Tractor wheel-track interchangeable power chassis

Abstract

The invention relates to a tractor wheel-track interchange power chassis, which belongs to the technical field of agricultural machinery, and is characterized in that a power system of the power chassis is preposed, a wheel-track articulated steering transmission system is adopted, the steering is small, the steering is flexible, an external external meshing tail end assembly with vertical height difference arrangement is arranged, the ground clearance is high, and the wheel-track interchange installation condition is met. The crawler walking mechanism is a triangular crawler assembly tensioned in the single direction, a driving wheel adopts a gear with a large pitch diameter, the crawler walking mechanism is matched with the vehicle speed, a swing structure is designed, the crawler walking mechanism adapts to complex terrains, the power chassis can achieve interchange of the wheel type walking mechanism and the crawler walking mechanism, and the crawler walking mechanism adapts to complex operation conditions of hills and mountains. And the development process of agricultural planting and harvesting mechanization can be promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and in particular to a tractor wheel-track interchangeable power chassis. Background Art

[0002] Domestic tobacco cultivation is mostly concentrated in hilly and mountainous areas. However, the hilly and mountainous areas have high mountains and steep slopes, and arable land is scattered. In addition, tobacco cultivation involves multiple links such as plowing, rotary tillage, humping, pond digging, fertilizing, mulching, transplanting, watering, plant protection, film removal, pole shifting, and transportation. The operating conditions are complex and a wide variety of operating machinery is required.

[0003] The running mechanisms of ordinary tractors currently on the market are either wheeled or crawler-type. Wheeled tractors have a fast operating speed and are suitable for flat land. They are prone to slipping and have poor stability when operating in hilly and mountainous areas. Crawler tractors have large driving force and low ground contact pressure. Although they have strong passability, they lack steering flexibility. The chassis of ordinary tractors with a single running mechanism cannot be compatible with the requirements of anti-skid operation on slopes and efficient operation on flat land. They are difficult to apply to different operating scenarios of tobacco planting and cannot meet the needs of full-process mechanization of tobacco planting in hilly areas, resulting in "no machines available" and "no good machines to use".

[0004] In order to solve the problem of full mechanization of tobacco production in hilly and mountainous areas, lack of available power chassis and no good machines to use, creating a power chassis that can adapt to the complex conditions of hilly and mountainous areas is an inevitable choice to accelerate the development of mechanization of transplanting and harvesting of tobacco production in hilly and mountainous areas. Summary of the Invention

[0005] In response to the defects of the existing technology, the present invention provides a tractor wheel-track interchangeable power chassis, which realizes the interchange of the tractor crawler traveling mechanism and the wheeled traveling mechanism. It can be applied to different operation scenarios of tobacco planting and meet the needs of full-process mechanization of tobacco planting in hilly areas.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A tractor wheel-track interchangeable power chassis comprises a power system, a transmission system and a running mechanism, wherein the transmission system is a wheel-track folding and steering transmission system, the power system is mounted at the front of the wheel-track folding and steering transmission system, the running mechanism is mounted on the terminal assemblies at the front and rear sides of the wheel-track folding and steering transmission system, the running mechanism is a crawler running mechanism or a wheeled running mechanism, and the wheel-track interchangeability is achieved by configuring the wheeled running mechanism or the crawler running mechanism on the power chassis.

[0007] Furthermore, the wheel-track folding steering transmission system includes a clutch assembly, a front box, a folding steering assembly, a gearbox, a brake assembly and a terminal assembly. The front box and the gearbox are hingedly connected by a pin shaft; the upper and lower shaft heads between the front box and the gearbox are respectively equipped with an upper cross-axis universal joint and a lower cross-axis universal joint, and the folding steering assembly is connected between the front box and the gearbox; the brake assembly is installed between the gearbox and the left rear terminal assembly, the clutch assembly is connected between the power system and the front box, and the terminal assembly is respectively installed on the left and right sides of the front box and the gearbox and connected to the drive shaft.

[0008] Furthermore, the terminal assembly is an external external meshing structure with an upper and lower height difference arrangement, including a left rear terminal assembly, a left front terminal assembly, a right front terminal assembly and a right rear terminal assembly; the right front terminal assembly and the left rear terminal assembly have the same structure, and the left front terminal assembly and the right rear terminal assembly have the same structure; the left front terminal assembly and the right front terminal assembly are respectively installed on the left and right sides of the front box and their structures are symmetrical on the left and right, and the left rear terminal assembly and the right rear terminal assembly are respectively installed on the left and right sides of the gearbox.

[0009] The left rear terminal assembly includes a terminal housing, a terminal front end gear, a terminal rear end gear, a terminal output shaft and a terminal cover. The terminal housing is installed on the outside of the brake assembly. The terminal front end gear is installed on the terminal housing and connected to the drive shaft. The terminal rear end gear is engaged with the terminal front end gear and is located below the side of the terminal front end gear. There is a height difference H between the two. The terminal output shaft is fixed on the terminal rear end gear and is used to install and drive the walking mechanism. The terminal cover is installed on the terminal housing to protect internal components. A suspension mounting interface is provided under the terminal housing.

[0010] Furthermore, the crawler walking mechanism is a triangular crawler assembly, which includes a rubber crawler track, a driving wheel, a fixed tensioning wheel, a telescopic tensioning wheel, a track frame, an anti-slip rod and a supporting roller. The driving wheel is installed on the terminal assembly of the wheel-track bending and steering transmission system, the track frame is located below the driving wheel, and the track frame is connected to the bottom of the terminal assembly through a swinging structure. The fixed tensioning wheel and the telescopic tensioning wheel are installed at the front and rear ends of the track frame, and the supporting roller and the anti-slip rod are installed below the track frame. The driving wheel, the fixed tensioning wheel and the telescopic tensioning wheel are arranged in a triangle, and the rubber crawler is arranged on the periphery of the driving wheel, the telescopic tensioning wheel, the supporting roller and the fixed tensioning wheel.

[0011] Furthermore, the swing structure includes an end connecting support, a frame connecting support and a pin welded part. The frame connecting support is connected above the crawler frame, and the end connecting support is connected below the end assembly of the wheel-track bending and steering transmission system. The end connecting support and the frame connecting support are pin-connected through a pin welded part. The bottom of the end connecting support and the top of the frame connecting support are provided with mutually cooperating bosses A and bosses B, which are used to limit the swing angle of the frame connecting support around the end connecting support through the pin welded part.

[0012] Furthermore, the rubber crawler track is a gear-type crawler track, and the driving wheel is a gear with a large pitch diameter.

[0013] Furthermore, the track frame is mainly welded by rectangular tube 1, rectangular tube 2, round tube and multiple steel plates. Rectangular tube 3 is welded on the support of the telescopic tensioning wheel and is inserted into the rectangular tube 1 of the track frame to achieve forward and backward movement. The unidirectional tensioning of the telescopic tensioning wheel is achieved by the track tensioning bolts installed on the track frame.

[0014] Furthermore, a scraper is installed on the support of the telescopic tensioning wheel, and the mounting hole on the scraper is an oblong hole, and the mounting position can be adjusted.

[0015] Furthermore, the front and rear output rotation speeds of the wheel-bending steering transmission system are the same, and the wheeled walking mechanism is composed of four wheel assemblies of the same size.

[0016] Beneficial effects The wheel-track interchangeable power chassis of the tractor of the present invention can realize the interchange between the tractor crawler traveling mechanism and the wheeled traveling mechanism. The power system is front-mounted, and the power chassis adopts a bent-waist steering transmission system with a small turning circle. The high-ground clearance terminal assembly is designed with a high ground clearance to meet the installation conditions for wheel-track interchange and adapt to complex terrain. The wide crawler structure is adopted with a low ground contact pressure, which can adapt to complex terrain and agronomic requirements and meet the operational needs of tobacco planting in hilly and mountainous areas.

[0017] The present invention designs a matching triangular crawler track assembly for the tractor wheel-track interchangeable power chassis, which has high passability, speed matching, and highly flexible steering. It adopts gears with a large pitch circle diameter to match the vehicle speed and meet the speed requirements of wheel-track interchange; the swing structure is designed to improve the passability of the entire triangular crawler track assembly and can adapt to complex terrain; the tensioning wheel adopts unidirectional forward or backward tensioning to meet the steering conditions of bending and turning.

[0018] The tractor wheel-track interchangeable power chassis of the present invention has made breakthroughs in key technologies such as high-slope high-passability walking mechanism technology, universal and speed matching technology of power chassis wheels and tracks in hilly and mountainous areas, high-flexibility steering technology, and integrated creation of a power chassis specifically for hilly and mountainous areas. It solves the problem of rapid wheel-track interchange and adaptation of the power system, improves the adaptability of agricultural power equipment in hilly and mountainous areas, and is conducive to accelerating the development of mechanized tobacco production, transplanting, and harvesting in hilly and mountainous areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the crawler walking mechanism configured on the wheel-track interchangeable power chassis of the tractor of the present invention.

[0020] Figure 2 This is a schematic diagram of the wheel-type traveling mechanism configured on the wheel-track interchangeable power chassis of the tractor according to the present invention.

[0021] Figure 3 The figure is a schematic structural diagram of the wheel-track bending and steering transmission system of the wheel-track interchangeable power chassis of the tractor according to the present invention.

[0022] Figure 4 The figure is a schematic structural diagram of the high-ground-clearance terminal assembly of the tractor wheel-track interchangeable power chassis according to the present invention.

[0023] Figure 5 The figure is a schematic structural diagram of the crawler walking mechanism of the tractor with interchangeable wheels and tracks according to the present invention.

[0024] Figure 6 This is a schematic diagram of the crawler walking mechanism of the high-ground-clearance terminal assembly of the tractor's wheel-track interchangeable power chassis of the present invention.

[0025] Figure 7 It is a schematic diagram of the swing structure of the triangular crawler assembly of the present invention.

[0026] Figure 8 It is a schematic diagram of the crawler frame structure of the triangular crawler assembly of the present invention.

[0027] Figures: 1 Power system, 2 Wheel assembly, 3 Wheel track folding steering transmission system, 4 Triangular track assembly; 3.1 Left rear terminal assembly, 3.2 Braking assembly, 3.3 Gearbox, 3.4 Folding steering assembly, 3.5 Front box, 3.6 Clutch assembly, 3.7 Left front terminal assembly, Lower cross shaft universal joint 3.8, Upper cross shaft universal joint 3.9; 3.1.1 Terminal cover, 3.1.2 Terminal front end gear, 3.1.3 Terminal housing, 3.1.4 Terminal rear end gear, 3.1.5 Terminal output shaft, 3.1.6 Suspension mounting interface; 4.1 Rubber track, 4.2 Drive wheel , 4.3 end connecting support, 4.4 pin welding parts, 4.5 frame connecting support, 4.6 fixed tensioner, 4.7 track frame, 4.8 anti-slip rod, 4.9 supporting wheel, 4.3.1 boss A, 4.5.1 boss B, 4.10 telescopic tensioner, 4.11 scraper, 4.12 track tensioning bolt; 4.7.1 steel plate one, 4.7.2 perforated steel plate two, 4.7.3 rectangular tube one, 4.7.4 perforated steel plate three, 4.7.5 round tube, 4.7.6 rectangular tube two, 4.7.7 steel plate four, 4.10.1 rectangular steel tube three, 4.10.2 top plate. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] A tractor wheel-track interchangeable power chassis of the present invention comprises a power system 1, a wheel-track folding and steering transmission system 3, and a traveling mechanism; the power system 1 is mounted on the front of the wheel-track folding and steering transmission system 3 by bolts, and the traveling mechanism is mounted on the front and rear sides of the wheel-track folding and steering transmission system 3, and the traveling mechanism is a crawler traveling mechanism or a wheeled traveling mechanism. Wheel-track interchangeability is achieved by configuring different traveling mechanisms on the power chassis.

[0030] like Figure 1 As shown, when the tractor wheel-track interchangeable power chassis is configured with a crawler walking mechanism, it includes a power system 1, a triangular crawler track assembly 4, and a wheel-track bending and steering transmission system 3; the power system 1 is installed in front of the wheel-track bending and steering transmission system 3 by bolts, and four triangular crawler track assemblies 4 are installed on both sides of the front and rear of the wheel-track bending and steering transmission system 3 by bolts; Figure 2 As shown, when the wheel-track interchangeable power chassis of the tractor is configured with a wheeled traveling mechanism, it includes a power system 1, a wheel-track folding and steering transmission system 3 and a wheel assembly 2; the installation position of the wheel assembly 2 is the same as that of the triangular crawler assembly 4, and both are installed on the front and rear sides of the wheel-track folding and steering transmission system 3 by bolts; the difference between the wheeled power chassis and the crawler power chassis is that the wheel-track interchange is achieved by configuring different traveling mechanisms.

[0031] like Figure 3 As shown, the wheel-track bending and steering transmission system 3 includes: a brake assembly 3.2, a gearbox 3.3, a bending and steering assembly 3.4, a front box 3.5, a clutch assembly 3.6, an upper cross shaft universal joint 3.9, a lower cross shaft universal joint 3.8 and a terminal assembly; wherein, the front box 3.5 and the gearbox 3.3 are hingedly connected by a pin shaft, the upper cross shaft universal joint 3.7 and the lower cross shaft universal joint 3.8 are sleeved on the upper and lower shaft heads between the front box 3.5 and the gearbox 3.3, the bending and steering assembly 3.4 is connected to the front box 3.5 and the gearbox 3.3, and the clutch assembly 3.6 is connected to the power There are four terminal assemblies between system 1 and the front box 3.5, namely the right front terminal assembly (not marked in the figure), the left rear terminal assembly 3.1, the left front terminal assembly 3.7 and the right rear terminal assembly (not marked in the figure); the left front terminal assembly 3.7 is installed on the left front of the front box 3.5 by bolts, the right front terminal assembly is installed on the right front of the front box 3.5 by bolts, the right rear terminal assembly is installed on the right rear of the gearbox 3.3 by bolts, the left rear terminal assembly 3.1 is installed on the left rear of the gearbox 3.3 by bolts, and the brake assembly 3.2 is installed between the gearbox 3.3 and the left rear terminal assembly 3.1.

[0032] The power system 1 of the present invention is installed at the front end of the wheel-track folding steering transmission system 3. The hinge point of the folding steering is located in front of the gearbox 3.3. The power is transmitted to the gearbox 3.3 through the upper cross-axis universal joint 3.9. After the speed change, it is transmitted back to the front box 3.5 through the lower cross-axis universal joint 3.8 to supply the front driving force. The power is then output to the walking mechanism through the front box 3.5 and the terminal assembly on the outside of the gearbox 3.3, realizing the power output of the entire chassis; the front and rear output speeds of the power chassis are the same, and can match four identical wheeled walking mechanisms or crawler walking mechanisms to ensure interchangeability.

[0033] The terminal assembly of the present invention is designed as an external external engagement form with an upper and lower height difference. The right front terminal assembly and the left rear terminal assembly 3.1 have the same structure, the right rear terminal assembly and the left front terminal assembly 3.7 have the same structure, and the corresponding structures of the left front terminal assembly 3.7 and the left rear terminal assembly 3.1 are reversed in front and back positions, and the rest are the same.

[0034] like Figure 4 As shown, taking the left rear terminal assembly 3.1 as an example (the terminal cover 3.1.1 is partially cut away in the figure to clearly show the internal structure), it includes: a terminal housing 3.1.3, a terminal front end gear 3.1.2, a terminal rear end gear 3.1.4, a terminal output shaft 3.1.5, and a terminal cover 3.1.1; since a brake assembly 3.2 is provided at the left rear of the steering transmission system 3, the terminal housing 3.1.3 of the left rear terminal assembly 3.1 is mounted on the outside of the brake assembly 3.2 by bolts (for terminal assemblies in other positions, the terminal housing 3.1.3 is directly mounted on the outside of the front box 3.5 or the gearbox 3.3), and the terminal front end gear 3.1.2, the terminal rear end gear 3.1.4, the terminal output shaft 3.1.5, and the terminal cover 3.1.1 are sequentially mounted on the terminal housing 3.1. .3; wherein, the terminal front end gear 3.1.2 is installed on the terminal housing 3.1.3 and is connected with the drive shaft (the terminal assembly is located on the rear side, the terminal front end gear 3.1.2 is connected with the drive shaft of the gearbox 3.3, and the terminal assembly is located on the front side, the terminal front end gear 3.1.2 is connected with the drive shaft of the front box 3.5), the terminal rear end gear 3.1.4 is engaged with the terminal front end gear 3.1.2 and is located on the side and below of the terminal front end gear 3.1.2, with a height difference H between the two, the terminal output shaft 3.1.5 is fixed on the terminal rear end gear 3.1.4, and is used to install and drive the corresponding walking mechanism, the terminal cover 3.1.1 is installed on the terminal housing 3.1.3 to protect the internal components, and a suspension mounting interface 3.1.6 is also provided under the terminal housing 3.1.3 for connecting the crawler walking mechanism.

[0035] Due to the height difference H between the front end gear 3.1.2 and the rear end gear 3.1.4, the ground clearance height of the whole machine can be increased by H, thereby increasing the passability of the whole machine. The high ground clearance feature of the terminal assembly enables the power chassis to meet the requirements of wheel-track interchangeability.

[0036] like Figure 5-6 As shown, the triangular track assembly 4 includes: a rubber track 4.1, a driving wheel 4.2, an end connecting support 4.3, a pin welded part 4.4, a frame connecting support 4.5, a fixed tensioning wheel 4.6, a track frame 4.7, an anti-slip rod 4.8, a supporting wheel 4.9, a telescopic tensioning wheel 4.10, a scraper 4.11, and a track tensioning bolt 4.12.

[0037] Among them, the driving wheel 4.2 is installed on the front and rear sides of the wheel-track bending and steering transmission system 3 by bolts, and is connected to the end output shaft 3.1.5 of the end assembly to realize power output. The end connecting support 4.3 is installed on the lower part of the front and rear end assemblies of the wheel-track bending and steering transmission system 3 by bolts, and is connected to the suspension mounting interface 3.1.6 at the lower part of the end shell 3.1.3. The end connecting support 4.3 is connected to the frame connecting support 4.5 through the pin shaft weldment 4.4. The frame connecting support 4.5 is fixed to the crawler frame 4.7 by bolts. The fixed tension wheel 4.6, the anti-drop rod 4.8 and the supporting wheel 4.9 are respectively fixed to the frame 4 by bolts. .7, the telescopic tensioner 4.10 can move back and forth on the frame 4.7, and the front and rear distance can be adjusted by adjusting the track tensioning bolt 4.12. The fixed tensioner 4.6 and the telescopic tensioner 4.10 are respectively mounted on the front and rear ends of the track frame 4.7, and the anti-slip rod 4.8 and the supporting wheel 4.9 are mounted below the track frame 4.7. The anti-slip rod 4.8 is located between the two core metals of the rubber track 4.1 to achieve an anti-slip effect. The driving wheel 4.2, the fixed tensioner 4.6, and the telescopic tensioner 4.10 are arranged in a triangle, and the rubber track 4.1 is mounted on the periphery. The scraper 4.11 is fixed to the support of the telescopic tensioner 4.10 by bolts.

[0038] like Figure 7 As shown, the end connecting support 4.3 and the frame connecting support 4.5 are connected by a pin weldment 4.4, forming the swing structure of the triangular crawler assembly 4. Two bosses A4.3.1 are designed on the front and rear surfaces of the lower surface of the end connecting support 4.3, and two bosses B4.5.1 are designed on the front and rear surfaces of the upper surface of the frame connecting support 4.5. The bosses A4.3.1 and the bosses B4.5.1 play a limiting role, used to limit the swing amplitude of the triangular crawler assembly 4. In this embodiment, the frame connecting support 4.5 drives the crawler frame 4.7 and the parts installed thereon to rotate around the end connecting support 4.3 through the pin weldment 4.4 at an angle of ±8°, thereby realizing the passability of the entire triangular crawler assembly 4.

[0039] The triangular crawler assembly 4 of the present invention has the following characteristics and functions: the rubber crawler 4.1 adopts a gear-type rubber crawler, and the driving wheel 4.2 is a cast gear with a large pitch diameter. During installation, the driving wheel 4.2 is connected to the terminal output shaft 3.1.5 by bolts. The large diameter driving wheel 4.2 ensures that the linear speed of the crawler will not be reduced too much, meeting the speed requirement of wheel-track interchangeability. The use of a wide crawler can reduce the ground pressure ratio; the upper part of the terminal connecting support 4.3 and the suspension mounting interface 3.1.6 below the terminal shell 3.1.3 are connected by bolts.

[0040] When the crawler walking mechanism is installed on the power chassis, the four triangular crawler assemblies 4 are respectively installed on the front and rear sides of the wheel-track bending and steering transmission system 3, such as Figure 1 As shown, the overall structure of the triangular track assembly 4 installed on the front and rear sides is the same, and only the track frame 4.7 structure is adjusted to be reversed in front and back to ensure that the telescopic tensioning wheel 4.10 of the triangular track assembly 4 installed on the front side of the power chassis is located in front of the track frame 4.7, and the telescopic tensioning wheel 4.10 of the triangular track assembly 4 installed on the rear side of the power chassis is located behind the track frame 4.7.

[0041] The crawler frame 4.7 is mainly made of rectangular tubes, round tubes and steel plates welded together; taking the triangular crawler assembly 4 installed on the right front or left rear of the frame as an example, the specific structure of the crawler frame 4.7 is as follows Figure 5 and 8As shown, the crawler frame 4.7 is composed of two rectangular tubes 1 4.7.3 and 2nd rectangular tube 4.7.6 arranged side by side. Two round tubes 4.7.5 and steel plate 1 4.7.1 are welded horizontally between the two rectangular tubes. Steel plate 1 4.7.1 is welded to one end of rectangular tube 1 4.7.3 and rectangular tube 2 4.7.6. Screw holes are opened on the steel plate for installing crawler adjustment bolts 4.12. A steel plate with holes is welded to the bottom of rectangular tube 1 4.7.3. The other end of the rectangular tube 1 4.7.3 is welded with a perforated steel plate 3 4.7.4. The rectangular tube 1 4.7.3 and the rectangular tube 2 4.7.6 of the left front / right rear track frame 4.7 are reversed in front and back positions, and the rest of the structure is the same; the fixed tension wheel 4.6 is connected to the perforated steel plate 3 4.7.4 by bolts, the anti-slip rod 4.8 and the two supporting wheels 4.9 are connected to the perforated steel plate 2 4.7.2 by bolts, and the anti-slip rod 4.8 is located at The rubber crawler 4.1 has an anti-slip effect between the two core metals; a rectangular steel pipe 3 4.10.1 is welded on the telescopic tensioning wheel 4.10 support, and the rectangular steel pipe 3 4.10.1 is assembled in the rectangular pipe 1 4.7.3 so that it can be horizontally extended and retracted. A top plate 4.10.2 is welded on the rectangular steel pipe 3 4.10.1, and a track tensioning bolt 4.12 is installed in the screw hole on the steel plate 1 4.7.1. The track tensioning bolt 4.12 is used to tighten the track. The top plate 4.10.2 limits the telescopic tensioning wheel 4.10 to achieve the tensioning function. The scraper 4.11 is installed on the rectangular steel pipe 3 4.10.1. The mounting hole of the scraper 4.11 is an oblong hole, and the mounting position can be adjusted. The supporting wheel scraper (not shown in the figure) is installed on the perforated steel plate 2 4.7.2, which has a certain mud scraping effect on the supporting wheel; the two rectangular tubes of the crawler frame 4.7 are welded with a steel plate 4.7.7, as shown in FIG. Figure 4 、 7 As shown in Figures 8 and 9, the frame connecting support 4.5 is connected to the steel plate 4.7.7 welded on the frame 4.7 by bolts, the lower part of the end connecting support 4.3 is pin-connected to the frame connecting support 4.5 by a pin welded part 4.4, and the end connecting support 4.3 is installed on the suspension mounting interface 3.1.6 below the end assembly by bolts to realize the connection between the crawler frame 4.7 and the end assembly. At the same time, the swing function of the crawler is realized through the pin connection and the limit boss.

[0042] The tractor wheel-track interchangeable power chassis of the present invention has a front-mounted power system 1, a waist-steering steering method, an external external meshing form at the end of the transmission system, a high ground clearance, and an end output shaft 3.1.5 and a suspension mounting interface 3.1.6 on the end shell 3.1.3 for mounting a triangular crawler assembly 4 or a wheel assembly 2; the chassis can realize the wheel and crawler interchangeability function, solving the problem of lack of a good chassis in tobacco-growing areas in the south; when tobacco operations in paddy fields require a large driving force and a small ground contact pressure, crawlers can be optionally installed for operations; when operations in dry fields are performed, wheels can be optionally installed for operations, thereby improving operating efficiency; the chassis has the advantages of wide ground clearance adaptability, high ground clearance, and good passability; it can adapt to complex terrain and agronomic requirements, and meet the operational needs of tobacco planting in hilly and mountainous areas.

[0043] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the present profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A tractor wheel-track interchangeable power chassis, comprising a power system (1), a transmission system and a traveling mechanism, characterized in that: The transmission system is a wheel-track folding and steering transmission system (3), the power system (1) is installed in the front of the wheel-track folding and steering transmission system (3), the walking mechanism is installed on the terminal assemblies on the front and rear sides of the wheel-track folding and steering transmission system (3), the walking mechanism is a crawler walking mechanism or a wheeled walking mechanism, and the wheel-track interchange is achieved by configuring the wheeled walking mechanism or the crawler walking mechanism on the power chassis.

2. The tractor wheel-track interchangeable power chassis according to claim 1, characterized in that: The wheel-track bending and steering transmission system (3) comprises a clutch assembly (3.6), a front box (3.5), a bending and steering assembly (3.4), a gearbox (3.3), a brake assembly (3.2) and an end assembly. The front box (3.5) and the gearbox (3.3) are hingedly connected via a pin shaft; an upper cross-shaft universal joint (3.9) and a lower cross-shaft universal joint (3.8) are respectively mounted on the upper and lower shaft heads between the front box (3.5) and the gearbox (3.3); the bending and steering assembly (3.4) is connected between the front box (3.5) and the gearbox (3.3); the brake assembly (3.2) is installed between the gearbox (3.3) and the left rear end assembly (3.1); the clutch assembly (3.6) is connected between the power system (1) and the front box (3.5); and the end assembly is respectively installed on the left and right sides of the front box (3.5) and the gearbox (3.3) and connected to the drive shaft.

3. The tractor wheel-track interchangeable power chassis according to claim 2, characterized in that: The terminal assembly is an external external meshing structure with an upper and lower height difference arrangement, comprising a left rear terminal assembly (3.1), a left front terminal assembly (3.7), a right front terminal assembly and a right rear terminal assembly; the right front terminal assembly and the left rear terminal assembly (3.1) have the same structure, and the left front terminal assembly (3.7) and the right rear terminal assembly have the same structure; the left front terminal assembly (3.1) and the right front terminal assembly are respectively mounted on the left and right sides of the front box (3.5) and the structures of the two are symmetrical, and the left rear terminal assembly (3.7) and the right rear terminal assembly are respectively mounted on the left and right sides of the gearbox (3.3).

4. The tractor wheel-track interchangeable power chassis according to claim 3, characterized in that: The left rear terminal assembly (3.1) includes a terminal housing (3.1.3), a terminal front end gear (3.1.2), a terminal rear end gear (3.1.4), a terminal output shaft (3.1.5) and a terminal cover (3.1.1). The terminal housing (3.1.3) is installed on the outside of the brake assembly (3.2). The terminal front end gear (3.1.2) is installed on the terminal housing (3.1.3) and connected to the drive shaft. The terminal rear end gear (3.1.4) is engaged with the terminal front end gear (3.1.2) and is located on the side and below the terminal front end gear (3.1.2). There is a height difference H between the two. The terminal output shaft (3.1.5) is fixed on the terminal rear end gear (3.1.4) for installing and driving the walking mechanism. The terminal cover (3.1.1) is installed on the terminal housing (3.1.3) to protect the internal components. A suspension mounting interface (3.1.6) is provided below the terminal housing (3.1.3).

5. The tractor wheel-track interchangeable power chassis according to claim 2, characterized in that: The crawler walking mechanism is a triangular crawler assembly (4), which includes a rubber crawler (4.1), a driving wheel (4.2), a fixed tensioning wheel (4.6), a telescopic tensioning wheel (4.10), a crawler frame (4.7), an anti-slip rod (4.8) and a supporting wheel (4.9). The driving wheel (4.2) is installed on the end assembly of the wheel-track bending and steering transmission system (3). The crawler frame (4.7) is located below the driving wheel (4.2). The crawler frame (4.7) is connected to the end assembly through a swing structure. Below the end assembly, a fixed tension wheel (4.6) and a telescopic tension wheel (4.10) are installed at the front and rear ends of the crawler frame (4.7), a supporting wheel (4.9) and an anti-drop rod (4.8) are installed below the crawler frame (4.7), a driving wheel (4.2), a fixed tension wheel (4.6), and a telescopic tension wheel (4.10) are arranged in a triangle, and a rubber crawler (4.1) is arranged on the periphery of the driving wheel (4.2), the telescopic tension wheel (4.10), the supporting wheel (4.9) and the fixed tension wheel (4.6).

6. The tractor wheel-track interchangeable power chassis according to claim 5, characterized in that: The swing structure comprises an end connection support (4.3), a frame connection support (4.5) and a pin welded part (4.4); the frame connection support (4.5) is connected above the crawler frame (4.7); the end connection support (4.3) is connected below the end assembly of the wheel-track bending and steering transmission system (3); the end connection support (4.3) and the frame connection support (4.5) are pin-connected via the pin welded part (4.4); a boss A (4.3.1) and a boss B (4.5.1) that cooperate with each other are provided below the end connection support (4.3) and above the frame connection support (4.5) to limit the swing angle of the frame connection support (4.5) around the end connection support (4.3) via the pin welded part (4.4).

7. The tractor wheel-track interchangeable power chassis according to claim 5, characterized in that: The rubber crawler track (4.1) is a gear-toothed crawler track, and the driving wheel (4.2) is a gear with a large pitch diameter.

8. The tractor wheel-track interchangeable power chassis according to claim 5, characterized in that: The crawler frame (4.7) is mainly welded from a rectangular tube 1 (4.7.3), a rectangular tube 2 (4.7.6), a round tube (4.7.5) and a plurality of steel plates. A rectangular tube 3 (4.10.1) is welded to the support of the telescopic tensioning wheel (4.10) and is sleeved inside the rectangular tube 1 (4.7.3) of the crawler frame (4.7) to achieve forward and backward movement. The telescopic tensioning wheel (4.10) is tensioned in one direction by a crawler tensioning bolt (4.12) installed on the crawler frame (4.7).

9. The tractor wheel-track interchangeable power chassis according to claim 8, characterized in that: A scraper plate (4.11) is mounted on the support of the telescopic tension wheel (4.10). The mounting hole on the scraper plate (4.11) is an oblong hole, and the mounting position can be adjusted.

10. The tractor wheel-track interchangeable power chassis according to claim 2, characterized in that: The wheel-track bending and steering transmission system (3) has the same output rotational speed at the front and rear ends, and the wheeled walking mechanism comprises four wheel assemblies (2) of the same size.

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