A multi-functional agricultural vehicle

Abstract

The utility model relates to agricultural implement technical field, concretely relates to a multifunctional agricultural vehicle, including the frame, the front end of frame is provided with the bucket subassembly, the rear end of frame is provided with the ploughing subassembly, the bottom of frame is provided with the steering assembly, the steering assembly includes the chassis, the top center of chassis is installed with the differential mechanism, the both sides of differential mechanism are rotatably connected with the half axle, the input end of half axle is fixedly connected with the bevel gear, the surface of half axle is fixedly connected with the drive sprocket, the surface of drive sprocket is engaged with the drive chain. The utility model sets up the steering assembly, reaches the zero radius of in situ, solves the difficult problem that the slope, the narrow road cannot steer, sets up the bucket subassembly and the ploughing subassembly, the bucket body and disc plough can complete installation and disassembly fast, can install the spanner etc. other extension tools after unloading, and the expansibility is better, and it is more convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology, specifically relating to a multi-functional agricultural vehicle. Background Technology

[0002] Agricultural vehicles are a general term for cargo vehicles that meet the requirements for agricultural transportation. They include vehicles specifically designed for agriculture and modified special vehicles. They adopt diesel engines, four-wheel drive, high ground clearance and wide tires to enhance passability, and are equipped with multi-speed gearboxes and power output devices. They can be adapted to tank, box and other special-purpose cargo boxes.

[0003] Existing agricultural vehicles have a large turning radius, requiring multiple forward and backward maneuvers to turn around in the field. They are difficult to turn around in small spaces, making them inconvenient to use. Furthermore, existing agricultural vehicles only have a single function and lack integration, making them unsuitable for replacement as needed. Therefore, we propose a multi-functional agricultural vehicle. Utility Model Content

[0004] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a multi-functional agricultural vehicle to solve the problems mentioned in the background art, such as the large turning radius of existing agricultural vehicles, the need for multiple forward and backward movements to turn around in the field, the difficulty in turning around in small spaces, the inconvenience of use, and the fact that existing agricultural vehicles only have a single function, poor integration, and cannot be replaced as needed.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A multi-functional agricultural vehicle includes a frame. A bucket assembly is located at the front end of the frame. The bucket assembly includes two sets of hydraulic rods. A slide rail is fixedly connected to one side of each hydraulic rod. A slide rail is slidably connected inside the slide rail. A connecting rod is fixedly connected to one side of the top of the slide rail. A fixing plate is fixedly connected to the front end of the connecting rod. A rotating rod is rotatably fixedly connected inside the fixing plate. A sprocket is fixedly connected to the surface of the rotating rod. A chain engages with the surface of the sprocket. A slider is slidably connected inside the slide rail. A mounting frame is fixedly connected to the surface of the slider. A hydraulic rod is rotatably connected to the top of the mounting frame. A bucket body is mounted on the surface of the mounting frame. A mounting block is fixedly connected to the surface of the mounting frame. A plowing assembly is located at the rear end of the frame. The plowing assembly includes a connecting plate. A disc plow is rotatably connected to the surface of the connecting plate. A fixing frame is fixedly connected to the top of the connecting plate. A hydraulic rod is fixedly connected to the surface of the fixing frame. A hydraulic rod is fixedly connected to the top of the disc plow. The vehicle is connected by a connecting block. A steering assembly is located at the bottom of the frame. The steering assembly includes a chassis. A differential is mounted at the top center of the chassis. Half-shafts are rotatably connected to both sides of the differential. Bevel gears are fixedly connected to the input ends of the half-shafts. A drive sprocket is fixedly connected to the surface of the half-shaft, and a drive chain meshes with the surface of the drive sprocket. A driven shaft is rotatably connected to the rear end of the chassis. Wheels are fixedly connected to the surfaces of the half-shafts and the driven shaft. A steering wheel is mounted at the front end of the chassis. A [missing information - likely a component or component] is fixedly connected to the bottom of the steering wheel. A semi-circular cam is provided, with front steering rocker arms rotatably connected to both sides of the semi-circular cam. A steering tie rod is hinged to the surface of the front steering rocker arm, and a rear steering rocker arm is hinged to the other end of the steering tie rod. Sliding grooves are provided on both sides of the semi-circular cam, and push arms are slidably connected inside the sliding grooves. A steering brake oil pump is fixedly connected between the push arms and the differential. An oil pipe is fixedly connected to the output end of the steering brake oil pump, and two sets of steering brake slave cylinders are fixedly connected to the end of the oil pipe. A steering brake disc is fixedly connected between the two sets of steering brake slave cylinders.

[0006] Preferably, two sets of hydraulic rods are symmetrically fixedly connected to the top front end of the vehicle frame, and two sets of slide rails are symmetrically arranged. Both slide rails are C-shaped. The slide rail is fixedly connected to the output end of the hydraulic rod by bolts and connecting rods. The two ends of the chain are fixedly connected to the top front end of the vehicle frame and the top of the slider, respectively. The bucket body is rotatably connected to the mounting frame and the hydraulic rod.

[0007] Preferably, the connecting block is rotatably connected to the output end of the hydraulic rod three, the disc plow is a rotatable structure on both the connecting plate and the hydraulic rod three, and the hydraulic rod one, the hydraulic rod two, and the hydraulic rod three are all connected to a hydraulic valve.

[0008] Preferably, the steering wheel is vertically mounted on the front side of the chassis, the output shaft of the steering wheel is engaged with the keyway of the center hole of the semi-circular cam, the stepped profile surface of the semi-circular cam contacts the roller bearing of the front steering rocker arm, the front steering rocker arm is hinged to one end of the steering tie rod by a pin, the other end of the steering tie rod is connected to the rear steering rocker arm by a ball joint hinge, the sliding pin of the rear steering rocker arm is embedded in the guide rail of the slide groove, and the slide groove is formed in the side beam of the chassis.

[0009] Preferably, the eccentric convex angle of the semi-circular cam contacts the roller of the push arm, the piston rod of the push arm abuts against the oil inlet valve of the steering brake oil pump, the steering brake oil pump is connected to the oil inlet of the steering brake slave pump through the oil pipe thread, and the piston rod of the steering brake slave pump is perpendicularly pressed against the friction pad of the steering brake disc.

[0010] Preferably, the differential housing is bolted to the longitudinal beam of the chassis, the output spline shaft of the differential is engaged with the input end of the half shaft, the bevel gear at the output end of the half shaft meshes with the crown gear of the bevel gear, the output shaft of the bevel gear is interference-fitted with the hub of the drive sprocket, the drive sprocket meshes with the driven shaft through the drive chain, and the flanges at both ends of the driven shaft are connected to the hub bearings of the wheels.

[0011] Preferably, the steering brake disc is coaxially sleeved on the driven shaft near the journal of the wheel, the push arm and the steering brake oil pump are arranged in a straight line on the engine compartment bulkhead of the chassis, and the guide rail of the slide is parallel to the longitudinal centerline of the chassis.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This multi-functional agricultural vehicle is equipped with a steering assembly. When the steering wheel is turned slightly, the innovative structure of the steering and braking system linked by the semi-circular cam triggers the steering tie rod to drive the wheel to turn and the push arm to trigger the hydraulic brake to lock the power on one side. Combined with the torque distribution mechanism of the differential, small-angle steering is achieved. When the steering wheel is turned significantly, the steering brake disc completely locks the drive chain on one side, and the differential distributes the power to the other wheel, driving the other wheel to reverse, achieving zero-radius turn on the spot. This solves the problem of not being able to turn on slopes and narrow roads. The steering brake oil pump responds to the angular displacement of the semi-circular cam. When the steering angle is small, it outputs low-pressure oil, providing only slight braking to assist steering. When the steering angle is large, it outputs high-pressure oil, completely locking the drive chain on one side.

[0014] 2. This multi-functional agricultural vehicle is equipped with a bucket assembly and a plowing assembly. The bucket body is connected to the mounting frame via a pin, allowing for quick installation and disassembly. After removing the bucket body, other extension tools such as forks can be installed on the mounting frame or mounting block. The disc plow is connected to the connecting plate via a pin and is also fixed to the hydraulic rod via the plug-in flange of the connecting block, which also allows for quick installation and disassembly. It supports replacement with rotary tillers, furrowing plows, and other agricultural implements, offering good expandability and ease of use. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is a side view of the structure of this utility model;

[0017] Figure 3 This is an exploded view of the structure of the bucket assembly of this utility model;

[0018] Figure 4 This is a three-dimensional structural schematic diagram of the plowing component of this utility model;

[0019] Figure 5 This is a top sectional view of the steering assembly of this utility model.

[0020] In the diagram: 1. Frame; 2. Bucket assembly; 21. Hydraulic rod one; 22. Slide rail one; 23. Slide rail two; 24. Connecting rod; 25. Fixing plate; 26. Rotating rod; 27. Sprocket one; 28. Chain one; 29. ​​Slider; 210. Mounting frame; 211. Hydraulic rod two; 212. Bucket body; 213. Mounting block; 3. Plowing assembly; 31. Connecting plate; 32. Disc plow; 33. Fixing frame; 34. Hydraulic rod three; 35. Connecting block; 4. 41. Steering assembly; 42. Chassis; 43. Differential; 44. Half shaft; 45. Bevel gear; 46. Drive sprocket; 47. Drive chain; 48. Driven shaft; 49. Wheel; 410. Steering wheel; 411. Semi-circular cam; 412. Front steering rocker arm; 413. Steering tie rod; 414. Rear steering rocker arm; 415. Slide rail; 416. Push arm; 417. Steering brake pump; 418. Oil pipe; 419. Steering brake caliper; 410. Steering brake disc. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 One embodiment provided by this utility model:

[0023] A multi-functional agricultural vehicle includes a frame 1. A bucket assembly 2 is located at the front end of the frame 1. The bucket assembly 2 includes two sets of hydraulic rods 21. A slide rail 22 is fixedly connected to one side of the hydraulic rod 21. A slide rail 23 is slidably connected inside the slide rail 22. A connecting rod 24 is fixedly connected to one side of the top of the slide rail 23. A fixing plate 25 is fixedly connected to the front end of the connecting rod 24. A rotating rod 26 is rotatably fixedly connected inside the fixing plate 25. A sprocket 27 is fixedly connected to the surface of the rotating rod 26. A chain 28 is meshed on the surface of the sprocket 27. A slider 29 is slidably connected inside the slide rail 23. A mounting frame 210 is fixedly connected to the surface of the slider 29. A hydraulic rod 211 is rotatably connected to the top of the mounting frame 210. The frame 1 is equipped with a bucket body 212. A mounting block 213 is fixedly connected to the surface of the mounting bracket 210. A ploughing assembly 3 is located at the rear end of the frame 1. The ploughing assembly 3 includes a connecting plate 31. A disc plow 32 is rotatably connected to the surface of the connecting plate 31. A fixing frame 33 is fixedly connected to the top of the connecting plate 31. A hydraulic rod 34 is fixedly connected to the surface of the fixing frame 33. A connecting block 35 is fixedly connected to the top of the disc plow 32. A steering assembly 4 is located at the bottom of the frame 1. The steering assembly 4 includes a chassis 41. A differential 42 is mounted at the top center of the chassis 41. Half-shafts 43 are rotatably connected to both sides of the differential 42. A bevel gear 44 is fixedly connected to the input end of the half-shaft 43. A drive sprocket 45 is fixedly connected to the surface of the half-shaft 43. The surface of the drive sprocket 45 is meshed with... A drive chain 46 is provided. A driven shaft 47 is rotatably connected to the rear end of the chassis 41. A wheel 48 is fixedly connected to the surface of the half-shaft 43 and the driven shaft 47. A steering wheel 49 is mounted on the front end of the chassis 41. A semi-circular cam 410 is fixedly connected to the bottom of the steering wheel 49. Front steering rocker arms 411 are rotatably connected to both sides of the semi-circular cam 410. A steering tie rod 412 is hinged to the surface of the front steering rocker arm 411. A rear steering rocker arm 413 is hinged to the other end of the steering tie rod 412. Slide grooves 414 are provided on both sides of the semi-circular cam 410. A push arm 415 is slidably connected inside the slide groove 414. A steering brake oil pump 416 is fixedly connected between the push arm 415 and the differential 42. An oil pipe 417 is fixedly connected to the output end of the steering brake oil pump 416. Two sets of steering brake calipers 418 are fixedly connected to the end of 17, and a steering brake disc 419 is fixedly connected between the two sets of steering brake calipers 418. A steering assembly 4 is provided. When the steering wheel 49 is turned slightly, the innovative structure of the steering and braking systems is linked by the semi-circular cam 410. A single operation of the steering wheel 49 synchronously triggers the steering tie rod 412 to drive the wheel 48 to turn and the push arm 415 to trigger the hydraulic brake to lock the power on one side. Combined with the torque distribution mechanism of the differential 42, small-angle steering is achieved. When the steering wheel 49 is turned significantly, the steering brake disc 419 completely locks the drive chain 46 on one side, and the differential 42 distributes the power to the other wheel 48, driving the other wheel 48 to reverse, achieving a zero-radius turn on the spot, solving the problem of not being able to turn on slopes and narrow roads.The steering brake pump 416 responds to the angular displacement of the semi-circular cam 410. When the steering angle is small, it outputs low-pressure hydraulic fluid for slight braking and steering assistance; when the steering angle is large, it outputs high-pressure hydraulic fluid to completely lock the single-sided drive chain. It includes a bucket assembly 2 and a plowing assembly 3. The bucket body 212 is connected to the mounting bracket 210 via a pin, allowing for quick installation and removal. After removing the bucket body 212, other extension tools such as forks can be installed on the mounting bracket 210 or mounting block 213. The disc plow 32 is connected to the connecting plate 31 via a pin and fixed to the hydraulic rod 34 via the plug-in flange of the connecting block 35, also allowing for quick installation and removal. It supports replacement with rotary tillers, furrowing plows, and other implements, offering good expandability and ease of use.

[0024] Furthermore, two sets of hydraulic rods 21 are symmetrically fixedly connected to the top front end of the frame 1, and two sets of slide rails 22 are symmetrically arranged. Both slide rails 22 and slide rail 23 are C-shaped. Slide rail 23 is fixedly connected to the output end of hydraulic rod 21 through the cooperation of bolts and connecting rod 24. The two ends of chain 28 are fixedly connected to the top front end of the frame 1 and the top of the slider 29, respectively. The bucket body 212 is rotatably connected to the mounting frame 210 and hydraulic rod 211, respectively. The C-shaped nested structure of slide rails 22 and slide rail 23 achieves bidirectional anti-torsion through side slotting to prevent the slide rail from deforming when the bucket body 212 is under uneven load. The cooperation between chain 28 and sprocket 27 ensures that the slider 29 slides without jamming.

[0025] Furthermore, the connecting block 35 is rotatably connected to the output end of the hydraulic rod 34. The disc plow 32 is a rotatable structure on both the connecting plate 31 and the hydraulic rod 34. The hydraulic rod 21, hydraulic rod 211, and hydraulic rod 34 are all connected to the hydraulic valve. A disc spring pre-tightening structure is provided at the rotatable connection between the disc plow 32 and the connecting plate 31 to avoid damage to the plow blade when it encounters rocks through elastic buffering. The angle of the disc plow 32 can be adjusted by the hydraulic rod 34.

[0026] Furthermore, the steering wheel 49 is vertically mounted on the front side of the chassis 41. The output shaft of the steering wheel 49 is engaged with the keyway of the center hole of the semi-circular cam 410. The stepped profile surface of the semi-circular cam 410 contacts the roller bearing of the front steering rocker arm 411. The front steering rocker arm 411 is hinged to one end of the steering tie rod 412 via a pin. The other end of the steering tie rod 412 is connected to the rear steering rocker arm 413 via a ball joint hinge. The sliding pin of the rear steering rocker arm 413 is embedded in the guide rail of the slide groove 414. The slide groove 414 is opened on the side beam of the chassis 41. The stepped profile surface of the semi-circular cam 410 and the roller bearing of the front steering rocker arm 411 adopt an inclined involute design, which is converted into rolling friction through line contact, reducing steering force loss.

[0027] Furthermore, the eccentric convex angle of the semicircular cam 410 contacts the roller of the push arm 415, the piston rod of the push arm 415 abuts against the oil inlet valve of the steering brake oil pump 416, the steering brake oil pump 416 is threadedly connected to the oil inlet of the steering brake slave cylinder 418 through the oil pipe 417, the piston rod of the steering brake slave cylinder 418 vertically presses against the friction pad of the steering brake disc 419, the polyurethane roller of the push arm 415 has a built-in damping rubber core, which eliminates the impact noise of the semicircular cam 410 by absorbing vibration, and the piston rod end of the steering brake slave cylinder 418 adopts a fan-shaped friction-enhancing texture to make the friction pad clamping force evenly distributed and avoid local overheating of the brake disc.

[0028] Furthermore, the housing of the differential 42 is bolted to the longitudinal beam of the chassis 41. The output spline shaft of the differential 42 is engaged with the input end of the half-shaft 43. The bevel gear at the output end of the half-shaft 43 meshes with the crown gear of the bevel gear 44. The output shaft of the bevel gear 44 is interference-fitted with the hub of the drive sprocket 45. The drive sprocket 45 meshes with the driven shaft 47 through the drive chain 46. The flanges at both ends of the driven shaft 47 are connected to the hub bearings of the wheel 48. The meshing of the drive chain 46 and the sprocket transmits torque through a double-row roller chain structure to prevent weeds from tangling in the field. Sealed dust covers are added to the flanges at both ends of the driven shaft 47 to prevent mud and sand from entering the hub bearings and extend their service life.

[0029] Furthermore, the steering brake disc 419 is coaxially sleeved on the journal of the driven shaft 47 near the wheel 48. The push arm 415 and the steering brake oil pump 416 are arranged in a straight line on the engine compartment bulkhead of the chassis 41. The guide rail direction of the slide groove 414 is parallel to the longitudinal center line of the chassis 41. The guide rail direction of the slide groove 414 is parallel to the longitudinal center line of the chassis 41, so that the displacement trajectory of the rear steering rocker arm 413 coincides with the steering plane of the wheel 48, eliminating motion interference. The design of the steering brake disc 419 being coaxially sleeved on the driven shaft 47 achieves zero radial runout of the brake disc through the shoulder positioning.

[0030] Working principle: The hydraulic rod 21 rises, causing the slide rail 23 to rise within the slide rail 22. Simultaneously, the rotating rod 26 rises via the fixed plate 25, causing the rotating rod 26 to pull the sprocket 27 to rotate. This, in turn, causes the slider 29 to slide upward within the slide rail 23 via the chain 28, thereby changing the height of the bucket body 212. The angle of the bucket body 212 can be changed by extending or shortening the hydraulic rod 211, and the angle of the disc plow 32 can be changed by extending or shortening the hydraulic rod 34. The bucket body 212 is connected to the mounting frame 210 via a pin. After removing the bucket body 212, other extension tools such as forks can be installed on the mounting frame 210 or mounting block 213. The disc plow 32 is connected to the connecting plate 31 via a pin. The connection is made by plugging the flange of the connecting block 35 and fixing it to the hydraulic rod 34. It supports the replacement of agricultural implements such as rotary tillers and furrowing plows. Turning the steering wheel 49 drives the semi-circular cam 410 to rotate. Its stepped surface moves the front steering rocker arm 411, which pulls the rear steering rocker arm 413 through the steering tie rod 412, thereby driving the wheel 48 to deflect for steering. The semi-circular cam 410 deflects at an angle and presses the push arm 415, causing the piston rod of the push arm 415 to trigger the steering brake oil pump 416. Hydraulic oil is delivered to the steering brake slave cylinder 418 through the oil pipe 417, so that the slave cylinder piston presses the steering brake disc 419, locking the steering brake disc 419 and cutting off the power on one side. The differential 42 distributes the torque to the other wheel 48, and the reverse wheel 48 reverses to achieve small-radius steering.

[0031] It will be apparent to those skilled in the art that this invention 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 essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-functional agricultural vehicle, comprising a frame (1), characterized in that: The front end of the frame (1) is provided with a bucket assembly (2). The bucket assembly (2) includes two sets of hydraulic rods (21). A slide rail (22) is fixedly connected to one side of the hydraulic rod (21). A slide rail (23) is slidably connected inside the slide rail (22). A connecting rod (24) is fixedly connected to the top side of the slide rail (23). A fixing plate (25) is fixedly connected to the front end of the connecting rod (24). A rotating rod (26) is rotatably fixedly connected inside the fixing plate (25). A sprocket (27) is fixedly connected to the surface of the rotating rod (26). A chain (28) meshes with the surface of the sprocket (27). A slider (29) is slidably connected inside the slide rail (23). (29) has a mounting bracket (210) fixedly connected to its surface. A hydraulic rod (211) is rotatably connected to the top of the mounting bracket (210). A bucket body (212) is mounted on the surface of the mounting bracket (210). A mounting block (213) is fixedly connected to the surface of the mounting bracket (210). A plowing assembly (3) is provided at the rear end of the frame (1). The plowing assembly (3) includes a connecting plate (31). A disc plow (32) is rotatably connected to the surface of the connecting plate (31). A fixing bracket (33) is fixedly connected to the top of the connecting plate (31). A hydraulic rod (34) is fixedly connected to the surface of the fixing bracket (33). A connecting block (35) is fixedly connected to the top of the disc plow (32). The frame (1) The bottom of the chassis (41) is provided with a steering assembly (4), which includes a chassis (41). A differential (42) is installed at the top center of the chassis (41). Half shafts (43) are rotatably connected to both sides of the differential (42). A bevel gear (44) is fixedly connected to the input end of the half shaft (43). A drive sprocket (45) is fixedly connected to the surface of the half shaft (43). A drive chain (46) meshes with the surface of the drive sprocket (45). A driven shaft (47) is rotatably connected to the rear end of the chassis (41). A wheel (48) is fixedly connected to the surfaces of the half shaft (43) and the driven shaft (47). A steering wheel (49) is installed at the front end of the chassis (41). The bottom of the steering wheel (49) is fixedly connected to the steering wheel (49). A semi-circular cam (410) is connected to the differential (42). A front steering rocker arm (411) is rotatably connected to both sides of the semi-circular cam (410). A steering tie rod (412) is hinged to the surface of the front steering rocker arm (411), and a rear steering rocker arm (413) is hinged to the other end of the steering tie rod (412). Sliding grooves (414) are provided on both sides of the semi-circular cam (410). A push arm (415) is slidably connected inside the sliding groove (414). A steering brake pump (416) is fixedly connected between the push arm (415) and the differential (42). An oil pipe (417) is fixedly connected to the output end of the steering brake pump (416), and two sets of steering brake slave cylinders (418) are fixedly connected to the end of the oil pipe (417).A steering brake disc (419) is fixedly connected between the two sets of steering brake calipers (418).

2. The multi-functional agricultural vehicle according to claim 1, characterized in that: Two sets of hydraulic rods (21) are symmetrically fixedly connected to the top of the front end of the frame (1). Two sets of slide rails (22) are symmetrically arranged. Both slide rails (22) and slide rails (23) are C-shaped. Slide rails (23) are fixedly connected to the output end of hydraulic rods (21) through the cooperation of bolts and connecting rods (24). The two ends of chain (28) are fixedly connected to the top of the front end of the frame (1) and the top of the slider (29) respectively. The bucket body (212) is rotatably connected to the mounting bracket (210) and hydraulic rods (211) respectively.

3. The multi-functional agricultural vehicle according to claim 1, characterized in that: The connecting block (35) is rotatably connected to the output end of the hydraulic rod three (34). The disc plow (32) is a rotatable structure on both the connecting plate (31) and the hydraulic rod three (34). The hydraulic rod one (21), the hydraulic rod two (211), and the hydraulic rod three (34) are all connected to the hydraulic valve.

4. A multi-functional agricultural vehicle according to claim 1, characterized in that: The steering wheel (49) is vertically mounted on the front side of the chassis (41). The output shaft of the steering wheel (49) is engaged with the keyway of the center hole of the semi-circular cam (410). The stepped profile of the semi-circular cam (410) is in contact with the roller bearing of the front steering rocker arm (411). The front steering rocker arm (411) is hinged to one end of the steering tie rod (412) by a pin. The other end of the steering tie rod (412) is connected to the rear steering rocker arm (413) by a ball joint hinge. The sliding pin of the rear steering rocker arm (413) is embedded in the guide rail of the slide groove (414). The slide groove (414) is opened on the side beam of the chassis (41).

5. A multi-functional agricultural vehicle according to claim 1, characterized in that: The eccentric convex angle of the semicircular cam (410) contacts the roller of the push arm (415), the piston rod of the push arm (415) abuts against the oil inlet valve of the steering brake oil pump (416), the steering brake oil pump (416) is threadedly connected to the oil inlet of the steering brake slave cylinder (418) through the oil pipe (417), and the piston rod of the steering brake slave cylinder (418) presses vertically against the friction pad of the steering brake disc (419).

6. A multi-functional agricultural vehicle according to claim 1, characterized in that: The housing of the differential (42) is bolted to the longitudinal beam of the chassis (41). The output spline shaft of the differential (42) is engaged with the input end of the half shaft (43). The bevel gear at the output end of the half shaft (43) meshes with the crown gear of the bevel gear (44). The output shaft of the bevel gear (44) is interference-fitted with the hub of the drive sprocket (45). The drive sprocket (45) meshes with the driven shaft (47) through the drive chain (46). The flanges at both ends of the driven shaft (47) are connected to the hub bearings of the wheel (48).

7. A multi-functional agricultural vehicle according to claim 1, characterized in that: The steering brake disc (419) is coaxially sleeved on the driven shaft (47) near the journal of the wheel (48). The push arm (415) and the steering brake oil pump (416) are arranged in a straight line on the engine compartment bulkhead of the chassis (41). The guide rail direction of the slide groove (414) is parallel to the longitudinal center line of the chassis (41).

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