CN2245549Y - Combined rear axle speed variator for agricultural tricycle carrier vehicle - Google Patents

Abstract

The utility model relates to a change gear driving device for an agricultural three-wheel carrier vehicle. Compared with a four-speed variator of a single or double shifting forks of a combined rear axle of the present general agricultural three-wheel carrier vehicle, the utility model is characterized in that a duplicate gear is arranged on two shafts, and comprises a small gear and a big gear. The utility model has a first gear, a second gear, a third gear and a fourth gear four forward gears and a backward gear and increases the variation ratio of the first gear and reduce the variation ratio of the fourth gear so as to make each forward gear have reasonable speed ratio distribution and small the gap of the speed ratio.

Description

The conjuncted rear axle transmission of agricultural three-wheel transporter

The utility model relates to agricultural three-wheel transporter change gear transmission device.

At present the conjuncted rear axle transmission of general-duty agricultural three-wheel transporter is single shift fork four-speed gear box or two shift fork four-speed gear box, has three advance gear and one and retreats gear.The Speed Ratio Distribution that these change-speed boxs not only have the gear that respectively advances is unreasonable, converter speed ratio is little when a retaining, the speed of a motor vehicle is higher, hill climbing ability is low during rated load, poor to rugged road adaptive capacity, and the gear speed ratio gap of respectively advancing is big, and the speed of retaining and retaining can not be connected, cause the unexpected impact between the gear during gearshift easily, the service life of having reduced gear.

The purpose of this utility model is a kind of conjuncted rear axle transmission of agricultural three-wheel transporter that the gear Speed Ratio Distribution is reasonable, the speed ratio gap is little that respectively advances of design.

The conjuncted rear axle transmission of this agricultural three-wheel transporter comprises housing, the shift fork fix shaft is housed in the inner chamber of housing, one, two, three, four and power take-off shaft, shift fork fix shaft and two two ends directly are fixed on the housing, one, three, four are bearing on the housing by bearing, 234 retaining shifting fork assemblies and a retaining back fork assembly are housed on the shift fork fix shaft, four retaining driving gears are housed on one, 234 retaining cliding gears and one keep off the cliding gear that reverses gear, three driving gears are housed on three, three ring gears, whole hero of biography moving gear is housed on four and keeps off the passive wheel of nibbling with four retaining driving gear ingears four, with four ring gears of three driving gear ingears, power take-off shaft comprises differential assembly, be fixed on the differential assembly and and pass big gear wheel eventually with whole hero of biography moving gear ingear, one retaining rocking arm one end and that reverses gear keeps off the back fork assembly and is connected, the other end stretches out housing, 234 retaining rocking arms, one end is connected with 234 retaining shifting fork assemblies, the other end stretches out housing, on two, dual gear is housed, this dual gear comprises miniature gears and big gear wheel, big gear wheel can with reverse gear cliding gear engagement of a retaining, miniature gears can mesh with 234 retaining cliding gears, 234 retaining cliding gears can also with four ring gears, four retaining driving gears engagements.

This change-speed box is owing to be provided with dual gear, stir 234 retaining cliding gears by shifting fork assembly, make it the pinion with this dual gear, increased the gear that advances---two retainings, therefore, have advance gear and one of a retaining, two retainings, three retainings, four these four on retainings and retreat gear.By changing the number of teeth of each transmission gear, increase the converter speed ratio of a retaining, reduce the converter speed ratio of four retainings, the increase of one retaining converter speed ratio makes the prompt drop of keeping off a car low, the hill climbing ability when having improved rated load, the reduction of four-speed gear shift ratio, four speed of keeping off a car are improved, made full use of power, make the Speed Ratio Distribution of the gear that advances reasonable.Owing to increased a forward gear, make the speed ratio gap of respectively advancing between the gear little, the impact when having reduced gearshift between the gear has prolonged service life.

Accompanying drawing shows the embodiment of the conjuncted rear axle transmission of agricultural three-wheel transporter, wherein: Fig. 1 is the front view of embodiment, Fig. 2 is the A-A cutaway view of Fig. 1, the drive path figure of change-speed box when Fig. 3 is a retaining, the drive path figure of change-speed box when Fig. 4 is two retainings, Fig. 5 be three when retaining change-speed box drive path figure, the drive path figure of change-speed box when Fig. 6 is four retainings, Fig. 7 is the drive path figure of change-speed box when reversing gear.

In the present embodiment, the conjuncted rear axle transmission of agricultural three-wheel transporter comprises housing 11, shift fork fix shaft 4 is housed in the inner chamber of housing 11, one 18, two 16, three 15, four 9 and power take-off shaft, shift fork fix shaft 4 and two 16 two ends directly are fixed on the housing 11, one 18, three 15, be bearing on the housing 11 by bearing for four 9,234 retaining shifting fork assemblies 3 and a retaining back fork assembly 21 are housed on shift fork fix shaft 4, four retaining driving gears 5 are housed on one 18,234 retaining cliding gears 20 and one keep off the cliding gear 19 that reverses gear, three driving gears 6 are housed on three 15, three ring gears 14, whole hero of biography moving gear 13 is housed on four 9 and keeps off ring gears 8 with four retaining driving gears, 5 ingears four, with four ring gears 7 of three driving gears, 6 ingears, power take-off shaft comprises differential assembly 10, be fixed by bolts on the differential assembly 10 and and pass big gear wheel 12 eventually with whole hero of biography moving gear 13 ingears, power take-off shaft is with on the bearing fixing at both ends axle tube, one retaining rocking arm 1 one ends and that reverse gear keep off back fork assembly 21 and are connected, the other end stretches out housing 11,234 retaining rocking arms, 2 one ends are connected with 234 retaining shifting fork assemblies 3, the other end stretches out housing 11, dual gear 17 is housed on two 16, this dual gear 17 comprises miniature gears and big gear wheel, the facewidth of big gear wheel is 15mm, the facewidth of miniature gears is 2 times of wheel facewidth, during work, drive its shifting fork assembly 21 and stir the retaining cliding gear 19 that reverses gear by reverse gear rocking arm 1 of a retaining, itself and big gear wheel are meshed, drive its shifting fork assemblies 3 by 234 retaining rocking arms 2 and stir 234 retaining cliding gears 20, make itself and pinion.One 18 is power input shaft.

In the present embodiment, one big gear wheel of keeping off reverse gear cliding gear 19 and dual gear 17 is a retaining when meshing, during the pinion of 234 retaining cliding gears 20 and dual gear 17 is two retainings, during with 7 engagements of four ring gears is three retainings, during with the engagement of four retaining driving gears, 5 internally toothed annuluss is four retainings, and one keeps off when reversing gear cliding gear 19 and three ring gears 14 engagements to reversing gear.The converter speed ratio of each forward gear is a retaining 28.42, two retainings 15.18, three retainings 6.781, four retainings 3.01, when the rotating speed of driving engine is 1200-2200 rev/min, the speed of a motor vehicle of each forward gear be a retaining 3.177-5.842 km/hour, two retaining 5.948-10.904 kms/hour, three retaining 13.31-24.41 kms/hour, four retaining 29.99-54.99 kms/hour.

Claims (3)

1, the conjuncted rear axle transmission of a kind of agricultural three-wheel transporter, comprise housing (11), shift fork fix shaft (4) is housed in the inner chamber of housing (11), one (18), two (16), three (15), four (9) and power take-off shaft, shift fork fix shaft (4) and two (16) two ends directly are fixed on the housing (11), one (18), three (15), four (9) are bearing on the housing (11) by bearing, 234 retaining shifting fork assemblies (3) and a retaining back fork assembly (21) are housed on shift fork fix shaft (4), four retaining driving gears (5) are housed on one (18), 234 retaining cliding gears (20) and one keep off the cliding gear (19) that reverses gear, three driving gears (6) are housed on three (15), three ring gears (14), whole hero of biography moving gear (13) is housed on four (9) and keeps off ring gears (8) with four retaining driving gear (5) ingears four, with three driving gears (6), four ring gears of ingear (7), power take-off shaft comprises differential assembly (10), be fixed on differential assembly (10) and upward and with whole hero of biography moving gear (13) ingear pass big gear wheel (12) eventually, one retaining rocking arm (1) one end and that reverses gear keeps off back fork assembly (21) and is connected, the other end stretches out housing (11), 234 retaining rocking arms (2) one ends are connected with 234 retaining shifting fork assemblies (3), the other end stretches out housing (11), it is characterized in that on two (16), being equipped with dual gear (17), this dual gear (17) comprises miniature gears and big gear wheel, big gear wheel can with reverse gear cliding gear (19) engagement of a retaining, miniature gears can mesh with 234 retaining cliding gears (20), 234 the retaining cliding gears (20) can also with four ring gears (7), four the retaining driving gears (5) engagement.

2, according to the conjuncted rear axle transmission of the said agricultural three-wheel transporter of claim 1, it is characterized in that the facewidth of big gear wheel in the dual gear (17) is 15mm, the facewidth of miniature gears is 2 times of wheel facewidth

3, according to the conjuncted rear axle transmission of the said agricultural three-wheel transporter of claim 1, the converter speed ratio that it is characterized in that each forward gear is a retaining 28.42, two retainings 15.18, three retainings 6.781, four retainings 3.01.

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