CN2350242Y

CN2350242Y - Tractor speed change box

Info

Publication number: CN2350242Y
Application number: CN 98251125
Authority: CN
Inventors: 王文德; 惠友刚; 刘开基
Original assignee: LIU'AN WALKING-TRACTOR FACTORY ANHUI PROV
Current assignee: Anhui Changjiang Agriculture Equipment Co., Ltd.
Priority date: 1998-12-25
Filing date: 1998-12-25
Publication date: 1999-11-24
Anticipated expiration: 2008-12-25

Abstract

The utility model relates to a transmission case of a walking tractor, and the utility model is composed of a case body, gear shafts, gears and shifting forks. The utility model is characterized in that the utility model comprises eight shafts, twenty one kinds gears, etc.; the utility model is directly connected with an output shaft of an engine through the shafts, and is especially suitable for carrying out operation in irrigated land or foot field with deep mud; when the utility model is matched with a rotary cultivator, gear engagement and transmission are adopted, the transmission is reliable, and the installation of the rotary cultivator is convenient; serial products of the utility model can be formed when the utility model is matched with diesel engines and gasoline engines with motive power of 4.4 kw to 7 kw.

Description

Gear box of tractor

The utility model relates to the change gear transmission device of vehicle, exactly is the walker tractor change speed gear box.

Domestic existing walker tractor kind is a lot of at present, and mostly be the bead apex connecting-type, on the methods, rack, driving engine and horizontal shaft type change speed gear box stood away before its driving engine was fixed on, power is passed to the power-transfer clutch in the change speed gear box outside by bead apex, and then passes to change speed gear box.Its greatest drawback is because the exposing of bead apex, and the water that easily is stained with mud when paddy-field-working causes too early wearing and tearing, skids, and the driving efficiency of bead apex is not high yet, is this hard nut to crack of paddy field under the indeterminable for a long time walker tractor.

It is direct attachment type that indivedual walker tractors are also arranged in addition, its driving engine direct connection is at the front end of change speed gear box, by power-transfer clutch power is directly passed to longitudinal axis formula change speed gear box, its gearbox body and steering unit are all complicated though its driving device is compact, processing technology complexity, manufacturing cost height are handled effort.

The purpose of this utility model is: provide that a kind of speed change gear is many, volume is little, and simple in structure, processing technology simple, handle the direct-connected walker tractor change speed gear box in labour-saving.

The technical solution that realizes above-mentioned purpose is such.

Gear box of tractor is made up of casing, gear wheel shaft, gear and shift fork, it is characterized in that: this change speed gear box comprises eight axles, 21 kinds of gears etc.,

(1), axle 1 is located at casing middle part one side by bearing, its medial extremity is provided with disjunctor gear Z1, gear Z1 middle part is provided with a coaxial axis hole;

(2), axle 2 and axle 1 are coaxial is located in spool 1 axis hole by bearing one end, the other end is located on the casing, it is provided with the stepped gear of being made up of gear Z3 and Z5;

(3) axle 3 is by the parallel top of being located at axle 2 of bearing, be provided with the stepped gear, the gear Z6 that form by Z2 and Z4 on it successively, and a side of gear Z6 spoke be provided with gear Z4 ingear in engagement gear ring Z6 ', gear Z1 and Z2, gear Z3 and Z4 nibble and are constant-mesh, gear Z6 can mesh with gear Z5 again by shift fork 10, and shift fork 10 is by being located on the casing, and axle 3 axle heads that are positioned at box inside are provided with finishing bevel gear cuter Z7;

(4) axle 4 is located on the casing perpendicular to axle 3 by bearing, and the stepped gear that is provided with finishing bevel gear cuter Z8, gear Z9 on it successively and is made up of gear Z10 and Z11, finishing bevel gear cuter Z7 and Z8 are constant mesh gear;

(5) axle 5 is located on the casing by bearing, and parallel and axle 4, be provided with the stepped gear, gear Z14 and the gear Z15 that form by gear Z12 and Z13 on it successively, can make gear Z9 and gear Z12 engagement by shift fork 12, gear Z10 and Z14 engagement be can make by shift fork 11, or gear Z11 and Z12 engagement made; Shift fork 12, shift fork 11 are by being located on the casing;

(6) axle 6 is located on the casing by bearing, and parallel and axle 5, gear Z16 is located at the middle part of axle 6, be respectively equipped with gear Z17 on gear Z16 two side shafts 6, gear Z13 and Z16 are constant mesh gear, gear Z16 spoke both sides be respectively equipped with the Z17 ingear in the solid Z16 ' of engaging tooth, be arranged with the spring that contacts with the Z17 spoke respectively on the two gear Z17 outer shaft 6;

(7) axle 7 is located on the casing by bearing, and is parallel to axle 6, and its middle part is provided with a pair of gear Z18, is provided with axle sleeve between the two gear Z18, and gear Z17 and Z18 are constant mesh gear, and a pair of shift fork 13 that turns to is located at respectively on the casing above a pair of gear Z17 by axle;

(8) axle 8 is located on the casing by bearing, be positioned at the opposite side of axle 4, and parallel and the axle 4, the axle 5, be provided with the stepped gear, the wide gear Z21 that form by gear Z19 and Z20 on it successively, gear Z19 and Z12, wide gear Z21 and Z11 are constant mesh gear, by shift fork 12 gear Z9 can be meshed with Z20.

One end of axle 2 is located in the axis hole of axle 1 by coaxial bearing, and described bearing is a needle bearing.

The axle of one section of sheathed gear Z6 is a castellated shaft on the axle 3.

Axle 4 is a castellated shaft.

The utlity model has the advantage of six aspects:

1, this change speed gear box collection advantage of shaft gearbox in length and breadth, both kept the horizontal shaft type gearbox designs simple, handle the labour-saving characteristics, cancelled the not high bead apex of its driving efficiency again.

2, because this change speed gear box passes through axle and engine output shaft direct connection, so the vibration that trac. is in operation is less, the operation of special simultaneously adaptation paddy field or deep mud feet fields.

3, the steering unit of this change speed gear box, simple in structure is easy to operate.

4, this gearbox designs compactness, it is reasonable that each keeps off velocity distribution, can realize eight kinds of speed, i.e. and six forward gear speed and two reverse speeds can satisfy the needs of various running conditions such as rotary tillage, ploughing, transportation.

When 5, disposing rotovator, adopt meshed transmission gear, reliable transmission, easy for installation.

6, after this gearbox body is done minimum change, can be complementary, form series of products with bavin, the gasoline of several power of 4.4～7KW.

Fig. 1 is the utility model structural representation.

Fig. 2 is the A-A expansion drawing of Fig. 1,

Fig. 3 is the B-B expansion drawing of Fig. 1,

Fig. 4 is the utility model transmission sketch,

Fig. 5 is each grade of the utility model drive path table.

Form by casing 9, eight axles, 21 kinds of gears (straight-tooth, awl tooth) and four kinds of shift forks by visible this change speed gear box of Fig. 1, Fig. 2 and Fig. 3.

Axle 1 is that the same part of siamesed is a gear wheel shaft with gear Z1, and in casing 9 middle parts one side, gear Z1 middle part has a coaxial axis hole by bearing installation for axle 1.

Axle 2 is coaxial with axle 1, and the one end is installed in by needle bearing in the axis hole of axle 1, and on casing 9, the stepped gear of being made up of gear Z3 and Z5 is installed on the axle 2 other end by bearing installation.

Axle 3 two ends by bearing installation on casing 9, and be parallel to axle 2, the stepped gear of being made up of gear Z2 and Z4 is contained on the axle 3 by bearing carrier ring, and gear Z6 is enclosed within on the axle 3 with spline form sky, be processed with on the side of gear Z6 spoke can with engagement gear ring Z6 ' in the gear Z4 ingear, gear Z1 and Z2, gear Z3 and Z4 are constant-mesh, and shift fork 10 can make gear Z6 slide along axle 3, or meshes with gear Z5, or by interior engagement gear ring Z6 ' and Z4 engagement, shift fork 10 by axle mounting on casing 9.The axle that is positioned at casing 9 inboards is equipped with finishing bevel gear cuter Z7 on 3 axle heads.

Axle 4 be a castellated shaft, is installed on the casing 9 perpendicular to axle 3 by bearing, and finishing bevel gear cuter Z8 is fixedly mounted on the axle 4 with the spline form, and gear Z9 and the stepped gear be made up of gear Z10 and Z11 are enclosed within on spools 4 with spline form sky.Finishing bevel gear cuter Z7 and Z8 are constant mesh gear;

Axle 5 is parallel to axle 4 by bearing and is installed on the casing 9.Fixedly mounting stepped gear, gear Z14 and the gear Z15 of gear Z12 and Z13 composition on it successively by key.The stirring lower gear Z9 and can slide of shift fork 12, can mesh with gear Z12 along axle 4; Stepped gear Z10, Z11 can slide along axle 4 under the stirring of shift fork 11, make gear Z10 and Z14 engagement, or make gear Z11 and Z12 engagement.Shift fork 12, shift fork 11 are fixedly mounted on the casing 9 by axle.

Axle 6 by bearing installation on casing 9, and parallel with spools 5.Gear Z16 is fixed on the middle part of axle 6 by key, engagement gear ring Z16 ' in being processed with respectively on the same circumference of its spoke both sides, a pair of gear Z17 sky is enclosed within on the axle 6 of gear Z16 both sides, is arranged with the spring 16 that contacts with the Z17 spoke respectively on the two gear Z17 outer shaft 6.The a pair of shift fork 13 that turns to is fixedly mounted on the casing 9 of a pair of steering gear Z17 one side top by axle and axle sleeve.Gear Z13 and Z16 are constant mesh gear.

The axle 7 by bearing installation on casing 9, and be parallel to the axle 6.A pair of gear Z18 is installed on the axle 7 with the spline form, is provided with axle sleeve between the two gear Z18.Gear Z17 and Z18 are constant mesh gear.

Axle 8, and is parallel to and is positioned at axle 4 opposite side on casing 9 by bearing installation, and the stepped gear that gear Z19 and Z20 form is installed on the axle 8 by lining, the coaxial wide gear Z21 that also is equipped with.Gear Z19 and Z12, wide gear Z21 and gear Z11 are constant mesh gear; By the gear mesh on wide gear Z21 and the rotovator, can make power pass to rotovator.

As seen from Figure 2, the spoke of finishing bevel gear cuter Z8 is provided with an annular groove, and interior making and settlement rotating ring 15 has a breach on the brake hoop 15, and an end of brake bar 14 is installed in the breach of brake hoop 15.

In the use, this each grade of change speed gear box drive path is as follows:

One grade: by shift fork 10 traveling gear Z6, make gear Z6 and gear Z5 engagement, again by shift fork 12 handsetting gear Z9, make gear Z9 and gear Z12 engagement, all the other gears are constant-mesh, and its transmitting ratio is i=179.

Second gear: make gear Z6 and gear Z5 engagement, Z9 is allocated to neutral gear with gear, by shift fork 11 traveling gear Z10, makes gear Z10 and gear Z14 engagement, and all the other gears are constant-mesh, and its transmitting ratio is i=112.

Third gear: make gear Z6 and gear Z5 engagement, Z9 is allocated to neutral gear with gear, by shift fork 11 traveling gear Z11, makes gear Z11 and gear Z15 engagement, and all the other gears are constant-mesh, and its transmitting ratio is i=73.

Fourth gear: make shift fork 10 traveling gear Z6, make the interior engagement gear ring Z6 ' and gear Z4 engagement of gear Z6, again by shift fork 12 traveling gear Z9, make gear Z9 and gear Z12 engagement, all the other gears are constant-mesh, and its transmitting ratio is i=48.

Five grades: make the interior engagement gear ring Z6 ' and gear Z4 engagement of gear Z6, Z9 is allocated to neutral gear with gear, by shift fork 11 traveling gear Z10, makes gear Z10 and gear Z14 engagement, and all the other gears are constant-mesh, and its transmitting ratio is i=30.

Six grades: make the interior engagement gear ring Z6 ' and gear Z4 engagement of gear Z6, Z9 is allocated to neutral gear with gear, by shift fork 11 traveling gear Z11, makes gear Z11 and gear Z15 engagement, and all the other gears are constant-mesh, and its transmitting ratio is i=19.

Fall one grade: by shift fork 10 traveling gear Z6, make gear Z6 and gear Z5 engagement, again by shift fork 12 handsetting gear Z9, make gear Z9 and gear Z20 engagement, all the other gears are constant-mesh, and its transmitting ratio is i=273.

Fall second gear: make shift fork 10 traveling gear Z6, make the interior engagement gear ring Z6 ' and gear Z4 engagement of gear Z6, again by shift fork 12 traveling gear Z9, gear Z9 and gear Z20 are meshed, all the other gears are constant-mesh, and its transmitting ratio is i=73.

By figure one as seen, the effect of brake hoop 15 is: when the needs emergency braking, brake bar 14 is under the maneuvering system effect, it is big with the breach support of brake hoop 15 to rotate an angle, brake hoop 15 also rises greatly thereupon, under the effect of friction between brake hoop 15 and the finishing bevel gear cuter Z8 spoke, finishing bevel gear cuter Z8 stops operating, and promptly realizes braking effect.

Under the straight-line travelling situation, the interior toothed ring gear Z16 ' engagement of the external tooth of two steering gear Z17 and gear Z16 spoke both sides, and under the effect of spring 16, keep constant-mesh.When the need turnon left, the left side turn to shift fork 13 under the maneuvering system effect, outwards rotate an angle, the steering gear Z17 that forces the left side deviates from from the interior toothed ring gear Z16 ' in gear Z16 left side, thereby cuts off left side power, can realize turnon left.The operating process that realizes right-hand corner is the same, and that just grasps object Ying Shi the right turns to shift fork 13.

Claims

1, gear box of tractor is made up of casing, gear wheel shaft, gear and shift fork, it is characterized in that: this change speed gear box comprises eight axles, 21 kinds of gears etc.,

(3) axle 3 is by the parallel top of being located at axle 2 of bearing, be provided with the stepped gear, the gear Z6 that form by Z2 and Z4 on it successively, and a side of gear Z6 spoke be provided with gear Z4 ingear in engagement gear ring Z6 ', gear Z1 and Z2, gear Z3 and Z4 nibble and are constant-mesh, gear Z6 can mesh with gear Z5 by shift fork 10 forks, and shift fork 10 is by being located on the casing, and axle 3 axle heads that are positioned at box inside are provided with finishing bevel gear cuter Z7;

(6) axle 6 is located on the casing by bearing, and parallel and axle 5, gear Z16 is located at the middle part of axle 6, be respectively equipped with gear Z17 on gear Z16 two side shafts 6, gear Z13 and Z16 are constant mesh gear, gear Z16 spoke both sides be respectively equipped with the Z17 ingear in engagement gear ring Z16 ', be arranged with the spring that contacts with the Z17 spoke respectively on the two gear Z17 outer shaft 6.

2, gear box of tractor according to claim 1 is characterized in that: an end of axle 2 is located in the axis hole of axle 1 by coaxial bearing, and described bearing is a needle bearing.

3, gear box of tractor according to claim 1 is characterized in that: the axle of one section of sheathed gear Z6 is castellated shaft on the axle 3.

4, gear box of tractor according to claim 1 is characterized in that: axle 4 is castellated shaft.