CN116754264A - A tire-soil interaction test platform - Google Patents

Abstract

The invention discloses a tire-soil interaction test platform which comprises a soil tank tractor, a six-component force measuring rack, a load frame and a soil tank, wherein the soil tank tractor and the load frame are both positioned in the soil tank, the six-component force measuring rack is fixedly connected between the soil tank tractor and the load frame, the load frame comprises a load box, a frame, tires, a suspension bracket and a limiting bracket, the upper surface of the frame is provided with a sliding connected load box, the lower surface of the frame is provided with a tire in rotary connection, the front end of the frame is fixedly connected with the suspension bracket, the tail part of the frame is fixedly connected with the limiting bracket, and the end part of the limiting bracket is fixedly connected with a limiting wheel. The invention utilizes the soil tank tractor, the six-component force measuring frame, the load frame and the soil tank to form the test platform, is convenient for test staff to study the interaction between the tires on the surface of the load frame and soil, and is matched with the load box with the movable and adjustable surface of the load frame, thereby being convenient for studying the load and the trafficability of the tires on different centers of gravity.

Description

A tire-soil interaction test platform

Technical field

The invention relates to the technical field of soil and tires, specifically a tire-soil interaction test platform.

Background technique

In addition to the effects of air resistance and gravity, the force and torque experienced by the vehicle come from the tires. Tires are the only ground-contacting parts of a vehicle, and the vehicle will interact with the ground when driving or working on the ground. Therefore, the study of the interaction between tires and the ground has important guiding significance for the evaluation of vehicle driving behavior and the impact of tires on the physical properties of the ground.

Since the soil has bulk medium characteristics and contains a large number of pores inside, when agricultural machinery travels on the soil, the soil particles will approach each other due to external loads and vibrations, resulting in subsidence, resulting in a reduction in porosity and an increase in bulk density. . Moreover, the serious compaction and damage of tires to the soil will cause the soil structure to change and be difficult to restore, causing the quality of cultivated land to decline, destroying crop growth conditions, and reducing crop yields; through in-depth research and analysis of the interaction between tires and soft soil , can predict soil stress changes and provide reference suggestions for reducing soil compaction and damage caused by agricultural machinery operations.

Currently, a tire finite element model is established in Zhao Yajun's tire-soil interaction research platform design and experiment, and the model is used to simulate the radial compression test and the optimal value of the elastic modulus of the tire carcass is obtained. The platform can be adjusted Realize different tire movement conditions, but this platform cannot change the slip rate during tire movement, making it difficult to study the tire-soil interaction. A tire-soil interaction test platform is proposed for this purpose.

Contents of the invention

(1) Technical problems solved

In view of the shortcomings of the existing technology, the present invention provides a tire-soil interaction test platform, which solves the following problems:

(2) Technical solutions

In order to achieve the above objectives, the present invention is realized through the following technical solutions: a tire-soil interaction test platform, including a soil tank tractor, a six-component force measuring frame, a load frame and a soil tank. The soil tank traction vehicle Both the truck and the load frame are located in the soil tank. A six-component force measuring frame is fixedly connected between the soil tank tractor and the load frame. The load frame includes a load box, a frame, tires, and a suspension frame. and a limiting frame. The upper surface of the frame is provided with a slidingly connected load box. The lower surface of the frame is provided with a rotationally connected tire. The front end of the frame is fixedly connected with a suspension frame. The frame The tail end of the limit frame is fixedly connected to the limit frame, and the end of the limit frame is fixedly connected to the limit wheel.

As a further preferred mode of the present invention, a sliding assembly is provided at the connection between the load box and the vehicle frame. The sliding assembly includes a support beam, a fixed plate and a pulley. The side walls of the support beam are fixedly connected with symmetrically distributed fixing members. The lower end of the fixed plate is fixedly connected with a pulley.

As a further preferred mode of the present invention, an embedding groove is provided at the lower edge of the fixed plate, and a central axis is rotatably connected to the center of the pulley. The central axis is embedded in the embedding groove and slides with the embedding groove. The two ends of the central shaft are respectively provided with threaded locking nuts.

As a further preferred mode of the present invention, a guide groove is provided at the edge of the frame, the pulley is embedded in the guide groove and is slidingly connected with the guide groove, a positioning groove is provided on the surface of the pulley, and the positioning groove is Snap-fitting connection with the inner wall of the guide groove.

As a further preferred mode of the present invention, a push block is fixedly connected to the bottom of the load box, a transverse threaded hole is provided in the center of the push block, and a wing plate is fixedly connected to an edge of the push block. A number of mounting holes are provided on the surface of the plate, and the mounting holes are provided with fixing bolts that penetrate the wing plate and are threadedly connected to the load box.

As a further preferred mode of the present invention, the inside of the frame is provided with a feed screw that is rotatably connected. The feed screw penetrates the push block and is rotatably connected with the threaded hole. The outer end of the feed screw is fixed. A handwheel is attached.

As a further preferred mode of the present invention, the vehicle frame and the tire are connected with an axle column, the side wall of the axle column is provided with a fixing hole, and the center of the tire is provided with a rotationally connected socket. The socket is embedded in the wheel axle column and plug-connected with the wheel axle column.

As a further preferred mode of the present invention, the inside of the soil tank is filled with soil, a traction platform is provided at the edge of the soil tank, and the soil tank tractor is located on the surface of the traction platform and is rollingly connected to the traction platform.

(3) Beneficial effects

The invention provides a tire-soil interaction test platform. It has the following beneficial effects:

1. The present invention uses a soil tank tractor, a six-component force measuring frame, a load frame and a soil tank to form a test platform. It is convenient to use the soil tank tractor to pull the load frame to move in the soil tank, and it is convenient for testers to measure the load. The interaction between the tires and the soil on the surface of the frame is studied, and the load box that can be moved and adjusted on the surface of the load frame is used to study the load and passability of the tires at different centers of gravity, and to facilitate the solution of tire passage of agricultural machinery in field transportation. Sexual issues.

2. The present invention facilitates the adjustment of the position of the load box on the surface of the frame by fixing the sliding assembly and the push block at the bottom of the load box, in conjunction with the guide grooves on both sides of the frame and the feed screws that are rotationally connected. , which facilitates changing the center of gravity of the load frame, thereby changing the sliding rate between the tire and the soil surface.

Description of the drawings

Figure 1 is a schematic structural diagram of the tire-soil interaction test platform of the present invention;

Figure 2 is a schematic structural diagram of the load frame of the present invention;

Figure 3 is a schematic structural diagram of the load box of the present invention viewed from above;

Figure 4 is a schematic structural diagram of the sliding assembly of the present invention;

Figure 5 is a schematic diagram of the connection structure between the limiting frame and the limiting wheel of the present invention.

In the picture: soil tank tractor-1, six-component force measuring frame-2, load frame-3, soil tank-4, load box-5, frame-6, tire-7, suspension frame-8, Limit frame-9, limit wheel-10, sliding component-11, support beam-12, fixed plate-13, pulley-14, embedded groove-15, central shaft-16, locking nut-17, guide groove -18, positioning slot-19, push block-20, threaded hole-21, wing plate-22, mounting hole-23, fixing bolt-24, feed screw-25, handwheel-26, wheel shaft column-27, Fixing hole-28, socket-29, soil-30, traction platform-31.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figures 1-5. The embodiment of the present invention provides a technical solution: a tire-soil interaction test platform, including a soil tank tractor 1, a six-component force measuring frame 2, a load frame 3 and a soil tank. 4. The soil tank tractor 1 and the load frame 3 are both located in the soil tank 4. A six-component force measuring frame 2 is fixedly connected between the soil tank tractor 1 and the load frame 3. The load The frame 3 includes a load box 5, a frame 6, tires 7, a suspension frame 8 and a limiting frame 9. The upper surface of the frame 6 is provided with a slidingly connected load box 5, and the lower surface of the frame 6 is provided with a load box 5. There is a rotationally connected tire 7. The front end of the frame 6 is fixedly connected to a suspension frame 8. The rear end of the frame 6 is fixedly connected to a limiter frame 9. The end of the limiter frame 9 is fixedly connected to a limiter wheel 10. .

In a further improvement, a sliding assembly 11 is provided at the connection between the load box 5 and the frame 6. The sliding assembly 11 includes a support beam 12, a fixed plate 13 and a pulley 14. The side walls of the support beam 12 are fixedly connected with The fixed plate 13 is symmetrically distributed. The lower end of the fixed plate 13 is fixedly connected with a pulley 14. By providing a sliding assembly 11 at the connection between the load box 5 and the frame 6, it is convenient to move the load box 5 along the surface of the frame 6. Adjust to change the center of gravity position on the surface of the frame 6 to facilitate changing the sliding rate of the tire 7 in motion.

In a further improvement, an embedding groove 15 is provided at the lower edge of the fixed plate 13, and a central shaft 16 is rotatably connected to the center of the pulley 14. The central shaft 16 is embedded in the embedding groove 15 and connected with the embedding groove. 15 sliding connection, the two ends of the central shaft 16 are respectively provided with threaded locking nuts 17, and an embedded groove 15 is provided at the lower edge of the fixed plate 13 to cooperate with the central shaft 16 provided in the center of the pulley 14 , to facilitate the disassembly and assembly of the pulley 14 and the connection between the pulley 14 and the fixed plate 13.

In a further improvement, a guide groove 18 is provided at the edge of the frame 6. The pulley 14 is embedded in the guide groove 18 and is slidingly connected to the guide groove 18. A positioning groove 19 is provided on the surface of the pulley 14, so The positioning groove 19 is snap-connected to the inner wall of the guide groove 18. The guide groove 18 is provided at the edge of the frame 6 and cooperates with the positioning groove 19 provided on the surface of the pulley 14 to improve the stability of the connection of the pulley 14 on the surface of the frame 6. .

In a further improvement, a push block 20 is fixedly connected to the bottom of the load box 5. A transverse threaded hole 21 is provided in the center of the push block 20. A wing plate 22 is fixedly connected to the edge of the push block 20, so A number of mounting holes 23 are provided on the surface of the wing plate 22. The mounting holes 23 are provided with fixing bolts 24 that penetrate the wing plate 22 and are threadedly connected to the load box 5. A threaded hole 21 is fixedly connected to the bottom of the load box 5. The push block 20 is convenient for moving the load box 5 forward and backward, thereby making it easy to change the center of gravity of the load box 5 on the surface of the frame 6, and the detachably connected push block 20 is more convenient for disassembly and assembly of the push block 20.

In a further improvement, the inside of the frame 6 is provided with a feed screw 25 that is rotationally connected. The feed screw 25 penetrates the push block 20 and is rotationally connected with the threaded hole 21. The outer surface of the feed screw 25 is A handwheel 26 is fixedly connected to the end, and a feed screw 25 connected to the push block 20 is provided inside the frame 6 to facilitate manual movement of the load box 5 and improve the convenience of operation.

Further improvement, the connection between the frame 6 and the tire 7 is provided with an axle column 27, the side wall of the axle column 27 is provided with a fixing hole 28, and the center of the tire 7 is provided with a rotationally connected socket 29. The plug socket 29 is embedded in the wheel axle column 27 and is plugged into the wheel axle column 27. The wheel axle column 27 is provided at the connection between the vehicle frame 6 and the tire 7, which facilitates the disassembly and assembly of the tire 7 and cooperates with the wheel axle column. The fixing holes 28 provided on the side wall of the tire 27 are convenient for raising and lowering the tire 7, and are convenient for free adjustment and operation during the test.

Specifically, the soil tank 4 is filled with soil 30, and a traction platform 31 is provided at the edge of the soil tank 4. The soil tank tractor 1 is located on the surface of the traction platform 31 and is rollingly connected to the traction platform 31. By providing soil 30 inside the soil tank 4, it is convenient to test and study the interaction between the tires 7 of the load frame 3 and the soil. By providing a traction platform 31 at the edge of the soil tank 4, the soil is ensured. The traction power of the trench tractor 1 is used to prevent the soil trench tractor 1 from affecting the test results.

During the test of the present invention, the soil tank tractor 1 is used to pull the load frame 3 through the six-component force measuring frame 2 to move in the soil tank 4, and the positions of the limit wheels 10 at both ends of the limit frame 9 are manually adjusted so that The limiting wheels 10 are respectively rollingly connected with the inner wall of the soil tank 4 to prevent the load frame 3 from deflecting during the movement, allowing the load frame 3 to move in a straight line and reducing the impact on the test results. During the test process, the load frame 3 is moved towards the load Different weight loads are added to the box 5 to facilitate testing and recording of the passability of the tire 7 on the soil surface under different loads; when adjusting the center of gravity position of the load frame 3, manually turn the handwheel 26 at the end of the feed screw, Thereby, the pushing block 20 is driven to move along the axial direction of the feed screw, and the pulley 14 rolls along the surface of the guide groove 18, which facilitates the adjustment of the load box 5 and improves the stability of the connection between the load box 5 and the frame 6.

The problem solved by this invention was to establish a tire finite element model in the design and experiment of Zhao Yajun's tire-soil interaction research platform, and use the model to simulate the radial compression test, and obtain the optimal value of the elastic modulus of the tire carcass, which The platform can be adjusted to realize different movement conditions of the tire, but the platform cannot change the slip rate during tire movement, making it difficult to study the interaction between the tire and the soil. The present invention uses a soil trench tractor 1. The force measuring frame 2, the load frame 3 and the soil tank 4 form a test platform. It is convenient to use the soil tank tractor 1 to pull the load frame 3 to move in the soil tank 4, and it is convenient for the test personnel to measure the surface tires 7 of the load frame 3. The interaction with the soil is studied, and the load box 5 that can be moved and adjusted on the surface of the load frame 3 is used to facilitate research on the load and passability of the tire 7 at different centers of gravity, and to facilitate the solution of the tire 7 passability during field transportation of agricultural machinery. Sexual issues.

In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top" ", "inner", "front", "center", "both ends", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore is not to be construed as a limitation of the invention.

Furthermore, the terms “first”, “second”, “third” and “fourth” are used for descriptive purposes only and shall not be understood as indicating or implying the relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined as "first", "second", "third", and "fourth" may explicitly or implicitly include at least one of these features.

In the present invention, unless otherwise expressly stipulated and limited, the terms "installation", "setting", "connection", "fixing", "screwing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a fixed connection. It can be detachably connected or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements. , unless otherwise explicitly limited, those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still The technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a tire-soil interaction test platform, includes soil groove tractor (1), six component force measurement frame (2), load frame (3) and soil groove (4), its characterized in that: soil groove tractor (1) and load frame (3) all are located soil groove (4), six component force measurement frame (2) of fixedly connected with between soil groove tractor (1) and load frame (3), load frame (3) are including load case (5), frame (6), tire (7), mounted frame (8) and spacing (9), the upper surface of frame (6) is equipped with sliding connection's load case (5), the lower surface of frame (6) is equipped with tire (7) of swivelling joint, the front end fixedly connected with mounted frame (8) of frame (6), afterbody fixedly connected with spacing (9) of frame (6), the tip fixedly connected with spacing (10) of spacing (9).

2. A tire-soil interaction test platform according to claim 1, wherein: the utility model discloses a load box, including load box (5), frame (6), load box, fixed plate (13) and pulley (14), the junction of load box (5) and frame (6) is equipped with slip subassembly (11), slip subassembly (11) include a supporting beam (12), the lateral wall fixedly connected with symmetric distribution's of supporting beam (12) fixed plate (13), the lower extreme fixedly connected with pulley (14) of fixed plate (13).

3. A tire-soil interaction test platform according to claim 2, wherein: the lower edge of fixed plate (13) has seted up embedded groove (15), the center of pulley (14) is equipped with center pin (16) of rotation connection, center pin (16) are embedded in embedded groove (15) and with the sliding connection of embedded groove (15), the both ends of center pin (16) are equipped with lock nut (17) of threaded connection respectively.

4. A tire-soil interaction test platform according to claim 3, wherein: the edge of frame (6) has seted up guide way (18), pulley (14) are embedded in guide way (18) and with guide way (18) sliding connection, constant head tank (19) have been seted up on the surface of pulley (14), constant head tank (19) are connected with guide way (18) inner wall lock.

5. A tire-soil interaction test platform according to claim 1, wherein: the bottom fixedly connected with of load case (5) promotes piece (20), transversely run through screw hole (21) have been seted up at the center of promoting piece (20), the edge fixedly connected with pterygoid lamina (22) of promoting piece (20), a plurality of mounting holes (23) have been seted up on the surface of pterygoid lamina (22), mounting hole (23) are equipped with and run through pterygoid lamina (22) and with load case (5) threaded connection's fixing bolt (24).

6. A tire-soil interaction test platform according to claim 5, wherein: the inside of frame (6) is equipped with feed screw (25) of swivelling joint, feed screw (25) run through pushing block (20) and with screw hole (21) swivelling joint, the outer end fixedly connected with hand wheel (26) of feed screw (25).

7. A tire-soil interaction test platform according to claim 1, wherein: the bicycle is characterized in that an axle stand column (27) is arranged between the bicycle frame (6) and the tire (7), a fixing hole (28) is formed in the side wall of the axle stand column (27), a plug seat (29) which is connected in a rotating mode is arranged in the center of the tire (7), and the plug seat (29) is embedded in the axle stand column (27) and is connected with the axle stand column (27) in a plug mode.

8. A tire-soil interaction test platform according to claim 1, wherein: the soil tank is characterized in that soil (30) is filled in the soil tank (4), a traction table (31) is arranged at the edge of the soil tank (4), and the soil tank tractor (1) is located on the surface of the traction table (31) and is in rolling connection with the traction table (31).