CN2435268Y - Ten-gear variable-speed box for four-wheel tractor - Google Patents

Abstract

The utility model relates to a ten-gear variable-speed box for a four-wheel tractor, which is mainly formed by that five transmission shafts and corresponding transmission gears arranged on the five transmission shafts are arranged in a variable-speed box body. The utility model is characterized in that a duplex range-shift shifting slide gear is arranged on a I shaft; a constant-mesh gear, a range-shift high-speed sector gear and a range-shift low-speed sector gear are arranged on a II shaft; the constant mesh gear of a III shaft, a V-gear and a IV-gear are arranged on the III shaft; a duplex IVV-gear shifting slide gear and II back-gear shifting slide gear are arranged on a IV shaft. Under the condition that the axis distance of the utility model is identical with the prior art, the variable-speed box can increase four forward gears and one reverse gear, realizing ten forward gears and two reverse gears; the utility model can increase using performance, and can satisfy the market requirements of the power boosting of tractors.

Description

Ten grades of change speed gear boxs of four-wheeled tractor

The utility model relates to a kind of four-wheeled tractor change speed gear box, particularly ten grades of change speed gear boxs of four-wheeled tractor.It is applicable to below 40 horsepowers, the trac. of belt or direct connection transmission and end of tape transmission.

At present, the change speed gear box of the belt-driving type small four-wheel tractor that China produces, its gear speed change is 6 D Drives and 1 backward gear.This change speed gear box is by casing and be positioned at casing and be that space parallel is arranged and the I axle, II axle, III axle, IV axle, the V axle that link to each other with casing constitute.The I shaft gear is housed on the I axle; The secondary variable gear of duplex is housed on the II axle; The secondary speed change shifting slide gear of duplex is housed, IV VI shelves gear, II V shelves gear and I III shelves gear on the III axle; On the IV axle reduction pinion teeth is housed, II V shelves shifting slide gear and duplex I III IV VI shelves shifting slide gear; Deceleration big gear wheel and V shaft gear are housed on the V axle.When rotating under the effect of I axle at engine power, can be by I shaft gear on it and the secondary speed change big gear wheel engagement of the duplex on the II axle, driving the II axle rotates, at this moment, the secondary change speed pinion of duplex on the II axle is meshed with the secondary speed change slippage big gear wheel of duplex on the III axle again, driving the III axle rotates, again by the II V shelves gear on the III axle, IV VI shelves gear, I III shelves gear respectively with the IV axle on the engagement of II V shelves shifting slide gear, I III IV VI shelves shifting slide gear, can realize I, II, the IV gear speed change of advancing.The secondary speed change shifting slide gear of duplex on the mobile III axle meshes the secondary speed change big gear wheel on its miniature gears and the II axle, can realize the III V VI gear speed change of advancing again.The secondary speed change big gear wheel of duplex on the I shaft gear on the I axle and II axle is meshed, and when driving the II axle and rotating, II V shelves shifting slide gear meshes on the secondary change speed pinion of the duplex on the II axle and the IV axle, can realize reverse gear.Because the gear speed change span of this kind change speed gear box is big, keeping under each axis hole width between centers unmodified situation of change speed gear box, because of the gearbox designs restriction, difficult increase advance gear and high speed reverse position, be difficult to satisfy user's use needs, simultaneously, also be difficult to satisfy the market development needs that horsepower increases, gear increases of trac..

The purpose of this utility model is to provide a kind of four-wheeled tractor ten grades of change speed gear boxs, it can overcome the deficiency of prior art, and can make change speed gear box under each axis hole width between centers situation identical with prior art axis hole width between centers, increase by four D Drives and a high reverse gear, dwindle the gear speed spread thereby reach, increase the purpose of speed change gear, can realize ten D Drives, two backward gears.

Its solution is: be provided with in the gear box with casing bonded assembly I axle, II axle, III axle, IV axle and V axle, each axis hole width between centers is identical with prior art axis hole width between centers.The secondary speed change shifting slide gear of duplex is installed on the I axle; II axle constant mesh gear is installed successively, the secondary speed change low speed section gear and the secondary speed change high-velocity section gear that are meshed with the secondary speed change shifting slide gear of the duplex on the I axle, and reverse gearwheel on the II axle; The III axle constant mesh gear that is meshed with II axle constant mesh gear on the II axle is installed successively, V shelves gear, IV shelves gear, II shelves gear, III shelves gear and I shelves gear on the III axle; Reduction pinion teeth is installed on the IV axle successively, the duplex IV V shelves shifting slide gear that is meshed with V shelves gear and IV shelves gear respectively, respectively with the III axle on II shelves gear and the II reverse gear shifting slide gear that is meshed of the reverse gearwheel on the II axle, and respectively with the III axle on III shelves gear and the duplex I III shelves shifting slide gear that is meshed of I shelves gear.When power is delivered to the V axle from the I axle by the engagement that each goes up respective gears, deceleration big gear wheel on the V axle and V shaft gear are delivered to diff, thereby can realize ten D Drives, the gear speed change of two backward gears.

The secondary speed change shifting slide gear of the duplex of installing on the I axle, the number of teeth of its big gear wheel is 37-41, the number of teeth of miniature gears is 17-21; The II axle constant mesh gear of installing on the II axle, its number of teeth are 19-23, and secondary its number of teeth of speed change low speed section gear is 34-38, and secondary its number of teeth of speed change high-velocity section gear is 15-19; Its number of teeth of III axle constant mesh gear of installing on the III axle is 30-34; Its number of teeth of V shelves gear is 37-41; Its number of teeth of IV shelves gear is 35-39; The duplex IV V shelves shifting slide gear of installing on the IV axle, its big gear wheel number of teeth are 19-23; The miniature gears number of teeth is 17-21; Its number of teeth of II reverse gear shifting slide gear is 31-35.

Keeping under each axis hole width between centers of change speed gear box situation identical with prior art axis hole width between centers, needing increase cabinets cavity size, the cabinets cavity size H after the increase is between the 250-300mm.

The utility model mainly is arranged on the secondary speed change shifting slide gear of duplex is installed on the interior I axle of casing, II axle constant mesh gear mainly is installed on the II axle, secondary speed change high, low speed section gear, III axle constant mesh gear, V shelves gear, IV shelves gear mainly are installed on the III axle, duplex IV V shelves shifting slide gear and II reverse gear shifting slide gear mainly are installed on the IV axle.This change speed gear box is under maintenance and each axis hole width between centers unmodified situation of prior art, comparable prior art increases by four D Drives and a backward gear, thereby realize ten D Drives and two backward gears, and the high speed that can make change speed gear box and low speed is more than doubling.In addition, because the increase of speed change gear, can make the user according to different job requirements and load, change speed, reasonably select work speed, thereby can improve in-use performance, obtain favorable economic benefit, simultaneously, also can satisfy trac. horsepower and increase the requirement of the market trend that gear increases.Axis hole width between centers owing to each axis hole width between centers of change speed gear box and prior art remains unchanged again, thereby can guarantee good technology inheritance and economy effectively.

Embodiment of the present utility model is described in detail in conjunction with the accompanying drawings.

Fig. 1 is that ten grades of change speed gear box power transmission lines of four-wheeled tractor and gear mesh concern scheme drawing.

Fig. 2 is that each axis hole position of ten grades of gear boxes of four-wheeled tractor concerns scheme drawing.

Fig. 3 is the N-N sectional stretch-out view among Fig. 2.

Among Fig. 1, Fig. 2, Fig. 3, in gear box 24, have to be the transmission I axle 2 that space parallel is arranged, II axle 7, III axle 11, IV axle 14, V axle 16 and diff semiaxis all are connected with casing 24 by bearing.Wheelbase between them is respectively: the width between centers A=84mm between I axle 2 and the II axle 7, width between centers B=79.5mm between II axle 7 and the III axle 11, width between centers C=88.5mm between III axle 11 and the IV axle 14, width between centers D=74.5mm between II axle 7 and the IV axle 14, width between centers E=112mm between IV axle 14 and the V axle 16, the width between centers F=148mm between V axle 16 and the diff semiaxis.The secondary speed change shifting slide gear 1 of duplex is installed on the I axle 2, and the number of teeth of its big gear wheel 1b is 39, and the number of teeth of miniature gears 1a is 19.II axle constant mesh gear 6 is installed on the II axle 7 from left to right successively, and its number of teeth is 21, secondary speed change low speed section gear 5, and its number of teeth is 36, secondary speed change high-velocity section gear 4, its number of teeth is 17, and reverse gearwheel 3, its number of teeth is 17.III axle constant mesh gear 10 is installed on the III axle from left to right successively, and its number of teeth is 32, V shelves gear 9, and its number of teeth is 39, IV shelves gear 8, its number of teeth are 37, II shelves gear 21, and its number of teeth is 26, III shelves gear 22, its number of teeth are 32, I shelves gear 23, and its number of teeth is 19.Reduction pinion teeth 13 is installed on the IV axle from left to right successively, its number of teeth is 17, duplex IV V shelves shifting slide gear 12, the number of teeth of its big gear wheel 12a is 21, the number of teeth of miniature gears 12b is 19, and II reverse gear shifting slide gear 20 its numbers of teeth are 33, duplex I III shelves shifting slide gear 19, the number of teeth of its big gear wheel 19a is 39, and the number of teeth of miniature gears 19b is 27.Deceleration big gear wheel 15 is installed on the V axle from left to right successively, and its number of teeth is 47, V shaft gear 18, and its number of teeth is 24.

During work, the drive path of each grade of change speed gear box is as follows: when engine power by cone belt and clutch transmits to change speed gear box I axle 2 and when driving I axle 2 and rotating, secondary speed change slippage miniature gears 1a of duplex on the I axle 2 and 5 engagements of secondary speed change low speed section gear, driving II axle 7 rotates, II axle constant mesh gear 6 on the II axle 7 and 10 engagements of III axle constant mesh gear, driving III axle 11 rotates, I shelves gear 23 on the III axle 11 meshes with the big gear wheel 19a of duplex I III shelves shifting slide gear, driving IV wheel 14 rotates, reduction pinion teeth 13 on the IV axle 14 and 15 engagements of deceleration big gear wheel, driving V axle 16 rotates, V shaft gear 18 on the V axle 16 and 17 engagements of the diff big gear wheel on the diff semiaxis, the drive differential axle rotates, and can realize 1 grade of speed change.And the like, when secondary speed change slippage miniature gears 1a of duplex and 5 engagements of secondary speed change low speed section gear, conversion duplex I III shelves shifting slide gear 19, II reverse gear shifting slide gear 20, the engage position of duplex IV, V shelves shifting slide gear 12, can realize speed and a reverse speed of I, II, III, IV, five D Drives of V, be referred to as main transformer speed.The secondary speed change slippage of duplex on I axle 2 miniature gears 1a breaks away from, make secondary speed change slippage big gear wheel 1b of duplex and 4 engagements of secondary speed change high-velocity section gear, meshing relation between each gear of other meshing relation and main transformer speed is identical, can realize the speed of five D Drive speed of VI VII VII IX X and the shelves of falling the II again, be referred to as secondary speed change.Thereby the speed change of ten advance gear speed change and two gears that fall back can realizing four-wheeled tractor.

Claims (3)

1, ten grades of change speed gear boxs of a kind of four-wheeled tractor, the I axle that comprises casing and interior setting thereof, the II axle, the III axle, the IV axle, the V axle, to the V axle, corresponding engaging gear is installed in I, it is characterized in that on I axle (2), being equipped with the secondary speed change shifting slide gear (1) of duplex, II axle constant mesh gear (6) is installed on the II axle (7) successively, the secondary speed change lower curtate gear (5) and secondary speed change high-velocity section gear (4) and the reverse gearwheel (3) that are meshed with the secondary speed change shifting slide gear of duplex on the I axle (2) (1), the III axle constant mesh gear (10) that is meshed with II axle constant mesh gear (6) on the II axle is installed on the III axle (11) successively, V shelves gear (9), IV shelves gear (8), II shelves gear (21), III shelves gear (22) and I shelves gear (23), reduction pinion teeth (13) is installed on the IV axle (14) successively, respectively with III axle (11) on V shelves gear (9) and the duplex IV V shelves shifting slide gears (12) that are meshed of IV shelves gear (8), respectively with III axle (11) on II shelves gear (21) and the II reverse gear shifting slide gear (20) that is meshed of the reverse gearwheel (3) on the II axle (7), and respectively with III axle (11) on III shelves gear (22) and the duplex I III shelves shifting slide gears (19) that are meshed of I shelves gear (23).

2, as claim 1 fast ten grades of change speed gear boxs of four-wheeled tractor, it is characterized in that being installed in the secondary speed change shifting slide gear (1) of duplex on the I axle (2), the number of teeth of its big gear wheel (1b) is 37-41, the number of teeth of miniature gears (1a) is 17-21, be installed in the II axle constant mesh gear (6) on the II axle (7), its number of teeth is 19-23, secondary its number of teeth of speed change low speed section gear (5) is 34-38, secondary its number of teeth of speed change high-velocity section gear (4) is 15-19, its number of teeth of III axle constant mesh gear (10) of installing on the III axle is 30-34, its number of teeth of V shelves gear (9) is 37-41, its number of teeth of IV shelves gear (8) is 35-39, be installed in the duplex IV V shelves shifting slide gears (12) on the IV axle, the number of teeth of its big gear wheel (12a) is 19-23, the number of teeth of miniature gears (12b) is 17-21, and its number of teeth of II reverse gear shifting slide gear (20) is 31-35.

3, as claim 1 fast ten grades of change speed gear boxs of four-wheeled tractor, the inner cavity size H that it is characterized in that gear box (24) is between the 250-300mm.

Images