A heightened and widened front axle for medium and large horsepower tractors

Abstract

The present invention relates to the technical field of tractor front axles, and discloses a front axle of a medium-to-large horsepower tractor that is heightened and widened, including a tractor front axle, front axle side sleeves are fixedly arranged on both sides of the tractor front axle, a drive shaft is rotatably arranged in the middle position of the tractor front axle, a toothed disc is fixedly arranged at the rear end of the drive shaft, bevel gears are meshed on both sides of the toothed disc, and transmission rods are fixedly arranged at the opposite ends of two groups of bevel gears, a filling mechanism is arranged on the side of the front axle side sleeve close to the transmission rod, and universal couplings are arranged on the upper side of the transmission rod and the lower side of the filling mechanism. The heightened and widened front axle of a medium-to-large horsepower tractor described in the present invention can make it easier for the tractor to cross obstacles such as deep water areas, large rocks, etc. after being heightened, thereby enhancing the off-road capability of the vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of tractor front axles, in particular to a heightened and widened front axle for tractors in the middle and large horsepower range. Background Art

[0002] Agricultural machinery is developing towards mechanization and automation. In the traditional sense, manual planting has gradually transitioned to mechanical automatic planting. my country's topography is changeable, which has led to the diversification of farmland. At present, when the agricultural machinery used in my country encounters the ups and downs of farmland during work, it can only rely on the driver to ensure the working posture of the agricultural machinery based on experience. This not only puts high demands on the driver, but also greatly increases the driver's workload. However, when facing some pits or encountering silt, it is easy for the tractor to go to the ground to work, which will cause the front axle to contact the ground. Therefore, a heightened and widened front axle of a medium and large horsepower tractor is designed. Summary of the invention

[0003] The main purpose of the present invention is to provide a heightened and widened front axle for a tractor in the medium and large horsepower range, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A front axle of a tractor with medium and large horsepower is heightened and widened, comprising a tractor front axle, front axle side sleeves are fixedly arranged on both sides of the tractor front axle, a driving shaft is rotatably arranged at the middle position of the tractor front axle, a toothed disc is fixedly arranged on the rear end of the driving shaft, bevel gears are meshed on both sides of the toothed disc, a transmission rod is fixedly arranged on the opposite ends of two groups of bevel gears, a filling mechanism is arranged on the side of the front axle side sleeve close to the transmission rod, a universal coupling is arranged on the upper side of the transmission rod and the filling mechanism and on the lower side of the filling mechanism, a lifting cylinder is movably arranged inside the lower side of the front axle side sleeve, a connecting pipe is fixedly arranged on the lower end of the lifting cylinder, a driving motor is fixedly installed on the upper inner wall of the front axle side sleeve, a driving gear is fixedly arranged on the lower side of the rotating shaft of the driving motor, bearing seats are fixedly arranged on the front and rear inner walls of the front axle side sleeve, a threaded rod is arranged on the inner side of the bearing seat and the lifting cylinder, and a driven gear is fixedly arranged on the outer side of the threaded rod close to the driving gear.

[0006] Preferably, the filling mechanism includes a coupling sleeve fixedly arranged on the lower side of a group of universal couplings on the upper side, two groups of fixed blocks are fixedly arranged on the lower side of the coupling sleeve, a lifting seat is fixedly arranged between the two groups of fixed blocks, a plurality of groups of grooves are provided on the inner wall of the coupling sleeve, a coupling rod is movably provided on the inner side of the coupling sleeve, a plurality of groups of convex strips are fixedly provided on the outer side of the coupling rod, movable openings are provided on the front and rear sides of the coupling rod corresponding to the positions of the two groups of fixed blocks, a movable cavity is provided on the inner side of the coupling rod, a limit block is movably provided on the inner side of the movable cavity, and a groove rod is fixedly provided on the upper end of the limit block.

[0007] Preferably, a slot seat is provided on the inner side of the slot rod, a movable rod is movably provided on the inner side of the limit block and the slot rod, a plurality of groups of connecting slots are provided on the outer side of the movable rod, three groups of first fixed shafts are fixedly provided on the inner sides of several groups of the connecting slots, filling strips are movably provided on the inner sides of several groups of the slot seats, one side of several groups of the filling strips are provided, three groups of second fixed shafts are fixedly provided on the inner sides of the notches, a connecting rod is movably connected between the first fixed shaft in the movable rod and the second fixed shaft in the notch, a sliding opening is provided on the lower side of the connecting rod, a third fixed shaft is fixedly provided at a position corresponding to the sliding opening on the inner side of the slot seat, and a spring is fixedly connected between the outer limit block of the coupling rod and the inner bottom of the lifting seat.

[0008] Preferably, the transmission rod is rotatably arranged in the front axle of the tractor and the front axle side sleeve, and the driving gear is meshed with the two sets of driven gears.

[0009] Preferably, the threaded rod is fixedly connected to the inner ring of the bearing seat, and the threaded rod is threadedly connected to the lifting cylinder.

[0010] Preferably, the fixed block and the lifting seat are movably arranged at the movable opening and the inner side of the coupling rod respectively, the lower end of the coupling rod is fixedly connected to the lower universal coupling, the convex strip is engaged with the inner side of the groove strip, and the groove rod passes through the upper side position of the coupling rod.

[0011] Preferably, the movable rod and the limit block are slidably arranged, the movable rod and the lifting seat are fixedly arranged, the three groups of the first fixed axis, the second fixed axis and the connecting rod are vertically arranged, and the filling strip is adapted to the groove seat and the groove strip.

[0012] Preferably, the connecting rod is matched with the connecting groove and the notch, the connecting rod is inclined, and the third fixed axis is matched with the sliding opening.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The existing drive shaft and gear plate respectively drive the bevel gears, transmission rods, filling mechanisms and universal couplings on both sides to rotate and drive. The widened front axle side sleeves on both sides of the tractor front axle make the overall balance more stable, which is very important for operations in complex terrain. When some other road conditions are complicated and need to be adjusted, the drive motor drives the drive gear to rotate, driving the two sets of meshing driven gears and two sets of threaded rods to rotate, so that the threaded lifting cylinder moves downward in the front axle side sleeve, pushing the lower end of the connecting pipe downward to lift the whole upward, so as to achieve the purpose of heightening. The heightened tractor can more easily cross obstacles, such as deep water areas, large rocks, etc., thereby enhancing the off-road capability of the vehicle.

[0015] 2. When the whole is raised, the coupling sleeve and the coupling rod are respectively stretched, and the contact position between the coupling rod and the coupling sleeve will decrease accordingly, as well as the contact position between the convex strip and the groove strip. The stress caused by the contact during transmission will increase, which will accelerate the fatigue damage and wear of the convex strip. However, when the coupling sleeve is raised, the two sets of fixed blocks and the lifting seat will be pulled up. At the same time, the lifting seat will lift the movable rod, the limit block, and the groove rod upward and move them out of the movable cavity, so that several sets of filling strips will automatically enter the interior of the coupling sleeve, which is convenient for the subsequent increase of the transmission contact position.

[0016] 3. Subsequently, the coupling sleeve continues to move upward, and the contact position with the coupling rod continues to decrease. The limit block will press against the upper side of the movable cavity. When the coupling sleeve continues to move, the lifting seat pushes the movable rod to squeeze the spring, and the moving movable rod will push several groups of connecting rods connected to the inner sides of the connecting grooves. The connecting rods slide along the third fixed axis, and move the several groups of connected filling strips to the outside of the groove seat respectively, so that the several groups of filling strips are synchronously expanded outward and respectively inserted into the corresponding several groups of groove strips. Therefore, after the coupling sleeve and the coupling rod move away from each other, several groups of filling strips will be ejected and inserted into the groove strips set on the inner side of the coupling sleeve for filling, thereby increasing the contact position between the coupling sleeve and the coupling rod during transmission, and avoiding the reduction of the life of the card-connected transmission due to large stress during long-term transmission work. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a heightened and widened front axle of a medium-to-large horsepower tractor according to the present invention;

[0018] Figure 2 It is a schematic diagram of the upper part of the cutaway structure of a heightened and widened front axle of a medium-to-large horsepower tractor of the present invention;

[0019] Figure 3 It is a schematic diagram of the internal structure of the front axle side sleeve of a tractor with medium and large horsepower in the present invention with a heightened and widened front axle;

[0020] Figure 4It is a structural schematic diagram of a filling mechanism of a heightened and widened front axle of a medium-to-large horsepower tractor according to the present invention;

[0021] Figure 5 The invention relates to a front axle of a medium-to-large horsepower tractor with a heightened and widened front axle. Figure 3 A schematic diagram of the enlarged structure of the middle part A;

[0022] Figure 6 It is a schematic diagram of the internal structure of a filling mechanism of a heightened and widened front axle of a medium-to-large horsepower tractor according to the present invention;

[0023] Figure 7 The schematic diagram of the partial structure of the filling mechanism of the heightened and widened front axle of a medium-to-large horsepower tractor of the present invention is shown in FIG. Figure 1 ;

[0024] Figure 8 The schematic diagram of the partial structure of the filling mechanism of the heightened and widened front axle of a medium-to-large horsepower tractor of the present invention is shown in FIG. Figure 2 ;

[0025] Fig. 9 The schematic diagram of the partial structure of the filling mechanism of the heightened and widened front axle of a medium-to-large horsepower tractor of the present invention is shown in FIG. Figure 3 ;

[0026] Fig.10 The invention relates to a front axle of a medium-to-large horsepower tractor with a heightened and widened front axle. Fig. 9 Schematic diagram of the explosion structure.

[0027] In the figure: 1, tractor front axle; 2, front axle side sleeve; 3, drive shaft; 4, toothed disc; 5, bevel gear; 6, transmission rod; 7, filling mechanism; 71, coupling sleeve; 72, fixed block; 73, lifting seat; 74, groove strip; 75, coupling rod; 76, convex strip; 77, movable opening; 78, movable cavity; 79, limit block; 710, groove bar; 711, groove seat; 712, movable rod; 713, connecting groove; 714, first fixed shaft; 715, filling strip; 716, notch; 717, second fixed shaft; 718, connecting rod; 719, sliding opening; 720, third fixed shaft; 721, spring; 8, universal coupling; 9, lifting cylinder; 10, connecting pipe; 11, driving motor; 12, driving gear; 13, bearing seat; 14, threaded rod; 15, driven gear. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are relative relationships of directions or positions, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] See also Figure 1-Figure 10 The present invention provides an embodiment: a front axle of a medium-to-large horsepower tractor with a heightened and widened structure, comprising a tractor front axle 1, front axle side sleeves 2 are fixedly arranged on both sides of the tractor front axle 1, a driving shaft 3 is rotatably arranged in the middle position of the tractor front axle 1, a toothed disc 4 is fixedly arranged at the rear end of the driving shaft 3, bevel gears 5 are meshed on both sides of the toothed disc 4, transmission rods 6 are fixedly arranged at the opposite ends of the two sets of bevel gears 5, a filling mechanism 7 is arranged on one side of the front axle side sleeve 2 near the transmission rod 6, and the transmission rod 6 is connected to the upper side of the filling mechanism 7 and the filling mechanism 7. A universal joint 8 is provided at the lower position of the mechanism 7, a lifting cylinder 9 is movably provided inside the lower side of the front axle side sleeve 2, a connecting tube 10 is fixedly provided at the lower end of the lifting cylinder 9, a driving motor 11 is fixedly installed on the upper inner wall of the front axle side sleeve 2, a driving gear 12 is fixedly provided on the lower side of the rotating shaft of the driving motor 11, bearing seats 13 are fixedly provided on the front and rear inner walls of the front axle side sleeve 2, a threaded rod 14 is provided on the inner side of the bearing seat 13 and the lifting cylinder 9, and a driven gear 15 is fixedly provided on the outer side of the threaded rod 14 near the driving gear 12.

[0031] The transmission rod 6 is rotatably arranged in the tractor front axle 1 and the front axle side sleeve 2, the driving gear 12 is meshed with the two sets of driven gears 15, the threaded rod 14 is fixedly connected to the inner ring of the bearing seat 13, and the threaded rod 14 is threadedly connected to the lifting cylinder 9.

[0032] The existing driving shaft 3 and toothed disc 4 respectively drive the bevel gears 5, transmission rod 6, filling mechanism 7 and universal coupling 8 on both sides to perform rotational driving work, and the widened front axle side sleeves 2 on both sides of the tractor front axle 1 make the overall balance more stable, which is very important for operations in complex terrain. When some other road conditions are complicated and need to be adjusted, the driving motor 11 drives the driving gear 12 to rotate, and drives the two sets of meshing driven gears 15 and two sets of threaded rods 14 to rotate, so that the threaded lifting cylinder 9 moves downward in the front axle side sleeve 2, pushing the connecting pipe 10 at the lower end downward to lift the whole upward, so as to achieve the purpose of heightening. The heightened tractor can more easily cross obstacles, such as deep water areas, large rocks, etc., thereby enhancing the off-road capability of the vehicle.

[0033] The filling mechanism 7 includes a coupling sleeve 71 fixedly arranged on the lower side of a group of universal couplings 8 on the upper side, two groups of fixed blocks 72 are fixedly arranged on the lower side of the coupling sleeve 71, a lifting seat 73 is fixedly arranged between the two groups of fixed blocks 72, a plurality of groups of groove strips 74 are provided on the inner wall of the coupling sleeve 71, a coupling rod 75 is movably arranged on the inner side of the coupling sleeve 71, a plurality of groups of convex strips 76 are fixedly arranged on the outer side of the coupling rod 75, movable openings 77 are provided on the front and rear sides of the coupling rod 75 corresponding to the positions of the two groups of fixed blocks 72, a movable cavity 78 is provided on the inner side of the coupling rod 75, a limit block 79 is movably arranged on the inner side of the movable cavity 78, and a groove bar 710 is fixedly arranged on the upper end of the limit block 79.

[0034] The fixed block 72 and the lifting seat 73 are movably arranged on the movable opening 77 and the inner side of the coupling rod 75 respectively. The lower end of the coupling rod 75 is fixedly connected to the lower universal coupling 8. The convex strip 76 is engaged with the inner side of the groove strip 74. The groove bar 710 passes through the upper side position of the coupling rod 75.

[0035] When the whole is raised, the coupling sleeve 71 and the coupling rod 75 are respectively stretched, and the contact position between the coupling rod 75 and the coupling sleeve 71 will be reduced accordingly, and the contact position between the convex strip 76 and the groove strip 74 will be reduced. The stress caused by the contact during transmission will increase, which will accelerate the fatigue damage and wear of the convex strip 76. However, when the coupling sleeve 71 is raised, the two sets of fixed blocks 72 and the lifting seat 73 will be pulled up. At the same time, the lifting seat 73 will lift the movable rod 712, the limit block 79, and the groove bar 710 upward and move them out of the movable cavity 78, so that several sets of filling strips 715 automatically enter the interior of the coupling sleeve 71, which is convenient for the subsequent increase in the transmission contact position.

[0036] A slot seat 711 is provided on the inner side of the slot bar 710, and a movable rod 712 is movably provided on the inner side of the limit block 79 and the slot bar 710. A plurality of groups of connecting slots 713 are provided on the outer side of the movable rod 712, and three groups of first fixed shafts 714 are fixedly provided on the inner sides of the plurality of connecting slots 713. Filling strips 715 are movably provided on the inner sides of the plurality of slot seats 711, and a notch 716 is provided on one side of the plurality of filling strips 715, and three groups of second fixed shafts 717 are fixedly provided on the inner sides of the notch 716. A connecting rod 718 is movably connected between the first fixed shaft 714 in the movable rod 712 and the second fixed shaft 717 in the notch 716, and a sliding opening 719 is provided on the lower side of the connecting rod 718. A third fixed shaft 720 is fixedly provided on the inner side of the slot seat 711 at a position corresponding to the sliding opening 719, and a spring 721 is fixedly connected between the outer limit block 79 of the coupling rod 75 and the inner bottom of the lifting seat 73.

[0037] The movable rod 712 and the limit block 79 are slidably arranged, the movable rod 712 and the lifting seat 73 are fixedly arranged, the three groups of first fixed shafts 714, second fixed shafts 717, and connecting rods 718 are vertically arranged, the filling strip 715 is adapted to the groove seat 711 and the groove strip 74, the connecting rod 718 is adapted to the connecting groove 713 and the notch 716, the connecting rod 718 is inclined, and the third fixed shaft 720 is adapted to the sliding opening 719.

[0038] When the locking cam 720 is in the state of being moved up and down, the locking cam 720 is in the state of being moved up and down, so that the locking cam 720 in the state of being moved up and down can be closed by the locking cam 720, so that the locking cam 720 in the state of being moved up and down can be closed by the locking cam 720.

[0039] Working principle: When in use, the existing driving shaft 3 and toothed disc 4 respectively drive the bevel gears 5, transmission rod 6, filling mechanism 7 and universal coupling 8 on both sides to rotate and drive, and the widened front axle side sleeves 2 on both sides of the tractor front axle 1 make the overall balance more stable, which is very important for operations in complex terrain. In addition, when some complex road conditions require adjustment, the driving motor 11 drives the driving gear 12 to rotate, driving the two sets of meshing driven gears 15 and two sets of threaded rods 14 to rotate, so that the threaded lifting cylinder 9 moves downward in the front axle side sleeve 2, pushing the lower end of the connecting pipe 10 to The whole is lifted upward to achieve the purpose of heightening, and the heightened tractor can more easily cross obstacles, such as deep water areas, large rocks, etc., thereby enhancing the off-road capability of the vehicle; when the whole is raised, the coupling sleeve 71 and the coupling rod 75 are respectively lengthened, and the contact position between the coupling rod 75 and the coupling sleeve 71 is reduced accordingly, and the contact position between the convex strip 76 and the groove strip 74 is reduced, and the contact during transmission causes the stress to increase, which will accelerate the fatigue damage and wear of the convex strip 76, but when the coupling sleeve 71 is raised, the two sets of fixing blocks 72 and the lifting seat 73 are pulled up, and at the same time When the lifting seat 73 is lifted, the movable rod 712, the limit block 79 and the groove rod 710 are lifted upwards and moved out of the movable cavity 78, so that the plurality of groups of filling strips 715 automatically enter the interior of the coupling sleeve 71, which is convenient for the subsequent increase of the transmission contact position; and the subsequent coupling sleeve 71 continues to move upward and the contact position with the coupling rod 75 continues to decrease, the limit block 79 will press against the upper side of the movable cavity 78, and when the coupling sleeve 71 continues to move, the lifting seat 73 pushes the movable rod 712 to squeeze the spring 721, and the moving movable rod 712 pushes the plurality of groups of connecting rods 71 ​​connected to the inner sides of the connecting grooves 713 8. The connecting rod 718 slides along the third fixed axis 720, and moves the connected groups of filling strips 715 to the outside of the groove seat 711, so that the groups of filling strips 715 are synchronously expanded outward and respectively inserted into the corresponding groups of groove strips 74. Therefore, after the coupling sleeve 71 and the coupling rod 75 move away from each other, the groups of filling strips 715 will be pushed out and inserted into the groove strips 74 set on the inner side of the coupling sleeve 71 for filling, thereby increasing the contact position between the coupling sleeve 71 and the coupling rod 75 during transmission, and avoiding the reduction of the life of the card-connected transmission due to large stress during long-term transmission work.

[0040] The tractor front axle 1, drive shaft 3, gear plate 4, bevel gear 5, transmission rod 6, universal coupling 8, and connecting pipe 10 in the present invention are common knowledge in the field of tractor drive, and their working principles are already well-known technologies, and the models are selected according to actual use, so they are not explained in detail.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heightened and widened front axle for a medium to large horsepower tractor, comprising a tractor front axle (1), characterized in that: Front axle side sleeves (2) are fixedly provided on both sides of the tractor front axle (1), a drive shaft (3) is rotatably provided in the middle of the tractor front axle (1), a toothed disc (4) is fixedly provided at the rear end of the drive shaft (3), bevel gears (5) are meshed on both sides of the toothed disc (4), transmission rods (6) are fixedly provided at opposite ends of the two sets of bevel gears (5), a filling mechanism (7) is provided on the inside of the front axle side sleeve (2) near the transmission rod (6), and universal couplings (8) are provided on the upper side of the transmission rod (6) and the filling mechanism (7) and on the lower side of the filling mechanism (7), A lifting cylinder (9) is movably arranged inside the lower side of the front axle side sleeve (2), a connecting tube (10) is fixedly arranged at the lower end of the lifting cylinder (9), a driving motor (11) is fixedly installed on the upper inner wall of the front axle side sleeve (2), a driving gear (12) is fixedly arranged on the lower side of the rotating shaft of the driving motor (11), bearing seats (13) are fixedly arranged on the front and rear inner walls of the front axle side sleeve (2), a threaded rod (14) is arranged on the inner side of the bearing seat (13) and the lifting cylinder (9), and a driven gear (15) is fixedly arranged on the outer side of the threaded rod (14) near the driving gear (12); The filling mechanism (7) comprises a coupling sleeve (71) fixedly arranged on the lower side of a group of universal couplings (8) on the upper side, two groups of fixed blocks (72) are fixedly arranged on the lower side of the coupling sleeve (71), a lifting seat (73) is fixedly arranged between the two groups of fixed blocks (72), a plurality of groups of grooves (74) are provided on the inner wall of the coupling sleeve (71), a coupling rod (75) is movably arranged on the inner side of the coupling sleeve (71), a plurality of groups of convex strips (76) are fixedly arranged on the outer side of the coupling rod (75), movable openings (77) are provided on the front and rear sides of the coupling rod (75) at positions corresponding to the two groups of fixed blocks (72), a movable cavity (78) is provided on the inner side of the coupling rod (75), a limit block (79) is movably arranged on the inner side of the movable cavity (78), and a groove rod (710) is fixedly arranged on the upper end of the limit block (79); A slot seat (711) is provided on the inner side of the slot rod (710); a movable rod (712) is movably provided on the inner side of the limit block (79) and the slot rod (710); a plurality of groups of connecting slots (713) are provided on the outer side of the movable rod (712); three groups of first fixed shafts (714) are fixedly provided on the inner sides of the plurality of groups of connecting slots (713); a filling strip (715) is movably provided on the inner side of the plurality of groups of slot seats (711); a notch (716) is provided on one side of the plurality of groups of filling strips (715); and the inner side of the notch (716) is provided with a plurality of first fixed shafts (714). Three groups of second fixed shafts (717) are fixedly arranged on both sides, a connecting rod (718) is movably connected between the first fixed shaft (714) in the movable rod (712) and the second fixed shaft (717) in the notch (716), a sliding opening (719) is opened on the lower side of the connecting rod (718), a third fixed shaft (720) is fixedly arranged on the inner side of the groove seat (711) at a position corresponding to the sliding opening (719), and a spring (721) is fixedly connected between the outer limit block (79) of the coupling rod (75) and the inner bottom of the lifting seat (73).

2. The heightened and widened front axle of a medium-to-large horsepower tractor according to claim 1 is characterized by: The transmission rod (6) is rotatably arranged in the tractor front axle (1) and the front axle side sleeve (2), and the driving gear (12) is meshed with two sets of driven gears (15).

3. The heightened and widened front axle of a medium-to-large horsepower tractor according to claim 1 is characterized by: The threaded rod (14) is fixedly connected to the inner ring of the bearing seat (13), and the threaded rod (14) is threadedly connected to the lifting cylinder (9).

4. The heightened and widened front axle of a medium to large horsepower tractor according to claim 1, characterized in that: The fixed block (72) and the lifting seat (73) are movably arranged on the movable opening (77) and the inner side of the coupling rod (75), respectively; the lower end of the coupling rod (75) is fixedly connected to the lower universal coupling (8); the convex strip (76) is engaged with the inner side of the groove strip (74); and the groove rod (710) passes through the upper side of the coupling rod (75).

5. The heightened and widened front axle of a medium-to-large horsepower tractor according to claim 1 is characterized by: The movable rod (712) and the limit block (79) are slidably arranged, the movable rod (712) and the lifting seat (73) are fixedly arranged, the three groups of the first fixed shaft (714), the second fixed shaft (717), and the connecting rod (718) are arranged vertically, and the filling strip (715) is adapted to the groove seat (711) and the groove strip (74).

6. The heightened and widened front axle of a medium-to-large horsepower tractor according to claim 1 is characterized by: The connecting rod (718) is matched with the connecting groove (713) and the notch (716); the connecting rod (718) is arranged to be inclined; and the third fixed shaft (720) is matched with the sliding opening (719).

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