Tractor chassis with adjustable ground clearance

Abstract

The invention discloses a tractor chassis with adjustable ground clearance, which comprises a support chassis, two groups of walking wheel assemblies and walking tracks, the two groups of walking wheel assemblies are arranged on the two sides of the bottom of the support chassis, and the walking wheel assemblies are used for driving the walking tracks; when the device is used, the height adjusting mechanism can drive the synchronous pushing mechanism while adjusting the height of the supporting chassis relative to the ground, so that the distance between the two supporting side plates is adjusted while the gap between the supporting chassis and the ground is adjustable; the distance between the two walking crawlers is further adjusted, so that the gravity center of the supporting chassis can be synchronously adjusted according to the supporting height of the supporting chassis while the stable tensioning degree and adhesive force of the walking crawlers are guaranteed, the supporting stability of the supporting chassis of the tractor is guaranteed, and the phenomenon of rollover is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tracked tractor chassis, in particular to a tractor chassis with adjustable ground clearance. BACKGROUND

[0002] The tracked tractor, also known as a chain track tractor or a tracked tractor, is an agricultural machine that moves on the ground through a tracked walking device. The tracked tractor has a large contact area with the ground and a small unit area pressure, reducing soil compaction damage.

[0003] The existing tracked tractor adjusts the height of the chassis by adjusting the height of the two sides of the track, which simultaneously adjusts the height of the chassis. However, this adjustment method cannot guarantee the tension of the track, which may cause the track to derail. On the other hand, if the track is raised to raise the chassis, the center of gravity of the chassis will move upwards, which may cause the tracked tractor to tip over, especially when working on a slope. Therefore, we propose a tractor chassis with adjustable ground clearance. SUMMARY

[0004] The present application aims to provide a tractor chassis with adjustable ground clearance to solve the problems mentioned in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a tractor chassis with adjustable ground clearance, comprising a support chassis, a walking wheel assembly and a walking track, the walking wheel assembly is provided with two groups, and the two groups of walking wheel assemblies are arranged on both sides of the bottom of the support chassis, the walking wheel assembly is used to drive the walking track, two reinforcing frames are arranged on both sides of the bottom of the support chassis, two synchronous displacement mechanisms are arranged at the reinforcing frames, two support side plates are connected to the synchronous displacement mechanisms, the support side plates are used to support the walking wheel assembly, a protection support mechanism is arranged at the support side plates, and the protection support mechanism is used to protect the walking track when moving.

[0006] Two support blocks are fixedly installed at both ends of the side of the two reinforcing frames close to each other, a walking column is arranged on the support block, a lifting shell is fixedly installed at each corner of the support chassis, four lifting shells are slidingly sleeved outside the four walking columns, a height adjustment mechanism is connected between the four lifting shells, and a guide rack is arranged at the height adjustment mechanism corresponding to the walking column.

[0007] The height adjustment mechanism drives the four synchronous displacement mechanisms, a driving mechanism is further arranged on the support chassis, and the driving mechanism is used to drive the height adjustment mechanism.

[0008] Further, the reinforcing frame is provided with a groove corresponding to the position of the synchronous push mechanism, the synchronous push mechanism comprises a rotating shaft, a reverse part, a push branch and a push block, the rotating shaft is provided with two, both of which are rotationally connected to the reinforcing frame, the reverse part is installed at the top of the two rotating shafts, and the reverse part is connected with the height adjusting mechanism;

[0009] One end of the push branch is fixedly sleeved outside the rotating shaft, and the other end of the push branch is rotationally connected with the push block, the push block is provided with a guide groove, and the support side plate is provided with a guide rail corresponding to the position of the guide groove.

[0010] Further, the reverse part comprises a first rotary gear and a second rotary gear, the first rotary gear and the second rotary gear are respectively fixedly installed at the top of the two rotating shafts, and the first rotary gear and the second rotary gear are meshingly connected, and the reverse part is provided, so that the two rotating shafts are reversely rotated.

[0011] Further, the height adjusting mechanism comprises a synchronous rod and a transmission connecting piece, the synchronous rod is provided with two, the synchronous rod penetrates through two lifting housings on one side of the support base, and the synchronous rod is rotationally connected with the lifting housing, both ends of the synchronous rod are respectively fixedly connected with rotary gears, and the rotary gears are meshingly connected with guide racks;

[0012] The transmission connecting piece is arranged at the lifting housing, and both ends of the transmission connecting piece are respectively connected with the synchronous rod and the first rotary gear;

[0013] One end of each of the two synchronous rods is fixedly installed with a worm gear, the worm gear is located inside the lifting housing, a worm is meshingly connected outside the worm gear, and the two worm gears are fixedly connected with a rotating rod, the rotating rod is rotationally connected with two adjacent lifting housings, and the driving mechanism is used for driving the rotating rod, and the height adjusting mechanism is provided, so that the height of the support base is synchronously adjusted.

[0014] Further, the transmission connecting piece comprises a driving rod, a sliding sleeve and a rotating part, the driving rod is fixedly installed on the first rotary gear, the driving rod is provided with two sliding grooves, the sliding sleeve is slidingly sleeved outside the top of the driving rod, two guide blocks are fixedly installed on the inner wall of the sliding sleeve, the guide blocks are slidingly connected with the sliding grooves, the sliding sleeve penetrates through the bottom of the lifting housing, and the sliding sleeve is rotationally connected with the lifting housing, the rotating part is arranged on the top of the sliding sleeve, and the rotating part is connected with the synchronous rod, the transmission connecting piece is provided, so that the first rotary gear is synchronously driven.

[0015] Further, the rotating part comprises a first straight bevel gear and a second straight bevel gear, the first straight bevel gear is fixedly installed at the top of the sliding sleeve, and the first straight bevel gear is in meshing connection with the second straight bevel gear, the second straight bevel gear is fixedly sleeved on the synchronous rod, and the rotating part is arranged, so that the sliding sleeve is driven.

[0016] Further, the driving mechanism comprises a driving motor, a first driving gear and a second driving gear, the driving motor is fixedly installed on the support base plate, the output end of the driving motor is fixedly connected with the first driving gear, the first driving gear is in meshing connection with the second driving gear, and the second driving gear is fixedly sleeved on the outer side of the rotating rod, the driving mechanism is arranged, so that the rotating rod is driven.

[0017] Further, the protection supporting mechanism comprises a hydraulic cylinder, a pushing shaft, connecting rods and a positioning part, the hydraulic cylinder is rotatably connected at the support side plate, and the output end of the hydraulic cylinder is fixedly connected with the pushing shaft, two connecting rods are arranged, one end of each of the two connecting rods is rotatably connected with the pushing shaft, the positioning part is arranged between the support side plate and the connecting rods, the bottoms of the two connecting rods are provided with a contact part, and the protection supporting mechanism is arranged, so that the walking track is protected before being adjusted.

[0018] Further, the positioning part comprises positioning rods, a positioning seat and a positioning shaft, two groups of the positioning rods are arranged, one group of the positioning rods is arranged at each side of the hydraulic cylinder, the positioning rod is rotatably connected with the support side plate through the positioning seat, and the other end of the positioning rod is rotatably connected with the connecting rod through the positioning shaft, and the positioning part is arranged, so that the connecting rod is connected and positioned.

[0019] Further, the contact part comprises a fixed plate, a fixed shaft and contact rollers, the fixed plate is fixedly installed at the bottom between the two connecting rods, the fixed shaft is fixedly installed at the bottom of the fixed plate, two contact rollers are arranged, and the two contact rollers are rotatably sleeved on the outer side of the fixed shaft, and the contact part is arranged, so that the ground can be contacted.

[0020] The present application has at least the following advantages:

[0021] 1. When in use, this invention utilizes a reinforcing frame located below the support chassis, and two synchronous pushing mechanisms located at the reinforcing frame. These synchronous pushing mechanisms are connected to the support side plates. Simultaneously, a height adjustment mechanism adjusts the height of the support chassis relative to the ground while driving the synchronous pushing mechanisms. This allows for adjustment of the ground clearance of the support chassis, as well as the adjustment of the distance between the two support side plates. Furthermore, it allows for adjustment of the distance between the two tracks. This ensures stable tension and adhesion of the tracks while simultaneously adjusting the center of gravity of the support chassis according to its support height, ensuring the stability of the tractor's support chassis and preventing tipping.

[0022] 2. The present invention, through the provision of a protective support mechanism, can protect the tracks before the height adjustment mechanism is operated. That is, while the height of the two tracks is adjusted along the chassis, the protective support mechanism is in contact with the ground, preventing wear and derailment of the tracks during the adjustment of the spacing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a front view of the overall structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the supporting chassis structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the walking wheel assembly structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the support block structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the supporting side plate structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the drive mechanism structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the protective support mechanism of the present invention;

[0031] Figure 9 For the present invention Figure 8 Enlarged structural diagram of region A in the middle;

[0032] Figure 10 This is a schematic diagram of the positioning component structure of the present invention;

[0033] Figure 11 This is a schematic diagram of the reinforced frame structure of the present invention;

[0034] Figure 12 For the application Figure 11 The schematic diagram of the B area amplification structure in the application is shown in the figure.

[0035] Figure 13 For the application Figure 11 The schematic diagram of the C area amplification structure in the application is shown in the figure.

[0036] Figure 14 The schematic diagram of the sliding sleeve structure in the application is shown in the figure.

[0037] Figure 15 The schematic diagram of the contact roller structure in the application is shown in the figure.

[0038] In the figure: 1 - support chassis; 2 - walking wheel assembly; 3 - walking track; 4 - reinforcing frame; 41 - support block; 42 - walking column; 421 - guide rack; 43 - groove; 5 - synchronous push mechanism; 51 - rotating shaft; 52 - reverse piece; 521 - first rotating gear; 522 - second rotating gear; 53 - push branch; 54 - push block; 541 - guide groove; 6 - support side plate; 61 - guide rail; 7 - protection support mechanism; 71 - hydraulic cylinder; 72 - push shaft; 73 - connecting branch; 74 - positioning piece; 741 - positioning branch; 742 - positioning seat; 743 - positioning shaft; 75 - contact piece; 751 - fixed plate; 752 - fixed shaft; 753 - contact roller; 8 - lifting shell; 9 - height adjusting mechanism; 91 - synchronous rod; 92 - transmission connecting piece; 921 - drive rod; 922 - sliding sleeve; 923 - rotating piece; 9231 - first straight bevel gear; 9232 - second straight bevel gear; 93 - rotating gear; 94 - worm wheel; 95 - worm; 96 - rotating rod; 10 - driving mechanism; 101 - driving motor; 102 - first driving gear; 103 - second driving gear. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0040] Embodiment one

[0041] Please refer to Figures 1 to 5The adjustable ground clearance tractor chassis comprises a supporting chassis 1, a walking wheel assembly 2 and a walking track 3, the walking wheel assembly 2 is provided with two groups, and the two groups of walking wheel assemblies 2 are arranged on the two sides of the bottom of the supporting chassis 1, the walking wheel assembly 2 is used for driving the walking track 3, and the two sides of the bottom of the supporting chassis 1 are respectively provided with a reinforcing frame 4, the reinforcing frame 4 contains reinforcing ribs inside, and the reinforcing frame 4 plays a role of improving the supporting strength of the reinforcing frame 4;

[0042] Two synchronous pushing mechanisms 5 are arranged at the reinforcing frame 4, support side plates 6 are connected to the two synchronous pushing mechanisms 5, the support side plates 6 are used for supporting the walking wheel assembly 2, and the support side plates 6 are provided with protection supporting mechanisms 7, and the protection supporting mechanisms 7 are used for protecting the walking track 3 during movement;

[0043] Please refer to Figures 4 to 9 and Figure 15 The protection supporting mechanism 7 comprises a hydraulic cylinder 71, a pushing shaft 72, a connecting branch 73 and a positioning piece 74, the hydraulic cylinder 71 is rotationally connected at the support side plate 6, the output end of the hydraulic cylinder 71 is fixedly connected with the pushing shaft 72, the connecting branch 73 is provided with two, one end of each of the two connecting branches 73 is rotationally connected with the pushing shaft 72, the positioning piece 74 is arranged between the support side plate 6 and the connecting branch 73, and the bottoms of the two connecting branches 73 are provided with a contact piece 75.

[0044] The positioning piece 74 comprises a positioning branch 741, a positioning seat 742 and a positioning shaft 743, the positioning branch 741 is provided with two groups, the two groups of positioning branches 741 are arranged on the two sides of the hydraulic cylinder 71, the positioning branch 741 is rotationally connected with the support side plate 6 through the positioning seat 742, and the other end of the positioning branch 741 is rotationally connected with the connecting branch 73 through the positioning shaft 743.

[0045] The contact piece 75 comprises a fixed plate 751, a fixed shaft 752 and a contact roller 753, the fixed plate 751 is fixedly installed at the bottom between the two connecting branches 73, the fixed shaft 752 is fixedly installed at the bottom of the fixed plate 751, the contact roller 753 is provided with two, and the two contact rollers 753 are rotationally sleeved outside the fixed shaft 752, in the application, anti-skid lines are arranged outside the contact roller 753, so as to enhance the friction of the contact roller 753 and ensure stable rotation of the contact roller 753;

[0046] Specific implementation process: when the support height of the support base 1 is adjusted, the two hydraulic cylinders 71 are operated synchronously, and when the hydraulic cylinders 71 are operated, the two pushing rods are pushed by the pushing shaft 72, and the pushing rod and the positioning rod 741 in the folded state are unfolded under the connection and limiting action of the two groups of positioning rods 741, and the contact rollers 753 are driven by the fixed plate 751 to move downward along the ground until the two groups of contact rollers 753 are in contact with the ground, and the two contact rollers 753 are lifted relative to the support side plate 6 and the walking track 3, so that the bottoms of the two walking tracks 3 are separated from the ground;

[0047] Meanwhile, the protection support mechanism 7 in the application can also support and lift the walking track 3, so as to facilitate the maintenance and replacement of the walking track 3.

[0048] Please refer to Figures 10 to 14 The position of the reinforcing frame 4 corresponding to the synchronous pushing mechanism 5 is provided with a groove 43, the synchronous pushing mechanism 5 comprises rotating shafts 51, reverse parts 52, pushing rods 53 and pushing blocks 54, the rotating shafts 51 are provided with two, and the two rotating shafts 51 are both rotationally connected to the reinforcing frame 4, the reverse part 52 is installed at the top end of the two rotating shafts 51, and the reverse part 52 is connected with the height adjusting mechanism 9.

[0049] One end of the pushing rod 53 is fixedly sleeved outside the rotating shaft 51, and the other end of the pushing rod 53 is rotationally connected with the pushing block 54, the pushing block 54 is provided with a guide groove 541, and the support side plate 6 is provided with a guide rail 61 corresponding to the position of the guide groove 541.

[0050] The reverse part 52 comprises first rotating gears 521 and second rotating gears 522, the first rotating gears 521 and the second rotating gears 522 are respectively fixedly installed at the top of the two rotating shafts 51, and the first rotating gears 521 and the second rotating gears 522 are in meshing connection.

[0051] Specifically, when the height adjusting mechanism 9 operates, the first rotating gear 521 rotates, the second rotating gear 522 rotates in the opposite direction, and the two rotating shafts 51 drive the push rod 53 to rotate in the opposite direction. When the support chassis 1 moves upward, the rotating rod rotates, and the push block 54 pushes the support side plate 6 in the suspended state, until the support chassis 1 stops rising. The two walking tracks 3 are adjusted synchronously with the support side plate 6, thereby increasing the distance between the two walking tracks 3, improving the support range of the walking track 3, and balancing the center of gravity of the support chassis 1 after adjusting the height, thereby ensuring the stability of the support chassis 1.

[0052] Please refer to Figures 5 to 14 The two reinforcing frames 4 are respectively fixedly installed with support blocks 41 on the side close to each other, the support blocks 41 are provided with walking columns 42, the support chassis 1 is respectively fixedly installed with lifting housings 8 at four corners, the four lifting housings 8 are respectively slidably sleeved outside the four walking columns 42, the four lifting housings 8 are connected with a height adjusting mechanism 9, and the walking column 42 is provided with a guide rack 421 corresponding to the height adjusting mechanism 9.

[0053] The height adjusting mechanism 9 drives the four synchronous push mechanisms 5, and the support chassis 1 is further provided with a driving mechanism 10 for driving the height adjusting mechanism 9.

[0054] The height adjusting mechanism 9 comprises two synchronous rods 91 and a transmission connecting piece 92, the two synchronous rods 91 penetrate through the two lifting housings 8 on one side of the support chassis 1 and are rotationally connected with the lifting housings 8, the two ends of the synchronous rod 91 are respectively fixedly connected with rotating gears 93, and the rotating gears 93 are meshingly connected with the guide racks 421.

[0055] The transmission connecting piece 92 is arranged at the lifting housing 8, and the two ends of the transmission connecting piece 92 are respectively connected with the synchronous rod 91 and the first rotating gear 521.

[0056] One end of each of the two synchronous rods 91 is fixedly installed with a worm gear 94, the worm gear 94 is located inside the lifting housing 8, the outer side of the worm gear 94 is meshingly connected with a worm 95, the two worms 95 are fixedly connected with a rotating rod 96, the rotating rod 96 is rotationally connected with two adjacent lifting housings 8, and the driving mechanism 10 drives the rotating rod 96.

[0057] The transmission connecting piece 92 comprises a driving rod 921, a sliding sleeve 922 and a rotating piece 923, the driving rod 921 is fixedly installed on the first rotating gear 521, two sliding grooves are arranged on the driving rod 921, the sliding sleeve 922 is slidingly sleeved on the outer side of the top of the driving rod 921, two guide blocks are fixedly installed on the inner wall of the sliding sleeve 922 and slidingly connected with the sliding grooves, the top of the sliding sleeve 922 penetrates the bottom of the lifting shell 8 and is rotationally connected with the lifting shell 8, the rotating piece 923 is arranged on the top of the sliding sleeve 922 and connected with the synchronous rod 91, the guide blocks are arranged and the sliding grooves are arranged on the driving rod 921, so that the sliding sleeve 922 can move up or down relative to the driving rod 921 through the guide blocks, and the sliding sleeve 922 can drive the driving rod 921 to synchronously rotate while rotating.

[0058] The rotating piece 923 comprises a first straight-toothed bevel gear 9231 and a second straight-toothed bevel gear 9232, the first straight-toothed bevel gear 9231 is fixedly installed on the top of the sliding sleeve 922 and meshingly connected with the second straight-toothed bevel gear 9232, and the second straight-toothed bevel gear 9232 is fixedly sleeved on the synchronous rod 91.

[0059] Specific implementation process: in the application, the lifting shell 8 not only plays a role in supporting the support base 1, but also plays a role in self-locking of the worm gear 94 and the worm 95 in the support when not rotating, so as to stably support the adjusted support base 1.

[0060] Specifically, when adjusting, the driving mechanism 10 operates, and then the two worms 95 are driven to synchronously rotate by the rotating rod 96, when the two worms 95 rotate, the worm gears 94 on the two worms 95 synchronously and reversely rotate respectively, and when the worm gears 94 rotate, the synchronous rod 91 on the worm gears 94 rotates, the synchronous rod 91 drives the rotating gears 93 at both ends to rotate, and when the rotating gears 93 rotate, the lifting shell 8 climbs or moves down along the guide rack 421 on the walking column 42.

[0061] On the other hand, when the synchronous rod 91 rotates, the sliding rod drives the driving rod 921 to synchronously rotate through the rotating piece 923, the driving rod 921 rotates, and the first rotating gear 521 synchronously rotates, so as to adjust the support connection angle of the push rod 53.

[0062] Thus, the height of the support chassis 1 is adjusted, and the support spacing between the two walking tracks 3 is synchronously and accurately adjusted, so as to ensure the stability of the walking tracks 3, and under the connection of the protection support mechanism 7, the walking tracks 3 are prevented from derailing or rubbing during the adjustment of the spacing, and the protection of the walking tracks 3 is simultaneously achieved.

[0063] Embodiment two

[0064] Please refer to Figures 6 to 7 Embodiment two is a further supplement to embodiment one, specifically, the driving mechanism 10 comprises a driving motor 101, a first driving gear 102 and a second driving gear 103, the driving motor 101 is fixedly installed on the support chassis 1, and the output end of the driving motor 101 is fixedly connected with the first driving gear 102, the first driving gear 102 is meshingly connected with the second driving gear 103, and the second driving gear 103 is fixedly sleeved outside the rotating rod 96.

[0065] Thus, when the rotating rod 96 is driven, the driving motor 101 operates, so as to drive the first driving gear 102 to rotate the second driving gear 103, when the second driving gear 103 rotates, the rotating rod 96 is synchronously driven to rotate, and when the rotating rod 96 rotates, the two end worm gears 95 are synchronously driven to rotate, and when the two end worm gears 95 rotate, the two worm gears 94 are synchronously driven to rotate in opposite directions.

[0066] It should be noted that in this document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0067] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A tractor chassis with adjustable ground clearance, comprising a supporting chassis (1), a traveling wheel assembly (2), and a traveling track (3), wherein the traveling wheel assembly (2) is provided in two sets, and the two sets of traveling wheel assemblies (2) are disposed on both sides of the bottom of the supporting chassis (1), and the traveling wheel assembly (2) is used to drive the traveling track (3), characterized in that: The support chassis (1) is provided with reinforcing frames (4) on both sides below it. Two synchronous pushing mechanisms (5) are provided at the reinforcing frames (4). Support side plates (6) are connected to the two synchronous pushing mechanisms (5). The support side plates (6) are used to support the walking wheel assembly (2). A protective support mechanism (7) is provided at the support side plates (6). The protective support mechanism (7) is used to protect the walking track (3) when it moves. Support blocks (41) are fixedly installed at both ends of the two reinforced frames (4) on one side of each other. A walking column (42) is provided on the support block (41). Lifting shells (8) are fixedly installed at the four corners of the support chassis (1). The four lifting shells (8) are slidably sleeved on the outside of the four walking columns (42). The four lifting shells (8) are connected to each other by a height adjustment mechanism (9). A guide rack (421) is provided at the walking column (42) corresponding to the height adjustment mechanism (9). The height adjustment mechanism (9) drives the four synchronous pushing mechanisms (5), and the support chassis (1) is also provided with a driving mechanism (10) for driving the height adjustment mechanism (9).

2. The tractor chassis with adjustable ground clearance according to claim 1, characterized in that: The reinforcing frame (4) is provided with a groove (43) at the position corresponding to the synchronous pushing mechanism (5). The synchronous pushing mechanism (5) includes a rotating shaft (51), a reversing component (52), a pushing support rod (53), and a pushing block (54). There are two rotating shafts (51), and both rotating shafts (51) are rotatably connected to the reinforcing frame (4). The reversing component (52) is installed at the top of the two rotating shafts (51) and is connected to the height adjustment mechanism (9). One end of the push rod (53) is fixedly sleeved on the outside of the rotating shaft (51), and the other end of the push rod (53) is rotatably connected to the push block (54). The push block (54) is provided with a guide groove (541), and the support side plate (6) is provided with a guide rail (61) corresponding to the guide groove (541).

3. A tractor chassis with adjustable ground clearance according to claim 2, characterized in that: The reverse component (52) includes a first rotating gear (521) and a second rotating gear (522). The first rotating gear (521) and the second rotating gear (522) are respectively fixedly installed on the top of two rotating shafts (51), and the first rotating gear (521) and the second rotating gear (522) are meshed together.

4. A tractor chassis with adjustable ground clearance according to claim 3, characterized in that: The height adjustment mechanism (9) includes a synchronizing rod (91) and a transmission connector (92). There are two synchronizing rods (91). The synchronizing rods (91) pass through two lifting housings (8) on one side of the supporting chassis (1) and are rotatably connected to the lifting housings (8). Rotating gears (93) are fixedly connected to both ends of the synchronizing rods (91) and are meshed with guide racks (421). The transmission connector (92) is located at the lifting housing (8), and both ends of the transmission connector (92) are connected to the synchronizing rod (91) and the first rotating gear (521) respectively. One end of each of the two synchronizing rods (91) is fixedly mounted with a worm gear (94). The worm gear (94) is located inside the lifting housing (8). A worm (95) is meshed with the outside of the worm gear (94). A rotating rod (96) is fixedly connected between the two worms (95). The rotating rod (96) is rotatably connected to two adjacent lifting housings (8). The driving mechanism (10) is used to drive the rotating rod (96).

5. A tractor chassis with adjustable ground clearance according to claim 1, characterized in that: The transmission connector (92) includes a drive rod (921), a sliding sleeve (922), and a rotating component (923). The drive rod (921) is fixedly mounted on the first rotating gear (521). The drive rod (921) has two sliding grooves. The sliding sleeve (922) is slidably sleeved on the outer side of the top of the drive rod (921). Two guide blocks are fixedly mounted on the inner wall of the sliding sleeve (922), and the guide blocks are slidably connected to the sliding grooves. The top of the sliding sleeve (922) penetrates the bottom of the lifting housing (8), and the sliding sleeve (922) is rotatably connected to the lifting housing (8). The rotating component (923) is located on the top of the sliding sleeve (922), and the rotating component (923) is connected to the synchronizing rod (91).

6. A tractor chassis with adjustable ground clearance according to claim 5, characterized in that: The rotating component (923) includes a first straight bevel gear (9231) and a second straight bevel gear (9232). The first straight bevel gear (9231) is fixedly mounted on the top of the sliding sleeve (922), and the first straight bevel gear (9231) meshes with the second straight bevel gear (9232). The second straight bevel gear (9232) is fixedly sleeved on the synchronizing rod (91).

7. A tractor chassis with adjustable ground clearance according to claim 4, characterized in that: The drive mechanism (10) includes a drive motor (101), a first drive gear (102) and a second drive gear (103). The drive motor (101) is fixedly mounted on the support chassis (1), and the output end of the drive motor (101) is fixedly connected to the first drive gear (102). The first drive gear (102) is meshed with the second drive gear (103), and the second drive gear (103) is fixedly sleeved on the outside of the rotating rod (96).

8. A tractor chassis with adjustable ground clearance according to claim 1, characterized in that: The protective support mechanism (7) includes a hydraulic cylinder (71), a push shaft (72), a connecting rod (73), and a positioning element (74). The hydraulic cylinder (71) is rotatably connected to the support side plate (6), and the output end of the hydraulic cylinder (71) is fixedly connected to the push shaft (72). There are two connecting rods (73), and one end of each connecting rod (73) is rotatably connected to the push shaft (72). The positioning element (74) is located between the support side plate (6) and the connecting rod (73). The bottoms of the two connecting rods (73) are provided with contact elements (75) to each other.

9. A tractor chassis with adjustable ground clearance according to claim 8, characterized in that: The positioning component (74) includes a positioning support rod (741), a positioning seat (742), and a positioning shaft (743). The positioning support rod (741) is provided in two sets, and the two sets of positioning support rods (741) are respectively arranged on both sides of the hydraulic cylinder (71). The positioning support rod (741) is rotatably connected to the support side plate (6) through the positioning seat (742), and the other end of the positioning support rod (741) is rotatably connected to the connecting support rod (73) through the positioning shaft (743).

10. A tractor chassis with adjustable ground clearance according to claim 8, characterized in that: The contact element (75) includes a fixing plate (751), a fixing shaft (752), and contact rollers (753). The fixing plate (751) is fixedly installed at the bottom between two connecting rods (73). The fixing shaft (752) is fixedly installed at the bottom of the fixing plate (751). There are two contact rollers (753), and the two contact rollers (753) are rotatably sleeved on the outside of the fixing shaft (752).

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