CN212588753U - Ultra-low and ultra-short crawler tractor - Google Patents

Abstract

The utility model relates to an ultra-low and ultra-short crawler tractor, which at least comprises an engine, a chassis crawler traveling system, an agricultural implement unit and a hydraulic oil cylinder suspension bracket, wherein the engine is arranged on a large frame of the chassis crawler traveling system, the rear end of the large frame of the chassis crawler traveling system is provided with a gearbox, and the engine is in transmission connection with the gearbox through a V-belt; a receiver and an electromagnetic valve of a manual and remote control system are fixed at the upper end of the gearbox, an operation panel is installed at the rear ends of the receiver and the electromagnetic valve, a left and right steering handle installation seat is installed at the rear end of the operation panel, left and right steering handles are arranged on the left and right steering handle installation seat, a hydraulic oil cylinder suspension bracket is fixed at the rear end of the gearbox, and a clutch operation handle, a gear operation handle and a power output handle of the gearbox extend out of the upper end face of the operation panel; a rotary sleeve of the agricultural implement unit is sleeved on a rotary supporting arm of the gearbox; and a power output shaft of the gearbox is in transmission connection with a power input shaft of the agricultural implement unit through a chain and a chain wheel. Has the characteristics of small volume and the like.

Description

Ultra-low and ultra-short crawler tractor

Technical Field

The utility model relates to a crawler tractor, concretely relates to ultralow ultrashort type crawler tractor. Belongs to the technical field of agricultural machinery.

Background

The existing pepper garden is planted in a hillside or a small land in a large subdivision mode, pepper trees have thorns, plants droop after fruits are grown, the lower portion of the plants is close to the ground, and the space for farming is small.

At present, although a mini-tiller can enter an orchard and be placed under pepper trees, people sometimes need to drill under the trees to be held by hands, and the operation is very inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the bulky problem of agricultural machines commonly used, the utility model aims at: the utility model provides an ultra-low ultrashort type caterpillar tractor, the utility model provides a small, ultrashort convenient turn around, need not hand, the people can not arrive under the tree, can carry out the machines of operations such as rotary tillage, weeding, ditching fertilization in orchard, prickly ash garden and big-arch shelter. The problem of labour shortage is solved to its aim at, improves work efficiency. Another object is to provide an agricultural implement which is convenient for the elderly to operate, safe and labor saving.

In order to achieve the technical purpose, the utility model adopts the following technical scheme to realize:

an ultra-low and ultra-short crawler tractor at least comprises an engine, a chassis crawler traveling system, an agricultural implement unit and a hydraulic oil cylinder suspension bracket, wherein the engine is arranged on a large bracket of the chassis crawler traveling system, a gearbox is arranged on the rear end of the large bracket of the chassis crawler traveling system, and the engine is in transmission connection with the gearbox through a triangular belt; the upper end of the gearbox is fixedly provided with a receiver and an electromagnetic valve of a manual and remote control system, the rear ends of the receiver and the electromagnetic valve are provided with an operating panel, the rear end of the operating panel is fixedly provided with a left and right steering handle mounting seat, the left and right steering handle mounting seat is provided with a left and right steering handle, the rear end of the gearbox is fixedly connected with a hydraulic oil cylinder suspension bracket, and a clutch operating handle, a gear operating handle and a power output handle of the gearbox extend out of the upper end face of the operating panel; the rotary sleeve of the agricultural implement unit is movably sleeved on the rotary supporting arm of the gearbox; and a power output shaft of the gearbox is in transmission connection with a power input shaft of the agricultural implement unit on the same side through a chain and a chain wheel.

The engine is a single-cylinder water-cooled 12-18 horsepower diesel engine.

The chassis crawler traveling system comprises a tensioning bolt, a large frame, a bearing wheel, a tensioning wheel and a rubber crawler, wherein the large frame is welded with a side beam which is a square tube with the diameter of 60mm, the rear end of the square tube with the diameter of 60mm is provided with a plug with a through hole in the middle, and two sides of the plug are provided with fixing nuts, wherein the fixing nuts on the inner side of the plug are welded; a 50mm square tube is movably sleeved in the 60mm square tube, one end, positioned in the 60mm square tube, of the 50mm square tube is welded with square steel with a small pit, a tensioning bolt penetrates through a fixing nut and a plug and abuts against the small pit of the square steel, the other end of the 50mm square tube is welded with a tensioning wheel shaft, and a tensioning wheel is rotatably installed on the tensioning wheel shaft; the bearing wheel shaft of bearing wheel welds in 60mm square below, and the drive wheel of gearbox, bearing wheel and take-up pulley rotate the connection through the rubber track from a left side to the right side.

The manual and remote control system consists of a brake stay wire, a left steering handle, a right steering handle, an electric push rod, a receiver, a remote controller, an electromagnetic valve, a left steering small oil cylinder, a right steering small oil cylinder and a hydraulic oil cylinder;

the receiver and the electromagnetic valve are arranged at the upper end of the gearbox, and the output line of the receiver is respectively connected with the electric push rod and an electromagnetic valve coil wire for left-right steering and lifting of the machine tool; the electric push rod is connected with an accelerator pull rod of the engine; the electromagnetic valve is respectively connected with a hydraulic oil pump of the gearbox, a left steering small oil cylinder, a right steering small oil cylinder and a hydraulic oil cylinder for lifting the agricultural implement unit through oil pipes, the left steering small oil cylinder and the right steering small oil cylinder are arranged on the large frame, and the remote controller is in electric signal connection with the receiver;

the left and right steering small oil cylinder comprises a cylinder body, a piston rod, a return spring, a locking nut and a top ; a piston rod and a return spring are arranged in the cylinder body, the return spring is arranged on the piston rod, the top is arranged at the top of the piston rod through a locking nut, and the locking nut and the top are positioned outside the cylinder body; the lifting hole opening of the top is sleeved on a brake rocker shaft of the gearbox, and the brake rocker shaft is connected with a left steering handle and a right steering handle through brake pull wires.

The gearbox comprises a gearbox body, a clutch shaft, a main shaft, a secondary shaft, a steering shaft, a driving shaft and a power output shaft;

the clutch shaft is movably arranged at the front end of the upper part of the gearbox body, a clutch wheel is sleeved at the left end of the clutch shaft, a hydraulic oil pump is arranged at the right end of the clutch shaft, and the hydraulic oil pump is fixed on the gearbox body; a separation rod connected with a clutch control handle is arranged on the inner side of the clutch wheel; the clutch wheel is in transmission connection with a belt pulley of the engine through a triangular belt; a small gear for power input is fixedly arranged in the middle of the clutch shaft;

the main shaft is arranged in the middle of the upper part of the gearbox body, a main shaft duplicate gear is fixedly arranged at the left end of the main shaft, a large gear and a small gear of the main shaft duplicate gear are normally meshed, a reverse gear sliding gear is movably arranged in the middle of the main shaft, and a 1-3 gear sliding gear is movably arranged at the right end of the main shaft;

the two shafts are arranged in the middle of the upper part of the gearbox body, 2-4 gears of sliding gears are movably arranged at the left ends of the two shafts, a reduction pinion is fixedly arranged in the middle of the two shafts, and a two-shaft duplicate gear is fixedly arranged at the right end of the two shafts; the gear control handle is connected with a reverse gear sliding gear, a 1-3 gear sliding gear and a 2-4 gear sliding gear through a gear shifting fork to realize gear shifting;

the steering shaft is arranged in the middle of the lower part of the gearbox body, differential installation seats are respectively and fixedly arranged on the two inner sides of the gearbox body, a differential assembly is movably arranged between the two differential installation seats, a differential gear large gear is fixedly arranged on the differential assembly, the differential gear large gear and a reduction pinion are constantly meshed, the steering shaft is symmetrically arranged on the two sides of the differential assembly, the reduction gear is fixedly arranged on the steering shaft, the steering shaft extends out of the gearbox body, a steering brake assembly is arranged at the end part of the steering shaft, and the steering brake assembly comprises a brake rocker arm, a brake rocker arm shaft, a brake fixing seat, a brake shoe;

the two driving shafts are respectively and symmetrically distributed on two sides of the lower part of the gearbox body, and one end of each driving shaft, which is positioned on the inner side of the gearbox body, is fixedly provided with a driving large gear; one end of the driving shaft, which is positioned outside the gearbox body, is sleeved with a driving shaft pipe, and the end part of the driving shaft is fixedly provided with a driving wheel; the driving large gear is normally meshed with the reduction gear, and the driving wheel drives the crawler to travel;

the two sides of the rear side of the middle of the gearbox body are symmetrically provided with rotating support arms of the agricultural implement unit, the length of the rotating support arms of the agricultural implement unit can extend out of the rubber track, the rotating support arms of the agricultural implement unit are movably sleeved with rotating sleeves, the middle of the rotating support arm of the agricultural implement unit on the left side of the gearbox body is movably provided with a power output shaft, the power output shaft is movably provided with a power output sliding gear in the gearbox body, and the other side of the power output sliding gear is fixedly provided with a power output chain wheel which transmits power to the agricultural implement unit; the power output handle realizes power output and stop through a shifting fork and a power output sliding gear.

The agricultural implement unit is a rotary cultivator, a weeding machine, a ditching machine or a ditching and fertilizing machine.

The middle of a left side plate and a right side plate of the rotary cultivator are fixedly connected through a connecting girder, a hydraulic cylinder connecting plate with a lifting hole is welded in the middle of the connecting girder and is movably connected with a hydraulic cylinder in a pin shaft mode, the lower ends of the left side plate and the right side plate are respectively and fixedly provided with a bearing seat, a rotary cultivator cutter shaft assembly is rotatably arranged between the two bearing seats, the left side of the rotary cultivator cutter shaft assembly is fixedly provided with a large chain wheel, the upper ends of the left side plate and the right side plate are respectively and fixedly provided with a rotary sleeve, the two rotary sleeves are symmetrically and movably sleeved on a rotary supporting arm of an agricultural implement unit, a power output shaft of a gearbox is fixedly provided with a small chain wheel, the small chain wheel is in transmission connection with the large chain wheel through a chain, a chain box protective cover is fixed on the;

the assembly of the weeding machine and the rotary cultivator is basically the same, and the difference is that a hydraulic cylinder connecting plate is not welded in the middle of a connecting girder, the rotary cultivator cutter shaft assembly is replaced by a weeding machine cutter shaft assembly, the positions of the large chain wheel and the small chain wheel are interchanged and assembled, a weeding machine housing is fixed on the left side plate and the right side plate, and the lower end of the weeding machine housing is fixedly connected with a universal wheel through an aligning base plate;

the assembly of the ditching machine and the rotary cultivator is basically the same, and the difference is that an inverted reduction gear box is fixedly arranged on a left side plate, a large chain wheel and a small gear of the ditching machine are fixed on a ditching power input shaft of the ditching machine, a bearing seat is fixedly arranged on a right side plate, a cutter shaft assembly of the ditching machine is rotatably arranged on the inverted reduction gear box, one end of the cutter shaft assembly of the ditching machine is fixed on the bearing seat, the other end of the cutter shaft assembly of the ditching machine extends into the inverted reduction gear box and is fixedly provided with a large gear of the ditching machine, the large gear of the ditching machine is normally meshed with the small gear of the ditching machine, ditching machine cover shell mounting frames are fixed on the left side plate and the right side plate, and a ditching cover shell and a soil;

the ditching fertilizer applicator and the ditching machine are basically assembled in the same way, but the difference lies in that a ditching housing and a soil scraping plate are taken off and replaced into a fertilizer housing and a fertilizer hopper, a fertilizer flow control system is arranged at the inlet of the fertilizer hopper, and a fertilizer application pipe and a small plough are arranged below the fertilizer hopper.

The utility model has the advantages that: the utility model discloses a overspeed device tensioner that tensioning bolt, tensioning shaft, take-up pulley and the side of adopting in the chassis track traveling system of walking are constituteed, its simple structure, and the space is practiced thrift to the dependable performance, uses short, small diesel engine in addition, makes highly reduce to below 700mm, adopts manual and remote control system, and the during operation need not hand, and the people is not to under the tree, and the operation is accomplished to light pine. The utility model discloses this gearbox is small, simple structure, the gear is many, and is fast, highest speed 4Km/h, especially adapted old person is at mountain area plot ground operation and walking, and 1 shelves are 0.6Km/h very slowly, and this kind of operating speed is to the tractor that the horsepower is little, can open the zanjon, can meticulous operation, and both sides symmetry installation agricultural implement unit rotatory support arm activity suit agricultural implement unit swivel cover, movable mounting power output shaft in the middle of the left side agricultural implement unit rotatory support arm, power output shaft establishes in same one side with agricultural implement unit power input shaft to through chain sprocket drive system with chain sprocket mode transmission connection, this kind of structure, simple structure, the most crucial is short, complete machine length than other mounted frame and power output shaft behind the limit output short 0.5 meters-1 meter, ultrashort, convenient turn around. The structure is solid, durable and cheap.

The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the present invention.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic top view of the chassis crawler travel system of the present invention;

FIG. 3 is a schematic structural view of the manual and remote control system of the present invention;

FIG. 4 is a schematic view of the left and right steering linkage of the left and right steering handlebars of the present invention;

FIG. 5 is a schematic structural view of a left-right steering small cylinder of the present invention;

fig. 6 is a schematic view of a transmission structure of the transmission of the present invention;

FIG. 7 is a schematic view of the rotary cultivator of the present invention;

FIG. 8 is a schematic view of the structure of the weeding machine of the present invention;

FIG. 9 is a schematic view of the structure of the ditcher of the present invention;

FIG. 10 is a schematic view of the ditching fertilizer applicator of the present invention;

in the figure, 1, an engine; 2. a chassis crawler traveling system; 3. manual and remote control systems; 4. a gearbox; 5. a clutch operating handle; 6. a gear operating handle; 7. a power output handle; 8. a control panel; 9. a hydraulic oil cylinder suspension bracket; 10. a left and right steering handle mounting seat; 11. a hydraulic cylinder; 12. an agricultural implement unit;

2-1, tensioning the bolt; 2-2, fixing a nut; 2-3, 60mm square tube; 2-4, square steel; 2-5 mm square tubes; 2-6, a big frame; 2-7, tensioning the wheel shaft; 2-8, rubber track; 2-9, bearing wheels; 2-10, a tension wheel;

3-1, an electric push rod; 3-2, a receiver; 3-3, a remote controller; 3-4 electromagnetic valves; 3-5, steering the small oil cylinder left and right; 3-6 brake pull wires; 3-7, a left steering handle and a right steering handle; 3-5-1, a cylinder body; 3-5-2, a piston rod; 3-5-3, a return spring; 3-5-4, locking nut; 3-5-5, top ;

4-1, a clutch wheel; 4-2, pinion; 4-3, a clutch shaft; 4-4, a gearbox body; 4-5, hydraulic oil pump; 4-6, main shaft duplicate gear; 4-7, a reverse sliding gear; 4-8, 1-3 gears of sliding gears; 4-9, a main shaft; 4-10, a two-shaft duplicate gear; 4-11, 2-4 gears of sliding gears; 4-12, two axes; 4-13, brake rocker arm; 4-14, a steering brake assembly; 4-15, a reduction gear; 4-16, a reduction pinion; 4-17, differential mounting seat; 4-18, a steering shaft; 4-19, a differential assembly; 4-20, a differential gear gearwheel; 4-21, braking rocker shaft; 4-22, a drive shaft; 4-23, driving shaft tube; 4-24, driving the big gear; 4-25, driving wheels; 4-26, power take-off shaft; 4-27, power take off slip gear; 4-28, rotating the supporting arm by the agricultural implement unit;

12-1, a chain case protective cover; 12-2, a left side plate; 12-3, a rotating sleeve; 12-4, a right side plate; 12-5, a small chain wheel; 12-6, connecting a girder; 12-7, connecting plates of hydraulic cylinders; 12-8, a large chain wheel; 12-9, a rotary cultivator cover shell and a template assembly; 12-10, bearing seats; 12-11, a rotary tiller shaft assembly; 12-12, a chain; 12-13, a weeder housing; 12-14, aligning the base plate; 12-15, universal wheels; 12-16, a weeder cutter shaft assembly; 12-17, a ditching power input shaft; 12-18, a pinion of a ditcher; 12 to 19; a reverse reduction gear box; 12-20, a large gear of a ditcher; 12-21, a ditcher cutter shaft assembly; 12-22, ditching cover shell; 12-23, scraping the soil; 12-24, installing a ditching machine cover shell installing frame; 12-25, a fertilizer flow control system; 12-26 parts of a fertilizer hopper; 12-27, a fertilizing cover; 12-28, a fertilizing tube and a small plough.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.

In the present invention, the upper, lower, left and right sides in the drawings are regarded as the upper, lower, left and right sides of the ultra-short crawler tractor described in this specification.

The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, which, however, may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments presented in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.

Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.

Example 1

As shown in figure 1, the ultra-low and ultra-short crawler tractor at least comprises an engine 1, a chassis crawler traveling system 2, an agricultural implement unit 12 and a hydraulic oil cylinder suspension bracket 9, wherein the engine 1 is installed on a big frame 2-6 of the chassis crawler traveling system 2, a gearbox 4 is installed on the rear end of the big frame 2-6 of the chassis crawler traveling system 2, and the engine 1 is in transmission connection with the gearbox 4 through a V-belt; the upper end of the gearbox 4 is fixedly provided with a receiver 3-2 and an electromagnetic valve 3-4 of the manual and remote control system 3, the rear ends of the receiver 3-2 and the electromagnetic valve 3-4 are provided with an operation panel 8, the rear end of the operation panel 8 is fixedly provided with a left and right steering handle mounting seat 10, the left and right steering handle mounting seat 10 is provided with a left and right steering handle 3-7, the rear end of the gearbox 4 is fixedly connected with a hydraulic oil cylinder suspension frame 9, and a clutch operation handle 5, a gear operation handle 6 and a power output handle 7 of the gearbox 4 extend out of the upper end face of the operation panel 8; the rotary sleeve 12-3 of the agricultural implement unit 12 is movably sleeved on the rotary supporting arm 4-28 of the gearbox 4; and power output shafts 4-26 of the gear box 4 are in transmission connection with the power input shaft of the agricultural implement unit 12 on the same side through chain sprockets.

Preferably, the engine 1 is a single-cylinder water-cooled 12-18 horsepower diesel engine. short, short and small diesel engine is selected as possible.

Example 2

On the basis of the embodiment 1, as shown in fig. 2, the chassis crawler traveling system 2 is composed of a tension bolt 2-1, a large frame 2-6, a bearing wheel 2-9, a tension wheel 2-10 and a rubber crawler 2-8, wherein an edge beam is welded on the large frame 2-6, the edge beam is a 60mm square tube 2-3, a plug with a through hole in the middle is arranged at the rear end of the 60mm square tube 2-3, fixing nuts 2-2 are arranged on two sides of the plug, and the fixing nuts 2-2 on the inner side of the plug are welded; a 50mm square tube 2-5 is movably sleeved in a 60mm square tube 2-3, one end, located in the 60mm square tube 2-3, of the 50mm square tube 2-5 is welded with a square steel 2-4 with a small pit, a tensioning bolt 2-1 penetrates through a fixing nut 2-2 and a plug to be abutted against the small pit of the square steel 2-4, the other end of the 50mm square tube 2-5 is welded with a tensioning wheel shaft 2-7, and a tensioning wheel 2-10 is rotatably installed on the tensioning wheel shaft 2-7; the bearing wheel shaft of the bearing wheel 2-9 is welded below the 60mm square tube 2-3, and the driving wheel 4-25, the bearing wheel 2-9 and the tension wheel 2-10 of the gearbox 4 are rotationally connected from left to right through the rubber track 2-8. The 60mm and 50mm of the 60mm square tube and the 50mm square tube refer to the side length of the square tube.

Preferably, the small pits are small round pits, the size of each small round pit is larger than that of each tensioning bolt, the tensioning bolts 2-1 are used for tightly supporting the 50mm square pipes 2-5, the rubber crawler 2-8 is properly tightened, and the nuts 2-2 on the outer sides of the plugs are used for locking, so that the tightness of the rubber crawler is adjusted. The bearing wheels 2-9 can be a plurality of and are evenly arranged.

Further, as shown in fig. 3, the manual and remote control system 3 is composed of a brake pull wire 3-6, a left and right steering handle 3-7, an electric push rod 3-1, a receiver 3-2, a remote controller 3-3, an electromagnetic valve 3-4, a left and right steering small oil cylinder 3-5 and a hydraulic oil cylinder 11;

furthermore, the receiver 3-2 and the electromagnetic valve 3-4 are arranged at the upper end of the gearbox 4, and the output line of the receiver 3-2 is respectively connected with the electric push rod 3-1 and a coil wire of the electromagnetic valve 3-4 for left-right steering and lifting of the machine tool; the electric push rod 3-1 is connected with an accelerator pull rod of the engine 1; the electromagnetic valves 3-4 are respectively connected with a hydraulic oil pump 4-5 of the gearbox 4, a left and right steering small oil cylinder 3-5 and a hydraulic oil cylinder 11 for lifting an agricultural implement unit 12 through oil pipes, the left and right steering small oil cylinders 3-5 are installed on the large frame 2-6, and the remote controller 3-3 is in electric signal connection with the receiver 3-2; the oil pipe is preferably a high-pressure oil pipe.

Further, as shown in fig. 5, the small left-right steering oil cylinder 3-5 comprises a cylinder body 3-5-1, a piston rod 3-5-2, a return spring 3-5-3, a locking nut 3-5-4 and a top 3-5-5; a piston rod 3-5-2 and a return spring 3-5-3 are arranged in the cylinder body 3-5-1, the return spring 3-5-3 is arranged on the piston rod 3-5-2, a top 3-5-5 is arranged at the top of the piston rod 3-5-2 through a locking nut 3-5-4, and the locking nut 3-5-4 and the top 3-5-5 are positioned outside the cylinder body 3-5-1; as shown in FIG. 4, the lifting hole opening of the top 3-5-5 is sleeved on the brake rocker shaft 4-21 of the gearbox 4, and the brake rocker shaft 4-21 is connected with the left and right steering handles 3-7 through the brake pull wire 3-6. The manual and remote control steering structure has simple structure, and manual and remote control steering is not influenced mutually.

Furthermore, the left and right steering handles 3-7 are composed of a left steering handle and a right steering handle, and are symmetrically arranged at two sides of the left and right steering handle mounting seat 10.

The utility model discloses owing to used the utility model discloses a chassis track traveling system 2, the utility model discloses a overspeed device tensioner of tensioning bolt, tensioning shaft, take-up pulley and square pipe constitution, its simple structure, the dependable performance practices thrift the space, uses short, small diesel engine in addition, makes highly reduce below 700mm, adopts manual and remote control system 3, and the during operation need not hand, and the people is not to the tree under, and the operation is accomplished to light pine.

Example 3

On the basis of the embodiment 1 or 2, as shown in FIG. 6, the gearbox 4 comprises a gearbox body 4-4, a clutch shaft 4-3, a main shaft 4-9, a secondary shaft 4-12, a steering shaft 4-18, a driving shaft 4-22 and a power output shaft 4-26;

further, the clutch shaft 4-3 is movably arranged at the front position of the upper part of the gearbox body 4-4, the left end of the clutch shaft 4-3 is sleeved with the clutch wheel 4-1, the right end is provided with the hydraulic oil pump 4-5, and the hydraulic oil pump 4-5 is fixed on the gearbox body 4-4; a separation rod connected with a clutch control handle 5 is arranged on the inner side of the clutch wheel 4-1; the clutch wheel 4-1 is in transmission connection with a belt pulley of the engine 1 through a triangular belt; a small gear 4-2 for power input is fixedly arranged in the middle of the clutch shaft 4-3;

further, a main shaft 4-9 is arranged in the middle of the upper part of the gearbox body 4-4, a main shaft duplicate gear 4-6 is fixedly arranged at the left end of the main shaft 4-9, a large gear and a small gear 4-2 of the main shaft duplicate gear 4-6 are normally meshed, a reverse sliding gear 4-7 is movably arranged in the middle of the main shaft 4-9, and a 1-3 gear sliding gear 4-8 is movably arranged at the right end;

further, the two shafts 4-12 are arranged in the middle of the upper part of the gearbox body 4-4, 2-4 sliding gears 4-11 are movably arranged at the left ends of the two shafts 4-12, a reduction pinion 4-16 is fixedly arranged in the middle of the two shafts 4-12, and two shaft duplicate gears 4-10 are fixedly arranged at the right ends of the two shafts 4-12; the gear control handle 6 is connected with a reverse gear sliding gear 4-7, a 1-3 gear sliding gear 4-8 and a 2-4 gear sliding gear 4-11 through a gear shifting fork to realize gear shifting;

furthermore, the steering shafts 4-18 are arranged in the middle of the lower portion of the gearbox body 4-4, differential installation seats 4-17 are fixedly installed on the two inner sides of the gearbox body 4-4 respectively, a differential assembly 4-19 is movably installed between the two differential installation seats 4-17, a differential gear bull gear 4-20 is fixedly installed on the differential assembly 4-19, the differential gear bull gear 4-20 is constantly meshed with a reduction pinion gear 4-16, the steering shafts 4-18 are symmetrically installed on the two sides of the differential assembly 4-19, the reduction gears 4-15 are fixedly installed on the steering shafts 4-18, the steering shafts 4-18 extend out of the gearbox body 4-4, a steering brake assembly 4-14 is installed at the end portion of each steering shaft 4-18, and each steering brake assembly 4-14 comprises a brake rocker arm 4-13, a brake rocker arm 4-13 and a brake rocker, The brake rocker arm shaft 4-21, the brake fixing seat, the brake shoe and the brake drum, the upper end of the brake rocker arm 4-13 is arranged outside the brake fixing seat, the lower end of the brake rocker arm 4-13 is connected with the brake rocker arm shaft 4-21, and the brake shoe and the brake drum are arranged in the brake fixing seat and are positioned outside the steering shaft 4-18.

Furthermore, two driving shafts 4-22 are respectively and symmetrically distributed at two sides of the lower part of the gearbox body 4-4, and one end of each driving shaft 4-22, which is positioned at the inner side of the gearbox body 4-4, is fixedly provided with a driving gearwheel 4-24; one end of the driving shaft 4-22, which is positioned at the outer side of the gearbox body 4-4, is sleeved with a driving shaft pipe 4-23, and the end part of the driving shaft 4-22 is fixedly provided with a driving wheel 4-25; the driving big gears 4-24 and the reduction gears 4-15 are constantly meshed, and the driving wheels 4-25 drive the crawler to walk;

furthermore, two sides of the rear middle edge of the gear box body 4-4 are symmetrically provided with rotating support arms 4-28 of the agricultural implement unit, the rotating support arms 4-28 of the agricultural implement unit are long, the length of the rotating support arms 4-28 of the agricultural implement unit is required to be capable of extending to the outside of the rubber track 2-8, the rotating support arms 4-28 of the agricultural implement unit are movably sleeved with rotating sleeves 12-3, the middle of the rotating support arms 4-28 of the agricultural implement unit on the left side of the gear box body 4-4 is movably provided with power output shafts 4-26, the power output shafts 4-26 are movably provided with power output sliding gears 4-27 inside the gear box body 4-4, the other sides are fixedly provided with power output chain wheels, and power is transmitted to the agricultural implement unit 12 through chains 12-; the power output handle 7 realizes power output and stop through a shifting fork and power output sliding gears 4-27.

Furthermore, the upper end of the hydraulic oil cylinder suspension bracket 9 is movably connected with the upper end of a hydraulic oil cylinder 11 in a pin shaft mode, and the other end of the hydraulic oil cylinder 11 is movably connected with a hydraulic cylinder connecting plate 12-7 of an agricultural implement unit 12 in a pin shaft mode.

Preferably, the gearbox 4 has 5 gears, 4 forward gears and a reverse gear; the 4 forward gears are specifically: the speed of 1 gear is 0.6Km/h, the speed of 2 gear is 0.95Km/h, the speed of 3 gear is 1.55Km/h, the speed of 4 gear is 4Km/h, and the speed of reverse gear is 2.2 Km/h; the rotational speed 557 of the power take-off shaft 4-26 of the gearbox 4.

The utility model discloses super short type caterpillar tractor control method, when starting, the gear control handle is located the neutral position, and power take off control handle is located the separation position, starts the engine; when the clutch is moved forward, the clutch control handle is moved to be positioned at a separation position, then the gear control handle is moved to select a proper gear according to different speed requirements of operation, the clutch is released, and when the power of the working machine is output, the power output control handle is moved to be positioned at an output position; when the left and right steering wheels are steered, the left and right steering handles are pinched according to the steering angle, the greater the pinching force is, the greater the steering angle is, and the pinching pivot is turned; when the agricultural machinery is braked, the left and right steering handles are simultaneously tightened, and when the agricultural machinery is controlled by remote control, the size of an accelerator is controlled by using the ten or one of the remote controllers, the steering is controlled by the left and right, and the agricultural machinery unit is controlled to ascend and descend.

The gearbox with the structure of the utility model has the advantages of small volume, simple structure, more gears, slow speed and highest speed of 4Km/h, and is very suitable for the old to operate and walk in small plots in mountainous areas, namely 1 gear; the working speed is very slow at 0.6Km/h, the deep groove can be opened for a tractor with small horsepower, fine work can be realized, the rotary supporting arms of the agricultural implement unit are symmetrically arranged at two sides and movably sleeved with the rotary sleeves 12-3 of the agricultural implement unit, the power output shaft 4-26 is movably arranged in the middle of the rotary supporting arm 4-28 of the agricultural implement unit at the left side, the power output shaft 4-26 and the power input shaft of the agricultural implement unit are arranged at the same side and are in transmission connection in a chain 12-12 chain wheel mode through a chain 12-12 chain wheel transmission system, the structure is simple in structure and most critical, the length of the whole tractor is shorter than that of other suspension frames and the power output shaft at the rear side by 0.5-1 meter, and the tractor is ultra-short and convenient for turning. The structure is solid, durable and cheap.

Example 4

Based on the embodiment 3, as shown in fig. 7, the agricultural implement unit 12 is a rotary cultivator, a weeding machine, a furrowing machine or a furrowing and fertilizing machine.

Preferably, the agricultural implement unit 12 is a rotary cultivator, the middle of a left side plate 12-2 and a right side plate 12-4 of the rotary cultivator is fixedly connected through a connecting girder 12-6, the middle of the connecting girder 12-6 is welded with a hydraulic cylinder connecting plate 12-7 with a lifting hole and is movably connected with a hydraulic cylinder 11 through a pin shaft mode, the lower ends of the left side plate 12-2 and the right side plate 12-4 are respectively and fixedly provided with a bearing seat 12-10, a rotary cultivator cutter shaft assembly 12-11 is rotatably arranged between the two bearing seats 12-10, the left side of the rotary cultivator cutter shaft assembly 12-11 is fixedly provided with a large chain wheel 12-8, the upper ends of the left side plate 12-2 and the right side plate 12-4 are respectively and fixedly provided with a rotary sleeve 12-3, and the two rotary sleeves 12-3 are symmetrically and movably sleeved on a rotary supporting arm 4-28, a small chain wheel 12-5 is fixedly arranged on a power output shaft 4-26 of the gearbox 4, the small chain wheel 12-5 is in transmission connection with a large chain wheel 12-8 through a chain 12-12, a chain box protective cover 12-1 is fixed on a left side plate 12-2, and a rotary cultivator cover and a template assembly 12-9 are fixed on the left side plate 12-2 and a right side plate 12-4.

The two sides of the rotary sleeve 12-3 are symmetrically and movably sleeved on the rotary supporting arms 4-28 of the agricultural implement unit, the rotary sleeve has the advantages of short length and ultrashort, the hydraulic cylinder connecting plate 12-7 with a hanging hole is welded in the middle of the connecting crossbeam 12-6 and is movably connected with the hydraulic cylinder 11 in a pin shaft mode, and the rotary sleeve can be spun along with the change of the terrain during operation. The power output of the gearbox is 557 turns, and the rotary tiller shaft assembly 12-11 is slow in rotation speed and is decelerated through a small chain wheel 12-5 and a large chain wheel 12-8 during rotary tillage operation.

Example 5

On the basis of the embodiment 4, preferably, as shown in fig. 8, the agricultural implement unit 12 is a weeding machine, the assembly of the weeding machine and the rotary cultivator is basically the same, except that the hydraulic cylinder connecting plate 12-7 is not welded in the middle of the connecting girder 12-6, the rotary cultivator cutter shaft assembly 12-11 is replaced by a weeding machine cutter shaft assembly 12-16, the large chain wheel 12-8 and the small chain wheel 12-5 are replaced and assembled, the weeding machine cover 12-13 is fixed on the left side plate 12-2 and the right side plate 12-4, and the universal wheel 12-15 is fixedly connected at the lower end of the weeding machine cover 12-13 through the adjusting cushion plate 12-14.

During weeding, the rotating speed of the cutter shaft assembly 12-16 of the weeding machine is high, the speed is increased, the large chain wheel 12-8 and the small chain wheel 12-5 are assembled in an exchange mode, the operation requirement is completely met, as shown in figure 8, the adjusting cushion plates 12-14 and the universal wheels 12-15 are fixedly installed on the weeding machine housing 12-13, the structure is not connected with a hydraulic cylinder, and the ground clearance is adjusted by the adjusting cushion plates 12-14 during weeding operation, so that the weeding machine is convenient and reliable.

Example 6

On the basis of the embodiment 4, preferably, as shown in fig. 9, the agricultural implement unit 12 is a ditcher, the ditcher and the rotary cultivator are basically assembled in the same manner, except that a reversing reduction gear box 12-19 is fixedly installed on a left side plate 12-2, a large chain wheel 12-8 and a ditcher pinion 12-18 are fixed on a ditching power input shaft 12-17 of the ditcher, a bearing seat 12-10 is fixedly installed on a right side plate 12-4, a ditcher cutter shaft assembly 12-21 is rotatably installed on the reversing reduction gear box 12-19, one end of the ditcher cutter shaft assembly 12-21 is fixed on the bearing seat 12-10, the other end of the ditcher cutter shaft assembly extends into the reversing reduction gear box 12-19 and is fixedly provided with a ditcher gearwheel 12-20, and the ditcher gearwheel 12-20 is constantly meshed with the ditcher pinion 12-18, a ditching machine cover shell mounting frame 12-24 is fixed on the left side plate 12-2 and the right side plate 12-4, and a ditching cover shell 12-22 and a soil scraping plate 12-23 are fixed on the ditching machine cover shell mounting frame 12-24 and the connecting girder 12-6; the structure can be used as a ditcher by only adding one reversing reduction gear box 12-19.

Example 7

On the basis of the embodiment 6, preferably, as shown in fig. 10, the agricultural implement unit 12 is a ditching fertilizer applicator, the ditching fertilizer applicator and the ditching machine are assembled basically the same, except that a ditching housing 12-22 and a scraper 12-23 are taken off and replaced by a fertilizing housing 12-27 and a fertilizer hopper 12-26, a fertilizer flow control system 12-25 is arranged at an inlet of the fertilizer hopper 12-26, and a fertilizer application pipe and a small plough 12-28 are arranged below the fertilizer hopper 12-26; the other things being equal. The ditching or ditching fertilization can be carried out during operation only by replacing different components. Is convenient and simple. The fertilizer flow control systems 12-25 may be flow meters, as is known in the art.

The embodiment described in the present invention is only right the description of the preferred embodiment of the present invention, not right the present invention is designed and limited, without departing from the present invention, the technical personnel in the field are right the present invention has various modifications and improvements, all fall into the protection scope of the present invention. The components and structures of the present embodiments, as well as various assemblies, are well known in the art and are not intended to be limited to the details shown herein.

Claims (7)

1. An ultra-low and ultra-short crawler tractor is characterized in that: the agricultural machinery is characterized by at least comprising an engine (1), a chassis crawler traveling system (2), an agricultural machinery unit (12) and a hydraulic oil cylinder suspension bracket (9), wherein the engine (1) is installed on a large frame (2-6) of the chassis crawler traveling system (2), a gearbox (4) is installed on the upper part of the rear end of the large frame (2-6) of the chassis crawler traveling system (2), and the engine (1) is in transmission connection with the gearbox (4) through a triangular belt; the upper end of the gearbox (4) is fixed with a receiver (3-2) and an electromagnetic valve (3-4) of a manual and remote control system (3), the rear ends of the receiver (3-2) and the electromagnetic valve (3-4) are provided with a control panel (8), the rear end of the control panel (8) is fixedly provided with a left and right steering handle mounting seat (10), the left and right steering handle mounting seat (10) is provided with a left and right steering handle (3-7), the rear end of the gearbox (4) is fixedly connected with a hydraulic oil cylinder suspension bracket (9), and a clutch control handle (5), a gear control handle (6) and a power output handle (7) of the gearbox (4) extend out of the upper end face of the control panel (8); the rotary sleeve (12-3) of the agricultural implement unit (12) is movably sleeved on the rotary supporting arm (4-28) of the gearbox (4); and a power output shaft (4-26) of the gearbox (4) is in transmission connection with a power input shaft of the agricultural implement unit (12) on the same side through a chain sprocket.

2. The ultra-low and ultra-short type caterpillar tractor according to claim 1, wherein: the engine (1) is a single-cylinder water-cooled 12-18 horsepower diesel engine.

3. The ultra-low and ultra-short type caterpillar tractor according to claim 1, wherein: the chassis crawler traveling system (2) consists of a tensioning bolt (2-1), a large frame (2-6), a bearing wheel (2-9), a tensioning wheel (2-10) and a rubber crawler (2-8), wherein an edge beam is welded on the large frame (2-6), the edge beam is a 60mm square tube (2-3), a plug with a through hole in the middle is arranged at the rear end of the 60mm square tube (2-3), fixing nuts (2-2) are arranged on two sides of the plug, and the fixing nuts (2-2) on the inner side of the plug are welded; a 50mm square pipe (2-5) is movably sleeved in a 60mm square pipe (2-3), one end, located in the 60mm square pipe (2-3), of the 50mm square pipe (2-5) is welded with square steel (2-4) in a small pit, a tensioning bolt (2-1) penetrates through a fixing nut (2-2) and a plug and abuts against the small pit of the square steel (2-4), a tensioning wheel shaft (2-7) is welded at the other end of the 50mm square pipe (2-5), and a tensioning wheel (2-10) is rotatably installed on the tensioning wheel shaft (2-7); a bearing wheel shaft of the bearing wheel (2-9) is welded below the 60mm square tube (2-3), and a driving wheel (4-25), the bearing wheel (2-9) and a tension wheel (2-10) of the gearbox (4) are rotationally connected from left to right through a rubber track (2-8).

4. The ultra-low ultra-short crawler tractor according to claim 3, wherein: the manual and remote control system (3) consists of a brake pull wire (3-6), left and right steering handles (3-7), an electric push rod (3-1), a receiver (3-2), a remote controller (3-3), an electromagnetic valve (3-4), left and right steering small oil cylinders (3-5) and a hydraulic oil cylinder (11);

the receiver (3-2) and the electromagnetic valve (3-4) are installed at the upper end of the gearbox (4), and the output line of the receiver (3-2) is respectively connected with the electric push rod (3-1) and a coil wire of the electromagnetic valve (3-4) for left-right steering and lifting of the machine tool; the electric push rod (3-1) is connected with an accelerator pull rod of the engine (1); the electromagnetic valves (3-4) are respectively connected with a hydraulic oil pump (4-5) of the gearbox (4), a left and right steering small oil cylinder (3-5) and a hydraulic oil cylinder (11) for lifting of an agricultural implement unit (12) through oil pipes, the left and right steering small oil cylinders (3-5) are installed on a large frame (2-6), and a remote controller (3-3) is in electric signal connection with a receiver (3-2);

the left and right steering small oil cylinder (3-5) comprises a cylinder body (3-5-1), a piston rod (3-5-2), a return spring (3-5-3), a locking nut (3-5-4) and a top (3-5-5); a piston rod (3-5-2) and a return spring (3-5-3) are installed in the cylinder body (3-5-1), the return spring (3-5-3) is arranged on the piston rod (3-5-2), the top (3-5-5) is installed at the top of the piston rod (3-5-2) through a locking nut (3-5-4), and the locking nut (3-5-4) and the top (3-5-5) are located outside the cylinder body (3-5-1); the lifting hole opening of the top (3-5-5) is sleeved on a brake rocker shaft (4-21) of the gearbox (4), and the brake rocker shaft (4-21) is connected with a left steering handle (3-7) and a right steering handle (3-7) through a brake pull wire (3-6).

5. The ultra-low ultra-short crawler tractor according to claim 3, wherein: the gearbox (4) comprises a gearbox body (4-4), a clutch shaft (4-3), a main shaft (4-9), a secondary shaft (4-12), a steering shaft (4-18), a driving shaft (4-22) and a power output shaft (4-26);

the clutch shaft (4-3) is movably arranged at the front position of the upper part of the gearbox body (4-4), the left end of the clutch shaft (4-3) is sleeved with a clutch wheel (4-1), the right end of the clutch shaft is provided with a hydraulic oil pump (4-5), and the hydraulic oil pump (4-5) is fixed on the gearbox body (4-4); a separating rod connected with a clutch control handle (5) is arranged on the inner side of the clutch wheel (4-1); the clutch wheel (4-1) is in transmission connection with a belt pulley of the engine (1) through a triangular belt; a power input pinion (4-2) is fixedly arranged in the middle of the clutch shaft (4-3);

the main shaft (4-9) is arranged in the middle of the upper part of the gearbox body (4-4), a main shaft duplicate gear (4-6) is fixedly arranged at the left end of the main shaft (4-9), a large gear and a small gear (4-2) of the main shaft duplicate gear (4-6) are normally meshed, a reverse gear sliding gear (4-7) is movably arranged in the middle of the main shaft (4-9), and a 1-3 gear sliding gear (4-8) is movably arranged at the right end of the main shaft (4-9);

the two shafts (4-12) are arranged in the middle of the upper part of the gearbox body (4-4), 2-4 gears of sliding gears (4-11) are movably arranged at the left ends of the two shafts (4-12), a reduction pinion (4-16) is fixedly arranged in the middle of the two shafts (4-12), and two shaft duplicate gears (4-10) are fixedly arranged at the right ends of the two shafts (4-12); the gear control handle (6) is connected with a reverse gear sliding gear (4-7), a 1-3 gear sliding gear (4-8) and a 2-4 gear sliding gear (4-11) through a gear shifting fork to realize gear shifting;

the steering shaft (4-18) is arranged in the middle of the lower part of the gearbox body (4-4), differential installation seats (4-17) are respectively and fixedly installed on the two inner sides of the gearbox body (4-4), a differential assembly (4-19) is movably installed between the two differential installation seats (4-17), a differential gear large gear (4-20) is fixedly installed on the differential assembly (4-19), the differential gear large gear (4-20) is meshed with a reduction pinion (4-16), steering shafts (4-18) are symmetrically installed on the two sides of the differential assembly (4-19), reduction gears (4-15) are fixedly installed on the steering shafts (4-18), the steering shafts (4-18) extend out of the gearbox body (4-4), and steering brake assemblies (4-14) are installed at the end parts of the steering shafts (4-18), the steering brake assembly (4-14) comprises a brake rocker arm (4-13), a brake rocker arm shaft (4-21), a brake fixing seat, a brake shoe and a brake drum;

the two driving shafts (4-22) are respectively and symmetrically distributed at two sides of the lower part of the gearbox body (4-4), and one end of each driving shaft (4-22) positioned at the inner side of the gearbox body (4-4) is fixedly provided with a driving large gear (4-24); one end of the driving shaft (4-22) positioned at the outer side of the gearbox body (4-4) is sleeved with a driving shaft pipe (4-23), and the end part of the driving shaft (4-22) is fixedly provided with a driving wheel (4-25); the driving large gears (4-24) are constantly meshed with the reduction gears (4-15), and the driving wheels (4-25) drive the crawler to walk;

furthermore, two sides of the rear middle edge of the gearbox body (4-4) are symmetrically provided with rotating support arms (4-28) of an agricultural implement unit, the length of the rotating support arms (4-28) of the agricultural implement unit can extend to the outer side of the rubber track (2-8), the rotating support arms (4-28) of the agricultural implement unit are movably sleeved with rotating sleeves (12-3), the middle of the rotating support arms (4-28) of the agricultural implement unit on the left side of the gearbox body (4-4) is movably provided with a power output shaft (4-26), the power output shaft (4-26) is movably provided with a power output sliding gear (4-27) in the gearbox body (4-4), the other side of the power output sliding gear is fixedly provided with a power output chain wheel, and power is transmitted to the agricultural implement unit (12) through a chain (12; the power output handle (7) realizes power output and stop through a shifting fork and power output sliding gears (4-27).

6. The ultra-low and ultra-short type caterpillar tractor according to claim 1, wherein: the agricultural implement unit (12) is a rotary cultivator, a weeding machine, a ditching machine or a ditching and fertilizing machine.

7. The ultra-low and ultra-short type caterpillar tractor according to claim 6, wherein: the middle of a left side plate (12-2) and a right side plate (12-4) of the rotary cultivator is fixedly connected through a connecting girder (12-6), a hydraulic cylinder connecting plate (12-7) with a lifting hole is welded in the middle of the connecting girder (12-6) and is movably connected with a hydraulic cylinder (11) through a pin shaft mode, the lower ends of the left side plate (12-2) and the right side plate (12-4) are respectively and fixedly provided with a bearing seat (12-10), a rotary cultivator cutter shaft assembly (12-11) is rotatably arranged between the two bearing seats (12-10), the left side of the rotary cultivator cutter shaft assembly (12-11) is fixedly provided with a large chain wheel (12-8), the upper ends of the left side plate (12-2) and the right side plate (12-4) are respectively and fixedly provided with a rotating sleeve (12-3), two rotating sleeves (12-3) are symmetrically and movably sleeved on rotating supporting arms (4-28) of an agricultural implement unit, a small chain wheel (12-5) is fixedly installed on a power output shaft (4-26) of a gearbox (4), the small chain wheel (12-5) is in transmission connection with a large chain wheel (12-8) through a chain (12-12), a chain box protective cover (12-1) is fixed on a left side plate (12-2), and a rotary cultivator cover and a template assembly (12-9) are fixed on a left side plate (12-2) and a right side plate (12-4);

the assembly of the weeding machine and the rotary cultivator is basically the same, and the difference is that a hydraulic cylinder connecting plate (12-7) is not welded in the middle of a connecting girder (12-6), the rotary cultivator cutter shaft assembly (12-11) is replaced by a weeding machine cutter shaft assembly (12-16), the positions of a large chain wheel (12-8) and a small chain wheel (12-5) are interchanged and assembled, a weeding machine housing (12-13) is fixed on a left side plate (12-2) and a right side plate (12-4), and the lower end of the weeding machine housing (12-13) is fixedly connected with a universal wheel (12-15) through an adjusting cushion plate (12-14);

the ditching machine and the rotary cultivator are basically assembled in the same way, and the difference is that an inverted reduction gear box (12-19) is fixedly arranged on a left side plate (12-2), a large chain wheel (12-8) and a ditching machine pinion (12-18) are fixed on a ditching power input shaft (12-17) of the ditching machine, a bearing seat (12-10) is fixedly arranged on a right side plate (12-4), a ditching machine cutter shaft assembly (12-21) is rotatably arranged on the inverted reduction gear box (12-19), one end of the ditching machine cutter shaft assembly (12-21) is fixed on the bearing seat (12-10), the other end of the ditching machine cutter shaft assembly extends into the inverted reduction gear box (12-19), a ditching machine gearwheel (12-20) is fixedly arranged, and the ditching machine gearwheel (12-20) is constantly meshed with the ditching machine pinion (12-18), a ditching machine housing installation frame (12-24) is fixed on the left side plate (12-2) and the right side plate (12-4), and a ditching housing (12-22) and a soil scraping plate (12-23) are fixed on the ditching machine housing installation frame (12-24) and the connecting girder (12-6);

the ditching fertilizer applicator and the ditching machine are basically assembled in the same way, but the ditching cover (12-22) and the scraper (12-23) are replaced by a fertilizing cover (12-27) and a fertilizer hopper (12-26), a fertilizer flow control system (12-25) is arranged at the inlet of the fertilizer hopper (12-26), and a fertilizing pipe and a small plough (12-28) are arranged below the fertilizer hopper (12-26).

Images