and stable roll angle. angle), etc.; the lifting mechanism 4 adopts a scissor-type hydraulic lifting platform, which can use a shorter hydraulic cylinder within a smaller stroke range to lift the roll platform 2 to the required height through the mechanical transmission of the scissor-type lifting platform; when the scissor-type hydraulic lifting platform is in the folded state, it occupies less vertical space and will not increase the height of the roll platform 2, and can be supported on the roll test base 1 and the end of the roll platform 2 away from the hinge mechanism 3, with a long lever arm and better force supply conditions, thereby reducing the force and quantity requirements of the hydraulic unit, reducing costs, and being reliable to use.

[0033] See also Figure 4-Figure 6, wherein the articulated mechanism 3 is composed of two sets and is spaced apart along the length direction of the side support plate 11; the articulated mechanism 3 includes two bearing supports 31 arranged parallel to and opposite to the side support plate 11, and a connecting seat 32 fixedly connected to the lower surface of the roll platform 2, the lower end of the connecting seat 32 is located between the two bearing supports 31, and both sides of the lower end of the connecting seat 32 are respectively protruded with rotating shafts 33, and the two rotating shafts 33 are respectively connected to the bearings in the two bearing supports 31.

[0034] In this way, a plurality of bearing supports 31 are used to share the overall load, and thus the dynamic load of the roll platform 2 during the entire detection movement process can be effectively supported.

[0035] Please continue to see Figure 1-Figure 3 The upper surface of the scissor-type hydraulic lifting platform is provided with a sliding guide rail 41 whose length direction is perpendicular to the side support plate 11, and the sliding guide rail 41 is connected with a hinge seat 42 that can slide along its length direction. The upper end of the hinge seat 42 is pivotally connected to a hinge support ear 44 fixed to the lower surface of the tilt platform 2 through a pivot 43.

[0036] In this way, the lifting process of the scissor-type hydraulic lifting platform can be more stable and smooth. The two ends of the hydraulic rod used in the conventional method are both hinged. The scissor-type hydraulic lifting platform used in the present invention lacks one degree of freedom between the lifting platform and the tilting platform 2. If it is lifted directly, it is easy to damage the lifting platform or the tilting platform 2 by friction, and it is not flexible enough. After adding the sliding guide rail 41 and the hinged connection, the degree of freedom requirement can be met, and the use is more stable and reliable.

[0037] It can be understood that the axes of the pivot 43 and the rotating shaft 33 are parallel and correspond to the length direction of the roll test base 1. In this embodiment, in order to unify parts and reduce costs, the hinge seat 42 and the hinge lug 44 also adopt the same structural form as the connecting seat 32 and the bearing support 31 in the hinge mechanism 3.

[0038] Please continue to see Figure 4 The side support plate 11 includes four vertical columns 111, which are equidistantly arranged along the length direction of the roll test base 1. The two outer vertical columns 111 are respectively located at the two ends of the roll test base 1, and the tops of the four vertical columns 111 are jointly supported and connected to a cross beam 112; the two sets of hinged mechanisms 3 are respectively located directly above the two middle vertical columns 111, and the two bearing supports 31 of the hinged mechanisms 3 are connected to the cross beam 112; the anti-overturning frame 13 is two sets and is respectively connected to the outer sides of the two middle vertical columns 111.

[0039] In this way, the structural strength of the side support plate 11 and the use effect of the anti-overturning frame 13 connected thereto can be effectively guaranteed.

[0040] Please continue to see Figure 1 , Figure 3 The axle load meter 21 includes two weighing plates 211, which are arranged on the upper surface of the roll platform 2 and spaced between the two sides of the roll platform 2; a load-bearing plate 212 is connected to the load cell in the weighing plate 211, and the load-bearing plate 212 protrudes from the upper surface of the weighing plate 211 so as to be in force contact with the crawler of the tractor. The inclinometer 22 is installed at the center of the upper surface of the roll platform 2.

[0041] Because general axle load meters are designed for wheeled vehicles, the lower part of the tire can effectively contact the weighing sensor in the weighing plate to ensure the accuracy of the detection, but the crawler structure is usually longer, and the crawler contacting the weighing plate 211 will reduce the detection accuracy, so the load-bearing plate 212 is connected to the weighing sensor to make it have the highest protrusion height so that it can effectively contact the crawler. During implementation, the load-bearing plate 212 is made of a lightweight, compression-resistant and wear-resistant material with uniform density. In the length direction of the roll platform 2, two weighing plates 211 can also be arranged at intervals to carry a tractor with a longer crawler.

[0042] The upper surface of the roll platform 2 is also fixedly connected to an anti-skid block 23 on the side close to the articulated mechanism 3. There are two anti-skid blocks 23, which are arranged at intervals along the length direction of the roll platform 2. In this way, the locomotive can be prevented from skidding during the detection process. The upper surface of the roll platform 2 is also fixedly connected to a flexible steel cable (not shown in the figure) on the side away from the articulated mechanism 3 to connect to the tractor during the detection to prevent the tractor from tipping over.

[0043] Please continue to see Figure 1 , wherein, an inclined platform 14 is connected to either end of the roll test base 1, the thicker end of the inclined platform 14 is close to the roll test base 1, and the height of the thicker end corresponds to the roll platform 2; the inclined platform 14 includes four mutually parallel right-angled triangle brackets 15, and the hypotenuses of the four right-angled triangle brackets 15 are jointly supported and connected with a steel plate 16; the spacing between the two outer right-angled triangle brackets 15 corresponds to the width of the roll test base 1, the spacing between the two middle right-angled triangle brackets 15 corresponds to the spacing between the two weighing plates 211 (bearing plates 212), and the two middle right-angled triangle brackets 15 correspond to the two weighing plates 211 (bearing plates 212) in the length direction of the roll test base 1.

[0044] In this way, it is convenient for the tractor to drive on the tilting platform 2, and the two middle right-angled triangle brackets 15 are directly opposite to the center of the tractor crawler track to better support the overall weight of the tractor. The tractor can drive straight over the inclined platform 14 and act on the bearing plate 212, ensuring the safety and convenient implementation of the detection process.

[0045] In this embodiment, in order to unify parts and reduce costs, the anti-overturning frame 13 also adopts a right-angled triangle bracket structure, with a right angle side fixedly connected to the vertical column 111 and the bottom surface of the right angle side flush with the lower surface of the roll test base 1.

[0046] Please continue to see Figure 1 , Figure 5 In this embodiment, the tilt platform 2 includes a steel structure frame and a steel plate fully connected to the top of the steel structure frame. The steel structure frame includes a plurality of square tubes welded and fixedly connected in a "sun" shape, and cross oblique rib square tubes are welded and fixedly connected between the diagonals in the spaces of the "sun" shape.

[0047] Please continue to see Figure 4 The roll test base 1 is also a steel structure frame, including a plurality of square tubes welded and fixedly connected in a "sun" shape, and two cross-oblique rib square tubes are welded and fixedly connected between the diagonals in the space of the "sun" shape.

[0048] In order to unify parts and reduce costs, the present embodiment uniformly adopts Q235 square steel tube (GB / T 8162-1999) material, and the steel plate uses patterned steel plate (GB / T 3277-1991) 3mm material.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A mountain full-track tractor roll stability test bench, comprising a roll test base and a roll platform rotatably connected to the roll test base, wherein a detection sensor is provided on the roll platform; the characteristics are: A side support plate extending along the length direction of the roll test base is protruded on one side of the roll test base, and support columns are protruded on both ends of the other side of the roll test base; one side of the roll platform is hingedly connected to the upper end of the side support plate through a hinge mechanism to achieve a rotation connection, and the other side of the roll platform is supported on two support columns so that the initial state of the roll platform is horizontal; a lifting mechanism is provided between the roll test base and the roll platform to drive the roll platform to rotate, and the lifting mechanism is located in the middle position of the other side of the roll test base, and the lifting mechanism adopts a scissor-type hydraulic lifting platform; The outer side surface of the side support plate is connected to an anti-overturning frame extending in a direction away from the roll test base, and the lower surface of the anti-overturning frame is flush with the lower surface of the roll test base; The detection sensors include an axle load meter and an angle meter.

2. The mountain full-shoe tractor roll stability test bench according to claim 1, characterized in that: The upper surface of the scissor-type hydraulic lifting platform is provided with a sliding guide rail whose length direction is perpendicular to the side support plate. The sliding guide rail is connected with an articulated seat that slides along its length direction. The upper end of the articulated seat is pivotally connected to the articulated support ear fixed to the lower surface of the tilting platform through a pivot.

3. The roll stability test bench for mountain full-shoe tractors according to claim 1 is characterized by: The hinge mechanism consists of two sets and is arranged at intervals along the length direction of the side support plate; the hinge mechanism includes two bearing supports arranged parallel and opposite to each other on the side support plate, and a connecting seat fixedly connected to the lower surface of the roll platform, the lower end of the connecting seat is located between the two bearing supports, and both sides of the lower end of the connecting seat are respectively protruded with rotating shafts, and the two rotating shafts are respectively connected to the bearings in the two bearing supports.

4. The roll stability test bench for mountain full-shoe tractors according to claim 3 is characterized by: The side support plate includes four vertical columns, which are arranged at intervals along the length direction of the roll test base, and the two outer vertical columns are respectively located at the two ends of the roll test base, and the tops of the four vertical columns are jointly supported and connected to a cross beam; two sets of hinge mechanisms are respectively located directly above the two middle vertical columns, and two bearing supports of the hinge mechanisms are connected to the cross beam; The anti-overturning frames are in two sets and are respectively connected to the outer sides of the two middle vertical columns.

5. The roll stability test bench for mountain full-shoe tractors according to claim 1 is characterized by: The axle load meter includes two weighing plates, which are arranged on the upper surface of the roll platform and spaced apart between the two sides of the roll platform; a load-bearing plate is connected to the weighing sensor in the weighing plate, and the load-bearing plate protrudes from the upper surface of the weighing plate so as to be in force contact with the crawler of the tractor.

6. The roll stability test bench for mountain full-shoe tractors according to claim 5, characterized in that: The upper surface of the roll platform is also fixedly connected with an anti-skid stopper at a side close to the hinge mechanism.

7. The roll stability test bench for mountain full-shoe tractors according to claim 6 is characterized by: A steel cable is also fixedly connected to the upper surface of the tilting platform at a side away from the articulated mechanism for connecting the tractor during detection to prevent the tractor from tipping over.

8. The roll stability test bench for mountain full-shoe tractors according to claim 5 is characterized by: Either end of the roll test base is connected to an inclined platform, the thickest end of the inclined platform is close to the roll test base, and the height of the thickest end corresponds to the roll platform; The inclined platform includes four right-angled triangle brackets which are parallel to each other, and the hypotenuses of the four right-angled triangle brackets are jointly supported and connected to a steel plate; the spacing between the two outer right-angled triangle brackets corresponds to the width of the roll test base, the spacing between the two middle right-angled triangle brackets corresponds to the spacing between the two weighing plates, and the two middle right-angled triangle brackets correspond to the two weighing plates respectively in the length direction of the roll test base.

9. The mountain full-shoe tractor roll stability test bench according to any one of claims 1 to 8, characterized in that: The roll platform includes a steel structure frame and a steel plate fully laid and connected above the steel structure frame. The steel structure frame includes multiple square tubes welded and fixedly connected in a "day" shape, and diagonal rib square tubes are welded and fixedly connected between the diagonals in the space of the "day" shape.

10. The mountain full-shoe tractor roll stability test bench according to any one of claims 1 to 8, characterized in that: The roll test base is a steel structure frame. The steel structure frame includes multiple square tubes welded and fixedly connected in a "day" shape, and two intersecting diagonal rib square tubes are welded and fixedly connected between the diagonals in the space of the "day" shape.

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