CN101793310B - Transmission case of wheeled tractor with medium power - Google Patents
Transmission case of wheeled tractor with medium power Download PDFInfo
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- CN101793310B CN101793310B CN2010101276237A CN201010127623A CN101793310B CN 101793310 B CN101793310 B CN 101793310B CN 2010101276237 A CN2010101276237 A CN 2010101276237A CN 201010127623 A CN201010127623 A CN 201010127623A CN 101793310 B CN101793310 B CN 101793310B
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Abstract
The invention relates to a transmission case of a wheeled tractor with medium power, which comprises a gearbox casing, a rear axle casing, a main clutch shaft assembly, a main shift driving shaft assembly, an idler shaft assembly, a main shift driven shaft assembly, an auxiliary change gear shaft assembly, a creeper speed gear shaft assembly, a bevel pinion shaft assembly, a reversing maneuver assembly, a main shift maneuver assembly and an auxiliary shift maneuver assembly. The gearbox casing and the rear axle casing are mutually connected by using a fastener, the main clutch shaft assembly, the main shift driving shaft assembly, the idler shaft assembly, the main shift driven shaft assembly, the reversing maneuver assembly and the main shift maneuver assembly are assembled in the gearbox casing, and the auxiliary change gear shaft assembly, the creeper speed gear shaft assembly, the bevel pinion shaft assembly and the auxiliary shift maneuver assembly are assembled in the rear axle casing. Each shaft inside the gearbox casing and the rear axle casing adopts a spatial arrangement form, the outside of each shaft inside the gearbox casing and the rear axle casing presents a flat octagonal shape section, the distance between the lower parts of the casings and the ground is increased, the height of a ground clearance is increased, and the passing property of the complete machine is improved.
Description
Technical field
The invention belongs to the tractor field, relate to a kind of middle power wheeled tractor transmission case.
Background technique
At present, on the various middle power wheeled tractors of producing at home, mostly transmission case is 8+4 gear (that is: 8 forward gears and 4 retainings that fall back); 8+2 gear (that is: 8 forward gears and 2 retainings that fall back), perhaps 8+8 gear (that is: 8 forward gears and 8 retainings that fall back), the operating speed scope of advancing is at 2～35km/h; Gear is few, and it is big respectively to keep off differential ratio, the operating speed narrow range; Be difficult to satisfy the demand of increasingly extensive agricultural machinery and implement, engineering and hauling operation, simultaneously because the restriction of space factor in the power mechanism housing in the tradition causes gearshift and switching-over all to adopt engagement cover or sliding gear form; Gearshift power is big, smooth gear shifting property difference and be difficult for to handle, and axle system arranges that generally adopting with the engine crankshaft is the center in the conventional gear box in addition; Vertical direction layout form (shown in accompanying drawing 1) directly causes the mechanism housing exterior cross-section to be vertical rectangular downwards, and lower housing portion is nearer apart from ground; Crack, ground height is low, and big through radius, the field passing ability is relatively poor.
Summary of the invention
The object of the present invention is to provide that a kind of velocity range is wide, respectively to keep off differential ratio reasonable, the synchronizer gearshift, axle is a spatial arrangement in the housing, housing is the middle power wheeled tractor transmission case of flat.
The present invention can realize above-mentioned purpose through following technological scheme: the middle power wheeled tractor transmission case comprises: gear box casing 1, rear axle housing body 2, main clutch axle assembly 3, main transformer speed driving shaft assembly 4, idler shaft assembly 5, main transformer speed driven shaft assembly 6, secondary speed change gear axle assembly 7, the retaining gear shaft assembly 8 of creeping, bevel pinion axle assembly 9, reversing maneuver assembly 48, main transformer speed are handled assembly 49, secondary speed change is handled assembly 50.It is characterized in that: gear box casing 1 rear axle housing body 2 usefulness fastening pieces link to each other; Main clutch axle assembly 3, main transformer speed driving shaft assembly 4, idler shaft assembly 5, main transformer speed driven shaft assembly 6, reversing maneuver assembly 48 and main transformer speed are handled assembly 49 and are assemblied in the gear box casing 1; Pair speed change gear axle assembly 7, creep retaining gear shaft assembly 8, bevel pinion axle assembly 9 and secondary speed change are handled assembly 50 and are assemblied in the rear axle housing body 2; Gear box casing 1 and rear axle housing body 2 inner each employing spatial arrangement form make its outside present flat eight prismatic exterior cross-section.
On main-gear box housing 1, forward gear driving gear 17 is connected on the main clutch axle 15 through spline with the retaining driving gear 19 that falls back main clutch axle 15 in the main clutch axle assembly 3 through the bearing freely-supported.
Main transformer speed driving shaft 22 in the main transformer speed driving shaft assembly 4 passes through the bearing supported at three point on main-gear box housing 1; Forward gear driven gear 16, the retaining driven gear 20 that falls back, III retaining driving gear 24, IV retaining driving gear 26 skies are enclosed within on the main transformer speed driving shaft 22, and I retaining driving gear 21, II retaining driving gear 23, switching-over synchronizer assembly 10 and III-IV retaining synchronizer assembly 11 are connected on the main transformer speed driving shaft 22 through spline.
On main-gear box housing 1, the retaining idle pulley 28 that falls back is connected idler shaft 27 through spline to idler shaft 27 in the idler shaft assembly 5 through the bearing freely-supported.
Main transformer speed driven shaft 34 in the main transformer speed driven shaft assembly 6 passes through the bearing freely-supported on main-gear box housing 1; I retaining driven gear 29, II retaining driven gear 31 skies are enclosed within on the main transformer speed driving shaft 34, and III retaining driven gear 32, IV retaining driven gear 33 and I-II retaining synchronizer assembly 12 are connected on the main transformer speed driving shaft 34 through spline.
Secondary change gear shaft 35 in the secondary speed change gear axle assembly 7 passes through the bearing freely-supported on rear axle housing body 2; High retaining driving gear 36, middle retaining driving gear 38 skies are enclosed within on the secondary change gear shaft 35, and high-middle retaining engagement cover assembly 14 is connected on the secondary change gear shaft 35 through internal spline.
The retaining gear shaft 45 of creeping that keeps off in the gear shaft assembly 8 of creeping passes through the bearing freely-supported on rear axle housing body 2, and the retaining gear 41 of creeping is connected on the retaining gear shaft 45 of creeping through spline.
Small coning gear shaft 47 in the bevel pinion axle assembly 9 passes through the bearing freely-supported on rear axle housing body 2; Duplicate gear 40, retaining driven gear 43 skies of creeping are enclosed within on the small coning gear shaft 47, and forerunner's driving gear 39, high retaining driven gear 44, middle retaining driven gear 46 and the low-retaining engagement cover assembly 13 of creeping are connected on the small coning gear shaft 47 through spline.
Switching-over Rocker arm 52 is fixedly connected with switching-over shifting block axle 53 in the reversing maneuver assembly 48; Switching-over shifting block axle 53 is socketed on the gear box casing 1; And carry out axial limiting through limiting board 51; Its shifting block inserts in the allocating slot of switching-over shift fork 54, and switching-over shift fork 54 is socketed on the switching-over declutch shift shaft 58, and positioning ball 57, retaining spring 56 and cotter pin 55 are installed in switching-over shift fork 54 positioning holes; Switching-over shift fork 54 prongs are stirred the commutating tooth cover 18 in the switching-over synchronizer assembly 10, it is endwisely slipped articulate forward gear driven gear 16 or fall back retaining driven gear 20; Main transformer speed rocking arm guide plate 59 is fixedly connected on the gear box casing 1 in the main transformer speed manipulation assembly 49; I-II retaining rocking arm 60 is fixedly connected with I-II retaining shifting block axle 61, and I-II retaining shifting block axle 61 is socketed on the main transformer speed rocking arm guide plate 59, and through its axial limiting; Its shifting block inserts in the allocating slot of I-II retaining shifting block 64; I-II retaining shifting block 64 is fixedly connected on the I-II retaining declutch shift shaft 65 with I-II retaining shift fork 70, and I-II retaining declutch shift shaft 65 is socketed on the gear box casing 1, and I-II retaining shift fork 70 prongs are stirred the I-II retaining tooth cover 30 in the I-II retaining synchronizer assembly 12; It is endwisely slipped articulate I retaining driven gear 29 or II retaining driven gear 31; III-IV retaining rocking arm 62 is fixedly connected with III-IV retaining shifting block axle 63, and III-IV retaining shifting block axle 63 is socketed on the I-II retaining shifting block axle 61, and through its axial limiting; Its shifting block inserts in the allocating slot of III-IV retaining shifting block 66; III-IV retaining shifting block 66 is fixedly connected on the III-IV retaining declutch shift shaft 67 with III-IV retaining shift fork 71, and III-IV retaining declutch shift shaft 67 is socketed on the gear box casing 1, and III-IV retaining shift fork 71 prongs are stirred the III-IV retaining tooth cover 25 in the III-IV retaining synchronizer assembly 11; It is endwisely slipped articulate III retaining driven gear 24 or IV retaining driven gear 26, I-II retaining declutch shift shaft 65 keeps off declutch shift shaft 67 through being installed in positioning ball 69, retaining spring 68 axially locating in gear box casing 1 positioning hole with III-IV.
Secondary speed change operating rock arm 72 is fixedly connected with secondary speed change shifting block axle 73 in the secondary speed change manipulation assembly 50; Secondary speed change shifting block axle 73 is socketed on the gear box casing 1; And can endwisely slip; Its shifting block is inserted in the allocating slot of height-middle retaining shifting block 75 or the low-retaining shifting block 77 of creeping; Height-middle retaining shifting block 75 and height-middle retaining shift fork 74 is fixedly connected on height-middle retaining declutch shift shaft 76, and height-middle retaining declutch shift shaft 76 is socketed on the gear box casing 1, and height-middle retaining shift fork 74 prongs are stirred the height-middle retaining tooth cover 37 in height-middle retaining engagement cover assembly 14; It is endwisely slipped articulate high retaining driving gear 36 or middle retaining driving gear 38; Low-retaining the shifting block 77 of creeping is fixedly connected on the low-retaining declutch shift shaft 78 of creeping with the low-retaining shift fork 79 of creeping, and the low-retaining declutch shift shaft 78 of creeping is socketed on the gear box casing 1, the low-retaining teeth cover 42 of creeping in low-retaining shift fork 79 prongs of creeping the are stirred low-retaining engagement cover assembly 13 of creeping; It is endwisely slipped articulate duplicate gear 40 or the retaining driven gear 43 of creeping, high-middle retaining declutch shift shaft 76 and the low-retaining declutch shift shaft 78 of creeping are through being installed in positioning ball 81, retaining spring 80 axially locating in gear box casing 1 positioning hole.
The present invention can reach following good effect: after adopting the present invention, make tractor gear quantity be increased to the 16+16 retaining, velocity range expands 0.3～40km/h to, and it is reasonable respectively to keep off velocity distribution, is fit to the demand of farmland, gardens, engineering and hauling operation; It is reasonable that each keeps off differential ratio, and synchronizer gearshift in addition makes shift control lighter, smooth-going, satisfies the requirement of ergonomics, reduces the driver working strength; Through adopting spatial axes is arrangement; Eight prismatic cross section flat housings, thus the distance between lower housing portion and the ground raised, increased the crack, ground; Reduce center of gravity and complete machine height, improved passing ability and the adaptability of complete machine in field, gardens, engineering and hauling operation greatly.Comprehensively above-mentioned, this middle power wheeled tractor transmission case gear is many, and velocity distribution is reasonable; It is wide to be suitable for operating range, and transmission efficiency is high, and it is light to shift gears; Center of gravity is low, and passing ability is good, is equipped with this transmission case and will promotes middle power wheeled tractor complete machine performance greatly; Promote its competitive ability in like product, can obtain abundant economic benefit, have broad application prospects.
Description of drawings
Accompanying drawing 1 is the layout sectional view for existing technology middle power wheeled tractor transmission case axle.
Accompanying drawing 2 launches schematic representation for middle power wheeled tractor transmission case transmission line of the present invention.
Accompanying drawing 3 is middle power wheeled tractor transmission case A-A sectional view of the present invention.
Accompanying drawing 4 is middle power wheeled tractor transmission case E-E of the present invention partial section.
Accompanying drawing 5 is middle power wheeled tractor transmission case B-B sectional view of the present invention.
Accompanying drawing 6 is middle power wheeled tractor transmission case F-F of the present invention partial section.
Accompanying drawing 7 is middle power wheeled tractor transmission case C-C sectional view of the present invention.
Accompanying drawing 8 is middle power wheeled tractor transmission case D-D sectional view of the present invention.
Accompanying drawing 9 is middle power wheeled tractor transmission case G-G of the present invention partial section.
Embodiment
Present embodiment is shown in accompanying drawing 2～9, and the middle power wheeled tractor transmission case comprises: gear box casing 1, rear axle housing body 2, main clutch axle assembly 3, main transformer speed driving shaft assembly 4, idler shaft assembly 5, main transformer speed driven shaft assembly 6, secondary speed change gear axle assembly 7, creep retaining gear shaft assembly 8, bevel pinion axle assembly 9 and reversing maneuver assembly 48, main transformer speed are handled assembly 49, secondary speed change is handled assembly 50.Gear box casing 1 rear axle housing body 2 usefulness fastening pieces link to each other; Main clutch axle assembly 3, main transformer speed driving shaft assembly 4, idler shaft assembly 5 main transformers speed driven shaft assembly 6, reversing maneuver assembly 48 and main transformer speed are handled assembly 49 and are assemblied in the gear box casing 1; Pair speed change gear axle assembly 7, creep retaining gear shaft assembly 8, bevel pinion axle assembly 9 and secondary speed change are handled assembly 50 and are assemblied in the rear axle housing body 2; Gear box casing 1 and rear axle housing body 2 inner each employing spatial arrangement form make it present flat eight prismatic profiles.
Wherein main clutch axle assembly 3 (shown in accompanying drawing 2) comprises main clutch axle 15, forward gear driving gear 17, retaining driving gear 19 falls back; On main-gear box housing 1, forward gear driving gear 17 is connected on the main clutch axle 15 through spline with the retaining driving gear 19 that falls back main clutch axle 15 through the bearing freely-supported.
Main transformer speed driving shaft assembly 4 (shown in accompanying drawings 2) comprise main transformer speed driving shaft 22, forward gear driven gear 16, the retaining driven gear 20 that falls back, I retaining driving gear 21, II retaining driving gear 23, III retaining driving gear 24, IV retaining driving gear 26, switching-over synchronizer assembly 10 and III-IV retaining synchronizer assembly 11; Main transformer speed driving shaft 22 passes through bearings on main-gear box housing 1; Forward gear driven gear 16, the retaining driven gear 20 that falls back, III retaining driving gear 24, IV retaining driving gear 26 skies are enclosed within on the main transformer speed driving shaft 22, and I retaining driving gear 21, II retaining driving gear 23, switching-over synchronizer assembly 10 and III-IV retaining synchronizer assembly 11 are connected on the main transformer speed driving shaft 22 through spline.
Idler shaft assembly 5 (shown in accompanying drawing 2) comprises the idler shaft 27 and the retaining idle pulley 28 that falls back; On main-gear box housing 1, the retaining idle pulley 28 that falls back is connected idler shaft 27 through spline to idler shaft 27 through the bearing freely-supported.
Main transformer speed driven shaft assembly 6 (shown in accompanying drawings 2) comprise main transformer speed driven shaft 34, I retaining driven gear 29, II retaining driven gear 31, III retaining driven gear 32, IV retaining driven gear 33 and I-II retaining synchronizer assembly 12; Main transformer speed driven shaft 34 passes through the bearing freely-supported on main-gear box housing 1; I retaining driven gear 29, II retaining driven gear 31 skies are enclosed within on the main transformer speed driving shaft 34, and III retaining driven gear 32, IV retaining driven gear 33 and I-II retaining synchronizer assembly 12 are connected on the main transformer speed driving shaft 34 through spline.
Secondary speed change gear axle assembly 7 (shown in accompanying drawings 2) comprise that secondary change gear shaft 35, high retaining driving gear 36, middle retaining driving gear 38 and height-middle retaining engagement overlap assembly 14; On rear axle housing body 2, high retaining driving gear 36, middle retaining driving gear 38 skies are enclosed within on the secondary change gear shaft 35 secondary change gear shaft 35 through the bearing freely-supported, and high-middle retaining engagement cover assembly 14 is connected on the secondary change gear shaft 35 through internal spline.
Retaining gear shaft assembly 8 (shown in the accompanying drawings 2) of creeping comprise creep the retaining gear shaft 45 and the retaining gear 41 of creeping; The retaining gear shaft 45 of creeping passes through the bearing freely-supported on rear axle housing body 2, and the retaining gear 41 of creeping is connected on the retaining gear shaft 45 of creeping through spline.
Bevel pinion axle assembly 9 (shown in accompanying drawing 2) comprises small coning gear shaft 47, duplicate gear 40, the retaining driven gear 43 of creeping, forerunner's driving gear 39, high retaining driven gear 44, middle retaining driven gear 46 and the low-retaining engagement cover assembly 13 of creeping; Small coning gear shaft 47 passes through the bearing freely-supported on rear axle housing body 2; Duplicate gear 40, retaining driven gear 43 skies of creeping are enclosed within on the small coning gear shaft 47, and forerunner's driving gear 39, high retaining driven gear 44, middle retaining driven gear 46 and the low-retaining engagement cover assembly 13 of creeping are connected on the small coning gear shaft 47 through spline.
Reversing maneuver assembly 48 (like accompanying drawing 3, shown in 4) comprises limiting board 51, switching-over Rocker arm 52, switching-over shifting block axle 53, switching-over shift fork 54, cotter pin 55, retaining spring 56, positioning ball 57, switching-over declutch shift shaft 58; Switching-over Rocker arm 52 is fixedly connected with switching-over shifting block axle 53; Switching-over shifting block axle 53 is socketed on the gear box casing 1; And carry out axial limiting through limiting board 51; Its shifting block inserts in the allocating slot of switching-over shift fork 54, and switching-over shift fork 54 is socketed on the switching-over declutch shift shaft 58, and positioning ball 57, retaining spring 56 and cotter pin 55 are installed in switching-over shift fork 54 positioning holes; Switching-over shift fork 54 prongs are stirred the commutating tooth cover 18 in the switching-over synchronizer assembly 10, it is endwisely slipped articulate forward gear driven gear 16 or fall back retaining driven gear 20.Main transformer speed is handled assembly 49 (like accompanying drawing 5,6, shown in 7) and is comprised that main transformer speed rocking arm guide plate 59, I-II retaining rocking arm 60, I-II retaining shifting block axle 61, III-IV retaining rocking arm 62, III-IV retaining shifting block axle 63, I-II retaining shifting block 64, I-II retaining declutch shift shaft 65, III-IV retaining shifting block 66, III-IV retaining declutch shift shaft 67, retaining spring 68, positioning ball 69, I-II retaining shift fork 70, III-IV keep off shift fork 71; Main transformer speed rocking arm guide plate 59 is fixedly connected on the gear box casing 1; I-II retaining rocking arm 60 is fixedly connected with I-II retaining shifting block axle 61, and I-II retaining shifting block axle 61 is socketed on the main transformer speed rocking arm guide plate 59, and through its axial limiting; Its shifting block inserts in the allocating slot of I-II retaining shifting block 64; I-II retaining shifting block 64 is fixedly connected on the I-II retaining declutch shift shaft 65 with I-II retaining shift fork 70, and I-II retaining declutch shift shaft 65 is socketed on the gear box casing 1, and I-II retaining shift fork 70 prongs are stirred the I-II retaining tooth cover 30 in the I-II retaining synchronizer assembly 12; It is endwisely slipped articulate I retaining driven gear 29 or II retaining driven gear 31; III-IV retaining rocking arm 62 is fixedly connected with III-IV retaining shifting block axle 63, and III-IV retaining shifting block axle 63 is socketed on the I-II retaining shifting block axle 61, and through its axial limiting; Its shifting block inserts in the allocating slot of III-IV retaining shifting block 66; III-IV retaining shifting block 66 is fixedly connected on the III-IV retaining declutch shift shaft 67 with III-IV retaining shift fork 71, and III-IV retaining declutch shift shaft 67 is socketed on the gear box casing 1, and III-IV retaining shift fork 71 prongs are stirred the III-IV retaining tooth cover 25 in the III-IV retaining synchronizer assembly 11; It is endwisely slipped articulate III retaining driven gear 24 or IV retaining driven gear 26, I-II retaining declutch shift shaft 65 keeps off declutch shift shaft 67 through being installed in positioning ball 69, retaining spring 68 axially locating in gear box casing 1 positioning hole with III-IV.
Secondary speed change is handled assembly 50 (like accompanying drawing 8, shown in 9) and is comprised secondary speed change operating rock arm 72, secondary speed change shifting block axle 73, high-middle retaining shift fork 74, high-middle retaining shifting block 75, high-middle retaining declutch shift shaft 76, low-the retaining shifting block 77 of creeping, low-the retaining declutch shift shaft 78 of creeping, low-creep retaining shift fork 79, retaining spring 80, positioning ball 81; Secondary speed change operating rock arm 72 is fixedly connected with secondary speed change shifting block axle 73; Secondary speed change shifting block axle 73 is socketed on the gear box casing 1; And can endwisely slip; Its shifting block is inserted in the allocating slot of height-middle retaining shifting block 75 or the low-retaining shifting block 77 of creeping; Height-middle retaining shifting block 75 and height-middle retaining shift fork 74 is fixedly connected on height-middle retaining declutch shift shaft 76, and height-middle retaining declutch shift shaft 76 is socketed on the gear box casing 1, and height-middle retaining shift fork 74 prongs are stirred the height-middle retaining tooth cover 37 in height-middle retaining engagement cover assembly 14; It is endwisely slipped articulate high retaining driving gear 36 or middle retaining driving gear 38; Low-retaining the shifting block 77 of creeping is fixedly connected on the low-retaining declutch shift shaft 78 of creeping with the low-retaining shift fork 79 of creeping, and the low-retaining declutch shift shaft 78 of creeping is socketed on the gear box casing 1, the low-retaining teeth cover 42 of creeping in low-retaining shift fork 79 prongs of creeping the are stirred low-retaining engagement cover assembly 13 of creeping; It is endwisely slipped articulate duplicate gear 40 or the retaining driven gear 43 of creeping, high-middle retaining declutch shift shaft 76 and the low-retaining declutch shift shaft 78 of creeping are through being installed in positioning ball 81, retaining spring 80 axially locating in gear box casing 1 positioning hole.
Power combines to import into this middle power wheeled tractor transmission case through main clutch; Articulate the switching-over synchronizer assembly 10 selection forward gear or the retainings that fall back through handling reversing maneuver assembly 48; Handle main transformer speed then and handle that assembly 49 articulates I-II retaining synchronizer assembly 12 or III-IV retaining synchronizer assembly 11 is selected a certain gear in I, II, III, IV four retainings; Handling secondary speed change simultaneously handles assembly 50 and articulates height-middle retaining engagement cover assembly 14 or the low-retaining engagement cover assembly 13 of creeping and select a certain gear in high, medium and low, four retainings of creeping; Power direct transfers via switching-over synchronizer assembly 10 or oppositely; Then by I-II retaining synchronizer assembly 12 or III-IV retaining synchronizer assembly 11 speed changes; Then reach central transmission system after the speed change once more, divide supplementary biography ransaxle forwards, backwards again, thereby realize the purpose of 16+16 retaining travelling speed by high-middle retaining engagement cover assembly 14 or the low-retaining engagement cover assembly 13 of creeping.
Claims (10)
1. a middle power wheeled tractor gearbox comprises that gear box casing (1), rear axle housing body (2), main clutch axle assembly (3), main transformer speed driving shaft assembly (4), idler shaft assembly (5), main transformer speed driven shaft assembly (6), secondary speed change gear axle assembly (7), the retaining gear shaft assembly (8) of creeping, bevel pinion axle assembly (9), reversing maneuver assembly (48), main transformer speed are handled assembly (49), secondary speed change is handled assembly (50); It is characterized in that: gear box casing (1) rear axle housing body (2) links to each other with fastening piece; Main clutch axle assembly (3), main transformer speed driving shaft assembly (4), idler shaft assembly (5), main transformer speed driven shaft assembly (6), reversing maneuver assembly (48) and main transformer speed are handled assembly (49) and are assemblied in the gear box casing (1); Secondary speed change gear axle assembly (7), creep retaining gear shaft assembly (8), bevel pinion axle assembly (9) and secondary speed change are handled assembly (50) and are assemblied in the rear axle housing body (2); Inner each the employing spatial arrangement form of gear box casing (1) and rear axle housing body (2) makes its outside present flat eight prismatic exterior cross-section.
2. middle power wheeled tractor gearbox according to claim 1; It is characterized in that: on main-gear box housing (1), the forward gear driving gear (17) and the retaining driving gear (19) that falls back are connected on the main clutch axle (15) through spline the main clutch axle (15) in the described main clutch axle assembly (3) through the bearing freely-supported.
3. middle power wheeled tractor gearbox according to claim 1; It is characterized in that: the main transformer speed driving shaft (22) in the described main transformer speed driving shaft assembly (4) passes through the bearing supported at three point on main-gear box housing (1); Forward gear driven gear (16), the retaining driven gear (20) that falls back, III retaining driving gear (24), IV retaining driving gear (26) sky are enclosed within on the main transformer speed driving shaft (22), and I retaining driving gear (21), II retaining driving gear (23), switching-over synchronizer assembly (10) and III-IV retaining synchronizer assembly (11) are connected on the main transformer speed driving shaft (22) through spline.
4. middle power wheeled tractor gearbox according to claim 1; It is characterized in that: on main-gear box housing (1), the retaining idle pulley (28) that falls back is connected idler shaft (27) through spline to the idler shaft (27) in the described idler shaft assembly (5) through the bearing freely-supported.
5. middle power wheeled tractor gearbox according to claim 1; It is characterized in that: the main transformer speed driven shaft (34) in the described main transformer speed driven shaft assembly (6) passes through the bearing freely-supported on main-gear box housing (1); I retaining driven gear (29), II retaining driven gear (31) sky are enclosed within on the main transformer speed driving shaft (34), and III retaining driven gear (32), IV retaining driven gear (33) and I-II retaining synchronizer assembly (12) are connected on the main transformer speed driving shaft (34) through spline.
6. middle power wheeled tractor gearbox according to claim 1; It is characterized in that: the secondary change gear shaft (35) in the described secondary speed change gear axle assembly (7) passes through the bearing freely-supported on rear axle housing body (2); High retaining driving gear (36), middle retaining driving gear (38) sky are enclosed within on the secondary change gear shaft (35), and high-middle retaining engagement cover assembly (14) is connected on the secondary change gear shaft (35) through internal spline.
7. middle power wheeled tractor gearbox according to claim 1; It is characterized in that: on rear axle housing body (2), the retaining gear (41) of creeping is connected on the retaining gear shaft (45) of creeping through spline the retaining gear shaft (45) of creeping in the described retaining gear shaft assembly (8) of creeping through the bearing freely-supported.
8. middle power wheeled tractor gearbox according to claim 1; It is characterized in that: the small coning gear shaft (47) in the described bevel pinion axle assembly (9) passes through the bearing freely-supported on rear axle housing body (2); Duplicate gear (40), retaining driven gear (43) sky of creeping are enclosed within on the small coning gear shaft (47), and forerunner's driving gear (39), high retaining driven gear (44), middle retaining driven gear (46) and the low-retaining engagement cover assembly (13) of creeping are connected on the small coning gear shaft (47) through spline.
9. middle power wheeled tractor gearbox according to claim 1; It is characterized in that: switching-over rocking arm (52) is fixedly connected with switching-over shifting block axle (53) in the described reversing maneuver assembly (48); Switching-over shifting block axle (53) is socketed on the gear box casing (1); And carry out axial limiting through limiting board (51), and its shifting block inserts in the allocating slot of switching-over shift fork (54), and switching-over shift fork (54) is socketed on the switching-over declutch shift shaft (58); Positioning ball (57), retaining spring (56) and cotter pin (55) are installed in switching-over shift fork (54) positioning hole; Switching-over shift fork (54) prong is stirred the commutating tooth cover (18) in the synchronizer assembly (10) that commutates, and it is endwisely slipped articulate forward gear driven gear (16) or fall back retaining driven gear (20): main transformer speed is handled the middle main transformer speed rocking arm guide plate of assembly (49) (50) and is fixedly connected on the gear box casing (1), and I-II retaining rocking arm (60) is fixedly connected with I-II retaining shifting block axle (61); I-II retaining shifting block axle (61) is socketed on the main transformer speed rocking arm guide plate (59); And through its axial limiting, its shifting block inserts in the allocating slot of I-II retaining shifting block (64), and I-II retaining shifting block (64) and I-II retaining shift fork (70) are fixedly connected on the I-II retaining declutch shift shaft (65); I-II retaining declutch shift shaft (65) is socketed on the gear box casing (1); I-II retaining shift fork (70) prong is stirred the I-II retaining tooth cover (30) in the I-II retaining synchronizer assembly (12), it is endwisely slipped articulate I retaining driven gear (29) or II retaining driven gear (31), and III-IV retaining rocking arm (62) is fixedly connected with III-IV retaining shifting block axle (63); III-IV retaining shifting block axle (63) cover is by on I-II retaining shifting block axle (61); And through its axial limiting, its shifting block inserts in the allocating slot of III-IV retaining shifting block (66), and III-IV retaining shifting block (66) and III-IV retaining shift fork (71) are fixedly connected on the III-IV retaining declutch shift shaft (67); III-IV retaining declutch shift shaft (67) is socketed on the gear box casing (1); III-IV retaining shift fork (71) prong is stirred the III-IV retaining tooth cover (25) in the III-IV retaining synchronizer assembly (11), it is endwisely slipped articulate III retaining driven gear (24) or IV retaining driven gear (26), and I-II retaining declutch shift shaft (65) and III-IV retaining declutch shift shaft (67) are through being installed in positioning ball (69), retaining spring (68) axially locating in gear box casing 1 positioning hole.
10. middle power wheeled tractor transmission case according to claim 1; It is characterized in that: secondary speed change operating rock arm (72) is fixedly connected with secondary speed change shifting block axle (73) in the described secondary speed change manipulation assembly (50); Secondary speed change shifting block axle (73) is socketed on the gear box casing (1); And can endwisely slip; Its shifting block is inserted in the allocating slot of height-middle retaining shifting block (75) or the low-retaining shifting block (77) of creeping; Height-middle retaining shifting block (75) and height-middle retaining shift fork (74) is fixedly connected on height-middle retaining declutch shift shaft (76), and height-middle retaining declutch shift shaft (76) is socketed on the gear box casing (1), and height-middle retaining shift fork (74) prong is stirred the height-middle retaining tooth cover (37) in height-middle retaining engagement cover assembly (14); It is endwisely slipped articulate high retaining driving gear (36) or middle retaining driving gear (38); Low-retaining the shifting block (77) of creeping is fixedly connected on low-retaining declutch shift shaft (78) of creeping with the low-retaining shift fork (79) of creeping, and the low-retaining declutch shift shaft (78) of creeping is socketed on the gear box casing (1), low-retaining shift fork (79) prong of creeping stir in the low-retaining engagement cover assembly (13) of creeping low-creep and keep off tooth cover (42); It is endwisely slipped articulate duplicate gear (40) or the retaining driven gear (43) of creeping, height-middle retaining declutch shift shaft (76) and the low-retaining declutch shift shaft (78) of creeping are through being installed in positioning ball (81), retaining spring (80) axially locating in gear box casing (1) positioning hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101276237A CN101793310B (en) | 2010-03-19 | 2010-03-19 | Transmission case of wheeled tractor with medium power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101276237A CN101793310B (en) | 2010-03-19 | 2010-03-19 | Transmission case of wheeled tractor with medium power |
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| Publication Number | Publication Date |
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| CN101793310A CN101793310A (en) | 2010-08-04 |
| CN101793310B true CN101793310B (en) | 2012-02-01 |
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| CN2010101276237A Expired - Fee Related CN101793310B (en) | 2010-03-19 | 2010-03-19 | Transmission case of wheeled tractor with medium power |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103925346B (en) * | 2014-03-24 | 2016-08-17 | 第一拖拉机股份有限公司 | Synchronous communicating band creeper gear gear box of tractor |
| CN104653720B (en) * | 2015-02-13 | 2017-03-01 | 河南省力神机械有限公司 | Tractor portion power shift transmissions device |
| CN109899461B (en) * | 2019-03-28 | 2024-01-26 | 第一拖拉机股份有限公司 | Tractor transmission device with power reversing and synchronous gear shifting for medium and small power |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2350242Y (en) * | 1998-12-25 | 1999-11-24 | 安徽六安手扶拖拉机厂 | Tractor speed change box |
| CN2685661Y (en) * | 2004-03-26 | 2005-03-16 | 张义华 | Horizontal nine-axle hand tractor gear box body |
| CN201651251U (en) * | 2010-03-19 | 2010-11-24 | 中国一拖集团有限公司 | Medium-power wheeled tractor transmission case |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4616321B2 (en) * | 2007-10-18 | 2011-01-19 | 株式会社クボタ | Transmission device for traveling vehicle |
-
2010
- 2010-03-19 CN CN2010101276237A patent/CN101793310B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2350242Y (en) * | 1998-12-25 | 1999-11-24 | 安徽六安手扶拖拉机厂 | Tractor speed change box |
| CN2685661Y (en) * | 2004-03-26 | 2005-03-16 | 张义华 | Horizontal nine-axle hand tractor gear box body |
| CN201651251U (en) * | 2010-03-19 | 2010-11-24 | 中国一拖集团有限公司 | Medium-power wheeled tractor transmission case |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101793310A (en) | 2010-08-04 |
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