Narrow four-wheel tractor
Technical Field
The utility model relates to a tractor technical field especially relates to a narrow and small type four-wheel tractor.
Background
The four-wheel tractor is a kind of tractor, i.e. the tractor whose running gear is wheel mainly includes engine, chassis and electric equipment. The chassis comprises a transmission system, a steering system, a walking system, a braking system and a working device, and the narrow four-wheel tractor is generally used for operation in greenhouses and fields;
the narrow four-wheel tractor in the market at present has small ground clearance, is fixed, cannot adjust the ground clearance according to the use environment, cannot perfectly adapt to field later-stage plant protection operation, and cannot adapt to field operation of crops with different heights, so that the practicability of the narrow four-wheel tractor is greatly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a narrow four-wheel tractor.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a narrow four-wheel tractor comprises a rack, wherein a fixed plate is fixedly connected to the lower surface of one end of the rack, a supporting tube is fixedly connected to the bottom end of the fixed plate, a first rotating shaft is rotatably connected to the inside of the supporting tube in a penetrating manner, supporting rods are rotatably connected to the two ends of the supporting tube in a sleeved manner respectively, an angle adjusting mechanism is installed between the supporting rods and the rack, a second rotating shaft is rotatably connected to the other end of the supporting rods in a penetrating manner, rear wheels are fixedly installed at one ends of the two second rotating shafts, a mounting frame is fixedly connected to the upper surface of the rack, a gearbox is fixedly installed at the top end of the mounting frame, a first transmission assembly is arranged between an output shaft of the gearbox and the first rotating shaft, second transmission assemblies are respectively arranged between the two ends of the first rotating shaft and the two second rotating shafts, and a cross beam is fixedly connected to the lower surface of the other end of the rack, the both ends symmetry fixedly connected with sleeve pipe of crossbeam, two sheathed tube inside all runs through to rotate and is connected with the third pivot, the bottom and the top of third pivot are fixedly connected with ring flange and connecting axle respectively, the bottom fixed mounting of ring flange has elevating system, elevating system's bottom runs through to rotate and is connected with the fourth pivot, the one end fixed mounting of fourth pivot has front wheel.
Furthermore, the angle adjusting mechanism comprises a first hydraulic cylinder, two ends of the first hydraulic cylinder are respectively connected with a first connecting piece and a second connecting piece in a rotating mode, and the first connecting piece and the second connecting piece are respectively fixedly connected with the lower surface of the rack and the outer surface of the supporting rod.
Furthermore, the first transmission assembly comprises a first gear and a second gear, the first gear is fixedly connected with an output shaft of the gearbox, the second gear is sleeved and fixedly installed on the first rotating shaft, and a first chain is connected between the first gear and the second gear in a transmission mode.
Furthermore, the second transmission assembly comprises two third gears and two fourth gears, wherein the two third gears are fixedly connected with two ends of the first rotating shaft respectively, the two fourth gears are fixedly arranged on the two second rotating shafts in a sleeved mode respectively, and a second chain is connected between the third gears and the corresponding fourth gears in a transmission mode.
Further, elevating system includes the mounting panel with flange dish bottom fixed connection, the bottom fixed mounting of mounting panel has the second pneumatic cylinder, the bottom fixedly connected with connecting plate of second pneumatic cylinder, the bottom fixedly connected with bearing frame of connecting plate, just the fourth pivot is connected with the inside rotation of bearing frame.
Furthermore, the surface of connecting plate runs through sliding connection and has a plurality of arcs, the top of arc and the bottom fixed connection of mounting panel, just the fourth pivot is located between two adjacent arcs.
Furthermore, an opening corresponding to the first chain is formed in the outer surface of the rack, and a driving wheel is fixedly connected to one end of an input shaft of the gearbox.
The utility model has the advantages that:
the utility model discloses when using, this narrow and small type four-wheel tractor, the angle adjustment mechanism and the elevating system through setting up can be respectively to the height at frame both ends adjust to realize the holistic altitude mixture control of frame, and then change the clearance on frame and ground, thereby make narrow and small type four-wheel tractor can use various different operational environment, thereby greatly increased narrow and small type four-wheel tractor's practicality.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a side view of the support tube of the present invention;
fig. 3 is a schematic structural view of the angle adjusting mechanism of the present invention;
fig. 4 is a side view of the lifting mechanism of the present invention;
fig. 5 is a schematic view of the connection structure of the connection plate and the arc plate of the present invention.
Illustration of the drawings:
1. a frame; 2. a fixing plate; 3. supporting a tube; 4. a first rotating shaft; 5. a support bar; 6. a second rotating shaft; 7. a rear wheel; 8. a mounting frame; 9. a gearbox; 10. a cross beam; 11. a sleeve; 12. a third rotating shaft; 13. a flange plate; 14. a connecting shaft; 15. a fourth rotating shaft; 16. a front wheel; 17. a first hydraulic cylinder; 18. a first connecting member; 19. a second connecting member; 20. a first gear; 21. a second gear; 22. a first chain; 23. a third gear; 24. a fourth gear; 25. a second chain; 26. mounting a plate; 27. a second hydraulic cylinder; 28. a connecting plate; 29. a bearing seat; 30. an arc-shaped plate; 31. an opening; 32. a driving wheel.
Detailed Description
Referring to fig. 1 to 4, a narrow four-wheel tractor is disclosed, which comprises a frame 1, a fixed plate 2 is fixedly connected to the lower surface of one end of the frame 1, a supporting tube 3 is fixedly connected to the bottom end of the fixed plate 2, a first rotating shaft 4 is rotatably connected to the inside of the supporting tube 3 in a penetrating manner, supporting rods 5 are rotatably connected to the two ends of the supporting tube 3 in a sleeved manner, an angle adjusting mechanism is installed between the supporting rods 5 and the frame 1, a second rotating shaft 6 is rotatably connected to the other end of the supporting rods 5 in a penetrating manner, rear wheels 7 are fixedly installed at one ends of the two second rotating shafts 6, a mounting frame 8 is fixedly connected to the upper surface of the frame 1, a gear box 9 is fixedly installed at the top end of the mounting frame 8, a driving wheel 32 is fixedly connected to one end of an input shaft of the gear box 9, a first transmission assembly is arranged between an output shaft of the gear box 9 and the first rotating shaft 4, and second transmission assemblies are respectively arranged between the two ends of the first rotating shaft 4 and the two second rotating shafts 6, fixed surface is connected with crossbeam 10 under the other end of frame 1, and the both ends symmetry fixedly connected with sleeve pipe 11 of crossbeam 10, and the inside of two sleeve pipes 11 all runs through to rotate and is connected with third pivot 12, and fixedly connected with ring flange 13 and connecting axle 14 are distinguished on the bottom and the top of third pivot 12, and the bottom fixed mounting of ring flange 13 has elevating system, and elevating system's bottom runs through to rotate and is connected with fourth pivot 15, and wheel 16 before the one end fixed mounting of fourth pivot 15.
Referring to fig. 1-3, the angle adjusting mechanism includes a first hydraulic cylinder 17, two ends of the first hydraulic cylinder 17 are respectively and rotatably connected with a first connecting piece 18 and a second connecting piece 19, the first connecting piece 18 and the second connecting piece 19 are respectively and fixedly connected with the lower surface of the frame 1 and the outer surface of the supporting rod 5, the first hydraulic cylinder 17 is started to drive the supporting rod 5 to rotate through the first connecting piece 18 and the second connecting piece 19, so as to change the angle between the supporting rod 5 and the supporting tube 3, and further change the height of one end of the frame 1.
Referring to fig. 2, the first transmission assembly includes a first gear 20 and a second gear 21, the first gear 20 is fixedly connected with an output shaft of the gearbox 9, the second gear 21 is fixedly mounted on the first rotating shaft 4 in a sleeved manner, a first chain 22 is connected between the first gear 20 and the second gear 21 in a transmission manner, an opening 31 corresponding to the first chain 22 is formed in the outer surface of the rack 1, the gearbox 9 operates to drive the first gear 20 to rotate, so that the first chain 22 drives the second gear 21 to rotate, and the first rotating shaft 4 is further driven to rotate;
the second transmission assembly comprises two third gears 23 and two fourth gears 24, the two third gears 23 are respectively fixedly connected with two ends of the first rotating shaft 4, the two fourth gears 24 are respectively sleeved and fixed on the two second rotating shafts 6, a second chain 25 is connected between the third gears 23 and the corresponding fourth gears 24 in a transmission mode, the first rotating shaft 4 rotates to drive the third gears 23 at two ends to rotate, the fourth gears 24 are driven to rotate through the second chains 25, and then the second rotating shafts 6 are driven to rotate, so that the rear wheels 7 on two sides are driven to rotate.
Referring to fig. 1, 4 and 5, the lifting mechanism includes a mounting plate 26 fixedly connected to the bottom end of the flange 13, a second hydraulic cylinder 27 is fixedly mounted to the bottom end of the mounting plate 26, a connecting plate 28 is fixedly connected to the bottom end of the second hydraulic cylinder 27, a bearing seat 29 is fixedly connected to the bottom end of the connecting plate 28, the fourth rotating shaft 15 is rotatably connected to the inside of the bearing seat 29, and the second hydraulic cylinder 27 is started to drive the other end of the frame 1 to move up and down through the mounting plate 26 and the connecting plate 28, so as to change the height of the other end of the frame 1;
the surface of connecting plate 28 runs through sliding connection and has a plurality of arcs 30, the top of arc 30 and the bottom fixed connection of mounting panel 26, and fourth pivot 15 is located between two adjacent arcs 30, can increase the intensity between mounting panel 26 and the connecting plate 28 through the arc 30 that sets up to certain protection is played to second hydraulic cylinder 27.
When the narrow four-wheel tractor is used, firstly, according to the ground clearance required by the narrow four-wheel tractor, the first hydraulic cylinder 17 and the second hydraulic cylinder 27 are respectively started, the first hydraulic cylinder 17 is started to drive the support rod 5 to rotate through the first connecting piece 18 and the second connecting piece 19, so that the angle between the support rod 5 and the support pipe 3 is changed, and further the height of one end of the frame 1 is changed, the second hydraulic cylinder 27 is started to drive the other end of the frame 1 to move up and down through the mounting plate 26 and the connecting plate 28, so that the height of the other end of the frame 1 is changed, further the height adjustment of the frame 1 is realized, so that the clearance between the frame 1 and the ground is changed, so that the narrow four-wheel tractor can use various different working environments, thereby the practicability of the narrow four-wheel tractor is greatly increased, the gearbox 9 operates to drive the first gear 20 to rotate, so that the first chain 22 drives the second gear 21 to rotate, and then the first rotating shaft 4 is driven to rotate, the first rotating shaft 4 rotates to drive the third gears 23 at the two ends to rotate, so that the fourth gear 24 is driven to rotate through the second chain 25, and then the second rotating shaft 6 is driven to rotate, so that the rear wheels 7 at the two sides are driven to rotate, and the narrow four-wheel tractor can move.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.