A high ground clearance zero turn gearbox

Abstract

The application provides a high-clearance zero-turn gearbox, which comprises a shell and a control mechanism arranged in the shell, the bottom end of the shell is fixed with a first fixing cylinder and a second fixing cylinder through bolt screwing on both sides, one end of the first fixing cylinder and the second fixing cylinder is respectively fixed with a first extension shell and a second extension shell through bolt screwing, and the bottom end of the first extension shell and the second extension shell is fixed with a first output cylinder and a second output cylinder through bolt screwing on one side. By arranging one walking pump and one walking motor, the situation that the walking pump and the walking motor are out of sync due to different volume efficiencies does not exist, and the cooperation with the control mechanism such as the hydraulic cylinder and the adjusting shaft rod can realize the zero-turn and straight-line control of the track-type harvester, which is convenient for harvesting operation in the working conditions such as hilly areas, the overall height of the shell can be improved through the first extension shell and the second extension shell, and the situation that the whole vehicle is trapped due to small ground clearance of the whole vehicle is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of track harvester gearbox, specifically is a high ground clearance zero turning gearbox. BACKGROUND

[0002] The track harvester is agricultural machinery that advances and turns through driving the track to rotate, has stronger adaptability and flexibility, and is particularly suitable for operation in the environment that the soil is wet or muddy.

[0003] The track harvester has the following defects: when the track harvester is used for harvesting operation in the hilly area, the differential turning and zero turning of the track harvester are more suitable for the working condition requirement of the hilly area because the working space is small; the track harvester is usually driven by a double pump and double motor system to realize the walking and turning of the track harvester, but because the volume efficiency of the walking pump and walking motor on the left and right sides is different, the tracks on the left and right sides cannot be completely synchronized, so the operator needs to frequently correct the walking direction; in the working condition that the wet mud is deep, the track harvester has small ground clearance, and the track harvester is easily trapped.

[0004] Therefore, the utility model discloses a high ground clearance zero turning gearbox. UTILITY MODEL CONTENTS

[0005] In view of the defects in the prior art, the utility model aims at providing a high ground clearance zero turning gearbox to solve the problems in the background art, the utility model is provided with one walking pump and one walking motor, the walking pump and walking motor do not have the situation that the tracks on the left and right sides are out of synchronization because of different volume efficiency, and cooperate with the control mechanism such as hydraulic cylinder and adjusting shaft rod, so that the zero turning and straight running control of the track harvester can be realized, harvesting operation in the working condition such as the hilly area is facilitated, the first extension shell and second extension shell are arranged to improve the overall height of the shell body, and the situation that the track harvester is trapped because of small ground clearance is avoided.

[0006] In order to achieve the above object, the utility model is through the following technical scheme to realize: a high ground clearance zero turn gearbox, including shell and inside setting up control mechanism, both sides of the bottom of shell are fixed with first fixed cylinder and second fixed cylinder through bolt screw joint, one end of first fixed cylinder and second fixed cylinder is fixed with first extension shell and second extension shell through bolt screw joint respectively, the bottom one side of first extension shell and second extension shell is fixed with first output cylinder and second output cylinder through bolt screw joint, the top of shell is fixedly provided with power input box, the control mechanism includes fixed axle rod, adjusting axle rod and adjusting mechanism, the inside of shell is provided with fixed axle rod, one end of fixed axle rod is slidably installed in the inside of one end of adjusting axle rod, the outside of the other end of adjusting axle rod is limitingly slidably installed with installation cylinder, the outside of the other end of adjusting axle rod is alternately fixedly installed with two second gear and third gear, the adjusting mechanism includes fixed box and movable rod, one end of fixed box is fixedly provided with hydraulic cylinder, one end of hydraulic cylinder is limitingly rotatably installed in the inside of the other end of adjusting axle rod.

[0007] Further, the power input box is fixedly installed on the rear side of the top of the shell, the inside of the power input box is rotatably installed with a power input shaft through a bearing, the inner end of the power input shaft is fixedly provided with an input gear, and the other end of the power input shaft is arranged on the outside of the power input box.

[0008] Further, the bottom of the power input shaft is rotatably installed with a traveling pump shaft through a bearing corresponding to the inside of the power input box, the outside of the traveling pump shaft is fixedly installed with a first gear, the first gear and the input gear are meshed and arranged in parallel, and a first mounting hole is formed in the inside of one end of the traveling pump shaft.

[0009] Further, the inside of the upper end of the shell is rotatably installed with a traveling motor shaft through a bearing, the both ends of the traveling motor shaft are fixedly installed with output gears, one end of the traveling motor shaft is provided with a second mounting hole, and a second through hole is formed in the outer wall of the shell corresponding to the position of the second mounting hole.

[0010] Further, the traveling motor shaft is arranged above the adjusting axle rod, the two output gears and the second gear are meshed and arranged in parallel, the fixed box is fixedly arranged on the outer wall of the shell, the movable rod is fixedly arranged on the end of the output rod of the hydraulic cylinder, and the adjusting axle rod is arranged in the inside of the fixed box.

[0011] Further, the hydraulic cylinder is arranged outside the shell, first pressure sensors are fixedly arranged on the inner wall of one side of the fixed box and correspond to the top and bottom of the movable rod, bearings are mounted on the outer side of the mounting cylinder, the bearings are fixedly mounted in the interior of the shell, and a front cover plate is fixedly mounted on the front end face of the shell through bolts.

[0012] Further, one end of the mounting cylinder is movably arranged in the interior of the fixed box, lugs are fixedly arranged on the inner wall of one end of the mounting cylinder and are symmetrically arranged on both sides, a sliding groove is formed in the outer wall of the other end of the adjusting shaft rod and corresponds to the position of the lugs, and the lugs are slidably mounted in the interior of the sliding groove.

[0013] Further, a first cover plate is fixedly arranged on one end of the fixed shaft rod, the first cover plate is fixedly mounted on the outer wall of the lower end of the shell through bolts, second pressure sensors are symmetrically fixedly arranged on the end face of the other end of the fixed shaft rod, and the second pressure sensors are arranged in the interior of one end of the adjusting shaft rod.

[0014] Further, the interiors of the first fixed cylinder and the second fixed cylinder are rotatably mounted with first transmission shaft rods and second transmission shaft rods through bearings mounted in the interiors, fourth gears are fixedly arranged on one end of the first transmission shaft rod and the second transmission shaft rod and correspond to the interior of the shell, the fourth gears are arranged in parallel and are intermeshed with two third gears on both sides, and first transmission gears are fixedly mounted on the outer side of the other end of the first transmission shaft rod and the second transmission shaft rod and correspond to the interiors of the first extension shell and the second extension shell.

[0015] Further, the interiors of the first output cylinder and the second output cylinder are rotatably mounted with first output shafts and second output shafts through bearings, second transmission gears are fixedly arranged on one end of the first output shaft and the second output shaft and correspond to the interiors of the first extension shell and the second extension shell, the first transmission gears and the second transmission gears are arranged in intermeshing mode, second cover plates are sealingly mounted on the outer side of one end of the first output cylinder and the second output cylinder and correspond to the first output shaft and the second output shaft and are fixed through bolts, drive wheels are mounted on the outer ends of the first output shaft and the second output shaft, and nuts are fixedly screwed on the outer side of the drive wheels and correspond to the first output shaft and the second output shaft.

[0016] The high-ground-clearance zero-turn gearbox has the advantages that the high-ground-clearance zero-turn gearbox is provided with a plurality of gears, and the gears are arranged in intermeshing mode, so that the gearbox can be used for driving a plurality of wheels to rotate in the same direction or in opposite directions, and the gearbox can be used for driving a plurality of wheels to rotate at the same speed or at different speeds.

[0017] 1. The high ground clearance zero turning gearbox is convenient for driving and controlling the walking pump through the power input shaft, the input gear, the first gear and the walking pump shaft, driving and controlling the walking motor through the walking pump, and is convenient for driving the first output shaft and the second output shaft to rotate synchronously through the walking motor, the walking motor shaft, the output gear, the control mechanism, the fourth gear, the first transmission shaft rod, the second transmission shaft rod, the first transmission gear and the second transmission gear, and there is no situation that the walking pump and the walking motor are out of sync due to different volume efficiencies, the advancing direction does not need to be frequently adjusted, the straight advancing of the crawler-type harvester is convenient to control, and the workload of the operator is reduced; and in cooperation with the control mechanism such as the hydraulic cylinder and the adjusting shaft rod, the straight advancing control of the crawler-type harvester can be realized.

[0018] 2. The high ground clearance zero turning gearbox can adjust the lateral movement of the adjusting shaft rod through the movable rod by adjusting the left and right directions of the movable rod through the hydraulic cylinder, the second gears on the two sides can be engaged and separated from the output gear, the left or right second gear is separately engaged with the output gear, the rotation control of the first output shaft and the second output shaft is convenient to separately control, the left or right track is convenient to drive to rotate, and the track on the other side is not powered, the zero turning control of the crawler-type harvester can be realized, and the harvesting operation in the working conditions such as hilly areas is convenient; the fixed shaft rod and the mounting cylinder are arranged to support and limit the adjusting shaft rod, and the rotation of the adjusting shaft rod is convenient; the first pressure sensor and the second pressure sensor are arranged to monitor the movement state of the adjusting shaft rod, and the adjusting shaft rod is convenient to adjust subsequently.

[0019] 3. The high ground clearance zero turning gearbox can increase the overall height of the shell through the first extension shell and the second extension shell, increase the ground clearance of the crawler-type harvester, avoid the situation that the vehicle is stuck due to the small ground clearance of the whole vehicle, and can set the power input box at the top or the rear end of the shell according to the needs, so that the installation of the gearbox does not affect the crawler-type harvester itself. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure diagram of the high ground clearance zero turning gearbox.

[0021] Figure 2 It is a shell structure diagram of the high ground clearance zero turning gearbox.

[0022] Figure 3 It is a front view sectional view of the high ground clearance zero turning gearbox.

[0023] Figure 4 For the utility model discloses a high ground clearance zero turn gearbox Figure 3 The enlarged view of the middle A place;

[0024] Figure 5 For the utility model discloses a high ground clearance zero turn gearbox Figure 3 The enlarged view of the middle B place;

[0025] Figure 6 For the utility model discloses a high ground clearance zero turn gearbox Control mechanism structure diagram;

[0026] Figure 7 For the utility model discloses a high ground clearance zero turn gearbox Control mechanism part structure's cut drawing;

[0027] In the drawing: 1, shell;2, front cover plate;3, power input box;4, power input shaft;5, first cover plate;6, control mechanism;7, first fixed cylinder;8, second fixed cylinder;9, first extension shell;10, second extension shell;11, first output cylinder;12, first output shaft;13, second output cylinder;14, second output shaft;15, input gear;16, walking pump shaft;17, first gear;18, walking motor shaft;19, output gear;20, fixed shaft;21, adjusting shaft;22, second gear;23, third gear;24, first transmission shaft;25, second transmission shaft;26, first transmission gear;27, second transmission gear;28, drive wheel;29, nut;30, fixed box;31, hydraulic cylinder;32, movable rod;33, mounting cylinder;34, first pressure sensor;35, second pressure sensor;36, lug;37, sliding slot;38, second cover plate. Specific implementation

[0028] In order to make the technical means, creation features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific implementation manners.

[0029] Please refer to Figures 1 to 7This utility model provides a technical solution: a high ground clearance zero-turn gearbox, including a housing 1 and a control mechanism 6 disposed inside it. A first fixed cylinder 7 and a second fixed cylinder 8 are bolted to both sides of the bottom end of the housing 1. A first extension shell 9 and a second extension shell 10 are bolted to one end of the first fixed cylinder 7 and the second fixed cylinder 8, respectively. A first output cylinder 11 and a second output cylinder 13 are bolted to one side of the bottom end of the first extension shell 9 and the second extension shell 10. A power input box 3 is fixedly disposed at the top of the housing 1. The control mechanism 6 includes a fixed shaft 20, an adjusting shaft 21, and an adjusting mechanism. The fixed shaft 20 is disposed inside the housing 1, and one end of the fixed shaft 20 is slidably mounted inside one end of the adjusting shaft 21. An installation cylinder 33 is slidably mounted on the outer side of the other end of the adjustment shaft 21. Two second gears 22 and a third gear 23 are alternately fixedly mounted on the outer side of the other end of the adjustment shaft 21. The adjustment mechanism includes a fixed box 30 and a movable rod 32. A hydraulic cylinder 31 is fixedly installed at one end of the fixed box 30. One end of the hydraulic cylinder 31 is rotatably mounted inside the other end of the adjustment shaft 21. The height of the housing 1 can be increased by the first extension shell 9 and the second extension shell 10, thereby increasing the ground clearance of the tracked harvester and preventing the vehicle from getting stuck due to the small ground clearance. Furthermore, the control mechanism 6 can synchronously control the first output shaft 12 and the second output shaft 14 or control them individually, enabling the tracked harvester to make zero turns and execute control, which is convenient for harvesting operations in small spaces in hilly areas.

[0030] In this embodiment, the power input box 3 is fixedly installed on the rear side of the top of the housing 1. Inside the power input box 3, a power input shaft 4 is rotatably mounted via a bearing. An input gear 15 is fixedly installed at the inner end of the power input shaft 4. The other end of the power input shaft 4 is located on the outer side of the power input box 3. A travel pump shaft 16 is rotatably mounted on the bottom of the power input shaft 4, corresponding to the inner side of the power input box 3, via a bearing. A first gear 17 is fixedly mounted on the outer side of the travel pump shaft 16. The first gear 17 meshes with the input gear 15 and is arranged parallel to it. The walking pump shaft 16 has a first mounting hole inside one end. The power input box 3 has a first through hole on its side wall corresponding to the first mounting hole. The mounting position of the power input box 3 can be adjusted as needed to avoid the gearbox affecting the tracked harvester. The power input shaft 4 can be connected to the power equipment, and the walking pump shaft 16 can be rotated and adjusted through the power input shaft 4, input gear 15, and first gear 17. The first mounting hole and the first through hole can be used to fix the walking pump shaft 16 to the walking pump shaft rod, which facilitates the drive control of the walking pump.

[0031] In this embodiment, a travel motor shaft 18 is rotatably mounted inside the upper end of the housing 1 via a bearing. Output gears 19 are fixedly mounted at both ends of the travel motor shaft 18. A second mounting hole is provided at one end of the travel motor shaft 18. A second through hole is provided on the outer wall of the housing 1 corresponding to the second mounting hole. The travel motor shaft 18 is positioned above the adjusting shaft 21. The two output gears 19 mesh with and are parallel to the second gear 22. The fixed box 30 is fixedly mounted on the outer wall of the housing 1. The movable rod 32 is fixedly mounted at the end of the output rod of the hydraulic cylinder 31. The adjusting shaft 21 is located inside the fixed box 30. The hydraulic cylinder 31 is located outside the housing 1. The fixed box 30... A first pressure sensor 34 is fixedly installed on the inner wall of one side, corresponding to the top and bottom of the movable rod 32. A bearing is installed on the outer side of the mounting cylinder 33, and the bearing is fixedly installed inside the housing 1. A front cover plate 2 is fixedly installed on the front end face of the housing 1 by bolts. One end of the mounting cylinder 33 is movably installed inside the fixed box 30. Protrusions 36 are symmetrically fixed on both sides of the inner wall of one end of the mounting cylinder 33. A sliding groove 37 is opened on the outer wall of the other end of the adjusting shaft 21 at the position corresponding to the protrusion 36. The protrusion 36 is slidably installed inside the sliding groove 37. A first cover plate 5 is fixedly installed on one end of the fixed shaft 20. The first cover plate 5 is fixedly installed on the outer wall of the lower end of the housing 1 by bolts. The fixed shaft 20... A second pressure sensor 35 is symmetrically fixed at the other end of the 0. The second pressure sensor 35 is located inside one end of the adjusting shaft 21. The second mounting hole and the second through hole facilitate the fixed connection between the travel motor shaft 18 and the travel motor shaft. The travel pump drives and controls the travel motor, facilitating the rotation adjustment of the travel motor shaft 18. Since the output gear 19 and the second gear 22 are meshed, the travel motor 18, output gear 19, and second gear 22 facilitate the rotation of the adjusting shaft 21. The adjusting shaft 21, through the meshing of the third gear 23 and the fourth gear, drives the first transmission shaft 24 and the second transmission shaft 25 to rotate and adjust. The hydraulic cylinder 31 drives the movable rod 32 to move laterally. The movable rod 32 can drive the adjusting shaft 21 to slide within the mounting cylinder 33 via the protrusion 36 and the sliding groove 37. One end of the fixed shaft 20 slides within one end of the adjusting shaft 21. The first pressure sensor 34 and the second pressure sensor 35 respectively detect the pressure between the adjusting shaft 21 and the fixed housing 30, and the pressure between the adjusting shaft 21 and the fixed shaft 20. This facilitates lateral movement of the adjusting shaft 21, allowing the second gear 22 to simultaneously mesh with the output gear 19, or for each of the two second gears 22 to mesh with one of the two output gears 19 individually. This facilitates subsequent independent driving of the first transmission shaft 24 or the second transmission shaft 25, and subsequent independent driving of one side of the track.This allows the tracked harvester to achieve zero-steering, facilitating harvesting operations in hilly terrain; the first cover plate 5 also facilitates the installation of the control mechanism 6.

[0032] In this embodiment, a first drive shaft 24 and a second drive shaft 25 are rotatably mounted inside the first fixed cylinder 7 and the second fixed cylinder 8 via bearings installed inside them, respectively. A fourth gear is fixedly mounted at one end of each of the first drive shafts 24 and 25, corresponding to the interior of the housing 1. The fourth gears on both sides mesh with two third gears 23 and are arranged parallel to each other. A first drive gear 26 is fixedly mounted on the outer side of the other end of the first drive shafts 24 and 25, corresponding to the interior of the first extension housing 9 and the second extension housing 10, respectively. A first output shaft 12 and a second output shaft 14 are rotatably mounted inside the first output cylinder 11 and the second output cylinder 13 via bearings, respectively. A second drive gear 27 is fixedly mounted at one end of each of the first and second output shafts 12 and the second extension housing 10, corresponding to the interior of the first extension housing 9 and the second extension housing 10. The first drive gear 26 and the second drive gear 27 mesh with each other. The first output cylinder 11... A second cover plate 38 is sealed and installed on one end of the second output cylinder 13, corresponding to the outer side of the first output shaft 12 and the second output shaft 14, and is fixed with bolts. A drive wheel 28 is installed on the outer end of the first output shaft 12 and the second output shaft 14. A nut 29 is screwed and fixed on the outer side of the drive wheel 28 corresponding to the first output shaft 12 and the second output shaft 14. The first transmission shaft rod 24 and the second transmission shaft rod 25 can drive and control the first output shaft 12 and the second output shaft 14 respectively through the first transmission gear 26 and the second transmission gear 27. The drive wheel 28 can be fixedly installed on the end of the first output shaft 12 and the second output shaft 14 through the nut 29, so that the drive wheel 28 can be driven to rotate through the first output shaft 12 and the second output shaft 14, which facilitates the driving of the track through the drive wheel 28 and facilitates the movement of the tracked harvester. The height of the housing 1 can be increased by the first extension shell 9 and the second extension shell 10, which increases the ground clearance of the tracked harvester and avoids getting stuck due to the small ground clearance.

[0033] Using this high-clearance, zero-turn gearbox, a travel pump and a travel motor are fixedly mounted on the left outer wall of housing 1. The shaft of the travel pump is inserted into the first through hole and the second mounting hole, thus fixing the shaft of the travel pump to the travel pump shaft 16. The shaft of the travel motor is inserted into the second through hole and the second mounting hole, thus fixing the shaft of the travel motor to the travel motor shaft 18. According to the design requirements of the tracked harvester, the power input box 3 is fixed to the top of housing 1 or to its rear end. Housing 1 is mounted on and fixed to the rear end of the tracked harvester frame. The drive wheel 28 is fixedly mounted to the ends of the first output shaft 12 and the second output shaft 14 by nuts 29. The power input shaft 4 is fixedly connected to the power equipment. The travel pump and travel motor are fixedly connected by a pipe. The power equipment drives the power input shaft 4 to rotate. The power input shaft 4 drives the travel pump shaft 16 to rotate through the meshing of the input gear 15 and the first gear 17, and drives the travel pump to operate through the travel pump shaft 16. The travel pump controls the travel motor to operate. The travel motor drives the output gear 19 to rotate through the travel motor shaft 18. Through the meshing of the two output gears 19 and the two second gears 22, the adjusting shaft 21 can be driven to rotate. At this time, neither the first pressure sensor 34 nor the second pressure sensor 35 detects pressure. The adjusting shaft 21 can drive the first transmission shaft 24 and the second transmission shaft 25 to rotate in the same direction through the meshing of the third gear 23 and the fourth gear. The driving shaft 24 and the second transmission shaft 25 drive the first output shaft 12 and the second output shaft 14 to rotate synchronously through the meshing of the first transmission gear 26 and the second transmission gear 27. This facilitates the synchronous operation of the tracks on both sides by driving the drive wheel 28 to rotate, enabling the tracked harvester to travel straight. This eliminates the problem of asynchronous track movement caused by differences in volumetric efficiency between the travel pump and the travel motor, reducing the need for frequent adjustments to the travel direction and simplifying the control of the tracked harvester to travel straight, thus reducing the workload of the operator. When a left turn is required, the hydraulic cylinder 31 is activated. The hydraulic cylinder 31 drives the movable rod 32 to move to the left, which in turn drives the adjusting shaft 21 to move to the left inside the housing 1. Simultaneously, one end of the adjusting shaft 21 is inside the mounting cylinder 33. The slide block 36 slides inside the slide groove 37. One end of the adjusting shaft 21 approaches the first pressure sensor 34 and presses it. At this time, the output gear 19 separates from the second gear 22 on the left and the third gear 23 on the left separates from the fourth gear on the right. The first output shaft 12 is de-energized, while the output gear 19 and the second gear 22 on the right mesh with each other, and the third gear 23 and the fourth gear on the right mesh with each other. The second output shaft 14 continues to rotate. Similarly, the adjusting shaft 21 is adjusted to the right by the hydraulic cylinder 31, and the pressure is detected by the second pressure sensor 35, so that the first output shaft 12 rotates, while the second output shaft 14 is de-energized and can turn right and achieve zero turning, which is convenient for harvesting operations in hilly areas.The first pressure sensor 34 and the second pressure sensor 35 are both model MS5803-14BA.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high ground clearance zero-turn gearbox, comprising a housing (1) and a control mechanism (6) disposed therein, characterized in that, The bottom of the housing (1) is bolted to both sides with a first fixed cylinder (7) and a second fixed cylinder (8). One end of the first fixed cylinder (7) and the second fixed cylinder (8) is bolted to a first extension shell (9) and a second extension shell (10). The bottom of the first extension shell (9) and the second extension shell (10) is bolted to one side with a first output cylinder (11) and a second output cylinder (13). The top of the housing (1) is fixed with a power input box (3). The control mechanism (6) includes a fixed shaft (20), an adjusting shaft (21), and an adjusting mechanism. The rod (20) is located inside the housing (1). One end of the fixed shaft rod (20) is slidably installed inside one end of the adjusting shaft rod (21). The outer side of the other end of the adjusting shaft rod (21) is slidably installed with a mounting cylinder (33). Two second gears (22) and third gears (23) are alternately fixedly installed on the outer side of the other end of the adjusting shaft rod (21). The adjusting mechanism includes a fixed box (30) and a movable rod (32). One end of the fixed box (30) is fixedly provided with a hydraulic cylinder (31). One end of the hydraulic cylinder (31) is rotatably installed inside the other end of the adjusting shaft rod (21).

2. The high ground clearance zero-turn gearbox according to claim 1, characterized in that: The power input box (3) is fixedly installed on the rear side of the top of the housing (1). The power input box (3) has a power input shaft (4) rotatably installed inside through the installed bearing. The inner end of the power input shaft (4) is fixedly provided with an input gear (15). The other end of the power input shaft (4) is located on the outside of the power input box (3).

3. A high ground clearance zero-turn gearbox according to claim 2, characterized in that: The bottom of the power input shaft (4) is rotatably mounted on the inner side of the power input box (3) via a bearing. A first gear (17) is fixedly mounted on the outer side of the power input shaft (16). The first gear (17) meshes with the input gear (15) and is arranged in parallel. A first mounting hole is opened inside one end of the power input shaft (16). A first through hole is opened on the side wall of the power input box (3) at the position corresponding to the first mounting hole.

4. A high ground clearance zero-turn gearbox according to claim 1, characterized in that: The upper end of the housing (1) is rotatably mounted with a walking motor shaft (18) through a bearing. Output gears (19) are fixedly mounted at both ends of the walking motor shaft (18). A second mounting hole is provided at one end of the walking motor shaft (18). A second through hole is provided on the outer wall of the housing (1) at the position corresponding to the second mounting hole.

5. A high ground clearance zero-turn gearbox according to claim 4, characterized in that: The walking motor shaft (18) is located above the adjusting shaft (21), the two output gears (19) mesh with the second gear (22) and are arranged in parallel, the fixed box (30) is fixedly installed on the outer wall of the housing (1), the movable rod (32) is fixedly installed at the end of the output rod of the hydraulic cylinder (31), and the adjusting shaft (21) is located inside the fixed box (30).

6. A high ground clearance zero-turn gearbox according to claim 5, characterized in that: The hydraulic cylinder (31) is located on the outside of the housing (1). A first pressure sensor (34) is fixedly installed on the inner wall of one side of the fixed box (30) at the top and bottom of the movable rod (32). A bearing is installed on the outside of the mounting cylinder (33). The bearing is fixedly installed inside the housing (1). A front cover plate (2) is fixedly installed on the front end face of the housing (1) by bolts.

7. A high ground clearance zero-turn gearbox according to claim 6, characterized in that: One end of the mounting cylinder (33) is movably disposed inside the fixed box (30). The inner walls of one end of the mounting cylinder (33) are symmetrically fixed with protrusions (36). The outer wall of the other end of the adjusting shaft (21) is provided with a groove (37) corresponding to the position of the protrusion (36). The protrusion (36) is slidably installed inside the groove (37).

8. A high ground clearance zero-turn gearbox according to claim 7, characterized in that: One end of the fixed shaft (20) is fixedly provided with a first cover plate (5), which is fixedly installed on the outer wall of the lower end of the housing (1) by bolts. The other end of the fixed shaft (20) is symmetrically provided with a second pressure sensor (35), which is located on the inner side of one end of the adjusting shaft (21).

9. A high ground clearance zero-turn gearbox according to claim 1, characterized in that: The first fixed cylinder (7) and the second fixed cylinder (8) are respectively rotatably mounted with a first transmission shaft (24) and a second transmission shaft (25) through bearings installed inside them. One end of the first transmission shaft (24) and the second transmission shaft (25) is fixedly provided with a fourth gear inside the housing (1). The fourth gears on both sides are respectively meshed with two third gears (23) and arranged in parallel. The outer side of the other end of the first transmission shaft (24) and the second transmission shaft (25) is fixedly installed with a first transmission gear (26) inside the first extension shell (9) and the second extension shell (10).

10. A high ground clearance zero-turn gearbox according to claim 9, characterized in that: The first output cylinder (11) and the second output cylinder (13) are respectively rotatably mounted with bearings. A second transmission gear (27) is fixedly installed at one end of the first output shaft (12) and the second output shaft (14) corresponding to the inside of the first extension shell (9) and the second extension shell (10). The first transmission gear (26) and the second transmission gear (27) are meshed with each other. A second cover plate (38) is sealed and fixed at one end of the first output cylinder (11) and the second output cylinder (13) corresponding to the outside of the first output shaft (12) and the second output shaft (14) by bolts. A drive wheel (28) is installed at the outer end of the first output shaft (12) and the second output shaft (14). A nut (29) is screwed and fixed on the outer side of the drive wheel (28) corresponding to the first output shaft (12) and the second output shaft (14).

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