Self-adaptive crawler chassis device for seedling self-transportation

Abstract

The invention provides a self-adaptive crawler chassis device for seedling self-transportation. The self-adaptive crawler chassis device comprises a fixed beam, a sliding beam, a main crawler and a multifunctional crawler, the main tracks are installed on the two sides of the fixed beam respectively, and the multifunctional track is installed on the outer sides of the driving gear and the three track carrier rollers. Telescopic sliding of the sliding beam can be achieved through the pneumatic push rod, the multifunctional crawler belt is further connected, the multifunctional crawler belt is lowered to make contact with the ground during use to achieve the effects of assisting advancing and improving the stability of the vehicle body, and extra pushing force is provided at the rear end of the vehicle body; when not in use, the multifunctional crawler belt can be hung between the fixed beams, the multifunctional crawler belt is in a folded state, when the multifunctional crawler belt is in the folded state, the limiting blocks bounce to complete locking of the sliding beams, the sliding beams continue to retract in the fixed beams to lift the multifunctional crawler belt, and the multifunctional crawler belt is in a lifted state. The device can play a role in auxiliary feeding, facilitates timely adjustment under different working conditions, is high in adaptability, and is efficient and convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of crawler chassis devices, and in particular relates to an adaptive crawler chassis device for self-transportation of seedlings. Background Art

[0002] In recent years, the task of new afforestation of economic forests has continued to increase, but currently most of the characteristic economic forests are afforested in difficult areas of mountains and hills, with poor site conditions, diverse soil structure, thin soil and complex working environment. Afforestation operations such as land preparation, seedling removal, hole digging, seedling transportation and planting still rely on a large amount of manpower, with high costs and low operating efficiency. Afforestation is mainly divided into three links: seedling removal, hole digging and seedling planting. According to the tools used, it is divided into artificial afforestation and mechanical afforestation. Among them, artificial afforestation is mainly done by people, using tools such as shovels, pickaxes and hoes, with high labor intensity and low efficiency.

[0003] The existing seedling lifting mechanism basically adopts the method of adding a vehicle-mounted crane arm or a gantry crane to a tractor or truck. The addition of a crane arm increases the weight of the vehicle body and also increases the instability of the vehicle's driving. If the crane arm is not installed, the process of loading, unloading and feeding the seedlings requires a large amount of labor, which increases the labor burden of the workers. However, it is only for seedling loading and unloading vehicles, and it is impossible to enter the forest land to transport the dug seedlings out or transport the unloaded seedlings to the afforestation site. The crawler walking mechanism has good traction and adhesion performance, strong adaptability to harsh ground conditions, good passability and low soil compaction, and is widely used in various types of engineering machinery and agricultural machinery. Domestic transportation machinery used for hilly and mountainous areas mainly includes: wheeled conveyors, crawler conveyors, tracked conveyors, rotary traction conveyors, etc.

[0004] Compared with traditional conveyor belts such as belts and chain plates, crawler conveyor belts can play a role in assisting travel. At the same time, crawler belts have the advantages of stable transmission ratio, small deformation caused by long-term use, and strong resistance to harsh working environments. At present, the loading, unloading and feeding of forest resources are carried out by gantry crane lifting and manual handling. The former is difficult to operate, costly, and will greatly increase the overall mass of the vehicle and increase the danger during vehicle driving, while the latter has high labor intensity, low labor efficiency, and requires a large amount of labor. The existing crawler mountain working machine adopts a series of two-stage leveling mechanism. The upper and lower stages use two hydraulic cylinders to achieve horizontal and vertical leveling respectively. The stability is poor, the vibration is obvious, the final leveling effect is poor, and the height of the center of gravity is high, which increases the possibility of tipping during forest operations. And the hydraulic system is adopted. The hydraulic control system is powered by an electric motor and uses a hydraulic pump to convert mechanical energy into pressure to push the hydraulic oil. By controlling various valves, the flow direction of the hydraulic oil is changed, thereby pushing the hydraulic cylinder to make movements with different strokes and directions to complete the different action requirements of various equipment. It is often complex in structure and slow in action.

[0005] Based on this, an adaptive crawler chassis device for self-transportation of seedlings is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an adaptive crawler chassis device for self-transportation of seedlings in view of the deficiencies of the above-mentioned prior art, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: an adaptive crawler chassis device for self-transportation of seedlings, comprising a fixed beam, a sliding beam, a main crawler and a multifunctional crawler;

[0008] Main crawlers are installed on both sides of the fixed beam respectively, two sliding beams are slidably connected in the fixed beam near the tail end, a connecting plate is fixed between the two sliding beams, and a pneumatic push rod is also installed in the middle of the fixed beam, and the telescopic shaft of the pneumatic push rod is rotatably connected to the connecting plate;

[0009] An extension frame is fixed on the bottom side of the fixed beam near the tail end, and a driving gear is installed on the bottom end of the extension frame. A connecting seat is also fixed on the sliding beam near the side of the extension frame, and a roller frame is rotatably connected to the outer side of the connecting seat. Three track rollers are rotatably installed on the roller frame at equal intervals, and the multifunctional crawler is installed on the outer side of the driving gear and the three track rollers.

[0010] As a further explanation of the present invention, a swivel rod is rotatably mounted on the roller frame at a position corresponding to the middle track roller connecting shaft, and the other end of the swivel rod is rotatably mounted on the rotating shaft of the driving gear.

[0011] As a further illustration of the present invention, the length of the rotating rod is greater than the length of the extension frame.

[0012] As a further illustration of the present invention, a hydraulic motor is mounted on the bottom end of the extension frame via a hydraulic motor mounting frame, and a driving gear is mounted on the output shaft of the hydraulic motor.

[0013] As a further illustration of the present invention, a limiting frame is also installed in the fixed beam, and the pneumatic push rod is slidably connected in the limiting mechanism.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The present invention is characterized in that main crawlers are respectively installed on both sides of a fixed beam, two sliding beams are slidably connected in the fixed beam near the tail end, a connecting plate is fixed between the two sliding beams, the connecting plate can be driven to move by a pneumatic push rod, and then the sliding beam can be driven to slide in the fixed beam by the movement of the connecting plate, a hydraulic motor is installed at the bottom end of the extension frame of the fixed beam through a hydraulic motor mounting frame, a driving gear is installed on the output shaft of the hydraulic motor, a connecting seat is also fixed on the sliding beam near one side of the extension frame, the connecting seat moves synchronously with the sliding beam, the multifunctional crawler is installed on the outside of the driving gear and three crawler rollers, the functional crawler wheel system is simple to use, has a small mass, and a low center of gravity, which can not only improve the stability during driving, but also reduce the labor burden of workers and improve labor efficiency, when the connecting seat is driven to move by the action of the connecting plate and the sliding beam, the relative position of the connecting seat and the bottom end of the extension frame changes, thereby driving the inclination angle of the rotating rod to change, that is, the rotating rod rotates with the rotating shaft of the driving gear as the center when the position of the connecting seat changes, thereby changing the spatial state of the multifunctional crawler, and facilitating the adaptive adjustment of the chassis.

[0016] 2. When the present invention is used, the multifunctional crawler is lowered to contact the ground to assist in traveling and increase the stability of the vehicle body, and provide additional driving force at the rear end of the vehicle body; when the fixed beam is stationary and working, the multifunctional crawler is lowered to be used as a crawler conveyor belt to assist in transportation, effectively improving working efficiency and reducing labor burden; when the multifunctional crawler is in the lowered state, the position of the sliding beam in the fixed beam is not limited, and the sliding beam can adaptively adjust the extended length according to the contact terrain of the multifunctional crawler. When it is not needed, the multifunctional crawler can be suspended between the fixed beams by retracting the fixed beam and the sliding beam, and the multifunctional crawler is in the retracted state. A limiting block is also installed in the sliding beam. When the multifunctional crawler is in the retracted state, the limiting block pops up and clamps the fixed beam and the sliding beam respectively, completing the locking of the sliding beam. The sliding beam continues to retract in the fixed beam to lift the multifunctional crawler, so that the multifunctional crawler is in the lifted state, forming an upwardly moving slope conveyor belt, which can assist in loading, facilitate timely adjustment under different working conditions, and has strong adaptability, high efficiency and convenience.

[0017] 3. The fixed beam and the sliding beam in the present invention are driven by a pneumatic push rod, which uses compressed air as a power source to drive the machine to complete the telescopic action. It has a simple structure and low cost. The operating speed can be adjusted at any time by adjusting the gas pressure. In an emergency, the sliding beam can be ejected at high speed, and the air can be quickly discharged when an overload occurs, thereby reducing the risk of damage to important components and reducing the time the vehicle is stranded due to overload and other problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the overall structure of the present invention;

[0019] Figure 2 It is an enlarged view of the multifunctional crawler installation structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the installation of the multifunctional crawler of the present invention;

[0021] Figure 4 It is a schematic diagram of the overall use state of the present invention;

[0022] Figure 5 It is another schematic diagram of the overall use state of the present invention.

[0023] Description of reference numerals:

[0024] 1-fixed beam; 11-extension frame; 12-pneumatic push rod; 13-limiting frame; 2-sliding beam; 21-connecting plate; 22-limiting block; 3-main crawler; 4-multi-function crawler; 41-hydraulic motor; 411-hydraulic motor mounting frame; 42-driving gear; 43-connecting seat; 44-roller frame; 45-track roller; 46-swivel rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1-5 As shown, the present invention provides a technical solution: an adaptive crawler chassis device for self-transportation of seedlings, comprising a fixed beam 1, a sliding beam 2, a main crawler 3 and a multifunctional crawler 4;

[0027] Main crawlers 3 are respectively installed on both sides of the fixed beam 1, and the main crawlers 3 are used for main driving operations. The spacing between the fixed beams 1 and the width of the main crawlers 3 can be selected from the following size combinations according to the size range of the soil ball of the transported seedlings: 0.5m / 0.3m, 1m / 0.8m, 2m / 1.8m.

[0028] Two sliding beams 2 are slidably connected near the tail end of the fixed beam 1, a connecting plate 21 is fixed between the two sliding beams 2, a pneumatic push rod 12 is also installed in the middle of the fixed beam 1, and a limiting frame 13 is also installed in the fixed beam 1. The pneumatic push rod 12 is slidably connected in the limiting mechanism 13, and the telescopic shaft of the pneumatic push rod 12 is rotatably connected to the connecting plate 21. The pneumatic push rod 12 can drive the movement of the connecting plate 21, and then the movement of the connecting plate 21 can drive the sliding beam 2 to slide in the fixed beam 1.

[0029] An extension frame 11 is fixed to the bottom side of the fixed beam 1 near the tail end, and a hydraulic motor 41 is installed on the bottom end of the extension frame 11 through a hydraulic motor mounting frame 411. A driving gear 42 is installed on the output shaft of the hydraulic motor 41. A connecting seat 43 is also fixed to the sliding beam 2 near the side of the extension frame 11. The connecting seat 43 moves synchronously with the sliding beam 2, that is, while the pneumatic push rod 12 drives the connecting plate 21 to move, the connecting seat 43 can be driven to move through the action of the connecting plate 21 and the sliding beam 2.

[0030] The outer side of the connecting seat 43 is rotatably connected to a roller frame 44, and three track rollers 45 are rotatably installed on the roller frame 44 at equal intervals. The multifunctional crawler 4 is installed on the outer side of the driving gear 42 and the three track rollers 45. The driving gear 42 is driven by a hydraulic motor 41 to provide power for the multifunctional crawler 4.

[0031] A swivel rod 46 is rotatably mounted on the roller frame 44 at a position corresponding to the connecting shaft of the middle crawler roller 45. The length of the swivel rod 46 is greater than the length of the extension frame 11. The other end of the swivel rod 46 is rotatably mounted on the rotating shaft of the driving gear 42. When the connecting seat 43 is driven to move through the action of the connecting plate 21 and the sliding beam 2, the relative position of the connecting seat 43 and the bottom end of the extension frame 11 changes, thereby causing the inclination angle of the swivel rod 46 to change, that is, when the position of the connecting seat 43 changes, the swivel rod 46 rotates with the rotating shaft of the driving gear 42 as the center, thereby changing the spatial state of the multifunctional crawler 4, specifically as follows Figure 1 and Figure 3 The lowered state shown is the first posture. Figure 4 The stowed state shown is the second posture. Figure 5 The lifted state shown is the third posture.

[0032] The multifunctional track 4 forms a plane on the three track rollers 45, that is, when the multifunctional track 4 on the three track rollers 45 is in the first posture to assist the vehicle to move forward, it can be adaptively adjusted between 30-60° according to the terrain, and when the vehicle is stationary to assist in loading and lifting seedlings, a 30° loading and transportation surface can be formed. According to the mechanical performance analysis, assisted loading can be more efficient and labor-saving.

[0033] The multifunctional crawler 4 is arranged in a triangular shape as a whole. The angle of the end angle close to the connecting seat 43 is adjusted between 79 and 97 degrees, the angle of the end angle corresponding to the connection with the driving gear 42 is adjusted between 58 and 64 degrees, and the angle of the other end angle is adjusted between 25 and 37 degrees. Through this angle adjustment layout, the multifunctional crawler 4 can be protected to the maximum extent and the service life of the multifunctional crawler 4 can be extended.

[0034] When in use, when the sliding beam 2 is extended in the fixed beam 1, the multifunctional crawler 4 is lowered to contact the ground, which can assist in traveling and increase the stability of the vehicle body, and provide additional propulsion at the rear end of the vehicle body;

[0035] When the fixed beam 1 is stationary and working, the multifunctional crawler 4 can be lowered and used as a crawler conveyor belt to assist in transportation, thereby effectively improving the working efficiency and reducing the labor burden;

[0036] Moreover, when the multifunctional crawler 4 is in the lowered state, the position of the sliding beam 2 in the fixed beam 1 is not limited, and the sliding beam 2 can adaptively adjust the extension length according to the contact terrain of the multifunctional crawler 4.

[0037] When not in use, the multifunctional crawler 4 can be suspended between the fixed beam 1 by retracting the fixed beam 1 and the sliding beam 2. The multifunctional crawler 4 is in a retracted state. A limit block 22 is also installed in the sliding beam 2. The limit block 22 is a triangular protrusion connected by a reset spring installed in the sliding beam 1. When the multifunctional crawler 4 is in the retracted state, the limit block 22 pops up under the action of the reset spring to clamp the fixed beam 1 and the sliding beam 2, thereby locking the sliding beam 2 and facilitating the storage of the multifunctional crawler 4.

[0038] The sliding beam 2 continues to retract in the fixed beam 1 until the connecting plate 21 is close to the limit mechanism 13. At this time, the limit block 22 is compressed and retracted, which can lift the multifunctional crawler 4 so that the multifunctional crawler 4 is in an upward state, that is, the third posture, forming an upwardly moving slope conveyor belt, which can play a role in assisting material loading, facilitates timely adjustment under different working conditions, has strong adaptability, and is efficient and convenient.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adaptive crawler chassis device for self-transportation of seedlings, characterized in that: It comprises a fixed beam (1), a sliding beam (2), a main crawler (3) and a multifunctional crawler (4); Main crawlers (3) are respectively installed on both sides of the fixed beam (1); two sliding beams (2) are slidably connected to the fixed beam (1) near the rear end; a connecting plate (21) is fixed between the two sliding beams (2); a pneumatic push rod (12) is also installed in the middle of the fixed beam (1); and the telescopic shaft of the pneumatic push rod (12) is rotatably connected to the connecting plate (21); An extension frame (11) is fixed to the bottom side of the fixed beam (1) near the tail end, and a driving gear (42) is installed at the bottom end of the extension frame (11). A connecting seat (43) is also fixed to the sliding beam (2) near the side of the extension frame (11), and a roller frame (44) is rotatably connected to the outer side of the connecting seat (43). Three crawler rollers (45) are rotatably installed on the roller frame (44) at equal intervals, and the multifunctional crawler (4) is installed on the outer side of the driving gear (42) and the three crawler rollers (45).

2. The adaptive crawler chassis device for self-transportation of seedlings according to claim 1, characterized in that: A rotating rod (46) is rotatably mounted on the roller frame (44) at a position corresponding to the connecting shaft of the middle crawler roller (45), and the other end of the rotating rod (46) is rotatably mounted on the rotating shaft of the driving gear (42).

3. The adaptive crawler chassis device for self-transportation of seedlings according to claim 2, characterized in that: The length of the rotating rod (46) is greater than the length of the extension frame (11).

4. The adaptive crawler chassis device for self-transportation of seedlings according to claim 1, characterized in that: A hydraulic motor (41) is mounted on the bottom end of the extension frame (11) via a hydraulic motor mounting frame (411), and a driving gear (42) is mounted on the output shaft of the hydraulic motor (41).

5. The adaptive crawler chassis device for self-transportation of seedlings according to claim 1, characterized in that: A limiting frame (13) is also installed in the fixed beam (1), and the pneumatic push rod (12) is slidably connected in the limiting mechanism (13).

6. The adaptive crawler chassis device for self-transportation of seedlings according to claim 1, characterized in that: A limiting block (22) is also installed in the sliding beam (2).

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